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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>
25 lines
762 B
Text
25 lines
762 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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config VIDEO_COBALT
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tristate "Cisco Cobalt support"
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depends on VIDEO_DEV && I2C
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depends on PCI_MSI && MTD_COMPLEX_MAPPINGS
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depends on (GPIOLIB && DRM_I2C_ADV7511=n) || COMPILE_TEST
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depends on SND
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depends on MTD
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select MEDIA_CONTROLLER
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select VIDEO_V4L2_SUBDEV_API
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select I2C_ALGOBIT
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select SND_PCM
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select VIDEO_ADV7604
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select VIDEO_ADV7511
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select VIDEO_ADV7842
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select VIDEOBUF2_DMA_SG
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help
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This is a video4linux driver for the Cisco PCIe Cobalt card.
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This board is sadly not available outside of Cisco, but it is
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very useful as an example of a real driver that uses all the
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latest frameworks and APIs.
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To compile this driver as a module, choose M here: the
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module will be called cobalt.
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