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authorDaniel Winkler <danielwinkler@google.com>2020-12-03 12:12:51 -0800
committerJohan Hedberg <johan.hedberg@intel.com>2020-12-07 17:01:38 +0200
commit7c395ea521e6c8d77f643be61bf2f0f3a1f5b3e8 (patch)
tree5e3d791afeb45da4d0b44830849253eb1ad2219a /net/bluetooth/hci_core.c
parent9bf9f4b6301ffbd51674e1168f8eeed214d2cf99 (diff)
downloadlinux-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.c8
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;