Hi Andrey,
On 01/03/2016 02:41 AM, Andrey Utkin wrote:
> (Disclaimer up to scissors mark)
>
> Please be so kind to take a look at a new driver.
> We aim to follow high standards of kernel development and possibly to get
> this driver in mainline kernel.
> The device is multichannel video and audio capture and compression chip
> TW5864 of Intersil/Techwell.
>
> The code is in repo https://github.com/bluecherrydvr/linux , branch "tw5864",
> subdir drivers/staging/media/tw5864 .
> This branch is regularly rebased during development, so that there's a single
> commit adding this driver on top of current linux-next.
> Direct link to subdir:
> https://github.com/bluecherrydvr/linux/tree/tw5864/drivers/staging/media/tw5864
>
>
> Implementation status
>
> * H.264 streaming work stable, including concurrent work of multiple channels
> on same chip;
> * Audio streaming functionality is not implemented, but is considered for
> future;
> * The chip has motion detection capability, but of same sensitivity level for
> whole frame; this was considered quite limiting for our needs and we have
> implemented per-grid-cell sensitivity with a bit of heuristic processing of
> motion vector data exposed by hardware. Datasheet-suggested mechanism is not
> used currently.
>
> Testing status
>
> * Runtime tests on my test machine show that video streaming works stable.
> Multichannel streaming was working, but I haven't test this with latest
> revision lately yet.
> * Runtime performance will be tested later also on few early-adopters' CCTV
> machines.
> * checkpatch.pl -f on files reports no warnings, errors or style issues;
> * checkpatch.pl on patch reports no warnings, errors or style issues;
> * sparse reports nothing;
> * compilation shows no warnings (gcc 4.9.3);
> * compilation with EXTRA_CFLAGS=-W shows a lot of warnings from included
> headers (over 9000 lines of output). Seems this technique from
> Documentation/SubmitChecklist is not practical in this case
> * Other Documentation/SubmitChecklist advises weren't thoroughly worked out.
Did you also test with v4l2-compliance? Before I accept the driver I want to
see the
output of 'v4l2-compliance' and 'v4l2-compliance -s'. Basically there shouldn't
be
any failures.
I did a quick scan over the source and I saw nothing big. When you post the new
version I will go over it more carefully and do a proper review.
Regards,
Hans
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