M: David Lechner <david@lechnology.com>
T: git git://anongit.freedesktop.org/drm/drm-misc
S: Maintained
-F: drivers/gpu/drm/tinydrm/ili9225.c
+F: drivers/gpu/drm/tiny/ili9225.c
F: Documentation/devicetree/bindings/display/ilitek,ili9225.txt
DRM DRIVER FOR HX8357D PANELS
M: Eric Anholt <eric@anholt.net>
T: git git://anongit.freedesktop.org/drm/drm-misc
S: Maintained
-F: drivers/gpu/drm/tinydrm/hx8357d.c
+F: drivers/gpu/drm/tiny/hx8357d.c
F: Documentation/devicetree/bindings/display/himax,hx8357d.txt
DRM DRIVER FOR INTEL I810 VIDEO CARDS
M: Noralf Trønnes <noralf@tronnes.org>
T: git git://anongit.freedesktop.org/drm/drm-misc
S: Maintained
-F: drivers/gpu/drm/tinydrm/mi0283qt.c
+F: drivers/gpu/drm/tiny/mi0283qt.c
F: Documentation/devicetree/bindings/display/multi-inno,mi0283qt.txt
DRM DRIVER FOR MSM ADRENO GPU
M: Noralf Trønnes <noralf@tronnes.org>
T: git git://anongit.freedesktop.org/drm/drm-misc
S: Maintained
-F: drivers/gpu/drm/tinydrm/repaper.c
+F: drivers/gpu/drm/tiny/repaper.c
F: Documentation/devicetree/bindings/display/repaper.txt
DRM DRIVER FOR QEMU'S CIRRUS DEVICE
M: David Lechner <david@lechnology.com>
T: git git://anongit.freedesktop.org/drm/drm-misc
S: Maintained
-F: drivers/gpu/drm/tinydrm/st7586.c
+F: drivers/gpu/drm/tiny/st7586.c
F: Documentation/devicetree/bindings/display/sitronix,st7586.txt
DRM DRIVER FOR SITRONIX ST7735R PANELS
M: David Lechner <david@lechnology.com>
T: git git://anongit.freedesktop.org/drm/drm-misc
S: Maintained
-F: drivers/gpu/drm/tinydrm/st7735r.c
+F: drivers/gpu/drm/tiny/st7735r.c
F: Documentation/devicetree/bindings/display/sitronix,st7735r.txt
DRM DRIVER FOR ST-ERICSSON MCDE
source "drivers/gpu/drm/meson/Kconfig"
-source "drivers/gpu/drm/tinydrm/Kconfig"
+source "drivers/gpu/drm/tiny/Kconfig"
source "drivers/gpu/drm/pl111/Kconfig"
obj-y += hisilicon/
obj-$(CONFIG_DRM_ZTE) += zte/
obj-$(CONFIG_DRM_MXSFB) += mxsfb/
-obj-y += tinydrm/
+obj-y += tiny/
obj-$(CONFIG_DRM_PL111) += pl111/
obj-$(CONFIG_DRM_TVE200) += tve200/
obj-$(CONFIG_DRM_XEN) += xen/
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-only
+config TINYDRM_HX8357D
+ tristate "DRM support for HX8357D display panels"
+ depends on DRM && SPI
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_MIPI_DBI
+ select BACKLIGHT_CLASS_DEVICE
+ help
+ DRM driver for the following HX8357D panels:
+ * YX350HV15-T 3.5" 340x350 TFT (Adafruit 3.5")
+
+ If M is selected the module will be called hx8357d.
+
+config TINYDRM_ILI9225
+ tristate "DRM support for ILI9225 display panels"
+ depends on DRM && SPI
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_MIPI_DBI
+ help
+ DRM driver for the following Ilitek ILI9225 panels:
+ * No-name 2.2" color screen module
+
+ If M is selected the module will be called ili9225.
+
+config TINYDRM_ILI9341
+ tristate "DRM support for ILI9341 display panels"
+ depends on DRM && SPI
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_MIPI_DBI
+ select BACKLIGHT_CLASS_DEVICE
+ help
+ DRM driver for the following Ilitek ILI9341 panels:
+ * YX240QV29-T 2.4" 240x320 TFT (Adafruit 2.4")
+
+ If M is selected the module will be called ili9341.
+
+config TINYDRM_MI0283QT
+ tristate "DRM support for MI0283QT"
+ depends on DRM && SPI
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_MIPI_DBI
+ select BACKLIGHT_CLASS_DEVICE
+ help
+ DRM driver for the Multi-Inno MI0283QT display panel
+ If M is selected the module will be called mi0283qt.
+
+config TINYDRM_REPAPER
+ tristate "DRM support for Pervasive Displays RePaper panels (V231)"
+ depends on DRM && SPI
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ depends on THERMAL || !THERMAL
+ help
+ DRM driver for the following Pervasive Displays panels:
+ 1.44" TFT EPD Panel (E1144CS021)
+ 1.90" TFT EPD Panel (E1190CS021)
+ 2.00" TFT EPD Panel (E2200CS021)
+ 2.71" TFT EPD Panel (E2271CS021)
+
+ If M is selected the module will be called repaper.
+
+config TINYDRM_ST7586
+ tristate "DRM support for Sitronix ST7586 display panels"
+ depends on DRM && SPI
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_MIPI_DBI
+ help
+ DRM driver for the following Sitronix ST7586 panels:
+ * LEGO MINDSTORMS EV3
+
+ If M is selected the module will be called st7586.
+
+config TINYDRM_ST7735R
+ tristate "DRM support for Sitronix ST7735R display panels"
+ depends on DRM && SPI
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_MIPI_DBI
+ select BACKLIGHT_CLASS_DEVICE
+ help
+ DRM driver Sitronix ST7735R with one of the following LCDs:
+ * JD-T18003-T01 1.8" 128x160 TFT
+
+ If M is selected the module will be called st7735r.
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_TINYDRM_HX8357D) += hx8357d.o
+obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o
+obj-$(CONFIG_TINYDRM_ILI9341) += ili9341.o
+obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o
+obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o
+obj-$(CONFIG_TINYDRM_ST7586) += st7586.o
+obj-$(CONFIG_TINYDRM_ST7735R) += st7735r.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for the HX8357D LCD controller
+ *
+ * Copyright 2018 Broadcom
+ * Copyright 2018 David Lechner <david@lechnology.com>
+ * Copyright 2016 Noralf Trønnes
+ * Copyright (C) 2015 Adafruit Industries
+ * Copyright (C) 2013 Christian Vogelgsang
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modeset_helper.h>
+#include <video/mipi_display.h>
+
+#define HX8357D_SETOSC 0xb0
+#define HX8357D_SETPOWER 0xb1
+#define HX8357D_SETRGB 0xb3
+#define HX8357D_SETCYC 0xb3
+#define HX8357D_SETCOM 0xb6
+#define HX8357D_SETEXTC 0xb9
+#define HX8357D_SETSTBA 0xc0
+#define HX8357D_SETPANEL 0xcc
+#define HX8357D_SETGAMMA 0xe0
+
+#define HX8357D_MADCTL_MY 0x80
+#define HX8357D_MADCTL_MX 0x40
+#define HX8357D_MADCTL_MV 0x20
+#define HX8357D_MADCTL_ML 0x10
+#define HX8357D_MADCTL_RGB 0x00
+#define HX8357D_MADCTL_BGR 0x08
+#define HX8357D_MADCTL_MH 0x04
+
+static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ u8 addr_mode;
+ int ret, idx;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ ret = mipi_dbi_poweron_conditional_reset(dbidev);
+ if (ret < 0)
+ goto out_exit;
+ if (ret == 1)
+ goto out_enable;
+
+ /* setextc */
+ mipi_dbi_command(dbi, HX8357D_SETEXTC, 0xFF, 0x83, 0x57);
+ msleep(150);
+
+ /* setRGB which also enables SDO */
+ mipi_dbi_command(dbi, HX8357D_SETRGB, 0x00, 0x00, 0x06, 0x06);
+
+ /* -1.52V */
+ mipi_dbi_command(dbi, HX8357D_SETCOM, 0x25);
+
+ /* Normal mode 70Hz, Idle mode 55 Hz */
+ mipi_dbi_command(dbi, HX8357D_SETOSC, 0x68);
+
+ /* Set Panel - BGR, Gate direction swapped */
+ mipi_dbi_command(dbi, HX8357D_SETPANEL, 0x05);
+
+ mipi_dbi_command(dbi, HX8357D_SETPOWER,
+ 0x00, /* Not deep standby */
+ 0x15, /* BT */
+ 0x1C, /* VSPR */
+ 0x1C, /* VSNR */
+ 0x83, /* AP */
+ 0xAA); /* FS */
+
+ mipi_dbi_command(dbi, HX8357D_SETSTBA,
+ 0x50, /* OPON normal */
+ 0x50, /* OPON idle */
+ 0x01, /* STBA */
+ 0x3C, /* STBA */
+ 0x1E, /* STBA */
+ 0x08); /* GEN */
+
+ mipi_dbi_command(dbi, HX8357D_SETCYC,
+ 0x02, /* NW 0x02 */
+ 0x40, /* RTN */
+ 0x00, /* DIV */
+ 0x2A, /* DUM */
+ 0x2A, /* DUM */
+ 0x0D, /* GDON */
+ 0x78); /* GDOFF */
+
+ mipi_dbi_command(dbi, HX8357D_SETGAMMA,
+ 0x02,
+ 0x0A,
+ 0x11,
+ 0x1d,
+ 0x23,
+ 0x35,
+ 0x41,
+ 0x4b,
+ 0x4b,
+ 0x42,
+ 0x3A,
+ 0x27,
+ 0x1B,
+ 0x08,
+ 0x09,
+ 0x03,
+ 0x02,
+ 0x0A,
+ 0x11,
+ 0x1d,
+ 0x23,
+ 0x35,
+ 0x41,
+ 0x4b,
+ 0x4b,
+ 0x42,
+ 0x3A,
+ 0x27,
+ 0x1B,
+ 0x08,
+ 0x09,
+ 0x03,
+ 0x00,
+ 0x01);
+
+ /* 16 bit */
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
+ MIPI_DCS_PIXEL_FMT_16BIT);
+
+ /* TE off */
+ mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_ON, 0x00);
+
+ /* tear line */
+ mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02);
+
+ /* Exit Sleep */
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+ msleep(150);
+
+ /* display on */
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+ usleep_range(5000, 7000);
+
+out_enable:
+ switch (dbidev->rotation) {
+ default:
+ addr_mode = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
+ break;
+ case 90:
+ addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
+ break;
+ case 180:
+ addr_mode = 0;
+ break;
+ case 270:
+ addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
+ break;
+ }
+ mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+ mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs hx8357d_pipe_funcs = {
+ .enable = yx240qv29_enable,
+ .disable = mipi_dbi_pipe_disable,
+ .update = mipi_dbi_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode yx350hv15_mode = {
+ DRM_SIMPLE_MODE(320, 480, 60, 75),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(hx8357d_fops);
+
+static struct drm_driver hx8357d_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &hx8357d_fops,
+ .release = mipi_dbi_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .debugfs_init = mipi_dbi_debugfs_init,
+ .name = "hx8357d",
+ .desc = "HX8357D",
+ .date = "20181023",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id hx8357d_of_match[] = {
+ { .compatible = "adafruit,yx350hv15" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, hx8357d_of_match);
+
+static const struct spi_device_id hx8357d_id[] = {
+ { "yx350hv15", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, hx8357d_id);
+
+static int hx8357d_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct mipi_dbi_dev *dbidev;
+ struct drm_device *drm;
+ struct gpio_desc *dc;
+ u32 rotation = 0;
+ int ret;
+
+ dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+ if (!dbidev)
+ return -ENOMEM;
+
+ drm = &dbidev->drm;
+ ret = devm_drm_dev_init(dev, drm, &hx8357d_driver);
+ if (ret) {
+ kfree(dbidev);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+
+ dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW);
+ if (IS_ERR(dc)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+ return PTR_ERR(dc);
+ }
+
+ dbidev->backlight = devm_of_find_backlight(dev);
+ if (IS_ERR(dbidev->backlight))
+ return PTR_ERR(dbidev->backlight);
+
+ device_property_read_u32(dev, "rotation", &rotation);
+
+ ret = mipi_dbi_spi_init(spi, &dbidev->dbi, dc);
+ if (ret)
+ return ret;
+
+ ret = mipi_dbi_dev_init(dbidev, &hx8357d_pipe_funcs, &yx350hv15_mode, rotation);
+ if (ret)
+ return ret;
+
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, drm);
+
+ drm_fbdev_generic_setup(drm, 0);
+
+ return 0;
+}
+
+static int hx8357d_remove(struct spi_device *spi)
+{
+ struct drm_device *drm = spi_get_drvdata(spi);
+
+ drm_dev_unplug(drm);
+ drm_atomic_helper_shutdown(drm);
+
+ return 0;
+}
+
+static void hx8357d_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver hx8357d_spi_driver = {
+ .driver = {
+ .name = "hx8357d",
+ .of_match_table = hx8357d_of_match,
+ },
+ .id_table = hx8357d_id,
+ .probe = hx8357d_probe,
+ .remove = hx8357d_remove,
+ .shutdown = hx8357d_shutdown,
+};
+module_spi_driver(hx8357d_spi_driver);
+
+MODULE_DESCRIPTION("HX8357D DRM driver");
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Ilitek ILI9225 panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ *
+ * Some code copied from mipi-dbi.c
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_rect.h>
+#include <drm/drm_vblank.h>
+
+#define ILI9225_DRIVER_READ_CODE 0x00
+#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
+#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02
+#define ILI9225_ENTRY_MODE 0x03
+#define ILI9225_DISPLAY_CONTROL_1 0x07
+#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08
+#define ILI9225_FRAME_CYCLE_CONTROL 0x0b
+#define ILI9225_INTERFACE_CONTROL 0x0c
+#define ILI9225_OSCILLATION_CONTROL 0x0f
+#define ILI9225_POWER_CONTROL_1 0x10
+#define ILI9225_POWER_CONTROL_2 0x11
+#define ILI9225_POWER_CONTROL_3 0x12
+#define ILI9225_POWER_CONTROL_4 0x13
+#define ILI9225_POWER_CONTROL_5 0x14
+#define ILI9225_VCI_RECYCLING 0x15
+#define ILI9225_RAM_ADDRESS_SET_1 0x20
+#define ILI9225_RAM_ADDRESS_SET_2 0x21
+#define ILI9225_WRITE_DATA_TO_GRAM 0x22
+#define ILI9225_SOFTWARE_RESET 0x28
+#define ILI9225_GATE_SCAN_CONTROL 0x30
+#define ILI9225_VERTICAL_SCROLL_1 0x31
+#define ILI9225_VERTICAL_SCROLL_2 0x32
+#define ILI9225_VERTICAL_SCROLL_3 0x33
+#define ILI9225_PARTIAL_DRIVING_POS_1 0x34
+#define ILI9225_PARTIAL_DRIVING_POS_2 0x35
+#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36
+#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37
+#define ILI9225_VERT_WINDOW_ADDR_1 0x38
+#define ILI9225_VERT_WINDOW_ADDR_2 0x39
+#define ILI9225_GAMMA_CONTROL_1 0x50
+#define ILI9225_GAMMA_CONTROL_2 0x51
+#define ILI9225_GAMMA_CONTROL_3 0x52
+#define ILI9225_GAMMA_CONTROL_4 0x53
+#define ILI9225_GAMMA_CONTROL_5 0x54
+#define ILI9225_GAMMA_CONTROL_6 0x55
+#define ILI9225_GAMMA_CONTROL_7 0x56
+#define ILI9225_GAMMA_CONTROL_8 0x57
+#define ILI9225_GAMMA_CONTROL_9 0x58
+#define ILI9225_GAMMA_CONTROL_10 0x59
+
+static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
+{
+ u8 par[2] = { data >> 8, data & 0xff };
+
+ return mipi_dbi_command_buf(dbi, cmd, par, 2);
+}
+
+static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
+{
+ struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
+ unsigned int height = rect->y2 - rect->y1;
+ unsigned int width = rect->x2 - rect->x1;
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ bool swap = dbi->swap_bytes;
+ u16 x_start, y_start;
+ u16 x1, x2, y1, y2;
+ int idx, ret = 0;
+ bool full;
+ void *tr;
+
+ if (!dbidev->enabled)
+ return;
+
+ if (!drm_dev_enter(fb->dev, &idx))
+ return;
+
+ full = width == fb->width && height == fb->height;
+
+ DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
+
+ if (!dbi->dc || !full || swap ||
+ fb->format->format == DRM_FORMAT_XRGB8888) {
+ tr = dbidev->tx_buf;
+ ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap);
+ if (ret)
+ goto err_msg;
+ } else {
+ tr = cma_obj->vaddr;
+ }
+
+ switch (dbidev->rotation) {
+ default:
+ x1 = rect->x1;
+ x2 = rect->x2 - 1;
+ y1 = rect->y1;
+ y2 = rect->y2 - 1;
+ x_start = x1;
+ y_start = y1;
+ break;
+ case 90:
+ x1 = rect->y1;
+ x2 = rect->y2 - 1;
+ y1 = fb->width - rect->x2;
+ y2 = fb->width - rect->x1 - 1;
+ x_start = x1;
+ y_start = y2;
+ break;
+ case 180:
+ x1 = fb->width - rect->x2;
+ x2 = fb->width - rect->x1 - 1;
+ y1 = fb->height - rect->y2;
+ y2 = fb->height - rect->y1 - 1;
+ x_start = x2;
+ y_start = y2;
+ break;
+ case 270:
+ x1 = fb->height - rect->y2;
+ x2 = fb->height - rect->y1 - 1;
+ y1 = rect->x1;
+ y2 = rect->x2 - 1;
+ x_start = x2;
+ y_start = y1;
+ break;
+ }
+
+ ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
+ ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
+ ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
+ ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
+
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
+
+ ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
+ width * height * 2);
+err_msg:
+ if (ret)
+ dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
+
+ drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *old_state)
+{
+ struct drm_plane_state *state = pipe->plane.state;
+ struct drm_crtc *crtc = &pipe->crtc;
+ struct drm_rect rect;
+
+ if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+ ili9225_fb_dirty(state->fb, &rect);
+
+ if (crtc->state->event) {
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ crtc->state->event = NULL;
+ }
+}
+
+static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct drm_framebuffer *fb = plane_state->fb;
+ struct device *dev = pipe->crtc.dev->dev;
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ struct drm_rect rect = {
+ .x1 = 0,
+ .x2 = fb->width,
+ .y1 = 0,
+ .y2 = fb->height,
+ };
+ int ret, idx;
+ u8 am_id;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ mipi_dbi_hw_reset(dbi);
+
+ /*
+ * There don't seem to be two example init sequences that match, so
+ * using the one from the popular Arduino library for this display.
+ * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
+ */
+
+ ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
+ goto out_exit;
+ }
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
+
+ msleep(40);
+
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
+
+ msleep(10);
+
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
+
+ msleep(50);
+
+ switch (dbidev->rotation) {
+ default:
+ am_id = 0x30;
+ break;
+ case 90:
+ am_id = 0x18;
+ break;
+ case 180:
+ am_id = 0x00;
+ break;
+ case 270:
+ am_id = 0x28;
+ break;
+ }
+ ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
+ ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
+ ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+ ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
+ ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
+ ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
+ ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
+ ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
+
+ ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
+ ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
+ ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
+ ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
+ ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
+ ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
+
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
+
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
+
+ msleep(50);
+
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
+
+ dbidev->enabled = true;
+ ili9225_fb_dirty(fb, &rect);
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct mipi_dbi *dbi = &dbidev->dbi;
+
+ DRM_DEBUG_KMS("\n");
+
+ /*
+ * This callback is not protected by drm_dev_enter/exit since we want to
+ * turn off the display on regular driver unload. It's highly unlikely
+ * that the underlying SPI controller is gone should this be called after
+ * unplug.
