6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ben Skeggs bskeggs@nvidia.com
commit 6db9df4f7055eb4ea339e7b83ca676edd9ec1277 upstream.
init() was removed from ramgp102 when reworking the memory detection, as it was thought that the code was only necessary when the driver performs mclk changes, which nouveau doesn't support on pascal.
However, it turns out that we still need to execute this on some GPUs to restore settings after DEVINIT, so revert to the original behaviour.
v2: fix tags in commit message, cc stable
Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/319 Fixes: 2c0c15a22fa0 ("drm/nouveau/fb/gp102-ga100: switch to simpler vram size detection method") Cc: stable@vger.kernel.org # 6.6+ Signed-off-by: Ben Skeggs bskeggs@nvidia.com Signed-off-by: Danilo Krummrich dakr@kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20240904232418.8590-1-bskeggs@... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/nouveau/nvkm/subdev/fb/ram.h | 2 ++ drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp100.c | 2 +- drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp102.c | 1 + 3 files changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ram.h +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ram.h @@ -46,6 +46,8 @@ u32 gm107_ram_probe_fbp(const struct nvk u32 gm200_ram_probe_fbp_amount(const struct nvkm_ram_func *, u32, struct nvkm_device *, int, int *);
+int gp100_ram_init(struct nvkm_ram *); + /* RAM type-specific MR calculation routines */ int nvkm_sddr2_calc(struct nvkm_ram *); int nvkm_sddr3_calc(struct nvkm_ram *); --- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp100.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp100.c @@ -27,7 +27,7 @@ #include <subdev/bios/init.h> #include <subdev/bios/rammap.h>
-static int +int gp100_ram_init(struct nvkm_ram *ram) { struct nvkm_subdev *subdev = &ram->fb->subdev; --- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp102.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp102.c @@ -5,6 +5,7 @@
static const struct nvkm_ram_func gp102_ram = { + .init = gp100_ram_init, };
int