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

This patch adds interface to check pptable function for smu.
It's to check if the format_revision in vbios is up to pptable header version,
and the structure size is not 0.

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

@@ -145,6 +145,14 @@ static int smu_smc_table_hw_init(struct smu_context *smu)
 	if (ret)
 		return ret;
 
+	/*
+	 * check if the format_revision in vbios is up to pptable header
+	 * version, and the structure size is not 0.
+	 */
+	ret = smu_check_pptable(smu);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 

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

@@ -41,6 +41,7 @@ struct smu_funcs
 	int (*check_fw_status)(struct smu_context *smu);
 	int (*read_pptable_from_vbios)(struct smu_context *smu);
 	int (*get_vbios_bootup_values)(struct smu_context *smu);
+	int (*check_pptable)(struct smu_context *smu);
 };
 
 #define smu_init_microcode(smu) \
@@ -57,6 +58,8 @@ struct smu_funcs
 	((smu)->funcs->read_pptable_from_vbios ? (smu)->funcs->read_pptable_from_vbios((smu)) : 0)
 #define smu_get_vbios_bootup_values(smu) \
 	((smu)->funcs->get_vbios_bootup_values ? (smu)->funcs->get_vbios_bootup_values((smu)) : 0)
+#define smu_check_pptable(smu) \
+	((smu)->funcs->check_pptable ? (smu)->funcs->check_pptable((smu)) : 0)
 
 extern const struct amd_ip_funcs smu_ip_funcs;