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Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel

From Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel
Date 2016-06-22 14:40 +0200
Message-ID <rMPBM-3lU-13@gated-at.bofh.it> (permalink)
References (6 earlier) <rLxdU-1O2-23@gated-at.bofh.it> <rM5pf-7ws-11@gated-at.bofh.it> <rM6v0-8aw-61@gated-at.bofh.it> <rMxYe-sG-7@gated-at.bofh.it> <rMBfr-2Hb-13@gated-at.bofh.it>
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On 6/21/16 12:40 PM, Richard Cochran wrote:
> On Tue, Jun 21, 2016 at 10:45:18AM -0700, Pierre-Louis Bossart wrote:
>> You can experiment with the 'dma' and 'link' timestamps today on any
>> HDaudio-based device. Like I said the synchronized part has not been
>> upstreamed yet (delays + dependency on ART-to-TSC conversions that made it
>> in the kernel recently)
>
> Can you point me to any open source apps using the dma/link
> timestamps?

Those timestamps are only used in custom applications at the moment, not 
'mainstream' open source.
It takes time for new kernel capabilities to trickle into userspace, 
applications usually align on the lowest hardware common denominator. In 
addition, most applications don't access the kernel directly but go 
through an audio server or HAL which needs to be updated as well so it's 
a two-level dependency. These timestamps can be directly mappped to the 
Android AudioTrack.getTimeStamp API though.

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Thread

[very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-12 01:10 +0200
  [very-RFC 1/8] TSN: add documentation Henrik Austad <henrik@austad.us> - 2016-06-12 01:10 +0200
  [very-RFC 3/8] Adding TSN-driver to Intel I210 controller Henrik Austad <henrik@austad.us> - 2016-06-12 01:10 +0200
  [very-RFC 6/8] Add TSN event-tracing Henrik Austad <henrik@austad.us> - 2016-06-12 01:10 +0200
    Re: [very-RFC 6/8] Add TSN event-tracing Steven Rostedt <rostedt@goodmis.org> - 2016-06-12 19:00 +0200
      Re: [very-RFC 6/8] Add TSN event-tracing Henrik Austad <henrik@austad.us> - 2016-06-12 23:30 +0200
        Re: [very-RFC 6/8] Add TSN event-tracing Steven Rostedt <rostedt@goodmis.org> - 2016-06-13 04:30 +0200
          Re: [very-RFC 6/8] Add TSN event-tracing Henrik Austad <henrik@austad.us> - 2016-06-13 09:30 +0200
  [very-RFC 8/8] MAINTAINERS: add TSN/AVB-entries Henrik Austad <henrik@austad.us> - 2016-06-12 01:10 +0200
  Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-13 13:50 +0200
    Re: [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-13 15:10 +0200
      Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-13 21:40 +0200
        Re: [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-14 11:40 +0200
          Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-14 20:30 +0200
            Re: [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-14 22:40 +0200
              Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-15 09:10 +0200
                Re: [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-15 10:00 +0200
                Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-15 13:50 +0200
              Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-15 09:20 +0200
      Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-13 21:40 +0200
    Re: [very-RFC 0/8] TSN driver for the kernel Arnd Bergmann <arnd@linaro.org> - 2016-06-13 15:20 +0200
    Re: [very-RFC 0/8] TSN driver for the kernel John Fastabend <john.fastabend@gmail.com> - 2016-06-13 18:00 +0200
      Re: [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-14 10:40 +0200
    Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-13 22:00 +0200
      Re: [very-RFC 0/8] TSN driver for the kernel One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-06-14 13:20 +0200
        Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-14 19:10 +0200
        Re: [very-RFC 0/8] TSN driver for the kernel Takashi Sakamoto <o-takashi@sakamocchi.jp> - 2016-06-15 05:30 +0200
          Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-15 10:10 +0200
            Re: [very-RFC 0/8] TSN driver for the kernel Takashi Sakamoto <o-takashi@sakamocchi.jp> - 2016-06-18 07:30 +0200
              Re: [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-19 00:50 +0200
                Re: [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-19 11:50 +0200
                Re: [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-20 11:50 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> - 2016-06-20 13:20 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-20 14:00 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-20 14:30 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-20 15:00 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-20 17:40 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Takashi Iwai <tiwai@suse.de> - 2016-06-21 08:00 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-21 08:40 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Takashi Iwai <tiwai@suse.de> - 2016-06-21 08:50 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> - 2016-06-21 19:20 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> - 2016-06-21 19:50 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-21 23:20 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> - 2016-06-22 14:40 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Henrik Austad <henrik@austad.us> - 2016-06-23 12:40 +0200
                Re: [alsa-devel] [very-RFC 0/8] TSN driver for the kernel Richard Cochran <richardcochran@gmail.com> - 2016-06-23 15:30 +0200
        Re: [very-RFC 0/8] TSN driver for the kernel Takashi Sakamoto <o-takashi@sakamocchi.jp> - 2016-06-15 05:30 +0200

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