linux-kernel - [PATCH RFC v2 02/20] drm/colorop: Allow parenting colorop to CRTC

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Message-Id: <20250917-mtk-post-blend-color-pipeline-v2-2-ac4471b44758@collabora.com>
Date: Wed, 17 Sep 2025 20:43:11 -0400
From: Nícolas F. R. A. Prado <nfraprado@...labora.com>
To: 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>, 
 Chun-Kuang Hu <chunkuang.hu@...nel.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, 
 Melissa Wen <melissa.srw@...il.com>
Cc: Alex Hung <alex.hung@....com>, wayland-devel@...ts.freedesktop.org, 
 harry.wentland@....com, leo.liu@....com, ville.syrjala@...ux.intel.com, 
 pekka.paalanen@...labora.com, contact@...rsion.fr, mwen@...lia.com, 
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 chaitanya.kumar.borah@...el.com, louis.chauvet@...tlin.com, 
 mcanal@...lia.com, kernel@...labora.com, daniels@...labora.com, 
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 linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Nícolas F. R. A. Prado <nfraprado@...labora.com>, 
 Simona Vetter <simona.vetter@...ll.ch>
Subject: [PATCH RFC v2 02/20] drm/colorop: Allow parenting colorop to CRTC

In order to allow for post-blend color pipelines, colorops need to be
assigned to a crtc rather than a plane. Add a crtc to the colorop
struct to enable this. Either the plane or the crtc will be set for any
given colorop depending on whether it is part of a pre- or post-blend
color pipeline.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
---
 include/drm/drm_colorop.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index d61c6c40e47162cb8b1e7db58b6746c43ac5d202..7a4e0d0c4a3d594abecef304b1d5990434cdb231 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -206,10 +206,16 @@ struct drm_colorop {
 	/**
 	 * @plane:
 	 *
-	 * The plane on which the colorop sits. A drm_colorop is always unique
-	 * to a plane.
+	 * The plane on which the colorop sits if it is a pre-blend colorop.
+	 * In this case it is unique to the plane.
+	 *
+	 * @crtc:
+	 *
+	 * The CRTC on which the colorop sits if it is a post-blend colorop.
+	 * In this case it is unique to the CRTC.
 	 */
 	struct drm_plane *plane;
+	struct drm_crtc *crtc;

 	/**
 	 * @state:

-- 
2.50.1