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This reverts commit560a758d39. The DPCD backlight commits regress a Thinkpad X1 Carbon 4th Gen and a BXT-P (in CI). Enabling dynamic backlight boots to a black screen, and enabling DPCD backlight leads to a black screen after suspend/resume. References: http://mid.mail-archive.com/20170706135349.6tu3lz7uehazlnnn@boom References: http://mid.mail-archive.com/20170627132326.f2q3yn4bh5flji4q@boom Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101619 Reported-by: David Weinehall <david.weinehall@linux.intel.com> Fixes:560a758d39("drm/i915: Add heuristic to determine better way to adjust brightness") Cc: Jenny TC <jenny.tc@intel.com> Cc: David Weinehall <david.weinehall@linux.intel.com> Cc: Puthikorn Voravootivat <puthik@chromium.org> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: intel-gfx@lists.freedesktop.org Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/f49a89a05f18e90871c2eeadcdcd783ac7961cdf.1500542254.git.jani.nikula@intel.com
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.