--- /dev/null
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Jani Nikula <jani.nikula@intel.com>
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/i915_drm.h>
+#include <linux/slab.h>
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_dsi.h"
+#include "intel_dsi_cmd.h"
+
+/* the sub-encoders aka panel drivers */
+static const struct intel_dsi_device intel_dsi_devices[] = {
+};
+
+static struct intel_dsi *intel_attached_dsi(struct drm_connector *connector)
+{
+ return container_of(intel_attached_encoder(connector),
+ struct intel_dsi, base);
+}
+
+static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
+{
+ return intel_dsi->dev.type == INTEL_DSI_VIDEO_MODE;
+}
+
+static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
+{
+ return intel_dsi->dev.type == INTEL_DSI_COMMAND_MODE;
+}
+
+static void intel_dsi_hot_plug(struct intel_encoder *encoder)
+{
+ DRM_DEBUG_KMS("\n");
+}
+
+static bool intel_dsi_compute_config(struct intel_encoder *encoder,
+ struct intel_crtc_config *config)
+{
+ struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi,
+ base);
+ struct intel_connector *intel_connector = intel_dsi->attached_connector;
+ struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
+ struct drm_display_mode *adjusted_mode = &config->adjusted_mode;
+ struct drm_display_mode *mode = &config->requested_mode;
+
+ DRM_DEBUG_KMS("\n");
+
+ if (fixed_mode)
+ intel_fixed_panel_mode(fixed_mode, adjusted_mode);
+
+ if (intel_dsi->dev.dev_ops->mode_fixup)
+ return intel_dsi->dev.dev_ops->mode_fixup(&intel_dsi->dev,
+ mode, adjusted_mode);
+
+ return true;
+}
+
+static void intel_dsi_pre_pll_enable(struct intel_encoder *encoder)
+{
+ DRM_DEBUG_KMS("\n");
+}
+
+static void intel_dsi_pre_enable(struct intel_encoder *encoder)
+{
+ DRM_DEBUG_KMS("\n");
+}
+
+static void intel_dsi_enable(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+ struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ int pipe = intel_crtc->pipe;
+ u32 temp;
+
+ DRM_DEBUG_KMS("\n");
+
+ temp = I915_READ(MIPI_DEVICE_READY(pipe));
+ if ((temp & DEVICE_READY) == 0) {
+ temp &= ~ULPS_STATE_MASK;
+ I915_WRITE(MIPI_DEVICE_READY(pipe), temp | DEVICE_READY);
+ } else if (temp & ULPS_STATE_MASK) {
+ temp &= ~ULPS_STATE_MASK;
+ I915_WRITE(MIPI_DEVICE_READY(pipe), temp | ULPS_STATE_EXIT);
+ /*
+ * We need to ensure that there is a minimum of 1 ms time
+ * available before clearing the UPLS exit state.
