Hi, Am Freitag, den 20.03.2009, 14:24 -0600 schrieb Gordon Smith: > Hello - > > I'm unable to read or stream compressed data from saa7134/saa6752hs. > > I have a RTD Technologies VFG7350 (saa7134 based, two channel, > hardware encoder per channel, no tuner) running current v4l-dvb in > debian 2.6.26-1. > > MPEG2-TS data is normally available on /dev/video2 and /dev/video3. > > Previously there were parameters for the saa6752hs module named > "force" and "ignore" to modify i2c addresses. The current module > appears to lack those parameters and may be using incorrect i2c addresses. > > Current dmesg: > > [ 13.388944] saa6752hs 3-0020: chip found @ 0x40 (saa7133[0]) > [ 13.588458] saa6752hs 4-0020: chip found @ 0x40 (saa7133[1]) > > Prior dmesg (~2.6.25-gentoo-r7 + v4l-dvb ???): > > saa6752hs 1-0021: saa6752hs: chip found @ 0x42 > saa6752hs 1-0021: saa6752hs: chip found @ 0x42 > > Prior modprobe.conf entry: > options saa6752hs force=0x1,0x21,0x2,0x21 ignore=0x0,0x20,0x1,0x20,0x2,0x20 > > > $ v4l2-dbg --device /dev/video2 --info > Driver info: > Driver name : saa7134 > Card type : RTD Embedded Technologies VFG73 > Bus info : PCI:0000:02:08.0 > Driver version: 526 > Capabilities : 0x05000001 > Video Capture > Read/Write > Streaming > > Streaming is a listed capability but the capture example at > http://v4l2spec.bytesex.org/spec/capture-example.html fails > during request for buffers. > > $ v4l2-capture --device /dev/video2 --mmap > /dev/video2 does not support memory mapping > > v4l2-capture.c: > req.count = 4; > req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; > req.memory = V4L2_MEMORY_MMAP; > > if (-1 == xioctl (fd, VIDIOC_REQBUFS, &req)) { > if (EINVAL == errno) { > fprintf (stderr, "%s does not support " > "memory mapping\n", dev_name); > > > A read() results in EIO error: > > $ v4l2-capture --device /dev/video0 --read > read error 5, Input/output error > > v4l2-capture.c: > if (-1 == read (fd, buffers[0].start, buffers[0].length)) { > switch (errno) { > ... > default: > errno_exit ("read"); > > > This behavior does not change if the saa6752hs module is not loaded. > > Is there still a way to modify the i2c address(es) for the saa6752hs module? > > Any pointers are appreciated. > > Gordon > thanks for the report. It was probably forgotten that the prior insmod option had a reason. Try to change it to 0x21 in saa7134-i2c.c static char *i2c_devs[128] = { [ 0x20 ] = "mpeg encoder (saa6752hs)", [ 0xa0 >> 1 ] = "eeprom", [ 0xc0 >> 1 ] = "tuner (analog)", [ 0x86 >> 1 ] = "tda9887", [ 0x5a >> 1 ] = "remote control", }; and report if your cards a usable again. Seems we need the chip address per card without that insmod option and reliable probing. Cheers, Hermann -- 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
