drm/amd/powerplay: add the interface for getting ultimate frequency v3

add the get_dpm_ultimate_freq for supporting different swSMU.
-v2:
        Handle the unsupported clock type and read smc message failed case and return error code.
        Move the smu12 uclk frequency retrieved logic to renoir ppt.
-v3:
        Use goto clause to handle invalidate clk index.
        Add the limited tag for smu_get_dpm_uclk to avoid other likewise interface introduced.
Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -231,9 +231,8 @@ int smu_set_hard_freq_range(struct smu_context *smu, enum smu_clk_type clk_type,
 int smu_get_dpm_freq_range(struct smu_context *smu, enum smu_clk_type clk_type,
 			   uint32_t *min, uint32_t *max)
 {
-	int ret = 0, clk_id = 0;
-	uint32_t param = 0;
 	uint32_t clock_limit;
+	int ret = 0;
 
 	if (!min && !max)
 		return -EINVAL;
@@ -264,36 +263,11 @@ int smu_get_dpm_freq_range(struct smu_context *smu, enum smu_clk_type clk_type,
 
 		return 0;
 	}
-
-	mutex_lock(&smu->mutex);
-	clk_id = smu_clk_get_index(smu, clk_type);
-	if (clk_id < 0) {
-		ret = -EINVAL;
-		goto failed;
-	}
-
-	param = (clk_id & 0xffff) << 16;
-
-	if (max) {
-		ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetMaxDpmFreq, param);
-		if (ret)
-			goto failed;
-		ret = smu_read_smc_arg(smu, max);
-		if (ret)
-			goto failed;
-	}
-
-	if (min) {
-		ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetMinDpmFreq, param);
-		if (ret)
-			goto failed;
-		ret = smu_read_smc_arg(smu, min);
-		if (ret)
-			goto failed;
-	}
-
-failed:
-	mutex_unlock(&smu->mutex);
+	/*
+	 * Todo: Use each asic(ASIC_ppt funcs) control the callbacks exposed to the
+	 * core driver and then have helpers for stuff that is common(SMU_v11_x | SMU_v12_x funcs).
+	 */
+	ret = smu_get_dpm_ultimate_freq(smu, clk_type, min, max);
 	return ret;
 }
 

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

@@ -458,6 +458,7 @@ struct pptable_funcs {
 	int (*display_disable_memory_clock_switch)(struct smu_context *smu, bool disable_memory_clock_switch);
 	void (*dump_pptable)(struct smu_context *smu);
 	int (*get_power_limit)(struct smu_context *smu, uint32_t *limit, bool asic_default);
+	int (*get_dpm_uclk_limited)(struct smu_context *smu, uint32_t *clock, bool max);
 };
 
 struct smu_funcs
@@ -536,7 +537,7 @@ struct smu_funcs
 	enum smu_baco_state (*baco_get_state)(struct smu_context *smu);
 	int (*baco_set_state)(struct smu_context *smu, enum smu_baco_state state);
 	int (*baco_reset)(struct smu_context *smu);
-
+	int (*get_dpm_ultimate_freq)(struct smu_context *smu, enum smu_clk_type clk_type, uint32_t *min, uint32_t *max);
 };
 
 #define smu_init_microcode(smu) \
@@ -745,6 +746,10 @@ struct smu_funcs
 	((smu)->funcs->register_irq_handler ? (smu)->funcs->register_irq_handler(smu) : 0)
 #define smu_set_azalia_d3_pme(smu) \
 	((smu)->funcs->set_azalia_d3_pme ? (smu)->funcs->set_azalia_d3_pme((smu)) : 0)
+#define smu_get_dpm_ultimate_freq(smu, param, min, max) \
+		((smu)->funcs->get_dpm_ultimate_freq ? (smu)->funcs->get_dpm_ultimate_freq((smu), (param), (min), (max)) : 0)
+#define smu_get_uclk_dpm_states(smu, clocks_in_khz, num_states) \
+	((smu)->ppt_funcs->get_uclk_dpm_states ? (smu)->ppt_funcs->get_uclk_dpm_states((smu), (clocks_in_khz), (num_states)) : 0)
 #define smu_get_max_sustainable_clocks_by_dc(smu, max_clocks) \
 	((smu)->funcs->get_max_sustainable_clocks_by_dc ? (smu)->funcs->get_max_sustainable_clocks_by_dc((smu), (max_clocks)) : 0)
 #define smu_get_uclk_dpm_states(smu, clocks_in_khz, num_states) \
@@ -759,6 +764,9 @@ struct smu_funcs
 	((smu)->ppt_funcs->set_performance_level? (smu)->ppt_funcs->set_performance_level((smu), (level)) : -EINVAL);
 #define smu_dump_pptable(smu) \
 	((smu)->ppt_funcs->dump_pptable ? (smu)->ppt_funcs->dump_pptable((smu)) : 0)
+#define smu_get_dpm_uclk_limited(smu, clock, max) \
+		((smu)->ppt_funcs->get_dpm_uclk_limited ? (smu)->ppt_funcs->get_dpm_uclk_limited((smu), (clock), (max)) : -EINVAL)
+
 
 extern int smu_get_atom_data_table(struct smu_context *smu, uint32_t table,
 				   uint16_t *size, uint8_t *frev, uint8_t *crev,

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

@@ -156,11 +156,33 @@ static int renoir_tables_init(struct smu_context *smu, struct smu_table *tables)
 	return 0;
 }
 
+/**
+ * This interface just for getting uclk ultimate freq and should't introduce
+ * other likewise function result in overmuch callback.
+ */
+static int renoir_get_dpm_uclk_limited(struct smu_context *smu, uint32_t *clock, bool max)
+{
+
+	DpmClocks_t *table = smu->smu_table.clocks_table;
+
+	if (!clock || !table)
+		return -EINVAL;
+
+	if (max)
+		*clock = table->FClocks[NUM_FCLK_DPM_LEVELS-1].Freq;
+	else
+		*clock = table->FClocks[0].Freq;
+
+	return 0;
+
+}
+
 static const struct pptable_funcs renoir_ppt_funcs = {
 	.get_smu_msg_index = renoir_get_smu_msg_index,
 	.get_smu_table_index = renoir_get_smu_table_index,
 	.tables_init = renoir_tables_init,
 	.set_power_state = NULL,
+	.get_dpm_uclk_limited = renoir_get_dpm_uclk_limited,
 };
 
 void renoir_set_ppt_funcs(struct smu_context *smu)

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

@@ -1718,6 +1718,43 @@ static int smu_v11_0_baco_reset(struct smu_context *smu)
 	return ret;
 }
 
+static int smu_v11_0_get_dpm_ultimate_freq(struct smu_context *smu, enum smu_clk_type clk_type,
+						 uint32_t *min, uint32_t *max)
+{
+	int ret = 0, clk_id = 0;
+	uint32_t param = 0;
+
+	mutex_lock(&smu->mutex);
+	clk_id = smu_clk_get_index(smu, clk_type);
+	if (clk_id < 0) {
+		ret = -EINVAL;
+		goto failed;
+	}
+	param = (clk_id & 0xffff) << 16;
+
+	if (max) {
+		ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetMaxDpmFreq, param);
+		if (ret)
+			goto failed;
+		ret = smu_read_smc_arg(smu, max);
+		if (ret)
+			goto failed;
+	}
+
+	if (min) {
+		ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetMinDpmFreq, param);
+		if (ret)
+			goto failed;
+		ret = smu_read_smc_arg(smu, min);
+		if (ret)
+			goto failed;
+	}
+
+failed:
+	mutex_unlock(&smu->mutex);
+	return ret;
+}
+
 static const struct smu_funcs smu_v11_0_funcs = {
 	.init_microcode = smu_v11_0_init_microcode,
 	.load_microcode = smu_v11_0_load_microcode,
@@ -1767,6 +1804,7 @@ static const struct smu_funcs smu_v11_0_funcs = {
 	.baco_get_state = smu_v11_0_baco_get_state,
 	.baco_set_state = smu_v11_0_baco_set_state,
 	.baco_reset = smu_v11_0_baco_reset,
+	.get_dpm_ultimate_freq = smu_v11_0_get_dpm_ultimate_freq,
 };
 
 void smu_v11_0_set_smu_funcs(struct smu_context *smu)

drivers/gpu/drm/amd/powerplay/smu_v12_0.c

@@ -319,6 +319,67 @@ static int smu_v12_0_populate_smc_tables(struct smu_context *smu)
 	return smu_update_table(smu, SMU_TABLE_DPMCLOCKS, 0, smu_table->clocks_table, false);
 }
 
+static int smu_v12_0_get_dpm_ultimate_freq(struct smu_context *smu, enum smu_clk_type clk_type,
+						 uint32_t *min, uint32_t *max)
+{
+	int ret = 0;
+
+	mutex_lock(&smu->mutex);
+
+	if (max) {
+		switch (clk_type) {
+		case SMU_GFXCLK:
+		case SMU_SCLK:
+			ret = smu_send_smc_msg(smu, SMU_MSG_GetMaxGfxclkFrequency);
+			if (ret) {
+				pr_err("Attempt to get max GX frequency from SMC Failed !\n");
+				goto failed;
+			}
+			ret = smu_read_smc_arg(smu, max);
+			if (ret)
+				goto failed;
+			break;
+		case SMU_UCLK:
+			ret = smu_get_dpm_uclk_limited(smu, max, true);
+			if (ret)
+				goto failed;
+			break;
+		default:
+			ret = -EINVAL;
+			goto failed;
+
+		}
+	}
+
+	if (min) {
+		switch (clk_type) {
+		case SMU_GFXCLK:
+		case SMU_SCLK:
+			ret = smu_send_smc_msg(smu, SMU_MSG_GetMinGfxclkFrequency);
+			if (ret) {
+				pr_err("Attempt to get min GX frequency from SMC Failed !\n");
+				goto failed;
+			}
+			ret = smu_read_smc_arg(smu, min);
+			if (ret)
+				goto failed;
+			break;
+		case SMU_UCLK:
+			ret = smu_get_dpm_uclk_limited(smu, min, false);
+			if (ret)
+				goto failed;
+			break;
+		default:
+			ret = -EINVAL;
+			goto failed;
+		}
+
+	}
+failed:
+	mutex_unlock(&smu->mutex);
+	return ret;
+}
+
 static const struct smu_funcs smu_v12_0_funcs = {
 	.check_fw_status = smu_v12_0_check_fw_status,
 	.check_fw_version = smu_v12_0_check_fw_version,
@@ -332,6 +393,7 @@ static const struct smu_funcs smu_v12_0_funcs = {
 	.init_smc_tables = smu_v12_0_init_smc_tables,
 	.fini_smc_tables = smu_v12_0_fini_smc_tables,
 	.populate_smc_tables = smu_v12_0_populate_smc_tables,
+	.get_dpm_ultimate_freq = smu_v12_0_get_dpm_ultimate_freq,
 };
 
 void smu_v12_0_set_smu_funcs(struct smu_context *smu)