[coreboot] Intel G41 - Asrock G41M-GS: no coreboot screen output from Intel GPU on VGA

[h42 at memeware.net]

Cherry picking did not worked for me. I cloned coreboot today on an new 
linux installation.
So i did additional:
$ cd 3rdparty/libgfxinit/
$ git checkout master
$ cd -
$ git add 3rdparty/libgfxinit/

Then i build the buildroot and the coreboot image.
I think i should have the patch (and some other things that was merged 
in between) now inside the image. But i still dont have any seabios 
output on the screen. I am using seabios master.

Then i tried out linear (high resolution) framebuffer.
I got that when building:
...
     CC         ramstage/drivers/intel/wifi/wifi.o
     GCC        ramstage/drivers/intel/gma/hires_fb/gma.o
gma.adb:78:59: expected type "Interfaces.Integer_16"
gma.adb:78:59: found type "Interfaces.Integer_32"
gma.adb:79:59: expected type "Interfaces.Integer_16"
gma.adb:79:59: found type "Interfaces.Integer_32"
Makefile:338: recipe for target 
'build/ramstage/drivers/intel/gma/hires_fb/gma.o' failed
make: *** [build/ramstage/drivers/intel/gma/hires_fb/gma.o] Error 1


On 2018-08-23 18:11, Nico Huber wrote:
> Hello H42,
> 
> there is an issue with upscaling VGA text mode on G4x that is about to
> be fixed [1]. Looking at your logs again, you are likely also affected
> (scaling 640x400 to 1920x1080). The fix is already merged to the lib-
> gfxinit repository, but the submodule pointer in coreboot is not 
> updated
> yet. You can try the fix as follows:
> 
>   $ cd 3rdparty/libgfxinit/
>   $ git fetch https://review.coreboot.org/libgfxinit 
> refs/changes/55/28255/3
>   $ git cherry-pick FETCH_HEAD
>   $ cd -
>   $ git add 3rdparty/libgfxinit/
> 
> Then rebuild your coreboot.
> 
> Hope that fixes your issue. Another workaround would be to use a linear
> framebuffer instead of text mode (CONFIG_GENERIC_LINEAR_FRAMEBUFFER).
> 
> Nico
> 
> [1] https://review.coreboot.org/28255