On Thu, Jul 18, 2019 at 12:03 PM Oleksandr Suvorov <oleksandr.suvorov@xxxxxxxxxxx> wrote: > > VAG power control is improved to fit the manual [1]. This patch fixes as > minimum one bug: if customer muxes Headphone to Line-In right after boot, > the VAG power remains off that leads to poor sound quality from line-in. > > I.e. after boot: > - Connect sound source to Line-In jack; > - Connect headphone to HP jack; > - Run following commands: > $ amixer set 'Headphone' 80% > $ amixer set 'Headphone Mux' LINE_IN > > Change VAG power on/off control according to the following algorithm: > - turn VAG power ON on the 1st incoming event. > - keep it ON if there is any active VAG consumer (ADC/DAC/HP/Line-In). > - turn VAG power OFF when there is the latest consumer's pre-down event > come. > - always delay after VAG power OFF to avoid pop. > - delay after VAG power ON if the initiative consumer is Line-In, this > prevents pop during line-in muxing. > > According to the data sheet [1], to avoid any pops/clicks, > the outputs should be muted during input/output > routing changes. > > [1] https://www.nxp.com/docs/en/data-sheet/SGTL5000.pdf > > Cc: stable@xxxxxxxxxxxxxxx > Fixes: 9b34e6cc3bc2 ("ASoC: Add Freescale SGTL5000 codec support") > Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@xxxxxxxxxxx> > Reviewed-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx> > Reviewed-by: Fabio Estevam <festevam@xxxxxxxxx> > > --- > > Changes in v5: > - Improve commit message > - Add explicit stable tag > > Changes in v4: > - Code optimization, simplify function signature > (thanks to Cezary Rojewski <cezary.rojewski@xxxxxxxxx> for an idea) > - CC the patch to kernel-stable > - Add a Fixes tag > > Changes in v3: > - Add the reference to NXP SGTL5000 data sheet to commit message > > Changes in v2: > - Fix patch formatting > > sound/soc/codecs/sgtl5000.c | 216 ++++++++++++++++++++++++++++++------ > 1 file changed, 185 insertions(+), 31 deletions(-) > > diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c > index a6a4748c97f9d..a2aeb5fb9b537 100644 > --- a/sound/soc/codecs/sgtl5000.c > +++ b/sound/soc/codecs/sgtl5000.c > @@ -31,6 +31,13 @@ > #define SGTL5000_DAP_REG_OFFSET 0x0100 > #define SGTL5000_MAX_REG_OFFSET 0x013A > > +/* Delay for the VAG ramp up */ > +#define SGTL5000_VAG_POWERUP_DELAY 500 /* ms */ > +/* Delay for the VAG ramp down */ > +#define SGTL5000_VAG_POWERDOWN_DELAY 500 /* ms */ > + > +#define SGTL5000_OUTPUTS_MUTE (SGTL5000_HP_MUTE | SGTL5000_LINE_OUT_MUTE) > + > /* default value of sgtl5000 registers */ > static const struct reg_default sgtl5000_reg_defaults[] = { > { SGTL5000_CHIP_DIG_POWER, 0x0000 }, > @@ -123,6 +130,19 @@ enum { > I2S_SCLK_STRENGTH_HIGH, > }; > > +enum { > + HP_POWER_EVENT, > + DAC_POWER_EVENT, > + ADC_POWER_EVENT, > + LAST_POWER_EVENT > +}; > + > +static u16 mute_mask[] = { > + SGTL5000_HP_MUTE, > + SGTL5000_OUTPUTS_MUTE, > + SGTL5000_OUTPUTS_MUTE > +}; > + > /* sgtl5000 private structure in codec */ > struct sgtl5000_priv { > int sysclk; /* sysclk rate */ > @@ -137,8 +157,109 @@ struct sgtl5000_priv { > u8 micbias_voltage; > u8 lrclk_strength; > u8 sclk_strength; > + u16 mute_state[LAST_POWER_EVENT]; > }; > > +static inline int hp_sel_input(struct snd_soc_component *component) > +{ > + return (snd_soc_component_read32(component, SGTL5000_CHIP_ANA_CTRL) & > + SGTL5000_HP_SEL_MASK) >> SGTL5000_HP_SEL_SHIFT; > +} > + > +static inline u16 mute_output(struct snd_soc_component *component, > + u16 mute_mask) > +{ > + u16 mute_reg = snd_soc_component_read32(component, > + SGTL5000_CHIP_ANA_CTRL); > + > + snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_CTRL, > + mute_mask, mute_mask); > + return mute_reg; > +} > + > +static inline