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RE: [PATCH v5 2/2] Bluetooth: btmrvl: add calibration data download support

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Hi Marcel,

> > The reason of not using __hci_cmd_sync() is that we are sending vendor specific command here
> (MRVL_VENDOR_PKT). The __hci_cmd_sync seems handle HCI_COMMAND_PKT only.
> > Please let us know if you have any suggestion to solve this problem.
> 
> what is a MRVL_VENDOR_PKT actually?

It's defined as 0xfe in our driver. The firmware doesn't understand 0xff (HCI_VENDOR_PKT).

> 
> If you guys are not using standard HCI command/event for vendor operation, then this obviously does
> not fit. However a similar model might make sense instead of manually building packets all the time.

We can extend __hci_cmd_sync() function with a new parameter 'type'.
This way we can pass HCI_VENDOR_PKT into __hci_cmd_sync(), while other drivers will pass in HCI_COMMAND_PKT.

Our driver will make HCI_VENDOR_PKT -> MRVL_VENDOR_PKT conversion before downloading the frame to firmware. And the MRVL_VENDOR_PKT frame from firmware will be replaced with HCI_VENDOR_PKT while uploading the frame to stack.

Please let us know if this approach works for you or not.

Thanks,
Bing

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