Trent Piepho wrote: > On Mon, 26 Feb 2007, Michael Krufky wrote: >> Trent Piepho wrote: >>> There is one other difference. dvb-pll will probe for the presence of an >>> I2C pll chip by doing a one byte read, the lgh06xf driver did not do >>> this. In some devices the PLL is not reachable over I2C at the time the >>> tuner is attached. Some more initialization, such as firmware loading, >>> must take place first. If any of these devices are former LG-H06xF >>> users, something must be done to disable this probe or enable I2C before >>> attaching the tuner. >> LG-H06xF tuners do not have any sort of i2c gate or firmware loading >> situation, >> and will not be affected by this issue. So, we do not have to worry about >> this >> sort of problem. > > I think the problem is not with firmware for the tuner, but firmware for > the bridge. For instance, all the other dvb-pll tuners used in cxusb.c > have NULL specified for the i2c adapter.
That is just a correlation. Those that you are thinking of are mt352 and / or zl10353-based frontends, which have the tuners behind the demod in the i2c path. This is a non-issue for the LG H06xF -- I promise you that. I tested your changes with the cxusb driver and it works just fine. The firmware loading in cxusb happens waaaaaay long before frontend_attach. A bridge driver's firmware _always_ has to be loaded before any other operation can happen. >> - select DVB_TUNER_LGH06XF if !DVB_FE_CUSTOMISE >> + select DVB_PLL if !DVB_FE_CUSTOMISE > > I thought about that, but there are a dozen other drivers that use DVB_PLL, > and all of them select it unconditionally. The DVB_PLL entry is a "hidden" > one with no name that won't show up it the config menu. Of course, there > is no reason a separate patch can't add the ability to turn DVB_PLL on or > off from the DVB_FE_CUSTOMISE menu. That's a good point... but the detail that you are missing is the fact that those other drivers have static calls to dvb_pll_configure() ... Due to that fact, those drivers _require_ dvb-pll (until they get cleaned up / refactored) The changes that you are making here only introduce usage of dvb-pll using dvb_attach() , so the presence of dvb-pll is optional. Anyway, changing this isn't that important. It can wait till later on, after we do some more refactoring and dvb-pll conversions. > >> You forgot to remove "select DVB_TUNER_LGH06XF if !DVB_FE_CUSTOMISE" from the >> "config VIDEO_CX88_DVB" section of drivers/media/video/cx88/Kconfig ... > > Of course you are right about this. I grepped for LGH06XF in the dvb tree > and assumed that I got them all. I'll fix this and add another patch to > make DVB_PLL customizable. OK. Please remember that cx88-dvb needs the static dependency on dvb-pll due to the fmd1216me code. After you push your changes, I'll make a new patch to finish off the fmd1216me conversion to dvb-pll, then that dvb-pll static dependency from cx88-dvb can be made optional. Cheers, Michael Krufky _______________________________________________ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
