[PATCH] drm/amdgpu: skip BAR resizing if the bios already did it

[Felix Kuehling]

Am 2020-06-08 um 3:41 p.m. schrieb Alex Deucher:
> No need to do it again.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

Acked-by: Felix Kuehling <Felix.Kuehling at amd.com>


> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 1df28b7bf22e..539010798116 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -909,6 +909,11 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
>  	if (amdgpu_sriov_vf(adev))
>  		return 0;
>  
> +	/* skip if the bios has already enabled large BAR */
> +	if (adev->gmc.real_vram_size &&
> +	    (pci_resource_len(adev->pdev, 0) >= adev->gmc.real_vram_size))
> +		return 0;
> +
>  	/* Check if the root BUS has 64bit memory resources */
>  	root = adev->pdev->bus;
>  	while (root->parent)