drivers/gpu/drm/msm/dsi/phy/dsi_phy.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/clk-provider.h>
   7 #include <linux/platform_device.h>
   8 #include <dt-bindings/phy/phy.h>
   9
  10 #include "dsi_phy.h"
  11
  12 #define S_DIV_ROUND_UP(n, d)    \
  13         (((n) >= 0) ? (((n) + (d) - 1) / (d)) : (((n) - (d) + 1) / (d)))
  14
  15 static inline s32 linear_inter(s32 tmax, s32 tmin, s32 percent,
  16                                 s32 min_result, bool even)
  17 {
  18         s32 v;
  19
  20         v = (tmax - tmin) * percent;
  21         v = S_DIV_ROUND_UP(v, 100) + tmin;
  22         if (even && (v & 0x1))
  23                 return max_t(s32, min_result, v - 1);
  24         else
  25                 return max_t(s32, min_result, v);
  26 }
  27
  28 static void dsi_dphy_timing_calc_clk_zero(struct msm_dsi_dphy_timing *timing,
  29                                         s32 ui, s32 coeff, s32 pcnt)
  30 {
  31         s32 tmax, tmin, clk_z;
  32         s32 temp;
  33
  34         /* reset */
  35         temp = 300 * coeff - ((timing->clk_prepare >> 1) + 1) * 2 * ui;
  36         tmin = S_DIV_ROUND_UP(temp, ui) - 2;
  37         if (tmin > 255) {
  38                 tmax = 511;
  39                 clk_z = linear_inter(2 * tmin, tmin, pcnt, 0, true);
  40         } else {
  41                 tmax = 255;
  42                 clk_z = linear_inter(tmax, tmin, pcnt, 0, true);
  43         }
  44
  45         /* adjust */
  46         temp = (timing->hs_rqst + timing->clk_prepare + clk_z) & 0x7;
  47         timing->clk_zero = clk_z + 8 - temp;
  48 }
  49
  50 int msm_dsi_dphy_timing_calc(struct msm_dsi_dphy_timing *timing,
  51                              struct msm_dsi_phy_clk_request *clk_req)
  52 {
  53         const unsigned long bit_rate = clk_req->bitclk_rate;
  54         const unsigned long esc_rate = clk_req->escclk_rate;
  55         s32 ui, lpx;
  56         s32 tmax, tmin;
  57         s32 pcnt0 = 10;
  58         s32 pcnt1 = (bit_rate > 1200000000) ? 15 : 10;
  59         s32 pcnt2 = 10;
  60         s32 pcnt3 = (bit_rate > 180000000) ? 10 : 40;
  61         s32 coeff = 1000; /* Precision, should avoid overflow */
  62         s32 temp;
  63
  64         if (!bit_rate || !esc_rate)
  65                 return -EINVAL;
  66
  67         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
  68         lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000);
  69
  70         tmax = S_DIV_ROUND_UP(95 * coeff, ui) - 2;
  71         tmin = S_DIV_ROUND_UP(38 * coeff, ui) - 2;
  72         timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, true);
  73
  74         temp = lpx / ui;
  75         if (temp & 0x1)
  76                 timing->hs_rqst = temp;
  77         else
  78                 timing->hs_rqst = max_t(s32, 0, temp - 2);
  79
  80         /* Calculate clk_zero after clk_prepare and hs_rqst */
  81         dsi_dphy_timing_calc_clk_zero(timing, ui, coeff, pcnt2);
  82
  83         temp = 105 * coeff + 12 * ui - 20 * coeff;
  84         tmax = S_DIV_ROUND_UP(temp, ui) - 2;
  85         tmin = S_DIV_ROUND_UP(60 * coeff, ui) - 2;
  86         timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, true);
  87
  88         temp = 85 * coeff + 6 * ui;
  89         tmax = S_DIV_ROUND_UP(temp, ui) - 2;
  90         temp = 40 * coeff + 4 * ui;
  91         tmin = S_DIV_ROUND_UP(temp, ui) - 2;
  92         timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, true);
  93
  94         tmax = 255;
  95         temp = ((timing->hs_prepare >> 1) + 1) * 2 * ui + 2 * ui;
  96         temp = 145 * coeff + 10 * ui - temp;
  97         tmin = S_DIV_ROUND_UP(temp, ui) - 2;
  98         timing->hs_zero = linear_inter(tmax, tmin, pcnt2, 24, true);
  99
 100         temp = 105 * coeff + 12 * ui - 20 * coeff;
 101         tmax = S_DIV_ROUND_UP(temp, ui) - 2;
 102         temp = 60 * coeff + 4 * ui;
 103         tmin = DIV_ROUND_UP(temp, ui) - 2;
 104         timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, true);
 105
 106         tmax = 255;
 107         tmin = S_DIV_ROUND_UP(100 * coeff, ui) - 2;
 108         timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, true);
 109
