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zephyr/modules/lvgl/lvgl.c
Fabian Blatz 5cffb8e5a6 modules: lvgl: Register print callback after lv_init 
Move initialization of the print callback handler after calling lv_init, as
the latter zeroes the global callback structure.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
2025-05-30 16:37:57 +02:00

333 lines
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C
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/*
* Copyright (c) 2018-2019 Jan Van Winkel <jan.van_winkel@dxplore.eu>
* Copyright (c) 2025 Abderrahmane JARMOUNI
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <lvgl.h>
#include "lvgl_display.h"
#include "lvgl_common_input.h"
#include "lvgl_zephyr.h"
#ifdef CONFIG_LV_Z_USE_FILESYSTEM
#include "lvgl_fs.h"
#endif
#ifdef CONFIG_LV_Z_MEM_POOL_SYS_HEAP
#include "lvgl_mem.h"
#endif
#include LV_STDLIB_INCLUDE
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(lvgl, CONFIG_LV_Z_LOG_LEVEL);
static lv_display_t *lv_displays[DT_ZEPHYR_DISPLAYS_COUNT];
struct lvgl_disp_data disp_data[DT_ZEPHYR_DISPLAYS_COUNT] = {{
.blanking_on = false,
}};
#if DT_HAS_COMPAT_STATUS_OKAY(zephyr_displays)
#define DISPLAY_NODE(n) DT_ZEPHYR_DISPLAY(n)
#elif DT_HAS_CHOSEN(zephyr_display)
#define DISPLAY_NODE(n) DT_CHOSEN(zephyr_display)
#else
#error Could not find "zephyr,display" chosen property, or a "zephyr,displays" compatible node in DT
#define DISPLAY_NODE(n) DT_INVALID_NODE
#endif
#define IS_MONOCHROME_DISPLAY \
UTIL_OR(IS_EQ(CONFIG_LV_Z_BITS_PER_PIXEL, 1), IS_EQ(CONFIG_LV_COLOR_DEPTH_1, 1))
#define ALLOC_MONOCHROME_CONV_BUFFER \
UTIL_AND(IS_EQ(IS_MONOCHROME_DISPLAY, 1), \
IS_EQ(CONFIG_LV_Z_MONOCHROME_CONVERSION_BUFFER, 1))
#ifdef CONFIG_LV_Z_BUFFER_ALLOC_STATIC
#define DISPLAY_WIDTH(n) DT_PROP(DISPLAY_NODE(n), width)
#define DISPLAY_HEIGHT(n) DT_PROP(DISPLAY_NODE(n), height)
#if IS_MONOCHROME_DISPLAY
/* monochrome buffers are expected to have 8 preceding bytes for the color palette */
#define BUFFER_SIZE(n) \
(((CONFIG_LV_Z_VDB_SIZE * ROUND_UP(DISPLAY_WIDTH(n), 8) * \
ROUND_UP(DISPLAY_HEIGHT(n), 8)) / \
100) / 8 + \
8)
#else
#define BUFFER_SIZE(n) \
(CONFIG_LV_Z_BITS_PER_PIXEL * \
((CONFIG_LV_Z_VDB_SIZE * DISPLAY_WIDTH(n) * DISPLAY_HEIGHT(n)) / 100) / 8)
#endif /* IS_MONOCHROME_DISPLAY */
static uint32_t disp_buf_size[DT_ZEPHYR_DISPLAYS_COUNT] = {0};
static uint8_t *buf0_p[DT_ZEPHYR_DISPLAYS_COUNT] = {NULL};
#ifdef CONFIG_LV_Z_DOUBLE_VDB
static uint8_t *buf1_p[DT_ZEPHYR_DISPLAYS_COUNT] = {NULL};
#endif
#if ALLOC_MONOCHROME_CONV_BUFFER
static uint8_t *mono_vtile_buf_p[DT_ZEPHYR_DISPLAYS_COUNT] = {NULL};
#endif
/* NOTE: depending on chosen color depth, buffers may be accessed using uint8_t *,*/
/* uint16_t * or uint32_t *, therefore buffer needs to be aligned accordingly to */
/* prevent unaligned memory accesses. */
/* clang-format off */
#define LV_BUFFERS_DEFINE(n) \
static uint8_t buf0_##n[BUFFER_SIZE(n)] \
IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf))) \
__aligned(CONFIG_LV_Z_VDB_ALIGN); \
\
IF_ENABLED(CONFIG_LV_Z_DOUBLE_VDB, ( \
static uint8_t buf1_##n[BUFFER_SIZE(n)] \
IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf))) \
__aligned(CONFIG_LV_Z_VDB_ALIGN); \
)) \
\
IF_ENABLED(ALLOC_MONOCHROME_CONV_BUFFER, ( \
static uint8_t mono_vtile_buf_##n[BUFFER_SIZE(n)] \
IF_ENABLED(CONFIG_LV_Z_VDB_CUSTOM_SECTION, (Z_GENERIC_SECTION(.lvgl_buf))) \
__aligned(CONFIG_LV_Z_VDB_ALIGN); \
))
FOR_EACH(LV_BUFFERS_DEFINE, (), LV_DISPLAYS_IDX_LIST);
#define LV_BUFFERS_REFERENCES(n) \
disp_buf_size[n] = (uint32_t)BUFFER_SIZE(n); \
buf0_p[n] = buf0_##n; \
IF_ENABLED(CONFIG_LV_Z_DOUBLE_VDB, (buf1_p[n] = buf1_##n;)) \
IF_ENABLED(ALLOC_MONOCHROME_CONV_BUFFER, (mono_vtile_buf_p[n] = mono_vtile_buf_##n;))
/* clang-format on */
#endif /* CONFIG_LV_Z_BUFFER_ALLOC_STATIC */
#if CONFIG_LV_Z_LOG_LEVEL != 0
static void lvgl_log(lv_log_level_t level, const char *buf)
{
switch (level) {
case LV_LOG_LEVEL_ERROR:
LOG_ERR("%s", buf + (sizeof("[Error] ") - 1));
break;
case LV_LOG_LEVEL_WARN:
LOG_WRN("%s", buf + (sizeof("[Warn] ") - 1));
break;
case LV_LOG_LEVEL_INFO:
LOG_INF("%s", buf + (sizeof("[Info] ") - 1));
break;
case LV_LOG_LEVEL_TRACE:
LOG_DBG("%s", buf + (sizeof("[Trace] ") - 1));
break;
case LV_LOG_LEVEL_USER:
LOG_INF("%s", buf + (sizeof("[User] ") - 1));
break;
}
}
#endif
#ifdef CONFIG_LV_Z_BUFFER_ALLOC_STATIC
static void lvgl_allocate_rendering_buffers_static(lv_display_t *display, int disp_idx)
{
#ifdef CONFIG_LV_Z_DOUBLE_VDB
lv_display_set_buffers(display, buf0_p[disp_idx], buf1_p[disp_idx], disp_buf_size[disp_idx],
LV_DISPLAY_RENDER_MODE_PARTIAL);
#else
lv_display_set_buffers(display, buf0_p[disp_idx], NULL, disp_buf_size[disp_idx],
LV_DISPLAY_RENDER_MODE_PARTIAL);
#endif /* CONFIG_LV_Z_DOUBLE_VDB */
#if ALLOC_MONOCHROME_CONV_BUFFER
lvgl_set_mono_conversion_buffer(mono_vtile_buf_p[disp_idx], disp_buf_size[disp_idx]);
#endif
}
#else
static int lvgl_allocate_rendering_buffers(lv_display_t *display)
{
void *buf0 = NULL;
void *buf1 = NULL;
uint16_t buf_nbr_pixels;
uint32_t buf_size;
struct lvgl_disp_data *data = (struct lvgl_disp_data *)lv_display_get_user_data(display);
uint16_t hor_res = lv_display_get_horizontal_resolution(display);
uint16_t ver_res = lv_display_get_vertical_resolution(display);
buf_nbr_pixels = (CONFIG_LV_Z_VDB_SIZE * hor_res * ver_res) / 100;
/* one horizontal line is the minimum buffer requirement for lvgl */
if (buf_nbr_pixels < hor_res) {
buf_nbr_pixels = hor_res;
}
switch (data->cap.current_pixel_format) {
case PIXEL_FORMAT_ARGB_8888:
buf_size = 4 * buf_nbr_pixels;
break;
case PIXEL_FORMAT_RGB_888:
buf_size = 3 * buf_nbr_pixels;
break;
case PIXEL_FORMAT_RGB_565:
buf_size = 2 * buf_nbr_pixels;
break;
case PIXEL_FORMAT_L_8:
buf_size = buf_nbr_pixels;
break;
case PIXEL_FORMAT_MONO01:
case PIXEL_FORMAT_MONO10:
buf_size = buf_nbr_pixels / 8 + 8;
buf_size += (buf_nbr_pixels % 8) == 0 ? 0 : 1;
break;
default:
return -ENOTSUP;
}
buf0 = lv_malloc(buf_size);
if (buf0 == NULL) {
LOG_ERR("Failed to allocate memory for rendering buffer");
return -ENOMEM;
}
#ifdef CONFIG_LV_Z_DOUBLE_VDB
buf1 = lv_malloc(buf_size);
if (buf1 == NULL) {
lv_free(buf0);
LOG_ERR("Failed to allocate memory for rendering buffer");
return -ENOMEM;
}
#endif
#if ALLOC_MONOCHROME_CONV_BUFFER
