It looks like this will be rendered unnecessary by upcoming changes to
the DRM core: http://www.spinics.net/lists/dri-devel/msg143831.html
The patch will still be needed for kernels that have already been
released. I will proceed with this process.
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hibmc driver does not include "pci:" prefix in bus ID
Status in linux package in Ubuntu:
On the HiSilicon D05 (arm64) board, X crashes when started. 
The crash is attributable to the bus ID that the hibmc driver reports for the
hibmc graphics card on the board. In particular, the bus id is missing the
"pci:" prefix that most other cards provide: 
- The busid reported on the arm64 system is "0007:a1:00.0"
- The busid reported on a amd64 system is "pci:0000:00:02.0"
X tests for this prefix. A missing prefix for PCI cards leads to an
A patch is attached, which prevents the crash. 
I submitted the patch upstream. However, upstream is refactoring the
drm core, and set_busid is going away, so I'm working on testing if
this will be necessary once that lands. 
This bug exists to help keep track of the status of this fix across
upstream and then into our kernels.
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