summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/sgtl5000.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/codecs/sgtl5000.c')
-rw-r--r--sound/soc/codecs/sgtl5000.c56
1 files changed, 47 insertions, 9 deletions
diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 3593a1496056..e673f6ceb521 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -948,7 +948,7 @@ static int sgtl5000_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
- if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(
ARRAY_SIZE(sgtl5000->supplies),
sgtl5000->supplies);
@@ -979,7 +979,6 @@ static int sgtl5000_set_bias_level(struct snd_soc_codec *codec,
break;
}
- codec->dapm.bias_level = level;
return 0;
}
@@ -1092,6 +1091,19 @@ static bool sgtl5000_readable(struct device *dev, unsigned int reg)
}
/*
+ * This precalculated table contains all (vag_val * 100 / lo_calcntrl) results
+ * to select an appropriate lo_vol_* in SGTL5000_CHIP_LINE_OUT_VOL
+ * The calculatation was done for all possible register values which
+ * is the array index and the following formula: 10^((idx−15)/40) * 100
+ */
+static const u8 vol_quot_table[] = {
+ 42, 45, 47, 50, 53, 56, 60, 63,
+ 67, 71, 75, 79, 84, 89, 94, 100,
+ 106, 112, 119, 126, 133, 141, 150, 158,
+ 168, 178, 188, 200, 211, 224, 237, 251
+};
+
+/*
* sgtl5000 has 3 internal power supplies:
* 1. VAG, normally set to vdda/2
* 2. charge pump, set to different value
@@ -1111,6 +1123,10 @@ static int sgtl5000_set_power_regs(struct snd_soc_codec *codec)
u16 ana_pwr;
u16 lreg_ctrl;
int vag;
+ int lo_vag;
+ int vol_quot;
+ int lo_vol;
+ size_t i;
struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec);
vdda = regulator_get_voltage(sgtl5000->supplies[VDDA].consumer);
@@ -1198,23 +1214,45 @@ static int sgtl5000_set_power_regs(struct snd_soc_codec *codec)
SGTL5000_ANA_GND_MASK, vag << SGTL5000_ANA_GND_SHIFT);
/* set line out VAG to vddio / 2, in range (0.8v, 1.675v) */
- vag = vddio / 2;
- if (vag <= SGTL5000_LINE_OUT_GND_BASE)
- vag = 0;
- else if (vag >= SGTL5000_LINE_OUT_GND_BASE +
+ lo_vag = vddio / 2;
+ if (lo_vag <= SGTL5000_LINE_OUT_GND_BASE)
+ lo_vag = 0;
+ else if (lo_vag >= SGTL5000_LINE_OUT_GND_BASE +
SGTL5000_LINE_OUT_GND_STP * SGTL5000_LINE_OUT_GND_MAX)
- vag = SGTL5000_LINE_OUT_GND_MAX;
+ lo_vag = SGTL5000_LINE_OUT_GND_MAX;
else
- vag = (vag - SGTL5000_LINE_OUT_GND_BASE) /
+ lo_vag = (lo_vag - SGTL5000_LINE_OUT_GND_BASE) /
SGTL5000_LINE_OUT_GND_STP;
snd_soc_update_bits(codec, SGTL5000_CHIP_LINE_OUT_CTRL,
SGTL5000_LINE_OUT_CURRENT_MASK |
SGTL5000_LINE_OUT_GND_MASK,
- vag << SGTL5000_LINE_OUT_GND_SHIFT |
+ lo_vag << SGTL5000_LINE_OUT_GND_SHIFT |
SGTL5000_LINE_OUT_CURRENT_360u <<
SGTL5000_LINE_OUT_CURRENT_SHIFT);
+ /*
+ * Set lineout output level in range (0..31)
+ * the same value is used for right and left channel
+ *
+ * Searching for a suitable index solving this formula:
+ * idx = 40 * log10(vag_val / lo_cagcntrl) + 15
+ */
+ vol_quot = (vag * 100) / lo_vag;
+ lo_vol = 0;
+ for (i = 0; i < ARRAY_SIZE(vol_quot_table); i++) {
+ if (vol_quot >= vol_quot_table[i])
+ lo_vol = i;
+ else
+ break;
+ }
+
+ snd_soc_update_bits(codec, SGTL5000_CHIP_LINE_OUT_VOL,
+ SGTL5000_LINE_OUT_VOL_RIGHT_MASK |
+ SGTL5000_LINE_OUT_VOL_LEFT_MASK,
+ lo_vol << SGTL5000_LINE_OUT_VOL_RIGHT_SHIFT |
+ lo_vol << SGTL5000_LINE_OUT_VOL_LEFT_SHIFT);
+
return 0;
}