As reported in [1], DRM_PANEL_EDP depends on DRM_DP_HELPER. Select
the option to fix the build failure. The error message is shown
below.
arm-linux-gnueabihf-ld: drivers/gpu/drm/panel/panel-edp.o: in function
`panel_edp_probe': panel-edp.c:(.text+0xb74): undefined reference to
`drm_panel_dp_aux_backlight'
make[1]: *** [/builds/linux/Makefile:1222: vmlinux] Error 1
The issue has been reported before, when DisplayPort helpers were
hidden behind the option CONFIG_DRM_KMS_HELPER. [2]
v2:
* fix and expand commit description (Arnd)
Signed-off-by: Thomas Zimmermann <[email protected]>
Fixes: adb9d5a2cc77 ("drm/dp: Move DisplayPort helpers into separate helper
module")
Fixes: 5f04e7ce392d ("drm/panel-edp: Split eDP panels out of panel-simple")
Reported-by: Naresh Kamboju <[email protected]>
Reported-by: Linux Kernel Functional Testing <[email protected]>
Link:
https://lore.kernel.org/dri-devel/CA+G9fYvN0NyaVkRQmA1O6rX7H8PPaZrUAD7=rdy33qy9ruu...@mail.gmail.com/
# [1]
Link: https://lore.kernel.org/all/[email protected]/
# [2]
Cc: Thomas Zimmermann <[email protected]>
Cc: Lyude Paul <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: [email protected]
---
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 434c2861bb40..0aec5a10b064 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -106,6 +106,7 @@ config DRM_PANEL_EDP
depends on PM
select VIDEOMODE_HELPERS
select DRM_DP_AUX_BUS
+ select DRM_DP_HELPER
help
DRM panel driver for dumb eDP panels that need at most a regulator and
a GPIO to be powered up. Optionally a backlight can be attached so
--
2.34.1
