drm/amdgpu: register a vga_switcheroo client for MacBooks with apple-gmux

From Orlando Chamberlain
78e32896ecc790994034a35a2edef0b6ae043537 in linux-6.1.y/6.1.28
d37a3929ca0363ed1dce02b2772cd5bc547ca66d in mainline linux

diff --git a/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c b/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c
index 113ce82..a15539e 100644 (file)
--- a/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c
+++ b/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c
@@ -35,6 +35,7 @@
 #include <linux/devcoredump.h>
 #include <generated/utsrelease.h>
 #include <linux/pci-p2pdma.h>
+#include <linux/apple-gmux.h>
 
 #include <drm/drm_aperture.h>
 #include <drm/drm_atomic_helper.h>
@@ -4023,12 +4024,15 @@ fence_driver_init:
                vga_client_register(adev->pdev, amdgpu_device_vga_set_decode);
 #endif
 
-       if (amdgpu_device_supports_px(ddev)) {
-               px = true;
+       px = amdgpu_device_supports_px(ddev);
+
+       if (px || (!pci_is_thunderbolt_attached(adev->pdev) &&
+                               apple_gmux_detect(NULL, NULL)))
                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,
@@ -4152,6 +4156,7 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
 void amdgpu_device_fini_sw(struct amdgpu_device *adev)
 {
        int idx;
+       bool px;
 
        amdgpu_fence_driver_sw_fini(adev);
        amdgpu_device_ip_fini(adev);
@@ -4171,10 +4176,16 @@ void amdgpu_device_fini_sw(struct amdgpu_device *adev)
 
        kfree(adev->bios);
        adev->bios = NULL;
-       if (amdgpu_device_supports_px(adev_to_drm(adev))) {
+
+       px = amdgpu_device_supports_px(adev_to_drm(adev));
+
+       if (px || (!pci_is_thunderbolt_attached(adev->pdev) &&
+                               apple_gmux_detect(NULL, NULL)))
                vga_switcheroo_unregister_client(adev->pdev);
+
+       if (px)
                vga_switcheroo_fini_domain_pm_ops(adev->dev);
-       }
+
        if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
                vga_client_unregister(adev->pdev);