Dne 05. 02. 24 v 15:35 Pavel Hofman napsal(a):
Dne 05. 02. 24 v 14:43 Pavel Hofman napsal(a):
Hi Minas,
I am having issues with dwc2 gadget on RK3308 (Rock Pi S). Kernel 6.6.2.
When lightly loading EP OUT with UAC2, EP OUT works OK. When
increasing the packet size (960 bytes in the iso packet), the data
delivery stops completely. Method u_audio.c:u_audio_iso_complete stops
being called, it's like as if the incoming stream reception got stuck.
Only the function f_uac2 is used on the gadget.
Debug log from gadget.c + u_audio.c (logging all calls of
u_audio_iso_complete including !req->status) is attached. Starts of
playback on the host are marked with this logs in the dump:
g_audio gadget.0: start capture with rate 192000
root@rock-pi-s:/sys/kernel/debug/usb/ff400000.usb# cat hw_params
op_mode : 0
arch : 2
dma_desc_enable : 1
enable_dynamic_fifo : 1
en_multiple_tx_fifo : 1
rx_fifo_size : 1024
host_nperio_tx_fifo_size : 0
dev_nperio_tx_fifo_size : 16
host_perio_tx_fifo_size : 0
nperio_tx_q_depth : 4
host_perio_tx_q_depth : 4
dev_token_q_depth : 8
max_transfer_size : 524287
max_packet_count : 1023
host_channels : 9
hs_phy_type : 1
fs_phy_type : 0
i2c_enable : 0
num_dev_ep : 9
num_dev_perio_in_ep : 0
total_fifo_size : 972
power_optimized : 1
utmi_phy_data_width : 1
snpsid : 0x4f54310a
dev_ep_dirs : 0x6664
root@rock-pi-s:/sys/kernel/debug/usb/ff400000.usb# cat params
otg_caps.hnp_support : 0
otg_caps.srp_support : 0
otg_caps.otg_rev : 0
dma_desc_enable : 0
dma_desc_fs_enable : 0
speed : 0
enable_dynamic_fifo : 1
en_multiple_tx_fifo : 1
host_rx_fifo_size : 525
host_nperio_tx_fifo_size : 128
host_perio_tx_fifo_size : 256
max_transfer_size : 524287
max_packet_count : 1023
host_channels : 0
phy_type : 1
phy_utmi_width : 16
phy_ulpi_ddr : 0
phy_ulpi_ext_vbus : 0
i2c_enable : 0
ipg_isoc_en : 0
ulpi_fs_ls : 0
host_support_fs_ls_low_power : 0
host_ls_low_power_phy_clk : 0
activate_stm_fs_transceiver : 0
activate_stm_id_vb_detection : 0
ts_dline : 0
reload_ctl : 1
ahbcfg : 0xe
uframe_sched : 1
external_id_pin_ctl : 0
power_down : 0
lpm : 0
lpm_clock_gating : 0
besl : 0
hird_threshold_en : 0
hird_threshold : 4
service_interval : 0
host_dma : 0
g_dma : 1
g_dma_desc : 1
g_rx_fifo_size : 310
g_np_tx_fifo_size : 16
g_tx_fifo_size[0] : 0
g_tx_fifo_size[1] : 256
g_tx_fifo_size[2] : 128
g_tx_fifo_size[3] : 128
g_tx_fifo_size[4] : 64
g_tx_fifo_size[5] : 32
g_tx_fifo_size[6] : 16
g_tx_fifo_size[7] : 0
g_tx_fifo_size[8] : 0
g_tx_fifo_size[9] : 0
g_tx_fifo_size[10] : 0
g_tx_fifo_size[11] : 0
g_tx_fifo_size[12] : 0
g_tx_fifo_size[13] : 0
g_tx_fifo_size[14] : 0
g_tx_fifo_size[15] : 0
root@rock-pi-s:/sys/kernel/debug/usb/ff400000.usb# cat regdump
GOTGCTL = 0x000d0000
GOTGINT = 0x00000000
GAHBCFG = 0x0000002f
