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Puthikorn Voravootivat 560a758d39 drm/i915: Add heuristic to determine better way to adjust brightness
Add heuristic to decide that AUX or PWM pin should use for
backlight brightness adjustment and modify i915 param description
to have auto, force disable, and force enable.

The heuristic to determine that using AUX pin is better than using
PWM pin is that the panel support any of the feature list here.
- Regional backlight brightness adjustment
- Backlight PWM frequency set
- More than 8 bits resolution of brightness level
- Backlight enablement via AUX and not by BL_ENABLE pin

Signed-off-by: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170622190339.142671-3-puthik@chromium.org
2017-06-23 12:24:49 +02:00
arch powerpc fixes for 4.12 #4 2017-05-27 09:28:34 -07:00
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Documentation Linux 4.12-rc3 2017-05-30 15:54:15 +10:00
drivers drm/i915: Add heuristic to determine better way to adjust brightness 2017-06-23 12:24:49 +02:00
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include drm/i915: Allow execbuffer to use the first object as the batch 2017-06-16 16:54:05 +01:00
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kernel Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-27 09:14:24 -07:00
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sound Linux 4.12-rc3 2017-05-30 15:54:15 +10:00
tools powerpc fixes for 4.12 #4 2017-05-27 09:28:34 -07:00
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MAINTAINERS Linux 4.12-rc3 2017-05-30 15:54:15 +10:00
Makefile Linux 4.12-rc3 2017-05-28 17:20:53 -07:00
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.