Public bug reported:
[Impact]
After the codec PM optimization, laptops with SOF may take very long to
suspend. In addition to that, HDA may not be able to be runtim suspended
again after resume from hibernation.
[Fix]
Prevent the SOF driver touches codec during system suspend, and properly
refcount the PM usage counter.
[Test]
On an affected SOF system, it takes 5 mins to suspend.
On another affected HDA system, S4 resume causes high power consumption
becuase HDA controller can't be runtime suspended.
Both issues are gone by applying these patches.
[Where problems could occur]
If somehow any laptop depends on the old behavior to work properly, this
can break them. It's highly unlikely though.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: High
Status: Confirmed
** Affects: linux (Ubuntu Groovy)
Importance: High
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu Groovy)
Importance: Undecided
Status: Invalid
** Tags: oem-priority originate-from-1912602 ouagadougou
** Tags added: oem-priority originate-from-1912602 ouagadougou
** Also affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Groovy)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Focal)
Status: New => Invalid
** Changed in: linux (Ubuntu Groovy)
Status: New => Confirmed
** Changed in: linux-oem-5.10 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Groovy)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Groovy)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu Groovy)
Importance: Critical => High
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1912676
Title:
Fix regression introduced by codec PM change
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