pacpi_discover_modes(9)

okay bestie, welcome to the Kernel API Manual glow-up for pacpi_discover_modes(9) — manual name folded in right at the top so we don’t have to do the boring header-copy thing 💅

✨ NAME ✨

pacpi_discover_modes — filter non ACPI modes

🦋 SYNOPSIS 🦋

unsigned long pacpi_discover_modes (struct ata_port *ap , struct ata_device *adev );

🎀 ARGUMENTS 🎀

• ap — ATA port. literally the port in question, bestie.
• adev — ATA device. the device we’re checking out.

💖 DESCRIPTION 💖

okay so what this does: try the modes available and see which ones the ACPI method will set up sensibly. from this we get a mask of ACPI modes we can use. no cap, that’s the whole vibe check ✨

🌈 SEE ALSO 🌈

Kernel file ./drivers/ata/pata_acpi.c — plus these related besties:

• pacpi_pre_reset(9)
• pacpi_cable_detect(9)
• pacpi_mode_filter(9)
• pacpi_set_piomode(9)
• pacpi_set_dmamode(9)
• pacpi_qc_issue(9)
• pacpi_port_start(9)
• pacpi_init_one(9)

mwah 💋 cute little sign-off: source ./drivers/ata, dated October 2026, and the page is literally pacpi_discover_modes(9). periodt 🎀