[PATCH 07/11] drm/colorop: Introduce HLG EOTF

[Macpaul Lin (林智斌)]

On Tue, 2025-12-23 at 16:44 -0300, Nícolas F. R. A. Prado wrote:
> Introduce definition of a hybrid log-gamma electro-optical transfer
> function for 1D Curve colorops.
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
> ---
>  drivers/gpu/drm/drm_colorop.c |  1 +
>  include/drm/drm_colorop.h     | 10 ++++++++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_colorop.c
> b/drivers/gpu/drm/drm_colorop.c
> index fafe45b93ff8..a19e03fb9c7c 100644
> --- a/drivers/gpu/drm/drm_colorop.c
> +++ b/drivers/gpu/drm/drm_colorop.c
> @@ -79,6 +79,7 @@ static const char * const
> colorop_curve_1d_type_names[] = {
>         [DRM_COLOROP_1D_CURVE_BT2020_OETF] = "BT.2020 OETF",
>         [DRM_COLOROP_1D_CURVE_GAMMA22] = "Gamma 2.2",
>         [DRM_COLOROP_1D_CURVE_GAMMA22_INV] = "Gamma 2.2 Inverse",
> +       [DRM_COLOROP_1D_CURVE_HLG_EOTF] = "HLG",
>  };
> 
>  static const struct drm_prop_enum_list
> drm_colorop_lut1d_interpolation_list[] = {
> diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
> index ee6454b08b2d..8ec98521607d 100644
> --- a/include/drm/drm_colorop.h
> +++ b/include/drm/drm_colorop.h
> @@ -126,6 +126,16 @@ enum drm_colorop_curve_1d_type {
>          * The inverse of &DRM_COLOROP_1D_CURVE_GAMMA22
>          */
>         DRM_COLOROP_1D_CURVE_GAMMA22_INV,
> +
> +       /**
> +        * @DRM_COLOROP_1D_CURVE_HLG_EOTF:
> +        *
> +        * enum string "HLG"
> +        *
> +        * Hybrid log-gamma transfer function.
> +        */
> +       DRM_COLOROP_1D_CURVE_HLG_EOTF,
> +
>         /**
>          * @DRM_COLOROP_1D_CURVE_COUNT:
>          *
> 
> --
> 2.51.0
> 
> 

Reviewed-by: Macpaul Lin <macpaul.lin at mediatek.com>

Best regards,
Macpaul Lin