linux-kernel - Re: [PATCH v10 03/10] drm/connector: implement generic HDMI audio helpers

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Message-ID: <CAFBinCBstfDa966+5wKLFdQNhnjW+d5Mpj=x3BDY+R5nHNnKLQ@mail.gmail.com>
Date: Sun, 5 Jan 2025 17:25:43 +0100
From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Laurent.pinchart@...asonboard.com, airlied@...il.com, 
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Subject: Re: [PATCH v10 03/10] drm/connector: implement generic HDMI audio helpers

On Fri, Jan 3, 2025 at 1:37 PM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> On Tue, Dec 31, 2024 at 07:49:40PM +0100, Martin Blumenstingl wrote:
> > On Tue, Dec 31, 2024 at 3:34 AM Dmitry Baryshkov
> > <dmitry.baryshkov@...aro.org> wrote:
> > [...]
> > > > I checked all instances of struct hdmi_codec_ops in v6.13-rc3 and it
> > > > seems that there is only a single driver which uses the .prepare
> > > > callback (drivers/gpu/drm/vc4/vc4_hdmi.c). All other drivers seem to
> > > > implement .hw_params instead.
> > >
> > > Yes. However .hw_params don't have access to the infoframe contents, so
> > > I had to settle on implementing .prepare.
> > While debugging I noticed something unrelated to my problem:
> > hdmi_codec_spdif_dai_ops does not implement .prepare().
> > FYI just in case someone wants to use your patches and feed the
> > hdmi-codec with SPDIF instead of I2S.
>
> Could you please send submit a patch to the hdmi-codec driver?
Sure, see [0]


[0] https://lore.kernel.org/linux-sound/20250105162407.30870-1-martin.blumenstingl@googlemail.com/T/#u