Media subsystem kernel internal API

This section contains usage information about media subsystem and its supported drivers.

Please see:

Media subsystem admin and user guide

• for usage information about media subsystem and supported drivers;

Linux Media Infrastructure userspace API

• for the userspace APIs used on media devices.

Table of Contents

• 1. Media Subsystem Profile
  • 1.1. Overview
    • 1.1.1. Media maintainers
  • 1.2. Submit Checklist Addendum
    • 1.2.1. Style Cleanup Patches
    • 1.2.2. Coding Style Addendum
  • 1.3. Key Cycle Dates
  • 1.4. Review Cadence
• 2. Video4Linux devices
  • 2.1. Introduction
  • 2.2. Structure of a V4L driver
  • 2.3. Structure of the V4L2 framework
  • 2.4. Video device’ s internal representation
    • 2.4.1. ioctls and locking
    • 2.4.2. Video device registration
    • 2.4.3. video device debugging
    • 2.4.4. Video device cleanup
    • 2.4.5. helper functions
    • 2.4.6. video_device functions and data structures
      • vfl_devnode_type
      • vfl_devnode_direction
      • v4l2_video_device_flags
      • v4l2_prio_state
      • v4l2_prio_init()
      • v4l2_prio_change()
      • v4l2_prio_open()
      • v4l2_prio_close()
      • v4l2_prio_max()
      • v4l2_prio_check()
      • v4l2_file_operations
      • video_device
      • media_entity_to_video_device
      • to_video_device
      • __video_register_device()
      • video_register_device()
      • video_register_device_no_warn()
      • video_unregister_device()
      • video_device_alloc()
      • video_device_release()
      • video_device_release_empty()
      • v4l2_disable_ioctl()
      • video_get_drvdata()
      • video_set_drvdata()
      • video_devdata()
      • video_drvdata()
      • video_device_node_name()
      • video_is_registered()
      • v4l2_debugfs_root()
      • video_device_pipeline_start()
      • __video_device_pipeline_start()
      • video_device_pipeline_stop()
      • __video_device_pipeline_stop()
      • video_device_pipeline_alloc_start()
      • video_device_pipeline()
  • 2.5. V4L2 device instance
    • 2.5.1. v4l2_device functions and data structures
      • v4l2_device
      • v4l2_device_get()
      • v4l2_device_put()
      • v4l2_device_register()
      • v4l2_device_set_name()
      • v4l2_device_disconnect()
      • v4l2_device_unregister()
      • v4l2_device_register_subdev
      • v4l2_device_unregister_subdev()
      • __v4l2_device_register_subdev_nodes()
      • v4l2_device_register_subdev_nodes()
      • v4l2_device_register_ro_subdev_nodes()
      • v4l2_subdev_notify()
      • v4l2_device_supports_requests()
      • v4l2_device_for_each_subdev
      • __v4l2_device_call_subdevs_p
      • __v4l2_device_call_subdevs
      • __v4l2_device_call_subdevs_until_err_p
      • __v4l2_device_call_subdevs_until_err
      • v4l2_device_call_all
      • v4l2_device_call_until_err
      • v4l2_device_mask_call_all
      • v4l2_device_mask_call_until_err
      • v4l2_device_has_op
      • v4l2_device_mask_has_op
  • 2.6. V4L2 File handles
    • 2.6.1. V4L2 fh functions and data structures
      • v4l2_fh
      • file_to_v4l2_fh()
      • v4l2_fh_init()
      • v4l2_fh_add()
      • v4l2_fh_open()
      • v4l2_fh_del()
      • v4l2_fh_exit()
      • v4l2_fh_release()
      • v4l2_fh_is_singular()
      • v4l2_fh_is_singular_file()
  • 2.7. V4L2 sub-devices
    • 2.7.1. Subdev registration
      • 2.7.1.1. Registering synchronous sub-devices
      • 2.7.1.2. Registering asynchronous sub-devices
      • 2.7.1.3. Asynchronous sub-device notifiers
      • 2.7.1.4. Asynchronous sub-device notifier for sub-devices
      • 2.7.1.5. Asynchronous sub-device registration helper for camera sensor drivers
      • 2.7.1.6. Asynchronous sub-device notifier example
      • 2.7.1.7. Asynchronous sub-device notifier callbacks
    • 2.7.2. Calling subdev operations
  • 2.8. V4L2 sub-device userspace API
  • 2.9. Read-only sub-device userspace API
  • 2.10. I2C sub-device drivers
  • 2.11. Centrally managed subdev active state
  • 2.12. Streams, multiplexed media pads and internal routing
  • 2.13. V4L2 sub-device functions and data structures
    • v4l2_decode_vbi_line
    • v4l2_subdev_io_pin_bits
    • v4l2_subdev_io_pin_config
    • v4l2_subdev_core_ops
    • v4l2_subdev_tuner_ops
    • v4l2_subdev_audio_ops
    • v4l2_mbus_frame_desc_entry_csi2
    • v4l2_mbus_frame_desc_flags
    • v4l2_mbus_frame_desc_entry
    • v4l2_mbus_frame_desc_type
    • v4l2_mbus_frame_desc
    • v4l2_subdev_pre_streamon_flags
    • v4l2_subdev_video_ops
    • v4l2_subdev_vbi_ops
    • v4l2_subdev_sensor_ops
    • v4l2_subdev_ir_mode
    • v4l2_subdev_ir_parameters
    • v4l2_subdev_ir_ops
    • v4l2_subdev_pad_config
    • v4l2_subdev_stream_configs
    • v4l2_subdev_krouting
    • v4l2_subdev_state
    • v4l2_subdev_pad_ops
    • v4l2_subdev_ops
    • v4l2_subdev_internal_ops
    • v4l2_subdev_platform_data
    • v4l2_subdev
    • media_entity_to_v4l2_subdev
    • vdev_to_v4l2_subdev
    • v4l2_subdev_fh
    • to_v4l2_subdev_fh
    • v4l2_set_subdevdata()
    • v4l2_get_subdevdata()
    • v4l2_set_subdev_hostdata()
    • v4l2_get_subdev_hostdata()
    • v4l2_subdev_get_fwnode_pad_1_to_1()
    • v4l2_subdev_link_validate_default()
    • v4l2_subdev_link_validate()
    • v4l2_subdev_has_pad_interdep()
    • __v4l2_subdev_state_alloc()
    • __v4l2_subdev_state_free()
    • v4l2_subdev_init_finalize
    • v4l2_subdev_cleanup()
    • v4l2_subdev_state_get_format
    • v4l2_subdev_state_get_crop
