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ASoC: intel: add support for specifying PCM format 

With this machines can configure the PCM format applied on SSP port using
the set_fmt API

Signed-off-by: Praveen Diwakar <praveen.diwakar@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Vinod Koul 2015-05-06 22:06:43 +05:30 committed by Mark Brown
parent 711bc9476b
commit 0b44e34549
3 changed files with 115 additions and 0 deletions
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99
sound/soc/intel/atom/sst-atom-controls.c
View File

@ -774,8 +774,107 @@ int sst_handle_vb_timer(struct snd_soc_dai *dai, bool enable)
return ret;
}
static int sst_get_frame_sync_polarity(struct snd_soc_dai *dai,
unsigned int fmt)
{
int format;
format = fmt & SND_SOC_DAIFMT_INV_MASK;
dev_dbg(dai->dev, "Enter:%s, format=%x\n", __func__, format);
switch (format) {
case SND_SOC_DAIFMT_NB_NF:
return SSP_FS_ACTIVE_LOW;
case SND_SOC_DAIFMT_NB_IF:
return SSP_FS_ACTIVE_HIGH;
case SND_SOC_DAIFMT_IB_IF:
return SSP_FS_ACTIVE_LOW;
case SND_SOC_DAIFMT_IB_NF:
return SSP_FS_ACTIVE_HIGH;
default:
dev_err(dai->dev, "Invalid frame sync polarity %d\n", format);
}
return -EINVAL;
}
static int sst_get_ssp_mode(struct snd_soc_dai *dai, unsigned int fmt)
{
int format;
format = (fmt & SND_SOC_DAIFMT_MASTER_MASK);
dev_dbg(dai->dev, "Enter:%s, format=%x\n", __func__, format);
switch (format) {
case SND_SOC_DAIFMT_CBS_CFS:
return SSP_MODE_MASTER;
case SND_SOC_DAIFMT_CBM_CFM:
return SSP_MODE_SLAVE;
default:
dev_err(dai->dev, "Invalid ssp protocol: %d\n", format);
}
return -EINVAL;
}
int sst_fill_ssp_config(struct snd_soc_dai *dai, unsigned int fmt)
{
unsigned int mode;
int fs_polarity;
struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
switch (mode) {
case SND_SOC_DAIFMT_DSP_B:
ctx->ssp_cmd.ssp_protocol = SSP_MODE_PCM;
ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NETWORK << 1);
ctx->ssp_cmd.start_delay = 0;
ctx->ssp_cmd.data_polarity = 1;
ctx->ssp_cmd.frame_sync_width = 1;
break;
case SND_SOC_DAIFMT_DSP_A:
ctx->ssp_cmd.ssp_protocol = SSP_MODE_PCM;
ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NETWORK << 1);
ctx->ssp_cmd.start_delay = 1;
ctx->ssp_cmd.data_polarity = 1;
ctx->ssp_cmd.frame_sync_width = 1;
break;
case SND_SOC_DAIFMT_I2S:
ctx->ssp_cmd.ssp_protocol = SSP_MODE_I2S;
ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NORMAL << 1);
ctx->ssp_cmd.start_delay = 1;
ctx->ssp_cmd.data_polarity = 0;
ctx->ssp_cmd.frame_sync_width = ctx->ssp_cmd.nb_bits_per_slots;
break;
case SND_SOC_DAIFMT_LEFT_J:
ctx->ssp_cmd.ssp_protocol = SSP_MODE_I2S;
ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NORMAL << 1);
ctx->ssp_cmd.start_delay = 0;
ctx->ssp_cmd.data_polarity = 0;
ctx->ssp_cmd.frame_sync_width = ctx->ssp_cmd.nb_bits_per_slots;
break;
default:
dev_dbg(dai->dev, "using default ssp configs\n");
}
fs_polarity = sst_get_frame_sync_polarity(dai, fmt);
if (fs_polarity < 0)
return fs_polarity;
ctx->ssp_cmd.frame_sync_polarity = fs_polarity;
return 0;
}
/**
* sst_ssp_config - contains SSP configuration for media UC
* this can be overwritten by set_dai_xxx APIs
*/
static const struct sst_ssp_config sst_ssp_configs = {
.ssp_id = SSP_CODEC,

1
sound/soc/intel/atom/sst-atom-controls.h
View File

@ -869,6 +869,7 @@ struct sst_enum {
SOC_DAPM_ENUM(SST_MUX_CTL_NAME(xpname, xinstance), \
SST_SSP_MUX_ENUM(xreg, xshift, xtexts))
int sst_fill_ssp_config(struct snd_soc_dai *dai, unsigned int fmt);
void sst_fill_ssp_defaults(struct snd_soc_dai *dai);
#endif

15
sound/soc/intel/atom/sst-mfld-platform-pcm.c
View File

@ -450,6 +450,20 @@ static int sst_be_hw_params(struct snd_pcm_substream *substream,
return ret;
}
static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
{
int ret = 0;
if (!dai->active)
return 0;
ret = sst_fill_ssp_config(dai, fmt);
if (ret < 0)
dev_err(dai->dev, "sst_set_format failed..\n");
return ret;
}
static void sst_disable_ssp(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
@ -475,6 +489,7 @@ static struct snd_soc_dai_ops sst_compr_dai_ops = {
static struct snd_soc_dai_ops sst_be_dai_ops = {
.startup = sst_enable_ssp,
.hw_params = sst_be_hw_params,
.set_fmt = sst_set_format,
.shutdown = sst_disable_ssp,
};