[linux-yocto] [PATCH 3/4] Revert "drm/i915: Hack to tie both common lanes together on chv"

[wei.tee.ng at intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

With recent hardware/firmware there don't appear to be any glitches
on the other PHY when we toggle the cmnreset for the other PHY. So
detangle the cmnlane power wells from one another and let them be
controlled independently.

This reverts commit 3dd7b97458e8aa2d8985b46622d226fa635071e7.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by:  Deepak S <deepak.s at linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
(cherry picked from commit 71849b67e788ca8899982df7adf21f61f44cb474)
Signed-off-by: cheah, vincent beng keat <vincent.beng.keat.cheah at intel.com>
---
 drivers/gpu/drm/i915/intel_runtime_pm.c |   14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 483eb0a..ec83c47 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -966,23 +966,13 @@ static struct i915_power_well chv_power_wells[] = {
 #endif
 	{
 		.name = "dpio-common-bc",
-		/*
-		 * XXX: cmnreset for one PHY seems to disturb the other.
-		 * As a workaround keep both powered on at the same
-		 * time for now.
-		 */
-		.domains = CHV_DPIO_CMN_BC_POWER_DOMAINS | CHV_DPIO_CMN_D_POWER_DOMAINS,
+		.domains = CHV_DPIO_CMN_BC_POWER_DOMAINS,
 		.data = PUNIT_POWER_WELL_DPIO_CMN_BC,
 		.ops = &chv_dpio_cmn_power_well_ops,
 	},
 	{
 		.name = "dpio-common-d",
-		/*
-		 * XXX: cmnreset for one PHY seems to disturb the other.
-		 * As a workaround keep both powered on at the same
-		 * time for now.
-		 */
-		.domains = CHV_DPIO_CMN_BC_POWER_DOMAINS | CHV_DPIO_CMN_D_POWER_DOMAINS,
+		.domains = CHV_DPIO_CMN_D_POWER_DOMAINS,
 		.data = PUNIT_POWER_WELL_DPIO_CMN_D,
 		.ops = &chv_dpio_cmn_power_well_ops,
 	},
-- 
1.7.9.5