    • v4l2_subdev_state_get_compose
    • v4l2_subdev_state_get_interval
    • v4l2_subdev_get_fmt()
    • v4l2_subdev_get_frame_interval()
    • v4l2_subdev_set_routing()
    • for_each_active_route
    • v4l2_subdev_set_routing_with_fmt()
    • v4l2_subdev_routing_find_opposite_end()
    • v4l2_subdev_state_get_opposite_stream_format()
    • v4l2_subdev_state_xlate_streams()
    • v4l2_subdev_routing_restriction
    • v4l2_subdev_routing_validate()
    • v4l2_subdev_enable_streams()
    • v4l2_subdev_disable_streams()
    • v4l2_subdev_s_stream_helper()
    • v4l2_subdev_lock_state()
    • v4l2_subdev_unlock_state()
    • v4l2_subdev_lock_states()
    • v4l2_subdev_unlock_states()
    • v4l2_subdev_get_unlocked_active_state()
    • v4l2_subdev_get_locked_active_state()
    • v4l2_subdev_lock_and_get_active_state()
    • v4l2_subdev_init()
    • v4l2_subdev_call
    • v4l2_subdev_call_state_active
    • v4l2_subdev_call_state_try
    • v4l2_subdev_has_op
    • v4l2_subdev_notify_event()
    • v4l2_subdev_is_streaming()
  • 2.14. V4L2 events
    • 2.14.1. Event subscription
    • 2.14.2. Unsubscribing an event
    • 2.14.3. Check if there’s a pending event
    • 2.14.4. How events work
      • 2.14.4.1. V4L2 event functions and data structures
        • v4l2_kevent
        • v4l2_subscribed_event_ops
        • v4l2_subscribed_event
        • v4l2_event_dequeue()
        • v4l2_event_queue()
        • v4l2_event_queue_fh()
        • v4l2_event_wake_all()
        • v4l2_event_pending()
        • v4l2_event_subscribe()
        • v4l2_event_unsubscribe()
        • v4l2_event_unsubscribe_all()
        • v4l2_event_subdev_unsubscribe()
        • v4l2_src_change_event_subscribe()
        • v4l2_src_change_event_subdev_subscribe()
  • 2.15. V4L2 Controls
    • 2.15.1. Introduction
    • 2.15.2. Objects in the framework
    • 2.15.3. Basic usage for V4L2 and sub-device drivers
    • 2.15.4. Inheriting Sub-device Controls
    • 2.15.5. Accessing Control Values
    • 2.15.6. Menu Controls
    • 2.15.7. Custom Controls
    • 2.15.8. Active and Grabbed Controls
    • 2.15.9. Control Clusters
    • 2.15.10. Handling autogain/gain-type Controls with Auto Clusters
    • 2.15.11. VIDIOC_LOG_STATUS Support
    • 2.15.12. Different Handlers for Different Video Nodes
    • 2.15.13. Finding Controls
    • 2.15.14. Preventing Controls inheritance
    • 2.15.15. V4L2_CTRL_TYPE_CTRL_CLASS Controls
    • 2.15.16. Adding Notify Callbacks
    • 2.15.17. v4l2_ctrl functions and data structures
      • v4l2_ctrl_ptr
      • v4l2_ctrl_ptr_create()
      • v4l2_ctrl_ops
      • v4l2_ctrl_type_ops
      • v4l2_ctrl_notify_fnc
      • v4l2_ctrl
      • v4l2_ctrl_ref
      • v4l2_ctrl_handler
      • v4l2_ctrl_config
      • v4l2_ctrl_fill()
      • v4l2_ctrl_handler_init_class()
      • v4l2_ctrl_handler_init
      • v4l2_ctrl_handler_free()
      • v4l2_ctrl_lock()
      • v4l2_ctrl_unlock()
      • __v4l2_ctrl_handler_setup()
      • v4l2_ctrl_handler_setup()
      • v4l2_ctrl_handler_log_status()
      • v4l2_ctrl_new_custom()
      • v4l2_ctrl_new_std()
      • v4l2_ctrl_new_std_menu()
      • v4l2_ctrl_new_std_menu_items()
      • v4l2_ctrl_new_std_compound()
      • v4l2_ctrl_new_int_menu()
      • v4l2_ctrl_filter
      • v4l2_ctrl_add_handler()
      • v4l2_ctrl_radio_filter()
      • v4l2_ctrl_cluster()
      • v4l2_ctrl_auto_cluster()
      • v4l2_ctrl_find()
      • v4l2_ctrl_activate()
      • __v4l2_ctrl_grab()
      • v4l2_ctrl_grab()
      • __v4l2_ctrl_modify_range()
      • v4l2_ctrl_modify_range()
      • __v4l2_ctrl_modify_dimensions()
      • v4l2_ctrl_modify_dimensions()
      • v4l2_ctrl_notify()
      • v4l2_ctrl_get_name()
      • v4l2_ctrl_get_menu()
      • v4l2_ctrl_get_int_menu()
      • v4l2_ctrl_g_ctrl()
      • __v4l2_ctrl_s_ctrl()
      • v4l2_ctrl_s_ctrl()
      • v4l2_ctrl_g_ctrl_int64()
      • __v4l2_ctrl_s_ctrl_int64()
      • v4l2_ctrl_s_ctrl_int64()
      • __v4l2_ctrl_s_ctrl_string()
      • v4l2_ctrl_s_ctrl_string()
      • __v4l2_ctrl_s_ctrl_compound()
      • v4l2_ctrl_s_ctrl_compound()
      • v4l2_ctrl_replace()
      • v4l2_ctrl_merge()
      • v4l2_ctrl_log_status()
      • v4l2_ctrl_subscribe_event()
      • v4l2_ctrl_poll()
      • v4l2_ctrl_request_setup()
      • v4l2_ctrl_request_complete()
      • v4l2_ctrl_request_hdl_find()
      • v4l2_ctrl_request_hdl_put()
      • v4l2_ctrl_request_hdl_ctrl_find()
      • v4l2_queryctrl()
      • v4l2_query_ext_ctrl_to_v4l2_queryctrl()
      • v4l2_query_ext_ctrl()
      • v4l2_querymenu()
      • v4l2_g_ctrl()
      • v4l2_s_ctrl()
      • v4l2_g_ext_ctrls()
      • v4l2_try_ext_ctrls()
      • v4l2_s_ext_ctrls()
      • v4l2_ctrl_subdev_subscribe_event()
      • v4l2_ctrl_subdev_log_status()
      • v4l2_ctrl_new_fwnode_properties()
      • v4l2_ctrl_type_op_equal()
      • v4l2_ctrl_type_op_init()
      • v4l2_ctrl_type_op_log()
      • v4l2_ctrl_type_op_validate()
  • 2.16. V4L2 videobuf2 functions and data structures
    • vb2_memory
    • vb2_mem_ops
    • vb2_plane
    • vb2_io_modes
    • vb2_buffer_state
    • vb2_buffer
    • vb2_ops
    • vb2_buf_ops
    • vb2_queue
    • vb2_queue_allows_cache_hints()
    • vb2_plane_vaddr()
    • vb2_plane_cookie()
    • vb2_buffer_done()
    • vb2_discard_done()
    • vb2_wait_for_all_buffers()
    • vb2_core_querybuf()
    • vb2_core_reqbufs()
    • vb2_core_create_bufs()
    • vb2_core_prepare_buf()
    • vb2_core_remove_bufs()
    • vb2_core_qbuf()
    • vb2_core_dqbuf()
    • vb2_core_streamon()
