[PATCH 4/6] drm/i915/psr: Skip aux handeshake if the vbt tells us to

[ville.syrjala at linux.intel.com]

From: Daniel Vetter <daniel.vetter at ffwll.ch>

Not sure we can trust VBT on this one, but let's try.

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Sonika Jindal <sonika.jindal at intel.com>
Cc: Durgadoss R <durgadoss.r at intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_psr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index aacd8d1767f2..c073cbbf1b91 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -298,6 +298,9 @@ static void hsw_psr_enable_source(struct intel_dp *intel_dp)
 	else
 		val |= EDP_PSR_TP1_TP2_SEL;
 
+	if (!dev_priv->vbt.psr.require_aux_wakeup)
+		val |= EDP_PSR_SKIP_AUX_EXIT;
+
 	I915_WRITE(EDP_PSR_CTL, val);
 
 	if (!dev_priv->psr.psr2_support)
-- 
2.7.4