[linux-dvb] [PATCH] Fix for Air2PC HD5000

Trent Piepho xyzzy at speakeasy.org
Thu Aug 9 04:56:07 CEST 2007

On Wed, 8 Aug 2007, Michael Krufky wrote:
> >
> >The HD-5000 is the only flexcop card that uses dvb-pll with a pll directly
> >attached to the I2C bus.
> >
> >The flexcop driver doesn't check the return value of dvb_pll_attach, so
> >there is no error message.  It will just not work correctly.
> >
> Perhaps I worded my question incorrectly...  When I said, "others are
> not", I meant other users of the HD5000.  If you look back to earlier in
> this thread, I gave an explanation of the testing that I have done last
> weekend.  Using 2.6.22, the initial tuning params work properly and all
> attempts afterwards do not.
> Regardless, things are now beginning to make sense, although I do not
> understand why the latest HG works fine with that card for me against
> eariler kernel revisions.  Perhaps I made a mistake in one of my tests.
> Now I know exactly what needs testing.  How to fix this cleanly, that I
> am still not sure of, without affecting other drivers.  Maybe we'll have
> to hack the flexcop i2c handling to fake a good i2c reply.  I'll look
> into it when I get back home.

What should happen is that there aren't any errors, even when loading the
driver or when tuner.  But the frequency won't change.  If the frequency
was set using older drivers, there is probably nothing to reset it when
changing drivers or rebooting.  So if you tune to a channel before testing
after the change, and then try the same channels, it will appear to be
working fine.  If you try to tune to a new channel, it will _appear_ to
work, except you'll keep getting the old channel.

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