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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>
43 lines
1.3 KiB
Text
43 lines
1.3 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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config VIDEO_VIVID
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tristate "Virtual Video Test Driver"
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depends on VIDEO_DEV && !SPARC32 && !SPARC64 && FB
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depends on HAS_DMA
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select FONT_SUPPORT
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select FONT_8x16
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select FB_CFB_FILLRECT
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select FB_CFB_COPYAREA
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select FB_CFB_IMAGEBLIT
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select VIDEOBUF2_VMALLOC
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select VIDEOBUF2_DMA_CONTIG
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select VIDEO_V4L2_TPG
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select MEDIA_CONTROLLER
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select MEDIA_CONTROLLER_REQUEST_API
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help
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Enables a virtual video driver. This driver emulates a webcam,
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TV, S-Video and HDMI capture hardware, including VBI support for
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the SDTV inputs. Also video output, VBI output, radio receivers,
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transmitters and software defined radio capture is emulated.
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It is highly configurable and is ideal for testing applications.
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Error injection is supported to test rare errors that are hard
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to reproduce in real hardware.
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Say Y here if you want to test video apps or debug V4L devices.
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When in doubt, say N.
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config VIDEO_VIVID_CEC
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bool "Enable CEC emulation support"
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depends on VIDEO_VIVID
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select CEC_CORE
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help
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When selected the vivid module will emulate the optional
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HDMI CEC feature.
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config VIDEO_VIVID_MAX_DEVS
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int "Maximum number of devices"
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depends on VIDEO_VIVID
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default "64"
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help
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This allows you to specify the maximum number of devices supported
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by the vivid driver.
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