[Intel-gfx] [PATCH 1/2] drm/i915/vlv: don't save panel power sequencer registers on suspend

[Ville Syrjälä]

On Tue, Nov 11, 2014 at 04:48:03PM +0200, Jani Nikula wrote:
> Don't save the panel power sequencer register on vlv/chv for two simple
> reasons. First, these are the wrong registers to save to begin
> with. Second, they are not restored anyway.

Indeed. I also like how the display save/restore functions look nothing
alike. Scary piece of code this, hopefully someone will kill it all at
some point...

But anyways, patch is good, so:
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> 
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_suspend.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
> index 043123c77a1f..bd8adf2ca7d8 100644
> --- a/drivers/gpu/drm/i915/i915_suspend.c
> +++ b/drivers/gpu/drm/i915/i915_suspend.c
> @@ -208,7 +208,6 @@ static void i915_save_display(struct drm_device *dev)
>  		if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
>  			dev_priv->regfile.saveLVDS = I915_READ(PCH_LVDS);
>  	} else if (IS_VALLEYVIEW(dev)) {
> -		dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL);
>  		dev_priv->regfile.savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
>  
>  		dev_priv->regfile.saveBLC_HIST_CTL =
> @@ -230,7 +229,7 @@ static void i915_save_display(struct drm_device *dev)
>  		dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
>  		dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
>  		dev_priv->regfile.savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
> -	} else {
> +	} else if (!IS_VALLEYVIEW(dev)) {
>  		dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
>  		dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
>  		dev_priv->regfile.savePP_DIVISOR = I915_READ(PP_DIVISOR);
> -- 
> 2.1.1
> 
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-- 
Ville Syrjälä
Intel OTC