Adjust dapm widget to manage clock from power event for power saving.
Co-developed-by: Mac Chiang mac.chiang@intel.com Signed-off-by: Mac Chiang mac.chiang@intel.com Signed-off-by: David Lin CTLIN0@nuvoton.com --- sound/soc/codecs/nau8825.c | 35 +++++++++++++++++++++++++++++++++-- 1 file changed, 33 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c index a356f26735bd..eed017d5df4b 100644 --- a/sound/soc/codecs/nau8825.c +++ b/sound/soc/codecs/nau8825.c @@ -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"},