[PATCH v2 07/12] drm/bridge: lt8912b: convert to of_drm_find_and_get_bridge()

[Luca Ceresoli]

of_drm_find_bridge() is deprecated. Move to its replacement
of_drm_find_and_get_bridge() which gets a bridge reference, and ensure it
is put when done by using the drm_bridge::next_bridge pointer.

Acked-by: Maxime Ripard <mripard at kernel.org>
Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 31 +++++++++++++++----------------
 1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 342374cb8fc6..8a0b48efca58 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -35,7 +35,6 @@ struct lt8912 {
 	struct regmap *regmap[I2C_MAX_IDX];
 
 	struct device_node *host_node;
-	struct drm_bridge *hdmi_port;
 
 	struct mipi_dsi_device *dsi;
 
@@ -407,8 +406,8 @@ lt8912_connector_detect(struct drm_connector *connector, bool force)
 {
 	struct lt8912 *lt = connector_to_lt8912(connector);
 
-	if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT)
-		return drm_bridge_detect(lt->hdmi_port, connector);
+	if (lt->bridge.next_bridge->ops & DRM_BRIDGE_OP_DETECT)
+		return drm_bridge_detect(lt->bridge.next_bridge, connector);
 
 	return lt8912_check_cable_status(lt);
 }
@@ -429,7 +428,7 @@ static int lt8912_connector_get_modes(struct drm_connector *connector)
 	u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 	int ret, num;
 
-	drm_edid = drm_bridge_edid_read(lt->hdmi_port, connector);
+	drm_edid = drm_bridge_edid_read(lt->bridge.next_bridge, connector);
 	drm_edid_connector_update(connector, drm_edid);
 	if (!drm_edid)
 		return 0;
@@ -519,8 +518,8 @@ static int lt8912_bridge_connector_init(struct drm_bridge *bridge)
 	struct lt8912 *lt = bridge_to_lt8912(bridge);
 	struct drm_connector *connector = &lt->connector;
 
-	if (lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD) {
-		drm_bridge_hpd_enable(lt->hdmi_port, lt8912_bridge_hpd_cb, lt);
+	if (lt->bridge.next_bridge->ops & DRM_BRIDGE_OP_HPD) {
+		drm_bridge_hpd_enable(lt->bridge.next_bridge, lt8912_bridge_hpd_cb, lt);
 		connector->polled = DRM_CONNECTOR_POLL_HPD;
 	} else {
 		connector->polled = DRM_CONNECTOR_POLL_CONNECT |
@@ -529,7 +528,7 @@ static int lt8912_bridge_connector_init(struct drm_bridge *bridge)
 
 	ret = drm_connector_init(bridge->dev, connector,
 				 &lt8912_connector_funcs,
-				 lt->hdmi_port->type);
+				 lt->bridge.next_bridge->type);
 	if (ret)
 		goto exit;
 
@@ -549,7 +548,7 @@ static int lt8912_bridge_attach(struct drm_bridge *bridge,
 	struct lt8912 *lt = bridge_to_lt8912(bridge);
 	int ret;
 
-	ret = drm_bridge_attach(encoder, lt->hdmi_port, bridge,
+	ret = drm_bridge_attach(encoder, lt->bridge.next_bridge, bridge,
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (ret < 0) {
 		dev_err(lt->dev, "Failed to attach next bridge (%d)\n", ret);
@@ -585,8 +584,8 @@ static void lt8912_bridge_detach(struct drm_bridge *bridge)
 
 	lt8912_hard_power_off(lt);
 
-	if (lt->connector.dev && lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD)
-		drm_bridge_hpd_disable(lt->hdmi_port);
+	if (lt->connector.dev && lt->bridge.next_bridge->ops & DRM_BRIDGE_OP_HPD)
+		drm_bridge_hpd_disable(lt->bridge.next_bridge);
 }
 
 static enum drm_mode_status
@@ -611,8 +610,8 @@ lt8912_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connector)
 {
 	struct lt8912 *lt = bridge_to_lt8912(bridge);
 
-	if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT)
-		return drm_bridge_detect(lt->hdmi_port, connector);
+	if (lt->bridge.next_bridge->ops & DRM_BRIDGE_OP_DETECT)
+		return drm_bridge_detect(lt->bridge.next_bridge, connector);
 
 	return lt8912_check_cable_status(lt);
 }
@@ -626,8 +625,8 @@ static const struct drm_edid *lt8912_bridge_edid_read(struct drm_bridge *bridge,
 	 * edid must be read through the ddc bus but it must be
 	 * given to the hdmi connector node.
 	 */
-	if (lt->hdmi_port->ops & DRM_BRIDGE_OP_EDID)
-		return drm_bridge_edid_read(lt->hdmi_port, connector);
+	if (lt->bridge.next_bridge->ops & DRM_BRIDGE_OP_EDID)
+		return drm_bridge_edid_read(lt->bridge.next_bridge, connector);
 
 	dev_warn(lt->dev, "The connected bridge does not supports DRM_BRIDGE_OP_EDID\n");
 	return NULL;
@@ -723,8 +722,8 @@ static int lt8912_parse_dt(struct lt8912 *lt)
 		goto err_free_host_node;
 	}
 
-	lt->hdmi_port = of_drm_find_bridge(port_node);
-	if (!lt->hdmi_port) {
+	lt->bridge.next_bridge = of_drm_find_and_get_bridge(port_node);
+	if (!lt->bridge.next_bridge) {
 		ret = -EPROBE_DEFER;
 		dev_err_probe(lt->dev, ret, "%s: Failed to get hdmi port\n", __func__);
 		goto err_free_host_node;

-- 
2.52.0