 110         tmax = 63;
 111         temp = ((timing->hs_exit >> 1) + 1) * 2 * ui;
 112         temp = 60 * coeff + 52 * ui - 24 * ui - temp;
 113         tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1;
 114         timing->shared_timings.clk_post = linear_inter(tmax, tmin, pcnt2, 0,
 115                                                        false);
 116         tmax = 63;
 117         temp = ((timing->clk_prepare >> 1) + 1) * 2 * ui;
 118         temp += ((timing->clk_zero >> 1) + 1) * 2 * ui;
 119         temp += 8 * ui + lpx;
 120         tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1;
 121         if (tmin > tmax) {
 122                 temp = linear_inter(2 * tmax, tmin, pcnt2, 0, false);
 123                 timing->shared_timings.clk_pre = temp >> 1;
 124                 timing->shared_timings.clk_pre_inc_by_2 = true;
 125         } else {
 126                 timing->shared_timings.clk_pre =
 127                                 linear_inter(tmax, tmin, pcnt2, 0, false);
 128                 timing->shared_timings.clk_pre_inc_by_2 = false;
 129         }
 130
 131         timing->ta_go = 3;
 132         timing->ta_sure = 0;
 133         timing->ta_get = 4;
 134
 135         DBG("PHY timings: %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
 136                 timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 137                 timing->shared_timings.clk_pre_inc_by_2, timing->clk_zero,
 138                 timing->clk_trail, timing->clk_prepare, timing->hs_exit,
 139                 timing->hs_zero, timing->hs_prepare, timing->hs_trail,
 140                 timing->hs_rqst);
 141
 142         return 0;
 143 }
 144
 145 int msm_dsi_dphy_timing_calc_v2(struct msm_dsi_dphy_timing *timing,
 146                                 struct msm_dsi_phy_clk_request *clk_req)
 147 {
 148         const unsigned long bit_rate = clk_req->bitclk_rate;
 149         const unsigned long esc_rate = clk_req->escclk_rate;
 150         s32 ui, ui_x8;
 151         s32 tmax, tmin;
 152         s32 pcnt0 = 50;
 153         s32 pcnt1 = 50;
 154         s32 pcnt2 = 10;
 155         s32 pcnt3 = 30;
 156         s32 pcnt4 = 10;
 157         s32 pcnt5 = 2;
 158         s32 coeff = 1000; /* Precision, should avoid overflow */
 159         s32 hb_en, hb_en_ckln, pd_ckln, pd;
 160         s32 val, val_ckln;
 161         s32 temp;
 162
 163         if (!bit_rate || !esc_rate)
 164                 return -EINVAL;
 165
 166         timing->hs_halfbyte_en = 0;
 167         hb_en = 0;
 168         timing->hs_halfbyte_en_ckln = 0;
 169         hb_en_ckln = 0;
 170         timing->hs_prep_dly_ckln = (bit_rate > 100000000) ? 0 : 3;
 171         pd_ckln = timing->hs_prep_dly_ckln;
 172         timing->hs_prep_dly = (bit_rate > 120000000) ? 0 : 1;
 173         pd = timing->hs_prep_dly;
 174
 175         val = (hb_en << 2) + (pd << 1);
 176         val_ckln = (hb_en_ckln << 2) + (pd_ckln << 1);
 177
 178         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
 179         ui_x8 = ui << 3;
 180
 181         temp = S_DIV_ROUND_UP(38 * coeff - val_ckln * ui, ui_x8);
 182         tmin = max_t(s32, temp, 0);
 183         temp = (95 * coeff - val_ckln * ui) / ui_x8;
 184         tmax = max_t(s32, temp, 0);
 185         timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, false);
 186
 187         temp = 300 * coeff - ((timing->clk_prepare << 3) + val_ckln) * ui;
 188         tmin = S_DIV_ROUND_UP(temp - 11 * ui, ui_x8) - 3;
 189         tmax = (tmin > 255) ? 511 : 255;
 190         timing->clk_zero = linear_inter(tmax, tmin, pcnt5, 0, false);
 191
 192         tmin = DIV_ROUND_UP(60 * coeff + 3 * ui, ui_x8);
 193         temp = 105 * coeff + 12 * ui - 20 * coeff;
 194         tmax = (temp + 3 * ui) / ui_x8;
 195         timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 196
 197         temp = S_DIV_ROUND_UP(40 * coeff + 4 * ui - val * ui, ui_x8);
 198         tmin = max_t(s32, temp, 0);
 199         temp = (85 * coeff + 6 * ui - val * ui) / ui_x8;
 200         tmax = max_t(s32, temp, 0);
 201         timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, false);
 202
 203         temp = 145 * coeff + 10 * ui - ((timing->hs_prepare << 3) + val) * ui;
