[linux-dvb] Re: av7110_send_fw_cmd error ect.

[Johannes Stezenbach <js@convergence.de>]

Andreas Share wrote:
> 
> just insert some debug printk´s in av7110_before_after_tune() before the two
> firmware calls, and one printk in SetPIDs() and you see you got several
> calls from this 2 funktions, especialy without signal.
> You could also insert in __av7110_send_fw_cmd() (av7110_hw.c) an
> "rdebi(av7110, DEBINOSWAP, COMMAND, 0, 2" just before the printk(KERN_ERR
> "%s: timeout waiting for COMMAND idle\n", __FUNCTION__); and an additional
> printk to print out the rdebi return.
> 
> You get the last command & funktion transfered to the command buffer. I
> could bet you returned 0x0100 ;) And because the command stay in the
> command-buffer, no other firmware command will be transfered or executed.
> After some time the arm crashed also...

Things are not so easy, because some kinds of messages are first
pushed into a message queue and executed later. So the last
command from the PC might not be the one which caused the ARM crash.

Specifically COMTYPE_PIDFILTER commands (MultiPID etc.) are queued.
The 0x0100 then means that the ARM crashed before it could push the
command into the message queue (or while doing it).

Johannes


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