Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 1 | /* |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 2 | * Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 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 | #define pr_fmt(fmt) "msm-dsi-phy:[%s] " fmt, __func__ |
| 15 | |
| 16 | #include <linux/of_device.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/regulator/consumer.h> |
| 19 | #include <linux/clk.h> |
| 20 | #include <linux/msm-bus.h> |
| 21 | #include <linux/list.h> |
| 22 | |
| 23 | #include "msm_drv.h" |
| 24 | #include "msm_kms.h" |
| 25 | #include "msm_gpu.h" |
| 26 | #include "dsi_phy.h" |
| 27 | #include "dsi_phy_hw.h" |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 28 | #include "dsi_clk.h" |
| 29 | #include "dsi_pwr.h" |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 30 | #include "dsi_catalog.h" |
| 31 | |
| 32 | #define DSI_PHY_DEFAULT_LABEL "MDSS PHY CTRL" |
| 33 | |
| 34 | struct dsi_phy_list_item { |
| 35 | struct msm_dsi_phy *phy; |
| 36 | struct list_head list; |
| 37 | }; |
| 38 | |
| 39 | static LIST_HEAD(dsi_phy_list); |
| 40 | static DEFINE_MUTEX(dsi_phy_list_lock); |
| 41 | |
| 42 | static const struct dsi_ver_spec_info dsi_phy_v1_0 = { |
| 43 | .version = DSI_PHY_VERSION_1_0, |
| 44 | .lane_cfg_count = 4, |
| 45 | .strength_cfg_count = 2, |
| 46 | .regulator_cfg_count = 1, |
| 47 | .timing_cfg_count = 8, |
| 48 | }; |
| 49 | static const struct dsi_ver_spec_info dsi_phy_v2_0 = { |
| 50 | .version = DSI_PHY_VERSION_2_0, |
| 51 | .lane_cfg_count = 4, |
| 52 | .strength_cfg_count = 2, |
| 53 | .regulator_cfg_count = 1, |
| 54 | .timing_cfg_count = 8, |
| 55 | }; |
| 56 | static const struct dsi_ver_spec_info dsi_phy_v3_0 = { |
| 57 | .version = DSI_PHY_VERSION_3_0, |
| 58 | .lane_cfg_count = 4, |
| 59 | .strength_cfg_count = 2, |
| 60 | .regulator_cfg_count = 1, |
| 61 | .timing_cfg_count = 8, |
| 62 | }; |
| 63 | static const struct dsi_ver_spec_info dsi_phy_v4_0 = { |
| 64 | .version = DSI_PHY_VERSION_4_0, |
| 65 | .lane_cfg_count = 4, |
| 66 | .strength_cfg_count = 2, |
| 67 | .regulator_cfg_count = 1, |
| 68 | .timing_cfg_count = 8, |
| 69 | }; |
| 70 | |
| 71 | static const struct of_device_id msm_dsi_phy_of_match[] = { |
| 72 | { .compatible = "qcom,dsi-phy-v1.0", |
| 73 | .data = &dsi_phy_v1_0,}, |
| 74 | { .compatible = "qcom,dsi-phy-v2.0", |
| 75 | .data = &dsi_phy_v2_0,}, |
| 76 | { .compatible = "qcom,dsi-phy-v3.0", |
| 77 | .data = &dsi_phy_v3_0,}, |
| 78 | { .compatible = "qcom,dsi-phy-v4.0", |
| 79 | .data = &dsi_phy_v4_0,}, |
| 80 | {} |
| 81 | }; |
| 82 | |
| 83 | static int dsi_phy_regmap_init(struct platform_device *pdev, |
| 84 | struct msm_dsi_phy *phy) |
| 85 | { |
| 86 | int rc = 0; |
| 87 | void __iomem *ptr; |
| 88 | |
| 89 | ptr = msm_ioremap(pdev, "dsi_phy", phy->name); |
| 90 | if (IS_ERR(ptr)) { |
| 91 | rc = PTR_ERR(ptr); |
| 92 | return rc; |
| 93 | } |
| 94 | |
| 95 | phy->hw.base = ptr; |
| 96 | |
| 97 | pr_debug("[%s] map dsi_phy registers to %p\n", phy->name, phy->hw.base); |
| 98 | |
