mirror of
https://github.com/espressif/esp-idf.git
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1149 lines
54 KiB
C
1149 lines
54 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2024 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 <stdlib.h>
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#include <stdarg.h>
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <string.h>
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#include "sdkconfig.h"
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#if CONFIG_LCD_ENABLE_DEBUG_LOG
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// The local log level must be defined before including esp_log.h
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// Set the maximum log level for this source file
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#define LOG_LOCAL_LEVEL ESP_LOG_DEBUG
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#endif
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_attr.h"
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#include "esp_check.h"
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#include "esp_pm.h"
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#include "esp_lcd_panel_interface.h"
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#include "esp_lcd_panel_rgb.h"
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#include "esp_lcd_panel_ops.h"
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#include "esp_rom_gpio.h"
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#include "soc/soc_caps.h"
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#include "esp_clk_tree.h"
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#include "hal/dma_types.h"
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#include "driver/gpio.h"
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#include "esp_bit_defs.h"
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#include "esp_private/esp_clk_tree_common.h"
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#include "esp_private/gdma.h"
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#include "esp_private/gdma_link.h"
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#include "esp_private/periph_ctrl.h"
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#include "esp_private/gpio.h"
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#include "esp_psram.h"
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#include "esp_lcd_common.h"
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#include "esp_cache.h"
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#include "esp_memory_utils.h"
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#include "soc/lcd_periph.h"
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#include "soc/io_mux_reg.h"
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#include "hal/lcd_hal.h"
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#include "hal/lcd_ll.h"
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#include "hal/cache_hal.h"
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#include "hal/cache_ll.h"
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#include "rgb_lcd_rotation_sw.h"
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// hardware issue workaround
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#if CONFIG_IDF_TARGET_ESP32S3
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#define RGB_LCD_NEEDS_SEPARATE_RESTART_LINK 1
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#endif
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#if CONFIG_LCD_RGB_ISR_IRAM_SAFE
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#define LCD_RGB_INTR_ALLOC_FLAGS (ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_INTRDISABLED)
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#define LCD_RGB_MEM_ALLOC_CAPS (MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT)
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#else
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#define LCD_RGB_INTR_ALLOC_FLAGS ESP_INTR_FLAG_INTRDISABLED
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#define LCD_RGB_MEM_ALLOC_CAPS MALLOC_CAP_DEFAULT
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#endif
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#if defined(SOC_GDMA_TRIG_PERIPH_LCD0_BUS) && (SOC_GDMA_TRIG_PERIPH_LCD0_BUS == SOC_GDMA_BUS_AHB)
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#define LCD_GDMA_NEW_CHANNEL gdma_new_ahb_channel
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#define LCD_GDMA_DESCRIPTOR_ALIGN 4
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#elif defined(SOC_GDMA_TRIG_PERIPH_LCD0_BUS) && (SOC_GDMA_TRIG_PERIPH_LCD0_BUS == SOC_GDMA_BUS_AXI)
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#define LCD_GDMA_NEW_CHANNEL gdma_new_axi_channel
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#define LCD_GDMA_DESCRIPTOR_ALIGN 8
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#else
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#error "Unsupported GDMA bus type for RGB LCD"
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#endif
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#define RGB_LCD_PANEL_MAX_FB_NUM 3 // maximum supported frame buffer number
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#define RGB_LCD_PANEL_BOUNCE_BUF_NUM 2 // bounce buffer number
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static const char *TAG = "lcd_panel.rgb";
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typedef struct esp_rgb_panel_t esp_rgb_panel_t;
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static esp_err_t rgb_panel_del(esp_lcd_panel_t *panel);
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static esp_err_t rgb_panel_reset(esp_lcd_panel_t *panel);
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static esp_err_t rgb_panel_init(esp_lcd_panel_t *panel);
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static esp_err_t rgb_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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static esp_err_t rgb_panel_invert_color(esp_lcd_panel_t *panel, bool invert_color_data);
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static esp_err_t rgb_panel_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y);
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static esp_err_t rgb_panel_swap_xy(esp_lcd_panel_t *panel, bool swap_axes);
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static esp_err_t rgb_panel_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap);
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static esp_err_t rgb_panel_disp_on_off(esp_lcd_panel_t *panel, bool off);
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static esp_err_t lcd_rgb_panel_select_clock_src(esp_rgb_panel_t *rgb_panel, lcd_clock_source_t clk_src);
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static esp_err_t lcd_rgb_create_dma_channel(esp_rgb_panel_t *rgb_panel);
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static esp_err_t lcd_rgb_panel_init_trans_link(esp_rgb_panel_t *rgb_panel);
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static esp_err_t lcd_rgb_panel_configure_gpio(esp_rgb_panel_t *rgb_panel, const esp_lcd_rgb_panel_config_t *panel_config);
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static void lcd_rgb_panel_start_transmission(esp_rgb_panel_t *rgb_panel);
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static void rgb_lcd_default_isr_handler(void *args);
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struct esp_rgb_panel_t {
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esp_lcd_panel_t base; // Base class of generic lcd panel
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int panel_id; // LCD panel ID
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lcd_hal_context_t hal; // Hal layer object
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size_t data_width; // Number of data lines
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size_t fb_bits_per_pixel; // Frame buffer color depth, in bpp
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size_t num_fbs; // Number of frame buffers
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size_t output_bits_per_pixel; // Color depth seen from the output data line. Default to fb_bits_per_pixel, but can be changed by YUV-RGB conversion
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size_t dma_burst_size; // DMA transfer burst size
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int disp_gpio_num; // Display control GPIO, which is used to perform action like "disp_off"
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intr_handle_t intr; // LCD peripheral interrupt handle
