dvb_ca_en50221_read_data(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dvb_ca_en50221_read_data(9) — yes bestie, that's the kernel API manual ✨

okay so real talk, this page lives in the Kernel API Manual and it's all about dvb_ca_en50221_read_data 🫶 — the little function that talks to your EN50221 CAM control interface and pulls a buffer of data out of the CAM. and like… the data can either go into a buffer you hand it, or it just gets auto-added to the slot's rx_buffer 🎀. main character energy honestly.

✨ NAME ✨

dvb_ca_en50221_read_data — this function talks to an EN50221 CAM control interface 💖 it reads a buffer of data from the CAM. the data can either be stored in a supplied buffer, or automatically be added to the slot's rx_buffer. no cap, that's literally it 🌸

⭐ SYNOPSIS ⭐

int dvb_ca_en50221_read_data (struct dvb_ca_private *ca , int slot , u8
*ebuf , int ecount );

look at her go 👑 same signature, character for character, we do not edit the queen's source 💅

🦋 ARGUMENTS 🦋

  • ca — the CA instance. your whole vibe container, iykyk 🧚
  • slot — which slot we're reading from. pick your fave 💜
  • ebuf — if it's non-NULL, the data gets written to this buffer 📥. if it's NULL, the data gets added into the buffering system as a normal fragment instead. so like, you either bring your own bucket or the system holds it for you 🍓
  • ecount — size of ebuf. lowkey ignored if ebuf is NULL 🙈 (yes, truly, it just doesn't care)

🌈 RETURN 🌈

number of bytes read, or < 0 on error 😭 — dramatic but fair, that's the whole contract 💀

🔥 SEE ALSO 🔥

kernel file ./drivers/media/dvb-core/dvb_ca_en50221.c — and the whole bestie squad, in this exact order, present and accounted for 🌸:

periodt. go read them all, they ate 💅✨

ngl, this page is brought to you by ./drivers/media/dvb-core 📁 and it's stamped October 2026 — so she's current, she's iconic, she's timestamped 🎀💖 bye bestie, happy reading 🦋
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