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feat(i80_lcd): add help function to allocate draw buffer with proper alignment

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This commit is contained in:
morris
2024-06-11 13:50:38 +08:00
parent 33ac88cd31
commit b6bc597903
4 changed files with 42 additions and 13 deletions
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components/esp_lcd/i80/esp_lcd_panel_io_i2s.c
+9 -1
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -321,6 +321,14 @@ err:
return ret;
}
void *esp_lcd_i80_alloc_draw_buffer(esp_lcd_panel_io_handle_t io, size_t size, uint32_t caps)
{
ESP_RETURN_ON_FALSE(io, NULL, TAG, "invalid argument");
ESP_RETURN_ON_FALSE((caps & MALLOC_CAP_SPIRAM) == 0, NULL, TAG, "external memory is not supported");
// DMA can only carry internal memory
return heap_caps_aligned_calloc(4, 1, size, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT | MALLOC_CAP_DMA);
}
static esp_err_t panel_io_i80_del(esp_lcd_panel_io_t *io)
{
lcd_panel_io_i80_t *i80_device = __containerof(io, lcd_panel_io_i80_t, base);
components/esp_lcd/i80/esp_lcd_panel_io_i80.c
+15
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@@ -583,6 +583,21 @@ err:
return ret;
}
void *esp_lcd_i80_alloc_draw_buffer(esp_lcd_panel_io_handle_t io, size_t size, uint32_t caps)
{
ESP_RETURN_ON_FALSE(io, NULL, TAG, "invalid argument");
lcd_panel_io_i80_t *i80_device = __containerof(io, lcd_panel_io_i80_t, base);
esp_lcd_i80_bus_t *bus = i80_device->bus;
void *buf = NULL;
// alloc from external memory
if (caps & MALLOC_CAP_SPIRAM) {
buf = heap_caps_aligned_calloc(bus->ext_mem_align, 1, size, MALLOC_CAP_8BIT | MALLOC_CAP_SPIRAM | MALLOC_CAP_DMA);
} else {
buf = heap_caps_aligned_calloc(bus->int_mem_align, 1, size, MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA);
}
return buf;
}
static esp_err_t lcd_i80_bus_configure_gpio(esp_lcd_i80_bus_handle_t bus, const esp_lcd_i80_bus_config_t *bus_config)
{
int bus_id = bus->bus_id;
components/esp_lcd/include/esp_lcd_io_i80.h
+12
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@@ -100,6 +100,18 @@ typedef struct {
*/
esp_err_t esp_lcd_new_panel_io_i80(esp_lcd_i80_bus_handle_t bus, const esp_lcd_panel_io_i80_config_t *io_config, esp_lcd_panel_io_handle_t *ret_io);
/**
* @brief Allocate a draw buffer that can be used by I80 interfaced LCD panel
*
* @note This function differs from the normal 'heap_caps_*' functions in that it can also automatically handle the alignment required by DMA burst, cache line size, etc.
*
* @param[in] io Panel IO handle, created by `esp_lcd_new_panel_io_i80()`
* @param[in] size Size of memory to be allocated
* @param[in] caps Bitwise OR of MALLOC_CAP_* flags indicating the type of memory desired for the allocation
* @return Pointer to a new buffer of size 'size' with capabilities 'caps', or NULL if allocation failed
*/
void *esp_lcd_i80_alloc_draw_buffer(esp_lcd_panel_io_handle_t io, size_t size, uint32_t caps);
#endif // SOC_LCD_I80_SUPPORTED
#ifdef __cplusplus