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drm/i915: HSW CRW stability magic

Message ID 1349904928-8234-1-git-send-email-rodrigo.vivi@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Rodrigo Vivi Oct. 10, 2012, 9:35 p.m. UTC 
This magic brings stability to HSW B0 CRW machines.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Daniel Vetter Oct. 11, 2012, 8:36 p.m. UTC | #1 
On Wed, Oct 10, 2012 at 06:35:28PM -0300, Rodrigo Vivi wrote:
> This magic brings stability to HSW B0 CRW machines.
> 
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Picked up for -fixes, thanks for the patch.
-Daniel
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 61c3640..e59713c 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3953,6 +3953,9 @@  i915_gem_init_hw(struct drm_device *dev)
 	if (!intel_enable_gtt())
 		return -EIO;
 
+	if (IS_HASWELL(dev) && (I915_READ(0x120010) == 1))
+		I915_WRITE(0x9008, I915_READ(0x9008) | 0xf0000);
+
 	i915_gem_l3_remap(dev);
 
 	i915_gem_init_swizzling(dev);