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Message-Id: <20250917-mtk-post-blend-color-pipeline-v2-4-ac4471b44758@collabora.com>
Date: Wed, 17 Sep 2025 20:43:13 -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,
jadahl@...hat.com, sebastian.wick@...hat.com, shashank.sharma@....com,
agoins@...dia.com, joshua@...ggi.es, mdaenzer@...hat.com, aleixpol@....org,
xaver.hugl@...il.com, victoria@...tem76.com, uma.shankar@...el.com,
quic_naseer@...cinc.com, quic_cbraga@...cinc.com, quic_abhinavk@...cinc.com,
marcan@...can.st, Liviu.Dudau@....com, sashamcintosh@...gle.com,
chaitanya.kumar.borah@...el.com, louis.chauvet@...tlin.com,
mcanal@...lia.com, kernel@...labora.com, daniels@...labora.com,
leandro.ribeiro@...labora.com, dri-devel@...ts.freedesktop.org,
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 04/20] drm/crtc: Add COLOR_PIPELINE property
Add a COLOR_PIPELINE property to the CRTC to allow userspace to set a
post-blend color pipeline analogously to how pre-blend color pipelines
are set on planes.
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
---
drivers/gpu/drm/drm_atomic_uapi.c | 49 +++++++++++++++++++++++++++++++++++----
drivers/gpu/drm/drm_crtc.c | 33 ++++++++++++++++++++++++++
include/drm/drm_atomic_uapi.h | 2 ++
include/drm/drm_crtc.h | 11 +++++++++
4 files changed, 91 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index b7cc6945864274bedd21dd5b73494f9aae216888..063c142fd9b656e228cfc660d005a3fbb4640d32 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -287,6 +287,33 @@ drm_atomic_set_colorop_for_plane(struct drm_plane_state *plane_state,
}
EXPORT_SYMBOL(drm_atomic_set_colorop_for_plane);
+/**
+ * drm_atomic_set_colorop_for_crtc - set colorop for crtc
+ * @crtc_state: atomic state object for the crtc
+ * @colorop: colorop to use for the crtc
+ *
+ * Helper function to select the color pipeline on a crtc by setting
+ * it to the first drm_colorop element of the pipeline.
+ */
+void
+drm_atomic_set_colorop_for_crtc(struct drm_crtc_state *crtc_state,
+ struct drm_colorop *colorop)
+{
+ struct drm_crtc *crtc = crtc_state->crtc;
+
+ if (colorop)
+ drm_dbg_atomic(crtc->dev,
+ "Set [COLOROP:%d] for [CRTC:%d:%s] state %p\n",
+ colorop->base.id, crtc->base.id, crtc->name,
+ crtc_state);
+ else
+ drm_dbg_atomic(crtc->dev,
+ "Set [NOCOLOROP] for [CRTC:%d:%s] state %p\n",
+ crtc->base.id, crtc->name, crtc_state);
+
+ crtc_state->color_pipeline = colorop;
+}
+EXPORT_SYMBOL(drm_atomic_set_colorop_for_crtc);
/**
* drm_atomic_set_crtc_for_connector - set CRTC for connector
@@ -396,8 +423,8 @@ static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state,
}
static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
- struct drm_crtc_state *state, struct drm_property *property,
- uint64_t val)
+ struct drm_crtc_state *state, struct drm_file *file_priv,
+ struct drm_property *property, uint64_t val)
{
struct drm_device *dev = crtc->dev;
struct drm_mode_config *config = &dev->mode_config;
@@ -406,7 +433,17 @@ static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
if (property == config->prop_active)
state->active = val;
- else if (property == config->prop_mode_id) {
+ else if (property == crtc->color_pipeline_property) {
+ /* find DRM colorop object */
+ struct drm_colorop *colorop = NULL;
+
+ colorop = drm_colorop_find(dev, file_priv, val);
+
+ if (val && !colorop)
+ return -EACCES;
+
+ drm_atomic_set_colorop_for_crtc(state, colorop);
+ } else if (property == config->prop_mode_id) {
struct drm_property_blob *mode =
drm_property_lookup_blob(dev, val);
ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
@@ -487,6 +524,8 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc,
