On 05/08/2014 11:30 PM, Marcio Campos de Lima wrote:
> I have also tried these settings
>
> #define VIDIOC_AVANCA_ZOOM (0x009a0000|0x900)+14
> #define VIDIOC_RECUA_ZOOM (0x009a0000|0x900)+14
All controls must have unique IDs, which is clearly not the case for these
two ZOOM controls.
You say you have problems with setting AVANCA_ZOOM, but you don't provide
the code in s_ctrl that actually handles that control, so that makes it
impossible to tell what's going on.
In addition I see a 'return 1' in s_ctrl, which makes no sense since return
codes from s_ctrl must either be 0 (for success) or negative (for error codes).
You really need to give more info (post the entire source?) if you want help.
Regards,
Hans
> #define VIDIOC_ATIVA_FLASH (0x009a0000|0x900)+3
> #define VIDIOC_WHITE_BALANCE (0x009a0000|0x900)+13
>
> Em 08/05/2014, à(s) 18:01, Guennadi Liakhovetski <[email protected]>
> escreveu:
>
>> On Thu, 8 May 2014, Marcio Campos de Lima wrote:
>>
>>> Hi Guennadi
>>> Thank you very much for your answer.
>>> The driver is a modified OV5642.c for the Omnivision OV5642 sensor. The
>>> platform is a custom AT91SAM9M10 board with a camera paralell interface.
>>> the driver is working quite well (capturing images) apart the set control
>>> interface.
>>
>> So, you're using the atmel-isi camera _host_ driver.
>>
>>> Unfortunately I cannot move to the most current kernel now.
>>
>> I don't find VIDIOC_AVANCA_ZOOM in the mainline kernel, it seems to be a
>> part of your modification, so, I don't think I can help you, sorry.
>>
>> Thanks
>> Guennadi
>>
>>> Thanks again
>>> Regards
>>> Marcio
>>> Em 08/05/2014, à(s) 17:14, Guennadi Liakhovetski <[email protected]>
>>> escreveu:
>>>
>>>> Hi Marcio,
>>>>
>>>> Firstly, please direct all V4L related questions to the linux-media list
>>>> (added to CC), secondly, your problem will have much better chances to
>>>> attract attention if you use a current kernel, thirdly, please, specify
>>>> which camera host driver / which ARM platform you're dealing with.
>>>>
>>>> Thanks
>>>> Guennadi
>>>>
>>>> On Thu, 8 May 2014, Marcio Campos de Lima wrote:
>>>>
>>>>> Hi
>>>>>
>>>>> Can anybody tell me why the set control function is not working in Linux
>>>>> 3.6.9? Thanks.
>>>>>
>>>>> —— APPLICATION CALL ——
>>>>> struct v4l2_control controle;
>>>>> controle.id = VIDIOC_AVANCA_ZOOM;
>>>>> controle.value = time;
>>>>> if (-1 == xioctl(fd_camera, VIDIOC_S_CTRL,&controle))
>>>>> {
>>>>> printf ("%s erro\n",__FUNCTION__);
>>>>> perror ("erro iotcl");
>>>>> }
>>>>>
>>>>> The ioctl call returns with invalid argument. It is amazing because the
>>>>> first time the ioctl is called it is executed ok. Then no more call is
>>>>> allowed and return the invalid
>>>>>
>>>>> below is the device driver code I think may be relevant.
