Memory Leak in lvgl_port_remove_disp Related to draw_ctx (BSP-604)

[huhaifan]

Board

Custom board

Hardware Description

Custom board

IDE Name

VSCode

Operating System

Windows11

Description

Environment:

LVGL Version: 8.4.0
esp_lvgl_port Version: 2.4.3

Description:

I have encountered a memory leak when calling lvgl_port_remove_disp after lvgl_port_add_disp. The issue seems to originate from the draw_ctx not being properly deinitialized and freed.

1. Call lvgl_port_add_disp to add a display.
2. Call lvgl_port_remove_disp to remove the display.
3. Observe the memory leak related to draw_ctx.

Proposed Fix:

To resolve this issue, I suggest modifying the lvgl_port_remove_disp function to include the following code:

if (disp_drv->draw_ctx) {
    disp_drv->draw_ctx_deinit(disp_drv, disp_drv->draw_ctx);
    lv_mem_free(disp_drv->draw_ctx);
    disp_drv->draw_ctx = NULL;
}

Sketch

lvgl_port_add_disp() then lvgl_port_remove_disp()

Other Steps to Reproduce

No response

I have checked existing issues, README.md and ESP32 Forum

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.