void restore_output(struct snd_soc_component *component, > + u16 mute_mask, u16 mute_reg) > +{ > + snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_CTRL, > + mute_mask, mute_reg); > +} > + > +static void vag_power_on(struct snd_soc_component *component, u32 source) > +{ > + if (snd_soc_component_read32(component, SGTL5000_CHIP_ANA_POWER) & > + SGTL5000_VAG_POWERUP) > + return; > + > + snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER, > + SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP); > + > + /* When VAG powering on to get local loop from Line-In, the sleep > + * is required to avoid loud pop. > + */ > + if (hp_sel_input(component) == SGTL5000_HP_SEL_LINE_IN && > + source == HP_POWER_EVENT) > + msleep(SGTL5000_VAG_POWERUP_DELAY); > +} > + > +static int vag_power_consumers(struct snd_soc_component *component, > + u16 ana_pwr_reg, u32 source) > +{ > + int consumers = 0; > + > + /* count dac/adc consumers unconditional */ > + if (ana_pwr_reg & SGTL5000_DAC_POWERUP) > + consumers++; > + if (ana_pwr_reg & SGTL5000_ADC_POWERUP) > + consumers++; > + > + /* > + * If the event comes from HP and Line-In is selected, > + * current action is 'DAC to be powered down'. > + * As HP_POWERUP is not set when HP muxed to line-in, > + * we need to keep VAG power ON. > + */ > + if (source == HP_POWER_EVENT) { > + if (hp_sel_input(component) == SGTL5000_HP_SEL_LINE_IN) > + consumers++; > + } else { > + if (ana_pwr_reg & SGTL5000_HP_POWERUP) > + consumers++; > + } > + > + return consumers; > +} > + > +static void vag_power_off(struct snd_soc_component *component, u32 source) > +{ > + u16 ana_pwr = snd_soc_component_read32(component, > + SGTL5000_CHIP_ANA_POWER); > + > + if (!(ana_pwr & SGTL5000_VAG_POWERUP)) > + return; > + > + /* > + * This function calls when any of VAG power consumers is disappearing. > + * Thus, if there is more than one consumer at the moment, as minimum > + * one consumer will definitely stay after the end of the current > + * event. > + * Don't clear VAG_POWERUP if 2 or more consumers of VAG present: > + * - LINE_IN (for HP events) / HP (for DAC/ADC events) > + * - DAC > + * - ADC > + * (the current consumer is disappearing right now) > + */ > + if (vag_power_consumers(component, ana_pwr, source) >= 2) > + return; > + > + snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER, > + SGTL5000_VAG_POWERUP, 0); > + /* In power down case, we need wait 400-1000 ms > + * when VAG fully ramped down. > + * As longer we wait, as smaller pop we've got. > + */ > + msleep(SGTL5000_VAG_POWERDOWN_DELAY); > +} > + > /* > * mic_bias power on/off share the same register bits with > * output impedance of mic bias, when power on mic bias, we > @@ -170,36 +291,30 @@ static int mic_bias_event(struct snd_soc_dapm_widget *w, > return 0; > } > > -/* > - * As manual described, ADC/DAC only works when VAG powerup, > - * So enabled VAG before ADC/DAC up. > - * In power down case, we need wait 400ms when vag fully ramped down. > - */ > -static int power_vag_event(struct snd_soc_dapm_widget *w, > - struct snd_kcontrol *kcontrol, int event) > +static int vag_and_mute_control(struct snd_soc_component *component, > + int event, int event_source) > { > - struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); > - const u32 mask = SGTL5000_DAC_POWERUP | SGTL5000_ADC_POWERUP; > + struct sgtl5000_priv *sgtl5000 = > + snd_soc_component_get_drvdata(component); > > switch (event) { > - case SND_SOC_DAPM_POST_PMU: > - snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER, > - SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP); > - msleep(400); > + case SND_SOC_DAPM_PRE_PMU: > + sgtl5000->mute_state[event_source] = > + mute_output(component, mute_mask[event_source]); > + break; > + case