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References: <20191025133007.11190-1-cychiang@chromium.org> <20191025133007.11190-3-cychiang@chromium.org>
 <20191025162232.GA23022@bogus>
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From:   Cheng-yi Chiang <cychiang@chromium.org>
Date:   Mon, 28 Oct 2019 10:32:24 +0800
Message-ID: <CAFv8NwKhe=CEuMCgeP1G0-Az4GEdMGPMMhvM3oY2=KmZNGrcRw@mail.gmail.com>
Subject: Re: [PATCH v8 2/6] ASoC: rockchip-max98090: Support usage with and
 without HDMI
To:     Rob Herring <robh@kernel.org>
Cc:     linux-kernel <linux-kernel@vger.kernel.org>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Jerome Brunet <jbrunet@baylibre.com>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Jonas Karlman <jonas@kwiboo.se>,
        Hans Verkuil <hverkuil@xs4all.nl>,
        Mark Brown <broonie@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Takashi Iwai <tiwai@suse.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Russell King <rmk+kernel@armlinux.org.uk>,
        Andrzej Hajda <a.hajda@samsung.com>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Heiko Stuebner <heiko@sntech.de>,
        Mark Rutland <mark.rutland@arm.com>,
        Doug Anderson <dianders@chromium.org>,
        Dylan Reid <dgreid@chromium.org>,
        Tzung-Bi Shih <tzungbi@chromium.org>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@alsa-project.org>, dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org
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On Sat, Oct 26, 2019 at 12:22 AM Rob Herring <robh@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@chromium.org>
> > ---
> >  .../bindings/sound/rockchip-max98090.txt      | 38 +++++++++++++++++--
> >  1 file changed, 35 insertions(+), 3 deletions(-)