[v2 05/25] drm: Add Color ops capability property

[Dmitry Baryshkov]

On Tue, Nov 26, 2024 at 06:57:10PM +0530, Uma Shankar wrote:
> Add capability property which a colorop can expose it's
> hardware's abilities. It's a blob property that can be
> filled with respective data structures depending on the
> colorop. The user space is expected to read this property
> and program the colorop accordingly.

If it's a blob, where is its contents documented? Also please point out
the non-IGT userspace implementation that uses the property.

> 
> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
> ---
>  drivers/gpu/drm/drm_atomic_uapi.c |  3 +++
>  include/drm/drm_colorop.h         | 12 ++++++++++++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index ba68358c0ffe..46cc7b0df6e8 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -780,6 +780,9 @@ drm_atomic_colorop_get_property(struct drm_colorop *colorop,
>  		*val = state->size;
>  	} else if (property == colorop->data_property) {
>  		*val = (state->data) ? state->data->base.id : 0;
> +	} else if (property == colorop->hw_caps_property) {
> +		*val = state->hw_caps ?
> +			state->hw_caps->base.id : 0;
>  	} else {
>  		return -EINVAL;
>  	}
> diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
> index 56b51fafebdf..58e5b87c6d56 100644
> --- a/include/drm/drm_colorop.h
> +++ b/include/drm/drm_colorop.h
> @@ -146,6 +146,11 @@ struct drm_colorop_state {
>  	 * Number of entries of the custom LUT. This should be read-only.
>  	 */
>  	uint32_t size;
> +	/**
> +	 * @hw_caps:
> +	 *
> +	 */
> +	struct drm_property_blob *hw_caps;
>  
>  	/**
>  	 * @lut_3d_modes:
> @@ -297,6 +302,13 @@ struct drm_colorop {
>  	 */
>  	struct drm_property *curve_1d_type_property;
>  
> +	/**
> +	 * @hwlut_caps_property:
> +	 *
> +	 * Property to expose hardware lut capbilities.
> +	 */
> +	struct drm_property *hw_caps_property;
> +
>  	/**
>  	 * @multiplier_property:
>  	 *
> -- 
> 2.42.0
> 

-- 
With best wishes
Dmitry