From 3ced1c68751299c0cdf6a1ceeafdbe77db7d4956 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Sat, 19 Oct 2024 00:49:12 +0300
Subject: [PATCH] drm/display: bridge_connector: handle ycbcr_420_allowed
Follow the interlace_allowed example and calculate drm_connector's
ycbcr_420_allowed flag as AND of all drm_bridge's ycbcr_420_allowed
flags in a chain. This is one of the gaps between several
bridge-specific connector implementations and drm_bridge_connector.
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241019-bridge-yuv420-v1-1-d74efac9e4e6@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
drivers/gpu/drm/display/drm_bridge_connector.c | 6 ++++--
include/drm/drm_bridge.h | 5 +++++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/drm/display/drm_bridge_connector.c
index 3da5b8bf8259f..320c297008aaa 100644
--- a/drivers/gpu/drm/display/drm_bridge_connector.c
+++ b/drivers/gpu/drm/display/drm_bridge_connector.c
@@ -397,11 +397,11 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
bridge_connector->encoder = encoder;
/*
- * TODO: Handle doublescan_allowed, stereo_allowed and
- * ycbcr_420_allowed.
+ * TODO: Handle doublescan_allowed and stereo_allowed.
*/
connector = &bridge_connector->base;
connector->interlace_allowed = true;
+ connector->ycbcr_420_allowed = true;
/*
* Initialise connector status handling. First locate the furthest
@@ -414,6 +414,8 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
drm_for_each_bridge_in_chain(encoder, bridge) {
if (!bridge->interlace_allowed)
connector->interlace_allowed = false;
+ if (!bridge->ycbcr_420_allowed)
+ connector->ycbcr_420_allowed = false;
if (bridge->ops & DRM_BRIDGE_OP_EDID)
bridge_connector->bridge_edid = bridge;
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 75019d16be643..e8d735b7f6a48 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -802,6 +802,11 @@ struct drm_bridge {
* modes.
*/
bool interlace_allowed;
+ /**
+ * @ycbcr_420_allowed: Indicate that the bridge can handle YCbCr 420
+ * output.
+ */
+ bool ycbcr_420_allowed;
/**
* @pre_enable_prev_first: The bridge requires that the prev
* bridge @pre_enable function is called before its @pre_enable,
--
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