| 99 | return rc; |
| 100 | } |
| 101 | |
| 102 | static int dsi_phy_regmap_deinit(struct msm_dsi_phy *phy) |
| 103 | { |
| 104 | pr_debug("[%s] unmap registers\n", phy->name); |
| 105 | return 0; |
| 106 | } |
| 107 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 108 | static int dsi_phy_supplies_init(struct platform_device *pdev, |
| 109 | struct msm_dsi_phy *phy) |
| 110 | { |
| 111 | int rc = 0; |
| 112 | int i = 0; |
| 113 | struct dsi_regulator_info *regs; |
| 114 | struct regulator *vreg = NULL; |
| 115 | |
| 116 | regs = &phy->pwr_info.digital; |
| 117 | regs->vregs = devm_kzalloc(&pdev->dev, sizeof(struct dsi_vreg), |
| 118 | GFP_KERNEL); |
| 119 | if (!regs->vregs) |
| 120 | goto error; |
| 121 | |
| 122 | regs->count = 1; |
| 123 | snprintf(regs->vregs->vreg_name, |
| 124 | ARRAY_SIZE(regs->vregs[i].vreg_name), |
| 125 | "%s", "gdsc"); |
| 126 | |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 127 | rc = dsi_pwr_get_dt_vreg_data(&pdev->dev, |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 128 | &phy->pwr_info.phy_pwr, |
| 129 | "qcom,phy-supply-entries"); |
| 130 | if (rc) { |
| 131 | pr_err("failed to get host power supplies, rc = %d\n", rc); |
| 132 | goto error_digital; |
| 133 | } |
| 134 | |
| 135 | regs = &phy->pwr_info.digital; |
| 136 | for (i = 0; i < regs->count; i++) { |
| 137 | vreg = devm_regulator_get(&pdev->dev, regs->vregs[i].vreg_name); |
| 138 | rc = PTR_RET(vreg); |
| 139 | if (rc) { |
| 140 | pr_err("failed to get %s regulator\n", |
| 141 | regs->vregs[i].vreg_name); |
| 142 | goto error_host_pwr; |
| 143 | } |
| 144 | regs->vregs[i].vreg = vreg; |
| 145 | } |
| 146 | |
| 147 | regs = &phy->pwr_info.phy_pwr; |
| 148 | for (i = 0; i < regs->count; i++) { |
| 149 | vreg = devm_regulator_get(&pdev->dev, regs->vregs[i].vreg_name); |
| 150 | rc = PTR_RET(vreg); |
| 151 | if (rc) { |
| 152 | pr_err("failed to get %s regulator\n", |
| 153 | regs->vregs[i].vreg_name); |
| 154 | for (--i; i >= 0; i--) |
| 155 | devm_regulator_put(regs->vregs[i].vreg); |
| 156 | goto error_digital_put; |
| 157 | } |
| 158 | regs->vregs[i].vreg = vreg; |
| 159 | } |
| 160 | |
| 161 | return rc; |
| 162 | |
| 163 | error_digital_put: |
| 164 | regs = &phy->pwr_info.digital; |
| 165 | for (i = 0; i < regs->count; i++) |
| 166 | devm_regulator_put(regs->vregs[i].vreg); |
| 167 | error_host_pwr: |
| 168 | devm_kfree(&pdev->dev, phy->pwr_info.phy_pwr.vregs); |
| 169 | phy->pwr_info.phy_pwr.vregs = NULL; |
| 170 | phy->pwr_info.phy_pwr.count = 0; |
| 171 | error_digital: |
| 172 | devm_kfree(&pdev->dev, phy->pwr_info.digital.vregs); |
| 173 | phy->pwr_info.digital.vregs = NULL; |
| 174 | phy->pwr_info.digital.count = 0; |
| 175 | error: |
| 176 | return rc; |
| 177 | } |
| 178 | |
| 179 | static int dsi_phy_supplies_deinit(struct msm_dsi_phy *phy) |
| 180 | { |
| 181 | int i = 0; |
| 182 | int rc = 0; |
| 183 | struct dsi_regulator_info *regs; |
| 184 | |
| 185 | regs = &phy->pwr_info.digital; |
| 186 | for (i = 0; i < regs->count; i++) { |
| 187 | if (!regs->vregs[i].vreg) |
