Re: [PATCH v3] media: Support Intersil/Techwell TW686x-based video capture cards

Hans Verkuil
2016-03-21T11:44:49Z

Hi Ezequiel,

On 03/02/2016 03:30 PM, Ezequiel Garcia wrote:
> This commit introduces the support for the Techwell TW686x video
> capture IC. This hardware supports a few DMA modes, including
> scatter-gather and frame (contiguous).
>
> This commit makes little use of the DMA engine and instead has
> a memcpy based implementation. DMA frame and scatter-gather modes
> support may be added in the future.
>
> Currently supported chips:
> - TW6864 (4 video channels),
> - TW6865 (4 video channels, not tested, second generation chip),
> - TW6868 (8 video channels but only 4 first channels using
> built-in video decoder are supported, not tested),
> - TW6869 (8 video channels, second generation chip).
>
> Cc: Krzysztof Hałasa <khalasa@piap.pl>
> Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>

I've tested this with my PCIe tw6869 card (arrived this week).

Video is fine, but only the first audio input is available. I suspect you
have only one audio input?

Regarding the memcpy: if you have a patch for me that reverts back to a non-memcpy
situation, then I can do duration tests for you.

Unless you've ordered one of these PCIe cards yourself?

Regards,

Hans