radeon_hd: Add missing USB C connector type

* Solves a few "Unknown connector" errors on newer cards.
* It's just another physical name for DisplayPort

Change-Id: I37a6f1bb1db66279b305bdbce3c200612eac1130
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7042
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

radeon_hd: Add new connector id, guard from reading over bounds

Change-Id: Ifbabcf8217c617baffe85f24b985c18760e4da58
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5527
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

radeon_hd: Properly and consistently pick HPD ID

radeon_hd: More gpio rework

* Bump i2c data into it's own struct
* Populate gGPIOInfo with general gpio pins
(for things like HPD, and voltage control)
* Attach HPD gpio pins to connectors
* Dump trace info of HPD pins as well as i2c pins

radeon_hd: Rework gpio pins

* There are GPIO pins for hotplug interrupts and i2c
communications (for edid). Add two fields to connector
(index for each in gGPIOInfo).
* DP aux communcation seems to want the hotplug GPIO pin
info, which we don't get (I think this is why DP AUX comms
is broken at the moment)
* GPIO LUT seems to know about a wide range of GPIO pins, while
the i2c gpio calls only know about the ones needed for i2c.
* I'm tempted to populate gGPIOInfo with the LUT pins and
then suplement that data with the i2c GPIO pins data.
(however, not sure how many pins there are generally defined
so it could impact performance. More investigation is needed)
This would reverse how it works now with this commit.

radeon_hd: Implement preferred mode

* Add preferredMode display mode to each display.
* If LVDS is detected, set preferredMode based on AtomBIOS
* Fixes blocker #8329 ?

radeon_hd: LVDS AtomBIOS mode reading

* This isn't done, but all we need to do now is create
a simulated edid struct for LVDS screens.

Working towards DP connector support

* Lots of new DisplayPort functions
* Call DP link training during mode set
* Rename dp_info variables to be less redundant
* Make encoder_pick_dig accept connector ID and
then check parent display
* Encode/Decode DP link speed functions
* Calculate DP lanes
* Rewrite encoder_dig_setup
* Correct bitsPerChannel to bitsPerColor
* My TRAVIS DisplayPort -> LVDS bridge now works

GPIO info struct style cleanup, (hopefully) no functional change

Introduce new displayport source file

* Move existing displayport functions to new source file
* Move was done due to large amount of DP code
* Style fixes
* Stub out new DP link training function

Style cleanup. Variable rename, fill out IGP TODO a little better

Pointer style cleanup; Variable consolidation

Include file style cleanup, no functional change

Add i2c DP AUX communication calls

* remove posix return
* pass GPIO hwLine through vs connector index
* variable scope cleanup
* make lowest level dp aux AtomBIOS call static, non-public
as it is always called by connector code

Add calls to read and write data from AUX connector

* clean up previously changed error returns in 8c01b4. For
some reason I thought B_ERROR was the only non-positive
status.
* add VESA DisplayPort defines. Only a subset so it's local
to radeon_hd for now.
* this completes basic AUX transaction code, still untested

Speak aux data via AtomBIOS call

* add function to speak DP AUX data via AtomBIOS call
* clean up connector index variable names

Move connector code into new connector source file.

* clean up some comments
* most of this movement is prep for AUX display transactions

Create connector source file, move connector bus calls into it

* this will help break apart some of the sources
* display bus communications really don't belong with GPU operations
* rename functions to better describe their actions

radeon_hd: Properly and consistently pick HPD ID

radeon_hd: More gpio rework

* Bump i2c data into it's own struct
* Populate gGPIOInfo with general gpio pins
(for things like HPD, and voltage control)
* Attach HPD gpio pins to connectors
* Dump trace info of HPD pins as well as i2c pins

radeon_hd: Rework gpio pins

* There are GPIO pins for hotplug interrupts and i2c
communications (for edid). Add two fields to connector
(index for each in gGPIOInfo).
* DP aux communcation seems to want the hotplug GPIO pin
info, which we don't get (I think this is why DP AUX comms
is broken at the moment)
* GPIO LUT seems to know about a wide range of GPIO pins, while
the i2c gpio calls only know about the ones needed for i2c.
* I'm tempted to populate gGPIOInfo with the LUT pins and
then suplement that data with the i2c GPIO pins data.
(however, not sure how many pins there are generally defined
so it could impact performance. More investigation is needed)
This would reverse how it works now with this commit.

radeon_hd: Implement preferred mode

* Add preferredMode display mode to each display.
* If LVDS is detected, set preferredMode based on AtomBIOS
* Fixes blocker #8329 ?

radeon_hd: LVDS AtomBIOS mode reading

* This isn't done, but all we need to do now is create
a simulated edid struct for LVDS screens.

Working towards DP connector support

* Lots of new DisplayPort functions
* Call DP link training during mode set
* Rename dp_info variables to be less redundant
* Make encoder_pick_dig accept connector ID and
then check parent display
* Encode/Decode DP link speed functions
* Calculate DP lanes
* Rewrite encoder_dig_setup
* Correct bitsPerChannel to bitsPerColor
* My TRAVIS DisplayPort -> LVDS bridge now works

GPIO info struct style cleanup, (hopefully) no functional change

Introduce new displayport source file

* Move existing displayport functions to new source file
* Move was done due to large amount of DP code
* Style fixes
* Stub out new DP link training function

Style cleanup. Variable rename, fill out IGP TODO a little better

Pointer style cleanup; Variable consolidation

Include file style cleanup, no functional change

Add i2c DP AUX communication calls

* remove posix return
* pass GPIO hwLine through vs connector index
* variable scope cleanup
* make lowest level dp aux AtomBIOS call static, non-public
as it is always called by connector code

Add calls to read and write data from AUX connector

* clean up previously changed error returns in 8c01b4. For
some reason I thought B_ERROR was the only non-positive
status.
* add VESA DisplayPort defines. Only a subset so it's local
to radeon_hd for now.
* this completes basic AUX transaction code, still untested

Speak aux data via AtomBIOS call

* add function to speak DP AUX data via AtomBIOS call
* clean up connector index variable names

Move connector code into new connector source file.

* clean up some comments
* most of this movement is prep for AUX display transactions

Create connector source file, move connector bus calls into it

* this will help break apart some of the sources
* display bus communications really don't belong with GPU operations
* rename functions to better describe their actions