Le 09/01/2014 19:14, Enrico a écrit :
On Wed, Jan 8, 2014 at 12:55 PM, Julien BERAUD <julien.beraud@xxxxxxxxxx> wrote:
Le 07/01/2014 11:12, Enrico a écrit :
On Mon, Jan 6, 2014 at 11:11 AM, Julien BERAUD <julien.beraud@xxxxxxxxxx>
wrote:
Le 03/01/2014 12:30, Enrico a écrit :
On Wed, Dec 18, 2013 at 11:09 AM, Enrico <ebutera@xxxxxxxxxxxxxxxx>
wrote:
On Tue, Dec 17, 2013 at 2:11 PM, Florian Vaussard
<florian.vaussard@xxxxxxx> wrote:
So I converted the iommu to DT (patches just sent), used pdata quirks
for the isp / mtv9032 data, added a few patches from other people
(mainly clk to fix a crash when deferring the omap3isp probe), and a
few
small hacks. I get a 3.13-rc3 (+ board-removal part from Tony
Lindgren)
to boot on DT with a working MT9V032 camera. The missing part is the
DT
binding for the omap3isp, but I guess that we will have to wait a bit
more for this.
If you want to test, I have a development tree here [1]. Any feedback
is
welcome.
Cheers,
Florian
[1] https://github.com/vaussard/linux/commits/overo-for-3.14/iommu/dt
Thanks Florian,
i will report what i get with my setup.
And here i am.
I can confirm it works, video source is tvp5150 (with platform data in
pdata-quirks.c) in bt656 mode.
Laurent, i used the two bt656 patches from your omap3isp/bt656 tree so
if you want to push it you can add a Tested-by me.
There is only one problem, but it's unrelated to your DT work.
It's an old problem (see for example [1] and [2]), seen by other
people too and it seems it's still there.
Basically if i capture with yavta while the system is idle then it
just waits without getting any frame.
If i add some cpu load (usually i do a "cat /dev/zero" in a ssh
terminal) it starts capturing correctly.
The strange thing is that i do get isp interrupts in the idle case, so
i don't know why they don't "propagate" to yavta.
Any hints on how to debug this?
Enrico
[1]: https://linuxtv.org/patch/7836/
[2]:
https://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg44923.html
I have had what looked a lot like these problems before and it was due to
a
wrong configuration of the ccdc cropping regarding to the blanking. Could
you send me the configuration of the pipeline that you apply with
media-ctl,
just in case this is the same problem.
i'm using:
media-ctl -r -l '"tvp5150 2-005c":0->"OMAP3 ISP CCDC":0[1], "OMAP3 ISP
CCDC":1->"OMAP3 ISP CCDC output":0[1]'
media-ctl --set-format '"tvp5150 2-005c":0 [UYVY 720x625]'
And then capture with yavta -s 720x625 (or 720x576, can't remember right
now).
Thanks,
Enrico
I don't think this is sufficient, though I am no expert about omap3 isp, you
should configure the format of the ccdc input and of the ccdc output too.
When I had this problem, it was solved by adding cropping at the input of
the CCDC, corresponding to the blanking period, which was :
- media-ctl -v -f '"OMAP3 ISP CCDC":0 [UYVY2X8 720x576 (0,49/720x576)]'
or
- media-ctl -v -f '"OMAP3 ISP CCDC":0 [UYVY2X8 720x480 (0,45/720x480)]'
respectively.
I don't know if this can be of any help.
Regards,
Julien BERAUD
It seems i can't set cropping at the CCDC input (sink), but i can on
output (source):
- entity 5: OMAP3 ISP CCDC (3 pads, 9 links)
type V4L2 subdev subtype Unknown flags 0
device node name /dev/v4l-subdev2
pad0: Sink
[fmt:UYVY2X8/720x625]
<- "OMAP3 ISP CCP2":1 []
<- "OMAP3 ISP CSI2a":1 []
<- "tvp5150 1-005c":0 [ENABLED]
pad1: Source
[fmt:UYVY2X8/720x576
crop.bounds:(0,0)/720x624
crop:(0,48)/720x576]
-> "OMAP3 ISP CCDC output":0 [ENABLED]
-> "OMAP3 ISP resizer":0 []
pad2: Source
[fmt:unknown/720x624]
-> "OMAP3 ISP preview":0 []
-> "OMAP3 ISP AEWB":0 [ENABLED,IMMUTABLE]
-> "OMAP3 ISP AF":0 [ENABLED,IMMUTABLE]
-> "OMAP3 ISP histogram":0 [ENABLED,IMMUTABLE]
The strange thing is that with these settings the situation is even
worse, i don't get any frames in yavta (while i see interrupts on
omap3isp) even with the "cat /dev/zero" trick.
So you are right, playing with cropping can make it work or not, are
you sure you could set cropping at the ccdc input?
Enrico
Enrico,
Sorry it didn't work. I just wanted to give a hint of what could be
going wrong. I am sorry I don't have time to investigate, I am sure I
could set the cropping at the input of ccdc, and that the result was to
write register ISPCCDC_VERT_START in order to skip the vertical blanking
period correctly. The branch I was on was a bit different though. If you
want to investigate this issue, you will at least need to see what is
written in the registers of the ISP.
Regards,
Julien
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