Unverified Commit 97000221 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Mark Brown
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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: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b5d8dffb

sound/soc/codecs/pcm3168a.c

+24 −7
Original line number Diff line number Diff line
@@ -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:

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