+ */
+ msleep(2);
+ I915_WRITE(MIPI_DEVICE_READY(pipe), temp);
+ }
+
+ if (is_cmd_mode(intel_dsi))
+ I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(pipe), 8 * 4);
+
+ if (is_vid_mode(intel_dsi)) {
+ msleep(20); /* XXX */
+ dpi_send_cmd(intel_dsi, TURN_ON);
+ msleep(100);
+
+ /* assert ip_tg_enable signal */
+ temp = I915_READ(MIPI_PORT_CTRL(pipe));
+ I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(pipe));
+ }
+
+ intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
+}
+
+static void intel_dsi_disable(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+ struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ int pipe = intel_crtc->pipe;
+ u32 temp;
+
+ DRM_DEBUG_KMS("\n");
+
+ intel_dsi->dev.dev_ops->disable(&intel_dsi->dev);
+
+ if (is_vid_mode(intel_dsi)) {
+ dpi_send_cmd(intel_dsi, SHUTDOWN);
+ msleep(10);
+
+ /* de-assert ip_tg_enable signal */
+ temp = I915_READ(MIPI_PORT_CTRL(pipe));
+ I915_WRITE(MIPI_PORT_CTRL(pipe), temp & ~DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(pipe));
+
+ msleep(2);
+ }
+
+ temp = I915_READ(MIPI_DEVICE_READY(pipe));
+ if (temp & DEVICE_READY) {
+ temp &= ~DEVICE_READY;
+ temp &= ~ULPS_STATE_MASK;
+ I915_WRITE(MIPI_DEVICE_READY(pipe), temp);
+ }
+}
+
+static void intel_dsi_post_disable(struct intel_encoder *encoder)
+{
+ DRM_DEBUG_KMS("\n");
+}
+
+static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
+ enum pipe *pipe)
+{
+ struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+ u32 port, func;
+ enum pipe p;
+
+ DRM_DEBUG_KMS("\n");
+
+ /* XXX: this only works for one DSI output */
+ for (p = PIPE_A; p <= PIPE_B; p++) {
+ port = I915_READ(MIPI_PORT_CTRL(p));
+ func = I915_READ(MIPI_DSI_FUNC_PRG(p));
+
+ if ((port & DPI_ENABLE) || (func & CMD_MODE_DATA_WIDTH_MASK)) {
+ if (I915_READ(MIPI_DEVICE_READY(p)) & DEVICE_READY) {
+ *pipe = p;
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+static void intel_dsi_get_config(struct intel_encoder *encoder,
+ struct intel_crtc_config *pipe_config)
+{
+ DRM_DEBUG_KMS("\n");
+
+ /* XXX: read flags, set to adjusted_mode */
+}
+
+static int intel_dsi_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct intel_connector *intel_connector = to_intel_connector(connector);
+ struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
+ struct intel_dsi *intel_dsi = intel_attached_dsi(connector);
+
+ DRM_DEBUG_KMS("\n");
+
+ if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
+ DRM_DEBUG_KMS("MODE_NO_DBLESCAN\n");
+ return MODE_NO_DBLESCAN;
+ }
+
+ if (fixed_mode) {
+ if (mode->hdisplay > fixed_mode->hdisplay)
+ return MODE_PANEL;
+ if (mode->vdisplay > fixed_mode->vdisplay)
+ return MODE_PANEL;
+ }
+
+ return intel_dsi->dev.dev_ops->mode_valid(&intel_dsi->dev, mode);
+}
+
+/* return txclkesc cycles in terms of divider and duration in us */
+static u16 txclkesc(u32 divider, unsigned int us)
+{
+ switch (divider) {
+ case ESCAPE_CLOCK_DIVIDER_1:
+ default:
+ return 20 * us;
+ case ESCAPE_CLOCK_DIVIDER_2:
+ return 10 * us;
+ case ESCAPE_CLOCK_DIVIDER_4:
+ return 5 * us;
+ }
+}
+
+/* return pixels in terms of txbyteclkhs */
+static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count)
+{
+ return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp, 8), lane_count);
+}
+
+static void set_dsi_timings(struct drm_encoder *encoder,
+ const struct drm_display_mode *mode)
+{
+ struct drm_device *dev = encoder->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
+ int pipe = intel_crtc->pipe;
+ unsigned int bpp = intel_crtc->config.pipe_bpp;
