[igt-dev] [PATCH i-g-t] lib/i915: Assume unknown hardware just works

[Chris Wilson]

If we don't recognise the hardware, then it can't be any of the known
broken HW where MI_STORE_DWORD_IMM either uses physical addressing or
simply fails catastrophic. As it's not known to be broken, assume it
works.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 lib/igt_gt.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/igt_gt.c b/lib/igt_gt.c
index 101627973..3e5eb47db 100644
--- a/lib/igt_gt.c
+++ b/lib/igt_gt.c
@@ -565,6 +565,9 @@ bool gem_class_can_store_dword(int fd, int class)
 	const struct intel_device_info *info = intel_get_device_info(devid);
 	const int gen = ffs(info->gen);
 
+	if (info->gen == 0) /* unknown, assume it just works */
+		return true;
+
 	if (gen <= 2) /* requires physical addresses */
 		return false;
 
@@ -572,7 +575,7 @@ bool gem_class_can_store_dword(int fd, int class)
 		return false; /* only supports physical addresses */
 
 	if (gen == 6 && class == I915_ENGINE_CLASS_VIDEO)
-		return false;
+		return false; /* broken, unbelievably broken */
 
 	if (info->is_broadwater)
 		return false; /* Not sure yet... */
-- 
2.27.0.rc0