This can help drivers to make somewhat intelligent decisions in their ->detect callback: If the connector is hpd capable and in the unknown state, the driver needs to force a full detect cycle. Otherwise it could just (if it chooses so) to update the connector state from it's hpd handler directly, and always return that in the ->detect callback.
Atm only drm/i915 calls drm_mode_config_reset at resume time, so other drivers would need to add that call first before using this facility.
Signed-Off-by: Daniel Vetter daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_crtc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index ef1b221..05c4e7b 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -555,6 +555,7 @@ int drm_connector_init(struct drm_device *dev, INIT_LIST_HEAD(&connector->probed_modes); INIT_LIST_HEAD(&connector->modes); connector->edid_blob_ptr = NULL; + connector->status = connector_status_unknown;
list_add_tail(&connector->head, &dev->mode_config.connector_list); dev->mode_config.num_connector++; @@ -3656,9 +3657,12 @@ void drm_mode_config_reset(struct drm_device *dev) if (encoder->funcs->reset) encoder->funcs->reset(encoder);
- list_for_each_entry(connector, &dev->mode_config.connector_list, head) + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + connector->status = connector_status_unknown; + if (connector->funcs->reset) connector->funcs->reset(connector); + } } EXPORT_SYMBOL(drm_mode_config_reset);