Dr. Iwai, here's the additional debugging information you asked for.
First dyndbg log is for successful engagement of implicit feedback sync on
the playback.
Second case I modified snd_usb_parse_implicit_fb_quirk to return 0 as it
would normally, unsuccessful.
Third is lsusb -v of Pioneer DJ DDJ-SR2.
I think I know now why we need to return 1 like a capture quirk was found
inside snd_usb_parse_implicit_fb_quirk: if we don't it triggers sync ep
code inside pcm.c
As always, thank you for your time.
---
[ 6397.520597] xhci_hcd 0000:00:14.0: Port change event, 3-1, id 1, portsc:
0xa0206e1
[ 6397.520619] xhci_hcd 0000:00:14.0: resume root hub
[ 6397.520647] xhci_hcd 0000:00:14.0: handle_port_status: starting port
polling.
[ 6397.520747] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x206e1,
return 0x10101
[ 6397.520950] xhci_hcd 0000:00:14.0: clear port1 connect change, portsc:
0x6e1
[ 6397.521111] xhci_hcd 0000:00:14.0: Get port status 3-2 read: 0x2a0,
return 0x100
[ 6397.521147] xhci_hcd 0000:00:14.0: Get port status 3-3 read: 0x2a0,
return 0x100
[ 6397.521179] xhci_hcd 0000:00:14.0: Get port status 3-4 read: 0x2a0,
return 0x100
[ 6397.626337] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x6e1,
return 0x101
[ 6397.626387] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.626432] xhci_hcd 0000:00:14.0: Adding 1 ep ctx, 1 now active.
[ 6397.626441] xhci_hcd 0000:00:14.0: Slot 5 output ctx = 0x13efdc000 (dma)
[ 6397.626447] xhci_hcd 0000:00:14.0: Slot 5 input ctx = 0x13ec75000 (dma)
[ 6397.626456] xhci_hcd 0000:00:14.0: Set slot id 5 dcbaa entry
00000000225b73b8 to 0x13efdc000
[ 6397.626515] xhci_hcd 0000:00:14.0: set port reset, actual port 3-1
status = 0x791
[ 6397.629635] xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping port
polling.
[ 6397.681751] xhci_hcd 0000:00:14.0: Port change event, 3-1, id 1, portsc:
0x200e03
[ 6397.681768] xhci_hcd 0000:00:14.0: handle_port_status: starting port
polling.
[ 6397.693020] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x200e03,
return 0x100503
[ 6397.693084] xhci_hcd 0000:00:14.0: clear port1 reset change, portsc:
0xe03
[ 6397.719619] xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping port
polling.
[ 6397.749662] usb 3-1: new high-speed USB device number 6 using xhci_hcd
[ 6397.749689] xhci_hcd 0000:00:14.0: Set root hub portnum to 1
[ 6397.749697] xhci_hcd 0000:00:14.0: Set fake root hub portnum to 1
[ 6397.749702] xhci_hcd 0000:00:14.0: udev->tt = 0000000000000000
[ 6397.749709] xhci_hcd 0000:00:14.0: udev->ttport = 0x0
[ 6397.749720] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.749762] xhci_hcd 0000:00:14.0: Successful setup context command
[ 6397.749771] xhci_hcd 0000:00:14.0: Op regs DCBAA ptr = 0x00000236cef000
[ 6397.749778] xhci_hcd 0000:00:14.0: Slot ID 5 dcbaa entry
@00000000225b73b8 = 0x0000013efdc000
[ 6397.749787] xhci_hcd 0000:00:14.0: Output Context DMA address =
0x13efdc000
[ 6397.749792] xhci_hcd 0000:00:14.0: Internal device address = 0
[ 6397.749878] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6397.749925] xhci_hcd 0000:00:14.0: set port reset, actual port 3-1
status = 0xf91
[ 6397.805146] xhci_hcd 0000:00:14.0: Port change event, 3-1, id 1, portsc:
0x200e03
[ 6397.805161] xhci_hcd 0000:00:14.0: handle_port_status: starting port
polling.
[ 6397.816340] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x200e03,
return 0x100503
[ 6397.816403] xhci_hcd 0000:00:14.0: clear port1 reset change, portsc:
0xe03
[ 6397.872940] xhci_hcd 0000:00:14.0: Resetting device with slot ID 5
[ 6397.872964] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.872979] xhci_hcd 0000:00:14.0: Completed reset device command.