 204         tmin = S_DIV_ROUND_UP(temp - 11 * ui, ui_x8) - 3;
 205         tmax = 255;
 206         timing->hs_zero = linear_inter(tmax, tmin, pcnt4, 0, false);
 207
 208         tmin = DIV_ROUND_UP(60 * coeff + 4 * ui + 3 * ui, ui_x8);
 209         temp = 105 * coeff + 12 * ui - 20 * coeff;
 210         tmax = (temp + 3 * ui) / ui_x8;
 211         timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 212
 213         temp = 50 * coeff + ((hb_en << 2) - 8) * ui;
 214         timing->hs_rqst = S_DIV_ROUND_UP(temp, ui_x8);
 215
 216         tmin = DIV_ROUND_UP(100 * coeff, ui_x8) - 1;
 217         tmax = 255;
 218         timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, false);
 219
 220         temp = 50 * coeff + ((hb_en_ckln << 2) - 8) * ui;
 221         timing->hs_rqst_ckln = S_DIV_ROUND_UP(temp, ui_x8);
 222
 223         temp = 60 * coeff + 52 * ui - 43 * ui;
 224         tmin = DIV_ROUND_UP(temp, ui_x8) - 1;
 225         tmax = 63;
 226         timing->shared_timings.clk_post =
 227                                 linear_inter(tmax, tmin, pcnt2, 0, false);
 228
 229         temp = 8 * ui + ((timing->clk_prepare << 3) + val_ckln) * ui;
 230         temp += (((timing->clk_zero + 3) << 3) + 11 - (pd_ckln << 1)) * ui;
 231         temp += hb_en_ckln ? (((timing->hs_rqst_ckln << 3) + 4) * ui) :
 232                                 (((timing->hs_rqst_ckln << 3) + 8) * ui);
 233         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 234         tmax = 63;
 235         if (tmin > tmax) {
 236                 temp = linear_inter(tmax << 1, tmin, pcnt2, 0, false);
 237                 timing->shared_timings.clk_pre = temp >> 1;
 238                 timing->shared_timings.clk_pre_inc_by_2 = 1;
 239         } else {
 240                 timing->shared_timings.clk_pre =
 241                                 linear_inter(tmax, tmin, pcnt2, 0, false);
 242                 timing->shared_timings.clk_pre_inc_by_2 = 0;
 243         }
 244
 245         timing->ta_go = 3;
 246         timing->ta_sure = 0;
 247         timing->ta_get = 4;
 248
 249         DBG("%d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
 250             timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 251             timing->shared_timings.clk_pre_inc_by_2, timing->clk_zero,
 252             timing->clk_trail, timing->clk_prepare, timing->hs_exit,
 253             timing->hs_zero, timing->hs_prepare, timing->hs_trail,
 254             timing->hs_rqst, timing->hs_rqst_ckln, timing->hs_halfbyte_en,
 255             timing->hs_halfbyte_en_ckln, timing->hs_prep_dly,
 256             timing->hs_prep_dly_ckln);
 257
 258         return 0;
 259 }
 260
 261 int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
 262         struct msm_dsi_phy_clk_request *clk_req)
 263 {
 264         const unsigned long bit_rate = clk_req->bitclk_rate;
 265         const unsigned long esc_rate = clk_req->escclk_rate;
 266         s32 ui, ui_x8;
 267         s32 tmax, tmin;
 268         s32 pcnt0 = 50;
 269         s32 pcnt1 = 50;
 270         s32 pcnt2 = 10;
 271         s32 pcnt3 = 30;
 272         s32 pcnt4 = 10;
 273         s32 pcnt5 = 2;
 274         s32 coeff = 1000; /* Precision, should avoid overflow */
 275         s32 hb_en, hb_en_ckln;
 276         s32 temp;
 277
 278         if (!bit_rate || !esc_rate)
 279                 return -EINVAL;
 280
 281         timing->hs_halfbyte_en = 0;
 282         hb_en = 0;
 283         timing->hs_halfbyte_en_ckln = 0;
 284         hb_en_ckln = 0;
 285
 286         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
 287         ui_x8 = ui << 3;
 288
 289         temp = S_DIV_ROUND_UP(38 * coeff, ui_x8);
 290         tmin = max_t(s32, temp, 0);
 291         temp = (95 * coeff) / ui_x8;
 292         tmax = max_t(s32, temp, 0);
 293         timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, false);
 294
 295         temp = 300 * coeff - (timing->clk_prepare << 3) * ui;
 296         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 297         tmax = (tmin > 255) ? 511 : 255;
 298         timing->clk_zero = linear_inter(tmax, tmin, pcnt5, 0, false);
 299
 300         tmin = DIV_ROUND_UP(60 * coeff + 3 * ui, ui_x8);