GUSBCFG = 0x4000140f
GRSTCTL = 0x40000000
GINTSTS = 0x0438c0ba
GINTMSK = 0xd88c3c44
GRXSTSR = 0x51643c02
GRXFSIZ = 0x00000136
GNPTXFSIZ = 0x00100136
GNPTXSTS = 0x00080010
GI2CCTL = 0x00000000
GPVNDCTL = 0x00000000
GGPIO = 0x00000000
GUID = 0x32000001
GSNPSID = 0x4f54310a
GHWCFG1 = 0x00006664
GHWCFG2 = 0x228e2450
GHWCFG3 = 0x03cc90e8
GHWCFG4 = 0xdbf04030
GLPMCFG = 0x00000000
GPWRDN = 0x00600010
GDFIFOCFG = 0x03b603cc
ADPCTL = 0x00000000
HPTXFSIZ = 0x00000000
DPTXFSIZN(1) = 0x01000146
DPTXFSIZN(2) = 0x00800246
DPTXFSIZN(3) = 0x008002c6
DPTXFSIZN(4) = 0x00400346
DPTXFSIZN(5) = 0x00200386
DPTXFSIZN(6) = 0x001003a6
DPTXFSIZN(7) = 0x00200386
DPTXFSIZN(8) = 0x001003a6
DPTXFSIZN(9) = 0x01000146
DPTXFSIZN(10) = 0x00800246
DPTXFSIZN(11) = 0x008002c6
DPTXFSIZN(12) = 0x00400346
DPTXFSIZN(13) = 0x00200386
DPTXFSIZN(14) = 0x001003a6
DPTXFSIZN(15) = 0x00200386
DCFG = 0x008402f0
DCTL = 0x00000000
DSTS = 0x001ef900
DIEPMSK = 0x0000220f
DOEPMSK = 0x0000023f
DAINT = 0x02140000
DAINTMSK = 0x0005000b
DTKNQR1 = 0x00000000
DTKNQR2 = 0x00000000
DTKNQR3 = 0x0c100020
DTKNQR4 = 0x00000000
DVBUSDIS = 0x00000b8f
DVBUSPULSE = 0x000002c6
DIEPCTL(0) = 0x00028000
DIEPCTL(1) = 0x018c8006
DIEPCTL(2) = 0x00000400
DIEPCTL(3) = 0x01448004
DIEPCTL(4) = 0x00000400
DIEPCTL(5) = 0x004603e8
DIEPCTL(6) = 0x00000400
DIEPCTL(7) = 0x00000400
DIEPCTL(8) = 0x00000400
DIEPCTL(9) = 0x00000400
DIEPCTL(10) = 0x00000400
DIEPCTL(11) = 0x00000400
DIEPCTL(12) = 0x00000400
DIEPCTL(13) = 0x00000400
DIEPCTL(14) = 0x00000400
DIEPCTL(15) = 0x00000400
DOEPCTL(0) = 0x80028000
DOEPCTL(1) = 0x00000400
DOEPCTL(2) = 0x800483e8
DOEPCTL(3) = 0x00000400
DOEPCTL(4) = 0x00000400
DOEPCTL(5) = 0x00000400
DOEPCTL(6) = 0x00000400
DOEPCTL(7) = 0x00000400
DOEPCTL(8) = 0x00000400
DOEPCTL(9) = 0x00000400
DOEPCTL(10) = 0x00000400
DOEPCTL(11) = 0x00000400
DOEPCTL(12) = 0x00000400
DOEPCTL(13) = 0x00000400
DOEPCTL(14) = 0x00000400
DOEPCTL(15) = 0x00000400
DIEPINT(0) = 0x00000090
DIEPINT(1) = 0x00000090
DIEPINT(2) = 0x000002a0
DIEPINT(3) = 0x00000090
DIEPINT(4) = 0x000002a0
DIEPINT(5) = 0x000000c0
DIEPINT(6) = 0x000002a0
DIEPINT(7) = 0x00000080
DIEPINT(8) = 0x00000080
DIEPINT(9) = 0x00000080
DIEPINT(10) = 0x000002a0
DIEPINT(11) = 0x000002a0
DIEPINT(12) = 0x000002a0
DIEPINT(13) = 0x000002a0
DIEPINT(14) = 0x000002a0
DIEPINT(15) = 0x000002a0
DOEPINT(0) = 0x00002000
DOEPINT(1) = 0x00000000
DOEPINT(2) = 0x00002010
DOEPINT(3) = 0x00000000
DOEPINT(4) = 0x00000020
DOEPINT(5) = 0x00000000
DOEPINT(6) = 0x00000000
DOEPINT(7) = 0x00000000
DOEPINT(8) = 0x00000000
DOEPINT(9) = 0x00000220
DOEPINT(10) = 0x00000000
DOEPINT(11) = 0x00000000
DOEPINT(12) = 0x00000000
DOEPINT(13) = 0x00000000
DOEPINT(14) = 0x00000000
DOEPINT(15) = 0x00000000
DIEPTSIZ(0) = 0x00080052
