samples: modules: lvgl: demos: added new test cases

that uses the LVGL internal workqueue option to
drive the LVGL core automatically

Signed-off-by: Felipe Neves <[email protected]>

Author: uLipe

samples/modules/lvgl/demos/sample.yaml

@@ -41,6 +41,13 @@ tests:
   sample.modules.lvgl.demo_render:
     extra_configs:
       - CONFIG_LV_Z_DEMO_RENDER=y
+  sample.modules.lvgl.demo_benchmark.lvgl_auto:
+    extra_configs:
+      - CONFIG_LV_Z_DEMO_BENCHMARK=y
+      - CONFIG_LV_USE_DEMO_WIDGETS=y
+      - CONFIG_LV_Z_RUN_LVGL_ON_WORKQUEUE=y
+      - CONFIG_LV_Z_LVGL_WORKQUEUE_STACK_SIZE=8192
+      - CONFIG_LV_Z_LVGL_WORKQUEUE_PRIORITY=0
   sample.modules.lvgl.demos.st_b_lcd40_dsi1_mb1166:
     filter: dt_compat_enabled("orisetech,otm8009a")
     platform_allow: stm32h747i_disco/stm32h747xx/m7

samples/modules/lvgl/demos/src/main.c

@@ -53,17 +53,24 @@ int main(void)
 #error Enable one of the demos CONFIG_LV_Z_DEMO_*
 #endif
 
+#ifndef CONFIG_LV_Z_RUN_LVGL_ON_WORKQUEUE
 	lv_timer_handler();
+#endif
+
 	display_blanking_off(display_dev);
 #ifdef CONFIG_LV_Z_MEM_POOL_SYS_HEAP
 	lvgl_print_heap_info(false);
 #else
 	printf("lvgl in malloc mode\n");
 #endif
 	while (1) {
+#ifndef CONFIG_LV_Z_RUN_LVGL_ON_WORKQUEUE
 		uint32_t sleep_ms = lv_timer_handler();
-
 		k_msleep(MIN(sleep_ms, INT32_MAX));
+#else
+		/* LVGL managed by dedicated workqueue, just put an application side delay */
+		k_msleep(10);
+#endif
 #ifdef CONFIG_LV_Z_DEMO_RENDER_SCENE_DYNAMIC
 		if (sys_timepoint_expired(next_scene_switch)) {
 			cur_scene = (cur_scene + 1) % LV_DEMO_RENDER_SCENE_NUM;