    • vb2_core_streamoff()
    • vb2_core_expbuf()
    • vb2_core_queue_init()
    • vb2_core_queue_release()
    • vb2_queue_error()
    • vb2_mmap()
    • vb2_get_unmapped_area()
    • vb2_core_poll()
    • vb2_read()
    • vb2_write()
    • vb2_thread_fnc
    • vb2_thread_start()
    • vb2_thread_stop()
    • vb2_is_streaming()
    • vb2_fileio_is_active()
    • vb2_get_num_buffers()
    • vb2_is_busy()
    • vb2_get_drv_priv()
    • vb2_set_plane_payload()
    • vb2_get_plane_payload()
    • vb2_plane_size()
    • vb2_start_streaming_called()
    • vb2_clear_last_buffer_dequeued()
    • vb2_get_buffer()
    • vb2_buffer_in_use()
    • vb2_verify_memory_type()
    • vb2_request_object_is_buffer()
    • vb2_request_buffer_cnt()
    • vb2_v4l2_buffer
    • vb2_find_buffer()
    • vb2_reqbufs()
    • vb2_create_bufs()
    • vb2_prepare_buf()
    • vb2_qbuf()
    • vb2_expbuf()
    • vb2_dqbuf()
    • vb2_streamon()
    • vb2_streamoff()
    • vb2_queue_init()
    • vb2_queue_init_name()
    • vb2_queue_release()
    • vb2_queue_change_type()
    • vb2_poll()
    • vb2_queue_is_busy()
    • vb2_video_unregister_device()
    • vb2_ops_wait_prepare()
    • vb2_ops_wait_finish()
    • vb2_vmarea_handler
  • 2.17. V4L2 DV Timings functions
    • v4l2_calc_timeperframe()
    • v4l2_check_dv_timings_fnc
    • v4l2_valid_dv_timings()
    • v4l2_enum_dv_timings_cap()
    • v4l2_find_dv_timings_cap()
    • v4l2_find_dv_timings_cea861_vic()
    • v4l2_match_dv_timings()
    • v4l2_print_dv_timings()
    • v4l2_detect_cvt()
    • v4l2_detect_gtf()
    • v4l2_calc_aspect_ratio()
    • v4l2_dv_timings_aspect_ratio()
    • can_reduce_fps()
    • v4l2_hdmi_colorimetry
  • 2.18. V4L2 flash functions and data structures
    • v4l2_flash_ctrl_data
    • v4l2_flash_ops
    • v4l2_flash_config
    • v4l2_flash
    • v4l2_subdev_to_v4l2_flash()
    • v4l2_ctrl_to_v4l2_flash()
    • v4l2_flash_init()
    • v4l2_flash_indicator_init()
    • v4l2_flash_release()
  • 2.19. V4L2 Media Controller functions and data structures
    • v4l2_mc_create_media_graph()
    • v4l_enable_media_source()
    • v4l_disable_media_source()
    • v4l2_create_fwnode_links_to_pad()
    • v4l2_create_fwnode_links()
    • v4l2_pipeline_pm_get()
    • v4l2_pipeline_pm_put()
    • v4l2_pipeline_link_notify()
  • 2.20. V4L2 Media Bus functions and data structures
    • v4l2_mbus_csi2_cphy_line_orders_type
    • v4l2_mbus_config_mipi_csi2
    • v4l2_mbus_config_parallel
    • v4l2_mbus_config_mipi_csi1
    • v4l2_mbus_type
    • v4l2_mbus_config
    • v4l2_fill_pix_format()
    • v4l2_fill_mbus_format()
    • v4l2_fill_pix_format_mplane()
    • v4l2_fill_mbus_format_mplane()
  • 2.21. V4L2 Memory to Memory functions and data structures
    • v4l2_m2m_ops
    • v4l2_m2m_queue_ctx
    • v4l2_m2m_ctx
    • v4l2_m2m_buffer
    • v4l2_m2m_get_curr_priv()
    • v4l2_m2m_get_vq()
    • v4l2_m2m_try_schedule()
    • v4l2_m2m_job_finish()
    • v4l2_m2m_buf_done_and_job_finish()
    • v4l2_m2m_clear_state()
    • v4l2_m2m_mark_stopped()
    • v4l2_m2m_dst_buf_is_last()
    • v4l2_m2m_has_stopped()
    • v4l2_m2m_is_last_draining_src_buf()
    • v4l2_m2m_last_buffer_done()
    • v4l2_m2m_suspend()
    • v4l2_m2m_resume()
    • v4l2_m2m_reqbufs()
    • v4l2_m2m_querybuf()
    • v4l2_m2m_qbuf()
    • v4l2_m2m_dqbuf()
    • v4l2_m2m_prepare_buf()
    • v4l2_m2m_create_bufs()
    • v4l2_m2m_expbuf()
    • v4l2_m2m_streamon()
    • v4l2_m2m_streamoff()
    • v4l2_m2m_update_start_streaming_state()
    • v4l2_m2m_update_stop_streaming_state()
    • v4l2_m2m_encoder_cmd()
    • v4l2_m2m_decoder_cmd()
    • v4l2_m2m_poll()
    • v4l2_m2m_mmap()
    • v4l2_m2m_init()
    • v4l2_m2m_release()
    • v4l2_m2m_ctx_init()
    • v4l2_m2m_ctx_release()
    • v4l2_m2m_buf_queue()
    • v4l2_m2m_num_src_bufs_ready()
    • v4l2_m2m_num_dst_bufs_ready()
    • v4l2_m2m_next_buf()
    • v4l2_m2m_next_src_buf()
    • v4l2_m2m_next_dst_buf()
    • v4l2_m2m_last_buf()
    • v4l2_m2m_last_src_buf()
    • v4l2_m2m_last_dst_buf()
    • v4l2_m2m_for_each_dst_buf
    • v4l2_m2m_for_each_src_buf
    • v4l2_m2m_for_each_dst_buf_safe
    • v4l2_m2m_for_each_src_buf_safe
    • v4l2_m2m_get_src_vq()
    • v4l2_m2m_get_dst_vq()
    • v4l2_m2m_buf_remove()
    • v4l2_m2m_src_buf_remove()
    • v4l2_m2m_dst_buf_remove()
    • v4l2_m2m_buf_remove_by_buf()
    • v4l2_m2m_src_buf_remove_by_buf()
    • v4l2_m2m_dst_buf_remove_by_buf()
    • v4l2_m2m_buf_copy_metadata()
  • 2.22. V4L2 async kAPI
    • v4l2_async_match_type
    • v4l2_async_match_desc
    • v4l2_async_connection
    • v4l2_async_notifier_operations
    • v4l2_async_notifier
    • v4l2_async_subdev_endpoint
    • v4l2_async_debug_init()
    • v4l2_async_nf_init()
    • v4l2_async_subdev_nf_init()
    • v4l2_async_nf_add_fwnode
    • v4l2_async_nf_add_fwnode_remote
    • v4l2_async_nf_add_i2c
    • v4l2_async_subdev_endpoint_add()
    • v4l2_async_connection_unique()
    • v4l2_async_nf_register()
    • v4l2_async_nf_unregister()
    • v4l2_async_nf_cleanup()
    • v4l2_async_register_subdev
    • v4l2_async_register_subdev_sensor()
    • v4l2_async_unregister_subdev()
  • 2.23. V4L2 fwnode kAPI
    • v4l2_fwnode_endpoint
    • V4L2_FWNODE_PROPERTY_UNSET
    • v4l2_fwnode_orientation
    • v4l2_fwnode_device_properties
    • v4l2_fwnode_link
    • v4l2_connector_type
    • v4l2_connector_link
    • v4l2_fwnode_connector_analog
    • v4l2_fwnode_connector
    • v4l2_fwnode_bus_type
    • v4l2_fwnode_endpoint_parse()
    • v4l2_fwnode_endpoint_free()
