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Date: Fri, 31 Aug 2018 09:47:13 -0500
From: "Andrew F. Davis" <afd@...com>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>
CC: <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
"Andrew F . Davis" <afd@...com>
Subject: [PATCH v2 1/2] ASoC: codecs: tas5720: add TAS5722 specific volume control
From: Andreas Dannenberg <dannenberg@...com>
The TAS5722 supports modifying volume in 0.25dB steps (as opposed to
0.5dB steps on the TAS5720). Introduce a custom mixer control that
allows taking advantage of this finer output volume granularity.
Also add custom getters/setters for access as the TAS5722 digital volume
controls are split over two registers.
Signed-off-by: Andreas Dannenberg <dannenberg@...com>
Signed-off-by: Andrew F. Davis <afd@...com>
---
Changes from v1:
- Revise commit message
- codec -> component
sound/soc/codecs/tas5720.c | 88 ++++++++++++++++++++++++++++++++++----
1 file changed, 80 insertions(+), 8 deletions(-)
diff --git a/sound/soc/codecs/tas5720.c b/sound/soc/codecs/tas5720.c
index ae3d032ac35a..3c469112477a 100644
--- a/sound/soc/codecs/tas5720.c
+++ b/sound/soc/codecs/tas5720.c
@@ -485,15 +485,56 @@ static const DECLARE_TLV_DB_RANGE(dac_analog_tlv,
);
/*
- * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that
- * setting the gain below -100 dB (register value <0x7) is effectively a MUTE
- * as per device datasheet.
+ * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB or 0.25 dB steps
+ * depending on the device. Note that setting the gain below -100 dB
+ * (register value <0x7) is effectively a MUTE as per device datasheet.
+ *
+ * Note that for the TAS5722 the digital volume controls are actually split
+ * over two registers, so we need custom getters/setters for access.
*/
-static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0);
+static DECLARE_TLV_DB_SCALE(tas5720_dac_tlv, -10350, 50, 0);
+static DECLARE_TLV_DB_SCALE(tas5722_dac_tlv, -10350, 25, 0);
+
+static int tas5722_volume_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ unsigned int val;
+
+ snd_soc_component_read(component, TAS5720_VOLUME_CTRL_REG, &val);
+ ucontrol->value.integer.value[0] = val << 1;
+
+ snd_soc_component_read(component, TAS5722_DIGITAL_CTRL2_REG, &val);
+ ucontrol->value.integer.value[0] |= val & TAS5722_VOL_CONTROL_LSB;
+
+ return 0;
+}
+
+static int tas5722_volume_set(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ unsigned int sel = ucontrol->value.integer.value[0];
+
+ snd_soc_component_write(component, TAS5720_VOLUME_CTRL_REG, sel >> 1);
+ snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG,
+ TAS5722_VOL_CONTROL_LSB, sel);
+
+ return 0;
+}
static const struct snd_kcontrol_new tas5720_snd_controls[] = {
SOC_SINGLE_TLV("Speaker Driver Playback Volume",
- TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, dac_tlv),
+ TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, tas5720_dac_tlv),
+ SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
+ TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
+};
+
+static const struct snd_kcontrol_new tas5722_snd_controls[] = {
+ SOC_SINGLE_EXT_TLV("Speaker Driver Playback Volume",
+ 0, 0, 511, 0,
+ tas5722_volume_get, tas5722_volume_set,
+ tas5722_dac_tlv),
SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
};
@@ -527,6 +568,23 @@ static const struct snd_soc_component_driver soc_component_dev_tas5720 = {
.non_legacy_dai_naming = 1,
};
+static const struct snd_soc_component_driver soc_component_dev_tas5722 = {
+ .probe = tas5720_codec_probe,
+ .remove = tas5720_codec_remove,
+ .suspend = tas5720_suspend,
+ .resume = tas5720_resume,
+ .controls = tas5722_snd_controls,
+ .num_controls = ARRAY_SIZE(tas5722_snd_controls),
+ .dapm_widgets = tas5720_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets),
+ .dapm_routes = tas5720_audio_map,
+ .num_dapm_routes = ARRAY_SIZE(tas5720_audio_map),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
/* PCM rates supported by the TAS5720 driver */
#define TAS5720_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
@@ -613,9 +671,23 @@ static int tas5720_probe(struct i2c_client *client,
dev_set_drvdata(dev, data);
- ret = devm_snd_soc_register_component(&client->dev,
- &soc_component_dev_tas5720,
- tas5720_dai, ARRAY_SIZE(tas5720_dai));
+ switch (id->driver_data) {
+ case TAS5720:
+ ret = devm_snd_soc_register_component(&client->dev,
+ &soc_component_dev_tas5720,
+ tas5720_dai,
+ ARRAY_SIZE(tas5720_dai));
+ break;
+ case TAS5722:
+ ret = devm_snd_soc_register_component(&client->dev,
+ &soc_component_dev_tas5722,
+ tas5720_dai,
+ ARRAY_SIZE(tas5720_dai));
+ break;
+ default:
+ dev_err(dev, "unexpected private driver data\n");
+ return -EINVAL;
+ }
if (ret < 0) {
dev_err(dev, "failed to register component: %d\n", ret);
return ret;
--
2.18.0
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