dc_stream_configure_crc(9)

💖 dc_stream_configure_crc(9) — the kernel API manual, bestie edition 💖

okay so this is a page from the Kernel API Manual, and it's all about dc_stream_configure_crc — aka "please set up CRC capture on this stream for me." Grab a snack, we're getting into it 🍓

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✨ NAME ✨

dc_stream_configure_crc — configure CRC capture for the given stream. that's it, that's the vibe 💅

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🦋 SYNOPSIS 🦋

bool dc_stream_configure_crc (struct dc *dc , struct dc_stream_state
*stream , struct crc_params *crc_window , bool enable , bool continuous
, uint8_t idx , bool reset , enum crc_poly_mode crc_poly_mode );

like, look at that signature. she's long. she's got range. returns a bool, takes a whole friend group of arguments 🔥

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🎀 ARGUMENTS 🎀

• dc — the DC Object. the main character of this whole story 👑
• stream — the stream we're configuring CRC on. the one getting the glow-up ✨
• crc_window — CRC window info, as in the x/y start/end situation 📐
• enable — turn CRC on with true, off with false. simple as 💀
• continuous — if true, capture CRC on every single frame. if not, you get exactly one capture, one and done 🙈
• idx — which CRC engine instance we're capturing on. pick your fighter 🥊
• reset — reset the CRC engine before the configuration. clean slate energy 🧚
• crc_poly_mode — the CRC polynomial mode. it's giving math, it's giving enum crc_poly_mode 🌈

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💜 DESCRIPTION 💜

lowkey the key thing here: by default, the entire frame is used to calculate the CRC. whole frame, no crumbs, no cap 🫶

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⭐ RETURN ⭐

• false — if the stream isn't found, or CRC capture just isn't supported. sad but honest 😭
• true — if the stream has been configured. slay, it worked 💖

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🌸 SEE ALSO 🌸

the whole extended friend group, fr fr — go say hi to all of them:

• Kernel file ./drivers/gpu/drm/amd/display/dc/core/dc.c Overview(9)
• dc_stream_get_last_used_drr_vtotal(9)
• dc_stream_get_crc(9)
• dc_stream_adjust_vmin_vmax(9)
• dc_commit_state_no_check(9)
• dc_commit_streams(9)
• dc_check_state_update(9)
• dc_check_update_surfaces_for_stream(9)
• update_seamless_boot_flags(9)
• update_planes_and_stream_state(9)
• dc_check_address_only_update(9)
• build_dmub_cmd_list(9)
• could_mpcc_tree_change_for_active_pipes(9)
• commit_minimal_transition_state_in_dc_update(9)
• commit_minimal_transition_state(9)
• dc_update_state(9)
• dc_update_planes_and_stream(9)
• dc_enable_dcmode_clk_limit(9)
• dc_is_dmub_outbox_supported(9)
• dc_enable_dmub_notifications(9)
• dc_enable_dmub_outbox(9)
• dc_process_dmub_aux_transfer_async(9)
• dc_process_dmub_set_config_async(9)
• dc_process_dmub_set_mst_slots(9)
• dc_process_dmub_dpia_set_tps_notification(9)
• dc_process_dmub_dpia_hpd_int_enable(9)
• dc_print_dmub_diagnostic_data(9)
• dc_disable_accelerated_mode(9)
• dc_notify_vsync_int_state(9)
• dc_set_edp_power(9)
• dc_get_power_profile_for_dc_state(9)
• dc_get_det_buffer_size_from_state(9)
• dc_get_host_router_index(9)
• should_commit_intermediate_context(9)
• dc_update_probes_prepare(9)
• dc_update_probes_execute(9)

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ngl this page lives at ./drivers/gpu/drm/amd/display/... and it's stamped October 2026 — so yeah, that's the source/version and the date, consider them mentioned 💅

and that's the whole page bestie, you ate that 🫶✨ mwah 💖