diff options
| author | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2025-03-12 11:14:20 -0400 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2025-03-25 12:46:40 -0400 |
| commit | 13218453521d75916dfed55efb8e809bfc03cb4b (patch) | |
| tree | 9037142ed3d098120164a66866b26b3e88a24112 /include/net/bluetooth/hci_core.h | |
| parent | 42c6c7a0cfc4339cf9727a64f3e7d7d66a26855d (diff) | |
| download | linux-13218453521d75916dfed55efb8e809bfc03cb4b.tar.gz linux-13218453521d75916dfed55efb8e809bfc03cb4b.tar.bz2 linux-13218453521d75916dfed55efb8e809bfc03cb4b.zip | |
Bluetooth: hci_core: Enable buffer flow control for SCO/eSCO
This enables buffer flow control for SCO/eSCO
(see: Bluetooth Core 6.0 spec: 6.22. Synchronous Flow Control Enable),
recently this has caused the following problem and is actually a nice
addition for the likes of Socket TX complete:
< HCI Command: Read Buffer Size (0x04|0x0005) plen 0
> HCI Event: Command Complete (0x0e) plen 11
Read Buffer Size (0x04|0x0005) ncmd 1
Status: Success (0x00)
ACL MTU: 1021 ACL max packet: 5
SCO MTU: 240 SCO max packet: 8
...
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
< SCO Data TX: Handle 257 flags 0x00 dlen 120
> HCI Event: Hardware Error (0x10) plen 1
Code: 0x0a
To fix the code will now attempt to enable buffer flow control when
HCI_QUIRK_SYNC_FLOWCTL_SUPPORTED is set by the driver:
< HCI Command: Write Sync Fl.. (0x03|0x002f) plen 1
Flow control: Enabled (0x01)
> HCI Event: Command Complete (0x0e) plen 4
Write Sync Flow Control Enable (0x03|0x002f) ncmd 1
Status: Success (0x00)
On success then HCI_SCO_FLOWCTL would be set which indicates sco_cnt
shall be used for flow contro.
Fixes: 7fedd3bb6b77 ("Bluetooth: Prioritize SCO traffic")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Tested-by: Pauli Virtanen <pav@iki.fi>
Diffstat (limited to 'include/net/bluetooth/hci_core.h')
| -rw-r--r-- | include/net/bluetooth/hci_core.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 7966db4038cc..f78e4298e39a 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -1858,6 +1858,7 @@ void hci_conn_del_sysfs(struct hci_conn *conn); #define lmp_hold_capable(dev) ((dev)->features[0][0] & LMP_HOLD) #define lmp_sniff_capable(dev) ((dev)->features[0][0] & LMP_SNIFF) #define lmp_park_capable(dev) ((dev)->features[0][1] & LMP_PARK) +#define lmp_sco_capable(dev) ((dev)->features[0][1] & LMP_SCO) #define lmp_inq_rssi_capable(dev) ((dev)->features[0][3] & LMP_RSSI_INQ) #define lmp_esco_capable(dev) ((dev)->features[0][3] & LMP_ESCO) #define lmp_bredr_capable(dev) (!((dev)->features[0][4] & LMP_NO_BREDR)) |