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esp_pm_lock_handle_t pm_lock; // Power management lock
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size_t num_dma_nodes; // Number of DMA descriptors that used to carry the frame buffer
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gdma_channel_handle_t dma_chan; // DMA channel handle
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gdma_link_list_handle_t dma_fb_links[RGB_LCD_PANEL_MAX_FB_NUM]; // DMA link lists for multiple frame buffers
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gdma_link_list_handle_t dma_bb_link; // DMA link list for bounce buffer
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#if RGB_LCD_NEEDS_SEPARATE_RESTART_LINK
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gdma_link_list_handle_t dma_restart_link; // DMA link list for restarting the DMA
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#endif
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uint8_t *fbs[RGB_LCD_PANEL_MAX_FB_NUM]; // Frame buffers
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uint8_t *bounce_buffer[RGB_LCD_PANEL_BOUNCE_BUF_NUM]; // Pointer to the bounce buffers
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size_t fb_size; // Size of frame buffer, in bytes
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size_t bb_size; // Size of the bounce buffer, in bytes. If not-zero, the driver uses two bounce buffers allocated from internal memory
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uint8_t cur_fb_index; // Current frame buffer index
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uint8_t bb_fb_index; // Current frame buffer index which used by bounce buffer
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size_t int_mem_align; // DMA buffer alignment for internal memory
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size_t ext_mem_align; // DMA buffer alignment for external memory
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int data_gpio_nums[SOC_LCDCAM_RGB_DATA_WIDTH]; // GPIOs used for data lines, we keep these GPIOs for action like "invert_color"
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uint32_t src_clk_hz; // Peripheral source clock resolution
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esp_lcd_rgb_timing_t timings; // RGB timing parameters (e.g. pclk, sync pulse, porch width)
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int bounce_pos_px; // Position in whatever source material is used for the bounce buffer, in pixels
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size_t bb_eof_count; // record the number we received the DMA EOF event, compare with `expect_eof_count` in the VSYNC_END ISR
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size_t expect_eof_count; // record the number of DMA EOF event we expected to receive
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esp_lcd_rgb_panel_draw_buf_complete_cb_t on_color_trans_done; // draw buffer completes
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esp_lcd_rgb_panel_frame_buf_complete_cb_t on_frame_buf_complete; // callback used to notify when the bounce buffer finish copying the entire frame
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esp_lcd_rgb_panel_vsync_cb_t on_vsync; // VSYNC event callback
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esp_lcd_rgb_panel_bounce_buf_fill_cb_t on_bounce_empty; // callback used to fill a bounce buffer rather than copying from the frame buffer
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void *user_ctx; // Reserved user's data of callback functions
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int x_gap; // Extra gap in x coordinate, it's used when calculate the flush window
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int y_gap; // Extra gap in y coordinate, it's used when calculate the flush window
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portMUX_TYPE spinlock; // to protect panel specific resource from concurrent access (e.g. between task and ISR)
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int rotate_mask; // panel rotate_mask mask, Or'ed of `panel_rotate_mask_t`
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struct {
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uint32_t disp_en_level: 1; // The level which can turn on the screen by `disp_gpio_num`
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uint32_t stream_mode: 1; // If set, the LCD transfers data continuously, otherwise, it stops refreshing the LCD when transaction done
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uint32_t fb_in_psram: 1; // Whether the frame buffer is in PSRAM
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uint32_t need_update_pclk: 1; // Whether to update the PCLK before start a new transaction
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uint32_t need_restart: 1; // Whether to restart the LCD controller and the DMA
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uint32_t fb_behind_cache: 1; // Whether the frame buffer is behind the cache
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uint32_t bb_behind_cache: 1; // Whether the bounce buffer is behind the cache
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} flags;
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};
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static esp_err_t lcd_rgb_panel_alloc_frame_buffers(esp_rgb_panel_t *rgb_panel)
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{
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bool fb_in_psram = rgb_panel->flags.fb_in_psram;
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// read the cache line size of internal and external memory, we use this information to check if the allocated memory is behind the cache
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uint32_t int_mem_cache_line_size = cache_hal_get_cache_line_size(CACHE_LL_LEVEL_INT_MEM, CACHE_TYPE_DATA);
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uint32_t ext_mem_cache_line_size = cache_hal_get_cache_line_size(CACHE_LL_LEVEL_EXT_MEM, CACHE_TYPE_DATA);
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// alloc frame buffer
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for (int i = 0; i < rgb_panel->num_fbs; i++) {
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if (fb_in_psram) {
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// the allocated buffer is also aligned to the cache line size
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rgb_panel->fbs[i] = heap_caps_aligned_calloc(rgb_panel->ext_mem_align, 1, rgb_panel->fb_size,
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MALLOC_CAP_SPIRAM | MALLOC_CAP_DMA | MALLOC_CAP_8BIT);
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ESP_RETURN_ON_FALSE(rgb_panel->fbs[i], ESP_ERR_NO_MEM, TAG, "no mem for frame buffer");
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rgb_panel->flags.fb_behind_cache = ext_mem_cache_line_size > 0;
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} else {
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rgb_panel->fbs[i] = heap_caps_aligned_calloc(rgb_panel->int_mem_align, 1, rgb_panel->fb_size,
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MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA | MALLOC_CAP_8BIT);
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ESP_RETURN_ON_FALSE(rgb_panel->fbs[i], ESP_ERR_NO_MEM, TAG, "no mem for frame buffer");
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rgb_panel->flags.fb_behind_cache = int_mem_cache_line_size > 0;
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}
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// flush data from cache to the physical memory
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if (rgb_panel->flags.fb_behind_cache) {
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esp_cache_msync(rgb_panel->fbs[i], rgb_panel->fb_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
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}
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}
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// alloc bounce buffer
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if (rgb_panel->bb_size) {
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for (int i = 0; i < RGB_LCD_PANEL_BOUNCE_BUF_NUM; i++) {
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// bounce buffer must be allocated from internal memory for performance
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rgb_panel->bounce_buffer[i] = heap_caps_aligned_calloc(rgb_panel->int_mem_align, 1, rgb_panel->bb_size,
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MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA | MALLOC_CAP_8BIT);
