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: Tue, 19 Nov 2019 13:43:43 -0800 [thread overview]
Message-ID: <CAFQqKeVsQ1AjjKgS-HJ0-mg7JbbmMVjJcUB7wbvsbyz9e2TqLg@mail.gmail.com> (raw)
In-Reply-To: <s5hy2wbwo8c.wl-tiwai@suse.de>
On Tue, Nov 19, 2019 at 1:28 PM Takashi Iwai <tiwai@suse.de> wrote:
> On Tue, 19 Nov 2019 17:36:46 +0100,
> Ranjani Sridharan wrote:
> >
> > On Tue, 2019-11-19 at 09:24 +0100, Takashi Iwai wrote:
> > > On Tue, 19 Nov 2019 08:40:25 +0100,
> > > Ranjani Sridharan wrote:
> > > >
> > > > > >
> > > > > > Hi Takashi,
> > > > > >
> > > > > > I just realized that In the SOF driver, we only set the
> > > > > > component
> > > > > > driver ops. The pcm ops are set when creating the new pcm. So,
> > > > > > should I
> > > > > > also add the sync_stop op in the component driver and set the
> > > > > > pcm
> > > > > > sync_stop op to point to the component sync_stop op? Just
> > > > > > wanted to
> > > > > > confirm if I am on the right track.
> > > > >
> > > > > Yes, I didn't touch this yet, but that's the way to go I suppose.
> > > > > One caveat is that this ops is optional and needs NULL as
> > > > > default,
> > > > > hence you'd need to set only when defined, like copy_user, page
> > > > > or
> > > > > mmap ops, at least.
> > > >
> > > > Hi Takashi,
> > > >
> > > > This is what I tried in the SOF driver:
> > > > https://github.com/thesofproject/linux/pull/1513/commits
> > > >
> > > > And it seems to cause the system to hang when I stop the stream and
> > > > I
> > > > have no meaningful logs to pinpoint to the problem. Could you
> > > > please
> > > > have a look at the 4 commits that I have added to your series and
> > > > let
> > > > me know what I could be missing?
> > >
> > > 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.
Thanks,
Ranjani
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
next prev parent reply other threads:[~2019-11-19 21:44 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 [this message]
2019-11-21 19:22 ` Sridharan, Ranjani
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAFQqKeVsQ1AjjKgS-HJ0-mg7JbbmMVjJcUB7wbvsbyz9e2TqLg@mail.gmail.com \
--to=ranjani.sridharan@intel.com \
--cc=alsa-devel@alsa-project.org \
--cc=pierre-louis.bossart@linux.intel.com \
--cc=ranjani.sridharan@linux.intel.com \
--cc=tiwai@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).