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modules: lvgl: support linking memory pool to custom section

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This patch adds a kconfig option `LV_Z_MEMORY_POOL_CUSTOM_SECTION`
which allows to place the buffer the memory pool is backed by into a
section with the label ".lvgl_heap".

Resolves issue: #66494.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
This commit is contained in:
Fabian Blatz 2024-03-21 09:40:25 +01:00 committed by Anas Nashif
parent 4123c531f3
commit b7b1a56124
2 changed files with 16 additions and 1 deletions
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9
modules/lvgl/Kconfig.memory
View file

@ -39,6 +39,15 @@ config LV_Z_MEM_POOL_SIZE
help
Size of the memory pool in bytes
config LV_Z_MEMORY_POOL_CUSTOM_SECTION
bool "Link memory pool to custom section"
depends on LV_Z_MEM_POOL_SYS_HEAP
help
Place LVGL memory pool in custom section, with tag ".lvgl_heap".
This can be used by custom linker scripts to relocate the LVGL
memory pool to a custom location, such as tightly coupled or
external memory.
config LV_Z_VDB_SIZE
int "Rendering buffer size"
default 100 if LV_Z_FULL_REFRESH

8
modules/lvgl/lvgl_mem.c
View file

@ -10,7 +10,13 @@
#include <zephyr/init.h>
#include <zephyr/sys/sys_heap.h>
static char lvgl_heap_mem[CONFIG_LV_Z_MEM_POOL_SIZE] __aligned(8);
#ifdef CONFIG_LV_Z_MEMORY_POOL_CUSTOM_SECTION
#define HEAP_MEM_ATTRIBUTES Z_GENERIC_SECTION(.lvgl_heap) __aligned(8)
#else
#define HEAP_MEM_ATTRIBUTES __aligned(8)
#endif /* CONFIG_LV_Z_MEMORY_POOL_CUSTOM_SECTION */
static char lvgl_heap_mem[CONFIG_LV_Z_MEM_POOL_SIZE] HEAP_MEM_ATTRIBUTES;
static struct sys_heap lvgl_heap;
static struct k_spinlock lvgl_heap_lock;