** Changed in: linux-firmware
Status: Unknown => New
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https://bugs.launchpad.net/bugs/2024774
Title:
AMD Rembrandt / Phoenix PSR-SU related freezes
Status in Linux Firmware:
New
Status in linux-firmware package in Ubuntu:
New
Status in linux-firmware source package in Jammy:
New
Status in linux-firmware source package in Lunar:
New
Status in linux-firmware source package in Mantic:
New
Bug description:
[ Impact ]
When using kernel 6.2 or later AMD has enabled PSR selective update (PSR-SU).
After a non-deterministic amount of time the system may hang with a message
like this in the logs:
"[amdgpu 0000:67:00.0: [drm] *ERROR* [CONNECTOR:78:eDP-1] commit wait timed
out]"
Affects users of laptops that contain:
* AMD Rembrandt (Yellow Carp) or AMD Phoenix (Pink Sardine) chips
* eDP panels with Parade TCONs (8-03 and 8-01 both reported to fail)
[ Test Plan ]
* Test an affected laptop with the newer firmware and ensure that PSR-SU
function can be enabled and system is stable.
* Ensure other functions such as hotplugging monitors and suspending
continue to work.
[ Where problems could occur ]
* Affected firmware only is loaded on Rembrandt and Phoenix laptops.
Problems would be localized to these machines.
[ Other Info ]
The minimum firmware needed to help these hangs:
* Rembrandt: 0x400003a or later
* Phoenix: 0x8001000 or later
The following commit upgrades the firmware for Rembrandt
(amdgpu/yellow_carp_dmcub.bin) to 0x400003c:
9dbd8ec2 ("amdgpu: DMCUB updates for various AMDGPU asics")
The following commit upgrades the firmware for Phoenix
(amdgpu/dcn_3_1_4_dmcub.bin) to 0x8001a00:
045b2136 ("amdgpu: update DMCUB to v0.0.172.0 for various AMDGPU ASICs")
The TCON in a given laptop can be identified from the DPCD with this script:
https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/psr.py
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