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ESP_RETURN_ON_FALSE(rgb_panel->bounce_buffer[i], ESP_ERR_NO_MEM, TAG, "no mem for bounce buffer");
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if (int_mem_cache_line_size > 0) {
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// flush data from cache to the physical memory
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esp_cache_msync(rgb_panel->bounce_buffer[i], rgb_panel->bb_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
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rgb_panel->flags.bb_behind_cache = true;
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}
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}
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}
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rgb_panel->cur_fb_index = 0;
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rgb_panel->bb_fb_index = 0;
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return ESP_OK;
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}
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static esp_err_t lcd_rgb_panel_destroy(esp_rgb_panel_t *rgb_panel)
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{
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LCD_CLOCK_SRC_ATOMIC() {
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lcd_ll_enable_clock(rgb_panel->hal.dev, false);
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}
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if (rgb_panel->panel_id >= 0) {
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PERIPH_RCC_RELEASE_ATOMIC(lcd_periph_rgb_signals.panels[rgb_panel->panel_id].module, ref_count) {
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if (ref_count == 0) {
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lcd_ll_enable_bus_clock(rgb_panel->panel_id, false);
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}
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}
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lcd_com_remove_device(LCD_COM_DEVICE_TYPE_RGB, rgb_panel->panel_id);
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}
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if (rgb_panel->dma_chan) {
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gdma_disconnect(rgb_panel->dma_chan);
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gdma_del_channel(rgb_panel->dma_chan);
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}
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for (size_t i = 0; i < RGB_LCD_PANEL_MAX_FB_NUM; i++) {
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if (rgb_panel->fbs[i]) {
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free(rgb_panel->fbs[i]);
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}
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if (rgb_panel->dma_fb_links[i]) {
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gdma_del_link_list(rgb_panel->dma_fb_links[i]);
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}
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}
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for (int i = 0; i < RGB_LCD_PANEL_BOUNCE_BUF_NUM; i++) {
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if (rgb_panel->bounce_buffer[i]) {
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free(rgb_panel->bounce_buffer[i]);
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}
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}
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if (rgb_panel->dma_bb_link) {
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gdma_del_link_list(rgb_panel->dma_bb_link);
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}
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#if RGB_LCD_NEEDS_SEPARATE_RESTART_LINK
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if (rgb_panel->dma_restart_link) {
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gdma_del_link_list(rgb_panel->dma_restart_link);
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}
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#endif
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if (rgb_panel->intr) {
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esp_intr_free(rgb_panel->intr);
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}
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if (rgb_panel->pm_lock) {
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esp_pm_lock_release(rgb_panel->pm_lock);
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esp_pm_lock_delete(rgb_panel->pm_lock);
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}
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free(rgb_panel);
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return ESP_OK;
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}
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esp_err_t esp_lcd_new_rgb_panel(const esp_lcd_rgb_panel_config_t *rgb_panel_config, esp_lcd_panel_handle_t *ret_panel)
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{
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#if CONFIG_LCD_ENABLE_DEBUG_LOG
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esp_log_level_set(TAG, ESP_LOG_DEBUG);
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#endif
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esp_err_t ret = ESP_OK;
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esp_rgb_panel_t *rgb_panel = NULL;
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ESP_RETURN_ON_FALSE(rgb_panel_config && ret_panel, ESP_ERR_INVALID_ARG, TAG, "invalid parameter");
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size_t data_width = rgb_panel_config->data_width;
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ESP_RETURN_ON_FALSE((data_width > 0) && (data_width <= SOC_LCDCAM_RGB_DATA_WIDTH) && ((data_width % 8) == 0), ESP_ERR_INVALID_ARG,
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TAG, "unsupported data width %d", data_width);
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ESP_RETURN_ON_FALSE(!(rgb_panel_config->flags.double_fb && rgb_panel_config->flags.no_fb),
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ESP_ERR_INVALID_ARG, TAG, "double_fb conflicts with no_fb");
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ESP_RETURN_ON_FALSE(!(rgb_panel_config->num_fbs > 0 && rgb_panel_config->num_fbs != 2 && rgb_panel_config->flags.double_fb),
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ESP_ERR_INVALID_ARG, TAG, "num_fbs conflicts with double_fb");
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ESP_RETURN_ON_FALSE(!(rgb_panel_config->num_fbs > 0 && rgb_panel_config->flags.no_fb),
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ESP_ERR_INVALID_ARG, TAG, "num_fbs conflicts with no_fb");
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ESP_RETURN_ON_FALSE(!(rgb_panel_config->flags.no_fb && rgb_panel_config->bounce_buffer_size_px == 0),
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ESP_ERR_INVALID_ARG, TAG, "must set bounce buffer if there's no frame buffer");
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// determine number of framebuffers
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size_t num_fbs = 1;
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if (rgb_panel_config->flags.no_fb) {
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num_fbs = 0;
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} else if (rgb_panel_config->flags.double_fb) {
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num_fbs = 2;
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} else if (rgb_panel_config->num_fbs > 0) {
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num_fbs = rgb_panel_config->num_fbs;
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}
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ESP_RETURN_ON_FALSE(num_fbs <= RGB_LCD_PANEL_MAX_FB_NUM, ESP_ERR_INVALID_ARG, TAG, "too many frame buffers");
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// bpp defaults to the number of data lines, but for serial RGB interface, they're not equal
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// e.g. for serial RGB 8-bit interface, data lines are 8, whereas the bpp is 24 (RGB888)
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size_t fb_bits_per_pixel = data_width;
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if (rgb_panel_config->bits_per_pixel) { // override bpp if it's set
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fb_bits_per_pixel = rgb_panel_config->bits_per_pixel;
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}
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// calculate buffer size
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size_t fb_size = rgb_panel_config->timings.h_res * rgb_panel_config->timings.v_res * fb_bits_per_pixel / 8;
