From: Ben Zhang <benzh@xxxxxxxxxxxx>
Add a DAPM audio path from "DMIC L1" to "DSP Buffer" so that
when hotwording is enabled, DAPM does not power off the codec
with SND_SOC_BIAS_OFF.
Signed-off-by: Ben Zhang <benzh@xxxxxxxxxxxx>
Signed-off-by: Curtis Malainey <cujomalainey@xxxxxxxxxxxx>
---
sound/soc/codecs/rt5677.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index 48955b22262fa..abb83f2e9974f 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -707,6 +707,15 @@ static void rt5677_set_dsp_mode(struct rt5677_priv *rt5677, bool on)
static unsigned int rt5677_set_vad_source(struct rt5677_priv *rt5677)
{
+ struct snd_soc_dapm_context *dapm =
+ snd_soc_component_get_dapm(rt5677->component);
+ /* The hotword audio path is from "DMIC L1" to "DSP Buffer".
+ * "DSP Buffer" is then connected to "DSP Capture" which is the
+ * rt5677-dsp-cpu-dai with a PCM interface in rt5677-spi.
+ */
+ snd_soc_dapm_enable_pin(dapm, "DMIC L1");
+ snd_soc_dapm_sync(dapm);
+
/* DMIC1 power = enabled
* DMIC CLK = 256 * fs / 12
*/
@@ -3167,6 +3176,7 @@ static const struct snd_soc_dapm_widget rt5677_dapm_widgets[] = {
SND_SOC_DAPM_AIF_OUT("AIF4TX", "AIF4 Capture", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("SLBRX", "SLIMBus Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_OUT("SLBTX", "SLIMBus Capture", 0, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_AIF_OUT("DSPTX", "DSP Buffer", 0, SND_SOC_NOPM, 0, 0),
/* Sidetone Mux */
SND_SOC_DAPM_MUX("Sidetone Mux", SND_SOC_NOPM, 0, 0,
@@ -3701,11 +3711,24 @@ static const struct snd_soc_dapm_route rt5677_dapm_routes[] = {
{ "SLBTX", NULL, "SLB ADC3 Mux" },
{ "SLBTX", NULL, "SLB ADC4 Mux" },
+ { "DSPTX", NULL, "IB01 Bypass Mux" },
+
{ "IB01 Mux", "IF1 DAC 01", "IF1 DAC01" },
{ "IB01 Mux", "IF2 DAC 01", "IF2 DAC01" },
{ "IB01 Mux", "SLB DAC 01", "SLB DAC01" },
{ "IB01 Mux", "STO1 ADC MIX", "Stereo1 ADC MIX" },
- { "IB01 Mux", "VAD ADC/DAC1 FS", "DAC1 FS" },
+ /* The IB01 Mux controls the source for InBound0 and InBound1.
+ * When the mux option "VAD ADC/DAC1 FS" is selected, "VAD ADC" goes to
+ * InBound0 and "DAC1 FS" goes to InBound1. "VAD ADC" is used for
+ * hotwording. "DAC1 FS" is not used currently.
+ *
+ * Creating a common widget node for "VAD ADC" + "DAC1 FS" and
+ * connecting the common widget to IB01 Mux causes the issue where
+ * there is an active path going from system playback -> "DAC1 FS" ->
+ * IB01 Mux -> DSP Buffer -> hotword stream. This wrong path confuses
+ * DAPM. Therefore "DAC1 FS" is ignored for now.
+ */
+ { "IB01 Mux", "VAD ADC/DAC1 FS", "VAD ADC Mux" },
{ "IB01 Bypass Mux", "Bypass", "IB01 Mux" },
{ "IB01 Bypass Mux", "Pass SRC", "IB01 Mux" },
--
2.23.0.866.gb869b98d4c-goog
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