From: Gregory Herrero <gregory.herrero@xxxxxxxxx>
Frame number is reset in hardware after exiting hibernation.
Thus, reset frame_number and ensure qh are queued with correct
sched_frame.
Otherwise, qh->sched_frame may be too high compared to
current frame number (which is 0). This can delay addition of qh in
the list of transfers until frame number reaches qh->sched_frame.
Signed-off-by: Gregory Herrero <gregory.herrero@xxxxxxxxx>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@xxxxxxxxx>
Tested-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
---
drivers/usb/dwc2/core.c | 1 +
drivers/usb/dwc2/hcd_queue.c | 8 ++++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 1e67549..bd6a214 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -116,6 +116,7 @@ static int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg)
writel(hr->hprt0, hsotg->regs + HPRT0);
writel(hr->hfir, hsotg->regs + HFIR);
+ hsotg->frame_number = 0;
return 0;
}
diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c
index 3ad63d3..a821f19 100644
--- a/drivers/usb/dwc2/hcd_queue.c
+++ b/drivers/usb/dwc2/hcd_queue.c
@@ -583,6 +583,14 @@ int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
/* QH already in a schedule */
return 0;
+ if (!dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number) &&
+ !hsotg->frame_number) {
+ dev_dbg(hsotg->dev,
+ "reset frame number counter\n");
+ qh->sched_frame = dwc2_frame_num_inc(hsotg->frame_number,
+ SCHEDULE_SLOP);
+ }
+
/* Add the new QH to the appropriate schedule */
if (dwc2_qh_is_non_per(qh)) {
/* Always start in inactive schedule */
--
2.3.3
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