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linux/drivers/bluetooth
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Pauli Virtanen 55981d3541 Bluetooth: btusb: check conditions before enabling USB ALT 3 for WBS 
Some USB BT adapters don't satisfy the MTU requirement mentioned in
commit e848dbd364 ("Bluetooth: btusb: Add support USB ALT 3 for WBS")
and have ALT 3 setting that produces no/garbled audio. Some adapters
with larger MTU were also reported to have problems with ALT 3.

Add a flag and check it and MTU before selecting ALT 3, falling back to
ALT 1. Enable the flag for Realtek, restoring the previous behavior for
non-Realtek devices.

Tested with USB adapters (mtu<72, no/garbled sound with ALT3, ALT1
works) BCM20702A1 0b05:17cb, CSR8510A10 0a12:0001, and (mtu>=72, ALT3
works) RTL8761BU 0bda:8771, Intel AX200 8087:0029 (after disabling
ALT6). Also got reports for (mtu>=72, ALT 3 reported to produce bad
audio) Intel 8087:0a2b.

Signed-off-by: Pauli Virtanen <pav@iki.fi>
Fixes: e848dbd364 ("Bluetooth: btusb: Add support USB ALT 3 for WBS")
Tested-by: Michał Kępień <kernel@kempniu.pl>
Tested-by: Jonathan Lampérth <jon@h4n.dev>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2021-08-10 11:28:49 -07:00
..
ath3k.c Bluetooth: ath3k: use usb_control_msg_send() and usb_control_msg_recv() 2020-09-25 16:33:59 +02:00
bcm203x.c Bluetooth: Use fallthrough pseudo-keyword 2020-07-10 19:09:42 +02:00
bfusb.c Bluetooth: bfusb: Switch from BT_ERR to bt_dev_err where possible 2020-03-11 10:05:50 +02:00
bluecard_cs.c Bluetooth: Use fallthrough pseudo-keyword 2020-07-10 19:09:42 +02:00
bpa10x.c Bluetooth: bpa10x: change return value 2019-09-04 16:11:46 +02:00
bt3c_cs.c Bluetooth: bt3c_cs: Fix obsolete function 2018-09-27 12:57:39 +02:00
btbcm.c Bluetooth: btbcm: Add entry for BCM43430B0 UART Bluetooth 2021-06-26 07:12:28 +02:00
btbcm.h Bluetooth: btbcm: Make btbcm_setup_patchram use btbcm_finalize 2020-04-22 19:43:58 +02:00
btintel.c Bluetooth: btintel: Combine setting up MSFT extension 2021-08-05 16:03:30 +02:00
btintel.h Bluetooth: btintel: Clean the exported function to static 2021-08-05 16:03:30 +02:00
btmrvl_debugfs.c Bluetooth: btmrvl: Re-use kstrtol_from_user() 2018-05-30 08:16:05 +02:00
btmrvl_drv.h Bluetooth: btmrvl: Drop unused GPIO includes 2019-01-22 09:51:20 +01:00
btmrvl_main.c Bluetooth: btmrvl_sdio: Implement prevent_wake 2020-06-12 08:38:52 +02:00
btmrvl_sdio.c Bluetooth: btmrvl_sdio: Remove all strcpy() uses 2021-07-29 13:46:13 +02:00
btmrvl_sdio.h
btmtksdio.c Bluetooth: btmtksdio: Fixed switch and case should be at the same indent 2020-12-18 22:44:00 +01:00
btmtkuart.c Bluetooth: btmtkuart: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2021-06-26 07:12:38 +02:00
btqca.c Bluetooth: btqca: Moved extracting rom version info to common place 2021-06-26 07:12:30 +02:00
btqca.h Bluetooth: btqca: Add support for firmware image with mbn type for WCN6750 2021-06-26 07:12:29 +02:00
btqcomsmd.c Bluetooth: btqcomsmd: Fix a resource leak in error handling paths in the probe function 2020-12-18 22:20:21 +01:00
btrsi.c Bluetooth: btrsi: use non-kernel-doc comment for copyright 2021-07-22 16:35:46 +02:00
btrtl.c Bluetooth: btrtl: Set MSFT opcode for RTL8852 2021-07-22 16:20:27 +02:00
btrtl.h Bluetooth: hci_h5: Add RTL8822CS capabilities 2021-06-26 07:12:34 +02:00
btsdio.c Bluetooth: btsdio: Check for valid packet type 2020-01-15 22:28:51 +01:00
btusb.c Bluetooth: btusb: check conditions before enabling USB ALT 3 for WBS 2021-08-10 11:28:49 -07:00
dtl1_cs.c networking: add and use skb_put_u8() 2017-06-16 11:48:40 -04:00
h4_recv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hci_ag6xx.c Bluetooth: hci_uart: Remove redundant assignment to fw_ptr 2021-06-26 07:52:41 +02:00
hci_ath.c Bluetooth: hci_uart: check for missing tty operations 2019-07-31 13:17:33 -07:00
hci_bcm.c Bluetooth: hci_bcm: Fix kernel doc comments 2021-08-04 16:37:12 +02:00
hci_bcsp.c Bluetooth: Fix invalid-free in bcsp_close() 2019-11-04 15:19:02 +01:00
hci_h4.c Bluetooth: hci_h4: Remove a redundant assignment in 'h4_flush()' 2020-02-28 08:43:57 +01:00
hci_h5.c Bluetooth: hci_h5: Add runtime suspend 2021-07-23 14:10:23 +02:00
hci_intel.c Bluetooth: btintel: Check firmware version before download 2021-03-25 16:09:35 +01:00
hci_ldisc.c tty: no checking of tty_unregister_ldisc 2021-05-13 16:57:17 +02:00
hci_ll.c Bluetooth: hci_ll: add a small delay for wl1271 enable bt_en 2020-11-11 10:57:36 +01:00
hci_mrvl.c Bluetooth: hci_uart: check for missing tty operations 2019-07-31 13:17:33 -07:00
hci_nokia.c Bluetooth: hci_nokia: Save a few cycles in 'nokia_enqueue()' 2019-10-16 19:26:40 +02:00
hci_qca.c Bluetooth: hci_qca: Add support for QTI Bluetooth chip wcn6750 2021-06-26 07:12:29 +02:00
hci_serdev.c Bluetooth: hci_h5: Disable the hci_suspend_notifier for btrtl devices 2021-07-22 16:06:09 +02:00
hci_uart.h Bluetooth: hci_h5: Disable the hci_suspend_notifier for btrtl devices 2021-07-22 16:06:09 +02:00
hci_vhci.c Bluetooth: hci_vhci: Add support for ISO packets 2020-01-15 22:28:51 +01:00
Kconfig Bluetooth: Add support for virtio transport driver 2021-04-08 12:26:34 +02:00
Makefile Bluetooth: Add support for virtio transport driver 2021-04-08 12:26:34 +02:00
virtio_bt.c Bluetooth: virtio_bt: add missing null pointer check on alloc_skb call return 2021-06-26 07:12:24 +02:00