Re: Problem with em28xx driver in Gumstix Overo
Am Montag 03 Januar 2011 schrieb Devin Heitmueller: On Mon, Jan 3, 2011 at 3:13 PM, Linus Torvalds torva...@linux-foundation.org wrote: // if (!dev-progressive) // height = norm_maxh(dev); This would suggest that the device is providing progressive video and there is a mismatch between the board profile and the actual hardware, which is certainly possible but I know absolutely nothing about the product in question. It would be helpful if we could get the output of dmesg for starters, so we can see which board profile is being used. This main problem seems to be similare to the problem I reportet on 2011-01-01 to the ML, subject: Silver Crest VG2000 USB 2.0 Video Grabber, USB-Id: eb1a:2863 - does not work In the meantime the figures of the partikular device, including dmesg output, is been included in the linuxtv wiki as http://www.linuxtv.org/wiki/index.php/SilverCrest_USB_2.0_Video_Grabber_VG_2000 Best regards Martin -- Was ist der Unterschied zwischen Franken und Oberbayern? - Die Franken haben weniger Berge, aber dafür mehr Horizont. -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Problem with em28xx driver in Gumstix Overo
Hi Marcos,
[ full email quoted for new cc's ]
you really would be much better off sending a diff rather than trying
to explain what changes you did, but quite frankly, even if you did
that, I'd still want this to go through the actual maintainers of the
em28xx driver.
The USB error sounds like some independent unrelated issue, I have no
ideas on it.
Linus
On Mon, Jan 3, 2011 at 5:14 AM, Marcos Alejandro Saldivia Delgado
marcos.saldi...@gmail.com wrote:
Hi Linus .
My name is Marcos Saldivia, and I have a problem with the gumstix Overo
board when trying to capture video with a usb card that it uses the em28xx
driver.
I tried to connect this capture card, it recognized it without problem .
and /dev/video0 appears ok.
but it does not capture nothing .
probe with gstreamer, mplayer and and with this:
cat /dev/video0 sample.mpg
and always the file size is 0
And Modify em28xx-core.c
Original:
/* FIXME: this only function read values from dev */
int em28xx_resolution_set(struct em28xx *dev)
{
int width, height;
width = norm_maxw(dev);
height = norm_maxh(dev);
/* Properly setup VBI */
dev-vbi_width = 720;
if (dev-norm V4L2_STD_525_60)
dev-vbi_height = 12;
else
dev-vbi_height = 18;
if (!dev-progressive)
height = norm_maxh(dev);
em28xx_set_outfmt(dev);
Make it:
/* FIXME: this only function read values from dev */
int em28xx_resolution_set(struct em28xx *dev)
{
int width, height;
width = norm_maxw(dev);
height = norm_maxh(dev);
/* Properly setup VBI */
dev-vbi_width = 720;
if (dev-norm V4L2_STD_525_60)
dev-vbi_height = 12;
else
dev-vbi_height = 18;
// if (!dev-progressive)
// height = norm_maxh(dev);
em28xx_set_outfmt(dev);
Once this change is applied, the video is shown ok, but around the 10
minutes it sends the following message
em28xx #0: cannot change alternate number to 0 (error=-110)
ehci-omap ehci-omap.0: force halt; handshake fa064814 4000 -
-110 submit of urb 1 failed (error=-108)
and it does not work ,it is only necessary to reboot and it returns to
happen the same
you can help me?
thank you very much for any information.
Regards.
--
Marcos Saldivia Delgado
--
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Re: Problem with em28xx driver in Gumstix Overo
On Mon, Jan 3, 2011 at 3:13 PM, Linus Torvalds torva...@linux-foundation.org wrote: // if (!dev-progressive) // height = norm_maxh(dev); This would suggest that the device is providing progressive video and there is a mismatch between the board profile and the actual hardware, which is certainly possible but I know absolutely nothing about the product in question. It would be helpful if we could get the output of dmesg for starters, so we can see which board profile is being used. Cheers, Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Problem with em28xx driver in Gumstix Overo
Hi Marcos, Em 03-01-2011 18:13, Linus Torvalds escreveu: Hi Marcos, [ full email quoted for new cc's ] you really would be much better off sending a diff rather than trying to explain what changes you did, but quite frankly, even if you did that, I'd still want this to go through the actual maintainers of the em28xx driver. As I explained to the email you sent me in priv, It seems that there's a bug at the scaling function. Not sure why this but doesn't show on x86. I intend to do some tests with em28xx and fix the issue, but I can't do it this week. I have a few arm boards, and I'll test on them with some em28xx devices. The USB error sounds like some independent unrelated issue, I have no ideas on it. Yes, it seems to be unrelated. Those video drivers generate a lot of ISOC traffic at the USB bus. I suspect that the hardware have some problems to keep that high bandwidth rate. Maybe one of the ARM maintainers could give us some light around this issue, as this driver doesn't suffer any known issue of this kind on x86 arch. We even did a large stress test on em28xx driver in the past, in order to fix a memory leak there. Cheers, Mauro. -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
