On Wed, Jun 21, 2023 at 7:47 AM Evan Quan <evan.quan@xxxxxxx> wrote: > > From: Mario Limonciello <mario.limonciello@xxxxxxx> > > Due to electrical and mechanical constraints in certain platform designs > there may be likely interference of relatively high-powered harmonics of > the (G-)DDR memory clocks with local radio module frequency bands used > by Wifi 6/6e/7. > > To mitigate this, AMD has introduced an ACPI based mechanism that > devices can use to notify active use of particular frequencies so > that devices can make relative internal adjustments as necessary > to avoid this resonance. > > In order for a device to support this, the expected flow for device > driver or subsystems: > > Drivers/subsystems contributing frequencies: > > 1) During probe, check `wbrf_supported_producer` to see if WBRF supported The prefix should be acpi_wbrf_ or acpi_amd_wbrf_ even, so it is clear that this uses ACPI and is AMD-specific. Whether or not there needs to be an intermediate library wrapped around this is a different matter.
