Re: [PATCH REPOST] TDA1997x: replace video detection routine

[Krzysztof Hałasa]

Hi Hans,

Hans Verkuil <hverkuil@xxxxxxxxx> writes:

> The tda1997x doesn't have any method of obtaining the sync polarities?
>
> HSync and VSync are, as you say, using in-band signaling, but the 'polarity'
> still matters when it comes to detecting timings. All HDMI receivers I have
> ever seen have a register that reports the polarities. I find it *very* hard
> to imagine that this device doesn't support that.

I didn't know that HDMI serializers send the logical levels of those
lines, I thought some frame/field/line start/end codes are sent instead.
I will have to have a closer look at this chip, then.

> Do you have a datasheet for this device?

No, there is only the current driver and also the old one (in Gateworks'
Freescale/NXP kernel). Tim may have something perhaps under NDA, maaybe.

I will see if I can find these bits in the registers.

Thanks.
-- 
Krzysztof "Chris" Hałasa

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