drm_hdmi_compute_mode_clock(9)

Bestie, welcome to the drm_hdmi_compute_mode_clock(9) page in the Kernel API Manual — it's giving HDMI clock math and I'm obsessed ✨

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🎀 NAME 🎀

drm_hdmi_compute_mode_clock - Computes the TMDS Character Rate 💅

✨ SYNOPSIS ✨

The whole signature, no cap:

unsigned long long drm_hdmi_compute_mode_clock (const struct
drm_display_mode *mode , unsigned int bpc , enum drm_output_color_format
fmt );

🦋 ARGUMENTS 🦋

• mode — Display mode to compute the clock for 🕰️
• bpc — Bits per character 🌟
• fmt — Output Pixel Format used 🌈

💖 DESCRIPTION 💖

Returns the TMDS Character Rate for a given mode, bpc count and output format. Literally that's the whole vibe: mode + bpc + fmt in, TMDS Character Rate out 🎀

🌸 RETURN 🌸

The TMDS Character Rate, in Hertz, or 0 on error. So if it's not clocking, it's giving 0, bestie 😭

🫶 SEE ALSO 🫶

Kernel file: ./drivers/gpu/drm/display/drm_hdmi_helper.c 📁

Also check out these function besties:

• drm_hdmi_infoframe_set_hdr_metadata(9)
• drm_hdmi_avi_infoframe_colorimetry(9)
• drm_hdmi_avi_infoframe_bars(9)
• drm_hdmi_avi_infoframe_content_type(9)
• drm_hdmi_acr_get_n_cts(9)

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Sending hugs from ./drivers/gpu/drm/display, October 2026 — bye bestie! 💖