logind: forward Active=true changes for non-DRM backends

Logind sends us a notification whenever the Active attribute of our session
changes. However, due to the way compositor-drm.c relies on the master DRM
device to be synced with the session, we used to delay Active=true
handling until the DRM device was up, too. See:

    commit aedc7732eb
    Author: David Herrmann <dh.herrmann@gmail.com>
    Date:   Sat Nov 30 11:25:45 2013 +0100

        logind: delay wakeup until DRM-device is resumed

However, the other compositor backends do not use DRM, so logind-util will
never get notified about any DRM device. Therefore, we have to forward the
Active=true change immediately.

This commit fixes logind-util to take sync_drm as argument. If it is true,
we do DRM-device synchronisation, otherwise we don't.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=86889
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Tested-by: nerdopolis <bluescreen_avenger@verizon.net>

src/compositor-drm.c

@@ -2774,7 +2774,7 @@ drm_compositor_create(struct wl_display *display,
 
 	/* Check if we run drm-backend using weston-launch */
 	ec->base.launcher = weston_launcher_connect(&ec->base, param->tty,
-						    param->seat_id);
+						    param->seat_id, true);
 	if (ec->base.launcher == NULL) {
 		weston_log("fatal: drm backend should be run "
 			   "using weston-launch binary or as root\n");

src/compositor-fbdev.c

@@ -891,8 +891,9 @@ fbdev_compositor_create(struct wl_display *display, int *argc, char *argv[],
 	compositor->session_listener.notify = session_notify;
 	wl_signal_add(&compositor->base.session_signal,
 		      &compositor->session_listener);
-	compositor->base.launcher =
-		weston_launcher_connect(&compositor->base, param->tty, "seat0");
+	compositor->base.launcher = weston_launcher_connect(&compositor->base,
+							    param->tty, "seat0",
+							    false);
 	if (!compositor->base.launcher) {
 		weston_log("fatal: fbdev backend should be run "
 			   "using weston-launch binary or as root\n");

src/compositor-rpi.c

@@ -480,8 +480,9 @@ rpi_compositor_create(struct wl_display *display, int *argc, char *argv[],
 	compositor->session_listener.notify = session_notify;
 	wl_signal_add(&compositor->base.session_signal,
 		      &compositor ->session_listener);
-	compositor->base.launcher =
-		weston_launcher_connect(&compositor->base, param->tty, "seat0");
+	compositor->base.launcher = weston_launcher_connect(&compositor->base,
+							    param->tty, "seat0",
+							    false);
 	if (!compositor->base.launcher) {
 		weston_log("Failed to initialize tty.\n");
 		goto out_udev;

src/launcher-util.c

@@ -386,7 +386,7 @@ weston_launcher_activate_vt(struct weston_launcher *launcher, int vt)
 
 struct weston_launcher *
 weston_launcher_connect(struct weston_compositor *compositor, int tty,
-			const char *seat_id)
+			const char *seat_id, bool sync_drm)
 {
 	struct weston_launcher *launcher;
 	struct wl_event_loop *loop;
@@ -418,7 +418,7 @@ weston_launcher_connect(struct weston_compositor *compositor, int tty,
 		}
 	} else {
 		r = weston_logind_connect(&launcher->logind, compositor,
-					  seat_id, tty);
+					  seat_id, tty, sync_drm);
 		if (r < 0) {
 			launcher->logind = NULL;
 			if (geteuid() == 0) {

src/launcher-util.h

@@ -31,7 +31,7 @@ struct weston_launcher;
 
 struct weston_launcher *
 weston_launcher_connect(struct weston_compositor *compositor, int tty,
-			const char *seat_id);
+			const char *seat_id, bool sync_drm);
 
 void
 weston_launcher_destroy(struct weston_launcher *launcher);

src/logind-util.c

@@ -51,6 +51,7 @@
 
 struct weston_logind {
 	struct weston_compositor *compositor;
+	bool sync_drm;
 	char *seat;
 	char *sid;
 	unsigned int vtnr;
@@ -315,8 +316,12 @@ get_active_cb(DBusPendingCall *pending, void *data)
 		goto err_unref;
 
 	dbus_message_iter_get_basic(&sub, &b);
-	if (!b)
-		weston_logind_set_active(wl, false);
+
+	/* If the backend requested DRM master-device synchronization, we only
+	 * wake-up the compositor once the master-device is up and running. For
+	 * other backends, we immediately forward the Active-change event. */
+	if (!wl->sync_drm || !b)
+		weston_logind_set_active(wl, b);
 
 err_unref:
 	dbus_message_unref(m);
@@ -490,7 +495,7 @@ device_paused(struct weston_logind *wl, DBusMessage *m)
 	if (!strcmp(type, "pause"))
 		weston_logind_pause_device_complete(wl, major, minor);
 
-	if (major == DRM_MAJOR)
+	if (wl->sync_drm && major == DRM_MAJOR)
 		weston_logind_set_active(wl, false);
 }
 
@@ -516,7 +521,7 @@ device_resumed(struct weston_logind *wl, DBusMessage *m)
 	 * there is no need for us to handle this event for evdev. For DRM, we
 	 * notify the compositor to wake up. */
 
-	if (major == DRM_MAJOR)
+	if (wl->sync_drm && major == DRM_MAJOR)
 		weston_logind_set_active(wl, true);
 }
 
@@ -835,7 +840,7 @@ weston_logind_destroy_vt(struct weston_logind *wl)
 WL_EXPORT int
 weston_logind_connect(struct weston_logind **out,
 		      struct weston_compositor *compositor,
-		      const char *seat_id, int tty)
+		      const char *seat_id, int tty, bool sync_drm)
 {
 	struct weston_logind *wl;
 	struct wl_event_loop *loop;
@@ -849,6 +854,7 @@ weston_logind_connect(struct weston_logind **out,
 	}
 
 	wl->compositor = compositor;
+	wl->sync_drm = sync_drm;
 
 	wl->seat = strdup(seat_id);
 	if (!wl->seat) {

src/logind-util.h

@@ -51,7 +51,7 @@ weston_logind_activate_vt(struct weston_logind *wl, int vt);
 int
 weston_logind_connect(struct weston_logind **out,
 		      struct weston_compositor *compositor,
-		      const char *seat_id, int tty);
+		      const char *seat_id, int tty, bool sync_drm);
 
 void
 weston_logind_destroy(struct weston_logind *wl);
@@ -107,7 +107,7 @@ weston_logind_activate_vt(struct weston_logind *wl, int vt)
 static inline int
 weston_logind_connect(struct weston_logind **out,
 		      struct weston_compositor *compositor,
-		      const char *seat_id, int tty)
+		      const char *seat_id, int tty, bool sync_drm)
 {
 	return -ENOSYS;
 }