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size_t bb_size = rgb_panel_config->bounce_buffer_size_px * fb_bits_per_pixel / 8;
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size_t expect_bb_eof_count = 0;
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if (bb_size) {
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ESP_RETURN_ON_FALSE(fb_size % bb_size == 0, ESP_ERR_INVALID_ARG, TAG, "frame buffer size must be multiple of bounce buffer size");
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expect_bb_eof_count = fb_size / bb_size;
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}
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// calculate the number of DMA descriptors
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size_t num_dma_nodes = 0;
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// allocate memory for rgb panel
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rgb_panel = heap_caps_calloc(1, sizeof(esp_rgb_panel_t), LCD_RGB_MEM_ALLOC_CAPS);
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ESP_GOTO_ON_FALSE(rgb_panel, ESP_ERR_NO_MEM, err, TAG, "no mem for rgb panel");
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rgb_panel->panel_id = -1;
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rgb_panel->num_dma_nodes = num_dma_nodes;
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rgb_panel->num_fbs = num_fbs;
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rgb_panel->fb_size = fb_size;
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rgb_panel->bb_size = bb_size;
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rgb_panel->fb_bits_per_pixel = fb_bits_per_pixel;
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rgb_panel->expect_eof_count = expect_bb_eof_count;
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// register to platform
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int panel_id = lcd_com_register_device(LCD_COM_DEVICE_TYPE_RGB, rgb_panel);
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ESP_GOTO_ON_FALSE(panel_id >= 0, ESP_ERR_NOT_FOUND, err, TAG, "no free rgb panel slot");
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rgb_panel->panel_id = panel_id;
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// enable APB to access LCD registers
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PERIPH_RCC_ACQUIRE_ATOMIC(lcd_periph_rgb_signals.panels[panel_id].module, ref_count) {
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if (ref_count == 0) {
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lcd_ll_enable_bus_clock(panel_id, true);
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lcd_ll_reset_register(panel_id);
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}
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}
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// initialize HAL layer, so we can call LL APIs later
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lcd_hal_init(&rgb_panel->hal, panel_id);
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// enable clock
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LCD_CLOCK_SRC_ATOMIC() {
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lcd_ll_enable_clock(rgb_panel->hal.dev, true);
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}
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// set clock source
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ret = lcd_rgb_panel_select_clock_src(rgb_panel, rgb_panel_config->clk_src);
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ESP_GOTO_ON_ERROR(ret, err, TAG, "set source clock failed");
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// reset peripheral and FIFO after we select a correct clock source
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lcd_ll_fifo_reset(rgb_panel->hal.dev);
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lcd_ll_reset(rgb_panel->hal.dev);
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// install interrupt service, (LCD peripheral shares the interrupt source with Camera by different mask)
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int isr_flags = LCD_RGB_INTR_ALLOC_FLAGS | ESP_INTR_FLAG_SHARED | ESP_INTR_FLAG_LOWMED;
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ret = esp_intr_alloc_intrstatus(lcd_periph_rgb_signals.panels[panel_id].irq_id, isr_flags,
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(uint32_t)lcd_ll_get_interrupt_status_reg(rgb_panel->hal.dev),
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LCD_LL_EVENT_VSYNC_END, rgb_lcd_default_isr_handler, rgb_panel, &rgb_panel->intr);
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ESP_GOTO_ON_ERROR(ret, err, TAG, "install interrupt failed");
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lcd_ll_enable_interrupt(rgb_panel->hal.dev, LCD_LL_EVENT_VSYNC_END, false); // disable all interrupts
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lcd_ll_clear_interrupt_status(rgb_panel->hal.dev, UINT32_MAX); // clear pending interrupt
|
|
|
|
// install DMA service
|
|
rgb_panel->flags.stream_mode = !rgb_panel_config->flags.refresh_on_demand;
|
|
rgb_panel->dma_burst_size = rgb_panel_config->dma_burst_size ? rgb_panel_config->dma_burst_size : 64;
|
|
rgb_panel->flags.fb_in_psram = rgb_panel_config->flags.fb_in_psram;
|
|
ESP_GOTO_ON_ERROR(lcd_rgb_create_dma_channel(rgb_panel), err, TAG, "install DMA failed");
|
|
// allocate frame buffers + bounce buffers
|
|
ESP_GOTO_ON_ERROR(lcd_rgb_panel_alloc_frame_buffers(rgb_panel), err, TAG, "alloc frame buffers failed");
|
|
// initialize DMA descriptor link
|
|
ESP_GOTO_ON_ERROR(lcd_rgb_panel_init_trans_link(rgb_panel), err, TAG, "init DMA link failed");
|
|
|
|
// configure GPIO
|
|
ret = lcd_rgb_panel_configure_gpio(rgb_panel, rgb_panel_config);
|
|
ESP_GOTO_ON_ERROR(ret, err, TAG, "configure GPIO failed");
|
|
// fill other rgb panel runtime parameters
|
|
memcpy(rgb_panel->data_gpio_nums, rgb_panel_config->data_gpio_nums, sizeof(rgb_panel->data_gpio_nums));
|
|
rgb_panel->timings = rgb_panel_config->timings;
|
|
rgb_panel->data_width = rgb_panel_config->data_width;
|
|
rgb_panel->output_bits_per_pixel = fb_bits_per_pixel; // by default, the output bpp is the same as the frame buffer bpp
|
|
rgb_panel->disp_gpio_num = rgb_panel_config->disp_gpio_num;
|
|
rgb_panel->flags.disp_en_level = !rgb_panel_config->flags.disp_active_low;
|
|
rgb_panel->spinlock = (portMUX_TYPE)portMUX_INITIALIZER_UNLOCKED;
|
|
// fill function table
|
|
rgb_panel->base.del = rgb_panel_del;
|
|
rgb_panel->base.reset = rgb_panel_reset;
|
|
rgb_panel->base.init = rgb_panel_init;
|
|
rgb_panel->base.draw_bitmap = rgb_panel_draw_bitmap;
|
|
rgb_panel->base.disp_on_off = rgb_panel_disp_on_off;
|
|
rgb_panel->base.invert_color = rgb_panel_invert_color;
|
|
rgb_panel->base.mirror = rgb_panel_mirror;
|
|
rgb_panel->base.swap_xy = rgb_panel_swap_xy;
|
|
rgb_panel->base.set_gap = rgb_panel_set_gap;
|
|
// return base class
|
|
*ret_panel = &(rgb_panel->base);
|
|
ESP_LOGD(TAG, "new rgb panel(%d) @%p, num_fbs=%zu, fb_size=%zu, bb0 @%p, bb1 @%p, bb_size=%zu",
|
|
rgb_panel->panel_id, rgb_panel, rgb_panel->num_fbs, rgb_panel->fb_size,
|
|
rgb_panel->bounce_buffer[0], rgb_panel->bounce_buffer[1], rgb_panel->bb_size);
|
|
for (size_t i = 0; i < rgb_panel->num_fbs; i++) {
|
|
ESP_LOGD(TAG, "fb[%zu] @%p", i, rgb_panel->fbs[i]);
|
|
}
|
|
return ESP_OK;
|
|
|
|
err:
|
|
if (rgb_panel) {
|
|
lcd_rgb_panel_destroy(rgb_panel);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
esp_err_t esp_lcd_rgb_panel_register_event_callbacks(esp_lcd_panel_handle_t panel, const esp_lcd_rgb_panel_event_callbacks_t *callbacks, void *user_ctx)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel && callbacks, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
#if CONFIG_LCD_RGB_ISR_IRAM_SAFE
|
|
if (callbacks->on_vsync) {
|
|
ESP_RETURN_ON_FALSE(esp_ptr_in_iram(callbacks->on_vsync), ESP_ERR_INVALID_ARG, TAG, "on_vsync callback not in IRAM");
|
|
}
|
|
if (callbacks->on_color_trans_done) {
|
|
ESP_RETURN_ON_FALSE(esp_ptr_in_iram(callbacks->on_color_trans_done), ESP_ERR_INVALID_ARG, TAG, "on_color_trans_done callback not in IRAM");
|
|
}
|
|
if (callbacks->on_frame_buf_complete) {
|
|
ESP_RETURN_ON_FALSE(esp_ptr_in_iram(callbacks->on_frame_buf_complete), ESP_ERR_INVALID_ARG, TAG, "on_frame_buf_complete callback not in IRAM");
|
|
}
|
|
if (callbacks->on_bounce_empty) {
|
|
ESP_RETURN_ON_FALSE(esp_ptr_in_iram(callbacks->on_bounce_empty), ESP_ERR_INVALID_ARG, TAG, "on_bounce_empty callback not in IRAM");
|
|
}
|
|
if (user_ctx) {
|
|
ESP_RETURN_ON_FALSE(esp_ptr_internal(user_ctx), ESP_ERR_INVALID_ARG, TAG, "user context not in internal RAM");
|
|
}
|
|
#endif // CONFIG_LCD_RGB_ISR_IRAM_SAFE
|
|
rgb_panel->on_vsync = callbacks->on_vsync;
|
|
