aoc/alsa: add mixer control to mmap record gain

Usage example (range: -300 to 0 dB):
    tinymix 'Mmap Record Gain' -- 0
    tinymix 'Mmap Record Gain' -- -300

Bug: 231630423
Signed-off-by: yixuanjiang <yixuanjiang@google.com>
Change-Id: I71dfe83bf75b84b21b131d842bd7920e1e0940d4

3 files changed, 90 insertions, 0 deletions

diff --git a/alsa/aoc_alsa.h b/alsa/aoc_alsa.h
index 707fff3..cfe58d0 100755
--- a/alsa/aoc_alsa.h
+++ b/alsa/aoc_alsa.h
@@ -339,6 +339,8 @@ int aoc_mic_dc_blocker_set(struct aoc_chip *chip, int enable);
 
 int aoc_mic_record_gain_get(struct aoc_chip *chip, long *val);
 int aoc_mic_record_gain_set(struct aoc_chip *chip, long val);
+int aoc_mmap_record_gain_get(struct aoc_chip *chip, long *val);
+int aoc_mmap_record_gain_set(struct aoc_chip *chip, long val);
 int aoc_audio_capture_mic_prepare(struct aoc_chip *chip);
 int aoc_audio_capture_mic_close(struct aoc_chip *chip);
 int aoc_audio_capture_active_stream_num(struct aoc_chip *chip);
diff --git a/alsa/aoc_alsa_ctl.c b/alsa/aoc_alsa_ctl.c
index 1eecffd..368e213 100755
--- a/alsa/aoc_alsa_ctl.c
+++ b/alsa/aoc_alsa_ctl.c
@@ -17,6 +17,9 @@
 #define AOC_MIC_RECORD_GAIN_IN_DB_MIN -40
 #define AOC_MIC_RECORD_GAIN_IN_DB_MAX 30
 
+#define MMAP_MIC_RECORD_GAIN_IN_DB_MIN -300
+#define MMAP_MIC_RECORD_GAIN_IN_DB_MAX 0
+
 #define COMPRE_OFFLOAD_GAIN_MIN 0
 #define COMPRE_OFFLOAD_GAIN_MAX 8388608 /* 2^23 = 8388608 */
 
@@ -510,6 +513,41 @@ static int mic_record_gain_ctl_get(struct snd_kcontrol *kcontrol,
 	return err;
 }
 
+static int mmap_record_gain_ctl_set(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
+{
+	struct aoc_chip *chip = snd_kcontrol_chip(kcontrol);
+	int val, err = 0;
+
+	if (mutex_lock_interruptible(&chip->audio_mutex))
+		return -EINTR;
+
+	val = ucontrol->value.integer.value[0];
+	err = aoc_mmap_record_gain_set(chip, val);
+	if (err < 0)
+		pr_err("ERR:%d mmap record gain set to %d fail\n", err, val);
+
+	mutex_unlock(&chip->audio_mutex);
+	return err;
+}
+
+static int mmap_record_gain_ctl_get(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
+{
+	struct aoc_chip *chip = snd_kcontrol_chip(kcontrol);
+	int err = 0;
+
+	if (mutex_lock_interruptible(&chip->audio_mutex))
+		return -EINTR;
+
+	err = aoc_mmap_record_gain_get(chip, &ucontrol->value.integer.value[0]);
+	if (err < 0)
+		pr_err("ERR:%d mmap record gain get fail\n", err);
+
+	mutex_unlock(&chip->audio_mutex);
+	return err;
+}
+
 static int lvm_enable_ctl_set(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 {
 	struct aoc_chip *chip = snd_kcontrol_chip(kcontrol);
@@ -1937,6 +1975,12 @@ static struct snd_kcontrol_new snd_aoc_ctl[] = {
 					  AOC_MIC_RECORD_GAIN_IN_DB_MAX, 1, mic_record_gain_ctl_get,
 					  mic_record_gain_ctl_set, NULL),
 
+	SOC_SINGLE_RANGE_EXT_TLV_modified("Mmap Record Gain", SND_SOC_NOPM, 0,
+					  MMAP_MIC_RECORD_GAIN_IN_DB_MIN,
+					  MMAP_MIC_RECORD_GAIN_IN_DB_MAX, 1,
+					  mmap_record_gain_ctl_get,
+					  mmap_record_gain_ctl_set, NULL),
+
 	SOC_SINGLE_EXT("Compress Offload Volume", SND_SOC_NOPM, 0, 100, 0, compr_offload_volume_get,
 		       compr_offload_volume_set),
 
diff --git a/alsa/aoc_alsa_hw.c b/alsa/aoc_alsa_hw.c
index 5ac2987..8aaf307 100755
--- a/alsa/aoc_alsa_hw.c
+++ b/alsa/aoc_alsa_hw.c
@@ -2078,6 +2078,50 @@ int aoc_mic_record_gain_set(struct aoc_chip *chip, long val)
 	return 0;
 }
 
+int aoc_mmap_record_gain_get(struct aoc_chip *chip, long *val)
+{
+	int err;
+	int cmd_id, block, component, key, value;
+
+	cmd_id = CMD_AUDIO_INPUT_GET_PARAMETER_ID;
+	block = 136;
+	component = 0;
+	key = 16; /* for dB */
+
+	/* Send cmd to AOC */
+	err = aoc_audio_get_parameters(cmd_id, block, component, key, &value, chip);
+	if (err < 0) {
+		pr_err("ERR:%d mmap mic record gain get\n", err);
+		return err;
+	}
+
+	if (val)
+		*val = value;
+
+	return 0;
+}
+
+int aoc_mmap_record_gain_set(struct aoc_chip *chip, long val)
+{
+	int err;
+	int cmd_id, block, component, key, value;
+
+	cmd_id = CMD_AUDIO_INPUT_SET_PARAMETER_ID;
+	block = 136;
+	component = 0;
+	key = 16; /* for dB */
+	value = val;
+
+	/* Send cmd to AOC */
+	err = aoc_audio_set_parameters(cmd_id, block, component, key, value, chip);
+	if (err < 0) {
+		pr_err("ERR:%d mmap record gain set\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
 int aoc_audio_capture_eraser_enable(struct aoc_chip *chip, long enable)
 {
 	int cmd_id, err = 0;