[Intel-gfx] [PATCH] Revert "drm/i915: Ignore panel type from OpRegion on SKL"

[ville.syrjala at linux.intel.com]

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

This reverts commit bb10d4ec3be4b069bfb61c60ca4f708f58f440f1.

Since commit c8ebfad7a063 ("drm/i915: Ignore OpRegion panel type except
on select machines") we ignore the OpRegion panel type except for
specific machines (handled via a DMI match), so having SKL explicitly
excluded from using the OpRegion panel type is redundant. So let's
remove the SKL check.

Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: James Bottomley <James.Bottomley at HansenPartnership.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_opregion.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index 4a862a358c70..2e870da8927a 100644
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -1061,16 +1061,5 @@ intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
 		return -ENODEV;
 	}
 
-	/*
-	 * FIXME On Dell XPS 13 9350 the OpRegion panel type (0) gives us
-	 * low vswing for eDP, whereas the VBT panel type (2) gives us normal
-	 * vswing instead. Low vswing results in some display flickers, so
-	 * let's simply ignore the OpRegion panel type on SKL for now.
-	 */
-	if (IS_SKYLAKE(dev_priv)) {
-		DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
-		return -ENODEV;
-	}
-
 	return ret - 1;
 }
-- 
2.10.2