LF-4175-6: ASoC: imx-rpmsg: add dummy headphone Jack for pulseaudio

with rpmsg devices, there is not headphone plug event on A core side,
but pulseaudio would mute the headphone if there is not headphone
Jack event, so add dummy headphone Jack, which emulates the headphone
is plugged in always.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Peng Zhang <peng.zhang_8@nxp.com>

sound/soc/fsl/imx-rpmsg.c

@@ -14,11 +14,13 @@
 #include <sound/control.h>
 #include <sound/pcm_params.h>
 #include <sound/soc-dapm.h>
+#include <sound/simple_card_utils.h>
 #include "imx-pcm-rpmsg.h"
 
 struct imx_rpmsg {
 	struct snd_soc_dai_link dai;
 	struct snd_soc_card card;
+	struct asoc_simple_jack hp_jack;
 };
 
 static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
@@ -137,6 +139,11 @@ static int imx_rpmsg_probe(struct platform_device *pdev)
 		goto fail;
 	}
 
+	data->hp_jack.pin.pin = "Headphone Jack";
+	data->hp_jack.pin.mask = SND_JACK_HEADPHONE;
+	snd_soc_card_jack_new(&data->card, "Headphone Jack", SND_JACK_HEADPHONE,
+			      &data->hp_jack.jack, &data->hp_jack.pin, 1);
+	snd_soc_jack_report(&data->hp_jack.jack, SND_JACK_HEADPHONE, SND_JACK_HEADPHONE);
 fail:
 	pdev->dev.of_node = NULL;
 	return ret;