Revert "drm/amdgpu: disable runpm if we are the primary adapter"

This reverts commit b95dc06a.

This workaround is no longer necessary.  We have a better workaround
in commit f95af4a9 ("drm/amdgpu: don't runtime suspend if there are displays attached (v3)").
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1005,7 +1005,6 @@ struct amdgpu_device {
 	bool                            runpm;
 	bool                            in_runpm;
 	bool                            has_pr3;
-	bool                            is_fw_fb;
 
 	bool                            pm_sysfs_en;
 	bool                            ucode_sysfs_en;

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -38,7 +38,6 @@
 #include <linux/mmu_notifier.h>
 #include <linux/suspend.h>
 #include <linux/cc_platform.h>
-#include <linux/fb.h>
 
 #include "amdgpu.h"
 #include "amdgpu_irq.h"
@@ -1960,26 +1959,6 @@ MODULE_DEVICE_TABLE(pci, pciidlist);
 
 static const struct drm_driver amdgpu_kms_driver;
 
-static bool amdgpu_is_fw_framebuffer(resource_size_t base,
-				     resource_size_t size)
-{
-	bool found = false;
-#if IS_REACHABLE(CONFIG_FB)
-	struct apertures_struct *a;
-
-	a = alloc_apertures(1);
-	if (!a)
-		return false;
-
-	a->ranges[0].base = base;
-	a->ranges[0].size = size;
-
-	found = is_firmware_framebuffer(a);
-	kfree(a);
-#endif
-	return found;
-}
-
 static void amdgpu_get_secondary_funcs(struct amdgpu_device *adev)
 {
 	struct pci_dev *p = NULL;
@@ -2010,8 +1989,6 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 	unsigned long flags = ent->driver_data;
 	int ret, retry = 0, i;
 	bool supports_atomic = false;
-	bool is_fw_fb;
-	resource_size_t base, size;
 
 	/* skip devices which are owned by radeon */
 	for (i = 0; i < ARRAY_SIZE(amdgpu_unsupported_pciidlist); i++) {
@@ -2078,10 +2055,6 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 	}
 #endif
 
-	base = pci_resource_start(pdev, 0);
-	size = pci_resource_len(pdev, 0);
-	is_fw_fb = amdgpu_is_fw_framebuffer(base, size);
-
 	/* Get rid of things like offb */
 	ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &amdgpu_kms_driver);
 	if (ret)
@@ -2094,7 +2067,6 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 	adev->dev  = &pdev->dev;
 	adev->pdev = pdev;
 	ddev = adev_to_drm(adev);
-	adev->is_fw_fb = is_fw_fb;
 
 	if (!supports_atomic)
 		ddev->driver_features &= ~DRIVER_ATOMIC;

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -185,12 +185,6 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
 			adev->runpm = true;
 			break;
 		}
-		/* XXX: disable runtime pm if we are the primary adapter
-		 * to avoid displays being re-enabled after DPMS.
-		 * This needs to be sorted out and fixed properly.
-		 */
-		if (adev->is_fw_fb)
-			adev->runpm = false;
 
 		amdgpu_runtime_pm_quirk(adev);