nocturne: configure VR per Intel recommendation
These values are Intel recommended.
IccMax = 28A
DC and AC LL = 4mOhms
Pl2 = 18w
BUG=b:79666828
BRANCH=none
TEST=Enabled p-states with patch
Change-Id:I82d1516998cc26b789faa5d4e897feb06dc06020 and then
"emerge-nocturne depthcharge coreboot chromeos-bootimage", flash spi
image onto nocturne, boot to kernel and verify device stays alive and
responsive for several minutes without locking up.
Change-Id: I4c67c6a095aecc158e529a6b393baf03ec358a3d
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/27175
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
index 32d4f55..235391e 100644
--- a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
@@ -62,7 +62,7 @@
# Set speed_shift_enable to 1 to enable P-States, and 0 to disable
register "speed_shift_enable" = "1"
register "dptf_enable" = "1"
- register "tdp_pl2_override" = "15"
+ register "tdp_pl2_override" = "18"
register "psys_pmax" = "45"
register "tcc_offset" = "10"
register "pch_trip_temp" = "75"
@@ -87,10 +87,10 @@
#| Psi4Enable | 1 | 1 | 1 | 1 |
#| ImonSlope | 0 | 0 | 0 | 0 |
#| ImonOffset | 0 | 0 | 0 | 0 |
- #| IccMax | 4A | 24A | 24A | 24A |
+ #| IccMax | 4A | 28A | 24A | 24A |
#| VrVoltageLimit | 1.52V | 1.52V | 1.52V | 1.52V |
- #| AcLoadline | 14.9 | 5 | 5.7 | 4.57 |
- #| DcLoadline | 14.2 | 4.86 | 4.2 | 4.3 |
+ #| AcLoadline | 14.9 | 4 | 5.7 | 4.57 |
+ #| DcLoadline | 14.2 | 4 | 4.2 | 4.3 |
#+----------------+-------+-------+-------+-------+
register "domain_vr_config[VR_SYSTEM_AGENT]" = "{
.vr_config_enable = 1,
@@ -116,10 +116,10 @@
.psi4enable = 1,
.imon_slope = 0x0,
.imon_offset = 0x0,
- .icc_max = VR_CFG_AMP(24),
+ .icc_max = VR_CFG_AMP(28),
.voltage_limit = 1520,
- .ac_loadline = 500,
- .dc_loadline = 486,
+ .ac_loadline = 400,
+ .dc_loadline = 400,
}"
register "domain_vr_config[VR_GT_UNSLICED]" = "{