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Mon, 29 Aug 2022 07:55:53 +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@nxp.com, Xiubo.Lee@gmail.com, festevam@gmail.com, nicoleotsuka@gmail.com, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 0/5] Create a new sound card to access MICFIL based on rpmsg channel Date: Mon, 29 Aug 2022 15:51:39 +0800 Message-Id: <20220829075144.2405000-1-chancel.liu@nxp.com> X-Mailer: git-send-email 2.25.1 X-ClientProxiedBy: SI2PR06CA0012.apcprd06.prod.outlook.com (2603:1096:4:186::13) To VI1PR04MB4222.eurprd04.prod.outlook.com (2603:10a6:803:46::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 45b6a89b-30a0-4e36-0c92-08da8993e577 X-MS-TrafficTypeDiagnostic: PR3PR04MB7482:EE_ 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. Chancel Liu (5): ASoC: dt-bindings: fsl_rpmsg: Add a property to assign platform driver name ASoC: imx-audio-rpmsg: Create rpmsg channel for MICFIL ASoC: imx-pcm-rpmsg: Register different platform drivers ASoC: fsl_rpmsg: Register different CPU DAI drivers ASoC: imx-rpmsg: Assign platform driver used by machine driver to link with .../devicetree/bindings/sound/fsl,rpmsg.yaml | 34 +++++++++++++++++-- sound/soc/fsl/fsl_rpmsg.c | 2 +- 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, 47 insertions(+), 8 deletions(-) --- 2.25.1