--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_panel.h>
+
+#include "sun4i_drv.h"
+#include "sun4i_tcon.h"
+
+struct sun4i_rgb {
+ struct drm_connector connector;
+ struct drm_encoder encoder;
+
+ struct sun4i_drv *drv;
+};
+
+static inline struct sun4i_rgb *
+drm_connector_to_sun4i_rgb(struct drm_connector *connector)
+{
+ return container_of(connector, struct sun4i_rgb,
+ connector);
+}
+
+static inline struct sun4i_rgb *
+drm_encoder_to_sun4i_rgb(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct sun4i_rgb,
+ encoder);
+}
+
+static int sun4i_rgb_get_modes(struct drm_connector *connector)
+{
+ struct sun4i_rgb *rgb =
+ drm_connector_to_sun4i_rgb(connector);
+ struct sun4i_drv *drv = rgb->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ return drm_panel_get_modes(tcon->panel);
+}
+
+static int sun4i_rgb_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ u32 hsync = mode->hsync_end - mode->hsync_start;
+ u32 vsync = mode->vsync_end - mode->vsync_start;
+
+ DRM_DEBUG_DRIVER("Validating modes...\n");
+
+ if (hsync < 1)
+ return MODE_HSYNC_NARROW;
+
+ if (hsync > 0x3ff)
+ return MODE_HSYNC_WIDE;
+
+ if ((mode->hdisplay < 1) || (mode->htotal < 1))
+ return MODE_H_ILLEGAL;
+
+ if ((mode->hdisplay > 0x7ff) || (mode->htotal > 0xfff))
+ return MODE_BAD_HVALUE;
+
+ DRM_DEBUG_DRIVER("Horizontal parameters OK\n");
+
+ if (vsync < 1)
+ return MODE_VSYNC_NARROW;
+
+ if (vsync > 0x3ff)
+ return MODE_VSYNC_WIDE;
+
+ if ((mode->vdisplay < 1) || (mode->vtotal < 1))
+ return MODE_V_ILLEGAL;
+
+ if ((mode->vdisplay > 0x7ff) || (mode->vtotal > 0xfff))
+ return MODE_BAD_VVALUE;
+
+ DRM_DEBUG_DRIVER("Vertical parameters OK\n");
+
+ return MODE_OK;
+}
+
+static struct drm_encoder *
+sun4i_rgb_best_encoder(struct drm_connector *connector)
+{
+ struct sun4i_rgb *rgb =
+ drm_connector_to_sun4i_rgb(connector);
+
+ return &rgb->encoder;
+}
+
+static struct drm_connector_helper_funcs sun4i_rgb_con_helper_funcs = {
+ .get_modes = sun4i_rgb_get_modes,
+ .mode_valid = sun4i_rgb_mode_valid,
+ .best_encoder = sun4i_rgb_best_encoder,
+};
+
+static enum drm_connector_status
+sun4i_rgb_connector_detect(struct drm_connector *connector, bool force)
+{
+ return connector_status_connected;
+}
+
+static void
+sun4i_rgb_connector_destroy(struct drm_connector *connector)
+{
+ struct sun4i_rgb *rgb = drm_connector_to_sun4i_rgb(connector);
+ struct sun4i_drv *drv = rgb->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ drm_panel_detach(tcon->panel);
+ drm_connector_cleanup(connector);
+}
+
+static struct drm_connector_funcs sun4i_rgb_con_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .detect = sun4i_rgb_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = sun4i_rgb_connector_destroy,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int sun4i_rgb_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ return 0;
+}
+
+static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder)
+{
+ struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
+ struct sun4i_drv *drv = rgb->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ DRM_DEBUG_DRIVER("Enabling RGB output\n");
+
+ drm_panel_enable(tcon->panel);
+ sun4i_tcon_channel_enable(tcon, 0);
+}
+
+static void sun4i_rgb_encoder_disable(struct drm_encoder *encoder)
+{
+ struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
+ struct sun4i_drv *drv = rgb->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ DRM_DEBUG_DRIVER("Disabling RGB output\n");
+
+ sun4i_tcon_channel_disable(tcon, 0);
+ drm_panel_disable(tcon->panel);
+}
+
+static void sun4i_rgb_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
+ struct sun4i_drv *drv = rgb->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ sun4i_tcon0_mode_set(tcon, mode);
+
+ clk_set_rate(tcon->dclk, mode->crtc_clock * 1000);
+
+ /* FIXME: This seems to be board specific */
