diff options
| author | Lukas Wunner | 2017-03-10 21:23:45 +0100 |
|---|---|---|
| committer | Lukas Wunner | 2017-03-30 22:42:30 +0200 |
| commit | 84c8b22e9fe8d9a7f2ab3d561a6b4576540f5a31 (patch) | |
| tree | 53ead813505c6efe3ea29d23f9ca356f64eaf3b9 | |
| parent | drm/radeon: Don't register Thunderbolt eGPU with vga_switcheroo (diff) | |
| download | kernel-qcow2-linux-84c8b22e9fe8d9a7f2ab3d561a6b4576540f5a31.tar.gz kernel-qcow2-linux-84c8b22e9fe8d9a7f2ab3d561a6b4576540f5a31.tar.xz kernel-qcow2-linux-84c8b22e9fe8d9a7f2ab3d561a6b4576540f5a31.zip | |
drm/amdgpu: Don't register Thunderbolt eGPU with vga_switcheroo
An external Thunderbolt GPU can neither drive the laptop's panel nor be
powered off by the platform, so there's no point in registering it with
vga_switcheroo. In fact, when the external GPU is runtime suspended,
vga_switcheroo will cut power to the internal discrete GPU, resulting in
a lockup. Moreover AMD's Windows driver special-cases Thunderbolt as
well.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: http://patchwork.freedesktop.org/patch/msgid/701a8e89ce8ac39734736ab779558b6a4042a19e.1489145162.git.lukas@wunner.de
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 |
2 files changed, 7 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index a3a105ec99e2..29965498c91f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -1763,7 +1763,9 @@ int amdgpu_device_init(struct amdgpu_device *adev, runtime = true; if (amdgpu_device_is_px(ddev)) runtime = true; - vga_switcheroo_register_client(adev->pdev, &amdgpu_switcheroo_ops, runtime); + if (!pci_is_thunderbolt_attached(adev->pdev)) + vga_switcheroo_register_client(adev->pdev, + &amdgpu_switcheroo_ops, runtime); if (runtime) vga_switcheroo_init_domain_pm_ops(adev->dev, &adev->vga_pm_domain); @@ -1926,7 +1928,8 @@ void amdgpu_device_fini(struct amdgpu_device *adev) amdgpu_atombios_fini(adev); kfree(adev->bios); adev->bios = NULL; - vga_switcheroo_unregister_client(adev->pdev); + if (!pci_is_thunderbolt_attached(adev->pdev)) + vga_switcheroo_unregister_client(adev->pdev); if (adev->flags & AMD_IS_PX) vga_switcheroo_fini_domain_pm_ops(adev->dev); vga_client_register(adev->pdev, NULL, NULL, NULL); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c index 61d94c745672..2f3b236721c9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -103,7 +103,8 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags) amdgpu_has_atpx() && (amdgpu_is_atpx_hybrid() || amdgpu_has_atpx_dgpu_power_cntl()) && - ((flags & AMD_IS_APU) == 0)) + ((flags & AMD_IS_APU) == 0) && + !pci_is_thunderbolt_attached(dev->pdev)) flags |= AMD_IS_PX; /* amdgpu_device_init should report only fatal error |