backend/drm: remove wlr_drm_crtc_state.active

Replace it with drm_connector_state_active, which figures out
whether the connector is active depending on the wlr_output_state
to be applied.

backend/drm/atomic.c

@@ -55,13 +55,14 @@ static void atomic_add(struct atomic *atom, uint32_t id, uint32_t prop, uint64_t
 }
 
 static bool create_mode_blob(struct wlr_drm_backend *drm,
-		struct wlr_drm_crtc *crtc, uint32_t *blob_id) {
-	if (!crtc->pending.active) {
+		struct wlr_drm_connector *conn, const struct wlr_output_state *state,
+		uint32_t *blob_id) {
+	if (!drm_connector_state_active(conn, state)) {
 		*blob_id = 0;
 		return true;
 	}
 
-	if (drmModeCreatePropertyBlob(drm->fd, &crtc->pending.mode->drm_mode,
+	if (drmModeCreatePropertyBlob(drm->fd, &conn->crtc->pending.mode->drm_mode,
 			sizeof(drmModeModeInfo), blob_id)) {
 		wlr_log_errno(WLR_ERROR, "Unable to create mode property blob");
 		return false;
@@ -170,10 +171,11 @@ static bool atomic_crtc_commit(struct wlr_drm_backend *drm,
 	struct wlr_drm_crtc *crtc = conn->crtc;
 
 	bool modeset = drm_connector_state_is_modeset(state);
+	bool active = drm_connector_state_active(conn, state);
 
 	uint32_t mode_id = crtc->mode_id;
 	if (modeset) {
-		if (!create_mode_blob(drm, crtc, &mode_id)) {
+		if (!create_mode_blob(drm, conn, state, &mode_id)) {
 			return false;
 		}
 	}
@@ -213,16 +215,14 @@ static bool atomic_crtc_commit(struct wlr_drm_backend *drm,
 
 	struct atomic atom;
 	atomic_begin(&atom);
-	atomic_add(&atom, conn->id, conn->props.crtc_id,
-		crtc->pending.active ? crtc->id : 0);
-	if (modeset && crtc->pending.active &&
-			conn->props.link_status != 0) {
+	atomic_add(&atom, conn->id, conn->props.crtc_id, active ? crtc->id : 0);
+	if (modeset && active && conn->props.link_status != 0) {
 		atomic_add(&atom, conn->id, conn->props.link_status,
 			DRM_MODE_LINK_STATUS_GOOD);
 	}
 	atomic_add(&atom, crtc->id, crtc->props.mode_id, mode_id);
-	atomic_add(&atom, crtc->id, crtc->props.active, crtc->pending.active);
-	if (crtc->pending.active) {
+	atomic_add(&atom, crtc->id, crtc->props.active, active);
+	if (active) {
 		if (crtc->props.gamma_lut != 0) {
 			atomic_add(&atom, crtc->id, crtc->props.gamma_lut, gamma_lut);
 		}

backend/drm/drm.c

@@ -363,7 +363,7 @@ static bool drm_crtc_page_flip(struct wlr_drm_connector *conn,
 		return false;
 	}
 
-	assert(crtc->pending.active);
+	assert(drm_connector_state_active(conn, state));
 	assert(plane_get_next_fb(crtc->primary));
 	if (!drm_crtc_commit(conn, state, DRM_MODE_PAGE_FLIP_EVENT)) {
 		return false;
@@ -680,7 +680,6 @@ static bool drm_connector_init_renderer(struct wlr_drm_connector *conn,
 	}
 	struct wlr_drm_plane *plane = crtc->primary;
 
-	crtc->pending.active = true;
 	crtc->pending.mode = mode;
 
 	int width = mode->wlr_mode.width;
@@ -703,7 +702,6 @@ static bool drm_connector_init_renderer(struct wlr_drm_connector *conn,
 			"retrying without modifiers");
 		modifiers = false;
 
