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drm/radeon/kms: deal with connectors sourced to the same encoder 

Some systems have multiple connectors connected to the same encoder;
e.g., DVI and HDMI connected to the same encoder with the same ddc
line. Since we expose connectors as xrandr outputs, randr treats them
separately which results in it trying to source the same encoder to
different crtcs. If we have an HDMI and DVI-D port on the same encoder,
pick the one to be considered connected based on the edid (HDMI if edid
indicates HDMI, DVI otherwise).

Should fix fdo bug 25150

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2009-11-17 15:44:01 -05:00 committed by Dave Airlie
parent 3e5f8ff3a9
commit 71407c46fe
1 changed files with 33 additions and 0 deletions
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33
drivers/gpu/drm/radeon/radeon_connectors.c
View File

@ -735,6 +735,39 @@ static enum drm_connector_status radeon_dvi_detect(struct drm_connector *connect
ret = connector_status_disconnected;
} else
ret = connector_status_connected;
/* multiple connectors on the same encoder with the same ddc line
* This tends to be HDMI and DVI on the same encoder with the
* same ddc line. If the edid says HDMI, consider the HDMI port
* connected and the DVI port disconnected. If the edid doesn't
* say HDMI, vice versa.
*/
if (radeon_connector->shared_ddc && connector_status_connected) {
struct drm_device *dev = connector->dev;
struct drm_connector *list_connector;
struct radeon_connector *list_radeon_connector;
list_for_each_entry(list_connector, &dev->mode_config.connector_list, head) {
if (connector == list_connector)
continue;
list_radeon_connector = to_radeon_connector(list_connector);
if (radeon_connector->devices == list_radeon_connector->devices) {
if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
if (connector->connector_type == DRM_MODE_CONNECTOR_DVID) {
kfree(radeon_connector->edid);
radeon_connector->edid = NULL;
ret = connector_status_disconnected;
}
} else {
if ((connector->connector_type == DRM_MODE_CONNECTOR_HDMIA) ||
(connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)) {
kfree(radeon_connector->edid);
radeon_connector->edid = NULL;
ret = connector_status_disconnected;
}
}
}
}
}
}
}