drm/amd/pp: Add PCC feature support on Vega

This features controls vega peak current protection to allow
for a wider compatibility with power supplies.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 36 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
index 26a5bc070989..1596fd84627a 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
@@ -299,6 +299,8 @@ static void vega10_init_dpm_defaults(struct pp_hwmgr *hwmgr)
 {
         struct vega10_hwmgr *data = (struct vega10_hwmgr *)(hwmgr->backend);
         int i;
+        uint32_t sub_vendor_id, hw_revision;
+        struct amdgpu_device *adev = hwmgr->adev;
 
         vega10_initialize_power_tune_defaults(hwmgr);
 
@@ -363,6 +365,7 @@ static void vega10_init_dpm_defaults(struct pp_hwmgr *hwmgr)
                         FEATURE_FAN_CONTROL_BIT;
         data->smu_features[GNLD_ACG].smu_feature_id = FEATURE_ACG_BIT;
         data->smu_features[GNLD_DIDT].smu_feature_id = FEATURE_GFX_EDC_BIT;
+        data->smu_features[GNLD_PCC_LIMIT].smu_feature_id = FEATURE_PCC_LIMIT_CONTROL_BIT;
 
         if (!data->registry_data.prefetcher_dpm_key_disabled)
                 data->smu_features[GNLD_DPM_PREFETCHER].supported = true;
@@ -432,6 +435,15 @@ static void vega10_init_dpm_defaults(struct pp_hwmgr *hwmgr)
         if (data->registry_data.didt_support)
                 data->smu_features[GNLD_DIDT].supported = true;
 
+        hw_revision = adev->pdev->revision;
+        sub_vendor_id = adev->pdev->subsystem_vendor;
+
+        if ((hwmgr->chip_id == 0x6862 ||
+                hwmgr->chip_id == 0x6861 ||
+                hwmgr->chip_id == 0x6868) &&
+                (hw_revision == 0) &&
+                (sub_vendor_id != 0x1002))
+                data->smu_features[GNLD_PCC_LIMIT].supported = true;
 }
 
 #ifdef PPLIB_VEGA10_EVV_SUPPORT
@@ -2844,12 +2856,32 @@ static int vega10_start_dpm(struct pp_hwmgr *hwmgr, uint32_t bitmap)
         return 0;
 }
 
+static int vega10_enable_disable_PCC_limit_feature(struct pp_hwmgr *hwmgr, bool enable)
+{
+        struct vega10_hwmgr *data =
+                        (struct vega10_hwmgr *)(hwmgr->backend);
+
+        if (data->smu_features[GNLD_PCC_LIMIT].supported) {
+                if (enable == data->smu_features[GNLD_PCC_LIMIT].enabled)
+                        pr_info("GNLD_PCC_LIMIT has been %s \n", enable ? "enabled" : "disabled");
+                PP_ASSERT_WITH_CODE(!vega10_enable_smc_features(hwmgr,
+                                enable, data->smu_features[GNLD_PCC_LIMIT].smu_feature_bitmap),
+                                "Attempt to Enable PCC Limit feature Failed!",
+                                return -EINVAL);
+                data->smu_features[GNLD_PCC_LIMIT].enabled = enable;
+        }
+
+        return 0;
+}
+
 static int vega10_enable_dpm_tasks(struct pp_hwmgr *hwmgr)
 {
         struct vega10_hwmgr *data =
                         (struct vega10_hwmgr *)(hwmgr->backend);
         int tmp_result, result = 0;
 
+        vega10_enable_disable_PCC_limit_feature(hwmgr, true);
+
         if ((hwmgr->smu_version == 0x001c2c00) ||
                         (hwmgr->smu_version == 0x001c2d00))
                 smum_send_msg_to_smc_with_parameter(hwmgr,
@@ -4703,6 +4735,8 @@ static int vega10_disable_dpm_tasks(struct pp_hwmgr *hwmgr)
         tmp_result =  vega10_acg_disable(hwmgr);
         PP_ASSERT_WITH_CODE((tmp_result == 0),
                         "Failed to disable acg!", result = tmp_result);
+
+        vega10_enable_disable_PCC_limit_feature(hwmgr, false);
         return result;
 }
 
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.h b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.h
index ab3e8798bee8..de3219fff2db 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.h
@@ -66,6 +66,7 @@ enum {
         GNLD_FEATURE_FAST_PPT_BIT,
         GNLD_DIDT,
         GNLD_ACG,
+        GNLD_PCC_LIMIT,
         GNLD_FEATURES_MAX
 };
 
diff --git a/drivers/gpu/drm/amd/powerplay/inc/vega10_ppsmc.h b/drivers/gpu/drm/amd/powerplay/inc/vega10_ppsmc.h
index 247c97397a27..c3ed737ab951 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/vega10_ppsmc.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/vega10_ppsmc.h
@@ -131,6 +131,7 @@ typedef uint16_t PPSMC_Result;
 #define PPSMC_MSG_RunAcgInOpenLoop               0x5E
 #define PPSMC_MSG_InitializeAcg                  0x5F
 #define PPSMC_MSG_GetCurrPkgPwr                  0x61
+#define PPSMC_MSG_SetPccThrottleLevel            0x67
 #define PPSMC_MSG_UpdatePkgPwrPidAlpha           0x68
 #define PPSMC_Message_Count                      0x69