drm_format_info_bpp(9)

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

okay so picture this: you're deep in DRM land, you've got a pixel format info struct in your hands, and you just NEED to know how many bits one single pixel is eating. that's literally this function. it's the bits-per-pixel girlie. no cap. ✨

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🌸 NAME 🌸

drm_format_info_bpp — number of bits per pixel 💖

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✨ SYNOPSIS ✨

unsigned int drm_format_info_bpp (const struct drm_format_info *info ,
       int plane );

like, she takes two things and gives you back an unsigned int. simple. iconic. periodt. 🫶

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🦋 ARGUMENTS 🦋

• info — the pixel format info 🎀 (yes the const struct drm_format_info * one, you already know)
• plane — the plane index 🌈 (which plane we're talking about, bestie)

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💀 RETURN 💀

the actual number of bits per pixel — and lowkey the important part: it depends on the plane index 👑 so don't come for her assuming it's one fixed number, because it's giving "it depends" energy and that's valid.

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👀 SEE ALSO 👀

the kernel file ./drivers/gpu/drm/drm_fourcc.c is where the magic lives, and then the whole friend group:

• drm_mode_legacy_fb_format(9)
• drm_driver_legacy_fb_format(9)
• drm_driver_color_mode_format(9)
• drm_format_info(9)
• drm_get_format_info(9)
• drm_format_info_block_width(9)
• drm_format_info_block_height(9)
• drm_format_info_min_pitch(9)

go read them, iykyk 💅

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ngl there are no options, no env vars, no exit statuses on this one — she's a tiny little helper and she knows it. 🧚

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and that's the whole page, bestie!! this cutie lives in ./drivers/gpu/drm, she's dated October 2026, and she goes by drm_format_info_bpp(9). mwah 💋🍓 see you in the next manpage!! 🦋✨