Re: [PATCH 2/2] drm/i915: Enable PM Interrupts target via Display Interface.

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

On Mon, Apr 14, 2014 at 10:41:15PM +0530, deepak.s@intel.com wrote:
> From: Deepak S <deepak.s@intel.com>
> 
> In BDW, Apart from unmasking up/down threshold interrupts. we need
> to umask bit 32 of PM_INTRMASK to route interrupts to target via Display
> Interface.
> 
> Signed-off-by: Deepak S <deepak.s@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h | 1 +
>  drivers/gpu/drm/i915/intel_pm.c | 2 ++
>  2 files changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index c2dd436..8c7841b 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -5105,6 +5105,7 @@ enum punit_power_well {
>  #define GEN6_RC6p_THRESHOLD			0xA0BC
>  #define GEN6_RC6pp_THRESHOLD			0xA0C0
>  #define GEN6_PMINTRMSK				0xA168
> +#define GEN8_PMINTR_REDIRECT_TO_NON_DISP	0x7FFFFFFF

Defining is as (1<<31) would make more sense to me.

>  
>  #define GEN6_PMISR				0x44020
>  #define GEN6_PMIMR				0x44024 /* rps_lock */
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 27b64ab..6b123cd 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3066,6 +3066,8 @@ static u32 gen6_rps_pm_mask(struct drm_i915_private *dev_priv, u8 val)
>  	if (INTEL_INFO(dev_priv->dev)->gen <= 7 && !IS_HASWELL(dev_priv->dev))
>  		mask |= GEN6_PM_RP_UP_EI_EXPIRED;
>  
> +	mask &= GEN8_PMINTR_REDIRECT_TO_NON_DISP;
> +
>  	return ~mask;
>  }
>  
> -- 
> 1.8.5.2
> 
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-- 
Ville Syrjälä
Intel OTC