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Wed, 25 Feb 2026 13:10:08 -0800 (PST) Date: Wed, 25 Feb 2026 22:10:07 +0100 From: Alexander Gordeev To: Vinod Koul Cc: Frank Li , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 0/2] dma: DMA slave device bringup tool Message-ID: References: <20260221132248.17721-1-a.gordeev.box@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Feb 25, 2026 at 03:07:06PM +0530, Vinod Koul wrote: Hi Vinod, Frank, > > I am not sure if it can work for general dma engine because it slave setting > > is tight coupling with FIFO settings and timing, some periphal require > > start dma firstly, then enable DMA. some perphial require enable DMA first > > then queue dma transfer. > > > > burst len is also related with FIFO 's watermark settings. > > Correct! > > I like the idea but it is not practical. Every dmaengine is tied to the > peripheral for setting up the transfer. It is not a memcpy! How did you > test it, which controller was used ..? I likely missing something, but how this differs from dmatest, which also lacks any controller-specific setup? I tested it on Avalon-MM Interface on Arria 10 FPGA and found it super- useful - thus an attempt to share. > ~Vinod Thanks!