dm_mst_test_..._native_read(9)

💅 dm_mst_test_..._native_read(9) — Kernel API Manual ✨

okay so bestie, welcome to the dm_mst_test_..._native_read(9) page 💖 this is the kernel API manual, and it's literally about one little KUnit test that checks a native AUX read goes through the DM callback. no cap, it's a whole vibe. let's get into it 🫶

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🌸 NAME 🌸

dm_mst_test_aux_transfer_native_read — a native AUX read, but like… routed through the DM callback. that's the whole assignment 💅

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✨ SYNOPSIS ✨

void dm_mst_test_aux_transfer_native_read (struct kunit *test );

yep, that's it. one function, one argument, returns void. iconic behaviour honestly 👑

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🎀 ARGUMENTS 🎀

• test — the KUnit test context. that's your little test-world passport, she holds the state for the run 🦋

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🔥 DESCRIPTION 🔥

so here's the tea ☕ — the DM AUX transfer callback is supposed to do three things, in order, and this test is basically the vibe check for all three:

1. build a read payload 📝
2. call the DC link service 📞
3. return the number of bytes provided by the fake backend 🔢

and that's it. that's the test. she builds, she calls, she counts. main character energy from start to finish 💅✨

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🌈 SEE ALSO 🌈

the kernel file lives right here, bestie:

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

and here's the whole friend group — every single one of these is a real one, go say hi 💖:

• dm_mst_test_needs_dsc_aux_workaround_match(9)
• dm_mst_test_needs_dsc_aux_workaround_rev12(9)
• dm_mst_test_needs_dsc_aux_workaround_wrong_dev_id(9)
• dm_mst_test_needs_dsc_aux_workaround_wrong_rev(9)
• dm_mst_test_needs_dsc_aux_workaround_low_sink_count(9)
• dm_mst_test_needs_dsc_aux_workaround_zero_sink_count(9)
• dm_mst_test_pbn_divider_null_link(9)
• dm_mst_test_pbn_divider_uses_link_bandwidth(9)
• dm_mst_test_reset_connector_setting(9)
• dm_mst_test_retrieve_downstream_no_aux(9)
• dm_mst_test_retrieve_downstream_present(9)
• dm_mst_test_retrieve_downstream_aux_error(9)
• dm_mst_test_retrieve_branch_no_parent(9)
• dm_mst_test_retrieve_branch_reads_oui(9)
• dm_mst_test_aux_result_success(9)
• dm_mst_test_aux_result_eio(9)
• dm_mst_test_aux_result_ebusy(9)
• dm_mst_test_aux_result_timeout(9)
• dm_mst_test_aux_transfer_native_write(9)
• dm_mst_test_aux_transfer_partial_write(9)
• dm_mst_test_aux_transfer_error_result(9)
• dm_mst_test_aux_transfer_hpd_discon_quirk(9)
• dm_mst_test_aux_transfer_non_ack_reply(9)
• dm_mst_test_fill_payload_flags_native_write(9)
• dm_mst_test_fill_payload_flags_native_read(9)
• dm_mst_test_fill_payload_flags_i2c_read_mot(9)
• dm_mst_test_fill_payload_flags_write_status(9)
• dm_mst_test_msg_ready_mask(9)
• dm_mst_test_select_esi_dpcd_legacy(9)
• dm_mst_test_select_esi_dpcd_esi(9)
• dm_mst_test_sideband_msg_ready_no_ready_bits(9)
• dm_mst_test_sideband_msg_ready_read_error(9)
• dm_mst_test_sideband_msg_ready_without_mst_state(9)
• dm_mst_test_down_rep_msg_ready_wrapper(9)
• dm_mst_test_initialize_dp_connector_edp(9)
• dm_mst_test_initialize_dp_connector_mst(9)
• dm_mst_test_atomic_best_encoder(9)
• dm_mst_test_create_fake_mst_encoders(9)
• dm_mst_test_atomic_check_no_old_crtc(9)
• dm_mst_test_detect_unregistered(9)
• dm_mst_test_fp_guarded_public_stubs(9)

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and that's the page, bestie 💜 source/version vibes come from ./drivers/gpu/drm/amd/display/... and she's dated October 2026 — so yeah, future-coded queen 🌸✨ periodt 🎀