| 188 | pr_err("vreg is NULL, should not reach here\n"); |
| 189 | else |
| 190 | devm_regulator_put(regs->vregs[i].vreg); |
| 191 | } |
| 192 | |
| 193 | regs = &phy->pwr_info.phy_pwr; |
| 194 | for (i = 0; i < regs->count; i++) { |
| 195 | if (!regs->vregs[i].vreg) |
| 196 | pr_err("vreg is NULL, should not reach here\n"); |
| 197 | else |
| 198 | devm_regulator_put(regs->vregs[i].vreg); |
| 199 | } |
| 200 | |
| 201 | if (phy->pwr_info.phy_pwr.vregs) { |
| 202 | devm_kfree(&phy->pdev->dev, phy->pwr_info.phy_pwr.vregs); |
| 203 | phy->pwr_info.phy_pwr.vregs = NULL; |
| 204 | phy->pwr_info.phy_pwr.count = 0; |
| 205 | } |
| 206 | if (phy->pwr_info.digital.vregs) { |
| 207 | devm_kfree(&phy->pdev->dev, phy->pwr_info.digital.vregs); |
| 208 | phy->pwr_info.digital.vregs = NULL; |
| 209 | phy->pwr_info.digital.count = 0; |
| 210 | } |
| 211 | |
| 212 | return rc; |
| 213 | } |
| 214 | |
| 215 | static int dsi_phy_parse_dt_per_lane_cfgs(struct platform_device *pdev, |
| 216 | struct dsi_phy_per_lane_cfgs *cfg, |
| 217 | char *property) |
| 218 | { |
| 219 | int rc = 0, i = 0, j = 0; |
| 220 | const u8 *data; |
| 221 | u32 len = 0; |
| 222 | |
| 223 | data = of_get_property(pdev->dev.of_node, property, &len); |
| 224 | if (!data) { |
| 225 | pr_err("Unable to read Phy %s settings\n", property); |
| 226 | return -EINVAL; |
| 227 | } |
| 228 | |
| 229 | if (len != DSI_LANE_MAX * cfg->count_per_lane) { |
| 230 | pr_err("incorrect phy %s settings, exp=%d, act=%d\n", |
| 231 | property, (DSI_LANE_MAX * cfg->count_per_lane), len); |
| 232 | return -EINVAL; |
| 233 | } |
| 234 | |
| 235 | for (i = DSI_LOGICAL_LANE_0; i < DSI_LANE_MAX; i++) { |
| 236 | for (j = 0; j < cfg->count_per_lane; j++) { |
| 237 | cfg->lane[i][j] = *data; |
| 238 | data++; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | return rc; |
| 243 | } |
| 244 | |
| 245 | static int dsi_phy_settings_init(struct platform_device *pdev, |
| 246 | struct msm_dsi_phy *phy) |
| 247 | { |
| 248 | int rc = 0; |
| 249 | struct dsi_phy_per_lane_cfgs *lane = &phy->cfg.lanecfg; |
| 250 | struct dsi_phy_per_lane_cfgs *strength = &phy->cfg.strength; |
| 251 | struct dsi_phy_per_lane_cfgs *timing = &phy->cfg.timing; |
| 252 | struct dsi_phy_per_lane_cfgs *regs = &phy->cfg.regulators; |
| 253 | |
| 254 | lane->count_per_lane = phy->ver_info->lane_cfg_count; |
| 255 | rc = dsi_phy_parse_dt_per_lane_cfgs(pdev, lane, |
| 256 | "qcom,platform-lane-config"); |
| 257 | if (rc) { |
| 258 | pr_err("failed to parse lane cfgs, rc=%d\n", rc); |
| 259 | goto err; |
| 260 | } |
| 261 | |
| 262 | strength->count_per_lane = phy->ver_info->strength_cfg_count; |
| 263 | rc = dsi_phy_parse_dt_per_lane_cfgs(pdev, strength, |
| 264 | "qcom,platform-strength-ctrl"); |
| 265 | if (rc) { |
| 266 | pr_err("failed to parse lane cfgs, rc=%d\n", rc); |
| 267 | goto err; |
| 268 | } |
| 269 | |
| 270 | regs->count_per_lane = phy->ver_info->regulator_cfg_count; |
| 271 | rc = dsi_phy_parse_dt_per_lane_cfgs(pdev, regs, |
| 272 | "qcom,platform-regulator-settings"); |
| 273 | if (rc) { |
