STRUCT VKMS_FRAME_INFO(9)

💅 struct vkms_frame_info(9) — ok bestie, let's talk frames

Hey so this is a page from the Kernel API Manual, and it's all about struct vkms_frame_info — literally the cutest little struct whose whole personality is storing the state of a frame. That's the job. That's the vibe. 🎀

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✨ NAME ✨

struct vkms_frame_info — Structure to store the state of a frame

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🦋 SYNOPSIS 🦋

struct vkms_frame_info {
    struct drm_framebuffer *fb;
    struct drm_rect src, dst;
    struct iosys_map map[DRM_FORMAT_MAX_PLANES];
    unsigned int rotation;
 };

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🌸 Members 🌸

Not me listing every single one because we do NOT skip members in this house 💅

• fb — the backing drm framebuffer. Like, the actual framebuffer behind everything. Iconic.
• src — the source rectangle of this frame, in the source framebuffer, stored in 16.16 fixed-point form. Yes bestie, fixed-point, write that down.
• dst — the destination rectangle in the crtc buffer, stored in whole pixel units (so, no fixed-point shenanigans here, keep it integer).
• map — see drm_shadow_plane_state.data for this one, iykyk 🔥
• rotation — the rotation applied to the source. That's it, that's the whole thing.

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💖 Description 💖

src and dst should have the same size modulo the rotation. That's the rule, periodt. 🌈

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👑 SEE ALSO 👑

Kernel file ./drivers/gpu/drm/vkms/vkms_drv.h — and the whole friend group:

• struct pixel_argb_u16(9)
• pixel_write_t(9)
• enum pixel_read_direction(9)
• pixel_read_line_t(9)
• struct conversion_matrix(9)
• struct vkms_plane_state(9)
• struct vkms_crtc_state(9)
• struct vkms_output(9)
• struct vkms_device(9)
• vkms_create(9)
• vkms_destroy(9)
• vkms_crtc_init(9)
• vkms_output_init(9)
• vkms_plane_init(9)

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🫶 That's the whole page, no cap — nothing cut, nothing merged, nothing invented.

And a lil sign-off for the credits, because we always give credit: this one lives in ./drivers/gpu/drm/vkms, dated October 2026, and it's filed under struct vkms_frame_info(9) in the Kernel API Manual. Slay 💜✨