drm/amd/powerplay: add function get current clock freq interface for navi10

add function of get_current_clk_freq_by_table for navi10.
Signed-off-by: Kevin Wang <kevin1.wang@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

@@ -589,6 +589,9 @@ struct pptable_funcs {
 					    uint32_t *value);
 	int (*set_watermarks_table)(struct smu_context *smu, void *watermarks,
 				    struct dm_pp_wm_sets_with_clock_ranges_soc15 *clock_ranges);
+	int (*get_current_clk_freq_by_table)(struct smu_context *smu,
+					     enum smu_clk_type clk_type,
+					     uint32_t *value);
 };
 
 struct smu_funcs
@@ -881,6 +884,8 @@ struct smu_funcs
 	((smu)->ppt_funcs->get_ppfeature_status ? (smu)->ppt_funcs->get_ppfeature_status((smu), (buf)) : -EINVAL)
 #define smu_set_watermarks_table(smu, tab, clock_ranges) \
 	((smu)->ppt_funcs->set_watermarks_table ? (smu)->ppt_funcs->set_watermarks_table((smu), (tab), (clock_ranges)) : 0)
+#define smu_get_current_clk_freq_by_table(smu, clk_type, value) \
+	((smu)->ppt_funcs->get_current_clk_freq_by_table ? (smu)->ppt_funcs->get_current_clk_freq_by_table((smu), (clk_type), (value)) : 0)
 
 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/navi10_ppt.c

@@ -500,6 +500,29 @@ static int navi10_dpm_set_uvd_enable(struct smu_context *smu, bool enable)
 	return 0;
 }
 
+static int navi10_get_current_clk_freq_by_table(struct smu_context *smu,
+				       enum smu_clk_type clk_type,
+				       uint32_t *value)
+{
+	static SmuMetrics_t metrics = {0};
+	int ret = 0, clk_id = 0;
+
+	if (!value)
+		return -EINVAL;
+
+	ret = smu_update_table(smu, SMU_TABLE_SMU_METRICS, (void *)&metrics, false);
+	if (ret)
+		return ret;
+
+	clk_id = smu_clk_get_index(smu, clk_type);
+	if (clk_id < 0)
+		return clk_id;
+
+	*value = metrics.CurrClock[clk_id];
+
+	return ret;
+}
+
 static const struct pptable_funcs navi10_ppt_funcs = {
 	.tables_init = navi10_tables_init,
 	.alloc_dpm_context = navi10_allocate_dpm_context,
@@ -514,6 +537,7 @@ static const struct pptable_funcs navi10_ppt_funcs = {
 	.get_allowed_feature_mask = navi10_get_allowed_feature_mask,
 	.set_default_dpm_table = navi10_set_default_dpm_table,
 	.dpm_set_uvd_enable = navi10_dpm_set_uvd_enable,
+	.get_current_clk_freq_by_table = navi10_get_current_clk_freq_by_table,
 };
 
 void navi10_set_ppt_funcs(struct smu_context *smu)

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

@@ -1084,6 +1084,10 @@ static int smu_v11_0_get_current_clk_freq(struct smu_context *smu,
 	if (clk_id >= SMU_CLK_COUNT || !value)
 		return -EINVAL;
 
+	/* if don't has GetDpmClockFreq Message, try get current clock by SmuMetrics_t */
+	if (smu_msg_get_index(smu, SMU_MSG_GetDpmClockFreq) == 0)
+		return smu_get_current_clk_freq_by_table(smu, clk_id, value);
+
 	ret = smu_send_smc_msg_with_param(smu, SMU_MSG_GetDpmClockFreq,
 					  (smu_clk_get_index(smu, clk_id) << 16));
 	if (ret)