drm/bridge: dw-hdmi: truly enforce 420-only formats when drm mode demands it

The current output bus format selection logic is enforcing YUV420 even
when the drm mode allows for other bus formats as well.
Fix it by adding check for 420-only drm modes.

Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/6e6a217c180584a67ed7992c785764ba54af9151.1687702042.git.adrian.larumbe@collabora.com

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 8e1a9854ebc01f6547cdc8d3da92a9a9fe63719b..55281f63a186720b82b112f4ec97e407d399acfc 100644 (file)
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2710,9 +2710,10 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
                /* Default 8bit fallback */
                output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
 
-               *num_output_fmts = i;
-
-               return output_fmts;
+               if (drm_mode_is_420_only(info, mode)) {
+                       *num_output_fmts = i;
+                       return output_fmts;
+               }
        }
 
        /*