 301         temp = 105 * coeff + 12 * ui - 20 * coeff;
 302         tmax = (temp + 3 * ui) / ui_x8;
 303         timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 304
 305         temp = S_DIV_ROUND_UP(40 * coeff + 4 * ui, ui_x8);
 306         tmin = max_t(s32, temp, 0);
 307         temp = (85 * coeff + 6 * ui) / ui_x8;
 308         tmax = max_t(s32, temp, 0);
 309         timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, false);
 310
 311         temp = 145 * coeff + 10 * ui - (timing->hs_prepare << 3) * ui;
 312         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 313         tmax = 255;
 314         timing->hs_zero = linear_inter(tmax, tmin, pcnt4, 0, false);
 315
 316         tmin = DIV_ROUND_UP(60 * coeff + 4 * ui, ui_x8) - 1;
 317         temp = 105 * coeff + 12 * ui - 20 * coeff;
 318         tmax = (temp / ui_x8) - 1;
 319         timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 320
 321         temp = 50 * coeff + ((hb_en << 2) - 8) * ui;
 322         timing->hs_rqst = S_DIV_ROUND_UP(temp, ui_x8);
 323
 324         tmin = DIV_ROUND_UP(100 * coeff, ui_x8) - 1;
 325         tmax = 255;
 326         timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, false);
 327
 328         temp = 50 * coeff + ((hb_en_ckln << 2) - 8) * ui;
 329         timing->hs_rqst_ckln = S_DIV_ROUND_UP(temp, ui_x8);
 330
 331         temp = 60 * coeff + 52 * ui - 43 * ui;
 332         tmin = DIV_ROUND_UP(temp, ui_x8) - 1;
 333         tmax = 63;
 334         timing->shared_timings.clk_post =
 335                 linear_inter(tmax, tmin, pcnt2, 0, false);
 336
 337         temp = 8 * ui + (timing->clk_prepare << 3) * ui;
 338         temp += (((timing->clk_zero + 3) << 3) + 11) * ui;
 339         temp += hb_en_ckln ? (((timing->hs_rqst_ckln << 3) + 4) * ui) :
 340                 (((timing->hs_rqst_ckln << 3) + 8) * ui);
 341         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 342         tmax = 63;
 343         if (tmin > tmax) {
 344                 temp = linear_inter(tmax << 1, tmin, pcnt2, 0, false);
 345                 timing->shared_timings.clk_pre = temp >> 1;
 346                 timing->shared_timings.clk_pre_inc_by_2 = 1;
 347         } else {
 348                 timing->shared_timings.clk_pre =
 349                         linear_inter(tmax, tmin, pcnt2, 0, false);
 350                 timing->shared_timings.clk_pre_inc_by_2 = 0;
 351         }
 352
 353         timing->shared_timings.byte_intf_clk_div_2 = true;
 354
 355         timing->ta_go = 3;
 356         timing->ta_sure = 0;
 357         timing->ta_get = 4;
 358
 359         DBG("%d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
 360                 timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 361                 timing->shared_timings.clk_pre_inc_by_2, timing->clk_zero,
 362                 timing->clk_trail, timing->clk_prepare, timing->hs_exit,
 363                 timing->hs_zero, timing->hs_prepare, timing->hs_trail,
 364                 timing->hs_rqst, timing->hs_rqst_ckln, timing->hs_halfbyte_en,
 365                 timing->hs_halfbyte_en_ckln, timing->hs_prep_dly,
 366                 timing->hs_prep_dly_ckln);
 367
 368         return 0;
 369 }
 370
 371 int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
 372         struct msm_dsi_phy_clk_request *clk_req)
 373 {
 374         const unsigned long bit_rate = clk_req->bitclk_rate;
 375         const unsigned long esc_rate = clk_req->escclk_rate;
 376         s32 ui, ui_x8;
 377         s32 tmax, tmin;
 378         s32 pcnt_clk_prep = 50;
 379         s32 pcnt_clk_zero = 2;
 380         s32 pcnt_clk_trail = 30;
 381         s32 pcnt_hs_prep = 50;
 382         s32 pcnt_hs_zero = 10;
 383         s32 pcnt_hs_trail = 30;
 384         s32 pcnt_hs_exit = 10;
 385         s32 coeff = 1000; /* Precision, should avoid overflow */
 386         s32 hb_en;
 387         s32 temp;
 388
 389         if (!bit_rate || !esc_rate)
 390                 return -EINVAL;
 391
 392         hb_en = 0;
 393
 394         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
 395         ui_x8 = ui << 3;
 396
 397         /* TODO: verify these calculations against latest downstream driver
