Hello Jan,
I think you asked about this on IRC yesterday. The first file that you
mention is part of the Linux drm driver (the rest is the other files in
that folder). I wrote the driver, based on in-kernel ones, but I am not
an expert in the kernel drm subsystem, and in particular I only use the
basic kernel fbdev translation functions to provide the framebuffer
driver. You would probably be better asking on the dri-devel list<1>
about what to change to get one fbdev device per head. You might be in
luck and there might be a simple solution.
Regards,
Michael
<1> https://lists.freedesktop.org/mailman/listinfo/dri-devel
On 05.09.2016 17:42, Jan Petrouš wrote:
Hi,
as VirtualBox supports dual head config I was trying to start two
framebuffers on it.
But unsucessfull.
The main constraint is that guest Linux is very tiny and has no
X-Windows inside.
The application requires only the framebuffer devices.
I did many hours googling to find solution but I found only solution for
xwin environment.
Is it even possible to enable two FB devices on dualhead configuration?
If the answer is NO, can you show me where I should start to look inside
the sources?
I found the VB Additions subversion repo where are at least two video
drivers:
1,
http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Additions/linux/drm/vbox_fb.c
2,
http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Additions/x11/vboxvideo/vboxvideo.c
I guess that the driver for my non-x11 environment is the first one. Is
it true?
I'm rather linux video driver noob, but I would like to get some good
start point
where I can at least try to start with.
BR.
/Jan
PS: Installed Fedora Server 24 Minimal config, so kernel is 4.6.7
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