vb2_core_streamon(9)

💖 vb2_core_streamon — Kernel API Manual realness 💖

okay so welcome to the Kernel API Manual bestie, today we're looking at vb2_core_streamon and honestly it's giving "small function, big job" energy ✨

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✨ NAME ✨

vb2_core_streamon — the one that literally implements VB2 stream ON logic 🎬

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🦋 SYNOPSIS 🦋

int vb2_core_streamon (struct vb2_queue *q , unsigned int type );

she takes two things and she gives you back an int, no cap 💅

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🌸 ARGUMENTS 🌸

• q — pointer to struct vb2_queue with the videobuf2 queue in it. this is the queue we're hyping up, she's the main character 🫶
• type — the type of the queue to be started. for V4L2, this is defined by enum v4l2_buf_type type — like, that's literally where the type comes from, tyvm 📎

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🎀 DESCRIPTION 🎀

so this is the Videobuf2 core helper that implements the VIDIOC_STREAMON operation 😤 it doesn't get called by you directly, bestie — VB2 calls it internally by an API-specific handler, like videobuf2-v4l2.h. so it's like, backstage crew energy: you don't see her, but the show literally does not go on without her 🔥

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💀 RETURN 💀

returns zero on success; an error code otherwise. that's it, that's the vibe check ⭐

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🌈 SEE ALSO 🌈

the reading list is LONG, grab a snack 🍓

• Kernel file ./include/media/videobuf2-core.h
• enum vb2_memory(9)
• struct vb2_mem_ops(9)
• struct vb2_plane(9)
• enum vb2_io_modes(9)
• enum vb2_buffer_state(9)
• struct vb2_buffer(9)
• struct vb2_ops(9)
• struct vb2_buf_ops(9)
• struct vb2_queue(9)
• vb2_queue_allows_cache_hints(9)
• vb2_plane_vaddr(9)
• vb2_plane_cookie(9)
• vb2_buffer_done(9)
• vb2_discard_done(9)
• vb2_wait_for_all_buffers(9)
• vb2_core_querybuf(9)
• vb2_core_reqbufs(9)
• vb2_core_create_bufs(9)
• vb2_core_prepare_buf(9)
• vb2_core_remove_bufs(9)
• vb2_core_qbuf(9)
• vb2_core_dqbuf(9)
• vb2_core_streamoff(9)
• vb2_core_expbuf(9)
• vb2_core_queue_init(9)
• vb2_core_queue_release(9)
• vb2_queue_error(9)
• vb2_mmap(9)
• vb2_get_unmapped_area(9)
• vb2_core_poll(9)
• vb2_read(9)
• vb2_write(9)
• vb2_thread_fnc(9)
• vb2_thread_start(9)
• vb2_thread_stop(9)
• vb2_is_streaming(9)
• vb2_fileio_is_active(9)
• vb2_get_num_buffers(9)
• vb2_is_busy(9)
• vb2_get_drv_priv(9)
• vb2_set_plane_payload(9)
• vb2_get_plane_payload(9)
• vb2_plane_size(9)
• vb2_start_streaming_called(9)
• vb2_clear_last_buffer_dequeued(9)
• vb2_get_buffer(9)
• vb2_buffer_in_use(9)
• vb2_verify_memory_type(9)
• vb2_request_object_is_buffer(9)
• vb2_request_buffer_cnt(9)

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and that's the whole page, bestie, you ate that 💅 sign-off time: this lil gem lives in ./include/media and the version date is October 2026 — iconic, no notes 👑💜