Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver

From	Russell King - ARM Linux <linux@arm.linux.org.uk>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver
Date	2015-10-06 21:00 +0200
Message-ID	<qgFCV-6fq-3@gated-at.bofh.it> (permalink)
References	<pVeR3-3EB-9@gated-at.bofh.it> <pVf0J-3Qj-17@gated-at.bofh.it> <qgEQy-5kz-11@gated-at.bofh.it> <qgF0d-5vZ-3@gated-at.bofh.it> <qgFtg-648-7@gated-at.bofh.it>
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On Tue, Oct 06, 2015 at 03:45:32PM -0300, Fabio Estevam wrote:
> On Tue, Oct 6, 2015 at 3:18 PM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
> 
> > Sorry, I've been out for most of the day.  There's no DT patches required.
> >
> > The dw_hdmi bridge driver creates its own platform device for the audio,
> > which should then bind to the dw_hdmi-ahb-audio driver using normal Linux
> > methods.
> >
> > I don't know what's wrong with your setup, for me, it just works:
> >
> > [    1.358829] dwhdmi-imx 120000.hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1
> > [    1.377173] imx-drm display-subsystem: bound 120000.hdmi (ops dw_hdmi_imx_ops)
> > ...
> > [    2.851343] ALSA device list:
> > [    2.857364]   #0: DW-HDMI rev 0x0a, irq 21
> >
> > as it always has done for me.  There's nothing special about it.
> 
> Great, got it to probe now:
> 
> [    7.454760] ALSA device list:
> [    7.457764]   #0: DW-HDMI rev 0x0a, irq 19
> [    7.461990]   #1: wm8962-audio
> 
> There was a conflict and I resolved incorrectly here. Will try to play
> a wav file via aplay now.

Make sure you have the ALSA config file, as alsalib won't get on
with dw-hdmi only accepting 24-bit audio without this.  A copy is
attached.  It also tells ALSA how to deal with multi-channel audio
as well.

-- 
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

Thread

Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Fabio Estevam <festevam@gmail.com> - 2015-10-06 20:10 +0200
  Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-10-06 20:20 +0200
    Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Fabio Estevam <festevam@gmail.com> - 2015-10-06 20:50 +0200
      Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-10-06 21:00 +0200
        Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Fabio Estevam <festevam@gmail.com> - 2015-10-06 22:30 +0200
          Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-10-09 18:10 +0200
            Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Fabio Estevam <festevam@gmail.com> - 2015-10-09 18:10 +0200
              Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-10-09 18:20 +0200

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