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drm/i915/sdvo: Always fallback to querying the shared DDC line 

On a few devices, like the Mac Mini, the CRT DDC pins are shared between
the analog connector and the digital connector. In this scenario, rely
on the EDID to determine if a digital panel is connected to the digital
connector.

Reported-and-tested-by: Tino Keitel <tino.keitel@tikei.de>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-11-23 22:37:01 +00:00
parent bcf50e2775
commit 0c1dab89ee
1 changed files with 6 additions and 45 deletions
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47
drivers/gpu/drm/i915/intel_sdvo.c
View File

@ -1296,55 +1296,14 @@ intel_sdvo_get_edid(struct drm_connector *connector)
return drm_get_edid(connector, &sdvo->ddc);
}
static struct drm_connector *
intel_find_analog_connector(struct drm_device *dev)
{
struct drm_connector *connector;
struct intel_sdvo *encoder;
list_for_each_entry(encoder,
&dev->mode_config.encoder_list,
base.base.head) {
if (encoder->base.type == INTEL_OUTPUT_ANALOG) {
list_for_each_entry(connector,
&dev->mode_config.connector_list,
head) {
if (&encoder->base ==
intel_attached_encoder(connector))
return connector;
}
}
}
return NULL;
}
static int
intel_analog_is_connected(struct drm_device *dev)
{
struct drm_connector *analog_connector;
analog_connector = intel_find_analog_connector(dev);
if (!analog_connector)
return false;
if (analog_connector->funcs->detect(analog_connector, false) ==
connector_status_disconnected)
return false;
return true;
}
/* Mac mini hack -- use the same DDC as the analog connector */
static struct edid *
intel_sdvo_get_analog_edid(struct drm_connector *connector)
{
struct drm_i915_private *dev_priv = connector->dev->dev_private;
if (!intel_analog_is_connected(connector->dev))
return NULL;
return drm_get_edid(connector, &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter);
return drm_get_edid(connector,
&dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter);
}
enum drm_connector_status
@ -1475,8 +1434,10 @@ static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
edid = intel_sdvo_get_analog_edid(connector);
if (edid != NULL) {
if (edid->input & DRM_EDID_INPUT_DIGITAL) {
drm_mode_connector_update_edid_property(connector, edid);
drm_add_edid_modes(connector, edid);
}
connector->display_info.raw_edid = NULL;
kfree(edid);
}