Commit 0065e5f5 authored May 03, 2020 by Chris Wilson

drm/i915/display: Warn if the FBC is still writing to stolen on removal

If the FBC is still writing into stolen, it will overwrite any future
users of that stolen region. Check before release, just to ease any
concerns -- we can remove it again later if it is barking up the wrong
tree.

References: https://gitlab.freedesktop.org/drm/intel/-/issues/1635

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200503180034.20010-1-chris@chris-wilson.co.uk

parent 690d22da

drivers/gpu/drm/i915/display/intel_fbc.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -540,6 +540,9 @@ static void __intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv)
		{
		struct intel_fbc *fbc = &dev_priv->fbc;

		if (WARN_ON(intel_fbc_hw_is_active(dev_priv)))
		return;

		if (!drm_mm_node_allocated(&fbc->compressed_fb))
		return;