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authorMikel Astiz <mikel.astiz@bmw-carit.de>2012-04-11 08:48:51 +0200
committerGustavo Padovan <gustavo@padovan.org>2012-05-09 01:40:35 -0300
commitf4001d28464d92db5cae7702d65cf18162043a12 (patch)
tree00b83db23f1ab1a88268570551ed9682d164fd52 /drivers/bluetooth
parent2d8b3a11623cf5203bc063927b6fc742625f1ebf (diff)
Bluetooth: btusb: Dynamic alternate setting
The alternate setting must be dynamically set according to the number of active SCO links, and the bit depth of the audio. The possible values for the alternate setting are described in the Bluetooth Core Specification, Volume 4, Part B, section 2.1.1. Signed-off-by: Mikel Astiz <mikel.astiz.oss@gmail.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/btusb.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 9217121362e1..de171211a1c8 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -855,6 +855,7 @@ static void btusb_work(struct work_struct *work)
{
struct btusb_data *data = container_of(work, struct btusb_data, work);
struct hci_dev *hdev = data->hdev;
+ int new_alts;
int err;
if (hdev->conn_hash.sco_num > 0) {
@@ -868,11 +869,19 @@ static void btusb_work(struct work_struct *work)
set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
}
- if (data->isoc_altsetting != 2) {
+
+ if (hdev->voice_setting & 0x0020) {
+ static const int alts[3] = { 2, 4, 5 };
+ new_alts = alts[hdev->conn_hash.sco_num - 1];
+ } else {
+ new_alts = hdev->conn_hash.sco_num;
+ }
+
+ if (data->isoc_altsetting != new_alts) {
clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
usb_kill_anchored_urbs(&data->isoc_anchor);
- if (__set_isoc_interface(hdev, 2) < 0)
+ if (__set_isoc_interface(hdev, new_alts) < 0)
return;
}