Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC: r264832

- Sprinkle const and static as appropriate.
- Convert the remainder of snd_hda(4) to take advantage of nitems().
- Use DEVMETHOD_END.
- Use NULL instead of 0 for pointers.

MFC r258168, r258170:
Add some more Intel HDA controller and CODEC IDs.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Plug a memory leak.

Reviewed by: mav
Sponsored by: Nginx, Inc.

Add a few more translations from IDs to model name.

Submitted by: "4721@hushmail.com" <4721@hushmail.com>
Approved by: cperciva (implicit)
MFC after: 2 weeks

Add support for hdmi hda codec onboard nvidia gt 440 graphics card

PR: kern/174059
Submitted by: "4721@hushmail.com" <4721@hushmail.com>
Approved by: cperciva (implicit)
MFC after: 2 weeks

Print card and subsystem IDs in verbose logs to help to identify system.
Hide some less iseful messages under debug.

Remove extra semicolon.

Submitted by: emaste

Fix typo in r230571.

Submitted by: trasz

Add another bunch of CODEC IDs.

Print controller/codec IDs for unknown chips instead of useless and
frightening "unknown" word. In most cases we don't need to know chips
to properly handle them, but having IDs in logs may simplify debugging.

MFC after: 2 weeks
Sponsored by: iXsystems, Inc.

Two 192/24/8 playback streams overflow single mandatory output line (SDO)
of HDA bus. Handle that from two directions:
- Add support for "striping" (using several SDO lines), if supported.
- Account HDA bus utilization and return error on new stream allocation
attempt if remaining bandwidth is unsifficient.

Most of HDA controllers have one SDO line with 46Mbps output bandwidth.
NVIDIA GF210 has 2 lines - 92Mbps. NVIDIA GF520 has 4 lines - 184Mbps!

MFC after: 2 months
Sponsored by: iXsystems, Inc.

Major snd_hda driver rewrite:
- Huge old hdac driver was split into three independent pieces: HDA
controller driver (hdac), HDA CODEC driver (hdacc) and HDA sudio function
driver (hdaa).
- Support for multichannel recording was added. Now, as specification
defines, driver checks input associations for pins with sequence numbers
14 and 15, and if found (usually) -- works as before, mixing signals
together. If it doesn't, it configures input association as multichannel.
- Signal tracer was improved to look for cases where several DACs/ADCs in
CODEC can work with the same audio signal. If such case found, driver
registers additional playback/record stream (channel) for the pcm device.
- New controller streams reservation mechanism was implemented. That
allows to have more pcm devices then streams supported by the controller
(usually 4 in each direction). Now it limits only number of simultaneously
transferred audio streams, that is rarely reachable and properly reported
if happens.
- Codec pins and GPIO signals configuration was exported via set of
writable sysctls. Another sysctl dev.hdaa.X.reconfig allows to trigger
driver reconfiguration in run-time.
- Driver now decodes pins location and connector type names. In some cases
it allows to hint user where on the system case connectors, related to the
pcm device, are located. Number of channels supported by pcm device,
reported now (if it is not 2), should also make search easier.
- Added workaround for digital mic on some Asus laptops/netbooks.

MFC after: 2 months
Sponsored by: iXsystems, Inc.