[4.2.y-ckt stable] Patch "drm/radeon: rework fbdev handling on chips with no connectors" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    drm/radeon: rework fbdev handling on chips with no connectors

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt7.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From d41fede58f6d2f124ddd8c0ea151ce687b5f2e1b Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher at amd.com>
Date: Thu, 10 Mar 2016 15:55:26 -0500
Subject: drm/radeon: rework fbdev handling on chips with no connectors

commit e5f243bd2edd95c6cc1d90c1878f821068e83fba upstream.

Move all the logic to radeon_fb.c and add checks to functions
called frome elsewhere.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=112781

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/gpu/drm/radeon/radeon_fb.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index aeb6767..0aff289 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -334,7 +334,8 @@ out_unref:

 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 {
-	drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
+	if (rdev->mode_info.rfbdev)
+		drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 }

 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
@@ -374,6 +375,10 @@ int radeon_fbdev_init(struct radeon_device *rdev)
 	int bpp_sel = 32;
 	int ret;

+	/* don't enable fbdev if no connectors */
+	if (list_empty(&rdev->ddev->mode_config.connector_list))
+		return 0;
+
 	/* select 8 bpp console on RN50 or 16MB cards */
 	if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 		bpp_sel = 8;
@@ -426,11 +431,15 @@ void radeon_fbdev_fini(struct radeon_device *rdev)

 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 {
-	fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
+	if (rdev->mode_info.rfbdev)
+		fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 }

 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 {
+	if (!rdev->mode_info.rfbdev)
+		return false;
+
 	if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 		return true;
 	return false;
@@ -438,10 +447,12 @@ bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)

 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 {
-	drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
+	if (rdev->mode_info.rfbdev)
+		drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 }

 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 {
-	drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
+	if (rdev->mode_info.rfbdev)
+		drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 }
--
2.7.4