linux-kernel - [PATCH 3/6] drm/bridge: display-connector: allow YCbCr 420 for HDMI and DP

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Message-Id: <20241019-bridge-yuv420-v1-3-d74efac9e4e6@linaro.org>
Date: Sat, 19 Oct 2024 00:49:14 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org
Subject: [PATCH 3/6] drm/bridge: display-connector: allow YCbCr 420 for
 HDMI and DP

Allow YCbCr 420 output for HDMI and DisplayPort connectors. Other
bridges in the chain still might limit YCbCr 420 support on the
corresponding connector.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/gpu/drm/bridge/display-connector.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c
index ab8e00baf3f1..aab9ce7be94c 100644
--- a/drivers/gpu/drm/bridge/display-connector.c
+++ b/drivers/gpu/drm/bridge/display-connector.c
@@ -270,6 +270,10 @@ static int display_connector_probe(struct platform_device *pdev)
 	/* All the supported connector types support interlaced modes. */
 	conn->bridge.interlace_allowed = true;
 
+	if (type == DRM_MODE_CONNECTOR_HDMIA ||
+	    type == DRM_MODE_CONNECTOR_DisplayPort)
+		conn->bridge.ycbcr_420_allowed = true;
+
 	/* Get the optional connector label. */
 	of_property_read_string(pdev->dev.of_node, "label", &label);
 

-- 
2.39.5