[linux-dvb] Re: latest 2.6 bk tree issue.

[Michael Hunold <hunold@convergence.de>]

Hello Gerd,

> gmake[4]: *** No rule to make target `/etc/dvb/dec2000t.bin', needed by `drivers/media/dvb/ttusb-dec/dsp_dec2000.h'.
> gmake[4]: Target `__build' not remade because of errors.
> gmake[3]: *** [drivers/media/dvb/ttusb-dec] Error 2
>
> :-/
>
> I see the intention behind that.  Guess dec2000t.bin isn't redistributable, correct?
Yes.

> Neverless it is a very bad idea to make that a compile time dependency, 
If the file is present, a firmware "header file" from the binary is 
created and compiled into the driver.

> because that
> isn't going to work with distribution kernels.

In contrast, the ttusb_budget driver loads the firmware after module 
startup from user definable location, which I don't like either. Or is 
this better?

> I suggest to have a look at Documentation/firmware_class/
Yes, I have already look at that. The problem is, that at least the 
av7110 driver needs in-kernel persistence. Sometimes the ARM processor 
crashes and the firmware must be present to be able to reboot it.

I don't know if that's true for the USB DVB-T drivers, too.

But I guess firmware buffering can be implemented in av7110.c, though 
without pains.

Have you worked with firmware_class? Are there any real devices using it?

>   Gerd
Any volunteers to look after this issue, ie. implementing firmware 
handling for 2.5/2.6 with firmware_class, while preserving the old 
behaviour for 2.4 kernels?

CU
Michael.



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