drm_of_get_dsi_bus(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_of_get_dsi_bus(9)

okay so bestie, welcome to the Kernel API Manual ✨ — yes we're really out here reading kernel docs and honestly? iconic behavior. this one's about drm_of_get_dsi_bus, and it's lowkey a little matchmaker that finds the DSI bus for a device 🎀

🌸 NAME

drm_of_get_dsi_bus — find the DSI bus for a given device 🦋

✨ SYNOPSIS

struct mipi_dsi_host * drm_of_get_dsi_bus (struct device *dev );

like, it takes a dev and gives you back a struct mipi_dsi_host *. periodt 💅

🫶 ARGUMENTS

  • dev — the parent device of the display (SPI, I2C) 💖

that's it, that's the whole argument list, she's simple and she knows it.

👑 DESCRIPTION

so the whole vibe here: this function gets the parent DSI bus for a DSI device that's being controlled through some other bus — not MIPI-DCS, we're talking SPI, I2C, etc. — and it does it using the Device Tree 🌈.

also, important, no cap: this function assumes that the device's port0 is the DSI input. so like, that's the deal, that's the arrangement, don't come for her about it 🙈

return value tea ☕:

  • returns a pointer to mipi_dsi_host if it's successful ✨
  • -EINVAL if the request is unsupported 💀
  • -EPROBE_DEFER if the DSI host is found but not available (she's there, she's just not ready yet, give her a sec) 😭
  • -ENODEV otherwise 🌸

🧚 SEE ALSO

the whole friend group, fr fr:

ngl, -EPROBE_DEFER is giving "seen at 2am, replied at 3pm" energy and honestly we respect it 🫶

okay that's the whole page bestie, you ate that 💅✨ this one lives at ./drivers/gpu/drm, dated October 2026, and it's filed under drm_of_get_dsi_bus(9) — go forth and slay your Device Tree queries 🔥👑

📦 where this page comes from