From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Date: Mon, 23 Nov 2015 22:19:32 +0000 (-0800)
Subject: drm/i915: Also disable PSR on Sink when disabling it on Source.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b6e4d53490504ee43a765e71a8fd8337af137623;p=linux-beck.git

drm/i915: Also disable PSR on Sink when disabling it on Source.

It is not a bad idea to disable the PSR feature on Sink
when we are disabling on the Source.

v2: Move dpcd write inside mutex protected area as suggested by Sonika.

Cc: Sonika Jindal <sonika.jindal@intel.com>
Suggested-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index a02dd3015b91..b6609e648f75 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -524,11 +524,15 @@ void intel_psr_disable(struct intel_dp *intel_dp)
 		return;
 	}
 
+	/* Disable PSR on Source */
 	if (HAS_DDI(dev))
 		hsw_psr_disable(intel_dp);
 	else
 		vlv_psr_disable(intel_dp);
 
+	/* Disable PSR on Sink */
+	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, 0);
+
 	dev_priv->psr.enabled = NULL;
 	mutex_unlock(&dev_priv->psr.lock);