olly at roomaroo
Jan 31, 2008, 3:11 PM
Views: 853
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Detecting video driver/chipset at runtime
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Hi
I've got a couple of tweaks that work around bugs in the official VIA
graphics drivers to enable mythfrontend to run on VIA CX700M2 based
boards (EPIA EX10000EG and EX15000EG).
The tweaks involve not testing for DRM vsync, because that will lock
the whole machine up, and not using I420 playback, cos it doesn't work
properly.
I'm trying to find a way to include these changes in the codebase
which won't be detrimental to users of other systems (i.e. every
mythtv user apart from about 3 of us). Ideally I'd do this by
detecting the graphics driver at runtime. I'd probably also need to
detect the chipset used to, since there seem to be plenty of users of
older VIA systems who don't have any problems.
I haven't been able to find any X calls that will do what I want,
which is fair enough since X should be abstracting all those details.
The closest I've managed to get is in
VideoOutputXv::GrabSuitableXvPort, which gets the adapter name. On my
system, this is XV_SWOV. Googling this name, it looks like this might
be unique to VIA, but it's definitely not unique to the CX700M2
chipset.
Has anyone got any idea how I can do this? Is there anywhere else in
the code where this sort of workaround is used? Or am I coming at it
from the wrong angle?
Thanks for your help
Olly
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Detecting video driver/chipset at runtime
