fre 2018-08-17 klockan 19:48 +0530 skrev Uma Shankar:
> Add a blob property for plane CSC usage.
>
> v2: Rebase
>
> v3: Fixed Sean, Paul's review comments. Moved the property from
> mode_config to drm_plane. Created a helper function to instantiate
> these properties and removed from drm_mode_create_standard_properties
> Added property documentation as suggested by Daniel, Vetter.
>
> v4: Rebase
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> ---
> Documentation/gpu/drm-kms.rst | 3 +++
> drivers/gpu/drm/drm_atomic.c | 10 ++++++++++
> drivers/gpu/drm/drm_atomic_helper.c | 4 ++++
> drivers/gpu/drm/drm_plane.c | 12 ++++++++++++
> include/drm/drm_plane.h | 15 +++++++++++++++
> 5 files changed, 44 insertions(+)
>
> diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-
> kms.rst
> index 8b10b12..16d6d8d 100644
> --- a/Documentation/gpu/drm-kms.rst
> +++ b/Documentation/gpu/drm-kms.rst
> @@ -560,6 +560,9 @@ Plane Color Management Properties
> .. kernel-doc:: drivers/gpu/drm/drm_plane.c
> :doc: degamma_lut_size_property
>
> +.. kernel-doc:: drivers/gpu/drm/drm_plane.c
> + :doc: ctm_property
> +
> Tile Group Property
> -------------------
>
> diff --git a/drivers/gpu/drm/drm_atomic.c
> b/drivers/gpu/drm/drm_atomic.c
> index f8cad9b..ddda935 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -917,6 +917,14 @@ static int drm_atomic_plane_set_property(struct
> drm_plane *plane,
> &replaced);
> state->color_mgmt_changed |= replaced;
> return ret;
> + } else if (property == plane->ctm_property) {
> + ret = drm_atomic_replace_property_blob_from_id(dev,
> + &state->ctm,
> + val,
> + sizeof(struct
> drm_color_ctm), -1,
> + &replaced);
> + state->color_mgmt_changed |= replaced;
> + return ret;
> } else if (plane->funcs->atomic_set_property) {
> return plane->funcs->atomic_set_property(plane,
> state,
> property, val);
> @@ -988,6 +996,8 @@ static int drm_atomic_plane_set_property(struct
> drm_plane *plane,
> } else if (property == plane->degamma_lut_property) {
> *val = (state->degamma_lut) ?
> state->degamma_lut->base.id : 0;
> + } else if (property == plane->ctm_property) {
> + *val = (state->ctm) ? state->ctm->base.id : 0;
> } else if (plane->funcs->atomic_get_property) {
> return plane->funcs->atomic_get_property(plane,
> state, property, val);
> } else {
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c
> b/drivers/gpu/drm/drm_atomic_helper.c
> index 67c5b51..866181f 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -3616,6 +3616,9 @@ void
> __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
>
> if (state->degamma_lut)
> drm_property_blob_get(state->degamma_lut);
> + if (state->ctm)
> + drm_property_blob_get(state->ctm);
> +
> state->color_mgmt_changed = false;
> }
> EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
> @@ -3663,6 +3666,7 @@ void
> __drm_atomic_helper_plane_destroy_state(struct drm_plane_state
> *state)
> drm_crtc_commit_put(state->commit);
>
> drm_property_blob_put(state->degamma_lut);
> + drm_property_blob_put(state->ctm);
> }
> EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
>
> diff --git a/drivers/gpu/drm/drm_plane.c
> b/drivers/gpu/drm/drm_plane.c
> index 03e0560..97520b1 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -489,6 +489,11 @@ int drm_mode_plane_set_obj_prop(struct drm_plane
> *plane,
> *
> * degamma_lut_size_property:
> * Range Property to indicate size of the plane degamma LUT.
> + *
> + * ctm_property:
> + * Blob property which allows a userspace to provide CTM
> coefficients
> + * to do color space conversion or any other enhancement by
> doing a
> + * matrix multiplication using the h/w CTM processing engine
> */
> int drm_plane_color_create_prop(struct drm_device *dev,
> struct drm_plane *plane)
> @@ -509,6 +514,13 @@ int drm_plane_color_create_prop(struct
> drm_device *dev,
> return -ENOMEM;
> plane->degamma_lut_size_property = prop;
>
> + prop = drm_property_create(dev,
> + DRM_MODE_PROP_BLOB,
> + "PLANE_CTM", 0);
> + if (!prop)
> + return -ENOMEM;
> + plane->ctm_property = prop;
> +
> return 0;
> }
> EXPORT_SYMBOL(drm_plane_color_create_prop);
> diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
> index 28357ac..5143277 100644
> --- a/include/drm/drm_plane.h
> +++ b/include/drm/drm_plane.h
> @@ -183,6 +183,14 @@ struct drm_plane_state {
> struct drm_property_blob *degamma_lut;
>
> /**
> + * @ctm:
> + *
> + * Color transformation matrix. See
> drm_plane_enable_color_mgmt(). The
> + * blob (if not NULL) is a &struct drm_color_ctm.
> + */
> + struct drm_property_blob *ctm;
> +
> + /**
> * @commit: Tracks the pending commit to prevent use-after-
> free conditions,
> * and for async plane updates.
> *
> @@ -698,6 +706,13 @@ struct drm_plane {
> * size of the degamma LUT as supported by the driver (read-
> only).
> */
> struct drm_property *degamma_lut_size_property;
> +
> + /**
> + * @plane_ctm_property: Optional Plane property to set the
> + * matrix used to convert colors after the lookup in the
> + * degamma LUT.
> + */
> + struct drm_property *ctm_property;
>
I'm assuming degamma is done before converting with CTM.
But how does this interact with YUV formats? I'm not sure this is
explicitly defined. I'm assuming R->Cr G -> Y, B = Cb for degamma
tables.
There's also a enum drm_color_encoding and a enum drm_color_range. Are
these ignored if CTM is set? Would be good to mention at least.
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