Hi Joseph, > Some of Mediatek's controllers/firmwares do NOT support AOSP extensions. > > Please refer to this Gerrit patch review link for chrome os > (https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/3054233/8/drivers/bluetooth/btusb.c) > which was reviewed by Mark-YW Chen, Mediatek's engineer. > > As an example, MediaTek MT7615E does not support the AOSP extensions. > > That was why I used a new BTUSB_QUALITY_REPORT flag in the changes v4 > and earlier ones. > > Please let me know how you would like to proceed with this patch. I want that inside the Mediatek specific hdev->setup() procedure, they decide if AOSP extensions are supported or not. The BTUSB flag business is getting out of hand. I really don’t want that in btusb.c anymore. I moved Intel over to do that in btintel.c and also Realtek is doing it in btrtl.c for their hardware with the MSFT extensions. We are not doing try-and-error of HCI commands. Just keep that in mind since I said that multiple times now. Regards Marcel