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ASoC: twl6040 - Add method to query optimum PDM_DL1 gain

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The DL1 PDM interface adds a little gain depending on the output device.
Add a method to retrieve the gain value for machine driver usage.

Signed-off-by: Liam Girdwood <lrg@ti.com>
This commit is contained in:
Liam Girdwood 2012-01-11 12:43:24 +00:00
parent f75a8ff67d
commit e48b46ba16
2 changed files with 24 additions and 0 deletions
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23
sound/soc/codecs/twl6040.c
View file

@ -33,6 +33,7 @@
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
@ -1012,6 +1013,28 @@ static int twl6040_pll_put_enum(struct snd_kcontrol *kcontrol,
return 0;
}
int twl6040_get_dl1_gain(struct snd_soc_codec *codec)
{
struct snd_soc_dapm_context *dapm = &codec->dapm;
if (snd_soc_dapm_get_pin_status(dapm, "EP"))
return -1; /* -1dB */
if (snd_soc_dapm_get_pin_status(dapm, "HSOR") ||
snd_soc_dapm_get_pin_status(dapm, "HSOL")) {
u8 val = snd_soc_read(codec, TWL6040_REG_HSLCTL);
if (val & TWL6040_HSDACMODE)
/* HSDACL in LP mode */
return -8; /* -8dB */
else
/* HSDACL in HP mode */
return -1; /* -1dB */
}
return 0; /* 0dB */
}
EXPORT_SYMBOL_GPL(twl6040_get_dl1_gain);
int twl6040_get_clk_id(struct snd_soc_codec *codec)
{
struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);

1
sound/soc/codecs/twl6040.h
View file

@ -34,6 +34,7 @@ enum twl6040_trim {
#define TWL6040_HSF_TRIM_LEFT(x) (x & 0x0f)
#define TWL6040_HSF_TRIM_RIGHT(x) ((x >> 4) & 0x0f)
int twl6040_get_dl1_gain(struct snd_soc_codec *codec);
void twl6040_hs_jack_detect(struct snd_soc_codec *codec,
struct snd_soc_jack *jack, int report);
int twl6040_get_clk_id(struct snd_soc_codec *codec);