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

   1 /*
   2  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/platform_device.h>
  15
  16 #include "dsi_phy.h"
  17
  18 #define S_DIV_ROUND_UP(n, d)    \
  19         (((n) >= 0) ? (((n) + (d) - 1) / (d)) : (((n) - (d) + 1) / (d)))
  20
  21 static inline s32 linear_inter(s32 tmax, s32 tmin, s32 percent,
  22                                 s32 min_result, bool even)
  23 {
  24         s32 v;
  25
  26         v = (tmax - tmin) * percent;
  27         v = S_DIV_ROUND_UP(v, 100) + tmin;
  28         if (even && (v & 0x1))
  29                 return max_t(s32, min_result, v - 1);
  30         else
  31                 return max_t(s32, min_result, v);
  32 }
  33
  34 static void dsi_dphy_timing_calc_clk_zero(struct msm_dsi_dphy_timing *timing,
  35                                         s32 ui, s32 coeff, s32 pcnt)
  36 {
  37         s32 tmax, tmin, clk_z;
  38         s32 temp;
  39
  40         /* reset */
  41         temp = 300 * coeff - ((timing->clk_prepare >> 1) + 1) * 2 * ui;
  42         tmin = S_DIV_ROUND_UP(temp, ui) - 2;
  43         if (tmin > 255) {
  44                 tmax = 511;
  45                 clk_z = linear_inter(2 * tmin, tmin, pcnt, 0, true);
  46         } else {
  47                 tmax = 255;
  48                 clk_z = linear_inter(tmax, tmin, pcnt, 0, true);
  49         }
  50
  51         /* adjust */
  52         temp = (timing->hs_rqst + timing->clk_prepare + clk_z) & 0x7;
  53         timing->clk_zero = clk_z + 8 - temp;
  54 }
  55
  56 int msm_dsi_dphy_timing_calc(struct msm_dsi_dphy_timing *timing,
  57                              struct msm_dsi_phy_clk_request *clk_req)
  58 {
  59         const unsigned long bit_rate = clk_req->bitclk_rate;
  60         const unsigned long esc_rate = clk_req->escclk_rate;
  61         s32 ui, lpx;
  62         s32 tmax, tmin;
  63         s32 pcnt0 = 10;
  64         s32 pcnt1 = (bit_rate > 1200000000) ? 15 : 10;
  65         s32 pcnt2 = 10;
  66         s32 pcnt3 = (bit_rate > 180000000) ? 10 : 40;
  67         s32 coeff = 1000; /* Precision, should avoid overflow */
  68         s32 temp;
  69
  70         if (!bit_rate || !esc_rate)
  71                 return -EINVAL;
  72
  73         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
  74         lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000);
  75
  76         tmax = S_DIV_ROUND_UP(95 * coeff, ui) - 2;
  77         tmin = S_DIV_ROUND_UP(38 * coeff, ui) - 2;
  78         timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, true);
  79
  80         temp = lpx / ui;
  81         if (temp & 0x1)
  82                 timing->hs_rqst = temp;
  83         else
  84                 timing->hs_rqst = max_t(s32, 0, temp - 2);
  85
  86         /* Calculate clk_zero after clk_prepare and hs_rqst */
  87         dsi_dphy_timing_calc_clk_zero(timing, ui, coeff, pcnt2);
  88
  89         temp = 105 * coeff + 12 * ui - 20 * coeff;
  90         tmax = S_DIV_ROUND_UP(temp, ui) - 2;
  91         tmin = S_DIV_ROUND_UP(60 * coeff, ui) - 2;
  92         timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, true);
  93
  94         temp = 85 * coeff + 6 * ui;
  95         tmax = S_DIV_ROUND_UP(temp, ui) - 2;
  96         temp = 40 * coeff + 4 * ui;
  97         tmin = S_DIV_ROUND_UP(temp, ui) - 2;
  98         timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, true);
  99
 100         tmax = 255;
