wlroots/include/backend/drm/drm.h

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#ifndef BACKEND_DRM_DRM_H
#define BACKEND_DRM_DRM_H
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#include <EGL/egl.h>
#include <gbm.h>
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#include <stdbool.h>
#include <stddef.h>
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#include <stdint.h>
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#include <time.h>
#include <wayland-server-core.h>
#include <wayland-util.h>
#include <wlr/backend/drm.h>
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#include <wlr/backend/session.h>
#include <wlr/render/drm_format_set.h>
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#include <wlr/render/egl.h>
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#include <xf86drmMode.h>
#include "iface.h"
#include "properties.h"
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#include "renderer.h"
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struct wlr_drm_plane {
uint32_t type;
uint32_t id;
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struct wlr_drm_surface surf;
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struct wlr_drm_surface mgpu_surf;
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uint32_t drm_format; // ARGB8888 or XRGB8888
struct wlr_drm_format_set formats;
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// Only used by cursor
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float matrix[9];
bool cursor_enabled;
int32_t cursor_hotspot_x, cursor_hotspot_y;
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union wlr_drm_plane_props props;
};
struct wlr_drm_crtc {
uint32_t id;
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// Atomic modesetting only
uint32_t mode_id;
uint32_t gamma_lut;
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drmModeAtomicReq *atomic;
// Legacy only
drmModeCrtc *legacy_crtc;
struct wlr_drm_plane *primary;
struct wlr_drm_plane *cursor;
/*
* We don't support overlay planes yet, but we keep track of them to
* give to DRM lease clients.
*/
size_t num_overlays;
uint32_t *overlays;
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union wlr_drm_crtc_props props;
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struct wl_list connectors;
uint16_t *gamma_table;
size_t gamma_table_size;
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};
struct wlr_drm_backend {
struct wlr_backend backend;
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struct wlr_drm_backend *parent;
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const struct wlr_drm_interface *iface;
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clockid_t clock;
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bool addfb2_modifiers;
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int fd;
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size_t num_crtcs;
struct wlr_drm_crtc *crtcs;
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struct wl_display *display;
struct wl_event_source *drm_event;
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struct wl_listener display_destroy;
struct wl_listener session_signal;
struct wl_listener drm_invalidated;
struct wl_list outputs;
struct wlr_drm_renderer renderer;
struct wlr_session *session;
};
enum wlr_drm_connector_state {
// Connector is available but no output is plugged in
WLR_DRM_CONN_DISCONNECTED,
// An output just has been plugged in and is waiting for a modeset
WLR_DRM_CONN_NEEDS_MODESET,
WLR_DRM_CONN_CLEANUP,
WLR_DRM_CONN_CONNECTED,
// Connector disappeared, waiting for being destroyed on next page-flip
WLR_DRM_CONN_DISAPPEARED,
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};
struct wlr_drm_mode {
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struct wlr_output_mode wlr_mode;
drmModeModeInfo drm_mode;
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};
struct wlr_drm_connector {
struct wlr_output output;
enum wlr_drm_connector_state state;
struct wlr_output_mode *desired_mode;
backend/drm: steal CRTCs from disabled outputs This commit allows outputs that need a CRTC to steal it from user-disabled outputs. Note that in the case there are enough CRTCs, disabled outputs don't loose it (so there's no modeset and plane initialization needed after DPMS). CRTC allocation still prefers to keep the old configuration, even if that means allocating an extra CRTC to a disabled output. CRTC reallocation now happen when enabling/disabling an output as well as when trying to modeset. When enabling an output without a CRTC, we realloc to try to steal a CRTC from a disabled output (that doesn't really need the CRTC). When disabling an output, we try to give our CRTC to an output that needs one. Modesetting is similar to enabling. A new DRM connector field has been added: `desired_enabled`. Outputs without CRTCs get automatically disabled. This field keeps track of the state desired by the user, allowing to automatically re-enable outputs when a CRTC becomes free. This required some changes to the allocation algorithm. Previously, the algorithm tried to keep the previous configuration even if a new configuration with a better score was possible (it only changed configuration when the old one didn't work anymore). This is now changed and the old configuration (still preferred) is only retained without considering new possibilities when it's perfect (all outputs have CRTCs). User-disabled outputs now have `possible_crtcs` set to 0, meaning they can only retain a previous CRTC (not acquire a new one). The allocation algorithm has been updated to do not bump the score when assigning a CRTC to a disabled output.
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bool desired_enabled;
uint32_t id;
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struct wlr_drm_crtc *crtc;
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uint32_t possible_crtc;
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union wlr_drm_connector_props props;
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uint32_t width, height;
int32_t cursor_x, cursor_y;
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drmModeCrtc *old_crtc;
bool pageflip_pending;
struct wl_event_source *retry_pageflip;
struct wl_list link;
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// DMA-BUF to be displayed on next commit
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struct wlr_dmabuf_attributes pending_dmabuf;
// Buffer submitted to the kernel but not yet displayed
struct wlr_buffer *pending_buffer;
// Buffer currently being displayed
struct wlr_buffer *current_buffer;
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};
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struct wlr_drm_backend *get_drm_backend_from_backend(
struct wlr_backend *wlr_backend);
bool check_drm_features(struct wlr_drm_backend *drm);
bool init_drm_resources(struct wlr_drm_backend *drm);
void finish_drm_resources(struct wlr_drm_backend *drm);
void restore_drm_outputs(struct wlr_drm_backend *drm);
void scan_drm_connectors(struct wlr_drm_backend *state);
int handle_drm_event(int fd, uint32_t mask, void *data);
bool enable_drm_connector(struct wlr_output *output, bool enable);
bool set_drm_connector_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b);
bool drm_connector_set_mode(struct wlr_output *output,
struct wlr_output_mode *mode);
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#endif