From e5b94083d0996b4c69674c8a5563c2eb272557ba Mon Sep 17 00:00:00 2001 From: "Fang, Yang A" Date: Fri, 7 Aug 2015 14:08:15 -0700 Subject: [PATCH] ASoC: max98090: Fix sequencing when starting additional routes Enforce correct device sequencing when configuring a new audio route when there is an existing active audio route(s). This patch fixed recording noise issue while playback is active. We have some registers which require the device to be in full shutdown or to enter full shutdown before the register settings will take effect. Currently the driver is not shutting down the device when a new audio route is created. If a new audio route is made active while there is already an active audio route, then the required register sequencing is violated. A hardware shutdown toggle when creating a new audio route corrects the sequencing error. The device must remain in hardware shutdown for 40ms to allow the internal hardware core to fully shutdown. Signed-off-by: Fang, Yang A Signed-off-by: Sathyanarayana Nujella Acked-by: Anish Kumar Signed-off-by: Mark Brown --- sound/soc/codecs/max98090.c | 46 ++++++++++++++++++++++++++++++++----- sound/soc/codecs/max98090.h | 1 + 2 files changed, 41 insertions(+), 6 deletions(-) diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index 78268f0514e9..2a4c2e12972a 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -850,6 +850,19 @@ static int max98090_micinput_event(struct snd_soc_dapm_widget *w, return 0; } +static int max98090_shdn_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); + struct max98090_priv *max98090 = snd_soc_codec_get_drvdata(codec); + + if (event & SND_SOC_DAPM_POST_PMU) + max98090->shdn_pending = true; + + return 0; + +} + static const char *mic1_mux_text[] = { "IN12", "IN56" }; static SOC_ENUM_SINGLE_DECL(mic1_mux_enum, @@ -1158,9 +1171,11 @@ static const struct snd_soc_dapm_widget max98090_dapm_widgets[] = { SND_SOC_DAPM_SUPPLY("SDOEN", M98090_REG_IO_CONFIGURATION, M98090_SDOEN_SHIFT, 0, NULL, 0), SND_SOC_DAPM_SUPPLY("DMICL_ENA", M98090_REG_DIGITAL_MIC_ENABLE, - M98090_DIGMICL_SHIFT, 0, NULL, 0), + M98090_DIGMICL_SHIFT, 0, max98090_shdn_event, + SND_SOC_DAPM_POST_PMU), SND_SOC_DAPM_SUPPLY("DMICR_ENA", M98090_REG_DIGITAL_MIC_ENABLE, - M98090_DIGMICR_SHIFT, 0, NULL, 0), + M98090_DIGMICR_SHIFT, 0, max98090_shdn_event, + SND_SOC_DAPM_POST_PMU), SND_SOC_DAPM_SUPPLY("AHPF", M98090_REG_FILTER_CONFIG, M98090_AHPF_SHIFT, 0, NULL, 0), @@ -1205,10 +1220,12 @@ static const struct snd_soc_dapm_widget max98090_dapm_widgets[] = { &max98090_right_adc_mixer_controls[0], ARRAY_SIZE(max98090_right_adc_mixer_controls)), - SND_SOC_DAPM_ADC("ADCL", NULL, M98090_REG_INPUT_ENABLE, - M98090_ADLEN_SHIFT, 0), - SND_SOC_DAPM_ADC("ADCR", NULL, M98090_REG_INPUT_ENABLE, - M98090_ADREN_SHIFT, 0), + SND_SOC_DAPM_ADC_E("ADCL", NULL, M98090_REG_INPUT_ENABLE, + M98090_ADLEN_SHIFT, 0, max98090_shdn_event, + SND_SOC_DAPM_POST_PMU), + SND_SOC_DAPM_ADC_E("ADCR", NULL, M98090_REG_INPUT_ENABLE, + M98090_ADREN_SHIFT, 0, max98090_shdn_event, + SND_SOC_DAPM_POST_PMU), SND_SOC_DAPM_AIF_OUT("AIFOUTL", "HiFi Capture", 0, SND_SOC_NOPM, 0, 0), @@ -2536,9 +2553,26 @@ static int max98090_remove(struct snd_soc_codec *codec) return 0; } +static void max98090_seq_notifier(struct snd_soc_dapm_context *dapm, + enum snd_soc_dapm_type event, int subseq) +{ + struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm); + struct max98090_priv *max98090 = snd_soc_codec_get_drvdata(codec); + + if (max98090->shdn_pending) { + snd_soc_update_bits(codec, M98090_REG_DEVICE_SHUTDOWN, + M98090_SHDNN_MASK, 0); + msleep(40); + snd_soc_update_bits(codec, M98090_REG_DEVICE_SHUTDOWN, + M98090_SHDNN_MASK, M98090_SHDNN_MASK); + max98090->shdn_pending = false; + } +} + static struct snd_soc_codec_driver soc_codec_dev_max98090 = { .probe = max98090_probe, .remove = max98090_remove, + .seq_notifier = max98090_seq_notifier, .set_bias_level = max98090_set_bias_level, }; diff --git a/sound/soc/codecs/max98090.h b/sound/soc/codecs/max98090.h index 21ff743f5af2..bc610d9a9ecb 100644 --- a/sound/soc/codecs/max98090.h +++ b/sound/soc/codecs/max98090.h @@ -1543,6 +1543,7 @@ struct max98090_priv { unsigned int pa2en; unsigned int sidetone; bool master; + bool shdn_pending; }; int max98090_mic_detect(struct snd_soc_codec *codec, -- 2.20.1