[alsa-devel] [PATCH v2] ASoC: fsl_sai: fix no frame clk in master mode

[Nicolin Chen]

On Thu, Dec 10, 2015 at 11:21:25AM +0800, Zidan Wang wrote:

> diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
> index 8832901..a55a7de 100644
> --- a/sound/soc/fsl/fsl_sai.c
> +++ b/sound/soc/fsl/fsl_sai.c
> @@ -564,6 +564,17 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
>  					   FSL_SAI_CSR_FR, FSL_SAI_CSR_FR);
>  			regmap_update_bits(sai->regmap, FSL_SAI_RCSR,
>  					   FSL_SAI_CSR_FR, FSL_SAI_CSR_FR);
> +
> +			if (!sai->is_slave_mode) {

It'd be nicer to add a simple comment to describe the errata here.
Users may have no idea about this abrupt reset as we do.

You may add my ack to your next version:
Acked-by: Nicolin Chen <nicoleotsuka at gmail.com>

> +				/* Software Reset for both Tx and Rx */
> +				regmap_write(sai->regmap,
> +					     FSL_SAI_TCSR, FSL_SAI_CSR_SR);
> +				regmap_write(sai->regmap,
> +					     FSL_SAI_RCSR, FSL_SAI_CSR_SR);
> +				/* Clear SR bit to finish the reset */
> +				regmap_write(sai->regmap, FSL_SAI_TCSR, 0);
> +				regmap_write(sai->regmap, FSL_SAI_RCSR, 0);
> +			}