diff options
| author | Chen Yu <[email protected]> | 2017-01-23 14:59:57 -0800 |
|---|---|---|
| committer | Felipe Balbi <[email protected]> | 2017-01-24 16:19:09 +0200 |
| commit | 9156a7ef1c3ba482f85f2733edcde2b10189de8c (patch) | |
| tree | 219460a6883bb17bfe567f892014df04954ff534 | |
| parent | fc30c4bb44a3665edcc76bd7af93f009bc9dc672 (diff) | |
usb: dwc2: Force port resume on switching to device mode
We've seen failures when switching between host and gadget mode,
which was diagnosed as being caused due to the bus being
auto-suspended when we switched.
So this patch forces a port resume when switching to device
mode if the bus is suspended.
Cc: Wei Xu <[email protected]>
Cc: Guodong Xu <[email protected]>
Cc: Amit Pundir <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: John Youn <[email protected]>
Cc: Douglas Anderson <[email protected]>
Cc: Chen Yu <[email protected]>
Cc: Vardan Mikayelyan <[email protected]>
Cc: Kishon Vijay Abraham I <[email protected]>
Cc: Felipe Balbi <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: [email protected]
Signed-off-by: Chen Yu <[email protected]>
Signed-off-by: John Stultz <[email protected]>
Signed-off-by: John Youn <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index e0d152f2c81b..1f670c3429a6 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -54,6 +54,8 @@ #include "core.h" #include "hcd.h" +static void dwc2_port_resume(struct dwc2_hsotg *hsotg); + /* * ========================================================================= * Host Core Layer Functions @@ -3231,6 +3233,11 @@ static void dwc2_conn_id_status_change(struct work_struct *work) if (gotgctl & GOTGCTL_CONID_B) { /* Wait for switch to device mode */ dev_dbg(hsotg->dev, "connId B\n"); + if (hsotg->bus_suspended) { + dev_info(hsotg->dev, + "Do port resume before switching to device mode\n"); + dwc2_port_resume(hsotg); + } while (!dwc2_is_device_mode(hsotg)) { dev_info(hsotg->dev, "Waiting for Peripheral Mode, Mode=%s\n", |