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Commit b272efc8 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: arizona: Factor out rate selection code 



In preparation for more advanced sample rate managment move the existing
code out of the main hw_params() function.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 66b6eaf2

sound/soc/codecs/arizona.c

+53 −36
Original line number Diff line number Diff line
@@ -702,7 +702,7 @@ static int arizona_startup(struct snd_pcm_substream *substream, 
					  constraint);

}



static int arizona_hw_params(struct snd_pcm_substream *substream,

static int arizona_hw_params_rate(struct snd_pcm_substream *substream,

				  struct snd_pcm_hw_params *params,

				  struct snd_soc_dai *dai)

{
@@ -710,28 +710,12 @@ static int arizona_hw_params(struct snd_pcm_substream *substream, 
	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);

	struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];

	int base = dai->driver->base;

	const int *rates;

	int i;

	int bclk, lrclk, wl, frame, sr_val;



	if (params_rate(params) % 8000)

		rates = &arizona_44k1_bclk_rates[0];

	else

		rates = &arizona_48k_bclk_rates[0];



	for (i = 0; i < ARRAY_SIZE(arizona_44k1_bclk_rates); i++) {

		if (rates[i] >= snd_soc_params_to_bclk(params) &&

		    rates[i] % params_rate(params) == 0) {

			bclk = i;

			break;

		}

	}

	if (i == ARRAY_SIZE(arizona_44k1_bclk_rates)) {

		arizona_aif_err(dai, "Unsupported sample rate %dHz\n",

				params_rate(params));

		return -EINVAL;

	}

	int i, sr_val;



	/*

	 * We will need to be more flexible than this in future,

	 * currently we use a single sample rate for SYSCLK.

	 */

	for (i = 0; i < ARRAY_SIZE(arizona_sr_vals); i++)

		if (arizona_sr_vals[i] == params_rate(params))

			break;
@@ -742,28 +726,18 @@ static int arizona_hw_params(struct snd_pcm_substream *substream, 
	}

	sr_val = i;



	lrclk = snd_soc_params_to_bclk(params) / params_rate(params);



	arizona_aif_dbg(dai, "BCLK %dHz LRCLK %dHz\n",

			rates[bclk], rates[bclk] / lrclk);



	wl = snd_pcm_format_width(params_format(params));

	frame = wl << ARIZONA_AIF1TX_WL_SHIFT | wl;



	/*

	 * We will need to be more flexible than this in future,

	 * currently we use a single sample rate for SYSCLK.

	 */

	switch (dai_priv->clk) {

	case ARIZONA_CLK_SYSCLK:

		snd_soc_update_bits(codec, ARIZONA_SAMPLE_RATE_1,

				    ARIZONA_SAMPLE_RATE_1_MASK, sr_val);

		if (base)

			snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,

					    ARIZONA_AIF1_RATE_MASK, 0);

		break;

	case ARIZONA_CLK_ASYNCCLK:

		snd_soc_update_bits(codec, ARIZONA_ASYNC_SAMPLE_RATE_1,

				    ARIZONA_ASYNC_SAMPLE_RATE_MASK, sr_val);

		if (base)

			snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,

					    ARIZONA_AIF1_RATE_MASK,

					    8 << ARIZONA_AIF1_RATE_SHIFT);
@@ -773,6 +747,49 @@ static int arizona_hw_params(struct snd_pcm_substream *substream, 
		return -EINVAL;

	}



	return 0;

}



static int arizona_hw_params(struct snd_pcm_substream *substream,

			     struct snd_pcm_hw_params *params,

			     struct snd_soc_dai *dai)

{

	struct snd_soc_codec *codec = dai->codec;

	int base = dai->driver->base;

	const int *rates;

	int i, ret;

	int bclk, lrclk, wl, frame;



	if (params_rate(params) % 8000)

		rates = &arizona_44k1_bclk_rates[0];

	else

		rates = &arizona_48k_bclk_rates[0];



	for (i = 0; i < ARRAY_SIZE(arizona_44k1_bclk_rates); i++) {

		if (rates[i] >= snd_soc_params_to_bclk(params) &&

		    rates[i] % params_rate(params) == 0) {

			bclk = i;

			break;

		}

	}

	if (i == ARRAY_SIZE(arizona_44k1_bclk_rates)) {

		arizona_aif_err(dai, "Unsupported sample rate %dHz\n",

				params_rate(params));

		return -EINVAL;

	}



	lrclk = snd_soc_params_to_bclk(params) / params_rate(params);



	arizona_aif_dbg(dai, "BCLK %dHz LRCLK %dHz\n",

			rates[bclk], rates[bclk] / lrclk);



	wl = snd_pcm_format_width(params_format(params));

	frame = wl << ARIZONA_AIF1TX_WL_SHIFT | wl;



	ret = arizona_hw_params_rate(substream, params, dai);

	if (ret != 0)

		return ret;



	snd_soc_update_bits(codec, base + ARIZONA_AIF_BCLK_CTRL,

			    ARIZONA_AIF1_BCLK_FREQ_MASK, bclk);

	snd_soc_update_bits(codec, base + ARIZONA_AIF_TX_BCLK_RATE,