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drm/nouveau/core: add engine method to assist in determining chsw direction

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FIFO gives us load/save/switch status, and we need to be able to determine
which direction a "switch" is failing during channel recovery.

In order to do this, we apparently need to query the engine itself.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2017-01-16 10:22:59 +10:00
parent 84cd0a5565
commit 17041c7eef
2 changed files with 10 additions and 0 deletions
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2
drivers/gpu/drm/nouveau/include/nvkm/core/engine.h
View File

@ -20,6 +20,7 @@ struct nvkm_engine_func {
int (*fini)(struct nvkm_engine *, bool suspend);
void (*intr)(struct nvkm_engine *);
void (*tile)(struct nvkm_engine *, int region, struct nvkm_fb_tile *);
bool (*chsw_load)(struct nvkm_engine *);
struct {
int (*sclass)(struct nvkm_oclass *, int index,
@ -44,4 +45,5 @@ int nvkm_engine_new_(const struct nvkm_engine_func *, struct nvkm_device *,
struct nvkm_engine *nvkm_engine_ref(struct nvkm_engine *);
void nvkm_engine_unref(struct nvkm_engine **);
void nvkm_engine_tile(struct nvkm_engine *, int region);
bool nvkm_engine_chsw_load(struct nvkm_engine *);
#endif

8
drivers/gpu/drm/nouveau/nvkm/core/engine.c
View File

@ -27,6 +27,14 @@
#include <subdev/fb.h>
bool
nvkm_engine_chsw_load(struct nvkm_engine *engine)
{
if (engine->func->chsw_load)
return engine->func->chsw_load(engine);
return false;
}
void
nvkm_engine_unref(struct nvkm_engine **pengine)
{