rgb_panel->on_color_trans_done = callbacks->on_color_trans_done;
|
|
rgb_panel->on_frame_buf_complete = callbacks->on_frame_buf_complete;
|
|
rgb_panel->on_bounce_empty = callbacks->on_bounce_empty;
|
|
rgb_panel->user_ctx = user_ctx;
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t esp_lcd_rgb_panel_set_pclk(esp_lcd_panel_handle_t panel, uint32_t freq_hz)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
// the pclk frequency will be updated in the `LCD_LL_EVENT_VSYNC_END` event handler
|
|
portENTER_CRITICAL(&rgb_panel->spinlock);
|
|
rgb_panel->flags.need_update_pclk = true;
|
|
rgb_panel->timings.pclk_hz = freq_hz;
|
|
portEXIT_CRITICAL(&rgb_panel->spinlock);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t esp_lcd_rgb_panel_restart(esp_lcd_panel_handle_t panel)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
ESP_RETURN_ON_FALSE(rgb_panel->flags.stream_mode, ESP_ERR_INVALID_STATE, TAG, "not in stream mode");
|
|
|
|
// the underlying restart job will be done in the `LCD_LL_EVENT_VSYNC_END` event handler
|
|
portENTER_CRITICAL(&rgb_panel->spinlock);
|
|
rgb_panel->flags.need_restart = true;
|
|
portEXIT_CRITICAL(&rgb_panel->spinlock);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t esp_lcd_rgb_panel_get_frame_buffer(esp_lcd_panel_handle_t panel, uint32_t fb_num, void **fb0, ...)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
ESP_RETURN_ON_FALSE(fb_num && fb_num <= rgb_panel->num_fbs, ESP_ERR_INVALID_ARG, TAG, "invalid frame buffer number");
|
|
void **fb_itor = fb0;
|
|
va_list args;
|
|
va_start(args, fb0);
|
|
for (int i = 0; i < fb_num; i++) {
|
|
if (fb_itor) {
|
|
*fb_itor = rgb_panel->fbs[i];
|
|
fb_itor = va_arg(args, void **);
|
|
}
|
|
}
|
|
va_end(args);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t esp_lcd_rgb_panel_refresh(esp_lcd_panel_handle_t panel)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
ESP_RETURN_ON_FALSE(!rgb_panel->flags.stream_mode, ESP_ERR_INVALID_STATE, TAG, "refresh on demand is not enabled");
|
|
lcd_rgb_panel_start_transmission(rgb_panel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t esp_lcd_rgb_panel_set_yuv_conversion(esp_lcd_panel_handle_t panel, const esp_lcd_yuv_conv_config_t *config)
|
|
{
|
|
ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
lcd_hal_context_t *hal = &rgb_panel->hal;
|
|
bool en_conversion = config != NULL;
|
|
|
|
// bits per pixel for different YUV sample
|
|
const uint8_t bpp_yuv[] = {
|
|
[LCD_YUV_SAMPLE_422] = 16,
|
|
[LCD_YUV_SAMPLE_420] = 12,
|
|
[LCD_YUV_SAMPLE_411] = 12,
|
|
};
|
|
|
|
if (en_conversion) {
|
|
if (memcmp(&config->src, &config->dst, sizeof(config->src)) == 0) {
|
|
ESP_RETURN_ON_FALSE(false, ESP_ERR_INVALID_ARG, TAG, "conversion source and destination are the same");
|
|
}
|
|
|
|
if (config->src.color_space == LCD_COLOR_SPACE_YUV && config->dst.color_space == LCD_COLOR_SPACE_RGB) { // YUV->RGB
|
|
lcd_ll_set_convert_mode_yuv_to_rgb(hal->dev, config->src.yuv_sample);
|
|
rgb_panel->output_bits_per_pixel = rgb_panel->fb_bits_per_pixel;
|
|
} else if (config->src.color_space == LCD_COLOR_SPACE_RGB && config->dst.color_space == LCD_COLOR_SPACE_YUV) { // RGB->YUV
|
|
lcd_ll_set_convert_mode_rgb_to_yuv(hal->dev, config->dst.yuv_sample);
|
|
rgb_panel->output_bits_per_pixel = bpp_yuv[config->dst.yuv_sample];
|
|
} else if (config->src.color_space == LCD_COLOR_SPACE_YUV && config->dst.color_space == LCD_COLOR_SPACE_YUV) { // YUV->YUV
|
|
lcd_ll_set_convert_mode_yuv_to_yuv(hal->dev, config->src.yuv_sample, config->dst.yuv_sample);
|
|
rgb_panel->output_bits_per_pixel = bpp_yuv[config->dst.yuv_sample];
|
|
} else {
|
|
ESP_RETURN_ON_FALSE(false, ESP_ERR_NOT_SUPPORTED, TAG, "unsupported conversion mode");
|
|
}
|
|
|
|
// set conversion standard
|
|
lcd_ll_set_yuv_convert_std(hal->dev, config->std);
|
|
// set conversion data width
|
|
lcd_ll_set_convert_data_width(hal->dev, rgb_panel->data_width);
|
|
// set color range
|
|
lcd_ll_set_input_color_range(hal->dev, config->src.color_range);
|
|
lcd_ll_set_output_color_range(hal->dev, config->dst.color_range);
|
|
} else {
|
|
// output bpp equals to frame buffer bpp
|
|
rgb_panel->output_bits_per_pixel = rgb_panel->fb_bits_per_pixel;
|
|
}
|
|
|
|
// enable or disable RGB-YUV conversion
|
|
lcd_ll_enable_rgb_yuv_convert(hal->dev, en_conversion);
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_del(esp_lcd_panel_t *panel)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
int panel_id = rgb_panel->panel_id;
|
|
ESP_RETURN_ON_ERROR(lcd_rgb_panel_destroy(rgb_panel), TAG, "destroy rgb panel(%d) failed", panel_id);
|
|
ESP_LOGD(TAG, "del rgb panel(%d)", panel_id);
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_reset(esp_lcd_panel_t *panel)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
lcd_ll_fifo_reset(rgb_panel->hal.dev);
|
|
lcd_ll_reset(rgb_panel->hal.dev);
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_init(esp_lcd_panel_t *panel)
|
|
{
|
|
esp_err_t ret = ESP_OK;
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
// set pixel clock frequency
|
|
hal_utils_clk_div_t lcd_clk_div = {};
|
|
rgb_panel->timings.pclk_hz = lcd_hal_cal_pclk_freq(&rgb_panel->hal, rgb_panel->src_clk_hz, rgb_panel->timings.pclk_hz, &lcd_clk_div);
|
|
LCD_CLOCK_SRC_ATOMIC() {
|
|
lcd_ll_set_group_clock_coeff(rgb_panel->hal.dev, lcd_clk_div.integer, lcd_clk_div.denominator, lcd_clk_div.numerator);
|
|
}
|
|
// pixel clock phase and polarity
|
|
lcd_ll_set_clock_idle_level(rgb_panel->hal.dev, rgb_panel->timings.flags.pclk_idle_high);
|
|
lcd_ll_set_pixel_clock_edge(rgb_panel->hal.dev, rgb_panel->timings.flags.pclk_active_neg);
|
|
// enable RGB mode and set data width
|
|
lcd_ll_enable_rgb_mode(rgb_panel->hal.dev, true);
|
|
lcd_ll_set_dma_read_stride(rgb_panel->hal.dev, rgb_panel->data_width);
|
|
// enable data phase only
|
|
lcd_ll_set_phase_cycles(rgb_panel->hal.dev, 0, 0, 1);
|
|
// number of data cycles is controlled by DMA buffer size
|
|
lcd_ll_enable_output_always_on(rgb_panel->hal.dev, true);
|
|
// configure HSYNC, VSYNC, DE signal idle state level
|
|
lcd_ll_set_idle_level(rgb_panel->hal.dev, !rgb_panel->timings.flags.hsync_idle_low,
|
|
!rgb_panel->timings.flags.vsync_idle_low, rgb_panel->timings.flags.de_idle_high);
|
|
// configure blank region timing
|
|
lcd_ll_set_blank_cycles(rgb_panel->hal.dev, 1, 1); // RGB panel always has a front and back blank (porch region)
|
|
lcd_ll_set_horizontal_timing(rgb_panel->hal.dev, rgb_panel->timings.hsync_pulse_width,
|
|
rgb_panel->timings.hsync_back_porch, rgb_panel->timings.h_res * rgb_panel->output_bits_per_pixel / rgb_panel->data_width,
|
|
rgb_panel->timings.hsync_front_porch);
|
|
lcd_ll_set_vertical_timing(rgb_panel->hal.dev, rgb_panel->timings.vsync_pulse_width,
|
|
rgb_panel->timings.vsync_back_porch, rgb_panel->timings.v_res,
|
|
rgb_panel->timings.vsync_front_porch);
|
|
// output hsync even in porch region
|
|
lcd_ll_enable_output_hsync_in_porch_region(rgb_panel->hal.dev, true);
|
|
// generate the hsync at the very beginning of line
|
|
lcd_ll_set_hsync_position(rgb_panel->hal.dev, 0);
|
|
// in stream mode, after finish one frame, the LCD controller will ask for data automatically from the DMA
|
|
// DMA should prepare the next frame data within porch region
|
|
lcd_ll_enable_auto_next_frame(rgb_panel->hal.dev, rgb_panel->flags.stream_mode);
|
|
// trigger interrupt on the end of frame
|
|
lcd_ll_enable_interrupt(rgb_panel->hal.dev, LCD_LL_EVENT_VSYNC_END, true);
|
|
// enable intr
|
|
esp_intr_enable(rgb_panel->intr);
|
|
// start transmission
|
|
if (rgb_panel->flags.stream_mode) {
|
|
lcd_rgb_panel_start_transmission(rgb_panel);
|
|
}
|
|
ESP_LOGD(TAG, "rgb panel(%d) start, pclk=%"PRIu32"Hz", rgb_panel->panel_id, rgb_panel->timings.pclk_hz);
|
|
return ret;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
ESP_RETURN_ON_FALSE(rgb_panel->num_fbs > 0, ESP_ERR_NOT_SUPPORTED, TAG, "no frame buffer installed");
|
|
esp_lcd_rgb_panel_draw_buf_complete_cb_t cb = rgb_panel->on_color_trans_done;
|
|
|
|
uint8_t *draw_buffer = (uint8_t *)color_data;
|
|
size_t fb_size = rgb_panel->fb_size;
|
|
int h_res = rgb_panel->timings.h_res;
|
|
int v_res = rgb_panel->timings.v_res;
|
|
int bytes_per_pixel = rgb_panel->fb_bits_per_pixel / 8;
|
|
uint32_t bytes_per_line = bytes_per_pixel * h_res;
|
|
|
|
// adjust the flush window by adding extra gap
|
|
x_start += rgb_panel->x_gap;
|
|
y_start += rgb_panel->y_gap;
|
|
x_end += rgb_panel->x_gap;
|
|
y_end += rgb_panel->y_gap;
|
|
|
|
// clip to boundaries
|
|
if (rgb_panel->rotate_mask & ROTATE_MASK_SWAP_XY) {
|
|
x_start = MAX(x_start, 0);
|
|
x_end = MIN(x_end, v_res);
|
|
y_start = MAX(y_start, 0);
|
|
y_end = MIN(y_end, h_res);
|
|
} else {
|
|
x_start = MAX(x_start, 0);
|
|
x_end = MIN(x_end, h_res);
|
|
y_start = MAX(y_start, 0);
|
|
y_end = MIN(y_end, v_res);
|
|
}
|
|
|
