Messages in this thread | | | Subject | Re: [PATCH v2] Bluetooth: btusb: fix bt fiwmare downloading failure issue for qca btsoc. | From | Marcel Holtmann <> | Date | Wed, 26 May 2021 17:15:18 +0200 |
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Hi Zijun,
> This is btsoc timing issue, after host start to downloading bt firmware, > ep2 need time to switch from function acl to function dfu, so host add > 20ms delay as workaround. > > Signed-off-by: Tim Jiang <tjiang@codeaurora.org> > --- > drivers/bluetooth/btusb.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c > index 5245714..b0743db 100644 > --- a/drivers/bluetooth/btusb.c > +++ b/drivers/bluetooth/btusb.c > @@ -4064,6 +4064,7 @@ static int btusb_setup_qca_download_fw(struct hci_dev *hdev, > > sent += size; > count -= size;
you need a comment here explain why this is needed.
> + msleep(20); > > while (count) { > size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
Regards
Marcel
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