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fix(esp_lcd): Flush rgb lcd PSRAM framebuffers after allocation

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Flush PSRAM framebuffers after allocation to avoid visual corruption.

Merges https://github.com/espressif/esp-idf/pull/13294
Closes https://github.com/espressif/esp-idf/issues/13293
This commit is contained in:
Markus Ebner 2024-02-29 22:24:21 +01:00 committed by morris
parent e4f167df25
commit c755a62329
1 changed files with 5 additions and 1 deletions
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6
components/esp_lcd/rgb/esp_lcd_panel_rgb.c
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@ -153,10 +153,14 @@ static esp_err_t lcd_rgb_panel_alloc_frame_buffers(const esp_lcd_rgb_panel_confi
if (fb_in_psram) {
// the low level malloc function will help check the validation of alignment
rgb_panel->fbs[i] = heap_caps_aligned_calloc(psram_trans_align, 1, rgb_panel->fb_size, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
ESP_RETURN_ON_FALSE(rgb_panel->fbs[i], ESP_ERR_NO_MEM, TAG, "no mem for frame buffer");
// calloc not only allocates but also zero's the buffer. We have to make sure this is
// properly committed to the PSRAM, otherwise all sorts of visual corruption will happen.
ESP_RETURN_ON_ERROR(esp_cache_msync(rgb_panel->fbs[i], rgb_panel->fb_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M), TAG, "cache write back failed");
} else {
rgb_panel->fbs[i] = heap_caps_aligned_calloc(sram_trans_align, 1, rgb_panel->fb_size, MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA);
ESP_RETURN_ON_FALSE(rgb_panel->fbs[i], ESP_ERR_NO_MEM, TAG, "no mem for frame buffer");
}
ESP_RETURN_ON_FALSE(rgb_panel->fbs[i], ESP_ERR_NO_MEM, TAG, "no mem for frame buffer");
}
}