Public bug reported:
[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.
** Affects: linux (Ubuntu)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux (Ubuntu Groovy)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu Groovy)
Importance: Undecided
Status: Invalid
** Also affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.6 (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.6 (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Groovy)
Status: New => Confirmed
** Changed in: linux (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Groovy)
Importance: Undecided => Medium
** Changed in: linux-oem-5.6 (Ubuntu Groovy)
Status: New => Invalid
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1899586
Title:
Fix broken MSI interrupt after HDA controller was suspended
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