[Intel-gfx] [PATCH] drm/i915: restrict PP save/restore to platforms with lvds

[Daniel Vetter]

eDP already restores PP state completely on it's own, we only need
this code for LVDS. Since it's more work to move this into the lvds
encoder properly just limit it to affected pch chips for now
(ibx&cpt/ppt).

Cc: Jani Nikula <jani.nikula at intel.com>
Acked-by: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/i915/i915_suspend.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index a2aa09ce3202..7f6b050266a7 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -43,8 +43,8 @@ static void i915_save_display(struct drm_device *dev)
 	else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
 		dev_priv->regfile.saveLVDS = I915_READ(LVDS);
 
-	/* Panel power sequencer */
-	if (HAS_PCH_SPLIT(dev)) {
+	/* Panel power sequencer, only needed for LVDS */
+	if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) {
 		dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
 		dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
 		dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
@@ -78,8 +78,8 @@ static void i915_restore_display(struct drm_device *dev)
 	else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
 		I915_WRITE(LVDS, dev_priv->regfile.saveLVDS & mask);
 
-	/* Panel power sequencer */
-	if (HAS_PCH_SPLIT(dev)) {
+	/* Panel power sequencer, only needed for LVDS */
+	if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) {
 		I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS);
 		I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS);
 		I915_WRITE(PCH_PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR);
-- 
2.7.0.rc3