DIEPTSIZ(1) = 0x00000000
DIEPTSIZ(2) = 0x00000000
DIEPTSIZ(3) = 0x11d81ef7
DIEPTSIZ(4) = 0x00000000
DIEPTSIZ(5) = 0x00000000
DIEPTSIZ(6) = 0x00000000
DIEPTSIZ(7) = 0x00000000
DIEPTSIZ(8) = 0x00000000
DIEPTSIZ(9) = 0x00000000
DIEPTSIZ(10) = 0x00000000
DIEPTSIZ(11) = 0x00000000
DIEPTSIZ(12) = 0x00000000
DIEPTSIZ(13) = 0x00000000
DIEPTSIZ(14) = 0x00000000
DIEPTSIZ(15) = 0x00000000
DOEPTSIZ(0) = 0x2000005e
DOEPTSIZ(1) = 0x00000000
DOEPTSIZ(2) = 0x1f27b8c0
DOEPTSIZ(3) = 0x00000000
DOEPTSIZ(4) = 0x00000000
DOEPTSIZ(5) = 0x00000000
DOEPTSIZ(6) = 0x00000000
DOEPTSIZ(7) = 0x00000000
DOEPTSIZ(8) = 0x00000000
DOEPTSIZ(9) = 0x00000000
DOEPTSIZ(10) = 0x00000000
DOEPTSIZ(11) = 0x00000000
DOEPTSIZ(12) = 0x00000000
DOEPTSIZ(13) = 0x00000000
DOEPTSIZ(14) = 0x00000000
DOEPTSIZ(15) = 0x00000000
DIEPDMA(0) = 0x0e693000
DIEPDMA(1) = 0x86711010
DIEPDMA(2) = 0x92b8b5a4
DIEPDMA(3) = 0x1ba02008
DIEPDMA(4) = 0x92b8b5a4
DIEPDMA(5) = 0x2fae0710
DIEPDMA(6) = 0x92b8b5a4
DIEPDMA(7) = 0x43c7ba7f
DIEPDMA(8) = 0x0cc64000
DIEPDMA(9) = 0x57447266
DIEPDMA(10) = 0x92b8b5a4
DIEPDMA(11) = 0x92b8b5a4
DIEPDMA(12) = 0x92b8b5a4
DIEPDMA(13) = 0x92b8b5a4
DIEPDMA(14) = 0x92b8b5a4
DIEPDMA(15) = 0x92b8b5a4
DOEPDMA(0) = 0x1ba01000
DOEPDMA(1) = 0xa8800c26
DOEPDMA(2) = 0x1ba01008
DOEPDMA(3) = 0xa8800c26
DOEPDMA(4) = 0x6db46af8
DOEPDMA(5) = 0xa8800c26
DOEPDMA(6) = 0x1291dfd8
DOEPDMA(7) = 0xa8800c26
DOEPDMA(8) = 0x82d9ef90
DOEPDMA(9) = 0x0309d816
DOEPDMA(10) = 0xa8800c26
DOEPDMA(11) = 0xa8800c26
DOEPDMA(12) = 0xa8800c26
DOEPDMA(13) = 0xa8800c26
DOEPDMA(14) = 0xa8800c26
DOEPDMA(15) = 0xa8800c26
DTXFSTS(0) = 0x00000010
DTXFSTS(1) = 0x00000010
DTXFSTS(2) = 0x00000010
DTXFSTS(3) = 0x00000020
DTXFSTS(4) = 0x00000010
DTXFSTS(5) = 0x00000100
DTXFSTS(6) = 0x00000010
DTXFSTS(7) = 0x00000010
DTXFSTS(8) = 0x00000010
DTXFSTS(9) = 0x00000010
DTXFSTS(10) = 0x00000010
DTXFSTS(11) = 0x00000010hofman
DTXFSTS(12) = 0x00000010
DTXFSTS(13) = 0x00000010
DTXFSTS(14) = 0x00000010
DTXFSTS(15) = 0x00000010
PCGCTL = 0x00000000
HCFG = 0x008402f0
HFIR = 0x00000b8f
HFNUM = 0x0b1803df
HPTXSTS = 0x00080100
HAINT = 0x00000002
HAINTMSK = 0x00000007
HFLBADDR = 0x00000000
HPRT0 = 0x00000000
HCCHAR(0) = 0x018c8006
HCCHAR(1) = 0x00000400
HCCHAR(2) = 0x800483e8
HCCHAR(3) = 0x00000400
HCCHAR(4) = 0x00000400
HCCHAR(5) = 0x00000400
HCCHAR(6) = 0x00000400
HCCHAR(7) = 0x00000400
HCCHAR(8) = 0x00000400
HCCHAR(9) = 0x00000400
HCCHAR(10) = 0x00000400
HCCHAR(11) = 0x00000400
HCCHAR(12) = 0x00000400
HCCHAR(13) = 0x00000400
HCCHAR(14) = 0x00000400
HCCHAR(15) = 0x00000400
HCSPLT(0) = 0x00000000
HCSPLT(1) = 0x00000000
HCSPLT(2) = 0x00000000
HCSPLT(3) = 0x00000000
HCSPLT(4) = 0x00000000
HCSPLT(5) = 0x00000000
HCSPLT(6) = 0x00000000
HCSPLT(7) = 0x00000000
HCSPLT(8) = 0x00000000
