| Message ID | 20210920095830.1259051-1-arnd@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: i2c: select V4L2_ASYNC where needed | expand |
Hi Anrd, On Mon, Sep 20, 2021 at 11:58:24AM +0200, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@arndb.de> > > I came across a link failure from randconfig builds: > > x86_64-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_remove': > ths8200.c:(.text+0x491): undefined reference to `v4l2_async_unregister_subdev' > x86_64-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_probe': > ths8200.c:(.text+0xe49): undefined reference to `v4l2_async_register_subdev' > x86_64-linux-ld: drivers/media/i2c/tw9910.o: in function `tw9910_remove': > tw9910.c:(.text+0x467): undefined reference to `v4l2_async_unregister_subdev' > x86_64-linux-ld: drivers/media/i2c/tw9910.o: in function `tw9910_probe': > tw9910.c:(.text+0x1123): undefined reference to `v4l2_async_register_subdev' > > These clearly lack a 'select' statement, but I don't know why > this started happening only now. I had a bit of a look around to find > other configs that have the same problem, but could not come up with > a reliable way and found nothing else through experimentation. > It is likely that other symbols like these exist that need an extra > select. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Probably this one: commit ff3cc65cadb5d7333fde557b38cbb60b3a6cf496 Author: Sakari Ailus <sakari.ailus@linux.intel.com> Date: Fri Mar 5 18:38:39 2021 +0100 media: v4l: async, fwnode: Improve module organisation The V4L2 async framework is generally used with the V4L2 fwnode, which also depends on the former. There are a few exceptions but they are relatively few. At the same time there is a vast number of systems that need videodev module, but have no use for v4l2-async that's now part of videodev. In order to improve, split the v4l2-async into its own module. Selecting V4L2_FWNODE also selects V4L2_ASYNC. This also moves the initialisation of the debufs entries for async subdevs to loading of the v4l2-async module. The directory is named as "v4l2-async". Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> I think I must have missed some drivers using v4l2-async. Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
On 9/20/21 2:58 AM, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@arndb.de> > > I came across a link failure from randconfig builds: > > x86_64-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_remove': > ths8200.c:(.text+0x491): undefined reference to `v4l2_async_unregister_subdev' > x86_64-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_probe': > ths8200.c:(.text+0xe49): undefined reference to `v4l2_async_register_subdev' ths8200 is already fixed. > x86_64-linux-ld: drivers/media/i2c/tw9910.o: in function `tw9910_remove': > tw9910.c:(.text+0x467): undefined reference to `v4l2_async_unregister_subdev' > x86_64-linux-ld: drivers/media/i2c/tw9910.o: in function `tw9910_probe': > tw9910.c:(.text+0x1123): undefined reference to `v4l2_async_register_subdev' > > These clearly lack a 'select' statement, but I don't know why > this started happening only now. I had a bit of a look around to find > other configs that have the same problem, but could not come up with > a reliable way and found nothing else through experimentation. > It is likely that other symbols like these exist that need an extra > select. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > drivers/media/i2c/Kconfig | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig > index 08feb3e8c1bf..d49eecc4fe33 100644 > --- a/drivers/media/i2c/Kconfig > +++ b/drivers/media/i2c/Kconfig > @@ -450,6 +450,7 @@ config VIDEO_TW9906 > config VIDEO_TW9910 > tristate "Techwell TW9910 video decoder" > depends on VIDEO_V4L2 && I2C > + select V4L2_ASYNC > help > Support for Techwell TW9910 NTSC/PAL/SECAM video decoder. > > @@ -597,6 +598,7 @@ config VIDEO_AK881X > config VIDEO_THS8200 > tristate "Texas Instruments THS8200 video encoder" > depends on VIDEO_V4L2 && I2C > + select V4L2_ASYNC > help > Support for the Texas Instruments THS8200 video encoder. > > Thanks.
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 08feb3e8c1bf..d49eecc4fe33 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -450,6 +450,7 @@ config VIDEO_TW9906 config VIDEO_TW9910 tristate "Techwell TW9910 video decoder" depends on VIDEO_V4L2 && I2C + select V4L2_ASYNC help Support for Techwell TW9910 NTSC/PAL/SECAM video decoder. @@ -597,6 +598,7 @@ config VIDEO_AK881X config VIDEO_THS8200 tristate "Texas Instruments THS8200 video encoder" depends on VIDEO_V4L2 && I2C + select V4L2_ASYNC help Support for the Texas Instruments THS8200 video encoder.