linux-kernel - Re: [PATCH] ASoC: fsl_sai: Enable MCTL_MCLK

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Date:   Thu, 6 Jul 2023 08:32:57 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Shengjiu Wang <shengjiu.wang@...il.com>
Cc:     Andreas Henriksson <andreas@...al.se>,
        Shengjiu Wang <shengjiu.wang@....com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Hans Söderlund <hans.soderlund@...lbit.se>
Subject: Re: [PATCH] ASoC: fsl_sai: Enable MCTL_MCLK_EN bit for master mode

On Thu, Jul 6, 2023 at 8:19 AM Shengjiu Wang <shengjiu.wang@...il.com> wrote:

> No, this is the code in probe().
> The code with the issue is in fsl_sai_set_bclk().

Yes, I put it in the wrong place.

> The clean way for fixing is to remove the code in fsl_sai_set_bclk()
> and add "fsl,sai-mclk-direction-output;" property in dts for some
> node.

Yes, what about this?

--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -507,7 +507,7 @@ static int fsl_sai_set_bclk(struct snd_soc_dai
*dai, bool tx, u32 freq)
                                   savediv / 2 - 1);
        }

-       if (sai->soc_data->max_register >= FSL_SAI_MCTL) {
+       if (sai->soc_data->max_register >= FSL_SAI_MCTL  &&
sai->mclk_direction_output) {
                /* SAI is in master mode at this point, so enable MCLK */
                regmap_update_bits(sai->regmap, FSL_SAI_MCTL,
                                   FSL_SAI_MCTL_MCLK_EN, FSL_SAI_MCTL_MCLK_EN);