+ */
+
+ if (!dbidev->enabled)
+ return;
+
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+ msleep(50);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
+ msleep(50);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
+
+ dbidev->enabled = false;
+}
+
+static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
+ size_t num)
+{
+ struct spi_device *spi = dbi->spi;
+ unsigned int bpw = 8;
+ u32 speed_hz;
+ int ret;
+
+ gpiod_set_value_cansleep(dbi->dc, 0);
+ speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
+ ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
+ if (ret || !num)
+ return ret;
+
+ if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
+ bpw = 16;
+
+ gpiod_set_value_cansleep(dbi->dc, 1);
+ speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
+
+ return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
+}
+
+static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
+ .enable = ili9225_pipe_enable,
+ .disable = ili9225_pipe_disable,
+ .update = ili9225_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode ili9225_mode = {
+ DRM_SIMPLE_MODE(176, 220, 35, 44),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(ili9225_fops);
+
+static struct drm_driver ili9225_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &ili9225_fops,
+ .release = mipi_dbi_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .name = "ili9225",
+ .desc = "Ilitek ILI9225",
+ .date = "20171106",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id ili9225_of_match[] = {
+ { .compatible = "vot,v220hf01a-t" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ili9225_of_match);
+
+static const struct spi_device_id ili9225_id[] = {
+ { "v220hf01a-t", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, ili9225_id);
+
+static int ili9225_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct mipi_dbi_dev *dbidev;
+ struct drm_device *drm;
+ struct mipi_dbi *dbi;
+ struct gpio_desc *rs;
+ u32 rotation = 0;
+ int ret;
+
+ dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+ if (!dbidev)
+ return -ENOMEM;
+
+ dbi = &dbidev->dbi;
+ drm = &dbidev->drm;
+ ret = devm_drm_dev_init(dev, drm, &ili9225_driver);
+ if (ret) {
+ kfree(dbidev);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+
+ dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(dbi->reset)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+ return PTR_ERR(dbi->reset);
+ }
+
+ rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
+ if (IS_ERR(rs)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'rs'\n");
+ return PTR_ERR(rs);
+ }
+
+ device_property_read_u32(dev, "rotation", &rotation);
+
+ ret = mipi_dbi_spi_init(spi, dbi, rs);
+ if (ret)
+ return ret;
+
+ /* override the command function set in mipi_dbi_spi_init() */
+ dbi->command = ili9225_dbi_command;
+
+ ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
+ if (ret)
+ return ret;
+
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, drm);
+
+ drm_fbdev_generic_setup(drm, 0);
+
+ return 0;
+}
+
+static int ili9225_remove(struct spi_device *spi)
+{
+ struct drm_device *drm = spi_get_drvdata(spi);
+
+ drm_dev_unplug(drm);
+ drm_atomic_helper_shutdown(drm);
+
+ return 0;
+}
+
+static void ili9225_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver ili9225_spi_driver = {
+ .driver = {
+ .name = "ili9225",
+ .owner = THIS_MODULE,
+ .of_match_table = ili9225_of_match,
+ },
+ .id_table = ili9225_id,
+ .probe = ili9225_probe,
+ .remove = ili9225_remove,
+ .shutdown = ili9225_shutdown,
+};
+module_spi_driver(ili9225_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for Ilitek ILI9341 panels
+ *
+ * Copyright 2018 David Lechner <david@lechnology.com>
+ *
+ * Based on mi0283qt.c:
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modeset_helper.h>
+#include <video/mipi_display.h>
+
+#define ILI9341_FRMCTR1 0xb1
+#define ILI9341_DISCTRL 0xb6
+#define ILI9341_ETMOD 0xb7
+
+#define ILI9341_PWCTRL1 0xc0
+#define ILI9341_PWCTRL2 0xc1
+#define ILI9341_VMCTRL1 0xc5
+#define ILI9341_VMCTRL2 0xc7
+#define ILI9341_PWCTRLA 0xcb
+#define ILI9341_PWCTRLB 0xcf
+
+#define ILI9341_PGAMCTRL 0xe0
+#define ILI9341_NGAMCTRL 0xe1
+#define ILI9341_DTCTRLA 0xe8
+#define ILI9341_DTCTRLB 0xea
+#define ILI9341_PWRSEQ 0xed
+
+#define ILI9341_EN3GAM 0xf2
+#define ILI9341_PUMPCTRL 0xf7
+
+#define ILI9341_MADCTL_BGR BIT(3)
+#define ILI9341_MADCTL_MV BIT(5)
+#define ILI9341_MADCTL_MX BIT(6)
+#define ILI9341_MADCTL_MY BIT(7)
+
+static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ u8 addr_mode;
+ int ret, idx;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ ret = mipi_dbi_poweron_conditional_reset(dbidev);
+ if (ret < 0)
+ goto out_exit;
+ if (ret == 1)
+ goto out_enable;
+
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+
+ mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
+ mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
+ mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
+ mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
+ mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
+ mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
+
+ /* Power Control */
+ mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
+ mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
+ /* VCOM */
+ mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
+ mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);
+
+ /* Memory Access Control */
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
+
+ /* Frame Rate */
+ mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
+
+ /* Gamma */
+ mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
+ mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
+ 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
+ 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
+ mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
+ 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
+ 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
+
+ /* DDRAM */
+ mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
+
+ /* Display */
+ mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+ msleep(100);
+
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+ msleep(100);
+
+out_enable:
+ switch (dbidev->rotation) {
+ default:
+ addr_mode = ILI9341_MADCTL_MX;
+ break;
+ case 90:
+ addr_mode = ILI9341_MADCTL_MV;
+ break;
+ case 180:
+ addr_mode = ILI9341_MADCTL_MY;
+ break;
+ case 270:
+ addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
+ ILI9341_MADCTL_MX;
+ break;
+ }
+ addr_mode |= ILI9341_MADCTL_BGR;
+ mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+ mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
+ .enable = yx240qv29_enable,
+ .disable = mipi_dbi_pipe_disable,
+ .update = mipi_dbi_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode yx240qv29_mode = {
+ DRM_SIMPLE_MODE(240, 320, 37, 49),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);
+
+static struct drm_driver ili9341_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &ili9341_fops,
+ .release = mipi_dbi_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .debugfs_init = mipi_dbi_debugfs_init,
+ .name = "ili9341",
+ .desc = "Ilitek ILI9341",
+ .date = "20180514",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id ili9341_of_match[] = {
+ { .compatible = "adafruit,yx240qv29" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ili9341_of_match);
+
+static const struct spi_device_id ili9341_id[] = {
+ { "yx240qv29", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, ili9341_id);
+
+static int ili9341_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct mipi_dbi_dev *dbidev;
+ struct drm_device *drm;
+ struct mipi_dbi *dbi;
+ struct gpio_desc *dc;
+ u32 rotation = 0;
+ int ret;
+
+ dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+ if (!dbidev)
+ return -ENOMEM;
+
+ dbi = &dbidev->dbi;
+ drm = &dbidev->drm;
+ ret = devm_drm_dev_init(dev, drm, &ili9341_driver);
+ if (ret) {
+ kfree(dbidev);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+
+ dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(dbi->reset)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+ return PTR_ERR(dbi->reset);
+ }
+
+ dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
+ if (IS_ERR(dc)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+ return PTR_ERR(dc);
+ }
+
+ dbidev->backlight = devm_of_find_backlight(dev);
+ if (IS_ERR(dbidev->backlight))
+ return PTR_ERR(dbidev->backlight);
+
+ device_property_read_u32(dev, "rotation", &rotation);
+
+ ret = mipi_dbi_spi_init(spi, dbi, dc);
+ if (ret)
+ return ret;
+
+ ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
+ if (ret)
+ return ret;
+
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, drm);
+
+ drm_fbdev_generic_setup(drm, 0);
+
+ return 0;
+}
+
+static int ili9341_remove(struct spi_device *spi)
+{
+ struct drm_device *drm = spi_get_drvdata(spi);
+
+ drm_dev_unplug(drm);
+ drm_atomic_helper_shutdown(drm);
+
+ return 0;
+}
+
+static void ili9341_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver ili9341_spi_driver = {
+ .driver = {
+ .name = "ili9341",
+ .of_match_table = ili9341_of_match,
+ },
+ .id_table = ili9341_id,
+ .probe = ili9341_probe,
+ .remove = ili9341_remove,
+ .shutdown = ili9341_shutdown,
+};
+module_spi_driver(ili9341_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Multi-Inno MI0283QT panels
+ *
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modeset_helper.h>
+#include <video/mipi_display.h>
+
+#define ILI9341_FRMCTR1 0xb1
+#define ILI9341_DISCTRL 0xb6
+#define ILI9341_ETMOD 0xb7
+
+#define ILI9341_PWCTRL1 0xc0
+#define ILI9341_PWCTRL2 0xc1
+#define ILI9341_VMCTRL1 0xc5
+#define ILI9341_VMCTRL2 0xc7
+#define ILI9341_PWCTRLA 0xcb
+#define ILI9341_PWCTRLB 0xcf
+
+#define ILI9341_PGAMCTRL 0xe0
+#define ILI9341_NGAMCTRL 0xe1
+#define ILI9341_DTCTRLA 0xe8
+#define ILI9341_DTCTRLB 0xea
+#define ILI9341_PWRSEQ 0xed
+
+#define ILI9341_EN3GAM 0xf2
+#define ILI9341_PUMPCTRL 0xf7
+
+#define ILI9341_MADCTL_BGR BIT(3)
+#define ILI9341_MADCTL_MV BIT(5)
+#define ILI9341_MADCTL_MX BIT(6)
+#define ILI9341_MADCTL_MY BIT(7)
+
+static void mi0283qt_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ u8 addr_mode;
+ int ret, idx;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ ret = mipi_dbi_poweron_conditional_reset(dbidev);
+ if (ret < 0)
+ goto out_exit;
+ if (ret == 1)
+ goto out_enable;
+
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+
+ mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30);
+ mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
+ mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79);
+ mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
+ mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
+ mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
+
+ /* Power Control */
+ mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x26);
+ mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x11);
+ /* VCOM */
+ mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x35, 0x3e);
+ mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0xbe);
+
+ /* Memory Access Control */
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
+
+ /* Frame Rate */
+ mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
+
+ /* Gamma */
+ mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x08);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
+ mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
+ 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,
+ 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);
+ mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
+ 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,
+ 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);
+
+ /* DDRAM */
+ mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
+
+ /* Display */
+ mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00);
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+ msleep(100);
+
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+ msleep(100);
+
+out_enable:
+ /* The PiTFT (ili9340) has a hardware reset circuit that
+ * resets only on power-on and not on each reboot through
+ * a gpio like the rpi-display does.
+ * As a result, we need to always apply the rotation value
+ * regardless of the display "on/off" state.
+ */
+ switch (dbidev->rotation) {
+ default:
+ addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
+ ILI9341_MADCTL_MX;
+ break;
+ case 90:
+ addr_mode = ILI9341_MADCTL_MY;
+ break;
+ case 180:
+ addr_mode = ILI9341_MADCTL_MV;
+ break;
+ case 270:
+ addr_mode = ILI9341_MADCTL_MX;
+ break;
+ }
+ addr_mode |= ILI9341_MADCTL_BGR;
+ mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+ mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {
+ .enable = mi0283qt_enable,
+ .disable = mipi_dbi_pipe_disable,
+ .update = mipi_dbi_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode mi0283qt_mode = {
+ DRM_SIMPLE_MODE(320, 240, 58, 43),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(mi0283qt_fops);
+
+static struct drm_driver mi0283qt_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &mi0283qt_fops,
+ .release = mipi_dbi_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .debugfs_init = mipi_dbi_debugfs_init,
+ .name = "mi0283qt",
+ .desc = "Multi-Inno MI0283QT",
+ .date = "20160614",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id mi0283qt_of_match[] = {
+ { .compatible = "multi-inno,mi0283qt" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mi0283qt_of_match);
+
+static const struct spi_device_id mi0283qt_id[] = {
+ { "mi0283qt", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, mi0283qt_id);
+
+static int mi0283qt_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct mipi_dbi_dev *dbidev;
+ struct drm_device *drm;
+ struct mipi_dbi *dbi;
+ struct gpio_desc *dc;
+ u32 rotation = 0;
+ int ret;
+
+ dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+ if (!dbidev)
+ return -ENOMEM;
+
+ dbi = &dbidev->dbi;
+ drm = &dbidev->drm;
+ ret = devm_drm_dev_init(dev, drm, &mi0283qt_driver);
+ if (ret) {
+ kfree(dbidev);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+
+ dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(dbi->reset)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+ return PTR_ERR(dbi->reset);
+ }
+
+ dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
+ if (IS_ERR(dc)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+ return PTR_ERR(dc);
+ }
+
+ dbidev->regulator = devm_regulator_get(dev, "power");
+ if (IS_ERR(dbidev->regulator))
+ return PTR_ERR(dbidev->regulator);
+
+ dbidev->backlight = devm_of_find_backlight(dev);
+ if (IS_ERR(dbidev->backlight))
+ return PTR_ERR(dbidev->backlight);
+
+ device_property_read_u32(dev, "rotation", &rotation);
+
+ ret = mipi_dbi_spi_init(spi, dbi, dc);
+ if (ret)
+ return ret;
+
+ ret = mipi_dbi_dev_init(dbidev, &mi0283qt_pipe_funcs, &mi0283qt_mode, rotation);
+ if (ret)
+ return ret;
+
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, drm);
+
+ drm_fbdev_generic_setup(drm, 0);
+
+ return 0;
+}
+
+static int mi0283qt_remove(struct spi_device *spi)
+{
+ struct drm_device *drm = spi_get_drvdata(spi);
+
+ drm_dev_unplug(drm);
+ drm_atomic_helper_shutdown(drm);
+
+ return 0;
+}
+
+static void mi0283qt_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static int __maybe_unused mi0283qt_pm_suspend(struct device *dev)
+{
+ return drm_mode_config_helper_suspend(dev_get_drvdata(dev));
+}
+
+static int __maybe_unused mi0283qt_pm_resume(struct device *dev)
+{
+ drm_mode_config_helper_resume(dev_get_drvdata(dev));
+
+ return 0;
+}
+
+static const struct dev_pm_ops mi0283qt_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume)
+};
+
+static struct spi_driver mi0283qt_spi_driver = {
+ .driver = {
+ .name = "mi0283qt",
+ .owner = THIS_MODULE,
+ .of_match_table = mi0283qt_of_match,
+ .pm = &mi0283qt_pm_ops,
+ },
+ .id_table = mi0283qt_id,
+ .probe = mi0283qt_probe,
+ .remove = mi0283qt_remove,
+ .shutdown = mi0283qt_shutdown,
+};
+module_spi_driver(mi0283qt_spi_driver);
+
+MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");
+MODULE_AUTHOR("Noralf Trønnes");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Pervasive Displays RePaper branded e-ink panels
+ *
+ * Copyright 2013-2017 Pervasive Displays, Inc.
+ * Copyright 2017 Noralf Trønnes
+ *
+ * The driver supports:
+ * Material Film: Aurora Mb (V231)
+ * Driver IC: G2 (eTC)
+ *
+ * The controller code was taken from the userspace driver:
+ * https://github.com/repaper/gratis
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/sched/clock.h>
+#include <linux/spi/spi.h>
+#include <linux/thermal.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_rect.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#define REPAPER_RID_G2_COG_ID 0x12
+
+enum repaper_model {
+ E1144CS021 = 1,
+ E1190CS021,
+ E2200CS021,
+ E2271CS021,
+};
+
+enum repaper_stage { /* Image pixel -> Display pixel */
+ REPAPER_COMPENSATE, /* B -> W, W -> B (Current Image) */
+ REPAPER_WHITE, /* B -> N, W -> W (Current Image) */
+ REPAPER_INVERSE, /* B -> N, W -> B (New Image) */
+ REPAPER_NORMAL /* B -> B, W -> W (New Image) */
+};
+
+enum repaper_epd_border_byte {
+ REPAPER_BORDER_BYTE_NONE,
+ REPAPER_BORDER_BYTE_ZERO,
+ REPAPER_BORDER_BYTE_SET,
+};
+
+struct repaper_epd {
+ struct drm_device drm;
+ struct drm_simple_display_pipe pipe;
+ const struct drm_display_mode *mode;
+ struct drm_connector connector;
+ struct spi_device *spi;
+
+ struct gpio_desc *panel_on;
+ struct gpio_desc *border;
+ struct gpio_desc *discharge;
+ struct gpio_desc *reset;
+ struct gpio_desc *busy;
+
+ struct thermal_zone_device *thermal;
+
+ unsigned int height;
+ unsigned int width;
+ unsigned int bytes_per_scan;
+ const u8 *channel_select;
+ unsigned int stage_time;
+ unsigned int factored_stage_time;
+ bool middle_scan;
+ bool pre_border_byte;
+ enum repaper_epd_border_byte border_byte;
+
+ u8 *line_buffer;
+ void *current_frame;
+
+ bool enabled;
+ bool cleared;
+ bool partial;
+};
+
+static inline struct repaper_epd *drm_to_epd(struct drm_device *drm)
+{
+ return container_of(drm, struct repaper_epd, drm);
+}
+
+static int repaper_spi_transfer(struct spi_device *spi, u8 header,
+ const void *tx, void *rx, size_t len)
+{
+ void *txbuf = NULL, *rxbuf = NULL;
+ struct spi_transfer tr[2] = {};
+ u8 *headerbuf;
+ int ret;
+
+ headerbuf = kmalloc(1, GFP_KERNEL);
+ if (!headerbuf)
+ return -ENOMEM;
+
+ headerbuf[0] = header;
+ tr[0].tx_buf = headerbuf;
+ tr[0].len = 1;
+
+ /* Stack allocated tx? */
+ if (tx && len <= 32) {
+ txbuf = kmemdup(tx, len, GFP_KERNEL);
+ if (!txbuf) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ }
+
+ if (rx) {
+ rxbuf = kmalloc(len, GFP_KERNEL);
+ if (!rxbuf) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ }
+
+ tr[1].tx_buf = txbuf ? txbuf : tx;
+ tr[1].rx_buf = rxbuf;
+ tr[1].len = len;
+
+ ndelay(80);
+ ret = spi_sync_transfer(spi, tr, 2);
+ if (rx && !ret)
+ memcpy(rx, rxbuf, len);
+
+out_free:
+ kfree(headerbuf);
+ kfree(txbuf);
+ kfree(rxbuf);
+
+ return ret;
+}
+
+static int repaper_write_buf(struct spi_device *spi, u8 reg,
+ const u8 *buf, size_t len)
+{
+ int ret;
+
+ ret = repaper_spi_transfer(spi, 0x70, ®, NULL, 1);
+ if (ret)
+ return ret;
+
+ return repaper_spi_transfer(spi, 0x72, buf, NULL, len);
+}
+
+static int repaper_write_val(struct spi_device *spi, u8 reg, u8 val)
+{
+ return repaper_write_buf(spi, reg, &val, 1);
+}
+
+static int repaper_read_val(struct spi_device *spi, u8 reg)
+{
+ int ret;
+ u8 val;
+
+ ret = repaper_spi_transfer(spi, 0x70, ®, NULL, 1);
+ if (ret)
+ return ret;
+
+ ret = repaper_spi_transfer(spi, 0x73, NULL, &val, 1);
+
+ return ret ? ret : val;
+}
+
+static int repaper_read_id(struct spi_device *spi)
+{
+ int ret;
+ u8 id;
+
+ ret = repaper_spi_transfer(spi, 0x71, NULL, &id, 1);
+
+ return ret ? ret : id;
+}
+
+static void repaper_spi_mosi_low(struct spi_device *spi)
+{
+ const u8 buf[1] = { 0 };
+
+ spi_write(spi, buf, 1);
+}
+
+/* pixels on display are numbered from 1 so even is actually bits 1,3,5,... */
+static void repaper_even_pixels(struct repaper_epd *epd, u8 **pp,
+ const u8 *data, u8 fixed_value, const u8 *mask,
+ enum repaper_stage stage)
+{
+ unsigned int b;
+
+ for (b = 0; b < (epd->width / 8); b++) {
+ if (data) {
+ u8 pixels = data[b] & 0xaa;
+ u8 pixel_mask = 0xff;
+ u8 p1, p2, p3, p4;
+
+ if (mask) {
+ pixel_mask = (mask[b] ^ pixels) & 0xaa;
+ pixel_mask |= pixel_mask >> 1;
+ }
+
+ switch (stage) {
+ case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
+ pixels = 0xaa | ((pixels ^ 0xaa) >> 1);
+ break;
+ case REPAPER_WHITE: /* B -> N, W -> W (Current) */
+ pixels = 0x55 + ((pixels ^ 0xaa) >> 1);
+ break;
+ case REPAPER_INVERSE: /* B -> N, W -> B (New) */
+ pixels = 0x55 | (pixels ^ 0xaa);
+ break;
+ case REPAPER_NORMAL: /* B -> B, W -> W (New) */
+ pixels = 0xaa | (pixels >> 1);
+ break;
+ }
+
+ pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55);
+ p1 = (pixels >> 6) & 0x03;
+ p2 = (pixels >> 4) & 0x03;
+ p3 = (pixels >> 2) & 0x03;
+ p4 = (pixels >> 0) & 0x03;
+ pixels = (p1 << 0) | (p2 << 2) | (p3 << 4) | (p4 << 6);
+ *(*pp)++ = pixels;
+ } else {
+ *(*pp)++ = fixed_value;
+ }
+ }
+}
+
+/* pixels on display are numbered from 1 so odd is actually bits 0,2,4,... */
+static void repaper_odd_pixels(struct repaper_epd *epd, u8 **pp,
+ const u8 *data, u8 fixed_value, const u8 *mask,
+ enum repaper_stage stage)
+{
+ unsigned int b;
+
+ for (b = epd->width / 8; b > 0; b--) {
+ if (data) {
+ u8 pixels = data[b - 1] & 0x55;
+ u8 pixel_mask = 0xff;
+
+ if (mask) {
+ pixel_mask = (mask[b - 1] ^ pixels) & 0x55;
+ pixel_mask |= pixel_mask << 1;
+ }
+
+ switch (stage) {
+ case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
+ pixels = 0xaa | (pixels ^ 0x55);
+ break;
+ case REPAPER_WHITE: /* B -> N, W -> W (Current) */
+ pixels = 0x55 + (pixels ^ 0x55);
+ break;
+ case REPAPER_INVERSE: /* B -> N, W -> B (New) */
+ pixels = 0x55 | ((pixels ^ 0x55) << 1);
+ break;
+ case REPAPER_NORMAL: /* B -> B, W -> W (New) */
+ pixels = 0xaa | pixels;
+ break;
+ }
+
+ pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55);
+ *(*pp)++ = pixels;
+ } else {
+ *(*pp)++ = fixed_value;
+ }
+ }
+}
+
+/* interleave bits: (byte)76543210 -> (16 bit).7.6.5.4.3.2.1 */
+static inline u16 repaper_interleave_bits(u16 value)
+{
+ value = (value | (value << 4)) & 0x0f0f;
+ value = (value | (value << 2)) & 0x3333;
+ value = (value | (value << 1)) & 0x5555;
+
+ return value;
+}
+
+/* pixels on display are numbered from 1 */
+static void repaper_all_pixels(struct repaper_epd *epd, u8 **pp,
+ const u8 *data, u8 fixed_value, const u8 *mask,
+ enum repaper_stage stage)
+{
+ unsigned int b;
+
+ for (b = epd->width / 8; b > 0; b--) {
+ if (data) {
+ u16 pixels = repaper_interleave_bits(data[b - 1]);
+ u16 pixel_mask = 0xffff;
+
+ if (mask) {
+ pixel_mask = repaper_interleave_bits(mask[b - 1]);
+
+ pixel_mask = (pixel_mask ^ pixels) & 0x5555;
+ pixel_mask |= pixel_mask << 1;
+ }
+
+ switch (stage) {
+ case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
+ pixels = 0xaaaa | (pixels ^ 0x5555);
+ break;
+ case REPAPER_WHITE: /* B -> N, W -> W (Current) */
+ pixels = 0x5555 + (pixels ^ 0x5555);
+ break;
+ case REPAPER_INVERSE: /* B -> N, W -> B (New) */
+ pixels = 0x5555 | ((pixels ^ 0x5555) << 1);
+ break;
+ case REPAPER_NORMAL: /* B -> B, W -> W (New) */
+ pixels = 0xaaaa | pixels;
+ break;
+ }
+
+ pixels = (pixels & pixel_mask) | (~pixel_mask & 0x5555);
+ *(*pp)++ = pixels >> 8;
+ *(*pp)++ = pixels;
+ } else {
+ *(*pp)++ = fixed_value;
+ *(*pp)++ = fixed_value;
+ }
+ }
+}
+
+/* output one line of scan and data bytes to the display */
+static void repaper_one_line(struct repaper_epd *epd, unsigned int line,
+ const u8 *data, u8 fixed_value, const u8 *mask,
+ enum repaper_stage stage)
+{
+ u8 *p = epd->line_buffer;
+ unsigned int b;
+
+ repaper_spi_mosi_low(epd->spi);
+
+ if (epd->pre_border_byte)
+ *p++ = 0x00;
+
+ if (epd->middle_scan) {
+ /* data bytes */
+ repaper_odd_pixels(epd, &p, data, fixed_value, mask, stage);
+
+ /* scan line */
+ for (b = epd->bytes_per_scan; b > 0; b--) {
+ if (line / 4 == b - 1)
+ *p++ = 0x03 << (2 * (line & 0x03));
+ else
+ *p++ = 0x00;
+ }
+
+ /* data bytes */
+ repaper_even_pixels(epd, &p, data, fixed_value, mask, stage);
+ } else {
+ /*
+ * even scan line, but as lines on display are numbered from 1,
+ * line: 1,3,5,...
+ */
+ for (b = 0; b < epd->bytes_per_scan; b++) {
+ if (0 != (line & 0x01) && line / 8 == b)
+ *p++ = 0xc0 >> (line & 0x06);
+ else
+ *p++ = 0x00;
+ }
+
+ /* data bytes */
+ repaper_all_pixels(epd, &p, data, fixed_value, mask, stage);
+
+ /*
+ * odd scan line, but as lines on display are numbered from 1,
+ * line: 0,2,4,6,...
