drm/bridge/synopsys: dw-hdmi: Use bridge->mode_valid() callback

Now that we have a callback to check if bridge supports a given mode
we can use it in Synopsys Designware HDMI bridge so that we restrict
the number of probbed modes to the ones we can actually display.

Also, there is no need to use mode_fixup() callback as mode_valid()
will handle the mode validation.

NOTE: I also had to change the pdata declaration of mode_valid
custom callback so that the passed modes are const. I also changed
in the platforms I found. Not even compiled it though.

Signed-off-by: Jose Abreu <[e-mail]>
Acked-by: Neil Armstrong <[e-mail]>
Acked-by: Philipp Zabel <[e-mail]>
Cc: Carlos Palminha <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: Archit Taneja <[e-mail]>
Cc: Andrzej Hajda <[e-mail]>
Cc: Laurent Pinchart <[e-mail]>
Cc: David Airlie <[e-mail]>
Cc: Philipp Zabel <[e-mail]>
Cc: Carlo Caione <[e-mail]>
Cc: Kevin Hilman <[e-mail]>
Cc: Mark Yao <[e-mail]>
Cc: Heiko Stuebner <[e-mail]>
Signed-off-by: Archit Taneja <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

···
 	return ret;
 }
 
-static enum drm_mode_status
-dw_hdmi_connector_mode_valid(struct drm_connector *connector,
-			     struct drm_display_mode *mode)
-{
-	struct dw_hdmi *hdmi = container_of(connector,
-					   struct dw_hdmi, connector);
-	enum drm_mode_status mode_status = MODE_OK;
-
-	/* We don't support double-clocked modes */
-	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
-		return MODE_BAD;
-
-	if (hdmi->plat_data->mode_valid)
-		mode_status = hdmi->plat_data->mode_valid(connector, mode);
-
-	return mode_status;
-}
-
 static void dw_hdmi_connector_force(struct drm_connector *connector)
 {
 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
···
 
 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
 	.get_modes = dw_hdmi_connector_get_modes,
-	.mode_valid = dw_hdmi_connector_mode_valid,
 	.best_encoder = drm_atomic_helper_best_encoder,
 };
 
···
 	return 0;
 }
 
-static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
-				      const struct drm_display_mode *orig_mode,
-				      struct drm_display_mode *mode)
+static enum drm_mode_status
+dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
+			  const struct drm_display_mode *mode)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 	struct drm_connector *connector = &hdmi->connector;
-	enum drm_mode_status status;
+	enum drm_mode_status mode_status = MODE_OK;
 
-	status = dw_hdmi_connector_mode_valid(connector, mode);
-	if (status != MODE_OK)
-		return false;
-	return true;
+	/* We don't support double-clocked modes */
+	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+		return MODE_BAD;
+
+	if (hdmi->plat_data->mode_valid)
+		mode_status = hdmi->plat_data->mode_valid(connector, mode);
+
+	return mode_status;
 }
 
 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
···
 	.enable = dw_hdmi_bridge_enable,
 	.disable = dw_hdmi_bridge_disable,
 	.mode_set = dw_hdmi_bridge_mode_set,
-	.mode_fixup = dw_hdmi_bridge_mode_fixup,
+	.mode_valid = dw_hdmi_bridge_mode_valid,
 };
 
 static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi)

drivers/gpu/drm/imx/dw_hdmi-imx.c

···
 	.destroy = drm_encoder_cleanup,
 };
 
-static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
-						  struct drm_display_mode *mode)
+static enum drm_mode_status
+imx6q_hdmi_mode_valid(struct drm_connector *con,
+		      const struct drm_display_mode *mode)
 {
 	if (mode->clock < 13500)
 		return MODE_CLOCK_LOW;
···
 	return MODE_OK;
 }
 
-static enum drm_mode_status imx6dl_hdmi_mode_valid(struct drm_connector *con,
-						   struct drm_display_mode *mode)
+static enum drm_mode_status
+imx6dl_hdmi_mode_valid(struct drm_connector *con,
+		       const struct drm_display_mode *mode)
 {
 	if (mode->clock < 13500)
 		return MODE_CLOCK_LOW;

drivers/gpu/drm/meson/meson_dw_hdmi.c

···
 }
 
 /* TOFIX Enable support for non-vic modes */
-static enum drm_mode_status dw_hdmi_mode_valid(struct drm_connector *connector,
-					       struct drm_display_mode *mode)
+static enum drm_mode_status
+dw_hdmi_mode_valid(struct drm_connector *connector,
+		   const struct drm_display_mode *mode)
 {
 	unsigned int vclk_freq;
 	unsigned int venc_freq;

drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

···
 
 static enum drm_mode_status
 dw_hdmi_rockchip_mode_valid(struct drm_connector *connector,
-			    struct drm_display_mode *mode)
+			    const struct drm_display_mode *mode)
 {
 	const struct dw_hdmi_mpll_config *mpll_cfg = rockchip_mpll_cfg;
 	int pclk = mode->clock * 1000;

include/drm/bridge/dw_hdmi.h

···
 struct dw_hdmi_plat_data {
 	struct regmap *regm;
 	enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
-					   struct drm_display_mode *mode);
+					   const struct drm_display_mode *mode);
 	unsigned long input_bus_format;
 	unsigned long input_bus_encoding;