[ 6397.872995] xhci_hcd 0000:00:14.0: Can't reset device (slot ID 5) in
default state
[ 6397.873001] xhci_hcd 0000:00:14.0: Not freeing device rings.
[ 6397.873013] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.873057] xhci_hcd 0000:00:14.0: Successful setup address command
[ 6397.873066] xhci_hcd 0000:00:14.0: Op regs DCBAA ptr = 0x00000236cef000
[ 6397.873073] xhci_hcd 0000:00:14.0: Slot ID 5 dcbaa entry
@00000000225b73b8 = 0x0000013efdc000
[ 6397.873083] xhci_hcd 0000:00:14.0: Output Context DMA address =
0x13efdc000
[ 6397.873088] xhci_hcd 0000:00:14.0: Internal device address = 5
[ 6397.890400] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6397.890503] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6397.890743] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6397.890817] usb 3-1: New USB device found, idVendor=2b73,
idProduct=001e, bcdDevice= 1.01
[ 6397.890828] usb 3-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 6397.890835] usb 3-1: Product: DDJ-SR2
[ 6397.890840] usb 3-1: Manufacturer: Pioneer DJ Corporation
[ 6397.891132] xhci_hcd 0000:00:14.0: add ep 0x85, slot id 5, new drop
flags = 0x0, new add flags = 0x800
[ 6397.891165] xhci_hcd 0000:00:14.0: add ep 0x4, slot id 5, new drop flags
= 0x0, new add flags = 0x900
[ 6397.891183] xhci_hcd 0000:00:14.0: add ep 0x87, slot id 5, new drop
flags = 0x0, new add flags = 0x8900
[ 6397.891196] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
00000000298860cb
[ 6397.891210] xhci_hcd 0000:00:14.0: Adding 3 ep ctxs, 4 now active.
[ 6397.891225] xhci_hcd 0000:00:14.0: Recalculating BW for rootport 1
[ 6397.891236] xhci_hcd 0000:00:14.0: Final bandwidth: 42, Limit: 1607,
Reserved: 322, Available: 77 percent
[ 6397.891253] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.891348] xhci_hcd 0000:00:14.0: Successful Endpoint Configure command
[ 6397.891468] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.891493] xhci_hcd 0000:00:14.0: Stopped on No-op or Link TRB for slot
5 ep 10
[ 6397.891522] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.891609] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.891841] xhci_hcd 0000:00:14.0: Stopped on No-op or Link TRB for slot
5 ep 7
[ 6397.891856] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.891923] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.891949] xhci_hcd 0000:00:14.0: Stopped on No-op or Link TRB for slot
5 ep 14
[ 6397.891962] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6397.892364] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6397.892476] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6397.892543] usb 3-1: 0:1: added playback implicit_fb sync_ep 82, iface
0:1
[ 6397.892562] usb 3-1: Creating new data endpoint #1
[ 6397.892568] usb 3-1: Creating new data endpoint #82
[ 6397.892574] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
00000000298860cb
[ 6397.892683] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6397.892706] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
00000000298860cb
[ 6397.892771] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6397.969579] xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping port
polling.
[ 6402.946313] xhci_hcd 0000:00:14.0: Cancel URB 00000000c89bac54, dev 1,
ep 0x0, starting at offset 0x13ef91210
[ 6402.946353] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6402.946371] xhci_hcd 0000:00:14.0: Stopped on Transfer TRB for slot 5 ep
0
[ 6402.946383] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13ef91210 (dma).
