DRM backend + Session interface + EGL

CMake/FindGBM.cmake

@@ -0,0 +1,39 @@
+#.rst:
+# FindGBM
+# -------
+#
+# Find GBM library
+#
+# Try to find GBM library on UNIX systems. The following values are defined
+#
+# ::
+#
+#   GBM_FOUND         - True if gbm is available
+#   GBM_INCLUDE_DIRS  - Include directories for gbm
+#   GBM_LIBRARIES     - List of libraries for gbm
+#   GBM_DEFINITIONS   - List of definitions for gbm
+#
+#=============================================================================
+# Copyright (c) 2015 Jari Vetoniemi
+#
+# Distributed under the OSI-approved BSD License (the "License");
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+set_package_properties(GBM PROPERTIES
+   URL "http://www.mesa3d.org/"
+   DESCRIPTION "Generic buffer manager")
+
+find_package(PkgConfig)
+pkg_check_modules(PC_GBM QUIET gbm)
+find_library(GBM_LIBRARIES NAMES gbm HINTS ${PC_GBM_LIBRARY_DIRS})
+find_path(GBM_INCLUDE_DIRS gbm.h HINTS ${PC_GBM_INCLUDE_DIRS})
+
+set(GBM_DEFINITIONS ${PC_GBM_CFLAGS_OTHER})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(GBM DEFAULT_MSG GBM_INCLUDE_DIRS GBM_LIBRARIES)
+mark_as_advanced(GBM_INCLUDE_DIRS GBM_LIBRARIES GBM_DEFINITIONS)

CMake/FindSystemd.cmake

@@ -0,0 +1,40 @@
+#.rst:
+# FindSystemd
+# -------
+#
+# Find Systemd library
+#
+# Try to find Systemd library on UNIX systems. The following values are defined
+#
+# ::
+#
+#   SYSTEMD_FOUND         - True if Systemd is available
+#   SYSTEMD_INCLUDE_DIRS  - Include directories for Systemd
+#   SYSTEMD_LIBRARIES     - List of libraries for Systemd
+#   SYSTEMD_DEFINITIONS   - List of definitions for Systemd
+#
+#=============================================================================
+# Copyright (c) 2015 Jari Vetoniemi
+#
+# Distributed under the OSI-approved BSD License (the "License");
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+include(FeatureSummary)
+set_package_properties(Systemd PROPERTIES
+   URL "http://freedesktop.org/wiki/Software/systemd/"
+   DESCRIPTION "System and Service Manager")
+
+find_package(PkgConfig)
+pkg_check_modules(PC_SYSTEMD QUIET libsystemd)
+find_library(SYSTEMD_LIBRARIES NAMES systemd ${PC_SYSTEMD_LIBRARY_DIRS})
+find_path(SYSTEMD_INCLUDE_DIRS systemd/sd-login.h HINTS ${PC_SYSTEMD_INCLUDE_DIRS})
+
+set(SYSTEMD_DEFINITIONS ${PC_SYSTEMD_CFLAGS_OTHER})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SYSTEMD DEFAULT_MSG SYSTEMD_INCLUDE_DIRS SYSTEMD_LIBRARIES)
+mark_as_advanced(SYSTEMD_INCLUDE_DIRS SYSTEMD_LIBRARIES SYSTEMD_DEFINITIONS)

CMakeLists.txt

@@ -48,9 +48,11 @@ find_package(WaylandProtocols REQUIRED)
 find_package(EGL REQUIRED)
 find_package(GLESv2 REQUIRED)
 find_package(DRM REQUIRED)
+find_package(GBM REQUIRED)
 find_package(LibInput REQUIRED)
-find_package(Udev)
+find_package(Udev REQUIRED)
 find_package(Dbus)
+find_package(Systemd REQUIRED)
 
 include(Wayland)
 include(Manpage)

backend/CMakeLists.txt

@@ -1,17 +1,29 @@
 include_directories(
 	${PROTOCOLS_INCLUDE_DIRS}
 	${WAYLAND_INCLUDE_DIR}
+	${DRM_INCLUDE_DIRS}
 )
 
