linux-kernel - Re: [Patch v1 0/4] Add Nvidia Tegra GPC-DMA driver

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Date:   Mon, 20 Jul 2020 11:25:56 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Rajesh Gumasta <rgumasta@...dia.com>
Cc:     ldewangan@...dia.com, jonathanh@...dia.com, vkoul@...nel.org,
        dan.j.williams@...el.com, p.zabel@...gutronix.de,
        dmaengine@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, kyarlagadda@...dia.com
Subject: Re: [Patch v1 0/4] Add Nvidia Tegra GPC-DMA driver

On Mon, Jul 20, 2020 at 12:04:12PM +0530, Rajesh Gumasta wrote:
> Add support for Nvida Tegra general purpose DMA driver for
> Tegra186 and Tegra194 platform.
> 
> Patch 1: Add dt-binding document for Tegra GPCDMA driver
> Patch 2: Add Tegra GPCDMA driver
> Patch 3: Enable Tegra GPCDMA as module
> Patch 4: Add GPCDMA DT node for Tegra186 and Tegra194
> 
> Rajesh Gumasta (4):
>   dt-bindings: dma: Add DT binding document
>   dma: tegra: Adding Tegra GPC DMA controller driver
>   arm64: configs: enable tegra gpc dma
>   arm64: tegra: Add GPCDMA node in dt
> 
>  .../bindings/dma/nvidia,tegra-gpc-dma.yaml         |   99 ++
>  arch/arm64/boot/dts/nvidia/tegra186-p3310.dtsi     |    4 +
>  arch/arm64/boot/dts/nvidia/tegra186.dtsi           |   46 +
>  arch/arm64/boot/dts/nvidia/tegra194.dtsi           |   44 +
>  arch/arm64/configs/defconfig                       |    1 +
>  drivers/dma/Kconfig                                |   12 +
>  drivers/dma/Makefile                               |    1 +
>  drivers/dma/tegra-gpc-dma.c                        | 1512 ++++++++++++++++++++
>  8 files changed, 1719 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dma/nvidia,tegra-gpc-dma.yaml
>  create mode 100644 drivers/dma/tegra-gpc-dma.c

Hi Rajesh,

can you provide instructions on how to test that this driver does what
it's supposed to? I could probably figure out how to run this with the
kernel's built-in dmatest module, but if you could provide a set of
parameters that you've used or other instructions on how to validate
this it would greatly help.

Thanks,
Thierry

> 
> -- 
> 2.7.4
> 

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