From: "Sridharan, Ranjani" <ranjani.sridharan@intel.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: Linux-ALSA <alsa-devel@alsa-project.org>,
Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: Re: [alsa-devel] [PATCH 7/8] ALSA: pcm: Add card sync_irq field
Date: Thu, 21 Nov 2019 11:22:03 -0800 [thread overview]
Message-ID: <CAFQqKeWVuJs+bnZsrYAHdke0pZpBSmP71RFVrfwVE3=P4A7hsw@mail.gmail.com> (raw)
In-Reply-To: <CAFQqKeVsQ1AjjKgS-HJ0-mg7JbbmMVjJcUB7wbvsbyz9e2TqLg@mail.gmail.com>
>
> > >
>> > > I couldn't find anything obvious. Could you try without changing
>> > > snd_sof_pcm_period_elapsed(), i.e. only adding the stuff and calling
>> > > sync_stop, in order to see whether the additional stuff broke
>> > > anything?
>> > It is indeed the removal of snd_sof_pcm_period_elapsed() that makes the
>> > device hang when the stream is stoppped. But that's a bit surprising
>> > given that all I tried was using the snd_pcm_period_elapsed() directly
>> > instead of scheduling the delayed work to call it.
>>
>> If I read the code correctly, this can't work irrelevantly from the
>> sync_stop stuff. The call of period_elapsed is from
>> hda_dsp_stream_check() which is performed in bus->reg_lock spinlock in
>> hda_dsp_stream_threaded_handler(). Meanwhile, the XRUN trigger goes
>> to hda_dsp_pcm_trigger() that follows hda_dsp_stream_trigger(), and
>> this function expects the sleepable context due to
>> snd_sof_dsp_read_poll_timeout() call.
>>
>> So something like below works?
>>
>>
>> Takashi
>>
>> --- a/sound/soc/sof/intel/hda-stream.c
>> +++ b/sound/soc/sof/intel/hda-stream.c
>> @@ -592,8 +592,11 @@ static bool hda_dsp_stream_check(struct hdac_bus
>> *bus, u32 status)
>> continue;
>>
>> /* Inform ALSA only in case not do that with IPC
>> */
>> - if (sof_hda->no_ipc_position)
>> - snd_sof_pcm_period_elapsed(s->substream);
>> + if (sof_hda->no_ipc_position) {
>> + spin_unlock_irq(&bus->reg_lock);
>> + snd_pcm_period_elapsed(s->substream);
>> + spin_lock_irq(&bus->reg_lock);
>>
> Thanks, Takashi. Yes, I realized it this morning as well that it is due to
> the reg_lock. It does work with this change now. I will run some stress
> tests with this change and get back with the results.
>
Hi Takashi,
Sorry the stress tests took a while.
As we discussed earlier, adding the sync_stop() op didnt quite help the SOF
driver in removing the delayed work for snd_pcm_period_elapsed().
Thanks,
Ranjani
>
> Thanks,
> Ranjani
>
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next prev parent reply other threads:[~2019-11-21 19:23 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-17 8:53 [alsa-devel] [PATCH 0/8] ALSA: pcm: API cleanups and extensions Takashi Iwai
2019-11-17 8:53 ` [alsa-devel] [PATCH 1/8] ALSA: pcm: Introduce managed buffer allocation mode Takashi Iwai
2019-11-18 16:24 ` Pierre-Louis Bossart
2019-11-18 18:46 ` Takashi Iwai
2019-11-17 8:53 ` [alsa-devel] [PATCH 2/8] ALSA: docs: Update for " Takashi Iwai
2019-11-17 8:53 ` [alsa-devel] [PATCH 3/8] ALSA: pcm: Allow NULL ioctl ops Takashi Iwai
2019-11-17 8:53 ` [alsa-devel] [PATCH 4/8] ALSA: docs: Update document about the default PCM " Takashi Iwai
2019-11-17 8:53 ` [alsa-devel] [PATCH 5/8] ALSA: pcm: Move PCM_RUNTIME_CHECK() macro into local header Takashi Iwai
2019-11-17 9:42 ` kbuild test robot
2019-11-17 10:05 ` Takashi Iwai
2019-11-17 10:28 ` kbuild test robot
2019-11-17 8:53 ` [alsa-devel] [PATCH 6/8] ALSA: pcm: Add the support for sync-stop operation Takashi Iwai
2019-11-18 16:33 ` Pierre-Louis Bossart
2019-11-18 18:47 ` Takashi Iwai
2019-11-17 8:53 ` [alsa-devel] [PATCH 7/8] ALSA: pcm: Add card sync_irq field Takashi Iwai
2019-11-18 16:38 ` Pierre-Louis Bossart
2019-11-18 18:52 ` Takashi Iwai
2019-11-18 19:20 ` Sridharan, Ranjani
2019-11-18 19:49 ` Takashi Iwai
2019-11-18 19:55 ` Sridharan, Ranjani
2019-11-18 20:40 ` Takashi Iwai
2019-11-18 23:47 ` Ranjani Sridharan
2019-11-19 6:44 ` Takashi Iwai
2019-11-19 7:40 ` Ranjani Sridharan
2019-11-19 8:24 ` Takashi Iwai
2019-11-19 9:39 ` Takashi Iwai
2019-11-19 16:36 ` Ranjani Sridharan
2019-11-19 21:27 ` Takashi Iwai
2019-11-19 21:43 ` Sridharan, Ranjani
2019-11-21 19:22 ` Sridharan, Ranjani [this message]
2019-11-21 20:34 ` Takashi Iwai
2019-11-21 20:46 ` Sridharan, Ranjani
2019-11-21 21:13 ` Takashi Iwai
2019-11-21 21:17 ` Sridharan, Ranjani
2019-11-21 21:28 ` Takashi Iwai
2019-11-21 21:45 ` Sridharan, Ranjani
2019-11-22 4:08 ` Jie, Yang
2019-11-17 8:53 ` [alsa-devel] [PATCH 8/8] ALSA: docs: Update about the new PCM sync_stop ops Takashi Iwai
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