 398          * everything except clk_post/clk_pre uses calculations from v3 based
 399          * on the downstream driver having the same calculations for v3 and v4
 400          */
 401
 402         temp = S_DIV_ROUND_UP(38 * coeff, ui_x8);
 403         tmin = max_t(s32, temp, 0);
 404         temp = (95 * coeff) / ui_x8;
 405         tmax = max_t(s32, temp, 0);
 406         timing->clk_prepare = linear_inter(tmax, tmin, pcnt_clk_prep, 0, false);
 407
 408         temp = 300 * coeff - (timing->clk_prepare << 3) * ui;
 409         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 410         tmax = (tmin > 255) ? 511 : 255;
 411         timing->clk_zero = linear_inter(tmax, tmin, pcnt_clk_zero, 0, false);
 412
 413         tmin = DIV_ROUND_UP(60 * coeff + 3 * ui, ui_x8);
 414         temp = 105 * coeff + 12 * ui - 20 * coeff;
 415         tmax = (temp + 3 * ui) / ui_x8;
 416         timing->clk_trail = linear_inter(tmax, tmin, pcnt_clk_trail, 0, false);
 417
 418         temp = S_DIV_ROUND_UP(40 * coeff + 4 * ui, ui_x8);
 419         tmin = max_t(s32, temp, 0);
 420         temp = (85 * coeff + 6 * ui) / ui_x8;
 421         tmax = max_t(s32, temp, 0);
 422         timing->hs_prepare = linear_inter(tmax, tmin, pcnt_hs_prep, 0, false);
 423
 424         temp = 145 * coeff + 10 * ui - (timing->hs_prepare << 3) * ui;
 425         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 426         tmax = 255;
 427         timing->hs_zero = linear_inter(tmax, tmin, pcnt_hs_zero, 0, false);
 428
 429         tmin = DIV_ROUND_UP(60 * coeff + 4 * ui, ui_x8) - 1;
 430         temp = 105 * coeff + 12 * ui - 20 * coeff;
 431         tmax = (temp / ui_x8) - 1;
 432         timing->hs_trail = linear_inter(tmax, tmin, pcnt_hs_trail, 0, false);
 433
 434         temp = 50 * coeff + ((hb_en << 2) - 8) * ui;
 435         timing->hs_rqst = S_DIV_ROUND_UP(temp, ui_x8);
 436
 437         tmin = DIV_ROUND_UP(100 * coeff, ui_x8) - 1;
 438         tmax = 255;
 439         timing->hs_exit = linear_inter(tmax, tmin, pcnt_hs_exit, 0, false);
 440
 441         /* recommended min
 442          * = roundup((mipi_min_ns + t_hs_trail_ns)/(16*bit_clk_ns), 0) - 1
 443          */
 444         temp = 60 * coeff + 52 * ui + + (timing->hs_trail + 1) * ui_x8;
 445         tmin = DIV_ROUND_UP(temp, 16 * ui) - 1;
 446         tmax = 255;
 447         timing->shared_timings.clk_post = linear_inter(tmax, tmin, 5, 0, false);
 448
 449         /* recommended min
 450          * val1 = (tlpx_ns + clk_prepare_ns + clk_zero_ns + hs_rqst_ns)
 451          * val2 = (16 * bit_clk_ns)
 452          * final = roundup(val1/val2, 0) - 1
 453          */
 454         temp = 52 * coeff + (timing->clk_prepare + timing->clk_zero + 1) * ui_x8 + 54 * coeff;
 455         tmin = DIV_ROUND_UP(temp, 16 * ui) - 1;
 456         tmax = 255;
 457         timing->shared_timings.clk_pre = DIV_ROUND_UP((tmax - tmin) * 125, 10000) + tmin;
 458
 459         timing->shared_timings.byte_intf_clk_div_2 = true;
 460
 461         DBG("%d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
 462                 timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 463                 timing->clk_zero, timing->clk_trail, timing->clk_prepare, timing->hs_exit,
 464                 timing->hs_zero, timing->hs_prepare, timing->hs_trail, timing->hs_rqst);
 465
 466         return 0;
 467 }
 468
 469 int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
 470         struct msm_dsi_phy_clk_request *clk_req)
 471 {
 472         const unsigned long bit_rate = clk_req->bitclk_rate;
 473         const unsigned long esc_rate = clk_req->escclk_rate;
 474         s32 ui, ui_x7;
 475         s32 tmax, tmin;
 476         s32 coeff = 1000; /* Precision, should avoid overflow */
 477         s32 temp;
 478
 479         if (!bit_rate || !esc_rate)
 480                 return -EINVAL;
 481
 482         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
 483         ui_x7 = ui * 7;
 484
 485         temp = S_DIV_ROUND_UP(38 * coeff, ui_x7);
 486         tmin = max_t(s32, temp, 0);
 487         temp = (95 * coeff) / ui_x7;
 488         tmax = max_t(s32, temp, 0);
 489         timing->clk_prepare = linear_inter(tmax, tmin, 50, 0, false);