 101         temp = ((timing->hs_prepare >> 1) + 1) * 2 * ui + 2 * ui;
 102         temp = 145 * coeff + 10 * ui - temp;
 103         tmin = S_DIV_ROUND_UP(temp, ui) - 2;
 104         timing->hs_zero = linear_inter(tmax, tmin, pcnt2, 24, true);
 105
 106         temp = 105 * coeff + 12 * ui - 20 * coeff;
 107         tmax = S_DIV_ROUND_UP(temp, ui) - 2;
 108         temp = 60 * coeff + 4 * ui;
 109         tmin = DIV_ROUND_UP(temp, ui) - 2;
 110         timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, true);
 111
 112         tmax = 255;
 113         tmin = S_DIV_ROUND_UP(100 * coeff, ui) - 2;
 114         timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, true);
 115
 116         tmax = 63;
 117         temp = ((timing->hs_exit >> 1) + 1) * 2 * ui;
 118         temp = 60 * coeff + 52 * ui - 24 * ui - temp;
 119         tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1;
 120         timing->shared_timings.clk_post = linear_inter(tmax, tmin, pcnt2, 0,
 121                                                        false);
 122         tmax = 63;
 123         temp = ((timing->clk_prepare >> 1) + 1) * 2 * ui;
 124         temp += ((timing->clk_zero >> 1) + 1) * 2 * ui;
 125         temp += 8 * ui + lpx;
 126         tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1;
 127         if (tmin > tmax) {
 128                 temp = linear_inter(2 * tmax, tmin, pcnt2, 0, false);
 129                 timing->shared_timings.clk_pre = temp >> 1;
 130                 timing->shared_timings.clk_pre_inc_by_2 = true;
 131         } else {
 132                 timing->shared_timings.clk_pre =
 133                                 linear_inter(tmax, tmin, pcnt2, 0, false);
 134                 timing->shared_timings.clk_pre_inc_by_2 = false;
 135         }
 136
 137         timing->ta_go = 3;
 138         timing->ta_sure = 0;
 139         timing->ta_get = 4;
 140
 141         DBG("PHY timings: %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
 142                 timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 143                 timing->shared_timings.clk_pre_inc_by_2, timing->clk_zero,
 144                 timing->clk_trail, timing->clk_prepare, timing->hs_exit,
 145                 timing->hs_zero, timing->hs_prepare, timing->hs_trail,
 146                 timing->hs_rqst);
 147
 148         return 0;
 149 }
 150
 151 int msm_dsi_dphy_timing_calc_v2(struct msm_dsi_dphy_timing *timing,
 152                                 struct msm_dsi_phy_clk_request *clk_req)
 153 {
 154         const unsigned long bit_rate = clk_req->bitclk_rate;
 155         const unsigned long esc_rate = clk_req->escclk_rate;
 156         s32 ui, ui_x8, lpx;
 157         s32 tmax, tmin;
 158         s32 pcnt0 = 50;
 159         s32 pcnt1 = 50;
 160         s32 pcnt2 = 10;
 161         s32 pcnt3 = 30;
 162         s32 pcnt4 = 10;
 163         s32 pcnt5 = 2;
 164         s32 coeff = 1000; /* Precision, should avoid overflow */
 165         s32 hb_en, hb_en_ckln, pd_ckln, pd;
 166         s32 val, val_ckln;
 167         s32 temp;
 168
 169         if (!bit_rate || !esc_rate)
 170                 return -EINVAL;
 171
 172         timing->hs_halfbyte_en = 0;
 173         hb_en = 0;
 174         timing->hs_halfbyte_en_ckln = 0;
 175         hb_en_ckln = 0;
 176         timing->hs_prep_dly_ckln = (bit_rate > 100000000) ? 0 : 3;
 177         pd_ckln = timing->hs_prep_dly_ckln;
 178         timing->hs_prep_dly = (bit_rate > 120000000) ? 0 : 1;
 179         pd = timing->hs_prep_dly;
