diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_sdvo.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_sdvo.c | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c index f3ef6bfd8ff..d8fb88d335c 100644 --- a/drivers/gpu/drm/i915/intel_sdvo.c +++ b/drivers/gpu/drm/i915/intel_sdvo.c @@ -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; |