Re: [PATCH 01/15] drm/i915: only disable DDI sound if intel_crtc->eld_vld

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

On Wed, Mar 06, 2013 at 08:03:08PM -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.
> 
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c |    9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index 56bb7cb..cd2f519 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1347,9 +1347,12 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder)
>  		ironlake_edp_backlight_off(intel_dp);
>  	}
>  
> -	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);
> +	}

We set eld_vld=false before disabling the crtc in intel_crtc_disable().
I think you need to rearrange that so that we clear eld_vld only
after ->crtc_disable has been called.

>  }
>  
>  int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)
> -- 
> 1.7.10.4
> 
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-- 
Ville Syrjälä
Intel OTC