linux-kernel - [PATCH 1/3] ASoC: imx-card: Need special setting for ak4497 on i.MX8MQ

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Date:   Tue,  4 Jan 2022 18:40:33 +0800
From:   Shengjiu Wang <shengjiu.wang@....com>
To:     timur@...nel.org, nicoleotsuka@...il.com, Xiubo.Lee@...il.com,
        festevam@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, alsa-devel@...a-project.org
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] ASoC: imx-card: Need special setting for ak4497 on i.MX8MQ

The SAI on i.MX8MQ don't support one2one ratio for mclk:bclk, so
the mclk frequency exceeds the supported range of codec for
the case that sample rate is larger than 705kHZ and format is
S32_LE. Update the supported width for such case.

Fixes: aa736700f42f ("ASoC: imx-card: Add imx-card machine driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
 sound/soc/fsl/imx-card.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/sound/soc/fsl/imx-card.c b/sound/soc/fsl/imx-card.c
index e758c4f1b0bc..e0f3aa6d9501 100644
--- a/sound/soc/fsl/imx-card.c
+++ b/sound/soc/fsl/imx-card.c
@@ -553,8 +553,23 @@ static int imx_card_parse_of(struct imx_card_data *data)
 			link_data->cpu_sysclk_id = FSL_SAI_CLK_MAST1;
 
 			/* sai may support mclk/bclk = 1 */
-			if (of_find_property(np, "fsl,mclk-equal-bclk", NULL))
+			if (of_find_property(np, "fsl,mclk-equal-bclk", NULL)) {
 				link_data->one2one_ratio = true;
+			} else {
+				int i;
+
+				/*
+				 * i.MX8MQ don't support one2one ratio, then
+				 * with ak4497 only 16bit case is supported.
+				 */
+				for (i = 0; i < ARRAY_SIZE(ak4497_fs_mul); i++) {
+					if (ak4497_fs_mul[i].rmin == 705600 &&
+					    ak4497_fs_mul[i].rmax == 768000) {
+						ak4497_fs_mul[i].wmin = 32;
+						ak4497_fs_mul[i].wmax = 32;
+					}
+				}
+			}
 		}
 
 		link->cpus->of_node = args.np;
-- 
2.17.1