[ 6402.946392] xhci_hcd 0000:00:14.0: Set TR Deq ptr 0x13ef91230, cycle 1
[ 6402.946398] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6402.946409] xhci_hcd 0000:00:14.0: Successful Set TR Deq Ptr cmd, deq =
@13ef91230
[ 6402.946417] xhci_hcd 0000:00:14.0: Giveback URB 00000000c89bac54, len =
0, expected = 0, status = -115
[ 6402.947692] hid-generic 0003:2B73:001E.0005: hiddev96,hidraw0: USB HID
v1.11 Device [Pioneer DJ Corporation DDJ-SR2] on usb-0000:00:14.0-1/input3
[ 6424.552616] usb 3-1: Open EP 0x82, iface=0:1, idx=1
[ 6424.552626] usb 3-1: channels=6, rate=44100, format=S24_3LE,
period_bytes=9216, periods=2, implicit_fb=0
[ 6424.552632] usb 3-1: Setting usb interface 0:0 for EP 0x82
[ 6424.552638] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
00000000298860cb
[ 6424.552715] usb 3-1: Setting usb interface 0:1 for EP 0x82
[ 6424.552725] xhci_hcd 0000:00:14.0: add ep 0x1, slot id 5, new drop flags
= 0x0, new add flags = 0x5
[ 6424.552732] xhci_hcd 0000:00:14.0: add ep 0x82, slot id 5, new drop
flags = 0x0, new add flags = 0x25
[ 6424.552736] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
00000000298860cb
[ 6424.552741] xhci_hcd 0000:00:14.0: Adding 2 ep ctxs, 6 now active.
[ 6424.552746] xhci_hcd 0000:00:14.0: Recalculating BW for rootport 1
[ 6424.552750] xhci_hcd 0000:00:14.0: Final bandwidth: 282, Limit: 1607,
Reserved: 322, Available: 62 percent
[ 6424.552757] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6424.552811] xhci_hcd 0000:00:14.0: Successful Endpoint Configure command
[ 6424.552983] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6424.553011] usb 3-1: Setting params for data EP 0x82, pipe 0x10680
[ 6424.553021] usb 3-1: Set up 12 URBS, ret=0
[ 6424.553113] usb 3-1: Open EP 0x1, iface=0:1, idx=0
[ 6424.553117] usb 3-1: channels=4, rate=44100, format=S24_3LE,
period_bytes=6144, periods=2, implicit_fb=1
[ 6424.553122] usb 3-1: Reopened EP 0x82 (count 1)
[ 6424.553126] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6424.553129] usb 3-1: Setting params for data EP 0x1, pipe 0x8600
[ 6424.553138] usb 3-1: Set up 12 URBS, ret=0
[ 6424.553163] usb 3-1: Starting data EP 0x1 (running 0)
[ 6424.553168] usb 3-1: No URB submission due to implicit fb sync
[ 6424.553170] usb 3-1: Starting data EP 0x82 (running 0)
[ 6424.553219] usb 3-1: 12 URBs submitted for EP 0x82
[ 6424.555173] usb 3-1: Starting data EP 0x82 (running 1)
[ 6424.555180] usb 3-1: 0:1 Start Capture PCM
[ 6424.555184] usb 3-1: 0:1 Start Playback PCM
---
[ 6518.662829] xhci_hcd 0000:00:14.0: resume root hub
[ 6518.662849] xhci_hcd 0000:00:14.0: handle_port_status: starting port
polling.
[ 6518.663623] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x206e1,
return 0x10101
[ 6518.663703] xhci_hcd 0000:00:14.0: clear port1 connect change, portsc:
0x6e1
[ 6518.663728] xhci_hcd 0000:00:14.0: Get port status 3-2 read: 0x2a0,
return 0x100
[ 6518.663750] xhci_hcd 0000:00:14.0: Get port status 3-3 read: 0x2a0,
return 0x100
[ 6518.663769] xhci_hcd 0000:00:14.0: Get port status 3-4 read: 0x2a0,
return 0x100
[ 6518.719588] xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping port
polling.
[ 6518.769612] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x6e1,
return 0x101
[ 6518.769668] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6518.769712] xhci_hcd 0000:00:14.0: Adding 1 ep ctx, 1 now active.
[ 6518.769725] xhci_hcd 0000:00:14.0: Slot 6 output ctx = 0x13efdc000 (dma)
[ 6518.769734] xhci_hcd 0000:00:14.0: Slot 6 input ctx = 0x13ec75000 (dma)
[ 6518.769744] xhci_hcd 0000:00:14.0: Set slot id 6 dcbaa entry
00000000d24104f6 to 0x13efdc000
[ 6518.769816] xhci_hcd 0000:00:14.0: set port reset, actual port 3-1
status = 0x791
[ 6518.772897] xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping port
polling.
[ 6518.824991] xhci_hcd 0000:00:14.0: Port change event, 3-1, id 1, portsc:
0x200e03
[ 6518.825012] xhci_hcd 0000:00:14.0: handle_port_status: starting port
polling.
