drivers/gpu/drm/amd/display/dc/dsc/rc

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This source file includes following definitions.
get_qp_set
dsc_roundf
dsc_ceil
get_ofs_set
median3
calc_rc_params
   1 #if defined(CONFIG_DRM_AMD_DC_DSC_SUPPORT)
   2 
   3 /*
   4  * Copyright 2017 Advanced Micro Devices, Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors: AMD
  25  *
  26  */
  27 
  28 #include "os_types.h"
  29 #include "rc_calc.h"
  30 #include "qp_tables.h"
  31 
  32 #define table_hash(mode, bpc, max_min) ((mode << 16) | (bpc << 8) | max_min)
  33 
  34 #define MODE_SELECT(val444, val422, val420) \
  35         (cm == CM_444 || cm == CM_RGB) ? (val444) : (cm == CM_422 ? (val422) : (val420))
  36 
  37 
  38 #define TABLE_CASE(mode, bpc, max)   case (table_hash(mode, BPC_##bpc, max)): \
  39         table = qp_table_##mode##_##bpc##bpc_##max; \
  40         table_size = sizeof(qp_table_##mode##_##bpc##bpc_##max)/sizeof(*qp_table_##mode##_##bpc##bpc_##max); \
  41         break
  42 
  43 
  44 void get_qp_set(qp_set qps, enum colour_mode cm, enum bits_per_comp bpc, enum max_min max_min, float bpp)
  45 {
  46         int mode = MODE_SELECT(444, 422, 420);
  47         int sel = table_hash(mode, bpc, max_min);
  48         int table_size = 0;
  49         int index;
  50         const struct qp_entry *table = 0L;
  51 
  52         // alias enum
  53         enum { min = MM_MIN, max = MM_MAX };
  54         switch (sel) {
  55                 TABLE_CASE(444,  8, max);
  56                 TABLE_CASE(444,  8, min);
  57                 TABLE_CASE(444, 10, max);
  58                 TABLE_CASE(444, 10, min);
  59                 TABLE_CASE(444, 12, max);
  60                 TABLE_CASE(444, 12, min);
  61                 TABLE_CASE(422,  8, max);
  62                 TABLE_CASE(422,  8, min);
  63                 TABLE_CASE(422, 10, max);
  64                 TABLE_CASE(422, 10, min);
  65                 TABLE_CASE(422, 12, max);
  66                 TABLE_CASE(422, 12, min);
  67                 TABLE_CASE(420,  8, max);
  68                 TABLE_CASE(420,  8, min);
  69                 TABLE_CASE(420, 10, max);
  70                 TABLE_CASE(420, 10, min);
  71                 TABLE_CASE(420, 12, max);
  72                 TABLE_CASE(420, 12, min);
  73         }
  74 
  75         if (table == 0)
  76                 return;
  77 
  78         index = (bpp - table[0].bpp) * 2;
  79 
  80         /* requested size is bigger than the table */
  81         if (index >= table_size) {
  82                 dm_error("ERROR: Requested rc_calc to find a bpp entry that exceeds the table size\n");
  83                 return;
  84         }
  85 
  86         memcpy(qps, table[index].qps, sizeof(qp_set));
  87 }
  88 
  89 double dsc_roundf(double num)
  90 {
  91         if (num < 0.0)
  92                 num = num - 0.5;
  93         else
  94                 num = num + 0.5;
  95 
  96         return (int)(num);
  97 }
  98 
  99 double dsc_ceil(double num)
 100 {
 101         double retval = (int)num;
 102 
 103         if (retval != num && num > 0)
 104                 retval = num + 1;
 105 
 106         return (int)retval;
 107 }
 108 
 109 void get_ofs_set(qp_set ofs, enum colour_mode mode, float bpp)
 110 {
 111         int   *p = ofs;
 112 
 113         if (mode == CM_444 || mode == CM_RGB) {
 114                 *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))))));
 115                 *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))))));
 116                 *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))))));
 117                 *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))))));
 118                 *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))))));
 119                 *p++ = (bpp <= 12) ? (-6) : ((bpp >= 15) ? (0) : (-6 + dsc_roundf((bpp - 12) * (6 / 3.0))));
 120                 *p++ = (bpp <= 12) ? (-8) : ((bpp >= 15) ? (-2) : (-8 + dsc_roundf((bpp - 12) * (6 / 3.0))));
