[Intel-gfx] [PATCH 1/3] drm/i915/xelpd: Enable Pipe color support for D13 platform

[Ville Syrjälä]

On Wed, Nov 24, 2021 at 01:06:47AM +0530, Uma Shankar wrote:
> Enable pipe color support for Display 13 platforms. Currently
> limit to just 10bit gamma and later extend it for logarithmic
> gamma, once the new UAPI is agreed by community and implemented
> by a userspace consumer.
> 
> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_color.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
> index c870a0e50cb1..e529dbeee525 100644
> --- a/drivers/gpu/drm/i915/display/intel_color.c
> +++ b/drivers/gpu/drm/i915/display/intel_color.c
> @@ -1574,6 +1574,8 @@ static int glk_color_check(struct intel_crtc_state *crtc_state)
>  
>  static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
>  {
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);

s/dev_priv/i915/ for new stuff please.

>  	u32 gamma_mode = 0;
>  
>  	if (crtc_state->hw.degamma_lut)
> @@ -1586,6 +1588,13 @@ static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
>  	if (!crtc_state->hw.gamma_lut ||
>  	    crtc_state_is_legacy_gamma(crtc_state))
>  		gamma_mode |= GAMMA_MODE_MODE_8BIT;
> +	/*
> +	 * Enable 10bit gamma for D13
> +	 * ToDo: Extend to Logarithmic Gamma once the new UAPI
> +	 * is acccepted and implemented by a userspace consumer
> +	 */
> +	else if (DISPLAY_VER(dev_priv) >= 13)
> +		gamma_mode |= GAMMA_MODE_MODE_10BIT;

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

>  	else
>  		gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
>  
> -- 
> 2.25.1

-- 
Ville Syrjälä
Intel