So it has come to this.

ipl/di.h

@@ -0,0 +1,72 @@
+/*
+* Copyright (c) 2018 naehrwert
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms and conditions of the GNU General Public License,
+* version 2, as published by the Free Software Foundation.
+*
+* This program is distributed in the hope it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+* more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _DI_H_
+#define _DI_H_
+
+#include "types.h"
+
+/*! Display registers. */
+#define _DIREG(reg) ((reg) * 4)
+#define DC_CMD_DISPLAY_COMMAND 0x32
+#define DC_CMD_STATE_ACCESS 0x40
+#define DC_CMD_STATE_CONTROL 0x41
+#define DC_CMD_DISPLAY_WINDOW_HEADER 0x42
+#define DC_DISP_DISP_WIN_OPTIONS 0x402
+#define DC_DISP_DISP_CLOCK_CONTROL 0x42E
+#define DC_DISP_BLEND_BACKGROUND_COLOR 0x4E4
+#define DC_WIN_AD_WIN_OPTIONS 0xB80
+#define DC_WIN_BD_WIN_OPTIONS 0xD80
+#define DC_WIN_CD_WIN_OPTIONS 0xF80
+
+//The following registers are A/B/C shadows of the 0xB80/0xD80/0xF80 registers (see DISPLAY_WINDOW_HEADER).
+#define DC_X_WIN_XD_WIN_OPTIONS 0x700
+#define DC_X_WIN_XD_COLOR_DEPTH 0x703
+#define DC_X_WIN_XD_POSITION 0x704
+#define DC_X_WIN_XD_SIZE 0x705
+#define DC_X_WIN_XD_PRESCALED_SIZE 0x706
+#define DC_X_WIN_XD_H_INITIAL_DDA 0x707
+#define DC_X_WIN_XD_V_INITIAL_DDA 0x708
+#define DC_X_WIN_XD_DDA_INCREMENT 0x709
+#define DC_X_WIN_XD_LINE_STRIDE 0x70A
+
+//The following registers are A/B/C shadows of the 0xBC0/0xDC0/0xFC0 registers (see DISPLAY_WINDOW_HEADER).
+#define DC_X_WINBUF_XD_START_ADDR 0x800
+#define DC_X_WINBUF_XD_ADDR_H_OFFSET 0x806
+#define DC_X_WINBUF_XD_ADDR_V_OFFSET 0x808
+#define DC_X_WINBUF_XD_SURFACE_KIND 0x80B
+
+/*! Display serial interface registers. */
+#define _DSIREG(reg) ((reg) * 4)
+#define DSI_DSI_RD_DATA 0x9
+#define DSI_DSI_WR_DATA 0xA
+#define DSI_DSI_POWER_CONTROL 0xB
+#define DSI_HOST_DSI_CONTROL 0xF
+#define DSI_DSI_TRIGGER 0x13
+#define DSI_DSI_BTA_TIMING 0x3F
+#define DSI_PAD_CONTROL 0x4B
+#define DSI_DSI_VID_MODE_CONTROL 0x4E
+
+void display_init();
+void display_end();
+
+/*! Show one single color on the display. */
+void display_color_screen(u32 color);
+
+/*! Init display in full 1280x720 resolution (32bpp, line stride 768, framebuffer size = 1280*768*4 bytes). */
+u32 *display_init_framebuffer();
+
+#endif