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[2/4] drm/i915/skl: Implement WaHdcCtxNonCoherent

Message ID 1420775953-1100-2-git-send-email-benjamin.widawsky@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ben Widawsky Jan. 9, 2015, 3:59 a.m. UTC 
Cc: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 62318a4..b8a445b 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -841,6 +841,17 @@  static int chv_init_workarounds(struct intel_engine_cs *ring)
 	return 0;
 }
 
+static int skl_init_workarounds(struct intel_engine_cs *ring)
+{
+	struct drm_device *dev = ring->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	/* WaHdcCtxNonCoherent:skl */
+	WA_SET_BIT_MASKED(HDC_CHICKEN0, HDC_FORCE_CTX_NON_COHERENT);
+
+	return 0;
+}
+
 int init_workarounds_ring(struct intel_engine_cs *ring)
 {
 	struct drm_device *dev = ring->dev;
@@ -856,6 +867,9 @@  int init_workarounds_ring(struct intel_engine_cs *ring)
 	if (IS_CHERRYVIEW(dev))
 		return chv_init_workarounds(ring);
 
+	if (IS_SKYLAKE(dev))
+		return skl_init_workarounds(ring);
+
 	return 0;
 }