* Detect PCH model based on ISA bridge and save
into shared info for later use.
* On CougarPoint PCH systems, assign pipes via
special CPT registers
* Drop HasPlatformControlHub as PCH should be
based on more than just generation.
* Move current_mode into the accelerant as the
driver doesn't care.
* Record panel_mode in driver and present to accelerant
* eDP, if no EDID and mobile, leave edid incomplete.
Mode set should notice that and fall back to panel_mode
* DisplayPort != DigitalPort
* i2c needs wrapped in DP AUX transaction code
* Mode-setting comes with DP link training as well
* We need to try and share DP code with radeon_hd
* polarity regs move on LVDS vs analog
* add knowledge or transcoder registers, they
exist seperately on PCH-split
* Native resolutions now work on LVDS under i965
* IvyBridge or higher can auto-train.
* Linux doesn't use this feature, however
manual FDI link training is *really*
complex... lets try auto-training first.
* I really hope we can kill head_mode some day
* Break pll code out from mode code
* The LVDS and Digital are smooshed together and
likely need broken apart.
* No impact to non-ValleyView chipsets
* Bump some register locations for VLV
* Only have HDMI port to test with on my ValleyView GPU
and our driver seems to be missing all HDMI and
sideband functionality.
* As ValleyView chipsets seem to be UEFI only, we don't
have VESA fallback, so this shouldn't cause regressions.
(unless we get UEFI framebuffer support)
Intel changed the PCH interrupt bits between Sandy Bridge and Ivy Bridge
to make space for the 3rd display pipe. Take this into account and check
for the correct bits on the newer devices.
Fixes#11522.
https://github.com/druga/haiku-stuff/tree/master/intel_extreme
Rebased against current sources.
* The BIOS video mode sometimes reports a scaled mode instead of the
physical panel dimensions. Get the data from the VBT table as well, and
use it if the reported resolution is bigger.
* On first boot, force the panel native mode so the user doesn't have to
set it manually.
* Only allow a single head at a time on i855gm, as the card can't drive
both heads at the same time.
* Detect when a new requested mode is the same as the current one, and
skip modesetting in that case. Avoids screen flickering when changing
workspaces.
* Fix some cases of misdetecting which pipes to enable
