[RFC PATCH v2 06/20] drm/atomic: Pass crtc_color_pipeline client cap to atomic check

From: Nícolas F. R. A. Prado <[email protected]>

Pass the state of the CRTC (post-blend) color pipeline client cap to the
atomic state so that drivers can rely on it to enable color pipeline
functionality and ignore the deprecated color management CRTC
properties.

Signed-off-by: Nícolas F. R. A. Prado <[email protected]>
Co-developed-by: Ariel D'Alessandro <[email protected]>
Signed-off-by: Ariel D'Alessandro <[email protected]>
Reviewed-by: Louis Chauvet <[email protected]>
---
 drivers/gpu/drm/drm_atomic_uapi.c |  1 +
 include/drm/drm_atomic.h          | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 8f9c11bd94c6..0ee44976031e 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -1738,6 +1738,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
 	state->acquire_ctx = &ctx;
 	state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
 	state->plane_color_pipeline = file_priv->plane_color_pipeline;
+	state->crtc_color_pipeline = file_priv->crtc_color_pipeline;
 
 retry:
 	copied_objs = 0;
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 88087910ab1a..a28701704e01 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -575,6 +575,26 @@ struct drm_atomic_commit {
 	 */
 	bool plane_color_pipeline : 1;
 
+	/**
+	 * @crtc_color_pipeline:
+	 *
+	 * Indicates whether this atomic state originated with a client that
+	 * set the DRM_CLIENT_CAP_CRTC_COLOR_PIPELINE.
+	 *
+	 * Drivers and helper functions should use this to ignore legacy
+	 * properties that are incompatible with the drm_crtc COLOR_PIPELINE
+	 * behavior, such as:
+	 *
+	 *  - GAMMA_LUT
+	 *  - DEGAMMA_LUT
+	 *  - GAMMA_LUT_SIZE
+	 *  - CTM
+	 *
+	 * or any other driver-specific properties that might affect pixel
+	 * values.
+	 */
+	bool crtc_color_pipeline : 1;
+
 	/**
 	 * @colorops:
 	 *
-- 
2.53.0