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drm/nouveau/fb/gp100-: disable address remapper

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This was causing problems on a system with a large amount of RAM, where
display push buffers were being fetched incorrectly when placed in high
system memory addresses.

While this commit will resolve the issue on that particular system, the
issue will be avoided completely with another patch to more fully solve
problems with display and large amounts of system memory on Pascal.

It's still probably a good idea to disable this to prevent weird issues
in the future.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2018-07-18 16:10:58 +10:00
parent eb493fbc15
commit 2f958e8240
4 changed files with 15 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c
View file

@ -140,6 +140,9 @@ nvkm_fb_init(struct nvkm_subdev *subdev)
if (fb->func->init)
fb->func->init(fb);
if (fb->func->init_remapper)
fb->func->init_remapper(fb);
if (fb->func->init_page) {
ret = fb->func->init_page(fb);
if (WARN_ON(ret))

9
drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp100.c
View file

@ -36,6 +36,14 @@ gp100_fb_init_unkn(struct nvkm_fb *base)
nvkm_wr32(device, 0x1faccc, nvkm_rd32(device, 0x100ccc));
}
void
gp100_fb_init_remapper(struct nvkm_fb *fb)
{
struct nvkm_device *device = fb->subdev.device;
/* Disable address remapper. */
nvkm_mask(device, 0x100c14, 0x00040000, 0x00000000);
}
void
gp100_fb_init(struct nvkm_fb *base)
{
@ -56,6 +64,7 @@ gp100_fb = {
.dtor = gf100_fb_dtor,
.oneinit = gf100_fb_oneinit,
.init = gp100_fb_init,
.init_remapper = gp100_fb_init_remapper,
.init_page = gm200_fb_init_page,
.init_unkn = gp100_fb_init_unkn,
.ram_new = gp100_ram_new,

1
drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp102.c
View file

@ -31,6 +31,7 @@ gp102_fb = {
.dtor = gf100_fb_dtor,
.oneinit = gf100_fb_oneinit,
.init = gp100_fb_init,
.init_remapper = gp100_fb_init_remapper,
.init_page = gm200_fb_init_page,
.ram_new = gp100_ram_new,
};

2
drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h
View file

@ -11,6 +11,7 @@ struct nvkm_fb_func {
u32 (*tags)(struct nvkm_fb *);
int (*oneinit)(struct nvkm_fb *);
void (*init)(struct nvkm_fb *);
void (*init_remapper)(struct nvkm_fb *);
int (*init_page)(struct nvkm_fb *);
void (*init_unkn)(struct nvkm_fb *);
void (*intr)(struct nvkm_fb *);
@ -69,5 +70,6 @@ int gf100_fb_init_page(struct nvkm_fb *);
int gm200_fb_init_page(struct nvkm_fb *);
void gp100_fb_init_remapper(struct nvkm_fb *);
void gp100_fb_init_unkn(struct nvkm_fb *);
#endif