From 5f6eac2283d05ce7d33e18df863ba1d40ec74e17 Mon Sep 17 00:00:00 2001
From: Vilem Zavodny <vilem.zavodny@espressif.com>
Date: Tue, 6 Dec 2022 15:24:19 +0100
Subject: [PATCH] lcd: Support rotation SSD1306 and fix mirror y.

---
 .../esp_lcd/src/esp_lcd_panel_ssd1306.c       | 21 +++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/components/esp_lcd/src/esp_lcd_panel_ssd1306.c b/components/esp_lcd/src/esp_lcd_panel_ssd1306.c
index 86d73bfde8..8d78eba72c 100644
--- a/components/esp_lcd/src/esp_lcd_panel_ssd1306.c
+++ b/components/esp_lcd/src/esp_lcd_panel_ssd1306.c
@@ -56,6 +56,7 @@ typedef struct {
     int x_gap;
     int y_gap;
     unsigned int bits_per_pixel;
+    bool swap_axes;
 } ssd1306_panel_t;
 
 esp_err_t esp_lcd_new_panel_ssd1306(const esp_lcd_panel_io_handle_t io, const esp_lcd_panel_dev_config_t *panel_dev_config, esp_lcd_panel_handle_t *ret_panel)
@@ -143,6 +144,8 @@ static esp_err_t panel_ssd1306_init(esp_lcd_panel_t *panel)
     esp_lcd_panel_io_tx_param(io, SSD1306_CMD_SET_CHARGE_PUMP, (uint8_t[]) {
         0x14 // enable charge pump
     }, 1);
+    esp_lcd_panel_io_tx_param(io, SSD1306_CMD_MIRROR_X_OFF, NULL, 0);
+    esp_lcd_panel_io_tx_param(io, SSD1306_CMD_MIRROR_Y_OFF, NULL, 0);
     return ESP_OK;
 }
 
@@ -151,11 +154,22 @@ static esp_err_t panel_ssd1306_draw_bitmap(esp_lcd_panel_t *panel, int x_start,
     ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
     assert((x_start < x_end) && (y_start < y_end) && "start position must be smaller than end position");
     esp_lcd_panel_io_handle_t io = ssd1306->io;
+
     // adding extra gap
     x_start += ssd1306->x_gap;
     x_end += ssd1306->x_gap;
     y_start += ssd1306->y_gap;
     y_end += ssd1306->y_gap;
+
+    if (ssd1306->swap_axes) {
+        int x = x_start;
+        x_start = y_start;
+        y_start = x;
+        x = x_end;
+        x_end = y_end;
+        y_end = x;
+    }
+
     // one page contains 8 rows (COMs)
     uint8_t page_start = y_start / 8;
     uint8_t page_end = (y_end - 1) / 8;
@@ -204,7 +218,7 @@ static esp_err_t panel_ssd1306_mirror(esp_lcd_panel_t *panel, bool mirror_x, boo
     if (mirror_y) {
         command = SSD1306_CMD_MIRROR_Y_ON;
     } else {
-        command = SSD1306_CMD_MIRROR_X_OFF;
+        command = SSD1306_CMD_MIRROR_Y_OFF;
     }
     esp_lcd_panel_io_tx_param(io, command, NULL, 0);
     return ESP_OK;
@@ -212,7 +226,10 @@ static esp_err_t panel_ssd1306_mirror(esp_lcd_panel_t *panel, bool mirror_x, boo
 
 static esp_err_t panel_ssd1306_swap_xy(esp_lcd_panel_t *panel, bool swap_axes)
 {
-    return ESP_ERR_NOT_SUPPORTED;
+    ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base);
+    ssd1306->swap_axes = swap_axes;
+
+    return ESP_OK;
 }
 
 static esp_err_t panel_ssd1306_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap)