From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Wed, 3 Sep 2014 11:09:50 +0000 (+0300)
Subject: drm/i915: Don't call gen8_fbc_sw_flush() on chv
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c317adcd58cdc05badd73db901c677164050ab6c;p=linux-beck.git

drm/i915: Don't call gen8_fbc_sw_flush() on chv

CHV doesn't have FBC, so don't go calling gen8_fbc_sw_flush() on it.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Add a FIXME comment while at it that we should rework this a
lot more.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d49d639bd383..b8a00ed67e09 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9098,7 +9098,12 @@ void intel_frontbuffer_flush(struct drm_device *dev,
 
 	intel_edp_psr_flush(dev, frontbuffer_bits);
 
-	if (IS_GEN8(dev))
+	/*
+	 * FIXME: Unconditional fbc flushing here is a rather gross hack and
+	 * needs to be reworked into a proper frontbuffer tracking scheme like
+	 * psr employs.
+	 */
+	if (IS_BROADWELL(dev))
 		gen8_fbc_sw_flush(dev, FBC_REND_CACHE_CLEAN);
 }