ASoC: rk3399-gru-sound: Map missing Line Out jack kcontrol

Commit d0508b4f ("ASoC: rk3399_gru_sound: Add DAPM pins, kcontrols
for jack detection") maps kcontrols for Headphones and Headset Mic jacks
for this driver so that PulseAudio and PipeWire can handle insertion
events for these peripherals.

The DA7219 codec used here can also distinguish between Headphone and
Line Out connections that go into the same physical port. Expose the
latter to userspace as a kcontrol as well and add the necessary widget.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Link: https://lore.kernel.org/r/20230802175737.263412-24-alpernebiyasak@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/rockchip/rk3399_gru_sound.c

@@ -41,13 +41,17 @@ static struct snd_soc_jack_pin rockchip_sound_jack_pins[] = {
 		.pin = "Headset Mic",
 		.mask = SND_JACK_MICROPHONE,
 	},
-
+	{
+		.pin = "Line Out",
+		.mask = SND_JACK_LINEOUT,
+	},
 };
 
 static const struct snd_soc_dapm_widget rockchip_dapm_widgets[] = {
 	SND_SOC_DAPM_HP("Headphones", NULL),
 	SND_SOC_DAPM_SPK("Speakers", NULL),
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
+	SND_SOC_DAPM_LINE("Line Out", NULL),
 	SND_SOC_DAPM_MIC("Int Mic", NULL),
 	SND_SOC_DAPM_LINE("HDMI", NULL),
 };
@@ -56,6 +60,7 @@ static const struct snd_kcontrol_new rockchip_controls[] = {
 	SOC_DAPM_PIN_SWITCH("Headphones"),
 	SOC_DAPM_PIN_SWITCH("Speakers"),
 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
+	SOC_DAPM_PIN_SWITCH("Line Out"),
 	SOC_DAPM_PIN_SWITCH("Int Mic"),
 	SOC_DAPM_PIN_SWITCH("HDMI"),
 };