STRUCT HVA_STREAM(9)

okay so bestie, welcome to the struct hva_stream(9) page from the Kernel API Manual — this is the hva stream buffer (capture) struct, and we're about to go through every member like it's a group-chat roll call. no cap. 🫶

💖 NAME 💖

struct hva_stream — hva stream buffer (capture). It's giving "the buffer struct for capture," and that's the whole vibe. 💅

✨ SYNOPSIS ✨

Here's the struct in all its glory — copy it exactly, bestie:

struct hva_stream {
    struct vb2_v4l2_buffer  vbuf;
    struct list_head        list;
    dma_addr_t paddr;
    void *vaddr;
    bool prepared;
    unsigned int            size;
    unsigned int            bytesused;
};

🎀 Members 🎀

• vbuf — the video buffer information for V4L2. Literally the V4L2 buffer info, iconic.
• list — the V4L2 m2m list that the frame belongs to. Think "which group chat is this frame in?" but make it V4L2 m2m.
• paddr — the physical address, aka the one for hardware.
• vaddr — the virtual address, aka the one the kernel can read/write.
• prepared — true if vaddr/paddr are resolved. That's it, that's the flag.
• size — the size of the buffer in bytes. Numbers stay numbers.
• bytesused — the number of bytes occupied by data in the buffer. Data occupancy check, slay.

🔥 SEE ALSO 🔥

Kernel file: ./drivers/media/platform/st/sti/hva/hva.h

• struct hva_frameinfo(9)
• struct hva_streaminfo(9)
• struct hva_controls(9)
• struct hva_frame(9)
• struct hva_ctx_dbg(9)
• struct hva_ctx(9)
• struct hva_dev_dbg(9)
• struct hva_dev(9)
• struct hva_enc(9)

kisses 💋 — source/version: ./drivers/media/platform/st/st..., dated October 2026. periodt. 🧚