Re: [libdc] 1394A | 1394B host adapter detection
Capture and control API for IIDC compliant cameras
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From: Stefan R. <st...@s5...> - 2009-06-23 22:06:03
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I wrote: > Getting the link speed of the camera (also using libraw1394) works > almost the same: PS: I have seen a 1394b/S800 SBP-2 harddisk which featured a too low link speed value. This was probably because the firmware authors copy'n'pasted it from another product of theirs which was 1394a/S400. Hopefully such bugs are rare. I presume that IIDC device developers/ manufacturers take more care. Since the kernel drivers have to deal with all sorts of quirky firmwares, they actually ignore link_spd from the bus info block and pick up the best end-to-end speed that actually works, independently of firmware claims. This is also the speed that's exported in the 2.6.30 kernel API. -- Stefan Richter -=====-==--= -==- ==--- http://arcgraph.de/sr/ |