Re: [PATCH 2/7] drm/i915: only disable DDI sound if intel_crtc->eld_vld

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

On Fri, Mar 22, 2013 at 02:11:43PM -0300, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni@intel.com>
> 
> We already have the same check on intel_enable_ddi. This patch
> prevents "unclaimed register" messages when the power well is
> disabled.
> 
> V2: Reset intel_crtc->eld_vld to false after the mode_set function.
> 
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

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

> ---
>  drivers/gpu/drm/i915/intel_ddi.c     |    9 ++++++---
>  drivers/gpu/drm/i915/intel_display.c |    2 +-
>  2 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index bfcc58f..cb0d0f7 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1341,9 +1341,12 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder)
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	uint32_t tmp;
>  
> -	tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
> -	tmp &= ~((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
> -	I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
> +	if (intel_crtc->eld_vld) {
> +		tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
> +		tmp &= ~((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) <<
> +			 (pipe * 4));
> +		I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
> +	}
>  
>  	if (type == INTEL_OUTPUT_EDP) {
>  		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index ec26a85..188e31f 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3822,8 +3822,8 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
>  	/* crtc should still be enabled when we disable it. */
>  	WARN_ON(!crtc->enabled);
>  
> -	intel_crtc->eld_vld = false;
>  	dev_priv->display.crtc_disable(crtc);
> +	intel_crtc->eld_vld = false;
>  	intel_crtc_update_sarea(crtc, false);
>  	dev_priv->display.off(crtc);
>  
> -- 
> 1.7.10.4
> 
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-- 
Ville Syrjälä
Intel OTC