[ 6518.836254] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x200e03,
return 0x100503
[ 6518.836306] xhci_hcd 0000:00:14.0: clear port1 reset change, portsc:
0xe03
[ 6518.892917] usb 3-1: new high-speed USB device number 7 using xhci_hcd
[ 6518.892938] xhci_hcd 0000:00:14.0: Set root hub portnum to 1
[ 6518.892945] xhci_hcd 0000:00:14.0: Set fake root hub portnum to 1
[ 6518.892950] xhci_hcd 0000:00:14.0: udev->tt = 0000000000000000
[ 6518.892956] xhci_hcd 0000:00:14.0: udev->ttport = 0x0
[ 6518.892966] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6518.892999] xhci_hcd 0000:00:14.0: Successful setup context command
[ 6518.893008] xhci_hcd 0000:00:14.0: Op regs DCBAA ptr = 0x00000236cef000
[ 6518.893015] xhci_hcd 0000:00:14.0: Slot ID 6 dcbaa entry
@00000000d24104f6 = 0x0000013efdc000
[ 6518.893023] xhci_hcd 0000:00:14.0: Output Context DMA address =
0x13efdc000
[ 6518.893029] xhci_hcd 0000:00:14.0: Internal device address = 0
[ 6518.893208] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6518.893287] xhci_hcd 0000:00:14.0: set port reset, actual port 3-1
status = 0xf91
[ 6518.948510] xhci_hcd 0000:00:14.0: Port change event, 3-1, id 1, portsc:
0x200e03
[ 6518.948533] xhci_hcd 0000:00:14.0: handle_port_status: starting port
polling.
[ 6518.959642] xhci_hcd 0000:00:14.0: Get port status 3-1 read: 0x200e03,
return 0x100503
[ 6518.959704] xhci_hcd 0000:00:14.0: clear port1 reset change, portsc:
0xe03
[ 6518.969594] xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping port
polling.
[ 6519.016304] xhci_hcd 0000:00:14.0: Resetting device with slot ID 6
[ 6519.016330] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.016351] xhci_hcd 0000:00:14.0: Completed reset device command.
[ 6519.016370] xhci_hcd 0000:00:14.0: Can't reset device (slot ID 6) in
default state
[ 6519.016377] xhci_hcd 0000:00:14.0: Not freeing device rings.
[ 6519.016390] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.016437] xhci_hcd 0000:00:14.0: Successful setup address command
[ 6519.016446] xhci_hcd 0000:00:14.0: Op regs DCBAA ptr = 0x00000236cef000
[ 6519.016454] xhci_hcd 0000:00:14.0: Slot ID 6 dcbaa entry
@00000000d24104f6 = 0x0000013efdc000
[ 6519.016463] xhci_hcd 0000:00:14.0: Output Context DMA address =
0x13efdc000
[ 6519.016469] xhci_hcd 0000:00:14.0: Internal device address = 6
[ 6519.033886] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6519.034170] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6519.034352] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6519.034416] usb 3-1: New USB device found, idVendor=2b73,
idProduct=001e, bcdDevice= 1.01
[ 6519.034427] usb 3-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 6519.034435] usb 3-1: Product: DDJ-SR2
[ 6519.034440] usb 3-1: Manufacturer: Pioneer DJ Corporation
[ 6519.034757] xhci_hcd 0000:00:14.0: add ep 0x85, slot id 6, new drop
flags = 0x0, new add flags = 0x800
[ 6519.034776] xhci_hcd 0000:00:14.0: add ep 0x4, slot id 6, new drop flags
= 0x0, new add flags = 0x900
[ 6519.034790] xhci_hcd 0000:00:14.0: add ep 0x87, slot id 6, new drop
flags = 0x0, new add flags = 0x8900
[ 6519.034799] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
0000000041e6ad6d
[ 6519.034811] xhci_hcd 0000:00:14.0: Adding 3 ep ctxs, 4 now active.