|
// check if we want to copy the draw buffer to the internal frame buffer
|
|
bool draw_buf_copy_to_fb = true;
|
|
uint8_t draw_buf_fb_index = 0;
|
|
for (int i = 0; i < rgb_panel->num_fbs; i++) {
|
|
if (draw_buffer >= rgb_panel->fbs[i] && draw_buffer < rgb_panel->fbs[i] + fb_size) {
|
|
draw_buf_fb_index = i;
|
|
draw_buf_copy_to_fb = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (draw_buf_copy_to_fb) {
|
|
// sync the draw buffer with the frame buffer by CPU copy
|
|
ESP_LOGV(TAG, "copy draw buffer to frame buffer by CPU");
|
|
uint8_t *fb = rgb_panel->fbs[rgb_panel->cur_fb_index];
|
|
size_t bytes_to_flush = v_res * bytes_per_line;
|
|
uint8_t *flush_ptr = fb;
|
|
|
|
const uint8_t *from = (const uint8_t *)color_data;
|
|
uint32_t copy_bytes_per_line = (x_end - x_start) * bytes_per_pixel;
|
|
size_t offset = y_start * copy_bytes_per_line + x_start * bytes_per_pixel;
|
|
uint8_t *to = fb;
|
|
if (1 == bytes_per_pixel) {
|
|
COPY_PIXEL_CODE_BLOCK(8)
|
|
} else if (2 == bytes_per_pixel) {
|
|
COPY_PIXEL_CODE_BLOCK(16)
|
|
} else if (3 == bytes_per_pixel) {
|
|
COPY_PIXEL_CODE_BLOCK(24)
|
|
}
|
|
// do memory sync only when the frame buffer is mounted to the DMA link list and behind the cache
|
|
if (!rgb_panel->bb_size && rgb_panel->flags.fb_behind_cache) {
|
|
esp_cache_msync(flush_ptr, bytes_to_flush, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
|
|
}
|
|
// after the draw buffer finished copying, notify the user to recycle the draw buffer
|
|
if (cb) {
|
|
cb(&rgb_panel->base, NULL, rgb_panel->user_ctx);
|
|
}
|
|
} else {
|
|
ESP_LOGV(TAG, "draw buffer is part of the frame buffer");
|
|
// the new frame buffer index is changed
|
|
rgb_panel->cur_fb_index = draw_buf_fb_index;
|
|
// when this function is called, the frame buffer already reflects the draw buffer changes
|
|
// if the frame buffer is also mounted to the DMA, we need to do the sync between them
|
|
if (!rgb_panel->bb_size && rgb_panel->flags.fb_behind_cache) {
|
|
uint8_t *cache_sync_start = rgb_panel->fbs[draw_buf_fb_index] + (y_start * h_res) * bytes_per_pixel;
|
|
size_t cache_sync_size = (y_end - y_start) * bytes_per_line;
|
|
esp_cache_msync(cache_sync_start, cache_sync_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
|
|
}
|
|
// after the draw buffer finished copying, notify the user to recycle the draw buffer
|
|
if (cb) {
|
|
cb(&rgb_panel->base, NULL, rgb_panel->user_ctx);
|
|
}
|
|
}
|
|
|
|
if (!rgb_panel->bb_size) {
|
|
if (rgb_panel->flags.stream_mode) {
|
|
for (int i = 0; i < rgb_panel->num_fbs; i++) {
|
|
// Note, because of DMA prefetch, there's possibility that the old frame buffer might be sent out again
|
|
// it's hard to know the time when the new frame buffer starts
|
|
gdma_link_concat(rgb_panel->dma_fb_links[i], -1, rgb_panel->dma_fb_links[rgb_panel->cur_fb_index], 0);
|
|
}
|
|
|
|
}
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_invert_color(esp_lcd_panel_t *panel, bool invert_color_data)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
int panel_id = rgb_panel->panel_id;
|
|
// inverting the data line by GPIO matrix
|
|
for (int i = 0; i < rgb_panel->data_width; i++) {
|
|
if (rgb_panel->data_gpio_nums[i] >= 0) {
|
|
esp_rom_gpio_connect_out_signal(rgb_panel->data_gpio_nums[i], lcd_periph_rgb_signals.panels[panel_id].data_sigs[i],
|
|
invert_color_data, false);
|
|
}
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
rgb_panel->rotate_mask &= ~(ROTATE_MASK_MIRROR_X | ROTATE_MASK_MIRROR_Y);
|
|
rgb_panel->rotate_mask |= (mirror_x << RGB_PANEL_MIRROR_X | mirror_y << RGB_PANEL_MIRROR_Y);
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_swap_xy(esp_lcd_panel_t *panel, bool swap_axes)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
rgb_panel->rotate_mask &= ~(ROTATE_MASK_SWAP_XY);
|
|
rgb_panel->rotate_mask |= swap_axes << RGB_PANEL_SWAP_XY;
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
rgb_panel->x_gap = x_gap;
|
|
rgb_panel->y_gap = y_gap;
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t rgb_panel_disp_on_off(esp_lcd_panel_t *panel, bool on_off)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
|
|
if (rgb_panel->disp_gpio_num < 0) {
|
|
return ESP_ERR_NOT_SUPPORTED;
|
|
}
|
|
if (!on_off) { // turn off screen
|
|
gpio_set_level(rgb_panel->disp_gpio_num, !rgb_panel->flags.disp_en_level);
|
|
} else { // turn on screen
|
|
gpio_set_level(rgb_panel->disp_gpio_num, rgb_panel->flags.disp_en_level);
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t lcd_rgb_panel_configure_gpio(esp_rgb_panel_t *rgb_panel, const esp_lcd_rgb_panel_config_t *panel_config)
|
|
{
|
|
int panel_id = rgb_panel->panel_id;
|
|
// Set the number of output data lines
|
|
lcd_ll_set_data_wire_width(rgb_panel->hal.dev, panel_config->data_width);
|
|
// connect peripheral signals via GPIO matrix
|
|
for (size_t i = 0; i < panel_config->data_width; i++) {
|
|
if (panel_config->data_gpio_nums[i] >= 0) {
|
|
gpio_func_sel(panel_config->data_gpio_nums[i], PIN_FUNC_GPIO);
|
|
esp_rom_gpio_connect_out_signal(panel_config->data_gpio_nums[i],
|
|
lcd_periph_rgb_signals.panels[panel_id].data_sigs[i], false, false);
|
|
}
|
|
}
|
|
if (panel_config->hsync_gpio_num >= 0) {
|
|
gpio_func_sel(panel_config->hsync_gpio_num, PIN_FUNC_GPIO);
|
|
esp_rom_gpio_connect_out_signal(panel_config->hsync_gpio_num,
|
|
lcd_periph_rgb_signals.panels[panel_id].hsync_sig, false, false);
|
|
}
|
|
if (panel_config->vsync_gpio_num >= 0) {
|
|
gpio_func_sel(panel_config->vsync_gpio_num, PIN_FUNC_GPIO);
|
|
esp_rom_gpio_connect_out_signal(panel_config->vsync_gpio_num,
|
|
lcd_periph_rgb_signals.panels[panel_id].vsync_sig, false, false);
|
|
}
|
|
// PCLK may not be necessary in some cases (i.e. VGA output)
|
|
if (panel_config->pclk_gpio_num >= 0) {
|
|
gpio_func_sel(panel_config->pclk_gpio_num, PIN_FUNC_GPIO);
|
|
esp_rom_gpio_connect_out_signal(panel_config->pclk_gpio_num,
|
|
lcd_periph_rgb_signals.panels[panel_id].pclk_sig, false, false);
|
|
}
|
|
// DE signal might not be necessary for some RGB LCD
|
|
if (panel_config->de_gpio_num >= 0) {
|
|
gpio_func_sel(panel_config->de_gpio_num, PIN_FUNC_GPIO);
|
|
esp_rom_gpio_connect_out_signal(panel_config->de_gpio_num,
|
|
lcd_periph_rgb_signals.panels[panel_id].de_sig, false, false);
|
|
}
|
|
// disp enable GPIO is optional, it is a general purpose output GPIO
|
|
if (panel_config->disp_gpio_num >= 0) {
|
|
gpio_func_sel(panel_config->disp_gpio_num, PIN_FUNC_GPIO);
|
|
gpio_output_enable(panel_config->disp_gpio_num);
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t lcd_rgb_panel_select_clock_src(esp_rgb_panel_t *rgb_panel, lcd_clock_source_t clk_src)
|
|
{
|
|
// get clock source frequency
|
|
uint32_t src_clk_hz = 0;
|
|
ESP_RETURN_ON_ERROR(esp_clk_tree_src_get_freq_hz((soc_module_clk_t)clk_src, ESP_CLK_TREE_SRC_FREQ_PRECISION_CACHED, &src_clk_hz),
|
|
TAG, "get clock source frequency failed");
|
|
rgb_panel->src_clk_hz = src_clk_hz;
|
|
esp_clk_tree_enable_src((soc_module_clk_t)clk_src, true);
|
|
LCD_CLOCK_SRC_ATOMIC() {
|
|
lcd_ll_select_clk_src(rgb_panel->hal.dev, clk_src);
|
|
}
|
|
|
|
// create pm lock based on different clock source
|
|
// clock sources like PLL and XTAL will be turned off in light sleep
|
|
#if CONFIG_PM_ENABLE
|
|
ESP_RETURN_ON_ERROR(esp_pm_lock_create(ESP_PM_NO_LIGHT_SLEEP, 0, "rgb_panel", &rgb_panel->pm_lock), TAG, "create pm lock failed");
|
|
// hold the lock during the whole lifecycle of RGB panel
|
|
esp_pm_lock_acquire(rgb_panel->pm_lock);
|
|
ESP_LOGD(TAG, "installed pm lock and hold the lock during the whole panel lifecycle");
|
|
#endif
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
static IRAM_ATTR bool lcd_rgb_panel_fill_bounce_buffer(esp_rgb_panel_t *panel, uint8_t *buffer)
|
|
{
|
|
bool need_yield = false;
|
|
int bytes_per_pixel = panel->fb_bits_per_pixel / 8;
|
|
if (unlikely(panel->num_fbs == 0)) {
|
|
// driver doesn't maintain a frame buffer, so ask the user to fill the bounce buffer
|
|
if (panel->on_bounce_empty) {
|
|
if (panel->on_bounce_empty(&panel->base, buffer, panel->bounce_pos_px, panel->bb_size, panel->user_ctx)) {
|
|
need_yield = true;
|
|
}
|
|
}
|
|
} else {
|
|
// copy partial frame buffer to the bounce buffer
|
|
// Note: if the frame buffer is behind a cache, and the cache is disabled, crash would happen here when auto write back happens
|
|
memcpy(buffer, &panel->fbs[panel->bb_fb_index][panel->bounce_pos_px * bytes_per_pixel], panel->bb_size);
|
|
}
|
|
// do memory sync if the bounce buffer is behind the cache
|
|
if (panel->flags.bb_behind_cache) {
|
|
esp_cache_msync(buffer, panel->bb_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
|
|
}
|
|
|
|
panel->bounce_pos_px += panel->bb_size / bytes_per_pixel;
|
|
// If the bounce pos is larger than the frame buffer size, wrap around so the next isr starts pre-loading the next frame.
