[PATCH v3 2/3] ASoC: qcom: apq8016-sbc: set default mclk rate

[srinivas . kandagatla]

From: Srinivas Kandagatla <srinivas.kandaga...@linaro.org>

MCLK for internal audio codec is expected to be at 9.6MHz by default.
This patch adds support to 9.6MHz to make the default case possible.

Signed-off-by: Srinivas Kandagatla <srinivas.kandaga...@linaro.org>
---
 sound/soc/qcom/apq8016_sbc.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/sound/soc/qcom/apq8016_sbc.c b/sound/soc/qcom/apq8016_sbc.c
index d084d74..f07aa1e 100644
--- a/sound/soc/qcom/apq8016_sbc.c
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -34,13 +34,16 @@ struct apq8016_sbc_data {
 #define MIC_CTRL_QUA_WS_SLAVE_SEL_10   BIT(17)
 #define MIC_CTRL_TLMM_SCLK_EN          BIT(1)
 #define        SPKR_CTL_PRI_WS_SLAVE_SEL_11    (BIT(17) | BIT(16))
+#define DEFAULT_MCLK_RATE              9600000
 
 static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
 {
        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+       struct snd_soc_codec *codec;
+       struct snd_soc_dai_link *dai_link = rtd->dai_link;
        struct snd_soc_card *card = rtd->card;
        struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
-       int rval = 0;
+       int i, rval;
 
        switch (cpu_dai->id) {
        case MI2S_PRIMARY:
@@ -63,12 +66,24 @@ static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime 
*rtd)
 
        default:
                dev_err(card->dev, "unsupported cpu dai configuration\n");
-               rval = -EINVAL;
-               break;
+               return -EINVAL;
+
+       }
 
+       for (i = 0 ; i < dai_link->num_codecs; i++) {
+               struct snd_soc_dai *dai = rtd->codec_dais[i];
+
+               codec = dai->codec;
+               /* Set default mclk for internal codec */
+               rval = snd_soc_codec_set_sysclk(codec, 0, 0, DEFAULT_MCLK_RATE,
+                                      SND_SOC_CLOCK_IN);
+               if (rval != 0 && rval != -ENOTSUPP) {
+                       dev_warn(card->dev, "Failed to set mclk: %d\n", rval);
+                       return rval;
+               }
        }
 
-       return rval;
+       return 0;
 }
 
 static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
-- 
2.9.3