Subject: [PATCH v14 02/28] drm/display: hdmi-state-helper: Use default case for unsupported formats

From: Nicolas Frattaroli <[email-masked]>
Date: Thu, 23 Apr 2026 21:03:25 +0200

Switch statements that do not handle all possible values of an
enumeration will generate a warning during compilation. In preparation
for adding a COUNT value to the end of the enum, this needs to be dealt
with.

Add a default case to sink_supports_format_bpc's DRM_OUTPUT_COLOR_FORMAT
switch statement, and move the log-and-return unknown pixel format
handling into it.

No functional change.

Reviewed-by: Maxime Ripard <[email-masked]>
Reviewed-by: Cristian Ciocaltea <[email-masked]>
Signed-off-by: Nicolas Frattaroli <[email-masked]>
---
 drivers/gpu/drm/display/drm_hdmi_state_helper.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
index 9f3b696aceeb..a0d88701d236 100644
--- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c
+++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
@@ -541,10 +541,11 @@ sink_supports_format_bpc(const struct drm_connector *connector,
 		drm_dbg_kms(dev, "YUV444 format supported in that configuration.\n");
 
 		return true;
-	}
 
-	drm_dbg_kms(dev, "Unsupported pixel format.\n");
-	return false;
+	default:
+		drm_dbg_kms(dev, "Unsupported pixel format.\n");
+		return false;
+	}
 }
 
 static enum drm_mode_status

-- 
2.53.0