 180
 181         val = (hb_en << 2) + (pd << 1);
 182         val_ckln = (hb_en_ckln << 2) + (pd_ckln << 1);
 183
 184         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
 185         ui_x8 = ui << 3;
 186         lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000);
 187
 188         temp = S_DIV_ROUND_UP(38 * coeff - val_ckln * ui, ui_x8);
 189         tmin = max_t(s32, temp, 0);
 190         temp = (95 * coeff - val_ckln * ui) / ui_x8;
 191         tmax = max_t(s32, temp, 0);
 192         timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, false);
 193
 194         temp = 300 * coeff - ((timing->clk_prepare << 3) + val_ckln) * ui;
 195         tmin = S_DIV_ROUND_UP(temp - 11 * ui, ui_x8) - 3;
 196         tmax = (tmin > 255) ? 511 : 255;
 197         timing->clk_zero = linear_inter(tmax, tmin, pcnt5, 0, false);
 198
 199         tmin = DIV_ROUND_UP(60 * coeff + 3 * ui, ui_x8);
 200         temp = 105 * coeff + 12 * ui - 20 * coeff;
 201         tmax = (temp + 3 * ui) / ui_x8;
 202         timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 203
 204         temp = S_DIV_ROUND_UP(40 * coeff + 4 * ui - val * ui, ui_x8);
 205         tmin = max_t(s32, temp, 0);
 206         temp = (85 * coeff + 6 * ui - val * ui) / ui_x8;
 207         tmax = max_t(s32, temp, 0);
 208         timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, false);
 209
 210         temp = 145 * coeff + 10 * ui - ((timing->hs_prepare << 3) + val) * ui;
 211         tmin = S_DIV_ROUND_UP(temp - 11 * ui, ui_x8) - 3;
 212         tmax = 255;
 213         timing->hs_zero = linear_inter(tmax, tmin, pcnt4, 0, false);
 214
 215         tmin = DIV_ROUND_UP(60 * coeff + 4 * ui + 3 * ui, ui_x8);
 216         temp = 105 * coeff + 12 * ui - 20 * coeff;
 217         tmax = (temp + 3 * ui) / ui_x8;
 218         timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 219
 220         temp = 50 * coeff + ((hb_en << 2) - 8) * ui;
 221         timing->hs_rqst = S_DIV_ROUND_UP(temp, ui_x8);
 222
 223         tmin = DIV_ROUND_UP(100 * coeff, ui_x8) - 1;
 224         tmax = 255;
 225         timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, false);
 226
 227         temp = 50 * coeff + ((hb_en_ckln << 2) - 8) * ui;
 228         timing->hs_rqst_ckln = S_DIV_ROUND_UP(temp, ui_x8);
 229
 230         temp = 60 * coeff + 52 * ui - 43 * ui;
 231         tmin = DIV_ROUND_UP(temp, ui_x8) - 1;
 232         tmax = 63;
 233         timing->shared_timings.clk_post =
 234                                 linear_inter(tmax, tmin, pcnt2, 0, false);
 235
 236         temp = 8 * ui + ((timing->clk_prepare << 3) + val_ckln) * ui;
 237         temp += (((timing->clk_zero + 3) << 3) + 11 - (pd_ckln << 1)) * ui;
 238         temp += hb_en_ckln ? (((timing->hs_rqst_ckln << 3) + 4) * ui) :
 239                                 (((timing->hs_rqst_ckln << 3) + 8) * ui);
 240         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 241         tmax = 63;
 242         if (tmin > tmax) {
 243                 temp = linear_inter(tmax << 1, tmin, pcnt2, 0, false);
 244                 timing->shared_timings.clk_pre = temp >> 1;
 245                 timing->shared_timings.clk_pre_inc_by_2 = 1;
 246         } else {
 247                 timing->shared_timings.clk_pre =
 248                                 linear_inter(tmax, tmin, pcnt2, 0, false);
 249                 timing->shared_timings.clk_pre_inc_by_2 = 0;
 250         }
 251
 252         timing->ta_go = 3;
