613cbb91e9
The CSI2 specification specifies a standard method to access camera sensor registers called "Camera Control Interface (CCI)". This uses either 8 or 16 bit (big-endian wire order) register addresses and supports 8, 16, 24 or 32 bit (big-endian wire order) register widths. Currently a lot of Linux camera sensor drivers all have their own custom helpers for this, often copy and pasted from other drivers. Add a set of generic helpers for this so that all sensor drivers can switch to a single common implementation. These helpers take an extra optional "int *err" function parameter, this can be used to chain a bunch of register accesses together with only a single error check at the end, rather than needing to error check each individual register access. The first failing call will set the contents of err to a non 0 value and all other calls will then become no-ops. Link: https://lore.kernel.org/linux-media/59aefa7f-7bf9-6736-6040-39551329cd0a@redhat.com/ Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Tested-by: Tommaso Merciai <tomm.merciai@gmail.com> Reviewed-by: Tommaso Merciai <tomm.merciai@gmail.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
101 lines
2.0 KiB
Plaintext
101 lines
2.0 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Generic video config states
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#
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config VIDEO_V4L2_I2C
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bool
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depends on I2C && VIDEO_DEV
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default y
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config VIDEO_V4L2_SUBDEV_API
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bool
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depends on VIDEO_DEV && MEDIA_CONTROLLER
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help
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Enables the V4L2 sub-device pad-level userspace API used to configure
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video format, size and frame rate between hardware blocks.
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This API is mostly used by camera interfaces in embedded platforms.
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config VIDEO_ADV_DEBUG
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bool "Enable advanced debug functionality on V4L2 drivers"
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help
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Say Y here to enable advanced debugging functionality on some
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V4L devices.
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In doubt, say N.
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config VIDEO_FIXED_MINOR_RANGES
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bool "Enable old-style fixed minor ranges on drivers/video devices"
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help
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Say Y here to enable the old-style fixed-range minor assignments.
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Only useful if you rely on the old behavior and use mknod instead of udev.
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When in doubt, say N.
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# Used by drivers that need tuner.ko
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config VIDEO_TUNER
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tristate
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# Used by drivers that need v4l2-jpeg.ko
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config V4L2_JPEG_HELPER
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tristate
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# Used by drivers that need v4l2-h264.ko
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config V4L2_H264
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tristate
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# Used by drivers that need v4l2-vp9.ko
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config V4L2_VP9
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tristate
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# Used by drivers that need v4l2-mem2mem.ko
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config V4L2_MEM2MEM_DEV
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tristate
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depends on VIDEOBUF2_CORE
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# Used by LED subsystem flash drivers
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config V4L2_FLASH_LED_CLASS
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tristate "V4L2 flash API for LED flash class devices"
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depends on VIDEO_DEV
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depends on LEDS_CLASS_FLASH
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select MEDIA_CONTROLLER
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select V4L2_ASYNC
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select VIDEO_V4L2_SUBDEV_API
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help
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Say Y here to enable V4L2 flash API support for LED flash
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class drivers.
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When in doubt, say N.
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config V4L2_FWNODE
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tristate
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select V4L2_ASYNC
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config V4L2_ASYNC
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tristate
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config V4L2_CCI
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tristate
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config V4L2_CCI_I2C
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tristate
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depends on I2C
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select REGMAP_I2C
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select V4L2_CCI
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# Used by drivers that need Videobuf modules
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config VIDEOBUF_GEN
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tristate
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config VIDEOBUF_DMA_SG
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tristate
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select VIDEOBUF_GEN
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config VIDEOBUF_VMALLOC
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tristate
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select VIDEOBUF_GEN
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config VIDEOBUF_DMA_CONTIG
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tristate
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select VIDEOBUF_GEN
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