[ 6519.034821] xhci_hcd 0000:00:14.0: Recalculating BW for rootport 1
[ 6519.034828] xhci_hcd 0000:00:14.0: Final bandwidth: 42, Limit: 1607,
Reserved: 322, Available: 77 percent
[ 6519.034842] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.045845] xhci_hcd 0000:00:14.0: Successful Endpoint Configure command
[ 6519.045948] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.045982] xhci_hcd 0000:00:14.0: Stopped on No-op or Link TRB for slot
6 ep 10
[ 6519.046008] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.046083] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.046107] xhci_hcd 0000:00:14.0: Stopped on No-op or Link TRB for slot
6 ep 7
[ 6519.046123] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.046239] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6519.046528] xhci_hcd 0000:00:14.0: Stopped on No-op or Link TRB for slot
6 ep 14
[ 6519.046813] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6524.122938] xhci_hcd 0000:00:14.0: Cancel URB 000000005dc311b3, dev 1,
ep 0x0, starting at offset 0x13ef91170
[ 6524.122971] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6524.122989] xhci_hcd 0000:00:14.0: Stopped on Transfer TRB for slot 6 ep
0
[ 6524.123001] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13ef91170 (dma).
[ 6524.123010] xhci_hcd 0000:00:14.0: Set TR Deq ptr 0x13ef91190, cycle 1
[ 6524.123016] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6524.123028] xhci_hcd 0000:00:14.0: Successful Set TR Deq Ptr cmd, deq =
@13ef91190
[ 6524.123036] xhci_hcd 0000:00:14.0: Giveback URB 000000005dc311b3, len =
0, expected = 0, status = -115
[ 6524.124748] hid-generic 0003:2B73:001E.0006: hiddev96,hidraw0: USB HID
v1.11 Device [Pioneer DJ Corporation DDJ-SR2] on usb-0000:00:14.0-1/input3
[ 6524.140705] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6524.140856] xhci_hcd 0000:00:14.0: Waiting for status stage event
[ 6524.140936] usb 3-1: 0:1: added playback implicit_fb sync_ep 82, iface
0:1
[ 6524.140951] usb 3-1: Creating new data endpoint #1
[ 6524.140954] usb 3-1: Creating new data endpoint #82
[ 6524.140958] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
0000000041e6ad6d
[ 6524.141095] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6524.141110] usb 3-1: 0:1: found sync_ep=0x82, iface=0, alt=1,
implicit_fb=0
[ 6524.141118] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
0000000041e6ad6d
[ 6524.141274] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6524.141683] usbcore: registered new interface driver snd-usb-audio
[ 6530.912038] usb 3-1: Open EP 0x82, iface=0:1, idx=1
[ 6530.912047] usb 3-1: channels=6, rate=44100, format=S24_3LE,
period_bytes=9216, periods=2, implicit_fb=0
[ 6530.912052] usb 3-1: Reopened EP 0x82 (count 1)
[ 6530.912056] usb 3-1: Setting usb interface 0:0 for EP 0x82
[ 6530.912062] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
0000000041e6ad6d
[ 6530.912125] usb 3-1: Setting usb interface 0:1 for EP 0x82
[ 6530.912134] xhci_hcd 0000:00:14.0: add ep 0x1, slot id 6, new drop flags
= 0x0, new add flags = 0x5
[ 6530.912141] xhci_hcd 0000:00:14.0: add ep 0x82, slot id 6, new drop
flags = 0x0, new add flags = 0x25
[ 6530.912146] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
0000000041e6ad6d
[ 6530.912151] xhci_hcd 0000:00:14.0: Adding 2 ep ctxs, 6 now active.
