linux-kernel - [PATCH 1/5] drm/rockchip: vop2: Add high color depth support

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Message-Id: <20250721-rk3588-10bpc-v1-1-e95a4abcf482@collabora.com>
Date: Mon, 21 Jul 2025 20:39:04 +0300
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Sandy Huang <hjc@...k-chips.com>, 
 Heiko Stübner <heiko@...ech.de>, 
 Andy Yan <andy.yan@...k-chips.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>, 
 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>
Cc: kernel@...labora.com, dri-devel@...ts.freedesktop.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] drm/rockchip: vop2: Add high color depth support

Take the bits per color channel into consideration when computing DCLK
rate.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 186f6452a7d359f079662bc580850929632ea8fe..a714bcbb02de16267e7febbaeb1eb270c70aaef2 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -1731,6 +1731,9 @@ static void vop2_crtc_atomic_enable(struct drm_crtc *crtc,
 		clock *= 2;
 	}
 
+	if (vcstate->output_bpc > 8)
+		clock = DIV_ROUND_CLOSEST(clock * vcstate->output_bpc, 8);
+
 	vop2_vp_write(vp, RK3568_VP_MIPI_CTRL, 0);
 
 	/*

-- 
2.50.0