Commit 27e78a2a authored Jun 18, 2015 by Daniel Vetter

drm/i915: Filter out no-op frontbuffer tracking flushes



Paulo noticed that the fbc frontbuffer tracking flush callback
occasionally gets a call without any bit set. This can happen when we
have to filter flush calls due to e.g. gpu rendering. Filter these
out.

Reported-by: Paulo Zanoni <przanoni@gmail.com>
Cc: Paulo Zanoni <przanoni@gmail.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

parent fdbff928

drivers/gpu/drm/i915/intel_frontbuffer.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -175,6 +175,9 @@ void intel_frontbuffer_flush(struct drm_device *dev,
		frontbuffer_bits &= ~dev_priv->fb_tracking.busy_bits;
		mutex_unlock(&dev_priv->fb_tracking.lock);

		if (!frontbuffer_bits)
		return;

		intel_mark_fb_busy(dev, frontbuffer_bits);

		intel_edp_drrs_flush(dev, frontbuffer_bits);