drm/amd/pm: Update pci link width for smu v13.0.6

Update addresses of PCIE link width registers,
& link width format used to populate gpu metrics
table for smu v13.0.6

v2:
Removed ESM register update

v3:
Updated patch subject and message

Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Asad Kamal

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c

@@ -81,9 +81,10 @@
 #define EPSILON 1
 
 #define smnPCIE_ESM_CTRL 0x193D0
-#define smnPCIE_LC_LINK_WIDTH_CNTL 0x1ab40288
+#define smnPCIE_LC_LINK_WIDTH_CNTL 0x1a340288
 #define PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD_MASK 0x00000070L
 #define PCIE_LC_LINK_WIDTH_CNTL__LC_LINK_WIDTH_RD__SHIFT 0x4
+#define MAX_LINK_WIDTH 6
 
 static const struct cmn2asic_msg_mapping smu_v13_0_6_message_map[SMU_MSG_MAX_COUNT] = {
 	MSG_MAP(TestMessage,			     PPSMC_MSG_TestMessage,			0),
@@ -1969,6 +1970,7 @@ static ssize_t smu_v13_0_6_get_gpu_metrics(struct smu_context *smu, void **table
 	struct amdgpu_device *adev = smu->adev;
 	int ret = 0, inst0, xcc0;
 	MetricsTable_t *metrics;
+	u16 link_width_level;
 
 	inst0 = adev->sdma.instance[0].aid_id;
 	xcc0 = GET_INST(GC, 0);
@@ -2019,8 +2021,12 @@ static ssize_t smu_v13_0_6_get_gpu_metrics(struct smu_context *smu, void **table
 	gpu_metrics->throttle_status = 0;
 
 	if (!(adev->flags & AMD_IS_APU)) {
+		link_width_level = smu_v13_0_6_get_current_pcie_link_width_level(smu);
+		if (link_width_level > MAX_LINK_WIDTH)
+			link_width_level = 0;
+
 		gpu_metrics->pcie_link_width =
-			smu_v13_0_6_get_current_pcie_link_width_level(smu);
+			DECODE_LANE_WIDTH(link_width_level);
 		gpu_metrics->pcie_link_speed =
 			smu_v13_0_6_get_current_pcie_link_speed(smu);
 	}