[Intel-gfx] [PATCH] drm/i915: Also disable PSR on Sink when disabling it on Source.

[Jindal, Sonika]

Reviewed-by: Sonika Jindal <sonika.jindal at intel.com>

-----Original Message-----
From: Vivi, Rodrigo 
Sent: Tuesday, November 24, 2015 3:50 AM
To: intel-gfx at lists.freedesktop.org
Cc: Vivi, Rodrigo; Jindal, Sonika
Subject: [PATCH] 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 at intel.com>
Suggested-by: Sonika Jindal <sonika.jindal at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/intel_psr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 2b2f84d..3bbb270 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -518,11 +518,15 @@ 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);
 
--
2.4.3