Subject: [PATCH v15 5/9] phy: rockchip: phy-rockchip-typec: Add DRM AUX bridge

From: Chaoyi Chen <[email-masked]>
Date: Wed, 4 Mar 2026 17:41:48 +0800

From: Chaoyi Chen <[email-masked]>

Using the DRM_AUX_BRIDGE helper to create the transparent DRM bridge
device.

Signed-off-by: Chaoyi Chen <[email-masked]>
Reviewed-by: Neil Armstrong <[email-masked]>
---

(no changes since v11)

Changes in v10:
- Use drm_aux_bridge_register_from_node() instead.

(no changes since v7)

Changes in v6:
- Fix depend in Kconfig.
---

 drivers/phy/rockchip/Kconfig              | 2 ++
 drivers/phy/rockchip/phy-rockchip-typec.c | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
index db4adc7c53da..bcb5476222fc 100644
--- a/drivers/phy/rockchip/Kconfig
+++ b/drivers/phy/rockchip/Kconfig
@@ -120,6 +120,8 @@ config PHY_ROCKCHIP_TYPEC
 	tristate "Rockchip TYPEC PHY Driver"
 	depends on OF && (ARCH_ROCKCHIP || COMPILE_TEST)
 	depends on TYPEC || TYPEC=n
+	depends on DRM || DRM=n
+	select DRM_AUX_BRIDGE if DRM_BRIDGE
 	select EXTCON
 	select GENERIC_PHY
 	select RESET_CONTROLLER
diff --git a/drivers/phy/rockchip/phy-rockchip-typec.c b/drivers/phy/rockchip/phy-rockchip-typec.c
index 1f5b4142cbe4..e31b778c3537 100644
--- a/drivers/phy/rockchip/phy-rockchip-typec.c
+++ b/drivers/phy/rockchip/phy-rockchip-typec.c
@@ -56,6 +56,7 @@
 #include <linux/phy/phy.h>
 #include <linux/usb/typec_dp.h>
 #include <linux/usb/typec_mux.h>
+#include <drm/bridge/aux-bridge.h>
 
 #define CMN_SSM_BANDGAP			(0x21 << 2)
 #define CMN_SSM_BIAS			(0x22 << 2)
@@ -1312,6 +1313,10 @@ static int tcphy_setup_typec_mux(struct rockchip_typec_phy *tcphy)
 	if (!of_property_read_bool(np, "mode-switch"))
 		goto put_np;
 
+	ret = drm_aux_bridge_register_from_node(tcphy->dev, np);
+	if (ret)
+		goto put_np;
+
 	mux_desc.drvdata = tcphy;
 	mux_desc.fwnode = device_get_named_child_node(tcphy->dev, "dp-port");
 	mux_desc.set = tcphy_typec_mux_set;
-- 
2.51.1