fixed misaligned data transfer for ssd1306

(cherry picked from commit 46a2bf8ac9d309b80d8d6e7f3a0a8813593b6644)

components/esp_lcd/src/esp_lcd_panel_io_i2c.c

@@ -141,10 +141,15 @@ static esp_err_t panel_io_i2c_tx_buffer(esp_lcd_panel_io_t *io, int lcd_cmd, con
         ESP_GOTO_ON_ERROR(i2c_master_write_byte(cmd_link, is_param ? i2c_panel_io->control_phase_cmd : i2c_panel_io->control_phase_data, true),
                         err, TAG, "write control phase failed"); // control phase
     }
-    uint8_t cmds[4] = {BYTESHIFT(lcd_cmd, 3), BYTESHIFT(lcd_cmd, 2), BYTESHIFT(lcd_cmd, 1), BYTESHIFT(lcd_cmd, 0)};
-    size_t cmds_size = i2c_panel_io->lcd_cmd_bits / 8;
-    if (cmds_size > 0 && cmds_size <= sizeof(cmds)) {
-        ESP_GOTO_ON_ERROR(i2c_master_write(cmd_link, cmds + (sizeof(cmds) - cmds_size), cmds_size, true), err, TAG, "write LCD cmd failed");
+
+    // some displays don't want any additional commands on data transfers
+    if (lcd_cmd != -1)
+    {
+        uint8_t cmds[4] = {BYTESHIFT(lcd_cmd, 3), BYTESHIFT(lcd_cmd, 2), BYTESHIFT(lcd_cmd, 1), BYTESHIFT(lcd_cmd, 0)};
+        size_t cmds_size = i2c_panel_io->lcd_cmd_bits / 8;
+        if (cmds_size > 0 && cmds_size <= sizeof(cmds)) {
+            ESP_GOTO_ON_ERROR(i2c_master_write(cmd_link, cmds + (sizeof(cmds) - cmds_size), cmds_size, true), err, TAG, "write LCD cmd failed");
+        }
     }
 
     if (buffer) {

components/esp_lcd/src/esp_lcd_panel_ssd1306.c

@@ -171,7 +171,7 @@ static esp_err_t panel_ssd1306_draw_bitmap(esp_lcd_panel_t *panel, int x_start,
     }, 2);
     // transfer frame buffer
     size_t len = (y_end - y_start) * (x_end - x_start) * ssd1306->bits_per_pixel / 8;
-    esp_lcd_panel_io_tx_color(io, 0, color_data, len);
+    esp_lcd_panel_io_tx_color(io, -1, color_data, len);
 
     return ESP_OK;
 }