linux-kernel - Re: [PATCH v2 0/5] Add Toshiba Visconti DNN image processing accelerator driver

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Message-ID: <YuJNDxglPxqa3hnf@kroah.com>
Date:   Thu, 28 Jul 2022 10:47:11 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     yuji2.ishikawa@...hiba.co.jp
Cc:     robh+dt@...nel.org, hverkuil@...all.nl,
        nobuhiro1.iwamatsu@...hiba.co.jp, corbet@....net,
        sumit.semwal@...aro.org, christian.koenig@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v2 0/5] Add Toshiba Visconti DNN image processing
 accelerator driver

On Tue, Jul 26, 2022 at 06:09:50AM +0000, yuji2.ishikawa@...hiba.co.jp wrote:
> Hi Greg
> 
> Thank you for your comments.
> 
> > -----Original Message-----
> > From: Greg KH <gregkh@...uxfoundation.org>
> > Sent: Monday, July 25, 2022 9:47 PM
> > To: ishikawa yuji(石川 悠司 ○ＲＤＣ□ＡＩＴＣ○ＥＡ開)
> > <yuji2.ishikawa@...hiba.co.jp>
> > Cc: Rob Herring <robh+dt@...nel.org>; Hans Verkuil <hverkuil@...all.nl>;
> > iwamatsu nobuhiro(岩松 信洋 □ＳＷＣ◯ＡＣＴ)
> > <nobuhiro1.iwamatsu@...hiba.co.jp>; Jonathan Corbet <corbet@....net>;
> > Sumit Semwal <sumit.semwal@...aro.org>; Christian König
> > <christian.koenig@....com>; linux-arm-kernel@...ts.infradead.org;
> > linux-kernel@...r.kernel.org; linux-media@...r.kernel.org;
> > dri-devel@...ts.freedesktop.org; linaro-mm-sig@...ts.linaro.org
> > Subject: Re: [PATCH v2 0/5] Add Toshiba Visconti DNN image processing
> > accelerator driver
> > 
> > On Fri, Jul 22, 2022 at 05:28:53PM +0900, Yuji Ishikawa wrote:
> > > This series is the DNN image processing accelerator driver for Toshiba's ARM
> > SoC, Visconti[0].
> > > This provides DT binding documentation, device driver, MAINTAINER files
> > and documents.
> > >
> > > Best regards,
> > > Yuji
> > >
> > > [0]:
> > >
> > https://toshiba.semicon-storage.com/ap-en/semiconductor/product/image-
> > > recognition-processors-visconti.html
> > >
> > > dt-bindings: soc: visconti: Add Toshiba Visconti DNN image processing
> > accelerator bindings
> > >   v1 -> v2:
> > >     - No update
> > >
> > > soc: visconti: Add Toshiba Visconti image processing accelerator common
> > source
> > >   v1 -> v2:
> > >     - checked with checkpatch.pl --strict
> > >
> > > soc: visconti: Add Toshiba Visconti DNN image processing accelerator
> > >   v1 -> v2:
> > >     - checked with checkpatch.pl --strict
> > >     - removed unused code
> > >
> > > MAINTAINERS: Add entries for Toshiba Visconti DNN image processing
> > >   v1 -> v2:
> > >     - No update
> > >
> > > Documentation: driver-api: visconti: add a description of DNN driver.
> > >   v1 -> v2:
> > >     - newly added documents
> > >
> > > Yuji Ishikawa (5):
> > >   dt-bindings: soc: visconti: Add Toshiba Visconti DNN image processing
> > >     accelerator bindings
> > >   soc: visconti: Add Toshiba Visconti image processing accelerator
> > >     common source
> > >   soc: visconti: Add Toshiba Visconti DNN image processing accelerator
> > >   MAINTAINERS: Add entries for Toshiba Visconti DNN image processing
> > >     accelerator
> > >   Documentation: driver-api: visconti: add a description of DNN driver.
> > >
> > >  .../soc/visconti/toshiba,visconti-dnn.yaml    |  54 ++
> > >  Documentation/driver-api/visconti/common.rst  | 115 ++++
> > >  Documentation/driver-api/visconti/dnn.rst     | 394 +++++++++++++
> > >  MAINTAINERS                                   |   2 +
> > >  drivers/soc/Kconfig                           |   1 +
> > >  drivers/soc/Makefile                          |   1 +
> > >  drivers/soc/visconti/Kconfig                  |   7 +
> > >  drivers/soc/visconti/Makefile                 |   8 +
> > >  drivers/soc/visconti/dnn/Makefile             |   6 +
> > >  drivers/soc/visconti/dnn/dnn.c                | 523
> > ++++++++++++++++++
> > >  drivers/soc/visconti/dnn/hwd_dnn.c            | 183 ++++++
> > >  drivers/soc/visconti/dnn/hwd_dnn.h            |  68 +++
> > >  drivers/soc/visconti/dnn/hwd_dnn_reg.h        | 228 ++++++++
> > >  drivers/soc/visconti/ipa_common.c             |  55 ++
> > >  drivers/soc/visconti/ipa_common.h             |  18 +
> > >  drivers/soc/visconti/uapi/dnn.h               |  77 +++
> > >  drivers/soc/visconti/uapi/ipa.h               |  90 +++
> > 
> > Why is this in drivers/soc/?
> 
> Actually, I'm not sure where his module should live in.
> The directory drivers/soc were chosen just because the driver is specific to Visconti SoC.
> Is it better to move the driver to another directory such as drivers/misc ?

Yes please start out in drivers/misc/ unless we find a better place for
it.

thanks,

greg k-h