radeon_atombios_init(9)

💖 radeon_atombios_init(9) — the glow-up edition 💖

okay so bestie, this is a page out of the Kernel API Manual, and the star of the show is literally radeon_atombios_init 🎀. It's giving "driver setup era" and honestly? iconic.

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✨ NAME ✨

radeon_atombios_init — init the driver info and callbacks for atombios 👑

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🌸 SYNOPSIS 🌸

int radeon_atombios_init (struct radeon_device *rdev );

that's the whole vibe. one function, one pointer, zero drama 💅

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🦋 ARGUMENTS 🦋

• rdev — a radeon_device pointer, aka the main character of this whole operation 🫶

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🔥 DESCRIPTION 🔥

So what does it actually do? It initializes the driver info and the register access callbacks for the ATOM interpreter — and yes, that's the r4xx+ crowd, no cap 💀✨

It returns 0 on sucess (that spelling is the manpage's, not mine, and I'm obsessed with it 😭) and -ENOMEM on failure, so if you see that one you know memory said "not today" 🙈

When does it run? At driver startup, bestie. Just driver startup. That's the moment. main character energy fr fr ⭐

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🌈 SEE ALSO 🌈

First up, the kernel file it lives in, so you can go read the source like the little scholar you are 🧚:

• Kernel file ./drivers/gpu/drm/radeon/radeon_device.c

and then the whole friend group — every single one, no skipping 🎀:

• radeon_program_register_sequence(9), radeon_surface_init(9), radeon_scratch_init(9), radeon_scratch_get(9), radeon_scratch_free(9), radeon_doorbell_init(9), radeon_doorbell_fini(9), radeon_doorbell_get(9), radeon_doorbell_free(9), radeon_wb_disable(9), radeon_wb_fini(9), radeon_wb_init(9), radeon_vram_location(9), radeon_gtt_location(9), radeon_card_posted(9), radeon_update_bandwidth_info(9), radeon_boot_test_post_card(9), radeon_dummy_page_init(9), radeon_dummy_page_fini(9), cail_pll_read(9), cail_pll_write(9), cail_mc_read(9), cail_mc_write(9), cail_reg_write(9), cail_reg_read(9), cail_ioreg_write(9), cail_ioreg_read(9), radeon_atombios_fini(9), radeon_combios_init(9), radeon_combios_fini(9), radeon_vga_set_decode(9), radeon_gart_size_auto(9), radeon_check_arguments(9), radeon_switcheroo_set_state(9), radeon_switcheroo_can_switch(9), radeon_device_init(9), radeon_device_fini(9), radeon_gpu_reset(9)

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lowkey a whole syllabus of cross-references and I ate every single one 🍓

okay that's the page!! mwah 💜 this one came from ./drivers/gpu/drm/radeon and it's dated October 2026, so write that down in your notes bestie, and go slay your driver init 🎀✨🫶