v4l2_phys_addr_for_input(9)

💅 v4l2_phys_addr_for_input(9) — calculate the PA for an input ✨

okay so bestie, welcome to this page from the Kernel API Manual 🫶 it's all about v4l2_phys_addr_for_input, and yes the name is a mouthful but we're gonna slay it together.

---

🌸 NAME 🌸

v4l2_phys_addr_for_input — calculate the PA for an input 💖

✨ SYNOPSIS ✨

u16 v4l2_phys_addr_for_input (u16 phys_addr , u8 input );

🎀 ARGUMENTS 🎀

• phys_addr — the physical address of the parent 👑
• input — the number of the input port, and it must be between 1 and 15 okay?? no sneaky zero, no 16, periodt 💅

🦋 DESCRIPTION 🦋

so this function calculates a new physical address based on the input port number. it's giving "math but make it media" ✨ for example:

PA = 0.0.0.0 and input = 2 becomes 2.0.0.0

PA = 3.0.0.0 and input = 1 becomes 3.1.0.0

PA = 3.2.1.0 and input = 5 becomes 3.2.1.5

PA = 3.2.1.3 and input = 5 becomes f.f.f.f since it maxed out the depth.

lowkey important: that last one goes full f.f.f.f because it maxed out the depth, no cap 😭

💫 RETURN 💫

the new physical address or CEC_PHYS_ADDR_INVALID 💀 that's it, that's the return.

🌈 SEE ALSO 🌈

• Kernel file ./drivers/media/v4l2-core/v4l2-dv-timings.c 📁
• v4l2_match_dv_timings(9)
• v4l2_num_edid_blocks(9)
• v4l2_get_edid_phys_addr(9)
• v4l2_set_edid_phys_addr(9)
• v4l2_phys_addr_validate(9)

---

okay bye bestie, this cutie page came from ./drivers/media/v4l2-core, dated October 2026, and it's literally the manual for v4l2_phys_addr_for_input(9) — mwah 💋✨