diff options
| author | Subrata Banik <subratabanik@google.com> | 2023-06-12 18:07:33 +0530 |
|---|---|---|
| committer | Subrata Banik <subratabanik@google.com> | 2023-08-31 08:16:51 +0000 |
| commit | 6aca25c887ba9e7cce92e18ab77fc49c352ad12a (patch) | |
| tree | 24aa1fe74673963ab7022fab81c04f3a4f7ee79a | |
| parent | 1b25422215279191da7f71840da7214fbcb22b9c (diff) | |
mb/google/rex: Enable Fast V-Mode for MTL-U 15W
This patch sets the Fast V-Mode (FVM) configuration parameter as
suggested in Intel doc 640982. As per the doc, Intel MTL-U 15W CPU
supports FVM on IA and SA.
Fast V-Mode (FVM): Intel Meteor Lake introduces the ability to manage
the peak power events it calls "reactive peak power management".
The Fast V-Mode is one such technique to perform the reactive peak power
management. It relies on the detector integrated inside the processor
which senses when the processor load current exceeds a present threshold
by monitoring the processor power domain IMVP (Intel Mobile Voltage
Positioning) VR sense point.
The baseline ITRIP for IA is 66A and 21A for SA.
BUG=b:286809233
TEST=Able to build and boot google/rex without seeing any performance
regression.
Change-Id: Ia7157bddf2e9586e4a91cc55e48693561072cd05
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75763
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb index b21c011190..ec57ee7f46 100644 --- a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb +++ b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb @@ -73,6 +73,17 @@ chip soc/intel/meteorlake register "pch_hda_idisp_link_frequency" = "HDA_LINKFREQ_96MHZ" register "pch_hda_idisp_codec_enable" = "1" + # As per doc 640982, Intel MTL-U 15W CPU supports FVM on IA and SA + # The ICC Limit is represented in 1/4 A increments, i.e., a value of 400 = 100A + # For IA VR configuration + register "enable_fast_vmode[VR_DOMAIN_IA]" = "1" + register "cep_enable[VR_DOMAIN_IA]" = "1" + register "fast_vmode_i_trip[VR_DOMAIN_IA]" = "264" # 66A + # For SA VR configuration + register "enable_fast_vmode[VR_DOMAIN_SA]" = "1" + register "cep_enable[VR_DOMAIN_SA]" = "1" + register "fast_vmode_i_trip[VR_DOMAIN_SA]" = "84" # 21A + device domain 0 on device ref igpu on end device ref dtt on end |