linux-kernel - [PATCH v4 05/10] drm/bridge: dw-hdmi-qp: Set bridge supported

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Message-Id: <20251117-color-format-v4-5-0ded72bd1b00@collabora.com>
Date: Mon, 17 Nov 2025 20:11:49 +0100
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Harry Wentland <harry.wentland@....com>, Leo Li <sunpeng.li@....com>, 
 Rodrigo Siqueira <siqueira@...lia.com>, 
 Alex Deucher <alexander.deucher@....com>, 
 Christian König <christian.koenig@....com>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 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>, 
 Sandy Huang <hjc@...k-chips.com>, 
 Heiko Stübner <heiko@...ech.de>, 
 Andy Yan <andy.yan@...k-chips.com>, 
 Jani Nikula <jani.nikula@...ux.intel.com>, 
 Rodrigo Vivi <rodrigo.vivi@...el.com>, 
 Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, 
 Tvrtko Ursulin <tursulin@...ulin.net>
Cc: kernel@...labora.com, amd-gfx@...ts.freedesktop.org, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 intel-gfx@...ts.freedesktop.org, intel-xe@...ts.freedesktop.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH v4 05/10] drm/bridge: dw-hdmi-qp: Set bridge
 supported_formats

The drm_bridge "supported_formats" member stores a bitmask of supported
HDMI output formats if the bridge is in fact an HDMI bridge.

However, until now, the synopsys dw-hdmi-qp driver did not set this
member in the bridge it creates.

Set it based on the platform data's supported_formats member, and
default to BIT(HDMI_COLORSPACE_RGB) if it's absent, which preserves the
previous behaviour.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
index fe4c026280f0..cf888236bd65 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
@@ -1269,6 +1269,11 @@ struct dw_hdmi_qp *dw_hdmi_qp_bind(struct platform_device *pdev,
 		dev_warn(dev, "Set ref_clk_rate to vendor default\n");
 	}
 
+	if (plat_data->supported_formats)
+		hdmi->bridge.supported_formats = plat_data->supported_formats;
+	else
+		hdmi->bridge.supported_formats = BIT(HDMI_COLORSPACE_RGB);
+
 	dw_hdmi_qp_init_hw(hdmi);
 
 	ret = devm_request_threaded_irq(dev, plat_data->main_irq,

-- 
2.51.2