[alsa-devel] [PATCH] ASoC: Automatically manage WM8996 MICBIAS regulating mode
For non-audio uses like accessory detection we can use a lower quality, unregulated microphone bias, saving a little power. As the hardware can manually enable and disable the biases we can select regulating mode automatically with supply widgets connected to the biases.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8996.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c index 0936ae5..d3277d1 100644 --- a/sound/soc/codecs/wm8996.c +++ b/sound/soc/codecs/wm8996.c @@ -982,6 +982,8 @@ SND_SOC_DAPM_SUPPLY_S("Charge Pump", 2, WM8996_CHARGE_PUMP_1, 15, 0, cp_event, SND_SOC_DAPM_POST_PMU),
SND_SOC_DAPM_SUPPLY("LDO2", WM8996_POWER_MANAGEMENT_2, 1, 0, NULL, 0), +SND_SOC_DAPM_SUPPLY("MICB1 Audio", WM8996_MICBIAS_1, 4, 1, NULL, 0), +SND_SOC_DAPM_SUPPLY("MICB2 Audio", WM8996_MICBIAS_2, 4, 1, NULL, 0), SND_SOC_DAPM_MICBIAS("MICB2", WM8996_POWER_MANAGEMENT_1, 9, 0), SND_SOC_DAPM_MICBIAS("MICB1", WM8996_POWER_MANAGEMENT_1, 8, 0),
@@ -1137,7 +1139,9 @@ static const struct snd_soc_dapm_route wm8996_dapm_routes[] = { { "Charge Pump", NULL, "SYSCLK" },
{ "MICB1", NULL, "LDO2" }, + { "MICB1", NULL, "MICB1 Audio" }, { "MICB2", NULL, "LDO2" }, + { "MICB2", NULL, "MICB2 Audio" },
{ "IN1L PGA", NULL, "IN2LN" }, { "IN1L PGA", NULL, "IN2LP" },
On 20/08/11 19:05, Mark Brown wrote:
For non-audio uses like accessory detection we can use a lower quality, unregulated microphone bias, saving a little power. As the hardware can manually enable and disable the biases we can select regulating mode automatically with supply widgets connected to the biases.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com
sound/soc/codecs/wm8996.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c index 0936ae5..d3277d1 100644 --- a/sound/soc/codecs/wm8996.c +++ b/sound/soc/codecs/wm8996.c @@ -982,6 +982,8 @@ SND_SOC_DAPM_SUPPLY_S("Charge Pump", 2, WM8996_CHARGE_PUMP_1, 15, 0, cp_event, SND_SOC_DAPM_POST_PMU),
SND_SOC_DAPM_SUPPLY("LDO2", WM8996_POWER_MANAGEMENT_2, 1, 0, NULL, 0), +SND_SOC_DAPM_SUPPLY("MICB1 Audio", WM8996_MICBIAS_1, 4, 1, NULL, 0), +SND_SOC_DAPM_SUPPLY("MICB2 Audio", WM8996_MICBIAS_2, 4, 1, NULL, 0), SND_SOC_DAPM_MICBIAS("MICB2", WM8996_POWER_MANAGEMENT_1, 9, 0), SND_SOC_DAPM_MICBIAS("MICB1", WM8996_POWER_MANAGEMENT_1, 8, 0),
@@ -1137,7 +1139,9 @@ static const struct snd_soc_dapm_route wm8996_dapm_routes[] = { { "Charge Pump", NULL, "SYSCLK" },
{ "MICB1", NULL, "LDO2" },
{ "MICB1", NULL, "MICB1 Audio" }, { "MICB2", NULL, "LDO2" },
{ "MICB2", NULL, "MICB2 Audio" },
{ "IN1L PGA", NULL, "IN2LN" }, { "IN1L PGA", NULL, "IN2LP" },
Acked-by: Liam Girdwood lrg@ti.com
participants (2)
-
Liam Girdwood -
Mark Brown