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Subject: Re: [PATCH] Bluetooth: btrtl: Ask ic_info to drop firmware
From:   Marcel Holtmann <marcel@holtmann.org>
In-Reply-To: <912f4b6441b54a1d89df6ffe4a0511ab@realtek.com>
Date:   Thu, 7 Oct 2021 17:56:41 +0200
Cc:     Johan Hedberg <johan.hedberg@gmail.com>,
        Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
        "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>,
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        "kai.heng.feng@canonical.com" <kai.heng.feng@canonical.com>,
        "apusaka@chromium.org" <apusaka@chromium.org>,
        Max Chou <max.chou@realtek.com>,
        "alex_lu@realsil.com.cn" <alex_lu@realsil.com.cn>,
        KidmanLee <kidman@realtek.com>
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References: <20210930103634.1710-1-hildawu@realtek.com>
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To:     Hilda Wu <hildawu@realtek.com>
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Hi Hilda,

> The MSFT extension has a HCI_VS_MSFT_Read_Supported_Features command. The AOSP extension has a read capability cmd too.
> https://docs.microsoft.com/en-us/windows-hardware/drivers/bluetooth/microsoft-defined-bluetooth-hci-commands-and-events#hci_vs_msft_read_supported_features
> https://source.android.com/devices/bluetooth/hci_requirements#vendor-specific-capabilities
> If commands did not support, the controller should feedback event status as Unknown HCI Command (0x01).
> We can go on this way.

I am not doing trial-and-error programming here. I rather better disable any extensions for Realtek devices altogether.

Regards

Marcel