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authorAlex Deucher <alexander.deucher@amd.com>2013-02-28 10:03:08 -0500
committerAlex Deucher <alexander.deucher@amd.com>2013-03-07 12:58:58 -0500
commitd808fc882928bfe3cab87dd960ca28715e461ce4 (patch)
tree5fefdb74efbb7c4e235a315b8dbc453ed0110f95 /drivers/gpu/drm/radeon/ni.c
parente8fc41377f5037ff7a661ea06adc05f1daec1548 (diff)
downloadlinux-d808fc882928bfe3cab87dd960ca28715e461ce4.tar.bz2
drm/radeon: skip MC reset as it's probably not hung
The MC is mostly likely busy (e.g., display requests), not hung so no need to reset it. Doing an MC reset is tricky and not particularly reliable. Fixes hangs in certain cases. Reported-by: Josh Boyer <jwboyer@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/ni.c')
-rw-r--r--drivers/gpu/drm/radeon/ni.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 7cead763be9e..d4c633e12863 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -1381,6 +1381,12 @@ static u32 cayman_gpu_check_soft_reset(struct radeon_device *rdev)
if (tmp & L2_BUSY)
reset_mask |= RADEON_RESET_VMC;
+ /* Skip MC reset as it's mostly likely not hung, just busy */
+ if (reset_mask & RADEON_RESET_MC) {
+ DRM_DEBUG("MC busy: 0x%08X, clearing.\n", reset_mask);
+ reset_mask &= ~RADEON_RESET_MC;
+ }
+
return reset_mask;
}