Chris Wilson <[email protected]> writes: > The evidence suggests that we need to start treating writes via GGTT as > incoherent for gen10+, that is that they are internally buffered and not > immediately visible via a read along a different physical path. > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107398 > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107400
Looks like it. And we don't have better explanations at this point. Reviewed-by: Mika Kuoppala <[email protected]> > Signed-off-by: Chris Wilson <[email protected]> > Cc: Mika Kuoppala <[email protected]> > --- > drivers/gpu/drm/i915/i915_pci.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c > index e443fe44da3a..adf80563d0a1 100644 > --- a/drivers/gpu/drm/i915/i915_pci.c > +++ b/drivers/gpu/drm/i915/i915_pci.c > @@ -590,6 +590,7 @@ static const struct intel_device_info > intel_coffeelake_gt3_info = { > GEN9_FEATURES, \ > GEN(10), \ > .ddb_size = 1024, \ > + .has_coherent_ggtt = false, \ > GLK_COLORS > > static const struct intel_device_info intel_cannonlake_info = { > -- > 2.18.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
