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Wed, 14 Sep 2022 10:52:36 +0000 From: Chancel Liu To: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org, shengjiu.wang@gmail.com, shengjiu.wang@nxp.com, Xiubo.Lee@gmail.com, festevam@gmail.com, nicoleotsuka@gmail.com, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 0/7] Create a new sound card to access MICFIL based on rpmsg channel Date: Wed, 14 Sep 2022 18:51:38 +0800 Message-Id: <20220914105145.2543646-1-chancel.liu@nxp.com> X-Mailer: git-send-email 2.25.1 X-ClientProxiedBy: SI1PR02CA0017.apcprd02.prod.outlook.com (2603:1096:4:1f4::10) To VI1PR04MB4222.eurprd04.prod.outlook.com (2603:10a6:803:46::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: VI1PR04MB4222:EE_|DU0PR04MB9466:EE_ X-MS-Office365-Filtering-Correlation-Id: 30fb2649-5d92-4f27-4d3c-08da963f3c4a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The sound card works under this mechanism Cortex-A core tells the Cortex-M core the format, rate, channel, .etc configuration of the PCM parameters and Cortex-M controls real hardware devices such as SAI and DMA. From the view of Linux side, the sound card is bound to a rpmsg channel through which it can access SAI. Here these patches are introduced to create a new virtual sound card to access MICFIL based on a new created rpmsg channel. It's easy to create a new rpmsg channel for MICFIL through rpmsg name service announcment. Also the other ASoC components bound to this rpmsg MICFIL sound card will be registered with these patches. If other sound cards using different hardware devices needs to be created over rpmsg in the future, these patches can be referred. changes in v2: - Rename property in bindings file according to Krzysztof's comments - Update codes and comments according to Shengjiu's comments Chancel Liu (7): ASoC: dt-bindings: fsl_rpmsg: Add a property to assign the rpmsg channel ASoC: imx-audio-rpmsg: Create rpmsg channel for MICFIL ASoC: imx-pcm-rpmsg: Register different platform drivers ASoC: imx-pcm-rpmsg: Multi-channel support for sound card based on rpmsg ASoC: fsl_rpmsg: Register different ASoC machine devices ASoC: fsl_rpmsg: Multi-channel support in CPU DAI driver ASoC: imx-rpmsg: Assign platform driver used by machine driver to link with .../devicetree/bindings/sound/fsl,rpmsg.yaml | 37 ++++++++++++++++++- sound/soc/fsl/fsl_rpmsg.c | 6 +-- sound/soc/fsl/imx-audio-rpmsg.c | 3 +- sound/soc/fsl/imx-pcm-rpmsg.c | 10 +++-- sound/soc/fsl/imx-rpmsg.c | 6 ++- 5 files changed, 52 insertions(+), 10 deletions(-) --- 2.25.1