drm/radeon/kms: match r6xx/r7xx/evergreen asic_reset with previous asics
Don't reset if the engine isn't busy. This matches the behavior of
previous asics. Reseting a non-hung block can lead to a hang.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=33272
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index a8973ac..677af91 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2201,6 +2201,9 @@
struct evergreen_mc_save save;
u32 grbm_reset = 0;
+ if (!(RREG32(GRBM_STATUS) & GUI_ACTIVE))
+ return 0;
+
dev_info(rdev->dev, "GPU softreset \n");
dev_info(rdev->dev, " GRBM_STATUS=0x%08X\n",
RREG32(GRBM_STATUS));