[Bug 486264] Re: tda1004x: timeout waiting for DSP ready

[Karel Marik]

Marc,

I agree it is probably kernel or firmware issue. What should i do in
such case? Should I nominate this bug for another package? Which one? I
am not skilled in symptom vs. package assignment. In any case, this
issue is associated with mythtv. Other viewers (e.g. MeTV) works fine.

=========================

Lee,

I was in email contact with Hartmut Hackmann who is (probably) author of
firmware. His description of issue is as follows:

> This issue is at least partly known:
> The problem is that the MythTV frontend initializes the (analog)
> tuner in a very early state (nothing wrong with that). If the
> driver for the tda10046 really needs to download the firmware, this
> takes a number of seconds. If any software tries to program the tuner
> in this time, this causes a bus conflict on the card. As a result, the
> DSP on the 10046 crashes and will not recover.
> A clean solution would be to implement a locking mechanism on board
> layer but i never did that (not a simple task).

He also indicated possible workaround:

> I assume that your system starts the mythtv server at boot time with an init
> script. This depends on the distribution you use but most have a directory
> /etc/init.d. You should find a shell script starting the server (sorry, i don't
> know the exact names). In this script, you might add a "sleep 10" right before
> invoking mythserver. If this does not do the trick, you migt add a "modprobe saa7134"
> right before the sleep command. This way it should be possible to get rid of the
> collision i mentioned.

But I didn't tested it as I was quite busy last few weeks and this in
not a top priority issue I am solving :)

-- 
tda1004x: timeout waiting for DSP ready
https://bugs.launchpad.net/bugs/486264
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