[ 6530.912156] xhci_hcd 0000:00:14.0: Recalculating BW for rootport 1
[ 6530.912160] xhci_hcd 0000:00:14.0: Final bandwidth: 282, Limit: 1607,
Reserved: 322, Available: 62 percent
[ 6530.912165] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6530.912221] xhci_hcd 0000:00:14.0: Successful Endpoint Configure command
[ 6530.912412] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6530.912419] usb 3-1: Setting params for data EP 0x82, pipe 0x10780
[ 6530.912428] usb 3-1: Set up 12 URBS, ret=0
[ 6530.912525] usb 3-1: Open EP 0x1, iface=0:1, idx=0
[ 6530.912530] usb 3-1: channels=4, rate=44100, format=S24_3LE,
period_bytes=6144, periods=2, implicit_fb=1
[ 6530.912535] usb 3-1: Reopened EP 0x82 (count 2)
[ 6530.912538] usb 3-1: 0:1 Set sample rate 44100, clock 0
[ 6530.912542] usb 3-1: Setting params for data EP 0x1, pipe 0x8700
[ 6530.912549] usb 3-1: Set up 12 URBS, ret=0
[ 6530.912575] usb 3-1: Starting data EP 0x1 (running 0)
[ 6530.912579] usb 3-1: No URB submission due to implicit fb sync
[ 6530.912582] usb 3-1: Starting data EP 0x82 (running 0)
[ 6530.912623] usb 3-1: 12 URBs submitted for EP 0x82
[ 6530.915746] usb 3-1: Starting data EP 0x82 (running 1)
[ 6530.915760] usb 3-1: Starting data EP 0x82 (running 2)
[ 6530.915766] usb 3-1: 0:1 Start Capture PCM
[ 6530.915772] usb 3-1: 0:1 Start Playback PCM
[ 6548.340701] usb 3-1: Stopping data EP 0x82 (running 3)
[ 6548.340709] usb 3-1: Stopping data EP 0x82 (running 2)
[ 6548.340713] usb 3-1: 0:1 Stop Capture PCM
[ 6548.340717] usb 3-1: Stopping data EP 0x82 (running 1)
[ 6548.340724] xhci_hcd 0000:00:14.0: Cancel URB 0000000017eaed8f, dev 1,
ep 0x82, starting at offset 0x13eef0b40
[ 6548.340731] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6548.340735] xhci_hcd 0000:00:14.0: Cancel URB 00000000d1c36d1d, dev 1,
ep 0x82, starting at offset 0x13eef0b50
[ 6548.340741] xhci_hcd 0000:00:14.0: Stopped on Transfer TRB for slot 6 ep
4
[ 6548.340746] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b40 (dma).
[ 6548.340750] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b50 (dma).
[ 6548.340758] xhci_hcd 0000:00:14.0: Cancel URB 000000007dcb7021, dev 1,
ep 0x82, starting at offset 0x13eef0b60
[ 6548.340762] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6548.340766] xhci_hcd 0000:00:14.0: Cancel URB 00000000b381540e, dev 1,
ep 0x82, starting at offset 0x13eef0b70
[ 6548.340769] xhci_hcd 0000:00:14.0: Cancel URB 00000000059964b3, dev 1,
ep 0x82, starting at offset 0x13eef0b80
[ 6548.340773] xhci_hcd 0000:00:14.0: Cancel URB 0000000009d6cac7, dev 1,
ep 0x82, starting at offset 0x13eef0b90
[ 6548.340777] xhci_hcd 0000:00:14.0: Cancel URB 000000008fc1dbd6, dev 1,
ep 0x82, starting at offset 0x13eef0ba0
[ 6548.340783] xhci_hcd 0000:00:14.0: Stopped on Transfer TRB for slot 6 ep
4
[ 6548.340786] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b60 (dma).
[ 6548.340789] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b70 (dma).
[ 6548.340792] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b80 (dma).
[ 6548.340795] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b90 (dma).
[ 6548.340798] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0ba0 (dma).
[ 6548.340806] xhci_hcd 0000:00:14.0: Cancel URB 00000000dd5ca99e, dev 1,
ep 0x82, starting at offset 0x13eef0bb0
[ 6548.340810] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6548.340814] xhci_hcd 0000:00:14.0: Cancel URB 000000003c889fa7, dev 1,
ep 0x82, starting at offset 0x13eef0bc0
[ 6548.340818] xhci_hcd 0000:00:14.0: Cancel URB 000000005c402de4, dev 1,
ep 0x82, starting at offset 0x13eef0b10
[ 6548.340823] xhci_hcd 0000:00:14.0: Stopped on Transfer TRB for slot 6 ep
4
[ 6548.340826] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0bb0 (dma).
[ 6548.340829] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0bc0 (dma).
[ 6548.340832] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b10 (dma).
[ 6548.340836] xhci_hcd 0000:00:14.0: Set TR Deq ptr 0x13eef0b20, cycle 1
[ 6548.340839] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6548.340848] xhci_hcd 0000:00:14.0: Cancel URB 0000000012679da4, dev 1,
ep 0x82, starting at offset 0x13eef0b20
[ 6548.340851] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6548.340855] xhci_hcd 0000:00:14.0: Cancel URB 00000000353acb81, dev 1,
ep 0x82, starting at offset 0x13eef0b30
[ 6548.340860] usb 3-1: Stopping data EP 0x1 (running 1)
[ 6548.340861] xhci_hcd 0000:00:14.0: Successful Set TR Deq Ptr cmd, deq =
@13eef0b20
[ 6548.340864] usb 3-1: 0:1 Stop Playback PCM
[ 6548.340866] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b20 (dma).
