drm/amd/pm: Use cached data for min/max clocks

If dpm tables are already populated on SMU v13.0.6 SOCs, use the cached
data. Otherwise, fetch values from firmware.

Signed-off-by: Lijo Lazar <[email protected]>
Reviewed-by: Asad Kamal <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Lijo Lazar

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

@@ -881,51 +881,51 @@ static int smu_v13_0_6_get_dpm_ultimate_freq(struct smu_context *smu,
 					     enum smu_clk_type clk_type,
 					     uint32_t *min, uint32_t *max)
 {
+	struct smu_13_0_dpm_context *dpm_context = smu->smu_dpm.dpm_context;
 	struct smu_table_context *smu_table = &smu->smu_table;
 	struct PPTable_t *pptable =
 		(struct PPTable_t *)smu_table->driver_pptable;
-	uint32_t clock_limit = 0, param;
+	struct smu_13_0_dpm_table *dpm_table;
+	uint32_t min_clk, max_clk, param;
 	int ret = 0, clk_id = 0;
 
-	if (!smu_cmn_clk_dpm_is_enabled(smu, clk_type)) {
+	/* Use dpm tables, if data is already fetched */
+	if (pptable->Init) {
 		switch (clk_type) {
 		case SMU_MCLK:
 		case SMU_UCLK:
-			if (pptable->Init)
-				clock_limit = pptable->UclkFrequencyTable[0];
+			dpm_table = &dpm_context->dpm_tables.uclk_table;
 			break;
 		case SMU_GFXCLK:
 		case SMU_SCLK:
-			if (pptable->Init)
-				clock_limit = pptable->MinGfxclkFrequency;
+			dpm_table = &dpm_context->dpm_tables.gfx_table;
 			break;
 		case SMU_SOCCLK:
-			if (pptable->Init)
-				clock_limit = pptable->SocclkFrequencyTable[0];
+			dpm_table = &dpm_context->dpm_tables.soc_table;
 			break;
 		case SMU_FCLK:
-			if (pptable->Init)
-				clock_limit = pptable->FclkFrequencyTable[0];
+			dpm_table = &dpm_context->dpm_tables.fclk_table;
 			break;
 		case SMU_VCLK:
-			if (pptable->Init)
-				clock_limit = pptable->VclkFrequencyTable[0];
+			dpm_table = &dpm_context->dpm_tables.vclk_table;
 			break;
 		case SMU_DCLK:
-			if (pptable->Init)
-				clock_limit = pptable->DclkFrequencyTable[0];
+			dpm_table = &dpm_context->dpm_tables.dclk_table;
 			break;
 		default:
-			break;
+			return -EINVAL;
 		}
 
-		if (min)
-			*min = clock_limit;
+		min_clk = dpm_table->min;
+		max_clk = dpm_table->max;
 
+		if (min)
+			*min = min_clk;
 		if (max)
-			*max = clock_limit;
+			*max = max_clk;
 
-		return 0;
+		if (min_clk && max_clk)
+			return 0;
 	}
 
 	if (!(clk_type == SMU_GFXCLK || clk_type == SMU_SCLK)) {