+ */
+ for (b = epd->bytes_per_scan; b > 0; b--) {
+ if (0 == (line & 0x01) && line / 8 == b - 1)
+ *p++ = 0x03 << (line & 0x06);
+ else
+ *p++ = 0x00;
+ }
+ }
+
+ switch (epd->border_byte) {
+ case REPAPER_BORDER_BYTE_NONE:
+ break;
+
+ case REPAPER_BORDER_BYTE_ZERO:
+ *p++ = 0x00;
+ break;
+
+ case REPAPER_BORDER_BYTE_SET:
+ switch (stage) {
+ case REPAPER_COMPENSATE:
+ case REPAPER_WHITE:
+ case REPAPER_INVERSE:
+ *p++ = 0x00;
+ break;
+ case REPAPER_NORMAL:
+ *p++ = 0xaa;
+ break;
+ }
+ break;
+ }
+
+ repaper_write_buf(epd->spi, 0x0a, epd->line_buffer,
+ p - epd->line_buffer);
+
+ /* Output data to panel */
+ repaper_write_val(epd->spi, 0x02, 0x07);
+
+ repaper_spi_mosi_low(epd->spi);
+}
+
+static void repaper_frame_fixed(struct repaper_epd *epd, u8 fixed_value,
+ enum repaper_stage stage)
+{
+ unsigned int line;
+
+ for (line = 0; line < epd->height; line++)
+ repaper_one_line(epd, line, NULL, fixed_value, NULL, stage);
+}
+
+static void repaper_frame_data(struct repaper_epd *epd, const u8 *image,
+ const u8 *mask, enum repaper_stage stage)
+{
+ unsigned int line;
+
+ if (!mask) {
+ for (line = 0; line < epd->height; line++) {
+ repaper_one_line(epd, line,
+ &image[line * (epd->width / 8)],
+ 0, NULL, stage);
+ }
+ } else {
+ for (line = 0; line < epd->height; line++) {
+ size_t n = line * epd->width / 8;
+
+ repaper_one_line(epd, line, &image[n], 0, &mask[n],
+ stage);
+ }
+ }
+}
+
+static void repaper_frame_fixed_repeat(struct repaper_epd *epd, u8 fixed_value,
+ enum repaper_stage stage)
+{
+ u64 start = local_clock();
+ u64 end = start + (epd->factored_stage_time * 1000 * 1000);
+
+ do {
+ repaper_frame_fixed(epd, fixed_value, stage);
+ } while (local_clock() < end);
+}
+
+static void repaper_frame_data_repeat(struct repaper_epd *epd, const u8 *image,
+ const u8 *mask, enum repaper_stage stage)
+{
+ u64 start = local_clock();
+ u64 end = start + (epd->factored_stage_time * 1000 * 1000);
+
+ do {
+ repaper_frame_data(epd, image, mask, stage);
+ } while (local_clock() < end);
+}
+
+static void repaper_get_temperature(struct repaper_epd *epd)
+{
+ int ret, temperature = 0;
+ unsigned int factor10x;
+
+ if (!epd->thermal)
+ return;
+
+ ret = thermal_zone_get_temp(epd->thermal, &temperature);
+ if (ret) {
+ DRM_DEV_ERROR(&epd->spi->dev, "Failed to get temperature (%d)\n", ret);
+ return;
+ }
+
+ temperature /= 1000;
+
+ if (temperature <= -10)
+ factor10x = 170;
+ else if (temperature <= -5)
+ factor10x = 120;
+ else if (temperature <= 5)
+ factor10x = 80;
+ else if (temperature <= 10)
+ factor10x = 40;
+ else if (temperature <= 15)
+ factor10x = 30;
+ else if (temperature <= 20)
+ factor10x = 20;
+ else if (temperature <= 40)
+ factor10x = 10;
+ else
+ factor10x = 7;
+
+ epd->factored_stage_time = epd->stage_time * factor10x / 10;
+}
+
+static void repaper_gray8_to_mono_reversed(u8 *buf, u32 width, u32 height)
+{
+ u8 *gray8 = buf, *mono = buf;
+ int y, xb, i;
+
+ for (y = 0; y < height; y++)
+ for (xb = 0; xb < width / 8; xb++) {
+ u8 byte = 0x00;
+
+ for (i = 0; i < 8; i++) {
+ int x = xb * 8 + i;
+
+ byte >>= 1;
+ if (gray8[y * width + x] >> 7)
+ byte |= BIT(7);
+ }
+ *mono++ = byte;
+ }
+}
+
+static int repaper_fb_dirty(struct drm_framebuffer *fb)
+{
+ struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+ struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
+ struct repaper_epd *epd = drm_to_epd(fb->dev);
+ struct drm_rect clip;
+ int idx, ret = 0;
+ u8 *buf = NULL;
+
+ if (!epd->enabled)
+ return 0;
+
+ if (!drm_dev_enter(fb->dev, &idx))
+ return -ENODEV;
+
+ /* repaper can't do partial updates */
+ clip.x1 = 0;
+ clip.x2 = fb->width;
+ clip.y1 = 0;
+ clip.y2 = fb->height;
+
+ repaper_get_temperature(epd);
+
+ DRM_DEBUG("Flushing [FB:%d] st=%ums\n", fb->base.id,
+ epd->factored_stage_time);
+
+ buf = kmalloc_array(fb->width, fb->height, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto out_exit;
+ }
+
+ if (import_attach) {
+ ret = dma_buf_begin_cpu_access(import_attach->dmabuf,
+ DMA_FROM_DEVICE);
+ if (ret)
+ goto out_free;
+ }
+
+ drm_fb_xrgb8888_to_gray8(buf, cma_obj->vaddr, fb, &clip);
+
+ if (import_attach) {
+ ret = dma_buf_end_cpu_access(import_attach->dmabuf,
+ DMA_FROM_DEVICE);
+ if (ret)
+ goto out_free;
+ }
+
+ repaper_gray8_to_mono_reversed(buf, fb->width, fb->height);
+
+ if (epd->partial) {
+ repaper_frame_data_repeat(epd, buf, epd->current_frame,
+ REPAPER_NORMAL);
+ } else if (epd->cleared) {
+ repaper_frame_data_repeat(epd, epd->current_frame, NULL,
+ REPAPER_COMPENSATE);
+ repaper_frame_data_repeat(epd, epd->current_frame, NULL,
+ REPAPER_WHITE);
+ repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);
+ repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);
+
+ epd->partial = true;
+ } else {
+ /* Clear display (anything -> white) */
+ repaper_frame_fixed_repeat(epd, 0xff, REPAPER_COMPENSATE);
+ repaper_frame_fixed_repeat(epd, 0xff, REPAPER_WHITE);
+ repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_INVERSE);
+ repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_NORMAL);
+
+ /* Assuming a clear (white) screen output an image */
+ repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_COMPENSATE);
+ repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_WHITE);
+ repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);
+ repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);
+
+ epd->cleared = true;
+ epd->partial = true;
+ }
+
+ memcpy(epd->current_frame, buf, fb->width * fb->height / 8);
+
+ /*
+ * An extra frame write is needed if pixels are set in the bottom line,
+ * or else grey lines rises up from the pixels
+ */
+ if (epd->pre_border_byte) {
+ unsigned int x;
+
+ for (x = 0; x < (fb->width / 8); x++)
+ if (buf[x + (fb->width * (fb->height - 1) / 8)]) {
+ repaper_frame_data_repeat(epd, buf,
+ epd->current_frame,
+ REPAPER_NORMAL);
+ break;
+ }
+ }
+
+out_free:
+ kfree(buf);
+out_exit:
+ drm_dev_exit(idx);
+
+ return ret;
+}
+
+static void power_off(struct repaper_epd *epd)
+{
+ /* Turn off power and all signals */
+ gpiod_set_value_cansleep(epd->reset, 0);
+ gpiod_set_value_cansleep(epd->panel_on, 0);
+ if (epd->border)
+ gpiod_set_value_cansleep(epd->border, 0);
+
+ /* Ensure SPI MOSI and CLOCK are Low before CS Low */
+ repaper_spi_mosi_low(epd->spi);
+
+ /* Discharge pulse */
+ gpiod_set_value_cansleep(epd->discharge, 1);
+ msleep(150);
+ gpiod_set_value_cansleep(epd->discharge, 0);
+}
+
+static void repaper_pipe_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);
+ struct spi_device *spi = epd->spi;
+ struct device *dev = &spi->dev;
+ bool dc_ok = false;
+ int i, ret, idx;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* Power up sequence */
+ gpiod_set_value_cansleep(epd->reset, 0);
+ gpiod_set_value_cansleep(epd->panel_on, 0);
+ gpiod_set_value_cansleep(epd->discharge, 0);
+ if (epd->border)
+ gpiod_set_value_cansleep(epd->border, 0);
+ repaper_spi_mosi_low(spi);
+ usleep_range(5000, 10000);
+
+ gpiod_set_value_cansleep(epd->panel_on, 1);
+ /*
+ * This delay comes from the repaper.org userspace driver, it's not
+ * mentioned in the datasheet.
+ */
+ usleep_range(10000, 15000);
+ gpiod_set_value_cansleep(epd->reset, 1);
+ if (epd->border)
+ gpiod_set_value_cansleep(epd->border, 1);
+ usleep_range(5000, 10000);
+ gpiod_set_value_cansleep(epd->reset, 0);
+ usleep_range(5000, 10000);
+ gpiod_set_value_cansleep(epd->reset, 1);
+ usleep_range(5000, 10000);
+
+ /* Wait for COG to become ready */
+ for (i = 100; i > 0; i--) {
+ if (!gpiod_get_value_cansleep(epd->busy))
+ break;
+
+ usleep_range(10, 100);
+ }
+
+ if (!i) {
+ DRM_DEV_ERROR(dev, "timeout waiting for panel to become ready.\n");
+ power_off(epd);
+ goto out_exit;
+ }
+
+ repaper_read_id(spi);
+ ret = repaper_read_id(spi);
+ if (ret != REPAPER_RID_G2_COG_ID) {
+ if (ret < 0)
+ dev_err(dev, "failed to read chip (%d)\n", ret);
+ else
+ dev_err(dev, "wrong COG ID 0x%02x\n", ret);
+ power_off(epd);
+ goto out_exit;
+ }
+
+ /* Disable OE */
+ repaper_write_val(spi, 0x02, 0x40);
+
+ ret = repaper_read_val(spi, 0x0f);
+ if (ret < 0 || !(ret & 0x80)) {
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret);
+ else
+ DRM_DEV_ERROR(dev, "panel is reported broken\n");
+ power_off(epd);
+ goto out_exit;
+ }
+
+ /* Power saving mode */
+ repaper_write_val(spi, 0x0b, 0x02);
+ /* Channel select */
+ repaper_write_buf(spi, 0x01, epd->channel_select, 8);
+ /* High power mode osc */
+ repaper_write_val(spi, 0x07, 0xd1);
+ /* Power setting */
+ repaper_write_val(spi, 0x08, 0x02);
+ /* Vcom level */
+ repaper_write_val(spi, 0x09, 0xc2);
+ /* Power setting */
+ repaper_write_val(spi, 0x04, 0x03);
+ /* Driver latch on */
+ repaper_write_val(spi, 0x03, 0x01);
+ /* Driver latch off */
+ repaper_write_val(spi, 0x03, 0x00);
+ usleep_range(5000, 10000);
+
+ /* Start chargepump */
+ for (i = 0; i < 4; ++i) {
+ /* Charge pump positive voltage on - VGH/VDL on */
+ repaper_write_val(spi, 0x05, 0x01);
+ msleep(240);
+
+ /* Charge pump negative voltage on - VGL/VDL on */
+ repaper_write_val(spi, 0x05, 0x03);
+ msleep(40);
+
+ /* Charge pump Vcom on - Vcom driver on */
+ repaper_write_val(spi, 0x05, 0x0f);
+ msleep(40);
+
+ /* check DC/DC */
+ ret = repaper_read_val(spi, 0x0f);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret);
+ power_off(epd);
+ goto out_exit;
+ }
+
+ if (ret & 0x40) {
+ dc_ok = true;
+ break;
+ }
+ }
+
+ if (!dc_ok) {
+ DRM_DEV_ERROR(dev, "dc/dc failed\n");
+ power_off(epd);
+ goto out_exit;
+ }
+
+ /*
+ * Output enable to disable
+ * The userspace driver sets this to 0x04, but the datasheet says 0x06
+ */
+ repaper_write_val(spi, 0x02, 0x04);
+
+ epd->enabled = true;
+ epd->partial = false;
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static void repaper_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+ struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);
+ struct spi_device *spi = epd->spi;
+ unsigned int line;
+
+ /*
+ * This callback is not protected by drm_dev_enter/exit since we want to
+ * turn off the display on regular driver unload. It's highly unlikely
+ * that the underlying SPI controller is gone should this be called after
+ * unplug.
+ */
+
+ if (!epd->enabled)
+ return;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ epd->enabled = false;
+
+ /* Nothing frame */
+ for (line = 0; line < epd->height; line++)
+ repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
+ REPAPER_COMPENSATE);
+
+ /* 2.7" */
+ if (epd->border) {
+ /* Dummy line */
+ repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
+ REPAPER_COMPENSATE);
+ msleep(25);
+ gpiod_set_value_cansleep(epd->border, 0);
+ msleep(200);
+ gpiod_set_value_cansleep(epd->border, 1);
+ } else {
+ /* Border dummy line */
+ repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
+ REPAPER_NORMAL);
+ msleep(200);
+ }
+
+ /* not described in datasheet */
+ repaper_write_val(spi, 0x0b, 0x00);
+ /* Latch reset turn on */
+ repaper_write_val(spi, 0x03, 0x01);
+ /* Power off charge pump Vcom */
+ repaper_write_val(spi, 0x05, 0x03);
+ /* Power off charge pump neg voltage */
+ repaper_write_val(spi, 0x05, 0x01);
+ msleep(120);
+ /* Discharge internal */
+ repaper_write_val(spi, 0x04, 0x80);
+ /* turn off all charge pumps */
+ repaper_write_val(spi, 0x05, 0x00);
+ /* Turn off osc */
+ repaper_write_val(spi, 0x07, 0x01);
+ msleep(50);
+
+ power_off(epd);
+}
+
+static void repaper_pipe_update(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *old_state)
+{
+ struct drm_plane_state *state = pipe->plane.state;
+ struct drm_crtc *crtc = &pipe->crtc;
+ struct drm_rect rect;
+
+ if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+ repaper_fb_dirty(state->fb);
+
+ if (crtc->state->event) {
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ crtc->state->event = NULL;
+ }
+}
+
+static const struct drm_simple_display_pipe_funcs repaper_pipe_funcs = {
+ .enable = repaper_pipe_enable,
+ .disable = repaper_pipe_disable,
+ .update = repaper_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static int repaper_connector_get_modes(struct drm_connector *connector)
+{
+ struct repaper_epd *epd = drm_to_epd(connector->dev);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(connector->dev, epd->mode);
+ if (!mode) {
+ DRM_ERROR("Failed to duplicate mode\n");
+ return 0;
+ }
+
+ drm_mode_set_name(mode);
+ mode->type |= DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ connector->display_info.width_mm = mode->width_mm;
+ connector->display_info.height_mm = mode->height_mm;
+
+ return 1;
+}
+
+static const struct drm_connector_helper_funcs repaper_connector_hfuncs = {
+ .get_modes = repaper_connector_get_modes,
+};
+
+static const struct drm_connector_funcs repaper_connector_funcs = {
+ .reset = drm_atomic_helper_connector_reset,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static const struct drm_mode_config_funcs repaper_mode_config_funcs = {
+ .fb_create = drm_gem_fb_create_with_dirty,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+static void repaper_release(struct drm_device *drm)
+{
+ struct repaper_epd *epd = drm_to_epd(drm);
+
+ DRM_DEBUG_DRIVER("\n");
+
+ drm_mode_config_cleanup(drm);
+ drm_dev_fini(drm);
+ kfree(epd);
+}
+
+static const uint32_t repaper_formats[] = {
+ DRM_FORMAT_XRGB8888,
+};
+
+static const struct drm_display_mode repaper_e1144cs021_mode = {
+ DRM_SIMPLE_MODE(128, 96, 29, 22),
+};
+
+static const u8 repaper_e1144cs021_cs[] = { 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x0f, 0xff, 0x00 };
+
+static const struct drm_display_mode repaper_e1190cs021_mode = {
+ DRM_SIMPLE_MODE(144, 128, 36, 32),
+};
+
+static const u8 repaper_e1190cs021_cs[] = { 0x00, 0x00, 0x00, 0x03,
+ 0xfc, 0x00, 0x00, 0xff };
+
+static const struct drm_display_mode repaper_e2200cs021_mode = {
+ DRM_SIMPLE_MODE(200, 96, 46, 22),
+};
+
+static const u8 repaper_e2200cs021_cs[] = { 0x00, 0x00, 0x00, 0x00,
+ 0x01, 0xff, 0xe0, 0x00 };
+
+static const struct drm_display_mode repaper_e2271cs021_mode = {
+ DRM_SIMPLE_MODE(264, 176, 57, 38),
+};
+
+static const u8 repaper_e2271cs021_cs[] = { 0x00, 0x00, 0x00, 0x7f,
+ 0xff, 0xfe, 0x00, 0x00 };
+
+DEFINE_DRM_GEM_CMA_FOPS(repaper_fops);
+
+static struct drm_driver repaper_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &repaper_fops,
+ .release = repaper_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .name = "repaper",
+ .desc = "Pervasive Displays RePaper e-ink panels",
+ .date = "20170405",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id repaper_of_match[] = {
+ { .compatible = "pervasive,e1144cs021", .data = (void *)E1144CS021 },
+ { .compatible = "pervasive,e1190cs021", .data = (void *)E1190CS021 },
+ { .compatible = "pervasive,e2200cs021", .data = (void *)E2200CS021 },
+ { .compatible = "pervasive,e2271cs021", .data = (void *)E2271CS021 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, repaper_of_match);
+
+static const struct spi_device_id repaper_id[] = {
+ { "e1144cs021", E1144CS021 },
+ { "e1190cs021", E1190CS021 },
+ { "e2200cs021", E2200CS021 },
+ { "e2271cs021", E2271CS021 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, repaper_id);
+
+static int repaper_probe(struct spi_device *spi)
+{
+ const struct drm_display_mode *mode;
+ const struct spi_device_id *spi_id;
+ const struct of_device_id *match;
+ struct device *dev = &spi->dev;
+ enum repaper_model model;
+ const char *thermal_zone;
+ struct repaper_epd *epd;
+ size_t line_buffer_size;
+ struct drm_device *drm;
+ int ret;
+
+ match = of_match_device(repaper_of_match, dev);
+ if (match) {
+ model = (enum repaper_model)match->data;
+ } else {
+ spi_id = spi_get_device_id(spi);
+ model = spi_id->driver_data;
+ }
+
+ /* The SPI device is used to allocate dma memory */
+ if (!dev->coherent_dma_mask) {
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_warn(dev, "Failed to set dma mask %d\n", ret);
+ return ret;
+ }
+ }
+
+ epd = kzalloc(sizeof(*epd), GFP_KERNEL);
+ if (!epd)
+ return -ENOMEM;
+
+ drm = &epd->drm;
+
+ ret = devm_drm_dev_init(dev, drm, &repaper_driver);
+ if (ret) {
+ kfree(epd);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+ drm->mode_config.funcs = &repaper_mode_config_funcs;
+
+ epd->spi = spi;
+
+ epd->panel_on = devm_gpiod_get(dev, "panel-on", GPIOD_OUT_LOW);
+ if (IS_ERR(epd->panel_on)) {
+ ret = PTR_ERR(epd->panel_on);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'panel-on'\n");
+ return ret;
+ }
+
+ epd->discharge = devm_gpiod_get(dev, "discharge", GPIOD_OUT_LOW);
+ if (IS_ERR(epd->discharge)) {
+ ret = PTR_ERR(epd->discharge);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'discharge'\n");
+ return ret;
+ }
+
+ epd->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(epd->reset)) {
+ ret = PTR_ERR(epd->reset);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+ return ret;
+ }
+
+ epd->busy = devm_gpiod_get(dev, "busy", GPIOD_IN);
+ if (IS_ERR(epd->busy)) {
+ ret = PTR_ERR(epd->busy);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'busy'\n");
+ return ret;
+ }
+
+ if (!device_property_read_string(dev, "pervasive,thermal-zone",
+ &thermal_zone)) {
+ epd->thermal = thermal_zone_get_zone_by_name(thermal_zone);
+ if (IS_ERR(epd->thermal)) {
+ DRM_DEV_ERROR(dev, "Failed to get thermal zone: %s\n", thermal_zone);
+ return PTR_ERR(epd->thermal);
+ }
+ }
+
+ switch (model) {
+ case E1144CS021:
+ mode = &repaper_e1144cs021_mode;
+ epd->channel_select = repaper_e1144cs021_cs;
+ epd->stage_time = 480;
+ epd->bytes_per_scan = 96 / 4;
+ epd->middle_scan = true; /* data-scan-data */
+ epd->pre_border_byte = false;
+ epd->border_byte = REPAPER_BORDER_BYTE_ZERO;
+ break;
+
+ case E1190CS021:
+ mode = &repaper_e1190cs021_mode;
+ epd->channel_select = repaper_e1190cs021_cs;
+ epd->stage_time = 480;
+ epd->bytes_per_scan = 128 / 4 / 2;
+ epd->middle_scan = false; /* scan-data-scan */
+ epd->pre_border_byte = false;
+ epd->border_byte = REPAPER_BORDER_BYTE_SET;
+ break;
+
+ case E2200CS021:
+ mode = &repaper_e2200cs021_mode;
+ epd->channel_select = repaper_e2200cs021_cs;
+ epd->stage_time = 480;
+ epd->bytes_per_scan = 96 / 4;
+ epd->middle_scan = true; /* data-scan-data */
+ epd->pre_border_byte = true;
+ epd->border_byte = REPAPER_BORDER_BYTE_NONE;
+ break;
+
+ case E2271CS021:
+ epd->border = devm_gpiod_get(dev, "border", GPIOD_OUT_LOW);
+ if (IS_ERR(epd->border)) {
+ ret = PTR_ERR(epd->border);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'border'\n");
+ return ret;
+ }
+
+ mode = &repaper_e2271cs021_mode;
+ epd->channel_select = repaper_e2271cs021_cs;
+ epd->stage_time = 630;
+ epd->bytes_per_scan = 176 / 4;
+ epd->middle_scan = true; /* data-scan-data */
+ epd->pre_border_byte = true;
+ epd->border_byte = REPAPER_BORDER_BYTE_NONE;
+ break;
+
+ default:
+ return -ENODEV;
+ }
+
+ epd->mode = mode;
+ epd->width = mode->hdisplay;
+ epd->height = mode->vdisplay;
+ epd->factored_stage_time = epd->stage_time;
+
+ line_buffer_size = 2 * epd->width / 8 + epd->bytes_per_scan + 2;
+ epd->line_buffer = devm_kzalloc(dev, line_buffer_size, GFP_KERNEL);
+ if (!epd->line_buffer)
+ return -ENOMEM;
+
+ epd->current_frame = devm_kzalloc(dev, epd->width * epd->height / 8,
+ GFP_KERNEL);
+ if (!epd->current_frame)
+ return -ENOMEM;
+
+ drm->mode_config.min_width = mode->hdisplay;
+ drm->mode_config.max_width = mode->hdisplay;
+ drm->mode_config.min_height = mode->vdisplay;
+ drm->mode_config.max_height = mode->vdisplay;
+
+ drm_connector_helper_add(&epd->connector, &repaper_connector_hfuncs);
+ ret = drm_connector_init(drm, &epd->connector, &repaper_connector_funcs,
+ DRM_MODE_CONNECTOR_SPI);
+ if (ret)
+ return ret;
+
+ ret = drm_simple_display_pipe_init(drm, &epd->pipe, &repaper_pipe_funcs,
+ repaper_formats, ARRAY_SIZE(repaper_formats),
+ NULL, &epd->connector);
+ if (ret)
+ return ret;
+
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, drm);
+
+ DRM_DEBUG_DRIVER("SPI speed: %uMHz\n", spi->max_speed_hz / 1000000);
+
+ drm_fbdev_generic_setup(drm, 0);
+
+ return 0;
+}
+
+static int repaper_remove(struct spi_device *spi)
+{
+ struct drm_device *drm = spi_get_drvdata(spi);
+
+ drm_dev_unplug(drm);
+ drm_atomic_helper_shutdown(drm);
+
+ return 0;
+}
+
+static void repaper_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver repaper_spi_driver = {
+ .driver = {
+ .name = "repaper",
+ .owner = THIS_MODULE,
+ .of_match_table = repaper_of_match,
+ },
+ .id_table = repaper_id,
+ .probe = repaper_probe,
+ .remove = repaper_remove,
+ .shutdown = repaper_shutdown,
+};
+module_spi_driver(repaper_spi_driver);
+
+MODULE_DESCRIPTION("Pervasive Displays RePaper DRM driver");
+MODULE_AUTHOR("Noralf Trønnes");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Sitronix ST7586 panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_rect.h>
+#include <drm/drm_vblank.h>
+
+/* controller-specific commands */
+#define ST7586_DISP_MODE_GRAY 0x38
+#define ST7586_DISP_MODE_MONO 0x39
+#define ST7586_ENABLE_DDRAM 0x3a
+#define ST7586_SET_DISP_DUTY 0xb0
+#define ST7586_SET_PART_DISP 0xb4
+#define ST7586_SET_NLINE_INV 0xb5
+#define ST7586_SET_VOP 0xc0
+#define ST7586_SET_BIAS_SYSTEM 0xc3
+#define ST7586_SET_BOOST_LEVEL 0xc4
+#define ST7586_SET_VOP_OFFSET 0xc7
+#define ST7586_ENABLE_ANALOG 0xd0
+#define ST7586_AUTO_READ_CTRL 0xd7
+#define ST7586_OTP_RW_CTRL 0xe0
+#define ST7586_OTP_CTRL_OUT 0xe1
+#define ST7586_OTP_READ 0xe3
+
+#define ST7586_DISP_CTRL_MX BIT(6)
+#define ST7586_DISP_CTRL_MY BIT(7)
+
+/*
+ * The ST7586 controller has an unusual pixel format where 2bpp grayscale is
+ * packed 3 pixels per byte with the first two pixels using 3 bits and the 3rd
+ * pixel using only 2 bits.
