Hi, On Thu, Feb 5, 2015 at 11:29 AM, Yani Ioannou <yani.ioannou@xxxxxxxxx> wrote: > Hi, > > I've been trying to debug why the sensor hub on a Surface pro 3 isn't > detected in the latest mainline kernel (3.19-rc6). When I enable debug > I get the following output showing a bunch of errors trying to > communicate with the device MSHW0030, which seems to be the sensor > hub. These errors do not bother me that much. They appear when we try to read the reports from the device, and this has been known to not work on many devices. As long as the device emits by itself the reports, we are fine. There has been very few changes in the v3.19 series regarding i2c-hid, so if you get the same debug output on a v3.18 kernel (and the sensor hub works), I would think that the problem you are having is in the IIO subsystem. Cheers, Benjamin > > I've looked into the code/protocol a little and it seems the initial > feature reports that are returned are of incorrect size, but I don't > understand why without much prior knowledge of the domain. > > Any help and/or further debugging tips would be greatly appreciated. > > Thanks, > Yani > > [ 83.133219] i2c_hid i2c-MSHW0030:00: Fetching the HID descriptor > [ 83.133224] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=01 00 > [ 83.134826] i2c_hid i2c-MSHW0030:00: HID Descriptor: 1e 00 00 01 bf > 08 02 00 03 00 3f 00 04 00 3f 00 05 00 06 00 5e 04 c4 07 04 00 00 00 > 00 00 > [ 83.134928] i2c_hid i2c-MSHW0030:00: entering i2c_hid_parse > [ 83.134932] i2c_hid i2c-MSHW0030:00: i2c_hid_hwreset > [ 83.134935] i2c_hid i2c-MSHW0030:00: i2c_hid_set_power > [ 83.134938] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 00 08 > [ 83.135629] i2c_hid i2c-MSHW0030:00: resetting... > [ 83.135633] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 00 01 > [ 83.136305] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: waiting... > [ 83.138471] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: finished. > [ 83.138475] i2c_hid i2c-MSHW0030:00: asking HID report descriptor > [ 83.138477] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=02 00 > [ 83.191568] i2c_hid i2c-MSHW0030:00: Report Descriptor: 05 20 09 01 > a1 01 85 01 05 20 09 73 a1 00 0a 09 03 15 00 25 02 75 08 95 01 a1 02 > 0a 30 08 0a 31 08 0a 32 08 b1 00 c0 0a 0e 03 15 00 27 ff ff ff ff 75 > 20 95 01 55 00 b1 02 0a 52 14 15 00 26 ff > [ 83.193819] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.193822] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 31 02 06 00 > [ 83.194952] i2c_hid i2c-MSHW0030:00: report (len=14): 0e 00 01 01 60 > 00 00 00 14 00 01 06 02 10 > [ 83.194957] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.194959] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 32 02 06 00 > [ 83.196162] i2c_hid i2c-MSHW0030:00: report (len=14): 0e 00 02 01 10 > 00 00 00 00 00 01 06 02 10 > [ 83.196166] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.196167] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 33 02 06 00 > [ 83.196991] i2c_hid i2c-MSHW0030:00: report (len=14): 0e 00 03 01 c8 > 00 00 00 00 00 01 06 02 c8 > [ 83.196998] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.197000] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 34 02 06 00 > [ 83.198233] i2c_hid i2c-MSHW0030:00: report (len=30): 1e 00 04 01 64 > 00 00 00 3c 00 0a 00 64 00 0b 00 64 00 40 1f f4 01 41 1f 64 00 01 06 > 02 64 > [ 83.198238] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.198240] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 35 02 06 00 > [ 83.199093] i2c_hid i2c-MSHW0030:00: report (len=14): 0e 00 05 01 10 > 00 00 00 00 00 01 06 02 10 > [ 83.199096] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.199098] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 36 02 06 00 > [ 83.199699] i2c_hid i2c-MSHW0030:00: report (len=14): 0e 00 06 01 10 > 00 00 00 00 00 01 06 02 10 > [ 83.199703] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.199705] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 20 06 00 > [ 83.202008] i2c_hid i2c-MSHW0030:00: report (len=63): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.202011] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:63 / ret_size:0 > [ 83.202014] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.202015] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 21 06 00 > [ 83.204331] i2c_hid i2c-MSHW0030:00: report (len=63): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.204335] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:63 / ret_size:0 > [ 83.204337] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.204339] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 22 06 00 > [ 83.205447] i2c_hid i2c-MSHW0030:00: report (len=19): 13 00 22 cb a8 > 07 02 03 00 00 00 00 00 00 00 00 00 00 00 > [ 83.205451] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.205453] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 23 06 00 > [ 83.206745] i2c_hid i2c-MSHW0030:00: report (len=19): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.206749] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:19 / ret_size:0 > [ 83.206752] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.206753] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 24 06 00 > [ 83.207780] i2c_hid i2c-MSHW0030:00: report (len=19): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.207783] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:19 / ret_size:0 > [ 83.207786] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.207788] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 25 06 00 > [ 83.208803] i2c_hid i2c-MSHW0030:00: report (len=19): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.208806] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:19 / ret_size:0 > [ 83.208809] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.208811] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 26 06 00 > [ 83.209824] i2c_hid i2c-MSHW0030:00: report (len=19): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.209826] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:19 / ret_size:0 > [ 83.209828] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.209830] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 27 06 00 > [ 83.210588] i2c_hid i2c-MSHW0030:00: report (len=19): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.210590] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:19 / ret_size:0 > [ 83.210592] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.210594] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 28 06 00 > [ 83.211659] i2c_hid i2c-MSHW0030:00: report (len=19): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.211661] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:19 / ret_size:0 > [ 83.211663] i2c_hid i2c-MSHW0030:00: i2c_hid_get_report > [ 83.211665] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 3f > 02 29 06 00 > [ 83.212971] i2c_hid i2c-MSHW0030:00: report (len=19): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.212975] i2c_hid i2c-MSHW0030:00: error in i2c_hid_init_report > size:19 / ret_size:0 > [ 83.215406] i2c_hid i2c-MSHW0030:00: i2c_hid_set_power > [ 83.215410] i2c_hid i2c-MSHW0030:00: __i2c_hid_command: cmd=05 00 01 08 > [ 83.268607] i2c_hid i2c-NTRG0001:01: Fetching the HID descriptor > [ 83.268613] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=01 00 > [ 83.270130] i2c_hid i2c-NTRG0001:01: HID Descriptor: 1e 00 00 01 c7 > 01 02 00 03 00 1f 00 00 00 00 00 05 00 06 00 96 1b 05 1b 04 00 00 00 > 00 00 > [ 83.270211] i2c_hid i2c-NTRG0001:01: entering i2c_hid_parse > [ 83.270213] i2c_hid i2c-NTRG0001:01: i2c_hid_hwreset > [ 83.270215] i2c_hid i2c-NTRG0001:01: i2c_hid_set_power > [ 83.270216] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 00 08 > [ 83.270902] i2c_hid i2c-NTRG0001:01: resetting... > [ 83.270904] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 00 01 > [ 83.271685] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: waiting... > [ 83.461132] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: finished. > [ 83.461137] i2c_hid i2c-NTRG0001:01: asking HID report descriptor > [ 83.461140] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=02 00 > [ 83.471968] i2c_hid i2c-NTRG0001:01: Report Descriptor: 05 0d 09 02 > a1 01 85 01 09 20 35 00 a1 00 09 32 09 42 09 44 09 3c 09 45 15 00 25 > 01 75 01 95 05 81 02 95 03 81 03 05 01 09 30 75 10 95 01 a4 55 0e 65 > 11 46 ec 09 26 80 25 81 42 09 31 46 9d 06 > [ 83.472540] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.472542] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 3c 02 06 00 > [ 83.473498] i2c_hid i2c-NTRG0001:01: report (len=9): 00 00 00 00 00 00 00 00 00 > [ 83.473507] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:9 / ret_size:0 > [ 83.473515] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.473520] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 3b 02 06 00 > [ 83.473867] i2c_hid i2c-NTRG0001:01: report (len=5): 00 00 00 00 00 > [ 83.473872] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:5 / ret_size:0 > [ 83.473875] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.473878] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 3f > 02 11 06 00 > [ 83.474493] i2c_hid i2c-NTRG0001:01: report (len=5): 03 01 1b 29 a9 > [ 83.474497] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:5 / ret_size:259 > [ 83.474500] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.474503] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 3f > 02 15 06 00 > [ 83.475186] i2c_hid i2c-NTRG0001:01: report (len=8): 03 01 1b 29 a9 19 9f 9a > [ 83.475190] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:8 / ret_size:259 > [ 83.475192] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.475195] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 3f > 02 18 06 00 > [ 83.476035] i2c_hid i2c-NTRG0001:01: report (len=15): 03 01 1b 29 a9 > 19 9f 9a 19 a4 bf dd c2 f3 29 > [ 83.476039] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:15 / ret_size:259 > [ 83.476041] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.476044] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 34 02 06 00 > [ 83.476354] i2c_hid i2c-NTRG0001:01: report (len=4): 04 00 04 0a > [ 83.476360] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.476363] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 3a 02 06 00 > [ 83.476673] i2c_hid i2c-NTRG0001:01: report (len=4): 00 00 00 00 > [ 83.476676] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:4 / ret_size:0 > [ 83.476679] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.476682] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 3f > 02 1b 06 00 > [ 83.482978] i2c_hid i2c-NTRG0001:01: report (len=259): 03 01 1b 29 a9 > 19 9f 9a 19 a4 bf dd c2 f3 29 e1 34 44 89 23 3f 8c 56 79 f3 fc 57 d0 > ea 56 46 23 9a 15 d8 5a de 99 5e 2f fc 9f e2 f4 73 df d5 c5 36 ed 8d > 4e 28 db 8c 34 a3 b0 19 5c 4f ae bf 9c > [ 83.482986] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.482988] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 35 02 06 00 > [ 83.485124] i2c_hid i2c-NTRG0001:01: report (len=63): 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 00 00 00 00 00 00 00 00 00 00 00 00 > [ 83.485127] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:63 / ret_size:0 > [ 83.485128] i2c_hid i2c-NTRG0001:01: i2c_hid_get_report > [ 83.485130] i2c_hid i2c-NTRG0001:01: __i2c_hid_command: cmd=05 00 37 02 06 00 > [ 83.486010] i2c_hid i2c-NTRG0001:01: report (len=7): 00 00 00 00 00 00 00 > [ 83.486012] i2c_hid i2c-NTRG0001:01: error in i2c_hid_init_report > size:7 / ret_size:0 > [ 83.486096] input: NTRG0001:01 1B96:1B05 Pen as > /devices/pci0000:00/INT33C3:00/i2c-10/i2c-NTRG0001:01/0018:1B96:1B05.0008/input/input16 > [ 83.486306] input: NTRG0001:01 1B96:1B05 as > /devices/pci0000:00/INT33C3:00/i2c-10/i2c-NTRG0001:01/0018:1B96:1B05.0008/input/input17 > [ 83.488543] hid-multitouch 0018:1B96:1B05.0008: input,hidraw4: > <UNKNOWN> HID v1.00 Mouse [NTRG0001:01 1B96:1B05] on > -- > To unsubscribe from this list: send the line "unsubscribe linux-input" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- 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