On 2012-03-26 09:37, Joshua Hintze wrote:
Gary,
I'm using linux branch from 2.6.39
Fetch URL: git://www.sakoman.com/git/linux-omap-2.6
branch: omap-2.6.39
I'm using an overo board so I figured I should follow Steve Sakoman's
repository.
Which brings up another question, would you recommend going off of one
of Laurent's repo's and if so which one?
The last time I tried Laurent's repo, it did not have the UYVY support in
the OMAP3ISP/CCDC merged in. I don't know if that has changed recently.
On Mon, Mar 26, 2012 at 9:25 AM, Gary Thomas<gary@xxxxxxxxxxxx> wrote:
On 2012-03-25 23:13, Joshua Hintze wrote:
Alright I made some progress on this.
I can access the Mt9p031 registers that are exposed using a command such
as
./yavta -l /dev/v4l-subdev8 to list the available controls. Then I can
set the exposure and analog gain with
./yavta --set-control '0x00980911 1500' /dev/v4l-subdev8<--- This
seems to give the desired effect.
Note that ./yavta -w (short option for --set-control) gives a seg
fault for me. Possible bug in yavta??
Now I'm working on fixing the white balance. In my office the
incandescent light bulbs give off a yellowish tint late at night. I've
been digging through the omap3isp code to figure out how to enable the
automatic white balance. I was able to find the private IOCTLs for the
previewer and I was able to use VIDIOC_OMAP3ISP_PRV_CFG. Using this
IOCTL I adjusted the OMAP3ISP_PREV_WB, OMAP3ISP_PREV_BLKADJ, and
OMAP3ISP_PREV_RGB2RGB.
Since I wasn't sure where to start on adjusting these values I just
set them all to the TRM's default register values. However when I did
so a strange thing occurred. What I saw was all the colors went to a
decent color. I'm curious if anybody can shed some light on the best
way to get a high quality image. Ideally if I could just set a bit for
auto white balance and auto exposure that could be good too.
Just curious - what codebase (git URL) are you using?
On Fri, Mar 23, 2012 at 1:01 PM, Joshua Hintze<joshua.hintze@xxxxxxxxx>
wrote:
Sorry to bring up this old message list. I was curious when you spoke
about the ISP preview engine being able to adjust the white balance.
When I enumerate the previewer's available controls all I see is...
root@overo:~# ./yavta -l /dev/v4l-subdev3
--- User Controls (class 0x00980001) ---
control 0x00980900 `Brightness' min 0 max 255 step 1 default 0 current 0.
control 0x00980901 `Contrast' min 0 max 255 step 1 default 16 current 16.
2 controls found.
Is this what you are referring to? Are there other settings I can
adjust to get the white balance and focus better using the OMAP3 ISP
AWEB/OMAP3 ISP AF?
Thanks,
Josh
Hi Gary,
On Wednesday 30 November 2011 18:00:55 Gary Thomas wrote:
On 2011-11-30 07:57, Gary Thomas wrote:
On 2011-11-30 07:30, Laurent Pinchart wrote:
On Wednesday 30 November 2011 15:13:18 Gary Thomas wrote:
[snip]
This sort of works(*), but I'm still having issues (at least I can
move
frames!) When I configure the pipeline like this:
media-ctl -r
media-ctl -l '"mt9p031 3-005d":0->"OMAP3 ISP CCDC":0[1]'
media-ctl -l '"OMAP3 ISP CCDC":2->"OMAP3 ISP preview":0[1]'
media-ctl -l '"OMAP3 ISP preview":1->"OMAP3 ISP resizer":0[1]'
media-ctl -l '"OMAP3 ISP resizer":1->"OMAP3 ISP resizer output":0[1]'
media-ctl -f '"mt9p031 3-005d":0[SGRBG12 2592x1944]'
media-ctl -f '"OMAP3 ISP CCDC":0 [SGRBG12 2592x1944]'
media-ctl -f '"OMAP3 ISP CCDC":1 [SGRBG10 2592x1944]'
media-ctl -f '"OMAP3 ISP preview":0 [SGRBG10 2592x1943]'
media-ctl -f '"OMAP3 ISP resizer":0 [YUYV 2574x1935]'
media-ctl -f '"OMAP3 ISP resizer":1 [YUYV 660x496]'
the resulting frames are 666624 bytes each instead of 654720
When I tried to grab from the previewer, the frames were 9969120
instead of 9961380
Any ideas what resolution is actually being moved through?
Because the OMAP3 ISP has alignment requirements. Both the preview
engine and the resizer output line lenghts must be multiple of 32
bytes. The driver adds padding at end of lines when the output width
isn't a multiple of 16 pixels.
Any guess which resolution(s) I should change and to what?
I changed the resizer output to be 672x496 and was able to capture video
using ffmpeg.
I don't know what to expect with this sensor (I've never seen it in use
before), but the image seems to have color balance issues - it's awash
in
a green hue. It may be the poor lighting in my office... I did try the
9
test patterns which I was able to select via
# v4l2-ctl -d /dev/v4l-subdev8 --set-ctrl=test_pattern=N
and these looked OK. You can see them at
http://www.mlbassoc.com/misc/mt9p031_images/
Neither the sensor nor the OMAP3 ISP implement automatic white balance.
The
ISP preview engine can be used to modify the white balance, and the
statistics
engine can be used to extract data useful to compute the white balance
parameters, but linking the two needs to be performed in userspace.
So this means that your original problem comes from the BT656 patches.
Yes, it does look that way. Now that I have something that moves data,
I
can compare how the ISP is setup between the two versions and come up
with a fix.
This is next on my plate, but it may take a while to figure it out.
Is there some recent tree which will have this digital (mt9p031) part
working that also has the BT656 support in it? I'd like to try that
rather than spending time figuring out why an older tree isn't working.
No, I haven't had time to create one, sorry. It shouldn't be difficult to
rebase the BT656 patches on top of the latest OMAP3 ISP and MT9P031 code.
--
Regards,
Laurent Pinchart
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
