release/5.2.37/drm-tegra-Use-GPIO-descriptor-API.patch

From 4f26ea64a021fe8d7b486b4db77b5135551e4852 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Wed, 5 Jun 2019 10:46:46 +0200
Subject: [PATCH] drm/tegra: Use GPIO descriptor API

commit bbad640709fd43ff77b8838c409c977c0b28430c upstream.

The legacy GPIO API has long been deprecated. Move the driver over to
the descriptor-based API, which allows us to get rid of some boilerplate
while at it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
index 3844c402ff03..86daa19fcf24 100644
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -124,8 +124,7 @@ struct tegra_output {
 	const struct edid *edid;
 	struct cec_notifier *cec;
 	unsigned int hpd_irq;
-	int hpd_gpio;
-	enum of_gpio_flags hpd_gpio_flags;
+	struct gpio_desc *hpd_gpio;
 
 	struct drm_encoder encoder;
 	struct drm_connector connector;
diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
index 4d450ce8aa86..274cb955e2e1 100644
--- a/drivers/gpu/drm/tegra/output.c
+++ b/drivers/gpu/drm/tegra/output.c
@@ -50,18 +50,11 @@ tegra_output_connector_detect(struct drm_connector *connector, bool force)
 	struct tegra_output *output = connector_to_output(connector);
 	enum drm_connector_status status = connector_status_unknown;
 
-	if (gpio_is_valid(output->hpd_gpio)) {
-		if (output->hpd_gpio_flags & OF_GPIO_ACTIVE_LOW) {
-			if (gpio_get_value(output->hpd_gpio) != 0)
-				status = connector_status_disconnected;
-			else
-				status = connector_status_connected;
-		} else {
-			if (gpio_get_value(output->hpd_gpio) == 0)
-				status = connector_status_disconnected;
-			else
-				status = connector_status_connected;
-		}
+	if (output->hpd_gpio) {
+		if (gpiod_get_value(output->hpd_gpio) == 0)
+			status = connector_status_disconnected;
+		else
+			status = connector_status_connected;
 	} else {
 		if (!output->panel)
 			status = connector_status_disconnected;
@@ -99,6 +92,7 @@ static irqreturn_t hpd_irq(int irq, void *data)
 int tegra_output_probe(struct tegra_output *output)
 {
 	struct device_node *ddc, *panel;
+	unsigned long flags;
 	int err, size;
 
 	if (!output->of_node)
@@ -127,23 +121,18 @@ int tegra_output_probe(struct tegra_output *output)
 		of_node_put(ddc);
 	}
 
-	output->hpd_gpio = of_get_named_gpio_flags(output->of_node,
-						   "nvidia,hpd-gpio", 0,
-						   &output->hpd_gpio_flags);
-	if (gpio_is_valid(output->hpd_gpio)) {
-		unsigned long flags;
+	output->hpd_gpio = devm_gpiod_get_from_of_node(output->dev,
+						       output->of_node,
+						       "nvidia,hpd-gpio", 0,
+						       GPIOD_IN,
+						       "HDMI hotplug detect");
+	if (IS_ERR(output->hpd_gpio))
+		return PTR_ERR(output->hpd_gpio);
 
-		err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN,
-				       "HDMI hotplug detect");
+	if (output->hpd_gpio) {
+		err = gpiod_to_irq(output->hpd_gpio);
 		if (err < 0) {
-			dev_err(output->dev, "gpio_request_one(): %d\n", err);
-			return err;
-		}
-
-		err = gpio_to_irq(output->hpd_gpio);
-		if (err < 0) {
-			dev_err(output->dev, "gpio_to_irq(): %d\n", err);
-			gpio_free(output->hpd_gpio);
+			dev_err(output->dev, "gpiod_to_irq(): %d\n", err);
 			return err;
 		}
 
@@ -157,7 +146,6 @@ int tegra_output_probe(struct tegra_output *output)
 		if (err < 0) {
 			dev_err(output->dev, "failed to request IRQ#%u: %d\n",
 				output->hpd_irq, err);
-			gpio_free(output->hpd_gpio);
 			return err;
 		}
 
@@ -183,10 +171,8 @@ void tegra_output_remove(struct tegra_output *output)
 	if (output->cec)
 		cec_notifier_put(output->cec);
 
-	if (gpio_is_valid(output->hpd_gpio)) {
+	if (output->hpd_gpio)
 		free_irq(output->hpd_irq, output);
-		gpio_free(output->hpd_gpio);
-	}
 
 	if (output->ddc)
 		put_device(&output->ddc->dev);
@@ -206,7 +192,7 @@ int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
 	 * The connector is now registered and ready to receive hotplug events
 	 * so the hotplug interrupt can be enabled.
 	 */
-	if (gpio_is_valid(output->hpd_gpio))
+	if (output->hpd_gpio)
 		enable_irq(output->hpd_irq);
 
 	return 0;
@@ -218,7 +204,7 @@ void tegra_output_exit(struct tegra_output *output)
 	 * The connector is going away, so the interrupt must be disabled to
 	 * prevent the hotplug interrupt handler from potentially crashing.
 	 */
-	if (gpio_is_valid(output->hpd_gpio))
+	if (output->hpd_gpio)
 		disable_irq(output->hpd_irq);
 
 	if (output->panel)
-- 
2.7.4