ENUM IRIS_INST_SUB_STATE(9)

💅 enum iris_inst_sub_state(9)

okay bestie, welcome to the enum iris_inst_sub_state(9) page — yes that's the title, yes it's from the Kernel API Manual, and yes we're gonna get through it together 🫶

This is one of those little header-file enums from the Qualcomm iris driver, and it's basically a mood ring for a media instance: each value is a sub-state, like a tiny status update the instance posts so everyone knows what phase of life it's in ✨

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🌸 NAME

enum iris_inst_sub_state — and like… that's it. The description after the dash is literally empty in the original. No cap, blank. So the name is the whole name and we move on 💀

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🎀 SYNOPSIS

enum iris_inst_sub_state {
    IRIS_INST_SUB_FIRST_IPSC ,
    IRIS_INST_SUB_DRC ,
    IRIS_INST_SUB_DRC_LAST ,
    IRIS_INST_SUB_DRAIN ,
    IRIS_INST_SUB_DRAIN_LAST ,
    IRIS_INST_SUB_INPUT_PAUSE ,
    IRIS_INST_SUB_OUTPUT_PAUSE ,
    IRIS_INST_SUB_LOAD_RESOURCES

};

look at her go, eight members, all caps, all iconic 👑

⭐ Constants

• IRIS_INST_SUB_FIRST_IPSC — firmware hit us with a source change while the output port isn't streaming yet. early days, nothing's flowing, but the plot is already thickening 🦋
• IRIS_INST_SUB_DRC — a source change came in from firmware while the output port is streaming, and the source change event got sent off to the client. we're live and something changed, bestie 🔥
• IRIS_INST_SUB_DRC_LAST — the final buffer of a source change just landed from firmware. last one out, doors closing 💅
• IRIS_INST_SUB_DRAIN — drain is in progress. the instance is emptying out its buffers, no big drama, just vibes 🌈
• IRIS_INST_SUB_DRAIN_LAST — the last buffer of the drain sequence arrived from firmware. drain era: complete ✨
• IRIS_INST_SUB_INPUT_PAUSE — a source change was received from firmware, and this one means firmware is paused and won't process any further input frames. input is on read-receipt mode 🙈
• IRIS_INST_SUB_OUTPUT_PAUSE — the last buffer of the drc sequence came in from firmware, and this means firmware is paused from processing any further output frames. output said "brb" 😭
• IRIS_INST_SUB_LOAD_RESOURCES — everything's loaded! firmware has all the resources it needs and is ready to actually process stuff. main character energy, fully equipped 👑

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🦋 SEE ALSO

• Kernel file ./drivers/media/platform/qcom/iris/iris_state.h enum
• iris_core_state(9)
• enum iris_inst_state(9)

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heads up bestie: IRIS_INST_SUB_INPUT_PAUSE and IRIS_INST_SUB_OUTPUT_PAUSE are the pause-y ones — input frames vs output frames — so don't mix them up when you're reading the state machine 👀

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and that's the whole page, periodt 🎀💜 this cutie came from ./drivers/media/platform/qcom/... with an October 2026 date stamp, filed under enum iris_inst_sub_state(9) — mwah, go read iris_state.h and slay 💖