From: Shengjiu Wang <shengjiu.wang@gmail.com>
To: Rob Herring <robh@kernel.org>
Cc: Shengjiu Wang <shengjiu.wang@nxp.com>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
Linux-ALSA <alsa-devel@alsa-project.org>,
Timur Tabi <timur@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Xiubo Li <Xiubo.Lee@gmail.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Takashi Iwai <tiwai@suse.com>,
Nicolin Chen <nicoleotsuka@gmail.com>,
Mark Brown <broonie@kernel.org>,
Fabio Estevam <festevam@gmail.com>
Subject: Re: [PATCH v2 7/7] ASoC: dt-bindings: imx-rpmsg: Add binding doc for rpmsg machine driver
Date: Fri, 5 Mar 2021 10:55:25 +0800 [thread overview]
Message-ID: <CAA+D8AOP9L7eNHFMYrTscz0tPKMqU8Y0H5BtqyURmduhHgvGtw@mail.gmail.com> (raw)
In-Reply-To: <CAL_JsqK1uc82hfdE4yj0ye-D6vygiqWkDVW96NOb-8kEFVqHMg@mail.gmail.com>
Hi
On Fri, Mar 5, 2021 at 4:05 AM Rob Herring <robh@kernel.org> wrote:
>
> On Thu, Feb 18, 2021 at 1:23 AM Shengjiu Wang <shengjiu.wang@gmail.com> wrote:
> >
> > On Thu, Feb 11, 2021 at 6:18 AM Rob Herring <robh@kernel.org> wrote:
> > >
> > > On Sun, Feb 07, 2021 at 06:23:55PM +0800, Shengjiu Wang wrote:
> > > > Imx-rpmsg is a new added machine driver for supporting audio on Cortex-M
> > > > core. The Cortex-M core will control the audio interface, DMA and audio
> > > > codec, setup the pipeline, the audio driver on Cortex-A core side is just
> > > > to communitcate with M core, it is a virtual sound card and don't touch
> > > > the hardware.
> > >
> > > I don't understand why there are 2 nodes for this other than you happen
> > > to want to split this into 2 Linux drivers. It's 1 h/w thing.
> >
> > This one is for the sound card machine driver. Another one is
> > for the sound card cpu dai driver. so there are 2 nodes.
>
> You are explaining this to me in terms of drivers. Explain it in terms
> of h/w blocks.
>
Yes, there is only 1 h/w block, which is (MU) message unit
As the sound card needs a cpu dai node and sound card node,
so from the driver's perspective, I use two nodes.
Seems It is hard to only use one node for my case.
or do you have any suggestions?
Best regards
Wang shengjiu
WARNING: multiple messages have this Message-ID (diff)
From: Shengjiu Wang <shengjiu.wang@gmail.com>
To: Rob Herring <robh@kernel.org>
Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
Linux-ALSA <alsa-devel@alsa-project.org>,
Timur Tabi <timur@kernel.org>, Xiubo Li <Xiubo.Lee@gmail.com>,
Fabio Estevam <festevam@gmail.com>,
Shengjiu Wang <shengjiu.wang@nxp.com>,
Takashi Iwai <tiwai@suse.com>,
Liam Girdwood <lgirdwood@gmail.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Nicolin Chen <nicoleotsuka@gmail.com>,
Mark Brown <broonie@kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v2 7/7] ASoC: dt-bindings: imx-rpmsg: Add binding doc for rpmsg machine driver
Date: Fri, 5 Mar 2021 10:55:25 +0800 [thread overview]
Message-ID: <CAA+D8AOP9L7eNHFMYrTscz0tPKMqU8Y0H5BtqyURmduhHgvGtw@mail.gmail.com> (raw)
In-Reply-To: <CAL_JsqK1uc82hfdE4yj0ye-D6vygiqWkDVW96NOb-8kEFVqHMg@mail.gmail.com>
Hi
On Fri, Mar 5, 2021 at 4:05 AM Rob Herring <robh@kernel.org> wrote:
>
> On Thu, Feb 18, 2021 at 1:23 AM Shengjiu Wang <shengjiu.wang@gmail.com> wrote:
> >
> > On Thu, Feb 11, 2021 at 6:18 AM Rob Herring <robh@kernel.org> wrote:
> > >
> > > On Sun, Feb 07, 2021 at 06:23:55PM +0800, Shengjiu Wang wrote:
> > > > Imx-rpmsg is a new added machine driver for supporting audio on Cortex-M
> > > > core. The Cortex-M core will control the audio interface, DMA and audio
> > > > codec, setup the pipeline, the audio driver on Cortex-A core side is just
> > > > to communitcate with M core, it is a virtual sound card and don't touch
> > > > the hardware.
