drm/amdgpu: correct CG_ACLK_CNTL setting

Correct polaris CG_ACLK_CNTL setting.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -729,8 +729,13 @@ static void gfx_v8_0_get_cu_info(struct amdgpu_device *adev);
 static void gfx_v8_0_ring_emit_ce_meta(struct amdgpu_ring *ring);
 static void gfx_v8_0_ring_emit_de_meta(struct amdgpu_ring *ring);
 
+#define CG_ACLK_CNTL__ACLK_DIVIDER_MASK                    0x0000007fL
+#define CG_ACLK_CNTL__ACLK_DIVIDER__SHIFT                  0x00000000L
+
 static void gfx_v8_0_init_golden_registers(struct amdgpu_device *adev)
 {
+	uint32_t data;
+
 	switch (adev->asic_type) {
 	case CHIP_TOPAZ:
 		amdgpu_device_program_register_sequence(adev,
@@ -790,11 +795,14 @@ static void gfx_v8_0_init_golden_registers(struct amdgpu_device *adev)
 		amdgpu_device_program_register_sequence(adev,
 							polaris10_golden_common_all,
 							ARRAY_SIZE(polaris10_golden_common_all));
-		WREG32_SMC(ixCG_ACLK_CNTL, 0x0000001C);
-		if (adev->pdev->revision == 0xc7 &&
+		data = RREG32_SMC(ixCG_ACLK_CNTL);
+		data &= ~CG_ACLK_CNTL__ACLK_DIVIDER_MASK;
+		data |= 0x18 << CG_ACLK_CNTL__ACLK_DIVIDER__SHIFT;
+		WREG32_SMC(ixCG_ACLK_CNTL, data);
+		if ((adev->pdev->device == 0x67DF) && (adev->pdev->revision == 0xc7) &&
 		    ((adev->pdev->subsystem_device == 0xb37 && adev->pdev->subsystem_vendor == 0x1002) ||
 		     (adev->pdev->subsystem_device == 0x4a8 && adev->pdev->subsystem_vendor == 0x1043) ||
-		     (adev->pdev->subsystem_device == 0x9480 && adev->pdev->subsystem_vendor == 0x1682))) {
+		     (adev->pdev->subsystem_device == 0x9480 && adev->pdev->subsystem_vendor == 0x1680))) {
 			amdgpu_atombios_i2c_channel_trans(adev, 0x10, 0x96, 0x1E, 0xDD);
 			amdgpu_atombios_i2c_channel_trans(adev, 0x10, 0x96, 0x1F, 0xD0);
 		}