Dear Nobuaki,
Thank you for your reply.
Am 21.05.24 um 03:43 schrieb Nobuaki.Tsunashima@xxxxxxxxxxxx:
CYW4373 ROM FW has an issue that it claims LE_Read_Transmit_Power
command as supported in a response of Read_Local_Supported_Command
command but rejects the LE_Read_Transmit_Power command with "Unknown HCI Command" status.
Due to the issue, Bluetooth driver of 5.15 and later kernel fails to hci up.
Why not 5.14?
More precisely, there was no problem with 5.10 and the issue was firstly
reported with 5.15. So, not sure for the interim versions. If the exact version
the issue was firstly introduced is needed, I will take some effort for it.
As you have the test setup, and bisecting is normally very quick, it’d
be great if you could pinpoint the commit causing the regression.
[…]
Kind regards,
Paul
