[PATCH 0/5][SRU][OEM-5.14][U] Fix Cirrus CS8409 pop noise at rebooting

[You-Sheng Yang]

BugLink: https://bugs.launchpad.net/bugs/1942043

[Impact]

HD-audio codec shutdown is not quite right when powering off the
controller side. This causes pop noises on some platforms.

[Fix]

While previously in bug 1939541, a local fix for Cirrus CS8409 only is
proposed the upstream as in
https://lore.kernel.org/lkml/20210812183433.6330-2-vitalyr@opensource.cirrus.com/
. This initiated a discuss to create a generic solution as in
https://lore.kernel.org/all/20210813081230.4268-1-tiwai@suse.de/ .

[Test Case]

Shutdown Ubuntu that is running a patched kernel and see if a pop sound
is still made.

[Where problems could occur]

While this tries to suspend the codec devices at shutting down, out of
tree drivers without (runtime-)suspend support may fail to react
correctly. And since this removes .reboot_notify callback from struct
hda_codec_ops, it may break such oot drivers, too.

[Other Info]

This depends on patches for https://bugs.launchpad.net/bugs/1939541 .

Takashi Iwai (4):
  ALSA: hda: conexant: Turn off EAPD at suspend, too
  ALSA: hda: Suspend codec at shutdown
  ALSA: hda: Nuke unused reboot_notify callback
  ALSA: hda: Disable runtime resume at shutdown

You-Sheng Yang (1):
  Revert "UBUNTU: SAUCE: ALSA: hda/cs8409: Prevent pops and clicks
    during reboot"

 include/sound/hda_codec.h      |  1 -
 sound/pci/hda/hda_bind.c       |  8 +----
 sound/pci/hda/hda_codec.c      | 12 ++++++++
 sound/pci/hda/hda_generic.c    | 19 ------------
 sound/pci/hda/hda_generic.h    |  1 -
 sound/pci/hda/hda_local.h      |  2 ++
 sound/pci/hda/patch_analog.c   |  1 -
 sound/pci/hda/patch_ca0132.c   |  6 ----
 sound/pci/hda/patch_conexant.c | 15 ++++++---
 sound/pci/hda/patch_cs8409.c   | 56 +++++++++++++++-------------------
 sound/pci/hda/patch_realtek.c  | 13 --------
 sound/pci/hda/patch_sigmatel.c |  1 -
 12 files changed, 50 insertions(+), 85 deletions(-)

-- 
2.32.0