+ clk_set_phase(tcon->dclk, 120);
+}
+
+static struct drm_encoder_helper_funcs sun4i_rgb_enc_helper_funcs = {
+ .atomic_check = sun4i_rgb_atomic_check,
+ .mode_set = sun4i_rgb_encoder_mode_set,
+ .disable = sun4i_rgb_encoder_disable,
+ .enable = sun4i_rgb_encoder_enable,
+};
+
+static void sun4i_rgb_enc_destroy(struct drm_encoder *encoder)
+{
+ drm_encoder_cleanup(encoder);
+}
+
+static struct drm_encoder_funcs sun4i_rgb_enc_funcs = {
+ .destroy = sun4i_rgb_enc_destroy,
+};
+
+int sun4i_rgb_init(struct drm_device *drm)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_tcon *tcon = drv->tcon;
+ struct sun4i_rgb *rgb;
+ int ret;
+
+ /* If we don't have a panel, there's no point in going on */
+ if (!tcon->panel)
+ return -ENODEV;
+
+ rgb = devm_kzalloc(drm->dev, sizeof(*rgb), GFP_KERNEL);
+ if (!rgb)
+ return -ENOMEM;
+ rgb->drv = drv;
+
+ drm_encoder_helper_add(&rgb->encoder,
+ &sun4i_rgb_enc_helper_funcs);
+ ret = drm_encoder_init(drm,
+ &rgb->encoder,
+ &sun4i_rgb_enc_funcs,
+ DRM_MODE_ENCODER_NONE,
+ NULL);
+ if (ret) {
+ dev_err(drm->dev, "Couldn't initialise the rgb encoder\n");
+ goto err_out;
+ }
+
+ /* The RGB encoder can only work with the TCON channel 0 */
+ rgb->encoder.possible_crtcs = BIT(0);
+
+ drm_connector_helper_add(&rgb->connector,
+ &sun4i_rgb_con_helper_funcs);
+ ret = drm_connector_init(drm, &rgb->connector,
+ &sun4i_rgb_con_funcs,
+ DRM_MODE_CONNECTOR_Unknown);
+ if (ret) {
+ dev_err(drm->dev, "Couldn't initialise the rgb connector\n");
+ goto err_cleanup_connector;
+ }
+
+ drm_mode_connector_attach_encoder(&rgb->connector, &rgb->encoder);
+
+ drm_panel_attach(tcon->panel, &rgb->connector);
+
+ return 0;
+
+err_cleanup_connector:
+ drm_encoder_cleanup(&rgb->encoder);
+err_out:
+ return ret;
+}
+EXPORT_SYMBOL(sun4i_rgb_init);
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
#include <linux/component.h>
#include <linux/ioport.h>
#include <linux/of_address.h>
+#include <linux/of_graph.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include "sun4i_crtc.h"
#include "sun4i_dotclock.h"
#include "sun4i_drv.h"
+#include "sun4i_rgb.h"
#include "sun4i_tcon.h"
void sun4i_tcon_disable(struct sun4i_tcon *tcon)
return 0;
}
+static struct drm_panel *sun4i_tcon_find_panel(struct device_node *node)
+{
+ struct device_node *port, *remote, *child;
+ struct device_node *end_node = NULL;
+
+ /* Inputs are listed first, then outputs */
+ port = of_graph_get_port_by_id(node, 1);
+
+ /*
+ * Our first output is the RGB interface where the panel will
+ * be connected.
+ */
+ for_each_child_of_node(port, child) {
+ u32 reg;
+
+ of_property_read_u32(child, "reg", ®);
+ if (reg == 0)
+ end_node = child;
+ }
+
+ if (!end_node) {
+ DRM_DEBUG_DRIVER("Missing panel endpoint\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ remote = of_graph_get_remote_port_parent(end_node);
+ if (!remote) {
+ DRM_DEBUG_DRIVER("Enable to parse remote node\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ return of_drm_find_panel(remote);
+}
+
static int sun4i_tcon_bind(struct device *dev, struct device *master,
void *data)
{
goto err_free_clocks;
}
- return 0;
+ tcon->panel = sun4i_tcon_find_panel(dev->of_node);
+ if (IS_ERR(tcon->panel)) {
+ dev_info(dev, "No panel found... RGB output disabled\n");
+ return 0;
+ }
+
+ return sun4i_rgb_init(drm);
err_free_clocks:
sun4i_tcon_free_clocks(tcon);
static int sun4i_tcon_probe(struct platform_device *pdev)
{
+ struct device_node *node = pdev->dev.of_node;
+ struct drm_panel *panel;
+
+ /*
+ * The panel is not ready.
+ * Defer the probe.
+ */
+ panel = sun4i_tcon_find_panel(node);
+ if (IS_ERR(panel)) {
+ /*
+ * If we don't have a panel endpoint, just go on
+ */
+ if (PTR_ERR(panel) != -ENODEV)
+ return -EPROBE_DEFER;
+ }
+
return component_add(&pdev->dev, &sun4i_tcon_ops);
}
projects / openwrt / staging / blogic.git / commitdiff