RFT drm/i95: Mark GGTT as incoherent for gen10+

Commit Message

Chris Wilson Aug. 1, 2018, 10:05 a.m. UTC

We haven't had a full run yet on on gen10+ so it's hard to tell if the
userspace tests are confirming the same as live_objects/live_coherency
selftests is hinting.
---
 drivers/gpu/drm/i915/i915_pci.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Chris Wilson Aug. 1, 2018, 10:40 a.m. UTC | #1

Quoting Patchwork (2018-08-01 11:34:58)
>     igt@drv_selftest@live_objects:
>       fi-cnl-psr:         DMESG-FAIL (fdo#107398) -> PASS

Well the bad news is that it did indeed fix the iomap incoherency we
have in CI on both cnl and icl.

Sigh.
-Chris

Patch

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 = {