[Intel-gfx] [PATCH v4 4/5] drm/i915/psr: Avoid PSR exit max time timeout

[Rodrigo Vivi]

On Thu, Jun 14, 2018 at 01:34:32PM -0700, José Roberto de Souza wrote:
> Specification requires that max time should be masked from bdw and
> forward but it can be also safely enabled to hsw.
> This will make PSR exits more deterministic and only when really
> needed. If this was used to fix a issue in some panel than can
> only self-refresh for a few seconds, that panel will interrupt
> and assert one of the PSR errors handled in:
> 'drm/i915/psr: Handle PSR RFB storage error' and
> 'drm/i915/psr: Begin to handle PSR/PSR2 errors set by sink'
> 
> Also fixing style here.

I don't believe that is a style error. So I believe only
the MAX_SLEEP one should be added following same style.

> 
> Spec: 21664
> 
> v4:
> patch moved to before 'drm/i915/psr/bdw+: Enable CRC check in the
> static frame on the sink side' to avoid touch in 2 patches
> EDP_PSR_DEBUG.

I thought this change here depended on having CRC check enabled
so it should come first and only bdw+...
Isn't this the case?

> 
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_psr.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
> index fd240e45f341..177cd57b1029 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -629,10 +629,11 @@ static void hsw_psr_enable_source(struct intel_dp *intel_dp,
>  		 * on frontbuffer tracking.
>  		 */
>  		I915_WRITE(EDP_PSR_DEBUG,
> -			   EDP_PSR_DEBUG_MASK_MEMUP |
> -			   EDP_PSR_DEBUG_MASK_HPD |
> -			   EDP_PSR_DEBUG_MASK_LPSP |
> -			   EDP_PSR_DEBUG_MASK_DISP_REG_WRITE);
> +			  EDP_PSR_DEBUG_MASK_MEMUP |
> +			  EDP_PSR_DEBUG_MASK_HPD |
> +			  EDP_PSR_DEBUG_MASK_LPSP |
> +			  EDP_PSR_DEBUG_MASK_DISP_REG_WRITE |
> +			  EDP_PSR_DEBUG_MASK_MAX_SLEEP);
>  	}
>  }
>  
> -- 
> 2.17.1
>