radeon_hd: update DP definitions to match the spec

Change-Id: Ib653fcf3fef26e17e801ee016e94787c67a64e3c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5173
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

radeon_hd/dp: Fix bug in lane training. Kudos gcc7

* GCC7's static analysis found this one and it still
took #gcc and me a while to spot. Nice work gcc7!
* Should help DisplayPort training issues :-)

Change-Id: I9b47f13c95e622a2c08ff329ec9c3fc7e3db493d

radeon_hd: Drop dp config array from dp_info

* Caching these values could result in missed
state changes.
* We may want to re-implement later.
* Highlights that all DP AUX communication is broken
during my testing.

radeon_hd: Add missing DP STATUS request type

* Name change inline with DP specifications.

intel_extreme: Prepare for DisplayPort AUX comms

radeon_hd: Fix dp aux request / response shifts

radeon_hd: Better tracing. Fix DP ack bitwise shift

radeon_hd: Add DP link_train_ce

* First attempts at DisplayPort link training
clock equalization.
* Add DP define to detect equalization state
* Working towards resolving #8626

radeon_hd: Complete move to common DisplayPort header

* Non-spec DP stuff in accelerant displayport.h
* Common DisplayPort header still has TODO's however

dp_raw: Continued cleanup of DisplayPort common header

* Reduce number of common DP registers in radeon_hd
* Move to bitwise shifts as they will make more
sense to more people in the long-run

radeon_hd: Begin to widdle down DP to common code

dp_raw: Add AUX communication defines

dp_raw common: Style fix, no change.

common header: Add work in progress DisplayPort header

* Obtained via DportV1.1.pdf
* Written based on my Xorg membership

radeon_hd: Fix dp aux request / response shifts

radeon_hd: Better tracing. Fix DP ack bitwise shift

radeon_hd: Add DP link_train_ce

* First attempts at DisplayPort link training
clock equalization.
* Add DP define to detect equalization state
* Working towards resolving #8626

radeon_hd: Complete move to common DisplayPort header

* Non-spec DP stuff in accelerant displayport.h
* Common DisplayPort header still has TODO's however

dp_raw: Continued cleanup of DisplayPort common header

* Reduce number of common DP registers in radeon_hd
* Move to bitwise shifts as they will make more
sense to more people in the long-run

radeon_hd: Begin to widdle down DP to common code

dp_raw: Add AUX communication defines

dp_raw common: Style fix, no change.

common header: Add work in progress DisplayPort header

* Obtained via DportV1.1.pdf
* Written based on my Xorg membership