linux-kernel - Re: [PATCH v2 0/4] drm/nvdla: Add driver support for NVDLA

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Message-ID: <20220429033733.GA15753@chq-T47>
Date:   Fri, 29 Apr 2022 11:37:33 +0800
From:   Cai Huoqing <cai.huoqing@...ux.dev>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Mikko Perttunen <cyndis@...si.fi>,
        Thierry Reding <thierry.reding@...il.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
        Christian König <christian.koenig@....com>,
        linaro-mm-sig@...ts.linaro.org, dri-devel@...ts.freedesktop.org,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH v2 0/4] drm/nvdla: Add driver support for NVDLA

On 28 4月 22 17:35:56, Jon Hunter wrote:
> 
> On 28/04/2022 16:56, Mikko Perttunen wrote:
> > On 4/28/22 17:10, Thierry Reding wrote:
> > > On Tue, Apr 26, 2022 at 02:07:57PM +0800, Cai Huoqing wrote:
> > > > The NVIDIA Deep Learning Accelerator (NVDLA) is an open source IP
> > > > which is integrated into NVIDIA Jetson AGX Xavier,
> > > > so add driver support for this accelerator."
> > > 
> > > Hi,
> > > 
> > > nice to see this work going on. For subsequent revisions, can you please
> > > also Cc the Tegra mailing list (linux-tegra@...r.kernel.org) as well as
> > > the Tegra platform maintainers (that's Jon Hunter and myself). This will
> > > make sure that more people with an interest in this will see your work.
> > > Not everyone follows dri-devel, linaro-mm-sig or linux-media.
> > > 
> > > Thanks,
> > > Thierry
> > 
> >  From a quick glance it looks like this driver pokes DLA hardware
> > directly which is not the intended programming model on Tegra hardware
> > (there are Falcon microcontrollers that offload task scheduling and
> > synchronization from the CPU). The hardware is also behind the Host1x
> > bus so a simple platform device is not sufficient.
> > 
> > Was this driver developed against some platform with OpenDLA hardware
> > (i.e. not Tegra)?
> > 
> > If so, we'd need to verify if the hardware matches the hardware in
> > Tegra194. Also, this driver may not be ideal for Tegra platforms since
> > we would lack the hardware scheduling and synchronization facilities. It
> > is likely necessary to have separate drivers for OpenDLA and Tegra's DLA
> > integration.
> 
> 
> I believe that this is derived from the following github project ...
> 
> https://github.com/nvdla/sw
> 
Sure, based on https://github.com/nvdla/sw

The copyright retain in this driver,
like "Copyright (C) 2017-2018 NVIDIA CORPORATION"

Thanks
Cai
> Jon
> 
> -- 
> nvpublic