diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2013-01-20 16:11:20 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-02-06 04:33:45 +0000 |
| commit | a2d2dcd9e1aa9585e2ffb757ce7f3fc80bcad9f1 (patch) | |
| tree | a88464358b548cf9b4bfffae2c957355d651b570 /drivers/gpu/drm | |
| parent | d31349bd14461e299df2443dfec5bf7725154393 (diff) | |
drm/i915: Disable AsyncFlip performance optimisations
commit 1c8c38c588ea91f8deeae21284840459d1bb58e3 upstream.
This is a required workarounds for all products, especially on gen6+
where it causes the command streamer to fail to parse instructions
following a WAIT_FOR_EVENT. We use WAIT_FOR_EVENT for synchronising
between the GPU and the display engines, and so this bit being unset may
cause hangs.
References: https://bugzilla.kernel.org/show_bug.cgi?id=52311
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2:
- Adjust context
- s/_MASKED_BIT/GFX_MODE/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 16 |
2 files changed, 13 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 56d931ae28a..a6325138e3a 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -400,6 +400,7 @@ #define MI_MODE 0x0209c # define VS_TIMER_DISPATCH (1 << 6) # define MI_FLUSH_ENABLE (1 << 12) +# define ASYNC_FLIP_PERF_DISABLE (1 << 14) #define GEN6_GT_MODE 0x20d0 #define GEN6_GT_MODE_HI (1 << 9) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 93819f8661e..38a77938d59 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -399,12 +399,20 @@ static int init_render_ring(struct intel_ring_buffer *ring) if (INTEL_INFO(dev)->gen > 3) { int mode = VS_TIMER_DISPATCH << 16 | VS_TIMER_DISPATCH; I915_WRITE(MI_MODE, mode); - if (IS_GEN7(dev)) - I915_WRITE(GFX_MODE_GEN7, - GFX_MODE_DISABLE(GFX_TLB_INVALIDATE_ALWAYS) | - GFX_MODE_ENABLE(GFX_REPLAY_MODE)); } + /* We need to disable the AsyncFlip performance optimisations in order + * to use MI_WAIT_FOR_EVENT within the CS. It should already be + * programmed to '1' on all products. + */ + if (INTEL_INFO(dev)->gen >= 6) + I915_WRITE(MI_MODE, GFX_MODE_ENABLE(ASYNC_FLIP_PERF_DISABLE)); + + if (IS_GEN7(dev)) + I915_WRITE(GFX_MODE_GEN7, + GFX_MODE_DISABLE(GFX_TLB_INVALIDATE_ALWAYS) | + GFX_MODE_ENABLE(GFX_REPLAY_MODE)); + if (INTEL_INFO(dev)->gen >= 5) { ret = init_pipe_control(ring); if (ret) |