> -----Original Message----- > From: Thierry Reding <thierry.reding@xxxxxxxxx> > Sent: Monday, July 20, 2020 2:56 PM > To: Rajesh Gumasta <rgumasta@xxxxxxxxxx> > Cc: Laxman Dewangan <ldewangan@xxxxxxxxxx>; Jonathan Hunter > <jonathanh@xxxxxxxxxx>; vkoul@xxxxxxxxxx; dan.j.williams@xxxxxxxxx; > p.zabel@xxxxxxxxxxxxxx; dmaengine@xxxxxxxxxxxxxxx; linux- > tegra@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Krishna Yarlagadda > <kyarlagadda@xxxxxxxxxx> > 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. > I have used below parameter setting with kernel's built-in dmatest module to test mem to mem copy cd /sys/module/dmatest/parameters echo 50000 > iterations echo dma0chan20 > channel echo 1 > run > Thanks, > Thierry > > > > > -- > > 2.7.4 > > Thanks Rajesh Gumasta
