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authorTimothy Pearson <tpearson@raptorengineering.com>2018-04-24 21:13:30 -0500
committerRaptor Engineering Development Team <support@raptorengineering.com>2018-04-30 03:59:04 -0500
commite36ec63e58344f854317e79d060f2ab9108103c2 (patch)
tree5417b6dcde8357ee8243ee1ec3aed886810342e1
parente5b2b878653494ba4c94c8db2e6bb4c1e3302f3e (diff)
downloadtalos-hostboot-04-30-2018.zip
talos-hostboot-04-30-2018.tar.gz
Cap voltage offset when biased04-30-2018
This fixes spurious (invalid) voltage requests when the bias frequency exceeds the maximum WoF frequency Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
-rw-r--r--src/import/chips/p9/procedures/hwp/pm/p9_pstate_parameter_block.C8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/import/chips/p9/procedures/hwp/pm/p9_pstate_parameter_block.C b/src/import/chips/p9/procedures/hwp/pm/p9_pstate_parameter_block.C
index 02b7cb3..f446493 100644
--- a/src/import/chips/p9/procedures/hwp/pm/p9_pstate_parameter_block.C
+++ b/src/import/chips/p9/procedures/hwp/pm/p9_pstate_parameter_block.C
@@ -4866,11 +4866,15 @@ uint32_t ps2v_mv(const Pstate i_pstate,
FAPI_INF ("l_SlopeValue %x",l_SlopeValue);
- uint32_t x = (l_SlopeValue * (-i_pstate + i_operating_points[region_start].pstate));
+ int32_t x_candidate = (l_SlopeValue * (-i_pstate + i_operating_points[region_start].pstate));
+ uint32_t x = 0;
uint32_t y = x >> VID_SLOPE_FP_SHIFT_12;
+ if (x_candidate > 0)
+ x = x_candidate;
+
uint32_t l_vdd =
- (((l_SlopeValue * (-i_pstate + i_operating_points[region_start].pstate)) >> VID_SLOPE_FP_SHIFT_12)
+ ((x >> VID_SLOPE_FP_SHIFT_12)
+ revle32(i_operating_points[region_start].vdd_mv));
// Round up
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