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Thu, 29 Jan 2026 01:53:46 -0800 (PST) X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 References: <20260128071853.2602784-1-shengjiu.wang@nxp.com> <20260128071853.2602784-3-shengjiu.wang@nxp.com> <36309f30-8b83-4eaa-842e-c663edd8a439@oss.nxp.com> In-Reply-To: <36309f30-8b83-4eaa-842e-c663edd8a439@oss.nxp.com> From: Shengjiu Wang Date: Thu, 29 Jan 2026 17:53:34 +0800 X-Gm-Features: AZwV_QhJaxBDlnFwwTXJVH6oDtpo891knd-s55tPdoqjkrrPNspPNZy-5Dfzq3s Message-ID: Subject: Re: [PATCH 2/3] ASoC: fsl_asrc: Add support for i.MX952 platform To: Daniel Baluta Cc: Shengjiu Wang , lgirdwood@gmail.com, broonie@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-sound@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Xiubo.Lee@gmail.com, nicoleotsuka@gmail.com, perex@perex.cz, tiwai@suse.com, linuxppc-dev@lists.ozlabs.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Jan 29, 2026 at 5:17=E2=80=AFPM Daniel Baluta wrote: > > On 1/28/26 09:18, Shengjiu Wang wrote: > > Add a compatible string and clock mapping table to support ASRC on the > i.MX952 platform. > > There is a limitation on i.MX952 that dma request is not cleared at the > end of conversion with dma slave mode. Which causes sample is dropped > from the input fifo on the second time if dma is triggered before the > client device and EDMA may copy wrong data from output fifo as the output > fifo is not ready in the beginning. > > So need to trigger asrc before dma on i.MX952, and add delay to wait > output data is generated then start the EDMA for output, otherwise the > m2m function has noise issues. > > Signed-off-by: Shengjiu Wang > > This patch does more than one logical change. > > I would split in two patches: > > - 1) introduce functionality to start ASRC before DMA. > > - 2) add imx952 support including clk_map and introduce fsl_asrc_imx952_d= ata Ok, will separate them. best regards Shengjiu Wang > > Thanks, > > Daniel. > >