+ unsigned int lane_count = intel_dsi->lane_count;
+
+ u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
+
+ hactive = mode->hdisplay;
+ hfp = mode->hsync_start - mode->hdisplay;
+ hsync = mode->hsync_end - mode->hsync_start;
+ hbp = mode->htotal - mode->hsync_end;
+
+ vfp = mode->vsync_start - mode->vdisplay;
+ vsync = mode->vsync_end - mode->vsync_start;
+ vbp = mode->vtotal - mode->vsync_end;
+
+ /* horizontal values are in terms of high speed byte clock */
+ hactive = txbyteclkhs(hactive, bpp, lane_count);
+ hfp = txbyteclkhs(hfp, bpp, lane_count);
+ hsync = txbyteclkhs(hsync, bpp, lane_count);
+ hbp = txbyteclkhs(hbp, bpp, lane_count);
+
+ I915_WRITE(MIPI_HACTIVE_AREA_COUNT(pipe), hactive);
+ I915_WRITE(MIPI_HFP_COUNT(pipe), hfp);
+
+ /* meaningful for video mode non-burst sync pulse mode only, can be zero
+ * for non-burst sync events and burst modes */
+ I915_WRITE(MIPI_HSYNC_PADDING_COUNT(pipe), hsync);
+ I915_WRITE(MIPI_HBP_COUNT(pipe), hbp);
+
+ /* vertical values are in terms of lines */
+ I915_WRITE(MIPI_VFP_COUNT(pipe), vfp);
+ I915_WRITE(MIPI_VSYNC_PADDING_COUNT(pipe), vsync);
+ I915_WRITE(MIPI_VBP_COUNT(pipe), vbp);
+}
+
+static void intel_dsi_mode_set(struct intel_encoder *intel_encoder)
+{
+ struct drm_encoder *encoder = &intel_encoder->base;
+ struct drm_device *dev = encoder->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
+ struct drm_display_mode *adjusted_mode =
+ &intel_crtc->config.adjusted_mode;
+ int pipe = intel_crtc->pipe;
+ unsigned int bpp = intel_crtc->config.pipe_bpp;
+ u32 val, tmp;
+
+ DRM_DEBUG_KMS("pipe %d\n", pipe);
+
+ /* escape clock divider, 20MHz, shared for A and C. device ready must be
+ * off when doing this! txclkesc? */
+ tmp = I915_READ(MIPI_CTRL(0));
+ tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
+ I915_WRITE(MIPI_CTRL(0), tmp | ESCAPE_CLOCK_DIVIDER_1);
+
+ /* read request priority is per pipe */
+ tmp = I915_READ(MIPI_CTRL(pipe));
+ tmp &= ~READ_REQUEST_PRIORITY_MASK;
+ I915_WRITE(MIPI_CTRL(pipe), tmp | READ_REQUEST_PRIORITY_HIGH);
+
+ /* XXX: why here, why like this? handling in irq handler?! */
+ I915_WRITE(MIPI_INTR_STAT(pipe), 0xffffffff);
+ I915_WRITE(MIPI_INTR_EN(pipe), 0xffffffff);
+
+ I915_WRITE(MIPI_DPHY_PARAM(pipe),
+ 0x3c << EXIT_ZERO_COUNT_SHIFT |
+ 0x1f << TRAIL_COUNT_SHIFT |
+ 0xc5 << CLK_ZERO_COUNT_SHIFT |
+ 0x1f << PREPARE_COUNT_SHIFT);
+
+ I915_WRITE(MIPI_DPI_RESOLUTION(pipe),
+ adjusted_mode->vdisplay << VERTICAL_ADDRESS_SHIFT |
+ adjusted_mode->hdisplay << HORIZONTAL_ADDRESS_SHIFT);
+
+ set_dsi_timings(encoder, adjusted_mode);
+
+ val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
+ if (is_cmd_mode(intel_dsi)) {
+ val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
+ val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
+ } else {
+ val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
+
+ /* XXX: cross-check bpp vs. pixel format? */
+ val |= intel_dsi->pixel_format;
+ }
+ I915_WRITE(MIPI_DSI_FUNC_PRG(pipe), val);
+
+ /* timeouts for recovery. one frame IIUC. if counter expires, EOT and
+ * stop state. */
+
+ /*
+ * In burst mode, value greater than one DPI line Time in byte clock
+ * (txbyteclkhs) To timeout this timer 1+ of the above said value is
+ * recommended.
+ *
+ * In non-burst mode, Value greater than one DPI frame time in byte
+ * clock(txbyteclkhs) To timeout this timer 1+ of the above said value
+ * is recommended.
+ *
+ * In DBI only mode, value greater than one DBI frame time in byte
+ * clock(txbyteclkhs) To timeout this timer 1+ of the above said value
+ * is recommended.
