drm/amd/powerplay: Workaround for Memory EDC Error on Polaris10.

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

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
index d23dcce..d15584c 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
@@ -2924,6 +2924,31 @@ static int polaris10_set_private_data_based_on_pptable(struct pp_hwmgr *hwmgr)
        return 0;
 }
 
+int polaris10_patch_voltage_workaround(struct pp_hwmgr *hwmgr)
+{
+       struct phm_ppt_v1_information *table_info =
+                      (struct phm_ppt_v1_information *)(hwmgr->pptable);
+       struct phm_ppt_v1_clock_voltage_dependency_table *dep_mclk_table =
+                       table_info->vdd_dep_on_mclk;
+       struct phm_ppt_v1_voltage_lookup_table *lookup_table =
+                       table_info->vddc_lookup_table;
+       uint32_t i;
+
+       if (hwmgr->chip_id == CHIP_POLARIS10 && hwmgr->hw_revision == 0xC7) {
+               if (lookup_table->entries[dep_mclk_table->entries[dep_mclk_table->count-1].vddInd].us_vdd >= 1000)
+                       return 0;
+
+               for (i = 0; i < lookup_table->count; i++) {
+                       if (lookup_table->entries[i].us_vdd < 0xff01 && lookup_table->entries[i].us_vdd >= 1000) {
+                               dep_mclk_table->entries[dep_mclk_table->count-1].vddInd = (uint8_t) i;
+                               return 0;
+                       }
+               }
+       }
+       return 0;
+}
+
+
 int polaris10_hwmgr_backend_init(struct pp_hwmgr *hwmgr)
 {
        struct polaris10_hwmgr *data = (struct polaris10_hwmgr *)(hwmgr->backend);
@@ -3001,6 +3026,7 @@ int polaris10_hwmgr_backend_init(struct pp_hwmgr *hwmgr)
 
        polaris10_set_features_platform_caps(hwmgr);
 
+       polaris10_patch_voltage_workaround(hwmgr);
        polaris10_init_dpm_defaults(hwmgr);
 
        /* Get leakage voltage based on leakage ID. */