[PATCH v5 0/2] Bluetooth: btrtl: add support for the RTL8723CS

From: Bastian Germann
Date: Sun Feb 12 2023 - 07:42:22 EST


Pinebook uses RTL8723CS for WiFi and bluetooth. Unfortunately, RTL8723CS
has broken BT-4.1 support, so it requires a quirk.

Add a quirk and wire up 8723CS support in btrtl.
I was asked for a btmon output without the quirk;
however, using the chip without the quirk ends up in a bad state with
"Opcode 0x c77 failed: -56" (HCI_OP_READ_SYNC_TRAIN_PARAMS) on training.
A btmon output with the quirk active was already sent by Vasily.

v1 of this series was sent in July 2020 by Vasily Khoruzhick.
I have tested it to work on the Pinebook.

Changelog:
v2:
* Rebase
* Add uart-has-rtscts to device tree as requested by reviewer
v3:
* Drop the device tree as it was split out and is already integrated.
* Rename the quirk as requested by reviewer Marcel Holtmann
v4:
* Use skb_pull_data as requested by reviewer Luiz Augusto von Dentz
v5:
* Make use of skb_pull_data's length check

Vasily Khoruzhick (2):
Bluetooth: Add new quirk for broken local ext features page 2
Bluetooth: btrtl: add support for the RTL8723CS

drivers/bluetooth/btrtl.c | 120 ++++++++++++++++++++++++++++++++++--
drivers/bluetooth/btrtl.h | 5 ++
drivers/bluetooth/hci_h5.c | 4 ++
include/net/bluetooth/hci.h | 7 +++
net/bluetooth/hci_event.c | 4 +-
5 files changed, 135 insertions(+), 5 deletions(-)

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2.39.1