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

Cai Huoqing
2022-04-29T03:38:04Z

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@vger.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