linux-kernel - [PATCH] drm/imx: select DRM_DISPLAY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251204094635.1030724-1-arnd@kernel.org>
Date: Thu,  4 Dec 2025 10:46:26 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Philipp Zabel <p.zabel@...gutronix.de>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Dmitry Baryshkov <lumag@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	dri-devel@...ts.freedesktop.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/imx: select DRM_DISPLAY_HELPER as needed

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

CONFIG_DRM_BRIDGE_CONNECTOR is a bool option that turns on features of
the display helpers, which are in a module controlled by the (tristate)
CONFIG_DRM_DISPLAY_HELPER. If the display helpers are in a loadable
module, a built-in driver trying to use the bridge connectors fails
to link:

x86_64-linux-ld: drivers/gpu/drm/imx/ipuv3/parallel-display.o: in function `imx_pd_bind':
parallel-display.c:(.text+0xcd): undefined reference to `drm_bridge_connector_init'
x86_64-linux-ld: drivers/gpu/drm/imx/ipuv3/imx-ldb.o: in function `imx_ldb_bind':
imx-ldb.c:(.text+0x224): undefined reference to `drm_bridge_connector_init'

Select the DRM_BRIDGE_CONNECTOR symbol as well, to ensure it's built-in
if anything needs it.

Fixes: f94b9707a1c9 ("drm/imx: parallel-display: switch to imx_legacy_bridge / drm_bridge_connector")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/imx/ipuv3/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/imx/ipuv3/Kconfig b/drivers/gpu/drm/imx/ipuv3/Kconfig
index acaf25089001..1c3825a86380 100644
--- a/drivers/gpu/drm/imx/ipuv3/Kconfig
+++ b/drivers/gpu/drm/imx/ipuv3/Kconfig
@@ -13,6 +13,7 @@ config DRM_IMX
 config DRM_IMX_PARALLEL_DISPLAY
 	tristate "Support for parallel displays"
 	depends on DRM_IMX
+	select DRM_DISPLAY_HELPER
 	select DRM_BRIDGE
 	select DRM_BRIDGE_CONNECTOR
 	select DRM_IMX_LEGACY_BRIDGE
@@ -33,6 +34,7 @@ config DRM_IMX_LDB
 	depends on DRM_IMX
 	depends on COMMON_CLK
 	select MFD_SYSCON
+	select DRM_DISPLAY_HELPER
 	select DRM_BRIDGE
 	select DRM_BRIDGE_CONNECTOR
 	select DRM_PANEL_BRIDGE
-- 
2.39.5