dm_test_set_...ps_null_link(9)

💅 dm_test_set_psr_caps_null_link — from the Kernel API Manual, bestie ✨

okay so real talk, this is a page straight out of the Kernel API Manual, and it's a whole mood. the function name in the header gets a lil truncated on the page title — dm_test_set_...ps_null_link — but the actual name? iconic and fully spelled out below. 🎀

---

🌸 NAME 🌸

dm_test_set_psr_caps_null_link — literally just: a NULL link gets rejected. that's it. that's the whole vibe check. no cap. 💅

---

✨ SYNOPSIS ✨

void dm_test_set_psr_caps_null_link (struct kunit *test );

bestie it returns void and takes exactly one thing. we love a low-maintenance signature. 🫶

---

🦋 ARGUMENTS 🦋

• test — the KUnit test context. yeah, that's the whole argument list. she's a one-arg queen. 👑

---

🌈 SEE ALSO 🌈

omg okay this list is LONG so buckle up, we're going down the whole friend group 🍨:

the link_supports_psrsu girlies:

• dm_test_link_supports_psrsu_no_dmcub(9)
• dm_test_link_supports_psrsu_old_dcn(9)
• dm_test_link_supports_psrsu_panel_unsupported(9)
• dm_test_link_supports_psrsu_missing_alpm(9)
• dm_test_link_supports_psrsu_missing_y_coordinate(9)
• dm_test_link_supports_psrsu_missing_granularity(9)
• dm_test_link_supports_psrsu_debug_mask_disabled(9)
• dm_test_link_supports_psrsu_temporarily_disabled(9)

the set_psr_caps squad (our girl is in here, hi bestie):

• dm_test_set_psr_caps_null_connector(9)
• dm_test_set_psr_caps_no_dmub_psr(9)
• dm_test_set_psr_caps_non_edp(9)
• dm_test_set_psr_caps_disconnected(9)
• dm_test_set_psr_caps_no_dpcd_psr(9)
• dm_test_set_psr_caps_edp1_disabled(9)
• dm_test_set_psr_caps_success_psr1(9)

the psr_set_event trio, main character energy each:

• dm_test_psr_set_event_get_event_fails(9)
• dm_test_psr_set_event_already_set(9)
• dm_test_psr_set_event_updates_event(9)

and the psr_is_active_allowed crew closing us out:

• dm_test_psr_is_active_allowed_no_streams(9)
• dm_test_psr_is_active_allowed_null_link(9)
• dm_test_psr_is_active_allowed_requires_enabled_and_allowed(9)
• dm_test_psr_is_active_allowed_any_stream(9)

---

📁 Kernel file 📁

if you wanna go touch grass (er, source) the actual file lives right here:

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

---

ngl this one is lowkey just "does it reject a NULL link? yes? slay" and honestly sometimes that's all a test needs to be 💀

---

okay that's the tea 🍓 — this page came from the file path ./drivers/gpu/drm/amd/display/..., dated October 2026, and it was brought to you by the dm_test_set_...ps_null_link(9) header energy. thanks for coming to my ted talk, mwah 🎀💖✨