[Intel-gfx] [PATCH 03/15] drm/i915: Set scaler mode for NV12

[Ville Syrjälä]

On Fri, Sep 04, 2015 at 07:32:59PM -0700, Chandra Konduru wrote:
> This patch sets appropriate scaler mode for NV12 format.
> In this mode, skylake scaler does either chroma-upsampling or
> chroma-upsampling and resolution scaling.
> 
> v2:
> - new reg defines squashed into patches used them (Ville)
> 
> Signed-off-by: Chandra Konduru <chandra.konduru at intel.com>

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

> ---
>  drivers/gpu/drm/i915/i915_reg.h     |    1 +
>  drivers/gpu/drm/i915/intel_atomic.c |    5 ++++-
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 1fa0554..825d721 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -5498,6 +5498,7 @@ enum skl_disp_power_wells {
>  #define PS_SCALER_MODE_MASK (3 << 28)
>  #define PS_SCALER_MODE_DYN  (0 << 28)
>  #define PS_SCALER_MODE_HQ  (1 << 28)
> +#define PS_SCALER_MODE_NV12 (2 << 28)
>  #define PS_PLANE_SEL_MASK  (7 << 25)
>  #define PS_PLANE_SEL(plane) ((plane + 1) << 25)
>  #define PS_FILTER_MASK         (3 << 23)
> diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
> index 9336e80..fd3972c 100644
> --- a/drivers/gpu/drm/i915/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/intel_atomic.c
> @@ -247,7 +247,10 @@ int intel_atomic_setup_scalers(struct drm_device *dev,
>  		}
>  
>  		/* set scaler mode */
> -		if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
> +		if (plane_state && plane_state->base.fb &&
> +			plane_state->base.fb->pixel_format == DRM_FORMAT_NV12) {
> +			scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_NV12;
> +		} else if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
>  			/*
>  			 * when only 1 scaler is in use on either pipe A or B,
>  			 * scaler 0 operates in high quality (HQ) mode.
> -- 
> 1.7.9.5
> 
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-- 
Ville Syrjälä
Intel OTC