From: Ville Syrjälä Date: Tue, 29 Jan 2013 16:13:34 +0000 (+0200) Subject: drm/i915: Don't wait for page flips if there was GPU reset X-Git-Tag: next-20130220~64^2~30 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=abe509316bb0a6ea5d90ec450496f20b83755b8d;p=karo-tx-linux.git drm/i915: Don't wait for page flips if there was GPU reset If a GPU reset occurs while a page flip has been submitted to the ring, the flip will never complete once the ring has been reset. The GPU reset can be detected by sampling the reset_counter before the flip is submitted, and then while waiting for the flip, the sampled counter is compared with the current reset_counter value. Signed-off-by: Ville Syrjälä Reviewed-by: Damien Lespiau [danvet: Move the reset_counter assignment to an earlier place in common code as discussed on the mailing list.] Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=60140 Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 6dfb49c25ea8..593c66801d56 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2868,10 +2868,12 @@ static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); unsigned long flags; bool pending; - if (i915_reset_in_progress(&dev_priv->gpu_error)) + if (i915_reset_in_progress(&dev_priv->gpu_error) || + intel_crtc->reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter)) return false; spin_lock_irqsave(&dev->event_lock, flags); @@ -7250,6 +7252,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, work->enable_stall_check = true; atomic_inc(&intel_crtc->unpin_work_count); + intel_crtc->reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); ret = dev_priv->display.queue_flip(dev, crtc, fb, obj); if (ret) diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 13afb37d8dec..006b5aa35bb3 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -235,6 +235,9 @@ struct intel_crtc { /* We can share PLLs across outputs if the timings match */ struct intel_pch_pll *pch_pll; uint32_t ddi_pll_sel; + + /* reset counter value when the last flip was submitted */ + unsigned int reset_counter; }; struct intel_plane {