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>
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 9a00adb..13c39c8 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -38,8 +38,8 @@
#undef SDVO_DEBUG
#define I915_SDVO "i915_sdvo"
struct intel_sdvo_priv {
- struct intel_i2c_chan *i2c_bus;
- int slaveaddr;
+ struct i2c_adapter *i2c_bus;
+ u8 slave_addr;
/* Register for the SDVO device: SDVOB or SDVOC */
int output_device;
@@ -146,13 +146,13 @@
struct i2c_msg msgs[] = {
{
- .addr = sdvo_priv->i2c_bus->slave_addr,
+ .addr = sdvo_priv->slave_addr >> 1,
.flags = 0,
.len = 1,
.buf = out_buf,
},
{
- .addr = sdvo_priv->i2c_bus->slave_addr,
+ .addr = sdvo_priv->slave_addr >> 1,
.flags = I2C_M_RD,
.len = 1,
.buf = buf,
@@ -162,7 +162,7 @@
out_buf[0] = addr;
out_buf[1] = 0;
- if ((ret = i2c_transfer(&sdvo_priv->i2c_bus->adapter, msgs, 2)) == 2)
+ if ((ret = i2c_transfer(sdvo_priv->i2c_bus, msgs, 2)) == 2)
{
*ch = buf[0];
return true;
@@ -175,10 +175,11 @@
static bool intel_sdvo_write_byte(struct intel_output *intel_output, int addr,
u8 ch)
{
+ struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
u8 out_buf[2];
struct i2c_msg msgs[] = {
{
- .addr = intel_output->i2c_bus->slave_addr,
+ .addr = sdvo_priv->slave_addr >> 1,
.flags = 0,
.len = 2,
.buf = out_buf,
@@ -188,7 +189,7 @@
out_buf[0] = addr;
out_buf[1] = ch;
- if (i2c_transfer(&intel_output->i2c_bus->adapter, msgs, 1) == 1)
+ if (i2c_transfer(intel_output->i2c_bus, msgs, 1) == 1)
{
return true;
}
@@ -1371,7 +1372,7 @@
intel_sdvo_set_control_bus_switch(intel_output, sdvo_priv->ddc_bus);
edid = drm_get_edid(&intel_output->base,
- &intel_output->ddc_bus->adapter);
+ intel_output->ddc_bus);
if (edid != NULL) {
sdvo_priv->is_hdmi = drm_detect_hdmi_monitor(edid);
kfree(edid);
@@ -1709,7 +1710,7 @@
list_for_each_entry(connector,
&dev->mode_config.connector_list, head) {
- if (to_intel_output(connector)->ddc_bus == chan) {
+ if (to_intel_output(connector)->ddc_bus == &chan->adapter) {
intel_output = to_intel_output(connector);
break;
}
@@ -1723,7 +1724,7 @@
struct intel_output *intel_output;
struct intel_sdvo_priv *sdvo_priv;
struct i2c_algo_bit_data *algo_data;
- struct i2c_algorithm *algo;
+ const struct i2c_algorithm *algo;
algo_data = (struct i2c_algo_bit_data *)i2c_adap->algo_data;
intel_output =
@@ -1733,7 +1734,7 @@
return -EINVAL;
sdvo_priv = intel_output->dev_priv;
- algo = (struct i2c_algorithm *)intel_output->i2c_bus->adapter.algo;
+ algo = intel_output->i2c_bus->algo;
intel_sdvo_set_control_bus_switch(intel_output, sdvo_priv->ddc_bus);
return algo->master_xfer(i2c_adap, msgs, num);
@@ -1785,12 +1786,13 @@
struct drm_connector *connector;
struct intel_output *intel_output;
struct intel_sdvo_priv *sdvo_priv;
- struct intel_i2c_chan *i2cbus = NULL;
- struct intel_i2c_chan *ddcbus = NULL;
+ struct i2c_adapter *i2cbus = NULL;
+ struct i2c_adapter *ddcbus = NULL;
+
int connector_type;
u8 ch[0x40];
int i;
- int encoder_type, output_id;
+ int encoder_type;
u8 slave_addr;
intel_output = kcalloc(sizeof(struct intel_output)+sizeof(struct intel_sdvo_priv), 1, GFP_KERNEL);
@@ -1802,25 +1804,23 @@
intel_output->type = INTEL_OUTPUT_SDVO;
/* setup the DDC bus. */
- if (output_device == SDVOB)
+ if (output_device == SDVOB) {
i2cbus = intel_i2c_create(dev, GPIOE, "SDVOCTRL_E for SDVOB");
- else
+ slave_addr = 0x38;
+ } else {
i2cbus = intel_i2c_create(dev, GPIOE, "SDVOCTRL_E for SDVOC");
-
+ slave_addr = 0x39;
+ }
+
if (!i2cbus)
goto err_inteloutput;
slave_addr = intel_sdvo_get_slave_addr(dev, output_device);
sdvo_priv->i2c_bus = i2cbus;
+ sdvo_priv->slave_addr = slave_addr;
- if (output_device == SDVOB) {
- output_id = 1;
- } else {
- output_id = 2;
- }
- sdvo_priv->i2c_bus->slave_addr = slave_addr >> 1;
sdvo_priv->output_device = output_device;
- intel_output->i2c_bus = i2cbus;
+ intel_output->i2c_bus = sdvo_priv->i2c_bus;
intel_output->dev_priv = sdvo_priv;
/* Read the regs to test if we can talk to the device */
@@ -1843,8 +1843,8 @@
goto err_i2c;
intel_sdvo_i2c_bit_algo.functionality =
- intel_output->i2c_bus->adapter.algo->functionality;
- ddcbus->adapter.algo = &intel_sdvo_i2c_bit_algo;
+ intel_output->i2c_bus->algo->functionality;
+ ddcbus->algo = &intel_sdvo_i2c_bit_algo;
intel_output->ddc_bus = ddcbus;
/* In defaut case sdvo lvds is false */