Tejun Heo wrote:
[email protected] wrote:
Mybe I am wrong, but if you are detecting 40-wire cable to set them to
DMA/33, why the check includes also 80-wire cables configuring them to
DMA/33 too?
With this patch my nvidia4 IDE controllers detects correctly and
configure correctly DMA/100 for my HD and DMA/33 for my DVD (the first
uses a 80-wire cable, the second a 40-wire cable).
Am I wrong somewhere?
That's the drive side verification of 80c cable check, so if the
condition triggers we downgrade 80c or unknown to 40c. Cable detection
on nvidia PATA is a disaster. You're supposed to do some ACPI dancing
and drive side detection is completely bogus. Eeeek....
Alan, did you have a chance to test the ACPI cable detection? It just
didn't work when I tried it. It always returned 80c on my machine.
Hopefully when we get that support in and working it will solve a lot of
these issues (and others, like the laptops that have a short 40-wire
cable that is good for high UDMA speeds which we presently have to
hard-code detection for specific models).
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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