sstfb_setcolreg(9)

💅 sstfb_setcolreg 💅

Okay so bestie, this one lives in the Kernel API Manual, section 9 — that's the kernel-doc / kernel API corner of the manual-verse, iykyk. And the star of the show is sstfb_setcolreg, which does exactly one iconic thing: it sets a color register. That's it. That's the whole vibe. ✨

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✨ NAME ✨

sstfb_setcolreg — Optional function. Sets a color register. 🎀

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🎀 SYNOPSIS 🎀

int sstfb_setcolreg (u_int regno , u_int red , u_int green , u_int blue
, u_int transp , struct fb_info *info );

Literally copy that exactly, bestie — every u_int, every comma-before-the-newline, all of it. No cap. 🔥

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🦋 ARGUMENTS 🦋

Six arguments, and every single one is doing its little job:

• regno — the hardware colormap register. This is which register we're messing with. 👑
• red — described as the frame buffer colormap structure. Yeah, that's what the page says, don't come for me, I'm just the messenger. 🙈
• green — the green value, which can be up to 16 bits wide. So it's giving chunky. 💚
• blue — the blue value, which can be up to 16 bits wide. Same energy. 💙
• transp — if supported, the alpha value, which can be up to 16 bits wide. Conditional icon. 👀
• info — the frame buffer info structure, aka the whole context bag this thing travels in. 🎒

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🌈 SEE ALSO 🌈

Go be nosy, babe, there's lore in these:

• Kernel file ./drivers/video/fbdev/sstfb.c
• sstfb_check_var(9)
• sstfb_set_par(9)

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Heads up: regno, red, green, blue, transp and info are all written exactly how the page writes them, in exactly that order, and transp only counts if supported — that conditional is load-bearing, don't drop it. 💅

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And that's the page, bestie! 🫶 This little gem ships out of ./drivers/video/fbdev, version stamped October 2026, and it's filed under the name sstfb_setcolreg(9) — so if you ever need to find it again, that's the label. Go set some color registers. Slay. 💖🌸