ASoC: sun8i-codec: Add missing mixer routes

The sun8i-codec driver provides ALSA controls for enabling/disabling
each of the inputs to the AIF1 Slot 0 and DAC mixers. For two of these
inputs (ADC->DAC and AIF1 DA0->AIF1 AD0), the audio source is
implemented, so the mixer inputs can be used.

However, because the DAPM routes are missing, these mixer inputs only
work when both the source and the mixer happen to be part of other
active audio paths. Adding the appropriate routes makes these ALSA
controls function all of the time.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20200726012557.38282-4-samuel@sholland.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sunxi/sun8i-codec.c

@@ -490,14 +490,20 @@ static const struct snd_soc_dapm_route sun8i_codec_dapm_routes[] = {
 
 	/* DAC Mixer Routes */
 	{ "Left Digital DAC Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", "AIF1 DA0L" },
+	{ "Left Digital DAC Mixer", "ADC Digital DAC Playback Switch", "ADCL" },
+
 	{ "Right Digital DAC Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", "AIF1 DA0R" },
+	{ "Right Digital DAC Mixer", "ADC Digital DAC Playback Switch", "ADCR" },
 
 	/* ADC Routes */
 	{ "AIF1 AD0L", NULL, "Left Digital ADC Mixer" },
 	{ "AIF1 AD0R", NULL, "Right Digital ADC Mixer" },
 
 	/* ADC Mixer Routes */
+	{ "Left Digital ADC Mixer", "AIF1 Slot 0 Digital ADC Capture Switch", "AIF1 DA0L" },
 	{ "Left Digital ADC Mixer", "AIF1 Data Digital ADC Capture Switch", "ADCL" },
+
+	{ "Right Digital ADC Mixer", "AIF1 Slot 0 Digital ADC Capture Switch", "AIF1 DA0R" },
 	{ "Right Digital ADC Mixer", "AIF1 Data Digital ADC Capture Switch", "ADCR" },
 };