drm/amdgpu/vcn:Remove DPG mode unused steps during vcn start

Remove Dynamic Power Gate mode unused steps during VCN start
Signed-off-by: NJames Zhu <James.Zhu@amd.com>
Acked-by: NLeo Liu <leo.liu@amd.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c

@@ -981,22 +981,6 @@ static int vcn_v1_0_start_dpg_mode(struct amdgpu_device *adev)
 	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_MASTINT_EN,
 			0, UVD_MASTINT_EN__VCPU_EN_MASK, 0);
 
-	/* stall UMC and register bus before resetting VCPU */
-	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_LMI_CTRL2,
-			UVD_LMI_CTRL2__STALL_ARB_UMC_MASK, UVD_LMI_CTRL2__STALL_ARB_UMC_MASK, 0);
-
-	/* put LMI, VCPU, RBC etc... into reset */
-	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_SOFT_RESET,
-		UVD_SOFT_RESET__LMI_SOFT_RESET_MASK |
-		UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK |
-		UVD_SOFT_RESET__LBSI_SOFT_RESET_MASK |
-		UVD_SOFT_RESET__RBC_SOFT_RESET_MASK |
-		UVD_SOFT_RESET__CSM_SOFT_RESET_MASK |
-		UVD_SOFT_RESET__CXW_SOFT_RESET_MASK |
-		UVD_SOFT_RESET__TAP_SOFT_RESET_MASK |
-		UVD_SOFT_RESET__LMI_UMC_SOFT_RESET_MASK,
-		0xFFFFFFFF, 0);
-
 	/* initialize VCN memory controller */
 	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_LMI_CTRL,
 		(8 << UVD_LMI_CTRL__WRITE_CLEAN_TIMER__SHIFT) |
@@ -1039,14 +1023,6 @@ static int vcn_v1_0_start_dpg_mode(struct amdgpu_device *adev)
 	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_REG_XX_MASK, 0x10, 0xFFFFFFFF, 0);
 	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_RBC_XX_IB_REG_CHECK, 0x3, 0xFFFFFFFF, 0);
 
-	/* take all subblocks out of reset, except VCPU */
-	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_SOFT_RESET,
-			UVD_SOFT_RESET__VCPU_SOFT_RESET_MASK, 0xFFFFFFFF, 0);
-
-	/* enable VCPU clock */
-	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_VCPU_CNTL,
-			UVD_VCPU_CNTL__CLK_EN_MASK, 0xFFFFFFFF, 0);
-
 	/* enable UMC */
 	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_LMI_CTRL2,
 			0, UVD_LMI_CTRL2__STALL_ARB_UMC_MASK, 0);
@@ -1056,8 +1032,7 @@ static int vcn_v1_0_start_dpg_mode(struct amdgpu_device *adev)
 
 	/* enable master interrupt */
 	WREG32_SOC15_DPG_MODE(UVD, 0, mmUVD_MASTINT_EN,
-			(UVD_MASTINT_EN__VCPU_EN_MASK|UVD_MASTINT_EN__SYS_EN_MASK),
-			(UVD_MASTINT_EN__VCPU_EN_MASK|UVD_MASTINT_EN__SYS_EN_MASK), 0);
+			UVD_MASTINT_EN__VCPU_EN_MASK, UVD_MASTINT_EN__VCPU_EN_MASK, 0);
 
 	vcn_v1_0_clock_gating_dpg_mode(adev, 1);
 	/* setup mmUVD_LMI_CTRL */
@@ -1085,7 +1060,6 @@ static int vcn_v1_0_start_dpg_mode(struct amdgpu_device *adev)
 	tmp = REG_SET_FIELD(0, UVD_RBC_RB_CNTL, RB_BUFSZ, rb_bufsz);
 	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_BLKSZ, 1);
 	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_NO_FETCH, 1);
-	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_WPTR_POLL_EN, 0);
 	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_NO_UPDATE, 1);
 	tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_RPTR_WR_EN, 1);
 	WREG32_SOC15(UVD, 0, mmUVD_RBC_RB_CNTL, tmp);