1 files changed, 88 insertions, 7 deletions

diff --git a/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c b/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
index 58276a48112e..e3d98d78fc40 100644
--- a/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
+++ b/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
@@ -15,12 +15,17 @@
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/gpio/consumer.h>
+#include <linux/mutex.h>
 
 #include "../dss/omapdss.h"
 
 struct panel_drv_data {
 	struct omap_dss_device dssdev;
 	struct omap_dss_device *in;
+	void (*hpd_cb)(void *cb_data, enum drm_connector_status status);
+	void *hpd_cb_data;
+	bool hpd_enabled;
+	struct mutex hpd_lock;
 
 	struct gpio_desc *ct_cp_hpd_gpio;
 	struct gpio_desc *ls_oe_gpio;
@@ -46,6 +51,8 @@ static int tpd_connect(struct omap_dss_device *dssdev,
 	dssdev->dst = dst;
 
 	gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
+	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);
+
 	/* DC-DC converter needs at max 300us to get to 90% of 5V */
 	udelay(300);
 
@@ -64,6 +71,7 @@ static void tpd_disconnect(struct omap_dss_device *dssdev,
 		return;
 
 	gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);
+	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
 
 	dst->src = NULL;
 	dssdev->dst = NULL;
@@ -141,25 +149,65 @@ static int tpd_read_edid(struct omap_dss_device *dssdev,
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	struct omap_dss_device *in = ddata->in;
-	int r;
 
 	if (!gpiod_get_value_cansleep(ddata->hpd_gpio))
 		return -ENODEV;
 
-	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);
+	return in->ops.hdmi->read_edid(in, edid, len);
+}
 
-	r = in->ops.hdmi->read_edid(in, edid, len);
+static bool tpd_detect(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+	bool connected = gpiod_get_value_cansleep(ddata->hpd_gpio);
 
-	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
+	if (!connected && in->ops.hdmi->lost_hotplug)
+		in->ops.hdmi->lost_hotplug(in);
+	return connected;
+}
 
-	return r;
+static int tpd_register_hpd_cb(struct omap_dss_device *dssdev,
+			       void (*cb)(void *cb_data,
+					  enum drm_connector_status status),
+			       void *cb_data)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_cb = cb;
+	ddata->hpd_cb_data = cb_data;
+	mutex_unlock(&ddata->hpd_lock);
+
+	return 0;
 }
 
-static bool tpd_detect(struct omap_dss_device *dssdev)
+static void tpd_unregister_hpd_cb(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 
-	return gpiod_get_value_cansleep(ddata->hpd_gpio);
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_cb = NULL;
+	ddata->hpd_cb_data = NULL;
+	mutex_unlock(&ddata->hpd_lock);
+}
+
+static void tpd_enable_hpd(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_enabled = true;
+	mutex_unlock(&ddata->hpd_lock);
+}
+
+static void tpd_disable_hpd(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_enabled = false;
+	mutex_unlock(&ddata->hpd_lock);
 }
 
 static int tpd_set_infoframe(struct omap_dss_device *dssdev,
@@ -193,10 +241,34 @@ static const struct omapdss_hdmi_ops tpd_hdmi_ops = {
 
 	.read_edid		= tpd_read_edid,
 	.detect			= tpd_detect,
+	.register_hpd_cb	= tpd_register_hpd_cb,
+	.unregister_hpd_cb	= tpd_unregister_hpd_cb,
+	.enable_hpd		= tpd_enable_hpd,
+	.disable_hpd		= tpd_disable_hpd,
 	.set_infoframe		= tpd_set_infoframe,
 	.set_hdmi_mode		= tpd_set_hdmi_mode,
 };
 
+static irqreturn_t tpd_hpd_isr(int irq, void *data)
+{
+	struct panel_drv_data *ddata = data;
+
+	mutex_lock(&ddata->hpd_lock);
+	if (ddata->hpd_enabled && ddata->hpd_cb) {
+		enum drm_connector_status status;
+
+		if (tpd_detect(&ddata->dssdev))
+			status = connector_status_connected;
+		else
+			status = connector_status_disconnected;
+
+		ddata->hpd_cb(ddata->hpd_cb_data, status);
+	}
+	mutex_unlock(&ddata->hpd_lock);
+
+	return IRQ_HANDLED;
+}
+
 static int tpd_probe_of(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
@@ -261,6 +333,15 @@ static int tpd_probe(struct platform_device *pdev)
 
 	ddata->hpd_gpio = gpio;
 
+	mutex_init(&ddata->hpd_lock);
+
+	r = devm_request_threaded_irq(&pdev->dev, gpiod_to_irq(ddata->hpd_gpio),
+		NULL, tpd_hpd_isr,
+		IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+		"tpd12s015 hpd", ddata);
+	if (r)
+		goto err_gpio;
+
 	dssdev = &ddata->dssdev;
 	dssdev->ops.hdmi = &tpd_hdmi_ops;
 	dssdev->dev = &pdev->dev;