linux-kernel - [PATCH] usb: typec: ucsi: yoga-c630: add DRM dependency

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Message-Id: <20250717133045.991254-1-arnd@kernel.org>
Date: Thu, 17 Jul 2025 15:30:41 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Pavan Holla <pholla@...omium.org>,
	Łukasz Bartosik <ukaszb@...omium.org>,
	Yue Haibing <yuehaibing@...wei.com>,
	Pengyu Luo <mitltlatltl@...il.com>,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] usb: typec: ucsi: yoga-c630: add DRM dependency

From: Arnd Bergmann <arnd@...db.de>

Selecting DRM_AUX_HPD_BRIDGE is not possible from a built-in driver when
CONFIG_DRM=m:

WARNING: unmet direct dependencies detected for DRM_AUX_HPD_BRIDGE
  Depends on [m]: HAS_IOMEM [=y] && DRM [=m] && DRM_BRIDGE [=y] && OF [=y]
  Selected by [y]:
  - UCSI_LENOVO_YOGA_C630 [=y] && USB_SUPPORT [=y] && TYPEC [=y] && TYPEC_UCSI [=y] && EC_LENOVO_YOGA_C630 [=y] && DRM_BRIDGE [=y] && OF [=y]
arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/aux-hpd-bridge.o: in function `drm_aux_hpd_bridge_notify':
aux-hpd-bridge.c:(.text.drm_aux_hpd_bridge_notify+0x28): undefined reference to `drm_bridge_hpd_notify'
arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/aux-hpd-bridge.o: in function `drm_aux_hpd_bridge_probe':
aux-hpd-bridge.c:(.text.drm_aux_hpd_bridge_probe+0x20): undefined reference to `__devm_drm_bridge_alloc'

Add a dependency to force UCSI_LENOVO_YOGA_C630 to be a loadable module as
well in this configuration.

Fixes: eb90d36bfa06 ("usb: typec: ucsi: yoga-c630: register DRM HPD bridge")
Signed-off-by: Arnd Bergmann <arnd@...db.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 52b53bb6dfed..7fcb1e1de5d6 100644
--- a/drivers/usb/typec/ucsi/Kconfig
+++ b/drivers/usb/typec/ucsi/Kconfig
@@ -85,6 +85,7 @@ config CROS_EC_UCSI
 config UCSI_LENOVO_YOGA_C630
 	tristate "UCSI Interface Driver for Lenovo Yoga C630"
 	depends on EC_LENOVO_YOGA_C630
+	depends on DRM || !DRM
 	select DRM_AUX_HPD_BRIDGE if DRM_BRIDGE && OF
 	help
 	  This driver enables UCSI support on the Lenovo Yoga C630 laptop.
-- 
2.39.5