From: Arnd Bergmann <arnd@arndb.de>

Selecting CONFIG_DRM_AUX_HPD_BRIDGE is not allowed when its dependencies
are not met:

WARNING: unmet direct dependencies detected for DRM_AUX_HPD_BRIDGE
  Depends on [n]: HAS_IOMEM [=y] && DRM [=n] && DRM_BRIDGE [=n] && OF [=n]
  Selected by [m]:
  - UCSI_HUAWEI_GAOKUN [=m] && USB_SUPPORT [=y] && TYPEC [=y] && TYPEC_UCSI [=m] && EC_HUAWEI_GAOKUN [=m]

ERROR: modpost: "drm_bridge_hpd_notify" [drivers/gpu/drm/bridge/aux-hpd-bridge.ko] undefined!
ERROR: modpost: "devm_drm_bridge_add" [drivers/gpu/drm/bridge/aux-hpd-bridge.ko] undefined!

Add the same dependencies for the new UCSI_HUAWEI_GAOKUN driver to ensure
it always builds cleanly.

Fixes: 00327d7f2c8c ("usb: typec: ucsi: add Huawei Matebook E Go ucsi driver")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202504140319.dgpbDOJZ-lkp@intel.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/usb/typec/ucsi/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig
index e94956d27325..bdabae71b4ac 100644
--- a/drivers/usb/typec/ucsi/Kconfig
+++ b/drivers/usb/typec/ucsi/Kconfig
@@ -94,6 +94,7 @@ config UCSI_LENOVO_YOGA_C630
 config UCSI_HUAWEI_GAOKUN
 	tristate "UCSI Interface Driver for Huawei Matebook E Go"
 	depends on EC_HUAWEI_GAOKUN
+	depends on DRM_BRIDGE && OF
 	select DRM_AUX_HPD_BRIDGE
 	help
 	  This driver enables UCSI support on the Huawei Matebook E Go tablet,
-- 
2.39.5

On Fri, Apr 25, 2025 at 01:30:21PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> Selecting CONFIG_DRM_AUX_HPD_BRIDGE is not allowed when its dependencies
> are not met:
> 
> WARNING: unmet direct dependencies detected for DRM_AUX_HPD_BRIDGE
>   Depends on [n]: HAS_IOMEM [=y] && DRM [=n] && DRM_BRIDGE [=n] && OF [=n]
>   Selected by [m]:
>   - UCSI_HUAWEI_GAOKUN [=m] && USB_SUPPORT [=y] && TYPEC [=y] && TYPEC_UCSI [=m] && EC_HUAWEI_GAOKUN [=m]
> 
> ERROR: modpost: "drm_bridge_hpd_notify" [drivers/gpu/drm/bridge/aux-hpd-bridge.ko] undefined!
> ERROR: modpost: "devm_drm_bridge_add" [drivers/gpu/drm/bridge/aux-hpd-bridge.ko] undefined!
> 
> Add the same dependencies for the new UCSI_HUAWEI_GAOKUN driver to ensure
> it always builds cleanly.
> 
> Fixes: 00327d7f2c8c ("usb: typec: ucsi: add Huawei Matebook E Go ucsi driver")
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202504140319.dgpbDOJZ-lkp@intel.com/
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/usb/typec/ucsi/Kconfig | 1 +
>  1 file changed, 1 insertion(+)

I just took this version which was sent before yours, sorry:
	https://lore.kernel.org/r/20250417122843.2667008-1-yuehaibing@huawei.com