Adjust dapm widget to manage clock from power event for power saving.
Co-developed-by: Mac Chiang <mac.chiang@xxxxxxxxx>
Signed-off-by: Mac Chiang <mac.chiang@xxxxxxxxx>
Signed-off-by: David Lin <CTLIN0@xxxxxxxxxxx>
---
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"},
--
2.25.1
