drivers/gpu/drm/amd/display/dc/dsc/rc_calc.c

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