On Mon, Dec 12, 2022 at 3:10 PM Fabio Estevam <festevam@xxxxxxxxx> wrote:
>
> Hi,
>
> On an imx7d-based board running kernel 5.10.158, I noticed that a
> Quectel BG96 modem is gone after sending a reset command via AT:
Disabling runtime pm like this:
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c
b/drivers/usb/chipidea/ci_hdrc_imx.c
index 9ffcecd3058c..e2a263d583f9 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -62,7 +62,6 @@ static const struct ci_hdrc_imx_platform_flag
imx6ul_usb_data = {
};
static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
- .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
};
static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
makes the USB modem to stay connected after the reset command:
# microcom /dev/ttyUSB3
>AT+CFUN=1,1
OK
[ 31.339416] usb 2-1: USB disconnect, device number 2
[ 31.349480] option1 ttyUSB0: GSM modem (1-port) converter now
disconnected from ttyUSB0
[ 31.358298] option 2-1:1.0: device disconnected
[ 31.366390] option1 ttyUSB1: GSM modem (1-port) converter now
disconnected from ttyUSB1
[ 31.374883] option 2-1:1.1: device disconnected
[ 31.383359] option1 ttyUSB2: GSM modem (1-port) converter now
disconnected from ttyUSB2
[ 31.391800] option 2-1:1.2: device disconnected
[ 31.404700] option1 ttyUSB3: GSM modem (1-port) converter now
disconnected from ttyUSB3
# [ 31.413261] option 2-1:1.3: device disconnected
[ 36.151388] usb 2-1: new high-speed USB device number 3 using ci_hdrc
[ 36.354398] usb 2-1: New USB device found, idVendor=2c7c,
idProduct=0296, bcdDevice= 0.00
[ 36.362768] usb 2-1: New USB device strings: Mfr=3, Product=2, SerialNumber=4
[ 36.370031] usb 2-1: Product: Qualcomm CDMA Technologies MSM
[ 36.375818] usb 2-1: Manufacturer: Qualcomm, Incorporated
[ 36.381355] usb 2-1: SerialNumber: 7d1563c1
[ 36.389915] option 2-1:1.0: GSM modem (1-port) converter detected
[ 36.397679] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB0
[ 36.412591] option 2-1:1.1: GSM modem (1-port) converter detected
[ 36.420237] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB1
[ 36.434988] option 2-1:1.2: GSM modem (1-port) converter detected
[ 36.442792] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB2
[ 36.457745] option 2-1:1.3: GSM modem (1-port) converter detected
[ 36.465709] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB3
Does anyone have any suggestions as to what could be the problem with
runtime pm?