    • v4l2_fwnode_endpoint_alloc_parse()
    • v4l2_fwnode_parse_link()
    • v4l2_fwnode_put_link()
    • v4l2_fwnode_connector_free()
    • v4l2_fwnode_connector_parse()
    • v4l2_fwnode_connector_add_link()
    • v4l2_fwnode_device_parse()
  • 2.24. V4L2 CCI kAPI
    • cci_reg_sequence
    • cci_read()
    • cci_write()
    • cci_update_bits()
    • cci_multi_reg_write()
    • devm_cci_regmap_init_i2c()
  • 2.25. V4L2 rect helper functions
    • v4l2_rect_set_size_to()
    • v4l2_rect_set_min_size()
    • v4l2_rect_set_max_size()
    • v4l2_rect_map_inside()
    • v4l2_rect_same_size()
    • v4l2_rect_same_position()
    • v4l2_rect_equal()
    • v4l2_rect_intersect()
    • v4l2_rect_scale()
    • v4l2_rect_overlap()
    • v4l2_rect_enclosed()
  • 2.26. Tuner functions and data structures
    • tuner_mode
    • tuner_setup
    • param_type
    • tuner_range
    • tuner_params
    • tunertype
  • 2.27. V4L2 common functions and data structures
    • v4l2_ctrl_query_fill()
    • v4l2_i2c_tuner_type
    • v4l2_i2c_new_subdev()
    • v4l2_i2c_new_subdev_board()
    • v4l2_i2c_subdev_set_name()
    • v4l2_i2c_subdev_init()
    • v4l2_i2c_subdev_addr()
    • v4l2_i2c_tuner_addrs()
    • v4l2_i2c_subdev_unregister()
    • v4l2_spi_new_subdev()
    • v4l2_spi_subdev_init()
    • v4l2_spi_subdev_unregister()
    • v4l_bound_align_image()
    • v4l2_find_nearest_size_conditional
    • v4l2_find_nearest_size
    • v4l2_g_parm_cap()
    • v4l2_s_parm_cap()
    • v4l2_pixel_encoding
    • v4l2_format_info
    • v4l2_get_link_freq()
    • v4l2_get_active_data_lanes()
    • v4l2_link_freq_to_bitmap()
    • devm_v4l2_sensor_clk_get()
    • devm_v4l2_sensor_clk_get_legacy()
    • v4l2_ioctl_ops
    • v4l2_norm_to_name()
    • v4l2_video_std_frame_period()
    • v4l2_video_std_construct()
    • v4l_video_std_enumstd()
    • v4l_printk_ioctl()
    • v4l2_compat_ioctl32()
    • v4l2_kioctl
    • video_usercopy()
    • video_ioctl2()
  • 2.28. Hauppauge TV EEPROM functions and data structures
    • tveeprom_audio_processor
    • tveeprom
    • tveeprom_hauppauge_analog()
    • tveeprom_read()
  • 2.29. V4L2 JPEG header related functions and data structures
    • v4l2_jpeg_reference
    • v4l2_jpeg_frame_component_spec
    • v4l2_jpeg_frame_header
    • v4l2_jpeg_scan_component_spec
    • v4l2_jpeg_scan_header
    • v4l2_jpeg_app14_tf
    • v4l2_jpeg_header
    • v4l2_jpeg_parse_header()
  • 2.30. V4L2 generic ISP parameters and statistics support
    • 2.30.1. Design rationale
    • 2.30.2. V4L2 ISP configuration parameters
    • 2.30.3. V4L2 ISP support driver documentation
      • v4l2_isp_params_buffer_size
      • v4l2_isp_params_validate_buffer_size()
      • v4l2_isp_params_block_type_info
      • v4l2_isp_params_validate_buffer()
• 3. Digital TV (DVB) devices
  • 3.1. Digital TV Common functions
    • 3.1.1. DVB devices
      • dvb_device_type
      • dvb_adapter
      • dvb_device
      • dvbdevfops_node
      • dvb_device_get()
      • dvb_device_put()
      • dvb_register_adapter()
      • dvb_unregister_adapter()
      • dvb_register_device()
      • dvb_remove_device()
      • dvb_unregister_device()
      • dvb_create_media_graph()
      • dvb_register_media_controller()
      • dvb_get_media_controller()
      • dvb_generic_open()
      • dvb_generic_release()
      • dvb_generic_ioctl()
      • dvb_usercopy()
      • dvb_module_probe()
      • dvb_module_release()
      • dvb_attach
      • dvb_detach
    • 3.1.2. Digital TV Ring buffer
      • dvb_ringbuffer
      • dvb_ringbuffer_init()
      • dvb_ringbuffer_empty()
      • dvb_ringbuffer_free()
      • dvb_ringbuffer_avail()
      • dvb_ringbuffer_reset()
      • dvb_ringbuffer_flush()
      • dvb_ringbuffer_flush_spinlock_wakeup()
      • DVB_RINGBUFFER_PEEK
      • DVB_RINGBUFFER_SKIP
      • dvb_ringbuffer_read_user()
      • dvb_ringbuffer_read()
      • DVB_RINGBUFFER_WRITE_BYTE
      • dvb_ringbuffer_write()
      • dvb_ringbuffer_write_user()
      • dvb_ringbuffer_pkt_write()
      • dvb_ringbuffer_pkt_read_user()
      • dvb_ringbuffer_pkt_read()
      • dvb_ringbuffer_pkt_dispose()
      • dvb_ringbuffer_pkt_next()
    • 3.1.3. Digital TV VB2 handler
      • dvb_buf_type
      • dvb_vb2_states
      • dvb_buffer
      • dvb_vb2_ctx
      • dvb_vb2_init()
      • dvb_vb2_release()
      • dvb_vb2_is_streaming()
      • dvb_vb2_fill_buffer()
      • dvb_vb2_poll()
      • dvb_vb2_stream_on()
      • dvb_vb2_stream_off()
      • dvb_vb2_reqbufs()
      • dvb_vb2_querybuf()
      • dvb_vb2_expbuf()
      • dvb_vb2_qbuf()
      • dvb_vb2_dqbuf()
      • dvb_vb2_mmap()
  • 3.2. Digital TV Frontend kABI
    • 3.2.1. Digital TV Frontend
      • 3.2.1.1. Demodulator driver
      • 3.2.1.2. Attaching frontend driver to the bridge driver
    • 3.2.2. Digital TV Frontend statistics
      • 3.2.2.1. Introduction
      • 3.2.2.2. Groups of statistics
      • 3.2.2.3. Statistics collection
        • 3.2.2.3.1. if the driver have a bit that indicates when a collected data is ready
        • 3.2.2.3.2. If the driver doesn’t provide a statistics available check bit
    • 3.2.3. Digital TV Frontend functions and types
      • dvb_frontend_tune_settings
      • dvb_tuner_info
      • analog_parameters
      • dvbfe_algo
      • dvbfe_search
      • dvb_tuner_ops
      • analog_demod_info
      • analog_demod_ops
      • dvb_frontend_internal_info
      • dvb_frontend_ops
      • dtv_frontend_properties
      • dvb_frontend
      • dvb_register_frontend()
