linux-kernel - Re: New subsystem for acceleration devices

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Message-ID: <CAPM=9tzWuoWAOjHJdJYVDRjoRq-4wpg2KGiCHjLLd+OfWEh5AQ@mail.gmail.com>
Date:   Thu, 4 Aug 2022 05:04:47 +1000
From:   Dave Airlie <airlied@...il.com>
To:     Oded Gabbay <oded.gabbay@...il.com>
Cc:     Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>,
        Jiho Chu <jiho.chu@...sung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: New subsystem for acceleration devices

On Sun, 31 Jul 2022 at 22:04, Oded Gabbay <oded.gabbay@...il.com> wrote:
>
> Hi,
> Greg and I talked a couple of months ago about preparing a new accel
> subsystem for compute/acceleration devices that are not GPUs and I
> think your drivers that you are now trying to upstream fit it as well.

We've had some submissions for not-GPUs to the drm subsystem recently.

Intel GNA, Intel VPU, NVDLA, rpmsg AI processor unit.

why is creating a new subsystem at this time necessary?

Are we just creating a subsystem to avoid the open source userspace
consumer rules? Or do we have some concrete reasoning behind it?

Dave.