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complete_path例子例子

admin 11月 14, 2020 0

complete-path可以知道：
1. snd_soc_dapm_dac/ snd_soc_dapm_aif_in/ snd_soc_dapm_input/
snd_soc_dapm_vmid/ snd_soc_dapm_mic/ snd_soc_dapm_line都属于input_ep
2. snd_soc_dapm_adc/ snd_soc_dapm_aif_out/ snd_soc_dapm_output/
snd_soc_dapm_hp/ snd_soc_dapm_spk/ snd_soc_dapm_line都属于output_ep

例子

input_ep

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{	.id = snd_soc_dapm_input, .name = wname, .kcontrol_news = NULL, 
	.num_kcontrols = 0, .reg = SND_SOC_NOPM }

output_ep

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#define SND_SOC_DAPM_ADC(wname, stname, wreg, wshift, winvert) 
{	.id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, 
	.shift = wshift, .invert = winvert}

static const struct  wm8960_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("LINPUT1"),
	SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER1, 3, 0),
};

path

“sink”, “control”, “source”

static const struct snd_soc_dapm_route audio_paths[] = {
	{ "Left Input Mixer", NULL, "LINPUT1", },
	{ "Left ADC", NULL, "Left Input Mixer" },
};

所以：
LINPUT1 -> Left Input Mixer -> Left ADC就组成了一条complate path。