[pwc] VIDIOC_G_CTRL and V4L2_CID_AUTOGAIN

[Sander Jansen <>]

Here's a piece of code to get the state of V4L2_CID_AUTOGAIN (as used by 
VIDIOC_G_CTRL)::

case V4L2_CID_AUTOGAIN:
        ret = pwc_get_agc(pdev, &c->value);
        if (ret<0)
           return -EINVAL;
        if (c->value>=0)
           c->value=0;
        else
           c->value=1;
        printk("pwc: V4L2_CID_AUTOGAIN()=%d\n",c->value);
        return 0;              

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