diff options
| author | Daniel Winkler <danielwinkler@google.com> | 2020-12-03 12:12:51 -0800 |
|---|---|---|
| committer | Johan Hedberg <johan.hedberg@intel.com> | 2020-12-07 17:01:38 +0200 |
| commit | 7c395ea521e6c8d77f643be61bf2f0f3a1f5b3e8 (patch) | |
| tree | 5e3d791afeb45da4d0b44830849253eb1ad2219a /net/bluetooth/hci_core.c | |
| parent | 9bf9f4b6301ffbd51674e1168f8eeed214d2cf99 (diff) | |
| download | linux-7c395ea521e6c8d77f643be61bf2f0f3a1f5b3e8.tar.bz2 | |
Bluetooth: Query LE tx power on startup
Queries tx power via HCI_LE_Read_Transmit_Power command when the hci
device is initialized, and stores resulting min/max LE power in hdev
struct. If command isn't available (< BT5 support), min/max values
both default to HCI_TX_POWER_INVALID.
This patch is manually verified by ensuring BT5 devices correctly query
and receive controller tx power range.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Diffstat (limited to 'net/bluetooth/hci_core.c')
| -rw-r--r-- | net/bluetooth/hci_core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 8855d07534ed..9d2c9a1c552f 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -741,6 +741,12 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt) hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL); } + if (hdev->commands[38] & 0x80) { + /* Read LE Min/Max Tx Power*/ + hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER, + 0, NULL); + } + if (hdev->commands[26] & 0x40) { /* Read LE White List Size */ hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, @@ -3660,6 +3666,8 @@ struct hci_dev *hci_alloc_dev(void) hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES; hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION; hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT; + hdev->min_le_tx_power = HCI_TX_POWER_INVALID; + hdev->max_le_tx_power = HCI_TX_POWER_INVALID; hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT; hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT; |