drm/edid: When reset, assume HDMI displays support RGB444

If an HDMI connector has no EDID and the mode is set via the kernel command line, then drm_reset_display_info() is the only thing that will have set up any of connector->display_info. With commit 26ff1c3 ("drm/connector: hdmi: Compute bpc and format automatically"), it is now checked that DRM_COLOR_FORMAT_RGB444 is supported. Whilst it doesn't fail the request, it does log dev_warn for every commit, spamming the log. For HDMI connectors initialise the color_format field to say it supports RGB444. Signed-off-by: Dave Stevenson <[email protected]>
raspberrypi · Jan 28, 2025 · c3d28e8 · c3d28e8
1 parent 3852486
commit c3d28e8
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
@@ -6581,7 +6581,11 @@ static void drm_reset_display_info(struct drm_connector *connector)
 	info->height_mm = 0;
 
 	info->bpc = 0;
-	info->color_formats = 0;
+	if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
+	    connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
+		info->color_formats = DRM_COLOR_FORMAT_RGB444;
+	else
+		info->color_formats = 0;
 	info->cea_rev = 0;
 	info->max_tmds_clock = 0;
 	info->dvi_dual = false;