linux-kernel - Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655 camera

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Date:   Mon, 26 Jun 2017 10:39:27 +0200
From:   Pavel Machek <pavel@....cz>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Hugues Fruchet <hugues.fruchet@...com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Alexandre Torgue <alexandre.torgue@...com>,
        LKML <linux-kernel@...r.kernel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Rob Herring <robh+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Yannick Fertre <yannick.fertre@...com>,
        Sylwester Nawrocki <sylvester.nawrocki@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Guennadi Liakhovetski <g.liakhovetski@....de>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-media@...r.kernel.org,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: omap3isp camera was Re: [PATCH v1 0/6] Add support of OV9655
 camera

On Mon 2017-06-26 08:05:04, H. Nikolaus Schaller wrote:
> Hi Pavel,
> 
> > Am 25.06.2017 um 11:18 schrieb Pavel Machek <pavel@....cz>:
> > 
> > Hi!
> > 
> >> * unfortunately we still get no image :(
> >> 
> >> The latter is likely a setup issue of our camera interface (OMAP3 ISP = Image Signal Processor) which
> >> we were not yet able to solve. Oscilloscoping signals on the interface indicated that signals and
> >> sync are correct. But we do not know since mplayer only shows a green screen.
> > 
> > What mplayer command line do you use? How did you set up the pipeline
> > with media-ctl?
> > 
> > On kernel.org, I have tree called camera-fw5-6 , where camera works
> > for me on n900. On gitlab, there's modifed fcam-dev, which can be used
> > for testing.
> 
> We did have yet another (non-DT) camera driver and media-ctl working in with 3.12.37,
> but had no success yet to update it to work with modern kernels or drivers. It
> is either that the (newer) drivers missing something or the media-ctl has changed.
> 
> Here is the log of our scripts with Hugues' driver and our latest setup:
> 
> root@...ux:~# ./camera-demo sxga
> DISPLAY=:0
> XAUTHORITY=tcp
> Camera: /dev/v4l-subdev8
> Setting mode sxga
> media-ctl -r
> media-ctl -l '"ov965x":0 -> "OMAP3 ISP CCDC":0[1]'
> media-ctl -l '"OMAP3 ISP CCDC":1 -> "OMAP3 ISP CCDC output":0[1]'
> media-ctl -V '"ov965x":0 [UYVY2X8 1280x1024]'
> media-ctl -V '"OMAP3 ISP CCDC":0 [UYVY2X8 1280x1024]'
> media-ctl -V '"OMAP3 ISP CCDC":1 [UYVY 1280x1024]'

Ok, so you are using capture, not preview.

You may want to try this one:

commit 0eae9d2a8f096f703cbc8f9a0ab155cd3cc14cef
Author: Pavel <pavel@....cz>
Date:   Mon Feb 13 21:26:51 2017 +0100

    omap3isp: fix VP2SDR bit so capture (not preview) works

    This is neccessary for capture (not preview) to work properly on
        N900. Why is unknown.
	
									Pavel

> ### starting mplayer in sxga mode ###
> mplayer tv:// -vf rotate=2 -tv driver=v4l2:device=/dev/video2:outfmt=uyvy:width=1280:height=1024:fps=15 -vo x11
> MPlayer2 2.0-728-g2c378c7-4+b1 (C) 2000-2012 MPlayer Team
> 
> Playing tv://.
> Detected file format: TV
> Selected driver: v4l2
>  name: Video 4 Linux 2 input
>  author: Martin Olschewski <olschewski@....uni-koeln.de>
>  comment: first try, more to come ;-)
> v4l2: ioctl get standard failed: Invalid argument
> Selected device: OMAP3 ISP CCDC output
>  Capabilities:  video capture  video output  streaming
>  supported norms:
>  inputs: 0 = camera;
>  Current input: 0
>  Current format: unknown (0x0)
> tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
> v4l2: ioctl enum norm failed: Inappropriate ioctl for device
> Error: Cannot set norm!
> Selected input hasn't got a tuner!
> v4l2: ioctl set mute failed: Inappropriate ioctl for device
> v4l2: ioctl query control failed: Inappropriate ioctl for device
> v4l2: ioctl query control failed: Inappropriate ioctl for device
> v4l2: ioctl query control failed: Inappropriate ioctl for device
> v4l2: ioctl query control failed: Inappropriate ioctl for device
> v4l2: ioctl streamon failed: Broken pipe
> [ass] auto-open
> Opening video filter: [rotate=2]
> VIDEO:  1280x1024  15.000 fps    0.0 kbps ( 0.0 kB/s)
> Could not find matching colorspace - retrying with -vf scale...
> Opening video filter: [scale]
> [swscaler @ 0xb5ca9980]using unscaled uyvy422 -> yuv420p special converter
> VO: [x11] 1024x1280 => 1024x1280 Planar YV12
> [swscaler @ 0xb5ca9980]No accelerated colorspace conversion found from yuv420p to bgra.
> Colorspace details not fully supported by selected vo.
> Selected video codec: RAW UYVY [raw]
> Audio: no sound
> Starting playback...
> V:   0.0  10/ 10 ??% ??% ??,?% 0 0 $<3>
> 
> 
> MPlayer interrupted by signal 2 in module: filter_video
> V:   0.0  11/ 11 ??% ??% ??,?% 0 0 $<3>
> v4l2: ioctl set mute failed: Inappropriate ioctl for device
> v4l2: 0 frames successfully processed, 0 frames dropped.
> 
> Exiting... (Quit)
> root@...ux:~#
> 
> BR and thanks,
> Nikolaus
> 



-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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