linux-kernel - [PATCH v6 13/21] drm/rockchip: vop2: Set correct output format for RK3576 YUV422

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Message-Id: <20260121-color-format-v6-13-7b81a771cd0b@collabora.com>
Date: Wed, 21 Jan 2026 14:45:39 +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>, Dmitry Baryshkov <lumag@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, Rob Herring <robh@...nel.org>, 
 Jonathan Corbet <corbet@....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, 
 linux-doc@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH v6 13/21] drm/rockchip: vop2: Set correct output format for
 RK3576 YUV422

For RK3576 to be able to output YUV422 signals, it first needs to be
able to pick the right output mode in the display controller to do so.

The RK3576 hardware specifies different output formats depending on the
used display protocol.

Adjust the written register value based on the SoC and connector, so
other users of vcstate->output_mode don't have to care about this.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 3dd7b7571487..d93c6779286e 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -1706,6 +1706,22 @@ static void vop2_crtc_atomic_enable(struct drm_crtc *crtc,
 	if (vcstate->output_mode == ROCKCHIP_OUT_MODE_AAAA &&
 	    !(vp_data->feature & VOP2_VP_FEATURE_OUTPUT_10BIT))
 		out_mode = ROCKCHIP_OUT_MODE_P888;
+	else if (vcstate->output_mode == ROCKCHIP_OUT_MODE_YUV422 &&
+		 vop2->version == VOP_VERSION_RK3576)
+		switch (vcstate->output_type) {
+		case DRM_MODE_CONNECTOR_DisplayPort:
+		case DRM_MODE_CONNECTOR_eDP:
+			out_mode = ROCKCHIP_OUT_MODE_YUV422_RK3576_DP;
+			break;
+		case DRM_MODE_CONNECTOR_HDMIA:
+			out_mode = ROCKCHIP_OUT_MODE_YUV422_RK3576_HDMI;
+			break;
+		default:
+			drm_err(vop2->drm, "Unknown DRM_MODE_CONNECTOR %d\n",
+				vcstate->output_type);
+			vop2_unlock(vop2);
+			return;
+		}
 	else
 		out_mode = vcstate->output_mode;
 

-- 
2.52.0