STRUCT DPU_ENCODER_PHYS_WB(9)

💖 struct dpu_encoder_phys_wb(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes, the Kernel API Manual, and today's main character is struct dpu_encoder_phys_wb. sit down, hydrate, and let's get into it 🫶

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✨ NAME ✨

struct dpu_encoder_phys_wb — a sub-class of dpu_encoder_phys that literally exists to handle command mode specific operations. it's giving "specialized child struct" energy 👑

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🌸 SYNOPSIS 🌸

struct dpu_encoder_phys_wb {
    struct dpu_encoder_phys base;
    atomic_t wbirq_refcount;
    int wb_done_timeout_cnt;
    struct dpu_hw_wb_cfg wb_cfg;
    struct drm_writeback_connector *wb_conn;
    struct drm_writeback_job *wb_job;
    struct dpu_hw_fmt_layout dest;
};

no cap, that's the whole shape of her 💅

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🎀 Members 🎀

• base — the baseclass physical encoder structure. she inherited it from her mother dpu_encoder_phys, iconic lineage fr 💜
• wbirq_refcount — reference count of writeback interrupt. an atomic_t, so she's thread-safe and unbothered ✨
• wb_done_timeout_cnt — the number of wb done irq timeout errors. a little counter of sadness 😭 every time writeback doesn't finish in time, this goes up
• wb_cfg — the writeback block config, used to store fb related details. the struct dpu_hw_wb_cfg holding the receipts 🧾
• wb_conn — backpointer to the writeback connector (struct drm_writeback_connector *). she knows where she came from 🦋
• wb_job — backpointer to the current writeback job (struct drm_writeback_job *). note "current" — the job in flight right now, main character energy only 🔥
• dest — the struct dpu_hw_fmt_layout dpu buffer layout for the current writeback output buffer. where the pixels are actually going 📦

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🌈 SEE ALSO 🌈

peep these, iykyk 👀

• Kernel file ./drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
• enum dpu_enc_split_role(9)
• enum dpu_enc_enable_state(9)
• struct dpu_encoder_phys_ops(9)
• enum dpu_intr_idx(9)
• struct dpu_encoder_phys(9)
• struct dpu_encoder_phys_cmd(9)
• struct dpu_enc_phys_init_params(9)

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💀 reminder bestie: this is a kernel API doc — the signatures, types, and names above are literal. copy them exactly, don't get creative with the C, only with the vibes.

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and that's the whole page, periodt 🎀 so anyway — this little love letter lives in ./drivers/gpu/drm/msm/disp/dpu1, dated October 2026, and it's filed under struct dpu_encoder_phys_wb(9). go read the header file, slay, bye bestie 💖✨🦋