After reading documentation (and confirming that I already know all the
acronyms) and sifting thru driver code I decided to ask on the list, while
the people who wrote this stuff can still answer ;)
Basically I want to DMA a chunk of video ram into plain RAM. This is
useful for: video capture, VBI/closed captioning, taking screen snapshots.
I got drm handle, size of the buffer, AGP offset and pointer to the buffer
in XFree86. What can I do with this ? At the moment I am mostly concerned
with Radeon AIW AGP, but this will spread to other (non AGP) cards.
The docs seem to indicate that both XFree and client can use this - it
would be really fabulous if clients could just mmap the buffer.
thanks
Vladimir Dergachev
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