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i80_lcd: support skip command phase

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Closes https://github.com/espressif/esp-idf/issues/10794
This commit is contained in:
morris
2023-04-03 14:08:59 +08:00
parent 9813947f62
commit e73d8166aa
6 changed files with 75 additions and 12 deletions
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13
components/esp_lcd/src/esp_lcd_panel_io_i80.c
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -578,9 +578,16 @@ static void lcd_periph_trigger_quick_trans_done_event(esp_lcd_i80_bus_handle_t b
static void lcd_start_transaction(esp_lcd_i80_bus_t *bus, lcd_i80_trans_descriptor_t *trans_desc)
{
// by default, the dummy phase is disabled because it's not common for most LCDs
uint32_t dummy_cycles = 0;
uint32_t cmd_cycles = trans_desc->cmd_value >= 0 ? trans_desc->cmd_cycles : 0;
// Number of data phase cycles are controlled by DMA buffer length, we only need to enable/disable the phase here
lcd_ll_set_phase_cycles(bus->hal.dev, trans_desc->cmd_cycles, 0, trans_desc->data ? 1 : 0);
lcd_ll_set_command(bus->hal.dev, bus->bus_width, trans_desc->cmd_value);
uint32_t data_cycles = trans_desc->data ? 1 : 0;
if (trans_desc->cmd_value >= 0) {
lcd_ll_set_command(bus->hal.dev, bus->bus_width, trans_desc->cmd_value);
}
lcd_ll_set_phase_cycles(bus->hal.dev, cmd_cycles, dummy_cycles, data_cycles);
lcd_ll_set_blank_cycles(bus->hal.dev, 1, 1);
if (trans_desc->data) { // some specific LCD commands can have no parameters
gdma_start(bus->dma_chan, (intptr_t)(bus->dma_nodes));
// delay 1us is sufficient for DMA to pass data to LCD FIFO