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drm/i915: Enable MI_FLUSH on Sandybridge 

MI_FLUSH is being deprecated, but still available on Sandybridge.
Make sure it's enabled as userspace still uses MI_FLUSH.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Zhenyu Wang 2010-08-30 16:12:42 +08:00 committed by Chris Wilson
parent f8f235e5bb
commit a69ffdbfcb
2 changed files with 7 additions and 2 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -319,6 +319,7 @@
#define MI_MODE 0x0209c
# define VS_TIMER_DISPATCH (1 << 6)
# define MI_FLUSH_ENABLE (1 << 11)
#define SCPD0 0x0209c /* 915+ only */
#define IER 0x020a0

8
drivers/gpu/drm/i915/intel_ringbuffer.c
View File

@ -220,9 +220,13 @@ static int init_render_ring(struct drm_device *dev,
{
drm_i915_private_t *dev_priv = dev->dev_private;
int ret = init_ring_common(dev, ring);
int mode;
if (IS_I9XX(dev) && !IS_GEN3(dev)) {
I915_WRITE(MI_MODE,
(VS_TIMER_DISPATCH) << 16 | VS_TIMER_DISPATCH);
mode = VS_TIMER_DISPATCH << 16 | VS_TIMER_DISPATCH;
if (IS_GEN6(dev))
mode |= MI_FLUSH_ENABLE << 16 | MI_FLUSH_ENABLE;
I915_WRITE(MI_MODE, mode);
}
return ret;
}