PXA camera and Planar YUV422 16 bit camera

PXA camera and Planar YUV422 16 bit camera

[Rodolfo Giometti]

Hello,

I'm puzzled to know if the pxa_camera driver can manage a data depth
different from 8 bits.

I'm currently trying to add a camera interface support to my PXA270
based board with an adv7180 as soc camera device.

For the adv7180 I defined:

static const struct soc_camera_data_format adv7180_colour_formats[] =
{
        {
                .name           = "Planar YUV422 16 bit",
                .depth          = 16,
                .fourcc         = V4L2_PIX_FMT_YUV422P,
                .colorspace     = V4L2_COLORSPACE_JPEG,
        }
};

but this is rejected by the pxa_camera driver buswidth_supported().

On the other hands if I set .depth = 8 in above struct I get the
following:

debian:~# gst-launch v4l2src ! video/x-raw-yuv,width=320,height=240 !
filesink location=/tmp/video.raw
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
WARNING: from element /pipeline0/v4l2src0: Could not get parameters on
device '/dev/video0'
Additional debug info:
v4l2src_calls.c(1172): gst_v4l2src_set_capture ():
/pipeline0/v4l2src0:
system error: Invalid argument
Setting pipeline to PLAYING ...
New clock: GstSystemClock
WARNING: from element /pipeline0/v4l2src0: Got unexpected frame size
of 76800 instead of 153600.
Additional debug info:
gstv4l2src.c(1077): gst_v4l2src_get_mmap (): /pipeline0/v4l2src0
WARNING: from element /pipeline0/v4l2src0: Got unexpected frame size
of 76800 instead of 153600.

That is the pax_camera device returns 8bits per pixel instead of 16...

Can you please help me in finding what's wrong? :'(

Thanks in advance,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail: giometti@enneenne.com
Linux Device Driver                          giometti@linux.it
Embedded Systems                     phone:  +39 349 2432127
UNIX programming                     skype:  rodolfo.giometti
Freelance ICT Italia - Consulente ICT Italia - www.consulenti-ict.it

Re: PXA camera and Planar YUV422 16 bit camera

[Guennadi Liakhovetski]

Hi Rodolfo

On Wed, 17 Mar 2010, Rodolfo Giometti wrote:

> Hello,
> 
> I'm puzzled to know if the pxa_camera driver can manage a data depth
> different from 8 bits.
> 
> I'm currently trying to add a camera interface support to my PXA270
> based board with an adv7180 as soc camera device.
> 
> For the adv7180 I defined:
> 
> static const struct soc_camera_data_format adv7180_colour_formats[] =
> {
>         {
>                 .name           = "Planar YUV422 16 bit",
>                 .depth          = 16,
>                 .fourcc         = V4L2_PIX_FMT_YUV422P,
>                 .colorspace     = V4L2_COLORSPACE_JPEG,
>         }
> };

first, you're working with an outdated kernel, don't think I'll be able to 
help you with that.

> but this is rejected by the pxa_camera driver buswidth_supported().
> 
> On the other hands if I set .depth = 8 in above struct I get the
> following:

Please, update your kernel to the current state. YUV422P is not supported 
by pxa natively, so, it can only be handled in the pass-through mode. 
Further, adv7180 is currently unsuitable for soc-camera, you have to 
modify it after updating to the current kernel. Then please show us your 
patch for adv7180, then we'll try to help you further.

> debian:~# gst-launch v4l2src ! video/x-raw-yuv,width=320,height=240 !
> filesink location=/tmp/video.raw
> Setting pipeline to PAUSED ...
> Pipeline is live and does not need PREROLL ...
> WARNING: from element /pipeline0/v4l2src0: Could not get parameters on
> device '/dev/video0'
> Additional debug info:
> v4l2src_calls.c(1172): gst_v4l2src_set_capture ():
> /pipeline0/v4l2src0:
> system error: Invalid argument
> Setting pipeline to PLAYING ...
> New clock: GstSystemClock
> WARNING: from element /pipeline0/v4l2src0: Got unexpected frame size
> of 76800 instead of 153600.
> Additional debug info:
> gstv4l2src.c(1077): gst_v4l2src_get_mmap (): /pipeline0/v4l2src0
> WARNING: from element /pipeline0/v4l2src0: Got unexpected frame size
> of 76800 instead of 153600.
> 
> That is the pax_camera device returns 8bits per pixel instead of 16...
> 
> Can you please help me in finding what's wrong? :'(

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/