+ *
+ * | D7 | D6 | D5 || | || 2bpp |
+ * | (D4) | (D3) | (D2) || D1 | D0 || GRAY |
+ * +------+------+------++------+------++------+
+ * | 1 | 1 | 1 || 1 | 1 || 0 0 | black
+ * | 1 | 0 | 0 || 1 | 0 || 0 1 | dark gray
+ * | 0 | 1 | 0 || 0 | 1 || 1 0 | light gray
+ * | 0 | 0 | 0 || 0 | 0 || 1 1 | white
+ */
+
+static const u8 st7586_lookup[] = { 0x7, 0x4, 0x2, 0x0 };
+
+static void st7586_xrgb8888_to_gray332(u8 *dst, void *vaddr,
+ struct drm_framebuffer *fb,
+ struct drm_rect *clip)
+{
+ size_t len = (clip->x2 - clip->x1) * (clip->y2 - clip->y1);
+ unsigned int x, y;
+ u8 *src, *buf, val;
+
+ buf = kmalloc(len, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ drm_fb_xrgb8888_to_gray8(buf, vaddr, fb, clip);
+ src = buf;
+
+ for (y = clip->y1; y < clip->y2; y++) {
+ for (x = clip->x1; x < clip->x2; x += 3) {
+ val = st7586_lookup[*src++ >> 6] << 5;
+ val |= st7586_lookup[*src++ >> 6] << 2;
+ val |= st7586_lookup[*src++ >> 6] >> 1;
+ *dst++ = val;
+ }
+ }
+
+ kfree(buf);
+}
+
+static int st7586_buf_copy(void *dst, struct drm_framebuffer *fb,
+ struct drm_rect *clip)
+{
+ struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+ struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
+ void *src = cma_obj->vaddr;
+ int ret = 0;
+
+ if (import_attach) {
+ ret = dma_buf_begin_cpu_access(import_attach->dmabuf,
+ DMA_FROM_DEVICE);
+ if (ret)
+ return ret;
+ }
+
+ st7586_xrgb8888_to_gray332(dst, src, fb, clip);
+
+ if (import_attach)
+ ret = dma_buf_end_cpu_access(import_attach->dmabuf,
+ DMA_FROM_DEVICE);
+
+ return ret;
+}
+
+static void st7586_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ int start, end, idx, ret = 0;
+
+ if (!dbidev->enabled)
+ return;
+
+ if (!drm_dev_enter(fb->dev, &idx))
+ return;
+
+ /* 3 pixels per byte, so grow clip to nearest multiple of 3 */
+ rect->x1 = rounddown(rect->x1, 3);
+ rect->x2 = roundup(rect->x2, 3);
+
+ DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
+
+ ret = st7586_buf_copy(dbidev->tx_buf, fb, rect);
+ if (ret)
+ goto err_msg;
+
+ /* Pixels are packed 3 per byte */
+ start = rect->x1 / 3;
+ end = rect->x2 / 3;
+
+ mipi_dbi_command(dbi, MIPI_DCS_SET_COLUMN_ADDRESS,
+ (start >> 8) & 0xFF, start & 0xFF,
+ (end >> 8) & 0xFF, (end - 1) & 0xFF);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PAGE_ADDRESS,
+ (rect->y1 >> 8) & 0xFF, rect->y1 & 0xFF,
+ (rect->y2 >> 8) & 0xFF, (rect->y2 - 1) & 0xFF);
+
+ ret = mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START,
+ (u8 *)dbidev->tx_buf,
+ (end - start) * (rect->y2 - rect->y1));
+err_msg:
+ if (ret)
+ dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
+
+ drm_dev_exit(idx);
+}
+
+static void st7586_pipe_update(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *old_state)
+{
+ struct drm_plane_state *state = pipe->plane.state;
+ struct drm_crtc *crtc = &pipe->crtc;
+ struct drm_rect rect;
+
+ if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+ st7586_fb_dirty(state->fb, &rect);
+
+ if (crtc->state->event) {
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ crtc->state->event = NULL;
+ }
+}
+
+static void st7586_pipe_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct drm_framebuffer *fb = plane_state->fb;
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ struct drm_rect rect = {
+ .x1 = 0,
+ .x2 = fb->width,
+ .y1 = 0,
+ .y2 = fb->height,
+ };
+ int idx, ret;
+ u8 addr_mode;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ ret = mipi_dbi_poweron_reset(dbidev);
+ if (ret)
+ goto out_exit;
+
+ mipi_dbi_command(dbi, ST7586_AUTO_READ_CTRL, 0x9f);
+ mipi_dbi_command(dbi, ST7586_OTP_RW_CTRL, 0x00);
+
+ msleep(10);
+
+ mipi_dbi_command(dbi, ST7586_OTP_READ);
+
+ msleep(20);
+
+ mipi_dbi_command(dbi, ST7586_OTP_CTRL_OUT);
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+
+ msleep(50);
+
+ mipi_dbi_command(dbi, ST7586_SET_VOP_OFFSET, 0x00);
+ mipi_dbi_command(dbi, ST7586_SET_VOP, 0xe3, 0x00);
+ mipi_dbi_command(dbi, ST7586_SET_BIAS_SYSTEM, 0x02);
+ mipi_dbi_command(dbi, ST7586_SET_BOOST_LEVEL, 0x04);
+ mipi_dbi_command(dbi, ST7586_ENABLE_ANALOG, 0x1d);
+ mipi_dbi_command(dbi, ST7586_SET_NLINE_INV, 0x00);
+ mipi_dbi_command(dbi, ST7586_DISP_MODE_GRAY);
+ mipi_dbi_command(dbi, ST7586_ENABLE_DDRAM, 0x02);
+
+ switch (dbidev->rotation) {
+ default:
+ addr_mode = 0x00;
+ break;
+ case 90:
+ addr_mode = ST7586_DISP_CTRL_MY;
+ break;
+ case 180:
+ addr_mode = ST7586_DISP_CTRL_MX | ST7586_DISP_CTRL_MY;
+ break;
+ case 270:
+ addr_mode = ST7586_DISP_CTRL_MX;
+ break;
+ }
+ mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+
+ mipi_dbi_command(dbi, ST7586_SET_DISP_DUTY, 0x7f);
+ mipi_dbi_command(dbi, ST7586_SET_PART_DISP, 0xa0);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PARTIAL_AREA, 0x00, 0x00, 0x00, 0x77);
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE);
+
+ msleep(100);
+
+ dbidev->enabled = true;
+ st7586_fb_dirty(fb, &rect);
+
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static void st7586_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+
+ /*
+ * This callback is not protected by drm_dev_enter/exit since we want to
+ * turn off the display on regular driver unload. It's highly unlikely
+ * that the underlying SPI controller is gone should this be called after
+ * unplug.
+ */
+
+ DRM_DEBUG_KMS("\n");
+
+ if (!dbidev->enabled)
+ return;
+
+ mipi_dbi_command(&dbidev->dbi, MIPI_DCS_SET_DISPLAY_OFF);
+ dbidev->enabled = false;
+}
+
+static const u32 st7586_formats[] = {
+ DRM_FORMAT_XRGB8888,
+};
+
+static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = {
+ .enable = st7586_pipe_enable,
+ .disable = st7586_pipe_disable,
+ .update = st7586_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode st7586_mode = {
+ DRM_SIMPLE_MODE(178, 128, 37, 27),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(st7586_fops);
+
+static struct drm_driver st7586_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &st7586_fops,
+ .release = mipi_dbi_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .debugfs_init = mipi_dbi_debugfs_init,
+ .name = "st7586",
+ .desc = "Sitronix ST7586",
+ .date = "20170801",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id st7586_of_match[] = {
+ { .compatible = "lego,ev3-lcd" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st7586_of_match);
+
+static const struct spi_device_id st7586_id[] = {
+ { "ev3-lcd", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, st7586_id);
+
+static int st7586_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct mipi_dbi_dev *dbidev;
+ struct drm_device *drm;
+ struct mipi_dbi *dbi;
+ struct gpio_desc *a0;
+ u32 rotation = 0;
+ size_t bufsize;
+ int ret;
+
+ dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+ if (!dbidev)
+ return -ENOMEM;
+
+ dbi = &dbidev->dbi;
+ drm = &dbidev->drm;
+ ret = devm_drm_dev_init(dev, drm, &st7586_driver);
+ if (ret) {
+ kfree(dbidev);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+
+ bufsize = (st7586_mode.vdisplay + 2) / 3 * st7586_mode.hdisplay;
+
+ dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(dbi->reset)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+ return PTR_ERR(dbi->reset);
+ }
+
+ a0 = devm_gpiod_get(dev, "a0", GPIOD_OUT_LOW);
+ if (IS_ERR(a0)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'a0'\n");
+ return PTR_ERR(a0);
+ }
+
+ device_property_read_u32(dev, "rotation", &rotation);
+
+ ret = mipi_dbi_spi_init(spi, dbi, a0);
+ if (ret)
+ return ret;
+
+ /* Cannot read from this controller via SPI */
+ dbi->read_commands = NULL;
+
+ ret = mipi_dbi_dev_init_with_formats(dbidev, &st7586_pipe_funcs,
+ st7586_formats, ARRAY_SIZE(st7586_formats),
+ &st7586_mode, rotation, bufsize);
+ if (ret)
+ return ret;
+
+ /*
+ * we are using 8-bit data, so we are not actually swapping anything,
+ * but setting mipi->swap_bytes makes mipi_dbi_typec3_command() do the
+ * right thing and not use 16-bit transfers (which results in swapped
+ * bytes on little-endian systems and causes out of order data to be
+ * sent to the display).
+ */
+ dbi->swap_bytes = true;
+
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, drm);
+
+ drm_fbdev_generic_setup(drm, 0);
+
+ return 0;
+}
+
+static int st7586_remove(struct spi_device *spi)
+{
+ struct drm_device *drm = spi_get_drvdata(spi);
+
+ drm_dev_unplug(drm);
+ drm_atomic_helper_shutdown(drm);
+
+ return 0;
+}
+
+static void st7586_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver st7586_spi_driver = {
+ .driver = {
+ .name = "st7586",
+ .owner = THIS_MODULE,
+ .of_match_table = st7586_of_match,
+ },
+ .id_table = st7586_id,
+ .probe = st7586_probe,
+ .remove = st7586_remove,
+ .shutdown = st7586_shutdown,
+};
+module_spi_driver(st7586_spi_driver);
+
+MODULE_DESCRIPTION("Sitronix ST7586 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for Sitronix ST7735R panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+
+#define ST7735R_FRMCTR1 0xb1
+#define ST7735R_FRMCTR2 0xb2
+#define ST7735R_FRMCTR3 0xb3
+#define ST7735R_INVCTR 0xb4
+#define ST7735R_PWCTR1 0xc0
+#define ST7735R_PWCTR2 0xc1
+#define ST7735R_PWCTR3 0xc2
+#define ST7735R_PWCTR4 0xc3
+#define ST7735R_PWCTR5 0xc4
+#define ST7735R_VMCTR1 0xc5
+#define ST7735R_GAMCTRP1 0xe0
+#define ST7735R_GAMCTRN1 0xe1
+
+#define ST7735R_MY BIT(7)
+#define ST7735R_MX BIT(6)
+#define ST7735R_MV BIT(5)
+
+static void jd_t18003_t01_pipe_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ int ret, idx;
+ u8 addr_mode;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ ret = mipi_dbi_poweron_reset(dbidev);
+ if (ret)
+ goto out_exit;
+
+ msleep(150);
+
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
+ msleep(500);
+
+ mipi_dbi_command(dbi, ST7735R_FRMCTR1, 0x01, 0x2c, 0x2d);
+ mipi_dbi_command(dbi, ST7735R_FRMCTR2, 0x01, 0x2c, 0x2d);
+ mipi_dbi_command(dbi, ST7735R_FRMCTR3, 0x01, 0x2c, 0x2d, 0x01, 0x2c,
+ 0x2d);
+ mipi_dbi_command(dbi, ST7735R_INVCTR, 0x07);
+ mipi_dbi_command(dbi, ST7735R_PWCTR1, 0xa2, 0x02, 0x84);
+ mipi_dbi_command(dbi, ST7735R_PWCTR2, 0xc5);
+ mipi_dbi_command(dbi, ST7735R_PWCTR3, 0x0a, 0x00);
+ mipi_dbi_command(dbi, ST7735R_PWCTR4, 0x8a, 0x2a);
+ mipi_dbi_command(dbi, ST7735R_PWCTR5, 0x8a, 0xee);
+ mipi_dbi_command(dbi, ST7735R_VMCTR1, 0x0e);
+ mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE);
+ switch (dbidev->rotation) {
+ default:
+ addr_mode = ST7735R_MX | ST7735R_MY;
+ break;
+ case 90:
+ addr_mode = ST7735R_MX | ST7735R_MV;
+ break;
+ case 180:
+ addr_mode = 0;
+ break;
+ case 270:
+ addr_mode = ST7735R_MY | ST7735R_MV;
+ break;
+ }
+ mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
+ MIPI_DCS_PIXEL_FMT_16BIT);
+ mipi_dbi_command(dbi, ST7735R_GAMCTRP1, 0x02, 0x1c, 0x07, 0x12, 0x37,
+ 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2b, 0x39, 0x00, 0x01,
+ 0x03, 0x10);
+ mipi_dbi_command(dbi, ST7735R_GAMCTRN1, 0x03, 0x1d, 0x07, 0x06, 0x2e,
+ 0x2c, 0x29, 0x2d, 0x2e, 0x2e, 0x37, 0x3f, 0x00, 0x00,
+ 0x02, 0x10);
+ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+
+ msleep(100);
+
+ mipi_dbi_command(dbi, MIPI_DCS_ENTER_NORMAL_MODE);
+
+ msleep(20);
+
+ mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static const struct drm_simple_display_pipe_funcs jd_t18003_t01_pipe_funcs = {
+ .enable = jd_t18003_t01_pipe_enable,
+ .disable = mipi_dbi_pipe_disable,
+ .update = mipi_dbi_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode jd_t18003_t01_mode = {
+ DRM_SIMPLE_MODE(128, 160, 28, 35),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(st7735r_fops);
+
+static struct drm_driver st7735r_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &st7735r_fops,
+ .release = mipi_dbi_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .debugfs_init = mipi_dbi_debugfs_init,
+ .name = "st7735r",
+ .desc = "Sitronix ST7735R",
+ .date = "20171128",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id st7735r_of_match[] = {
+ { .compatible = "jianda,jd-t18003-t01" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, st7735r_of_match);
+
+static const struct spi_device_id st7735r_id[] = {
+ { "jd-t18003-t01", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, st7735r_id);
+
+static int st7735r_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct mipi_dbi_dev *dbidev;
+ struct drm_device *drm;
+ struct mipi_dbi *dbi;
+ struct gpio_desc *dc;
+ u32 rotation = 0;
+ int ret;
+
+ dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+ if (!dbidev)
+ return -ENOMEM;
+
+ dbi = &dbidev->dbi;
+ drm = &dbidev->drm;
+ ret = devm_drm_dev_init(dev, drm, &st7735r_driver);
+ if (ret) {
+ kfree(dbidev);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+
+ dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(dbi->reset)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+ return PTR_ERR(dbi->reset);
+ }
+
+ dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW);
+ if (IS_ERR(dc)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+ return PTR_ERR(dc);
+ }
+
+ dbidev->backlight = devm_of_find_backlight(dev);
+ if (IS_ERR(dbidev->backlight))
+ return PTR_ERR(dbidev->backlight);
+
+ device_property_read_u32(dev, "rotation", &rotation);
+
+ ret = mipi_dbi_spi_init(spi, dbi, dc);
+ if (ret)
+ return ret;
+
+ /* Cannot read from Adafruit 1.8" display via SPI */
+ dbi->read_commands = NULL;
+
+ ret = mipi_dbi_dev_init(dbidev, &jd_t18003_t01_pipe_funcs, &jd_t18003_t01_mode, rotation);
+ if (ret)
+ return ret;
+
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, drm);
+
+ drm_fbdev_generic_setup(drm, 0);
+
+ return 0;
+}
+
+static int st7735r_remove(struct spi_device *spi)
+{
+ struct drm_device *drm = spi_get_drvdata(spi);
+
+ drm_dev_unplug(drm);
+ drm_atomic_helper_shutdown(drm);
+
+ return 0;
+}
+
+static void st7735r_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver st7735r_spi_driver = {
+ .driver = {
+ .name = "st7735r",
+ .owner = THIS_MODULE,
+ .of_match_table = st7735r_of_match,
+ },
+ .id_table = st7735r_id,
+ .probe = st7735r_probe,
+ .remove = st7735r_remove,
+ .shutdown = st7735r_shutdown,
+};
+module_spi_driver(st7735r_spi_driver);
+
+MODULE_DESCRIPTION("Sitronix ST7735R DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-config TINYDRM_HX8357D
- tristate "DRM support for HX8357D display panels"
- depends on DRM && SPI
- select DRM_KMS_HELPER
- select DRM_KMS_CMA_HELPER
- select DRM_MIPI_DBI
- select BACKLIGHT_CLASS_DEVICE
- help
- DRM driver for the following HX8357D panels:
- * YX350HV15-T 3.5" 340x350 TFT (Adafruit 3.5")
-
- If M is selected the module will be called hx8357d.
-
-config TINYDRM_ILI9225
- tristate "DRM support for ILI9225 display panels"
- depends on DRM && SPI
- select DRM_KMS_HELPER
- select DRM_KMS_CMA_HELPER
- select DRM_MIPI_DBI
- help
- DRM driver for the following Ilitek ILI9225 panels:
- * No-name 2.2" color screen module
-
- If M is selected the module will be called ili9225.
-
-config TINYDRM_ILI9341
- tristate "DRM support for ILI9341 display panels"
- depends on DRM && SPI
- select DRM_KMS_HELPER
- select DRM_KMS_CMA_HELPER
- select DRM_MIPI_DBI
- select BACKLIGHT_CLASS_DEVICE
- help
- DRM driver for the following Ilitek ILI9341 panels:
- * YX240QV29-T 2.4" 240x320 TFT (Adafruit 2.4")
-
- If M is selected the module will be called ili9341.
-
-config TINYDRM_MI0283QT
- tristate "DRM support for MI0283QT"
- depends on DRM && SPI
- select DRM_KMS_HELPER
- select DRM_KMS_CMA_HELPER
- select DRM_MIPI_DBI
- select BACKLIGHT_CLASS_DEVICE
- help
- DRM driver for the Multi-Inno MI0283QT display panel
- If M is selected the module will be called mi0283qt.
-
-config TINYDRM_REPAPER
- tristate "DRM support for Pervasive Displays RePaper panels (V231)"
- depends on DRM && SPI
- select DRM_KMS_HELPER
- select DRM_KMS_CMA_HELPER
- depends on THERMAL || !THERMAL
- help
- DRM driver for the following Pervasive Displays panels:
- 1.44" TFT EPD Panel (E1144CS021)
- 1.90" TFT EPD Panel (E1190CS021)
- 2.00" TFT EPD Panel (E2200CS021)
- 2.71" TFT EPD Panel (E2271CS021)
-
- If M is selected the module will be called repaper.
-
-config TINYDRM_ST7586
- tristate "DRM support for Sitronix ST7586 display panels"
- depends on DRM && SPI
- select DRM_KMS_HELPER
- select DRM_KMS_CMA_HELPER
- select DRM_MIPI_DBI
- help
- DRM driver for the following Sitronix ST7586 panels:
- * LEGO MINDSTORMS EV3
-
- If M is selected the module will be called st7586.
