From f95429eccc570dc45d589c327bfcfddcdc3e8228 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@gmail.com>
Date: Mon, 25 Jan 2016 18:06:48 -0500
Subject: [PATCH] drm/radeon: only init fbdev if we have connectors
Git-commit: f95429eccc570dc45d589c327bfcfddcdc3e8228
Patch-mainline: 4.5-rc2
References: boo#955096,boo#967938

This fixes an issue that was noticed on an optimus/prime laptop with
a kernel that was old enough to not support the integrated intel gfx
(which was driving all the outputs), but did have support for the
discrete radeon gpu.  The end result was not falling back to VESA and
leaving the user with a black screen.

(Plus it is kind of silly to create an framebuffer device if there
are no outputs hooked up to the gpu.)

Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/radeon/radeon_display.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1670,8 +1670,10 @@ int radeon_modeset_init(struct radeon_de
 	/* setup afmt */
 	radeon_afmt_init(rdev);
 
-	radeon_fbdev_init(rdev);
-	drm_kms_helper_poll_init(rdev->ddev);
+	if (!list_empty(&rdev->ddev->mode_config.connector_list)) {
+		radeon_fbdev_init(rdev);
+		drm_kms_helper_poll_init(rdev->ddev);
+	}
 
 	/* do pm late init */
 	ret = radeon_pm_late_init(rdev);
