[SRU][N/O][PATCH 0/2] alsa: Headphone and Speaker couldn't output sound intermittently

[Hui Wang]

BugLink: https://bugs.launchpad.net/bugs/2077690

The patches are in the linux-next already, it will be in the unstable
kernel automatically, and the patches will be in stable sooner or
later, so it will be in the Jammy kernel automatically in the future.

And our oem project requires the patches to be in the hwe-6.8 ASAP,
Here I submit the SRU to Noble and Oracular.

[Impact]
On a Dell machine, we plug a speaker or headset into the front audio
port, play sound to the speaker or headset, we get a 1/6 chance that
the speaker or headset couldn't output sound.


[Fix]
pick 2 commits from linux-next

[Test]
booting with the patched kernel,
 1. plug a speaker or headset in the front port
 2. play sound
 3. check if we can hear the sound or not
 4. repeat the step 1 ~ 3 20 times
 5. there is no failure

[Where problems could occur]
The patches change the depop and headset_type_detect routine, so it
is possible to introduce regression on pop noise and headset detection,
for realtek codec of alc285 and alc256 family, but the regression
possibility is very low, we tested the patches on a couple of Dell and
Lenovo machines, everything worked as well as before.


Kailang Yang (2):
  ALSA: hda/realtek - Fixed ALC256 headphone no sound
  ALSA: hda/realtek - FIxed ALC285 headphone no sound

 sound/pci/hda/patch_realtek.c | 76 +++++++++++++++++++++++------------
 1 file changed, 51 insertions(+), 25 deletions(-)

-- 
2.34.1