cail_reg_read(9)

💅 cail_reg_read(9) — the Kernel API Manual page you didn't know you needed

okay so bestie, gather round, because we're talking about cail_reg_read(9) from the Kernel API Manual. yes, that's the whole header, consider yourself informed ✨

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🌸 NAME 🌸

cail_reg_read — literally just read an MMIO register, that's the whole vibe 🎀

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✨ SYNOPSIS ✨

uint32_t cail_reg_read (struct card_info *info , uint32_t reg );

that's it. that's the function. she's small but she's iconic 💅

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🦋 ARGUMENTS 🦋

• info — your atom card_info pointer 🫶 like, the card's little ID card
• reg — the MMIO register offset. which register bestie? this one. right here 📍

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💖 DESCRIPTION 💖

okay so here's the tea: this bad boy provides an MMIO register accessor for the atom interpreter (that's r4xx+ for the girls keeping score) 🔥

and what does it do? it returns the value of the MMIO register. that's the whole job. she reads the register and hands you back the value, no cap 👑

lowkey beautiful how simple that is ngl

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🌈 SEE ALSO 🌈

the way this list is long — grab a snack, we're going through all of them 🍓

• Kernel file ./drivers/gpu/drm/radeon/radeon_device.c
• 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_ioreg_write(9)
• cail_ioreg_read(9)
• radeon_atombios_init(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)

like yes ma'am, the whole friend group 💜

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sign-off time, bestie: this little love letter lives in ./drivers/gpu/drm/radeon, dated October 2026, and it's filed under cail_reg_read(9). mwah, go read some registers 💋🌸