Re: [Intel-gfx] [PATCH 15/20] drm/i915: Make ilk_load_luts() deal with degamma

["Shankar, Uma" <uma.shankar@intel.com>]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@lists.freedesktop.org> On Behalf Of Ville
> Syrjala
> Sent: Saturday, July 18, 2020 2:44 AM
> To: intel-gfx@lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH 15/20] drm/i915: Make ilk_load_luts() deal with
> degamma
> 
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Make ilk_load_luts() ready for a degamma lut. Currently we never have one, but
> soon we may get one from readout, and I think we may want to change the state
> computation such that we may end up with one even when userspace has simply
> supplied a gamma lut.
> 
> At least the code now follows the path laid out by the ivb/bdw counterpars.

Sounds good.
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_color.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_color.c
> b/drivers/gpu/drm/i915/display/intel_color.c
> index d5ce58c3bc11..12a41fb4a98c 100644
> --- a/drivers/gpu/drm/i915/display/intel_color.c
> +++ b/drivers/gpu/drm/i915/display/intel_color.c
> @@ -637,13 +637,15 @@ static void ilk_load_luts(const struct intel_crtc_state
> *crtc_state)  {
>  	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>  	const struct drm_property_blob *gamma_lut = crtc_state-
> >hw.gamma_lut;
> +	const struct drm_property_blob *degamma_lut = crtc_state-
> >hw.degamma_lut;
> +	const struct drm_property_blob *blob = gamma_lut ?: degamma_lut;
> 
>  	switch (crtc_state->gamma_mode) {
>  	case GAMMA_MODE_MODE_8BIT:
> -		ilk_load_lut_8(crtc, gamma_lut);
> +		ilk_load_lut_8(crtc, blob);
>  		break;
>  	case GAMMA_MODE_MODE_10BIT:
> -		ilk_load_lut_10(crtc, gamma_lut);
> +		ilk_load_lut_10(crtc, blob);
>  		break;
>  	default:
>  		MISSING_CASE(crtc_state->gamma_mode);
> --
> 2.26.2
> 
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