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| author | Timothy Pearson <tpearson@raptorengineering.com> | 2018-04-24 21:13:30 -0500 |
|---|---|---|
| committer | Raptor Engineering Development Team <support@raptorengineering.com> | 2019-04-21 08:20:38 +0000 |
| commit | 48fd8c4fef309b6ddb3c96c8d128558203d901ca (patch) | |
| tree | dfbb626bdfd7f51178d0eecbc6e9230ebbba2e2e | |
| parent | 1e1ea69fbf6036d9937071c8ecb70830bd45b188 (diff) | |
| download | talos-hostboot-48fd8c4fef309b6ddb3c96c8d128558203d901ca.tar.gz talos-hostboot-48fd8c4fef309b6ddb3c96c8d128558203d901ca.zip | |
Cap voltage offset when biased
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.C | 8 |
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 87f78debf..cedb6d1eb 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 @@ -1748,11 +1748,15 @@ uint32_t PlatPmPPB::ps2v_mv(const Pstate i_pstate) FAPI_INF ("l_SlopeValue %x",l_SlopeValue); - uint32_t x = (l_SlopeValue * (-i_pstate + iv_operating_points[VPD_PT_SET_BIASED_SYSP][region_start].pstate)); + int32_t x_candidate = (l_SlopeValue * (-i_pstate + iv_operating_points[VPD_PT_SET_BIASED_SYSP][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 + iv_operating_points[VPD_PT_SET_BIASED_SYSP][region_start].pstate)) >> VID_SLOPE_FP_SHIFT_12) + ((x >> VID_SLOPE_FP_SHIFT_12) + (iv_operating_points[VPD_PT_SET_BIASED_SYSP][region_start].vdd_mv)); // Round up |
