cat /sys/kernel/debug/dynamic_debug/control | grep rtl28xxu.c
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1791
[dvb_usb_rtl28xxu]rtl2832u_rc_query =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1694
[dvb_usb_rtl28xxu]rtl2831u_rc_query =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1616
[dvb_usb_rtl28xxu]rtl28xxu_frontend_ctrl =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1592
[dvb_usb_rtl28xxu]rtl28xxu_frontend_ctrl =_ "fe=%d onoff=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1570
[dvb_usb_rtl28xxu]rtl2832u_power_ctrl =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1520
[dvb_usb_rtl28xxu]rtl2832u_power_ctrl =_ "onoff=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1512
[dvb_usb_rtl28xxu]rtl2831u_power_ctrl =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1490
[dvb_usb_rtl28xxu]rtl2831u_power_ctrl =_ "WR SYS0=%02x
GPIO_OUT_VAL=%02x\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1471
[dvb_usb_rtl28xxu]rtl2831u_power_ctrl =_ "RD SYS0=%02x
GPIO_OUT_VAL=%02x\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1459
[dvb_usb_rtl28xxu]rtl2831u_power_ctrl =_ "onoff=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1450
[dvb_usb_rtl28xxu]rtl28xxu_init =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1425
[dvb_usb_rtl28xxu]rtl28xxu_init =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1403
[dvb_usb_rtl28xxu]rtl28xxu_tuner_detach =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1382
[dvb_usb_rtl28xxu]rtl2832u_tuner_attach =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1377
[dvb_usb_rtl28xxu]rtl2832u_tuner_attach =_ "no SDR for tuner=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1187
[dvb_usb_rtl28xxu]rtl2832u_tuner_attach =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1152
[dvb_usb_rtl28xxu]rtl2831u_tuner_attach =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1122
[dvb_usb_rtl28xxu]rtl2831u_tuner_attach =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1070
[dvb_usb_rtl28xxu]rtl28xxu_frontend_detach =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1042
[dvb_usb_rtl28xxu]rtl2832u_frontend_attach =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:894
[dvb_usb_rtl28xxu]rtl2832u_frontend_attach =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:869
[dvb_usb_rtl28xxu]rtl2832u_frontend_callback =_ "component=%d cmd=%d
arg=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:842
[dvb_usb_rtl28xxu]rtl2832u_tua9001_tuner_callback =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:809
[dvb_usb_rtl28xxu]rtl2832u_tua9001_tuner_callback =_ "cmd=%d
arg=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:799
[dvb_usb_rtl28xxu]rtl2832u_fc0012_tuner_callback =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:774
[dvb_usb_rtl28xxu]rtl2832u_fc0012_tuner_callback =_ "cmd=%d
arg=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:729
[dvb_usb_rtl28xxu]rtl2831u_frontend_attach =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:686
[dvb_usb_rtl28xxu]rtl2831u_frontend_attach =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:648
[dvb_usb_rtl28xxu]rtl28xxu_identify_state =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:640
[dvb_usb_rtl28xxu]rtl28xxu_identify_state =_ "chip_id=%u\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:620
[dvb_usb_rtl28xxu]rtl28xxu_identify_state =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:598
[dvb_usb_rtl28xxu]rtl2832u_read_config =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:584
[dvb_usb_rtl28xxu]rtl2832u_read_config =_ "Si2168 found\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:575
[dvb_usb_rtl28xxu]rtl2832u_read_config =_ "CXD2837ER found\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:568
[dvb_usb_rtl28xxu]rtl2832u_read_config =_ "MN88473 found\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:561
[dvb_usb_rtl28xxu]rtl2832u_read_config =_ "MN88472 found\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:527
[dvb_usb_rtl28xxu]rtl2832u_read_config =_ "tuner=%s\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:378
[dvb_usb_rtl28xxu]rtl2832u_read_config =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:346
[dvb_usb_rtl28xxu]rtl2831u_read_config =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:342
[dvb_usb_rtl28xxu]rtl2831u_read_config =_ "tuner=%s\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:280
[dvb_usb_rtl28xxu]rtl2831u_read_config =_ "\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:59
[dvb_usb_rtl28xxu]rtl28xxu_ctrl_msg =_ "failed=%d\012"
drivers/media/usb/dvb-usb-v2/rtl28xxu.c:45
[dvb_usb_rtl28xxu]rtl28xxu_ctrl_msg =_ "%s: %02x %02x %02x %02x %02x
%02x %02x %02x %s %*ph\012"

On Sun, May 30, 2021 at 4:54 PM Johan Hovold [off-list ref] wrote:

On Sun, May 30, 2021 at 03:23:36PM +0300, Eero Lehtinen wrote:

quoted

Hi,

I tested Johans latest patch and my dvb-t stick can find the channel
list but not to tune to them. It uses the mxl5005s driver again with
repeating mxl5005s I2C write failed messages:

[   23.276076] mxl5005s I2C reset failed
[   23.296082] mxl5005s I2C write failed
[   23.316041] mxl5005s I2C write failed
[   23.336061] mxl5005s I2C write failed
[   23.336100] usb 1-1: Frontend requested software zigzag, but didn't
set the frequency step size
[   23.356096] mxl5005s I2C reset failed
[   23.376226] mxl5005s I2C write failed
[   23.396084] mxl5005s I2C write failed
[   23.416082] mxl5005s I2C write failed

It was just an instrumentation patch to gather more information. Can you
post the logs from when probing/using the device with that patch in
place?

Specifically, look for the "rtl28xxu_identify_state" entries, but please
include the full log in case there are more hints in there.

Also, please keep me and Alan on CC (along with the list) so that we get
your replies directly. The list can be a bit slow at forwarding at
times.

Johan