[ 6548.340869] xhci_hcd 0000:00:14.0: Removing canceled TD starting at
0x13eef0b30 (dma).
[ 6548.340872] xhci_hcd 0000:00:14.0: Set TR Deq ptr 0x13eef0b30, cycle 1
[ 6548.340875] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6548.340901] xhci_hcd 0000:00:14.0: Successful Set TR Deq Ptr cmd, deq =
@13eef0b30
[ 6548.350377] usb 3-1: Closing EP 0x82 (count 3)
[ 6548.350384] usb 3-1: Closing EP 0x82 (count 2)
[ 6548.350396] usb 3-1: Closing EP 0x1 (count 1)
[ 6548.350398] usb 3-1: EP 0x1 closed
[ 6548.350400] usb 3-1: Closing EP 0x82 (count 1)
[ 6548.350401] usb 3-1: Setting usb interface 0:0 for EP 0x82
[ 6548.350406] xhci_hcd 0000:00:14.0: xhci_drop_endpoint called for udev
0000000041e6ad6d
[ 6548.350423] xhci_hcd 0000:00:14.0: drop ep 0x1, slot id 6, new drop
flags = 0x4, new add flags = 0x0
[ 6548.350426] xhci_hcd 0000:00:14.0: xhci_drop_endpoint called for udev
0000000041e6ad6d
[ 6548.350435] xhci_hcd 0000:00:14.0: drop ep 0x82, slot id 6, new drop
flags = 0x24, new add flags = 0x0
[ 6548.350438] xhci_hcd 0000:00:14.0: xhci_check_bandwidth called for udev
0000000041e6ad6d
[ 6548.350442] xhci_hcd 0000:00:14.0: Adding 0 ep ctxs, 6 now active.
[ 6548.350445] xhci_hcd 0000:00:14.0: Recalculating BW for rootport 1
[ 6548.350447] xhci_hcd 0000:00:14.0: Final bandwidth: 42, Limit: 1607,
Reserved: 322, Available: 77 percent
[ 6548.350451] xhci_hcd 0000:00:14.0: // Ding dong!
[ 6548.350509] xhci_hcd 0000:00:14.0: Successful Endpoint Configure command
[ 6548.350512] xhci_hcd 0000:00:14.0: Removing 2 dropped ep ctxs, 4 now
active.
[ 6548.350644] usb 3-1: EP 0x82 closed
---
Bus 003 Device 007: ID 2b73:001e Pioneer DJ Corporation DDJ-SR2
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2b73
idProduct 0x001e
bcdDevice 1.01
iManufacturer 1 Pioneer DJ Corporation
iProduct 2 DDJ-SR2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x00a2
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 3
bRefresh 0
bSynchAddress 0
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 3
bRefresh 0
bSynchAddress 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 0x0009
bInCollection 1
baInterfaceNr(0) 2
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 1 Audio
bInterfaceSubClass 3 MIDI Streaming
bInterfaceProtocol 0
iInterface 0
MIDIStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 0x0041
MIDIStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (MIDI_IN_JACK)
bJackType 1 Embedded
bJackID 3
iJack 0
MIDIStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (MIDI_IN_JACK)
bJackType 2 External
bJackID 1
iJack 0
MIDIStreaming Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (MIDI_OUT_JACK)
bJackType 2 External
bJackID 4
bNrInputPins 1
baSourceID( 0) 3
BaSourcePin( 0) 1
iJack 0
MIDIStreaming Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (MIDI_OUT_JACK)
bJackType 1 Embedded
bJackID 2
bNrInputPins 1
baSourceID( 0) 1
BaSourcePin( 0) 1
iJack 0
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
bRefresh 0
bSynchAddress 0
MIDIStreaming Endpoint Descriptor:
bLength 5
bDescriptorType 37
bDescriptorSubtype 1 (GENERAL)
bNumEmbMIDIJack 1
baAssocJackID( 0) 2
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
bRefresh 0
bSynchAddress 0
MIDIStreaming Endpoint Descriptor:
bLength 5
bDescriptorType 37
bDescriptorSubtype 1 (GENERAL)
bNumEmbMIDIJack 1
baAssocJackID( 0) 3
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 52
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 4
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x0001
Self Powered
