dm_test_lin..._granularity(9)

💅 dm_test_lin..._granularity(9) — like, the whole NAME thing first

okay bestie so this page lives in the Kernel API Manual, and the function's full government name is dm_test_link_supports_psrsu_missing_granularity — yes the header abbreviates it to dm_test_lin..._granularity(9) because apparently even kernel docs get tired mid-word 😭

🌸 NAME 🌸

dm_test_link_supports_psrsu_missing_granularity — the required granularity has got to be reported by the panel. Like, it's not optional, it's giving mandatory. no cap 💅

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✨ SYNOPSIS ✨

void dm_test_link_supports_psrsu_missing_granularity (struct kunit *test
);

that's it, that's the whole vibe — one void function, one arg, zero drama 🎀

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🦋 ARGUMENTS 🦋

• test — the KUnit test context. the lil backstage pass for the test, basically. main character energy for your test harness 👑

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🔥 SEE ALSO 🔥

so here's the thing, bestie — this function does not roll alone. it's part of a whole friend group, and honestly? the group chat is huge. let's meet everyone 🫶

first up, the kernel file where all this lives:

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

then the psrsu link-support besties:

• 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_debug_mask_disabled(9)
• dm_test_link_supports_psrsu_temporarily_disabled(9)

the set_psr_caps squad, all lining up:

• dm_test_set_psr_caps_null_link(9)
• 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 girlies:

• 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 out the list:

• 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)

like I said. huge friend group. every single one is invited to the function party 🎉

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lowkey a reminder that this is a kernel API page, so it's all (9) section energy — not your regular userland command, okay? iykyk 🌈

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and that's the whole page, bestie! this icon was brought to you by the Kernel API Manual, sourced from ./drivers/gpu/drm/amd/display/..., dated October 2026. go forth and report your granularity 💖✨🍓