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authorKeith Packard <keithp@keithp.com>2009-05-30 12:16:25 -0700
committerKeith Packard <keithp@keithp.com>2009-06-18 15:53:57 -0700
commitf9c10a9b96a31b4a82a4fa807400c04f00284068 (patch)
treed49abf9846d0177aad3b317da1ea98d9ad129ca6 /drivers/gpu/drm/i915/dvo_ivch.c
parentb99e228d354cc1e7f19fb8b5f1297d493e309186 (diff)
downloadlinux-2.6.38-lt-ux500-f9c10a9b96a31b4a82a4fa807400c04f00284068.tar.gz
drm/i915: Change I2C api to pass around i2c_adapters
The existing API passed around intel_i2c_chan pointers, which are dependent on the i2c bit-banging algo. This precluded the driver from using outputs which use a different algo. Switching to the more general i2c_adpater allows the driver to support non bit-banging DDC. This also required moving the slave address into the output private structures. Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu/drm/i915/dvo_ivch.c')
-rw-r--r--drivers/gpu/drm/i915/dvo_ivch.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/dvo_ivch.c b/drivers/gpu/drm/i915/dvo_ivch.c
index 0c8d375e8e3..aa176f9921f 100644
--- a/drivers/gpu/drm/i915/dvo_ivch.c
+++ b/drivers/gpu/drm/i915/dvo_ivch.c
@@ -169,13 +169,14 @@ static void ivch_dump_regs(struct intel_dvo_device *dvo);
static bool ivch_read(struct intel_dvo_device *dvo, int addr, uint16_t *data)
{
struct ivch_priv *priv = dvo->dev_priv;
- struct intel_i2c_chan *i2cbus = dvo->i2c_bus;
+ struct i2c_adapter *adapter = dvo->i2c_bus;
+ struct intel_i2c_chan *i2cbus = container_of(adapter, struct intel_i2c_chan, adapter);
u8 out_buf[1];
u8 in_buf[2];
struct i2c_msg msgs[] = {
{
- .addr = i2cbus->slave_addr,
+ .addr = dvo->slave_addr,
.flags = I2C_M_RD,
.len = 0,
},
@@ -186,7 +187,7 @@ static bool ivch_read(struct intel_dvo_device *dvo, int addr, uint16_t *data)
.buf = out_buf,
},
{
- .addr = i2cbus->slave_addr,
+ .addr = dvo->slave_addr,
.flags = I2C_M_RD | I2C_M_NOSTART,
.len = 2,
.buf = in_buf,
@@ -202,7 +203,7 @@ static bool ivch_read(struct intel_dvo_device *dvo, int addr, uint16_t *data)
if (!priv->quiet) {
DRM_DEBUG("Unable to read register 0x%02x from %s:%02x.\n",
- addr, i2cbus->adapter.name, i2cbus->slave_addr);
+ addr, i2cbus->adapter.name, dvo->slave_addr);
}
return false;
}
@@ -211,10 +212,11 @@ static bool ivch_read(struct intel_dvo_device *dvo, int addr, uint16_t *data)
static bool ivch_write(struct intel_dvo_device *dvo, int addr, uint16_t data)
{
struct ivch_priv *priv = dvo->dev_priv;
- struct intel_i2c_chan *i2cbus = dvo->i2c_bus;
+ struct i2c_adapter *adapter = dvo->i2c_bus;
+ struct intel_i2c_chan *i2cbus = container_of(adapter, struct intel_i2c_chan, adapter);
u8 out_buf[3];
struct i2c_msg msg = {
- .addr = i2cbus->slave_addr,
+ .addr = dvo->slave_addr,
.flags = 0,
.len = 3,
.buf = out_buf,
@@ -229,7 +231,7 @@ static bool ivch_write(struct intel_dvo_device *dvo, int addr, uint16_t data)
if (!priv->quiet) {
DRM_DEBUG("Unable to write register 0x%02x to %s:%d.\n",
- addr, i2cbus->adapter.name, i2cbus->slave_addr);
+ addr, i2cbus->adapter.name, dvo->slave_addr);
}
return false;
@@ -237,7 +239,7 @@ static bool ivch_write(struct intel_dvo_device *dvo, int addr, uint16_t data)
/** Probes the given bus and slave address for an ivch */
static bool ivch_init(struct intel_dvo_device *dvo,
- struct intel_i2c_chan *i2cbus)
+ struct i2c_adapter *adapter)
{
struct ivch_priv *priv;
uint16_t temp;
@@ -246,8 +248,7 @@ static bool ivch_init(struct intel_dvo_device *dvo,
if (priv == NULL)
return false;
- dvo->i2c_bus = i2cbus;
- dvo->i2c_bus->slave_addr = dvo->slave_addr;
+ dvo->i2c_bus = adapter;
dvo->dev_priv = priv;
priv->quiet = true;