Commit f2713e8c authored Mar 28, 2017 by Alex Deucher

drm/amdgpu: refine the logic in amdgpu_need_post()



We check the mem config register to make sure it's been
programmed by the vbios to determine if we need to post
so we check for a non-0 value.  However, when the asic
comes out of reset, we may see all ones here, so check
for that too.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent e5f586c7

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

+1 −1

Original line number	Diff line number	Diff line
		@@ -719,7 +719,7 @@ bool amdgpu_need_post(struct amdgpu_device *adev)
		/* then check MEM_SIZE, in case the crtcs are off */
		reg = amdgpu_asic_get_config_memsize(adev);

		if (reg)
		if ((reg != 0) && (reg != 0xffffffff))
		return false;

		return true;