diff options
| author | Tony Lindgren <tony@atomide.com> | 2019-05-20 08:32:11 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2019-05-20 08:32:11 -0700 |
| commit | f29f24b5568fd6169e0363c78f1a80db38d0e7e9 (patch) | |
| tree | 835abaf6e1bb95b9d388f4249f355618e9da1489 /drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.c | |
| parent | 1ba12322e2f0934383f111a5e695702aaf46b812 (diff) | |
| parent | 34b1b8061de3215208db9accfe60cc3f5b40178f (diff) | |
| download | talos-op-linux-f29f24b5568fd6169e0363c78f1a80db38d0e7e9.tar.gz talos-op-linux-f29f24b5568fd6169e0363c78f1a80db38d0e7e9.zip | |
Merge branch 'fixes-dra7' into fixes
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.c index 807a2b67bd64..ed50cc3736b9 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.c @@ -110,6 +110,19 @@ nvkm_i2c_bus_init(struct nvkm_i2c_bus *bus) BUS_TRACE(bus, "init"); if (bus->func->init) bus->func->init(bus); + + mutex_lock(&bus->mutex); + bus->enabled = true; + mutex_unlock(&bus->mutex); +} + +void +nvkm_i2c_bus_fini(struct nvkm_i2c_bus *bus) +{ + BUS_TRACE(bus, "fini"); + mutex_lock(&bus->mutex); + bus->enabled = false; + mutex_unlock(&bus->mutex); } void @@ -126,9 +139,15 @@ nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *bus) { struct nvkm_i2c_pad *pad = bus->pad; int ret; + BUS_TRACE(bus, "acquire"); mutex_lock(&bus->mutex); - ret = nvkm_i2c_pad_acquire(pad, NVKM_I2C_PAD_I2C); + + if (bus->enabled) + ret = nvkm_i2c_pad_acquire(pad, NVKM_I2C_PAD_I2C); + else + ret = -EIO; + if (ret) mutex_unlock(&bus->mutex); return ret; |