+ */
+
+ if (is_vid_mode(intel_dsi) &&
+ intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
+ I915_WRITE(MIPI_HS_TX_TIMEOUT(pipe),
+ txbyteclkhs(adjusted_mode->htotal, bpp,
+ intel_dsi->lane_count) + 1);
+ } else {
+ I915_WRITE(MIPI_HS_TX_TIMEOUT(pipe),
+ txbyteclkhs(adjusted_mode->vtotal *
+ adjusted_mode->htotal,
+ bpp, intel_dsi->lane_count) + 1);
+ }
+ I915_WRITE(MIPI_LP_RX_TIMEOUT(pipe), 8309); /* max */
+ I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(pipe), 0x14); /* max */
+ I915_WRITE(MIPI_DEVICE_RESET_TIMER(pipe), 0xffff); /* max */
+
+ /* dphy stuff */
+
+ /* in terms of low power clock */
+ I915_WRITE(MIPI_INIT_COUNT(pipe), txclkesc(ESCAPE_CLOCK_DIVIDER_1, 100));
+
+ /* recovery disables */
+ I915_WRITE(MIPI_EOT_DISABLE(pipe), intel_dsi->eot_disable);
+
+ /* in terms of txbyteclkhs. actual high to low switch +
+ * MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK.
+ *
+ * XXX: write MIPI_STOP_STATE_STALL?
+ */
+ I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(pipe), 0x46);
+
+ /* XXX: low power clock equivalence in terms of byte clock. the number
+ * of byte clocks occupied in one low power clock. based on txbyteclkhs
+ * and txclkesc. txclkesc time / txbyteclk time * (105 +
+ * MIPI_STOP_STATE_STALL) / 105.???
+ */
+ I915_WRITE(MIPI_LP_BYTECLK(pipe), 4);
+
+ /* the bw essential for transmitting 16 long packets containing 252
+ * bytes meant for dcs write memory command is programmed in this
+ * register in terms of byte clocks. based on dsi transfer rate and the
+ * number of lanes configured the time taken to transmit 16 long packets
+ * in a dsi stream varies. */
+ I915_WRITE(MIPI_DBI_BW_CTRL(pipe), 0x820);
+
+ I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(pipe),
+ 0xa << LP_HS_SSW_CNT_SHIFT |
+ 0x14 << HS_LP_PWR_SW_CNT_SHIFT);
+
+ if (is_vid_mode(intel_dsi))
+ I915_WRITE(MIPI_VIDEO_MODE_FORMAT(pipe),
+ intel_dsi->video_mode_format);
+}
+
+static enum drm_connector_status
+intel_dsi_detect(struct drm_connector *connector, bool force)
+{
+ struct intel_dsi *intel_dsi = intel_attached_dsi(connector);
+ DRM_DEBUG_KMS("\n");
+ return intel_dsi->dev.dev_ops->detect(&intel_dsi->dev);
+}
+
+static int intel_dsi_get_modes(struct drm_connector *connector)
+{
+ struct intel_connector *intel_connector = to_intel_connector(connector);
+ struct drm_display_mode *mode;
+
+ DRM_DEBUG_KMS("\n");
+
+ if (!intel_connector->panel.fixed_mode) {
+ DRM_DEBUG_KMS("no fixed mode\n");
+ return 0;
+ }
+
+ mode = drm_mode_duplicate(connector->dev,
+ intel_connector->panel.fixed_mode);
+ if (!mode) {
+ DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
+ return 0;
+ }
+
+ drm_mode_probed_add(connector, mode);
+ return 1;
+}
+
+static void intel_dsi_destroy(struct drm_connector *connector)
+{
+ struct intel_connector *intel_connector = to_intel_connector(connector);
+
+ DRM_DEBUG_KMS("\n");
+ intel_panel_fini(&intel_connector->panel);
+ drm_sysfs_connector_remove(connector);
+ drm_connector_cleanup(connector);
+ kfree(connector);
+}
+
+static const struct drm_encoder_funcs intel_dsi_funcs = {
+ .destroy = intel_encoder_destroy,
+};
+
