[linux-dvb] [EXPERIMENTAL] cx88+xc3028 - tests are required - was: Re: Wh en xc3028/xc2028 will be supported?
Mauro Carvalho Chehab
mchehab at infradead.org
Tue Feb 19 22:20:43 CET 2008
> > It is not that simple. Steven patch works for DTV on PCI Nano; Christopher
> > patches for some other DiVCO boards (DTV also); my port of Markus patch
> > other boards (tested by Dâniel Fraga - Analog TV).
> What does one board have to do with another? Just because these boards
> all use xceive tuners does not mean that they should be grouped together.
No, but we have patches for all of them.
> Because the user has the ability to load cx8800 without cx88-dvb, and
> likewise, the user has the ability to load cx88-dvb without cx8800, the
> attach call must be fully qualified such that the other side of the
> driver is not required to be loaded in order for the tuner to work.
If you take a look at the code, you'll see that all code is at cx88xx. This
module is loaded by cx8800, if you're using analog, or by cx8802, if you're
using cx88-dvb or cx88-blackbird.
The code initializes xc3028 before tuner attach.
> In the case of FusionHDTV5 pci nano, there will never be an attach call
> from the analog side of the driver, since the tuner is hidden behind the
> s5h1409's i2c gate, and analog mode is not supported with the current
> driver. If you set i2c_scan=1 on the PCI nano, the xceive tuner will
> not even show up in the scan.
The proper fix is to open the i2c gate before loading tuner. This will allow
i2c_scan to work and both analog and digital modes will work. Btw, this
somewhat similar to what dvico_fusionhdtv_hybrid_init() does on cx88-cards.
I've added a patch that should open the bridge for s5h1409. Please test.
> > We need one solution that works for all boards, not just yours.
> > That's said, maybe SET_TUNER_CONFIG is being called too early. Maybe the
> way to
> > fix this is to create an special function to initialize it, that would be
> > called later by cx8800 or cx8802.
> both cx8800 *and* cx8802 need this functionality. Please keep in mind
> that some users do not ever use analog mode of these cards, and some
> have even blacklisted cx8800 from loading. This is fine, because cx8800
> is not needed for cx88-dvb to function properly. This is a level of
> flexibility that we do not want to remove.
> The _real_ problem is that the tuner is being attached to the bridge
> driver in two locations -- analog side and digital side. This problem
> will be entirely avoided once we are attaching the tuner driver in a
> single location, globally to the entire driver. Such changes are
> planned to be dealt with in tuner refactor phase 4, but I am still
> dealing with refactoring the prerequisites for this scenario, in phase 3
> -- all will come in due time, but for now, we must provide a fully
> qualified attachment call each time we attach a tuner driver.
It would be really nice to avoid having to attach it later, on cx88-dvb,
although the double attach won't hurt. I'm not sure on how you want to avoid
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