APPLIED[M]: [PATCH 0/1][SRU][Mantic] Audio device fails to function randomly on Intel MTL platform

[Andrea Righi]

On Thu, Sep 07, 2023 at 04:20:24AM +0800, You-Sheng Yang wrote:
> BugLink: https://bugs.launchpad.net/bugs/2034506
> 
> [Impact]
> 
> Audio device fails to function randomly on Intel MTL platform:
> ```
> sof-audio-pci-intel-mtl 0000:00:1f.3: no llp found, fall back to default HDA path
> sof-audio-pci-intel-mtl 0000:00:1f.3: COPIER (UUID: 9BA00C83-CA12-4A83-943C-1FA2E82F9DDA): No CPC match in the firmware file's manifest (ibs/obs: 384/192)
> ```
> 
> [Fix]
> 
> Proposed fix in upstream commit 26ef47e5ba60 ("ASoC: SOF: ipc4-topology: Add
> module parameter to ignore the CPC value") that to allow ignoring CPC validation
> for current fw release.
> 
> [Test Case]
> 
> 1. Boot into OS
> 2. Check if the internal audio input & output devices work
> 3. Let system enter suspend, then wake system back up
> 4. Check if the audio input & output devices work
> 5. Connect an external audio device (e.g. bluetooth headset, external monitor)
>    and check if they work
> 6. Disconnect the external audio device
> 7. Check if the internal audio input & output devices work
> 8. Reboot system
> 9. Repeat above steps
> 
> [Where problems could occur]
> 
> While a 0 CPC value will force the DSP to run at full speed, this is going to
> impact power consumption until further fix being released for firmware.
> 
> [Other Info]
> 
> CPC checking landed to v6.5-rc1, so Mantic and oem-6.5 are nominated for fix.

Applied to mantic/linux.

Thanks,
-Andrea