Revert "drm/amdgpu: Add nbio support for vega20 (v2)"

Revert this to add proper nbio 7.4 support.

This reverts commit f5b2e1fa321eff20a9418ebd497d8a466f024a85.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c

@@ -34,19 +34,10 @@
 #define smnCPM_CONTROL                                                                                  0x11180460
 #define smnPCIE_CNTL2                                                                                   0x11180070
 
-/* vega20 */
-#define mmRCC_DEV0_EPF0_STRAP0_VG20                                                                         0x0011
-#define mmRCC_DEV0_EPF0_STRAP0_VG20_BASE_IDX                                                                2
-
 static u32 nbio_v7_0_get_rev_id(struct amdgpu_device *adev)
 {
         u32 tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
 
-	if (adev->asic_type == CHIP_VEGA20)
-		tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0_VG20);
-	else
-		tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
-
 	tmp &= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK;
 	tmp >>= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT;
 
@@ -84,14 +75,10 @@ static void nbio_v7_0_sdma_doorbell_range(struct amdgpu_device *adev, int instan
 			SOC15_REG_OFFSET(NBIO, 0, mmBIF_SDMA1_DOORBELL_RANGE);
 
 	u32 doorbell_range = RREG32(reg);
-	u32 range = 2;
-
-	if (adev->asic_type == CHIP_VEGA20)
-		range = 8;
 
 	if (use_doorbell) {
 		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, OFFSET, doorbell_index);
-		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, range);
+		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 2);
 	} else
 		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 0);
 
@@ -146,9 +133,6 @@ static void nbio_v7_0_update_medium_grain_clock_gating(struct amdgpu_device *ade
 {
 	uint32_t def, data;
 
-	if (adev->asic_type == CHIP_VEGA20)
-		return;
-
 	/* NBIF_MGCG_CTRL_LCLK */
 	def = data = RREG32_PCIE(smnNBIF_MGCG_CTRL_LCLK);
 

drivers/gpu/drm/amd/amdgpu/soc15.c

@@ -497,8 +497,6 @@ int soc15_set_ip_blocks(struct amdgpu_device *adev)
 
 	if (adev->flags & AMD_IS_APU)
 		adev->nbio_funcs = &nbio_v7_0_funcs;
-	else if (adev->asic_type == CHIP_VEGA20)
-		adev->nbio_funcs = &nbio_v7_0_funcs;
 	else
 		adev->nbio_funcs = &nbio_v6_1_funcs;