drm/amd/powerplay: add get atom data table helper

This patch adds get atom data table helper for smu future use.
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/powerplay/amdgpu_smu.c

@@ -27,6 +27,7 @@
 #include "amdgpu_smu.h"
 #include "soc15_common.h"
 #include "smu_v11_0.h"
+#include "atom.h"
 
 static int smu_set_funcs(struct amdgpu_device *adev)
 {
@@ -59,6 +60,22 @@ static int smu_early_init(void *handle)
 	return 0;
 }
 
+int smu_get_atom_data_table(struct smu_context *smu, uint32_t table,
+			    uint16_t *size, uint8_t *frev, uint8_t *crev,
+			    uint8_t **addr)
+{
+	struct amdgpu_device *adev = smu->adev;
+	uint16_t data_start;
+
+	if (!amdgpu_atom_parse_data_header(adev->mode_info.atom_context, table,
+					   size, frev, crev, &data_start))
+		return -EINVAL;
+
+	*addr = (uint8_t *)adev->mode_info.atom_context->bios + data_start;
+
+	return 0;
+}
+
 static int smu_initialize_pptable(struct smu_context *smu)
 {
 	/* TODO */

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

@@ -106,6 +106,10 @@ struct smu_funcs
 #define smu_send_smc_msg_with_param(smu, msg, param) \
 	((smu)->funcs->send_smc_msg_with_param? (smu)->funcs->send_smc_msg_with_param((smu), (msg), (param)) : 0)
 
+extern int smu_get_atom_data_table(struct smu_context *smu, uint32_t table,
+				   uint16_t *size, uint8_t *frev, uint8_t *crev,
+				   uint8_t **addr);
+
 extern const struct amd_ip_funcs smu_ip_funcs;
 
 extern const struct amdgpu_ip_block_version smu_v11_0_ip_block;