platform/x86/amd: Add support for AMD ACPI based Wifi band RFI mitigation feature

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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 a mechanism that devices can use to
notify active use of particular frequencies so that other devices can make
relative internal adjustments as necessary to avoid this resonance.

Co-developed-by: Evan Quan <quanliangl@hotmail.com>
Signed-off-by: Evan Quan <quanliangl@hotmail.com>
Signed-off-by: Ma Jun <Jun.Ma2@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

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Ma Jun 2023-12-11 18:06:23 +08:00 • committed by Hans de Goede

parent 2128f3cca5

commit 58e82a6266

4 changed files with 423 additions and 0 deletions

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14

drivers/platform/x86/amd/Kconfig

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1

drivers/platform/x86/amd/Makefile

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317

drivers/platform/x86/amd/wbrf.c

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91

include/linux/acpi_amd_wbrf.h

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