 add_library(wlr-backend
     wayland/backend.c
     wayland/registry.c
     wayland/wl_seat.c
     wayland/wl_output.c
+    drm/backend.c
+    drm/drm.c
+    drm/session.c
+    drm/udev.c
 )
 
 target_link_libraries(wlr-backend
     wlr-common
     wlr-wayland
     ${WAYLAND_LIBRARIES}
+    ${DRM_LIBRARIES}
+    ${GBM_LIBRARIES}
+    ${GLESv2_LIBRARIES}
+    ${EGL_LIBRARIES}
+    ${SYSTEMD_LIBRARIES}
+    ${UDEV_LIBRARIES}
+    ${GBM_LIBRARIES}
 )

backend/drm/backend.c

@@ -0,0 +1,118 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <wlr/common/list.h>
+
+#include "backend/drm/backend.h"
+#include "backend/drm/drm.h"
+#include "backend/drm/session.h"
+#include "backend/drm/udev.h"
+#include "common/log.h"
+
+struct wlr_drm_backend *wlr_drm_backend_init(struct wl_listener *add,
+		struct wl_listener *rem,
+		struct wl_listener *render)
+{
+	struct wlr_drm_backend *backend = calloc(1, sizeof *backend);
+	if (!backend) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		return NULL;
+	}
+
+	backend->displays = list_create();
+	if (!backend->displays) {
+		wlr_log(L_ERROR, "Failed to allocate list");
+		goto error_backend;
+	}
+
+	backend->event_loop = wl_event_loop_create();
+	if (!backend->event_loop) {
+		wlr_log(L_ERROR, "Failed to create event loop");
+		goto error_list;
+	}
+
+	if (!wlr_session_start(&backend->session)) {
+		wlr_log(L_ERROR, "Failed to start session");
+		goto error_loop;
+	}
+
+	if (!wlr_udev_init(backend)) {
+		wlr_log(L_ERROR, "Failed to start udev");
+		goto error_session;
+	}
+
+	backend->fd = wlr_udev_find_gpu(&backend->udev, &backend->session);
+	if (backend->fd == -1) {
+		wlr_log(L_ERROR, "Failed to open DRM device");
+		goto error_udev;
+	}
+
+	if (!wlr_drm_renderer_init(&backend->renderer, backend, backend->fd)) {
+		wlr_log(L_ERROR, "Failed to initialize renderer");
+		goto error_fd;
+	}
+
+	wl_signal_init(&backend->signals.display_add);
+	wl_signal_init(&backend->signals.display_rem);
+	wl_signal_init(&backend->signals.display_render);
+
+	if (add)
+		wl_signal_add(&backend->signals.display_add, add);
+	if (rem)
+		wl_signal_add(&backend->signals.display_rem, rem);
+	if (render)
+		wl_signal_add(&backend->signals.display_render, render);
+
+	wlr_drm_scan_connectors(backend);
+
+	return backend;
+
+error_fd:
+	wlr_session_release_device(&backend->session, backend->fd);
+error_udev:
+	wlr_udev_free(&backend->udev);
+error_session:
+	wlr_session_end(&backend->session);
+error_loop:
+	wl_event_loop_destroy(backend->event_loop);
+error_list:
+	list_free(backend->displays);
+error_backend:
+	free(backend);
+	return NULL;
+}
+
+static void free_display(void *item)
+{
+	struct wlr_drm_display *disp = item;
+	wlr_drm_display_free(disp, true);
+	free(disp);
+}
+
+void wlr_drm_backend_free(struct wlr_drm_backend *backend)
+{
+	if (!backend)
+		return;
+
+	list_foreach(backend->displays, free_display);
+
+	wlr_drm_renderer_free(&backend->renderer);
+	wlr_udev_free(&backend->udev);
+	wlr_session_release_device(&backend->session, backend->fd);
+	wlr_session_end(&backend->session);
+
+	wl_event_source_remove(backend->event_src.drm);
+	wl_event_source_remove(backend->event_src.udev);
+	wl_event_loop_destroy(backend->event_loop);
+
+	list_free(backend->displays);
+	free(backend);
+}
+
+struct wl_event_loop *wlr_drm_backend_get_event_loop(struct wlr_drm_backend *backend)
+{
+	return backend->event_loop;
+}