linux-kernel - [PATCH] drm/panel: visionox-rm69299: add backlight dependency

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Message-Id: <20251204094734.1031114-1-arnd@kernel.org>
Date: Thu,  4 Dec 2025 10:47:26 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Neil Armstrong <neil.armstrong@...aro.org>,
	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>,
	Guido Günther <agx@...xcpu.org>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Jessica Zhang <jesszhan0024@...il.com>,
	Svyatoslav Ryhel <clamor95@...il.com>,
	David Heidelberg <david@...t.cz>,
	Linus Walleij <linus.walleij@...aro.org>,
	Kaustabh Chakraborty <kauschluss@...root.org>,
	Maxim Schwalm <maxim.schwalm@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Colin Ian King <colin.i.king@...il.com>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/panel: visionox-rm69299: add backlight dependency

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

The recently added backlight support breaks when CONFIG_BACKLIGHT_CLASS_DEVICE
is turned off:

arm-linux-gnueabi-ld: drivers/gpu/drm/panel/panel-visionox-rm69299.o: in function `visionox_rm69299_probe':
panel-visionox-rm69299.c:(.text.visionox_rm69299_probe+0x92): undefined reference to `devm_backlight_device_register'
arm-linux-gnueabi-ld: (devm_backlight_device_register): Unknown destination type (ARM/Thumb) in drivers/gpu/drm/panel/panel-visionox-rm69299.o

Add the appropriate Kconfig dependency.

Fixes: 7911d8cab554 ("drm/panel: visionox-rm69299: Add backlight support")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/panel/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 76f6af819037..2923148dcf07 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -1163,6 +1163,7 @@ config DRM_PANEL_VISIONOX_R66451
 
 config DRM_PANEL_VISIONOX_RM69299
 	tristate "Visionox RM69299"
+	depends on BACKLIGHT_CLASS_DEVICE
 	depends on OF
 	depends on DRM_MIPI_DSI
 	help
-- 
2.39.5