MIPI DSI LCD Panel Example: how to use ILI9881C panel in landscape orientation? (IDFGH-13779)

[dmartauz]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

I attempted to run following example on ESP32-P4 with ILI9881C display:
https://github.com/espressif/esp-idf/tree/master/examples/peripherals/lcd/mipi_dsi

To make it work, I had to comment out part of esp_lcd_ili9881c driver which queries ID as it got stuck at esp_lcd_panel_io_rx_param :

    uint8_t ID1, ID2, ID3;
    esp_lcd_panel_io_tx_param(io, ILI9881C_CMD_CNDBKxSEL, (uint8_t[]) {
        ILI9881C_CMD_BKxSEL_BYTE0, ILI9881C_CMD_BKxSEL_BYTE1, ILI9881C_CMD_BKxSEL_BYTE2_PAGE1
    }, 3);
    esp_lcd_panel_io_rx_param(io, 0x00, &ID1, 1);
    esp_lcd_panel_io_rx_param(io, 0x01, &ID2, 1);
    esp_lcd_panel_io_rx_param(io, 0x02, &ID3, 1);
    ESP_LOGI(TAG, "ID1: 0x%x, ID2: 0x%x, ID3: 0x%x", ID1, ID2, ID3);

After that I managed to run the example which was displayed in portrait orientation.

I then attempted to rotate the display using esp_lcd_panel_swap_xy() with following result:

E (1658) lcd_panel: esp_lcd_panel_swap_xy(50): swap_xy is not supported by this panel

I also tried to rotate the screen on LVGL level using lv_display_set_rotation() but this attempt failed as well.

In LVGL documentation I found: In lack of hardware display rotation support lv_draw_sw_rotate can be used to rotate the buffer in the flush_cb.

However I am not sure how to implement it correctly. Could you please provide an example?

[suda-morris]

duplicated with espressif/esp-bsp#400