Add V4L2_FIELD_ALTERNATE support to SAA7134

[Hartmut Hackmann <hartmut.hackmann (at) t-online.de>]

Hi, Chris

Chris Byrne wrote:
> - Adds V4L2_FIELD_ALTERNATE support to the saa7134 driver
> - Fixed field swap in non-interlaced modes (bottom = top)
>
> Signed-off-by: Chris Byrne <chris.byrne (at) monstavision.com>
<snip>

I must say:
I don't understand your second patch because at non-interlace,
top and bottom field are identical by definition.
But you should set the option noninterlaced=1 to saa7134.ko
We should make this the default, it can be left active at
interlace.
I can imagine 2 reasons for your corrupted image problem:
- either a buffer collision
- or a DMA buffer overflow in the SAA7134 due to excessive
  load on the PCI bus. Note that there is a recovery algorithm
  that prevents total image corruption.

Can you please comment?

Best regards
  Hartmut

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