 490
 491         tmin = DIV_ROUND_UP(50 * coeff, ui_x7);
 492         tmax = 255;
 493         timing->hs_rqst = linear_inter(tmax, tmin, 1, 0, false);
 494
 495         tmin = DIV_ROUND_UP(100 * coeff, ui_x7) - 1;
 496         tmax = 255;
 497         timing->hs_exit = linear_inter(tmax, tmin, 10, 0, false);
 498
 499         tmin = 1;
 500         tmax = 32;
 501         timing->shared_timings.clk_post = linear_inter(tmax, tmin, 80, 0, false);
 502
 503         tmin = min_t(s32, 64, S_DIV_ROUND_UP(262 * coeff, ui_x7) - 1);
 504         tmax = 64;
 505         timing->shared_timings.clk_pre = linear_inter(tmax, tmin, 20, 0, false);
 506
 507         DBG("%d, %d, %d, %d, %d",
 508                 timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 509                 timing->clk_prepare, timing->hs_exit, timing->hs_rqst);
 510
 511         return 0;
 512 }
 513
 514 static int dsi_phy_enable_resource(struct msm_dsi_phy *phy)
 515 {
 516         struct device *dev = &phy->pdev->dev;
 517         int ret;
 518
 519         pm_runtime_get_sync(dev);
 520
 521         ret = clk_prepare_enable(phy->ahb_clk);
 522         if (ret) {
 523                 DRM_DEV_ERROR(dev, "%s: can't enable ahb clk, %d\n", __func__, ret);
 524                 pm_runtime_put_sync(dev);
 525         }
 526
 527         return ret;
 528 }
 529
 530 static void dsi_phy_disable_resource(struct msm_dsi_phy *phy)
 531 {
 532         clk_disable_unprepare(phy->ahb_clk);
 533         pm_runtime_put(&phy->pdev->dev);
 534 }
 535
 536 static const struct of_device_id dsi_phy_dt_match[] = {
 537 #ifdef CONFIG_DRM_MSM_DSI_28NM_PHY
 538         { .compatible = "qcom,dsi-phy-28nm-hpm",
 539           .data = &dsi_phy_28nm_hpm_cfgs },
 540         { .compatible = "qcom,dsi-phy-28nm-hpm-fam-b",
 541           .data = &dsi_phy_28nm_hpm_famb_cfgs },
 542         { .compatible = "qcom,dsi-phy-28nm-lp",
 543           .data = &dsi_phy_28nm_lp_cfgs },
 544         { .compatible = "qcom,dsi-phy-28nm-8226",
 545           .data = &dsi_phy_28nm_8226_cfgs },
 546 #endif
 547 #ifdef CONFIG_DRM_MSM_DSI_20NM_PHY
 548         { .compatible = "qcom,dsi-phy-20nm",
 549           .data = &dsi_phy_20nm_cfgs },
 550 #endif
 551 #ifdef CONFIG_DRM_MSM_DSI_28NM_8960_PHY
 552         { .compatible = "qcom,dsi-phy-28nm-8960",
 553           .data = &dsi_phy_28nm_8960_cfgs },
 554 #endif
 555 #ifdef CONFIG_DRM_MSM_DSI_14NM_PHY
 556         { .compatible = "qcom,dsi-phy-14nm",
 557           .data = &dsi_phy_14nm_cfgs },
 558         { .compatible = "qcom,dsi-phy-14nm-2290",
 559           .data = &dsi_phy_14nm_2290_cfgs },
 560         { .compatible = "qcom,dsi-phy-14nm-660",
 561           .data = &dsi_phy_14nm_660_cfgs },
 562         { .compatible = "qcom,dsi-phy-14nm-8953",
 563           .data = &dsi_phy_14nm_8953_cfgs },
 564         { .compatible = "qcom,sm6125-dsi-phy-14nm",
 565           .data = &dsi_phy_14nm_2290_cfgs },
 566 #endif
 567 #ifdef CONFIG_DRM_MSM_DSI_10NM_PHY
 568         { .compatible = "qcom,dsi-phy-10nm",
 569           .data = &dsi_phy_10nm_cfgs },
 570         { .compatible = "qcom,dsi-phy-10nm-8998",
 571           .data = &dsi_phy_10nm_8998_cfgs },
 572 #endif
 573 #ifdef CONFIG_DRM_MSM_DSI_7NM_PHY
 574         { .compatible = "qcom,dsi-phy-7nm",
 575           .data = &dsi_phy_7nm_cfgs },
 576         { .compatible = "qcom,dsi-phy-7nm-8150",
 577           .data = &dsi_phy_7nm_8150_cfgs },
 578         { .compatible = "qcom,sc7280-dsi-phy-7nm",
 579           .data = &dsi_phy_7nm_7280_cfgs },
 580         { .compatible = "qcom,sm6375-dsi-phy-7nm",
 581           .data = &dsi_phy_7nm_6375_cfgs },
 582         { .compatible = "qcom,sm8350-dsi-phy-5nm",
 583           .data = &dsi_phy_5nm_8350_cfgs },
 584         { .compatible = "qcom,sm8450-dsi-phy-5nm",
 585           .data = &dsi_phy_5nm_8450_cfgs },
 586         { .compatible = "qcom,sm8550-dsi-phy-4nm",
 587           .data = &dsi_phy_4nm_8550_cfgs },
 588 #endif
 589         {}
 590 };
 591
 592 /*
 593  * Currently, we only support one SoC for each PHY type. When we have multiple
 594  * SoCs for the same PHY, we can try to make the index searching a bit more
 595  * clever.