      • dvb_unregister_frontend()
      • dvb_frontend_detach()
      • dvb_frontend_suspend()
      • dvb_frontend_resume()
      • dvb_frontend_reinitialise()
      • dvb_frontend_sleep_until()
  • 3.3. Digital TV Demux kABI
    • 3.3.1. Digital TV Demux
    • 3.3.2. Demux Callback API
    • 3.3.3. Digital TV Demux device registration functions and data structures
      • dmxdev_type
      • dmxdev_state
      • dmxdev_feed
      • dmxdev_filter
      • dmxdev
      • dvb_dmxdev_init()
      • dvb_dmxdev_release()
    • 3.3.4. High-level Digital TV demux interface
      • dvb_dmx_filter_type
      • dvb_dmx_state
      • dvb_demux_filter
      • dvb_demux_feed
      • dvb_demux
      • dvb_dmx_init()
      • dvb_dmx_release()
      • dvb_dmx_swfilter_packets()
      • dvb_dmx_swfilter()
      • dvb_dmx_swfilter_204()
      • dvb_dmx_swfilter_raw()
    • 3.3.5. Driver-internal low-level hardware specific driver demux interface
      • ts_filter_type
      • dmx_ts_feed
      • dmx_section_filter
      • dmx_section_feed
      • dmx_ts_cb
      • dmx_section_cb
      • dmx_frontend_source
      • dmx_frontend
      • dmx_demux_caps
      • DMX_FE_ENTRY
      • dmx_demux
  • 3.4. Digital TV Conditional Access kABI
    • dvb_ca_en50221
    • dvb_ca_en50221_camchange_irq()
    • dvb_ca_en50221_camready_irq()
    • dvb_ca_en50221_frda_irq()
    • dvb_ca_en50221_init()
    • dvb_ca_en50221_release()
  • 3.5. Digital TV Network kABI
    • dvb_net
    • dvb_net_init()
    • dvb_net_release()
• 4. Remote Controller devices
  • 4.1. Remote Controller core
    • 4.1.1. Remote controller data structures and functions
      • rc_driver_type
      • rc_scancode_filter
      • rc_filter_type
      • lirc_fh
      • rc_dev
      • rc_allocate_device()
      • devm_rc_allocate_device()
      • rc_free_device()
      • rc_register_device()
      • devm_rc_register_device()
      • rc_unregister_device()
      • rc_map_table
      • rc_map
      • rc_map_list
      • rc_map_register()
      • rc_map_unregister()
      • rc_map_get()
• 5. Media Controller devices
  • 5.1. Media Controller
    • 5.1.1. Abstract media device model
    • 5.1.2. Media device
    • 5.1.3. Entities
    • 5.1.4. Interfaces
    • 5.1.5. Pads
    • 5.1.6. Links
    • 5.1.7. Graph traversal
    • 5.1.8. Use count and power handling
    • 5.1.9. Links setup
    • 5.1.10. Pipelines and media streams
    • 5.1.11. Link validation
    • 5.1.12. Pipeline traversal
    • 5.1.13. Media Controller Device Allocator API
    • 5.1.14. API Definitions
      • media_entity_notify
      • media_device_ops
      • media_device
      • media_device_init()
      • media_device_cleanup()
      • __media_device_register()
      • media_device_register
      • media_device_unregister()
      • media_device_register_entity()
      • media_device_unregister_entity()
      • media_device_register_entity_notify()
      • media_device_unregister_entity_notify()
      • media_device_pci_init()
      • __media_device_usb_init()
      • media_device_usb_init
      • media_set_bus_info()
      • media_file_operations
      • media_devnode
      • media_devnode_register()
      • media_devnode_unregister_prepare()
      • media_devnode_unregister()
      • media_devnode_data()
      • media_devnode_is_registered()
      • media_gobj_type
      • media_gobj
      • media_entity_enum
      • media_graph
      • media_pipeline
      • media_pipeline_pad
      • media_pipeline_pad_iter
      • media_pipeline_entity_iter
      • media_link
      • media_pad_signal_type
      • media_pad
      • media_entity_operations
      • media_entity_type
      • media_entity
      • media_entity_for_each_pad
      • media_interface
      • media_intf_devnode
      • media_entity_id()
      • media_type()
      • media_id()
      • media_gobj_gen_id()
      • is_media_entity_v4l2_video_device()
      • is_media_entity_v4l2_subdev()
      • media_entity_enum_init()
      • media_entity_enum_cleanup()
      • media_entity_enum_zero()
      • media_entity_enum_set()
      • media_entity_enum_clear()
      • media_entity_enum_test()
      • media_entity_enum_test_and_set()
      • media_entity_enum_empty()
      • media_entity_enum_intersects()
      • gobj_to_entity
      • gobj_to_pad
      • gobj_to_link
      • gobj_to_intf
      • intf_to_devnode
      • media_gobj_create()
      • media_gobj_destroy()
      • media_entity_pads_init()
      • media_entity_cleanup()
      • media_get_pad_index()
      • media_create_pad_link()
      • media_create_pad_links()
      • media_entity_remove_links()
      • __media_entity_setup_link()
      • media_entity_setup_link()
      • media_entity_find_link()
      • media_pad_remote_pad_first()
      • media_pad_remote_pad_unique()
      • media_entity_remote_pad_unique()
      • media_entity_remote_source_pad_unique()
      • media_pad_is_streaming()
      • media_entity_is_streaming()
      • media_entity_pipeline()
      • media_pad_pipeline()
      • media_entity_get_fwnode_pad()
      • media_graph_walk_init()
      • media_graph_walk_cleanup()
      • media_graph_walk_start()
      • media_graph_walk_next()
      • media_pipeline_start()
      • __media_pipeline_start()
      • media_pipeline_stop()
      • __media_pipeline_stop()
      • media_pipeline_for_each_pad
      • media_pipeline_entity_iter_init()
      • media_pipeline_entity_iter_cleanup()
      • media_pipeline_for_each_entity
      • media_pipeline_alloc_start()
