From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Date: Fri, 15 Dec 2017 16:08:31 +0200
Subject: drm/omap: Init fbdev emulation only when we have displays
Git-commit: da77772172059e609ef5135881df55e3e6c5c808
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Do not try to init the fbdev if either num_crtcs or num_connectors is 0.
In this case we do not have display so the fbdev init would fail anyways.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/omapdrm/omap_fbdev.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/omapdrm/omap_fbdev.c
+++ b/drivers/gpu/drm/omapdrm/omap_fbdev.c
@@ -249,6 +249,9 @@ void omap_fbdev_init(struct drm_device *
 	struct drm_fb_helper *helper;
 	int ret = 0;
 
+	if (!priv->num_crtcs || !priv->num_connectors)
+		return;
+
 	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
 	if (!fbdev)
 		goto fail;