[Intel-gfx] [PATCH 8/8] drm/i915: Hook PSR functionality

[Paulo Zanoni]

Hi

2013/2/25 Rodrigo Vivi <rodrigo.vivi at gmail.com>:
> PSR must be enabled after transcoder and port are running.
> And it is only available for HSW.
>
> v2: move enable/disable to intel_ddi
>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index 816c45c..bbfdcfd 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1321,6 +1321,7 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)
>                 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
>
>                 ironlake_edp_backlight_on(intel_dp);
> +               intel_edp_enable_psr(intel_dp);
>         }
>
>         if (intel_crtc->eld_vld) {
> @@ -1345,6 +1346,7 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder)
>                 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
>
>                 ironlake_edp_backlight_off(intel_dp);
> +               intel_edp_disable_psr(intel_dp);

The spec suggests PSR should be disabled even before backlight (it
also suggests audio should be disabled before backlight, and I notice
this seems to be wrong in our code).

>         }
>
>         tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
> --
> 1.8.1.2
>
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-- 
Paulo Zanoni