[Bug 1823] Add new framebuffer ioctl to switch video modes

[bugzilla-daemon at rtems.org]

https://www.rtems.org/bugzilla/show_bug.cgi?id=1823

--- Comment #23 from Joel Sherrill <joel.sherrill at oarcorp.com> 2011-07-12 09:03:18 CDT ---
I don't see any ioctl's in linux/fb.h to set anything except the cursor.  Under
Linux, the driver author "knows better" than the user, thus no control over
details like this.  Ultimately, it can't be used as a model for RTEMS because
we assume the user is smart and may have a good reason to switch some settings. 

I recall the csb637 frame buffer hardware having a couple of buffering modes. 
This is not a unique capability.  

Is there a standard set of options for "SET BUFFER MODE" that may be found on
multiple video drivers?  

If we can define a set of standard buffering modes and associated constants,
then this makes sense to be generic.

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