backend/drm: remove crtc_set_cursor from interface

backend/drm/atomic.c

@@ -237,15 +237,6 @@ static bool atomic_crtc_commit(struct wlr_drm_backend *drm,
 		return false;
 	}
 
-	if (crtc->active && crtc->cursor) {
-		drm_fb_move(&crtc->cursor->queued_fb, &crtc->cursor->pending_fb);
-	}
-	return true;
-}
-
-static bool atomic_crtc_set_cursor(struct wlr_drm_backend *drm,
-		struct wlr_drm_crtc *crtc, struct gbm_bo *bo) {
-	/* Cursor updates happen when we pageflip */
 	return true;
 }
 
@@ -267,6 +258,5 @@ static size_t atomic_crtc_get_gamma_size(struct wlr_drm_backend *drm,
 
 const struct wlr_drm_interface atomic_iface = {
 	.crtc_commit = atomic_crtc_commit,
-	.crtc_set_cursor = atomic_crtc_set_cursor,
 	.crtc_get_gamma_size = atomic_crtc_get_gamma_size,
 };

backend/drm/backend.c

@@ -100,19 +100,6 @@ static void session_signal(struct wl_listener *listener, void *data) {
 			} else {
 				enable_drm_connector(&conn->output, false);
 			}
-
-			if (!conn->crtc) {
-				continue;
-			}
-
-			struct wlr_drm_plane *plane = conn->crtc->cursor;
-			struct gbm_bo *bo = NULL;
-			if (plane->cursor_enabled) {
-				bo = drm_fb_acquire(&plane->current_fb, drm,
-					&plane->mgpu_surf);
-			}
-
-			drm->iface->crtc_set_cursor(drm, conn->crtc, bo);
 		}
 	} else {
 		wlr_log(WLR_INFO, "DRM fd paused");

backend/drm/drm.c

@@ -360,6 +360,7 @@ static bool drm_crtc_page_flip(struct wlr_drm_connector *conn) {
 
 	conn->pageflip_pending = true;
 	drm_fb_move(&crtc->primary->queued_fb, &crtc->primary->pending_fb);
+	drm_fb_move(&crtc->cursor->queued_fb, &crtc->cursor->pending_fb);
 	wlr_output_update_enabled(&conn->output, true);
 	return true;
 }
@@ -1013,17 +1014,7 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
 		plane->cursor_enabled = true;
 	}
 
-	if (!drm->session->active) {
-		return true; // will be committed when session is resumed
-	}
-
-	struct gbm_bo *bo = NULL;
-
 	if (plane->cursor_enabled) {
-		bo = drm_fb_acquire(&plane->pending_fb, drm, &plane->mgpu_surf);
-
-		wlr_log(WLR_DEBUG, "SET_CURSOR %p %p", plane->pending_fb.bo, bo);
-
 		/* Workaround for nouveau buffers created with GBM_BO_USER_LINEAR are
 		 * placed in NOUVEAU_GEM_DOMAIN_GART. When the bo is attached to the
 		 * cursor plane it is moved to NOUVEAU_GEM_DOMAIN_VRAM. However, this
@@ -1035,10 +1026,6 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
 		glFinish();
 	}
 
-	if (!drm->iface->crtc_set_cursor(drm, crtc, bo)) {
-		return false;
-	}
-
 	wlr_output_update_needs_frame(output);
 	return true;
 }

backend/drm/legacy.c

@@ -56,10 +56,36 @@ static bool legacy_crtc_commit(struct wlr_drm_backend *drm,
 		}
 	}
 
-	if (cursor != NULL && cursor->cursor_enabled && drmModeMoveCursor(drm->fd,
+	if (cursor != NULL && cursor->cursor_enabled) {
+		struct wlr_drm_fb *cursor_fb = plane_get_next_fb(cursor);
+		struct gbm_bo *cursor_bo =
+			drm_fb_acquire(cursor_fb, drm, &cursor->mgpu_surf);
+		if (!cursor_bo) {
+			wlr_log_errno(WLR_DEBUG, "%s: failed to acquire cursor FB",
+				conn->output.name);
+			return false;
+		}
+
+		if (drmModeSetCursor(drm->fd, crtc->id,
+				gbm_bo_get_handle(cursor_bo).u32,
+				cursor->surf.width, cursor->surf.height)) {
+			wlr_log_errno(WLR_DEBUG, "%s: failed to set hardware cursor",
+				conn->output.name);
+			return false;
+		}
+
+		if (drmModeMoveCursor(drm->fd,
 			crtc->id, conn->cursor_x, conn->cursor_y) != 0) {
-		wlr_log_errno(WLR_ERROR, "%s: failed to move cursor", conn->output.name);
+			wlr_log_errno(WLR_ERROR, "%s: failed to move cursor",
-		return false;
+				conn->output.name);
+			return false;
+		}
+	} else {
+		if (drmModeSetCursor(drm->fd, crtc->id, 0, 0, 0)) {
+			wlr_log_errno(WLR_DEBUG, "%s: failed to unset hardware cursor",
+				conn->output.name);
+			return false;
+		}
 	}
 
 	if (flags & DRM_MODE_PAGE_FLIP_EVENT) {
@@ -73,32 +99,6 @@ static bool legacy_crtc_commit(struct wlr_drm_backend *drm,
 	return true;
 }
 
-bool legacy_crtc_set_cursor(struct wlr_drm_backend *drm,
-		struct wlr_drm_crtc *crtc, struct gbm_bo *bo) {
-	if (!crtc || !crtc->cursor) {
-		return true;
-	}
-
-	if (!bo) {
-		if (drmModeSetCursor(drm->fd, crtc->id, 0, 0, 0)) {
-			wlr_log_errno(WLR_DEBUG, "Failed to clear hardware cursor");
-			return false;
-		}
-		return true;
-	}
-
-	struct wlr_drm_plane *plane = crtc->cursor;
-
-	if (drmModeSetCursor(drm->fd, crtc->id, gbm_bo_get_handle(bo).u32,
-			plane->surf.width, plane->surf.height)) {
-		wlr_log_errno(WLR_DEBUG, "Failed to set hardware cursor");
-		return false;
-	}
-
-	drm_fb_move(&crtc->cursor->queued_fb, &crtc->cursor->pending_fb);
-	return true;
-}
-
 bool drm_legacy_crtc_set_gamma(struct wlr_drm_backend *drm,
 		struct wlr_drm_crtc *crtc) {
 	uint32_t size = crtc->gamma_table_size;
@@ -124,6 +124,5 @@ static size_t legacy_crtc_get_gamma_size(struct wlr_drm_backend *drm,
 
 const struct wlr_drm_interface legacy_iface = {
 	.crtc_commit = legacy_crtc_commit,
-	.crtc_set_cursor = legacy_crtc_set_cursor,
 	.crtc_get_gamma_size = legacy_crtc_get_gamma_size,
 };

include/backend/drm/iface.h

@@ -16,9 +16,6 @@ struct wlr_drm_interface {
 	// Commit al pending changes on a CRTC.
 	bool (*crtc_commit)(struct wlr_drm_backend *drm,
 		struct wlr_drm_connector *conn, uint32_t flags);
-	// Enable the cursor buffer on crtc. Set bo to NULL to disable
-	bool (*crtc_set_cursor)(struct wlr_drm_backend *drm,
-		struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
 	// Get the gamma lut size of a crtc
 	size_t (*crtc_get_gamma_size)(struct wlr_drm_backend *drm,
 		struct wlr_drm_crtc *crtc);