-
-config TINYDRM_ST7735R
- tristate "DRM support for Sitronix ST7735R display panels"
- depends on DRM && SPI
- select DRM_KMS_HELPER
- select DRM_KMS_CMA_HELPER
- select DRM_MIPI_DBI
- select BACKLIGHT_CLASS_DEVICE
- help
- DRM driver Sitronix ST7735R with one of the following LCDs:
- * JD-T18003-T01 1.8" 128x160 TFT
-
- If M is selected the module will be called st7735r.
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-
-obj-$(CONFIG_TINYDRM_HX8357D) += hx8357d.o
-obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o
-obj-$(CONFIG_TINYDRM_ILI9341) += ili9341.o
-obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o
-obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o
-obj-$(CONFIG_TINYDRM_ST7586) += st7586.o
-obj-$(CONFIG_TINYDRM_ST7735R) += st7735r.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * DRM driver for the HX8357D LCD controller
- *
- * Copyright 2018 Broadcom
- * Copyright 2018 David Lechner <david@lechnology.com>
- * Copyright 2016 Noralf Trønnes
- * Copyright (C) 2015 Adafruit Industries
- * Copyright (C) 2013 Christian Vogelgsang
- */
-
-#include <linux/backlight.h>
-#include <linux/delay.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/property.h>
-#include <linux/spi/spi.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_mipi_dbi.h>
-#include <drm/drm_modeset_helper.h>
-#include <video/mipi_display.h>
-
-#define HX8357D_SETOSC 0xb0
-#define HX8357D_SETPOWER 0xb1
-#define HX8357D_SETRGB 0xb3
-#define HX8357D_SETCYC 0xb3
-#define HX8357D_SETCOM 0xb6
-#define HX8357D_SETEXTC 0xb9
-#define HX8357D_SETSTBA 0xc0
-#define HX8357D_SETPANEL 0xcc
-#define HX8357D_SETGAMMA 0xe0
-
-#define HX8357D_MADCTL_MY 0x80
-#define HX8357D_MADCTL_MX 0x40
-#define HX8357D_MADCTL_MV 0x20
-#define HX8357D_MADCTL_ML 0x10
-#define HX8357D_MADCTL_RGB 0x00
-#define HX8357D_MADCTL_BGR 0x08
-#define HX8357D_MADCTL_MH 0x04
-
-static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
- struct drm_crtc_state *crtc_state,
- struct drm_plane_state *plane_state)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
- struct mipi_dbi *dbi = &dbidev->dbi;
- u8 addr_mode;
- int ret, idx;
-
- if (!drm_dev_enter(pipe->crtc.dev, &idx))
- return;
-
- DRM_DEBUG_KMS("\n");
-
- ret = mipi_dbi_poweron_conditional_reset(dbidev);
- if (ret < 0)
- goto out_exit;
- if (ret == 1)
- goto out_enable;
-
- /* setextc */
- mipi_dbi_command(dbi, HX8357D_SETEXTC, 0xFF, 0x83, 0x57);
- msleep(150);
-
- /* setRGB which also enables SDO */
- mipi_dbi_command(dbi, HX8357D_SETRGB, 0x00, 0x00, 0x06, 0x06);
-
- /* -1.52V */
- mipi_dbi_command(dbi, HX8357D_SETCOM, 0x25);
-
- /* Normal mode 70Hz, Idle mode 55 Hz */
- mipi_dbi_command(dbi, HX8357D_SETOSC, 0x68);
-
- /* Set Panel - BGR, Gate direction swapped */
- mipi_dbi_command(dbi, HX8357D_SETPANEL, 0x05);
-
- mipi_dbi_command(dbi, HX8357D_SETPOWER,
- 0x00, /* Not deep standby */
- 0x15, /* BT */
- 0x1C, /* VSPR */
- 0x1C, /* VSNR */
- 0x83, /* AP */
- 0xAA); /* FS */
-
- mipi_dbi_command(dbi, HX8357D_SETSTBA,
- 0x50, /* OPON normal */
- 0x50, /* OPON idle */
- 0x01, /* STBA */
- 0x3C, /* STBA */
- 0x1E, /* STBA */
- 0x08); /* GEN */
-
- mipi_dbi_command(dbi, HX8357D_SETCYC,
- 0x02, /* NW 0x02 */
- 0x40, /* RTN */
- 0x00, /* DIV */
- 0x2A, /* DUM */
- 0x2A, /* DUM */
- 0x0D, /* GDON */
- 0x78); /* GDOFF */
-
- mipi_dbi_command(dbi, HX8357D_SETGAMMA,
- 0x02,
- 0x0A,
- 0x11,
- 0x1d,
- 0x23,
- 0x35,
- 0x41,
- 0x4b,
- 0x4b,
- 0x42,
- 0x3A,
- 0x27,
- 0x1B,
- 0x08,
- 0x09,
- 0x03,
- 0x02,
- 0x0A,
- 0x11,
- 0x1d,
- 0x23,
- 0x35,
- 0x41,
- 0x4b,
- 0x4b,
- 0x42,
- 0x3A,
- 0x27,
- 0x1B,
- 0x08,
- 0x09,
- 0x03,
- 0x00,
- 0x01);
-
- /* 16 bit */
- mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
- MIPI_DCS_PIXEL_FMT_16BIT);
-
- /* TE off */
- mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_ON, 0x00);
-
- /* tear line */
- mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02);
-
- /* Exit Sleep */
- mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
- msleep(150);
-
- /* display on */
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
- usleep_range(5000, 7000);
-
-out_enable:
- switch (dbidev->rotation) {
- default:
- addr_mode = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
- break;
- case 90:
- addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
- break;
- case 180:
- addr_mode = 0;
- break;
- case 270:
- addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
- break;
- }
- mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
- mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
-out_exit:
- drm_dev_exit(idx);
-}
-
-static const struct drm_simple_display_pipe_funcs hx8357d_pipe_funcs = {
- .enable = yx240qv29_enable,
- .disable = mipi_dbi_pipe_disable,
- .update = mipi_dbi_pipe_update,
- .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
-};
-
-static const struct drm_display_mode yx350hv15_mode = {
- DRM_SIMPLE_MODE(320, 480, 60, 75),
-};
-
-DEFINE_DRM_GEM_CMA_FOPS(hx8357d_fops);
-
-static struct drm_driver hx8357d_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- .fops = &hx8357d_fops,
- .release = mipi_dbi_release,
- DRM_GEM_CMA_VMAP_DRIVER_OPS,
- .debugfs_init = mipi_dbi_debugfs_init,
- .name = "hx8357d",
- .desc = "HX8357D",
- .date = "20181023",
- .major = 1,
- .minor = 0,
-};
-
-static const struct of_device_id hx8357d_of_match[] = {
- { .compatible = "adafruit,yx350hv15" },
- { }
-};
-MODULE_DEVICE_TABLE(of, hx8357d_of_match);
-
-static const struct spi_device_id hx8357d_id[] = {
- { "yx350hv15", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(spi, hx8357d_id);
-
-static int hx8357d_probe(struct spi_device *spi)
-{
- struct device *dev = &spi->dev;
- struct mipi_dbi_dev *dbidev;
- struct drm_device *drm;
- struct gpio_desc *dc;
- u32 rotation = 0;
- int ret;
-
- dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
- if (!dbidev)
- return -ENOMEM;
-
- drm = &dbidev->drm;
- ret = devm_drm_dev_init(dev, drm, &hx8357d_driver);
- if (ret) {
- kfree(dbidev);
- return ret;
- }
-
- drm_mode_config_init(drm);
-
- dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW);
- if (IS_ERR(dc)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
- return PTR_ERR(dc);
- }
-
- dbidev->backlight = devm_of_find_backlight(dev);
- if (IS_ERR(dbidev->backlight))
- return PTR_ERR(dbidev->backlight);
-
- device_property_read_u32(dev, "rotation", &rotation);
-
- ret = mipi_dbi_spi_init(spi, &dbidev->dbi, dc);
- if (ret)
- return ret;
-
- ret = mipi_dbi_dev_init(dbidev, &hx8357d_pipe_funcs, &yx350hv15_mode, rotation);
- if (ret)
- return ret;
-
- drm_mode_config_reset(drm);
-
- ret = drm_dev_register(drm, 0);
- if (ret)
- return ret;
-
- spi_set_drvdata(spi, drm);
-
- drm_fbdev_generic_setup(drm, 0);
-
- return 0;
-}
-
-static int hx8357d_remove(struct spi_device *spi)
-{
- struct drm_device *drm = spi_get_drvdata(spi);
-
- drm_dev_unplug(drm);
- drm_atomic_helper_shutdown(drm);
-
- return 0;
-}
-
-static void hx8357d_shutdown(struct spi_device *spi)
-{
- drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
-static struct spi_driver hx8357d_spi_driver = {
- .driver = {
- .name = "hx8357d",
- .of_match_table = hx8357d_of_match,
- },
- .id_table = hx8357d_id,
- .probe = hx8357d_probe,
- .remove = hx8357d_remove,
- .shutdown = hx8357d_shutdown,
-};
-module_spi_driver(hx8357d_spi_driver);
-
-MODULE_DESCRIPTION("HX8357D DRM driver");
-MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DRM driver for Ilitek ILI9225 panels
- *
- * Copyright 2017 David Lechner <david@lechnology.com>
- *
- * Some code copied from mipi-dbi.c
- * Copyright 2016 Noralf Trønnes
- */
-
-#include <linux/delay.h>
-#include <linux/dma-buf.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/property.h>
-#include <linux/spi/spi.h>
-#include <video/mipi_display.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_damage_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_cma_helper.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_fourcc.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_mipi_dbi.h>
-#include <drm/drm_rect.h>
-#include <drm/drm_vblank.h>
-
-#define ILI9225_DRIVER_READ_CODE 0x00
-#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
-#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02
-#define ILI9225_ENTRY_MODE 0x03
-#define ILI9225_DISPLAY_CONTROL_1 0x07
-#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08
-#define ILI9225_FRAME_CYCLE_CONTROL 0x0b
-#define ILI9225_INTERFACE_CONTROL 0x0c
-#define ILI9225_OSCILLATION_CONTROL 0x0f
-#define ILI9225_POWER_CONTROL_1 0x10
-#define ILI9225_POWER_CONTROL_2 0x11
-#define ILI9225_POWER_CONTROL_3 0x12
-#define ILI9225_POWER_CONTROL_4 0x13
-#define ILI9225_POWER_CONTROL_5 0x14
-#define ILI9225_VCI_RECYCLING 0x15
-#define ILI9225_RAM_ADDRESS_SET_1 0x20
-#define ILI9225_RAM_ADDRESS_SET_2 0x21
-#define ILI9225_WRITE_DATA_TO_GRAM 0x22
-#define ILI9225_SOFTWARE_RESET 0x28
-#define ILI9225_GATE_SCAN_CONTROL 0x30
-#define ILI9225_VERTICAL_SCROLL_1 0x31
-#define ILI9225_VERTICAL_SCROLL_2 0x32
-#define ILI9225_VERTICAL_SCROLL_3 0x33
-#define ILI9225_PARTIAL_DRIVING_POS_1 0x34
-#define ILI9225_PARTIAL_DRIVING_POS_2 0x35
-#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36
-#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37
-#define ILI9225_VERT_WINDOW_ADDR_1 0x38
-#define ILI9225_VERT_WINDOW_ADDR_2 0x39
-#define ILI9225_GAMMA_CONTROL_1 0x50
-#define ILI9225_GAMMA_CONTROL_2 0x51
-#define ILI9225_GAMMA_CONTROL_3 0x52
-#define ILI9225_GAMMA_CONTROL_4 0x53
-#define ILI9225_GAMMA_CONTROL_5 0x54
-#define ILI9225_GAMMA_CONTROL_6 0x55
-#define ILI9225_GAMMA_CONTROL_7 0x56
-#define ILI9225_GAMMA_CONTROL_8 0x57
-#define ILI9225_GAMMA_CONTROL_9 0x58
-#define ILI9225_GAMMA_CONTROL_10 0x59
-
-static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
-{
- u8 par[2] = { data >> 8, data & 0xff };
-
- return mipi_dbi_command_buf(dbi, cmd, par, 2);
-}
-
-static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
-{
- struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
- unsigned int height = rect->y2 - rect->y1;
- unsigned int width = rect->x2 - rect->x1;
- struct mipi_dbi *dbi = &dbidev->dbi;
- bool swap = dbi->swap_bytes;
- u16 x_start, y_start;
- u16 x1, x2, y1, y2;
- int idx, ret = 0;
- bool full;
- void *tr;
-
- if (!dbidev->enabled)
- return;
-
- if (!drm_dev_enter(fb->dev, &idx))
- return;
-
- full = width == fb->width && height == fb->height;
-
- DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
-
- if (!dbi->dc || !full || swap ||
- fb->format->format == DRM_FORMAT_XRGB8888) {
- tr = dbidev->tx_buf;
- ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap);
- if (ret)
- goto err_msg;
- } else {
- tr = cma_obj->vaddr;
- }
-
- switch (dbidev->rotation) {
- default:
- x1 = rect->x1;
- x2 = rect->x2 - 1;
- y1 = rect->y1;
- y2 = rect->y2 - 1;
- x_start = x1;
- y_start = y1;
- break;
- case 90:
- x1 = rect->y1;
- x2 = rect->y2 - 1;
- y1 = fb->width - rect->x2;
- y2 = fb->width - rect->x1 - 1;
- x_start = x1;
- y_start = y2;
- break;
- case 180:
- x1 = fb->width - rect->x2;
- x2 = fb->width - rect->x1 - 1;
- y1 = fb->height - rect->y2;
- y2 = fb->height - rect->y1 - 1;
- x_start = x2;
- y_start = y2;
- break;
- case 270:
- x1 = fb->height - rect->y2;
- x2 = fb->height - rect->y1 - 1;
- y1 = rect->x1;
- y2 = rect->x2 - 1;
- x_start = x2;
- y_start = y1;
- break;
- }
-
- ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
- ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
- ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
- ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
-
- ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
- ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
-
- ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
- width * height * 2);
-err_msg:
- if (ret)
- dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
-
- drm_dev_exit(idx);
-}
-
-static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
- struct drm_plane_state *old_state)
-{
- struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
- struct drm_rect rect;
-
- if (drm_atomic_helper_damage_merged(old_state, state, &rect))
- ili9225_fb_dirty(state->fb, &rect);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- spin_unlock_irq(&crtc->dev->event_lock);
- crtc->state->event = NULL;
- }
-}
-
-static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
- struct drm_crtc_state *crtc_state,
- struct drm_plane_state *plane_state)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
- struct drm_framebuffer *fb = plane_state->fb;
- struct device *dev = pipe->crtc.dev->dev;
- struct mipi_dbi *dbi = &dbidev->dbi;
- struct drm_rect rect = {
- .x1 = 0,
- .x2 = fb->width,
- .y1 = 0,
- .y2 = fb->height,
- };
- int ret, idx;
- u8 am_id;
-
- if (!drm_dev_enter(pipe->crtc.dev, &idx))
- return;
-
- DRM_DEBUG_KMS("\n");
-
- mipi_dbi_hw_reset(dbi);
-
- /*
- * There don't seem to be two example init sequences that match, so
- * using the one from the popular Arduino library for this display.
- * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
- */
-
- ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
- if (ret) {
- DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
- goto out_exit;
- }
- ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
-
- msleep(40);
-
- ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
-
- msleep(10);
-
- ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
-
- msleep(50);
-
- switch (dbidev->rotation) {
- default:
- am_id = 0x30;
- break;
- case 90:
- am_id = 0x18;
- break;
- case 180:
- am_id = 0x00;
- break;
- case 270:
- am_id = 0x28;
- break;
- }
- ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
- ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
- ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
- ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
- ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
- ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
- ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
- ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
- ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
- ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
- ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
-
- ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
- ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
- ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
- ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
- ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
- ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
-
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
- ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
-
- ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
-
- msleep(50);
-
- ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
-
- dbidev->enabled = true;
- ili9225_fb_dirty(fb, &rect);
-out_exit:
- drm_dev_exit(idx);
-}
-
-static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
- struct mipi_dbi *dbi = &dbidev->dbi;
-
- DRM_DEBUG_KMS("\n");
-
- /*
- * This callback is not protected by drm_dev_enter/exit since we want to
- * turn off the display on regular driver unload. It's highly unlikely
- * that the underlying SPI controller is gone should this be called after
- * unplug.
- */
-
- if (!dbidev->enabled)
- return;
-
- ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
- msleep(50);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
- msleep(50);
- ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
-
- dbidev->enabled = false;
-}
-
-static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
- size_t num)
-{
- struct spi_device *spi = dbi->spi;
- unsigned int bpw = 8;
- u32 speed_hz;
- int ret;
-
- gpiod_set_value_cansleep(dbi->dc, 0);
- speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
- ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
- if (ret || !num)
- return ret;
-
- if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
- bpw = 16;
-
- gpiod_set_value_cansleep(dbi->dc, 1);
- speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
-
- return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
-}
-
-static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
- .enable = ili9225_pipe_enable,
- .disable = ili9225_pipe_disable,
- .update = ili9225_pipe_update,
- .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
-};
-
-static const struct drm_display_mode ili9225_mode = {
- DRM_SIMPLE_MODE(176, 220, 35, 44),
-};
-
-DEFINE_DRM_GEM_CMA_FOPS(ili9225_fops);
-
-static struct drm_driver ili9225_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- .fops = &ili9225_fops,
- .release = mipi_dbi_release,
- DRM_GEM_CMA_VMAP_DRIVER_OPS,
- .name = "ili9225",
- .desc = "Ilitek ILI9225",
- .date = "20171106",
- .major = 1,
- .minor = 0,
-};
-
-static const struct of_device_id ili9225_of_match[] = {
- { .compatible = "vot,v220hf01a-t" },
- {},
-};
-MODULE_DEVICE_TABLE(of, ili9225_of_match);
-
-static const struct spi_device_id ili9225_id[] = {
- { "v220hf01a-t", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(spi, ili9225_id);
-
-static int ili9225_probe(struct spi_device *spi)
-{
- struct device *dev = &spi->dev;
- struct mipi_dbi_dev *dbidev;
- struct drm_device *drm;
- struct mipi_dbi *dbi;
- struct gpio_desc *rs;
- u32 rotation = 0;
- int ret;
-
- dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
- if (!dbidev)
- return -ENOMEM;
-
- dbi = &dbidev->dbi;
- drm = &dbidev->drm;
- ret = devm_drm_dev_init(dev, drm, &ili9225_driver);
- if (ret) {
- kfree(dbidev);
- return ret;
- }
-
- drm_mode_config_init(drm);
-
- dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(dbi->reset)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
- return PTR_ERR(dbi->reset);
- }
-
- rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
- if (IS_ERR(rs)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'rs'\n");
- return PTR_ERR(rs);
- }
-
- device_property_read_u32(dev, "rotation", &rotation);
-
- ret = mipi_dbi_spi_init(spi, dbi, rs);
- if (ret)
- return ret;
-
- /* override the command function set in mipi_dbi_spi_init() */
- dbi->command = ili9225_dbi_command;
-
- ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
- if (ret)
- return ret;
-
- drm_mode_config_reset(drm);
-
- ret = drm_dev_register(drm, 0);
- if (ret)
- return ret;
-
- spi_set_drvdata(spi, drm);
-
- drm_fbdev_generic_setup(drm, 0);
-
- return 0;
-}
-
-static int ili9225_remove(struct spi_device *spi)
-{
- struct drm_device *drm = spi_get_drvdata(spi);
-
- drm_dev_unplug(drm);
- drm_atomic_helper_shutdown(drm);
-
- return 0;
-}
-
-static void ili9225_shutdown(struct spi_device *spi)
-{
- drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
-static struct spi_driver ili9225_spi_driver = {
- .driver = {
- .name = "ili9225",
- .owner = THIS_MODULE,
- .of_match_table = ili9225_of_match,
- },
- .id_table = ili9225_id,
- .probe = ili9225_probe,
- .remove = ili9225_remove,
- .shutdown = ili9225_shutdown,
-};
-module_spi_driver(ili9225_spi_driver);
-
-MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
-MODULE_AUTHOR("David Lechner <david@lechnology.com>");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * DRM driver for Ilitek ILI9341 panels
- *
- * Copyright 2018 David Lechner <david@lechnology.com>
- *
- * Based on mi0283qt.c:
- * Copyright 2016 Noralf Trønnes
- */
-
-#include <linux/backlight.h>
-#include <linux/delay.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/property.h>
-#include <linux/spi/spi.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_mipi_dbi.h>
-#include <drm/drm_modeset_helper.h>
-#include <video/mipi_display.h>
-
-#define ILI9341_FRMCTR1 0xb1
-#define ILI9341_DISCTRL 0xb6
-#define ILI9341_ETMOD 0xb7
-
-#define ILI9341_PWCTRL1 0xc0
-#define ILI9341_PWCTRL2 0xc1
-#define ILI9341_VMCTRL1 0xc5
-#define ILI9341_VMCTRL2 0xc7
-#define ILI9341_PWCTRLA 0xcb
-#define ILI9341_PWCTRLB 0xcf
-
-#define ILI9341_PGAMCTRL 0xe0
-#define ILI9341_NGAMCTRL 0xe1
-#define ILI9341_DTCTRLA 0xe8
-#define ILI9341_DTCTRLB 0xea
-#define ILI9341_PWRSEQ 0xed
-
-#define ILI9341_EN3GAM 0xf2
-#define ILI9341_PUMPCTRL 0xf7
-
-#define ILI9341_MADCTL_BGR BIT(3)
-#define ILI9341_MADCTL_MV BIT(5)
-#define ILI9341_MADCTL_MX BIT(6)
-#define ILI9341_MADCTL_MY BIT(7)
-
-static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
- struct drm_crtc_state *crtc_state,
- struct drm_plane_state *plane_state)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
- struct mipi_dbi *dbi = &dbidev->dbi;
- u8 addr_mode;
- int ret, idx;
-
- if (!drm_dev_enter(pipe->crtc.dev, &idx))
- return;
-
- DRM_DEBUG_KMS("\n");
-
- ret = mipi_dbi_poweron_conditional_reset(dbidev);
- if (ret < 0)
- goto out_exit;
- if (ret == 1)
- goto out_enable;
-
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
-
- mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
- mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
- mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
- mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
- mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
- mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
-
- /* Power Control */
- mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
- mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
- /* VCOM */
- mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
- mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);
-
- /* Memory Access Control */
- mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
-
- /* Frame Rate */
- mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
-
- /* Gamma */
- mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
- mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
- mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
- 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
- 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
- mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
- 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
- 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
-
- /* DDRAM */
- mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
-
- /* Display */
- mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
- mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
- msleep(100);
-
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
- msleep(100);
-
-out_enable:
- switch (dbidev->rotation) {
- default:
- addr_mode = ILI9341_MADCTL_MX;
- break;
- case 90:
- addr_mode = ILI9341_MADCTL_MV;
- break;
- case 180:
- addr_mode = ILI9341_MADCTL_MY;
- break;
- case 270:
- addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
- ILI9341_MADCTL_MX;
- break;
- }
- addr_mode |= ILI9341_MADCTL_BGR;
- mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
- mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
-out_exit:
- drm_dev_exit(idx);
-}
-
-static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
- .enable = yx240qv29_enable,
- .disable = mipi_dbi_pipe_disable,
- .update = mipi_dbi_pipe_update,
- .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
-};
-
-static const struct drm_display_mode yx240qv29_mode = {
- DRM_SIMPLE_MODE(240, 320, 37, 49),
-};
-
-DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);
-
-static struct drm_driver ili9341_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- .fops = &ili9341_fops,
- .release = mipi_dbi_release,
- DRM_GEM_CMA_VMAP_DRIVER_OPS,
- .debugfs_init = mipi_dbi_debugfs_init,
- .name = "ili9341",
- .desc = "Ilitek ILI9341",
- .date = "20180514",
- .major = 1,
- .minor = 0,
-};
-
-static const struct of_device_id ili9341_of_match[] = {
- { .compatible = "adafruit,yx240qv29" },
- { }
-};
-MODULE_DEVICE_TABLE(of, ili9341_of_match);
-
-static const struct spi_device_id ili9341_id[] = {
- { "yx240qv29", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(spi, ili9341_id);
-
-static int ili9341_probe(struct spi_device *spi)
-{
- struct device *dev = &spi->dev;
- struct mipi_dbi_dev *dbidev;
- struct drm_device *drm;
- struct mipi_dbi *dbi;
- struct gpio_desc *dc;
- u32 rotation = 0;
- int ret;
-
- dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
- if (!dbidev)
- return -ENOMEM;
-
- dbi = &dbidev->dbi;
- drm = &dbidev->drm;
- ret = devm_drm_dev_init(dev, drm, &ili9341_driver);
- if (ret) {
- kfree(dbidev);
- return ret;
- }
-
- drm_mode_config_init(drm);
-
- dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(dbi->reset)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
- return PTR_ERR(dbi->reset);
- }
-
- dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
- if (IS_ERR(dc)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
- return PTR_ERR(dc);
- }
-
- dbidev->backlight = devm_of_find_backlight(dev);
- if (IS_ERR(dbidev->backlight))
- return PTR_ERR(dbidev->backlight);
-
- device_property_read_u32(dev, "rotation", &rotation);
-
- ret = mipi_dbi_spi_init(spi, dbi, dc);
- if (ret)
- return ret;
-
- ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
- if (ret)
- return ret;
-
- drm_mode_config_reset(drm);
-
- ret = drm_dev_register(drm, 0);
- if (ret)
- return ret;
-
- spi_set_drvdata(spi, drm);
-
- drm_fbdev_generic_setup(drm, 0);
-
- return 0;
-}
-
-static int ili9341_remove(struct spi_device *spi)
-{
- struct drm_device *drm = spi_get_drvdata(spi);
-
- drm_dev_unplug(drm);
- drm_atomic_helper_shutdown(drm);
-
- return 0;
-}
-
-static void ili9341_shutdown(struct spi_device *spi)
-{
- drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
-static struct spi_driver ili9341_spi_driver = {
- .driver = {
- .name = "ili9341",
- .of_match_table = ili9341_of_match,
- },
- .id_table = ili9341_id,
- .probe = ili9341_probe,
- .remove = ili9341_remove,
- .shutdown = ili9341_shutdown,
-};
-module_spi_driver(ili9341_spi_driver);
-
-MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
-MODULE_AUTHOR("David Lechner <david@lechnology.com>");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DRM driver for Multi-Inno MI0283QT panels
- *
- * Copyright 2016 Noralf Trønnes
- */
-
-#include <linux/backlight.h>
-#include <linux/delay.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/property.h>
-#include <linux/regulator/consumer.h>
-#include <linux/spi/spi.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_mipi_dbi.h>
-#include <drm/drm_modeset_helper.h>
-#include <video/mipi_display.h>
-
-#define ILI9341_FRMCTR1 0xb1
-#define ILI9341_DISCTRL 0xb6
-#define ILI9341_ETMOD 0xb7
-
-#define ILI9341_PWCTRL1 0xc0
-#define ILI9341_PWCTRL2 0xc1
-#define ILI9341_VMCTRL1 0xc5
-#define ILI9341_VMCTRL2 0xc7
-#define ILI9341_PWCTRLA 0xcb
-#define ILI9341_PWCTRLB 0xcf
-
-#define ILI9341_PGAMCTRL 0xe0
-#define ILI9341_NGAMCTRL 0xe1
-#define ILI9341_DTCTRLA 0xe8
-#define ILI9341_DTCTRLB 0xea
-#define ILI9341_PWRSEQ 0xed
-
-#define ILI9341_EN3GAM 0xf2
-#define ILI9341_PUMPCTRL 0xf7
-
-#define ILI9341_MADCTL_BGR BIT(3)
-#define ILI9341_MADCTL_MV BIT(5)
-#define ILI9341_MADCTL_MX BIT(6)
-#define ILI9341_MADCTL_MY BIT(7)
-
-static void mi0283qt_enable(struct drm_simple_display_pipe *pipe,
- struct drm_crtc_state *crtc_state,
- struct drm_plane_state *plane_state)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
- struct mipi_dbi *dbi = &dbidev->dbi;
- u8 addr_mode;
- int ret, idx;
-
- if (!drm_dev_enter(pipe->crtc.dev, &idx))
- return;
-
- DRM_DEBUG_KMS("\n");
-
- ret = mipi_dbi_poweron_conditional_reset(dbidev);
- if (ret < 0)
- goto out_exit;
- if (ret == 1)
- goto out_enable;
-
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
-
- mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30);
- mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
- mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79);
- mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
- mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
- mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
-
- /* Power Control */
- mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x26);
- mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x11);
- /* VCOM */
- mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x35, 0x3e);
- mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0xbe);
-
- /* Memory Access Control */
- mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
-
- /* Frame Rate */
- mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
-
- /* Gamma */
- mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x08);
- mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
- mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
- 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,
- 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);
- mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
- 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,
- 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);
-
- /* DDRAM */
- mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
-
- /* Display */
- mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00);
- mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
- msleep(100);
-
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
- msleep(100);
-
-out_enable:
- /* The PiTFT (ili9340) has a hardware reset circuit that
- * resets only on power-on and not on each reboot through
- * a gpio like the rpi-display does.
