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Date: Wed, 17 Mar 2010 00:06:45 +0100
From: Rodolfo Giometti <giometti@enneenne.com>
To: Guennadi Liakhovetski <kernel@pengutronix.de>
Cc: linux-media@vger.kernel.org
Message-ID: <20100316230645.GA26770@enneenne.com>
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Subject: PXA camera and Planar YUV422 16 bit camera
Sender: linux-media-owner@vger.kernel.org
List-ID: <linux-media.vger.kernel.org>

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

-- 

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Linux Device Driver                          giometti@linux.it
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