Commit 567f882a authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

media: cec.h: add cec_msg_recv_is_rx/tx_result helpers 



These two helper functions return true if the received message
contains the result of a previous non-blocking transmit. Either
the tx_status result (cec_msg_recv_is_tx_result) of the transmit,
or the rx_status result (cec_msg_recv_is_rx_result) of the reply
to the original transmit.

Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent f9d0ecbf

include/uapi/linux/cec.h

+20 −0
Original line number Diff line number Diff line
@@ -142,6 +142,26 @@ static inline void cec_msg_set_reply_to(struct cec_msg *msg, 
	msg->reply = msg->timeout = 0;

}



/**

 * cec_msg_recv_is_tx_result - return true if this message contains the

 *			       result of an earlier non-blocking transmit

 * @msg:	the message structure from CEC_RECEIVE

 */

static inline int cec_msg_recv_is_tx_result(const struct cec_msg *msg)

{

	return msg->sequence && msg->tx_status && !msg->rx_status;

}



/**

 * cec_msg_recv_is_rx_result - return true if this message contains the

 *			       reply of an earlier non-blocking transmit

 * @msg:	the message structure from CEC_RECEIVE

 */

static inline int cec_msg_recv_is_rx_result(const struct cec_msg *msg)

{

	return msg->sequence && !msg->tx_status && msg->rx_status;

}



/* cec_msg flags field */

#define CEC_MSG_FL_REPLY_TO_FOLLOWERS	(1 << 0)

#define CEC_MSG_FL_RAW			(1 << 1)