[PATCHv4] ASoC: da7213: add default clock handling
Sebastian Reichel
sebastian.reichel at collabora.com
Fri Jun 26 18:46:23 CEST 2020
This adds default clock/PLL configuration to the driver
for usage with generic drivers like simple-card for usage
with a fixed rate clock.
Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
---
Changes since PATCHv3:
* rebase to v5.8-rc1
* add SRM support for usage in slave mode with simple-card.
I only tested with master mode, though.
---
sound/soc/codecs/da7213.c | 83 ++++++++++++++++++++++++++++++++++++---
sound/soc/codecs/da7213.h | 2 +
2 files changed, 80 insertions(+), 5 deletions(-)
diff --git a/sound/soc/codecs/da7213.c b/sound/soc/codecs/da7213.c
index 3e6ad996741b..1a4fece20bcd 100644
--- a/sound/soc/codecs/da7213.c
+++ b/sound/soc/codecs/da7213.c
@@ -1156,6 +1156,7 @@ static int da7213_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
+ struct da7213_priv *da7213 = snd_soc_component_get_drvdata(component);
u8 dai_ctrl = 0;
u8 fs;
@@ -1181,33 +1182,43 @@ static int da7213_hw_params(struct snd_pcm_substream *substream,
switch (params_rate(params)) {
case 8000:
fs = DA7213_SR_8000;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_98304000;
break;
case 11025:
fs = DA7213_SR_11025;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_90316800;
break;
case 12000:
fs = DA7213_SR_12000;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_98304000;
break;
case 16000:
fs = DA7213_SR_16000;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_98304000;
break;
case 22050:
fs = DA7213_SR_22050;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_90316800;
break;
case 32000:
fs = DA7213_SR_32000;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_98304000;
break;
case 44100:
fs = DA7213_SR_44100;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_90316800;
break;
case 48000:
fs = DA7213_SR_48000;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_98304000;
break;
case 88200:
fs = DA7213_SR_88200;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_90316800;
break;
case 96000:
fs = DA7213_SR_96000;
+ da7213->out_rate = DA7213_PLL_FREQ_OUT_98304000;
break;
default:
return -EINVAL;
@@ -1392,9 +1403,9 @@ static int da7213_set_component_sysclk(struct snd_soc_component *component,
}
/* Supported PLL input frequencies are 32KHz, 5MHz - 54MHz. */
-static int da7213_set_component_pll(struct snd_soc_component *component,
- int pll_id, int source,
- unsigned int fref, unsigned int fout)
+static int _da7213_set_component_pll(struct snd_soc_component *component,
+ int pll_id, int source,
+ unsigned int fref, unsigned int fout)
{
struct da7213_priv *da7213 = snd_soc_component_get_drvdata(component);
@@ -1503,6 +1514,16 @@ static int da7213_set_component_pll(struct snd_soc_component *component,
return 0;
}
+static int da7213_set_component_pll(struct snd_soc_component *component,
+ int pll_id, int source,
+ unsigned int fref, unsigned int fout)
+{
+ struct da7213_priv *da7213 = snd_soc_component_get_drvdata(component);
+ da7213->fixed_clk_auto_pll = false;
+
+ return _da7213_set_component_pll(component, pll_id, source, fref, fout);
+}
+
/* DAI operations */
static const struct snd_soc_dai_ops da7213_dai_ops = {
.hw_params = da7213_hw_params,
@@ -1532,6 +1553,50 @@ static struct snd_soc_dai_driver da7213_dai = {
.symmetric_rates = 1,
};
+static int da7213_set_auto_pll(struct snd_soc_component *component, bool enable)
+{
+ struct da7213_priv *da7213 = snd_soc_component_get_drvdata(component);
+ int mode;
+
+ if (!da7213->fixed_clk_auto_pll)
+ return 0;
+
+ da7213->mclk_rate = clk_get_rate(da7213->mclk);
+
+ if (enable) {
+ /* Slave mode needs SRM for non-harmonic frequencies */
+ if (da7213->master)
+ mode = DA7213_SYSCLK_PLL;
+ else
+ mode = DA7213_SYSCLK_PLL_SRM;
+
+ /* PLL is not required for harmonic frequencies */
+ switch (da7213->out_rate) {
+ case DA7213_PLL_FREQ_OUT_90316800:
+ if (da7213->mclk_rate == 11289600 ||
+ da7213->mclk_rate == 22579200 ||
+ da7213->mclk_rate == 45158400)
+ mode = DA7213_SYSCLK_MCLK;
+ break;
+ case DA7213_PLL_FREQ_OUT_98304000:
+ if (da7213->mclk_rate == 12288000 ||
+ da7213->mclk_rate == 24576000 ||
+ da7213->mclk_rate == 49152000)
+ mode = DA7213_SYSCLK_MCLK;
+
+ break;
+ default:
+ return -1;
+ }
+ } else {
+ /* Disable PLL in standby */
+ mode = DA7213_SYSCLK_MCLK;
+ }
+
+ return _da7213_set_component_pll(component, 0, mode,
+ da7213->mclk_rate, da7213->out_rate);
+}
+
static int da7213_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
@@ -1551,6 +1616,8 @@ static int da7213_set_bias_level(struct snd_soc_component *component,
"Failed to enable mclk\n");
return ret;
}
+
+ da7213_set_auto_pll(component, true);
}
}
break;
@@ -1562,8 +1629,10 @@ static int da7213_set_bias_level(struct snd_soc_component *component,
DA7213_VMID_EN | DA7213_BIAS_EN);
} else {
/* Remove MCLK */
- if (da7213->mclk)
+ if (da7213->mclk) {
+ da7213_set_auto_pll(component, false);
clk_disable_unprepare(da7213->mclk);
+ }
}
break;
case SND_SOC_BIAS_OFF:
@@ -1693,7 +1762,6 @@ static struct da7213_platform_data
return pdata;
}
-
static int da7213_probe(struct snd_soc_component *component)
{
struct da7213_priv *da7213 = snd_soc_component_get_drvdata(component);
@@ -1829,6 +1897,11 @@ static int da7213_probe(struct snd_soc_component *component)
return PTR_ERR(da7213->mclk);
else
da7213->mclk = NULL;
+ } else {
+ /* Do automatic PLL handling assuming fixed clock until
+ * set_pll() has been called. This makes the codec usable
+ * with the simple-audio-card driver. */
+ da7213->fixed_clk_auto_pll = true;
}
return 0;
diff --git a/sound/soc/codecs/da7213.h b/sound/soc/codecs/da7213.h
index 3890829dfb6e..97ccf0ddd2be 100644
--- a/sound/soc/codecs/da7213.h
+++ b/sound/soc/codecs/da7213.h
@@ -535,10 +535,12 @@ struct da7213_priv {
struct regulator_bulk_data supplies[DA7213_NUM_SUPPLIES];
struct clk *mclk;
unsigned int mclk_rate;
+ unsigned int out_rate;
int clk_src;
bool master;
bool alc_calib_auto;
bool alc_en;
+ bool fixed_clk_auto_pll;
struct da7213_platform_data *pdata;
};
--
2.27.0
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