dpu_rm_init(9)

💅 dpu_rm_init(9) — like, the whole Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual entry for dpu_rm_init, and honestly? this one is giving setup era. ✨

🎀 NAME

dpu_rm_init — read the hardware catalog and create reservation tracking objects for all the HW blocks. yes, all of them. no skips. 💖

---

🦋 SYNOPSIS

int dpu_rm_init (struct drm_device *dev , struct dpu_rm *rm , const
struct dpu_mdss_cfg *cat , const struct qcom_ubwc_cfg_data *mdss_data ,
void __iomem *mmio );

like, five arguments, one int, let's go 🫶

---

🌸 ARGUMENTS

• dev — the corresponding device, for devres management. it's the main character of the device world, fr fr.
• rm — the DPU Resource Manager handle. this is literally the whole point of the function, so, y'know, treat it with respect. 👑
• cat — pointer to the hardware catalog. as in catalogue, not the animal. sadly.
• mdss_data — pointer to the MDSS / UBWC configuration. iykyk.
• mmio — the mapped register io address of MDP. do not lose it. seriously. 💀

---

⭐ RETURN

0 on success — otherwise -ERROR. that's it, that's the vibe check. 😭

like, it returns 0 when it slays and a negative error when it does not, so please actually check it, bestie. 🙈

---

🌈 SEE ALSO

the kernel file lives at ./drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c — go look at it, it's iconic:

• _dpu_rm_get_lm_peer(9)
• _dpu_rm_check_lm_and_get_connected_blks(9)
• dpu_rm_release(9)
• dpu_rm_reserve(9)
• dpu_rm_reserve_sspp(9)
• dpu_rm_release_all_sspp(9)
• dpu_rm_get_assigned_resources(9)
• dpu_rm_print_state(9)

---

okay that's the whole page, mwah 💋 — this one came from ./drivers/gpu/drm/msm/disp/dpu1, dated October 2026, and that's the tea. no cap, go call dpu_rm_init and hydrate. 🍓🧚💜