Re: tvp5150 regression after commit 9f924169c035

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Hello Wofram,

On 04/14/2016 10:19 AM, Wolfram Sang wrote:
> 
>> Yes, I also wonder why I'm the only one facing this issue... maybe no one
>> else is using the tvp5150 driver on an OMAP board with mainline?
> 
> I wonder why it only affects tvp5150. I don't see the connection yet.
> 

Yes, me neither. All other I2C devices are working properly on this board.

The only thing I can think, is that the tvp5150 needs a reset sequence in
order to be operative. It basically toggles two pins in the chip, this is
done in tvp5150_init() [0] and is needed before accessing I2C registers.

Maybe runtime pm has an effect on this and the chip is not reset correctly?

[0]: https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/drivers/media/i2c/tvp5150.c#n1311

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
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