drm/amd/powerplay: add interface to write pptable (v2)

This patch adds interface to write pptable for smu.
It's to copy pptable bo in the vram to smc with SMU MSGs such as
SetDriverDramAddr and TransferTableDram2Smu.

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

@@ -192,6 +192,14 @@ static int smu_smc_table_hw_init(struct smu_context *smu)
 	if (ret)
 		return ret;
 
+	/*
+	 * Copy pptable bo in the vram to smc with SMU MSGs such as
+	 * SetDriverDramAddr and TransferTableDram2Smu.
+	 */
+	ret = smu_write_pptable(smu);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 

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

@@ -45,6 +45,7 @@ struct smu_funcs
 	int (*parse_pptable)(struct smu_context *smu);
 	int (*populate_smc_pptable)(struct smu_context *smu);
 	int (*check_fw_version)(struct smu_context *smu);
+	int (*write_pptable)(struct smu_context *smu);
 };
 
 #define smu_init_microcode(smu) \
@@ -69,6 +70,8 @@ struct smu_funcs
 	((smu)->funcs->populate_smc_pptable ? (smu)->funcs->populate_smc_pptable((smu)) : 0)
 #define smu_check_fw_version(smu) \
 	((smu)->funcs->check_fw_version ? (smu)->funcs->check_fw_version((smu)) : 0)
+#define smu_write_pptable(smu) \
+	((smu)->funcs->write_pptable ? (smu)->funcs->write_pptable((smu)) : 0)
 
 
 extern const struct amd_ip_funcs smu_ip_funcs;