kopia lustrzana https://github.com/espressif/esp-idf
428 wiersze
19 KiB
C
428 wiersze
19 KiB
C
/*
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* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/semphr.h"
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#include "soc/soc_caps.h"
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#include "esp_check.h"
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#include "esp_lcd_panel_interface.h"
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#include "esp_lcd_mipi_dsi.h"
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#include "esp_clk_tree.h"
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#include "esp_cache.h"
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#include "mipi_dsi_priv.h"
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#include "esp_async_fbcpy.h"
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#include "esp_private/dw_gdma.h"
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#include "hal/cache_hal.h"
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#include "hal/cache_ll.h"
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static const char *TAG = "lcd.dsi.dpi";
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typedef struct esp_lcd_dpi_panel_t esp_lcd_dpi_panel_t;
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static esp_err_t dpi_panel_del(esp_lcd_panel_t *panel);
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static esp_err_t dpi_panel_init(esp_lcd_panel_t *panel);
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static esp_err_t dpi_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data);
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struct esp_lcd_dpi_panel_t {
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esp_lcd_panel_t base; // Base class of generic lcd panel
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esp_lcd_dsi_bus_handle_t bus; // DSI bus handle
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uint8_t virtual_channel; // Virtual channel ID, index from 0
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void *frame_buffer; // Frame buffer
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uint32_t h_pixels; // Horizontal pixels
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uint32_t v_pixels; // Vertical pixels
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size_t frame_buffer_size; // Frame buffer size
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size_t bytes_per_pixel; // Bytes per pixel
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lcd_color_rgb_pixel_format_t pixel_format; // RGB Pixel format
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dw_gdma_channel_handle_t dma_chan; // DMA channel
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dw_gdma_link_list_handle_t link_list; // DMA link list
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esp_async_fbcpy_handle_t fbcpy_handle; // Use DMA2D to do frame buffer copy
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SemaphoreHandle_t draw_sem; // A semaphore used to synchronize the draw operations when DMA2D is used
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esp_lcd_dpi_panel_color_trans_done_cb_t on_color_trans_done; // Callback invoked when color data transfer has finished
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void* user_ctx; // User context for the callback
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};
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IRAM_ATTR
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static bool async_fbcpy_done_cb(esp_async_fbcpy_handle_t mcp, esp_async_fbcpy_event_data_t *event, void *cb_args)
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{
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bool need_yield = false;
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esp_lcd_dpi_panel_t* dpi_panel = (esp_lcd_dpi_panel_t*)cb_args;
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// release the draw semaphore first
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BaseType_t task_woken = pdFALSE;
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xSemaphoreGiveFromISR(dpi_panel->draw_sem, &task_woken);
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if (task_woken == pdTRUE) {
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need_yield = true;
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}
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if (dpi_panel->on_color_trans_done) {
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if (dpi_panel->on_color_trans_done(&dpi_panel->base, NULL, dpi_panel->user_ctx)) {
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need_yield = true;
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}
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}
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return need_yield;
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}
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IRAM_ATTR
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static bool dma_list_invalid_block_cb(dw_gdma_channel_handle_t chan, const dw_gdma_break_event_data_t *event_data, void *user_data)
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{
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dw_gdma_lli_handle_t lli = event_data->invalid_lli;
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dw_gdma_block_markers_t markers = {
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.is_valid = true, // mark the block as valid so that the DMA can continue the transfer
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};