 121                 *p++ = (bpp <= 12) ? (-8) : ((bpp >= 15) ? (-4) : (-8 + dsc_roundf((bpp - 12) * (4 / 3.0))));
 122                 *p++ = (bpp <= 12) ? (-8) : ((bpp >= 15) ? (-6) : (-8 + dsc_roundf((bpp - 12) * (2 / 3.0))));
 123                 *p++ = (bpp <= 12) ? (-10) : ((bpp >= 15) ? (-8) : (-10 + dsc_roundf((bpp - 12) * (2 / 3.0))));
 124                 *p++ = -10;
 125                 *p++ = (bpp <=  6) ? (-12) : ((bpp >=  8) ? (-10) : (-12 + dsc_roundf((bpp -  6) * (2 / 2.0))));
 126                 *p++ = -12;
 127                 *p++ = -12;
 128                 *p++ = -12;
 129         } else if (mode == CM_422) {
 130                 *p++ = (bpp <=  8) ? (2) : ((bpp >= 10) ? (10) : (2 + dsc_roundf((bpp -  8) * (8 / 2.0))));
 131                 *p++ = (bpp <=  8) ? (0) : ((bpp >= 10) ? (8) : (0 + dsc_roundf((bpp -  8) * (8 / 2.0))));
 132                 *p++ = (bpp <=  8) ? (0) : ((bpp >= 10) ? (6) : (0 + dsc_roundf((bpp -  8) * (6 / 2.0))));
 133                 *p++ = (bpp <=  8) ? (-2) : ((bpp >= 10) ? (4) : (-2 + dsc_roundf((bpp -  8) * (6 / 2.0))));
 134                 *p++ = (bpp <=  8) ? (-4) : ((bpp >= 10) ? (2) : (-4 + dsc_roundf((bpp -  8) * (6 / 2.0))));
 135                 *p++ = (bpp <=  8) ? (-6) : ((bpp >= 10) ? (0) : (-6 + dsc_roundf((bpp -  8) * (6 / 2.0))));
 136                 *p++ = (bpp <=  8) ? (-8) : ((bpp >= 10) ? (-2) : (-8 + dsc_roundf((bpp -  8) * (6 / 2.0))));
 137                 *p++ = (bpp <=  8) ? (-8) : ((bpp >= 10) ? (-4) : (-8 + dsc_roundf((bpp -  8) * (4 / 2.0))));
 138                 *p++ = (bpp <=  8) ? (-8) : ((bpp >= 10) ? (-6) : (-8 + dsc_roundf((bpp -  8) * (2 / 2.0))));
 139                 *p++ = (bpp <=  8) ? (-10) : ((bpp >= 10) ? (-8) : (-10 + dsc_roundf((bpp -  8) * (2 / 2.0))));
 140                 *p++ = -10;
 141                 *p++ = (bpp <=  6) ? (-12) : ((bpp >= 7) ? (-10) : (-12 + dsc_roundf((bpp -  6) * (2.0 / 1))));
 142                 *p++ = -12;
 143                 *p++ = -12;
 144                 *p++ = -12;
 145         } else {
 146                 *p++ = (bpp <=  6) ? (2) : ((bpp >=  8) ? (10) : (2 + dsc_roundf((bpp -  6) * (8 / 2.0))));
 147                 *p++ = (bpp <=  6) ? (0) : ((bpp >=  8) ? (8) : (0 + dsc_roundf((bpp -  6) * (8 / 2.0))));
 148                 *p++ = (bpp <=  6) ? (0) : ((bpp >=  8) ? (6) : (0 + dsc_roundf((bpp -  6) * (6 / 2.0))));
 149                 *p++ = (bpp <=  6) ? (-2) : ((bpp >=  8) ? (4) : (-2 + dsc_roundf((bpp -  6) * (6 / 2.0))));
 150                 *p++ = (bpp <=  6) ? (-4) : ((bpp >=  8) ? (2) : (-4 + dsc_roundf((bpp -  6) * (6 / 2.0))));
 151                 *p++ = (bpp <=  6) ? (-6) : ((bpp >=  8) ? (0) : (-6 + dsc_roundf((bpp -  6) * (6 / 2.0))));
 152                 *p++ = (bpp <=  6) ? (-8) : ((bpp >=  8) ? (-2) : (-8 + dsc_roundf((bpp -  6) * (6 / 2.0))));
 153                 *p++ = (bpp <=  6) ? (-8) : ((bpp >=  8) ? (-4) : (-8 + dsc_roundf((bpp -  6) * (4 / 2.0))));
 154                 *p++ = (bpp <=  6) ? (-8) : ((bpp >=  8) ? (-6) : (-8 + dsc_roundf((bpp -  6) * (2 / 2.0))));
 155                 *p++ = (bpp <=  6) ? (-10) : ((bpp >=  8) ? (-8) : (-10 + dsc_roundf((bpp -  6) * (2 / 2.0))));
 156                 *p++ = -10;
 157                 *p++ = (bpp <=  4) ? (-12) : ((bpp >=  5) ? (-10) : (-12 + dsc_roundf((bpp -  4) * (2 / 1.0))));
 158                 *p++ = -12;
 159                 *p++ = -12;
 160                 *p++ = -12;
 161         }
 162 }
 163 
 164 int median3(int a, int b, int c)
 165 {
 166         if (a > b)
 167                 swap(a, b);
 168         if (b > c)
 169                 swap(b, c);
 170         if (a > b)
 171                 swap(b, c);
 172 
 173         return b;
 174 }
 175 
 176 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)
 177 {
 178         float bpp_group;
 179         float initial_xmit_delay_factor;
 180         int source_bpp;
 181         int padding_pixels;
 182         int i;
