# patches/driver/bluetooth/btrtl/

Realtek Bluetooth driver (`drivers/bluetooth/btrtl.c`) patches.

## Patches

### `0009-Bluetooth-btrtl-make-RTL_SEC_PROJ-read-non-fatal.patch`

The btrtl HCI vendor-extension code probes `RTL_SEC_PROJ` (security
project ID) during firmware download. On some controllers the
extension is absent and the read times out, currently treated as a
fatal probe failure — the BT subsystem never comes up and the userspace
sees no HCI device.

This patch downgrades the failure to a warning so probe continues with
default firmware selection. Affected hardware:

- ampere (CoolPi GenBook): Realtek RTL8852BE (M.2 module)
- boltzmann (Rock 5 ITX+): same chip family on M.2

Source: `github.com/marfrit/misc_patches/genbook/kernel/0009`
Author: Markus Fritsche