Dear receivers,
Is there any comment for the changes? Thanks!
On 7/26/2024 5:58 PM, Cheng Jiang wrote:
> For the WCN6750/WCN6855/WCN7850, the vendor command for a baudrate
> change is not sent as synchronous HCI command, controller sends the
> corresponding vendor event with the new baudrate. It needs to be
> dropped, otherwise it may be misinterpreted as response to a later
> command.
>
> Signed-off-by: Cheng Jiang <quic_chejiang@xxxxxxxxxxx>
> ---
> drivers/bluetooth/hci_qca.c | 16 +++++++++++++++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index ca6466676902..f497d601e035 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -1206,7 +1206,15 @@ static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
> * vendor command).
> */
>
> - if (hdr->evt == HCI_EV_VENDOR)
> + /* For the WCN6750/WCN6855/WCN7850, like the WCN3990, the
> + * vendor command for a baudrate change command isn't sent as
> + * synchronous HCI command, the controller sends the corresponding
> + * command complete event with the new baudrate. The event is
> + * received and properly decoded after changing the baudrate of
> + * the host port. It needs to be dropped.
> + */
> +
> + if (hdr->evt == HCI_EV_VENDOR || hdr->evt == HCI_EV_CMD_COMPLETE)
> complete(&qca->drop_ev_comp);
>
> kfree_skb(skb);
> @@ -1497,6 +1505,9 @@ static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
>
> switch (soc_type) {
> case QCA_WCN3990:
> + case QCA_WCN6750:
> + case QCA_WCN6855:
> + case QCA_WCN7850:
> reinit_completion(&qca->drop_ev_comp);
> set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
> break;
> @@ -1531,6 +1542,9 @@ static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
>
> switch (soc_type) {
> case QCA_WCN3990:
> + case QCA_WCN6750:
> + case QCA_WCN6855:
> + case QCA_WCN7850:
> /* Wait for the controller to send the vendor event
> * for the baudrate change command.
> */
