[Intel-gfx] [PATCH] drm/i915: PSR: Keep sink state consistent with source

[Durgadoss R]

BSpec recommends to keep the main link state consistent
between the source and the sink. As per that, update
the main link state in sink DPCD register to 'active',
for Valleyview based platforms.

Signed-off-by: Durgadoss R <durgadoss.r at intel.com>
---
 drivers/gpu/drm/i915/intel_psr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index b9f40c2..94e14f2 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -133,7 +133,7 @@ static void hsw_psr_setup_vsc(struct intel_dp *intel_dp)
 static void vlv_psr_enable_sink(struct intel_dp *intel_dp)
 {
 	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG,
-			   DP_PSR_ENABLE);
+			   DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE);
 }
 
 static void hsw_psr_enable_sink(struct intel_dp *intel_dp)
-- 
1.9.1