drm: rockchip: analogix_dp: correct the connector display color format and bpc

Rockchip VOP couldn't output YUV video format for eDP controller, so
when driver detect connector support YUV video format, we could hack
it down to RGB888.

Change-Id: Ia876bb49e772f85bef201af2b62dd558d6b99257
Signed-off-by: Yakir Yang <ykk@rock-chips.com>

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index 8245e8dd6385bf76d02fb4239b571997f5231bd5..8bbdd79a6974e42244672d14bd1366fce1bb3d6a 100644 (file)
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -95,6 +95,27 @@ static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
        return 0;
 }
 
+static enum drm_mode_status
+rockchip_dp_mode_valid(struct analogix_dp_plat_data *plat_data,
+                      struct drm_connector *connector,
+                      struct drm_display_mode *mode)
+{
+       struct drm_display_info *di = &connector->display_info;
+       struct rockchip_dp_device *dp = to_dp(plat_data);
+
+       if (dp->plat_data.dev_type == RK3288_DP) {
+               if (di->color_formats & DRM_COLOR_FORMAT_YCRCB444 ||
+                   di->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
+                       di->color_formats &= ~(DRM_COLOR_FORMAT_YCRCB422 |
+                                              DRM_COLOR_FORMAT_YCRCB444);
+                       di->color_formats |= DRM_COLOR_FORMAT_RGB444;
+                       di->bpc = 8;
+               }
+       }
+
+       return MODE_OK;
+}
+
 static bool
 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
                                   const struct drm_display_mode *mode,
@@ -270,6 +291,7 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
        dp->plat_data.dev_type = RK3288_DP;
        dp->plat_data.power_on = rockchip_dp_poweron;
        dp->plat_data.power_off = rockchip_dp_powerdown;
+       dp->plat_data.mode_valid = rockchip_dp_mode_valid;
 
        return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
 }