- * As a result, we need to always apply the rotation value
- * regardless of the display "on/off" state.
- */
- switch (dbidev->rotation) {
- default:
- addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
- ILI9341_MADCTL_MX;
- break;
- case 90:
- addr_mode = ILI9341_MADCTL_MY;
- break;
- case 180:
- addr_mode = ILI9341_MADCTL_MV;
- break;
- case 270:
- addr_mode = ILI9341_MADCTL_MX;
- break;
- }
- addr_mode |= ILI9341_MADCTL_BGR;
- mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
- mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
-out_exit:
- drm_dev_exit(idx);
-}
-
-static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {
- .enable = mi0283qt_enable,
- .disable = mipi_dbi_pipe_disable,
- .update = mipi_dbi_pipe_update,
- .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
-};
-
-static const struct drm_display_mode mi0283qt_mode = {
- DRM_SIMPLE_MODE(320, 240, 58, 43),
-};
-
-DEFINE_DRM_GEM_CMA_FOPS(mi0283qt_fops);
-
-static struct drm_driver mi0283qt_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- .fops = &mi0283qt_fops,
- .release = mipi_dbi_release,
- DRM_GEM_CMA_VMAP_DRIVER_OPS,
- .debugfs_init = mipi_dbi_debugfs_init,
- .name = "mi0283qt",
- .desc = "Multi-Inno MI0283QT",
- .date = "20160614",
- .major = 1,
- .minor = 0,
-};
-
-static const struct of_device_id mi0283qt_of_match[] = {
- { .compatible = "multi-inno,mi0283qt" },
- {},
-};
-MODULE_DEVICE_TABLE(of, mi0283qt_of_match);
-
-static const struct spi_device_id mi0283qt_id[] = {
- { "mi0283qt", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(spi, mi0283qt_id);
-
-static int mi0283qt_probe(struct spi_device *spi)
-{
- struct device *dev = &spi->dev;
- struct mipi_dbi_dev *dbidev;
- struct drm_device *drm;
- struct mipi_dbi *dbi;
- struct gpio_desc *dc;
- u32 rotation = 0;
- int ret;
-
- dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
- if (!dbidev)
- return -ENOMEM;
-
- dbi = &dbidev->dbi;
- drm = &dbidev->drm;
- ret = devm_drm_dev_init(dev, drm, &mi0283qt_driver);
- if (ret) {
- kfree(dbidev);
- return ret;
- }
-
- drm_mode_config_init(drm);
-
- dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(dbi->reset)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
- return PTR_ERR(dbi->reset);
- }
-
- dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
- if (IS_ERR(dc)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
- return PTR_ERR(dc);
- }
-
- dbidev->regulator = devm_regulator_get(dev, "power");
- if (IS_ERR(dbidev->regulator))
- return PTR_ERR(dbidev->regulator);
-
- dbidev->backlight = devm_of_find_backlight(dev);
- if (IS_ERR(dbidev->backlight))
- return PTR_ERR(dbidev->backlight);
-
- device_property_read_u32(dev, "rotation", &rotation);
-
- ret = mipi_dbi_spi_init(spi, dbi, dc);
- if (ret)
- return ret;
-
- ret = mipi_dbi_dev_init(dbidev, &mi0283qt_pipe_funcs, &mi0283qt_mode, rotation);
- if (ret)
- return ret;
-
- drm_mode_config_reset(drm);
-
- ret = drm_dev_register(drm, 0);
- if (ret)
- return ret;
-
- spi_set_drvdata(spi, drm);
-
- drm_fbdev_generic_setup(drm, 0);
-
- return 0;
-}
-
-static int mi0283qt_remove(struct spi_device *spi)
-{
- struct drm_device *drm = spi_get_drvdata(spi);
-
- drm_dev_unplug(drm);
- drm_atomic_helper_shutdown(drm);
-
- return 0;
-}
-
-static void mi0283qt_shutdown(struct spi_device *spi)
-{
- drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
-static int __maybe_unused mi0283qt_pm_suspend(struct device *dev)
-{
- return drm_mode_config_helper_suspend(dev_get_drvdata(dev));
-}
-
-static int __maybe_unused mi0283qt_pm_resume(struct device *dev)
-{
- drm_mode_config_helper_resume(dev_get_drvdata(dev));
-
- return 0;
-}
-
-static const struct dev_pm_ops mi0283qt_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume)
-};
-
-static struct spi_driver mi0283qt_spi_driver = {
- .driver = {
- .name = "mi0283qt",
- .owner = THIS_MODULE,
- .of_match_table = mi0283qt_of_match,
- .pm = &mi0283qt_pm_ops,
- },
- .id_table = mi0283qt_id,
- .probe = mi0283qt_probe,
- .remove = mi0283qt_remove,
- .shutdown = mi0283qt_shutdown,
-};
-module_spi_driver(mi0283qt_spi_driver);
-
-MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");
-MODULE_AUTHOR("Noralf Trønnes");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DRM driver for Pervasive Displays RePaper branded e-ink panels
- *
- * Copyright 2013-2017 Pervasive Displays, Inc.
- * Copyright 2017 Noralf Trønnes
- *
- * The driver supports:
- * Material Film: Aurora Mb (V231)
- * Driver IC: G2 (eTC)
- *
- * The controller code was taken from the userspace driver:
- * https://github.com/repaper/gratis
- */
-
-#include <linux/delay.h>
-#include <linux/dma-buf.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/sched/clock.h>
-#include <linux/spi/spi.h>
-#include <linux/thermal.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_connector.h>
-#include <drm/drm_damage_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_cma_helper.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_format_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_modes.h>
-#include <drm/drm_rect.h>
-#include <drm/drm_vblank.h>
-#include <drm/drm_probe_helper.h>
-#include <drm/drm_simple_kms_helper.h>
-
-#define REPAPER_RID_G2_COG_ID 0x12
-
-enum repaper_model {
- E1144CS021 = 1,
- E1190CS021,
- E2200CS021,
- E2271CS021,
-};
-
-enum repaper_stage { /* Image pixel -> Display pixel */
- REPAPER_COMPENSATE, /* B -> W, W -> B (Current Image) */
- REPAPER_WHITE, /* B -> N, W -> W (Current Image) */
- REPAPER_INVERSE, /* B -> N, W -> B (New Image) */
- REPAPER_NORMAL /* B -> B, W -> W (New Image) */
-};
-
-enum repaper_epd_border_byte {
- REPAPER_BORDER_BYTE_NONE,
- REPAPER_BORDER_BYTE_ZERO,
- REPAPER_BORDER_BYTE_SET,
-};
-
-struct repaper_epd {
- struct drm_device drm;
- struct drm_simple_display_pipe pipe;
- const struct drm_display_mode *mode;
- struct drm_connector connector;
- struct spi_device *spi;
-
- struct gpio_desc *panel_on;
- struct gpio_desc *border;
- struct gpio_desc *discharge;
- struct gpio_desc *reset;
- struct gpio_desc *busy;
-
- struct thermal_zone_device *thermal;
-
- unsigned int height;
- unsigned int width;
- unsigned int bytes_per_scan;
- const u8 *channel_select;
- unsigned int stage_time;
- unsigned int factored_stage_time;
- bool middle_scan;
- bool pre_border_byte;
- enum repaper_epd_border_byte border_byte;
-
- u8 *line_buffer;
- void *current_frame;
-
- bool enabled;
- bool cleared;
- bool partial;
-};
-
-static inline struct repaper_epd *drm_to_epd(struct drm_device *drm)
-{
- return container_of(drm, struct repaper_epd, drm);
-}
-
-static int repaper_spi_transfer(struct spi_device *spi, u8 header,
- const void *tx, void *rx, size_t len)
-{
- void *txbuf = NULL, *rxbuf = NULL;
- struct spi_transfer tr[2] = {};
- u8 *headerbuf;
- int ret;
-
- headerbuf = kmalloc(1, GFP_KERNEL);
- if (!headerbuf)
- return -ENOMEM;
-
- headerbuf[0] = header;
- tr[0].tx_buf = headerbuf;
- tr[0].len = 1;
-
- /* Stack allocated tx? */
- if (tx && len <= 32) {
- txbuf = kmemdup(tx, len, GFP_KERNEL);
- if (!txbuf) {
- ret = -ENOMEM;
- goto out_free;
- }
- }
-
- if (rx) {
- rxbuf = kmalloc(len, GFP_KERNEL);
- if (!rxbuf) {
- ret = -ENOMEM;
- goto out_free;
- }
- }
-
- tr[1].tx_buf = txbuf ? txbuf : tx;
- tr[1].rx_buf = rxbuf;
- tr[1].len = len;
-
- ndelay(80);
- ret = spi_sync_transfer(spi, tr, 2);
- if (rx && !ret)
- memcpy(rx, rxbuf, len);
-
-out_free:
- kfree(headerbuf);
- kfree(txbuf);
- kfree(rxbuf);
-
- return ret;
-}
-
-static int repaper_write_buf(struct spi_device *spi, u8 reg,
- const u8 *buf, size_t len)
-{
- int ret;
-
- ret = repaper_spi_transfer(spi, 0x70, ®, NULL, 1);
- if (ret)
- return ret;
-
- return repaper_spi_transfer(spi, 0x72, buf, NULL, len);
-}
-
-static int repaper_write_val(struct spi_device *spi, u8 reg, u8 val)
-{
- return repaper_write_buf(spi, reg, &val, 1);
-}
-
-static int repaper_read_val(struct spi_device *spi, u8 reg)
-{
- int ret;
- u8 val;
-
- ret = repaper_spi_transfer(spi, 0x70, ®, NULL, 1);
- if (ret)
- return ret;
-
- ret = repaper_spi_transfer(spi, 0x73, NULL, &val, 1);
-
- return ret ? ret : val;
-}
-
-static int repaper_read_id(struct spi_device *spi)
-{
- int ret;
- u8 id;
-
- ret = repaper_spi_transfer(spi, 0x71, NULL, &id, 1);
-
- return ret ? ret : id;
-}
-
-static void repaper_spi_mosi_low(struct spi_device *spi)
-{
- const u8 buf[1] = { 0 };
-
- spi_write(spi, buf, 1);
-}
-
-/* pixels on display are numbered from 1 so even is actually bits 1,3,5,... */
-static void repaper_even_pixels(struct repaper_epd *epd, u8 **pp,
- const u8 *data, u8 fixed_value, const u8 *mask,
- enum repaper_stage stage)
-{
- unsigned int b;
-
- for (b = 0; b < (epd->width / 8); b++) {
- if (data) {
- u8 pixels = data[b] & 0xaa;
- u8 pixel_mask = 0xff;
- u8 p1, p2, p3, p4;
-
- if (mask) {
- pixel_mask = (mask[b] ^ pixels) & 0xaa;
- pixel_mask |= pixel_mask >> 1;
- }
-
- switch (stage) {
- case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
- pixels = 0xaa | ((pixels ^ 0xaa) >> 1);
- break;
- case REPAPER_WHITE: /* B -> N, W -> W (Current) */
- pixels = 0x55 + ((pixels ^ 0xaa) >> 1);
- break;
- case REPAPER_INVERSE: /* B -> N, W -> B (New) */
- pixels = 0x55 | (pixels ^ 0xaa);
- break;
- case REPAPER_NORMAL: /* B -> B, W -> W (New) */
- pixels = 0xaa | (pixels >> 1);
- break;
- }
-
- pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55);
- p1 = (pixels >> 6) & 0x03;
- p2 = (pixels >> 4) & 0x03;
- p3 = (pixels >> 2) & 0x03;
- p4 = (pixels >> 0) & 0x03;
- pixels = (p1 << 0) | (p2 << 2) | (p3 << 4) | (p4 << 6);
- *(*pp)++ = pixels;
- } else {
- *(*pp)++ = fixed_value;
- }
- }
-}
-
-/* pixels on display are numbered from 1 so odd is actually bits 0,2,4,... */
-static void repaper_odd_pixels(struct repaper_epd *epd, u8 **pp,
- const u8 *data, u8 fixed_value, const u8 *mask,
- enum repaper_stage stage)
-{
- unsigned int b;
-
- for (b = epd->width / 8; b > 0; b--) {
- if (data) {
- u8 pixels = data[b - 1] & 0x55;
- u8 pixel_mask = 0xff;
-
- if (mask) {
- pixel_mask = (mask[b - 1] ^ pixels) & 0x55;
- pixel_mask |= pixel_mask << 1;
- }
-
- switch (stage) {
- case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
- pixels = 0xaa | (pixels ^ 0x55);
- break;
- case REPAPER_WHITE: /* B -> N, W -> W (Current) */
- pixels = 0x55 + (pixels ^ 0x55);
- break;
- case REPAPER_INVERSE: /* B -> N, W -> B (New) */
- pixels = 0x55 | ((pixels ^ 0x55) << 1);
- break;
- case REPAPER_NORMAL: /* B -> B, W -> W (New) */
- pixels = 0xaa | pixels;
- break;
- }
-
- pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55);
- *(*pp)++ = pixels;
- } else {
- *(*pp)++ = fixed_value;
- }
- }
-}
-
-/* interleave bits: (byte)76543210 -> (16 bit).7.6.5.4.3.2.1 */
-static inline u16 repaper_interleave_bits(u16 value)
-{
- value = (value | (value << 4)) & 0x0f0f;
- value = (value | (value << 2)) & 0x3333;
- value = (value | (value << 1)) & 0x5555;
-
- return value;
-}
-
-/* pixels on display are numbered from 1 */
-static void repaper_all_pixels(struct repaper_epd *epd, u8 **pp,
- const u8 *data, u8 fixed_value, const u8 *mask,
- enum repaper_stage stage)
-{
- unsigned int b;
-
- for (b = epd->width / 8; b > 0; b--) {
- if (data) {
- u16 pixels = repaper_interleave_bits(data[b - 1]);
- u16 pixel_mask = 0xffff;
-
- if (mask) {
- pixel_mask = repaper_interleave_bits(mask[b - 1]);
-
- pixel_mask = (pixel_mask ^ pixels) & 0x5555;
- pixel_mask |= pixel_mask << 1;
- }
-
- switch (stage) {
- case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */
- pixels = 0xaaaa | (pixels ^ 0x5555);
- break;
- case REPAPER_WHITE: /* B -> N, W -> W (Current) */
- pixels = 0x5555 + (pixels ^ 0x5555);
- break;
- case REPAPER_INVERSE: /* B -> N, W -> B (New) */
- pixels = 0x5555 | ((pixels ^ 0x5555) << 1);
- break;
- case REPAPER_NORMAL: /* B -> B, W -> W (New) */
- pixels = 0xaaaa | pixels;
- break;
- }
-
- pixels = (pixels & pixel_mask) | (~pixel_mask & 0x5555);
- *(*pp)++ = pixels >> 8;
- *(*pp)++ = pixels;
- } else {
- *(*pp)++ = fixed_value;
- *(*pp)++ = fixed_value;
- }
- }
-}
-
-/* output one line of scan and data bytes to the display */
-static void repaper_one_line(struct repaper_epd *epd, unsigned int line,
- const u8 *data, u8 fixed_value, const u8 *mask,
- enum repaper_stage stage)
-{
- u8 *p = epd->line_buffer;
- unsigned int b;
-
- repaper_spi_mosi_low(epd->spi);
-
- if (epd->pre_border_byte)
- *p++ = 0x00;
-
- if (epd->middle_scan) {
- /* data bytes */
- repaper_odd_pixels(epd, &p, data, fixed_value, mask, stage);
-
- /* scan line */
- for (b = epd->bytes_per_scan; b > 0; b--) {
- if (line / 4 == b - 1)
- *p++ = 0x03 << (2 * (line & 0x03));
- else
- *p++ = 0x00;
- }
-
- /* data bytes */
- repaper_even_pixels(epd, &p, data, fixed_value, mask, stage);
- } else {
- /*
- * even scan line, but as lines on display are numbered from 1,
- * line: 1,3,5,...
- */
- for (b = 0; b < epd->bytes_per_scan; b++) {
- if (0 != (line & 0x01) && line / 8 == b)
- *p++ = 0xc0 >> (line & 0x06);
- else
- *p++ = 0x00;
- }
-
- /* data bytes */
- repaper_all_pixels(epd, &p, data, fixed_value, mask, stage);
-
- /*
- * odd scan line, but as lines on display are numbered from 1,
- * line: 0,2,4,6,...
