diff options
| author |   Hilda Wu <hildawu@realtek.com> | 2021-05-14 11:19:01 +0800 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2021-06-26 07:12:33 +0200 |
| commit | e848dbd364aca44c9d23c04bef964fab79e2b34f (patch) | |
| tree | a2fa49f81fad8d297de9935305efb7109082f7d0 /drivers/bluetooth | |
| parent | Bluetooth: L2CAP: Fix invalid access on ECRED Connection response (diff) | |
| download | linux-dev-e848dbd364aca44c9d23c04bef964fab79e2b34f.tar.xz linux-dev-e848dbd364aca44c9d23c04bef964fab79e2b34f.zip | |
Bluetooth: btusb: Add support USB ALT 3 for WBS
Because mSBC frames do not need to be aligned to the SCO packet
boundary. Using USB ALT 3 let HCI payload >= 60 bytes, let mSBC
data satisfy 60 Bytes avoid payload unaligned situation and fixed
some headset no voise issue.
USB Alt 3 supported also need HFP support transparent MTU in 72 Bytes.
Signed-off-by: Hilda Wu <hildawu@realtek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index ff41fb0fb557..f7131059469e 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1756,6 +1756,13 @@ static void btusb_work(struct work_struct *work) * which work with WBS at all. */ new_alts = btusb_find_altsetting(data, 6) ? 6 : 1; + /* Because mSBC frames do not need to be aligned to the + * SCO packet boundary. If support the Alt 3, use the + * Alt 3 for HCI payload >= 60 Bytes let air packet + * data satisfy 60 bytes. + */ + if (new_alts == 1 && btusb_find_altsetting(data, 3)) + new_alts = 3; } if (btusb_switch_alt_setting(hdev, new_alts) < 0) |