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98913408c5
Several entries at the stable ABI files won't parse if we pass them directly to the ReST output. Adjust them, in order to allow adding their contents as-is at the stable ABI book. Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/467a0dfbcdf00db710a629d3fe4a2563750339d8.1604042072.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
57 lines
1.9 KiB
Text
57 lines
1.9 KiB
Text
What: /sys/class/backlight/<backlight>/bl_power
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Date: April 2005
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KernelVersion: 2.6.12
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Contact: Richard Purdie <rpurdie@rpsys.net>
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Description:
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Control BACKLIGHT power, values are FB_BLANK_* from fb.h
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- FB_BLANK_UNBLANK (0) : power on.
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- FB_BLANK_POWERDOWN (4) : power off
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Users: HAL
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What: /sys/class/backlight/<backlight>/brightness
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Date: April 2005
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KernelVersion: 2.6.12
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Contact: Richard Purdie <rpurdie@rpsys.net>
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Description:
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Control the brightness for this <backlight>. Values
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are between 0 and max_brightness. This file will also
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show the brightness level stored in the driver, which
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may not be the actual brightness (see actual_brightness).
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Users: HAL
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What: /sys/class/backlight/<backlight>/actual_brightness
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Date: March 2006
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KernelVersion: 2.6.17
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Contact: Richard Purdie <rpurdie@rpsys.net>
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Description:
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Show the actual brightness by querying the hardware.
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Users: HAL
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What: /sys/class/backlight/<backlight>/max_brightness
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Date: April 2005
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KernelVersion: 2.6.12
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Contact: Richard Purdie <rpurdie@rpsys.net>
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Description:
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Maximum brightness for <backlight>.
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Users: HAL
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What: /sys/class/backlight/<backlight>/type
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Date: September 2010
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KernelVersion: 2.6.37
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Contact: Matthew Garrett <mjg@redhat.com>
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Description:
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The type of interface controlled by <backlight>.
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"firmware": The driver uses a standard firmware interface
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"platform": The driver uses a platform-specific interface
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"raw": The driver controls hardware registers directly
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In the general case, when multiple backlight
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interfaces are available for a single device, firmware
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control should be preferred to platform control should
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be preferred to raw control. Using a firmware
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interface reduces the probability of confusion with
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the hardware and the OS independently updating the
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backlight state. Platform interfaces are mostly a
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holdover from pre-standardisation of firmware
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interfaces.
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