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

[Daniel Vetter]

On Fri, Jan 11, 2013 at 05:57:57PM -0200, Rodrigo Vivi wrote:
> PSR must be enabled after transcoder and port are running.
> And it is only available for HSW.
> 
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 15 +++++++++++++--
>  1 file changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 1464e47..7e1469a 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3431,8 +3431,13 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
>  
>  	intel_crtc_update_cursor(crtc, true);
>  
> -	for_each_encoder_on_crtc(dev, crtc, encoder)
> +	for_each_encoder_on_crtc(dev, crtc, encoder) {
>  		encoder->enable(encoder);
> +		if (encoder->type == INTEL_OUTPUT_EDP) {
> +			struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
> +			intel_edp_enable_psr(intel_dp);
> +		}

This belongs into the dp encoder ->enable/disable callback. Really, I
_hate_ such encoder/output special-casing in our crtc code ;-) So we
should try to move away from such leaky abstraction, not add more ...
-Daniel

> +	}
>  
>  	/*
>  	 * There seems to be a race in PCH platform hw (at least on some
> @@ -3459,8 +3464,14 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
>  	if (!intel_crtc->active)
>  		return;
>  
> -	for_each_encoder_on_crtc(dev, crtc, encoder)
> +	for_each_encoder_on_crtc(dev, crtc, encoder) {
> +		if (encoder->type == INTEL_OUTPUT_EDP) {
> +			struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
> +			intel_edp_disable_psr(intel_dp);
> +		}
>  		encoder->disable(encoder);
> +	}
> +
>  
>  	intel_crtc_wait_for_pending_flips(crtc);
>  	drm_vblank_off(dev, pipe);
> -- 
> 1.7.11.7
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch