[Nouveau] [PATCH] devinit: lock/unlock crtc regs for all devices, not just pre-nv50

[Ilia Mirkin]

Also make nv_lockvgac work for nv50+ devices. This should fix IO_CONDITION and
related VBIOS opcodes that read/write the crtc regs.

See https://bugs.freedesktop.org/show_bug.cgi?id=60680

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---

Ben, is this what you had in mind? I haven't gotten a chance to test this yet
since your tree doesn't build against mine (which is largely based on
nouveau/linux-2.6 master + drm-nouveau-next patches merged in). Something
about nouveau_acpi/backlight.

Pekka, mind testing this out and see if it also fixes your issue? Grab Ben's
tree at http://cgit.freedesktop.org/~darktama/nouveau/ and apply this patch,
and build against a late 3.13-rcX release, I guess. (Still haven't figured out
which tree I need to have for this stuff to build.)

./autogen.sh; cd drm; make

should generate a nouveau.ko against your currently-running kernel.

 nvkm/engine/disp/vga.c     |  9 +++++++--
 nvkm/subdev/devinit/base.c | 14 ++++++++++++++
 nvkm/subdev/devinit/nv04.c | 13 ++++++++-----
 nvkm/subdev/devinit/priv.h |  8 +++++---
 4 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/nvkm/engine/disp/vga.c b/nvkm/engine/disp/vga.c
index 5a1c684..8836c3c 100644
--- a/nvkm/engine/disp/vga.c
+++ b/nvkm/engine/disp/vga.c
@@ -138,10 +138,15 @@ nv_wrvgai(void *obj, int head, u16 port, u8 index, u8 value)
 bool
 nv_lockvgac(void *obj, bool lock)
 {
+	struct nouveau_device *dev = nv_device(obj);
+
 	bool locked = !nv_rdvgac(obj, 0, 0x1f);
 	u8 data = lock ? 0x99 : 0x57;
-	nv_wrvgac(obj, 0, 0x1f, data);
-	if (nv_device(obj)->chipset == 0x11) {
+	if (dev->card_type < NV_50)
+		nv_wrvgac(obj, 0, 0x1f, data);
+	else
+		nv_wrvgac(obj, 0, 0x3f, data);
+	if (dev->chipset == 0x11) {
 		if (!(nv_rd32(obj, 0x001084) & 0x10000000))
 			nv_wrvgac(obj, 1, 0x1f, data);
 	}
diff --git a/nvkm/subdev/devinit/base.c b/nvkm/subdev/devinit/base.c
index 6b23d9a..a4df3fa 100644
--- a/nvkm/subdev/devinit/base.c
+++ b/nvkm/subdev/devinit/base.c
@@ -26,6 +26,7 @@
 
 #include <subdev/bios.h>
 #include <subdev/bios/init.h>
+#include <subdev/vga.h>
 
 #include "priv.h"
 
@@ -38,6 +39,9 @@ _nouveau_devinit_fini(struct nouveau_object *object, bool suspend)
 	if (suspend)
 		devinit->post = true;
 
+	/* unlock the extended vga crtc regs */
+	nv_lockvgac(devinit, false);
+
 	return nouveau_subdev_fini(&devinit->base, suspend);
 }
 
@@ -61,6 +65,16 @@ _nouveau_devinit_init(struct nouveau_object *object)
 	return 0;
 }
 
+void
+_nouveau_devinit_dtor(struct nouveau_object *object)
+{
+	struct nouveau_devinit *devinit = (void *)object;
+
+	/* lock crtc regs */
+	nv_lockvgac(devinit, true);
+	nouveau_subdev_destroy(&devinit->base);
+}
+
 int
 nouveau_devinit_create_(struct nouveau_object *parent,
 			struct nouveau_object *engine,
diff --git a/nvkm/subdev/devinit/nv04.c b/nvkm/subdev/devinit/nv04.c
index 24025e4..7037eae 100644
--- a/nvkm/subdev/devinit/nv04.c
+++ b/nvkm/subdev/devinit/nv04.c
@@ -388,17 +388,21 @@ int
 nv04_devinit_fini(struct nouveau_object *object, bool suspend)
 {
 	struct nv04_devinit_priv *priv = (void *)object;
+	int ret;
 
 	/* make i2c busses accessible */
 	nv_mask(priv, 0x000200, 0x00000001, 0x00000001);
 
-	/* unlock extended vga crtc regs, and unslave crtcs */
-	nv_lockvgac(priv, false);
+	ret = nouveau_devinit_fini(&priv->base, suspend);
+	if (ret)
+		return ret;
+
+	/* unslave crtcs */
 	if (priv->owner < 0)
 		priv->owner = nv_rdvgaowner(priv);
 	nv_wrvgaowner(priv, 0);
 
-	return nouveau_devinit_fini(&priv->base, suspend);
+	return 0;
 }
 
 int
@@ -426,9 +430,8 @@ nv04_devinit_dtor(struct nouveau_object *object)
 {
 	struct nv04_devinit_priv *priv = (void *)object;
 
-	/* restore vga owner saved at first init, and lock crtc regs  */
+	/* restore vga owner saved at first init */
 	nv_wrvgaowner(priv, priv->owner);
-	nv_lockvgac(priv, true);
 
 	nouveau_devinit_destroy(&priv->base);
 }
diff --git a/nvkm/subdev/devinit/priv.h b/nvkm/subdev/devinit/priv.h
index c4179b6..822a2fb 100644
--- a/nvkm/subdev/devinit/priv.h
+++ b/nvkm/subdev/devinit/priv.h
@@ -15,8 +15,10 @@ struct nouveau_devinit_impl {
 
 #define nouveau_devinit_create(p,e,o,d)                                        \
 	nouveau_devinit_create_((p), (e), (o), sizeof(**d), (void **)d)
-#define nouveau_devinit_destroy(p)                                             \
-	nouveau_subdev_destroy(&(p)->base)
+#define nouveau_devinit_destroy(p) ({                                          \
+	struct nouveau_devinit *d = (p);                                       \
+	_nouveau_devinit_dtor(nv_object(d));                                   \
+})
 #define nouveau_devinit_init(p) ({                                             \
 	struct nouveau_devinit *d = (p);                                       \
 	_nouveau_devinit_init(nv_object(d));                                   \
@@ -28,7 +30,7 @@ struct nouveau_devinit_impl {
 
 int nouveau_devinit_create_(struct nouveau_object *, struct nouveau_object *,
 			    struct nouveau_oclass *, int, void **);
-#define _nouveau_devinit_dtor _nouveau_subdev_dtor
+void _nouveau_devinit_dtor(struct nouveau_object *);
 int _nouveau_devinit_init(struct nouveau_object *);
 int _nouveau_devinit_fini(struct nouveau_object *, bool suspend);
 
-- 
1.8.3.2