 596  */
 597 static int dsi_phy_get_id(struct msm_dsi_phy *phy)
 598 {
 599         struct platform_device *pdev = phy->pdev;
 600         const struct msm_dsi_phy_cfg *cfg = phy->cfg;
 601         struct resource *res;
 602         int i;
 603
 604         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_phy");
 605         if (!res)
 606                 return -EINVAL;
 607
 608         for (i = 0; i < cfg->num_dsi_phy; i++) {
 609                 if (cfg->io_start[i] == res->start)
 610                         return i;
 611         }
 612
 613         return -EINVAL;
 614 }
 615
 616 static int dsi_phy_driver_probe(struct platform_device *pdev)
 617 {
 618         struct msm_dsi_phy *phy;
 619         struct device *dev = &pdev->dev;
 620         u32 phy_type;
 621         int ret;
 622
 623         phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
 624         if (!phy)
 625                 return -ENOMEM;
 626
 627         phy->provided_clocks = devm_kzalloc(dev,
 628                         struct_size(phy->provided_clocks, hws, NUM_PROVIDED_CLKS),
 629                         GFP_KERNEL);
 630         if (!phy->provided_clocks)
 631                 return -ENOMEM;
 632
 633         phy->provided_clocks->num = NUM_PROVIDED_CLKS;
 634
 635         phy->cfg = of_device_get_match_data(&pdev->dev);
 636         if (!phy->cfg)
 637                 return -ENODEV;
 638
 639         phy->pdev = pdev;
 640
 641         phy->id = dsi_phy_get_id(phy);
 642         if (phy->id < 0)
 643                 return dev_err_probe(dev, phy->id,
 644                                      "Couldn't identify PHY index\n");
 645
 646         phy->regulator_ldo_mode = of_property_read_bool(dev->of_node,
 647                                 "qcom,dsi-phy-regulator-ldo-mode");
 648         if (!of_property_read_u32(dev->of_node, "phy-type", &phy_type))
 649                 phy->cphy_mode = (phy_type == PHY_TYPE_CPHY);
 650
 651         phy->base = msm_ioremap_size(pdev, "dsi_phy", &phy->base_size);
 652         if (IS_ERR(phy->base))
 653                 return dev_err_probe(dev, PTR_ERR(phy->base),
 654                                      "Failed to map phy base\n");
 655
 656         phy->pll_base = msm_ioremap_size(pdev, "dsi_pll", &phy->pll_size);
 657         if (IS_ERR(phy->pll_base))
 658                 return dev_err_probe(dev, PTR_ERR(phy->pll_base),
 659                                      "Failed to map pll base\n");
 660
 661         if (phy->cfg->has_phy_lane) {
 662                 phy->lane_base = msm_ioremap_size(pdev, "dsi_phy_lane", &phy->lane_size);
 663                 if (IS_ERR(phy->lane_base))
 664                         return dev_err_probe(dev, PTR_ERR(phy->lane_base),
 665                                              "Failed to map phy lane base\n");
 666         }
 667
 668         if (phy->cfg->has_phy_regulator) {
 669                 phy->reg_base = msm_ioremap_size(pdev, "dsi_phy_regulator", &phy->reg_size);
 670                 if (IS_ERR(phy->reg_base))
 671                         return dev_err_probe(dev, PTR_ERR(phy->reg_base),
 672                                              "Failed to map phy regulator base\n");
 673         }
 674
 675         if (phy->cfg->ops.parse_dt_properties) {
 676                 ret = phy->cfg->ops.parse_dt_properties(phy);
 677                 if (ret)
 678                         return ret;
 679         }
 680
 681         ret = devm_regulator_bulk_get_const(dev, phy->cfg->num_regulators,
 682                                             phy->cfg->regulator_data,
 683                                             &phy->supplies);
 684         if (ret)
 685                 return ret;
 686
 687         phy->ahb_clk = msm_clk_get(pdev, "iface");
 688         if (IS_ERR(phy->ahb_clk))
 689                 return dev_err_probe(dev, PTR_ERR(phy->ahb_clk),
 690                                      "Unable to get ahb clk\n");
 691
 692         /* PLL init will call into clk_register which requires
 693          * register access, so we need to enable power and ahb clock.
