[Bug 2007331] [NEW] Fix HFP mSBC support on Realtek Bluetooth USB controller

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Kai-Heng Feng (kaihengfeng):

[Impact]
When a BT headset is connected Realtek BT USB controller, HFP profile can't play or record sound when mSBC codec is used.

[Fix]
At Linux kernel side, add a Realtek specific quirk to support mSBC.

At PulseAudio side, send more data frames until the connected device
sends response.

[Test]
Connect different headsets to the said controller, HFP can play and record sounds now.
Also verified A2DP profile is unaffected.

[Where problems could occur]
The kernel part is Realtek specific, so the regression risk is very limited.

The pulseaudio side only affects HFP profile, since the codeflow only
changes when a mic is present.

** Affects: hwe-next
     Importance: Undecided
         Status: New

** Affects: linux-oem-6.0 (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: linux-oem-6.1 (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: pulseaudio (Ubuntu)
     Importance: Medium
         Status: Confirmed

** Affects: linux-oem-6.0 (Ubuntu Jammy)
     Importance: Medium
         Status: Confirmed

** Affects: linux-oem-6.1 (Ubuntu Jammy)
     Importance: Medium
         Status: Confirmed

** Affects: pulseaudio (Ubuntu Jammy)
     Importance: Medium
         Status: Confirmed

** Affects: linux-oem-6.0 (Ubuntu Kinetic)
     Importance: Undecided
         Status: Invalid

** Affects: linux-oem-6.1 (Ubuntu Kinetic)
     Importance: Undecided
         Status: Invalid

** Affects: pulseaudio (Ubuntu Kinetic)
     Importance: Medium
         Status: Confirmed

** Affects: linux-oem-6.0 (Ubuntu Lunar)
     Importance: Undecided
         Status: Invalid

** Affects: linux-oem-6.1 (Ubuntu Lunar)
     Importance: Undecided
         Status: Invalid

** Affects: pulseaudio (Ubuntu Lunar)
     Importance: Medium
         Status: Confirmed


** Tags: oem-priority originate-from-1998757 stella
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Fix HFP mSBC support on Realtek Bluetooth USB controller
https://bugs.launchpad.net/bugs/2007331
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