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dw_gdma_lli_set_block_markers(lli, markers);
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// after the item is marked as valid again, tell the DMA to continue the transfer
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dw_gdma_channel_continue(chan);
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return false;
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}
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static esp_err_t dpi_panel_create_dma_link(esp_lcd_dpi_panel_t *dpi_panel)
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{
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esp_err_t ret = ESP_OK;
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dw_gdma_channel_handle_t dma_chan = NULL;
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dw_gdma_link_list_handle_t link_list = NULL;
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// sending image stream from memory to the DSI bridge
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dw_gdma_channel_alloc_config_t dma_alloc_config = {
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.src = {
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.block_transfer_type = DW_GDMA_BLOCK_TRANSFER_LIST,
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.role = DW_GDMA_ROLE_MEM,
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.handshake_type = DW_GDMA_HANDSHAKE_HW,
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.num_outstanding_requests = 5,
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},
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.dst = {
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.block_transfer_type = DW_GDMA_BLOCK_TRANSFER_LIST,
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.role = DW_GDMA_ROLE_PERIPH_DSI,
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.handshake_type = DW_GDMA_HANDSHAKE_HW,
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.num_outstanding_requests = 2,
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},
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.flow_controller = DW_GDMA_FLOW_CTRL_DST, // the DSI bridge as the DMA flow controller
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.chan_priority = 1,
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};
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ESP_GOTO_ON_ERROR(dw_gdma_new_channel(&dma_alloc_config, &dma_chan), err, TAG, "create DMA channel failed");
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// create a linked list for the DMA channel
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dw_gdma_link_list_config_t link_list_config = {
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.num_items = 1, // Assume one link item can carry the whole image
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.link_type = DW_GDMA_LINKED_LIST_TYPE_CIRCULAR,
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};
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ESP_GOTO_ON_ERROR(dw_gdma_new_link_list(&link_list_config, &link_list), err, TAG, "create DMA link list failed");
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// register DMA ISR callbacks
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dw_gdma_event_callbacks_t dsi_dma_cbs = {
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.on_invalid_block = dma_list_invalid_block_cb,
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};
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ESP_GOTO_ON_ERROR(dw_gdma_channel_register_event_callbacks(dma_chan, &dsi_dma_cbs, NULL), err, TAG, "register DMA callbacks failed");
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dpi_panel->dma_chan = dma_chan;
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dpi_panel->link_list = link_list;
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return ESP_OK;
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err:
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if (dma_chan) {
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dw_gdma_del_channel(dma_chan);
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}
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if (link_list) {
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dw_gdma_del_link_list(link_list);
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}
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return ret;
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}
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esp_err_t esp_lcd_new_panel_dpi(esp_lcd_dsi_bus_handle_t bus, const esp_lcd_dpi_panel_config_t *panel_config, esp_lcd_panel_handle_t *ret_panel)
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{
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esp_err_t ret = ESP_OK;
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void *frame_buffer = NULL;
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esp_lcd_dpi_panel_t *dpi_panel = NULL;
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esp_async_fbcpy_handle_t fbcpy_ctx = NULL;
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ESP_RETURN_ON_FALSE(bus && panel_config && ret_panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
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ESP_RETURN_ON_FALSE(panel_config->virtual_channel < 4, ESP_ERR_INVALID_ARG, TAG, "invalid virtual channel %d", panel_config->virtual_channel);
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ESP_RETURN_ON_FALSE(panel_config->dpi_clock_freq_mhz, ESP_ERR_INVALID_ARG, TAG, "invalid DPI clock frequency %"PRIu32, panel_config->dpi_clock_freq_mhz);
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#if !SOC_DMA2D_SUPPORTED
