Extending this timeout will prevent IH from storm interrupts coming
from SDMA while a page fault is active. Currently, on Aldebaran,
handling that many interrupts can take a lot of CPU time
(up to 4 seconds).
This eventually causes timeouts in other tasks.
Signed-off-by: Alex Sierra <alex.sie...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 5715be6770ec..823a367990bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1109,6 +1109,8 @@ static void sdma_v4_0_ctx_switch_enable(struct
amdgpu_device *adev, bool enable)
if (adev->asic_type == CHIP_ARCTURUS &&
adev->sdma.instance[i].fw_version >= 14)
WREG32_SDMA(i, mmSDMA0_PUB_DUMMY_REG2, enable);
+ /* Extend page fault timeout to avoid interrupt storm */
+ WREG32_SDMA(i, mmSDMA0_UTCL1_TIMEOUT, 0x00800080);
}
}
--
2.17.1
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