|
|
if (panel->bounce_pos_px >= panel->fb_size / bytes_per_pixel) {
|
|
panel->bounce_pos_px = 0;
|
|
panel->bb_fb_index = panel->cur_fb_index;
|
|
esp_lcd_rgb_panel_frame_buf_complete_cb_t cb = panel->on_frame_buf_complete;
|
|
if (cb) {
|
|
if (cb(&panel->base, NULL, panel->user_ctx)) {
|
|
need_yield = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Preload the next bit of buffer to the cache memory, this can improve the performance
|
|
if (panel->num_fbs > 0 && panel->flags.fb_behind_cache) {
|
|
#if CONFIG_IDF_TARGET_ESP32S3
|
|
Cache_Start_DCache_Preload((uint32_t)&panel->fbs[panel->bb_fb_index][panel->bounce_pos_px * bytes_per_pixel],
|
|
panel->bb_size, 0);
|
|
#elif CONFIG_IDF_TARGET_ESP32P4
|
|
Cache_Start_L2_Cache_Preload((uint32_t)&panel->fbs[panel->bb_fb_index][panel->bounce_pos_px * bytes_per_pixel],
|
|
panel->bb_size, 0);
|
|
#else
|
|
#error "Unsupported target"
|
|
#endif
|
|
}
|
|
return need_yield;
|
|
}
|
|
|
|
static IRAM_ATTR bool lcd_rgb_panel_eof_handler(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data)
|
|
{
|
|
bool need_yield = false;
|
|
esp_rgb_panel_t *rgb_panel = (esp_rgb_panel_t *)user_data;
|
|
|
|
if (rgb_panel->bb_size) {
|
|
// in bounce buffer mode, the DMA EOF means time to fill the finished bounce buffer
|
|
// Figure out which bounce buffer to write to
|
|
portENTER_CRITICAL_ISR(&rgb_panel->spinlock);
|
|
int bb = rgb_panel->bb_eof_count % RGB_LCD_PANEL_BOUNCE_BUF_NUM;
|
|
rgb_panel->bb_eof_count++;
|
|
portEXIT_CRITICAL_ISR(&rgb_panel->spinlock);
|
|
need_yield = lcd_rgb_panel_fill_bounce_buffer(rgb_panel, rgb_panel->bounce_buffer[bb]);
|
|
} else {
|
|
// if not bounce buffer, the DMA EOF event means the end of a frame has been sent out to the LCD controller
|
|
if (rgb_panel->on_frame_buf_complete) {
|
|
if (rgb_panel->on_frame_buf_complete(&rgb_panel->base, NULL, rgb_panel->user_ctx)) {
|
|
need_yield = true;
|
|
}
|
|
}
|
|
}
|
|
return need_yield;
|
|
}
|
|
|
|
static esp_err_t lcd_rgb_create_dma_channel(esp_rgb_panel_t *rgb_panel)
|
|
{
|
|
// alloc DMA channel and connect to LCD peripheral
|
|
gdma_channel_alloc_config_t dma_chan_config = {
|
|
.direction = GDMA_CHANNEL_DIRECTION_TX,
|
|
};
|
|
ESP_RETURN_ON_ERROR(LCD_GDMA_NEW_CHANNEL(&dma_chan_config, &rgb_panel->dma_chan), TAG, "alloc DMA channel failed");
|
|
gdma_connect(rgb_panel->dma_chan, GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_LCD, 0));
|
|
|
|
// configure DMA strategy
|
|
gdma_strategy_config_t dma_strategy = {
|
|
.eof_till_data_popped = false,
|
|
};
|
|
gdma_apply_strategy(rgb_panel->dma_chan, &dma_strategy);
|
|
|
|
// configure DMA transfer
|
|
gdma_transfer_config_t trans_cfg = {
|
|
.max_data_burst_size = rgb_panel->dma_burst_size,
|
|
.access_ext_mem = rgb_panel->flags.fb_in_psram,
|
|
};
|
|
ESP_RETURN_ON_ERROR(gdma_config_transfer(rgb_panel->dma_chan, &trans_cfg), TAG, "config DMA transfer failed");
|
|
// get the memory alignment required by the DMA
|
|
gdma_get_alignment_constraints(rgb_panel->dma_chan, &rgb_panel->int_mem_align, &rgb_panel->ext_mem_align);
|
|
|
|
// register DMA EOF callback
|
|
gdma_tx_event_callbacks_t cbs = {
|
|
.on_trans_eof = lcd_rgb_panel_eof_handler,
|
|
};
|
|
ESP_RETURN_ON_ERROR(gdma_register_tx_event_callbacks(rgb_panel->dma_chan, &cbs, rgb_panel), TAG, "register DMA EOF callback failed");
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
#if RGB_LCD_NEEDS_SEPARATE_RESTART_LINK
|
|
// If we restart GDMA, the data sent to the LCD peripheral needs to start LCD_FIFO_PRESERVE_SIZE_PX pixels after the FB start
|
|
// so we use a dedicated DMA link (called restart link) to restart the transaction
|
|
#define LCD_FIFO_PRESERVE_SIZE_PX (LCD_LL_FIFO_DEPTH + 1)
|
|
#endif
|
|
|
|
static esp_err_t lcd_rgb_panel_init_trans_link(esp_rgb_panel_t *rgb_panel)
|
|
{
|
|
#if RGB_LCD_NEEDS_SEPARATE_RESTART_LINK
|
|
// the restart link shares the same buffer with the frame/bounce buffer but start from a different offset
|
|
int restart_skip_bytes = LCD_FIFO_PRESERVE_SIZE_PX * (rgb_panel->fb_bits_per_pixel / 8);
|
|
#endif
|
|
if (rgb_panel->bb_size) {
|
|
// DMA is used to convey the bounce buffer
|
|
size_t num_dma_nodes_per_bounce_buffer = (rgb_panel->bb_size + LCD_DMA_DESCRIPTOR_BUFFER_MAX_SIZE - 1) / LCD_DMA_DESCRIPTOR_BUFFER_MAX_SIZE;
|
|
gdma_link_list_config_t link_cfg = {
|
|
.buffer_alignment = rgb_panel->int_mem_align,
|
|
.item_alignment = LCD_GDMA_DESCRIPTOR_ALIGN,
|
|
.num_items = num_dma_nodes_per_bounce_buffer * RGB_LCD_PANEL_BOUNCE_BUF_NUM,
|
|
.flags = {
|
|
.check_owner = true,
|
|
}
|
|
};
|
|
ESP_RETURN_ON_ERROR(gdma_new_link_list(&link_cfg, &rgb_panel->dma_bb_link), TAG, "create bounce buffer DMA link failed");
|
|
// mount bounce buffers to the DMA link list
|
|
gdma_buffer_mount_config_t mount_cfgs[RGB_LCD_PANEL_BOUNCE_BUF_NUM] = {0};
|
|
for (int i = 0; i < RGB_LCD_PANEL_BOUNCE_BUF_NUM; i++) {
|
|
mount_cfgs[i].buffer = rgb_panel->bounce_buffer[i];
|
|
mount_cfgs[i].length = rgb_panel->bb_size;
|
|
mount_cfgs[i].flags.mark_eof = true; // we use the DMA EOF interrupt to copy the frame buffer (partially) to the bounce buffer
|
|
}
|
|
ESP_RETURN_ON_ERROR(gdma_link_mount_buffers(rgb_panel->dma_bb_link, 0, mount_cfgs, RGB_LCD_PANEL_BOUNCE_BUF_NUM, NULL),
|
|
TAG, "mount DMA bounce buffers failed");
|
|
#if RGB_LCD_NEEDS_SEPARATE_RESTART_LINK
|
|
// create restart link
|
|
gdma_link_list_config_t restart_link_cfg = {
|
|
.buffer_alignment = rgb_panel->int_mem_align,
|
|
.item_alignment = LCD_GDMA_DESCRIPTOR_ALIGN,
|
|
.num_items = 1, // the restart link only contains one node
|
|
.flags = {
|
|
.check_owner = true,
|
|
}
|
|
};
|
|
ESP_RETURN_ON_ERROR(gdma_new_link_list(&restart_link_cfg, &rgb_panel->dma_restart_link), TAG, "create DMA restart link list failed");
|
|
gdma_buffer_mount_config_t restart_buffer_mount_cfg = {
|
|
.buffer = rgb_panel->bounce_buffer[0] + restart_skip_bytes,
|
|
.length = MIN(LCD_DMA_DESCRIPTOR_BUFFER_MAX_SIZE, rgb_panel->bb_size) - restart_skip_bytes,
|
|
};
|
|
ESP_RETURN_ON_ERROR(gdma_link_mount_buffers(rgb_panel->dma_restart_link, 0, &restart_buffer_mount_cfg, 1, NULL),
|
|
TAG, "mount DMA restart buffer failed");
|
|
|
|
// Magic here: we use the restart link to restart the bounce buffer link list, so concat them
|
|
gdma_link_concat(rgb_panel->dma_restart_link, 0, rgb_panel->dma_bb_link, 1);
|
|
#endif
|
|
} else {
|
|
// DMA is used to convey the frame buffer
|
|
size_t num_dma_nodes = (rgb_panel->fb_size + LCD_DMA_DESCRIPTOR_BUFFER_MAX_SIZE - 1) / LCD_DMA_DESCRIPTOR_BUFFER_MAX_SIZE;
|
|
gdma_link_list_config_t link_cfg = {
|
|
.buffer_alignment = rgb_panel->flags.fb_in_psram ? rgb_panel->ext_mem_align : rgb_panel->int_mem_align,
|
|
.item_alignment = LCD_GDMA_DESCRIPTOR_ALIGN,
|
|
.num_items = num_dma_nodes,
|
|
.flags = {
|
|
.check_owner = true,
|
|
},
|
|
};
|
|
gdma_buffer_mount_config_t mount_cfg = {
|
|
.length = rgb_panel->fb_size,
|
|
.flags = {
|
|
.mark_final = rgb_panel->flags.stream_mode ? false : true,
|
|
.mark_eof = true,
|
|
},
|
|
};
|
|
for (size_t i = 0; i < rgb_panel->num_fbs; i++) {
|
|
ESP_RETURN_ON_ERROR(gdma_new_link_list(&link_cfg, &rgb_panel->dma_fb_links[i]), TAG, "create frame buffer DMA link failed");
|
|
// mount bounce buffers to the DMA link list
|
|
mount_cfg.buffer = rgb_panel->fbs[i];
|
|
ESP_RETURN_ON_ERROR(gdma_link_mount_buffers(rgb_panel->dma_fb_links[i], 0, &mount_cfg, 1, NULL),
|
|
TAG, "mount DMA frame buffer failed");
|
|
}
|
|
#if RGB_LCD_NEEDS_SEPARATE_RESTART_LINK
|
|
// create restart link
|
|
gdma_link_list_config_t restart_link_cfg = {
|
|
.buffer_alignment = rgb_panel->flags.fb_in_psram ? rgb_panel->ext_mem_align : rgb_panel->int_mem_align,
|
|
.item_alignment = LCD_GDMA_DESCRIPTOR_ALIGN,
|
|
.num_items = 1, // the restart link only contains one node
|
|
.flags = {
|
|
.check_owner = true,
|
|
}
|
|
};
|
|
ESP_RETURN_ON_ERROR(gdma_new_link_list(&restart_link_cfg, &rgb_panel->dma_restart_link), TAG, "create DMA restart link list failed");
|
|
gdma_buffer_mount_config_t restart_buffer_mount_cfg = {
|
|
.buffer = rgb_panel->fbs[0] + restart_skip_bytes,
|
|
.length = MIN(LCD_DMA_DESCRIPTOR_BUFFER_MAX_SIZE, rgb_panel->fb_size) - restart_skip_bytes,
|
|
};
|
|
ESP_RETURN_ON_ERROR(gdma_link_mount_buffers(rgb_panel->dma_restart_link, 0, &restart_buffer_mount_cfg, 1, NULL),
|
|
TAG, "mount DMA restart buffer failed");
|
|
|
|
// Magic here: we use the restart link to restart the frame buffer link list, so concat them
|
|
gdma_link_concat(rgb_panel->dma_restart_link, 0, rgb_panel->dma_fb_links[0], 1);
|
|
#endif
|
|
}
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
// reset the GDMA channel every VBlank to stop permanent desyncs from happening.
