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display: stm32: ltdc: add SMH buffer alignment config option

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Add the CONFIG_STM32_LTDC_FB_SMH_ALIGN option in order to
indicate the alignment required for the buffer allocated via
SMH.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
This commit is contained in:
Alain Volmat 2025-06-12 10:31:55 +02:00 • committed by Benjamin Cabé
commit b1e55bd342
2 changed files with 6 additions and 1 deletions
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5
drivers/display/Kconfig.stm32_ltdc
View file

@ -67,6 +67,11 @@ config STM32_LTDC_FB_SMH_ATTRIBUTE
1: SMH_REG_ATTR_NON_CACHEABLE
2: SMH_REG_ATTR_EXTERNAL
config STM32_LTDC_FB_SMH_ALIGN
int "Shared multi heap buffer alignment for the display buffer"
depends on STM32_LTDC_FB_USE_SHARED_MULTI_HEAP
default 32
config STM32_LTDC_DISABLE_FMC_BANK1
bool "Disable FMC bank1 for STM32F7/H7 series"
depends on SOC_SERIES_STM32H7X || SOC_SERIES_STM32F7X

2
drivers/display/display_stm32_ltdc.c
View file

@ -445,7 +445,7 @@ static int stm32_ltdc_init(const struct device *dev)
#if defined(CONFIG_STM32_LTDC_FB_USE_SHARED_MULTI_HEAP)
data->frame_buffer = shared_multi_heap_aligned_alloc(
CONFIG_STM32_LTDC_FB_SMH_ATTRIBUTE,
32,
CONFIG_STM32_LTDC_FB_SMH_ALIGN,
CONFIG_STM32_LTDC_FB_NUM * data->frame_buffer_len);
if (data->frame_buffer == NULL) {