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drm/radeon/kms: handle !force case in connector detect more gracefully

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When force == false, we don't do load detection in the connector
detect functions.  Unforunately, we also return the previous
connector state so we never get disconnect events for DVI-I, DVI-A,
or VGA.  Save whether we detected the monitor via load detection
previously and use that to determine whether we return the previous
state or not.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=41561

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2011-10-07 14:23:48 -04:00 committed by Dave Airlie
parent 5f0a26128d
commit d0d0a225e6
2 changed files with 21 additions and 3 deletions
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23
drivers/gpu/drm/radeon/radeon_connectors.c
View file

@ -724,6 +724,7 @@ radeon_vga_detect(struct drm_connector *connector, bool force)
dret = radeon_ddc_probe(radeon_connector,
radeon_connector->requires_extended_probe);
if (dret) {
radeon_connector->detected_by_load = false;
if (radeon_connector->edid) {
kfree(radeon_connector->edid);
radeon_connector->edid = NULL;
@ -750,12 +751,21 @@ radeon_vga_detect(struct drm_connector *connector, bool force)
} else {
/* if we aren't forcing don't do destructive polling */
if (!force)
return connector->status;
if (!force) {
/* only return the previous status if we last
* detected a monitor via load.
*/
if (radeon_connector->detected_by_load)
return connector->status;
else
return ret;
}
if (radeon_connector->dac_load_detect && encoder) {
encoder_funcs = encoder->helper_private;
ret = encoder_funcs->detect(encoder, connector);
if (ret == connector_status_connected)
radeon_connector->detected_by_load = true;
}
}
@ -897,6 +907,7 @@ radeon_dvi_detect(struct drm_connector *connector, bool force)
dret = radeon_ddc_probe(radeon_connector,
radeon_connector->requires_extended_probe);
if (dret) {
radeon_connector->detected_by_load = false;
if (radeon_connector->edid) {
kfree(radeon_connector->edid);
radeon_connector->edid = NULL;
@ -964,8 +975,13 @@ radeon_dvi_detect(struct drm_connector *connector, bool force)
(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA))
goto out;
/* if we aren't forcing don't do destructive polling */
if (!force) {
ret = connector->status;
/* only return the previous status if we last
* detected a monitor via load.
*/
if (radeon_connector->detected_by_load)
ret = connector->status;
goto out;
}
@ -989,6 +1005,7 @@ radeon_dvi_detect(struct drm_connector *connector, bool force)
ret = encoder_funcs->detect(encoder, connector);
if (ret == connector_status_connected) {
radeon_connector->use_digital = false;
radeon_connector->detected_by_load = true;
}
}
break;

1
drivers/gpu/drm/radeon/radeon_mode.h
View file

@ -447,6 +447,7 @@ struct radeon_connector {
struct edid *edid;
void *con_priv;
bool dac_load_detect;
bool detected_by_load; /* if the connection status was determined by load */
uint16_t connector_object_id;
struct radeon_hpd hpd;
struct radeon_router router;