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drm/i915: implement fastpath for overlay flip waiting

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As long as the gpu can keep up, neither the cpu (waiting for gpu)
nore the gpu (waiting for vblank to do an overlay flip) stalls.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Daniel Vetter
2009-09-15 22:57:36 +02:00
committed by Eric Anholt
parent 240a2d12df
commit 5a5a0c64a9
4 changed files with 41 additions and 11 deletions
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2
drivers/gpu/drm/i915/intel_drv.h
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@@ -126,7 +126,9 @@ struct intel_overlay {
u32 flip_addr;
struct drm_i915_gem_object *reg_bo;
void *virt_addr;
/* flip handling */
int hw_wedged;
uint32_t last_flip_req;
};
struct intel_crtc {