Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH v2] Bluetooth: btusb: Add support USB ALT 3 for WBS | Date | Fri, 14 May 2021 11:19:01 +0800 |
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From: Hilda Wu <hildawu@realtek.com>
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> --- Changes in v2: - Updated signed off name. - Adjusted coding style. --- --- drivers/bluetooth/btusb.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 6f253378e893..1e98f985740b 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1752,6 +1752,13 @@ 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) -- 2.17.1
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