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ASoC: nau8825: add clock management for power saving

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Adjust dapm widget to manage clock from power event for power saving.

Signed-off-by: David Lin <CTLIN0@nuvoton.com>
Signed-off-by: Mac Chiang <mac.chiang@intel.com>
Link: https://lore.kernel.org/r/20211025113857.3860951-3-CTLIN0@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
David Lin 2021-10-25 19:38:58 +08:00 committed by Mark Brown
parent c6167e10e7
commit 6133148ca0
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 33 additions and 2 deletions
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35
sound/soc/codecs/nau8825.c
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@ -47,6 +47,7 @@
static int nau8825_configure_sysclk(struct nau8825 *nau8825,
int clk_id, unsigned int freq);
static bool nau8825_is_jack_inserted(struct regmap *regmap);
struct nau8825_fll {
int mclk_src;
@ -981,6 +982,31 @@ static int nau8825_output_dac_event(struct snd_soc_dapm_widget *w,
return 0;
}
static int system_clock_control(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
struct regmap *regmap = nau8825->regmap;
if (SND_SOC_DAPM_EVENT_OFF(event)) {
dev_dbg(nau8825->dev, "system clock control : POWER OFF\n");
/* Set clock source to disable or internal clock before the
* playback or capture end. Codec needs clock for Jack
* detection and button press if jack inserted; otherwise,
* the clock should be closed.
*/
if (nau8825_is_jack_inserted(regmap)) {
nau8825_configure_sysclk(nau8825,
NAU8825_CLK_INTERNAL, 0);
} else {
nau8825_configure_sysclk(nau8825, NAU8825_CLK_DIS, 0);
}
}
return 0;
}
static int nau8825_biq_coeff_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@ -1094,6 +1120,9 @@ static const struct snd_kcontrol_new nau8825_dacr_mux =
static const struct snd_soc_dapm_widget nau8825_dapm_widgets[] = {
SND_SOC_DAPM_AIF_OUT("AIFTX", "Capture", 0, NAU8825_REG_I2S_PCM_CTRL2,
15, 1),
SND_SOC_DAPM_AIF_IN("AIFRX", "Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_SUPPLY("System Clock", SND_SOC_NOPM, 0, 0,
system_clock_control, SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_INPUT("MIC"),
SND_SOC_DAPM_MICBIAS("MICBIAS", NAU8825_REG_MIC_BIAS, 8, 0),
@ -1182,9 +1211,11 @@ static const struct snd_soc_dapm_route nau8825_dapm_routes[] = {
{"ADC", NULL, "ADC Clock"},
{"ADC", NULL, "ADC Power"},
{"AIFTX", NULL, "ADC"},
{"AIFTX", NULL, "System Clock"},
{"DDACL", NULL, "Playback"},
{"DDACR", NULL, "Playback"},
{"AIFRX", NULL, "System Clock"},
{"DDACL", NULL, "AIFRX"},
{"DDACR", NULL, "AIFRX"},
{"DDACL", NULL, "DDAC Clock"},
{"DDACR", NULL, "DDAC Clock"},
{"DACL Mux", "DACL", "DDACL"},