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ASoC: Defer all WM8962 clocking configuration until power up 

Don't require an audio rate SYSCLK in hw_params() in order to better
support microphone detection use cases.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-06-08 14:44:06 +01:00
parent 8f63aaa887
commit 417ceff939
1 changed files with 33 additions and 27 deletions
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60
sound/soc/codecs/wm8962.c
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@ -2790,18 +2790,44 @@ static const int bclk_divs[] = {
1, -1, 2, 3, 4, -1, 6, 8, -1, 12, 16, 24, -1, 32, 32, 32
};
static const int sysclk_rates[] = {
64, 128, 192, 256, 384, 512, 768, 1024, 1408, 1536,
};
static void wm8962_configure_bclk(struct snd_soc_codec *codec)
{
struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec);
int dspclk, i;
int clocking2 = 0;
int clocking4 = 0;
int aif2 = 0;
if (!wm8962->bclk) {
dev_dbg(codec->dev, "No BCLK rate configured\n");
if (!wm8962->sysclk_rate) {
dev_dbg(codec->dev, "No SYSCLK configured\n");
return;
}
if (!wm8962->bclk || !wm8962->lrclk) {
dev_dbg(codec->dev, "No audio clocks configured\n");
return;
}
for (i = 0; i < ARRAY_SIZE(sysclk_rates); i++) {
if (sysclk_rates[i] == wm8962->sysclk_rate / wm8962->lrclk) {
clocking4 |= i << WM8962_SYSCLK_RATE_SHIFT;
break;
}
}
if (i == ARRAY_SIZE(sysclk_rates)) {
dev_err(codec->dev, "Unsupported sysclk ratio %d\n",
wm8962->sysclk_rate / wm8962->lrclk);
return;
}
snd_soc_update_bits(codec, WM8962_CLOCKING_4,
WM8962_SYSCLK_RATE_MASK, clocking4);
dspclk = snd_soc_read(codec, WM8962_CLOCKING1);
if (dspclk < 0) {
dev_err(codec->dev, "Failed to read DSPCLK: %d\n", dspclk);
@ -2871,6 +2897,8 @@ static int wm8962_set_bias_level(struct snd_soc_codec *codec,
/* VMID 2*50k */
snd_soc_update_bits(codec, WM8962_PWR_MGMT_1,
WM8962_VMID_SEL_MASK, 0x80);
wm8962_configure_bclk(codec);
break;
case SND_SOC_BIAS_STANDBY:
@ -2903,8 +2931,6 @@ static int wm8962_set_bias_level(struct snd_soc_codec *codec,
snd_soc_update_bits(codec, WM8962_CLOCKING2,
WM8962_CLKREG_OVD,
WM8962_CLKREG_OVD);
wm8962_configure_bclk(codec);
}
/* VMID 2*250k */
@ -2945,10 +2971,6 @@ static const struct {
{ 96000, 6 },
};
static const int sysclk_rates[] = {
64, 128, 192, 256, 384, 512, 768, 1024, 1408, 1536,
};
static int wm8962_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
@ -2956,41 +2978,27 @@ static int wm8962_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec);
int rate = params_rate(params);
int i;
int aif0 = 0;
int adctl3 = 0;
int clocking4 = 0;
wm8962->bclk = snd_soc_params_to_bclk(params);
wm8962->lrclk = params_rate(params);
for (i = 0; i < ARRAY_SIZE(sr_vals); i++) {
if (sr_vals[i].rate == rate) {
if (sr_vals[i].rate == wm8962->lrclk) {
adctl3 |= sr_vals[i].reg;
break;
}
}
if (i == ARRAY_SIZE(sr_vals)) {
dev_err(codec->dev, "Unsupported rate %dHz\n", rate);
dev_err(codec->dev, "Unsupported rate %dHz\n", wm8962->lrclk);
return -EINVAL;
}
if (rate % 8000 == 0)
if (wm8962->lrclk % 8000 == 0)
adctl3 |= WM8962_SAMPLE_RATE_INT_MODE;
for (i = 0; i < ARRAY_SIZE(sysclk_rates); i++) {
if (sysclk_rates[i] == wm8962->sysclk_rate / rate) {
clocking4 |= i << WM8962_SYSCLK_RATE_SHIFT;
break;
}
}
if (i == ARRAY_SIZE(sysclk_rates)) {
dev_err(codec->dev, "Unsupported sysclk ratio %d\n",
wm8962->sysclk_rate / rate);
return -EINVAL;
}
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
@ -3012,8 +3020,6 @@ static int wm8962_hw_params(struct snd_pcm_substream *substream,
snd_soc_update_bits(codec, WM8962_ADDITIONAL_CONTROL_3,
WM8962_SAMPLE_RATE_INT_MODE |
WM8962_SAMPLE_RATE_MASK, adctl3);
snd_soc_update_bits(codec, WM8962_CLOCKING_4,
WM8962_SYSCLK_RATE_MASK, clocking4);
wm8962_configure_bclk(codec);