- */
- for (b = epd->bytes_per_scan; b > 0; b--) {
- if (0 == (line & 0x01) && line / 8 == b - 1)
- *p++ = 0x03 << (line & 0x06);
- else
- *p++ = 0x00;
- }
- }
-
- switch (epd->border_byte) {
- case REPAPER_BORDER_BYTE_NONE:
- break;
-
- case REPAPER_BORDER_BYTE_ZERO:
- *p++ = 0x00;
- break;
-
- case REPAPER_BORDER_BYTE_SET:
- switch (stage) {
- case REPAPER_COMPENSATE:
- case REPAPER_WHITE:
- case REPAPER_INVERSE:
- *p++ = 0x00;
- break;
- case REPAPER_NORMAL:
- *p++ = 0xaa;
- break;
- }
- break;
- }
-
- repaper_write_buf(epd->spi, 0x0a, epd->line_buffer,
- p - epd->line_buffer);
-
- /* Output data to panel */
- repaper_write_val(epd->spi, 0x02, 0x07);
-
- repaper_spi_mosi_low(epd->spi);
-}
-
-static void repaper_frame_fixed(struct repaper_epd *epd, u8 fixed_value,
- enum repaper_stage stage)
-{
- unsigned int line;
-
- for (line = 0; line < epd->height; line++)
- repaper_one_line(epd, line, NULL, fixed_value, NULL, stage);
-}
-
-static void repaper_frame_data(struct repaper_epd *epd, const u8 *image,
- const u8 *mask, enum repaper_stage stage)
-{
- unsigned int line;
-
- if (!mask) {
- for (line = 0; line < epd->height; line++) {
- repaper_one_line(epd, line,
- &image[line * (epd->width / 8)],
- 0, NULL, stage);
- }
- } else {
- for (line = 0; line < epd->height; line++) {
- size_t n = line * epd->width / 8;
-
- repaper_one_line(epd, line, &image[n], 0, &mask[n],
- stage);
- }
- }
-}
-
-static void repaper_frame_fixed_repeat(struct repaper_epd *epd, u8 fixed_value,
- enum repaper_stage stage)
-{
- u64 start = local_clock();
- u64 end = start + (epd->factored_stage_time * 1000 * 1000);
-
- do {
- repaper_frame_fixed(epd, fixed_value, stage);
- } while (local_clock() < end);
-}
-
-static void repaper_frame_data_repeat(struct repaper_epd *epd, const u8 *image,
- const u8 *mask, enum repaper_stage stage)
-{
- u64 start = local_clock();
- u64 end = start + (epd->factored_stage_time * 1000 * 1000);
-
- do {
- repaper_frame_data(epd, image, mask, stage);
- } while (local_clock() < end);
-}
-
-static void repaper_get_temperature(struct repaper_epd *epd)
-{
- int ret, temperature = 0;
- unsigned int factor10x;
-
- if (!epd->thermal)
- return;
-
- ret = thermal_zone_get_temp(epd->thermal, &temperature);
- if (ret) {
- DRM_DEV_ERROR(&epd->spi->dev, "Failed to get temperature (%d)\n", ret);
- return;
- }
-
- temperature /= 1000;
-
- if (temperature <= -10)
- factor10x = 170;
- else if (temperature <= -5)
- factor10x = 120;
- else if (temperature <= 5)
- factor10x = 80;
- else if (temperature <= 10)
- factor10x = 40;
- else if (temperature <= 15)
- factor10x = 30;
- else if (temperature <= 20)
- factor10x = 20;
- else if (temperature <= 40)
- factor10x = 10;
- else
- factor10x = 7;
-
- epd->factored_stage_time = epd->stage_time * factor10x / 10;
-}
-
-static void repaper_gray8_to_mono_reversed(u8 *buf, u32 width, u32 height)
-{
- u8 *gray8 = buf, *mono = buf;
- int y, xb, i;
-
- for (y = 0; y < height; y++)
- for (xb = 0; xb < width / 8; xb++) {
- u8 byte = 0x00;
-
- for (i = 0; i < 8; i++) {
- int x = xb * 8 + i;
-
- byte >>= 1;
- if (gray8[y * width + x] >> 7)
- byte |= BIT(7);
- }
- *mono++ = byte;
- }
-}
-
-static int repaper_fb_dirty(struct drm_framebuffer *fb)
-{
- struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
- struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
- struct repaper_epd *epd = drm_to_epd(fb->dev);
- struct drm_rect clip;
- int idx, ret = 0;
- u8 *buf = NULL;
-
- if (!epd->enabled)
- return 0;
-
- if (!drm_dev_enter(fb->dev, &idx))
- return -ENODEV;
-
- /* repaper can't do partial updates */
- clip.x1 = 0;
- clip.x2 = fb->width;
- clip.y1 = 0;
- clip.y2 = fb->height;
-
- repaper_get_temperature(epd);
-
- DRM_DEBUG("Flushing [FB:%d] st=%ums\n", fb->base.id,
- epd->factored_stage_time);
-
- buf = kmalloc_array(fb->width, fb->height, GFP_KERNEL);
- if (!buf) {
- ret = -ENOMEM;
- goto out_exit;
- }
-
- if (import_attach) {
- ret = dma_buf_begin_cpu_access(import_attach->dmabuf,
- DMA_FROM_DEVICE);
- if (ret)
- goto out_free;
- }
-
- drm_fb_xrgb8888_to_gray8(buf, cma_obj->vaddr, fb, &clip);
-
- if (import_attach) {
- ret = dma_buf_end_cpu_access(import_attach->dmabuf,
- DMA_FROM_DEVICE);
- if (ret)
- goto out_free;
- }
-
- repaper_gray8_to_mono_reversed(buf, fb->width, fb->height);
-
- if (epd->partial) {
- repaper_frame_data_repeat(epd, buf, epd->current_frame,
- REPAPER_NORMAL);
- } else if (epd->cleared) {
- repaper_frame_data_repeat(epd, epd->current_frame, NULL,
- REPAPER_COMPENSATE);
- repaper_frame_data_repeat(epd, epd->current_frame, NULL,
- REPAPER_WHITE);
- repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);
- repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);
-
- epd->partial = true;
- } else {
- /* Clear display (anything -> white) */
- repaper_frame_fixed_repeat(epd, 0xff, REPAPER_COMPENSATE);
- repaper_frame_fixed_repeat(epd, 0xff, REPAPER_WHITE);
- repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_INVERSE);
- repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_NORMAL);
-
- /* Assuming a clear (white) screen output an image */
- repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_COMPENSATE);
- repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_WHITE);
- repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);
- repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);
-
- epd->cleared = true;
- epd->partial = true;
- }
-
- memcpy(epd->current_frame, buf, fb->width * fb->height / 8);
-
- /*
- * An extra frame write is needed if pixels are set in the bottom line,
- * or else grey lines rises up from the pixels
- */
- if (epd->pre_border_byte) {
- unsigned int x;
-
- for (x = 0; x < (fb->width / 8); x++)
- if (buf[x + (fb->width * (fb->height - 1) / 8)]) {
- repaper_frame_data_repeat(epd, buf,
- epd->current_frame,
- REPAPER_NORMAL);
- break;
- }
- }
-
-out_free:
- kfree(buf);
-out_exit:
- drm_dev_exit(idx);
-
- return ret;
-}
-
-static void power_off(struct repaper_epd *epd)
-{
- /* Turn off power and all signals */
- gpiod_set_value_cansleep(epd->reset, 0);
- gpiod_set_value_cansleep(epd->panel_on, 0);
- if (epd->border)
- gpiod_set_value_cansleep(epd->border, 0);
-
- /* Ensure SPI MOSI and CLOCK are Low before CS Low */
- repaper_spi_mosi_low(epd->spi);
-
- /* Discharge pulse */
- gpiod_set_value_cansleep(epd->discharge, 1);
- msleep(150);
- gpiod_set_value_cansleep(epd->discharge, 0);
-}
-
-static void repaper_pipe_enable(struct drm_simple_display_pipe *pipe,
- struct drm_crtc_state *crtc_state,
- struct drm_plane_state *plane_state)
-{
- struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);
- struct spi_device *spi = epd->spi;
- struct device *dev = &spi->dev;
- bool dc_ok = false;
- int i, ret, idx;
-
- if (!drm_dev_enter(pipe->crtc.dev, &idx))
- return;
-
- DRM_DEBUG_DRIVER("\n");
-
- /* Power up sequence */
- gpiod_set_value_cansleep(epd->reset, 0);
- gpiod_set_value_cansleep(epd->panel_on, 0);
- gpiod_set_value_cansleep(epd->discharge, 0);
- if (epd->border)
- gpiod_set_value_cansleep(epd->border, 0);
- repaper_spi_mosi_low(spi);
- usleep_range(5000, 10000);
-
- gpiod_set_value_cansleep(epd->panel_on, 1);
- /*
- * This delay comes from the repaper.org userspace driver, it's not
- * mentioned in the datasheet.
- */
- usleep_range(10000, 15000);
- gpiod_set_value_cansleep(epd->reset, 1);
- if (epd->border)
- gpiod_set_value_cansleep(epd->border, 1);
- usleep_range(5000, 10000);
- gpiod_set_value_cansleep(epd->reset, 0);
- usleep_range(5000, 10000);
- gpiod_set_value_cansleep(epd->reset, 1);
- usleep_range(5000, 10000);
-
- /* Wait for COG to become ready */
- for (i = 100; i > 0; i--) {
- if (!gpiod_get_value_cansleep(epd->busy))
- break;
-
- usleep_range(10, 100);
- }
-
- if (!i) {
- DRM_DEV_ERROR(dev, "timeout waiting for panel to become ready.\n");
- power_off(epd);
- goto out_exit;
- }
-
- repaper_read_id(spi);
- ret = repaper_read_id(spi);
- if (ret != REPAPER_RID_G2_COG_ID) {
- if (ret < 0)
- dev_err(dev, "failed to read chip (%d)\n", ret);
- else
- dev_err(dev, "wrong COG ID 0x%02x\n", ret);
- power_off(epd);
- goto out_exit;
- }
-
- /* Disable OE */
- repaper_write_val(spi, 0x02, 0x40);
-
- ret = repaper_read_val(spi, 0x0f);
- if (ret < 0 || !(ret & 0x80)) {
- if (ret < 0)
- DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret);
- else
- DRM_DEV_ERROR(dev, "panel is reported broken\n");
- power_off(epd);
- goto out_exit;
- }
-
- /* Power saving mode */
- repaper_write_val(spi, 0x0b, 0x02);
- /* Channel select */
- repaper_write_buf(spi, 0x01, epd->channel_select, 8);
- /* High power mode osc */
- repaper_write_val(spi, 0x07, 0xd1);
- /* Power setting */
- repaper_write_val(spi, 0x08, 0x02);
- /* Vcom level */
- repaper_write_val(spi, 0x09, 0xc2);
- /* Power setting */
- repaper_write_val(spi, 0x04, 0x03);
- /* Driver latch on */
- repaper_write_val(spi, 0x03, 0x01);
- /* Driver latch off */
- repaper_write_val(spi, 0x03, 0x00);
- usleep_range(5000, 10000);
-
- /* Start chargepump */
- for (i = 0; i < 4; ++i) {
- /* Charge pump positive voltage on - VGH/VDL on */
- repaper_write_val(spi, 0x05, 0x01);
- msleep(240);
-
- /* Charge pump negative voltage on - VGL/VDL on */
- repaper_write_val(spi, 0x05, 0x03);
- msleep(40);
-
- /* Charge pump Vcom on - Vcom driver on */
- repaper_write_val(spi, 0x05, 0x0f);
- msleep(40);
-
- /* check DC/DC */
- ret = repaper_read_val(spi, 0x0f);
- if (ret < 0) {
- DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret);
- power_off(epd);
- goto out_exit;
- }
-
- if (ret & 0x40) {
- dc_ok = true;
- break;
- }
- }
-
- if (!dc_ok) {
- DRM_DEV_ERROR(dev, "dc/dc failed\n");
- power_off(epd);
- goto out_exit;
- }
-
- /*
- * Output enable to disable
- * The userspace driver sets this to 0x04, but the datasheet says 0x06
- */
- repaper_write_val(spi, 0x02, 0x04);
-
- epd->enabled = true;
- epd->partial = false;
-out_exit:
- drm_dev_exit(idx);
-}
-
-static void repaper_pipe_disable(struct drm_simple_display_pipe *pipe)
-{
- struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);
- struct spi_device *spi = epd->spi;
- unsigned int line;
-
- /*
- * This callback is not protected by drm_dev_enter/exit since we want to
- * turn off the display on regular driver unload. It's highly unlikely
- * that the underlying SPI controller is gone should this be called after
- * unplug.
- */
-
- if (!epd->enabled)
- return;
-
- DRM_DEBUG_DRIVER("\n");
-
- epd->enabled = false;
-
- /* Nothing frame */
- for (line = 0; line < epd->height; line++)
- repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
- REPAPER_COMPENSATE);
-
- /* 2.7" */
- if (epd->border) {
- /* Dummy line */
- repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
- REPAPER_COMPENSATE);
- msleep(25);
- gpiod_set_value_cansleep(epd->border, 0);
- msleep(200);
- gpiod_set_value_cansleep(epd->border, 1);
- } else {
- /* Border dummy line */
- repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,
- REPAPER_NORMAL);
- msleep(200);
- }
-
- /* not described in datasheet */
- repaper_write_val(spi, 0x0b, 0x00);
- /* Latch reset turn on */
- repaper_write_val(spi, 0x03, 0x01);
- /* Power off charge pump Vcom */
- repaper_write_val(spi, 0x05, 0x03);
- /* Power off charge pump neg voltage */
- repaper_write_val(spi, 0x05, 0x01);
- msleep(120);
- /* Discharge internal */
- repaper_write_val(spi, 0x04, 0x80);
- /* turn off all charge pumps */
- repaper_write_val(spi, 0x05, 0x00);
- /* Turn off osc */
- repaper_write_val(spi, 0x07, 0x01);
- msleep(50);
-
- power_off(epd);
-}
-
-static void repaper_pipe_update(struct drm_simple_display_pipe *pipe,
- struct drm_plane_state *old_state)
-{
- struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
- struct drm_rect rect;
-
- if (drm_atomic_helper_damage_merged(old_state, state, &rect))
- repaper_fb_dirty(state->fb);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- spin_unlock_irq(&crtc->dev->event_lock);
- crtc->state->event = NULL;
- }
-}
-
-static const struct drm_simple_display_pipe_funcs repaper_pipe_funcs = {
- .enable = repaper_pipe_enable,
- .disable = repaper_pipe_disable,
- .update = repaper_pipe_update,
- .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
-};
-
-static int repaper_connector_get_modes(struct drm_connector *connector)
-{
- struct repaper_epd *epd = drm_to_epd(connector->dev);
- struct drm_display_mode *mode;
-
- mode = drm_mode_duplicate(connector->dev, epd->mode);
- if (!mode) {
- DRM_ERROR("Failed to duplicate mode\n");
- return 0;
- }
-
- drm_mode_set_name(mode);
- mode->type |= DRM_MODE_TYPE_PREFERRED;
- drm_mode_probed_add(connector, mode);
-
- connector->display_info.width_mm = mode->width_mm;
- connector->display_info.height_mm = mode->height_mm;
-
- return 1;
-}
-
-static const struct drm_connector_helper_funcs repaper_connector_hfuncs = {
- .get_modes = repaper_connector_get_modes,
-};
-
-static const struct drm_connector_funcs repaper_connector_funcs = {
- .reset = drm_atomic_helper_connector_reset,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = drm_connector_cleanup,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static const struct drm_mode_config_funcs repaper_mode_config_funcs = {
- .fb_create = drm_gem_fb_create_with_dirty,
- .atomic_check = drm_atomic_helper_check,
- .atomic_commit = drm_atomic_helper_commit,
-};
-
-static void repaper_release(struct drm_device *drm)
-{
- struct repaper_epd *epd = drm_to_epd(drm);
-
- DRM_DEBUG_DRIVER("\n");
-
- drm_mode_config_cleanup(drm);
- drm_dev_fini(drm);
- kfree(epd);
-}
-
-static const uint32_t repaper_formats[] = {
- DRM_FORMAT_XRGB8888,
-};
-
-static const struct drm_display_mode repaper_e1144cs021_mode = {
- DRM_SIMPLE_MODE(128, 96, 29, 22),
-};
-
-static const u8 repaper_e1144cs021_cs[] = { 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x0f, 0xff, 0x00 };
-
-static const struct drm_display_mode repaper_e1190cs021_mode = {
- DRM_SIMPLE_MODE(144, 128, 36, 32),
-};
-
-static const u8 repaper_e1190cs021_cs[] = { 0x00, 0x00, 0x00, 0x03,
- 0xfc, 0x00, 0x00, 0xff };
-
-static const struct drm_display_mode repaper_e2200cs021_mode = {
- DRM_SIMPLE_MODE(200, 96, 46, 22),
-};
-
-static const u8 repaper_e2200cs021_cs[] = { 0x00, 0x00, 0x00, 0x00,
- 0x01, 0xff, 0xe0, 0x00 };
-
-static const struct drm_display_mode repaper_e2271cs021_mode = {
- DRM_SIMPLE_MODE(264, 176, 57, 38),
-};
-
-static const u8 repaper_e2271cs021_cs[] = { 0x00, 0x00, 0x00, 0x7f,
- 0xff, 0xfe, 0x00, 0x00 };
-
-DEFINE_DRM_GEM_CMA_FOPS(repaper_fops);
-
-static struct drm_driver repaper_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- .fops = &repaper_fops,
- .release = repaper_release,
- DRM_GEM_CMA_VMAP_DRIVER_OPS,
- .name = "repaper",
- .desc = "Pervasive Displays RePaper e-ink panels",
- .date = "20170405",
- .major = 1,
- .minor = 0,
-};
-
-static const struct of_device_id repaper_of_match[] = {
- { .compatible = "pervasive,e1144cs021", .data = (void *)E1144CS021 },
- { .compatible = "pervasive,e1190cs021", .data = (void *)E1190CS021 },
- { .compatible = "pervasive,e2200cs021", .data = (void *)E2200CS021 },
- { .compatible = "pervasive,e2271cs021", .data = (void *)E2271CS021 },
- {},
-};
-MODULE_DEVICE_TABLE(of, repaper_of_match);
-
-static const struct spi_device_id repaper_id[] = {
- { "e1144cs021", E1144CS021 },
- { "e1190cs021", E1190CS021 },
- { "e2200cs021", E2200CS021 },
- { "e2271cs021", E2271CS021 },
- { },
-};
-MODULE_DEVICE_TABLE(spi, repaper_id);
-
-static int repaper_probe(struct spi_device *spi)
-{
- const struct drm_display_mode *mode;
- const struct spi_device_id *spi_id;
- const struct of_device_id *match;
- struct device *dev = &spi->dev;
- enum repaper_model model;
- const char *thermal_zone;
- struct repaper_epd *epd;
- size_t line_buffer_size;
- struct drm_device *drm;
- int ret;
-
- match = of_match_device(repaper_of_match, dev);
- if (match) {
- model = (enum repaper_model)match->data;
- } else {
- spi_id = spi_get_device_id(spi);
- model = spi_id->driver_data;
- }
-
- /* The SPI device is used to allocate dma memory */
- if (!dev->coherent_dma_mask) {
- ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
- if (ret) {
- dev_warn(dev, "Failed to set dma mask %d\n", ret);
- return ret;
- }
- }
-
- epd = kzalloc(sizeof(*epd), GFP_KERNEL);
- if (!epd)
- return -ENOMEM;
-
- drm = &epd->drm;
-
- ret = devm_drm_dev_init(dev, drm, &repaper_driver);
- if (ret) {
- kfree(epd);
- return ret;
- }
-
- drm_mode_config_init(drm);
- drm->mode_config.funcs = &repaper_mode_config_funcs;
-
- epd->spi = spi;
-
- epd->panel_on = devm_gpiod_get(dev, "panel-on", GPIOD_OUT_LOW);
- if (IS_ERR(epd->panel_on)) {
- ret = PTR_ERR(epd->panel_on);
- if (ret != -EPROBE_DEFER)
- DRM_DEV_ERROR(dev, "Failed to get gpio 'panel-on'\n");
- return ret;
- }
-
- epd->discharge = devm_gpiod_get(dev, "discharge", GPIOD_OUT_LOW);
- if (IS_ERR(epd->discharge)) {
- ret = PTR_ERR(epd->discharge);
- if (ret != -EPROBE_DEFER)
- DRM_DEV_ERROR(dev, "Failed to get gpio 'discharge'\n");
- return ret;
- }
-
- epd->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
- if (IS_ERR(epd->reset)) {
- ret = PTR_ERR(epd->reset);
- if (ret != -EPROBE_DEFER)
- DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
- return ret;
- }
-
- epd->busy = devm_gpiod_get(dev, "busy", GPIOD_IN);
- if (IS_ERR(epd->busy)) {
- ret = PTR_ERR(epd->busy);
- if (ret != -EPROBE_DEFER)
- DRM_DEV_ERROR(dev, "Failed to get gpio 'busy'\n");
- return ret;
- }
-
- if (!device_property_read_string(dev, "pervasive,thermal-zone",
- &thermal_zone)) {
- epd->thermal = thermal_zone_get_zone_by_name(thermal_zone);
- if (IS_ERR(epd->thermal)) {
- DRM_DEV_ERROR(dev, "Failed to get thermal zone: %s\n", thermal_zone);
- return PTR_ERR(epd->thermal);
- }
- }
-
- switch (model) {
- case E1144CS021:
- mode = &repaper_e1144cs021_mode;
- epd->channel_select = repaper_e1144cs021_cs;
- epd->stage_time = 480;
- epd->bytes_per_scan = 96 / 4;
- epd->middle_scan = true; /* data-scan-data */
- epd->pre_border_byte = false;
- epd->border_byte = REPAPER_BORDER_BYTE_ZERO;
- break;
-
- case E1190CS021:
- mode = &repaper_e1190cs021_mode;
- epd->channel_select = repaper_e1190cs021_cs;
- epd->stage_time = 480;
- epd->bytes_per_scan = 128 / 4 / 2;
- epd->middle_scan = false; /* scan-data-scan */
- epd->pre_border_byte = false;
- epd->border_byte = REPAPER_BORDER_BYTE_SET;
- break;
-
- case E2200CS021:
- mode = &repaper_e2200cs021_mode;
- epd->channel_select = repaper_e2200cs021_cs;
- epd->stage_time = 480;
- epd->bytes_per_scan = 96 / 4;
- epd->middle_scan = true; /* data-scan-data */
- epd->pre_border_byte = true;
- epd->border_byte = REPAPER_BORDER_BYTE_NONE;
- break;
-
- case E2271CS021:
- epd->border = devm_gpiod_get(dev, "border", GPIOD_OUT_LOW);
- if (IS_ERR(epd->border)) {
- ret = PTR_ERR(epd->border);
- if (ret != -EPROBE_DEFER)
- DRM_DEV_ERROR(dev, "Failed to get gpio 'border'\n");
- return ret;
- }
-
- mode = &repaper_e2271cs021_mode;
- epd->channel_select = repaper_e2271cs021_cs;
- epd->stage_time = 630;
- epd->bytes_per_scan = 176 / 4;
- epd->middle_scan = true; /* data-scan-data */
- epd->pre_border_byte = true;
- epd->border_byte = REPAPER_BORDER_BYTE_NONE;
- break;
-
- default:
- return -ENODEV;
- }
-
- epd->mode = mode;
- epd->width = mode->hdisplay;
- epd->height = mode->vdisplay;
- epd->factored_stage_time = epd->stage_time;
-
- line_buffer_size = 2 * epd->width / 8 + epd->bytes_per_scan + 2;
- epd->line_buffer = devm_kzalloc(dev, line_buffer_size, GFP_KERNEL);
- if (!epd->line_buffer)
- return -ENOMEM;
-
- epd->current_frame = devm_kzalloc(dev, epd->width * epd->height / 8,
- GFP_KERNEL);
- if (!epd->current_frame)
- return -ENOMEM;
-
- drm->mode_config.min_width = mode->hdisplay;
- drm->mode_config.max_width = mode->hdisplay;
- drm->mode_config.min_height = mode->vdisplay;
- drm->mode_config.max_height = mode->vdisplay;
-
- drm_connector_helper_add(&epd->connector, &repaper_connector_hfuncs);
- ret = drm_connector_init(drm, &epd->connector, &repaper_connector_funcs,
- DRM_MODE_CONNECTOR_SPI);
- if (ret)
- return ret;
-
- ret = drm_simple_display_pipe_init(drm, &epd->pipe, &repaper_pipe_funcs,
- repaper_formats, ARRAY_SIZE(repaper_formats),
- NULL, &epd->connector);
- if (ret)
- return ret;
-
- drm_mode_config_reset(drm);
-
- ret = drm_dev_register(drm, 0);
- if (ret)
- return ret;
-
- spi_set_drvdata(spi, drm);
-
- DRM_DEBUG_DRIVER("SPI speed: %uMHz\n", spi->max_speed_hz / 1000000);
-
- drm_fbdev_generic_setup(drm, 0);
-
- return 0;
-}
-
-static int repaper_remove(struct spi_device *spi)
-{
- struct drm_device *drm = spi_get_drvdata(spi);
-
- drm_dev_unplug(drm);
- drm_atomic_helper_shutdown(drm);
-
- return 0;
-}
-
-static void repaper_shutdown(struct spi_device *spi)
-{
- drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
-static struct spi_driver repaper_spi_driver = {
- .driver = {
- .name = "repaper",
- .owner = THIS_MODULE,
- .of_match_table = repaper_of_match,
- },
- .id_table = repaper_id,
- .probe = repaper_probe,
- .remove = repaper_remove,
- .shutdown = repaper_shutdown,
-};
-module_spi_driver(repaper_spi_driver);
-
-MODULE_DESCRIPTION("Pervasive Displays RePaper DRM driver");
-MODULE_AUTHOR("Noralf Trønnes");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DRM driver for Sitronix ST7586 panels
- *
- * Copyright 2017 David Lechner <david@lechnology.com>
- */
-
-#include <linux/delay.h>
-#include <linux/dma-buf.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/property.h>
-#include <linux/spi/spi.h>
-#include <video/mipi_display.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_damage_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_cma_helper.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_format_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_mipi_dbi.h>
-#include <drm/drm_rect.h>
-#include <drm/drm_vblank.h>
-
-/* controller-specific commands */
-#define ST7586_DISP_MODE_GRAY 0x38
-#define ST7586_DISP_MODE_MONO 0x39
-#define ST7586_ENABLE_DDRAM 0x3a
-#define ST7586_SET_DISP_DUTY 0xb0
-#define ST7586_SET_PART_DISP 0xb4
-#define ST7586_SET_NLINE_INV 0xb5
-#define ST7586_SET_VOP 0xc0
-#define ST7586_SET_BIAS_SYSTEM 0xc3
-#define ST7586_SET_BOOST_LEVEL 0xc4
-#define ST7586_SET_VOP_OFFSET 0xc7
-#define ST7586_ENABLE_ANALOG 0xd0
-#define ST7586_AUTO_READ_CTRL 0xd7
-#define ST7586_OTP_RW_CTRL 0xe0
-#define ST7586_OTP_CTRL_OUT 0xe1
-#define ST7586_OTP_READ 0xe3
-
-#define ST7586_DISP_CTRL_MX BIT(6)
-#define ST7586_DISP_CTRL_MY BIT(7)
-
-/*
- * The ST7586 controller has an unusual pixel format where 2bpp grayscale is
- * packed 3 pixels per byte with the first two pixels using 3 bits and the 3rd
- * pixel using only 2 bits.
