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fix(fbdev): Implement proper cleanup from deletion event in FBDEV (#9169)

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This commit is contained in:
Mazdak Farzone
2025-11-03 22:13:07 +01:00
committed by GitHub
parent 399bde8dec
commit 79530036bf
1 changed files with 37 additions and 3 deletions
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src/drivers/display/fb/lv_linux_fbdev.c
+37 -3
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@@ -68,12 +68,15 @@ typedef struct {
long int screensize;
int fbfd;
bool force_refresh;
uint8_t * draw_buf_1;
uint8_t * draw_buf_2;
} lv_linux_fb_t;
/**********************
* STATIC PROTOTYPES
**********************/
static void del_event_cb(lv_event_t * e);
static void flush_cb(lv_display_t * disp, const lv_area_t * area, uint8_t * color_p);
static uint32_t tick_get_cb(void);
@@ -113,6 +116,7 @@ lv_display_t * lv_linux_fbdev_create(void)
dsc->fbfd = -1;
lv_display_set_driver_data(disp, dsc);
lv_display_set_flush_cb(disp, flush_cb);
lv_display_add_event_cb(disp, del_event_cb, LV_EVENT_DELETE, NULL);
return disp;
}
@@ -227,12 +231,15 @@ void lv_linux_fbdev_set_file(lv_display_t * disp, const char * file)
uint8_t * draw_buf = NULL;
uint8_t * draw_buf_2 = NULL;
draw_buf = malloc(draw_buf_size);
draw_buf = lv_malloc(draw_buf_size);
if(LV_LINUX_FBDEV_BUFFER_COUNT == 2) {
draw_buf_2 = malloc(draw_buf_size);
draw_buf_2 = lv_malloc(draw_buf_size);
}
dsc->draw_buf_1 = draw_buf;
dsc->draw_buf_2 = draw_buf_2;
lv_display_set_resolution(disp, hor_res, ver_res);
lv_display_set_buffers(disp, draw_buf, draw_buf_2, draw_buf_size, LV_LINUX_FBDEV_RENDER_MODE);
@@ -242,7 +249,6 @@ void lv_linux_fbdev_set_file(lv_display_t * disp, const char * file)
LV_LOG_INFO("Resolution is set to %" LV_PRId32 "x%" LV_PRId32 " at %" LV_PRId32 "dpi",
hor_res, ver_res, lv_display_get_dpi(disp));
/* TODO: map delete event callback to deallocate buffers */
}
void lv_linux_fbdev_set_force_refresh(lv_display_t * disp, bool enabled)
@@ -266,6 +272,34 @@ static void write_to_fb(lv_linux_fb_t * dsc, uint32_t fb_pos, const void * data,
#endif
}
static void del_event_cb(lv_event_t * e)
{
if(LV_EVENT_DELETE != lv_event_get_code(e))
return;
lv_display_t * disp = lv_event_get_target(e);
lv_linux_fb_t * dsc = lv_display_get_driver_data(disp);
if(!dsc) return;
#if LV_LINUX_FBDEV_MMAP
if(MAP_FAILED != dsc->fbp) {
munmap(dsc->fbp, dsc->screensize);
dsc->fbp = MAP_FAILED;
}
#endif
if(dsc->fbfd >= 0) {
close(dsc->fbfd);
dsc->fbfd = -1;
}
if(dsc->rotated_buf) lv_free(dsc->rotated_buf);
if(dsc->draw_buf_1) lv_free(dsc->draw_buf_1);
if(dsc->draw_buf_2) lv_free(dsc->draw_buf_2);
if(dsc->devname) lv_free((void *)dsc->devname);
lv_free(dsc);
lv_display_set_driver_data(disp, NULL);
}
static void flush_cb(lv_display_t * disp, const lv_area_t * area, uint8_t * color_p)
{
lv_linux_fb_t * dsc = lv_display_get_driver_data(disp);