1 /*
2  * Copyright (C) 2017 Jernej Skrabec <jernej.skrabec@siol.net>
3  *
4  * Coefficients are taken from BSP driver, which is:
5  * Copyright (C) 2014-2015 Allwinner
6  *
7  * This file is licensed under the terms of the GNU General Public
8  * License version 2.  This program is licensed "as is" without any
9  * warranty of any kind, whether express or implied.
10  */
11 
12 #include "sun8i_ui_scaler.h"
13 
14 static const u32 lan2coefftab16[240] = {
15 	0x00004000, 0x00033ffe, 0x00063efc, 0x000a3bfb,
16 	0xff0f37fb, 0xfe1433fb, 0xfd192ffb, 0xfd1f29fb,
17 	0xfc2424fc, 0xfb291ffd, 0xfb2f19fd, 0xfb3314fe,
18 	0xfb370fff, 0xfb3b0a00, 0xfc3e0600, 0xfe3f0300,
19 
20 	0xff053804, 0xff083801, 0xff0a3700, 0xff0e34ff,
21 	0xff1232fd, 0xfe162ffd, 0xfd1b2cfc, 0xfd1f28fc,
22 	0xfd2323fd, 0xfc281ffd, 0xfc2c1bfd, 0xfd2f16fe,
23 	0xfd3212ff, 0xff340eff, 0x00360a00, 0x02370700,
24 
25 	0xff083207, 0xff0a3205, 0xff0d3103, 0xfe113001,
26 	0xfe142e00, 0xfe182bff, 0xfe1b29fe, 0xfe1f25fe,
27 	0xfe2222fe, 0xfe251ffe, 0xfe291bfe, 0xff2b18fe,
28 	0x002e14fe, 0x013010ff, 0x03310dff, 0x05310a00,
29 
30 	0xff0a2e09, 0xff0c2e07, 0xff0f2d05, 0xff122c03,
31 	0xfe152b02, 0xfe182901, 0xfe1b2700, 0xff1e24ff,
32 	0xff2121ff, 0xff241eff, 0x00261bff, 0x012818ff,
33 	0x022a15ff, 0x032c12ff, 0x052d0fff, 0x072d0c00,
34 
35 	0xff0c2a0b, 0xff0e2a09, 0xff102a07, 0xff132905,
36 	0xff162803, 0xff182702, 0xff1b2501, 0xff1e2300,
37 	0x00202000, 0x01221d00, 0x01251bff, 0x032618ff,
38 	0x042815ff, 0x052913ff, 0x072a10ff, 0x092a0d00,
39 
40 	0xff0d280c, 0xff0f280a, 0xff112808, 0xff142706,
41 	0xff162605, 0xff192503, 0x001b2302, 0x001d2201,
42 	0x011f1f01, 0x01221d00, 0x02231b00, 0x04241800,
43 	0x052616ff, 0x072713ff, 0x08271100, 0x0a280e00,
44 
45 	0xff0e260d, 0xff10260b, 0xff122609, 0xff142508,
46 	0x00152506, 0x00182305, 0x001b2203, 0x011d2002,
47 	0x011f1f01, 0x02201d01, 0x03221b00, 0x04231801,
48 	0x06241600, 0x08251300, 0x09261100, 0x0b260f00,
49 
50 	0xff0e250e, 0xff10250c, 0x0011250a, 0x00142408,
51 	0x00162307, 0x00182206, 0x011a2104, 0x011c2003,
52 	0x021e1e02, 0x03201c01, 0x04211a01, 0x05221801,
53 	0x07231600, 0x08241400, 0x0a241200, 0x0c241000,
54 
55 	0x000e240e, 0x0010240c, 0x0013230a, 0x00142309,
56 	0x00162208, 0x01182106, 0x011a2005, 0x021b1f04,
57 	0x031d1d03, 0x041e1c02, 0x05201a01, 0x06211801,
58 	0x07221601, 0x09231400, 0x0a231300, 0x0c231100,
59 
60 	0x000f220f, 0x0011220d, 0x0013220b, 0x0015210a,
61 	0x01162108, 0x01182007, 0x02191f06, 0x031a1e05,
62 	0x041c1c04, 0x051d1b03, 0x061f1902, 0x07201801,
63 	0x08211601, 0x0a211500, 0x0b221300, 0x0d221100,
64 
65 	0x0010210f, 0x0011210e, 0x0013210c, 0x0114200b,
66 	0x01161f0a, 0x02171f08, 0x03181e07, 0x031a1d06,
67 	0x041c1c04, 0x051d1a04, 0x071d1903, 0x081e1802,
68 	0x091f1602, 0x0b1f1501, 0x0c211300, 0x0e201200,
69 
70 	0x00102010, 0x0012200e, 0x0013200d, 0x01151f0b,
71 	0x01161f0a, 0x02171e09, 0x03191d07, 0x041a1c06,
72 	0x051b1b05, 0x061c1a04, 0x071d1903, 0x081e1703,
73 	0x0a1f1601, 0x0b1f1501, 0x0d201300, 0x0e201200,
74 
75 	0x00102010, 0x00121f0f, 0x00141f0d, 0x01141f0c,
