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

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Date:   Thu, 12 Mar 2020 22:46:23 -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,
        Helen Koike <helen.koike@...labora.com>
Subject: [PATCH 0/3] media: staging: rkisp1: allow simultaneous streaming from multiple capture devices

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(-)

-- 
2.25.0