expo: cedit: Support writing settings to a file
Support writing settings from an expo into a file in FDT format. It
consists of a single node with a two properties for each sceneitem,
one with tag ID chosen by the user and another for its text value.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/boot/cedit.c b/boot/cedit.c
index 6c10b21..4dd79a2 100644
--- a/boot/cedit.c
+++ b/boot/cedit.c
@@ -9,6 +9,7 @@
#define LOG_CATEGORY LOGC_EXPO
#include <common.h>
+#include <abuf.h>
#include <cedit.h>
#include <cli.h>
#include <dm.h>
@@ -18,6 +19,15 @@
#include <linux/delay.h>
#include "scene_internal.h"
+/**
+ * struct cedit_iter_priv - private data for cedit operations
+ *
+ * @buf: Buffer to use when writing settings to the devicetree
+ */
+struct cedit_iter_priv {
+ struct abuf *buf;
+};
+
int cedit_arange(struct expo *exp, struct video_priv *vpriv, uint scene_id)
{
struct scene_obj_txt *txt;
@@ -182,3 +192,129 @@
return 0;
}
+
+static int check_space(int ret, struct abuf *buf)
+{
+ if (ret == -FDT_ERR_NOSPACE) {
+ if (!abuf_realloc_inc(buf, CEDIT_SIZE_INC))
+ return log_msg_ret("spc", -ENOMEM);
+ ret = fdt_resize(abuf_data(buf), abuf_data(buf),
+ abuf_size(buf));
+ if (ret)
+ return log_msg_ret("res", -EFAULT);
+ }
+
+ return 0;
+}
+
+static int h_write_settings(struct scene_obj *obj, void *vpriv)
+{
+ struct cedit_iter_priv *priv = vpriv;
+ struct abuf *buf = priv->buf;
+
+ switch (obj->type) {
+ case SCENEOBJT_NONE:
+ case SCENEOBJT_IMAGE:
+ case SCENEOBJT_TEXT:
+ break;
+ case SCENEOBJT_MENU: {
+ const struct scene_obj_menu *menu;
+ const struct scene_obj_txt *txt;
+ struct scene *scn = obj->scene;
+ const struct scene_menitem *mi;
+ const char *str;
+ char name[80];
+ int ret, i;
+
+ menu = (struct scene_obj_menu *)obj;
+ ret = -EAGAIN;
+ for (i = 0; ret && i < 2; i++) {
+ ret = fdt_property_u32(abuf_data(buf), obj->name,
+ menu->cur_item_id);
+ if (!i) {
+ ret = check_space(ret, buf);
+ if (ret)
+ return log_msg_ret("res", -ENOMEM);
+ }
+ }
+ /* this should not happen */
+ if (ret)
+ return log_msg_ret("wrt", -EFAULT);
+
+ mi = scene_menuitem_find(menu, menu->cur_item_id);
+ if (!mi)
+ return log_msg_ret("mi", -ENOENT);
+
+ txt = scene_obj_find(scn, mi->label_id, SCENEOBJT_TEXT);
+ if (!txt)
+ return log_msg_ret("txt", -ENOENT);
+
+ str = expo_get_str(scn->expo, txt->str_id);
+ if (!str)
+ return log_msg_ret("str", -ENOENT);
+
+ snprintf(name, sizeof(name), "%s-str", obj->name);
+ ret = -EAGAIN;
+ for (i = 0; ret && i < 2; i++) {
+ ret = fdt_property_string(abuf_data(buf), name, str);
+ if (!i) {
+ ret = check_space(ret, buf);
+ if (ret)
+ return log_msg_ret("rs2", -ENOMEM);
+ }
+ }
+
+ /* this should not happen */
+ if (ret)
+ return log_msg_ret("wr2", -EFAULT);
+
+ break;
+ }
+ }
+
+ return 0;
+}
+
+int cedit_write_settings(struct expo *exp, struct abuf *buf)
+{
+ struct cedit_iter_priv priv;
+ void *fdt;
+ int ret;
+
+ abuf_init(buf);
+ if (!abuf_realloc(buf, CEDIT_SIZE_INC))
+ return log_msg_ret("buf", -ENOMEM);
+
+ fdt = abuf_data(buf);
+ ret = fdt_create(fdt, abuf_size(buf));
+ if (!ret)
+ ret = fdt_finish_reservemap(fdt);
+ if (!ret)
+ ret = fdt_begin_node(fdt, "");
+ if (!ret)
+ ret = fdt_begin_node(fdt, CEDIT_NODE_NAME);
+ if (ret) {
+ log_debug("Failed to start FDT (err=%d)\n", ret);
+ return log_msg_ret("sta", -EINVAL);
+ }
+
+ /* write out the items */
+ priv.buf = buf;
+ ret = expo_iter_scene_objs(exp, h_write_settings, &priv);
+ if (ret) {
+ log_debug("Failed to write settings (err=%d)\n", ret);
+ return log_msg_ret("set", ret);
+ }
+
+ ret = fdt_end_node(fdt);
+ if (!ret)
+ ret = fdt_end_node(fdt);
+ if (!ret)
+ ret = fdt_finish(fdt);
+ if (ret) {
+ log_debug("Failed to finish FDT (err=%d)\n", ret);
+ return log_msg_ret("fin", -EINVAL);
+ }
+
+ return 0;
+}