{"id":2227835,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2227835/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260424103806.2276780-5-shengjiu.wang@nxp.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.1/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/"},"msgid":"<20260424103806.2276780-5-shengjiu.wang@nxp.com>","date":"2026-04-24T10:38:05","name":"[4/5] ASoC: fsl-asoc-card: exclude S20_3LE format due to clock 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255baff3-c604-45ab-03cb-08dea1ed4f83","X-MS-Exchange-CrossTenant-AuthSource":"AM0PR04MB7044.eurprd04.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"24 Apr 2026 10:36:14.8717\n (UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"686ea1d3-bc2b-4c6f-a92c-d99c5c301635","X-MS-Exchange-CrossTenant-MailboxType":"HOSTED","X-MS-Exchange-CrossTenant-UserPrincipalName":"\n tV1GRzqrfYV7354KOMxj1tgKH6Fxf5Dq8wiRBh66JvJMaBlIq/Jnv0aNqAHIPwlzho3/bFqoyxOgc9BYi9bLRw==","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"PAXPR04MB9075","X-Spam-Status":"No, score=0.8 required=3.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO,\n\tSPF_HELO_PASS,T_SPF_PERMERROR autolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"The S20_3LE format (20-bit samples in 3 bytes) requires bit clock\nfrequencies that cannot be generated by i.MX SAI/ESAI hardware.\n\nSAI/ESAI derive BCLK from MCLK using integer dividers only. S20_3LE\nrequires non-integer divider ratios with standard MCLK frequencies.\nFor example, 48kHz stereo needs 1.920 MHz BCLK, which requires a\ndivider of 6.4 from 12.288 MHz MCLK (not an integer).\n\nAdd a format constraint to exclude S20_3LE, preventing clock\nconfiguration failures. Users should use S16_LE, S24_LE, or S32_LE\ninstead.\n\nSigned-off-by: Shengjiu Wang \n---\n sound/soc/fsl/fsl-asoc-card.c | 10 ++++++++++\n 1 file changed, 10 insertions(+)","diff":"diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c\nindex 50d7a5f2d79e..36c789f15582 100644\n--- a/sound/soc/fsl/fsl-asoc-card.c\n+++ b/sound/soc/fsl/fsl-asoc-card.c\n@@ -320,6 +320,16 @@ static int fsl_asoc_card_startup(struct snd_pcm_substream *substream)\n \tstatic struct snd_pcm_hw_constraint_list constraint_channels;\n \tint ret;\n \n+\t/*\n+\t * Remove S20_3LE as the clock (sysclk, bclk) can't be acquired\n+\t * due to non-integer divider ratios.\n+\t */\n+\tret = snd_pcm_hw_constraint_mask64(runtime,\n+\t\t\t\t\t SNDRV_PCM_HW_PARAM_FORMAT,\n+\t\t\t\t\t ~SNDRV_PCM_FMTBIT_S20_3LE);\n+\tif (ret)\n+\t\treturn ret;\n+\n \tconstraint_channels.list = priv->support_channels;\n \tconstraint_channels.count = priv->num_channels;\n \tconstraint_rates.list = priv->support_rates;\n","prefixes":["4/5"]}