drm: Update to Linux 4.12.14

* Initial Geminilake support

* Support improvements and model-specific bug fixes for Broxton, Haswell,
Broadwell, Skylake and Kabylake hardware

* Various generic i91

drm: Update to Linux 4.12.14

* Initial Geminilake support

* Support improvements and model-specific bug fixes for Broxton, Haswell,
Broadwell, Skylake and Kabylake hardware

* Various generic i915 bug fixes, including page flipping and memory
corruption issues

* Minor radeon bug fixes

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drm: Update generic, ttm and radeon code to Linux 4.9

* Generally cleanup non driver-specific code and increase its
robustness

* DisplayPort support improvements

* Atomic modesetting improvement

drm: Update generic, ttm and radeon code to Linux 4.9

* Generally cleanup non driver-specific code and increase its
robustness

* DisplayPort support improvements

* Atomic modesetting improvements

* Radeon performance and stability improvements

* drm/i915 stays based on Linux 4.7.10 with Linux 4.19 changes
for now

Reviewed-by: Romick

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drm/ttm: Sync with Linux 3.16

drm/linux/rbtree.h: Rename RB_ROOT to LINUX_RB_ROOT

Preventing clashes with the more general RB_ROOT kernel definition

drm: Sync a few headers with Linux 4.4

drm/i915: Update to Linux 4.4

* Broxton and Skylake support improvements

* Cherryview specific fixes

* Atomic modesetting conversion progress

* Improved validation of video modes. Some low-power

drm/i915: Update to Linux 4.4

* Broxton and Skylake support improvements

* Cherryview specific fixes

* Atomic modesetting conversion progress

* Improved validation of video modes. Some low-power chips can't
drive all DP screens and this is now detected by the driver.

* PSR and FBC improvements and bug fixes

* Workarounds for some specific HDMI monitors needing more time than
allowed by the spec to handle hot-plug events

* As usual, various fixes for little issues here and there

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drm/i915: Update to Linux 3.14

Changes specific to the DragonFly driver:

* Most GEM code paths are now similar to Linux, leading to increased
stability and performance.
Making this change was g

drm/i915: Update to Linux 3.14

Changes specific to the DragonFly driver:

* Most GEM code paths are now similar to Linux, leading to increased
stability and performance.
Making this change was greatly helped by studying the OpenBSD code.

* We were previously using legacy functions to set up page table entries and
this was starting to become a serious problem on particular platforms such
as gen4 or Broadwell. As of this commit, we now use the same chip-specific
virtual functions as Linux.

* RC6 and Frame Buffer Compression power savings enabled by default, depending
on the GPU family

Changes brought by the Linux 3.11 => 3.14 driver update:

* Various bug fixes on all GPU generations, especially stability improvements

* Power consumption improvements

* Many Valleyview/Baytrail support improvements

* The giant 128MB L4 cache is now enabled when present on Haswell

* Added support for Broadwell GPUs

* HDMI 4K support

* basic support for 3D/stereo displays on HDMI

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