[PATCH 2/3] dw-hdmi: truly enforce 420-only formats when drm mode demands it

Adrián Larumbe adrian.larumbe at collabora.com
Sun May 28 07:00:00 PDT 2023


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 at collabora.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index d59a547f9cb2..1afb8f2603a0 100644
--- 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;
+		}
 	}
 
 	/*
-- 
2.40.0




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