drmm_vram_helper_init(9)

💅 drmm_vram_helper_init(9) — like, the Kernel API Manual page, bestie

okay so bestie, welcome to drmm_vram_helper_init(9) from the Kernel API Manual 💖 this one's short and sweet and honestly kind of a slay — it's the function that sets up your device's very own struct drm_vram_mm and then just... handles the cleanup for you. main character energy fr fr 🎀

---

✨ NAME ✨

drmm_vram_helper_init — initializes a device's instance of &struct drm_vram_mm 🦋

---

🌸 SYNOPSIS 🌸

int drmm_vram_helper_init (struct drm_device *dev , uint64_t vram_base ,
       size_t vram_size );

---

🎀 ARGUMENTS 🎀

• dev — the DRM device 💻 like, the whole reason we're here
• vram_base — the base address of the video memory 📍 where it all starts
• vram_size — the size of the video memory, and yes, in bytes 🧮

---

🔥 DESCRIPTION 🔥

So what does it actually do? It creates a brand-new instance of struct drm_vram_mm and stores it in struct drm_device.vram_mm. ✨

And here's the iconic part: the instance is auto-managed, and it gets cleaned up as part of device cleanup. You literally don't have to lift a finger 🫶 the kernel handles it for you, no cap.

⚠️ but listen — if you call this function multiple times, it will generate an error message 😭 so like... once is enough, bestie. don't be extra.

---

🌈 RETURN 🌈

0 on success, or a negative errno code otherwise 💀 (iykyk, the classic)

---

👑 SEE ALSO 👑

go check these out if you're obsessed and want more 🧚:

• Kernel file ./drivers/gpu/drm/drm_gem_vram_helper.c overview(9)
• drm_gem_vram_create(9)
• drm_gem_vram_put(9)
• drm_gem_vram_offset(9)
• drm_gem_vram_vmap(9)
• drm_gem_vram_vunmap(9)
• drm_gem_vram_fill_create_dumb(9)
• drm_gem_vram_object_free(9)
• drm_gem_vram_driver_dumb_create(9)
• drm_gem_vram_plane_helper_prepare_fb(9)
• drm_gem_vram_plane_helper_cleanup_fb(9)
• drm_gem_vram_object_vmap(9)
• drm_gem_vram_object_vunmap(9)
• drm_vram_mm_debugfs_init(9)
• drm_vram_helper_mode_valid(9)

---

💜 okay that's the whole page!! this one lives in ./drivers/gpu/drm, it's from October 2026, and it's part of the Kernel API Manual — mwah, go forth and init your vram, bestie 💅✨🍓