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

[Christian König]

Am 08.06.20 um 21:41 schrieb Alex Deucher:
> No need to do it again.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

Reviewed-by: Christian König <christian.koenig 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)