 253         timing->ta_sure = 0;
 254         timing->ta_get = 4;
 255
 256         DBG("%d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
 257             timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 258             timing->shared_timings.clk_pre_inc_by_2, timing->clk_zero,
 259             timing->clk_trail, timing->clk_prepare, timing->hs_exit,
 260             timing->hs_zero, timing->hs_prepare, timing->hs_trail,
 261             timing->hs_rqst, timing->hs_rqst_ckln, timing->hs_halfbyte_en,
 262             timing->hs_halfbyte_en_ckln, timing->hs_prep_dly,
 263             timing->hs_prep_dly_ckln);
 264
 265         return 0;
 266 }
 267
 268 int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
 269         struct msm_dsi_phy_clk_request *clk_req)
 270 {
 271         const unsigned long bit_rate = clk_req->bitclk_rate;
 272         const unsigned long esc_rate = clk_req->escclk_rate;
 273         s32 ui, ui_x8, lpx;
 274         s32 tmax, tmin;
 275         s32 pcnt0 = 50;
 276         s32 pcnt1 = 50;
 277         s32 pcnt2 = 10;
 278         s32 pcnt3 = 30;
 279         s32 pcnt4 = 10;
 280         s32 pcnt5 = 2;
 281         s32 coeff = 1000; /* Precision, should avoid overflow */
 282         s32 hb_en, hb_en_ckln;
 283         s32 temp;
 284
 285         if (!bit_rate || !esc_rate)
 286                 return -EINVAL;
 287
 288         timing->hs_halfbyte_en = 0;
 289         hb_en = 0;
 290         timing->hs_halfbyte_en_ckln = 0;
 291         hb_en_ckln = 0;
 292
 293         ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
 294         ui_x8 = ui << 3;
 295         lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000);
 296
 297         temp = S_DIV_ROUND_UP(38 * coeff, ui_x8);
 298         tmin = max_t(s32, temp, 0);
 299         temp = (95 * coeff) / ui_x8;
 300         tmax = max_t(s32, temp, 0);
 301         timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, false);
 302
 303         temp = 300 * coeff - (timing->clk_prepare << 3) * ui;
 304         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 305         tmax = (tmin > 255) ? 511 : 255;
 306         timing->clk_zero = linear_inter(tmax, tmin, pcnt5, 0, false);
 307
 308         tmin = DIV_ROUND_UP(60 * coeff + 3 * ui, ui_x8);
 309         temp = 105 * coeff + 12 * ui - 20 * coeff;
 310         tmax = (temp + 3 * ui) / ui_x8;
 311         timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 312
 313         temp = S_DIV_ROUND_UP(40 * coeff + 4 * ui, ui_x8);
 314         tmin = max_t(s32, temp, 0);
 315         temp = (85 * coeff + 6 * ui) / ui_x8;
 316         tmax = max_t(s32, temp, 0);
 317         timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, false);
 318
 319         temp = 145 * coeff + 10 * ui - (timing->hs_prepare << 3) * ui;
 320         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 321         tmax = 255;
 322         timing->hs_zero = linear_inter(tmax, tmin, pcnt4, 0, false);
 323
 324         tmin = DIV_ROUND_UP(60 * coeff + 4 * ui, ui_x8) - 1;
 325         temp = 105 * coeff + 12 * ui - 20 * coeff;
 326         tmax = (temp / ui_x8) - 1;
 327         timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, false);
 328
 329         temp = 50 * coeff + ((hb_en << 2) - 8) * ui;
 330         timing->hs_rqst = S_DIV_ROUND_UP(temp, ui_x8);
 331
 332         tmin = DIV_ROUND_UP(100 * coeff, ui_x8) - 1;
 333         tmax = 255;
 334         timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, false);
