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([2401:4900:1b90:3a2c:517f:a983:9a1b:5289]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-826dd86c5b6sm9780044b3a.32.2026.02.24.01.30.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Feb 2026 01:30:53 -0800 (PST) From: Rahul Navale To: Folker Schwesinger Cc: Rahul Navale , dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, vkoul@kernel.org, Frank.Li@kernel.org, michal.simek@amd.com, suraj.gupta2@amd.com, thomas.gessler@brueckmann-gmbh.de, radhey.shyam.pandey@amd.com, tomi.valkeinen@ideasonboard.com, rahulnavale04@gmail.com Subject: Re: [RFC PATCH] dmaengine: xilinx_dma: Fix per-channel direction reporting via device_caps Date: Tue, 24 Feb 2026 15:00:39 +0530 Message-ID: <20260224093041.38699-1-rahulnavale04@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260224_013055_814006_42BCFA52 X-CRM114-Status: UNSURE ( 8.57 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Rahul Navale >this is an important bit of information. Could you verify that your >customized driver uses dmaengine's dma_get_slave_caps() to obtain >channel capabilities and that the newly introduced >xilinx_dma_device_caps() is actually called? Hi Folker, Thanks for the clarification — I misunderstood about custom drivers. I have confirmed that we are using the upstream xilinx DMA driver (drivers/dma/xilinx/xilinx_dma.c) and using AXI DMA for audio. We use separate fixed-direction channels: MM2S for playback (DMA_MEM_TO_DEV) and S2MM for capture (DMA_DEV_TO_MEM), referenced via device tree. Thanks, Rahul Navale