dm_test_crt...no_connector(9)

💅 dm_test_crt...no_connector(9) — Kernel API Manual energy 🎀

okay so bestie, buckle up, we're in the Kernel API Manual today and this one's a little legend about CRC sources and connectors that don't match. iykyk ✨

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🌸 NAME 🌸

dm_test_crtc_set_crc_source_dprx_no_connector — literally the test for "DPRX but no match" and she ate 💅

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✨ SYNOPSIS ✨

void dm_test_crtc_set_crc_source_dprx_no_connector (struct kunit *test
);

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🦋 ARGUMENTS 🦋

• test — the KUnit test context 🧚 like, the whole vibe-check environment this test runs inside. she's the main character of this signature.

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💖 DESCRIPTION 💖

okay so here's the plot 👑 this test verifies that when you request a DPRX source, the code walks the connector list and returns -EINVAL when no matching DP connector is attached to the CRTC. no connector, no match, no mercy 😭

and the way that it covers both connector filter branches?? iconic. a stateless connector and a writeback connector each exercise one of the two filter branches, so both paths get their moment. periodt 🌈

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🔥 SEE ALSO 🔥

• Kernel file: ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_crc_test.c — the actual source, go read her 📖
• dm_test_crtc_get_crc_sources(9)
• dm_test_crtc_verify_crc_source_valid(9)
• dm_test_crtc_verify_crc_source_invalid(9)
• dm_test_crtc_configure_crc_source_no_stream(9)
• dm_test_crtc_configure_crc_source_dprx(9)
• dm_test_crtc_configure_crc_source_dprx_dither(9)
• dm_test_crtc_configure_crc_source_crtc(9)
• dm_test_crtc_configure_crc_source_crtc_dcn36_poly(9)
• dm_test_crtc_configure_crc_source_crtc_configure_fails(9)
• dm_test_crtc_configure_crc_source_none(9)
• dm_test_crtc_set_crc_source_invalid(9)
• dm_test_crtc_set_crc_source_none_no_stream(9)
• dm_test_crtc_set_crc_source_none_commit(9)
• dm_test_crtc_handle_crc_irq_early_returns(9)
• dm_test_crtc_handle_crc_irq_disabled_source(9)
• dm_test_crtc_handle_crc_irq_skips_initial_frames(9)
• dm_test_crtc_handle_crc_irq_dprx_after_skip(9)
• dm_test_crtc_handle_crc_irq_get_crc_fails(9)
• dm_test_need_dp_aux(9)
• dm_test_crc_source_should_start_dprx(9)
• dm_test_crc_source_should_stop_dprx(9)

that's the whole friend group fr fr 🫶

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and that's the page bestie!! 🍓 source vibes: ./drivers/gpu/drm/amd/display/... and she was dated October 2026 — mark your calendars, this test is from the future 💀💜 slay!!