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Date: Mon, 11 Jun 2018 12:25:30 +0200
From: Pavel Machek <pavel@....cz>
To: kernel list <linux-kernel@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-omap@...r.kernel.org, tony@...mide.com, sre@...nel.org,
nekit1000@...il.com, mpartap@....net, merlijn@...zup.org,
alsa-devel@...a-project.org, tiwai@...e.com, perex@...ex.cz,
broonie@...nel.org, lgirdwood@...il.com
Subject: handling voice calls in ALSA soc (on Droid 4)
Hi!
During voice call, I need audio components to be active "as if" aplay
or arecord was running, because modem needs to comunicate with speaker
and microphone.
I hacked something up, but... I believe I'll need help here. Look at
"enable_call" for "interesting" stuff I had to do.
...and also. What is right interface for this? Mixer component that
says if voice call is active or not?
Any ideas?
Thanks,
Pavel
(edited).
+++ b/sound/soc/codecs/cpcap.c
@@ -330,6 +330,10 @@ static const char * const cpcap_in_left_mux_texts[] = {
"Off", "Mic 2", "Ext Left"
};
+static const char * const cpcap_mode_texts[] = {
+ "Normal", "Handsfree", "Call",
+};
+
/*
* input muxes use unusual register layout, so that we need to use custom
* getter/setter methods
@@ -354,6 +358,8 @@ static SOC_ENUM_SINGLE_DECL(cpcap_hs_l_mux_enum, 0, 6, cpcap_out_mux_texts);
static SOC_ENUM_SINGLE_DECL(cpcap_emu_l_mux_enum, 0, 7, cpcap_out_mux_texts);
static SOC_ENUM_SINGLE_DECL(cpcap_emu_r_mux_enum, 0, 8, cpcap_out_mux_texts);
+static SOC_ENUM_SINGLE_DECL(cpcap_mode_enum, 0, 9, cpcap_mode_texts);
+
static int cpcap_output_mux_get_enum(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@@ -442,6 +448,211 @@ static int cpcap_output_mux_put_enum(struct snd_kcontrol *kcontrol,
return 0;
}
+static int mode;
+
+static int cpcap_mode_get_enum(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ ucontrol->value.enumerated.item[0] = mode;
+
+ return 0;
+}
+
+static struct snd_soc_dai *voice_codec_dai_hack;
+
+static int enable_call(struct snd_soc_component *component, int on)
+{
+ struct cpcap_audio *cpcap = snd_soc_component_get_drvdata(component);
+ struct snd_soc_pcm_runtime *rt;
+
+ rt = snd_soc_get_pcm_runtime(component->card, "40126000.mcbsp-cpcap-voice");
+ printk("num_dai: %d, got runtime %lx\n", component->num_dai, rt);
+
+ if (rt) {
+ snd_soc_dapm_stream_event(rt, SNDRV_PCM_STREAM_PLAYBACK, SND_SOC_DAPM_STREAM_START);
+ snd_soc_dapm_stream_event(rt, SNDRV_PCM_STREAM_CAPTURE, SND_SOC_DAPM_STREAM_START);
+ }
+
+ cpcap_set_sysclk(cpcap, CPCAP_DAI_VOICE, 1, 19200000);
+ cpcap_set_samprate(cpcap, CPCAP_DAI_VOICE, 8000);
+
+ cpcap_voice_set_dai_fmt(voice_codec_dai_hack,
+ SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM );
+
+ return 0;
+}
+
+static int cpcap_mode_put_enum(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_dapm_kcontrol_component(kcontrol);
+ struct cpcap_audio *cpcap = snd_soc_component_get_drvdata(component);
+ unsigned int muxval = ucontrol->value.enumerated.item[0];
+
+ printk("Requested mode %d\n", muxval);
+
+ mode = muxval;
+
+ switch (muxval) {
+ case 1:
+ enable_call(component, 1);
+ break;
+ case 2:
+ enable_call(component, 1);
+
+ regmap_assert(cpcap, CPCAP_REG_TXI, 0xffff, 0x0cc6);
...
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
static int cpcap_input_right_mux_get_enum(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@@ -630,6 +841,10 @@ static const struct snd_kcontrol_new cpcap_earpiece_mux =
SOC_DAPM_ENUM_EXT("Earpiece", cpcap_earpiece_mux_enum,
cpcap_output_mux_get_enum, cpcap_output_mux_put_enum);
+static const struct snd_kcontrol_new cpcap_mode =
+ SOC_DAPM_ENUM_EXT("Mode", cpcap_mode_enum,
+ cpcap_mode_get_enum, cpcap_mode_put_enum);
+
static const struct snd_kcontrol_new cpcap_hifi_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("HiFi Mono Playback Switch",
CPCAP_REG_RXSDOA, CPCAP_BIT_MONO_DAC1, 1, 0),
@@ -771,6 +986,9 @@ static const struct snd_soc_dapm_widget cpcap_dapm_widgets[] = {
SND_SOC_DAPM_MUX("EMU Left Playback Route", SND_SOC_NOPM, 0, 0,
&cpcap_emu_left_mux),
+ SND_SOC_DAPM_MUX("Mode", SND_SOC_NOPM, 0, 0,
+ &cpcap_mode),
+
/* Output Amplifier */
SND_SOC_DAPM_PGA("Earpiece PGA",
CPCAP_REG_RXOA, CPCAP_BIT_A1_EAR_EN, 0, NULL, 0),
@@ -791,7 +1009,7 @@ static const struct snd_soc_dapm_widget cpcap_dapm_widgets[] = {
SND_SOC_DAPM_PGA("EMU Left PGA",
CPCAP_REG_RXOA, CPCAP_BIT_EMU_SPKR_L_EN, 0, NULL, 0),
- /* Headet Charge Pump */
+ /* Headset Charge Pump */
SND_SOC_DAPM_SUPPLY("Headset Charge Pump",
CPCAP_REG_RXOA, CPCAP_BIT_ST_HS_CP_EN, 0, NULL, 0),
@@ -1304,6 +1525,7 @@ static int cpcap_voice_set_dai_fmt(struct snd_soc_dai *codec_dai,
u16 val = 0x0000;
int err;
+ voice_codec_dai_hack = codec_dai;
dev_dbg(component->dev, "Voice setup dai format (%08x)", fmt);
/*
@@ -1343,10 +1565,7 @@ static int cpcap_voice_set_dai_fmt(struct snd_soc_dai *codec_dai,
break;
}
- if (val & BIT(CPCAP_BIT_CLK_INV))
- val &= ~BIT(CPCAP_BIT_CLK_INV);
- else
- val |= BIT(CPCAP_BIT_CLK_INV);
+ val ^= BIT(CPCAP_BIT_CLK_INV);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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