drm/amdgpu: add judgement for dc support

Drop DC initialization when DCN is harvested in VBIOS. The way
doesn't affect virtual display ip initialization.

Signed-off-by: Likun Gao  <Likun.Gao@amd.com>
Signed-off-by: Asher Song <Asher.Song@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index d3611a5..73bbe3e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3122,7 +3122,9 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
  */
 bool amdgpu_device_has_dc_support(struct amdgpu_device *adev)
 {
-       if (amdgpu_sriov_vf(adev) || adev->enable_virtual_display)
+       if (amdgpu_sriov_vf(adev) || 
+           adev->enable_virtual_display ||
+           (adev->harvest_ip_mask & AMD_HARVEST_IP_DMU_MASK))
                return false;
 
        return amdgpu_device_asic_has_dc_support(adev->asic_type);