Re: [PATCH v2 3/9] drm/i915: Split i9xx_read_lut_8() to gmch vs. ilk variants

["Sharma, Swati2" <swati2.sharma@xxxxxxxxx>]

On 03-Mar-20 11:03 PM, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> To mirror the load_luts path let's clone an ilk+ version
> from i9xx_read_lut_8(). I guess the extra branch isn't a huge
> issue but feels better to make a clean split.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

Reviewed-by: Swati Sharma <swati2.sharma@xxxxxxxxx>

> ---
>   drivers/gpu/drm/i915/display/intel_color.c | 41 ++++++++++++++++++----
>   1 file changed, 35 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
> index cf8ed4e2ae13..e3abaa1908a9 100644
> --- a/drivers/gpu/drm/i915/display/intel_color.c
> +++ b/drivers/gpu/drm/i915/display/intel_color.c
> @@ -1706,10 +1706,7 @@ i9xx_read_lut_8(const struct intel_crtc_state *crtc_state)
>   	blob_data = blob->data;
>   
>   	for (i = 0; i < LEGACY_LUT_LENGTH; i++) {
> -		if (HAS_GMCH(dev_priv))
> -			val = intel_de_read(dev_priv, PALETTE(pipe, i));
> -		else
> -			val = intel_de_read(dev_priv, LGC_PALETTE(pipe, i));
> +		val = intel_de_read(dev_priv, PALETTE(pipe, i));
>   
>   		blob_data[i].red = intel_color_lut_pack(REG_FIELD_GET(
>   							LGC_PALETTE_RED_MASK, val), 8);
> @@ -1824,6 +1821,38 @@ static void chv_read_luts(struct intel_crtc_state *crtc_state)
>   		i965_read_luts(crtc_state);
>   }
>   
> +static struct drm_property_blob *
> +ilk_read_lut_8(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);
> +	enum pipe pipe = crtc->pipe;
> +	struct drm_property_blob *blob;
> +	struct drm_color_lut *blob_data;
> +	u32 i, val;
> +
> +	blob = drm_property_create_blob(&dev_priv->drm,
> +					sizeof(struct drm_color_lut) * LEGACY_LUT_LENGTH,
> +					NULL);
> +	if (IS_ERR(blob))
> +		return NULL;
> +
> +	blob_data = blob->data;
> +
> +	for (i = 0; i < LEGACY_LUT_LENGTH; i++) {
> +		val = intel_de_read(dev_priv, LGC_PALETTE(pipe, i));
> +
> +		blob_data[i].red = intel_color_lut_pack(REG_FIELD_GET(
> +							LGC_PALETTE_RED_MASK, val), 8);
> +		blob_data[i].green = intel_color_lut_pack(REG_FIELD_GET(
> +							  LGC_PALETTE_GREEN_MASK, val), 8);
> +		blob_data[i].blue = intel_color_lut_pack(REG_FIELD_GET(
> +							 LGC_PALETTE_BLUE_MASK, val), 8);
> +	}
> +
> +	return blob;
> +}
> +
>   static struct drm_property_blob *
>   ilk_read_lut_10(const struct intel_crtc_state *crtc_state)
>   {
> @@ -1866,7 +1895,7 @@ static void ilk_read_luts(struct intel_crtc_state *crtc_state)
>   		return;
>   
>   	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
> -		crtc_state->hw.gamma_lut = i9xx_read_lut_8(crtc_state);
> +		crtc_state->hw.gamma_lut = ilk_read_lut_8(crtc_state);
>   	else
>   		crtc_state->hw.gamma_lut = ilk_read_lut_10(crtc_state);
>   }
> @@ -1915,7 +1944,7 @@ static void glk_read_luts(struct intel_crtc_state *crtc_state)
>   		return;
>   
>   	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
> -		crtc_state->hw.gamma_lut = i9xx_read_lut_8(crtc_state);
> +		crtc_state->hw.gamma_lut = ilk_read_lut_8(crtc_state);
>   	else
>   		crtc_state->hw.gamma_lut = glk_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(0));
>   }

--
~Swati Sharma
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