xref: /netbsd-src/sys/external/bsd/drm2/dist/drm/amd/display/dc/dsc/amdgpu_rc_calc.c (revision 41ec02673d281bbb3d38e6c78504ce6e30c228c1)
1 /*	$NetBSD: amdgpu_rc_calc.c,v 1.2 2021/12/18 23:45:04 riastradh Exp $	*/
2 
3 
4 /*
5  * Copyright 2017 Advanced Micro Devices, Inc.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included in
15  * all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23  * OTHER DEALINGS IN THE SOFTWARE.
24  *
25  * Authors: AMD
26  *
27  */
28 
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: amdgpu_rc_calc.c,v 1.2 2021/12/18 23:45:04 riastradh Exp $");
31 
32 #include "os_types.h"
33 #include "rc_calc.h"
34 #include "qp_tables.h"
35 
36 #define table_hash(mode, bpc, max_min) ((mode << 16) | (bpc << 8) | max_min)
37 
38 #define MODE_SELECT(val444, val422, val420) \
39 	(cm == CM_444 || cm == CM_RGB) ? (val444) : (cm == CM_422 ? (val422) : (val420))
40 
41 
42 #define TABLE_CASE(mode, bpc, max)   case (table_hash(mode, BPC_##bpc, max)): \
43 	table = qp_table_##mode##_##bpc##bpc_##max; \
44 	table_size = sizeof(qp_table_##mode##_##bpc##bpc_##max)/sizeof(*qp_table_##mode##_##bpc##bpc_##max); \
45 	break
46 
47 
get_qp_set(qp_set qps,enum colour_mode cm,enum bits_per_comp bpc,enum max_min max_min,float bpp)48 void get_qp_set(qp_set qps, enum colour_mode cm, enum bits_per_comp bpc, enum max_min max_min, float bpp)
49 {
50 	int mode = MODE_SELECT(444, 422, 420);
51 	int sel = table_hash(mode, bpc, max_min);
52 	int table_size = 0;
53 	int index;
54 	const struct qp_entry *table = 0L;
55 
56 	// alias enum
57 	enum { min = MM_MIN, max = MM_MAX };
58 	switch (sel) {
59 		TABLE_CASE(444,  8, max);
60 		TABLE_CASE(444,  8, min);
61 		TABLE_CASE(444, 10, max);
62 		TABLE_CASE(444, 10, min);
63 		TABLE_CASE(444, 12, max);
64 		TABLE_CASE(444, 12, min);
65 		TABLE_CASE(422,  8, max);
66 		TABLE_CASE(422,  8, min);
67 		TABLE_CASE(422, 10, max);
68 		TABLE_CASE(422, 10, min);
69 		TABLE_CASE(422, 12, max);
70 		TABLE_CASE(422, 12, min);
71 		TABLE_CASE(420,  8, max);
72 		TABLE_CASE(420,  8, min);
73 		TABLE_CASE(420, 10, max);
74 		TABLE_CASE(420, 10, min);
75 		TABLE_CASE(420, 12, max);
76 		TABLE_CASE(420, 12, min);
77 	}
78 
79 	if (table == 0)
80 		return;
81 
82 	index = (bpp - table[0].bpp) * 2;
83 
84 	/* requested size is bigger than the table */
85 	if (index >= table_size) {
86 		dm_error("ERROR: Requested rc_calc to find a bpp entry that exceeds the table size\n");
87 		return;
88 	}
89 
90 	memcpy(qps, table[index].qps, sizeof(qp_set));
91 }
92 
dsc_roundf(double num)93 double dsc_roundf(double num)
94 {
95 	if (num < 0.0)
96 		num = num - 0.5;
97 	else
98 		num = num + 0.5;
99 
100 	return (int)(num);
101 }
102 
dsc_ceil(double num)103 double dsc_ceil(double num)
104 {
105 	double retval = (int)num;
106 
107 	if (retval != num && num > 0)
108 		retval = num + 1;
