Reuse framebuffer after a kexec (amdgpu / efifb)
Guilherme G. Piccoli
gpiccoli at igalia.com
Fri Dec 10 07:24:08 PST 2021
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!
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