 335
 336         temp = 50 * coeff + ((hb_en_ckln << 2) - 8) * ui;
 337         timing->hs_rqst_ckln = S_DIV_ROUND_UP(temp, ui_x8);
 338
 339         temp = 60 * coeff + 52 * ui - 43 * ui;
 340         tmin = DIV_ROUND_UP(temp, ui_x8) - 1;
 341         tmax = 63;
 342         timing->shared_timings.clk_post =
 343                 linear_inter(tmax, tmin, pcnt2, 0, false);
 344
 345         temp = 8 * ui + (timing->clk_prepare << 3) * ui;
 346         temp += (((timing->clk_zero + 3) << 3) + 11) * ui;
 347         temp += hb_en_ckln ? (((timing->hs_rqst_ckln << 3) + 4) * ui) :
 348                 (((timing->hs_rqst_ckln << 3) + 8) * ui);
 349         tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
 350         tmax = 63;
 351         if (tmin > tmax) {
 352                 temp = linear_inter(tmax << 1, tmin, pcnt2, 0, false);
 353                 timing->shared_timings.clk_pre = temp >> 1;
 354                 timing->shared_timings.clk_pre_inc_by_2 = 1;
 355         } else {
 356                 timing->shared_timings.clk_pre =
 357                         linear_inter(tmax, tmin, pcnt2, 0, false);
 358                         timing->shared_timings.clk_pre_inc_by_2 = 0;
 359         }
 360
 361         timing->ta_go = 3;
 362         timing->ta_sure = 0;
 363         timing->ta_get = 4;
 364
 365         DBG("%d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
 366                 timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
 367                 timing->shared_timings.clk_pre_inc_by_2, timing->clk_zero,
 368                 timing->clk_trail, timing->clk_prepare, timing->hs_exit,
 369                 timing->hs_zero, timing->hs_prepare, timing->hs_trail,
 370                 timing->hs_rqst, timing->hs_rqst_ckln, timing->hs_halfbyte_en,
 371                 timing->hs_halfbyte_en_ckln, timing->hs_prep_dly,
 372                 timing->hs_prep_dly_ckln);
 373
 374         return 0;
 375 }
 376
 377 void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
 378                                 u32 bit_mask)
 379 {
 380         int phy_id = phy->id;
 381         u32 val;
 382
 383         if ((phy_id >= DSI_MAX) || (pll_id >= DSI_MAX))
 384                 return;
 385
 386         val = dsi_phy_read(phy->base + reg);
 387
 388         if (phy->cfg->src_pll_truthtable[phy_id][pll_id])
 389                 dsi_phy_write(phy->base + reg, val | bit_mask);
 390         else
 391                 dsi_phy_write(phy->base + reg, val & (~bit_mask));
 392 }
 393
 394 static int dsi_phy_regulator_init(struct msm_dsi_phy *phy)
 395 {
 396         struct regulator_bulk_data *s = phy->supplies;
 397         const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs;
 398         struct device *dev = &phy->pdev->dev;
 399         int num = phy->cfg->reg_cfg.num;
 400         int i, ret;
 401
 402         for (i = 0; i < num; i++)
 403                 s[i].supply = regs[i].name;
 404
 405         ret = devm_regulator_bulk_get(dev, num, s);
 406         if (ret < 0) {
 407                 dev_err(dev, "%s: failed to init regulator, ret=%d\n",
 408                                                 __func__, ret);
 409                 return ret;
 410         }
 411
 412         return 0;
 413 }
 414
 415 static void dsi_phy_regulator_disable(struct msm_dsi_phy *phy)
 416 {
 417         struct regulator_bulk_data *s = phy->supplies;
 418         const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs;
