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ASoC: tas6424: Allow disabling auto diagnostics for faster power-on

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The TAS6424 incorporates both DC-load and AC-load diagnostics which are
used to determine the status of the load. The DC diagnostics runs when any
channel is directed to leave the Hi-Z state and enter the MUTE or PLAY
state.
The DC diagnostics are turned on by default but, if a fast startup without
diagnostics is required, the diagnostics can be disabled using a dedicated
ALSA control.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jean-Jacques Hiblot 2018-05-03 09:36:27 +02:00 committed by Mark Brown
parent a7ea9385d4
commit 396888772a
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
2 changed files with 15 additions and 2 deletions
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11
sound/soc/codecs/tas6424.c
View file

@ -64,6 +64,8 @@ static const struct snd_kcontrol_new tas6424_snd_controls[] = {
TAS6424_CH3_VOL_CTRL, 0, 0xff, 0, dac_tlv),
SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume",
TAS6424_CH4_VOL_CTRL, 0, 0xff, 0, dac_tlv),
SOC_SINGLE_STROBE("Auto Diagnostics Switch", TAS6424_DC_DIAG_CTRL1,
TAS6424_LDGBYPASS_SHIFT, 1),
};
static int tas6424_dac_event(struct snd_soc_dapm_widget *w,
@ -297,6 +299,11 @@ static int tas6424_power_on(struct snd_soc_component *component)
struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);
int ret;
u8 chan_states;
int no_auto_diags = 0;
unsigned int reg_val;
if (!regmap_read(tas6424->regmap, TAS6424_DC_DIAG_CTRL1, &reg_val))
no_auto_diags = reg_val & TAS6424_LDGBYPASS_MASK;
ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies),
tas6424->supplies);
@ -327,8 +334,10 @@ static int tas6424_power_on(struct snd_soc_component *component)
snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, chan_states);
/* any time we come out of HIZ, the output channels automatically run DC
* load diagnostics, wait here until this completes
* load diagnostics if autodiagnotics are enabled. wait here until this
* completes.
*/
if (!no_auto_diags)
msleep(230);
return 0;

4
sound/soc/codecs/tas6424.h
View file

@ -111,6 +111,10 @@
TAS6424_CH3_STATE_DIAG | \
TAS6424_CH4_STATE_DIAG)
/* TAS6424_DC_DIAG_CTRL1 */
#define TAS6424_LDGBYPASS_SHIFT 0
#define TAS6424_LDGBYPASS_MASK BIT(TAS6424_LDGBYPASS_SHIFT)
/* TAS6424_GLOB_FAULT1_REG */
#define TAS6424_FAULT_CLOCK BIT(4)
#define TAS6424_FAULT_PVDD_OV BIT(3)