 183 
 184         rc->rc_quant_incr_limit0 = ((bpc == BPC_8) ? 11 : (bpc == BPC_10 ? 15 : 19)) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
 185         rc->rc_quant_incr_limit1 = ((bpc == BPC_8) ? 11 : (bpc == BPC_10 ? 15 : 19)) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
 186 
 187         bpp_group = MODE_SELECT(bpp, bpp * 2.0, bpp * 2.0);
 188 
 189         switch (cm) {
 190         case CM_420:
 191                 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)))));
 192                 rc->first_line_bpg_offset   = median3(0, (12 + (int) (0.09 *  min(34, slice_height - 8))), (int)((3 * bpc * 3) - (3 * bpp_group)));
 193                 rc->second_line_bpg_offset  = median3(0, 12, (int)((3 * bpc * 3) - (3 * bpp_group)));
 194                 break;
 195         case CM_422:
 196                 rc->initial_fullness_offset = (bpp >=  8) ? (2048) : ((bpp <=  7) ? (5632) : (5632 - dsc_roundf((bpp - 7) * (3584))));
 197                 rc->first_line_bpg_offset   = median3(0, (12 + (int) (0.09 *  min(34, slice_height - 8))), (int)((3 * bpc * 4) - (3 * bpp_group)));
 198                 rc->second_line_bpg_offset  = 0;
 199                 break;
 200         case CM_444:
 201         case CM_RGB:
 202                 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)))));
 203                 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)));
 204                 rc->second_line_bpg_offset  = 0;
 205                 break;
 206         }
 207 
 208         initial_xmit_delay_factor = (cm == CM_444 || cm == CM_RGB) ? 1.0 : 2.0;
 209         rc->initial_xmit_delay = dsc_roundf(8192.0/2.0/bpp/initial_xmit_delay_factor);
 210 
 211         if (cm == CM_422 || cm == CM_420)
 212                 slice_width /= 2;
 213 
 214         padding_pixels = ((slice_width % 3) != 0) ? (3 - (slice_width % 3)) * (rc->initial_xmit_delay / slice_width) : 0;
 215         if (3 * bpp_group >= (((rc->initial_xmit_delay + 2) / 3) * (3 + (cm == CM_422)))) {
 216                 if ((rc->initial_xmit_delay + padding_pixels) % 3 == 1)
 217                         rc->initial_xmit_delay++;
 218         }
 219 
 220         source_bpp = MODE_SELECT(bpc * 3, bpc * 2, bpc * 1.5);
 221 
 222         rc->flatness_min_qp     = ((bpc == BPC_8) ?  (3) : ((bpc == BPC_10) ? (7)  : (11))) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
 223         rc->flatness_max_qp     = ((bpc == BPC_8) ? (12) : ((bpc == BPC_10) ? (16) : (20))) - ((minor_version == 1 && cm == CM_444) ? 1 : 0);
 224         rc->flatness_det_thresh = 2 << (bpc - 8);
 225 
 226         get_qp_set(rc->qp_min, cm, bpc, MM_MIN, bpp);
 227         get_qp_set(rc->qp_max, cm, bpc, MM_MAX, bpp);
 228         if (cm == CM_444 && minor_version == 1) {
 229                 for (i = 0; i < QP_SET_SIZE; ++i) {
 230                         rc->qp_min[i] = rc->qp_min[i] > 0 ? rc->qp_min[i] - 1 : 0;
 231                         rc->qp_max[i] = rc->qp_max[i] > 0 ? rc->qp_max[i] - 1 : 0;
 232                 }
 233         }
 234         get_ofs_set(rc->ofs, cm, bpp);
 235 
 236         /* fixed parameters */
 237         rc->rc_model_size    = 8192;
 238         rc->rc_edge_factor   = 6;
 239         rc->rc_tgt_offset_hi = 3;
 240         rc->rc_tgt_offset_lo = 3;
 241 
 242         rc->rc_buf_thresh[0] = 896;
 243         rc->rc_buf_thresh[1] = 1792;
 244         rc->rc_buf_thresh[2] = 2688;
 245         rc->rc_buf_thresh[3] = 3584;
 246         rc->rc_buf_thresh[4] = 4480;
 247         rc->rc_buf_thresh[5] = 5376;
 248         rc->rc_buf_thresh[6] = 6272;
 249         rc->rc_buf_thresh[7] = 6720;
 250         rc->rc_buf_thresh[8] = 7168;
 251         rc->rc_buf_thresh[9] = 7616;
 252         rc->rc_buf_thresh[10] = 7744;
 253         rc->rc_buf_thresh[11] = 7872;
 254         rc->rc_buf_thresh[12] = 8000;
 255         rc->rc_buf_thresh[13] = 8064;
 256 }
 257 
 258 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/amd/display/dc/dsc/rc_calc.c

DEFINITIONS
