drivers/media/cec/usb/extron-da-hd-4k-plus/cec-splitter.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 /*
   4  * Copyright 2021-2024 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
   5  */
   6
   7 #ifndef _CEC_SPLITTER_H_
   8 #define _CEC_SPLITTER_H_
   9
  10 struct cec_splitter;
  11
  12 #define STATE_CHANGE_MAX_REPEATS 2
  13
  14 struct cec_splitter_port {
  15         struct cec_splitter *splitter;
  16         struct cec_adapter *adap;
  17         unsigned int port;
  18         bool is_active_source;
  19         bool found_sink;
  20         ktime_t lost_sink_ts;
  21         u32 out_request_current_latency_seq;
  22         ktime_t out_request_current_latency_ts;
  23         u8 video_latency;
  24         u32 out_give_device_power_status_seq;
  25         ktime_t out_give_device_power_status_ts;
  26         u8 power_status;
  27 };
  28
  29 struct cec_splitter {
  30         struct device *dev;
  31         unsigned int num_out_ports;
  32         struct cec_splitter_port **ports;
  33
  34         /* High-level splitter state */
  35         u8 request_current_latency_dest;
  36         u8 give_device_power_status_dest;
  37         bool is_standby;
  38 };
  39
  40 void cec_splitter_unconfigured_output(struct cec_splitter_port *port);
  41 void cec_splitter_configured_output(struct cec_splitter_port *port);
  42 int cec_splitter_received_input(struct cec_splitter_port *port, struct cec_msg *msg);
  43 int cec_splitter_received_output(struct cec_splitter_port *port, struct cec_msg *msg,
  44                                  struct cec_adapter *input_adap);
  45 void cec_splitter_nb_transmit_canceled_output(struct cec_splitter_port *port,
  46                                               const struct cec_msg *msg,
  47                                               struct cec_adapter *input_adap);
  48 bool cec_splitter_poll(struct cec_splitter *splitter,
  49                        struct cec_adapter *input_adap, bool debug);
  50
  51 #endif