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ASoC: fsl_sai: Implement set_bclk_ratio 

This is to allow machine drivers to set a certain bitclk rate
which might not be exactly rate * frame size.

Cc: NXP Linux Team <linux-imx@nxp.com>
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/20190830215910.31590-1-daniel.baluta@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Viorel Suman 2019-08-31 00:59:10 +03:00 committed by Mark Brown
parent d1c9e44a85
commit 63d1a3488f
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 20 additions and 2 deletions
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21
sound/soc/fsl/fsl_sai.c
View File

@ -137,6 +137,16 @@ static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
return 0;
}
static int fsl_sai_set_dai_bclk_ratio(struct snd_soc_dai *dai,
unsigned int ratio)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
sai->bclk_ratio = ratio;
return 0;
}
static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int fsl_dir)
{
@ -423,8 +433,14 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
slot_width = sai->slot_width;
if (!sai->is_slave_mode) {
ret = fsl_sai_set_bclk(cpu_dai, tx,
slots * slot_width * params_rate(params));
if (sai->bclk_ratio)
ret = fsl_sai_set_bclk(cpu_dai, tx,
sai->bclk_ratio *
params_rate(params));
else
ret = fsl_sai_set_bclk(cpu_dai, tx,
slots * slot_width *
params_rate(params));
if (ret)
return ret;
@ -630,6 +646,7 @@ static void fsl_sai_shutdown(struct snd_pcm_substream *substream,
}
static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
.set_bclk_ratio = fsl_sai_set_dai_bclk_ratio,
.set_sysclk = fsl_sai_set_dai_sysclk,
.set_fmt = fsl_sai_set_dai_fmt,
.set_tdm_slot = fsl_sai_set_dai_tdm_slot,

1
sound/soc/fsl/fsl_sai.h
View File

@ -176,6 +176,7 @@ struct fsl_sai {
unsigned int mclk_streams;
unsigned int slots;
unsigned int slot_width;
unsigned int bclk_ratio;
const struct fsl_sai_soc_data *soc_data;
struct snd_dmaengine_dai_dma_data dma_params_rx;