dm_test_wb_a...dth_mismatch(9)

💅 dm_test_wb_atomic_check_width_mismatch(9) 💅

okay so bestie, welcome to the Kernel API Manual — this page is literally about one tiny but iconic KUnit width-mismatch test, and we’re gonna read it together. no cap. ✨

🌸 NAME 🌸

• dm_test_wb_atomic_check_width_mismatch — Verify rejection when width alone differs. that’s the whole assignment, and she ate. 💅

✨ SYNOPSIS ✨

void dm_test_wb_atomic_check_width_mismatch (struct kunit *test );

🎀 ARGUMENTS 🎀

• test — KUnit test context. yes bestie, that’s the one thing she needs. 🫶

💖 DESCRIPTION 💖

so here’s the tea: when only the framebuffer width differs from the CRTC mode hdisplay, the function should return -EINVAL. that’s the expected rejection, periodt. no extra plot twists. 😭

🦋 SEE ALSO 🦋

the Kernel file is right here, iykyk:

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

and the friend group / extended universe is:

• dm_test_wb_atomic_check_no_job(9)
• dm_test_wb_atomic_check_no_fb(9)
• dm_test_wb_atomic_check_valid(9)
• dm_test_wb_atomic_check_size_mismatch(9)
• dm_test_wb_atomic_check_height_mismatch(9)
• dm_test_wb_atomic_check_invalid_format(9)
• dm_test_wb_get_modes_returns_modes(9)
• dm_test_wb_get_modes_bounded_by_max(9)
• dm_test_wb_connector_init_success(9)
• dm_test_wb_prepare_job_no_fb(9)
• dm_test_wb_cleanup_job_no_fb(9)

sign-off vibe check: source/version footer says ./drivers/gpu/drm/amd/display/..., dated October 2026, and the footer title is dm_test_wb_a...dth_mismatch(9). mwah 💋🎀