From: Ville Syrjälä <[email protected]> intel_pipe_set_base() never actually waited for any pending page flips on the CRTC. It looks like it tried to, by calling intel_finish_fb() on the current front buffer. But the pending flips were actually tracked in the BO of the previous front buffer, so the call to intel_finish_fb() never did anything useful.
Now even the pending_flip counter is gone, so we should just use intel_crtc_wait_for_pending_flips(), but since we're already holding struct_mutex when we would call that function, we need another version of it, that itself doesn't lock struct_mutex. Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/intel_display.c | 51 +++++++++++++++++++++------------ 1 files changed, 32 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 1a38267..7bf4749 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2228,6 +2228,37 @@ static void intel_crtc_update_sarea_pos(struct drm_crtc *crtc, int x, int y) } } +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; + unsigned long flags; + bool pending; + + if (atomic_read(&dev_priv->mm.wedged)) + return false; + + spin_lock_irqsave(&dev->event_lock, flags); + pending = to_intel_crtc(crtc)->unpin_work != NULL; + spin_unlock_irqrestore(&dev->event_lock, flags); + + return pending; +} + +static void intel_crtc_wait_for_pending_flips_locked(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + if (crtc->fb == NULL) + return; + + wait_event(dev_priv->pending_flip_queue, + !intel_crtc_has_pending_flip(crtc)); + + intel_finish_fb(crtc->fb); +} + static int intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, struct drm_framebuffer *fb) @@ -2261,8 +2292,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, return ret; } - if (crtc->fb) - intel_finish_fb(crtc->fb); + intel_crtc_wait_for_pending_flips_locked(crtc); ret = dev_priv->display.update_plane(crtc, fb, x, y); if (ret) { @@ -2901,23 +2931,6 @@ static void ironlake_fdi_disable(struct drm_crtc *crtc) udelay(100); } -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; - unsigned long flags; - bool pending; - - if (atomic_read(&dev_priv->mm.wedged)) - return false; - - spin_lock_irqsave(&dev->event_lock, flags); - pending = to_intel_crtc(crtc)->unpin_work != NULL; - spin_unlock_irqrestore(&dev->event_lock, flags); - - return pending; -} - static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; -- 1.7.8.6 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
