linux-kernel - Re: [PATCH v3 00/14] staging: media: zoran: fusion in one module

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Date:   Wed, 3 Nov 2021 16:57:02 +0100
From:   LABBE Corentin <clabbe@...libre.com>
To:     Hans Verkuil <hverkuil@...all.nl>
Cc:     mchehab@...nel.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, mjpeg-users@...ts.sourceforge.net
Subject: Re: [PATCH v3 00/14] staging: media: zoran: fusion in one module

Le Wed, Nov 03, 2021 at 04:21:02PM +0100, Hans Verkuil a écrit :
> Hi Corentin,
> 
> On 26/10/2021 21:34, Corentin Labbe wrote:
> > Hello
> > 
> > The main change of this serie is to fusion all zoran related modules in
> > one.
> > This fixes the load order problem when everything is built-in.
> 
> I've been testing this series, and while the module load/unload is now working,
> I'm running into a lot of other v4l2 compliance issues.
> 
> I've fixed various issues in some follow-up patches available in my tree:
> 
> https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=zoran
> 
> At least some of the worst offenders are now resolved. Note that the patch
> dropping read/write support relies on this patch:
> 
> https://patchwork.linuxtv.org/project/linux-media/patch/4f89b139-13b7-eee6-9662-996626b778b0@xs4all.nl/

Hello

My test branch already included your "zoran: fix various V4L2 compliance errors"
I have quickly checked other patch and I am ok with them.
I will add and test with them.

> 
> But there is one really major bug that makes me hesitant to merge this:
> 
> This works:
> 
> v4l2-ctl -v pixelformat=MJPG,width=768,height=576
> v4l2-ctl --stream-mmap
> 
> This fails:
> 
> v4l2-ctl -v pixelformat=MJPG,width=768,height=288
> v4l2-ctl --stream-mmap
> 
> It's an immediate lock up with nothing to indicate what is wrong.
> As soon as the height is 288 or less, this happens.
> 
> Both with my DC30 and DC30D.

Just for curiosity, what is the difference between thoses two ?

> 
> Do you see the same? Any idea what is going on? I would feel much happier
> if this is fixed.
> 
> Note that the same problem is present without this patch series, so it's
> been there for some time.
> 

I will start on digging this problem and add thoses commands to my CI.
And I know there are a huge quantity of problem since origins.
A simple example is that just setting MJPEG as default input format does not work.

But since it is not related to my serie, can you please merge it.

Thanks
Regards