STRUCT DRM_TEGRA_OPEN_CHANNEL(9)

💅 struct drm_tegra_open_channel(9) — bestie's guide to the open channel IOCTL

okay so this is straight out of the Kernel API Manual, and it's literally just the struct that carries the parameters for the open channel IOCTL. no cap. let's get into it 🫶

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✨ NAME ✨

struct drm_tegra_open_channel — the parameters for the open channel IOCTL. that's it, that's the whole vibe 🎀

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🌸 SYNOPSIS 🌸

struct drm_tegra_open_channel {
    __u32 client;
    __u32 pad;
    __u64 context;
 };

look at her. three fields. iconic. 👑

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🦋 Members 🦋

• client — the client ID for this channel. that's the whole job, bestie 💜
• pad — structure padding that may be used in the future. and it must be 0. like, not "should", must. the kernel is not playing 🙈
• context — the application context of this channel. the kernel sets this for you upon successful completion of the IOCTL ✨. this context needs to be passed to the DRM_TEGRA_CHANNEL_CLOSE or the DRM_TEGRA_SUBMIT IOCTLs — so like, don't lose it, it's your golden ticket 🎟️

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💫 SEE ALSO 💫

peep the kernel file ./include/uapi/drm/tegra_drm.h — and then the whole friend group of related structs, all of them, in order:

• struct drm_tegra_gem_create(9)
• struct drm_tegra_gem_mmap(9)
• struct drm_tegra_syncpt_read(9)
• struct drm_tegra_syncpt_incr(9)
• struct drm_tegra_syncpt_wait(9)
• struct drm_tegra_close_channel(9)
• struct drm_tegra_get_syncpt(9)
• struct drm_tegra_get_syncpt_base(9)
• struct drm_tegra_syncpt(9)
• struct drm_tegra_cmdbuf(9)
• struct drm_tegra_reloc(9)
• struct drm_tegra_waitchk(9)
• struct drm_tegra_submit(9)
• struct drm_tegra_gem_set_tiling(9)
• struct drm_tegra_gem_get_tiling(9)
• struct drm_tegra_gem_set_flags(9)
• struct drm_tegra_gem_get_flags(9)
• DRM_TEGRA_SUBMIT_RELOC_SECTOR_LAYOUT(9)
• DRM_TEGRA_SUBMIT_CMD_GATHER_UPTR(9)
• DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT(9)
• DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT_RELATIVE(9)

iykyk 🔥 that's the entire squad right there.

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okay that's the whole page, bestie 🌈 — sourced from ./include/uapi/drm, dated October 2026, and it's still struct drm_...open_channel(9) on both ends because consistency is the moment 💅✨🍓