SND_SOC_DAPM_POST_PMU: > + vag_power_on(component, event_source); > + restore_output(component, mute_mask[event_source], > + sgtl5000->mute_state[event_source]); > break; > - > case SND_SOC_DAPM_PRE_PMD: > - /* > - * Don't clear VAG_POWERUP, when both DAC and ADC are > - * operational to prevent inadvertently starving the > - * other one of them. > - */ > - if ((snd_soc_component_read32(component, SGTL5000_CHIP_ANA_POWER) & > - mask) != mask) { > - snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER, > - SGTL5000_VAG_POWERUP, 0); > - msleep(400); > - } > + sgtl5000->mute_state[event_source] = > + mute_output(component, mute_mask[event_source]); > + vag_power_off(component, event_source); > + break; > + case SND_SOC_DAPM_POST_PMD: > + restore_output(component, mute_mask[event_source], > + sgtl5000->mute_state[event_source]); > break; > default: > break; > @@ -208,6 +323,41 @@ static int power_vag_event(struct snd_soc_dapm_widget *w, > return 0; > } > > +/* > + * Mute Headphone when power it up/down. > + * Control VAG power on HP power path. > + */ > +static int headphone_pga_event(struct snd_soc_dapm_widget *w, > + struct snd_kcontrol *kcontrol, int event) > +{ > + struct snd_soc_component *component = > + snd_soc_dapm_to_component(w->dapm); > + > + return vag_and_mute_control(component, event, HP_POWER_EVENT); > +} > + > +/* As manual describes, ADC/DAC powering up/down requires > + * to mute outputs to avoid pops. > + * Control VAG power on ADC/DAC power path. > + */ > +static int adc_updown_depop(struct snd_soc_dapm_widget *w, > + struct snd_kcontrol *kcontrol, int event) > +{ > + struct snd_soc_component *component = > + snd_soc_dapm_to_component(w->dapm); > + > + return vag_and_mute_control(component, event, ADC_POWER_EVENT); > +} > + > +static int dac_updown_depop(struct snd_soc_dapm_widget *w, > + struct snd_kcontrol *kcontrol, int event) > +{ > + struct snd_soc_component *component = > + snd_soc_dapm_to_component(w->dapm); > + > + return vag_and_mute_control(component, event, DAC_POWER_EVENT); > +} > + > /* input sources for ADC */ > static const char *adc_mux_text[] = { > "MIC_IN", "LINE_IN" > @@ -280,7 +430,10 @@ static const struct snd_soc_dapm_widget sgtl5000_dapm_widgets[] = { > mic_bias_event, > SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), > > - SND_SOC_DAPM_PGA("HP", SGTL5000_CHIP_ANA_POWER, 4, 0, NULL, 0), > + SND_SOC_DAPM_PGA_E("HP", SGTL5000_CHIP_ANA_POWER, 4, 0, NULL, 0, > + headphone_pga_event, > + SND_SOC_DAPM_PRE_POST_PMU | > + SND_SOC_DAPM_PRE_POST_PMD), > SND_SOC_DAPM_PGA("LO", SGTL5000_CHIP_ANA_POWER, 0, 0, NULL, 0), > > SND_SOC_DAPM_MUX("Capture Mux", SND_SOC_NOPM, 0, 0, &adc_mux), > @@ -301,11 +454,12 @@ static const struct snd_soc_dapm_widget sgtl5000_dapm_widgets[] = { > 0, SGTL5000_CHIP_DIG_POWER, > 1, 0), > > - SND_SOC_DAPM_ADC("ADC", "Capture", SGTL5000_CHIP_ANA_POWER, 1, 0), > - SND_SOC_DAPM_DAC("DAC", "Playback", SGTL5000_CHIP_ANA_POWER, 3, 0), > - > - SND_SOC_DAPM_PRE("VAG_POWER_PRE", power_vag_event), > - SND_SOC_DAPM_POST("VAG_POWER_POST", power_vag_event), > + SND_SOC_DAPM_ADC_E("ADC", "Capture", SGTL5000_CHIP_ANA_POWER, 1, 0, > + adc_updown_depop, SND_SOC_DAPM_PRE_POST_PMU | > + SND_SOC_DAPM_PRE_POST_PMD), > + SND_SOC_DAPM_DAC_E("DAC", "Playback", SGTL5000_CHIP_ANA_POWER, 3, 0, > + dac_updown_depop, SND_SOC_DAPM_PRE_POST_PMU | > + SND_SOC_DAPM_PRE_POST_PMD), > }; > > /* routes for sgtl5000 */ > -- > 2.20.1 > Reviewed-by: Igor Opaniuk <igor.opaniuk@xxxxxxxxxxx> -- Best regards - Freundliche Grüsse - Meilleures salutations Senior Development Engineer, Igor Opaniuk Toradex AG Altsagenstrasse 5 | 6048 Horw/Luzern | Switzerland | T: +41 41 500 48 00 (main line)