 419         int num = phy->cfg->reg_cfg.num;
 420         int i;
 421
 422         DBG("");
 423         for (i = num - 1; i >= 0; i--)
 424                 if (regs[i].disable_load >= 0)
 425                         regulator_set_load(s[i].consumer, regs[i].disable_load);
 426
 427         regulator_bulk_disable(num, s);
 428 }
 429
 430 static int dsi_phy_regulator_enable(struct msm_dsi_phy *phy)
 431 {
 432         struct regulator_bulk_data *s = phy->supplies;
 433         const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs;
 434         struct device *dev = &phy->pdev->dev;
 435         int num = phy->cfg->reg_cfg.num;
 436         int ret, i;
 437
 438         DBG("");
 439         for (i = 0; i < num; i++) {
 440                 if (regs[i].enable_load >= 0) {
 441                         ret = regulator_set_load(s[i].consumer,
 442                                                         regs[i].enable_load);
 443                         if (ret < 0) {
 444                                 dev_err(dev,
 445                                         "regulator %d set op mode failed, %d\n",
 446                                         i, ret);
 447                                 goto fail;
 448                         }
 449                 }
 450         }
 451
 452         ret = regulator_bulk_enable(num, s);
 453         if (ret < 0) {
 454                 dev_err(dev, "regulator enable failed, %d\n", ret);
 455                 goto fail;
 456         }
 457
 458         return 0;
 459
 460 fail:
 461         for (i--; i >= 0; i--)
 462                 regulator_set_load(s[i].consumer, regs[i].disable_load);
 463         return ret;
 464 }
 465
 466 static int dsi_phy_enable_resource(struct msm_dsi_phy *phy)
 467 {
 468         struct device *dev = &phy->pdev->dev;
 469         int ret;
 470
 471         pm_runtime_get_sync(dev);
 472
 473         ret = clk_prepare_enable(phy->ahb_clk);
 474         if (ret) {
 475                 dev_err(dev, "%s: can't enable ahb clk, %d\n", __func__, ret);
 476                 pm_runtime_put_sync(dev);
 477         }
 478
 479         return ret;
 480 }
 481
 482 static void dsi_phy_disable_resource(struct msm_dsi_phy *phy)
 483 {
 484         clk_disable_unprepare(phy->ahb_clk);
 485         pm_runtime_put_autosuspend(&phy->pdev->dev);
 486 }
 487
 488 static const struct of_device_id dsi_phy_dt_match[] = {
 489 #ifdef CONFIG_DRM_MSM_DSI_28NM_PHY
 490         { .compatible = "qcom,dsi-phy-28nm-hpm",
 491           .data = &dsi_phy_28nm_hpm_cfgs },
 492         { .compatible = "qcom,dsi-phy-28nm-lp",
 493           .data = &dsi_phy_28nm_lp_cfgs },
 494 #endif
 495 #ifdef CONFIG_DRM_MSM_DSI_20NM_PHY
 496         { .compatible = "qcom,dsi-phy-20nm",
 497           .data = &dsi_phy_20nm_cfgs },
 498 #endif
 499 #ifdef CONFIG_DRM_MSM_DSI_28NM_8960_PHY
 500         { .compatible = "qcom,dsi-phy-28nm-8960",
 501           .data = &dsi_phy_28nm_8960_cfgs },
 502 #endif
 503 #ifdef CONFIG_DRM_MSM_DSI_14NM_PHY
 504         { .compatible = "qcom,dsi-phy-14nm",
 505           .data = &dsi_phy_14nm_cfgs },
 506 #endif
 507 #ifdef CONFIG_DRM_MSM_DSI_10NM_PHY
 508         { .compatible = "qcom,dsi-phy-10nm",
 509           .data = &dsi_phy_10nm_cfgs },
 510 #endif
 511         {}
 512 };
 513
 514 /*
 515  * Currently, we only support one SoC for each PHY type. When we have multiple
 516  * SoCs for the same PHY, we can try to make the index searching a bit more
 517  * clever.
