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>

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 2b3d961eb6b57300ad84461e64344e853d1fcf1d..9b6c46f54b4d049b330fb40716ba28e729827483 100644 (file)
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -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);