On Friday 25 Nov 2005 21:59, Steve Toth wrote: > Hi, > > The cx22702 demod has an i2c gate which is opened and closed on demand > to allow traffic to pass through to the pll. By default it's open. With > the Nova-T-PCI this is fine, because all access to the PLL naturally > happens via the demod driver. The cx22702 driver is the obvious place to > unlock and lock the gate... it's a function of the part. > > However, the breaks the upcoming HVR1100 driver (and will also break the > next two drivers to come after the HVR1100). > > The HVR1100 driver is a Hybrid Analog (V4L) and DVB-T animal. The same > PLL is used in both cases. Analog works normally on a clean boot, but as > soon a DVB is used, the gate is locked and subsequent V4L analog I2C > activity fails with -REMOTEIO errors. As you'd expect, DVB continue to > work happily. > > For the time being I've removed the gate locking mechanism from the > cx22702 driver. However, other than removing the gate/lock permanently, > or manually via a parameter, does anyone have any suggestions? > > Anyone know how the other demods do this? (Or if they have this feature?) Previously I've exported another function - e.g. stv0299_enableplli2c() that PLL drivers can call.. but I'm not sure if this sort of solution would be any use..
