Reuse framebuffer after a kexec (amdgpu / efifb)

[Guilherme G. Piccoli]

On 10/12/2021 12:13, Christian König wrote:
> [...]
> How about issuing a PCIe reset and re-initializing the ASIC with just 
> the VBIOS?
> 
> That should be pretty straightforward I think.
> 
> Christian.


Thanks Christian, that'd be perfect! Is it feasible? Per Alex comment,
we'd need to run atombios commands to reprogram the timings, display
info, etc...like a small driver would do, a full init.

Also, what kind of PCIe reset is recommended for this adapter? Like a
hot reset, powering-off/re-power, FLR or that MODE2 reset present in
amdgpu code? Remembering this is an APU device.

Thanks a lot!