linux-kernel - Re: [PATCH 0/3] media: staging: rkisp1: allow simultaneous streaming from multiple capture devices

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Date:   Fri, 13 Mar 2020 13:51:53 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     linux-media@...r.kernel.org
Cc:     mchehab@...nel.org, linux-kernel@...r.kernel.org,
        tfiga@...omium.org, linux-rockchip@...ts.infradead.org,
        hans.verkuil@...co.com, kernel@...labora.com
Subject: Re: [PATCH 0/3] media: staging: rkisp1: allow simultaneous streaming
 from multiple capture devices



On 3/12/20 10:46 PM, Helen Koike wrote:
> Hi,
> 
> This series adds support for simultaneous streaming from both capture
> devices (rkisp1_selfpath and rkisp1_mainpath).
> 
> Patch 1/3 fixes return error handling from pm functions, which was
> preventing the second stream to start.
> 
> Patch 2/3 don't allow .s_stream entity callback to be called if a stream is
> already enabled. Which fixes the issue when stopping one stream would
> also stop the other.
> 
> Patch 3/3 serializes start/stop streaming calls, since they both read
> and modify the streaming status of all the entities in the piipeline.
> 
> This series was tested with:
> 
> SEN_DEV=/dev/v4l-subdev3
> ISP_DEV=/dev/v4l-subdev0
> RSZ_SP_DEV=/dev/v4l-subdev2
> RSZ_MP_DEV=/dev/v4l-subdev1
> CAP_SP_DEV=/dev/video1
> CAP_MP_DEV=/dev/video0
> 
> WIDTH=1920
> HEIGHT=1080
> RAW_CODE=SRGGB10_1X10
> YUV_CODE=YUYV8_2X8
> 
> v4l2-ctl --set-subdev-fmt pad=0,width=$WIDTH,height=$HEIGHT,code=$RAW_CODE -d $SEN_DEV
> 
> v4l2-ctl --set-subdev-fmt pad=0,width=$WIDTH,height=$HEIGHT,code=$RAW_CODE -d $ISP_DEV
> v4l2-ctl --set-subdev-selection pad=0,target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT -d $ISP_DEV
> 
> v4l2-ctl --set-subdev-selection pad=2,target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT -d $ISP_DEV
> v4l2-ctl --set-subdev-fmt pad=2,width=$WIDTH,height=$HEIGHT,code=$YUV_CODE -d $ISP_DEV
> 
> v4l2-ctl --set-subdev-fmt pad=0,width=$WIDTH,height=$HEIGHT,code=$YUV_CODE -d $RSZ_SP_DEV
> v4l2-ctl --set-subdev-fmt pad=1,width=$WIDTH,height=$HEIGHT,code=$YUV_CODE -d $RSZ_SP_DEV
> 
> v4l2-ctl --set-subdev-selection pad=0,target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT -d $RSZ_SP_DEV
> 
> v4l2-ctl --set-subdev-fmt pad=0,width=$WIDTH,height=$HEIGHT,code=$YUV_CODE -d $RSZ_MP_DEV
> v4l2-ctl --set-subdev-fmt pad=1,width=$WIDTH,height=$HEIGHT,code=$YUV_CODE -d $RSZ_MP_DEV
> 
> v4l2-ctl --set-subdev-selection pad=0,target=crop,top=0,left=0,width=$WIDTH,height=$HEIGHT -d $RSZ_MP_DEV
> 
> v4l2-ctl -v width=$WIDTH,height=$HEIGHT,pixelformat=NV12 -d $CAP_SP_DEV
> v4l2-ctl -v width=$WIDTH,height=$HEIGHT,pixelformat=NV12 -d $CAP_MP_DEV
> 
> sleep 1
> 
> v4l2-ctl --stream-mmap --stream-count=100 -d $CAP_SP_DEV --stream-to=/tmp/test_sp.raw &
> v4l2-ctl --stream-mmap --stream-count=100 -d $CAP_MP_DEV --stream-to=/tmp/test_mp.raw &
> 
> wait
> echo "Completed"
> 
> 
> 
> Helen Koike (3):
>   media: staging: rkisp1: cap: fix return values from pm functions
>   media: staging: rkisp1: do not call s_stream if the entity is still in
>     use
>   media: staging: rkisp1: cap: serialize start/stop stream
> 
>  drivers/staging/media/rkisp1/rkisp1-capture.c | 25 ++++++++++++++++---
>  drivers/staging/media/rkisp1/rkisp1-common.h  |  2 ++
>  drivers/staging/media/rkisp1/rkisp1-dev.c     |  2 ++
>  3 files changed, 25 insertions(+), 4 deletions(-)
> 

Please, ignore this version, I rebased with the wrong branch. I'll send v2.

Thanks
Helen