From 141e54329c5e5154a90a7a874aee990007e949ae Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Mon, 30 Jul 2018 19:40:53 +0000
Subject: [PATCH] If we keep the BIOS framebuffer, stick to the desired
 framebuffer size instead of using the actual framebuffer size.  This fixes a
 problem seen on various Apple machines where the BIOS framebuffer is bigger
 than the actual display.

ok jcs@, mpi@
---
 sys/dev/pci/drm/i915/intel_fbdev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/dev/pci/drm/i915/intel_fbdev.c b/sys/dev/pci/drm/i915/intel_fbdev.c
index bf221b05b50b..a03b13dc0e9e 100644
--- a/sys/dev/pci/drm/i915/intel_fbdev.c
+++ b/sys/dev/pci/drm/i915/intel_fbdev.c
@@ -220,8 +220,10 @@ static int intelfb_create(struct drm_fb_helper *helper,
 	} else {
 		DRM_DEBUG_KMS("re-using BIOS fb\n");
 		prealloc = true;
+#ifdef __linux__
 		sizes->fb_width = intel_fb->base.width;
 		sizes->fb_height = intel_fb->base.height;
+#endif
 	}
 
 	obj = intel_fb->obj;