Pstate: Remove legacy VDM code

- Remove legacy VDM code in preparation for actual VDM enablement commit
- VDM enablement only occurs during istep15
- Does not introduce any inter-platform dependencies

Change-Id: Ia46661f6133e2556bee0464a95c7109658a86beb
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40185
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Michael S. Floyd <mfloyd@us.ibm.com>
Reviewed-by: Brian T. Vanderpool <vanderp@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40221
Reviewed-by: Hostboot Team <hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>

2 files changed, 3 insertions, 10 deletions

diff --git a/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_chiplet_reset.C b/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_chiplet_reset.C
index 8ed88fbc..a9df9858 100644
--- a/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_chiplet_reset.C
+++ b/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_chiplet_reset.C
@@ -87,12 +87,10 @@ p9_hcd_core_chiplet_reset(
     FAPI_INF(">>p9_hcd_core_chiplet_reset");
     fapi2::buffer<uint64_t>                        l_data64;
     uint8_t                                        l_attr_dpll_bypass;
-    uint8_t                                        l_attr_vdm_enable;
     const fapi2::Target<fapi2::TARGET_TYPE_SYSTEM> l_sys;
     auto l_chip = i_target.getParent<fapi2::TARGET_TYPE_PROC_CHIP>();
 
     FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_DPLL_BYPASS, l_chip, l_attr_dpll_bypass));
-    FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_VDM_ENABLE,  l_sys,  l_attr_vdm_enable));
 
     //--------------------------
     // Reset core chiplet logic
@@ -186,13 +184,6 @@ p9_hcd_core_chiplet_reset(
                                                   p9hcd::SCAN0_TYPE_ALL_BUT_GPTR_REPR_TIME));
     }
 #endif
-
-    if (l_attr_vdm_enable == fapi2::ENUM_ATTR_VDM_ENABLE_ON)
-    {
-        FAPI_DBG("Assert vdm enable via CPPM_VDMCR[0]");
-        FAPI_TRY(putScom(i_target, C_PPM_VDMCR_OR, MASK_SET(0)));
-    }
-
     // content of p9_hcd_core_dcc_skewadjust below:
 
     FAPI_DBG("Drop core DCC bypass via NET_CTRL[1]");
diff --git a/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_stopclocks.C b/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_stopclocks.C
index 66a8ba66..892d3b45 100644
--- a/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_stopclocks.C
+++ b/src/import/chips/p9/procedures/hwp/core/p9_hcd_core_stopclocks.C
@@ -242,7 +242,9 @@ p9_hcd_core_stopclocks(
 
     if (l_attr_vdm_enable == fapi2::ENUM_ATTR_VDM_ENABLE_ON)
     {
-        FAPI_DBG("Drop vdm enable via CPPM_VDMCR[0]");
+        FAPI_DBG("Set VDM Disable via CPPM_VDMCR[1]");
+        FAPI_TRY(putScom(i_target, C_PPM_VDMCR_OR, MASK_SET(1)));
+        FAPI_DBG("Drop VDM Poweron via CPPM_VDMCR[0]");
         FAPI_TRY(putScom(i_target, C_PPM_VDMCR_CLEAR, MASK_SET(0)));
     }