drm/amd/pm: correct the pcie link state check for SMU13

commit b9a24d8 upstream.

Update the driver implementations to fit those data exposed
by PMFW.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/gpu/drm/amd/pm/swsmu/inc/smu_v13_0.h

@@ -61,6 +61,12 @@
 #define CTF_OFFSET_HOTSPOT		5
 #define CTF_OFFSET_MEM			5
 
+static const int pmfw_decoded_link_speed[5] = {1, 2, 3, 4, 5};
+static const int pmfw_decoded_link_width[7] = {0, 1, 2, 4, 8, 12, 16};
+
+#define DECODE_GEN_SPEED(gen_speed_idx)		(pmfw_decoded_link_speed[gen_speed_idx])
+#define DECODE_LANE_WIDTH(lane_width_idx)	(pmfw_decoded_link_width[lane_width_idx])
+
 struct smu_13_0_max_sustainable_clocks {
 	uint32_t display_clock;
 	uint32_t phy_clock;

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c

@@ -1125,8 +1125,8 @@ static int smu_v13_0_0_print_clk_levels(struct smu_context *smu,
 					(pcie_table->pcie_lane[i] == 5) ? "x12" :
 					(pcie_table->pcie_lane[i] == 6) ? "x16" : "",
 					pcie_table->clk_freq[i],
-					((gen_speed - 1) == pcie_table->pcie_gen[i]) &&
-					(lane_width == link_width[pcie_table->pcie_lane[i]]) ?
+					(gen_speed == DECODE_GEN_SPEED(pcie_table->pcie_gen[i])) &&
+					(lane_width == DECODE_LANE_WIDTH(link_width[pcie_table->pcie_lane[i]])) ?
 					"*" : "");
 		break;
 

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c

@@ -1074,8 +1074,8 @@ static int smu_v13_0_7_print_clk_levels(struct smu_context *smu,
 					(pcie_table->pcie_lane[i] == 5) ? "x12" :
 					(pcie_table->pcie_lane[i] == 6) ? "x16" : "",
 					pcie_table->clk_freq[i],
-					(gen_speed == pcie_table->pcie_gen[i]) &&
-					(lane_width == pcie_table->pcie_lane[i]) ?
+					(gen_speed == DECODE_GEN_SPEED(pcie_table->pcie_gen[i])) &&
+					(lane_width == DECODE_LANE_WIDTH(pcie_table->pcie_lane[i])) ?
 					"*" : "");
 		break;