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Sat, 26 Sep 2026 07:17:26 -0700 (PDT) From: =?UTF-8?q?Veysi=20=C3=96zg=C3=BCn?= To: Hilda Wu Cc: marcel@holtmann.org, luiz.dentz@gmail.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, alex_lu@realsil.com.cn, jason_mao@realsil.com.cn, zoey_zhou@realsil.com.cn, max.chou@realtek.com, kidman@realtek.com Subject: Re: [PATCH v8] Bluetooth: btrtl: Add firmware format v3 support Date: Sat, 26 Sep 2026 17:16:53 +0300 Message-ID: <20260926141653.4994-1-veysiiozgun@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260923104521.1706251-1-hildawu@realtek.com> References: <20260923104521.1706251-1-hildawu@realtek.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Hilda, I tested v8 on a Lenovo LOQ 15ARP10E (83S0) with the RTL8852BU controller (0bda:b853, hci_rev 0x000b, lmp_subver 0x8852, rom_version 3). With the current linux-firmware this controller never comes up, as reported in [1]. Setup: - Kernel 7.1.5 (Kali). I applied v8 to drivers/bluetooth from that tree. The only conflict was in btusb.c (btusb_main.c upstream); I applied the btusb_recv_event_realtek() change there by hand. btrtl.c, btrtl.h, btrtl_enh.c and the Makefile applied as is. - Firmware: rtl8852bd_mp_chip_new.dat from the Windows driver 18.4032.0.3008, installed unchanged as rtl_bt/rtl8852bu_fw.bin. Result: RTL: subsection (0000:00), chip id 20, cut 0x04, len 0000f070 RTL: subsection (0000:01), chip id 20, cut 0x04, len 00000238 RTL: subsection (0000:02), chip id 20, cut 0x04, len 00000b54 RTL: firmware section payload total len: 0x0000fdfc RTL: Watchdog reset status 00 RTL: fw version 0x3c91950e The controller registers with mgmt with its real BD_ADDR. I tested: - scanning (nearby BR/EDR and LE devices show up) - pairing and connecting a headset (Galaxy Buds4 Pro), audio over A2DP (SBC) - cold boot: the firmware loads from scratch and the headset reconnects - suspend/resume (s2idle): the firmware is loaded again on resume and the headset reconnects There are no btusb/btrtl errors in dmesg. This also answers my mail in [1]: v8 already implements the 0xfc62 sequence I saw in the Windows USB capture, so please ignore my question there. Tested-by: Veysi Özgün [1] https://lore.kernel.org/linux-bluetooth/20260926135219.13925-1-veysiiozgun@gmail.com/ Thanks, Veysi