/*
* The EDID disappeared (likely because of the HPD going down).
*/
void drm_dp_cec_unset_edid(struct drm_dp_aux *aux)
{
/* No transfer function was set, so not a DP connector */
if (!aux->transfer)
return;
cancel_delayed_work_sync(&aux->cec.unregister_work);
mutex_lock(&aux->cec.lock);
if (!aux->cec.adap)
goto unlock;
cec_phys_addr_invalidate(aux->cec.adap);
/*
* We're done if we want to keep the CEC device
* (drm_dp_cec_unregister_delay is >= NEVER_UNREG_DELAY) or if the
* DPCD still indicates the CEC capability (expected for an integrated
* HDMI branch device).
*/
if (drm_dp_cec_unregister_delay < NEVER_UNREG_DELAY &&
!drm_dp_cec_cap(aux, NULL)) {
/*
* Unregister the CEC adapter after drm_dp_cec_unregister_delay
* seconds. This to debounce short HPD off-and-on cycles from
* displays.
*/
schedule_delayed_work(&aux->cec.unregister_work,
drm_dp_cec_unregister_delay * HZ);
}
unlock:
mutex_unlock(&aux->cec.lock);
}
static enum drm_connector_status
sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)
{
struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
unsigned long reg;
if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_HPD_REG, reg,
reg & SUN4I_HDMI_HPD_HIGH,
0, 500000)) {
cec_phys_addr_invalidate(hdmi->cec_adap);
return connector_status_disconnected;
}
return connector_status_connected;
}
