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ASoC: pcm3168a: Add support for multi DIN/DOUT with TDM slots parameter 

The driver was wired to be only usable in DIN1/DOUT1 mode, switching
between TDM and non TDM modes based on the number of channels.

While keeping this functionality for compatibility add support for using
all DIN1/2/3/4 and DOUT1/2/3 if it is needed by setting the TDM slots to
2.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2019-06-20 12:26:56 +03:00 committed by Mark Brown
parent b5d8dffb8c
commit 9700022109
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 24 additions and 7 deletions
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31
sound/soc/codecs/pcm3168a.c
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@ -411,9 +411,11 @@ static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
return -EINVAL;
}
pcm3168a->tdm_slots = slots;
pcm3168a->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
pcm3168a->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;
if (pcm3168a->tdm_slots && pcm3168a->tdm_slots != slots) {
dev_err(component->dev, "Not matching slots %d vs %d\n",
pcm3168a->tdm_slots, slots);
return -EINVAL;
}
if (pcm3168a->slot_width && pcm3168a->slot_width != slot_width) {
dev_err(component->dev, "Not matching slot_width %d vs %d\n",
@ -421,7 +423,11 @@ static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
return -EINVAL;
}
pcm3168a->tdm_slots = slots;
pcm3168a->slot_width = slot_width;
pcm3168a->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
pcm3168a->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;
return 0;
}
@ -434,11 +440,10 @@ static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
bool tx, master_mode;
u32 val, mask, shift, reg;
unsigned int rate, fmt, ratio, max_ratio;
unsigned int chan;
unsigned int tdm_slots;
int i, slot_width;
rate = params_rate(params);
chan = params_channels(params);
ratio = pcm3168a->sysclk / rate;
@ -495,8 +500,20 @@ static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
/* for TDM */
if (chan > 2) {
if (pcm3168a->tdm_slots)
tdm_slots = pcm3168a->tdm_slots;
else
tdm_slots = params_channels(params);
/*
* Switch the codec to TDM mode when more than 2 TDM slots are needed
* for the stream.
* If pcm3168a->tdm_slots is not set or set to more than 2 (8/6 usually)
* then DIN1/DOUT1 is used in TDM mode.
* If pcm3168a->tdm_slots is set to 2 then DIN1/2/3/4 and DOUT1/2/3 is
* used in normal mode, no need to switch to TDM modes.
*/
if (tdm_slots > 2) {
switch (fmt) {
case PCM3168A_FMT_I2S:
case PCM3168A_FMT_DSP_A: