drm/amd/powerplay: implement interface to retrieve clock freq for renoir

implement smu12 get_clk_freq interface to get clock frequency like
MCLK/SCLK.
Signed-off-by: Xiaomeng Hou <Xiaomeng.Hou@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/smu_v12_0.h

@@ -75,6 +75,10 @@ int smu_v12_0_fini_smc_tables(struct smu_context *smu);
 
 int smu_v12_0_populate_smc_tables(struct smu_context *smu);
 
+int smu_v12_0_get_current_clk_freq(struct smu_context *smu,
+					  enum smu_clk_type clk_id,
+					  uint32_t *value);
+
 int smu_v12_0_get_dpm_ultimate_freq(struct smu_context *smu, enum smu_clk_type clk_type,
 						 uint32_t *min, uint32_t *max);
 

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

@@ -31,6 +31,9 @@
 #include "renoir_ppt.h"
 
 
+#define CLK_MAP(clk, index) \
+	[SMU_##clk] = {1, (index)}
+
 #define MSG_MAP(msg, index) \
 	[SMU_MSG_##msg] = {1, (index)}
 
@@ -104,6 +107,14 @@ static struct smu_12_0_cmn2aisc_mapping renoir_message_map[SMU_MSG_MAX_COUNT] =
 	MSG_MAP(SetHardMinFclkByFreq,           PPSMC_MSG_SetHardMinFclkByFreq),
 };
 
+static struct smu_12_0_cmn2aisc_mapping renoir_clk_map[SMU_CLK_COUNT] = {
+	CLK_MAP(GFXCLK, CLOCK_GFXCLK),
+	CLK_MAP(SCLK,	CLOCK_GFXCLK),
+	CLK_MAP(SOCCLK, CLOCK_SOCCLK),
+	CLK_MAP(UCLK, CLOCK_UMCCLK),
+	CLK_MAP(MCLK, CLOCK_UMCCLK),
+};
+
 static struct smu_12_0_cmn2aisc_mapping renoir_table_map[SMU_TABLE_COUNT] = {
 	TAB_MAP_VALID(WATERMARKS),
 	TAB_MAP_INVALID(CUSTOM_DPM),
@@ -125,6 +136,21 @@ static int renoir_get_smu_msg_index(struct smu_context *smc, uint32_t index)
 	return mapping.map_to;
 }
 
+static int renoir_get_smu_clk_index(struct smu_context *smc, uint32_t index)
+{
+	struct smu_12_0_cmn2aisc_mapping mapping;
+
+	if (index >= SMU_CLK_COUNT)
+		return -EINVAL;
+
+	mapping = renoir_clk_map[index];
+	if (!(mapping.valid_mapping)) {
+		return -EINVAL;
+	}
+
+	return mapping.map_to;
+}
+
 static int renoir_get_smu_table_index(struct smu_context *smc, uint32_t index)
 {
 	struct smu_12_0_cmn2aisc_mapping mapping;
@@ -352,6 +378,26 @@ static int renoir_dpm_set_jpeg_enable(struct smu_context *smu, bool enable)
 	return ret;
 }
 
+static int renoir_get_current_clk_freq_by_table(struct smu_context *smu,
+				       enum smu_clk_type clk_type,
+				       uint32_t *value)
+{
+	int ret = 0, clk_id = 0;
+	SmuMetrics_t metrics;
+
+	ret = renoir_get_metrics_table(smu, &metrics);
+	if (ret)
+		return ret;
+
+	clk_id = smu_clk_get_index(smu, clk_type);
+	if (clk_id < 0)
+		return clk_id;
+
+	*value = metrics.ClockFrequency[clk_id];
+
+	return ret;
+}
+
 static int renoir_force_dpm_limit_value(struct smu_context *smu, bool highest)
 {
 	int ret = 0, i = 0;
@@ -798,6 +844,7 @@ static int renoir_read_sensor(struct smu_context *smu,
 
 static const struct pptable_funcs renoir_ppt_funcs = {
 	.get_smu_msg_index = renoir_get_smu_msg_index,
+	.get_smu_clk_index = renoir_get_smu_clk_index,
 	.get_smu_table_index = renoir_get_smu_table_index,
 	.tables_init = renoir_tables_init,
 	.set_power_state = NULL,
@@ -806,6 +853,7 @@ static const struct pptable_funcs renoir_ppt_funcs = {
 	.get_current_power_state = renoir_get_current_power_state,
 	.dpm_set_uvd_enable = renoir_dpm_set_uvd_enable,
 	.dpm_set_jpeg_enable = renoir_dpm_set_jpeg_enable,
+	.get_current_clk_freq_by_table = renoir_get_current_clk_freq_by_table,
 	.force_dpm_limit_value = renoir_force_dpm_limit_value,
 	.unforce_dpm_levels = renoir_unforce_dpm_levels,
 	.get_workload_type = renoir_get_workload_type,
@@ -829,6 +877,7 @@ static const struct pptable_funcs renoir_ppt_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_current_clk_freq = smu_v12_0_get_current_clk_freq,
 	.get_dpm_ultimate_freq = smu_v12_0_get_dpm_ultimate_freq,
 	.mode2_reset = smu_v12_0_mode2_reset,
 	.set_soft_freq_limited_range = smu_v12_0_set_soft_freq_limited_range,

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

@@ -330,6 +330,26 @@ 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);
 }
 
+int smu_v12_0_get_current_clk_freq(struct smu_context *smu,
+					  enum smu_clk_type clk_id,
+					  uint32_t *value)
+{
+	int ret = 0;
+	uint32_t freq = 0;
+
+	if (clk_id >= SMU_CLK_COUNT || !value)
+		return -EINVAL;
+
+	ret = smu_get_current_clk_freq_by_table(smu, clk_id, &freq);
+	if (ret)
+		return ret;
+
+	freq *= 100;
+	*value = freq;
+
+	return ret;
+}
+
 int smu_v12_0_get_dpm_ultimate_freq(struct smu_context *smu, enum smu_clk_type clk_type,
 						 uint32_t *min, uint32_t *max)
 {