      • media_devnode_create()
      • media_devnode_remove()
      • media_create_intf_link()
      • __media_remove_intf_link()
      • media_remove_intf_link()
      • __media_remove_intf_links()
      • media_remove_intf_links()
      • media_entity_call
      • media_create_ancillary_link()
      • __media_entity_next_link()
      • for_each_media_entity_data_link
      • media_request_state
      • media_request
      • media_request_lock_for_access()
      • media_request_unlock_for_access()
      • media_request_lock_for_update()
      • media_request_unlock_for_update()
      • media_request_get()
      • media_request_put()
      • media_request_get_by_fd()
      • media_request_alloc()
      • media_request_object_ops
      • media_request_object
      • media_request_object_get()
      • media_request_object_put()
      • media_request_object_find()
      • media_request_object_init()
      • media_request_object_bind()
      • media_request_object_unbind()
      • media_request_object_complete()
      • media_device_usb_allocate()
      • media_device_delete()
• 6. CEC Kernel Support
  • 6.1. The CEC Protocol
  • 6.2. CEC Adapter Interface
    • cec_allocate_adapter()
    • cec_delete_adapter()
    • cec_get_drvdata()
    • cec_register_adapter()
    • cec_unregister_adapter()
  • 6.3. Implementing the Low-Level CEC Adapter
    • cec_adap_ops
    • cec_received_msg()
  • 6.4. Implementing the interrupt handler
  • 6.5. Optional: Implementing Error Injection Support
  • 6.6. Implementing the High-Level CEC Adapter
  • 6.7. CEC framework functions
    • cec_transmit_msg()
    • cec_s_phys_addr()
    • cec_s_phys_addr_from_edid()
    • cec_s_log_addrs()
  • 6.8. CEC Pin framework
    • cec_pin_ops
    • cec_pin_changed()
    • cec_pin_allocate_adapter()
  • 6.9. CEC Notifier framework
    • cec_notifier_conn_register()
    • cec_notifier_conn_unregister()
    • cec_notifier_cec_adap_register()
    • cec_notifier_cec_adap_unregister()
    • cec_notifier_set_phys_addr()
    • cec_notifier_set_phys_addr_from_edid()
    • cec_notifier_parse_hdmi_phandle()
    • cec_notifier_phys_addr_invalidate()
• 7. Pixel data transmitter and receiver drivers
  • 7.1. Bus types
    • 7.1.1. MIPI CSI-2
    • 7.1.2. Parallel and BT.656
  • 7.2. Transmitter drivers
    • 7.2.1. Media bus pixel code
    • 7.2.2. Link frequency
    • 7.2.3. .enable_streams() and .disable_streams() callbacks
    • 7.2.4. Stopping the transmitter
  • 7.3. CSI-2 transmitter drivers
    • 7.3.1. Pixel rate
    • 7.3.2. LP-11 and LP-111 states
• 8. Writing camera sensor drivers
  • 8.1. CSI-2, parallel and BT.656 buses
  • 8.2. Handling clocks
    • 8.2.1. ACPI
    • 8.2.2. Devicetree
  • 8.3. Power management
    • 8.3.1. Control framework
      • pm_runtime_get_if_in_use()
  • 8.4. Rotation, orientation and flipping
  • 8.5. Example drivers
• 9. Media driver-specific documentation
  • 9.1. Video4Linux (V4L) drivers
    • 9.1.1. The bttv driver
      • 9.1.1.1. bttv and sound mini howto
        • 9.1.1.1.1. How sound works in detail
    • 9.1.2. The cx2341x driver
      • 9.1.2.1. Memory at cx2341x chips
        • 9.1.2.1.1. Memory Map
        • 9.1.2.1.2. Registers
        • 9.1.2.1.3. Interrupt Status Register
      • 9.1.2.2. Missing documentation
      • 9.1.2.3. The cx2341x firmware upload
        • 9.1.2.3.1. How to find
        • 9.1.2.3.2. How to load
      • 9.1.2.4. How to call the firmware API
      • 9.1.2.5. OSD firmware API description
        • 9.1.2.5.1. CX2341X_OSD_GET_FRAMEBUFFER
        • 9.1.2.5.2. CX2341X_OSD_GET_PIXEL_FORMAT
        • 9.1.2.5.3. CX2341X_OSD_SET_PIXEL_FORMAT
        • 9.1.2.5.4. CX2341X_OSD_GET_STATE
        • 9.1.2.5.5. CX2341X_OSD_SET_STATE
        • 9.1.2.5.6. CX2341X_OSD_GET_OSD_COORDS
        • 9.1.2.5.7. CX2341X_OSD_SET_OSD_COORDS
        • 9.1.2.5.8. CX2341X_OSD_GET_SCREEN_COORDS
        • 9.1.2.5.9. CX2341X_OSD_SET_SCREEN_COORDS
        • 9.1.2.5.10. CX2341X_OSD_GET_GLOBAL_ALPHA
        • 9.1.2.5.11. CX2341X_OSD_SET_GLOBAL_ALPHA
        • 9.1.2.5.12. CX2341X_OSD_SET_BLEND_COORDS
        • 9.1.2.5.13. CX2341X_OSD_GET_FLICKER_STATE
        • 9.1.2.5.14. CX2341X_OSD_SET_FLICKER_STATE
        • 9.1.2.5.15. CX2341X_OSD_BLT_COPY
        • 9.1.2.5.16. CX2341X_OSD_BLT_FILL
        • 9.1.2.5.17. CX2341X_OSD_BLT_TEXT
        • 9.1.2.5.18. CX2341X_OSD_SET_FRAMEBUFFER_WINDOW
        • 9.1.2.5.19. CX2341X_OSD_SET_CHROMA_KEY
        • 9.1.2.5.20. CX2341X_OSD_GET_ALPHA_CONTENT_INDEX
        • 9.1.2.5.21. CX2341X_OSD_SET_ALPHA_CONTENT_INDEX
      • 9.1.2.6. Encoder firmware API description
        • 9.1.2.6.1. CX2341X_ENC_PING_FW
        • 9.1.2.6.2. CX2341X_ENC_START_CAPTURE
        • 9.1.2.6.3. CX2341X_ENC_STOP_CAPTURE
        • 9.1.2.6.4. CX2341X_ENC_SET_AUDIO_ID
        • 9.1.2.6.5. CX2341X_ENC_SET_VIDEO_ID
        • 9.1.2.6.6. CX2341X_ENC_SET_PCR_ID
        • 9.1.2.6.7. CX2341X_ENC_SET_FRAME_RATE
        • 9.1.2.6.8. CX2341X_ENC_SET_FRAME_SIZE
        • 9.1.2.6.9. CX2341X_ENC_SET_BIT_RATE
        • 9.1.2.6.10. CX2341X_ENC_SET_GOP_PROPERTIES
        • 9.1.2.6.11. CX2341X_ENC_SET_ASPECT_RATIO
        • 9.1.2.6.12. CX2341X_ENC_SET_DNR_FILTER_MODE
        • 9.1.2.6.13. CX2341X_ENC_SET_DNR_FILTER_PROPS
        • 9.1.2.6.14. CX2341X_ENC_SET_CORING_LEVELS
        • 9.1.2.6.15. CX2341X_ENC_SET_SPATIAL_FILTER_TYPE
        • 9.1.2.6.16. CX2341X_ENC_SET_VBI_LINE
        • 9.1.2.6.17. CX2341X_ENC_SET_STREAM_TYPE
        • 9.1.2.6.18. CX2341X_ENC_SET_OUTPUT_PORT
        • 9.1.2.6.19. CX2341X_ENC_SET_AUDIO_PROPERTIES