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ESP_RETURN_ON_FALSE(!panel_config->flags.use_dma2d, ESP_ERR_NOT_SUPPORTED, TAG, "DMA2D is not supported");
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#endif // !SOC_DMA2D_SUPPORTED
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int bus_id = bus->bus_id;
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mipi_dsi_hal_context_t *hal = &bus->hal;
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dpi_panel = heap_caps_calloc(1, sizeof(esp_lcd_dpi_panel_t), DSI_MEM_ALLOC_CAPS);
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ESP_GOTO_ON_FALSE(dpi_panel, ESP_ERR_NO_MEM, err, TAG, "no memory for DPI panel");
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dpi_panel->virtual_channel = panel_config->virtual_channel;
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dpi_panel->pixel_format = panel_config->pixel_format;
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dpi_panel->bus = bus;
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// allocate frame buffer from PSRAM
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size_t bytes_per_pixel = 0;
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switch (panel_config->pixel_format) {
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case LCD_COLOR_PIXEL_FORMAT_RGB565:
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bytes_per_pixel = 2;
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break;
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case LCD_COLOR_PIXEL_FORMAT_RGB666:
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bytes_per_pixel = 3;
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break;
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case LCD_COLOR_PIXEL_FORMAT_RGB888:
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bytes_per_pixel = 3;
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break;
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}
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uint32_t cache_line_size = cache_hal_get_cache_line_size(CACHE_LL_LEVEL_EXT_MEM, CACHE_TYPE_DATA);
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// DMA doesn't have requirement on the buffer alignment, but the cache does
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uint32_t alignment = cache_line_size;
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size_t frame_buffer_size = panel_config->video_timing.h_size * panel_config->video_timing.v_size * bytes_per_pixel;
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frame_buffer = heap_caps_aligned_calloc(alignment, 1, frame_buffer_size, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
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ESP_GOTO_ON_FALSE(frame_buffer, ESP_ERR_NO_MEM, err, TAG, "no memory for frame buffer");
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dpi_panel->frame_buffer = frame_buffer;
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dpi_panel->frame_buffer_size = frame_buffer_size;
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dpi_panel->bytes_per_pixel = bytes_per_pixel;
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dpi_panel->h_pixels = panel_config->video_timing.h_size;
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dpi_panel->v_pixels = panel_config->video_timing.v_size;
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// preset the frame buffer with black color
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ESP_GOTO_ON_ERROR(esp_cache_msync(frame_buffer, frame_buffer_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M), err, TAG, "cache write back failed");
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#if SOC_DMA2D_SUPPORTED
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if (panel_config->flags.use_dma2d) {
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esp_async_fbcpy_config_t fbcpy_config = {};
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ESP_GOTO_ON_ERROR(esp_async_fbcpy_install(&fbcpy_config, &fbcpy_ctx), err, TAG, "install async memcpy 2d failed");
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dpi_panel->fbcpy_handle = fbcpy_ctx;
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dpi_panel->draw_sem = xSemaphoreCreateBinaryWithCaps(DSI_MEM_ALLOC_CAPS);
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ESP_GOTO_ON_FALSE(dpi_panel->draw_sem, ESP_ERR_NO_MEM, err, TAG, "no memory for draw semaphore");
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xSemaphoreGive(dpi_panel->draw_sem);
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}
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#endif // SOC_DMA2D_SUPPORTED
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// if the clock source is not assigned, fallback to the default clock source
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mipi_dsi_dpi_clock_source_t dpi_clk_src = panel_config->dpi_clk_src;
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if (dpi_clk_src == 0) {
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dpi_clk_src = MIPI_DSI_DPI_CLK_SRC_DEFAULT;
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}
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// get the clock source frequency
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uint32_t dpi_clk_src_freq_hz = 0;
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ESP_GOTO_ON_ERROR(esp_clk_tree_src_get_freq_hz(dpi_clk_src, ESP_CLK_TREE_SRC_FREQ_PRECISION_CACHED,
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&dpi_clk_src_freq_hz), err, TAG, "get clock source frequency failed");
