> I have a Huawei Matebook 14 AMD 2021 laptop for which the sound isn't > supported on Linux. On further investigation in Windows and ACPI tables > I could determine that this particular SKU has an ES8336 codec connected > to the CPU ACP module. > The CPU of my laptop is an AMD Ryzen 5 5500U which seems to be codenamed > Lucienne and is a derivation of the Renoir family. > Acording to lspci the ACP is revision 1: > > 03:00.5 Multimedia controller [0480]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2/FireFlight/Renoir Audio Processor [1022:15e2] (rev 01) > Subsystem: Device [1e83:3e4d] > Kernel driver in use: snd_rn_pci_acp3x > Kernel modules: snd_pci_acp3x, snd_rn_pci_acp3x, snd_pci_acp5x, > snd_pci_acp6x, snd_acp_pci, snd_rpl_pci_acp6x, > snd_sof_amd_renoir > > I have written a machine driver for this platform and managed to make > the sound and internal microphone work. I am looking to integrate this > support but there are some issues with the current implementation of ACP > support. > > As far as I can tell there are 4 directions I could take to add support: > > 1. A standalone machine driver in sound/soc/amd that uses the platform > drivers from sound/soc/amd/raven/ > > 2. An embedded driver in sound/soc/amd/acp/acp-legacy-mach.c > > 3. A standalone machine driver in sound/soc/amd that uses the platform > drivers from sound/soc/amd/renoir > > 4. Use the SOF infrastructure The main issue with this codec is the mind-blowing proliferation of configurations and quirks. I can't comment on AMD-specific stuff, but would recommend you take a look at the GitHub PR we've been reviewing to extract as much information as possible from ACPI _DSM tables (as done by the Windows driver). see https://github.com/thesofproject/linux/pull/4112 (credits to Mauro Chehab for fixing and testing on real hardware and David Yang for providing the DSM information and comments).
