intel_extreme: implement get_preferred_mode for vbt on mobile

this avoids searching in edid information in this case.

Change-Id: I330341f089f71cd5de657a6630b5414d02db771f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4749
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

Support for configuring screen backlight

Accelerant interface:
Introduce new hooks B_SET_BRIGHTNESS and B_GET_BRIGHTNESS. Brightness is
a float in the 0..1 range.

App_server:
Forward brightness things between BScreen and the accelerant.

intel_extreme:
Implement the hooks. Note that this only works for laptop panels, but
the driver will pretend to support it in other cases as well.

Screen preferences:
If the accelerant supports the B_GET_BRIGHTNESS hook, allow to set
brightness with a slider. Otherwise, the slidere is hidden and these
changes aren't visible.

Style cleanups only, no functional change.
* Make the pointer style consistent accross all components, which should make it
easier when working all over the place.
* 80 char limits.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42863 a95241bf-73f2-0310-859d-f6bbb57e9c96

Revert wrongly committed files.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36244 a95241bf-73f2-0310-859d-f6bbb57e9c96

Work in progress of a Radeon HD 3200 driver to change the display mode (status when I leave the coding spring). At least it shows a picture but with a wrong scaling.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36243 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the way the device type is tested/set. There shouldn't be any functional
changes.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32353 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Now uses the new create_display_modes() function.
* Now supports the new B_GET_EDID_INFO hook under Haiku.
* Fixed build under BeOS.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22551 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed PLL timing computation for the i9xx chips - I mixed post2 min/max values, and did
not take the VCO limits into account; both could (and would during testing) create invalid
frequencies.
* Also reverted the order in which the PLL divisors are traversed to match the order of what
is used in the X driver to create comparable output (our error computation is based on float,
though, and should therefore create more accurate values).
* The i965 introduced a special register for the surface; the former display base register
is now only used for the view offset. Instead of setting the base manually here and there,
there is now a set_frame_buffer_base() function.
* The DPMS code will now also turn off/on the PLL clock generator.
* The code needs some more cleanup, and while the driver now produces the correct timing on
my i965 system, I'm now greeted by a black screen after startup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22289 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Prepared having hardware cursor support; got quite complicated because there
is no good (or reliable) way to retrieve the physical address of "stolen"
(by the BIOS) graphics memory.
* Implemented allocation of additional graphics memory in case the BIOS was
a bit too cheap. We now guarantee 8 MB of memory available to the graphics
chip - would be nicer to only allocate that on demand, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17433 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented overlay management. The hardware doesn't notice them yet, though :)
(but the app_server thinks they're working).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17242 a95241bf-73f2-0310-859d-f6bbb57e9c96

Very basic driver for the "Intel Extreme Graphics 2" chips, only supports i865G for now.
Only mode switches do work, doesn't yet make sure the mode is valid, though.
At this point, this driver only works on Haiku, the R5 app_server is crashing for some
reason I need to investigate some day (maybe tomorrow :)).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16872 a95241bf-73f2-0310-859d-f6bbb57e9c96

Style cleanups only, no functional change.
* Make the pointer style consistent accross all components, which should make it
easier when working all over the place.
* 80 char limits.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42863 a95241bf-73f2-0310-859d-f6bbb57e9c96

Revert wrongly committed files.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36244 a95241bf-73f2-0310-859d-f6bbb57e9c96

Work in progress of a Radeon HD 3200 driver to change the display mode (status when I leave the coding spring). At least it shows a picture but with a wrong scaling.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36243 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed the way the device type is tested/set. There shouldn't be any functional
changes.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32353 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Now uses the new create_display_modes() function.
* Now supports the new B_GET_EDID_INFO hook under Haiku.
* Fixed build under BeOS.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22551 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed PLL timing computation for the i9xx chips - I mixed post2 min/max values, and did
not take the VCO limits into account; both could (and would during testing) create invalid
frequencies.
* Also reverted the order in which the PLL divisors are traversed to match the order of what
is used in the X driver to create comparable output (our error computation is based on float,
though, and should therefore create more accurate values).
* The i965 introduced a special register for the surface; the former display base register
is now only used for the view offset. Instead of setting the base manually here and there,
there is now a set_frame_buffer_base() function.
* The DPMS code will now also turn off/on the PLL clock generator.
* The code needs some more cleanup, and while the driver now produces the correct timing on
my i965 system, I'm now greeted by a black screen after startup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22289 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Prepared having hardware cursor support; got quite complicated because there
is no good (or reliable) way to retrieve the physical address of "stolen"
(by the BIOS) graphics memory.
* Implemented allocation of additional graphics memory in case the BIOS was
a bit too cheap. We now guarantee 8 MB of memory available to the graphics
chip - would be nicer to only allocate that on demand, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17433 a95241bf-73f2-0310-859d-f6bbb57e9c96

Implemented overlay management. The hardware doesn't notice them yet, though :)
(but the app_server thinks they're working).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17242 a95241bf-73f2-0310-859d-f6bbb57e9c96

Very basic driver for the "Intel Extreme Graphics 2" chips, only supports i865G for now.
Only mode switches do work, doesn't yet make sure the mode is valid, though.
At this point, this driver only works on Haiku, the R5 app_server is crashing for some
reason I need to investigate some day (maybe tomorrow :)).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16872 a95241bf-73f2-0310-859d-f6bbb57e9c96