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drm/amdgpu: don't init fbdev if we don't have any connectors

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Don't init fbdev if we don't have connectors.  E.g., if you have
a PX laptop with the displays attached to an IGP with no driver
support, you may end up with a blank screen rather than falling
back to vesa, etc.

Based on a similar radeon patch from Rob Clark.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-01-26 00:30:33 -05:00
parent f95429eccc
commit f49d45c973
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
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@ -333,6 +333,10 @@ int amdgpu_fbdev_init(struct amdgpu_device *adev)
if (!adev->mode_info.mode_config_initialized)
return 0;
/* don't init fbdev if there are no connectors */
if (list_empty(&adev->ddev->mode_config.connector_list))
return 0;
/* select 8 bpp console on low vram cards */
if (adev->mc.real_vram_size <= (32*1024*1024))
bpp_sel = 8;