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

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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
This commit is contained in:
Chris Wilson 2020-05-03 19:00:34 +01:00
parent 690d22dafa
commit 0065e5f5cc
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/display/intel_fbc.c
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@ -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;