- *
- * | D7 | D6 | D5 || | || 2bpp |
- * | (D4) | (D3) | (D2) || D1 | D0 || GRAY |
- * +------+------+------++------+------++------+
- * | 1 | 1 | 1 || 1 | 1 || 0 0 | black
- * | 1 | 0 | 0 || 1 | 0 || 0 1 | dark gray
- * | 0 | 1 | 0 || 0 | 1 || 1 0 | light gray
- * | 0 | 0 | 0 || 0 | 0 || 1 1 | white
- */
-
-static const u8 st7586_lookup[] = { 0x7, 0x4, 0x2, 0x0 };
-
-static void st7586_xrgb8888_to_gray332(u8 *dst, void *vaddr,
- struct drm_framebuffer *fb,
- struct drm_rect *clip)
-{
- size_t len = (clip->x2 - clip->x1) * (clip->y2 - clip->y1);
- unsigned int x, y;
- u8 *src, *buf, val;
-
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf)
- return;
-
- drm_fb_xrgb8888_to_gray8(buf, vaddr, fb, clip);
- src = buf;
-
- for (y = clip->y1; y < clip->y2; y++) {
- for (x = clip->x1; x < clip->x2; x += 3) {
- val = st7586_lookup[*src++ >> 6] << 5;
- val |= st7586_lookup[*src++ >> 6] << 2;
- val |= st7586_lookup[*src++ >> 6] >> 1;
- *dst++ = val;
- }
- }
-
- kfree(buf);
-}
-
-static int st7586_buf_copy(void *dst, struct drm_framebuffer *fb,
- struct drm_rect *clip)
-{
- struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
- struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
- void *src = cma_obj->vaddr;
- int ret = 0;
-
- if (import_attach) {
- ret = dma_buf_begin_cpu_access(import_attach->dmabuf,
- DMA_FROM_DEVICE);
- if (ret)
- return ret;
- }
-
- st7586_xrgb8888_to_gray332(dst, src, fb, clip);
-
- if (import_attach)
- ret = dma_buf_end_cpu_access(import_attach->dmabuf,
- DMA_FROM_DEVICE);
-
- return ret;
-}
-
-static void st7586_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
- struct mipi_dbi *dbi = &dbidev->dbi;
- int start, end, idx, ret = 0;
-
- if (!dbidev->enabled)
- return;
-
- if (!drm_dev_enter(fb->dev, &idx))
- return;
-
- /* 3 pixels per byte, so grow clip to nearest multiple of 3 */
- rect->x1 = rounddown(rect->x1, 3);
- rect->x2 = roundup(rect->x2, 3);
-
- DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
-
- ret = st7586_buf_copy(dbidev->tx_buf, fb, rect);
- if (ret)
- goto err_msg;
-
- /* Pixels are packed 3 per byte */
- start = rect->x1 / 3;
- end = rect->x2 / 3;
-
- mipi_dbi_command(dbi, MIPI_DCS_SET_COLUMN_ADDRESS,
- (start >> 8) & 0xFF, start & 0xFF,
- (end >> 8) & 0xFF, (end - 1) & 0xFF);
- mipi_dbi_command(dbi, MIPI_DCS_SET_PAGE_ADDRESS,
- (rect->y1 >> 8) & 0xFF, rect->y1 & 0xFF,
- (rect->y2 >> 8) & 0xFF, (rect->y2 - 1) & 0xFF);
-
- ret = mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START,
- (u8 *)dbidev->tx_buf,
- (end - start) * (rect->y2 - rect->y1));
-err_msg:
- if (ret)
- dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
-
- drm_dev_exit(idx);
-}
-
-static void st7586_pipe_update(struct drm_simple_display_pipe *pipe,
- struct drm_plane_state *old_state)
-{
- struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
- struct drm_rect rect;
-
- if (drm_atomic_helper_damage_merged(old_state, state, &rect))
- st7586_fb_dirty(state->fb, &rect);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- spin_unlock_irq(&crtc->dev->event_lock);
- crtc->state->event = NULL;
- }
-}
-
-static void st7586_pipe_enable(struct drm_simple_display_pipe *pipe,
- struct drm_crtc_state *crtc_state,
- struct drm_plane_state *plane_state)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
- struct drm_framebuffer *fb = plane_state->fb;
- struct mipi_dbi *dbi = &dbidev->dbi;
- struct drm_rect rect = {
- .x1 = 0,
- .x2 = fb->width,
- .y1 = 0,
- .y2 = fb->height,
- };
- int idx, ret;
- u8 addr_mode;
-
- if (!drm_dev_enter(pipe->crtc.dev, &idx))
- return;
-
- DRM_DEBUG_KMS("\n");
-
- ret = mipi_dbi_poweron_reset(dbidev);
- if (ret)
- goto out_exit;
-
- mipi_dbi_command(dbi, ST7586_AUTO_READ_CTRL, 0x9f);
- mipi_dbi_command(dbi, ST7586_OTP_RW_CTRL, 0x00);
-
- msleep(10);
-
- mipi_dbi_command(dbi, ST7586_OTP_READ);
-
- msleep(20);
-
- mipi_dbi_command(dbi, ST7586_OTP_CTRL_OUT);
- mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
-
- msleep(50);
-
- mipi_dbi_command(dbi, ST7586_SET_VOP_OFFSET, 0x00);
- mipi_dbi_command(dbi, ST7586_SET_VOP, 0xe3, 0x00);
- mipi_dbi_command(dbi, ST7586_SET_BIAS_SYSTEM, 0x02);
- mipi_dbi_command(dbi, ST7586_SET_BOOST_LEVEL, 0x04);
- mipi_dbi_command(dbi, ST7586_ENABLE_ANALOG, 0x1d);
- mipi_dbi_command(dbi, ST7586_SET_NLINE_INV, 0x00);
- mipi_dbi_command(dbi, ST7586_DISP_MODE_GRAY);
- mipi_dbi_command(dbi, ST7586_ENABLE_DDRAM, 0x02);
-
- switch (dbidev->rotation) {
- default:
- addr_mode = 0x00;
- break;
- case 90:
- addr_mode = ST7586_DISP_CTRL_MY;
- break;
- case 180:
- addr_mode = ST7586_DISP_CTRL_MX | ST7586_DISP_CTRL_MY;
- break;
- case 270:
- addr_mode = ST7586_DISP_CTRL_MX;
- break;
- }
- mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
-
- mipi_dbi_command(dbi, ST7586_SET_DISP_DUTY, 0x7f);
- mipi_dbi_command(dbi, ST7586_SET_PART_DISP, 0xa0);
- mipi_dbi_command(dbi, MIPI_DCS_SET_PARTIAL_AREA, 0x00, 0x00, 0x00, 0x77);
- mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE);
-
- msleep(100);
-
- dbidev->enabled = true;
- st7586_fb_dirty(fb, &rect);
-
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
-out_exit:
- drm_dev_exit(idx);
-}
-
-static void st7586_pipe_disable(struct drm_simple_display_pipe *pipe)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
-
- /*
- * This callback is not protected by drm_dev_enter/exit since we want to
- * turn off the display on regular driver unload. It's highly unlikely
- * that the underlying SPI controller is gone should this be called after
- * unplug.
- */
-
- DRM_DEBUG_KMS("\n");
-
- if (!dbidev->enabled)
- return;
-
- mipi_dbi_command(&dbidev->dbi, MIPI_DCS_SET_DISPLAY_OFF);
- dbidev->enabled = false;
-}
-
-static const u32 st7586_formats[] = {
- DRM_FORMAT_XRGB8888,
-};
-
-static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = {
- .enable = st7586_pipe_enable,
- .disable = st7586_pipe_disable,
- .update = st7586_pipe_update,
- .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
-};
-
-static const struct drm_display_mode st7586_mode = {
- DRM_SIMPLE_MODE(178, 128, 37, 27),
-};
-
-DEFINE_DRM_GEM_CMA_FOPS(st7586_fops);
-
-static struct drm_driver st7586_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- .fops = &st7586_fops,
- .release = mipi_dbi_release,
- DRM_GEM_CMA_VMAP_DRIVER_OPS,
- .debugfs_init = mipi_dbi_debugfs_init,
- .name = "st7586",
- .desc = "Sitronix ST7586",
- .date = "20170801",
- .major = 1,
- .minor = 0,
-};
-
-static const struct of_device_id st7586_of_match[] = {
- { .compatible = "lego,ev3-lcd" },
- {},
-};
-MODULE_DEVICE_TABLE(of, st7586_of_match);
-
-static const struct spi_device_id st7586_id[] = {
- { "ev3-lcd", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(spi, st7586_id);
-
-static int st7586_probe(struct spi_device *spi)
-{
- struct device *dev = &spi->dev;
- struct mipi_dbi_dev *dbidev;
- struct drm_device *drm;
- struct mipi_dbi *dbi;
- struct gpio_desc *a0;
- u32 rotation = 0;
- size_t bufsize;
- int ret;
-
- dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
- if (!dbidev)
- return -ENOMEM;
-
- dbi = &dbidev->dbi;
- drm = &dbidev->drm;
- ret = devm_drm_dev_init(dev, drm, &st7586_driver);
- if (ret) {
- kfree(dbidev);
- return ret;
- }
-
- drm_mode_config_init(drm);
-
- bufsize = (st7586_mode.vdisplay + 2) / 3 * st7586_mode.hdisplay;
-
- dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(dbi->reset)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
- return PTR_ERR(dbi->reset);
- }
-
- a0 = devm_gpiod_get(dev, "a0", GPIOD_OUT_LOW);
- if (IS_ERR(a0)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'a0'\n");
- return PTR_ERR(a0);
- }
-
- device_property_read_u32(dev, "rotation", &rotation);
-
- ret = mipi_dbi_spi_init(spi, dbi, a0);
- if (ret)
- return ret;
-
- /* Cannot read from this controller via SPI */
- dbi->read_commands = NULL;
-
- ret = mipi_dbi_dev_init_with_formats(dbidev, &st7586_pipe_funcs,
- st7586_formats, ARRAY_SIZE(st7586_formats),
- &st7586_mode, rotation, bufsize);
- if (ret)
- return ret;
-
- /*
- * we are using 8-bit data, so we are not actually swapping anything,
- * but setting mipi->swap_bytes makes mipi_dbi_typec3_command() do the
- * right thing and not use 16-bit transfers (which results in swapped
- * bytes on little-endian systems and causes out of order data to be
- * sent to the display).
- */
- dbi->swap_bytes = true;
-
- drm_mode_config_reset(drm);
-
- ret = drm_dev_register(drm, 0);
- if (ret)
- return ret;
-
- spi_set_drvdata(spi, drm);
-
- drm_fbdev_generic_setup(drm, 0);
-
- return 0;
-}
-
-static int st7586_remove(struct spi_device *spi)
-{
- struct drm_device *drm = spi_get_drvdata(spi);
-
- drm_dev_unplug(drm);
- drm_atomic_helper_shutdown(drm);
-
- return 0;
-}
-
-static void st7586_shutdown(struct spi_device *spi)
-{
- drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
-static struct spi_driver st7586_spi_driver = {
- .driver = {
- .name = "st7586",
- .owner = THIS_MODULE,
- .of_match_table = st7586_of_match,
- },
- .id_table = st7586_id,
- .probe = st7586_probe,
- .remove = st7586_remove,
- .shutdown = st7586_shutdown,
-};
-module_spi_driver(st7586_spi_driver);
-
-MODULE_DESCRIPTION("Sitronix ST7586 DRM driver");
-MODULE_AUTHOR("David Lechner <david@lechnology.com>");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * DRM driver for Sitronix ST7735R panels
- *
- * Copyright 2017 David Lechner <david@lechnology.com>
- */
-
-#include <linux/backlight.h>
-#include <linux/delay.h>
-#include <linux/dma-buf.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/property.h>
-#include <linux/spi/spi.h>
-#include <video/mipi_display.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_mipi_dbi.h>
-
-#define ST7735R_FRMCTR1 0xb1
-#define ST7735R_FRMCTR2 0xb2
-#define ST7735R_FRMCTR3 0xb3
-#define ST7735R_INVCTR 0xb4
-#define ST7735R_PWCTR1 0xc0
-#define ST7735R_PWCTR2 0xc1
-#define ST7735R_PWCTR3 0xc2
-#define ST7735R_PWCTR4 0xc3
-#define ST7735R_PWCTR5 0xc4
-#define ST7735R_VMCTR1 0xc5
-#define ST7735R_GAMCTRP1 0xe0
-#define ST7735R_GAMCTRN1 0xe1
-
-#define ST7735R_MY BIT(7)
-#define ST7735R_MX BIT(6)
-#define ST7735R_MV BIT(5)
-
-static void jd_t18003_t01_pipe_enable(struct drm_simple_display_pipe *pipe,
- struct drm_crtc_state *crtc_state,
- struct drm_plane_state *plane_state)
-{
- struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
- struct mipi_dbi *dbi = &dbidev->dbi;
- int ret, idx;
- u8 addr_mode;
-
- if (!drm_dev_enter(pipe->crtc.dev, &idx))
- return;
-
- DRM_DEBUG_KMS("\n");
-
- ret = mipi_dbi_poweron_reset(dbidev);
- if (ret)
- goto out_exit;
-
- msleep(150);
-
- mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
- msleep(500);
-
- mipi_dbi_command(dbi, ST7735R_FRMCTR1, 0x01, 0x2c, 0x2d);
- mipi_dbi_command(dbi, ST7735R_FRMCTR2, 0x01, 0x2c, 0x2d);
- mipi_dbi_command(dbi, ST7735R_FRMCTR3, 0x01, 0x2c, 0x2d, 0x01, 0x2c,
- 0x2d);
- mipi_dbi_command(dbi, ST7735R_INVCTR, 0x07);
- mipi_dbi_command(dbi, ST7735R_PWCTR1, 0xa2, 0x02, 0x84);
- mipi_dbi_command(dbi, ST7735R_PWCTR2, 0xc5);
- mipi_dbi_command(dbi, ST7735R_PWCTR3, 0x0a, 0x00);
- mipi_dbi_command(dbi, ST7735R_PWCTR4, 0x8a, 0x2a);
- mipi_dbi_command(dbi, ST7735R_PWCTR5, 0x8a, 0xee);
- mipi_dbi_command(dbi, ST7735R_VMCTR1, 0x0e);
- mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE);
- switch (dbidev->rotation) {
- default:
- addr_mode = ST7735R_MX | ST7735R_MY;
- break;
- case 90:
- addr_mode = ST7735R_MX | ST7735R_MV;
- break;
- case 180:
- addr_mode = 0;
- break;
- case 270:
- addr_mode = ST7735R_MY | ST7735R_MV;
- break;
- }
- mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
- mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
- MIPI_DCS_PIXEL_FMT_16BIT);
- mipi_dbi_command(dbi, ST7735R_GAMCTRP1, 0x02, 0x1c, 0x07, 0x12, 0x37,
- 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2b, 0x39, 0x00, 0x01,
- 0x03, 0x10);
- mipi_dbi_command(dbi, ST7735R_GAMCTRN1, 0x03, 0x1d, 0x07, 0x06, 0x2e,
- 0x2c, 0x29, 0x2d, 0x2e, 0x2e, 0x37, 0x3f, 0x00, 0x00,
- 0x02, 0x10);
- mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
-
- msleep(100);
-
- mipi_dbi_command(dbi, MIPI_DCS_ENTER_NORMAL_MODE);
-
- msleep(20);
-
- mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
-out_exit:
- drm_dev_exit(idx);
-}
-
-static const struct drm_simple_display_pipe_funcs jd_t18003_t01_pipe_funcs = {
- .enable = jd_t18003_t01_pipe_enable,
- .disable = mipi_dbi_pipe_disable,
- .update = mipi_dbi_pipe_update,
- .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
-};
-
-static const struct drm_display_mode jd_t18003_t01_mode = {
- DRM_SIMPLE_MODE(128, 160, 28, 35),
-};
-
-DEFINE_DRM_GEM_CMA_FOPS(st7735r_fops);
-
-static struct drm_driver st7735r_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- .fops = &st7735r_fops,
- .release = mipi_dbi_release,
- DRM_GEM_CMA_VMAP_DRIVER_OPS,
- .debugfs_init = mipi_dbi_debugfs_init,
- .name = "st7735r",
- .desc = "Sitronix ST7735R",
- .date = "20171128",
- .major = 1,
- .minor = 0,
-};
-
-static const struct of_device_id st7735r_of_match[] = {
- { .compatible = "jianda,jd-t18003-t01" },
- { },
-};
-MODULE_DEVICE_TABLE(of, st7735r_of_match);
-
-static const struct spi_device_id st7735r_id[] = {
- { "jd-t18003-t01", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(spi, st7735r_id);
-
-static int st7735r_probe(struct spi_device *spi)
-{
- struct device *dev = &spi->dev;
- struct mipi_dbi_dev *dbidev;
- struct drm_device *drm;
- struct mipi_dbi *dbi;
- struct gpio_desc *dc;
- u32 rotation = 0;
- int ret;
-
- dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
- if (!dbidev)
- return -ENOMEM;
-
- dbi = &dbidev->dbi;
- drm = &dbidev->drm;
- ret = devm_drm_dev_init(dev, drm, &st7735r_driver);
- if (ret) {
- kfree(dbidev);
- return ret;
- }
-
- drm_mode_config_init(drm);
-
- dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(dbi->reset)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
- return PTR_ERR(dbi->reset);
- }
-
- dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW);
- if (IS_ERR(dc)) {
- DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
- return PTR_ERR(dc);
- }
-
- dbidev->backlight = devm_of_find_backlight(dev);
- if (IS_ERR(dbidev->backlight))
- return PTR_ERR(dbidev->backlight);
-
- device_property_read_u32(dev, "rotation", &rotation);
-
- ret = mipi_dbi_spi_init(spi, dbi, dc);
- if (ret)
- return ret;
-
- /* Cannot read from Adafruit 1.8" display via SPI */
- dbi->read_commands = NULL;
-
- ret = mipi_dbi_dev_init(dbidev, &jd_t18003_t01_pipe_funcs, &jd_t18003_t01_mode, rotation);
- if (ret)
- return ret;
-
- drm_mode_config_reset(drm);
-
- ret = drm_dev_register(drm, 0);
- if (ret)
- return ret;
-
- spi_set_drvdata(spi, drm);
-
- drm_fbdev_generic_setup(drm, 0);
-
- return 0;
-}
-
-static int st7735r_remove(struct spi_device *spi)
-{
- struct drm_device *drm = spi_get_drvdata(spi);
-
- drm_dev_unplug(drm);
- drm_atomic_helper_shutdown(drm);
-
- return 0;
-}
-
-static void st7735r_shutdown(struct spi_device *spi)
-{
- drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
-static struct spi_driver st7735r_spi_driver = {
- .driver = {
- .name = "st7735r",
- .owner = THIS_MODULE,
- .of_match_table = st7735r_of_match,
- },
- .id_table = st7735r_id,
- .probe = st7735r_probe,
- .remove = st7735r_remove,
- .shutdown = st7735r_shutdown,
-};
-module_spi_driver(st7735r_spi_driver);
-
-MODULE_DESCRIPTION("Sitronix ST7735R DRM driver");
-MODULE_AUTHOR("David Lechner <david@lechnology.com>");
-MODULE_LICENSE("GPL");
projects / openwrt / staging / blogic.git / commitdiff