STRUCT KOMEDA_DEV_FUNCS(9)

💅 struct komeda_dev_funcs(9) — the Kernel API Manual glow-up

okay bestie so this is a page out of the Kernel API Manual, and no cap, it's all about struct komeda_dev_funcs — the little bundle of function pointers that a chip hands over to the core so the two of them can talk. iykyk. 🎀

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✨ NAME ✨

struct komeda_dev_funcs — (yes, the original NAME line is literally just the struct and a dash, so that's the whole vibe, we love a mysterious queen 💅)

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🌸 SYNOPSIS 🌸

struct komeda_dev_funcs {
    void (*init_format_table)(struct komeda_dev *mdev);
    int (*enum_resources)(struct komeda_dev *mdev);
    void (*cleanup)(struct komeda_dev *mdev);
    int (*connect_iommu)(struct komeda_dev *mdev);
    int (*disconnect_iommu)(struct komeda_dev *mdev);
    irqreturn_t (*irq_handler)(struct komeda_dev *mdev, struct
komeda_events *events);
    int (*enable_irq)(struct komeda_dev *mdev);
    int (*disable_irq)(struct komeda_dev *mdev);
    void (*on_off_vblank)(struct komeda_dev *mdev, int master_pipe, bool
on);
    void (*dump_register)(struct komeda_dev *mdev, struct seq_file
*seq);
    int (*change_opmode)(struct komeda_dev *mdev, int new_mode);
    void (*flush)(struct komeda_dev *mdev, int master_pipe, u32
active_pipes);
 };

like, look at all those function pointers bestie — twelve of them, each one a whole personality. 🦋

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👑 Members 👑

• init_format_table — this one sets up komeda_dev->format_table, and listen: it has to be called before enum_resource. not optional. order matters, periodt. ⭐
• enum_resources — this is the CHIP's moment to report or add its pipeline and component resources to CORE. main character energy fr.
• cleanup — you call this so the chip can clean up komeda_dev->chip data. tidying up, we stan. 🧹
• connect_iommu — Optional! it connects to an external iommu. 🙈
• disconnect_iommu — Optional! it disconnects from the external iommu. the breakup arc. 💔
• irq_handler — this is how CORE gets the HW event from the CHIP when an interrupt happened. the group chat notification, basically. 🔥
• enable_irq — enables the irq. slay.
• disable_irq — disables the irq. also slay, but quieter.
• on_off_vblank — notifies the HW to on or off the vblank. it's giving toggle. 🎀
• dump_register — Optional! dumps registers to a seq_file. little data scrapbook. 💖
• change_opmode — Notify the HW to switch to a new display operation mode. glow-up time ✨
• flush — Notify the HW to flush or kickoff the update. go go go 💨

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🌈 Description 🌈

so the whole thing is supplied at the chip level, and it gets returned by the chip entry function xxx_identify. that's the pipeline, bestie — chip makes the funcs, core receives the funcs. 🫶

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💜 SEE ALSO 💜

• Kernel file ./drivers/gpu/drm/arm/display/komeda/komeda_dev.h and struct komeda_dev(9) — go read the sibling page, for real. 📚

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reminder bestie: connect_iommu, disconnect_iommu, and dump_register are the Optional ones — the rest are not playing games. also do NOT forget init_format_table before enum_resource, that's the whole rule. 😭

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okay that's the page!! mwah 💋 — this gem came from ./drivers/gpu/drm/arm/display/..., dated October 2026, and honestly? iconic. 🍓🧚💜