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Fix the RGB display cache flush on ESP32-P4 and ESP32-S31 #11632

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Merged
dhalbert merged 1 commit into from
Oct 19, 2026
+2 −4
Merged

Fix the RGB display cache flush on ESP32-P4 and ESP32-S31 #11632

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6 changes: 2 additions & 4 deletions ports/espressif/common-hal/dotclockframebuffer/DotClockFramebuffer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -34,9 +34,7 @@
#include "hal/gpio_hal.h"
#include "soc/lcd_cam_struct.h"
#include "esp_heap_caps.h"

// should be from rom/cache.h but it wasn't working
int Cache_WriteBack_Addr(uint32_t addr, uint32_t size);
#include "esp_cache.h"

#define LCD_RGB_ISR_IRAM_SAFE (1)
#define LCD_RGB_INTR_ALLOC_FLAGS (ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_INTRDISABLED)
Expand Down Expand Up @@ -213,7 +211,7 @@ mp_int_t common_hal_dotclockframebuffer_framebuffer_get_first_pixel_offset(dotcl
}

void common_hal_dotclockframebuffer_framebuffer_refresh(dotclockframebuffer_framebuffer_obj_t *self) {
Cache_WriteBack_Addr((uint32_t)(self->bufinfo.buf), self->bufinfo.len);
esp_cache_msync(self->bufinfo.buf, self->bufinfo.len, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
}

mp_int_t common_hal_dotclockframebuffer_framebuffer_get_refresh_rate(dotclockframebuffer_framebuffer_obj_t *self) {
Expand Down
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