ACK: [RESEND] [SRU] [F/G/Unstable/OEM-5.6] [PATCH 0/3] Fix broken MSI interrupt after HDA controller was suspended

[Stefan Bader]

On 13.10.20 09:53, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1899586
> 
> [Impact]
> After HDA controller gets suspended and resumed, no MSI interrupt raised
> when plugging headset to the audio jack.
> 
> [Fix]
> Power up the Realtek codec when HDA controller runtime resumes.
> 
> [Test]
> 1) Make sure both codec and HDA controller are runtime suspended.
> 2) Runtime resume the HDA controller without runtime resume the codec.
> 3) Plug a headset and see if the system can detect anything.
> 
> With the fix applied, we can see azx_interrupt() is working again by
> using ftrace.
> 
> [Regression Potential]
> If there's any system that is not affected by this issue, runtime-resume
> the HDA controller will take a slightly longer time. It's rather
> unlikely, since _all_ systems with Realtek codec we tested have this
> issue, regardless of AMD or Intel.
> 
> Kai Vehmanen (1):
>   UBUNTU: SAUCE: ALSA: hda: fix jack detection with Realtek codecs when
>     in D3
> 
> Takashi Iwai (2):
>   ALSA: hda: Skip controller resume if not needed
>   ALSA: hda: Always use jackpoll helper for jack update after resume
> 
>  include/sound/hda_codec.h     |  6 ++++++
>  sound/pci/hda/hda_codec.c     | 28 +++++++++++++++-----------
>  sound/pci/hda/hda_intel.c     | 37 ++++++++++++++++++++---------------
>  sound/pci/hda/patch_realtek.c |  1 +
>  4 files changed, 45 insertions(+), 27 deletions(-)
> 
Acked-by: Stefan Bader <stefan.bader at canonical.com>

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