 518  */
 519 static int dsi_phy_get_id(struct msm_dsi_phy *phy)
 520 {
 521         struct platform_device *pdev = phy->pdev;
 522         const struct msm_dsi_phy_cfg *cfg = phy->cfg;
 523         struct resource *res;
 524         int i;
 525
 526         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi_phy");
 527         if (!res)
 528                 return -EINVAL;
 529
 530         for (i = 0; i < cfg->num_dsi_phy; i++) {
 531                 if (cfg->io_start[i] == res->start)
 532                         return i;
 533         }
 534
 535         return -EINVAL;
 536 }
 537
 538 int msm_dsi_phy_init_common(struct msm_dsi_phy *phy)
 539 {
 540         struct platform_device *pdev = phy->pdev;
 541         int ret = 0;
 542
 543         phy->reg_base = msm_ioremap(pdev, "dsi_phy_regulator",
 544                                 "DSI_PHY_REG");
 545         if (IS_ERR(phy->reg_base)) {
 546                 dev_err(&pdev->dev, "%s: failed to map phy regulator base\n",
 547                         __func__);
 548                 ret = -ENOMEM;
 549                 goto fail;
 550         }
 551
 552 fail:
 553         return ret;
 554 }
 555
 556 static int dsi_phy_driver_probe(struct platform_device *pdev)
 557 {
 558         struct msm_dsi_phy *phy;
 559         struct device *dev = &pdev->dev;
 560         const struct of_device_id *match;
 561         int ret;
 562
 563         phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
 564         if (!phy)
 565                 return -ENOMEM;
 566
 567         match = of_match_node(dsi_phy_dt_match, dev->of_node);
 568         if (!match)
 569                 return -ENODEV;
 570
 571         phy->cfg = match->data;
 572         phy->pdev = pdev;
 573
 574         phy->id = dsi_phy_get_id(phy);
 575         if (phy->id < 0) {
 576                 ret = phy->id;
 577                 dev_err(dev, "%s: couldn't identify PHY index, %d\n",
 578                         __func__, ret);
 579                 goto fail;
 580         }
 581
 582         phy->regulator_ldo_mode = of_property_read_bool(dev->of_node,
 583                                 "qcom,dsi-phy-regulator-ldo-mode");
 584
 585         phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
 586         if (IS_ERR(phy->base)) {
 587                 dev_err(dev, "%s: failed to map phy base\n", __func__);
 588                 ret = -ENOMEM;
 589                 goto fail;
 590         }
 591
 592         ret = dsi_phy_regulator_init(phy);
 593         if (ret) {
 594                 dev_err(dev, "%s: failed to init regulator\n", __func__);
 595                 goto fail;
 596         }
 597
 598         phy->ahb_clk = msm_clk_get(pdev, "iface");
 599         if (IS_ERR(phy->ahb_clk)) {
 600                 dev_err(dev, "%s: Unable to get ahb clk\n", __func__);
 601                 ret = PTR_ERR(phy->ahb_clk);
 602                 goto fail;
 603         }
 604
 605         if (phy->cfg->ops.init) {
 606                 ret = phy->cfg->ops.init(phy);
 607                 if (ret)
 608                         goto fail;
 609         }
 610
 611         /* PLL init will call into clk_register which requires
 612          * register access, so we need to enable power and ahb clock.
