Commit 47d8e00c authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Mauro Carvalho Chehab

[media] Input: synaptics-rmi4: disallow impossible configuration

The newly added debug mode for the synaptics-rmi4 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/rmi4/rmi_core.o: In function `rmi_f54_remove':
rmi_f54.c:(.text.rmi_f54_remove+0x14): undefined reference to `video_unregister_device'
rmi_f54.c:(.text.rmi_f54_remove+0x20): undefined reference to `v4l2_device_unregister'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_s_input':
rmi_f54.c:(.text.rmi_f54_vidioc_s_input+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_g_input':
rmi_f54.c:(.text.rmi_f54_vidioc_g_input+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_fmt':
rmi_f54.c:(.text.rmi_f54_vidioc_fmt+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_enum_input':
rmi_f54.c:(.text.rmi_f54_vidioc_enum_input+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_querycap':
...

The best workaround I could come up with is to disallow the debug
mode unless it's actually possible to call it.

Fixes: 3a762dbd ("[media] Input: synaptics-rmi4 - add support for F54 diagnostics")
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarNick Dyer <nick@shmanahar.org>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 7a4b9a29
...@@ -65,7 +65,7 @@ config RMI4_F30 ...@@ -65,7 +65,7 @@ config RMI4_F30
config RMI4_F54 config RMI4_F54
bool "RMI4 Function 54 (Analog diagnostics)" bool "RMI4 Function 54 (Analog diagnostics)"
depends on RMI4_CORE depends on RMI4_CORE
depends on VIDEO_V4L2 depends on VIDEO_V4L2=y || (RMI4_CORE=m && VIDEO_V4L2=m)
select VIDEOBUF2_VMALLOC select VIDEOBUF2_VMALLOC
help help
Say Y here if you want to add support for RMI4 function 54 Say Y here if you want to add support for RMI4 function 54
......
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