If we hit a vblank and see that have a pageflip queue but not yet processed, ensure that the GPU is running at maximum in order to clear the backlog. Pageflips are only queued for the following vblank, if we miss it, there will be a visible stutter. Boosting the GPU frequency doesn't prevent us from missing the target vblank, but it should help the subsequent frames hitting theirs.
Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/intel_display.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index e15b3ab..215526f 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8960,6 +8960,7 @@ void intel_check_page_flip(struct drm_device *dev, int pipe) struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); unsigned long flags; + bool outstanding; if (crtc == NULL) return; @@ -8972,7 +8973,11 @@ void intel_check_page_flip(struct drm_device *dev, int pipe) page_flip_completed(dev_priv, intel_crtc, intel_crtc->unpin_work); intel_crtc->unpin_work = NULL; } + outstanding = intel_crtc->unpin_work != NULL; spin_unlock_irqrestore(&dev->event_lock, flags); + + if (outstanding && INTEL_INFO(dev)->gen >= 6) + gen6_rps_boost(dev_priv); } static int intel_crtc_page_flip(struct drm_crtc *crtc, -- 1.7.9.5 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