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// divide the source clock to get the final DPI clock
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uint32_t dpi_div = mipi_dsi_hal_host_dpi_calculate_divider(hal, dpi_clk_src_freq_hz / 1000 / 1000, panel_config->dpi_clock_freq_mhz);
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// set the clock source, set the divider, and enable the dpi clock
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DSI_CLOCK_SRC_ATOMIC() {
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mipi_dsi_ll_set_dpi_clock_source(bus_id, dpi_clk_src);
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mipi_dsi_ll_set_dpi_clock_div(bus_id, dpi_div);
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mipi_dsi_ll_enable_dpi_clock(bus_id, true);
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}
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// create DMA resources
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ESP_GOTO_ON_ERROR(dpi_panel_create_dma_link(dpi_panel), err, TAG, "initialize DMA link failed");
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mipi_dsi_host_ll_dpi_set_vcid(hal->host, panel_config->virtual_channel);
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mipi_dsi_hal_host_dpi_set_color_coding(hal, panel_config->pixel_format, 0);
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// these signals define how the DPI interface interacts with the controller
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mipi_dsi_host_ll_dpi_set_timing_polarity(hal->host, false, false, false, false, false);
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// configure the low-power transitions: defines the video periods which are permitted to goto low-power if the time available to do so
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mipi_dsi_host_ll_dpi_enable_lp_horizontal_timing(hal->host, true, true);
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mipi_dsi_host_ll_dpi_enable_lp_vertical_timing(hal->host, true, true, true, true);
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// after sending a frame, the DSI device should return an ack
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mipi_dsi_host_ll_dpi_enable_frame_ack(hal->host, true);
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// commands are transmitted in low-power mode
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mipi_dsi_host_ll_dpi_enable_lp_command(hal->host, true);
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// using the burst mode because it's energy-efficient
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mipi_dsi_host_ll_dpi_set_video_burst_type(hal->host, MIPI_DSI_LL_VIDEO_BURST_WITH_SYNC_PULSES);
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// configure the size of the active lin period, measured in pixels
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mipi_dsi_host_ll_dpi_set_video_packet_pixel_num(hal->host, panel_config->video_timing.h_size);
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// disable multi-packets
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mipi_dsi_host_ll_dpi_set_trunks_num(hal->host, 0);
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// disable "null packets"
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mipi_dsi_host_ll_dpi_set_null_packet_size(hal->host, 0);
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// set horizontal and vertical timing configuration
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mipi_dsi_hal_host_dpi_set_horizontal_timing(hal, panel_config->video_timing.hsync_pulse_width,
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panel_config->video_timing.hsync_back_porch,
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panel_config->video_timing.h_size,
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panel_config->video_timing.hsync_front_porch);
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mipi_dsi_hal_host_dpi_set_vertical_timing(hal, panel_config->video_timing.vsync_pulse_width,
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panel_config->video_timing.vsync_back_porch,
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panel_config->video_timing.v_size,
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panel_config->video_timing.vsync_front_porch);
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mipi_dsi_brg_ll_set_num_pixel_bits(hal->bridge, panel_config->video_timing.h_size * panel_config->video_timing.v_size * 16);
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mipi_dsi_brg_ll_set_underrun_discard_count(hal->bridge, panel_config->video_timing.h_size);
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// let the DSI bridge as the DMA flow controller
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mipi_dsi_brg_ll_set_flow_controller(hal->bridge, MIPI_DSI_LL_FLOW_CONTROLLER_BRIDGE);
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mipi_dsi_brg_ll_set_burst_len(hal->bridge, 256);
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mipi_dsi_brg_ll_set_empty_threshold(hal->bridge, 1024 - 256);
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// enable DSI bridge
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mipi_dsi_brg_ll_enable(hal->bridge, true);
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mipi_dsi_brg_ll_update_dpi_config(hal->bridge);
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dpi_panel->base.del = dpi_panel_del;
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dpi_panel->base.init = dpi_panel_init;
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dpi_panel->base.draw_bitmap = dpi_panel_draw_bitmap;
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*ret_panel = &dpi_panel->base;
