drm/amd/powerplay: add firmware loading interface

This patch adds firmware loading interface for smu.
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

@@ -96,6 +96,12 @@ static int smu_hw_init(void *handle)
 	if (adev->asic_type < CHIP_VEGA20)
 		return -EINVAL;
 
+	if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
+		ret = smu_load_microcode(smu);
+		if (ret)
+			return ret;
+	}
+
 	mutex_lock(&smu->mutex);
 
 	/* TODO */

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

@@ -35,10 +35,13 @@ struct smu_context
 struct smu_funcs
 {
 	int (*init_microcode)(struct smu_context *smu);
+	int (*load_microcode)(struct smu_context *smu);
 };
 
 #define smu_init_microcode(smu) \
 	((smu)->funcs->init_microcode ? (smu)->funcs->init_microcode((smu)) : 0)
+#define smu_load_microcode(smu) \
+	((smu)->funcs->load_microcode ? (smu)->funcs->load_microcode((smu)) : 0)
 
 extern const struct amd_ip_funcs smu_ip_funcs;
 

drivers/gpu/drm/amd/powerplay/smu_v11_0.c

@@ -32,8 +32,14 @@ static int smu_v11_0_init_microcode(struct smu_context *smu)
 	return 0;
 }
 
+static int smu_v11_0_load_microcode(struct smu_context *smu)
+{
+	return 0;
+}
+
 static const struct smu_funcs smu_v11_0_funcs = {
 	.init_microcode = smu_v11_0_init_microcode,
+	.load_microcode = smu_v11_0_load_microcode,
 };
 
 void smu_v11_0_set_smu_funcs(struct smu_context *smu)