4 files changed, 133 insertions, 0 deletions
diff --git a/include/backend/drm/backend.h b/include/backend/drm/backend.h
new file mode 100644
index 00000000..0c725ccb
--- /dev/null
+++ b/include/backend/drm/backend.h
@@ -0,0 +1,34 @@
+#ifndef DRM_BACKEND_H
+#define DRM_BACKEND_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <EGL/egl.h>
+#include <gbm.h>
+#include <libudev.h>
+#include <wayland-server.h>
+
+#include <wlr/session.h>
+#include <wlr/common/list.h>
+#include <wlr/backend/drm.h>
+
+#include "backend.h"
+#include "udev.h"
+#include "event.h"
+#include "drm.h"
+
+struct wlr_backend_state {
+	int fd;
+
+	struct wlr_backend *backend;
+	struct wl_event_source *drm_event;
+
+	uint32_t taken_crtcs;
+	list_t *outputs;
+
+	struct wlr_drm_renderer renderer;
+	struct wlr_session *session;
+	struct wlr_udev udev;
+};
+
+#endif
diff --git a/include/backend/drm/drm.h b/include/backend/drm/drm.h
new file mode 100644
index 00000000..4b42aa68
--- /dev/null
+++ b/include/backend/drm/drm.h
@@ -0,0 +1,58 @@
+#ifndef DRM_H
+#define DRM_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <xf86drmMode.h>
+#include <EGL/egl.h>
+#include <gbm.h>
+
+#include "backend/egl.h"
+#include "backend.h"
+
+struct wlr_drm_renderer {
+	int fd;
+	struct gbm_device *gbm;
+	struct wlr_egl egl;
+};
+
+bool wlr_drm_renderer_init(struct wlr_drm_renderer *renderer, int fd);
+void wlr_drm_renderer_free(struct wlr_drm_renderer *renderer);
+
+enum wlr_drm_output_state {
+	DRM_OUTPUT_DISCONNECTED,
+	DRM_OUTPUT_NEEDS_MODESET,
+	DRM_OUTPUT_CONNECTED,
+};
+
+struct wlr_output_mode_state {
+	struct wlr_wl_output_mode *wlr_mode;
+	drmModeModeInfo mode;
+};
+
+struct wlr_output_state {
+	struct wlr_output *wlr_output;
+	enum wlr_drm_output_state state;
+	uint32_t connector;
+	char name[16];
+
+	uint32_t width;
+	uint32_t height;
+
+	uint32_t crtc;
+	drmModeCrtc *old_crtc;
+
+	struct wlr_drm_renderer *renderer;
+	struct gbm_surface *gbm;
+	EGLSurface *egl;
+
+	bool pageflip_pending;
+	bool cleanup;
+};
+
+void wlr_drm_output_cleanup(struct wlr_output_state *output, bool restore);
+
+void wlr_drm_scan_connectors(struct wlr_backend_state *state);
+int wlr_drm_event(int fd, uint32_t mask, void *data);
+
+#endif
diff --git a/include/backend/drm/udev.h b/include/backend/drm/udev.h
new file mode 100644
index 00000000..99c2c403
--- /dev/null
+++ b/include/backend/drm/udev.h
@@ -0,0 +1,24 @@
+#ifndef UDEV_H
+#define UDEV_H
+
+#include <libudev.h>
+
+#include <wlr/session.h>
+#include <wayland-server.h>
+
+struct wlr_udev {
+	struct udev *udev;
+	struct udev_monitor *mon;
+	char *drm_path;
+
+	struct wl_event_source *event;
+};
+
+struct wlr_drm_backend;
+bool wlr_udev_init(struct wl_display *display, struct wlr_udev *udev);
+void wlr_udev_free(struct wlr_udev *udev);
+int wlr_udev_find_gpu(struct wlr_udev *udev, struct wlr_session *session);
+
+void wlr_udev_event(struct wlr_drm_backend *backend);
+
+#endif
diff --git a/include/backend/egl.h b/include/backend/egl.h
new file mode 100644
index 00000000..8cef36b7
--- /dev/null
+++ b/include/backend/egl.h
@@ -0,0 +1,17 @@
+#ifndef WLR_BACKEND_EGL_H
+#define WLR_BACKEND_EGL_H
+
+#include <EGL/egl.h>
+#include <stdbool.h>
+
+struct wlr_egl {
+	EGLDisplay display;
+	EGLConfig config;
+	EGLContext context;
+};
+
+bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display);
+void wlr_egl_free(struct wlr_egl *egl);
+EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window);
+
+#endif