drm/amd/powerplay: add interface to get current clocks for display

This patch fills the amd_pp_clock_info data for display, it will get the current
info in that structure.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Kevin Wang <Kevin1.Wang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c

@@ -497,6 +497,8 @@ bool dm_pp_get_static_clocks(
 		ret = adev->powerplay.pp_funcs->get_current_clocks(
 			adev->powerplay.pp_handle,
 			&pp_clk_info);
+	else if (adev->smu.funcs)
+		ret = smu_get_current_clocks(&adev->smu, &pp_clk_info);
 	if (ret)
 		return false;
 

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

@@ -814,6 +814,84 @@ int smu_display_configuration_change(struct smu_context *smu,
 	return 0;
 }
 
+static int smu_get_clock_info(struct smu_context *smu,
+			      struct smu_clock_info *clk_info,
+			      enum smu_perf_level_designation designation)
+{
+	int ret;
+	struct smu_performance_level level = {0};
+
+	if (!clk_info)
+		return -EINVAL;
+
+	ret = smu_get_perf_level(smu, PERF_LEVEL_ACTIVITY, &level);
+	if (ret)
+		return -EINVAL;
+
+	clk_info->min_mem_clk = level.memory_clock;
+	clk_info->min_eng_clk = level.core_clock;
+	clk_info->min_bus_bandwidth = level.non_local_mem_freq * level.non_local_mem_width;
+
+	ret = smu_get_perf_level(smu, designation, &level);
+	if (ret)
+		return -EINVAL;
+
+	clk_info->min_mem_clk = level.memory_clock;
+	clk_info->min_eng_clk = level.core_clock;
+	clk_info->min_bus_bandwidth = level.non_local_mem_freq * level.non_local_mem_width;
+
+	return 0;
+}
+
+int smu_get_current_clocks(struct smu_context *smu,
+			   struct amd_pp_clock_info *clocks)
+{
+	struct amd_pp_simple_clock_info simple_clocks = {0};
+	struct smu_clock_info hw_clocks;
+	int ret = 0;
+
+	if (!is_support_sw_smu(smu->adev))
+		return -EINVAL;
+
+	mutex_lock(&smu->mutex);
+
+	smu_get_dal_power_level(smu, &simple_clocks);
+
+	if (smu->support_power_containment)
+		ret = smu_get_clock_info(smu, &hw_clocks,
+					 PERF_LEVEL_POWER_CONTAINMENT);
+	else
+		ret = smu_get_clock_info(smu, &hw_clocks, PERF_LEVEL_ACTIVITY);
+
+	if (ret) {
+		pr_err("Error in smu_get_clock_info\n");
+		goto failed;
+	}
+
+	clocks->min_engine_clock = hw_clocks.min_eng_clk;
+	clocks->max_engine_clock = hw_clocks.max_eng_clk;
+	clocks->min_memory_clock = hw_clocks.min_mem_clk;
+	clocks->max_memory_clock = hw_clocks.max_mem_clk;
+	clocks->min_bus_bandwidth = hw_clocks.min_bus_bandwidth;
+	clocks->max_bus_bandwidth = hw_clocks.max_bus_bandwidth;
+	clocks->max_engine_clock_in_sr = hw_clocks.max_eng_clk;
+	clocks->min_engine_clock_in_sr = hw_clocks.min_eng_clk;
+
+        if (simple_clocks.level == 0)
+                clocks->max_clocks_state = PP_DAL_POWERLEVEL_7;
+        else
+                clocks->max_clocks_state = simple_clocks.level;
+
+        if (!smu_get_current_shallow_sleep_clocks(smu, &hw_clocks)) {
+                clocks->max_engine_clock_in_sr = hw_clocks.max_eng_clk;
+                clocks->min_engine_clock_in_sr = hw_clocks.min_eng_clk;
+        }
+
+failed:
+	mutex_unlock(&smu->mutex);
+	return ret;
+}
+
 static int smu_set_clockgating_state(void *handle,
 				     enum amd_clockgating_state state)
 {

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

@@ -233,6 +233,8 @@ struct smu_context
 
 	uint32_t power_limit;
 	uint32_t default_power_limit;
+
+	bool support_power_containment;
 };
 
 struct pptable_funcs {
@@ -465,5 +467,7 @@ enum amd_pm_state_type smu_get_current_power_state(struct smu_context *smu);
 extern int smu_display_configuration_change(struct smu_context *smu, const
 					    struct amd_pp_display_configuration
 					    *display_config);
+extern int smu_get_current_clocks(struct smu_context *smu,
+				  struct amd_pp_clock_info *clocks);
 
 #endif