Commit 0c198ed2 authored by PC Liao's avatar PC Liao Committed by Mark Brown
Browse files

ASoC: mediatek: add MCLK source selection



The new machine's MCLK source is from mt8173 which is dynamic from
sampling rate*256. This patch provides the selection for device tree.
Signed-off-by: default avatarPC Liao <pc.liao@mediatek.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 33d919bd
......@@ -12,12 +12,17 @@ Required codec-capture subnode properties:
<&rt5650 0> : Default setting. Connect rt5650 I2S1 for capture. (dai_name = rt5645-aif1)
<&rt5650 1> : Connect rt5650 I2S2 for capture. (dai_name = rt5645-aif2)
- mediatek,mclk: the MCLK source
0 : external oscillator, MCLK = 12.288M
1 : internal source from mt8173, MCLK = sampling rate*256
Example:
sound {
compatible = "mediatek,mt8173-rt5650";
mediatek,audio-codec = <&rt5650>;
mediatek,platform = <&afe>;
mediatek,mclk = <0>;
codec-capture {
sound-dai = <&rt5650 1>;
};
......
......@@ -23,6 +23,20 @@
#define MCLK_FOR_CODECS 12288000
enum mt8173_rt5650_mclk {
MT8173_RT5650_MCLK_EXTERNAL = 0,
MT8173_RT5650_MCLK_INTERNAL,
};
struct mt8173_rt5650_platform_data {
enum mt8173_rt5650_mclk pll_from;
/* 0 = external oscillator; 1 = internal source from mt8173 */
};
static struct mt8173_rt5650_platform_data mt8173_rt5650_priv = {
.pll_from = MT8173_RT5650_MCLK_EXTERNAL,
};
static const struct snd_soc_dapm_widget mt8173_rt5650_widgets[] = {
SND_SOC_DAPM_SPK("Speaker", NULL),
SND_SOC_DAPM_MIC("Int Mic", NULL),
......@@ -54,13 +68,29 @@ static int mt8173_rt5650_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
unsigned int mclk_clock;
int i, ret;
switch (mt8173_rt5650_priv.pll_from) {
case MT8173_RT5650_MCLK_EXTERNAL:
/* mclk = 12.288M */
mclk_clock = MCLK_FOR_CODECS;
break;
case MT8173_RT5650_MCLK_INTERNAL:
/* mclk = sampling rate*256 */
mclk_clock = params_rate(params) * 256;
break;
default:
/* mclk = 12.288M */
mclk_clock = MCLK_FOR_CODECS;
break;
}
for (i = 0; i < rtd->num_codecs; i++) {
struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
/* pll from mclk 12.288M */
ret = snd_soc_dai_set_pll(codec_dai, 0, 0, MCLK_FOR_CODECS,
/* pll from mclk */
ret = snd_soc_dai_set_pll(codec_dai, 0, 0, mclk_clock,
params_rate(params) * 512);
if (ret)
return ret;
......@@ -243,6 +273,17 @@ static int mt8173_rt5650_dev_probe(struct platform_device *pdev)
mt8173_rt5650_codecs[1].dai_name = codec_capture_dai;
}
if (device_property_present(&pdev->dev, "mediatek,mclk")) {
ret = device_property_read_u32(&pdev->dev,
"mediatek,mclk",
&mt8173_rt5650_priv.pll_from);
if (ret) {
dev_err(&pdev->dev,
"%s snd_soc_register_card fail %d\n",
__func__, ret);
}
}
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
......
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