Re: [PATCH v2 3/5] drm/i915: Split broadwell_load_luts() into smaller functions

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

On Thu, Jan 26, 2017 at 01:24:23PM +0200, Ander Conselvan de Oliveira wrote:
> Split the logic for progamming each LUT out of broadwell_load_luts(), so
> we can reuse part of it for geminilake.
> 
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/i915_reg.h    |  1 +
>  drivers/gpu/drm/i915/intel_color.c | 43 ++++++++++++++++++++++++++++----------
>  2 files changed, 33 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 9947354..06bbe55 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -8171,6 +8171,7 @@ enum {
>  #define   PAL_PREC_10_12_BIT		(0 << 31)
>  #define   PAL_PREC_SPLIT_MODE		(1 << 31)
>  #define   PAL_PREC_AUTO_INCREMENT	(1 << 15)
> +#define   PAL_PREC_INDEX_VALUE_MASK	(0x3ff << 0)
>  #define _PAL_PREC_DATA_A	0x4A404
>  #define _PAL_PREC_DATA_B	0x4AC04
>  #define _PAL_PREC_DATA_C	0x4B404
> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
> index 34952d0..82a3bc9 100644
> --- a/drivers/gpu/drm/i915/intel_color.c
> +++ b/drivers/gpu/drm/i915/intel_color.c
> @@ -340,20 +340,12 @@ static void haswell_load_luts(struct drm_crtc_state *crtc_state)
>  		hsw_enable_ips(intel_crtc);
>  }
>  
> -/* Loads the palette/gamma unit for the CRTC on Broadwell+. */
> -static void broadwell_load_luts(struct drm_crtc_state *state)
> +static void bdw_load_degamma_lut(struct drm_crtc_state *state)
>  {
> -	struct drm_crtc *crtc = state->crtc;
> -	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
> -	struct intel_crtc_state *intel_state = to_intel_crtc_state(state);
> -	enum pipe pipe = to_intel_crtc(crtc)->pipe;
> +	struct drm_i915_private *dev_priv = to_i915(state->crtc->dev);
> +	enum pipe pipe = to_intel_crtc(state->crtc)->pipe;
>  	uint32_t i, lut_size = INTEL_INFO(dev_priv)->color.degamma_lut_size;
>  
> -	if (crtc_state_is_legacy(state)) {
> -		haswell_load_luts(state);
> -		return;
> -	}
> -
>  	I915_WRITE(PREC_PAL_INDEX(pipe),
>  		   PAL_PREC_SPLIT_MODE | PAL_PREC_AUTO_INCREMENT);
>  
> @@ -377,6 +369,18 @@ static void broadwell_load_luts(struct drm_crtc_state *state)
>  				   (v << 20) | (v << 10) | v);
>  		}
>  	}
> +}
> +
> +static void bdw_load_gamma_lut(struct drm_crtc_state *state, u32 offset)
> +{
> +	struct drm_i915_private *dev_priv = to_i915(state->crtc->dev);
> +	enum pipe pipe = to_intel_crtc(state->crtc)->pipe;
> +	uint32_t i, lut_size = INTEL_INFO(dev_priv)->color.gamma_lut_size;
> +
> +	WARN_ON(offset & ~PAL_PREC_INDEX_VALUE_MASK);
> +
> +	I915_WRITE(PREC_PAL_INDEX(pipe),
> +		   PAL_PREC_SPLIT_MODE | PAL_PREC_AUTO_INCREMENT | offset);
>  
>  	if (state->gamma_lut) {
>  		struct drm_color_lut *lut =
> @@ -410,6 +414,23 @@ static void broadwell_load_luts(struct drm_crtc_state *state)
>  		I915_WRITE(PREC_PAL_GC_MAX(pipe, 1), (1 << 16) - 1);
>  		I915_WRITE(PREC_PAL_GC_MAX(pipe, 2), (1 << 16) - 1);
>  	}
> +}
> +
> +/* Loads the palette/gamma unit for the CRTC on Broadwell+. */
> +static void broadwell_load_luts(struct drm_crtc_state *state)
> +{
> +	struct drm_i915_private *dev_priv = to_i915(state->crtc->dev);
> +	struct intel_crtc_state *intel_state = to_intel_crtc_state(state);
> +	enum pipe pipe = to_intel_crtc(state->crtc)->pipe;
> +
> +	if (crtc_state_is_legacy(state)) {
> +		haswell_load_luts(state);
> +		return;
> +	}
> +
> +	bdw_load_degamma_lut(state);
> +	bdw_load_gamma_lut(state,
> +			   INTEL_INFO(dev_priv)->color.degamma_lut_size);
>  
>  	intel_state->gamma_mode = GAMMA_MODE_MODE_SPLIT;
>  	I915_WRITE(GAMMA_MODE(pipe), GAMMA_MODE_MODE_SPLIT);
> -- 
> 2.5.5

-- 
Ville Syrjälä
Intel OTC
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