[linux-dvb] saa7146_i2c_writeout: timed out waiting for end of xfer

e9hack e9hack at googlemail.com
Tue Jul 10 00:16:27 CEST 2007

Manfred Petz wrote:

> i'm experiencing a similar problem. using with latest hg dvb
> driver (knc-1 dvb-s) everything works. though, from at least
> on, with the same kernel config and same hardware (same dvb drivers), i
> get those i2c timeouts and, when doing 'modprobe budget-av', not all
> cards get deteced. 
>   kernel: KNC1-5: Could not read MAC from KNC1 card
>   kernel: saa7146_i2c_writeout: timed out waiting for end of xfer
>   last message repeated 7 times
>   budget-av: A frontend driver was not found for device 1131/7146 subsystem 1894/0016
> since i'm using the same dvb driver, that problem seems to be triggered
> somewhere else.

It seems, that some budget cards aren't able to deliver i2c-interrupts. For testing, you can replace SAA7146_USE_I2C_IRQ
with SAA7146_I2C_SHORT_DELAY in budget-av.c. If you have a working card and a non working one, can you exchange this two
cards between its pci slots? It may be interesting whether it is a card or a slot specific problem.

- Hartmut

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