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([2401:4900:190e:b060:a09b:ad6e:b90e:b5ba]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ae83e575f3sm138471255ad.8.2026.03.09.00.28.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Mar 2026 00:28:34 -0700 (PDT) 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, marex@nabladev.com, marex@denx.de Subject: Re: [RFC PATCH] dmaengine: xilinx_dma: Fix per-channel direction reporting via device_caps Date: Mon, 9 Mar 2026 12:58:21 +0530 Message-ID: <20260309072822.5016-1-rahulnavale04@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260309_002836_249500_FD8FA5E4 X-CRM114-Status: UNSURE ( 7.52 ) 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 >Please undo the latest Xilinx DMA patch I sent. >To get some more data, could you apply the following patch (keep RFC >patch and debug stuff) and rerun with 7e01511443c3 a) applied and b) >reverted and post logs for both cases: I have applied provided patch (with kept RFC patch and debug stuff) and with 7e01511443c3 applied. logs: root@pdm3:~# dmesg | grep xilinx_dma_device_caps [ 0.285057] xilinx_dma_device_caps: caps->directions = 0x00000001 [ 0.285060] xilinx_dma_device_caps: caps->directions = 0x00000001 [ 0.285759] xilinx_dma_device_caps: caps->directions = 0x00000002 [ 0.285763] xilinx_dma_device_caps: caps->directions = 0x00000002 [ 7.535143] xilinx_dma_device_caps: caps->directions = 0x00000001 [ 7.535147] xilinx_dma_device_caps: caps->directions = 0x00000001 root@pdm3:~# dmesg | grep ptr_res root@pdm3:~# aplay closetoyou.wav Playing WAVE 'closetoyou.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo ^CAborted by signal Interrupt... aplay: pcm_write:2178: write error: Interrupted system call root@pdm3:~# root@pdm3:~# dmesg | grep ptr_res [ 198.997591] ptr_res: ptr = 0x00000000 [ 199.002885] ptr_res: ptr = 0x00000000 [ 199.002900] ptr_res: ptr = 0x00000000 [ 199.002925] ptr_res: ptr = 0x00000000 [ 199.002946] ptr_res: ptr = 0x00000000 [ 199.117775] ptr_res: ptr = 0x00000000 [ 199.117818] ptr_res: ptr = 0x00000000 [ 199.117839] ptr_res: ptr = 0x00000000 [ 199.242766] ptr_res: ptr = 0x00000000 [ 199.242800] ptr_res: ptr = 0x00000000 [ 199.242820] ptr_res: ptr = 0x00000000 Also I have applied provided patch (with kept RFC patch and debug stuff) and with 7e01511443c3 reverted. logs: root@pdm3:~# dmesg | grep xilinx_dma_device_caps root@pdm3:~# dmesg | grep ptr_res root@pdm3:~# aplay closetoyou.wav Playing WAVE 'closetoyou.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo ^CAborted by signal Interrupt... aplay: pcm_write:2178: write error: Interrupted system call root@pdm3:~# root@pdm3:~# dmesg | grep ptr_res [ 60.480754] ptr_res_no: ptr = 0x00000000 [ 60.486058] ptr_res_no: ptr = 0x00000000 [ 60.486070] ptr_res_no: ptr = 0x00000000 [ 60.486094] ptr_res_no: ptr = 0x00000000 [ 60.486113] ptr_res_no: ptr = 0x00000000 [ 60.600877] ptr_res_no: ptr = 0x00001770 [ 60.600920] ptr_res_no: ptr = 0x00001770 [ 60.600939] ptr_res_no: ptr = 0x00001770 [ 60.600948] ptr_res_no: ptr = 0x00001770 [ 60.600968] ptr_res_no: ptr = 0x00001770 [ 60.602739] ptr_res_no: ptr = 0x00001770 [ 60.602750] ptr_res_no: ptr = 0x00001770 [ 60.725869] ptr_res_no: ptr = 0x00002ee0 [ 60.725904] ptr_res_no: ptr = 0x00002ee0 [ 60.725921] ptr_res_no: ptr = 0x00002ee0 [ 60.725931] ptr_res_no: ptr = 0x00002ee0 [ 60.725949] ptr_res_no: ptr = 0x00002ee0 [ 60.727667] ptr_res_no: ptr = 0x00002ee0 [ 60.727677] ptr_res_no: ptr = 0x00002ee0 [ 60.850877] ptr_res_no: ptr = 0x00000000 [ 60.850939] ptr_res_no: ptr = 0x00000000 [ 60.850960] ptr_res_no: ptr = 0x00000000 [ 60.850969] ptr_res_no: ptr = 0x00000000 [ 60.851000] ptr_res_no: ptr = 0x00000000 [ 60.852750] ptr_res_no: ptr = 0x00000000 [ 60.852760] ptr_res_no: ptr = 0x00000000 [ 60.975869] ptr_res_no: ptr = 0x00001770 [ 60.975905] ptr_res_no: ptr = 0x00001770 [ 60.975923] ptr_res_no: ptr = 0x00001770 ... ...