diff options
Diffstat (limited to 'drivers/media/cec')
| -rw-r--r-- | drivers/media/cec/cec-adap.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c index 9a1ec9299aca..5827d8c3742a 100644 --- a/drivers/media/cec/cec-adap.c +++ b/drivers/media/cec/cec-adap.c @@ -809,14 +809,23 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg, __func__); return -EINVAL; } - if (msg->len > 1 && adap->is_configured && + if (adap->is_configured && !cec_has_log_addr(adap, cec_msg_initiator(msg))) { dprintk(1, "%s: initiator has unknown logical address %d\n", __func__, cec_msg_initiator(msg)); return -EINVAL; } + /* + * Special case: allow Ping and IMAGE/TEXT_VIEW_ON to be + * transmitted to a TV, even if the adapter is unconfigured. + * This makes it possible to detect or wake up displays that + * pull down the HPD when in standby. + */ if (!adap->is_configured && !adap->is_configuring && - msg->msg[0] != 0xf0) { + (msg->len > 2 || + cec_msg_destination(msg) != CEC_LOG_ADDR_TV || + (msg->len == 2 && msg->msg[1] != CEC_MSG_IMAGE_VIEW_ON && + msg->msg[1] != CEC_MSG_TEXT_VIEW_ON))) { dprintk(1, "%s: adapter is unconfigured\n", __func__); return -ENONET; } |