        • 9.1.2.6.20. CX2341X_ENC_HALT_FW
        • 9.1.2.6.21. CX2341X_ENC_GET_VERSION
        • 9.1.2.6.22. CX2341X_ENC_SET_GOP_CLOSURE
        • 9.1.2.6.23. CX2341X_ENC_GET_SEQ_END
        • 9.1.2.6.24. CX2341X_ENC_SET_PGM_INDEX_INFO
        • 9.1.2.6.25. CX2341X_ENC_SET_VBI_CONFIG
        • 9.1.2.6.26. CX2341X_ENC_SET_DMA_BLOCK_SIZE
        • 9.1.2.6.27. CX2341X_ENC_GET_PREV_DMA_INFO_MB_10
        • 9.1.2.6.28. CX2341X_ENC_GET_PREV_DMA_INFO_MB_9
        • 9.1.2.6.29. CX2341X_ENC_SCHED_DMA_TO_HOST
        • 9.1.2.6.30. CX2341X_ENC_INITIALIZE_INPUT
        • 9.1.2.6.31. CX2341X_ENC_SET_FRAME_DROP_RATE
        • 9.1.2.6.32. CX2341X_ENC_PAUSE_ENCODER
        • 9.1.2.6.33. CX2341X_ENC_REFRESH_INPUT
        • 9.1.2.6.34. CX2341X_ENC_SET_COPYRIGHT
        • 9.1.2.6.35. CX2341X_ENC_SET_EVENT_NOTIFICATION
        • 9.1.2.6.36. CX2341X_ENC_SET_NUM_VSYNC_LINES
        • 9.1.2.6.37. CX2341X_ENC_SET_PLACEHOLDER
        • 9.1.2.6.38. CX2341X_ENC_MUTE_VIDEO
        • 9.1.2.6.39. CX2341X_ENC_MUTE_AUDIO
        • 9.1.2.6.40. CX2341X_ENC_SET_VERT_CROP_LINE
        • 9.1.2.6.41. CX2341X_ENC_MISC
      • 9.1.2.7. Decoder firmware API description
        • 9.1.2.7.1. CX2341X_DEC_PING_FW
        • 9.1.2.7.2. CX2341X_DEC_START_PLAYBACK
        • 9.1.2.7.3. CX2341X_DEC_STOP_PLAYBACK
        • 9.1.2.7.4. CX2341X_DEC_SET_PLAYBACK_SPEED
        • 9.1.2.7.5. CX2341X_DEC_STEP_VIDEO
        • 9.1.2.7.6. CX2341X_DEC_SET_DMA_BLOCK_SIZE
        • 9.1.2.7.7. CX2341X_DEC_GET_XFER_INFO
        • 9.1.2.7.8. CX2341X_DEC_GET_DMA_STATUS
        • 9.1.2.7.9. CX2341X_DEC_SCHED_DMA_FROM_HOST
        • 9.1.2.7.10. CX2341X_DEC_PAUSE_PLAYBACK
        • 9.1.2.7.11. CX2341X_DEC_HALT_FW
        • 9.1.2.7.12. CX2341X_DEC_SET_STANDARD
        • 9.1.2.7.13. CX2341X_DEC_GET_VERSION
        • 9.1.2.7.14. CX2341X_DEC_SET_STREAM_INPUT
        • 9.1.2.7.15. CX2341X_DEC_GET_TIMING_INFO
        • 9.1.2.7.16. CX2341X_DEC_SET_AUDIO_MODE
        • 9.1.2.7.17. CX2341X_DEC_SET_EVENT_NOTIFICATION
        • 9.1.2.7.18. CX2341X_DEC_SET_DISPLAY_BUFFERS
        • 9.1.2.7.19. CX2341X_DEC_EXTRACT_VBI
        • 9.1.2.7.20. CX2341X_DEC_SET_DECODER_SOURCE
        • 9.1.2.7.21. CX2341X_DEC_SET_PREBUFFERING
      • 9.1.2.8. PVR350 Video decoder registers 0x02002800 -> 0x02002B00
      • 9.1.2.9. The cx231xx DMA engine
        • 9.1.2.9.1. Introduction
        • 9.1.2.9.2. Flow
        • 9.1.2.9.3. Mailbox #10
        • 9.1.2.9.4. Scatter-Gather Array
        • 9.1.2.9.5. DMA Transfer Status
    • 9.1.3. The cx88 driver
      • 9.1.3.1. Documentation missing at the cx88 datasheet
      • 9.1.3.2. Hauppauge WinTV cx88 IR information
        • 9.1.3.2.1. Additional info
    • 9.1.4. The Samsung S5P/EXYNOS4 FIMC driver
      • 9.1.4.1. Files partitioning
    • 9.1.5. The pvrusb2 driver
      • 9.1.5.1. Background
      • 9.1.5.2. Building
      • 9.1.5.3. Source file list / functional overview
    • 9.1.6. PXA-Camera Host Driver
      • 9.1.6.1. Constraints
      • 9.1.6.2. Global video workflow
      • 9.1.6.3. DMA usage
    • 9.1.7. The Radiotrack radio driver
      • 9.1.7.1. ACKNOWLEDGMENTS
      • 9.1.7.2. WHY THIS DOCUMENT?
      • 9.1.7.3. PHYSICAL DESCRIPTION
      • 9.1.7.4. CONTROLLING THE CARD WITH IOPORT
      • 9.1.7.5. PROGRAMMING EXAMPLES
    • 9.1.8. The Rockchip Image Signal Processor Driver (rkisp1)
      • 9.1.8.1. Versions and their differences
      • 9.1.8.2. Changes from V10 to V12
      • 9.1.8.3. Changes from V12 to V13
    • 9.1.9. The saa7134 driver
      • 9.1.9.1. Card Variations:
      • 9.1.9.2. LifeView GPIOs
      • 9.1.9.3. Credits
    • 9.1.10. Cropping and Scaling algorithm, used in the sh_mobile_ceu_camera driver
      • 9.1.10.1. Terminology
      • 9.1.10.2. Generic scaling / cropping scheme
      • 9.1.10.3. S_FMT
      • 9.1.10.4. S_CROP
    • 9.1.11. Tuner drivers
      • 9.1.11.1. Simple tuner Programming
      • 9.1.11.2. Tuner Manufacturers
    • 9.1.12. The Virtual Media Controller Driver (vimc)
      • 9.1.12.1. Source code documentation
        • 9.1.12.1.1. vimc-streamer
    • 9.1.13. The Zoran driver
      • 9.1.13.1. Frequently Asked Questions
      • 9.1.13.2. What cards are supported
        • 9.1.13.2.1. Iomega Buz
        • 9.1.13.2.2. AverMedia 6 Eyes AVS6EYES
        • 9.1.13.2.3. Linux Media Labs LML33
        • 9.1.13.2.4. Linux Media Labs LML33R10
        • 9.1.13.2.5. Pinnacle/Miro DC10(new)
        • 9.1.13.2.6. Pinnacle/Miro DC10+
        • 9.1.13.2.7. Pinnacle/Miro DC10(old)
        • 9.1.13.2.8. Pinnacle/Miro DC30
        • 9.1.13.2.9. Pinnacle/Miro DC30+
      • 9.1.13.3. 1.1 What the TV decoder can do an what not
        • 9.1.13.3.1. Philips saa7111 TV decoder
        • 9.1.13.3.2. Philips saa7110a TV decoder
        • 9.1.13.3.3. Philips saa7114 TV decoder
        • 9.1.13.3.4. Brooktree bt819 TV decoder
        • 9.1.13.3.5. Micronas vpx3220a TV decoder
        • 9.1.13.3.6. Samsung ks0127 TV decoder
      • 9.1.13.4. What the TV encoder can do an what not
        • 9.1.13.4.1. Philips saa7185 TV Encoder
        • 9.1.13.4.2. Brooktree bt856 TV Encoder
        • 9.1.13.4.3. Analog Devices adv7170 TV Encoder
        • 9.1.13.4.4. Analog Devices adv7175 TV Encoder
        • 9.1.13.4.5. ITT mse3000 TV encoder
        • 9.1.13.4.6. Conexant bt866 TV encoder
      • 9.1.13.5. How do I get this damn thing to work
      • 9.1.13.6. What mainboard should I use (or why doesn’t my card work)
      • 9.1.13.7. Programming interface
      • 9.1.13.8. Applications
      • 9.1.13.9. Concerning buffer sizes, quality, output size etc.
