Re: [Intel-gfx] [PATCH 05/11] drm/i915: Split ivb_load_lut_ext_max() into two parts

["Nautiyal, Ankit K" <ankit.k.nautiyal@intel.com>]

Small typos in commit message (inline below)

Otherwise the change looks good to me

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>


On 10/26/2022 5:09 PM, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> Split the EXT2_MAX register progrmaming into its own funciton.

nitpick : 'programming' , 'function' typos.

Regards,

Ankit


> More in line with the whole "cobble together stuff from small
> pieces" approach used in this code.
>
> The EXT(2)_MAX registers are also not really part of the
> multi-segment section of the LUT, so hoise the calls to a
> higher level, just like we do in other gamma modes as well.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>   drivers/gpu/drm/i915/display/intel_color.c | 29 +++++++++++-----------
>   1 file changed, 14 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
> index e73e6ea6f82f..3b78b882e0c0 100644
> --- a/drivers/gpu/drm/i915/display/intel_color.c
> +++ b/drivers/gpu/drm/i915/display/intel_color.c
> @@ -764,27 +764,23 @@ static void bdw_load_lut_10(struct intel_crtc *crtc,
>   static void ivb_load_lut_ext_max(const struct intel_crtc_state *crtc_state)
>   {
>   	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> -	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
>   	enum pipe pipe = crtc->pipe;
>   
>   	/* Program the max register to clamp values > 1.0. */
>   	intel_dsb_reg_write(crtc_state, PREC_PAL_EXT_GC_MAX(pipe, 0), 1 << 16);
>   	intel_dsb_reg_write(crtc_state, PREC_PAL_EXT_GC_MAX(pipe, 1), 1 << 16);
>   	intel_dsb_reg_write(crtc_state, PREC_PAL_EXT_GC_MAX(pipe, 2), 1 << 16);
> +}
>   
> -	/*
> -	 * Program the gc max 2 register to clamp values > 1.0.
> -	 * ToDo: Extend the ABI to be able to program values
> -	 * from 3.0 to 7.0
> -	 */
> -	if (DISPLAY_VER(i915) >= 10) {
> -		intel_dsb_reg_write(crtc_state, PREC_PAL_EXT2_GC_MAX(pipe, 0),
> -				    1 << 16);
> -		intel_dsb_reg_write(crtc_state, PREC_PAL_EXT2_GC_MAX(pipe, 1),
> -				    1 << 16);
> -		intel_dsb_reg_write(crtc_state, PREC_PAL_EXT2_GC_MAX(pipe, 2),
> -				    1 << 16);
> -	}
> +static void glk_load_lut_ext2_max(const struct intel_crtc_state *crtc_state)
> +{
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +	enum pipe pipe = crtc->pipe;
> +
> +	/* Program the max register to clamp values > 1.0. */	
> +	intel_dsb_reg_write(crtc_state, PREC_PAL_EXT2_GC_MAX(pipe, 0), 1 << 16);
> +	intel_dsb_reg_write(crtc_state, PREC_PAL_EXT2_GC_MAX(pipe, 1), 1 << 16);
> +	intel_dsb_reg_write(crtc_state, PREC_PAL_EXT2_GC_MAX(pipe, 2), 1 << 16);
>   }
>   
>   static void ivb_load_luts(const struct intel_crtc_state *crtc_state)
> @@ -913,6 +909,7 @@ static void glk_load_luts(const struct intel_crtc_state *crtc_state)
>   	case GAMMA_MODE_MODE_10BIT:
>   		bdw_load_lut_10(crtc, post_csc_lut, PAL_PREC_INDEX_VALUE(0));
>   		ivb_load_lut_ext_max(crtc_state);
> +		glk_load_lut_ext2_max(crtc_state);
>   		break;
>   	default:
>   		MISSING_CASE(crtc_state->gamma_mode);
> @@ -1029,7 +1026,6 @@ icl_program_gamma_multi_segment(const struct intel_crtc_state *crtc_state)
>   	/* The last entry in the LUT is to be programmed in GCMAX */
>   	entry = &lut[256 * 8 * 128];
>   	ivb_load_lut_max(crtc_state, entry);
> -	ivb_load_lut_ext_max(crtc_state);
>   }
>   
>   static void icl_load_luts(const struct intel_crtc_state *crtc_state)
> @@ -1048,10 +1044,13 @@ static void icl_load_luts(const struct intel_crtc_state *crtc_state)
>   	case GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED:
>   		icl_program_gamma_superfine_segment(crtc_state);
>   		icl_program_gamma_multi_segment(crtc_state);
> +		ivb_load_lut_ext_max(crtc_state);
> +		glk_load_lut_ext2_max(crtc_state);
>   		break;
>   	case GAMMA_MODE_MODE_10BIT:
>   		bdw_load_lut_10(crtc, post_csc_lut, PAL_PREC_INDEX_VALUE(0));
>   		ivb_load_lut_ext_max(crtc_state);
> +		glk_load_lut_ext2_max(crtc_state);
>   		break;
>   	default:
>   		MISSING_CASE(crtc_state->gamma_mode);