[Intel-gfx] [PATCH v3 06/20] drm/i915: Fix adl+ degamma LUT size

[Shankar, Uma]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Ville Syrjala
> Sent: Monday, November 14, 2022 9:07 PM
> To: intel-gfx at lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v3 06/20] drm/i915: Fix adl+ degamma LUT size
> 
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> The degamma LUT is interpolated so we need the 128th (==1.0) entry to represent
> the full < 1.0 input range. Only the 129th and 130th entries are strictly for the >=1.0
> extended range inputs.

Looks Good to me.
Reviewed-by: Uma Shankar <uma.shankar at intel.com>

> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_pci.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index
> 211913be40ce..c50841e36c61 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -948,7 +948,7 @@ static const struct intel_device_info adl_s_info = {  #define
> XE_LPD_FEATURES \
>  	.display.abox_mask = GENMASK(1, 0),					\
>  	.display.color = {							\
> -		.degamma_lut_size = 128, .gamma_lut_size = 1024,		\
> +		.degamma_lut_size = 129, .gamma_lut_size = 1024,		\
>  		.degamma_lut_tests = DRM_COLOR_LUT_NON_DECREASING |
> 	\
>  				     DRM_COLOR_LUT_EQUAL_CHANNELS,
> 	\
>  	},									\
> --
> 2.37.4