cdns_csi2rx_negotiate_ppc(9)

💅 cdns_csi2rx_negotiate_ppc(9) — from the Kernel API Manual, bestie

okay so picture this: you're deep in the kernel, the Cadence CSI2RX situation is happening, and somebody needs to negotiate. No cap, that's literally the whole gig of cdns_csi2rx_negotiate_ppc — it handles the pixel-per-clock negotiation on the output interface. It's giving diplomat energy fr fr. 🫶

✨ SYNOPSIS ✨

int cdns_csi2rx_negotiate_ppc (struct v4l2_subdev *subdev , unsigned int pad , u8 *ppc );

🎀 ARGUMENTS 🎀

• subdev — points to a struct v4l2_subdev. bestie, this is the subdevice we're working with, that's the whole vibe 💅
• pad — the pad number of the source pad. gotta know which pad we're talking about, obviously 🔥
• ppc — a pointer to the requested pixel-per-clock value. yes, it's a pointer, and yes, it's u8 * — she's tiny but she matters 🌸

🦋 DESCRIPTION 🦋

So what does it actually do? It returns 0 on success, and a negative error code otherwise. That's it. That's the tea. 🍓

Like, no dramatic monologue, no side quests — success is 0, anything else is a negative error code and you should probably pay attention to it. 😭

okay but seriously — always check the return value. a negative error code is the kernel telling you something went wrong, and ignoring it is not the main character move you think it is 🙈

👑 SEE ALSO 👑

• Kernel file ./include/media/cadence/cdns-csi2rx.h — go read it, iykyk ✨

and that's the whole page, bestie!! 🌈 this little icon comes straight out of ./include/media/cadence — Kernel API Manual, dated October 2026 — so go forth and negotiate those pixels per clock, you absolute legend 💖🧚⭐