linux-kernel - Re: [RESEND PATCH v4 03/21] staging: media: tegra-video: fix .vidioc_enum_fmt_vid

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Message-ID: <ZC0_VX5VDOkSVhn6@orome>
Date:   Wed, 5 Apr 2023 11:28:53 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>
Cc:     Luca Ceresoli <luca.ceresoli@...tlin.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Sowjanya Komatineni <skomatineni@...dia.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dmitry Osipenko <digetx@...il.com>,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Richard Leitner <richard.leitner@...data.com>,
        Mikko Perttunen <mperttunen@...dia.com>
Subject: Re: [RESEND PATCH v4 03/21] staging: media: tegra-video: fix
 .vidioc_enum_fmt_vid_cap to return all formats

On Wed, Apr 05, 2023 at 10:50:37AM +0200, Hans Verkuil wrote:
[...]
> Note that this driver will stay in staging since it still fails when I try to
> capture from two sensors at the same time: syncpoint errors start appearing
> in that case. I think there are locking issues. I think I have someone to take
> a look at that, but first I want your series to get merged.

Mikko (added) is familiar with syncpoints, so he may be able to help
with. Can you provide steps to reproduce these issues? That may make
it easier for us to help figure this out.

Unfortunately I don't have any device with an actual sensor on it, so
I can only test with the test pattern generator, but syncpoint errors
sound like they would happen with either setup.

Thierry

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