Re: [PATCH] OMAP: DSS: DPI: disable vt-switch on suspend/resume.

Hi!

quoted

Looking at the drivers/tty/vt/vt_ioctl.c, it sounds to me that we should
always do pm_set_vt_switch(0), as omapdss restores everything just fine
on resume. Although it makes me wonder how it works if there are two
display controllers, one needing the switch and the other not...

I wondered that too.  It would seem to make more sense for
pm_set_vt_switch(0) to be the default, that drivers which need the textmode
switch should call (1).  But I suspect there are "historical reasons" for the
current situation.

Well... historically, we did not have drivers for graphics cards --
kernel did not know how to handle it, only X knew. For cards that do
not have kernel driver, only X one, we need to switch vts.

For cards that have proper driver, we should be able to survive
without VT switch.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html