[alsa-devel] [PATCH v8 2/6] ASoC: rockchip-max98090: Support usage with and without HDMI

[Cheng-yi Chiang]

On Sat, Oct 26, 2019 at 12:22 AM Rob Herring <robh at kernel.org> wrote:
>
> On Fri, Oct 25, 2019 at 09:30:03PM +0800, Cheng-Yi Chiang wrote:
> > There will be multiple boards sharing this machine driver.
> > Use compatible string to specify the use case.
> >
> > "rockchip,rockchip-audio-max98090" for max98090-only.
> > "rockchip,rockchip-audio-hdmi" for HDMI-only
> > "rockchip,rockchip-audio-max98090-hdmi" for max98090 plus
> >
> > Move these properties to optional because they are not needed for
> > HDMI-only use case.
> > "rockchip,audio-codec": The phandle of the MAX98090 audio codec
> > "rockchip,headset-codec": The phandle of Ext chip for jack detection
> >
> > The machine driver change will add support for HDMI codec in
> > rockchip-max98090.
> > Add one optional property "rockchip,hdmi-codec" to let user specify HDMI
> > device node in DTS so machine driver can find hdmi-codec device node for
> > codec DAI.
>
> Why not just use the presence of rockchip,hdmi-codec to enable HDMI or
> not. Maybe you still add rockchip,rockchip-audio-hdmi for HDMI only.
>
> Really, the same should have been done for which codec is used too, but
> I guess someone wanted 2 machine drivers.

Hi Rob,
Thanks for the quick reply.
I can make change in machine driver so that
- The presence of rockchip,audio-codec enable max98090
- The presence of rockchip,hdmi-codec enable HDMI.

With that, we don't need the three properties added in this patch:
"rockchip,rockchip-audio-max98090" for max98090-only.
"rockchip,rockchip-audio-hdmi" for HDMI-only
"rockchip,rockchip-audio-max98090-hdmi" for max98090 plus HDMI.

I will post an update soon. Thanks!

>
>
> >
> > Signed-off-by: Cheng-Yi Chiang <cychiang at chromium.org>
> > ---
> >  .../bindings/sound/rockchip-max98090.txt      | 38 +++++++++++++++++--
> >  1 file changed, 35 insertions(+), 3 deletions(-)