[ 3.5.y.z extended stable ] Patch "drm/nouveau: headless mode by default if pci class != vga" has been added to staging queue

[Herton Ronaldo Krzesinski]

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

    drm/nouveau: headless mode by default if pci class != vga

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

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

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

------

>From 980113ed16bee7cab6dbea5354785dd23eea8d70 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs at redhat.com>
Date: Thu, 1 Nov 2012 16:16:32 +1000
Subject: [PATCH] drm/nouveau: headless mode by default if pci class != vga
 display

commit e412e95a268fa8544858ebfe066826b290430d51 upstream.

This is to prevent nouveau from taking over the console on headless boards
such as Tesla.

Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
 drivers/gpu/drm/nouveau/nouveau_drv.c   |    2 --
 drivers/gpu/drm/nouveau/nouveau_state.c |    4 +++-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.c b/drivers/gpu/drm/nouveau/nouveau_drv.c
index 714acfb..83b9bde 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.c
@@ -473,9 +473,7 @@ static int __init nouveau_init(void)
 #ifdef CONFIG_VGA_CONSOLE
 		if (vgacon_text_force())
 			nouveau_modeset = 0;
-		else
 #endif
-			nouveau_modeset = 1;
 	}

 	if (!nouveau_modeset)
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index 22a90a0..91a5064 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -50,6 +50,7 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_engine *engine = &dev_priv->engine;
+	u32 pclass = dev->pdev->class >> 8;

 	switch (dev_priv->chipset & 0xf0) {
 	case 0x00:
@@ -428,7 +429,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
 	}

 	/* headless mode */
-	if (nouveau_modeset == 2) {
+	if (nouveau_modeset == 2 ||
+	    (nouveau_modeset < 0 && pclass != PCI_CLASS_DISPLAY_VGA)) {
 		engine->display.early_init = nouveau_stub_init;
 		engine->display.late_takedown = nouveau_stub_takedown;
 		engine->display.create = nouveau_stub_init;
--
1.7.9.5