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by lak4cyut
Fri Nov 08, 2019 6:34 am
Forum: Camera board
Topic: Very low FPS when V4L2 Streaming (Unicam + custom v4l2-subdev driver)
Replies: 2
Views: 128

Re: Very low FPS when V4L2 Streaming (Unicam + custom v4l2-subdev driver)

Hi 6by9, Thanks for your help again. After test with v4l2-ctl, I guess my subdev driver and DT-overlay are correct because its framerate is stable on 30 fps. ( :D :D ) [email protected]:~ $ v4l2-ctl --stream-mmap=3 --stream-count=1000 --stream-to=/dev/null <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.00 fps <<<<...
by lak4cyut
Thu Nov 07, 2019 8:46 am
Forum: Camera board
Topic: Very low FPS when V4L2 Streaming (Unicam + custom v4l2-subdev driver)
Replies: 2
Views: 128

Very low FPS when V4L2 Streaming (Unicam + custom v4l2-subdev driver)

HI Everyone, I try to write a custom v4l2-subdev driver to control my own camera module (with bcm2835-unicam v4l2 driver) and finally, I finished it. I can get the correct image and set/get parameters via v4l2 framework. But I encounter a strange behavior when I try to play the video. (I play the vi...
by lak4cyut
Mon Aug 26, 2019 8:40 am
Forum: Camera board
Topic: V4L2 output frame abnormal (bcm2835_unicam + ov5647)
Replies: 2
Views: 312

Re: V4L2 output frame abnormal (bcm2835_unicam + ov5647)

Hi 6by9, First of all, I want to thank you of those information. It is helpful for me, I am a newbie on this scope (multimedia). After remove "clock-noncontinuous;" on ov5647.dts and re-build it, the captured image has the chance become normal. Then I reference the spec and your code, update the ini...
by lak4cyut
Wed Aug 21, 2019 9:30 am
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 531
Views: 166212

Re: Raw sensor access / CSI-2 receiver peripheral

The main ones: - Licence. Any kernel driver almost has to be GPLv2 and therefore open source. Check with your sensor supplier that they are happy for the register set to be released. Copying raspiraw means that the register set can be hidden in your userspace app which can be under any licence you ...
by lak4cyut
Wed Aug 21, 2019 8:52 am
Forum: Camera board
Topic: V4L2 output frame abnormal (bcm2835_unicam + ov5647)
Replies: 2
Views: 312

V4L2 output frame abnormal (bcm2835_unicam + ov5647)

Hi everyone, I built a custom kernel to enable bcm2835-unicam and ov5647 kernel module and add ov5647 dt overlay, try to capture camera image via V4L2 official interface. (Of course I bought a Raspberry Pi official camera module - OV5647 version.) Kernel base version: 4.19.64 Raspberry Pi: 3 model B...

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