drm/amd/powerplay: add interface to init power (v2)

This patch adds interface to init power function for smu.
It's to create smu_power_context structure, and allocate smu_dpm_context and
context size to fill the smu_power_context data.

v2: add detailed info to describe this function
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -85,6 +85,16 @@ static int smu_smc_table_sw_init(struct smu_context *smu)
 		return ret;
 	}
 
+	/**
+	 * Create smu_power_context structure, and allocate smu_dpm_context and
+	 * context size to fill the smu_power_context data.
+	 */
+	ret = smu_init_power(smu);
+	if (ret) {
+		pr_err("Failed to init smu_init_power!\n");
+		return ret;
+	}
+
 	return 0;
 }
 

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

@@ -36,6 +36,7 @@ struct smu_funcs
 {
 	int (*init_microcode)(struct smu_context *smu);
 	int (*init_smc_tables)(struct smu_context *smu);
+	int (*init_power)(struct smu_context *smu);
 	int (*load_microcode)(struct smu_context *smu);
 	int (*check_fw_status)(struct smu_context *smu);
 	int (*read_pptable_from_vbios)(struct smu_context *smu);
@@ -45,6 +46,8 @@ struct smu_funcs
 	((smu)->funcs->init_microcode ? (smu)->funcs->init_microcode((smu)) : 0)
 #define smu_init_smc_tables(smu) \
 	((smu)->funcs->init_smc_tables ? (smu)->funcs->init_smc_tables((smu)) : 0)
+#define smu_init_power(smu) \
+	((smu)->funcs->init_power ? (smu)->funcs->init_power((smu)) : 0)
 #define smu_load_microcode(smu) \
 	((smu)->funcs->load_microcode ? (smu)->funcs->load_microcode((smu)) : 0)
 #define smu_check_fw_status(smu) \