Re: Reuse framebuffer after a kexec (amdgpu / efifb)

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!