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f0bb53c4ab
Following ideas from [1], snapshot the entire KMS state when the VT is switched away, and restore it when the VT is switched back. > Well the neat trick is that userspace doesn’t need to be able to > understand properties to save and restore them - the actual property > value transport between kernel and userspace is fully generic. That way, even if another DRM master changes a property we don't understand like CTM or HDR_OUTPUT_METADATA, we can switch it back and avoid getting garbage on screen. [1]: https://blog.ffwll.ch/2016/01/vt-switching-with-atomic-modeset.html
31 lines
900 B
C
31 lines
900 B
C
#ifndef BACKEND_DRM_IFACE_H
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#define BACKEND_DRM_IFACE_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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struct wlr_drm_backend;
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struct wlr_drm_connector;
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struct wlr_drm_crtc;
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struct wlr_drm_connector_state;
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// Used to provide atomic or legacy DRM functions
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struct wlr_drm_interface {
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// Commit all pending changes on a CRTC.
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bool (*crtc_commit)(struct wlr_drm_connector *conn,
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const struct wlr_drm_connector_state *state, uint32_t flags,
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bool test_only);
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bool (*snapshot_state)(struct wlr_drm_backend *drm);
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bool (*restore_state)(struct wlr_drm_backend *drm);
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};
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extern const struct wlr_drm_interface atomic_iface;
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extern const struct wlr_drm_interface legacy_iface;
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bool drm_legacy_crtc_set_gamma(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc, size_t size, uint16_t *lut);
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bool legacy_restore_state(struct wlr_drm_backend *drm);
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#endif
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