RE: [PATCH] drm/amdgpu: add judgement for dc support

[Chen, Guchun]

[AMD Public Use]

Reviewed-by: Guchun Chen <guchun.c...@amd.com>

Regards,
Guchun

-----Original Message-----
From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org> On Behalf Of Asher Song
Sent: Tuesday, May 25, 2021 12:03 PM
To: amd-gfx@lists.freedesktop.org
Cc: Gao, Likun <likun....@amd.com>; Song, Asher <asher.s...@amd.com>
Subject: [PATCH] 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....@amd.com>
Signed-off-by: Asher Song <asher.s...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 8848e2b9bef9..148da7ca5d55 100644
--- 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);
--
2.25.1

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