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drm/i915: Initialize the SDVO device based on the sdvo info parsed from VBT 

http://bugs.freedesktop.org/show_bug.cgi?id=20429

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
[anholt: Massive cleanup of the slave addr function]
Signed-off-by: Eric Anholt <eric@anholt.net>
hifive-unleashed-5.1
yakui_zhao 2009-05-31 17:18:07 +08:00 committed by Eric Anholt
parent 9b9d172d06
commit 714605e4a0
1 changed files with 40 additions and 3 deletions
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43
drivers/gpu/drm/i915/intel_sdvo.c
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@ -1741,6 +1741,43 @@ static struct i2c_algorithm intel_sdvo_i2c_bit_algo = {
.master_xfer = intel_sdvo_master_xfer,
};
static u8
intel_sdvo_get_slave_addr(struct drm_device *dev, int output_device)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct sdvo_device_mapping *my_mapping, *other_mapping;
if (output_device == SDVOB) {
my_mapping = &dev_priv->sdvo_mappings[0];
other_mapping = &dev_priv->sdvo_mappings[1];
} else {
my_mapping = &dev_priv->sdvo_mappings[1];
other_mapping = &dev_priv->sdvo_mappings[0];
}
/* If the BIOS described our SDVO device, take advantage of it. */
if (my_mapping->slave_addr)
return my_mapping->slave_addr;
/* If the BIOS only described a different SDVO device, use the
* address that it isn't using.
*/
if (other_mapping->slave_addr) {
if (other_mapping->slave_addr == 0x70)
return 0x72;
else
return 0x70;
}
/* No SDVO device info is found for another DVO port,
* so use mapping assumption we had before BIOS parsing.
*/
if (output_device == SDVOB)
return 0x70;
else
return 0x72;
}
bool intel_sdvo_init(struct drm_device *dev, int output_device)
{
struct drm_connector *connector;
@ -1752,6 +1789,7 @@ bool intel_sdvo_init(struct drm_device *dev, int output_device)
u8 ch[0x40];
int i;
int encoder_type, output_id;
u8 slave_addr;
intel_output = kcalloc(sizeof(struct intel_output)+sizeof(struct intel_sdvo_priv), 1, GFP_KERNEL);
if (!intel_output) {
@ -1770,16 +1808,15 @@ bool intel_sdvo_init(struct drm_device *dev, int output_device)
if (!i2cbus)
goto err_inteloutput;
slave_addr = intel_sdvo_get_slave_addr(dev, output_device);
sdvo_priv->i2c_bus = i2cbus;
if (output_device == SDVOB) {
output_id = 1;
sdvo_priv->i2c_bus->slave_addr = 0x38;
} else {
output_id = 2;
sdvo_priv->i2c_bus->slave_addr = 0x39;
}
sdvo_priv->i2c_bus->slave_addr = slave_addr >> 1;
sdvo_priv->output_device = output_device;
intel_output->i2c_bus = i2cbus;
intel_output->dev_priv = sdvo_priv;