      • 9.1.13.10. It hangs/crashes/fails/whatevers! Help!
      • 9.1.13.11. Maintainers/Contacting
      • 9.1.13.12. Driver’s License
    • 9.1.14. MIPI CCS camera sensor driver
      • 9.1.14.1. CCS static data
        • 9.1.14.1.1. CCS tools
      • 9.1.14.2. Register definition generator
        • 9.1.14.2.1. Usage
    • 9.1.15. CCS PLL calculator
      • ccs_pll_branch_fr
      • ccs_pll_branch_bk
      • ccs_pll
      • ccs_pll_branch_limits_fr
      • ccs_pll_branch_limits_bk
      • ccs_pll_limits
      • ccs_pll_calculate()
    • 9.1.16. Intel IPU6 Driver
      • 9.1.16.1. Overview
      • 9.1.16.2. Buttress
        • 9.1.16.2.1. ISYS and PSYS Power flow
        • 9.1.16.2.2. Interrupt
        • 9.1.16.2.3. Security and firmware authentication
        • 9.1.16.2.4. Global timer sync
      • 9.1.16.3. DMA and MMU
      • 9.1.16.4. Firmware file format
      • 9.1.16.5. Syscom interface
      • 9.1.16.6. Input System
        • 9.1.16.6.1. D-PHYs and CSI-2 ports lane mapping
        • 9.1.16.6.2. ISYS firmware ABIs
  • 9.2. Digital TV drivers
    • 9.2.1. Idea behind the dvb-usb-framework
      • 9.2.1.1. Supported devices
      • 9.2.1.2. How to use?
        • 9.2.1.2.1. Firmware
        • 9.2.1.2.2. Compiling
        • 9.2.1.2.3. Loading the drivers
      • 9.2.1.3. Known problems and bugs
        • 9.2.1.3.1. Adding support for devices
        • 9.2.1.3.2. USB1.1 Bandwidth limitation
        • 9.2.1.3.3. Comments
      • 9.2.1.4. 3. Acknowledgements
    • 9.2.2. Frontend drivers
      • 9.2.2.1. Frontend attach headers
        • a8293_platform_data
        • af9013_platform_data
        • ascot2e_config
        • ascot2e_attach()
        • cxd2820r_platform_data
        • cxd2820r_config
        • cxd2820r_attach()
        • drxk_config
        • drxk_attach()
        • dvb_pll_attach()
        • helene_config
        • helene_attach()
        • helene_attach_s()
        • horus3a_config
        • horus3a_attach()
        • ix2505v_config
        • ix2505v_attach()
        • m88ds3103_ts_mode
        • m88ds3103_clock_out
        • m88ds3103_platform_data
        • m88ds3103_config
        • m88ds3103_attach()
        • mb86a20s_config
        • mb86a20s_attach()
        • mn88472_config
        • rtl2830_platform_data
        • rtl2832_platform_data
        • rtl2832_sdr_platform_data
        • stb6000_attach()
        • tda10071_platform_data
        • tda826x_attach()
        • zd1301_demod_platform_data
        • zd1301_demod_get_dvb_frontend()
        • zd1301_demod_get_i2c_adapter()
        • zl10036_attach()
    • 9.2.3. vidtv: Virtual Digital TV driver
      • 9.2.3.1. Background
      • 9.2.3.2. Building vidtv
      • 9.2.3.3. Running vidtv
      • 9.2.3.4. Command-line arguments to vidtv
      • 9.2.3.5. vidtv internal structure
      • 9.2.3.6. Testing vidtv with v4l-utils
        • 9.2.3.6.1. Using dvb-fe-tool
        • 9.2.3.6.2. Using dvb-scan
        • 9.2.3.6.3. Using dvb-zap
      • 9.2.3.7. What can still be improved in vidtv
        • 9.2.3.7.1. Add debugfs integration
        • 9.2.3.7.2. Add a way to test video
        • 9.2.3.7.3. Add white noise simulation
      • 9.2.3.8. Functions and structs used within vidtv
        • vidtv_dvb
        • vidtv_channel
        • vidtv_channel_si_init()
        • vidtv_channels_init()
        • vidtv_demod_cnr_to_qual_s
        • vidtv_demod_config
        • vidtv_demod_state
        • vidtv_encoder
        • vidtv_mux_timing
        • vidtv_mux_si
        • vidtv_mux_pid_ctx
        • vidtv_mux
        • vidtv_mux_init_args
        • pes_header_write_args
        • pes_ts_header_write_args
        • pes_write_args
        • vidtv_pes_write_into()
        • psi_write_args
        • desc_write_args
        • crc32_write_args
        • header_write_args
        • vidtv_psi_sdt_service_assign()
        • vidtv_psi_desc_assign()
        • vidtv_pmt_desc_assign()
        • vidtv_sdt_desc_assign()
        • vidtv_psi_pat_program_assign()
        • vidtv_psi_pmt_stream_assign()
        • vidtv_psi_pmt_create_sec_for_each_pat_entry()
        • vidtv_psi_pmt_get_pid()
        • vidtv_psi_pat_table_update_sec_len()
        • vidtv_psi_pmt_table_update_sec_len()
        • vidtv_psi_sdt_table_update_sec_len()
        • vidtv_psi_pat_write_args
        • vidtv_psi_pat_write_into()
        • vidtv_psi_sdt_write_args
        • vidtv_psi_sdt_write_into()
        • vidtv_psi_pmt_write_args
        • vidtv_psi_pmt_write_into()
        • vidtv_psi_find_pmt_sec()
        • vidtv_psi_table_transport
        • vidtv_psi_table_nit
        • vidtv_psi_nit_write_args
        • vidtv_psi_nit_write_into()
        • vidtv_psi_eit_write_args
        • vidtv_psi_eit_write_into()
        • vidtv_psi_eit_table_update_sec_len()
        • vidtv_psi_eit_event_assign()
        • vidtv_s302m_ctx
        • vidtv_s302m_encoder_init_args
        • pcr_write_args
        • null_packet_write_args
        • vidtv_ts_null_write_into()
        • vidtv_ts_pcr_write_into()
        • vidtv_tuner_config
        • vidtv_memcpy()
        • vidtv_memset()
        • vidtv_tuner_hardware_state
        • vidtv_tuner_dev
    • 9.2.4. Contributors

Copyright © 2009-2020 : LinuxTV Developers

This documentation is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option) any
later version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.

For more details see the file COPYING in the source distribution of Linux.