>>>>>
>>>>> v4l2_ctrl_handler_init(&priv->ctrls, ARRAY_SIZE(ov5642_ctrls));
>>>>> printk ("handler_init\n");
>>>>> v4l2_ctrl_new_std(&priv->ctrls,
>>>>> &ov5642_ctrl_ops,V4L2_CID_ZOOM_RELATIVE, -1000, 1000, 1, 500);
>>>>> v4l2_ctrl_new_std(&priv->ctrls, &ov5642_ctrl_ops,V4L2_CID_FLASH_STROBE,
>>>>> -100, 100, 1, 5);
>>>>>
>>>>>
>>>>> priv->subdev.ctrl_handler=&priv->ctrls;
>>>>> v4l2_i2c_subdev_init(&priv->subdev, client, &ov5642_subdev_ops);
>>>>> return ov5642_video_probe(client);
>>>>>
>>>>> static int ov5642_s_ctrl(struct v4l2_ctrl *ctrl)
>>>>> {
>>>>> struct ov5642 *ov5642 =
>>>>> container_of(ctrl->handler, struct ov5642, ctrls);
>>>>> struct i2c_client *client = v4l2_get_subdevdata(&ov5642->subdev);
>>>>> u16 data;
>>>>> int ret;
>>>>> printk ("%s: id=%08x val=%d\n",__FUNCTION__, ctrl->id, ctrl->val);
>>>>> switch (ctrl->id) {
>>>>> case V4L2_CID_DO_WHITE_BALANCE:
>>>>> ov5640_set_wb_oem(client, ctrl->val);
>>>>> break;
>>>>> case V4L2_CID_EXPOSURE:
>>>>>
>>>>> break;
>>>>> case V4L2_CID_GAIN:
>>>>> /* Gain is controlled by 2 analog stages and a digital stage.
>>>>> * Valid values for the 3 stages are
>>>>> *
>>>>> * Stage Min Max Step
>>>>> * ------------------------------------------
>>>>> * First analog stage x1 x2 1
>>>>> * Second analog stage x1 x4 0.125
>>>>> * Digital stage x1 x16 0.125
>>>>> *
>>>>> * To minimize noise, the gain stages should be used in the
>>>>> * second analog stage, first analog stage, digital stage order.
>>>>> * Gain from a previous stage should be pushed to its maximum
>>>>> * value before the next stage is used.
>>>>> */
>>>>> if (ctrl->val <= 32) {
>>>>> data = ctrl->val;
>>>>> } else if (ctrl->val <= 64) {
>>>>> ctrl->val &= ~1;
>>>>> data = (1 << 6) | (ctrl->val >> 1);
>>>>> } else {
>>>>> ctrl->val &= ~7;
>>>>> data = ((ctrl->val - 64) << 5) | (1 << 6) | 32;
>>>>> }
>>>>> break;
>>>>> case V4L2_CID_ZOOM_RELATIVE:
>>>>> if (ctrl->val>0)
>>>>> avanca_zoom(sysPriv.v4l2_int_device, ctrl->val);
>>>>> else
>>>>> recua_zoom(sysPriv.v4l2_int_device, ctrl->val);
>>>>>
>>>>> break;
>>>>> case V4L2_CID_BRIGHTNESS:
>>>>> ov5640_set_brightness(client, ctrl->val);
>>>>> break;
>>>>> case V4L2_CID_CONTRAST:
>>>>> ov5640_set_contrast(client, ctrl->val);
>>>>> break;
>>>>> case V4L2_CID_FLASH_STROBE:
>>>>> ativa_flash (sysPriv.v4l2_int_device, ctrl->val);
>>>>> break;
>>>>> case V4L2_CID_VFLIP:
>>>>>
>>>>> case V4L2_CID_TEST_PATTERN:
>>>>>
>>>>>
>>>>>
>>>>> case V4L2_CID_BLC_AUTO:
>>>>>
>>>>> case V4L2_CID_BLC_TARGET_LEVEL:
>>>>>
>>>>> case V4L2_CID_BLC_ANALOG_OFFSET:
>>>>>
>>>>> case V4L2_CID_BLC_DIGITAL_OFFSET:
>>>>> return 1;
>>>>> }
>>>>>
>>>>> return 0;
>>>>> }
>>>>>
>>>>> static struct v4l2_ctrl_ops ov5642_ctrl_ops = {
>>>>> .s_ctrl = ov5642_s_ctrl,
>>>>> };
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> linux-arm-kernel mailing list
>>>>> [email protected]
>>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>>>>
>>>>
>>>> ---
>>>> Guennadi Liakhovetski, Ph.D.
>>>> Freelance Open-Source Software Developer
>>>> http://www.open-technology.de/
>>>
>>
>> ---
>> Guennadi Liakhovetski, Ph.D.
>> Freelance Open-Source Software Developer
>> http://www.open-technology.de/
>
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