drm: Use drm_mode_is_420_only() instead of open coding it

Replace the open coded drm_mode_is_420_only() with the real thing.

No functional changes.

Cc: Werner Sembach <wse@tuxedocomputers.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210504102742.7005-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 33a93fa..12fcbb7 100644 (file)
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1176,16 +1176,11 @@ enum drm_mode_status
 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
                           struct drm_connector *connector)
 {
-       u8 vic = drm_match_cea_mode(mode);
-       enum drm_mode_status status = MODE_OK;
-       struct drm_hdmi_info *hdmi = &connector->display_info.hdmi;
-
-       if (test_bit(vic, hdmi->y420_vdb_modes)) {
-               if (!connector->ycbcr_420_allowed)
-                       status = MODE_NO_420;
-       }
+       if (!connector->ycbcr_420_allowed &&
+           drm_mode_is_420_only(&connector->display_info, mode))
+               return MODE_NO_420;
 
-       return status;
+       return MODE_OK;
 }
 EXPORT_SYMBOL(drm_mode_validate_ycbcr420);