+static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = {
+ .get_modes = intel_dsi_get_modes,
+ .mode_valid = intel_dsi_mode_valid,
+ .best_encoder = intel_best_encoder,
+};
+
+static const struct drm_connector_funcs intel_dsi_connector_funcs = {
+ .dpms = intel_connector_dpms,
+ .detect = intel_dsi_detect,
+ .destroy = intel_dsi_destroy,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+};
+
+bool intel_dsi_init(struct drm_device *dev)
+{
+ struct intel_dsi *intel_dsi;
+ struct intel_encoder *intel_encoder;
+ struct drm_encoder *encoder;
+ struct intel_connector *intel_connector;
+ struct drm_connector *connector;
+ struct drm_display_mode *fixed_mode = NULL;
+ const struct intel_dsi_device *dsi;
+ unsigned int i;
+
+ DRM_DEBUG_KMS("\n");
+
+ intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL);
+ if (!intel_dsi)
+ return false;
+
+ intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
+ if (!intel_connector) {
+ kfree(intel_dsi);
+ return false;
+ }
+
+ intel_encoder = &intel_dsi->base;
+ encoder = &intel_encoder->base;
+ intel_dsi->attached_connector = intel_connector;
+
+ connector = &intel_connector->base;
+
+ drm_encoder_init(dev, encoder, &intel_dsi_funcs, DRM_MODE_ENCODER_DSI);
+
+ /* XXX: very likely not all of these are needed */
+ intel_encoder->hot_plug = intel_dsi_hot_plug;
+ intel_encoder->compute_config = intel_dsi_compute_config;
+ intel_encoder->pre_pll_enable = intel_dsi_pre_pll_enable;
+ intel_encoder->pre_enable = intel_dsi_pre_enable;
+ intel_encoder->enable = intel_dsi_enable;
+ intel_encoder->mode_set = intel_dsi_mode_set;
+ intel_encoder->disable = intel_dsi_disable;
+ intel_encoder->post_disable = intel_dsi_post_disable;
+ intel_encoder->get_hw_state = intel_dsi_get_hw_state;
+ intel_encoder->get_config = intel_dsi_get_config;
+
+ intel_connector->get_hw_state = intel_connector_get_hw_state;
+
+ for (i = 0; i < ARRAY_SIZE(intel_dsi_devices); i++) {
+ dsi = &intel_dsi_devices[i];
+ intel_dsi->dev = *dsi;
+
+ if (dsi->dev_ops->init(&intel_dsi->dev))
+ break;
+ }
+
+ if (i == ARRAY_SIZE(intel_dsi_devices)) {
+ DRM_DEBUG_KMS("no device found\n");
+ goto err;
+ }
+
+ intel_encoder->type = INTEL_OUTPUT_DSI;
+ intel_encoder->crtc_mask = (1 << 0); /* XXX */
+
+ intel_encoder->cloneable = false;
+ drm_connector_init(dev, connector, &intel_dsi_connector_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+
+ drm_connector_helper_add(connector, &intel_dsi_connector_helper_funcs);
+
+ connector->display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/
+ connector->interlace_allowed = false;
+ connector->doublescan_allowed = false;
+
+ intel_connector_attach_encoder(intel_connector, intel_encoder);
+
+ drm_sysfs_connector_add(connector);
+
+ fixed_mode = dsi->dev_ops->get_modes(&intel_dsi->dev);
+ if (!fixed_mode) {
+ DRM_DEBUG_KMS("no fixed mode\n");
+ goto err;
+ }
+
+ fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
+ intel_panel_init(&intel_connector->panel, fixed_mode);
+
+ return true;
+
+err:
+ drm_encoder_cleanup(&intel_encoder->base);
+ kfree(intel_dsi);
+ kfree(intel_connector);
+
+ return false;
+}
projects / openwrt / staging / blogic.git / commitdiff