Patch "usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs" has been added to the 4.8-stable tree

Patch "usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-dwc3-gadget-set-pcm1-field-of-isochronous-first-trbs.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 6b9018d4c1e5c958625be94a160a5984351d4632 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <felipe.balbi@linux.intel.com>
Date: Thu, 22 Sep 2016 11:01:01 +0300
Subject: usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs

From: Felipe Balbi <felipe.balbi@linux.intel.com>

commit 6b9018d4c1e5c958625be94a160a5984351d4632 upstream.

In case of High-Speed, High-Bandwidth endpoints, we
need to tell DWC3 that we have more than one packet
per interval. We do that by setting PCM1 field of
Isochronous-First TRB.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/dwc3/gadget.c |   13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -775,6 +775,9 @@ static void dwc3_prepare_one_trb(struct
 		unsigned length, unsigned last, unsigned chain, unsigned node)
 {
 	struct dwc3_trb		*trb;
+	struct dwc3		*dwc = dep->dwc;
+	struct usb_gadget	*gadget = &dwc->gadget;
+	enum usb_device_speed	speed = gadget->speed;
 
 	dwc3_trace(trace_dwc3_gadget, "%s: req %p dma %08llx length %d%s%s",
 			dep->name, req, (unsigned long long) dma,
@@ -804,10 +807,16 @@ static void dwc3_prepare_one_trb(struct
 		break;
 
 	case USB_ENDPOINT_XFER_ISOC:
-		if (!node)
+		if (!node) {
 			trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
-		else
+
+			if (speed == USB_SPEED_HIGH) {
+				struct usb_ep *ep = &dep->endpoint;
+				trb->size |= DWC3_TRB_SIZE_PCM1(ep->mult - 1);
+			}
+		} else {
 			trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS;
+		}
 
 		/* always enable Interrupt on Missed ISOC */
 		trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;


Patches currently in stable-queue which might be from felipe.balbi@linux.intel.com are

queue-4.8/usb-gadget-composite-always-set-ep-mult-to-a-sensible-value.patch
queue-4.8/usb-gadget-f_uac2-fix-error-handling-at-afunc_bind.patch
queue-4.8/usb-dwc3-gadget-set-pcm1-field-of-isochronous-first-trbs.patch
queue-4.8/usb-gadget-composite-correctly-initialize-ep-maxpacket.patch