| 274 | pr_err("failed to parse lane cfgs, rc=%d\n", rc); |
| 275 | goto err; |
| 276 | } |
| 277 | |
| 278 | /* Actual timing values are dependent on panel */ |
| 279 | timing->count_per_lane = phy->ver_info->timing_cfg_count; |
| 280 | |
| 281 | err: |
| 282 | lane->count_per_lane = 0; |
| 283 | strength->count_per_lane = 0; |
| 284 | regs->count_per_lane = 0; |
| 285 | timing->count_per_lane = 0; |
| 286 | return rc; |
| 287 | } |
| 288 | |
| 289 | static int dsi_phy_settings_deinit(struct msm_dsi_phy *phy) |
| 290 | { |
| 291 | memset(&phy->cfg.lanecfg, 0x0, sizeof(phy->cfg.lanecfg)); |
| 292 | memset(&phy->cfg.strength, 0x0, sizeof(phy->cfg.strength)); |
| 293 | memset(&phy->cfg.timing, 0x0, sizeof(phy->cfg.timing)); |
| 294 | memset(&phy->cfg.regulators, 0x0, sizeof(phy->cfg.regulators)); |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | static int dsi_phy_driver_probe(struct platform_device *pdev) |
| 299 | { |
| 300 | struct msm_dsi_phy *dsi_phy; |
| 301 | struct dsi_phy_list_item *item; |
| 302 | const struct of_device_id *id; |
| 303 | const struct dsi_ver_spec_info *ver_info; |
| 304 | int rc = 0; |
| 305 | u32 index = 0; |
| 306 | |
| 307 | if (!pdev || !pdev->dev.of_node) { |
| 308 | pr_err("pdev not found\n"); |
| 309 | return -ENODEV; |
| 310 | } |
| 311 | |
| 312 | id = of_match_node(msm_dsi_phy_of_match, pdev->dev.of_node); |
| 313 | if (!id) |
| 314 | return -ENODEV; |
| 315 | |
| 316 | ver_info = id->data; |
| 317 | |
| 318 | item = devm_kzalloc(&pdev->dev, sizeof(*item), GFP_KERNEL); |
| 319 | if (!item) |
| 320 | return -ENOMEM; |
| 321 | |
| 322 | |
| 323 | dsi_phy = devm_kzalloc(&pdev->dev, sizeof(*dsi_phy), GFP_KERNEL); |
| 324 | if (!dsi_phy) { |
| 325 | devm_kfree(&pdev->dev, item); |
| 326 | return -ENOMEM; |
| 327 | } |
| 328 | |
| 329 | rc = of_property_read_u32(pdev->dev.of_node, "cell-index", &index); |
| 330 | if (rc) { |
| 331 | pr_debug("cell index not set, default to 0\n"); |
| 332 | index = 0; |
| 333 | } |
| 334 | |
| 335 | dsi_phy->index = index; |
| 336 | |
| 337 | dsi_phy->name = of_get_property(pdev->dev.of_node, "label", NULL); |
| 338 | if (!dsi_phy->name) |
| 339 | dsi_phy->name = DSI_PHY_DEFAULT_LABEL; |
| 340 | |
| 341 | pr_debug("Probing %s device\n", dsi_phy->name); |
| 342 | |
| 343 | rc = dsi_phy_regmap_init(pdev, dsi_phy); |
| 344 | if (rc) { |
| 345 | pr_err("Failed to parse register information, rc=%d\n", rc); |
| 346 | goto fail; |
| 347 | } |
| 348 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 349 | rc = dsi_phy_supplies_init(pdev, dsi_phy); |
| 350 | if (rc) { |
| 351 | pr_err("failed to parse voltage supplies, rc = %d\n", rc); |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 352 | goto fail_regmap; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | rc = dsi_catalog_phy_setup(&dsi_phy->hw, ver_info->version, |
| 356 | dsi_phy->index); |
| 357 | if (rc) { |
| 358 | pr_err("Catalog does not support version (%d)\n", |
| 359 | ver_info->version); |
| 360 | goto fail_supplies; |
| 361 | } |
| 362 | |
