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Bluetooth: btusb: Ignore zero length of USB packets on ALT 6 for specific chip

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For USB ALT 6 settings some Realtek chips need to transmit mSBC data
continuously without the zero length of USB packets.
In this commit, create BTUSB_ALT6_CONTINUOUS_TX to manage the behavior.
Therefore, create REALTEK_ALT6_CONTINUOUS_TX_CHIP to manage the specific
chip model for the behavior.

Signed-off-by: Max Chou <max.chou@realtek.com>
Signed-off-by: Hilda Wu <hildawu@realtek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Hilda Wu 2022-10-05 16:43:31 +08:00 committed by Luiz Augusto von Dentz
parent 5b355944b1
commit a479e71322
2 changed files with 30 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/bluetooth/btrtl.c
View File

@ -781,6 +781,13 @@ void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
case CHIP_ID_8852C:
set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
/* RTL8852C needs to transmit mSBC data continuously without
* the zero length of USB packets for the ALT 6 supported chips
*/
if (btrtl_dev->project_id == CHIP_ID_8852C)
btrealtek_set_flag(hdev, REALTEK_ALT6_CONTINUOUS_TX_CHIP);
hci_set_aosp_capable(hdev);
break;
default:

25
drivers/bluetooth/btusb.c
View File

@ -632,6 +632,7 @@ static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
#define BTUSB_TX_WAIT_VND_EVT 13
#define BTUSB_WAKEUP_AUTOSUSPEND 14
#define BTUSB_USE_ALT3_FOR_WBS 15
#define BTUSB_ALT6_CONTINUOUS_TX 16
struct btusb_data {
struct hci_dev *hdev;
@ -1322,11 +1323,17 @@ static void btusb_isoc_complete(struct urb *urb)
static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
int mtu, struct btusb_data *data)
{
int i, offset = 0;
int i = 0, offset = 0;
unsigned int interval;
BT_DBG("len %d mtu %d", len, mtu);
/* For mSBC ALT 6 settings some chips need to transmit the data
* continuously without the zero length of USB packets.
*/
if (test_bit(BTUSB_ALT6_CONTINUOUS_TX, &data->flags))
goto ignore_usb_alt6_packet_flow;
/* For mSBC ALT 6 setting the host will send the packet at continuous
* flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
* 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
@ -1346,6 +1353,7 @@ static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
urb->iso_frame_desc[i].length = offset;
}
ignore_usb_alt6_packet_flow:
if (len && i < BTUSB_MAX_ISOC_FRAMES) {
urb->iso_frame_desc[i].offset = offset;
urb->iso_frame_desc[i].length = len;
@ -2368,6 +2376,19 @@ static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
return -EILSEQ;
}
static int btusb_setup_realtek(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);
int ret;
ret = btrtl_setup_realtek(hdev);
if (btrealtek_test_flag(data->hdev, REALTEK_ALT6_CONTINUOUS_TX_CHIP))
set_bit(BTUSB_ALT6_CONTINUOUS_TX, &data->flags);
return ret;
}
/* UHW CR mapping */
#define MTK_BT_MISC 0x70002510
#define MTK_BT_SUBSYS_RST 0x70002610
@ -3969,7 +3990,7 @@ static int btusb_probe(struct usb_interface *intf,
if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
(id->driver_info & BTUSB_REALTEK)) {
hdev->setup = btrtl_setup_realtek;
hdev->setup = btusb_setup_realtek;
hdev->shutdown = btrtl_shutdown_realtek;
hdev->cmd_timeout = btusb_rtl_cmd_timeout;