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envelope-from=shengjiu.wang@nxp.com;\n receiver=lists.ozlabs.org) smtp.mailfrom=nxp.com", "i=1; mx.microsoft.com 1; spf=pass\n smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass\n header.d=nxp.com; arc=none" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=N9rnxdscyXrArQLu/RfkR9AqJ3lTg3uyxcKOLiWS8u8=;\n b=C3nn3oueS/Qa5yprW9tZ4PSNLOF886BDWYQjYSfWvtTcWeZhxFILzWbKVVNnSd7aP+VCMyk8DuDnk5Sx9NFsepf3RDuvXQ79WqptJV7GiaxhhRLblCZYoi4HnHfzgKKOFr5f2iAleEB7FQsaa+pHmfqXrnclKojfZZ5oqOC2Z0OJCE0zMtZpzi1RLZcZvMJ7h0xr5Tx/yprS3VUUIhB6WqtgsYDICsq7cgNRa3TZuf+l48zEFm7MoNBsgHlh6kz7kfuhJ1BW2ZVu9lrrl51wNSpsOePjOUbJnq+Dd9gz+AI9igU2q/2izV+ldos2ANgAAy6x6z3JiSlhwSdz/W17iA==", "From": "Shengjiu Wang <shengjiu.wang@nxp.com>", "To": "shengjiu.wang@gmail.com,\n\tXiubo.Lee@gmail.com,\n\tfestevam@gmail.com,\n\tnicoleotsuka@gmail.com,\n\tlgirdwood@gmail.com,\n\tbroonie@kernel.org,\n\tperex@perex.cz,\n\ttiwai@suse.com,\n\tlinux-sound@vger.kernel.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-kernel@vger.kernel.org", "Subject": "[PATCH 0/5] ASoC: fsl-asoc-card: Add some improvements", "Date": "Fri, 24 Apr 2026 18:38:01 +0800", "Message-Id": "<20260424103806.2276780-1-shengjiu.wang@nxp.com>", "X-Mailer": "git-send-email 2.37.1", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "X-ClientProxiedBy": "MA5PR01CA0027.INDPRD01.PROD.OUTLOOK.COM\n (2603:1096:a01:178::15) To AM0PR04MB7044.eurprd04.prod.outlook.com\n (2603:10a6:208:191::20)", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": 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(2024-03-25) on lists.ozlabs.org" }, "content": "This patch series addresses several issues in the Freescale Generic ASoC\nSound Card driver related to hardware limitations, DPCM path switching,\nand codec-specific constraints.\n\nThe fsl-asoc-card driver provides a generic machine driver for i.MX SoCs,\nsupporting various codecs and optional ASRC (Asynchronous Sample Rate\nConverter) for sample rate conversion. During testing several issues were\nidentified:\n\n1. Missing channel constraint propagation in DPCM mode\n2. DPCM path switching causing audio dropouts\n3. Hardware channel alignment requirements\n4. Clock generation limitations preventing certain audio formats\n5. Codec-specific PLL frequency violations\n\nShengjiu Wang (5):\n ASoC: fsl-asoc-card: enable dpcm_merged_chan flag for ASRC frontend\n ASoC: fsl-asoc-card: enable ignore_pmdown_time for ASRC case\n ASoC: fsl-asoc-card: add channel and rate constraints for CS42888\n ASoC: fsl-asoc-card: exclude S20_3LE format due to clock limitations\n ASoC: fsl-asoc-card: reduce WM8904 PLL ratio to meet frequency limit\n\n sound/soc/fsl/fsl-asoc-card.c | 88 ++++++++++++++++++++++++++++++++++-\n 1 file changed, 87 insertions(+), 1 deletion(-)" }