[AMD Official Use Only - Internal Distribution Only]
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
________________________________
From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org> on behalf of Tianci Yin
<tianci....@amd.com>
Sent: Friday, November 6, 2020 2:36 AM
To: amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org>
Cc: Long, Gang <gang.l...@amd.com>; Chen, Guchun <guchun.c...@amd.com>; Xu,
Feifei <feifei...@amd.com>; Yin, Tianci (Rico) <tianci....@amd.com>; Tuikov,
Luben <luben.tui...@amd.com>; Deucher, Alexander <alexander.deuc...@amd.com>;
Cui, Flora <flora....@amd.com>; Zhang, Hawking <hawking.zh...@amd.com>
Subject: [PATCH] drm/amdgpu: enable DCN for navi10 headless SKU
From: "Tianci.Yin" <tianci....@amd.com>
There is a NULL pointer crash when DCN disabled on headless SKU.
On normal SKU, the variable adev->ddev.mode_config.funcs is
initialized in dm_hw_init(), and it is fine to access it in
amdgpu_device_resume(). But on headless SKU, DCN is disabled,
the funcs variable is not initialized, then crash arises.
Enable DCN to fix this issue.
Change-Id: I33bc30210e3420e60ceb59175e39855d00b05b06
Signed-off-by: Tianci.Yin <tianci....@amd.com>
---
drivers/gpu/drm/amd/amdgpu/nv.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index e33d8022cc32..67375b2948f5 100644
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -535,8 +535,7 @@ int nv_set_ip_blocks(struct amdgpu_device *adev)
if (adev->enable_virtual_display || amdgpu_sriov_vf(adev))
amdgpu_device_ip_block_add(adev,
&dce_virtual_ip_block);
#if defined(CONFIG_DRM_AMD_DC)
- else if (amdgpu_device_has_dc_support(adev) &&
- !nv_is_headless_sku(adev->pdev))
+ else if (amdgpu_device_has_dc_support(adev))
amdgpu_device_ip_block_add(adev, &dm_ip_block);
#endif
amdgpu_device_ip_block_add(adev, &gfx_v10_0_ip_block);
--
2.25.1
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