s3c_fb_update_palette(9)

📦 version 7.3.1, in nixpkgs unstable

✨ s3c_fb_update_palette ✨

okay bestie, welcome to the s3c_fb_update_palette(9) page from the Kernel API Manual 💅 this one's short but she's important — it's all about palette registers on the s3c framebuffer driver, and honestly? it's giving "small function, big responsibility." 🎀

🌸 NAME 🌸

s3c_fb_update_palette — set or schedule a palette update. literally that's her whole job, no cap 💖

🦋 SYNOPSIS 🦋

void s3c_fb_update_palette (struct s3c_fb *sfb , struct s3c_fb_win *win
, unsigned int reg , u32 value );

she returns void, she takes four things, she does not elaborate further. iconic behavior honestly ✨

🎀 ARGUMENTS 🎀

  • sfb — the hardware information. like, all the hardware deets go here 🫶
  • win — the window that's being updated. yes, that window 💅
  • reg — the palette index being changed — which slot we're messing with ⭐
  • value — the computed palette value. the actual color payload 🍓

💜 DESCRIPTION 💜

so here's the vibe: this function changes the value of a palette register, and it's got two whole ways to do it 😭

  1. Directly write to the palette — which lowkey has a catch: this requires the palette RAM to be disconnected from the hardware whilst this is in progress. yes bestie, disconnect first, that's not optional 🙈
  2. Schedule the update for later — the chill, patient option 🧚

and here's the current situation, fr fr: at the moment, since we have no VSYNC interrupt support, we simply set the palette entry directly. that's it, that's the whole story. no scheduling era yet, we're in our direct-write era 👑

ngl this is one of those "works fine, will be fancier later" situations — the code path today is the direct-write one because the VSYNC interrupt support isn't there 💀

🌈 SEE ALSO 🌈

the whole friend group shows up for this one, so let's give them all their moment 💖 the kernel file lives at ./drivers/video/fbdev/s3c-fb.c, and then we've got:

okay that's the page!! mwah 💋 this queen comes to you straight from ./drivers/video/fbdev, dated October 2026, and she's brought to you by the Kernel API Manual — go read the rest of the squad, ily, bye 🫶💖✨

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