drm_hdmi_in...hdr_metadata(9)

💖 drm_hdmi_infoframe_set_hdr_metadata 💖

okay so first things first, bestie: this is a page from the Kernel API Manual (section 9, the kernel API zone), and the function we're obsessing over today is drm_hdmi_infoframe_set_hdr_metadata — yeah, it's a mouthful, we love her anyway 🫶

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✨ NAME ✨

drm_hdmi_infoframe_set_hdr_metadata — literally fills an HDMI DRM infoframe with HDR metadata that came from userspace. that's the whole vibe. no cap 💅

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✨ SYNOPSIS ✨

int drm_hdmi_infoframe_set_hdr_metadata (struct hdmi_drm_infoframe
*frame , const struct drm_connector_state *conn_state );

like, she takes two things and gives you back an int. simple. iconic. 🎀

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✨ ARGUMENTS ✨

• frame — the HDMI DRM infoframe 🌸 this is the thing getting filled up, bestie. she's the canvas.
• conn_state — the connector state, and it's the one containing the HDR metadata 🔥 so this is where the good stuff lives.

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✨ RETURN ✨

• 0 on success 🎉 (slay)
• a negative error code on failure 😭 (not slay, but at least you know)

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✨ SEE ALSO ✨

• Kernel file ./drivers/gpu/drm/display/drm_hdmi_helper.c — that's where she lives, go say hi 🦋
• drm_hdmi_avi_infoframe_colorimetry(9)
• drm_hdmi_avi_infoframe_bars(9)
• drm_hdmi_avi_infoframe_content_type(9)
• drm_hdmi_compute_mode_clock(9)
• drm_hdmi_acr_get_n_cts(9)

like, the whole friend group fr fr 👑

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lowkey a reminder that if it fails you get a negative error code, not some cute little boolean — so check it properly, bestie, don't just assume it worked 🙈

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and that's the page!! mwah 💜 this gem comes to you from ./drivers/gpu/drm/display, dated October 2026 — see you in the next one, bye bestie 💖✨🎀