[coreboot-gerrit] Patch set updated for coreboot: mainboard/google/reef: Set PL1 override to 12000mW
Venkateswarlu V Vinjamuri (venkateswarlu.v.vinjamuri@intel.com)
gerrit at coreboot.org
Sat Oct 15 00:57:40 CEST 2016
Venkateswarlu V Vinjamuri (venkateswarlu.v.vinjamuri at intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17029
-gerrit
commit 08e926354c105a4f29fd86094c7df13dd90b4542
Author: Venkateswarlu Vinjamuri <venkateswarlu.v.vinjamuri at intel.com>
Date: Fri Oct 14 15:29:33 2016 -0700
mainboard/google/reef: Set PL1 override to 12000mW
Reef is using APL SoC SKU's with 6W TDP max. We've done
experiments and found the energy calculation is wrong with
the current VR solution. Experiments show that SoC TDP max
(6W) can be reached when RAPL PL1 is set to 12W. Therefore,
we've inserted 12W override after reading the fused value (6W)
so that the system can reach the right performance level.
BUG=chrome-os-partner:56922
TEST=webGL performance(fps) not impacted before and after S3.
Signed-off-by: Venkateswarlu Vinjamuri <venkateswarlu.v.vinjamuri at intel.com>
Change-Id: I21c278e82b82d805f6925f4d9c82187825fd0aa0
---
src/mainboard/google/reef/variants/baseboard/devicetree.cb | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/mainboard/google/reef/variants/baseboard/devicetree.cb b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
index 989acd9..f393019 100644
--- a/src/mainboard/google/reef/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
@@ -49,6 +49,11 @@ chip soc/intel/apollolake
# Enable DPTF
register "dptf_enable" = "1"
+ # PL1 override 12000 mW: the energy calculation is wrong with the
+ # current VR solution. Experiments show that SoC TDP max (6W) can
+ # be reached when RAPL PL1 is set to 12W.
+ register "tdp_pl1_override_mw" = "12000"
+
# Enable Audio Clock and Power gating
register "hdaudio_clk_gate_enable" = "1"
register "hdaudio_pwr_gate_enable" = "1"
More information about the coreboot-gerrit
mailing list