[PATCH v3 2/3] drm/bridge: dw-hdmi: truly enforce 420-only formats when drm mode demands it

Adrián Larumbe adrian.larumbe at collabora.com
Sun Jun 25 07:17:16 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>
Acked-by: Neil Armstrong <neil.armstrong at linaro.org>
---
 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 e6a456b72610..3a788316e2e5 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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