Date: Mon, 29 Aug 2016 00:53:55 +0100 From: Miguel C <miguelmclara@gmail.com> To: Hans Petter Selasky <hps@selasky.org> Cc: Oleg Nauman <oleg.nauman@gmail.com>, "freebsd-multimedia@freebsd.org" <freebsd-multimedia@freebsd.org> Subject: Re: [CFT] New version of webcamd, now v4.8.0.2 Message-ID: <CADGo8CUx9yMNPZ0mCk-GzdpvsWESgiy_mKaXQBC=K93xtd_qNQ@mail.gmail.com> In-Reply-To: <cc2351e2-c171-4b35-0284-5ef21bbeee85@selasky.org> References: <d2b588e6-33b3-9523-1551-a1d9deabdf8c@selasky.org> <CAC5YPTuYnx=_riiW6uiVGzKbcK-kLsb81bX1u4JUc8CCz%2BAoXg@mail.gmail.com> <CADGo8CUKUA3GR_Y5yjx9x5z6jd-3HZTBXjV9xyKF%2BAmPrrs0Hw@mail.gmail.com> <050b048b-b73d-0823-885a-e8ab88f070e8@selasky.org> <CADGo8CX_kw_Cofhe4nh%2B-a4kq-h_CHvvHboJPWTPgcFxkmN0ew@mail.gmail.com> <cc2351e2-c171-4b35-0284-5ef21bbeee85@selasky.org>
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On Sun, Aug 28, 2016 at 7:21 PM, Hans Petter Selasky <hps@selasky.org>
wrote:
> On 08/28/16 16:02, Miguel C wrote:
>
>> On Sun, Aug 28, 2016 at 12:53 PM, Hans Petter Selasky <hps@selasky.org>
>> wrote:
>>
>>
> Hi,
>
> The descriptors you sent look OK.
>
> Can you run webcamd from gdb and trace all the parameters and code path
> taken inside the function named usb_setup_endpoint which triggers after you
> run pwcview ?
>
> gdb
> file webcamd
> run -d ugenX.Y
> CTRL+C
> break usb_setup_endpoint
> continue
> next
> next
> next
> ....
>
>
> Let's skip Freebsd-current and freebsd-x11 in the CC'ing of this thread to
> reduce the amount of cross-posting? Or which list do you prefer?
Sure multimedia@ seems fine
Lets see if I got this right (let me know if its best to upload this...
just feel like its important to keep the "text" in the archive for future
reference:
gdb) continue
Continuing.
Creating /dev/video0
[New Thread 802017400 (LWP 100268/webcamd)]
[New Thread 802019200 (LWP 100303/webcamd)]
[Switching to Thread 802019200 (LWP 100303/webcamd)]
Breakpoint 1, usb_setup_endpoint (dev=0x802076000, uhe=0x8020764a0,
bufsize=16)
at kernel/linux_usb.c:923
923 uint8_t type = uhe->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
(gdb) next
924 uint8_t addr = uhe->desc.bEndpointAddress;
(gdb) next
925 uint8_t ep_index = ((addr / 0x40) | (addr * 4)) % (16 * 4);
(gdb) next
928 if (uhe->bsd_xfer[0] ||
(gdb) next
931 return (0);
(gdb) next
1030 }
(gdb) next
usb_submit_urb (urb=0x802092070, mem_flags=0) at kernel/linux_usb.c:613
613 err = usb_setup_endpoint(urb->dev, uhe,
(gdb) next
615 if (err) {
(gdb) next
624 if (uhe->bsd_xfer[0] ||
(gdb) next
629 if (urb->bsd_urb_list.tqe_prev == NULL) {
(gdb) next
630 TAILQ_INSERT_TAIL(&uhe->bsd_urb_list, urb, bsd_urb_list);
(gdb) next
631 urb->status = -EINPROGRESS;
(gdb) next
638 if (urb->bsd_no_resubmit == 0) {
(gdb) next
639 usb_submit_urb_sub(uhe->bsd_xfer[0]);
(gdb) next
640 usb_submit_urb_sub(uhe->bsd_xfer[1]);
(gdb) next
642 err = 0;
(gdb) next
643 } else {
(gdb) next
648 atomic_unlock();
(gdb) next
649 return (err);
(gdb) next
650 }
(gdb) next
uvc_status_start (dev=0x802047180, flags=0)
at media_tree/drivers/media/usb/uvc/uvc_status.c:214
214 return usb_submit_urb(dev->int_urb, flags);
(gdb) next
215 }
(gdb) next
uvc_v4l2_open (file=0x80220d020) at
media_tree/drivers/media/usb/uvc/uvc_v4l2.c:514
514 ret = uvc_status_start(stream->dev, GFP_KERNEL);
(gdb) next
515 if (ret < 0) {
(gdb) next
521 }
(gdb) next
523 stream->dev->users++;
(gdb) next
524 mutex_unlock(&stream->dev->lock);
(gdb) next
526 v4l2_fh_init(&handle->vfh, &stream->vdev);
(gdb) next
527 v4l2_fh_add(&handle->vfh);
(gdb) next
528 handle->chain = stream->chain;
(gdb) next
529 handle->stream = stream;
(gdb) next
530 handle->state = UVC_HANDLE_PASSIVE;
(gdb) next
531 file->private_data = handle;
(gdb) next
533 return 0;
(gdb) next
534 }
(gdb) next
v4l2_open (inode=0x80220d008, filp=0x80220d020)
at media_tree/drivers/media/v4l2-core/v4l2-dev.c:453
453 ret = vdev->fops->open(filp);
(gdb) next
456 }
(gdb) next
458 if (vdev->dev_debug & V4L2_DEV_DEBUG_FOP)
(gdb) next
462 if (ret)
(gdb) next
464 return ret;
(gdb) next
465 }
(gdb) next
linux_open (f_v4b=0, fflags=0) at kernel/linux_file.c:65
65 return (handle);
(gdb) next
66 }
(gdb) next
v4b_open (cdev=0x802052030, fflags=1)
at /usr/home/user/webcamd_src/webcamd-4.8.0.4/webcamd.c:211
211 handle = linux_open(f_v4b, fflags_linux);
(gdb) next
213 if (handle == NULL) {
(gdb) next
217 cuse_dev_set_per_file_handle(cdev, handle);
(gdb) next
218 return (0);
(gdb) next
219 }
pwcview --> Failed to get current picture info: Invalid argument
>
>
> --HPS
>
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