Re: [PATCH 0/3] vimc: Allow multiple capture devices to use the same sensor

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Hi Hans,

On 2019-10-23 09:01:40 +0200, Hans Verkuil wrote:
> Hi Niklas,
> 
> For one reason or another this series was never reviewed/picked up and
> it now no longer applies.
> 
> Combined with the big switch to a monolithic driver I am sure that this
> series needs to be redone. So I am marking it as "Changes Requested" and
> it is up to you to decide whether to rebase/rework this series.

I talked to Helen about this series and she thought it could be a nice 
candidate for a student workshop/class so I'm not planing to respin this 
myself.

> 
> Regards,
> 
> 	Hans
> 
> On 5/18/19 3:07 AM, Niklas Söderlund wrote:
> > Hi,
> > 
> > This series adds support for two (or more) capture devices to be 
> > connected to the same senors and run simultaneously. Each capture device 
> > can be started and stopped independent of each other.
> > 
> > Patch 1/3 and 2/3 deals with solving the issues that arises once two 
> > capture devices can be part of the same pipeline. While 3/3 allows for 
> > two capture devices to be part of the same pipeline and thus allows for 
> > simultaneously use.
> > 
> > The series is based on the latest media-tree and it functionality can be 
> > demonstrated with the following test.
> > 
> >>>> begin test <<<
> > mdev=/dev/media0
> > 
> > media-ctl -d $mdev -l "'Debayer A':1 -> 'Scaler':0 [1]"
> > media-ctl -d $mdev -l "'Debayer B':1 -> 'Scaler':0 [0]"
> > 
> > media-ctl -d $mdev -V "'Debayer A':0 [fmt:RGB888_1X24/640x480 field:none]"
> > media-ctl -d /dev/media0 -V "'Sensor A':0 [fmt:SRGGB8_1X8/640x480 field:none]"
> > 
> > yavta -f RGB24 -s 1920x1440 --field none /dev/video2
> > yavta -f SRGGB8 -s 640x480 --field none /dev/video0
> > 
> > yavta -f RGB24 -s 1920x1440 --field none /dev/video2 --capture=100 &
> > yavta -f SRGGB8 -s 640x480 --field none /dev/video0 --capture=100
> > wait
> >>>> end test <<<
> > 
> > In addition to testing with this test the series is tested with multiple 
> > qv4l2 instances controlling different capture devices connected to the 
> > same sensor.
> > 
> > Niklas Söderlund (3):
> >   vimc: Add usage count to subdevices
> >   vimc: Serialize vimc_streamer_s_stream()
> >   vimc: Join pipeline if one already exists
> > 
> >  drivers/media/platform/vimc/vimc-capture.c  | 35 ++++++++++++++++++++-
> >  drivers/media/platform/vimc/vimc-debayer.c  |  8 +++++
> >  drivers/media/platform/vimc/vimc-scaler.c   |  8 +++++
> >  drivers/media/platform/vimc/vimc-sensor.c   |  7 +++++
> >  drivers/media/platform/vimc/vimc-streamer.c | 23 +++++++++-----
> >  5 files changed, 73 insertions(+), 8 deletions(-)
> > 
> 

-- 
Regards,
Niklas Söderlund



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