109 
110 	return (int)retval;
111 }
112 
get_ofs_set(qp_set ofs,enum colour_mode mode,float bpp)113 void get_ofs_set(qp_set ofs, enum colour_mode mode, float bpp)
114 {
115 	int   *p = ofs;
116 
117 	if (mode == CM_444 || mode == CM_RGB) {
118 		*p++ = (bpp <=  6) ? (0) : ((((bpp >=  8) && (bpp <= 12))) ? (2) : ((bpp >= 15) ? (10) : ((((bpp > 6) && (bpp < 8))) ? (0 + dsc_roundf((bpp -  6) * (2 / 2.0))) : (2 + dsc_roundf((bpp - 12) * (8 / 3.0))))));
119 		*p++ = (bpp <=  6) ? (-2) : ((((bpp >=  8) && (bpp <= 12))) ? (0) : ((bpp >= 15) ? (8) : ((((bpp > 6) && (bpp < 8))) ? (-2 + dsc_roundf((bpp -  6) * (2 / 2.0))) : (0 + dsc_roundf((bpp - 12) * (8 / 3.0))))));
120 		*p++ = (bpp <=  6) ? (-2) : ((((bpp >=  8) && (bpp <= 12))) ? (0) : ((bpp >= 15) ? (6) : ((((bpp > 6) && (bpp < 8))) ? (-2 + dsc_roundf((bpp -  6) * (2 / 2.0))) : (0 + dsc_roundf((bpp - 12) * (6 / 3.0))))));
121 		*p++ = (bpp <=  6) ? (-4) : ((((bpp >=  8) && (bpp <= 12))) ? (-2) : ((bpp >= 15) ? (4) : ((((bpp > 6) && (bpp < 8))) ? (-4 + dsc_roundf((bpp -  6) * (2 / 2.0))) : (-2 + dsc_roundf((bpp - 12) * (6 / 3.0))))));
122 		*p++ = (bpp <=  6) ? (-6) : ((((bpp >=  8) && (bpp <= 12))) ? (-4) : ((bpp >= 15) ? (2) : ((((bpp > 6) && (bpp < 8))) ? (-6 + dsc_roundf((bpp -  6) * (2 / 2.0))) : (-4 + dsc_roundf((bpp - 12) * (6 / 3.0))))));
123 		*p++ = (bpp <= 12) ? (-6) : ((bpp >= 15) ? (0) : (-6 + dsc_roundf((bpp - 12) * (6 / 3.0))));
124 		*p++ = (bpp <= 12) ? (-8) : ((bpp >= 15) ? (-2) : (-8 + dsc_roundf((bpp - 12) * (6 / 3.0))));
125 		*p++ = (bpp <= 12) ? (-8) : ((bpp >= 15) ? (-4) : (-8 + dsc_roundf((bpp - 12) * (4 / 3.0))));
126 		*p++ = (bpp <= 12) ? (-8) : ((bpp >= 15) ? (-6) : (-8 + dsc_roundf((bpp - 12) * (2 / 3.0))));
127 		*p++ = (bpp <= 12) ? (-10) : ((bpp >= 15) ? (-8) : (-10 + dsc_roundf((bpp - 12) * (2 / 3.0))));
128 		*p++ = -10;
129 		*p++ = (bpp <=  6) ? (-12) : ((bpp >=  8) ? (-10) : (-12 + dsc_roundf((bpp -  6) * (2 / 2.0))));
130 		*p++ = -12;
131 		*p++ = -12;
132 		*p++ = -12;
133 	} else if (mode == CM_422) {
134 		*p++ = (bpp <=  8) ? (2) : ((bpp >= 10) ? (10) : (2 + dsc_roundf((bpp -  8) * (8 / 2.0))));
135 		*p++ = (bpp <=  8) ? (0) : ((bpp >= 10) ? (8) : (0 + dsc_roundf((bpp -  8) * (8 / 2.0))));
136 		*p++ = (bpp <=  8) ? (0) : ((bpp >= 10) ? (6) : (0 + dsc_roundf((bpp -  8) * (6 / 2.0))));
137 		*p++ = (bpp <=  8) ? (-2) : ((bpp >= 10) ? (4) : (-2 + dsc_roundf((bpp -  8) * (6 / 2.0))));
138 		*p++ = (bpp <=  8) ? (-4) : ((bpp >= 10) ? (2) : (-4 + dsc_roundf((bpp -  8) * (6 / 2.0))));
139 		*p++ = (bpp <=  8) ? (-6) : ((bpp >= 10) ? (0) : (-6 + dsc_roundf((bpp -  8) * (6 / 2.0))));
140 		*p++ = (bpp <=  8) ? (-8) : ((bpp >= 10) ? (-2) : (-8 + dsc_roundf((bpp -  8) * (6 / 2.0))));
141 		*p++ = (bpp <=  8) ? (-8) : ((bpp >= 10) ? (-4) : (-8 + dsc_roundf((bpp -  8) * (4 / 2.0))));
