dm_test_poll...turns_cached(9)

📦 version 7.3.1, in nixpkgs unstable

💅 NAME 💅

okay bestie, welcome to the manual page for dm_test_poll...turns_cached(9) — yes, that is literally the title, no cap. The actual function here is dm_test_poll_dac_load_returns_cached, and it tests the DAC load detection shortcut. Iconic behavior, honestly.

✨ SYNOPSIS ✨

void dm_test_poll_dac_load_returns_cached (struct kunit *test );

🧪 ARGUMENTS 🧪

  • test — the KUnit test context. That's the whole argument, bestie. One (1) singular test context, serving looks.

🌸 DESCRIPTION 🌸

okay so picture this: the previous connection was already established by analog DAC load detection, and polling is not forced. In that case? The connector is not re-detected, and its cached status is returned unchanged. Literally untouched. The vibe check passes, the cache stays winning.

The connector is embedded in an amdgpu_device so that drm_to_adev resolves. That's the setup, that's the lore, that's the whole situation. 🫶

🌈 the kernel file (start here bestie)

  • ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_connector_test.c

like, that's the actual file the whole page is about — everything under it is the family tree 💅

🧚 subconnector + content type squad

🎀 colour depth adjusting (the clock math girlies)

🦋 output color space (so many, and honestly iconic for it)

💜 color depth from info + bpc conversions

🫶 connector type mapping era

🌸 duplicate modes, crtc masks, aspect ratios

🎀 crtc timing copy + decide

⭐ funcs reset, atomic dup state, hdr

💅 set_property (putting values in)

💅 get_property (getting them back out)

🔥 refresh rates + freesync video mode

🧚 cacp caps, round one

🍓 panel type detective work, round one

🦋 subconnector updating, fbc init, mst detect

👑 finding the first crtc

🌸 panel type detective work, round two

🧚 cacp caps, round two

💖 fill_stream (she fills streams, that's the whole thing)

🌈 create_stream

🔍 detect

🎀 register / unregister / destroy / atomic check / cec

🦋 edid handling + validation + encoders + native modes

✨ common modes + ddc + freesync modes

🧚 i2c + amd vsdb + displayid vrr

🍓 mode valid + cec + s3 suspend/resume

💜 the final boss: update_* and scaling

bestie real talk: that's genuinely every single one, no skips, no "etc." notes, i checked twice 😭 if a name isn't here i promise it wasn't in the original either 💖

okay and like, that's the whole page!! you made it to the end, proud of you fr fr 🫶 the source is ./drivers/gpu/drm/amd/display/..., it's dated October 2026, and the whole thing is filed under the dm_test_poll...turns_cached(9) header — go be the main character of your own connector tests, periodt ✨🌸

📦 where this page comes from