dm_test_lp_...et_then_read(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_lp_...et_then_read — Kernel API Manual 🎀

okay bestie, buckle up, because this one's a KUnit test page from the Kernel API Manual and it is literally about making sure a read does the two-step correctly ✨

🌸 NAME 🌸

dm_test_lp_read_i2c_builds_offset_then_read — the test that checks whether read builds the offset message plus the read message, in that order, no cap 🫶

✨ SYNOPSIS ✨

void dm_test_lp_read_i2c_builds_offset_then_read (struct kunit *test );

🦋 ARGUMENTS 🦋

  • test — the KUnit test context 💖 that's it, that's the whole argument

💅 DESCRIPTION 💅

so the vibe check here is simple but iconic: lp_read_i2c has to build two things before it does anything else 🔥

  1. a 1-byte write of the offset 🎀
  2. followed by a size-byte read into the caller's buffer 🧚

and the way that both of those have to land at the same address? that's the whole point, periodt 💯 that's what this test is checking for.

👑 SEE ALSO 👑

Kernel file 💀 ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_hdcp_test.c

and like, the entire friend group of related pages, bestie — all of them, in order, no skipping 🙈

ngl bestie that's a lot of cross-references 💀 but every single one is in there, so you're covered 🫶

and that's the whole page, mwah 💋 this little cutie lives at ./drivers/gpu/drm/amd/display/..., version-dated October 2026, and it's filed under dm_test_lp_...et_then_read(9) — slay, go read the source 🌈⭐

📦 where this page comes from