On Saturday, January 22, 2011 11:28:33 Anca Emanuel wrote: > On Tue, Jan 18, 2011 at 3:37 PM, Claudiu Covaci > <claudiu.covaci@xxxxxxxxx> wrote: > > Hi, > > > > I'm have trouble receiving a video stream on the Freescale i.MX51 > > processor. I've tried everything I could think, so I'm trying my luck > > here. > > > > I'm using a 2.6.31 kernel with some modifications: the camera capture > > driver [1] and the IPU (Image Processing Unit) driver [2] from the > > Freescale BSP 2010.11. > > > > I'm at a point where I can open the /dev/video0 device and can (at > > least try to) read frames, but it fails at dequeueing the video > > buffers (VIDIOC_DQBUF) with the message: > > <3>ERROR: v4l2 capture: mxc_v4l_dqueue timeout enc_counter 0 > > Unable to dequeue buffer (62). > > > > - I've double-checked the IPU registers and they seem properly > > configured, but I don't get any interrupt (at end-of-frame). > > - The relevant IOMUX pins are also configured. > > - the video signal appears at the i.MX pins (so it gets there) > > - I've also tried activating the internal picture generator, but still > > nothing happens. > > > > Is there anything I overlooked? Is there a way to find out where the > > problem is? Any hints will be greatly appreciated. > > > > Thanks! > > Claudiu > > > > [1] http://opensource.freescale.com/git?p=imx/linux-2.6-imx.git;a=blob;f=drivers/media/video/mxc/capture/mxc_v4l2_capture.c;h=8133d202304eea22e94bbd8eaaa215002b2dc675;hb=0fae922f451a5bde63595a2e0c2cd7079f083440 > > > > [2] http://opensource.freescale.com/git?p=imx/linux-2.6-imx.git;a=tree;f=drivers/mxc/ipu3;h=288c21f88aa650d16d843dccec2b04ba9f1462f7;hb=0fae922f451a5bde63595a2e0c2cd7079f083440 > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-media" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > Hi Hans, Jean, Mauro: > No ideea to help Claudiu ? Not me, no. But since no interrupt arrives that typically means that either some pin assignments are wrong or some video format settings are wrong. >From personal experience with other (non-freescale) boards in the past I know that that can be hard to track down. Regards, Hans -- Hans Verkuil - video4linux developer - sponsored by Cisco -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
