linux-kernel - Re: [PATCH 2/2] ASoC: SOF: Intel: hda: Avoid checking jack on system suspend

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Date:   Thu, 31 Dec 2020 11:55:10 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     pierre-louis.bossart@...ux.intel.com, lgirdwood@...il.com,
        ranjani.sridharan@...ux.intel.com, kai.vehmanen@...ux.intel.com,
        daniel.baluta@....com, Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Keyon Jie <yang.jie@...ux.intel.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Marcin Rajwa <marcin.rajwa@...ux.intel.com>,
        Payal Kshirsagar <payalskshirsagar1234@...il.com>,
        sound-open-firmware@...a-project.org (moderated list:SOUND - SOUND OPEN
        FIRMWARE (SOF) DRIVERS),
        alsa-devel@...a-project.org (moderated list:SOUND - SOC LAYER / DYNAMIC
        AUDIO POWER MANAGEM...), linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH 2/2] ASoC: SOF: Intel: hda: Avoid checking jack on system suspend

On Tue, 29 Dec 2020 14:38:15 +0100,
Kai-Heng Feng wrote:
> 
> System takes a very long time to suspend after commit 215a22ed31a1
> ("ALSA: hda: Refactor codec PM to use direct-complete optimization"):
> [   90.065964] PM: suspend entry (s2idle)
> [   90.067337] Filesystems sync: 0.001 seconds
> [   90.185758] Freezing user space processes ... (elapsed 0.002 seconds) done.
> [   90.188713] OOM killer disabled.
> [   90.188714] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
> [   90.190024] printk: Suspending console(s) (use no_console_suspend to debug)
> [   90.904912] intel_pch_thermal 0000:00:12.0: CPU-PCH is cool [49C], continue to suspend
> [  321.262505] snd_hda_codec_realtek ehdaudio0D0: Unable to sync register 0x2b8000. -5
> [  328.426919] snd_hda_codec_realtek ehdaudio0D0: Unable to sync register 0x2b8000. -5
> [  329.490933] ACPI: EC: interrupt blocked
> 
> That commit keeps codec suspended during the system suspend. However,
> SOF driver's runtime resume, which is for system suspend, calls
> hda_codec_jack_check() and schedules jackpoll_work. The jackpoll
> work uses snd_hda_power_up_pm() which tries to resume the codec in
> system suspend path, hence blocking the suspend process.
> 
> So only check jack status if it's not in system PM process.

After your previous patch set, the legacy HDA does queue the
jackpoll_work only if jackpoll_interval is set.  I suppose rather the
same rule would be applied?


thanks,

Takashi

> 
> Fixes: 215a22ed31a1 ("ALSA: hda: Refactor codec PM to use direct-complete optimization")
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
> ---
>  sound/soc/sof/intel/hda-dsp.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/soc/sof/intel/hda-dsp.c b/sound/soc/sof/intel/hda-dsp.c
> index 7d00107cf3b2..1c5e05b88a90 100644
> --- a/sound/soc/sof/intel/hda-dsp.c
> +++ b/sound/soc/sof/intel/hda-dsp.c
> @@ -685,7 +685,8 @@ static int hda_resume(struct snd_sof_dev *sdev, bool runtime_resume)
>  	/* check jack status */
>  	if (runtime_resume) {
>  		hda_codec_jack_wake_enable(sdev, false);
> -		hda_codec_jack_check(sdev);
> +		if (sdev->system_suspend_target == SOF_SUSPEND_NONE)
> +			hda_codec_jack_check(sdev);
>  	}
>  
>  	/* turn off the links that were off before suspend */
> -- 
> 2.29.2
>