On Thu, 26 Oct 2023 17:05:50 +0200, Stefan Binding wrote: > > There is a report of a single laptop which uses CS35L41 HDA having an > issue with System Suspend. This particular laptop uses S3 (Deep) Sleep. > The reported issue states that when the laptop resumes from a system > suspend, audio no longer works. > > The root cause of this issue is due to the CS35L41 being returned to us > in an unexpected state after a suspend/resume cycle. > When the driver resumes, it expects the parts to have been reset, which > leads to issues with audio and firmware loading. > > To prevent this issue, and the possibility of similar issues, patches > 2-5 force the driver to reset during probe, system suspend, and system > resume, which ensures that the part is always in the correct state. > Patches 6-8 are improvements in the suspend and firmware loading code, > which makes it easier to detect issues in the future, as well as > simplifiying the suspend code. > > Patch 1 is a fix for an incorrect configuration for the HP Zbook Fury > 17, which is the laptop which had the original issue. > > Stefan Binding (8): > ALSA: hda: cs35l41: Use reset label to get GPIO for HP Zbook Fury 17 > G9 > ALSA: hda: cs35l41: Assert reset before system suspend > ALSA: hda: cs35l41: Assert Reset prior to de-asserting in probe and > system resume > ALSA: hda: cs35l41: Run boot process during resume callbacks > ALSA: hda: cs35l41: Force a software reset after hardware reset > ALSA: hda: cs35l41: Do not unload firmware before reset in system > suspend > ALSA: hda: cs35l41: Check CSPL state after loading firmware > ASoC: cs35l41: Detect CSPL errors when sending CSPL commands Applied to for-next branch now. Thanks. Takashi
