root/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Broadcom BM2835 V4L2 driver
   4  *
   5  * Copyright © 2013 Raspberry Pi (Trading) Ltd.
   6  *
   7  * Authors: Vincent Sanders @ Collabora
   8  *          Dave Stevenson @ Broadcom
   9  *              (now dave.stevenson@raspberrypi.org)
  10  *          Simon Mellor @ Broadcom
  11  *          Luke Diamand @ Broadcom
  12  *
  13  * MMAL interface to VCHIQ message passing
  14  */
  15 
  16 #ifndef MMAL_VCHIQ_H
  17 #define MMAL_VCHIQ_H
  18 
  19 #include "mmal-msg-format.h"
  20 
  21 #define MAX_PORT_COUNT 4
  22 
  23 /* Maximum size of the format extradata. */
  24 #define MMAL_FORMAT_EXTRADATA_MAX_SIZE 128
  25 
  26 struct vchiq_mmal_instance;
  27 
  28 enum vchiq_mmal_es_type {
  29         MMAL_ES_TYPE_UNKNOWN,     /**< Unknown elementary stream type */
  30         MMAL_ES_TYPE_CONTROL,     /**< Elementary stream of control commands */
  31         MMAL_ES_TYPE_AUDIO,       /**< Audio elementary stream */
  32         MMAL_ES_TYPE_VIDEO,       /**< Video elementary stream */
  33         MMAL_ES_TYPE_SUBPICTURE   /**< Sub-picture elementary stream */
  34 };
  35 
  36 struct vchiq_mmal_port_buffer {
  37         unsigned int num; /* number of buffers */
  38         u32 size; /* size of buffers */
  39         u32 alignment; /* alignment of buffers */
  40 };
  41 
  42 struct vchiq_mmal_port;
  43 
  44 typedef void (*vchiq_mmal_buffer_cb)(
  45                 struct vchiq_mmal_instance  *instance,
  46                 struct vchiq_mmal_port *port,
  47                 int status, struct mmal_buffer *buffer,
  48                 unsigned long length, u32 mmal_flags, s64 dts, s64 pts);
  49 
  50 struct vchiq_mmal_port {
  51         u32 enabled:1;
  52         u32 handle;
  53         u32 type; /* port type, cached to use on port info set */
  54         u32 index; /* port index, cached to use on port info set */
  55 
  56         /* component port belongs to, allows simple deref */
  57         struct vchiq_mmal_component *component;
  58 
  59         struct vchiq_mmal_port *connected; /* port connected to */
  60 
  61         /* buffer info */
  62         struct vchiq_mmal_port_buffer minimum_buffer;
  63         struct vchiq_mmal_port_buffer recommended_buffer;
  64         struct vchiq_mmal_port_buffer current_buffer;
  65 
  66         /* stream format */
  67         struct mmal_es_format_local format;
  68         /* elementary stream format */
  69         union mmal_es_specific_format es;
  70 
  71         /* data buffers to fill */
  72         struct list_head buffers;
  73         /* lock to serialise adding and removing buffers from list */
  74         spinlock_t slock;
  75 
  76         /* Count of buffers the VPU has yet to return */
  77         atomic_t buffers_with_vpu;
  78         /* callback on buffer completion */
  79         vchiq_mmal_buffer_cb buffer_cb;
  80         /* callback context */
  81         void *cb_ctx;
  82 };
  83 
  84 struct vchiq_mmal_component {
  85         u32 enabled:1;
  86         u32 handle;  /* VideoCore handle for component */
  87         u32 inputs;  /* Number of input ports */
  88         u32 outputs; /* Number of output ports */
  89         u32 clocks;  /* Number of clock ports */
  90         struct vchiq_mmal_port control; /* control port */
  91         struct vchiq_mmal_port input[MAX_PORT_COUNT]; /* input ports */
  92         struct vchiq_mmal_port output[MAX_PORT_COUNT]; /* output ports */
  93         struct vchiq_mmal_port clock[MAX_PORT_COUNT]; /* clock ports */
  94 };
  95 
  96 int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance);
  97 int vchiq_mmal_finalise(struct vchiq_mmal_instance *instance);
  98 
  99 /* Initialise a mmal component and its ports
 100  *
 101  */
 102 int vchiq_mmal_component_init(
 103                 struct vchiq_mmal_instance *instance,
 104                 const char *name,
 105                 struct vchiq_mmal_component **component_out);
 106 
 107 int vchiq_mmal_component_finalise(
 108                 struct vchiq_mmal_instance *instance,
 109                 struct vchiq_mmal_component *component);
 110 
 111 int vchiq_mmal_component_enable(
 112                 struct vchiq_mmal_instance *instance,
 113                 struct vchiq_mmal_component *component);
 114 
 115 int vchiq_mmal_component_disable(
 116                 struct vchiq_mmal_instance *instance,
 117                 struct vchiq_mmal_component *component);
 118 
 119 /* enable a mmal port
 120  *
 121  * enables a port and if a buffer callback provided enque buffer
 122  * headers as appropriate for the port.
 123  */
 124 int vchiq_mmal_port_enable(
 125                 struct vchiq_mmal_instance *instance,
 126                 struct vchiq_mmal_port *port,
 127                 vchiq_mmal_buffer_cb buffer_cb);
 128 
 129 /* disable a port
 130  *
 131  * disable a port will dequeue any pending buffers
 132  */
 133 int vchiq_mmal_port_disable(struct vchiq_mmal_instance *instance,
 134                             struct vchiq_mmal_port *port);
 135 
 136 int vchiq_mmal_port_parameter_set(struct vchiq_mmal_instance *instance,
 137                                   struct vchiq_mmal_port *port,
 138                                   u32 parameter,
 139                                   void *value,
 140                                   u32 value_size);
 141 
 142 int vchiq_mmal_port_parameter_get(struct vchiq_mmal_instance *instance,
 143                                   struct vchiq_mmal_port *port,
 144                                   u32 parameter,
 145                                   void *value,
 146                                   u32 *value_size);
 147 
 148 int vchiq_mmal_port_set_format(struct vchiq_mmal_instance *instance,
 149                                struct vchiq_mmal_port *port);
 150 
 151 int vchiq_mmal_port_connect_tunnel(struct vchiq_mmal_instance *instance,
 152                                    struct vchiq_mmal_port *src,
 153                                    struct vchiq_mmal_port *dst);
 154 
 155 int vchiq_mmal_version(struct vchiq_mmal_instance *instance,
 156                        u32 *major_out,
 157                        u32 *minor_out);
 158 
 159 int vchiq_mmal_submit_buffer(struct vchiq_mmal_instance *instance,
 160                              struct vchiq_mmal_port *port,
 161                              struct mmal_buffer *buf);
 162 
 163 int mmal_vchi_buffer_init(struct vchiq_mmal_instance *instance,
 164                           struct mmal_buffer *buf);
 165 int mmal_vchi_buffer_cleanup(struct mmal_buffer *buf);
 166 #endif /* MMAL_VCHIQ_H */