diff options
| author | Timur Tabi <ttabi@nvidia.com> | 2026-05-01 01:38:35 +0300 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-05-28 20:30:15 +0300 |
| commit | c1cf2d5db80ce91a85855bbaf4da85ff603e089a (patch) | |
| tree | 05242067194864a4b6fa881c2e1fc1bd47dcafe7 /drivers | |
| parent | 16d4747cd152861fef8d5323c6c1d3ed96c3d102 (diff) | |
| download | linux-c1cf2d5db80ce91a85855bbaf4da85ff603e089a.tar.xz | |
drm/nouveau/bios: specify correct display fuse register for Ampere and Ada
The NV_FUSE_STATUS_OPT_DISPLAY register is used to determine whether
the GPU has display hardware. The current code that normally reads
this register is instead hard-coded to check for GA100 vs later GPUs.
Since this function is called only on pre-Hopper GPUs, and this
if-statement applies only to GA100 and later, the check works
because GA100 is the only non-display Ampere and Ada GPU.
However, there actually is a register that can be read, so we should
use it.
Fixes: a34632482f1e ("drm/nouveau/bios/ga10[024]: initial support")
Signed-off-by: Timur Tabi <ttabi@nvidia.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://patch.msgid.link/20260430223838.2530778-8-ttabi@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c index d5411d176e3a..0d9e6cdd6119 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c @@ -65,13 +65,14 @@ pramin_init(struct nvkm_bios *bios, const char *name) /* we can't get the bios image pointer without PDISP */ if (device->card_type >= GA100) - addr = device->chipset == 0x170; /*XXX: find the fuse reg for this */ + addr = nvkm_rd32(device, 0x820c04); else if (device->card_type >= GM100) addr = nvkm_rd32(device, 0x021c04); else if (device->card_type >= NV_C0) addr = nvkm_rd32(device, 0x022500); + if (addr & 0x00000001) { nvkm_debug(subdev, "... display disabled\n"); return ERR_PTR(-ENODEV); |