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ESP_LOGD(TAG, "new dpi panel @%p, fb@%p", dpi_panel, dpi_panel->frame_buffer);
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return ESP_OK;
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err:
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if (dpi_panel) {
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dpi_panel_del(&dpi_panel->base);
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}
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return ret;
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}
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static esp_err_t dpi_panel_del(esp_lcd_panel_t *panel)
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{
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esp_lcd_dpi_panel_t *dpi_panel = __containerof(panel, esp_lcd_dpi_panel_t, base);
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esp_lcd_dsi_bus_handle_t bus = dpi_panel->bus;
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int bus_id = bus->bus_id;
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mipi_dsi_hal_context_t *hal = &bus->hal;
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// disable the DPI clock
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DSI_CLOCK_SRC_ATOMIC() {
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mipi_dsi_ll_enable_dpi_clock(bus_id, false);
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}
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// disable the DSI bridge
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mipi_dsi_brg_ll_enable(hal->bridge, false);
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// free memory
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if (dpi_panel->dma_chan) {
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dw_gdma_del_channel(dpi_panel->dma_chan);
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}
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if (dpi_panel->frame_buffer) {
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free(dpi_panel->frame_buffer);
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}
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if (dpi_panel->link_list) {
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dw_gdma_del_link_list(dpi_panel->link_list);
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}
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if (dpi_panel->fbcpy_handle) {
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esp_async_fbcpy_uninstall(dpi_panel->fbcpy_handle);
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}
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if (dpi_panel->draw_sem) {
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vSemaphoreDelete(dpi_panel->draw_sem);
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}
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free(dpi_panel);
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return ESP_OK;
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}
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static esp_err_t dpi_panel_init(esp_lcd_panel_t *panel)
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{
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esp_lcd_dpi_panel_t *dpi_panel = __containerof(panel, esp_lcd_dpi_panel_t, base);
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esp_lcd_dsi_bus_handle_t bus = dpi_panel->bus;
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mipi_dsi_hal_context_t *hal = &bus->hal;
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dw_gdma_channel_handle_t dma_chan = dpi_panel->dma_chan;
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dw_gdma_link_list_handle_t link_list = dpi_panel->link_list;
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ESP_RETURN_ON_ERROR(dw_gdma_channel_use_link_list(dma_chan, link_list), TAG, "use DMA link list failed");
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dw_gdma_block_transfer_config_t dma_transfer_config = {
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.src = {
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.addr = (uint32_t)(dpi_panel->frame_buffer),
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.burst_mode = DW_GDMA_BURST_MODE_INCREMENT,
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.burst_items = DW_GDMA_BURST_ITEMS_512,
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.burst_len = 16,
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.width = DW_GDMA_TRANS_WIDTH_64,
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},
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.dst = {
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.addr = MIPI_DSI_BRG_MEM_BASE,
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.burst_mode = DW_GDMA_BURST_MODE_FIXED,
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.burst_items = DW_GDMA_BURST_ITEMS_256,
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.burst_len = 16,
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.width = DW_GDMA_TRANS_WIDTH_64,
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},
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.size = dpi_panel->frame_buffer_size * 8 / 64,
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};
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dw_gdma_lli_config_transfer(dw_gdma_link_list_get_item(link_list, 0), &dma_transfer_config);
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dw_gdma_block_markers_t markers = {
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.is_valid = true,
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};
