/*
 * Copyright (C) 2017 Jernej Skrabec <jernej.skrabec@siol.net>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#ifndef _SUN8I_UI_SCALER_H_
#define _SUN8I_UI_SCALER_H_

#include "sun8i_mixer.h"

#define DE2_UI_SCALER_UNIT_SIZE 0x10000
#define DE3_UI_SCALER_UNIT_SIZE 0x08000

/* this two macros assumes 16 fractional bits which is standard in DRM */
#define SUN8I_UI_SCALER_SCALE_MIN               1
#define SUN8I_UI_SCALER_SCALE_MAX               ((1UL << 20) - 1)

#define SUN8I_UI_SCALER_SCALE_FRAC              20
#define SUN8I_UI_SCALER_PHASE_FRAC              20
#define SUN8I_UI_SCALER_COEFF_COUNT             16
#define SUN8I_UI_SCALER_SIZE(w, h)              (((h) - 1) << 16 | ((w) - 1))

#define SUN8I_SCALER_GSU_CTRL(base)             ((base) + 0x0)
#define SUN8I_SCALER_GSU_OUTSIZE(base)          ((base) + 0x40)
#define SUN8I_SCALER_GSU_INSIZE(base)           ((base) + 0x80)
#define SUN8I_SCALER_GSU_HSTEP(base)            ((base) + 0x88)
#define SUN8I_SCALER_GSU_VSTEP(base)            ((base) + 0x8c)
#define SUN8I_SCALER_GSU_HPHASE(base)           ((base) + 0x90)
#define SUN8I_SCALER_GSU_VPHASE(base)           ((base) + 0x98)
#define SUN8I_SCALER_GSU_HCOEFF(base, index)    ((base) + 0x200 + 0x4 * (index))

#define SUN8I_SCALER_GSU_CTRL_EN                BIT(0)
#define SUN8I_SCALER_GSU_CTRL_COEFF_RDY         BIT(4)

void sun8i_ui_scaler_enable(struct sun8i_layer *layer, bool enable);
void sun8i_ui_scaler_setup(struct sun8i_layer *layer,
                           u32 src_w, u32 src_h, u32 dst_w, u32 dst_h,
                           u32 hscale, u32 vscale, u32 hphase, u32 vphase);

#endif