From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rajesh Gumasta Subject: RE: [Patch v1 0/4] Add Nvidia Tegra GPC-DMA driver Date: Mon, 20 Jul 2020 10:00:27 +0000 Message-ID: References: <1595226856-19241-1-git-send-email-rgumasta@nvidia.com> <20200720092556.GA2141917@ulmo> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20200720092556.GA2141917@ulmo> Content-Language: en-US Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Thierry Reding Cc: Laxman Dewangan , Jonathan Hunter , "vkoul-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org" , "dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org" , "p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org" , "dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Krishna Yarlagadda List-Id: linux-tegra@vger.kernel.org > -----Original Message----- > From: Thierry Reding > Sent: Monday, July 20, 2020 2:56 PM > To: Rajesh Gumasta > Cc: Laxman Dewangan ; Jonathan Hunter > ; vkoul-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org; dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org; > p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org; dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux- > tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Krishna Yarlagadda > > Subject: Re: [Patch v1 0/4] Add Nvidia Tegra GPC-DMA driver >=20 > 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 >=20 > Hi Rajesh, >=20 > 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. >=20 I have used below parameter setting with kernel's built-in dmatest module t= o test mem to mem copy =20 cd /sys/module/dmatest/parameters=20 echo 50000 > iterations echo dma0chan20 > channel echo 1 > run > Thanks, > Thierry >=20 > > > > -- > > 2.7.4 > > Thanks Rajesh Gumasta