The core requires the extra two bits of information for properly
scheduling Isochronous transfers. This means that we can't rely on
__dwc3_gadget_get_frame(). Let's always cache uFrame number from
XferNotReady instead.
Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
---
drivers/usb/dwc3/gadget.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 97ae480e4999..00a429db158b 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1250,7 +1250,7 @@ static int __dwc3_gadget_get_frame(struct dwc3 *dwc)
return DWC3_DSTS_SOFFN(reg);
}
-static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep, u32 cur_uf)
+static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep)
{
if (list_empty(&dep->pending_list)) {
dev_info(dep->dwc->dev, "%s: ran out of requests\n",
@@ -1263,7 +1263,7 @@ static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep,
u32 cur_uf)
* Schedule the first trb for one interval in the future or at
* least 4 microframes.
*/
- dep->frame_number = cur_uf + max_t(u32, 4, dep->interval);
+ dep->frame_number += max_t(u32, 4, dep->interval);
__dwc3_gadget_kick_transfer(dep);
}
@@ -1306,10 +1306,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep,
struct dwc3_request *req)
dwc3_stop_active_transfer(dep, true);
dep->flags = DWC3_EP_ENABLED;
} else {
- u32 cur_uf;
-
- cur_uf = __dwc3_gadget_get_frame(dwc);
- __dwc3_gadget_start_isoc(dep, cur_uf);
+ __dwc3_gadget_start_isoc(dep);
dep->flags &= ~DWC3_EP_PENDING_REQUEST;
}
return 0;
@@ -2433,8 +2430,9 @@ static void
dwc3_gadget_endpoint_transfer_not_ready(struct dwc3_ep *dep,
mask = ~(dep->interval - 1);
cur_uf = event->parameters & mask;
+ dep->frame_number = cur_uf;
- __dwc3_gadget_start_isoc(dep, cur_uf);
+ __dwc3_gadget_start_isoc(dep);
}
static void dwc3_endpoint_interrupt(struct dwc3 *dwc,
--
2.16.1
--
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