diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
index 20ccbc73a8f7..d23dcce6c03c 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
@@ -98,6 +98,7 @@
 #define PCIE_BUS_CLK                10000
 #define TCLK                        (PCIE_BUS_CLK / 10)
 
+#define CEILING_UCHAR(double) ((double-(uint8_t)(double)) > 0 ? (uint8_t)(double+1) : (uint8_t)(double))
 
 static const uint16_t polaris10_clock_stretcher_lookup_table[2][4] =
 { {600, 1050, 3, 0}, {600, 1050, 6, 1} };
@@ -1787,20 +1788,27 @@ static int polaris10_populate_clock_stretcher_data_table(struct pp_hwmgr *hwmgr)
 
 	ro = efuse * (max -min)/255 + min;
 
-	/* Populate Sclk_CKS_masterEn0_7 and Sclk_voltageOffset */
+	/* Populate Sclk_CKS_masterEn0_7 and Sclk_voltageOffset
+	 * there is a little difference in calculating
+	 * volt_with_cks with windows */
 	for (i = 0; i < sclk_table->count; i++) {
 		data->smc_state_table.Sclk_CKS_masterEn0_7 |=
 				sclk_table->entries[i].cks_enable << i;
-
-		volt_without_cks =  (uint32_t)(((ro - 40) * 1000 - 2753594 - sclk_table->entries[i].clk/100 * 136418 /1000) / \
-					(sclk_table->entries[i].clk/100 * 1132925 /10000 - 242418)/100);
-
-		volt_with_cks = (uint32_t)((ro * 1000 -2396351 - sclk_table->entries[i].clk/100 * 329021/1000) / \
-				(sclk_table->entries[i].clk/10000 * 649434 /1000  - 18005)/10);
+		if (hwmgr->chip_id == CHIP_POLARIS10) {
+			volt_without_cks = (uint32_t)((2753594000 + (sclk_table->entries[i].clk/100) * 136418 -(ro - 70) * 1000000) / \
+						(2424180 - (sclk_table->entries[i].clk/100) * 1132925/1000));
+			volt_with_cks = (uint32_t)((279720200 + sclk_table->entries[i].clk * 3232 - (ro - 65) * 100000000) / \
+					(252248000 - sclk_table->entries[i].clk/100 * 115764));
+		} else {
+			volt_without_cks = (uint32_t)((2416794800 + (sclk_table->entries[i].clk/100) * 1476925/10 -(ro - 50) * 1000000) / \
+						(2625416 - (sclk_table->entries[i].clk/100) * 12586807/10000));
+			volt_with_cks = (uint32_t)((2999656000 + sclk_table->entries[i].clk * 392803/100 - (ro - 44) * 1000000) / \
+					(3422454 - sclk_table->entries[i].clk/100 * 18886376/10000));
+		}
 
 		if (volt_without_cks >= volt_with_cks)
-			volt_offset = (uint8_t)(((volt_without_cks - volt_with_cks +
-					sclk_table->entries[i].cks_voffset) * 100 / 625) + 1);
+			volt_offset = (uint8_t)CEILING_UCHAR((volt_without_cks - volt_with_cks +
+					sclk_table->entries[i].cks_voffset) * 100 / 625);
 
 		data->smc_state_table.Sclk_voltageOffset[i] = volt_offset;
 	}