142 		*p++ = (bpp <=  8) ? (-8) : ((bpp >= 10) ? (-6) : (-8 + dsc_roundf((bpp -  8) * (2 / 2.0))));
143 		*p++ = (bpp <=  8) ? (-10) : ((bpp >= 10) ? (-8) : (-10 + dsc_roundf((bpp -  8) * (2 / 2.0))));
144 		*p++ = -10;
145 		*p++ = (bpp <=  6) ? (-12) : ((bpp >= 7) ? (-10) : (-12 + dsc_roundf((bpp -  6) * (2.0 / 1))));
146 		*p++ = -12;
147 		*p++ = -12;
148 		*p++ = -12;
149 	} else {
150 		*p++ = (bpp <=  6) ? (2) : ((bpp >=  8) ? (10) : (2 + dsc_roundf((bpp -  6) * (8 / 2.0))));
151 		*p++ = (bpp <=  6) ? (0) : ((bpp >=  8) ? (8) : (0 + dsc_roundf((bpp -  6) * (8 / 2.0))));
152 		*p++ = (bpp <=  6) ? (0) : ((bpp >=  8) ? (6) : (0 + dsc_roundf((bpp -  6) * (6 / 2.0))));
153 		*p++ = (bpp <=  6) ? (-2) : ((bpp >=  8) ? (4) : (-2 + dsc_roundf((bpp -  6) * (6 / 2.0))));
154 		*p++ = (bpp <=  6) ? (-4) : ((bpp >=  8) ? (2) : (-4 + dsc_roundf((bpp -  6) * (6 / 2.0))));
155 		*p++ = (bpp <=  6) ? (-6) : ((bpp >=  8) ? (0) : (-6 + dsc_roundf((bpp -  6) * (6 / 2.0))));
156 		*p++ = (bpp <=  6) ? (-8) : ((bpp >=  8) ? (-2) : (-8 + dsc_roundf((bpp -  6) * (6 / 2.0))));
157 		*p++ = (bpp <=  6) ? (-8) : ((bpp >=  8) ? (-4) : (-8 + dsc_roundf((bpp -  6) * (4 / 2.0))));
158 		*p++ = (bpp <=  6) ? (-8) : ((bpp >=  8) ? (-6) : (-8 + dsc_roundf((bpp -  6) * (2 / 2.0))));
159 		*p++ = (bpp <=  6) ? (-10) : ((bpp >=  8) ? (-8) : (-10 + dsc_roundf((bpp -  6) * (2 / 2.0))));
160 		*p++ = -10;
161 		*p++ = (bpp <=  4) ? (-12) : ((bpp >=  5) ? (-10) : (-12 + dsc_roundf((bpp -  4) * (2 / 1.0))));
162 		*p++ = -12;
163 		*p++ = -12;
164 		*p++ = -12;
165 	}
166 }
167 
median3(int a,int b,int c)168 int median3(int a, int b, int c)
169 {
170 	if (a > b)
171 		swap(a, b);
172 	if (b > c)
173 		swap(b, c);
174 	if (a > b)
175 		swap(b, c);
176 
177 	return b;
178 }
179 
calc_rc_params(struct rc_params * rc,enum colour_mode cm,enum bits_per_comp bpc,float bpp,int slice_width,int slice_height,int minor_version)180 void calc_rc_params(struct rc_params *rc, enum colour_mode cm, enum bits_per_comp bpc, float bpp, int slice_width, int slice_height, int minor_version)
181 {
182 	float bpp_group;
183 	float initial_xmit_delay_factor;
184 	int padding_pixels;
185 	int i;
186 
187 	rc->rc_quant_incr_limit0 = ((bpc == BPC_8) ? 11 : (bpc == BPC_10 ? 15 : 19)) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
188 	rc->rc_quant_incr_limit1 = ((bpc == BPC_8) ? 11 : (bpc == BPC_10 ? 15 : 19)) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
189 
190 	bpp_group = MODE_SELECT(bpp, bpp * 2.0, bpp * 2.0);
191 
192 	switch (cm) {
193 	case CM_420:
194 		rc->initial_fullness_offset = (bpp >=  6) ? (2048) : ((bpp <=  4) ? (6144) : ((((bpp >  4) && (bpp <=  5))) ? (6144 - dsc_roundf((bpp - 4) * (512))) : (5632 - dsc_roundf((bpp -  5) * (3584)))));
195 		rc->first_line_bpg_offset   = median3(0, (12 + (int) (0.09 *  min(34, slice_height - 8))), (int)((3 * bpc * 3) - (3 * bpp_group)));
