| Message ID | 1702891731-3417-1-git-send-email-shengjiu.wang@nxp.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | ASoC: fsl_sai: Fix channel swap issue on i.MX8MP | expand |
On Mon, Dec 18, 2023 at 7:10 AM Shengjiu Wang <shengjiu.wang@nxp.com> wrote: > > When flag mclk_with_tere and mclk_direction_output enabled, > The SAI transmitter or receiver will be enabled in very early > stage, that if FSL_SAI_xMR is set by previous case, > for example previous case is one channel, current case is > two channels, then current case started with wrong xMR in > the beginning, then channel swap happen. > > The patch is to clear xMR in hw_free() to avoid such > channel swap issue. > > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Fixes tag, please.
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 32bbe5056a63..546bd4e333b5 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -714,6 +714,9 @@ static int fsl_sai_hw_free(struct snd_pcm_substream *substream, bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; unsigned int ofs = sai->soc_data->reg_offset; + /* Clear xMR to avoid channel swap with mclk_with_tere enabled case */ + regmap_write(sai->regmap, FSL_SAI_xMR(tx), 0); + regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs), FSL_SAI_CR3_TRCE_MASK, 0);
When flag mclk_with_tere and mclk_direction_output enabled, The SAI transmitter or receiver will be enabled in very early stage, that if FSL_SAI_xMR is set by previous case, for example previous case is one channel, current case is two channels, then current case started with wrong xMR in the beginning, then channel swap happen. The patch is to clear xMR in hw_free() to avoid such channel swap issue. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> --- sound/soc/fsl/fsl_sai.c | 3 +++ 1 file changed, 3 insertions(+)