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dw_gdma_lli_set_block_markers(dw_gdma_link_list_get_item(link_list, 0), markers);
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dw_gdma_channel_enable_ctrl(dma_chan, true);
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// enable the video mode
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mipi_dsi_host_ll_enable_video_mode(hal->host, true);
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// switch the clock lane to high speed mode
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mipi_dsi_host_ll_set_clock_lane_state(hal->host, MIPI_DSI_LL_CLOCK_LANE_STATE_AUTO);
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// enable the DPI output of the DSI bridge
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mipi_dsi_brg_ll_enable_dpi_output(hal->bridge, true);
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mipi_dsi_brg_ll_update_dpi_config(hal->bridge);
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return ESP_OK;
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}
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static esp_err_t dpi_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data)
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{
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esp_lcd_dpi_panel_t *dpi_panel = __containerof(panel, esp_lcd_dpi_panel_t, base);
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uint8_t *frame_buffer = dpi_panel->frame_buffer;
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size_t frame_buffer_size = dpi_panel->frame_buffer_size;
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if (!dpi_panel->fbcpy_handle) {
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size_t bytes_per_pixel = dpi_panel->bytes_per_pixel;
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const uint8_t *from = (const uint8_t *)color_data;
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uint8_t *to = frame_buffer + (y_start * dpi_panel->h_pixels + x_start) * bytes_per_pixel;
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uint32_t copy_bytes_per_line = (x_end - x_start) * bytes_per_pixel;
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|
uint32_t bytes_per_line = bytes_per_pixel * dpi_panel->h_pixels;
|
|
for (int y = y_start; y < y_end; y++) {
|
|
memcpy(to, from, copy_bytes_per_line);
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|
to += bytes_per_line;
|
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from += copy_bytes_per_line;
|
|
}
|
|
ESP_RETURN_ON_ERROR(esp_cache_msync(frame_buffer, frame_buffer_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M), TAG, "cache write back failed");
|
|
// invoke the trans done callback
|
|
if (dpi_panel->on_color_trans_done) {
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|
dpi_panel->on_color_trans_done(&dpi_panel->base, NULL, dpi_panel->user_ctx);
|
|
}
|
|
} else {
|
|
// endure the previous draw operation has finish
|
|
ESP_RETURN_ON_FALSE(xSemaphoreTake(dpi_panel->draw_sem, 0) == pdTRUE, ESP_ERR_INVALID_STATE, TAG, "previous draw operation is not finished");
|
|
|
|
// write back the user's draw buffer, so that the DMA can see the correct data
|
|
size_t color_data_size = (x_end - x_start) * (y_end - y_start) * dpi_panel->bytes_per_pixel;
|
|
esp_cache_msync((void*)color_data, color_data_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
|
|
|
|
esp_async_fbcpy_trans_desc_t fbcpy_trans_config = {
|
|
.src_buffer = color_data,
|
|
.dst_buffer = dpi_panel->frame_buffer,
|
|
.src_buffer_size_x = x_end - x_start,
|
|
.src_buffer_size_y = y_end - y_start,
|
|
.dst_buffer_size_x = dpi_panel->h_pixels,
|
|
.dst_buffer_size_y = dpi_panel->v_pixels,
|
|
.src_offset_x = 0,
|
|
.src_offset_y = 0,
|
|
.dst_offset_x = x_start,
|
|
.dst_offset_y = y_start,
|
|
.copy_size_x = x_end - x_start,
|
|
.copy_size_y = y_end - y_start,
|
|
.pixel_format_unique_id = {
|
|
.color_space = COLOR_SPACE_RGB,
|
|
.pixel_format = dpi_panel->pixel_format,
|
|
},
|
|
};
|
|
ESP_RETURN_ON_ERROR(esp_async_fbcpy(dpi_panel->fbcpy_handle, &fbcpy_trans_config, async_fbcpy_done_cb, dpi_panel), TAG, "async memcpy failed");
|
|
}
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t esp_lcd_dpi_panel_set_pattern(esp_lcd_panel_handle_t panel, mipi_dsi_pattern_type_t pattern)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_lcd_dpi_panel_t *dpi_panel = __containerof(panel, esp_lcd_dpi_panel_t, base);
|
|
esp_lcd_dsi_bus_handle_t bus = dpi_panel->bus;
|
|
mipi_dsi_hal_context_t *hal = &bus->hal;
|
|
|
|
if (pattern != MIPI_DSI_PATTERN_NONE) {
|
|
// stop the DSI bridge from generating the DPI stream
|
|
mipi_dsi_brg_ll_enable_dpi_output(hal->bridge, false);
|
|
mipi_dsi_brg_ll_update_dpi_config(hal->bridge);
|
|
}
|
|
|
|
// set the pattern type and enable the pattern generator for the DSI host controller
|
|
mipi_dsi_host_ll_dpi_set_pattern_type(hal->host, pattern);
|
|
|
|
if (pattern == MIPI_DSI_PATTERN_NONE) {
|
|
// reenable the DSI bridge to generate the DPI stream
|
|
mipi_dsi_brg_ll_enable_dpi_output(hal->bridge, true);
|
|
mipi_dsi_brg_ll_update_dpi_config(hal->bridge);
|
|
}
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t esp_lcd_dpi_panel_register_event_callbacks(esp_lcd_panel_handle_t panel, const esp_lcd_dpi_panel_event_callbacks_t *cbs, void *user_ctx)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel && cbs, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_lcd_dpi_panel_t *dpi_panel = __containerof(panel, esp_lcd_dpi_panel_t, base);
|
|
dpi_panel->on_color_trans_done = cbs->on_color_trans_done;
|
|
dpi_panel->user_ctx = user_ctx;
|
|
|
|
return ESP_OK;
|
|
}
|