drm/fb-helper: Add TODO for making drm_fb_helper_alloc_fbi fill apertures

Currently drivers using drm_fbdev_generic_setup() end up with a single
empty aperture in their fb_info struct.

Not having the proper info in the apertures list causes
register_framebuffer to not remove conflicting framebuffers,
which some drivers currently workaround by manually calling
drm_fb_helper_remove_conflicting_pci_framebuffers().

Add a TODO as a reminder that we need to fix this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200326151009.102377-1-hdegoede@redhat.com

drivers/gpu/drm/drm_fb_helper.c

@@ -514,6 +514,14 @@ struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
 	if (ret)
 		goto err_release;
 
+	/*
+	 * TODO: We really should be smarter here and alloc an apperture
+	 * for each IORESOURCE_MEM resource helper->dev->dev has and also
+	 * init the ranges of the appertures based on the resources.
+	 * Note some drivers currently count on there being only 1 empty
+	 * aperture and fill this themselves, these will need to be dealt
+	 * with somehow when fixing this.
+	 */
 	info->apertures = alloc_apertures(1);
 	if (!info->apertures) {
 		ret = -ENOMEM;