[PATCH] usb: typec: tcpci: add DRM DP HPD bridge support

[Alexey Charkov]

Add support to use TCPCI based USB-C connectors with the DP AltMode
helper code on devicetree based platforms.

Signed-off-by: Alexey Charkov <alchark@xxxxxxxxxxx>
---
 drivers/usb/typec/tcpm/Kconfig |  2 ++
 drivers/usb/typec/tcpm/tcpci.c | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig
index 00baa7503d45..53abde8ebef9 100644
--- a/drivers/usb/typec/tcpm/Kconfig
+++ b/drivers/usb/typec/tcpm/Kconfig
@@ -13,7 +13,9 @@ if TYPEC_TCPM
 
 config TYPEC_TCPCI
 	tristate "Type-C Port Controller Interface driver"
+	depends on DRM || DRM=n
 	depends on I2C
+	select DRM_AUX_HPD_BRIDGE if DRM_BRIDGE && OF
 	select REGMAP_I2C
 	help
 	  Type-C Port Controller driver for TCPCI-compliant controller.
diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index 0148b8f50412..e6cccbd377f7 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -5,6 +5,7 @@
  * USB Type-C Port Controller Interface.
  */
 
+#include <drm/bridge/aux-bridge.h>
 #include <linux/bitfield.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
@@ -837,6 +838,7 @@ static int tcpci_parse_config(struct tcpci *tcpci)
 
 struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data)
 {
+	struct auxiliary_device *bridge_dev;
 	struct tcpci *tcpci;
 	int err;
 
@@ -889,12 +891,23 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data)
 	if (err < 0)
 		return ERR_PTR(err);
 
+	bridge_dev = devm_drm_dp_hpd_bridge_alloc(tcpci->dev, to_of_node(tcpci->tcpc.fwnode));
+	if (IS_ERR(bridge_dev))
+		return ERR_CAST(bridge_dev);
+
 	tcpci->port = tcpm_register_port(tcpci->dev, &tcpci->tcpc);
 	if (IS_ERR(tcpci->port)) {
 		fwnode_handle_put(tcpci->tcpc.fwnode);
 		return ERR_CAST(tcpci->port);
 	}
 
+	err = devm_drm_dp_hpd_bridge_add(tcpci->dev, bridge_dev);
+	if (err < 0) {
+		tcpm_unregister_port(tcpci->port);
+		fwnode_handle_put(tcpci->tcpc.fwnode);
+		return ERR_PTR(err);
+	}
+
 	return tcpci;
 }
 EXPORT_SYMBOL_GPL(tcpci_register_port);

---
base-commit: e98d21c170b01ddef366f023bbfcf6b31509fa83
change-id: 20260513-tcpci-drm-bridge-d8dc384d71ee

Best regards,
-- 
Alexey Charkov <alchark@xxxxxxxxxxx>