Hi Li
On 2018-11-04 23:19, Jun Li wrote:
Hi Angus
-----Original Message-----
From: Angus Ainslie <angus.ainslie@xxxxxxx>
Sent: 2018年11月1日 21:53
To: Jun Li <jun.li@xxxxxxx>
Subject: USB Type C ptn5110
Hi Li,
We have a custom PCB that has a PTN5110 on it. The board can power
from the
USB C no problem but we are starting to look into the data modes and
roles
switching.
When I plug it into a host PC the host doesn't not recognize any
device attached. I
don't have anything setup on the target as far as the gadgetfs so I
assume that is
the issue there.
Also we would like the port to work in host mode. When we plug and
unplug
devices ( Type C hub and Type C HDMI connector ) I was expecting
activity and a
role switch on the port but we only get VBUS on/off events. There's a
log below
and I'll attach the page from our schematic, I can send additional
pages if needed.
What usb driver are you using? Is there a sync mechanism between typec
driver
and your usb driver?
Its attached to an imx8mq so the phy driver is imx8mq-usb-phy and the
USB driver is imx8mq-dwc3.
What type of sync mechanism needs to be in place ?
What kernel version you are using, why SNK_ATTACH_WAIT can come to
PORT_RESET state?
it is the 4.18 kernel with this patch set applied
[PATCH v8 00/14] staging: typec: tcpci: move out of staging
https://www.spinics.net/lists/linux-usb/msg170444.html
This is tcpm code I see:
case SNK_ATTACH_WAIT:
if ((port->cc1 == TYPEC_CC_OPEN &&
port->cc2 != TYPEC_CC_OPEN) ||
(port->cc1 != TYPEC_CC_OPEN &&
port->cc2 == TYPEC_CC_OPEN))
tcpm_set_state(port, SNK_DEBOUNCED,
PD_T_CC_DEBOUNCE);
else if (tcpm_port_is_disconnected(port))
tcpm_set_state(port, SNK_UNATTACHED,
PD_T_PD_DEBOUNCE);
break;
That code is in our tree
https://source.puri.sm/Librem5/linux-emcraft/blob/imx8-4.18-wip/drivers/usb/typec/tcpm.c#L2933
You can cc to linux-usb mail list for more help.
Thanks
Angus
Li Jun
Any help would be appreciated.
Thanks
Angus
[ 9.995334] Setting voltage/current limit 0 mV 0 mA [ 9.995339]
polarity 0
[ 9.999888] Requesting mux mode 0, usb-role 0, orientation 0 [
10.001072]
state change INVALID_STATE -> SNK_UNATTACHED [ 10.001688] CC1: 0 ->
3,
CC2: 0 -> 0 [state SNK_UNATTACHED, polarity 0, connected] [
10.001693] state
change SNK_UNATTACHED -> SNK_ATTACH_WAIT [ 10.001699] state change
SNK_ATTACH_WAIT -> PORT_RESET [ 10.001709] 0-0052:
registered
[ 10.015559] Setting voltage/current limit 0 mV 0 mA [ 10.015564]
polarity 0
[ 10.018415] Requesting mux mode 0, usb-role 0, orientation 0 [
10.018915]
cc:=0 [ 10.020105] pending state change PORT_RESET ->
PORT_RESET_WAIT_OFF @
100 ms
[ 10.021369] CC1: 3 -> 0, CC2: 0 -> 0 [state PORT_RESET, polarity 0,
disconnected] [ 10.021374] state change PORT_RESET -> SNK_UNATTACHED
[ 10.021384] Start DRP toggling [ 10.026761] CC1: 0 -> 0, CC2: 0
-> 0 [state
DRP_TOGGLING, polarity 0, disconnected]
[ 102.839786] VBUS off
[ 102.843610] VBUS off
[ 107.269437] VBUS on
[ 107.270646] VBUS on
[ 107.273120] VBUS on
[ 265.490589] VBUS off
