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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-12 18:32:30 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-12 18:32:30 (GMT) |
commit | 682b7c1c8ea8885aa681ddf530d6cf2ad4f2dc15 (patch) | |
tree | 882003bb4fc56af816246168f8c85d6dde8c6ed9 /drivers/gpu/drm/nouveau/core/subdev/i2c/base.c | |
parent | 16b9057804c02e2d351e9c8f606e909b43cbd9e7 (diff) | |
parent | bc1dfff04a5d4064ba0db1fab13f84ab4f333d2b (diff) | |
download | linux-682b7c1c8ea8885aa681ddf530d6cf2ad4f2dc15.tar.xz |
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm updates from Dave Airlie:
"This is the main drm merge window pull request, changes all over the
place, mostly normal levels of churn.
Highlights:
Core drm:
More cleanups, fix race on connector/encoder naming, docs updates,
object locking rework in prep for atomic modeset
i915:
mipi DSI support, valleyview power fixes, cursor size fixes,
execlist refactoring, vblank improvements, userptr support, OOM
handling improvements
radeon:
GPUVM tuning and large page size support, gart fixes, deep color
HDMI support, HDMI audio cleanups
nouveau:
- displayport rework should fix lots of issues
- initial gk20a support
- gk110b support
- gk208 fixes
exynos:
probe order fixes, HDMI changes, IPP consolidation
msm:
debugfs updates, misc fixes
ast:
ast2400 support, sync with UMS driver
tegra:
cleanups, hdmi + hw cursor for Tegra 124.
panel:
fixes existing panels add some new ones.
ipuv3:
moved from staging to drivers/gpu"
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (761 commits)
drm/nouveau/disp/dp: fix tmds passthrough on dp connector
drm/nouveau/dp: probe dpcd to determine connectedness
drm/nv50-: trigger update after all connectors disabled
drm/nv50-: prepare for attaching a SOR to multiple heads
drm/gf119-/disp: fix debug output on update failure
drm/nouveau/disp/dp: make use of postcursor when its available
drm/g94-/disp/dp: take max pullup value across all lanes
drm/nouveau/bios/dp: parse lane postcursor data
drm/nouveau/dp: fix support for dpms
drm/nouveau: register a drm_dp_aux channel for each dp connector
drm/g94-/disp: add method to power-off dp lanes
drm/nouveau/disp/dp: maintain link in response to hpd signal
drm/g94-/disp: bash and wait for something after changing lane power regs
drm/nouveau/disp/dp: split link config/power into two steps
drm/nv50/disp: train PIOR-attached DP from second supervisor
drm/nouveau/disp/dp: make use of existing output data for link training
drm/gf119/disp: start removing direct vbios parsing from supervisor
drm/nv50/disp: start removing direct vbios parsing from supervisor
drm/nouveau/disp/dp: maintain receiver caps in response to hpd signal
drm/nouveau/disp/dp: create subclass for dp outputs
...
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/i2c/base.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/i2c/base.c | 212 |
1 files changed, 201 insertions, 11 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c index 378e05b..09ba2cc 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c @@ -23,13 +23,16 @@ */ #include <core/option.h> +#include <core/event.h> #include <subdev/bios.h> #include <subdev/bios/dcb.h> #include <subdev/bios/i2c.h> -#include <subdev/i2c.h> #include <subdev/vga.h> +#include "priv.h" +#include "pad.h" + /****************************************************************************** * interface to linux i2c bit-banging algorithm *****************************************************************************/ @@ -45,9 +48,15 @@ nouveau_i2c_pre_xfer(struct i2c_adapter *adap) { struct i2c_algo_bit_data *bit = adap->algo_data; struct nouveau_i2c_port *port = bit->data; - if (port->func->acquire) - port->func->acquire(port); - return 0; + return nouveau_i2c(port)->acquire(port, bit->timeout); +} + +static void +nouveau_i2c_post_xfer(struct i2c_adapter *adap) +{ + struct i2c_algo_bit_data *bit = adap->algo_data; + struct nouveau_i2c_port *port = bit->data; + return nouveau_i2c(port)->release(port); } static void @@ -82,6 +91,15 @@ nouveau_i2c_getsda(void *data) * base i2c "port" class implementation *****************************************************************************/ +int +_nouveau_i2c_port_fini(struct nouveau_object *object, bool suspend) +{ + struct nouveau_i2c_port *port = (void *)object; + struct nvkm_i2c_pad *pad = nvkm_i2c_pad(port); + nv_ofuncs(pad)->fini(nv_object(pad), suspend); + return nouveau_object_fini(&port->base, suspend); +} + void _nouveau_i2c_port_dtor(struct nouveau_object *object) { @@ -98,7 +116,7 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, const struct nouveau_i2c_func *func, int size, void **pobject) { - struct nouveau_device *device = nv_device(parent); + struct nouveau_device *device = nv_device(engine); struct nouveau_i2c *i2c = (void *)engine; struct nouveau_i2c_port *port; int ret; @@ -113,8 +131,9 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, port->adapter.owner = THIS_MODULE; port->adapter.dev.parent = nv_device_base(device); port->index = index; + port->aux = -1; port->func = func; - i2c_set_adapdata(&port->adapter, i2c); + mutex_init(&port->mutex); if ( algo == &nouveau_i2c_bit_algo && !nouveau_boolopt(device->cfgopt, "NvI2C", CSTMSEL)) { @@ -128,6 +147,7 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, bit->timeout = usecs_to_jiffies(2200); bit->data = port; bit->pre_xfer = nouveau_i2c_pre_xfer; + bit->post_xfer = nouveau_i2c_post_xfer; bit->setsda = nouveau_i2c_setsda; bit->setscl = nouveau_i2c_setscl; bit->getsda = nouveau_i2c_getsda; @@ -141,7 +161,6 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, ret = i2c_add_adapter(&port->adapter); } - /* drop port's i2c subdev refcount, i2c handles this itself */ if (ret == 0) list_add_tail(&port->head, &i2c->ports); return ret; @@ -193,6 +212,75 @@ nouveau_i2c_find_type(struct nouveau_i2c *i2c, u16 type) return NULL; } +static void +nouveau_i2c_release_pad(struct nouveau_i2c_port *port) +{ + struct nvkm_i2c_pad *pad = nvkm_i2c_pad(port); + struct nouveau_i2c *i2c = nouveau_i2c(port); + + if (atomic_dec_and_test(&nv_object(pad)->usecount)) { + nv_ofuncs(pad)->fini(nv_object(pad), false); + wake_up_all(&i2c->wait); + } +} + +static int +nouveau_i2c_try_acquire_pad(struct nouveau_i2c_port *port) +{ + struct nvkm_i2c_pad *pad = nvkm_i2c_pad(port); + + if (atomic_add_return(1, &nv_object(pad)->usecount) != 1) { + struct nouveau_object *owner = (void *)pad->port; + do { + if (owner == (void *)port) + return 0; + owner = owner->parent; + } while(owner); + nouveau_i2c_release_pad(port); + return -EBUSY; + } + + pad->next = port; + nv_ofuncs(pad)->init(nv_object(pad)); + return 0; +} + +static int +nouveau_i2c_acquire_pad(struct nouveau_i2c_port *port, unsigned long timeout) +{ + struct nouveau_i2c *i2c = nouveau_i2c(port); + + if (timeout) { + if (wait_event_timeout(i2c->wait, + nouveau_i2c_try_acquire_pad(port) == 0, + timeout) == 0) + return -EBUSY; + } else { + wait_event(i2c->wait, nouveau_i2c_try_acquire_pad(port) == 0); + } + + return 0; +} + +static void +nouveau_i2c_release(struct nouveau_i2c_port *port) +__releases(pad->mutex) +{ + nouveau_i2c(port)->release_pad(port); + mutex_unlock(&port->mutex); +} + +static int +nouveau_i2c_acquire(struct nouveau_i2c_port *port, unsigned long timeout) +__acquires(pad->mutex) +{ + int ret; + mutex_lock(&port->mutex); + if ((ret = nouveau_i2c(port)->acquire_pad(port, timeout))) + mutex_unlock(&port->mutex); + return ret; +} + static int nouveau_i2c_identify(struct nouveau_i2c *i2c, int index, const char *what, struct nouveau_i2c_board_info *info, @@ -237,11 +325,59 @@ nouveau_i2c_identify(struct nouveau_i2c *i2c, int index, const char *what, return -ENODEV; } +static void +nouveau_i2c_intr_disable(struct nouveau_event *event, int type, int index) +{ + struct nouveau_i2c *i2c = nouveau_i2c(event->priv); + struct nouveau_i2c_port *port = i2c->find(i2c, index); + const struct nouveau_i2c_impl *impl = (void *)nv_object(i2c)->oclass; + if (port && port->aux >= 0) + impl->aux_mask(i2c, type, 1 << port->aux, 0); +} + +static void +nouveau_i2c_intr_enable(struct nouveau_event *event, int type, int index) +{ + struct nouveau_i2c *i2c = nouveau_i2c(event->priv); + struct nouveau_i2c_port *port = i2c->find(i2c, index); + const struct nouveau_i2c_impl *impl = (void *)nv_object(i2c)->oclass; + if (port && port->aux >= 0) + impl->aux_mask(i2c, type, 1 << port->aux, 1 << port->aux); +} + +static void +nouveau_i2c_intr(struct nouveau_subdev *subdev) +{ + struct nouveau_i2c_impl *impl = (void *)nv_oclass(subdev); + struct nouveau_i2c *i2c = nouveau_i2c(subdev); + struct nouveau_i2c_port *port; + u32 hi, lo, rq, tx, e; + + if (impl->aux_stat) { + impl->aux_stat(i2c, &hi, &lo, &rq, &tx); + if (hi || lo || rq || tx) { + list_for_each_entry(port, &i2c->ports, head) { + if (e = 0, port->aux < 0) + continue; + + if (hi & (1 << port->aux)) e |= NVKM_I2C_PLUG; + if (lo & (1 << port->aux)) e |= NVKM_I2C_UNPLUG; + if (rq & (1 << port->aux)) e |= NVKM_I2C_IRQ; + if (tx & (1 << port->aux)) e |= NVKM_I2C_DONE; + + nouveau_event_trigger(i2c->ntfy, e, port->index); + } + } + } +} + int _nouveau_i2c_fini(struct nouveau_object *object, bool suspend) { + struct nouveau_i2c_impl *impl = (void *)nv_oclass(object); struct nouveau_i2c *i2c = (void *)object; struct nouveau_i2c_port *port; + u32 mask; int ret; list_for_each_entry(port, &i2c->ports, head) { @@ -250,6 +386,11 @@ _nouveau_i2c_fini(struct nouveau_object *object, bool suspend) goto fail; } + if ((mask = (1 << impl->aux) - 1), impl->aux_stat) { + impl->aux_mask(i2c, NVKM_I2C_ANY, mask, 0); + impl->aux_stat(i2c, &mask, &mask, &mask, &mask); + } + return nouveau_subdev_fini(&i2c->base, suspend); fail: list_for_each_entry_continue_reverse(port, &i2c->ports, head) { @@ -290,6 +431,8 @@ _nouveau_i2c_dtor(struct nouveau_object *object) struct nouveau_i2c *i2c = (void *)object; struct nouveau_i2c_port *port, *temp; + nouveau_event_destroy(&i2c->ntfy); + list_for_each_entry_safe(port, temp, &i2c->ports, head) { nouveau_object_ref(NULL, (struct nouveau_object **)&port); } @@ -306,14 +449,14 @@ int nouveau_i2c_create_(struct nouveau_object *parent, struct nouveau_object *engine, struct nouveau_oclass *oclass, - struct nouveau_oclass *sclass, int length, void **pobject) { + const struct nouveau_i2c_impl *impl = (void *)oclass; struct nouveau_bios *bios = nouveau_bios(parent); struct nouveau_i2c *i2c; struct nouveau_object *object; struct dcb_i2c_entry info; - int ret, i, j, index = -1; + int ret, i, j, index = -1, pad; struct dcb_output outp; u8 ver, hdr; u32 data; @@ -324,24 +467,48 @@ nouveau_i2c_create_(struct nouveau_object *parent, if (ret) return ret; + nv_subdev(i2c)->intr = nouveau_i2c_intr; i2c->find = nouveau_i2c_find; i2c->find_type = nouveau_i2c_find_type; + i2c->acquire_pad = nouveau_i2c_acquire_pad; + i2c->release_pad = nouveau_i2c_release_pad; + i2c->acquire = nouveau_i2c_acquire; + i2c->release = nouveau_i2c_release; i2c->identify = nouveau_i2c_identify; + init_waitqueue_head(&i2c->wait); INIT_LIST_HEAD(&i2c->ports); while (!dcb_i2c_parse(bios, ++index, &info)) { if (info.type == DCB_I2C_UNUSED) continue; - oclass = sclass; + if (info.share != DCB_I2C_UNUSED) { + if (info.type == DCB_I2C_NVIO_AUX) + pad = info.drive; + else + pad = info.share; + oclass = impl->pad_s; + } else { + pad = 0x100 + info.drive; + oclass = impl->pad_x; + } + + ret = nouveau_object_ctor(NULL, *pobject, oclass, + NULL, pad, &parent); + if (ret < 0) + continue; + + oclass = impl->sclass; do { ret = -EINVAL; if (oclass->handle == info.type) { - ret = nouveau_object_ctor(*pobject, *pobject, + ret = nouveau_object_ctor(parent, *pobject, oclass, &info, index, &object); } } while (ret && (++oclass)->handle); + + nouveau_object_ref(NULL, &parent); } /* in addition to the busses specified in the i2c table, there @@ -380,5 +547,28 @@ nouveau_i2c_create_(struct nouveau_object *parent, } } + ret = nouveau_event_create(4, index, &i2c->ntfy); + if (ret) + return ret; + + i2c->ntfy->priv = i2c; + i2c->ntfy->enable = nouveau_i2c_intr_enable; + i2c->ntfy->disable = nouveau_i2c_intr_disable; + return 0; +} + +int +_nouveau_i2c_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct nouveau_i2c *i2c; + int ret; + + ret = nouveau_i2c_create(parent, engine, oclass, &i2c); + *pobject = nv_object(i2c); + if (ret) + return ret; + return 0; } |