void *vtile_buf = lv_malloc(buf_size);
if (vtile_buf == NULL) {
lv_free(buf0);
lv_free(buf1);
LOG_ERR("Failed to allocate memory for vtile buffer");
return -ENOMEM;
}
lvgl_set_mono_conversion_buffer(vtile_buf, buf_size);
#endif /* ALLOC_MONOCHROME_CONV_BUFFER */
lv_display_set_buffers(display, buf0, buf1, buf_size, LV_DISPLAY_RENDER_MODE_PARTIAL);
return 0;
}
#endif /* CONFIG_LV_Z_BUFFER_ALLOC_STATIC */
void lv_mem_init(void)
{
#ifdef CONFIG_LV_Z_MEM_POOL_SYS_HEAP
lvgl_heap_init();
#endif /* CONFIG_LV_Z_MEM_POOL_SYS_HEAP */
}
void lv_mem_deinit(void)
{
/* Reinitializing the heap clears all allocations, no action needed */
}
void lv_mem_monitor_core(lv_mem_monitor_t *mon_p)
{
memset(mon_p, 0, sizeof(lv_mem_monitor_t));
#if CONFIG_LV_Z_MEM_POOL_SYS_HEAP
struct sys_memory_stats stats;
lvgl_heap_stats(&stats);
mon_p->used_pct =
(stats.allocated_bytes * 100) / (stats.allocated_bytes + stats.free_bytes);
mon_p->max_used = stats.max_allocated_bytes;
#else
LOG_WRN_ONCE("Memory statistics only supported for CONFIG_LV_Z_MEM_POOL_SYS_HEAP");
#endif /* CONFIG_LV_Z_MEM_POOL_SYS_HEAP */
}
lv_result_t lv_mem_test_core(void)
{
/* Not supported for now */
return LV_RESULT_OK;
}
#define ENUMERATE_DISPLAY_DEVS(n) display_dev[n] = DEVICE_DT_GET(DISPLAY_NODE(n));
int lvgl_init(void)
{
const struct device *display_dev[DT_ZEPHYR_DISPLAYS_COUNT];
struct lvgl_disp_data *p_disp_data;
int err;
/* clang-format off */
FOR_EACH(ENUMERATE_DISPLAY_DEVS, (), LV_DISPLAYS_IDX_LIST);
/* clang-format on */
for (int i = 0; i < DT_ZEPHYR_DISPLAYS_COUNT; i++) {
if (!device_is_ready(display_dev[i])) {
LOG_ERR("Display device %d is not ready", i);
return -ENODEV;
}
}
lv_init();
lv_tick_set_cb(k_uptime_get_32);
#if CONFIG_LV_Z_LOG_LEVEL != 0
lv_log_register_print_cb(lvgl_log);
#endif
#ifdef CONFIG_LV_Z_USE_FILESYSTEM
lvgl_fs_init();
#endif
#ifdef CONFIG_LV_Z_BUFFER_ALLOC_STATIC
/* clang-format off */
FOR_EACH(LV_BUFFERS_REFERENCES, (), LV_DISPLAYS_IDX_LIST);
/* clang-format on */
#endif
for (int i = 0; i < DT_ZEPHYR_DISPLAYS_COUNT; i++) {
p_disp_data = &disp_data[i];
p_disp_data->display_dev = display_dev[i];
display_get_capabilities(display_dev[i], &p_disp_data->cap);
lv_displays[i] = lv_display_create(p_disp_data->cap.x_resolution,
p_disp_data->cap.y_resolution);
if (!lv_displays[i]) {
LOG_ERR("Failed to create display %d LV object.", i);
return -ENOMEM;
}
lv_display_set_user_data(lv_displays[i], p_disp_data);
if (set_lvgl_rendering_cb(lv_displays[i]) != 0) {
LOG_ERR("Display %d not supported.", i);
return -ENOTSUP;
}
#ifdef CONFIG_LV_Z_BUFFER_ALLOC_STATIC
lvgl_allocate_rendering_buffers_static(lv_displays[i], i);
#else
err = lvgl_allocate_rendering_buffers(lv_displays[i]);
if (err < 0) {
return err;
}
#endif
#ifdef CONFIG_LV_Z_FULL_REFRESH
lv_display_set_render_mode(lv_displays[i], LV_DISPLAY_RENDER_MODE_FULL);
#endif
}
err = lvgl_init_input_devices();
if (err < 0) {
LOG_ERR("Failed to initialize input devices.");
return err;
}
return 0;
}
#ifdef CONFIG_LV_Z_AUTO_INIT
SYS_INIT(lvgl_init, APPLICATION, CONFIG_LV_Z_INIT_PRIORITY);
#endif /* CONFIG_LV_Z_AUTO_INIT */
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