-		crtc->pending.active = true;
 		crtc->pending.mode = mode;
 
 		if (!drm_plane_init_surface(plane, drm, width, height, format,
@@ -752,7 +750,6 @@ bool drm_connector_set_mode(struct wlr_drm_connector *conn,
 
 	if (wlr_mode == NULL) {
 		if (conn->crtc != NULL) {
-			conn->crtc->pending.active = false;
 			if (!drm_crtc_commit(conn, state, 0)) {
 				return false;
 			}
@@ -1042,6 +1039,14 @@ bool drm_connector_state_is_modeset(const struct wlr_output_state *state) {
 		(WLR_OUTPUT_STATE_ENABLED | WLR_OUTPUT_STATE_MODE);
 }
 
+bool drm_connector_state_active(struct wlr_drm_connector *conn,
+		const struct wlr_output_state *state) {
+	if (state->committed & WLR_OUTPUT_STATE_ENABLED) {
+		return state->enabled;
+	}
+	return conn->output.enabled;
+}
+
 static const int32_t subpixel_map[] = {
 	[DRM_MODE_SUBPIXEL_UNKNOWN] = WL_OUTPUT_SUBPIXEL_UNKNOWN,
 	[DRM_MODE_SUBPIXEL_HORIZONTAL_RGB] = WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB,
@@ -1060,7 +1065,6 @@ static void dealloc_crtc(struct wlr_drm_connector *conn) {
 	wlr_drm_conn_log(conn, WLR_DEBUG, "De-allocating CRTC %zu",
 		conn->crtc - drm->crtcs);
 
-	conn->crtc->pending.active = false;
 	struct wlr_output_state state = {
 		.committed = WLR_OUTPUT_STATE_ENABLED,
 		.enabled = false,

backend/drm/legacy.c

@@ -15,8 +15,10 @@ static bool legacy_crtc_commit(struct wlr_drm_backend *drm,
 	struct wlr_drm_crtc *crtc = conn->crtc;
 	struct wlr_drm_plane *cursor = crtc->cursor;
 
+	bool active = drm_connector_state_active(conn, state);
+
 	uint32_t fb_id = 0;
-	if (crtc->pending.active) {
+	if (active) {
 		struct wlr_drm_fb *fb = plane_get_next_fb(crtc->primary);
 		if (fb == NULL) {
 			wlr_log(WLR_ERROR, "%s: failed to acquire primary FB",
@@ -30,14 +32,13 @@ static bool legacy_crtc_commit(struct wlr_drm_backend *drm,
 		uint32_t *conns = NULL;
 		size_t conns_len = 0;
 		drmModeModeInfo *mode = NULL;
-		if (crtc->pending.active) {
+		if (active) {
 			conns = &conn->id;
 			conns_len = 1;
 			mode = &crtc->pending.mode->drm_mode;
 		}
 
-		uint32_t dpms = crtc->pending.active ?
-			DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF;
+		uint32_t dpms = active ? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF;
 		if (drmModeConnectorSetProperty(drm->fd, conn->id, conn->props.dpms,
 				dpms) != 0) {
 			wlr_drm_conn_log_errno(conn, WLR_ERROR,

include/backend/drm/drm.h

@@ -42,7 +42,6 @@ struct wlr_drm_plane {
 };
 
 struct wlr_drm_crtc_state {
-	bool active;
 	struct wlr_drm_mode *mode;
 };
 
@@ -160,6 +159,8 @@ size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm,
 struct wlr_drm_fb *plane_get_next_fb(struct wlr_drm_plane *plane);
 
 bool drm_connector_state_is_modeset(const struct wlr_output_state *state);
+bool drm_connector_state_active(struct wlr_drm_connector *conn,
+	const struct wlr_output_state *state);
 
 #define wlr_drm_conn_log(conn, verb, fmt, ...) \
 	wlr_log(verb, "connector %s: " fmt, conn->name, ##__VA_ARGS__)