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authorVenkateswarlu Vinjamuri <venkateswarlu.v.vinjamuri@intel.com>2016-10-14 15:29:33 -0700
committerAaron Durbin <adurbin@chromium.org>2016-10-16 02:52:15 +0200
commit63583f09872e26edb80fd891547d128abe4c6df9 (patch)
treed0a1cdceb9c5f497bad2ba93d6bf6e06602d69f2 /src/mainboard/google
parenta247d8e53cebbd754e46f76412ed9d17df752308 (diff)
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@intel.com> Change-Id: I21c278e82b82d805f6925f4d9c82187825fd0aa0 Reviewed-on: https://review.coreboot.org/17029 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/mainboard/google')
-rw-r--r--src/mainboard/google/reef/variants/baseboard/devicetree.cb5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mainboard/google/reef/variants/baseboard/devicetree.cb b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
index 989acd9d25..f393019737 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"