> > >
> > > I don't understand why there are 2 nodes for this other than you happen
> > > to want to split this into 2 Linux drivers. It's 1 h/w thing.
> >
> > This one is for the sound card machine driver. Another one is
> > for the sound card cpu dai driver. so there are 2 nodes.
>
> You are explaining this to me in terms of drivers. Explain it in terms
> of h/w blocks.
>
Yes, there is only 1 h/w block, which is (MU) message unit
As the sound card needs a cpu dai node and sound card node,
so from the driver's perspective, I use two nodes.
Seems It is hard to only use one node for my case.
or do you have any suggestions?
Best regards
Wang shengjiu
next prev parent reply other threads:[~2021-03-05 2:55 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-07 10:23 [PATCH v2 0/7] Add audio driver base on rpmsg on i.MX platform Shengjiu Wang
2021-02-07 10:23 ` [PATCH v2 1/7] ASoC: soc-component: Add snd_soc_pcm_component_ack Shengjiu Wang
2021-02-07 10:23 ` [PATCH v2 2/7] ASoC: fsl_rpmsg: Add CPU DAI driver for audio base on rpmsg Shengjiu Wang
2021-02-08 11:51 ` Mark Brown
2021-02-08 11:51 ` Mark Brown
2021-02-08 11:51 ` Mark Brown
2021-02-09 9:16 ` Shengjiu Wang
2021-02-09 9:16 ` Shengjiu Wang
2021-02-09 22:29 ` Mark Brown
2021-02-09 22:29 ` Mark Brown
2021-02-10 6:35 ` Shengjiu Wang
2021-02-10 6:35 ` Shengjiu Wang
2021-02-10 15:38 ` Mark Brown
2021-02-10 15:38 ` Mark Brown
2021-02-18 7:57 ` Shengjiu Wang
2021-02-18 7:57 ` Shengjiu Wang
2021-02-22 13:46 ` Mark Brown
2021-02-22 13:46 ` Mark Brown
2021-02-07 10:23 ` [PATCH v2 3/7] ASoC: dt-bindings: fsl_rpmsg: Add binding doc for rpmsg cpu dai driver Shengjiu Wang
2021-02-10 22:12 ` Rob Herring
2021-02-10 22:12 ` Rob Herring
2021-02-10 22:12 ` Rob Herring
2021-02-18 7:21 ` Shengjiu Wang
2021-02-18 7:21 ` Shengjiu Wang
2021-02-25 3:10 ` Fabio Estevam
2021-02-25 3:10 ` Fabio Estevam
2021-02-07 10:23 ` [PATCH v2 4/7] ASoC: imx-audio-rpmsg: Add rpmsg_driver for audio channel Shengjiu Wang
2021-02-07 10:23 ` [PATCH v2 5/7] ASoC: imx-pcm-rpmsg: Add platform driver for audio base on rpmsg Shengjiu Wang
2021-02-07 10:23 ` [PATCH v2 6/7] ASoC: imx-rpmsg: Add machine " Shengjiu Wang
2021-02-07 10:23 ` [PATCH v2 7/7] ASoC: dt-bindings: imx-rpmsg: Add binding doc for rpmsg machine driver Shengjiu Wang
2021-02-10 22:17 ` Rob Herring
2021-02-10 22:17 ` Rob Herring
2021-02-10 22:17 ` Rob Herring
2021-02-18 7:23 ` Shengjiu Wang
2021-02-18 7:23 ` Shengjiu Wang
2021-03-04 20:04 ` Rob Herring
2021-03-04 20:04 ` Rob Herring
2021-03-05 2:55 ` Shengjiu Wang [this message]
2021-03-05 2:55 ` Shengjiu Wang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAA+D8AOP9L7eNHFMYrTscz0tPKMqU8Y0H5BtqyURmduhHgvGtw@mail.gmail.com \
--to=shengjiu.wang@gmail.com \
--cc=Xiubo.Lee@gmail.com \
--cc=alsa-devel@alsa-project.org \
--cc=broonie@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=festevam@gmail.com \
--cc=lgirdwood@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=nicoleotsuka@gmail.com \
--cc=robh@kernel.org \
--cc=shengjiu.wang@nxp.com \
--cc=timur@kernel.org \
--cc=tiwai@suse.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.