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[Qemu-devel] [PATCH 5/7] xhci iso: allow for some latency
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH 5/7] xhci iso: allow for some latency |
Date: |
Tue, 18 Feb 2014 16:50:52 +0100 |
Allow the scheduled transfer time be a bit behind, to
compensate for latencies. Without this xhci will wait
way to often for the mfindex wraparound, assuming the
scheduled time is in the future just because qemu is
a bit behind in processing the iso transfer requests.
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/usb/hcd-xhci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 706cdc7..8261d00 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -1977,7 +1977,7 @@ static void xhci_calc_iso_kick(XHCIState *xhci,
XHCITransfer *xfer,
xfer->mfindex_kick = ((xfer->trbs[0].control >> TRB_TR_FRAMEID_SHIFT)
& TRB_TR_FRAMEID_MASK) << 3;
xfer->mfindex_kick |= mfindex & ~0x3fff;
- if (xfer->mfindex_kick < mfindex) {
+ if (xfer->mfindex_kick + 0x100 < mfindex) {
xfer->mfindex_kick += 0x4000;
}
}
--
1.8.3.1
- [Qemu-devel] [PULL 0/7] usb patch queue, Gerd Hoffmann, 2014/02/18
- [Qemu-devel] [PATCH 4/7] xhci iso: fix time calculation, Gerd Hoffmann, 2014/02/18
- [Qemu-devel] [PATCH 2/7] xhci: fix overflow in usb_xhci_post_load, Gerd Hoffmann, 2014/02/18
- [Qemu-devel] [PATCH 7/7] xhci: use DPRINTF() instead of fprintf(stderr, ...), Gerd Hoffmann, 2014/02/18
- [Qemu-devel] [PATCH 1/7] usb: Remove magic constants from device bmAttributes, Gerd Hoffmann, 2014/02/18
- [Qemu-devel] [PATCH 3/7] uhci: invalidate queue on device address changes, Gerd Hoffmann, 2014/02/18
- [Qemu-devel] [PATCH 5/7] xhci iso: allow for some latency,
Gerd Hoffmann <=
- [Qemu-devel] [PATCH 6/7] xhci: switch debug printf to tracepoint, Gerd Hoffmann, 2014/02/18
- Re: [Qemu-devel] [PULL 0/7] usb patch queue, Peter Maydell, 2014/02/20