Documentation/ABI/testing/configfs-most

   1 What:           /sys/kernel/config/most_<component>
   2 Date:           March 8, 2019
   3 KernelVersion:  5.2
   4 Description:    Interface is used to configure and connect device channels
   5                 to component drivers.
   6
   7                 Attributes are visible only when configfs is mounted. To mount
   8                 configfs in /sys/kernel/config directory use:
   9                 # mount -t configfs none /sys/kernel/config/
  10
  11
  12 What:           /sys/kernel/config/most_cdev/<link>
  13 Date:           March 8, 2019
  14 KernelVersion:  5.2
  15 Description:
  16                 The attributes:
  17
  18                 buffer_size
  19                                 configure the buffer size for this channel
  20
  21                 subbuffer_size
  22                                 configure the sub-buffer size for this channel
  23                                 (needed for synchronous and isochrnous data)
  24
  25
  26                 num_buffers
  27                                 configure number of buffers used for this
  28                                 channel
  29
  30                 datatype
  31                                 configure type of data that will travel over
  32                                 this channel
  33
  34                 direction
  35                                 configure whether this link will be an input
  36                                 or output
  37
  38                 dbr_size
  39                                 configure DBR data buffer size (this is used
  40                                 for MediaLB communication only)
  41
  42                 packets_per_xact
  43                                 configure the number of packets that will be
  44                                 collected from the network before being
  45                                 transmitted via USB (this is used for USB
  46                                 communication only)
  47
  48                 device
  49                                 name of the device the link is to be attached to
  50
  51                 channel
  52                                 name of the channel the link is to be attached to
  53
  54                 comp_params
  55                                 pass parameters needed by some components
  56
  57                 create_link
  58                                 write '1' to this attribute to trigger the
  59                                 creation of the link. In case of speculative
  60                                 configuration, the creation is post-poned until
  61                                 a physical device is being attached to the bus.
  62
  63                 destroy_link
  64                                 write '1' to this attribute to destroy an
  65                                 active link
  66
  67 What:           /sys/kernel/config/most_video/<link>
  68 Date:           March 8, 2019
  69 KernelVersion:  5.2
  70 Description:
  71                 The attributes:
  72
  73                 buffer_size
  74                                 configure the buffer size for this channel
  75
  76                 subbuffer_size
  77                                 configure the sub-buffer size for this channel
  78                                 (needed for synchronous and isochrnous data)
  79
  80
  81                 num_buffers
  82                                 configure number of buffers used for this
  83                                 channel
  84
  85                 datatype
  86                                 configure type of data that will travel over
  87                                 this channel
  88
  89                 direction
  90                                 configure whether this link will be an input
  91                                 or output
  92
  93                 dbr_size
  94                                 configure DBR data buffer size (this is used
  95                                 for MediaLB communication only)
  96
  97                 packets_per_xact
  98                                 configure the number of packets that will be
  99                                 collected from the network before being
 100                                 transmitted via USB (this is used for USB
 101                                 communication only)
 102
 103                 device
 104                                 name of the device the link is to be attached to
 105
 106                 channel
 107                                 name of the channel the link is to be attached to
 108
 109                 comp_params
 110                                 pass parameters needed by some components
 111
 112                 create_link
 113                                 write '1' to this attribute to trigger the
 114                                 creation of the link. In case of speculative
 115                                 configuration, the creation is post-poned until
 116                                 a physical device is being attached to the bus.
 117
 118                 destroy_link
 119                                 write '1' to this attribute to destroy an
 120                                 active link
 121
 122 What:           /sys/kernel/config/most_net/<link>
 123 Date:           March 8, 2019
 124 KernelVersion:  5.2
 125 Description:
 126                 The attributes:
 127
 128                 buffer_size
 129                                 configure the buffer size for this channel
 130
 131                 subbuffer_size
 132                                 configure the sub-buffer size for this channel
 133                                 (needed for synchronous and isochrnous data)
 134
 135
 136                 num_buffers
 137                                 configure number of buffers used for this
 138                                 channel
 139
 140                 datatype
 141                                 configure type of data that will travel over
 142                                 this channel
 143
 144                 direction
 145                                 configure whether this link will be an input
 146                                 or output
 147
 148                 dbr_size
 149                                 configure DBR data buffer size (this is used
 150                                 for MediaLB communication only)
 151
 152                 packets_per_xact
 153                                 configure the number of packets that will be
 154                                 collected from the network before being
 155                                 transmitted via USB (this is used for USB
 156                                 communication only)
 157
 158                 device
 159                                 name of the device the link is to be attached to
 160
 161                 channel
 162                                 name of the channel the link is to be attached to
 163
 164                 comp_params
 165                                 pass parameters needed by some components
 166
 167                 create_link
 168                                 write '1' to this attribute to trigger the
 169                                 creation of the link. In case of speculative
 170                                 configuration, the creation is post-poned until
 171                                 a physical device is being attached to the bus.
 172
 173                 destroy_link
 174                                 write '1' to this attribute to destroy an
 175                                 active link
 176
 177 What:           /sys/kernel/config/most_sound/<card>
 178 Date:           March 8, 2019
 179 KernelVersion:  5.2
 180 Description:
 181                 The attributes:
 182
 183                 create_card
 184                                 write '1' to this attribute to trigger the
 185                                 registration of the sound card with the ALSA
 186                                 subsystem.
 187
 188 What:           /sys/kernel/config/most_sound/<card>/<link>
 189 Date:           March 8, 2019
 190 KernelVersion:  5.2
 191 Description:
 192                 The attributes:
 193
 194                 buffer_size
 195                                 configure the buffer size for this channel
 196
 197                 subbuffer_size
 198                                 configure the sub-buffer size for this channel
 199                                 (needed for synchronous and isochrnous data)
 200
 201
 202                 num_buffers
 203                                 configure number of buffers used for this
 204                                 channel
 205
 206                 datatype
 207                                 configure type of data that will travel over
 208                                 this channel
 209
 210                 direction
 211                                 configure whether this link will be an input
 212                                 or output
 213
 214                 dbr_size
 215                                 configure DBR data buffer size (this is used
 216                                 for MediaLB communication only)
 217
 218                 packets_per_xact
 219                                 configure the number of packets that will be
 220                                 collected from the network before being
 221                                 transmitted via USB (this is used for USB
 222                                 communication only)
 223
 224                 device
 225                                 name of the device the link is to be attached to
 226
 227                 channel
 228                                 name of the channel the link is to be attached to
 229
 230                 comp_params
 231                                 pass parameters needed by some components
 232
 233                 create_link
 234                                 write '1' to this attribute to trigger the
 235                                 creation of the link. In case of speculative
 236                                 configuration, the creation is post-poned until
 237                                 a physical device is being attached to the bus.
 238
 239                 destroy_link
 240                                 write '1' to this attribute to destroy an
 241                                 active link