Re: [v7][PATCH 11/12] drm/i915: Extract ilk_read_luts()

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Wed, May 29, 2019 at 03:21:01PM +0530, Swati Sharma wrote:
> In this patch, hw gamma blob is created for ILK.
> 
> v4: -No need to initialize *blob [Jani]
>     -Removed right shifts [Jani]
>     -Dropped dev local var [Jani]
> v5: -Returned blob instead of assigning it internally within the
>      function [Ville]
>     -Renamed ilk_get_color_config() to ilk_read_luts() [Ville]
> 
> Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h    |  3 +++
>  drivers/gpu/drm/i915/intel_color.c | 42 ++++++++++++++++++++++++++++++++++++--
>  2 files changed, 43 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 249296b..d5ff323 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7189,6 +7189,9 @@ enum {
>  /* ilk/snb precision palette */
>  #define _PREC_PALETTE_A           0x4b000
>  #define _PREC_PALETTE_B           0x4c000
> +#define   PREC_PALETTE_RED_MASK   REG_GENMASK(29, 20)
> +#define   PREC_PALETTE_GREEN_MASK REG_GENMASK(19, 10)
> +#define   PREC_PALETTE_BLUE_MASK  REG_GENMASK(9, 0)
>  #define PREC_PALETTE(pipe, i) _MMIO(_PIPE(pipe, _PREC_PALETTE_A, _PREC_PALETTE_B) + (i) * 4)
>  
>  #define  _PREC_PIPEAGCMAX              0x4d000
> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
> index 6e6e54b..7568b13 100644
> --- a/drivers/gpu/drm/i915/intel_color.c
> +++ b/drivers/gpu/drm/i915/intel_color.c
> @@ -1650,6 +1650,43 @@ static void ivb_read_luts(struct intel_crtc_state *crtc_state)
>  		crtc_state->base.gamma_lut = ivb_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(0));
>  }
>  
> +static struct drm_property_blob *
> +ilk_read_gamma_lut(struct intel_crtc_state *crtc_state)

ilk_read_lut_10()

> +{
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> +	u32 i, val, lut_size = INTEL_INFO(dev_priv)->color.gamma_lut_size;
> +	enum pipe pipe = crtc->pipe;
> +	struct drm_property_blob *blob;
> +	struct drm_color_lut *blob_data;
> +
> +	blob = drm_property_create_blob(&dev_priv->drm,
> +					sizeof(struct drm_color_lut) * lut_size,
> +					NULL);
> +	if (IS_ERR(blob))
> +		return NULL;
> +
> +	blob_data = blob->data;
> +
> +	for (i = 0; i < lut_size - 1; i++) {
> +		val = I915_READ(PREC_PALETTE(pipe, i));
> +
> +		blob_data[i].red = intel_color_lut_pack(REG_FIELD_GET(PREC_PALETTE_RED_MASK, val), 10);
> +		blob_data[i].green = intel_color_lut_pack(REG_FIELD_GET(PREC_PALETTE_GREEN_MASK, val), 10);
> +		blob_data[i].blue = intel_color_lut_pack(REG_FIELD_GET(PREC_PALETTE_BLUE_MASK, val), 10);
> +	}
> +
> +	return blob;
> +}
> +
> +static void ilk_read_luts(struct intel_crtc_state *crtc_state)
> +{
> +	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
> +		crtc_state->base.gamma_lut = i9xx_read_lut_8(crtc_state);
> +	else
> +		crtc_state->base.gamma_lut = ilk_read_gamma_lut(crtc_state);
> +}
> +
>  void intel_color_init(struct intel_crtc *crtc)
>  {
>  	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> @@ -1703,9 +1740,10 @@ void intel_color_init(struct intel_crtc *crtc)
>  		} else if (INTEL_GEN(dev_priv) >= 7) {
>  			dev_priv->display.load_luts = ivb_load_luts;
>  			dev_priv->display.read_luts = ivb_read_luts;
> -		}
> -		else
> +		} else {
>  			dev_priv->display.load_luts = ilk_load_luts;
> +			dev_priv->display.read_luts = ilk_read_luts;
> +		}
>  	}
>  
>  	drm_crtc_enable_color_mgmt(&crtc->base,
> -- 
> 1.9.1
> 
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-- 
Ville Syrjälä
Intel
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