[PATCH v4 3/3] usb: typec: nb7vpq904m: switch to DRM_AUX_BRIDGE

[Dmitry Baryshkov]

Switch to using the new DRM_AUX_BRIDGE helper to create the
transparent DRM bridge device instead of handcoding corresponding
functionality.

Reviewed-by: Heikki Krogerus <heikki.kroge...@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/usb/typec/mux/Kconfig      |  2 +-
 drivers/usb/typec/mux/nb7vpq904m.c | 44 ++----------------------------
 2 files changed, 3 insertions(+), 43 deletions(-)

diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig
index 65da61150ba7..e3fee531548f 100644
--- a/drivers/usb/typec/mux/Kconfig
+++ b/drivers/usb/typec/mux/Kconfig
@@ -40,7 +40,7 @@ config TYPEC_MUX_NB7VPQ904M
        tristate "On Semiconductor NB7VPQ904M Type-C redriver driver"
        depends on I2C
        depends on DRM || DRM=n
-       select DRM_PANEL_BRIDGE if DRM
+       select DRM_AUX_BRIDGE if DRM && OF
        select REGMAP_I2C
        help
          Say Y or M if your system has a On Semiconductor NB7VPQ904M Type-C
diff --git a/drivers/usb/typec/mux/nb7vpq904m.c 
b/drivers/usb/typec/mux/nb7vpq904m.c
index cda206cf0c38..b17826713753 100644
--- a/drivers/usb/typec/mux/nb7vpq904m.c
+++ b/drivers/usb/typec/mux/nb7vpq904m.c
@@ -11,7 +11,7 @@
 #include <linux/regmap.h>
 #include <linux/bitfield.h>
 #include <linux/of_graph.h>
-#include <drm/drm_bridge.h>
+#include <drm/bridge/aux-bridge.h>
 #include <linux/usb/typec_dp.h>
 #include <linux/usb/typec_mux.h>
 #include <linux/usb/typec_retimer.h>
@@ -70,8 +70,6 @@ struct nb7vpq904m {
        bool swap_data_lanes;
        struct typec_switch *typec_switch;
 
-       struct drm_bridge bridge;
-
        struct mutex lock; /* protect non-concurrent retimer & switch */
 
        enum typec_orientation orientation;
@@ -297,44 +295,6 @@ static int nb7vpq904m_retimer_set(struct typec_retimer 
*retimer, struct typec_re
        return ret;
 }
 
-#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE)
-static int nb7vpq904m_bridge_attach(struct drm_bridge *bridge,
-                                   enum drm_bridge_attach_flags flags)
-{
-       struct nb7vpq904m *nb7 = container_of(bridge, struct nb7vpq904m, 
bridge);
-       struct drm_bridge *next_bridge;
-
-       if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
-               return -EINVAL;
-
-       next_bridge = devm_drm_of_get_bridge(&nb7->client->dev, 
nb7->client->dev.of_node, 0, 0);
-       if (IS_ERR(next_bridge)) {
-               dev_err(&nb7->client->dev, "failed to acquire drm_bridge: 
%pe\n", next_bridge);
-               return PTR_ERR(next_bridge);
-       }
-
-       return drm_bridge_attach(bridge->encoder, next_bridge, bridge,
-                                DRM_BRIDGE_ATTACH_NO_CONNECTOR);
-}
-
-static const struct drm_bridge_funcs nb7vpq904m_bridge_funcs = {
-       .attach = nb7vpq904m_bridge_attach,
-};
-
-static int nb7vpq904m_register_bridge(struct nb7vpq904m *nb7)
-{
-       nb7->bridge.funcs = &nb7vpq904m_bridge_funcs;
-       nb7->bridge.of_node = nb7->client->dev.of_node;
-
-       return devm_drm_bridge_add(&nb7->client->dev, &nb7->bridge);
-}
-#else
-static int nb7vpq904m_register_bridge(struct nb7vpq904m *nb7)
-{
-       return 0;
-}
-#endif
-
 static const struct regmap_config nb7_regmap = {
        .max_register = 0x1f,
        .reg_bits = 8,
@@ -461,7 +421,7 @@ static int nb7vpq904m_probe(struct i2c_client *client)
 
        gpiod_set_value(nb7->enable_gpio, 1);
 
-       ret = nb7vpq904m_register_bridge(nb7);
+       ret = drm_aux_bridge_register(dev);
        if (ret)
                goto err_disable_gpio;
 
-- 
2.39.2