Nikolaus,
some comments about pixel format/resolution below:

On 06/26/2017 10:39 AM, Pavel Machek wrote:

On Mon 2017-06-26 08:05:04, H. Nikolaus Schaller wrote:

quoted

Hi Pavel,

quoted

Am 25.06.2017 um 11:18 schrieb Pavel Machek [off-list ref]:

Hi!

quoted

* 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 at letux:~# ./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 [off-list ref]
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

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### 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

=> "outfmt=uyvy:width=1280:height=1024"

Nikolaus,
Be careful that only VGA/RGB565 is coded in this basic version of OV9655,
perhaps this explain partly your troubles ?

quoted

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 [off-list ref]
  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 at letux:~#

BR and thanks,
Nikolaus