drm/amdgpu: add 2rd VCN instance doorbell support

Sienna_Cichlid have 2 VCN instances, using different register for range
Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h

@@ -193,8 +193,13 @@ typedef enum _AMDGPU_NAVI10_DOORBELL_ASSIGNMENT
 	AMDGPU_NAVI10_DOORBELL64_VCN4_5			= 0x18A,
 	AMDGPU_NAVI10_DOORBELL64_VCN6_7			= 0x18B,
 
+	AMDGPU_NAVI10_DOORBELL64_VCN8_9			= 0x18C,
+	AMDGPU_NAVI10_DOORBELL64_VCNa_b			= 0x18D,
+	AMDGPU_NAVI10_DOORBELL64_VCNc_d			= 0x18E,
+	AMDGPU_NAVI10_DOORBELL64_VCNe_f			= 0x18F,
+
 	AMDGPU_NAVI10_DOORBELL64_FIRST_NON_CP		= AMDGPU_NAVI10_DOORBELL_sDMA_ENGINE0,
-	AMDGPU_NAVI10_DOORBELL64_LAST_NON_CP		= AMDGPU_NAVI10_DOORBELL64_VCN6_7,
+	AMDGPU_NAVI10_DOORBELL64_LAST_NON_CP		= AMDGPU_NAVI10_DOORBELL64_VCNe_f,
 
 	AMDGPU_NAVI10_DOORBELL_MAX_ASSIGNMENT		= 0x18F,
 	AMDGPU_NAVI10_DOORBELL_INVALID			= 0xFFFF

drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c

@@ -38,6 +38,9 @@
 #define mmBIF_SDMA3_DOORBELL_RANGE		0x01d7
 #define mmBIF_SDMA3_DOORBELL_RANGE_BASE_IDX	2
 
+#define mmBIF_MMSCH1_DOORBELL_RANGE		0x01d8
+#define mmBIF_MMSCH1_DOORBELL_RANGE_BASE_IDX	2
+
 static void nbio_v2_3_remap_hdp_registers(struct amdgpu_device *adev)
 {
 	WREG32_SOC15(NBIO, 0, mmREMAP_HDP_MEM_FLUSH_CNTL,
@@ -109,7 +112,8 @@ static void nbio_v2_3_sdma_doorbell_range(struct amdgpu_device *adev, int instan
 static void nbio_v2_3_vcn_doorbell_range(struct amdgpu_device *adev, bool use_doorbell,
 					 int doorbell_index, int instance)
 {
-	u32 reg = SOC15_REG_OFFSET(NBIO, 0, mmBIF_MMSCH0_DOORBELL_RANGE);
+	u32 reg = instance ? SOC15_REG_OFFSET(NBIO, 0, mmBIF_MMSCH1_DOORBELL_RANGE) :
+		SOC15_REG_OFFSET(NBIO, 0, mmBIF_MMSCH0_DOORBELL_RANGE);
 
 	u32 doorbell_range = RREG32(reg);