| 363 | dsi_phy->ver_info = ver_info; |
| 364 | rc = dsi_phy_settings_init(pdev, dsi_phy); |
| 365 | if (rc) { |
| 366 | pr_err("Failed to parse phy setting, rc=%d\n", rc); |
| 367 | goto fail_supplies; |
| 368 | } |
| 369 | |
| 370 | item->phy = dsi_phy; |
| 371 | |
| 372 | mutex_lock(&dsi_phy_list_lock); |
| 373 | list_add(&item->list, &dsi_phy_list); |
| 374 | mutex_unlock(&dsi_phy_list_lock); |
| 375 | |
| 376 | mutex_init(&dsi_phy->phy_lock); |
| 377 | /** TODO: initialize debugfs */ |
| 378 | dsi_phy->pdev = pdev; |
| 379 | platform_set_drvdata(pdev, dsi_phy); |
| 380 | pr_debug("Probe successful for %s\n", dsi_phy->name); |
| 381 | return 0; |
| 382 | |
| 383 | fail_supplies: |
| 384 | (void)dsi_phy_supplies_deinit(dsi_phy); |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 385 | fail_regmap: |
| 386 | (void)dsi_phy_regmap_deinit(dsi_phy); |
| 387 | fail: |
| 388 | devm_kfree(&pdev->dev, dsi_phy); |
| 389 | devm_kfree(&pdev->dev, item); |
| 390 | return rc; |
| 391 | } |
| 392 | |
| 393 | static int dsi_phy_driver_remove(struct platform_device *pdev) |
| 394 | { |
| 395 | int rc = 0; |
| 396 | struct msm_dsi_phy *phy = platform_get_drvdata(pdev); |
| 397 | struct list_head *pos, *tmp; |
| 398 | |
| 399 | if (!pdev || !phy) { |
| 400 | pr_err("Invalid device\n"); |
| 401 | return -EINVAL; |
| 402 | } |
| 403 | |
| 404 | mutex_lock(&dsi_phy_list_lock); |
| 405 | list_for_each_safe(pos, tmp, &dsi_phy_list) { |
| 406 | struct dsi_phy_list_item *n; |
| 407 | |
| 408 | n = list_entry(pos, struct dsi_phy_list_item, list); |
| 409 | if (n->phy == phy) { |
| 410 | list_del(&n->list); |
| 411 | devm_kfree(&pdev->dev, n); |
| 412 | break; |
| 413 | } |
| 414 | } |
| 415 | mutex_unlock(&dsi_phy_list_lock); |
| 416 | |
| 417 | mutex_lock(&phy->phy_lock); |
| 418 | rc = dsi_phy_settings_deinit(phy); |
| 419 | if (rc) |
| 420 | pr_err("failed to deinitialize phy settings, rc=%d\n", rc); |
| 421 | |
| 422 | rc = dsi_phy_supplies_deinit(phy); |
| 423 | if (rc) |
| 424 | pr_err("failed to deinitialize voltage supplies, rc=%d\n", rc); |
| 425 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 426 | rc = dsi_phy_regmap_deinit(phy); |
| 427 | if (rc) |
| 428 | pr_err("failed to deinitialize regmap, rc=%d\n", rc); |
| 429 | mutex_unlock(&phy->phy_lock); |
| 430 | |
| 431 | mutex_destroy(&phy->phy_lock); |
| 432 | devm_kfree(&pdev->dev, phy); |
| 433 | |
| 434 | platform_set_drvdata(pdev, NULL); |
| 435 | |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | static struct platform_driver dsi_phy_platform_driver = { |
| 440 | .probe = dsi_phy_driver_probe, |
| 441 | .remove = dsi_phy_driver_remove, |
| 442 | .driver = { |
Ajay Singh Parmar | 64c1919 | 2016-06-10 16:44:56 -0700 | [diff] [blame] | 443 | .name = "dsi_phy", |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 444 | .of_match_table = msm_dsi_phy_of_match, |
| 445 | }, |
| 446 | }; |
| 447 | |
| 448 | static void dsi_phy_enable_hw(struct msm_dsi_phy *phy) |
| 449 | { |
| 450 | if (phy->hw.ops.regulator_enable) |
