The newnly added debug mode for the atmel_mxt_ts driver relies on
the v4l2 interface and vb2_vmalloc, but those might be configured
as loadable modules when the driver itself is built-in, resulting
in a link failure:
drivers/input/touchscreen/atmel_mxt_ts.o: In function `mxt_vidioc_querycap':
atmel_mxt_ts.c:(.text.mxt_vidioc_querycap+0x10): undefined reference to `video_devdata'
drivers/input/touchscreen/atmel_mxt_ts.o: In function `mxt_buffer_queue':
atmel_mxt_ts.c:(.text.mxt_buffer_queue+0x20): undefined reference to `vb2_plane_vaddr'
atmel_mxt_ts.c:(.text.mxt_buffer_queue+0x164): undefined reference to `vb2_buffer_done'
drivers/input/touchscreen/atmel_mxt_ts.o: In function `mxt_free_object_table':
atmel_mxt_ts.c:(.text.mxt_free_object_table+0x18): undefined reference to `video_unregister_device'
atmel_mxt_ts.c:(.text.mxt_free_object_table+0x20): undefined reference to `v4l2_device_unregister'
The best workaround I could come up with is to disallow the debug
mode unless it's actually possible to call it.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixes: ecfdd7e2660e ("[media] Input: atmel_mxt_ts - output diagnostic debug via V4L2 device")
---
drivers/input/touchscreen/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index fce1e41ffe8b..ccf933969587 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -117,7 +117,8 @@ config TOUCHSCREEN_ATMEL_MXT
config TOUCHSCREEN_ATMEL_MXT_T37
bool "Support T37 Diagnostic Data"
- depends on TOUCHSCREEN_ATMEL_MXT && VIDEO_V4L2
+ depends on TOUCHSCREEN_ATMEL_MXT
+ depends on VIDEO_V4L2=y || (TOUCHSCREEN_ATMEL_MXT=m && VIDEO_V4L2=m)
select VIDEOBUF2_VMALLOC
help
Say Y here if you want support to output data from the T37
--
2.9.0
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