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"https://lore.kernel.org/linuxppc-dev/20260429100028.2739711-1-shengjiu.wang@nxp.com/", "date": "2026-04-29T10:00:22", "name": "[v2,0/5] ASoC: fsl-asoc-card: Add some improvements", "submitter": { "id": 75958, "url": "http://patchwork.ozlabs.org/api/1.2/people/75958/?format=api", "name": "Shengjiu Wang", "email": "shengjiu.wang@nxp.com" }, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20260429100028.2739711-1-shengjiu.wang@nxp.com/mbox/", "series": [ { "id": 502028, "url": "http://patchwork.ozlabs.org/api/1.2/series/502028/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=502028", "date": "2026-04-29T10:00:22", "name": "ASoC: fsl-asoc-card: Add some improvements", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/502028/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2230123/comments/", "headers": { "Return-Path": "\n <linuxppc-dev+bounces-20263-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", 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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\nchanges in v2:\n- Patch 3/5: remove the static constraint_rates and constraint_channels\n variable in fsl_asoc_card_startup(), move them to\n struct fsl_asoc_card_priv, to avoid conflict with other instance\n- Patch 4/5: make exclude S20_3LE format specific to WM8960/WM8962 + SAI\n case, to avoid impact to other users.\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 for WM8960/WM8962 + SAI\n ASoC: fsl-asoc-card: reduce WM8904 PLL ratio to meet frequency limit\n\n sound/soc/fsl/fsl-asoc-card.c | 111 +++++++++++++++++++++++++++++++++-\n 1 file changed, 110 insertions(+), 1 deletion(-)" }