linux/hdmi.h: Split out logic into .c file.

Shoulda done this ages ago.

only build linux_acpi.c if we have acpi(4) in the kernel

drm: Move acpi_check_dsm &c. from intel_acpi.c to new linux_acpi.c.

drm: Move io_mapping to very own .c file.

drm: linux kthread stubs

linux: Rename linux_sg.c -> linux_sgt.c.

Avoids collision with compat_linux.

linux: Kludgey radix tree shims

linux: Draft half-arsed xarray shims

linux: dma fence array stubs

linux: Draft irq_work shims, in terms of a softint.

Doesn't actually run in hardirq context, but who's gonna notice...

i915: more work

drm: Another pass over i915 and some supporting logic.

This makes a shim around sg_table, which essentially represents two
things:

1. an array of pages (roughly corresponding to bus_dma_segment_t[])
2. an array of DMA addresses stored in a bus_dmamap_t

Both parts are optional; different parts of i915 use sg_tables to
pass around one or both of the two parts. This helps to reduce the
ifdefs by quite a bit, although it's not always clear which part of
an sg_table any particular interface is actually using which is why I
was reluctant to do this before.

linux compat: Draft hrtimer shims.

(not actually high-resolution, just a wrapper around callout(9))

linux: Draft rwsem with bodgy semantics.

Narrow the CPPFLAGS for drm subsystems.

No need for the whole kernel to be built with -I flags for the drm
header files.

Move Linux firmware shims to their own .c file.

dma fence chain stubs

backlight stubs

Draft sync_file.

Rename reservation_object -> dma_resv.

Move Linux SRCU to common.

Draft stop_machine. Hope the callback runs quickly under splhigh...

Move Linux RCU to common.

linux/wait_bit.h

Draft SRCU implementation.

Rename fence -> dma_fence, step 2: files files.

Draft support for drm prime.

Hash-locked atomic64 to give ports like powerpc32 a chance at radeon.

Move the Linux PCI shim into its very own .c file.

The poor thing has deserved this for a very long time, even though it
is full of kludges. Also I'm tired of recompiling everything every
time I touch it.

Sort.

Draft implementation of the Linux reservation and fence APIs.

Implement some of the Linux RCU API.

Sort in the standard English alphabetical order, please.

Sort.

branches: 1.9.16; 1.9.18;
Move linux_work.c and workqueue.h from sys/external/bsd/drm2 to
sys/external/common so that they can be used by others.

LGTM from riastradh@

These should really live outside sys/external, but that can be decided
later

Move Linux ww_mutex code into a .c file where it belongs.

branches: 1.7.2; 1.7.4; 1.7.6;
Remove needless linux_gfp.c.

Trying to make do with Linux's page allocation interface is pretty
much always wrong: either we let uvm allocate pages in uvm objects
for us, or we use bus_dma.

Make it build and boot on my test machines.

Screen blanks on boot on the Ivy Bridge system with

DRM error in cpt_serr_int_handler: PCH transcoder A FIFO underrun

But after that everything is OK. Appears to be an upstream problem.
To investigate...

I think there's a cache flushing issue somewhere -- there are little
display artefacts on my T60.

branches: 1.5.2; 1.5.4;
Implement Linux dmi_check_system API.

Use it to get a Thinkpad quirk for i915 graphics.

Patch from nonoka@, PR 48708.

branches: 1.4.2;
Make drmkms find header files from sys/external/bsd/common.

Move the drmkms i2c dependencies to where they belong.

Merge riastradh-drm2 to HEAD.

branches: 1.1.2;
file files.drmkms_linux was initially added on branch riastradh-drm2.