*val = 0;
else if (property == crtc->scaling_filter_property)
*val = state->scaling_filter;
+ else if (property == crtc->color_pipeline_property)
+ *val = (state->color_pipeline) ? state->color_pipeline->base.id : 0;
else if (crtc->funcs->atomic_get_property)
return crtc->funcs->atomic_get_property(crtc, state, property, val);
else {
@@ -1047,6 +1086,8 @@ int drm_atomic_get_property(struct drm_mode_object *obj,
if (colorop->plane)
WARN_ON(!drm_modeset_is_locked(&colorop->plane->mutex));
+ else if (colorop->crtc)
+ WARN_ON(!drm_modeset_is_locked(&colorop->crtc->mutex));
ret = drm_atomic_colorop_get_property(colorop,
colorop->state, property, val);
@@ -1204,7 +1245,7 @@ int drm_atomic_set_property(struct drm_atomic_state *state,
}
ret = drm_atomic_crtc_set_property(crtc,
- crtc_state, prop, prop_value);
+ crtc_state, file_priv, prop, prop_value);
break;
}
case DRM_MODE_OBJECT_PLANE: {
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 94e60cffd29972aa979ac2f1932be7a6a97f3ada..94238163ff1254c721df39c030bc99a31d3bb92a 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1003,3 +1003,36 @@ drm_common_create_color_pipeline_property(struct drm_device *dev, struct drm_mod
kfree(all_pipelines);
return prop;
}
+
+/**
+ * drm_crtc_create_color_pipeline_property - create a new color pipeline
+ * property
+ *
+ * @crtc: drm CRTC
+ * @pipelines: list of pipelines
+ * @num_pipelines: number of pipelines
+ *
+ * Create the COLOR_PIPELINE CRTC property to specify color pipelines on
+ * the CRTC.
+ *
+ * RETURNS:
+ * Zero for success or -errno
+ */
+int drm_crtc_create_color_pipeline_property(struct drm_crtc *crtc,
+ const struct drm_prop_enum_list *pipelines,
+ int num_pipelines)
+{
+ struct drm_property *prop;
+
+ prop = drm_common_create_color_pipeline_property(crtc->dev,
+ &crtc->base,
+ pipelines,
+ num_pipelines);
+ if (IS_ERR(prop))
+ return PTR_ERR(prop);
+
+ crtc->color_pipeline_property = prop;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_crtc_create_color_pipeline_property);
diff --git a/include/drm/drm_atomic_uapi.h b/include/drm/drm_atomic_uapi.h
index 4363155233267b93767c895fa6085544e2277442..4dc191f6f929d73deee9812025c48275a33cf770 100644
--- a/include/drm/drm_atomic_uapi.h
+++ b/include/drm/drm_atomic_uapi.h
@@ -52,6 +52,8 @@ void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
struct drm_framebuffer *fb);
void drm_atomic_set_colorop_for_plane(struct drm_plane_state *plane_state,
struct drm_colorop *colorop);
+void drm_atomic_set_colorop_for_crtc(struct drm_crtc_state *crtc_state,
+ struct drm_colorop *colorop);
int __must_check
drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
struct drm_crtc *crtc);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 77c0c04a5910a2263923e06cf37535697e20e1c9..df03637ca25abd45e96b5944229297f776fd046d 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1096,6 +1096,14 @@ struct drm_crtc {
*/
struct drm_property *scaling_filter_property;
+ /**
+ * @color_pipeline_property:
+ *
+ * Optional "COLOR_PIPELINE" enum property for specifying
+ * a color pipeline to use on the CRTC.
+ */
+ struct drm_property *color_pipeline_property;
+
/**
* @state:
*
@@ -1331,5 +1339,8 @@ static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev,
int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc,
unsigned int supported_filters);
+int drm_crtc_create_color_pipeline_property(struct drm_crtc *crtc,
+ const struct drm_prop_enum_list *pipelines,
+ int num_pipelines);
bool drm_crtc_in_clone_mode(struct drm_crtc_state *crtc_state);
#endif /* __DRM_CRTC_H__ */
--
2.50.1
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