On Mon, Feb 1, 2016 at 10:14 AM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
>
>
> On 02/01/2016 09:00 AM, Ran Shalit wrote:
>> On Sun, Jan 31, 2016 at 10:35 PM, Ran Shalit <ranshalit@xxxxxxxxx> wrote:
>>> Hello,
>>>
>>> Maybe someone will have some idea about the following:
>>> I am using a pci card (not video card, just some dummy pci card), to
>>> check v4l2 template for PCIe card (I used solo6x10 as template for the
>>> driver and moved all hardware related to video into remarks).
>>> I don't use any register read/write to hardware (just dummy functions).
>>>
>>> I get that load/unload of module is successful.
>>> But on trying to start reading video frames (using read method with
>>> v4l API userspace example), I get that the whole operating system is
>>> freezed, and I must reboot the machine.
>>> This is the queue_setup callback:
>>>
>>> static int test_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
>>> unsigned int *num_buffers, unsigned int *num_planes,
>>> unsigned int sizes[], void *alloc_ctxs[])
>>> {
>>> struct test_dev *solo_dev = vb2_get_drv_priv(q);
>>> dev_info(&test_dev->pdev->dev,"test_queue_setup\n");
>>> sizes[0] = test_image_size(test_dev);
>>> alloc_ctxs[0] = solo_dev->alloc_ctx;
>>> *num_planes = 1;
>>>
>>> if (*num_buffers < MIN_VID_BUFFERS)
>>> *num_buffers = MIN_VID_BUFFERS;
>>>
>>> return 0;
>>> }
>>>
>>> static const struct vb2_ops test_video_qops = {
>>> .queue_setup = test_queue_setup,
>>> .buf_queue = test_buf_queue,
>>> .start_streaming = test_start_streaming, <- does nothing
>>> .stop_streaming = test_stop_streaming, <- does nothing
>>> .wait_prepare = vb2_ops_wait_prepare,
>>> .wait_finish = vb2_ops_wait_finish,
>>> };
>>>
>>>
>>> I didn't find anything suspicious in the videobuf2 callback that can
>>> explain these freeze.( start_streaming,stop_streaming contains just
>>> printk with function name).
>>> I also can't know where it got stuck (The system is freezed without
>>> any logging on screen, all log is in dmesg).
>>>
>>> Thank for any idea,
>>> Ran
>>
>> On start reading frames (using read or mmap method), it seems as if
>> there is some collisions between the pci video card and another card
>> (becuase the monitor is also printed with strange colors as the moment
>> the OS freezes) .
>> I validated again that the PCIe boards IDs in the table are correct
>> (it matches only the dummy pcie card when it is connected ).
>> I also tried to comment out the irq request, to be sure that there is
>> no irq collision with another board, but it still get freezed anyway.
>
> I can't tell anything from this, I'd need to see the full source.
>
> Regards,
>
> Hans
Thank you Hans,
The source code base on solo6x10 as template , and kernel 3.10.0.229
(I needed to use this kernel version instead of latest as start point
because of other pacakge , Intel's media sdk encoder ) :
https://drive.google.com/file/d/0B22GsWueReZTSElIUEJJSHplUVU/view?usp=sharing
- This package compiled with the makefile
- relevant changes are in solo6x10-core.c & solo6x10-v4l2.c
Best Regards,
Ran
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