of_get_fb_videomode(9)

✨ NAME ✨

of_get_fb_videomode — get a fb_videomode from devicetree 💖

okay bestie, welcome to the Kernel API Manual — this one is short but lowkey important, and it's all about pulling a video mode out of devicetree. slay.

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🌸 SYNOPSIS 🌸

int of_get_fb_videomode (struct device_node *np , struct fb_videomode
       *fb , int index );

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🎀 ARGUMENTS 🎀

• np — the device_node with the timing specification, iykyk. it's the devicetree node you're getting the timing info from.
• fb — will be set to the return value. yes, that's literally the whole job. 🫶
• index — the index into the list of display timings in devicetree. pick your mode, bestie.

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🦋 DESCRIPTION 🦋

so this function is expensive 😭 — not like "oops my coffee was $9" expensive, but like "don't call it in a loop for no reason" expensive. only use it if only one mode is to be read from DT. one. single. mode. periodt.

if you need multiple modes, start with of_get_display_timings ond work with that instead. yep, that's the vibe — use the bigger tool for the bigger job. 💅

🚨 reminder bestie: this function is expensive and should only be used if only one mode is to be read from DT. for multiple modes, start with of_get_display_timings ond work with that instead. no cap.

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👀 SEE ALSO 👀

• Kernel file ./drivers/video/fbdev/core/fbmon.c
• fb_create_modedb(9)
• fb_destroy_modedb(9)
• fb_get_vblank(9)
• fb_get_hblank_by_hfreq(9)
• fb_get_hblank_by_dclk(9)
• fb_get_hfreq(9)

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mwah 💋 this lil page lives under ./drivers/video/fbdev/core, is dated October 2026, and it's the of_get_fb_videomode(9) page. iconic. 🎀✨