Hi Uma,
On Fri, Aug 17, 2018 at 07:48:47PM +0530, Uma Shankar wrote:
> Add plane gamma as blob property and size as a
> range property.
>
> 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.shan...@intel.com>
> ---
> Documentation/gpu/drm-kms.rst | 6 ++++++
> drivers/gpu/drm/drm_atomic.c | 9 +++++++++
> drivers/gpu/drm/drm_atomic_helper.c | 3 +++
> drivers/gpu/drm/drm_plane.c | 23 +++++++++++++++++++++++
> include/drm/drm_plane.h | 22 ++++++++++++++++++++++
> 5 files changed, 63 insertions(+)
>
> diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
> index 16d6d8d..bcf9a86 100644
> --- a/Documentation/gpu/drm-kms.rst
> +++ b/Documentation/gpu/drm-kms.rst
> @@ -563,6 +563,12 @@ Plane Color Management Properties
> .. kernel-doc:: drivers/gpu/drm/drm_plane.c
> :doc: ctm_property
>
> +.. kernel-doc:: drivers/gpu/drm/drm_plane.c
> + :doc: gamma_lut_property
> +
> +.. kernel-doc:: drivers/gpu/drm/drm_plane.c
> + :doc: gamma_lut_size_property
> +
> Tile Group Property
> -------------------
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index ddda935..8b0bf14 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -925,6 +925,13 @@ static int drm_atomic_plane_set_property(struct
> drm_plane *plane,
> &replaced);
> state->color_mgmt_changed |= replaced;
> return ret;
> + } else if (property == plane->gamma_lut_property) {
> + ret = drm_atomic_replace_property_blob_from_id(dev,
> + &state->gamma_lut,
> + val, -1, sizeof(struct drm_color_lut),
> + &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);
> @@ -998,6 +1005,8 @@ static int drm_atomic_plane_set_property(struct
> drm_plane *plane,
> state->degamma_lut->base.id : 0;
> } else if (property == plane->ctm_property) {
> *val = (state->ctm) ? state->ctm->base.id : 0;
> + } else if (property == plane->gamma_lut_property) {
> + *val = (state->gamma_lut) ? state->gamma_lut->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 866181f..f524255 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -3618,6 +3618,8 @@ void __drm_atomic_helper_plane_duplicate_state(struct
> drm_plane *plane,
> drm_property_blob_get(state->degamma_lut);
> if (state->ctm)
> drm_property_blob_get(state->ctm);
> + if (state->gamma_lut)
> + drm_property_blob_put(state->gamma_lut);
>
> state->color_mgmt_changed = false;
> }
> @@ -3667,6 +3669,7 @@ void __drm_atomic_helper_plane_destroy_state(struct
> drm_plane_state *state)
>
> drm_property_blob_put(state->degamma_lut);
> drm_property_blob_put(state->ctm);
> + drm_property_blob_put(state->gamma_lut);
> }
> 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 97520b1..d0bf10b 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -494,6 +494,15 @@ int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
> * 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
> + *
> + * gamma_lut_property:
> + * Blob property which allows a userspace to provide LUT values
> + * to apply gamma/tone-mapping curve using the h/w plane gamma
> + * processing engine, thereby making the content as non-linear
> + * or to perform any tone mapping operation for HDR usecases.
> + *
> + * gamma_lut_size_property:
> + * Range Property to indicate size of the plane gamma LUT.
> */
> int drm_plane_color_create_prop(struct drm_device *dev,
> struct drm_plane *plane)
> @@ -521,6 +530,20 @@ int drm_plane_color_create_prop(struct drm_device *dev,
> return -ENOMEM;
> plane->ctm_property = prop;
>
> + prop = drm_property_create(dev,
> + DRM_MODE_PROP_BLOB,
> + "PLANE_GAMMA_LUT", 0);
> + if (!prop)
> + return -ENOMEM;
> + plane->gamma_lut_property = prop;
> +
> + prop = drm_property_create_range(dev,
> + DRM_MODE_PROP_IMMUTABLE,
> + "PLANE_GAMMA_LUT_SIZE", 0, UINT_MAX);
> + if (!prop)
> + return -ENOMEM;
> + plane->gamma_lut_size_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 5143277..fb466b1 100644
> --- a/include/drm/drm_plane.h
> +++ b/include/drm/drm_plane.h
> @@ -191,6 +191,15 @@ struct drm_plane_state {
> struct drm_property_blob *ctm;
>
> /**
> + * @gamma_lut:
> + *
> + * Lookup table for converting pixel data after the color conversion
> + * matrix @ctm. See drm_plane_enable_color_mgmt(). The blob (if not
> + * NULL) is an array of &struct drm_color_lut_ext.
> + */
> + struct drm_property_blob *gamma_lut;
> +
> + /**
> * @commit: Tracks the pending commit to prevent use-after-free
> conditions,
> * and for async plane updates.
> *
> @@ -713,6 +722,19 @@ struct drm_plane {
> * degamma LUT.
> */
> struct drm_property *ctm_property;
> +
> + /**
> + * @plane_gamma_lut_property: Optional Plane property to set the LUT
> + * used to convert the colors, after the CTM matrix, to the common
> + * gamma space chosen for blending.
> + */
> + struct drm_property *gamma_lut_property;
> +
> + /**
> + * @plane_gamma_lut_size_property: Optional Plane property for the size
> + * of the gamma LUT as supported by the driver (read-only).
> + */
> + struct drm_property *gamma_lut_size_property;
> };
>
> #define obj_to_plane(x) container_of(x, struct drm_plane, base)
> --
> 1.9.1
>
> _______________________________________________
> dri-devel mailing list
> dri-de...@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheor...@arm.com>
--
Cheers,
Alex G
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