samples: lvgl: make lvgl demo testable with twister

1. add lvgl status output after starts
2. add extra_args platfrom filterable
3. add some platfroms shield as extra_args

Signed-off-by: Hake Huang <[email protected]>

Author: hakehuang

samples/modules/lvgl/demos/boards/mimxrt595_evk_mimxrt595s_cm33.conf

@@ -0,0 +1,10 @@
+#
+# Copyright 2024, NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+# Sample will allocate buffer equal to: (panelwidth / 8) * (panelwidth / 4) * pixel depth. For a
+# 1280x720 display in a 16-bpp format (e.g. RGB565), this is (1280 / 8) * (720 / 4) * 2 = 57600
+# bytes. We include 128 bytes of padding for kernel heap structures
+CONFIG_HEAP_MEM_POOL_SIZE=57600

samples/modules/lvgl/demos/sample.yaml

@@ -4,13 +4,22 @@ sample:
 common:
   modules:
     - lvgl
-  harness: none
+  harness: console
   filter: dt_chosen_enabled("zephyr,display")
+  extra_args:
+    - platform:mimxrt1060_evk:SHIELD=rk043fn66hs_ctg
+    - platform:mimxrt1170_evk/mimxrt1176/cm7:SHIELD=rk055hdmipi4ma0
+    - platform:mimxrt595_evk/mimxrt595s/cm33:SHIELD=rk055hdmipi4ma0
   tags:
     - samples
     - display
     - lvgl
     - gui
+  harness_config:
+    fixture: fixture_display
+    type: one_line
+    regex:
+      - "\\[\\w+ free bytes, \\w+ allocated bytes, overhead = \\w+ bytes | lvgl in malloc mode\\]"
 tests:
   sample.modules.lvgl.demo_music:
     extra_configs:
@@ -24,6 +33,7 @@ tests:
   sample.modules.lvgl.demo_widgets:
     extra_configs:
       - CONFIG_LV_Z_DEMO_WIDGETS=y
+
   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

@@ -7,7 +7,9 @@
 #include <zephyr/kernel.h>
 #include <zephyr/drivers/display.h>
 #include <lvgl.h>
+#include <lvgl_mem.h>
 #include <lv_demos.h>
+#include <stdio.h>
 
 #define LOG_LEVEL CONFIG_LOG_DEFAULT_LEVEL
 #include <zephyr/logging/log.h>
@@ -38,7 +40,11 @@ int main(void)
 
 	lv_task_handler();
 	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) {
 		uint32_t sleep_ms = lv_task_handler();