STRUCT DPU_HW_VBIF_OPS(9)

💅 struct dpu_hw_vbif_ops — Kernel API Manual 🎀

okay so bestie, welcome to the glow-up era of struct dpu_hw_vbif_ops, your fave little interface to the VBIF hardware driver functions ✨ And before you do literally anything, the vibe check rule: these functions are assumed to be called after clocks are enabled. That's the whole prerequisite. Don't come for her before the clocks are on, fr fr 💀

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✨ SYNOPSIS ✨

struct dpu_hw_vbif_ops {
    void (*set_limit_conf)(struct dpu_hw_vbif *vbif, u32 xin_id, bool rd, u32 limit);
    u32 (*get_limit_conf)(struct dpu_hw_vbif *vbif, u32 xin_id, bool rd);
    void (*set_halt_ctrl)(struct dpu_hw_vbif *vbif, u32 xin_id, bool enable);
    bool (*get_halt_ctrl)(struct dpu_hw_vbif *vbif, u32 xin_id);
    void (*set_qos_remap)(struct dpu_hw_vbif *vbif, u32 xin_id, u32 level, u32 remap_level);
    void (*set_mem_type)(struct dpu_hw_vbif *vbif, u32 xin_id, u32 value);
    void (*clear_errors)(struct dpu_hw_vbif *vbif, u32 *pnd_errors, u32 *src_errors);
    void (*set_write_gather_en)(struct dpu_hw_vbif *vbif, u32 xin_id);
};

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👯 MEMBERS 👯

🍓 set_limit_conf

set transaction limit config 💖

• vbif — vbif context driver
• xin_id — client interface identifier
• rd — true for read limit; false for write limit
• limit — outstanding transaction limit

🌸 get_limit_conf

get transaction limit config, she's giving read-only main character energy 👑

• vbif — vbif context driver
• xin_id — client interface identifier
• rd — true for read limit; false for write limit
• return: outstanding transaction limit

🦋 set_halt_ctrl

set halt control ⭐

• vbif — vbif context driver
• xin_id — client interface identifier
• enable — halt control enable

🎀 get_halt_ctrl

get halt control (the little peek 👀)

• vbif — vbif context driver
• xin_id — client interface identifier
• return: halt control enable

💜 set_qos_remap

set QoS priority remap, priorities getting a whole makeover 💅

• vbif — vbif context driver
• xin_id — client interface identifier
• level — priority level
• remap_level — remapped level

🌈 set_mem_type

set memory type, iconic behaviour honestly

• vbif — vbif context driver
• xin_id — client interface identifier
• value — memory type value

🔥 clear_errors

clear any vbif errors 🧹✨ This function clears any detected pending/source errors on the VBIF interface, and optionally returns the detected error mask(s).

• vbif — vbif context driver
• pnd_errors — pointer to pending error reporting variable
• src_errors — pointer to source error reporting variable

lowkey important: those two are pointers, so the errors get reported back out through them — optionally, no cap 🫶

🧚 set_write_gather_en

set write_gather enable 💫

• vbif — vbif context driver
• xin_id — client interface identifier

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🔍 SEE ALSO 🔍

• Kernel file ./drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h

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that's the whole page bestie, go slay 💖

sign-off time: this lil masterpiece lives in ./drivers/gpu/drm/msm/disp/dpu1, dated October 2026, and it's page struct dpu_hw_vbif_ops(9) of the Kernel API Manual 🦋 mwah, periodt ✨🎀