linux/drivers/media/v4l2-core
Mauro Carvalho Chehab 9958d30f38 media: Kconfig: cleanup VIDEO_DEV dependencies
media Kconfig has two entries associated to V4L API:
VIDEO_DEV and VIDEO_V4L2.

On Kernel 2.6.x, there were two V4L APIs, each one with its own flag.
VIDEO_DEV were meant to:
	1) enable Video4Linux and make its Kconfig options to appear;
	2) it makes the Kernel build the V4L core.

while VIDEO_V4L2 where used to distinguish between drivers that
implement the newer API and drivers that implemented the former one.

With time, such meaning changed, specially after the removal of
all V4L version 1 drivers.

At the current implementation, VIDEO_DEV only does (1): it enables
the media options related to V4L, that now has:

	menu "Video4Linux options"
		visible if VIDEO_DEV

	source "drivers/media/v4l2-core/Kconfig"
	endmenu

but it doesn't affect anymore the V4L core drivers.

The rationale is that the V4L2 core has a "soft" dependency
at the I2C bus, and now requires to select a number of other
Kconfig options:

	config VIDEO_V4L2
		tristate
		depends on (I2C || I2C=n) && VIDEO_DEV
		select RATIONAL
		select VIDEOBUF2_V4L2 if VIDEOBUF2_CORE
		default (I2C || I2C=n) && VIDEO_DEV

In the past, merging them would be tricky, but it seems that it is now
possible to merge those symbols, in order to simplify V4L dependencies.

Let's keep VIDEO_DEV, as this one is used on some make *defconfig
configurations.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> # for meson-vdec & meson-ge2d
Acked-by: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
Acked-by: Łukasz Stelmach <l.stelmach@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-03-18 05:58:35 +01:00
..
Kconfig media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
Makefile media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
tuner-core.c media: xc2028: rename the driver from tuner-xc2028 2022-03-12 16:59:50 +01:00
v4l2-async.c media: v4l: async: Rename async nf functions, clean up long lines 2021-09-30 10:07:35 +02:00
v4l2-common.c media: Add NV12_4L4 tiled format 2021-09-30 10:07:40 +02:00
v4l2-compat-ioctl32.c media: v4l2-core: fix VIDIOC_DQEVENT handling on non-x86 2021-11-10 11:38:26 +00:00
v4l2-ctrls-api.c media: v4l2-ctrls: split up into four source files 2021-05-25 17:03:29 +02:00
v4l2-ctrls-core.c Tag branch 2022-03-07 16:27:01 +01:00
v4l2-ctrls-defs.c media: uapi: Add VP9 stateless decoder controls 2021-11-22 07:44:55 +00:00
v4l2-ctrls-priv.h media: v4l2-ctrls: split up into four source files 2021-05-25 17:03:29 +02:00
v4l2-ctrls-request.c media: v4l2-ctrls: split up into four source files 2021-05-25 17:03:29 +02:00
v4l2-dev.c media: v4l2-dev: Use non-atomic bitmap API when applicable 2022-01-28 13:20:35 +01:00
v4l2-device.c media: v4l: subdev: Set sd->devnode before registering the subdev 2020-12-02 15:55:44 +01:00
v4l2-dv-timings.c media: v4l2-dv-timings.c: fix wrong condition in two for-loops 2021-08-04 14:43:52 +02:00
v4l2-event.c media: v4l2-event: Modified variable type 'unsigned' to 'unsigned int' 2021-06-17 10:22:59 +02:00
v4l2-fh.c media: v4l2-core: Avoid the dangling pointer in v4l2_fh_release 2021-06-02 13:17:44 +02:00
v4l2-flash-led-class.c media: v4l2-flash: Check whether setting LED brightness succeeded 2021-08-04 14:43:51 +02:00
v4l2-fwnode.c v4l: fwnode: Remove now-redundant loop from v4l2_fwnode_parse_reference() 2022-03-04 00:27:07 +02:00
v4l2-h264.c media: uapi: h264: Clean slice invariants syntax elements 2020-09-01 14:13:28 +02:00
v4l2-i2c.c media: v4l2-core: v4l2-i2c: convert to new API with ERRPTR 2020-02-24 15:21:52 +01:00
v4l2-ioctl.c media: add nv12m_8l128 and nv12m_10be_8l128 video format. 2022-03-07 17:13:31 +01:00
v4l2-jpeg.c media: Avoid parsing quantization and huffman tables 2021-03-22 10:40:13 +01:00
v4l2-mc.c media: v4l2-mc: fix a warning message 2021-03-22 13:06:39 +01:00
v4l2-mem2mem.c media: v4l2-mem2mem: Apply DST_QUEUE_OFF_BASE on MMAP buffers across ioctls 2022-01-23 21:18:42 +01:00
v4l2-spi.c v4l2-core: fix coding style for the two new c files 2019-08-26 11:01:25 -03:00
v4l2-subdev.c media: v4l2-subdev: Drop .set_mbus_config() operation 2022-01-28 15:51:23 +01:00
v4l2-trace.c
v4l2-vp9.c media: Add VP9 v4l2 library 2021-11-22 07:47:13 +00:00
videobuf-core.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
videobuf-dma-contig.c mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
videobuf-dma-sg.c media: videobuf-dma-sg: void function return statements are not generally useful 2021-06-02 14:18:36 +02:00
videobuf-vmalloc.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00