fbdev/efifb: Remove PM for parent device

The EFI device has the correct parent device set. This allows Linux
to handle the power management internally. Hence, remove the manual
PM management for the parent device from efifb.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240212090736.11464-5-tzimmermann@suse.de

drivers/video/fbdev/efifb.c

@@ -17,7 +17,6 @@
 #include <linux/platform_device.h>
 #include <linux/printk.h>
 #include <linux/screen_info.h>
-#include <linux/pm_runtime.h>
 #include <video/vga.h>
 #include <asm/efi.h>
 #include <drm/drm_utils.h> /* For drm_get_panel_orientation_quirk */
@@ -258,9 +257,6 @@ static void efifb_destroy(struct fb_info *info)
 {
 	struct efifb_par *par = info->par;
 
-	if (efifb_pci_dev)
-		pm_runtime_put(&efifb_pci_dev->dev);
-
 	if (info->screen_base) {
 		if (mem_flags & (EFI_MEMORY_UC | EFI_MEMORY_WC))
 			iounmap(info->screen_base);
@@ -598,26 +594,20 @@ static int efifb_probe(struct platform_device *dev)
 		goto err_groups;
 	}
 
-	if (efifb_pci_dev)
-		WARN_ON(pm_runtime_get_sync(&efifb_pci_dev->dev) < 0);
-
 	err = devm_aperture_acquire_for_platform_device(dev, par->base, par->size);
 	if (err) {
 		pr_err("efifb: cannot acquire aperture\n");
-		goto err_put_rpm_ref;
+		goto err_fb_dealloc_cmap;
 	}
 	err = register_framebuffer(info);
 	if (err < 0) {
 		pr_err("efifb: cannot register framebuffer\n");
-		goto err_put_rpm_ref;
+		goto err_fb_dealloc_cmap;
 	}
 	fb_info(info, "%s frame buffer device\n", info->fix.id);
 	return 0;
 
-err_put_rpm_ref:
-	if (efifb_pci_dev)
-		pm_runtime_put(&efifb_pci_dev->dev);
-
+err_fb_dealloc_cmap:
 	fb_dealloc_cmap(&info->cmap);
 err_groups:
 	sysfs_remove_groups(&dev->dev.kobj, efifb_groups);