Attention is currently required from: Kapil Porwal, Tarun Tuli.
Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/75763?usp=email )
Change subject: mb/google/rex: Set FVM configuration for MTL-U 15W ......................................................................
mb/google/rex: Set FVM configuration for MTL-U 15W
This patch sets the FVM configuration parameter as suggested in Intel doc 640982. As per the doc, Intel MTL-U 15W CPU supports FVM on IA and SA.
The baseline Icc max for IA is 72A and 35A 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 --- M src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb 1 file changed, 11 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/63/75763/1
diff --git a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb index bd5b0bb..be66485 100644 --- a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb +++ b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb @@ -67,6 +67,17 @@ 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]" = "288" # 72A + # 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]" = "140" # 35A + device domain 0 on device ref igpu on end device ref dtt on end