Fix the ordering problem in DAPM domain, when the user changes between digital and analog sources during active capture (or loopback) scenario. Before this patch, when the user changed from analog source to digital there were a short time, when the codec enabled analog mic bias (2.2 volts) instead of the correct digital mic bias (1.8 volts) to the digital microphones. This behaviour caused by the former implementation of selecting the correct type of bias. This was done at the POST_REG event of the DAPM_MUX_E("TXx Capture Route") widget. By moving the bias type selection as DAPM_SUPPLY and connecting it to the corresponding digimic widget the problematic situation can be avoided.

Signed-off-by: Peter Ujfalusi peter.ujfalusi@nokia.com --- sound/soc/codecs/twl4030.c | 48 +++++++++++--------------------------------- 1 files changed, 12 insertions(+), 36 deletions(-)

diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c index d401c59..7b618bb 100644 --- a/sound/soc/codecs/twl4030.c +++ b/sound/soc/codecs/twl4030.c @@ -577,36 +577,6 @@ static const struct snd_kcontrol_new twl4030_dapm_dbypassv_control = TWL4030_REG_VSTPGA, 0, 0x29, 0, twl4030_dapm_dbypassv_tlv);

-static int micpath_event(struct snd_soc_dapm_widget *w, - struct snd_kcontrol *kcontrol, int event) -{ - struct soc_enum *e = (struct soc_enum *)w->kcontrols->private_value; - unsigned char adcmicsel, micbias_ctl; - - adcmicsel = twl4030_read_reg_cache(w->codec, TWL4030_REG_ADCMICSEL); - micbias_ctl = twl4030_read_reg_cache(w->codec, TWL4030_REG_MICBIAS_CTL); - /* Prepare the bits for the given TX path: - * shift_l == 0: TX1 microphone path - * shift_l == 2: TX2 microphone path */ - if (e->shift_l) { - /* TX2 microphone path */ - if (adcmicsel & TWL4030_TX2IN_SEL) - micbias_ctl |= TWL4030_MICBIAS2_CTL; /* digimic */ - else - micbias_ctl &= ~TWL4030_MICBIAS2_CTL; - } else { - /* TX1 microphone path */ - if (adcmicsel & TWL4030_TX1IN_SEL) - micbias_ctl |= TWL4030_MICBIAS1_CTL; /* digimic */ - else - micbias_ctl &= ~TWL4030_MICBIAS1_CTL; - } - - twl4030_write(w->codec, TWL4030_REG_MICBIAS_CTL, micbias_ctl); - - return 0; -} - /* * Output PGA builder: * Handle the muting and unmuting of the given output (turning off the @@ -1430,12 +1400,10 @@ static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = { /* Analog/Digital mic path selection. TX1 Left/Right: either analog Left/Right or Digimic0 TX2 Left/Right: either analog Left/Right or Digimic1 */ - SND_SOC_DAPM_MUX_E("TX1 Capture Route", SND_SOC_NOPM, 0, 0, - &twl4030_dapm_micpathtx1_control, micpath_event, - SND_SOC_DAPM_POST_REG), - SND_SOC_DAPM_MUX_E("TX2 Capture Route", SND_SOC_NOPM, 0, 0, - &twl4030_dapm_micpathtx2_control, micpath_event, - SND_SOC_DAPM_POST_REG), + SND_SOC_DAPM_MUX("TX1 Capture Route", SND_SOC_NOPM, 0, 0, + &twl4030_dapm_micpathtx1_control), + SND_SOC_DAPM_MUX("TX2 Capture Route", SND_SOC_NOPM, 0, 0, + &twl4030_dapm_micpathtx2_control),

/* Analog input mixers for the capture amplifiers */ SND_SOC_DAPM_MIXER("Analog Left", @@ -1459,6 +1427,11 @@ static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = { TWL4030_REG_ADCMICSEL, 3, 0, NULL, 0, digimic_event, SND_SOC_DAPM_POST_PMU),

+ SND_SOC_DAPM_SUPPLY("micbias1 select", TWL4030_REG_MICBIAS_CTL, 5, 0, + NULL, 0), + SND_SOC_DAPM_SUPPLY("micbias2 select", TWL4030_REG_MICBIAS_CTL, 6, 0, + NULL, 0), + SND_SOC_DAPM_MICBIAS("Mic Bias 1", TWL4030_REG_MICBIAS_CTL, 0, 0), SND_SOC_DAPM_MICBIAS("Mic Bias 2", TWL4030_REG_MICBIAS_CTL, 1, 0), SND_SOC_DAPM_MICBIAS("Headset Mic Bias", TWL4030_REG_MICBIAS_CTL, 2, 0), @@ -1590,6 +1563,9 @@ static const struct snd_soc_dapm_route intercon[] = { {"Digimic0 Enable", NULL, "DIGIMIC0"}, {"Digimic1 Enable", NULL, "DIGIMIC1"},

+ {"DIGIMIC0", NULL, "micbias1 select"}, + {"DIGIMIC1", NULL, "micbias2 select"}, + /* TX1 Left capture path */ {"TX1 Capture Route", "Analog", "ADC Physical Left"}, {"TX1 Capture Route", "Digimic0", "Digimic0 Enable"},