dcmipp_ent_sd_register(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dcmipp_ent_sd_register(9) — the kernel API manual, but make it make sense

okay so bestie, this one's from the Kernel API Manual and honestly? it's giving "glow-up for your subdev" ✨

🎀 NAME

dcmipp_ent_sd_register — literally initializes and registers a subdev node. both. at once. main character energy 🫶

🌸 SYNOPSIS

int dcmipp_ent_sd_register (struct dcmipp_ent_device *ved , struct
v4l2_subdev *sd , struct v4l2_device *v4l2_dev , const char *const name
, u32 function , u16 num_pads , const unsigned long *pads_flag , const
struct v4l2_subdev_internal_ops *sd_int_ops , const struct
v4l2_subdev_ops *sd_ops , irq_handler_t handler , irq_handler_t
thread_fn );

like yes it's eleven arguments. she's high maintenance and she's worth it 💅

🦋 ARGUMENTS

  • ved — the dcmipp_ent_device struct that's gonna get initialized 🧚
  • sd — the v4l2_subdev struct that gets initialized and registered. two jobs, one queen 👑
  • v4l2_dev — the v4l2 device you register the v4l2_subdev with
  • name — the sub-device's name. ⚠️ heads up bestie: the name must be unique — no cap, this is not a suggestion
  • function — the media entity function, defined by the MEDIA_ENT_F_* macros
  • num_pads — how many pads to initialize, count them carefully 🔢
  • pads_flag — the flags to use in each pad
  • sd_int_ops — pointer to struct v4l2_subdev_internal_ops
  • sd_ops — pointer to struct v4l2_subdev_ops. (yes, with the period, that's how she came out of the box 🙈)
  • handler — the func pointer of the irq handler
  • thread_fn — the func pointer of the threaded irq handler

⭐ DESCRIPTION

So this helper function right? it initializes and registers the struct dcmipp_ent_device and the struct v4l2_subdev — and that v4l2_subdev is the thing that represents a subdev node in the topology 🌈

it does both. one call. obsessed fr fr 💖

🔥 SEE ALSO

and yeah, when you're done with all this, dcmipp_ent_sd_unregister(9) is literally right there waiting. clean up after yourself bestie 🎀

that's the whole page, mwah 💋 — sourced from ./drivers/media/platform/st/st..., dated October 2026, and it's still serving dcmipp_ent_sd_register(9). periodt. 💜

📦 where this page comes from