linux-kernel - Re: [PATCH] drm: adv7511_audio: Add .get_dai_id callback to map port number to dai id

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Date:   Tue, 13 Jun 2017 15:01:27 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     lkml <linux-kernel@...r.kernel.org>
Cc:     John Stultz <john.stultz@...aro.org>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Archit Taneja <architt@...eaurora.org>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH] drm: adv7511_audio: Add .get_dai_id callback to map port
 number to dai id

On Tue, Jun 13, 2017 at 2:59 PM, John Stultz <john.stultz@...aro.org> wrote:
> ALSA SoC needs to know connected DAI ID for probing. Using
> the new audio-card-graph approach, ports/endpoints are used
> to describe how the links are connected. Unfortunately, since
> ports/endpoints are used as well for video linkages, there
> are some issues mixing the port ids to the two (video and
> audio) namespaces.
>
> To solve this issue, this patch adds new .get_dai_id callback
> on hdmi_codec_ops.
>
> The will assume that HDMI audio out will be connected to
> reg = <2>. This will then be remapped to the ALSA SoC side will
> as DAI 0. Allowing the adv7511's hdmi audio support to be used
> with the audio-card-graph.
>
> Credit to Kuninori Morimoto who's patch to dw-hdmi-i2s-audio.c
> was what this was mostly copy-pasted from.

Forgot to note this has dependencies on patches in the ASoC tree in
-next, so it probably should go in via that tree.

thanks
-john