[PATCH] drm/amdgpu: only register VGA devices with the VGA arbiter

[Christian König]

Reviewed-by: Christian König <christian.koenig at amd.com>

Am 20.11.20 um 16:04 schrieb Xu, Feifei:
> [AMD Official Use Only - Internal Distribution Only]
>
> Reviewed-by: Feifei Xu <Feifei.Xu at amd.com>
>
> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Alex Deucher
> Sent: Friday, November 20, 2020 10:55 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>
> Subject: [PATCH] drm/amdgpu: only register VGA devices with the VGA arbiter
>
> We only need to arbitrate VGA access on VGA compatible devices.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 2f60b7084f4d..2670fb113ba1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3346,7 +3346,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>   /* if we have > 1 VGA cards, then disable the amdgpu VGA resources */
>   /* this will fail for cards that aren't VGA class devices, just
>    * ignore it */
> -vga_client_register(adev->pdev, adev, NULL, amdgpu_device_vga_set_decode);
> +if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
> +vga_client_register(adev->pdev, adev, NULL, amdgpu_device_vga_set_decode);
>
>   if (amdgpu_device_supports_boco(ddev))
>   boco = true;
> @@ -3605,7 +3606,8 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
>   vga_switcheroo_unregister_client(adev->pdev);
>   if (amdgpu_device_supports_boco(adev_to_drm(adev)))
>   vga_switcheroo_fini_domain_pm_ops(adev->dev);
> -vga_client_register(adev->pdev, NULL, NULL, NULL);
> +if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
> +vga_client_register(adev->pdev, NULL, NULL, NULL);
>   if (adev->rio_mem)
>   pci_iounmap(adev->pdev, adev->rio_mem);
>   adev->rio_mem = NULL;
> --
> 2.25.4
>
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