196 		rc->second_line_bpg_offset  = median3(0, 12, (int)((3 * bpc * 3) - (3 * bpp_group)));
197 		break;
198 	case CM_422:
199 		rc->initial_fullness_offset = (bpp >=  8) ? (2048) : ((bpp <=  7) ? (5632) : (5632 - dsc_roundf((bpp - 7) * (3584))));
200 		rc->first_line_bpg_offset   = median3(0, (12 + (int) (0.09 *  min(34, slice_height - 8))), (int)((3 * bpc * 4) - (3 * bpp_group)));
201 		rc->second_line_bpg_offset  = 0;
202 		break;
203 	case CM_444:
204 	case CM_RGB:
205 		rc->initial_fullness_offset = (bpp >= 12) ? (2048) : ((bpp <=  8) ? (6144) : ((((bpp >  8) && (bpp <= 10))) ? (6144 - dsc_roundf((bpp - 8) * (512 / 2))) : (5632 - dsc_roundf((bpp - 10) * (3584 / 2)))));
206 		rc->first_line_bpg_offset   = median3(0, (12 + (int) (0.09 *  min(34, slice_height - 8))), (int)(((3 * bpc + (cm == CM_444 ? 0 : 2)) * 3) - (3 * bpp_group)));
207 		rc->second_line_bpg_offset  = 0;
208 		break;
209 	}
210 
211 	initial_xmit_delay_factor = (cm == CM_444 || cm == CM_RGB) ? 1.0 : 2.0;
212 	rc->initial_xmit_delay = dsc_roundf(8192.0/2.0/bpp/initial_xmit_delay_factor);
213 
214 	if (cm == CM_422 || cm == CM_420)
215 		slice_width /= 2;
216 
217 	padding_pixels = ((slice_width % 3) != 0) ? (3 - (slice_width % 3)) * (rc->initial_xmit_delay / slice_width) : 0;
218 	if (3 * bpp_group >= (((rc->initial_xmit_delay + 2) / 3) * (3 + (cm == CM_422)))) {
219 		if ((rc->initial_xmit_delay + padding_pixels) % 3 == 1)
220 			rc->initial_xmit_delay++;
221 	}
222 
223 	rc->flatness_min_qp     = ((bpc == BPC_8) ?  (3) : ((bpc == BPC_10) ? (7)  : (11))) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
224 	rc->flatness_max_qp     = ((bpc == BPC_8) ? (12) : ((bpc == BPC_10) ? (16) : (20))) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
225 	rc->flatness_det_thresh = 2 << (bpc - 8);
226 
227 	get_qp_set(rc->qp_min, cm, bpc, MM_MIN, bpp);
228 	get_qp_set(rc->qp_max, cm, bpc, MM_MAX, bpp);
229 	if (cm == CM_444 && minor_version == 1) {
230 		for (i = 0; i < QP_SET_SIZE; ++i) {
231 			rc->qp_min[i] = rc->qp_min[i] > 0 ? rc->qp_min[i] - 1 : 0;
232 			rc->qp_max[i] = rc->qp_max[i] > 0 ? rc->qp_max[i] - 1 : 0;
233 		}
234 	}
235 	get_ofs_set(rc->ofs, cm, bpp);
236 
237 	/* fixed parameters */
238 	rc->rc_model_size    = 8192;
239 	rc->rc_edge_factor   = 6;
240 	rc->rc_tgt_offset_hi = 3;
241 	rc->rc_tgt_offset_lo = 3;
242 
243 	rc->rc_buf_thresh[0] = 896;
244 	rc->rc_buf_thresh[1] = 1792;
245 	rc->rc_buf_thresh[2] = 2688;
246 	rc->rc_buf_thresh[3] = 3584;
247 	rc->rc_buf_thresh[4] = 4480;
248 	rc->rc_buf_thresh[5] = 5376;
249 	rc->rc_buf_thresh[6] = 6272;
250 	rc->rc_buf_thresh[7] = 6720;
251 	rc->rc_buf_thresh[8] = 7168;
252 	rc->rc_buf_thresh[9] = 7616;
253 	rc->rc_buf_thresh[10] = 7744;
254 	rc->rc_buf_thresh[11] = 7872;
255 	rc->rc_buf_thresh[12] = 8000;
256 	rc->rc_buf_thresh[13] = 8064;
257 }
258 
259