[PATCH v2 2/3] ASoC: imx-rpmsg: Support headphone jack detection

[Chancel Liu]

Add headphone jack detection support for i.MX RPMSG audio cards.
When the "hp-det-gpios" property is present in the device tree node,
use simple_util_init_jack() from the ASoC simple card utilities to
register a headphone jack with GPIO-based insertion detection.

Signed-off-by: Chancel Liu <chancel.liu at nxp.com>
---
 sound/soc/fsl/Kconfig     |  1 +
 sound/soc/fsl/imx-rpmsg.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index ae8774e11873..8ae59c094878 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -358,6 +358,7 @@ config SND_SOC_IMX_RPMSG
 	depends on OF && I2C
 	select SND_SOC_IMX_PCM_RPMSG
 	select SND_SOC_IMX_AUDIO_RPMSG
+	select SND_SIMPLE_CARD_UTILS
 	help
 	  SoC Audio support for i.MX boards with rpmsg.
 	  There should be rpmsg devices defined in other core (M core)
diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c
index fd4624786b62..48fe471499ba 100644
--- a/sound/soc/fsl/imx-rpmsg.c
+++ b/sound/soc/fsl/imx-rpmsg.c
@@ -12,6 +12,7 @@
 #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 {
@@ -19,6 +20,7 @@ struct imx_rpmsg {
 	struct snd_soc_card card;
 	unsigned long sysclk;
 	bool lpa;
+	struct simple_util_jack hp_jack;
 };
 
 static struct dev_pm_ops lpa_pm;
@@ -86,6 +88,15 @@ static int imx_rpmsg_late_probe(struct snd_soc_card *card)
 	struct device *dev = card->dev;
 	int ret;
 
+	if (of_property_present(card->dev->of_node, "hp-det-gpios")) {
+		ret = simple_util_init_jack(card, &data->hp_jack,
+					    1, NULL, "Headphone Jack");
+		if (ret) {
+			dev_err(dev, "failed to init hp jack\n");
+			return ret;
+		}
+	}
+
 	if (data->lpa) {
 		struct device_node *codec_np;
 		struct device_driver *codec_drv;
-- 
2.50.1