diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
index 821289bff93a..89e6ad30396f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
@@ -53,6 +53,7 @@ struct amdgpu_doorbell_index {
 	uint32_t gfx_ring0;
 	uint32_t gfx_ring1;
 	uint32_t sdma_engine[8];
+	uint32_t mes_ring;
 	uint32_t ih;
 	union {
 		struct {
@@ -177,6 +178,7 @@ typedef enum _AMDGPU_NAVI10_DOORBELL_ASSIGNMENT
 	AMDGPU_NAVI10_DOORBELL_USERQUEUE_END		= 0x08A,
 	AMDGPU_NAVI10_DOORBELL_GFX_RING0		= 0x08B,
 	AMDGPU_NAVI10_DOORBELL_GFX_RING1		= 0x08C,
+	AMDGPU_NAVI10_DOORBELL_MES_RING		        = 0x090,
 	/* SDMA:256~335*/
 	AMDGPU_NAVI10_DOORBELL_sDMA_ENGINE0		= 0x100,
 	AMDGPU_NAVI10_DOORBELL_sDMA_ENGINE1		= 0x10A,
diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index b4178ce267f3..cad66cb1b6c2 100644
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -573,6 +573,7 @@ static void nv_init_doorbell_index(struct amdgpu_device *adev)
 	adev->doorbell_index.userqueue_end = AMDGPU_NAVI10_DOORBELL_USERQUEUE_END;
 	adev->doorbell_index.gfx_ring0 = AMDGPU_NAVI10_DOORBELL_GFX_RING0;
 	adev->doorbell_index.gfx_ring1 = AMDGPU_NAVI10_DOORBELL_GFX_RING1;
+	adev->doorbell_index.mes_ring = AMDGPU_NAVI10_DOORBELL_MES_RING;
 	adev->doorbell_index.sdma_engine[0] = AMDGPU_NAVI10_DOORBELL_sDMA_ENGINE0;
 	adev->doorbell_index.sdma_engine[1] = AMDGPU_NAVI10_DOORBELL_sDMA_ENGINE1;
 	adev->doorbell_index.sdma_engine[2] = AMDGPU_NAVI10_DOORBELL_sDMA_ENGINE2;