Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history
yaml
---
r: 307007
b: refs/heads/master
c: 489fbc1
h: refs/heads/master
i:
  307005: 917a62e
  307003: 7c40092
  306999: 730cd99
  306991: d34d12e
  306975: c3ac899
  306943: ec5cdaa
v: v3
  • Loading branch information
Daniel Kurtz authored and Daniel Vetter committed Mar 28, 2012
1 parent 6167b08 commit 19bf927
Show file tree
Hide file tree
Showing 2 changed files with 35 additions and 27 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: e4fd17af6156b46fae3f9115830e1a35a62cd8e7
refs/heads/master: 489fbc107f5fb041d598f30f367ea3ca714ff133
60 changes: 34 additions & 26 deletions trunk/drivers/gpu/drm/i915/intel_i2c.c
Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,35 @@ static void set_data(void *data, int state_high)
POSTING_READ(bus->gpio_reg);
}

static int
intel_gpio_pre_xfer(struct i2c_adapter *adapter)
{
struct intel_gmbus *bus = container_of(adapter,
struct intel_gmbus,
adapter);
struct drm_i915_private *dev_priv = bus->dev_priv;

intel_i2c_reset(dev_priv->dev);
intel_i2c_quirk_set(dev_priv, true);
set_data(bus, 1);
set_clock(bus, 1);
udelay(I2C_RISEFALL_TIME);
return 0;
}

static void
intel_gpio_post_xfer(struct i2c_adapter *adapter)
{
struct intel_gmbus *bus = container_of(adapter,
struct intel_gmbus,
adapter);
struct drm_i915_private *dev_priv = bus->dev_priv;

set_data(bus, 1);
set_clock(bus, 1);
intel_i2c_quirk_set(dev_priv, false);
}

static bool
intel_gpio_setup(struct intel_gmbus *bus, u32 pin)
{
Expand Down Expand Up @@ -166,37 +195,15 @@ intel_gpio_setup(struct intel_gmbus *bus, u32 pin)
algo->setscl = set_clock;
algo->getsda = get_data;
algo->getscl = get_clock;
algo->pre_xfer = intel_gpio_pre_xfer;
algo->post_xfer = intel_gpio_post_xfer;
algo->udelay = I2C_RISEFALL_TIME;
algo->timeout = usecs_to_jiffies(2200);
algo->data = bus;

return true;
}

static int
intel_i2c_quirk_xfer(struct intel_gmbus *bus,
struct i2c_msg *msgs,
int num)
{
struct drm_i915_private *dev_priv = bus->dev_priv;
int ret;

intel_i2c_reset(dev_priv->dev);

intel_i2c_quirk_set(dev_priv, true);
set_data(bus, 1);
set_clock(bus, 1);
udelay(I2C_RISEFALL_TIME);

ret = i2c_bit_algo.master_xfer(&bus->adapter, msgs, num);

set_data(bus, 1);
set_clock(bus, 1);
intel_i2c_quirk_set(dev_priv, false);

return ret;
}

static int
gmbus_xfer_read(struct drm_i915_private *dev_priv, struct i2c_msg *msg,
bool last)
Expand Down Expand Up @@ -287,7 +294,7 @@ gmbus_xfer(struct i2c_adapter *adapter,
mutex_lock(&dev_priv->gmbus_mutex);

if (bus->force_bit) {
ret = intel_i2c_quirk_xfer(bus, msgs, num);
ret = i2c_bit_algo.master_xfer(adapter, msgs, num);
goto out;
}

Expand Down Expand Up @@ -351,8 +358,9 @@ gmbus_xfer(struct i2c_adapter *adapter,
ret = -EIO;
} else {
bus->force_bit = true;
ret = intel_i2c_quirk_xfer(bus, msgs, num);
ret = i2c_bit_algo.master_xfer(adapter, msgs, num);
}

out:
mutex_unlock(&dev_priv->gmbus_mutex);
return ret;
Expand Down

0 comments on commit 19bf927

Please sign in to comment.