STRUCT ATMEL_HLCDC_DC(9)

💅 struct atmel_hlcdc_dc(9)

okay bestie, welcome to the Kernel API Manual ✨ — yes, the Kernel API Manual, that's the manual name, we're being official today. And today's main character is struct atmel_hlcdc_dc, aka the Atmel HLCDC Display Controller. It's giving hardware, it's giving display, it's giving struct. Let's get into it 🎀

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🌸 NAME

struct atmel_hlcdc_dc — the Atmel HLCDC Display Controller. That's the whole vibe. She's a display controller and she has a struct, periodt 💅

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✨ SYNOPSIS

Here's the whole thing, exactly as it is, no notes, no edits, we do not touch the source:

struct atmel_hlcdc_dc {
    const struct atmel_hlcdc_dc_desc *desc;
    struct dma_pool *dscrpool;
    struct atmel_hlcdc *hlcdc;
    struct drm_crtc *crtc;
    struct drm_device dev;
    struct atmel_hlcdc_layer *layers[ATMEL_HLCDC_MAX_LAYERS];
    struct {
      u32 imr;
      struct drm_atomic_commit *state;
    } suspend;
 };

Look at her. Nested struct and everything. We love a struct with a struct inside it — it's like a little nesting doll but make it DMA 🪆

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🦋 Members

okay this is the part where we meet everyone in the group chat, one by one 🫶

• desc — the HLCDC Display Controller description. The description of the description, very meta, we stan.
• dscrpool — a DMA coherent pool that's used to allocate DMA descriptors. It's the pool. It holds the descriptors. Iconic behavior honestly.
• hlcdc — a pointer to the atmel_hlcdc structure, which is provided by the MFD device. So it's a pointer to a thing that came from another thing. Networking, but for structs 💀
• crtc — the CRTC provided by the display controller. It's got the CRTC. As one does.
• layers — the active HLCDC layers, and it's an array of struct atmel_hlcdc_layer *layers[ATMEL_HLCDC_MAX_LAYERS], so like… many layers. Max layers, even. Slay.
• suspend — the one and only place we store the HLCDC state when entering suspend. Sleepy time storage, lowkey cozy 😴

And then suspend has her own little inner circle:

• suspend.imr — used to read/write the LCDC Interrupt Mask Register. Reading and writing. Multitalented.
• suspend.state — the Atomic commit structure. Atomic. Like the commit. Not like the science.

quick heads up bestie: struct drm_device dev; is literally right there in the struct up top, but this page doesn't give it its own Members blurb. I'm not gonna invent one for you — we keep the facts exactly as they are, no cap. 🙈

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🔥 SEE ALSO

go check these out, iykyk:

• the Kernel file ./drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
• struct atmel_lcdc_dc_ops(9)

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👑 Sign-off

this page came to you from ./drivers/gpu/drm/atmel-hlcdc, dated October 2026, and yeah — it's struct atmel_hlcdc_dc(9) all the way down, bestie. go forth and display-control 💖🌈⭐