 694          */
 695         ret = dsi_phy_enable_resource(phy);
 696         if (ret)
 697                 return ret;
 698
 699         if (phy->cfg->ops.pll_init) {
 700                 ret = phy->cfg->ops.pll_init(phy);
 701                 if (ret)
 702                         return dev_err_probe(dev, ret,
 703                                              "PLL init failed; need separate clk driver\n");
 704         }
 705
 706         ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
 707                                      phy->provided_clocks);
 708         if (ret)
 709                 return dev_err_probe(dev, ret,
 710                                      "Failed to register clk provider\n");
 711
 712         dsi_phy_disable_resource(phy);
 713
 714         platform_set_drvdata(pdev, phy);
 715
 716         return 0;
 717 }
 718
 719 static struct platform_driver dsi_phy_platform_driver = {
 720         .probe      = dsi_phy_driver_probe,
 721         .driver     = {
 722                 .name   = "msm_dsi_phy",
 723                 .of_match_table = dsi_phy_dt_match,
 724         },
 725 };
 726
 727 void __init msm_dsi_phy_driver_register(void)
 728 {
 729         platform_driver_register(&dsi_phy_platform_driver);
 730 }
 731
 732 void __exit msm_dsi_phy_driver_unregister(void)
 733 {
 734         platform_driver_unregister(&dsi_phy_platform_driver);
 735 }
 736
 737 int msm_dsi_phy_enable(struct msm_dsi_phy *phy,
 738                         struct msm_dsi_phy_clk_request *clk_req,
 739                         struct msm_dsi_phy_shared_timings *shared_timings)
 740 {
 741         struct device *dev;
 742         int ret;
 743
 744         if (!phy || !phy->cfg->ops.enable)
 745                 return -EINVAL;
 746
 747         dev = &phy->pdev->dev;
 748
 749         ret = dsi_phy_enable_resource(phy);
 750         if (ret) {
 751                 DRM_DEV_ERROR(dev, "%s: resource enable failed, %d\n",
 752                         __func__, ret);
 753                 goto res_en_fail;
 754         }
 755
 756         ret = regulator_bulk_enable(phy->cfg->num_regulators, phy->supplies);
 757         if (ret) {
 758                 DRM_DEV_ERROR(dev, "%s: regulator enable failed, %d\n",
 759                         __func__, ret);
 760                 goto reg_en_fail;
 761         }
 762
 763         ret = phy->cfg->ops.enable(phy, clk_req);
 764         if (ret) {
 765                 DRM_DEV_ERROR(dev, "%s: phy enable failed, %d\n", __func__, ret);
 766                 goto phy_en_fail;
 767         }
 768
 769         memcpy(shared_timings, &phy->timing.shared_timings,
 770                sizeof(*shared_timings));
 771
 772         /*
 773          * Resetting DSI PHY silently changes its PLL registers to reset status,
 774          * which will confuse clock driver and result in wrong output rate of
 775          * link clocks. Restore PLL status if its PLL is being used as clock
 776          * source.
 777          */
 778         if (phy->usecase != MSM_DSI_PHY_SLAVE) {
 779                 ret = msm_dsi_phy_pll_restore_state(phy);
 780                 if (ret) {
 781                         DRM_DEV_ERROR(dev, "%s: failed to restore phy state, %d\n",
 782                                 __func__, ret);
 783                         goto pll_restor_fail;
 784                 }
 785         }
 786
 787         return 0;
 788
 789 pll_restor_fail:
 790         if (phy->cfg->ops.disable)
 791                 phy->cfg->ops.disable(phy);
 792 phy_en_fail:
 793         regulator_bulk_disable(phy->cfg->num_regulators, phy->supplies);
 794 reg_en_fail:
 795         dsi_phy_disable_resource(phy);
 796 res_en_fail:
 797         return ret;
 798 }
 799
 800 void msm_dsi_phy_disable(struct msm_dsi_phy *phy)
 801 {
 802         if (!phy || !phy->cfg->ops.disable)
 803                 return;
 804
 805         phy->cfg->ops.disable(phy);
 806
 807         regulator_bulk_disable(phy->cfg->num_regulators, phy->supplies);
 808         dsi_phy_disable_resource(phy);
 809 }
 810
 811 void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
 812                              enum msm_dsi_phy_usecase uc)
 813 {
 814         if (phy)
 815                 phy->usecase = uc;
 816 }
 817
 818 /* Returns true if we have to clear DSI_LANE_CTRL.HS_REQ_SEL_PHY */
 819 bool msm_dsi_phy_set_continuous_clock(struct msm_dsi_phy *phy, bool enable)
 820 {
 821         if (!phy || !phy->cfg->ops.set_continuous_clock)
 822                 return false;
 823
 824         return phy->cfg->ops.set_continuous_clock(phy, enable);
 825 }
 826
 827 void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy)
 828 {
 829         if (phy->cfg->ops.save_pll_state) {
 830                 phy->cfg->ops.save_pll_state(phy);
 831                 phy->state_saved = true;
 832         }
 833 }
 834
 835 int msm_dsi_phy_pll_restore_state(struct msm_dsi_phy *phy)
 836 {
 837         int ret;
 838
 839         if (phy->cfg->ops.restore_pll_state && phy->state_saved) {
 840                 ret = phy->cfg->ops.restore_pll_state(phy);
 841                 if (ret)
 842                         return ret;
 843
 844                 phy->state_saved = false;
 845         }
 846
 847         return 0;
 848 }
 849
 850 void msm_dsi_phy_snapshot(struct msm_disp_state *disp_state, struct msm_dsi_phy *phy)
 851 {
 852         msm_disp_snapshot_add_block(disp_state,
 853                         phy->base_size, phy->base,
 854                         "dsi%d_phy", phy->id);
 855
 856         /* Do not try accessing PLL registers if it is switched off */
 857         if (phy->pll_on)
 858                 msm_disp_snapshot_add_block(disp_state,
 859                         phy->pll_size, phy->pll_base,
 860                         "dsi%d_pll", phy->id);
 861
 862         if (phy->lane_base)
 863                 msm_disp_snapshot_add_block(disp_state,
 864                         phy->lane_size, phy->lane_base,
 865                         "dsi%d_lane", phy->id);
 866
 867         if (phy->reg_base)
 868                 msm_disp_snapshot_add_block(disp_state,
 869                         phy->reg_size, phy->reg_base,
 870                         "dsi%d_reg", phy->id);
 871 }