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

This patch adds interface to parse pptable for smu.
It's to parse pptable format and fill PPTable_t smc_pptable to smu_table_context
structure. And read the smc_dpm_table from vbios, then fill it into smc_pptable.

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

@@ -166,6 +166,15 @@ static int smu_smc_table_hw_init(struct smu_context *smu)
 	if (ret)
 		return ret;
 
+	/*
+	 * Parse pptable format and fill PPTable_t smc_pptable to
+	 * smu_table_context structure. And read the smc_dpm_table from vbios,
+	 * then fill it into smc_pptable.
+	 */
+	ret = smu_parse_pptable(smu);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 

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

@@ -42,6 +42,7 @@ struct smu_funcs
 	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);
+	int (*parse_pptable)(struct smu_context *smu);
 };
 
 #define smu_init_microcode(smu) \
@@ -60,6 +61,9 @@ struct smu_funcs
 	((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)
+#define smu_parse_pptable(smu) \
+	((smu)->funcs->parse_pptable ? (smu)->funcs->parse_pptable((smu)) : 0)
+
 
 extern const struct amd_ip_funcs smu_ip_funcs;