STRUCT DPU_HW_PINGPONG_OPS(9)

💅 struct dpu_hw_pingpong_ops(9) 💅

okay so this is a page from the Kernel API Manual bestie, and it's literally the whole interface to the pingpong Hw driver functions 🫶 (yes, pingpong, we love a whimsical subsystem). One thing you need to internalize before anything else: the assumption baked into all of this is that these functions will be called after clocks are enabled. That's the vibe check. No clocks, no calls. Periodt.

✨ NAME ✨

struct dpu_hw_pingpong_ops — the interface to the pingpong Hw driver functions, with the assumption being that these functions will be called after clocks are enabled. 🌸

🦋 SYNOPSIS 🦋

struct dpu_hw_pingpong_ops {
    int (*enable_tearcheck)(struct dpu_hw_pingpong *pp, struct dpu_hw_tear_check *cfg);
    int (*disable_tearcheck)(struct dpu_hw_pingpong *pp);
    int (*connect_external_te)(struct dpu_hw_pingpong *pp, bool enable_external_te);
    u32 (*get_line_count)(struct dpu_hw_pingpong *pp);
    void (*disable_autorefresh)(struct dpu_hw_pingpong *pp, uint32_t encoder_id, u16 vdisplay);
    void (*setup_dither)(struct dpu_hw_pingpong *pp, struct dpu_hw_dither_cfg *cfg);
    int (*enable_dsc)(struct dpu_hw_pingpong *pp);
    void (*disable_dsc)(struct dpu_hw_pingpong *pp);
    int (*setup_dsc)(struct dpu_hw_pingpong *pp);
 };

like… look at her. nine function pointers. main character energy fr fr. 👑

🎀 Members 🎀

• enable_tearcheck — turns on vysnc generation (yes that's genuinely how it's spelled in the header, i'm not fixing it 💀), sets up the init value of the read pointer, and programs the tear check cofiguration (again — their spelling, not mine 🫶). it's giving "do three things at once and slay".
• disable_tearcheck — disables the tear check block. bye bestie 👋
• connect_external_te — does a read, modify, write to either set or clear listening to external TE. Return: 1 if TE was originally connected, 0 if not, or -ERROR. so like, she answers back. iconic. ✨
• get_line_count — obtains the current vertical line counter. just tells you the number. lowkey useful, highkey humble. 🔢
• disable_autorefresh — disables autorefresh if enabled. note the little "if" there, she's conditional and she knows it 💅
• setup_dither — sets up the dither matix for the pingpong block. (matix. matrix's chaotic cousin. love that for us 🍓)
• enable_dsc — enable DSC 🔥
• disable_dsc — disable DSC 💀
• setup_dsc — setup DSC ⭐

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
• dpu_hw_dither_cfg(9)
• to_dpu_hw_pingpong(9)

like, go read those too, iykyk 📚

and that's the whole page bestie, no cap. 🧚 this little gem lives at ./drivers/gpu/drm/msm/disp/dpu1, dated October 2026, and it's filed under struct dpu_hw_pingpong_ops(9) — go forth and enable those clocks first, mwah 💖🎀💜