dm_test_ori...ze_rotate_90(9)

💅 dm_test_ori...ze_rotate_90(9) — bestie's guide to the Kernel API Manual

okay so real talk, this is a page from the Kernel API Manual, section 9, and it's about a function called dm_test_oriented_plane_size_rotate_90. yes the header truncates it with the ... — that's the manpage being dramatic, not me. the full name is right there in NAME, we get to it in a sec 🫶

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✨ NAME ✨

dm_test_oriented_plane_size_rotate_90 — literally what it says on the tin: Test Oriented plane size rotate 90. that's the whole vibe. a test, for oriented plane size, rotating by 90. slay 💅

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🌸 SYNOPSIS 🌸

void dm_test_oriented_plane_size_rotate_90 (struct kunit *test );

so it returns void (nothing back, it's giving "the journey was the friends we made along the way") and it takes exactly one thing: a struct kunit * named test. no cap, that's it 🎀

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👑 ARGUMENTS 👑

• test — The KUnit test context. this is the little test harness bubble the function lives inside, it's basically the group chat the test is posted in 💖 it's a struct kunit *, so it's a pointer, so treat it nice.

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🦋 SEE ALSO 🦋

first up, the Kernel file this bad boy lives in, and yes i'm copying the path exactly because it is iconic and also i would never disrespect a file path:

./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_cursor_test.c

and then the whole friend group, all section 9, all absolutely valid:

• dm_test_should_update_native_cursor_without_crtc(9)
• dm_test_should_update_native_cursor_disable_native(9)
• dm_test_should_update_native_cursor_enable_overlay(9)
• dm_test_oriented_plane_size_rotate_0(9)
• dm_test_oriented_plane_size_rotate_180(9)
• dm_test_oriented_plane_size_rotate_270(9)
• dm_test_get_plane_scale_identity(9)
• dm_test_get_plane_scale_rotate_90_identity(9)
• dm_test_get_plane_scale_zero_src_width(9)

notice how rotate 0, 180 and 270 are all here but 90 is us, we are the main character of this rotation arc 🔥 go say hi to your siblings bestie, they're all in the same file, it's a whole family reunion 😭

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ngl the original page is short and i respect that — it said what it needed to say, hit send, and logged off. no warnings, no caveats, no deprecated anything to scream about. we love a low-drama manpage 🌈

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sign-off 🎀✨

this little love letter comes to you from ./drivers/gpu/drm/amd/display/... (the truncation is canon, i don't make the rules) and it's dated October 2026 — future-coded of it honestly. the header up top said dm_test_ori...ze_rotate_90(9) and the footer said the same thing, and now you know the whole story. bye bestie, go rotate something 90 degrees 💜🦋🌸