HCSPLT(9) = 0x00000000
HCSPLT(10) = 0x00000000
HCSPLT(11) = 0x00000000
HCSPLT(12) = 0x00000000
HCSPLT(13) = 0x00000000
HCSPLT(14) = 0x00000000
HCSPLT(15) = 0x00000000
HCINT(0) = 0x00000010
HCINT(1) = 0x00000000
HCINT(2) = 0x00002010
HCINT(3) = 0x00000000
HCINT(4) = 0x00000020
HCINT(5) = 0x00000000
HCINT(6) = 0x00000000
HCINT(7) = 0x00000000
HCINT(8) = 0x00000000
HCINT(9) = 0x00000220
HCINT(10) = 0x00000000
HCINT(11) = 0x00000000
HCINT(12) = 0x00000000
HCINT(13) = 0x00000000
HCINT(14) = 0x00000000
HCINT(15) = 0x00000000
HCINTMSK(0) = 0x0000020f
HCINTMSK(1) = 0x00000000
HCINTMSK(2) = 0x00000000
HCINTMSK(3) = 0x00000000
HCINTMSK(4) = 0x00000000
HCINTMSK(5) = 0x00000000
HCINTMSK(6) = 0x00000000
HCINTMSK(7) = 0x00000000
HCINTMSK(8) = 0x00000000
HCINTMSK(9) = 0x00000000
HCINTMSK(10) = 0x00000000
HCINTMSK(11) = 0x00000000
HCINTMSK(12) = 0x00000000
HCINTMSK(13) = 0x00000000
HCINTMSK(14) = 0x00000000
HCINTMSK(15) = 0x00000000
HCTSIZ(0) = 0x00000000
HCTSIZ(1) = 0x00000000
HCTSIZ(2) = 0x1f27b8c0
HCTSIZ(3) = 0x00000000
HCTSIZ(4) = 0x00000000
HCTSIZ(5) = 0x00000000
HCTSIZ(6) = 0x00000000
HCTSIZ(7) = 0x00000000
HCTSIZ(8) = 0x00000000
HCTSIZ(9) = 0x00000000
HCTSIZ(10) = 0x00000000
HCTSIZ(11) = 0x00000000
HCTSIZ(12) = 0x00000000
HCTSIZ(13) = 0x00000000
HCTSIZ(14) = 0x00000000
HCTSIZ(15) = 0x00000000
HCDMA(0) = 0x1ba01000
HCDMA(1) = 0xa8800c26
HCDMA(2) = 0x1ba01008
HCDMA(3) = 0xa8800c26
HCDMA(4) = 0x6db46af8
HCDMA(5) = 0xa8800c26
HCDMA(6) = 0x1291dfd8
HCDMA(7) = 0xa8800c26
HCDMA(8) = 0x82d9ef90
HCDMA(9) = 0x0309d816
HCDMA(10) = 0xa8800c26
HCDMA(11) = 0xa8800c26
HCDMA(12) = 0xa8800c26
HCDMA(13) = 0xa8800c26
HCDMA(14) = 0xa8800c26
HCDMA(15) = 0xa8800c26
HCDMAB(0) = 0x069e9ff0
HCDMAB(1) = 0xa8800c26
HCDMAB(2) = 0x05eaf3c0
HCDMAB(3) = 0xa8800c26
HCDMAB(4) = 0x1f0d193f
HCDMAB(5) = 0xa8800c26
HCDMAB(6) = 0x7f72548c
HCDMAB(7) = 0xa8800c26
HCDMAB(8) = 0x7795e924
HCDMAB(9) = 0xc36c019a
HCDMAB(10) = 0xa8800c26
HCDMAB(11) = 0xa8800c26
HCDMAB(12) = 0xa8800c26
HCDMAB(13) = 0xa8800c26
HCDMAB(14) = 0xa8800c26
HCDMAB(15) = 0xa8800c26
It really looks like some DMA performance issue. Stream 980 bytes/ 250us
(bInterval=2) is bitperfect, no dropped packets. While 24 bytes/125us
(bInterval=1) gets stuck. IIUC the DMA is not capable of copying packets
every 125us. Please is there any chance to tweak the performance to
handle the 125us packets reliably?
I tried increasing f_uac2 req_number/UAC2_DEF_REQ_NUM from 2 to 8 and
streaming seems to run stable at 125us microframes now (in both
directions simultaneously). Please is there any other gadget tweak which
could potentially reduce the risk of dropped packets? Something like
using plain DMA instead of desc DMA (no idea :-) )...
Thanks a lot for your expert opinion.
