[Ask for help] ATI HD 7470 card on arm64 platform

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Hi,

We are trying ATI HD 7470 card on arm64 platform D05 with kernel 4.1.40.
But it failed with kernel log:
radeon 0005:01:00: ring 0 stalled for more than 10000msec
radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001
last fence id 0x0000000000000002 on ring0)
radeon 0005:01:00: ring 0 stalled for more than 10500msec
radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001
last fence id 0x0000000000000002 on ring0)
radeon 0005:01:00: ring 0 stalled for more than 11000msec
radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001
last fence id 0x0000000000000002 on ring0)
radeon 0005:01:00: ring 0 stalled for more than 11500msec
radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001
last fence id 0x0000000000000002 on ring0)
...

Any clue?
Any required setting on BIOS IO mem bar video ram? It seems that our
PCIE controller doesn't support cacheable feature for IO mem bar video
ram.


Best,
Xinliang


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