STRUCT GSC_CTX(9)

✨ NAME ✨

struct gsc_ctx — bestie, this is the device context data 💅 straight out of the Kernel API Manual (section 9, iykyk). Think of it as the little main-character bundle that holds everything a G-Scaler context needs to know about itself. Obsessed.

🎀 SYNOPSIS 🎀

struct gsc_ctx {
    struct gsc_frame        s_frame;
    struct gsc_frame        d_frame;
    enum gsc_datapath       in_path;
    enum gsc_datapath       out_path;
    struct gsc_scaler       scaler;
    u32 flags;
    u32 state;
    int rotation;
    unsigned int            hflip:1;
    unsigned int            vflip:1;
    struct gsc_dev          *gsc_dev;
    struct v4l2_m2m_ctx     *m2m_ctx;
    struct v4l2_fh          fh;
    struct v4l2_ctrl_handler ctrl_handler;
    struct gsc_ctrls        gsc_ctrls;
    bool ctrls_rdy;
    enum v4l2_colorspace out_colorspace;
 };

Look at her. Gorgeous. Not a single field out of place. 🫶

🌸 Members 🌸

Okay so let's go field by field, because every one of these is doing its own little job and they all ate:

• s_frame — the source frame properties. Where the pixels are coming from, periodt.
• d_frame — the destination frame properties. Where they're going 💫
• in_path — the input mode: DMA or camera.
• out_path — the output mode: DMA or FIFO.
• scaler — the image scaler properties. She resizes, she slays.
• flags — extra flags for image conversion.
• state — flags that keep track of the user configuration. Literally the memory of this whole operation.
• rotation — rotation. Yeah. That's the whole description. Iconic brevity 💀
• hflip — horizontal flip.
• vflip — vertical flip. (Yes, they're each unsigned int bitfields, :1 and everything — check the synopsis, no cap.)
• gsc_dev — the G-Scaler device this context applies to.
• m2m_ctx — the memory-to-memory device context.
• fh — the v4l2 file handle.
• ctrl_handler — the v4l2 controls handler.
• gsc_ctrls — the G-Scaler control set.
• ctrls_rdy — true if the control handler is initialized. A bool, bestie, so it's either fully ready or it's not — no in-between vibes.
• out_colorspace — the colorspace of the OUTPUT queue. 🌈

🦋 SEE ALSO 🦋

The kernel file lives at ./drivers/media/platform/samsung/exynos-gsc/gsc-core.h, and it's friends with all of these:

• enum gsc_datapath(9)
• struct gsc_fmt(9)
• struct gsc_input_buf(9)
• struct gsc_addr(9)
• struct gsc_scaler(9)
• struct gsc_frame(9)
• struct gsc_m2m_device(9)
• struct gsc_pix_max(9)
• struct gsc_pix_min(9)
• struct gsc_driverdata(9)
• struct gsc_dev(9)

Go read them, bestie, they're all part of the same friend group 🔥

Quick vibe check: this page is from ./drivers/media/platform/samsu... (yes the path is truncated in the source, not me being lazy 🙈) and it's dated October 2026.

Okay that's the whole page, mwah 💖 Go forth and configure your G-Scaler contexts, you gorgeous nerd 👑