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fix(rgb_lcd): don't assume 16 bit width on panels for restart logic

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Merges https://github.com/espressif/esp-idf/pull/13020
This commit is contained in:
Brian Whitman 2024-01-20 10:59:24 -08:00 committed by morris
parent 7cbee80fb9
commit 6319f9ab2c
1 changed files with 11 additions and 9 deletions
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20
components/esp_lcd/src/esp_lcd_panel_rgb.c
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -98,11 +98,11 @@ struct esp_rgb_panel_t {
uint8_t *fbs[RGB_LCD_PANEL_MAX_FB_NUM]; // Frame buffers
uint8_t cur_fb_index; // Current frame buffer index
uint8_t bb_fb_index; // Current frame buffer index which used by bounce buffer
size_t fb_size; // Size of frame buffer
size_t fb_size; // Size of frame buffer, in bytes
int data_gpio_nums[SOC_LCD_RGB_DATA_WIDTH]; // GPIOs used for data lines, we keep these GPIOs for action like "invert_color"
uint32_t src_clk_hz; // Peripheral source clock resolution
esp_lcd_rgb_timing_t timings; // RGB timing parameters (e.g. pclk, sync pulse, porch width)
size_t bb_size; // If not-zero, the driver uses two bounce buffers allocated from internal memory
size_t bb_size; // Size of the bounce buffer, in bytes. If not-zero, the driver uses two bounce buffers allocated from internal memory
int bounce_pos_px; // Position in whatever source material is used for the bounce buffer, in pixels
uint8_t *bounce_buffer[RGB_LCD_PANEL_BOUNCE_BUF_NUM]; // Pointer to the bounce buffers
gdma_channel_handle_t dma_chan; // DMA channel handle
@ -307,6 +307,7 @@ esp_err_t esp_lcd_new_rgb_panel(const esp_lcd_rgb_panel_config_t *rgb_panel_conf
// install DMA service
rgb_panel->flags.stream_mode = !rgb_panel_config->flags.refresh_on_demand;
rgb_panel->fb_bits_per_pixel = fb_bits_per_pixel;
ret = lcd_rgb_panel_create_trans_link(rgb_panel);
ESP_GOTO_ON_ERROR(ret, err, TAG, "install DMA failed");
// configure GPIO
@ -316,7 +317,6 @@ esp_err_t esp_lcd_new_rgb_panel(const esp_lcd_rgb_panel_config_t *rgb_panel_conf
memcpy(rgb_panel->data_gpio_nums, rgb_panel_config->data_gpio_nums, SOC_LCD_RGB_DATA_WIDTH);
rgb_panel->timings = rgb_panel_config->timings;
rgb_panel->data_width = rgb_panel_config->data_width;
rgb_panel->fb_bits_per_pixel = fb_bits_per_pixel;
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;
@ -970,7 +970,7 @@ static esp_err_t lcd_rgb_panel_create_trans_link(esp_rgb_panel_t *panel)
// so we use a dedicated DMA node to restart the DMA transaction
// see also `lcd_rgb_panel_try_restart_transmission`
memcpy(&panel->dma_restart_node, &panel->dma_nodes[0], sizeof(panel->dma_restart_node));
int restart_skip_bytes = LCD_FIFO_PRESERVE_SIZE_PX * sizeof(uint16_t);
int restart_skip_bytes = LCD_FIFO_PRESERVE_SIZE_PX * (panel->fb_bits_per_pixel / 8);
uint8_t *p = (uint8_t *)panel->dma_restart_node.buffer;
panel->dma_restart_node.buffer = &p[restart_skip_bytes];
panel->dma_restart_node.dw0.length -= restart_skip_bytes;
@ -1008,6 +1008,7 @@ static esp_err_t lcd_rgb_panel_create_trans_link(esp_rgb_panel_t *panel)
// 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;
@ -1026,11 +1027,11 @@ static IRAM_ATTR void lcd_rgb_panel_try_restart_transmission(esp_rgb_panel_t *pa
if (panel->bb_size) {
// Catch de-synced frame buffer and reset if needed.
if (panel->bounce_pos_px > panel->bb_size) {
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 < panel->bb_size / 2) {
if (panel->bounce_pos_px < bb_size_px) {
lcd_rgb_panel_fill_bounce_buffer(panel, panel->bounce_buffer[0]);
}
}
@ -1041,10 +1042,11 @@ static IRAM_ATTR void lcd_rgb_panel_try_restart_transmission(esp_rgb_panel_t *pa
if (panel->bb_size) {
// Fill 2nd bounce buffer while 1st is being sent out, if needed.
if (panel->bounce_pos_px < panel->bb_size) {
lcd_rgb_panel_fill_bounce_buffer(panel, panel->bounce_buffer[0]);
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)