|
|
// Note that this fix can lead to single-frame desyncs itself, as in: if this interrupt
|
|
// is late enough, the display will shift as the LCD controller already read out the
|
|
// first data bytes, and resetting DMA will re-send those. However, the single-frame
|
|
// desync this leads to is preferable to the permanent desync that could otherwise
|
|
// happen. It's also not super-likely as this interrupt has the entirety of the VBlank
|
|
// time to reset DMA.
|
|
static IRAM_ATTR void lcd_rgb_panel_try_restart_transmission(esp_rgb_panel_t *panel)
|
|
{
|
|
int bb_size_px = panel->bb_size / (panel->fb_bits_per_pixel / 8);
|
|
bool do_restart = false;
|
|
#if CONFIG_LCD_RGB_RESTART_IN_VSYNC
|
|
do_restart = true;
|
|
#else
|
|
portENTER_CRITICAL_ISR(&panel->spinlock);
|
|
if (panel->flags.need_restart) {
|
|
panel->flags.need_restart = false;
|
|
do_restart = true;
|
|
}
|
|
if (panel->bb_eof_count < panel->expect_eof_count) {
|
|
do_restart = true;
|
|
}
|
|
panel->bb_eof_count = 0;
|
|
portEXIT_CRITICAL_ISR(&panel->spinlock);
|
|
#endif // CONFIG_LCD_RGB_RESTART_IN_VSYNC
|
|
|
|
if (!do_restart) {
|
|
return;
|
|
}
|
|
|
|
if (panel->bb_size) {
|
|
// Catch de-synced frame buffer and reset if needed.
|
|
if (panel->bounce_pos_px > bb_size_px * 2) {
|
|
panel->bounce_pos_px = 0;
|
|
}
|
|
// Pre-fill bounce buffer 0, if the EOF ISR didn't do that already
|
|
if (panel->bounce_pos_px < bb_size_px) {
|
|
lcd_rgb_panel_fill_bounce_buffer(panel, panel->bounce_buffer[0]);
|
|
}
|
|
}
|
|
|
|
gdma_reset(panel->dma_chan);
|
|
lcd_ll_fifo_reset(panel->hal.dev);
|
|
#if RGB_LCD_NEEDS_SEPARATE_RESTART_LINK
|
|
// restart the DMA by a special DMA node
|
|
gdma_start(panel->dma_chan, gdma_link_get_head_addr(panel->dma_restart_link));
|
|
#else
|
|
if (panel->bb_size) {
|
|
gdma_start(panel->dma_chan, gdma_link_get_head_addr(panel->dma_bb_link));
|
|
} else {
|
|
gdma_start(panel->dma_chan, gdma_link_get_head_addr(panel->dma_fb_links[panel->cur_fb_index]));
|
|
}
|
|
#endif
|
|
|
|
if (panel->bb_size) {
|
|
// Fill 2nd bounce buffer while 1st is being sent out, if needed.
|
|
if (panel->bounce_pos_px < bb_size_px * 2) {
|
|
lcd_rgb_panel_fill_bounce_buffer(panel, panel->bounce_buffer[1]);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
static void lcd_rgb_panel_start_transmission(esp_rgb_panel_t *rgb_panel)
|
|
{
|
|
// reset FIFO of DMA and LCD, in case there remains old frame data
|
|
gdma_reset(rgb_panel->dma_chan);
|
|
lcd_ll_stop(rgb_panel->hal.dev);
|
|
lcd_ll_reset(rgb_panel->hal.dev);
|
|
lcd_ll_fifo_reset(rgb_panel->hal.dev);
|
|
|
|
// pre-fill bounce buffers if needed
|
|
if (rgb_panel->bb_size) {
|
|
rgb_panel->bounce_pos_px = 0;
|
|
lcd_rgb_panel_fill_bounce_buffer(rgb_panel, rgb_panel->bounce_buffer[0]);
|
|
lcd_rgb_panel_fill_bounce_buffer(rgb_panel, rgb_panel->bounce_buffer[1]);
|
|
}
|
|
|
|
// the start of DMA should be prior to the start of LCD engine
|
|
if (rgb_panel->bb_size) {
|
|
gdma_start(rgb_panel->dma_chan, gdma_link_get_head_addr(rgb_panel->dma_bb_link));
|
|
} else {
|
|
gdma_start(rgb_panel->dma_chan, gdma_link_get_head_addr(rgb_panel->dma_fb_links[rgb_panel->cur_fb_index]));
|
|
}
|
|
// delay 1us is sufficient for DMA to pass data to LCD FIFO
|
|
// in fact, this is only needed when LCD pixel clock is set too high
|
|
esp_rom_delay_us(1);
|
|
// start LCD engine
|
|
lcd_ll_start(rgb_panel->hal.dev);
|
|
}
|
|
|
|
IRAM_ATTR static void lcd_rgb_panel_try_update_pclk(esp_rgb_panel_t *rgb_panel)
|
|
{
|
|
hal_utils_clk_div_t lcd_clk_div = {};
|
|
portENTER_CRITICAL_ISR(&rgb_panel->spinlock);
|
|
if (unlikely(rgb_panel->flags.need_update_pclk)) {
|
|
rgb_panel->flags.need_update_pclk = false;
|
|
rgb_panel->timings.pclk_hz = lcd_hal_cal_pclk_freq(&rgb_panel->hal, rgb_panel->src_clk_hz, rgb_panel->timings.pclk_hz, &lcd_clk_div);
|
|
LCD_CLOCK_SRC_ATOMIC() {
|
|
lcd_ll_set_group_clock_coeff(rgb_panel->hal.dev, lcd_clk_div.integer, lcd_clk_div.denominator, lcd_clk_div.numerator);
|
|
}
|
|
}
|
|
portEXIT_CRITICAL_ISR(&rgb_panel->spinlock);
|
|
}
|
|
|
|
IRAM_ATTR static void rgb_lcd_default_isr_handler(void *args)
|
|
{
|
|
esp_rgb_panel_t *rgb_panel = (esp_rgb_panel_t *)args;
|
|
bool need_yield = false;
|
|
|
|
// clear the interrupt status
|
|
uint32_t intr_status = lcd_ll_get_interrupt_status(rgb_panel->hal.dev);
|
|
lcd_ll_clear_interrupt_status(rgb_panel->hal.dev, intr_status);
|
|
|
|
// VSYNC event happened
|
|
if (intr_status & LCD_LL_EVENT_VSYNC_END) {
|
|
// call user registered callback
|
|
if (rgb_panel->on_vsync) {
|
|
if (rgb_panel->on_vsync(&rgb_panel->base, NULL, rgb_panel->user_ctx)) {
|
|
need_yield = true;
|
|
}
|
|
}
|
|
|
|
// check whether to update the PCLK frequency, it should be safe to update the PCLK frequency in the VSYNC interrupt
|
|
lcd_rgb_panel_try_update_pclk(rgb_panel);
|
|
|
|
if (rgb_panel->flags.stream_mode) {
|
|
// check whether to restart the transmission
|
|
lcd_rgb_panel_try_restart_transmission(rgb_panel);
|
|
}
|
|
|
|
}
|
|
// yield if needed
|
|
if (need_yield) {
|
|
portYIELD_FROM_ISR();
|
|
}
|
|
}
|