Chris Brown wrote: > > > On 22/03/07, *Dave Jones* <davej@xxxxxxxxxx <mailto:davej@xxxxxxxxxx>> > wrote: > > On Thu, Mar 22, 2007 at 11:15:32AM -0400, Chuck Ebbert wrote: > > > What are we supposed to do when this kind of thing happens? It > appears that > > multiple drivers claim to support the same hardware. > > Grr, this happens far too often. We have the same with for eg, > orinoco and hostap right now. The usual deal is that we either > just build the 'best' driver for that hardware, or if there's a case > where both drivers support the same hardware _and_ some hardware unique > to them, we nobble the pci table so that the crappier driver > doesn't load on that hardware. > > As to which is the best one in this case.. I really don't know. > > Or maybe this is a situation where it's valid to have both drivers > loaded? > We don't actually support that right now, but patches went to > linux-pci list > last week that should be showing up in GregKHs tree adding an > alternative > method for drivers to bind to a device in situations where it's > possible > for two drivers to drive different parts of the same chip. > (This case has been showing up more and more recently too.. > agp vs edac, matroxfb vs lm_sensors,..) > > > Taking a look at: > > http://lwn.net/Articles/212535/ > > which may be able to shed some light on the changes. Yep. > Even with the > blackbird driver blacklisted, the v4l2 loads but the dvb driver does > not. It should be noted that the two co-exist peacefully when loaded but > something is preventing the latter from loading - perhaps because the > kernel "sees" the driver requirements as being satisfied by the v4l2 module? > > In any case, in this instance it is just that the cx88-dvb driver is > failing to load as opposed to anything more sinister. Interestingly enough, I was talking to one of the vl4-dvb maintainers (Michael Krufky) on irc about this very driver two days ago. The cx88-dvb driver is *supposed* to auto-load via a request_module() call in cx8802. Similar for cx88-blackbird. Things broke when support for the Hauppauge HVR1300 was added, because it actually needs *both* cx88-dvb and cx88-blackbird. Upstream v4l-dvb has this fixed, verified by me from 20070302 snapshot cx88-dvb/cx8802 drivers. -- Jarod Wilson jwilson@xxxxxxxxxx
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