Em Thu, 21 Mar 2013 16:34:13 +0100 Hans Verkuil <hverkuil@xxxxxxxxx> escreveu: > On Thu March 21 2013 11:03:27 Mauro Carvalho Chehab wrote: > > Em Thu, 21 Mar 2013 09:33:41 +0100 > > Hans Verkuil <hverkuil@xxxxxxxxx> escreveu: > > > > > I tried to use my HVR 900 stick today and discovered that it no longer worked. > > > I traced it to commit aab3125c43d8fecc7134e5f1e729fabf4dd196da: "em28xx: add > > > support for registering multiple i2c buses". > > > > > > The kernel messages for when it fails are: > > ... > > > Mar 21 09:26:57 telek kernel: [ 1396.542517] xc2028 12-0061: attaching existing instance > > > Mar 21 09:26:57 telek kernel: [ 1396.542521] xc2028 12-0061: type set to XCeive xc2028/xc3028 tuner > > > Mar 21 09:26:57 telek kernel: [ 1396.542523] em2882/3 #0: em2882/3 #0/2: xc3028 attached > > ... > > > Mar 21 09:26:57 telek kernel: [ 1396.547833] xc2028 12-0061: Error on line 1293: -19 > > > > Probably, the I2C speed is wrong. I noticed a small bug on this patch. > > The following patch should fix it. Could you please test? > > No luck, it didn't help. On a first glance, I've no idea what else is different for devices with just one I2C bus, like HVR-900. Could you send me an USB sniff dump with the kernel that works and with the broken kernel, with this patch applied? The parsing tools are under v4l-utils contrib/ dir. The first step is to check the usbmon interface for capture, with: $ ./parse_tcpdump_log.pl --list-devices usbmon4 ==> 020f (level 2) usbmon2 ==> USB2.0 Hub (level 1) usbmon1 ==> WinTV HVR-930C (level 7) Then, you can run the parser to capture the data: # ./parse_tcpdump_log.pl --device usbmon1 | ./em28xx/parse_em28xx.pl Please load the em28xx driver only after starting the parser, as we want to see what the driver is doing during the initialization. Thanks! Mauro -- 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
