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usb: dwc2: host: Add scheduler tracing

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In preparation for future changes to the scheduler let's add some
tracing that makes it easy for us to see what's happening.  By default
this tracing will be off.

By changing "core.h" you can easily trace to ftrace, the console, or
nowhere.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Douglas Anderson
2016-01-28 18:19:58 -08:00
committed by Felipe Balbi
parent c9c8ac0150
commit 74fc4a7558
4 changed files with 53 additions and 2 deletions
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6
drivers/usb/dwc2/hcd_intr.c
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@@ -138,13 +138,17 @@ static void dwc2_sof_intr(struct dwc2_hsotg *hsotg)
while (qh_entry != &hsotg->periodic_sched_inactive) {
qh = list_entry(qh_entry, struct dwc2_qh, qh_list_entry);
qh_entry = qh_entry->next;
if (dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number))
if (dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number)) {
dwc2_sch_vdbg(hsotg, "QH=%p ready fn=%04x, sch=%04x\n",
qh, hsotg->frame_number, qh->sched_frame);
/*
* Move QH to the ready list to be executed next
* (micro)frame
*/
list_move_tail(&qh->qh_list_entry,
&hsotg->periodic_sched_ready);
}
}
tr_type = dwc2_hcd_select_transactions(hsotg);
if (tr_type != DWC2_TRANSACTION_NONE)