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: dev->dma_lock doesn't exist

drm cleanup 01/x: Move legacy buffer structs to drm_leagcy.h

As was done in Linux v3.18 commit:
ba8286fab52652e431784d066b075c1bb4933ea1

This cleans drmP.h header a bit.

While there, move LOCK_TES

drm cleanup 01/x: Move legacy buffer structs to drm_leagcy.h

As was done in Linux v3.18 commit:
ba8286fab52652e431784d066b075c1bb4933ea1

This cleans drmP.h header a bit.

While there, move LOCK_TEST_WITH_RETURN macro too.

No functional change intended.

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drm/i915: Update to Linux 3.18

* Revamped, more robust vblank handling

* More paranoid pageflips, with added error detection and recovery logic

* Lots of Cherryview improvements, including runtime

drm/i915: Update to Linux 3.18

* Revamped, more robust vblank handling

* More paranoid pageflips, with added error detection and recovery logic

* Lots of Cherryview improvements, including runtime power management
and better eDP panel support

* Lots of Broadwell improvements. GPU commands can now be submitted via
a new execlist mechanism

* Preparatory work for Skylake support

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drm: Fix drm_ioctl error return values.

Fixes some cases where we accidentally returned a negative value
from drm_ioctl().
Also this change converts the ERESTARTSYS error value to EINTR, before
retu

drm: Fix drm_ioctl error return values.

Fixes some cases where we accidentally returned a negative value
from drm_ioctl().
Also this change converts the ERESTARTSYS error value to EINTR, before
returning it to userspace.

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drm - Fix improper M_NOWAIT usage

* Remove numerous mis-uses of M_NOWAIT, replacing with M_WAITOK | M_NULLOK.

drm: Consolidate memory allocation types

* The DRM subsystem was using many different kmalloc types for no
good reason

* Some types were only used twice (1x kmalloc() and 1x kfree() calls)

* Rem

drm: Consolidate memory allocation types

* The DRM subsystem was using many different kmalloc types for no
good reason

* Some types were only used twice (1x kmalloc() and 1x kfree() calls)

* Remove that useless complexity and only keep one kmalloc type for
the whole DRM subsystem and its drivers

Inspired-by: OpenBSD

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kernel/spinlock: Add a description to struct spinlock.

And add it to spin_init() and SPINLOCK_INITIALIZER().

Submitted-by: dclink (see <http://bugs.dragonflybsd.org/issues/2714>)
OK'd-by: dill

kernel/spinlock: Add a description to struct spinlock.

And add it to spin_init() and SPINLOCK_INITIALIZER().

Submitted-by: dclink (see <http://bugs.dragonflybsd.org/issues/2714>)
OK'd-by: dillon

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drm: Use an include directory hierarchy similar to the Linux one

drm: Merge the drm and drm2 implementations

* Move the drm2 i915 driver to sys/dev/drm/i915kms

* The legacy i915 driver remains untouched

* Only sys/dev/drm/ shall remain

Sync DRM code with FreeBSD trunk rev 190433.

DRM update to git snapshot from 2008-01-04.