[PATCH v2] ALSA: hda: fix jack detection with Realtek codecs when in D3

[Takashi Iwai]

On Mon, 12 Oct 2020 12:27:04 +0200,
Kai Vehmanen wrote:
> 
> In case HDA controller becomes active, but codec is runtime suspended,
> jack detection is not successful and no interrupt is raised. This has
> been observed with multiple Realtek codecs and HDA controllers from
> different vendors. Bug does not occur if both codec and controller are
> active, or both are in suspend. Bug can be easily hit on desktop systems
> with no built-in speaker.
> 
> The problem can be fixed by powering up the codec once after every
> controller runtime resume. Even if codec goes back to suspend later, the
> jack detection will continue to work. Add a flag to 'hda_codec' to
> describe codecs that require this flow from the controller driver.
> Modify __azx_runtime_resume() to use pm_request_resume() to make the
> intent clearer.
> 
> Mark all Realtek codecs with the new forced_resume flag.
> 
> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=209379
> Cc: Kailang Yang <kailang at realtek.com>
> Co-developed-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
> Signed-off-by: Kai Vehmanen <kai.vehmanen at linux.intel.com>

This deserves for Cc-to-stable.  I applied with it now.
Thanks!


Takashi