The FBC requires a couple of contiguous buffers, which we allocate from
stolen memory. If stolen memory is unavailable, we cannot allocate those
buffers and so cannot support FBC. Mark it so.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/display/intel_fbc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c
b/drivers/gpu/drm/i915/display/intel_fbc.c
index dc34b23e2320..3111ecaeabd0 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1320,6 +1320,9 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
fbc->enabled = false;
fbc->active = false;
+ if (!drm_mm_initialized(&dev_priv->mm.stolen))
+ mkwrite_device_info(dev_priv)->display.has_fbc = false;
+
if (need_fbc_vtd_wa(dev_priv))
mkwrite_device_info(dev_priv)->display.has_fbc = false;
--
2.23.0
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