drm/amd/powerplay: add function to get thermal range

Add the function to get the min and max thermal value for vega20 with
smu11 architecture.
Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h

@@ -164,6 +164,7 @@ struct smu_table_context
 	struct smu_table		*tables;
 	uint32_t			table_count;
 	struct smu_table		memory_pool;
+	uint16_t                        software_shutdown_temp;
 };
 
 struct smu_dpm_context {

drivers/gpu/drm/amd/powerplay/smu_v11_0.c

@@ -31,6 +31,7 @@
 #include "soc15_common.h"
 #include "atom.h"
 #include "vega20_ppt.h"
+#include "pp_thermal.h"
 
 #include "asic_reg/thm/thm_11_0_2_offset.h"
 #include "asic_reg/thm/thm_11_0_2_sh_mask.h"
@@ -893,6 +894,17 @@ static int smu_v11_0_get_current_clk_freq(struct smu_context *smu, uint32_t clk_
 	return ret;
 }
 
+static int smu_v11_0_get_thermal_range(struct smu_context *smu,
+				struct PP_TemperatureRange *range)
+{
+	memcpy(range, &SMU7ThermalWithDelayPolicy[0], sizeof(struct PP_TemperatureRange));
+
+	range->max = smu->smu_table.software_shutdown_temp *
+		PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
+
+	return 0;
+}
+
 static const struct smu_funcs smu_v11_0_funcs = {
 	.init_microcode = smu_v11_0_init_microcode,
 	.load_microcode = smu_v11_0_load_microcode,

drivers/gpu/drm/amd/powerplay/vega20_ppt.c

@@ -159,6 +159,8 @@ static int vega20_store_powerplay_table(struct smu_context *smu)
 	memcpy(table_context->driver_pptable, &powerplay_table->smcPPTable,
 	       sizeof(PPTable_t));
 
+	table_context->software_shutdown_temp = powerplay_table->usSoftwareShutdownTemp;
+
 	return 0;
 }