76 	0x02161e0a, 0x03171d09, 0x03181d08, 0x041a1c06,
77 	0x051b1b05, 0x061c1a04, 0x081c1903, 0x091d1703,
78 	0x0a1e1602, 0x0c1e1501, 0x0d1f1400, 0x0e1f1201,
79 
80 	0x00111e11, 0x00131e0f, 0x01131e0e, 0x02151d0c,
81 	0x02161d0b, 0x03171c0a, 0x04181b09, 0x05191b07,
82 	0x061a1a06, 0x071b1905, 0x091b1804, 0x0a1c1703,
83 	0x0b1d1602, 0x0c1d1502, 0x0e1d1401, 0x0f1e1300,
84 
85 	0x00111e11, 0x00131d10, 0x01141d0e, 0x02151c0d,
86 	0x03161c0b, 0x04171b0a, 0x05171b09, 0x06181a08,
87 	0x07191907, 0x081a1806, 0x091a1805, 0x0a1b1704,
88 	0x0b1c1603, 0x0d1c1502, 0x0e1d1401, 0x0f1d1301,
89 };
90 
91 static int sun8i_ui_scaler_coef_index(unsigned int step)
92 {
93 	unsigned int scale, int_part, float_part;
94 
95 	scale = step >> (SUN8I_UI_SCALER_SCALE_FRAC - 3);
96 	int_part = scale >> 3;
97 	float_part = scale & 0x7;
98 
99 	switch (int_part) {
100 	case 0:
101 		return 0;
102 	case 1:
103 		return float_part;
104 	case 2:
105 		return 8 + (float_part >> 1);
106 	case 3:
107 		return 12;
108 	case 4:
109 		return 13;
110 	default:
111 		return 14;
112 	}
113 }
114 
115 void sun8i_ui_scaler_enable(struct sun8i_mixer *mixer, int layer, bool enable)
116 {
117 	int vi_cnt = mixer->cfg->vi_num;
118 	u32 val;
119 
120 	if (WARN_ON(layer < vi_cnt))
121 		return;
122 
123 	if (enable)
124 		val = SUN8I_SCALER_GSU_CTRL_EN |
125 		      SUN8I_SCALER_GSU_CTRL_COEFF_RDY;
126 	else
127 		val = 0;
128 
129 	regmap_write(mixer->engine.regs,
130 		     SUN8I_SCALER_GSU_CTRL(vi_cnt, layer - vi_cnt), val);
131 }
132 
133 void sun8i_ui_scaler_setup(struct sun8i_mixer *mixer, int layer,
134 			   u32 src_w, u32 src_h, u32 dst_w, u32 dst_h,
135 			   u32 hscale, u32 vscale, u32 hphase, u32 vphase)
136 {
137 	int vi_cnt = mixer->cfg->vi_num;
138 	u32 insize, outsize;
139 	int i, offset;
140 
141 	if (WARN_ON(layer < vi_cnt))
142 		return;
143 
144 	hphase <<= SUN8I_UI_SCALER_PHASE_FRAC - 16;
145 	vphase <<= SUN8I_UI_SCALER_PHASE_FRAC - 16;
146 	hscale <<= SUN8I_UI_SCALER_SCALE_FRAC - 16;
147 	vscale <<= SUN8I_UI_SCALER_SCALE_FRAC - 16;
148 
149 	insize = SUN8I_UI_SCALER_SIZE(src_w, src_h);
150 	outsize = SUN8I_UI_SCALER_SIZE(dst_w, dst_h);
151 
152 	layer -= vi_cnt;
153 
154 	regmap_write(mixer->engine.regs,
155 		     SUN8I_SCALER_GSU_OUTSIZE(vi_cnt, layer), outsize);
156 	regmap_write(mixer->engine.regs,
157 		     SUN8I_SCALER_GSU_INSIZE(vi_cnt, layer), insize);
158 	regmap_write(mixer->engine.regs,
159 		     SUN8I_SCALER_GSU_HSTEP(vi_cnt, layer), hscale);
160 	regmap_write(mixer->engine.regs,
161 		     SUN8I_SCALER_GSU_VSTEP(vi_cnt, layer), vscale);
162 	regmap_write(mixer->engine.regs,
163 		     SUN8I_SCALER_GSU_HPHASE(vi_cnt, layer), hphase);
164 	regmap_write(mixer->engine.regs,
165 		     SUN8I_SCALER_GSU_VPHASE(vi_cnt, layer), vphase);
166 	offset = sun8i_ui_scaler_coef_index(hscale) *
167 			SUN8I_UI_SCALER_COEFF_COUNT;
168 	for (i = 0; i < SUN8I_UI_SCALER_COEFF_COUNT; i++)
169 		regmap_write(mixer->engine.regs,
170 			     SUN8I_SCALER_GSU_HCOEFF(vi_cnt, layer, i),
171 			     lan2coefftab16[offset + i]);
172 }
173