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drm/radeon: improve semaphore debugging on lockup

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Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jerome Glisse 2013-01-11 15:19:43 -05:00 • committed by Alex Deucher
parent c18b117049
commit 5f0839c11e
3 changed files with 8 additions and 0 deletions
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4
drivers/gpu/drm/radeon/radeon_semaphore.c
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@ -95,6 +95,10 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
/* we assume caller has already allocated space on waiters ring */
radeon_semaphore_emit_wait(rdev, waiter, semaphore);
/* for debugging lockup only, used by sysfs debug files */
rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr;
rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr;
return 0;
}