[3.16.y-ckt stable] Patch "drm/nouveau: ltc/gf100-: fix cbc issues on certain boards" has been added to staging queue

[Luis Henriques]

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

    drm/nouveau: ltc/gf100-: fix cbc issues on certain boards

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt2.

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

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 9369f06ace89f9d4b73bfe1dd940ab585b18676a Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs at redhat.com>
Date: Sat, 20 Sep 2014 17:39:00 +1000
Subject: drm/nouveau: ltc/gf100-: fix cbc issues on certain boards

commit fe3d9c4b87bb98222a502cc585844a0b950786fb upstream.

A mismatch between FB and LTC's idea of how big a large page is causes
issues such as black "holes" in rendering to occur on some boards
(those where LTC is configured for 64KiB large pages) when compression
is used.

Confirmed to fix at least the GK107 MBP.

Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
Signed-off-by: Dave Airlie <airlied at redhat.com>
Cc: Sven Joachim <svenjoac at gmx.de>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/gpu/drm/nouveau/core/subdev/bar/nvc0.c   | 1 -
 drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c    | 1 +
 drivers/gpu/drm/nouveau/core/subdev/ltcg/gf100.c | 2 ++
 drivers/gpu/drm/nouveau/core/subdev/ltcg/gm107.c | 2 ++
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bar/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/bar/nvc0.c
index ca8139b9ab27..016ac9ae36a4 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/bar/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bar/nvc0.c
@@ -200,7 +200,6 @@ nvc0_bar_init(struct nouveau_object *object)

 	nv_mask(priv, 0x000200, 0x00000100, 0x00000000);
 	nv_mask(priv, 0x000200, 0x00000100, 0x00000100);
-	nv_mask(priv, 0x100c80, 0x00000001, 0x00000000);

 	nv_wr32(priv, 0x001704, 0x80000000 | priv->bar[1].mem->addr >> 12);
 	if (priv->bar[0].mem)
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c
index 0670ae33ee45..0a6ca9fc337f 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c
@@ -60,6 +60,7 @@ nvc0_fb_init(struct nouveau_object *object)

 	if (priv->r100c10_page)
 		nv_wr32(priv, 0x100c10, priv->r100c10 >> 8);
+	nv_mask(priv, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
 	return 0;
 }

diff --git a/drivers/gpu/drm/nouveau/core/subdev/ltcg/gf100.c b/drivers/gpu/drm/nouveau/core/subdev/ltcg/gf100.c
index effe88888bf9..945464749e04 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/ltcg/gf100.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/ltcg/gf100.c
@@ -200,6 +200,7 @@ gf100_ltcg_init(struct nouveau_object *object)
 {
 	struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object;
 	struct gf100_ltcg_priv *priv = (struct gf100_ltcg_priv *)ltcg;
+	u32 lpg128 = !(nv_rd32(priv, 0x100c80) & 0x00000001);
 	int ret;

 	ret = nouveau_ltcg_init(ltcg);
@@ -211,6 +212,7 @@ gf100_ltcg_init(struct nouveau_object *object)
 	if (nv_device(ltcg)->card_type >= NV_E0)
 		nv_wr32(priv, 0x17e000, priv->ltc_nr);
 	nv_wr32(priv, 0x17e8d4, priv->tag_base);
+	nv_mask(priv, 0x17e8c0, 0x00000002, lpg128 ? 0x00000002 : 0x00000000);
 	return 0;
 }

diff --git a/drivers/gpu/drm/nouveau/core/subdev/ltcg/gm107.c b/drivers/gpu/drm/nouveau/core/subdev/ltcg/gm107.c
index e79d0e81de40..48ca7a460263 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/ltcg/gm107.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/ltcg/gm107.c
@@ -119,6 +119,7 @@ gm107_ltcg_init(struct nouveau_object *object)
 {
 	struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object;
 	struct gf100_ltcg_priv *priv = (struct gf100_ltcg_priv *)ltcg;
+	u32 lpg128 = !(nv_rd32(priv, 0x100c80) & 0x00000001);
 	int ret;

 	ret = nouveau_ltcg_init(ltcg);
@@ -127,6 +128,7 @@ gm107_ltcg_init(struct nouveau_object *object)

 	nv_wr32(priv, 0x17e27c, priv->ltc_nr);
 	nv_wr32(priv, 0x17e278, priv->tag_base);
+	nv_mask(priv, 0x17e264, 0x00000002, lpg128 ? 0x00000002 : 0x00000000);
 	return 0;
 }

--
2.1.0