drivers/media/test-drivers/vidtv/vidtv_bridge.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * The Virtual DTV test driver serves as a reference DVB driver and helps
   4  * validate the existing APIs in the media subsystem. It can also aid
   5  * developers working on userspace applications.
   6  *
   7  * When this module is loaded, it will attempt to modprobe 'dvb_vidtv_tuner' and 'dvb_vidtv_demod'.
   8  *
   9  * Copyright (C) 2020 Daniel W. S. Almeida
  10  */
  11
  12 #ifndef VIDTV_BRIDGE_H
  13 #define VIDTV_BRIDGE_H
  14
  15 /*
  16  * For now, only one frontend is supported. See vidtv_start_streaming()
  17  */
  18 #define NUM_FE 1
  19
  20 #include <linux/i2c.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/types.h>
  23
  24 #include <media/dmxdev.h>
  25 #include <media/dvb_demux.h>
  26 #include <media/dvb_frontend.h>
  27
  28 #include "vidtv_mux.h"
  29
  30 /**
  31  * struct vidtv_dvb - Vidtv bridge state
  32  * @pdev: The platform device. Obtained when the bridge is probed.
  33  * @fe: The frontends. Obtained when probing the demodulator modules.
  34  * @adapter: Represents a DTV adapter. See 'dvb_register_adapter'.
  35  * @demux: The demux used by the dvb_dmx_swfilter_packets() call.
  36  * @dmx_dev: Represents a demux device.
  37  * @dmx_fe: The frontends associated with the demux.
  38  * @i2c_adapter: The i2c_adapter associated with the bridge driver.
  39  * @i2c_client_demod: The i2c_clients associated with the demodulator modules.
  40  * @i2c_client_tuner: The i2c_clients associated with the tuner modules.
  41  * @nfeeds: The number of feeds active.
  42  * @feed_lock: Protects access to the start/stop stream logic/data.
  43  * @streaming: Whether we are streaming now.
  44  * @mux: The abstraction responsible for delivering MPEG TS packets to the bridge.
  45  */
  46 struct vidtv_dvb {
  47         struct platform_device *pdev;
  48         struct dvb_frontend *fe[NUM_FE];
  49         struct dvb_adapter adapter;
  50         struct dvb_demux demux;
  51         struct dmxdev dmx_dev;
  52         struct dmx_frontend dmx_fe[NUM_FE];
  53         struct i2c_adapter i2c_adapter;
  54         struct i2c_client *i2c_client_demod[NUM_FE];
  55         struct i2c_client *i2c_client_tuner[NUM_FE];
  56
  57         u32 nfeeds;
  58         struct mutex feed_lock; /* Protects access to the start/stop stream logic/data. */
  59
  60         bool streaming;
  61
  62         struct vidtv_mux *mux;
  63 };
  64
  65 #endif // VIDTV_BRIDG_H