From a8de4e09e248548962210edbef3f39a93e99ea94 Mon Sep 17 00:00:00 2001
From: Shunhua Lan <lsh@rock-chips.com>
Date: Thu, 13 Oct 2022 12:21:53 +0000
Subject: [PATCH] media: rockchip: hdmirx: Add extcon support

Signed-off-by: Shunhua Lan <lsh@rock-chips.com>
Change-Id: Ia19b8f7230af515b8dbc7bb953d03e8e5dbb1f7a
---
 .../platform/rockchip/hdmirx/rk_hdmirx.c      | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/media/platform/rockchip/hdmirx/rk_hdmirx.c b/drivers/media/platform/rockchip/hdmirx/rk_hdmirx.c
index 18b06d4dcb03..1c0705b2ae5d 100644
--- a/drivers/media/platform/rockchip/hdmirx/rk_hdmirx.c
+++ b/drivers/media/platform/rockchip/hdmirx/rk_hdmirx.c
@@ -11,6 +11,7 @@
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
+#include <linux/extcon-provider.h>
 #include <linux/fs.h>
 #include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
@@ -195,6 +196,7 @@ struct rk_hdmirx_dev {
 	struct dentry *debugfs_dir;
 	struct freq_qos_request min_sta_freq_req;
 	struct hdmirx_audiostate audio_state;
+	struct extcon_dev *extcon;
 	struct hdmirx_cec *cec;
 	struct mutex stream_lock;
 	struct mutex work_lock;
@@ -245,6 +247,11 @@ struct rk_hdmirx_dev {
 	spinlock_t rst_lock;
 };
 
+static const unsigned int hdmirx_extcon_cable[] = {
+	EXTCON_JACK_VIDEO_IN,
+	EXTCON_NONE,
+};
+
 static bool tx_5v_power_present(struct rk_hdmirx_dev *hdmirx_dev);
 static void hdmirx_set_fmt(struct hdmirx_stream *stream,
 		struct v4l2_pix_format_mplane *pixm, bool try);
@@ -2672,12 +2679,14 @@ static void hdmirx_plugin(struct rk_hdmirx_dev *hdmirx_dev)
 	}
 	hdmirx_dma_config(hdmirx_dev);
 	hdmirx_interrupts_setup(hdmirx_dev, true);
+	extcon_set_state_sync(hdmirx_dev->extcon, EXTCON_JACK_VIDEO_IN, true);
 	hdmirx_audio_handle_plugged_change(hdmirx_dev, 1);
 }
 
 static void hdmirx_plugout(struct rk_hdmirx_dev *hdmirx_dev)
 {
 	hdmirx_audio_handle_plugged_change(hdmirx_dev, 0);
+	extcon_set_state_sync(hdmirx_dev->extcon, EXTCON_JACK_VIDEO_IN, false);
 	hdmirx_update_bits(hdmirx_dev, SCDC_CONFIG, POWERPROVIDED, 0);
 	hdmirx_interrupts_setup(hdmirx_dev, false);
 	hdmirx_hpd_ctrl(hdmirx_dev, false);
@@ -4102,6 +4111,19 @@ static int hdmirx_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unreg_video_dev;
 
+	hdmirx_dev->extcon = devm_extcon_dev_allocate(dev, hdmirx_extcon_cable);
+	if (IS_ERR(hdmirx_dev->extcon)) {
+		ret = PTR_ERR(hdmirx_dev->extcon);
+		dev_err(&pdev->dev, "allocate extcon failed\n");
+		goto err_unreg_video_dev;
+	}
+
+	ret = devm_extcon_dev_register(dev, hdmirx_dev->extcon);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register extcon: %d\n", ret);
+		goto err_unreg_video_dev;
+	}
+
 	irq = gpiod_to_irq(hdmirx_dev->hdmirx_det_gpio);
 	if (irq < 0) {
 		dev_err(dev, "failed to get hdmirx-det gpio irq\n");