 613          */
 614         ret = dsi_phy_enable_resource(phy);
 615         if (ret)
 616                 goto fail;
 617
 618         phy->pll = msm_dsi_pll_init(pdev, phy->cfg->type, phy->id);
 619         if (IS_ERR_OR_NULL(phy->pll))
 620                 dev_info(dev,
 621                         "%s: pll init failed: %ld, need separate pll clk driver\n",
 622                         __func__, PTR_ERR(phy->pll));
 623
 624         dsi_phy_disable_resource(phy);
 625
 626         platform_set_drvdata(pdev, phy);
 627
 628         return 0;
 629
 630 fail:
 631         return ret;
 632 }
 633
 634 static int dsi_phy_driver_remove(struct platform_device *pdev)
 635 {
 636         struct msm_dsi_phy *phy = platform_get_drvdata(pdev);
 637
 638         if (phy && phy->pll) {
 639                 msm_dsi_pll_destroy(phy->pll);
 640                 phy->pll = NULL;
 641         }
 642
 643         platform_set_drvdata(pdev, NULL);
 644
 645         return 0;
 646 }
 647
 648 static struct platform_driver dsi_phy_platform_driver = {
 649         .probe      = dsi_phy_driver_probe,
 650         .remove     = dsi_phy_driver_remove,
 651         .driver     = {
 652                 .name   = "msm_dsi_phy",
 653                 .of_match_table = dsi_phy_dt_match,
 654         },
 655 };
 656
 657 void __init msm_dsi_phy_driver_register(void)
 658 {
 659         platform_driver_register(&dsi_phy_platform_driver);
 660 }
 661
 662 void __exit msm_dsi_phy_driver_unregister(void)
 663 {
 664         platform_driver_unregister(&dsi_phy_platform_driver);
 665 }
 666
 667 int msm_dsi_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 668                         struct msm_dsi_phy_clk_request *clk_req)
 669 {
 670         struct device *dev = &phy->pdev->dev;
 671         int ret;
 672
 673         if (!phy || !phy->cfg->ops.enable)
 674                 return -EINVAL;
 675
 676         ret = dsi_phy_enable_resource(phy);
 677         if (ret) {
 678                 dev_err(dev, "%s: resource enable failed, %d\n",
 679                         __func__, ret);
 680                 goto res_en_fail;
 681         }
 682
 683         ret = dsi_phy_regulator_enable(phy);
 684         if (ret) {
 685                 dev_err(dev, "%s: regulator enable failed, %d\n",
 686                         __func__, ret);
 687                 goto reg_en_fail;
 688         }
 689
 690         ret = phy->cfg->ops.enable(phy, src_pll_id, clk_req);
 691         if (ret) {
 692                 dev_err(dev, "%s: phy enable failed, %d\n", __func__, ret);
 693                 goto phy_en_fail;
 694         }
 695
 696         /*
 697          * Resetting DSI PHY silently changes its PLL registers to reset status,
 698          * which will confuse clock driver and result in wrong output rate of
 699          * link clocks. Restore PLL status if its PLL is being used as clock
 700          * source.
 701          */
 702         if (phy->usecase != MSM_DSI_PHY_SLAVE) {
 703                 ret = msm_dsi_pll_restore_state(phy->pll);
 704                 if (ret) {
 705                         dev_err(dev, "%s: failed to restore pll state, %d\n",
 706                                 __func__, ret);
 707                         goto pll_restor_fail;
 708                 }
 709         }
 710
 711         return 0;
 712
 713 pll_restor_fail:
 714         if (phy->cfg->ops.disable)
 715                 phy->cfg->ops.disable(phy);
 716 phy_en_fail:
 717         dsi_phy_regulator_disable(phy);
 718 reg_en_fail:
 719         dsi_phy_disable_resource(phy);
 720 res_en_fail:
 721         return ret;
 722 }
 723
 724 void msm_dsi_phy_disable(struct msm_dsi_phy *phy)
 725 {
 726         if (!phy || !phy->cfg->ops.disable)
 727                 return;
 728
 729         /* Save PLL status if it is a clock source */
 730         if (phy->usecase != MSM_DSI_PHY_SLAVE)
 731                 msm_dsi_pll_save_state(phy->pll);
 732
 733         phy->cfg->ops.disable(phy);
 734
 735         dsi_phy_regulator_disable(phy);
 736         dsi_phy_disable_resource(phy);
 737 }
 738
 739 void msm_dsi_phy_get_shared_timings(struct msm_dsi_phy *phy,
 740                         struct msm_dsi_phy_shared_timings *shared_timings)
 741 {
 742         memcpy(shared_timings, &phy->timing.shared_timings,
 743                sizeof(*shared_timings));
 744 }
 745
 746 struct msm_dsi_pll *msm_dsi_phy_get_pll(struct msm_dsi_phy *phy)
 747 {
 748         if (!phy)
 749                 return NULL;
 750
 751         return phy->pll;
 752 }
 753
 754 void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
 755                              enum msm_dsi_phy_usecase uc)
 756 {
 757         if (phy)
 758                 phy->usecase = uc;
 759 }