9958d30f38
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>
2.4 KiB
SPDX-License-Identifier: GPL-2.0-only
DVB device configuration
config DVB_MMAP bool "Enable DVB memory-mapped API (EXPERIMENTAL)" depends on DVB_CORE depends on VIDEO_DEV=y || VIDEO_DEV=DVB_CORE select VIDEOBUF2_VMALLOC help This option enables DVB experimental memory-mapped API, which reduces the number of context switches to read DVB buffers, as the buffers can use mmap() syscalls.
Support for it is experimental. Use with care. If unsure,
say N.
config DVB_NET bool "DVB Network Support" default (NET && INET) depends on NET && INET && DVB_CORE help This option enables DVB Network Support which is a part of the DVB standard. It is used, for example, by automatic firmware updates used on Set-Top-Boxes. It can also be used to access the Internet via the DVB card, if the network provider supports it.
You may want to disable the network support on embedded devices. If
unsure say Y.
config DVB_MAX_ADAPTERS int "maximum number of DVB/ATSC adapters" depends on DVB_CORE default 16 range 1 255 help Maximum number of DVB/ATSC adapters. Increasing this number increases the memory consumption of the DVB subsystem even if a much lower number of DVB/ATSC adapters is present. Only values in the range 4-32 are tested.
If you are unsure about this, use the default value 16
config DVB_DYNAMIC_MINORS bool "Dynamic DVB minor allocation" depends on DVB_CORE default y help If you say Y here, the DVB subsystem will use dynamic minor allocation for any device that uses the DVB major number. This means that you can have more than 4 of a single type of device (like demuxes and frontends) per adapter, but udev will be required to manage the device nodes.
If you are unsure about this, say N here.
config DVB_DEMUX_SECTION_LOSS_LOG bool "Enable DVB demux section packet loss log" depends on DVB_CORE help Enable extra log messages meant to detect packet loss inside the Kernel.
Should not be enabled on normal cases, as logs can
be very verbose.
If you are unsure about this, say N here.
config DVB_ULE_DEBUG bool "Enable DVB net ULE packet debug messages" depends on DVB_CORE help Enable extra log messages meant to detect problems while handling DVB network ULE packet loss inside the Kernel.
Should not be enabled on normal cases, as logs can
be very verbose.
If you are unsure about this, say N here.