On Fri, Feb 10, 2023 at 3:04 AM Orlando Chamberlain
<orlandoch.dev@xxxxxxxxx> wrote:
>
> From: Kerem Karabay <kekrby@xxxxxxxxx>
>
> Commit 3840c5bcc245 ("drm/amdgpu: disentangle runtime pm and
> vga_switcheroo") made amdgpu only register a vga_switcheroo client for
> GPU's with PX, however AMD GPUs in dual gpu Apple Macbooks do need to
> register, but don't have PX. Instead of AMD's PX, they use apple-gmux.
Is there a way to detect apple-gmux instead? Otherwise, we register
vga_switcheroo on any system with multiple GPUs which is not what we
want.
Alex
>
> Revert to the old logic of registering for all non-thunderbolt gpus,
> like radeon and nouveau.
>
> Fixes: 3840c5bcc245 ("drm/amdgpu: disentangle runtime pm and vga_switcheroo")
> Signed-off-by: Kerem Karabay <kekrby@xxxxxxxxx>
> [Orlando Chamberlain <orlandoch.dev@xxxxxxxxx>: add commit description]
> Signed-off-by: Orlando Chamberlain <orlandoch.dev@xxxxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 18 +++++++++++-------
> 1 file changed, 11 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 2f28a8c02f64..0bb553a61552 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3919,12 +3919,13 @@ int amdgpu_device_init(struct amdgpu_device *adev,
> if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
> vga_client_register(adev->pdev, amdgpu_device_vga_set_decode);
>
> - if (amdgpu_device_supports_px(ddev)) {
> - px = true;
> - vga_switcheroo_register_client(adev->pdev,
> - &amdgpu_switcheroo_ops, px);
> + px = amdgpu_device_supports_px(ddev);
> +
> + if (!pci_is_thunderbolt_attached(adev->pdev))
> + vga_switcheroo_register_client(adev->pdev, &amdgpu_switcheroo_ops, px);
> +
> + if (px)
> vga_switcheroo_init_domain_pm_ops(adev->dev, &adev->vga_pm_domain);
> - }
>
> if (adev->gmc.xgmi.pending_reset)
> queue_delayed_work(system_wq, &mgpu_info.delayed_reset_work,
> @@ -4048,10 +4049,13 @@ void amdgpu_device_fini_sw(struct amdgpu_device *adev)
>
> kfree(adev->bios);
> adev->bios = NULL;
> - if (amdgpu_device_supports_px(adev_to_drm(adev))) {
> +
> + if (!pci_is_thunderbolt_attached(adev->pdev))
> vga_switcheroo_unregister_client(adev->pdev);
> +
> + if (amdgpu_device_supports_px(adev_to_drm(adev)))
> vga_switcheroo_fini_domain_pm_ops(adev->dev);
> - }
> +
> if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
> vga_client_unregister(adev->pdev);
>
> --
> 2.39.1
>