| 451 | phy->hw.ops.regulator_enable(&phy->hw, &phy->cfg.regulators); |
| 452 | |
| 453 | if (phy->hw.ops.enable) |
| 454 | phy->hw.ops.enable(&phy->hw, &phy->cfg); |
| 455 | } |
| 456 | |
| 457 | static void dsi_phy_disable_hw(struct msm_dsi_phy *phy) |
| 458 | { |
| 459 | if (phy->hw.ops.disable) |
| 460 | phy->hw.ops.disable(&phy->hw); |
| 461 | |
| 462 | if (phy->hw.ops.regulator_disable) |
| 463 | phy->hw.ops.regulator_disable(&phy->hw); |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * dsi_phy_get() - get a dsi phy handle from device node |
| 468 | * @of_node: device node for dsi phy controller |
| 469 | * |
| 470 | * Gets the DSI PHY handle for the corresponding of_node. The ref count is |
| 471 | * incremented to one all subsequents get will fail until the original client |
| 472 | * calls a put. |
| 473 | * |
| 474 | * Return: DSI PHY handle or an error code. |
| 475 | */ |
| 476 | struct msm_dsi_phy *dsi_phy_get(struct device_node *of_node) |
| 477 | { |
| 478 | struct list_head *pos, *tmp; |
| 479 | struct msm_dsi_phy *phy = NULL; |
| 480 | |
| 481 | mutex_lock(&dsi_phy_list_lock); |
| 482 | list_for_each_safe(pos, tmp, &dsi_phy_list) { |
| 483 | struct dsi_phy_list_item *n; |
| 484 | |
| 485 | n = list_entry(pos, struct dsi_phy_list_item, list); |
| 486 | if (n->phy->pdev->dev.of_node == of_node) { |
| 487 | phy = n->phy; |
| 488 | break; |
| 489 | } |
| 490 | } |
| 491 | mutex_unlock(&dsi_phy_list_lock); |
| 492 | |
| 493 | if (!phy) { |
| 494 | pr_err("Device with of node not found\n"); |
| 495 | phy = ERR_PTR(-EPROBE_DEFER); |
| 496 | return phy; |
| 497 | } |
| 498 | |
| 499 | mutex_lock(&phy->phy_lock); |
| 500 | if (phy->refcount > 0) { |
| 501 | pr_err("[PHY_%d] Device under use\n", phy->index); |
| 502 | phy = ERR_PTR(-EINVAL); |
| 503 | } else { |
| 504 | phy->refcount++; |
| 505 | } |
| 506 | mutex_unlock(&phy->phy_lock); |
| 507 | return phy; |
| 508 | } |
| 509 | |
| 510 | /** |
| 511 | * dsi_phy_put() - release dsi phy handle |
| 512 | * @dsi_phy: DSI PHY handle. |
| 513 | * |
| 514 | * Release the DSI PHY hardware. Driver will clean up all resources and puts |
| 515 | * back the DSI PHY into reset state. |
| 516 | */ |
| 517 | void dsi_phy_put(struct msm_dsi_phy *dsi_phy) |
| 518 | { |
| 519 | mutex_lock(&dsi_phy->phy_lock); |
| 520 | |
| 521 | if (dsi_phy->refcount == 0) |
| 522 | pr_err("Unbalanced dsi_phy_put call\n"); |
| 523 | else |
| 524 | dsi_phy->refcount--; |
| 525 | |
| 526 | mutex_unlock(&dsi_phy->phy_lock); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * dsi_phy_drv_init() - initialize dsi phy driver |
| 531 | * @dsi_phy: DSI PHY handle. |
| 532 | * |
| 533 | * Initializes DSI PHY driver. Should be called after dsi_phy_get(). |
| 534 | * |
| 535 | * Return: error code. |
| 536 | */ |
| 537 | int dsi_phy_drv_init(struct msm_dsi_phy *dsi_phy) |
| 538 | { |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | /** |
| 543 | * dsi_phy_drv_deinit() - de-initialize dsi phy driver |
| 544 | * @dsi_phy: DSI PHY handle. |
| 545 | * |
| 546 | * Release all resources acquired by dsi_phy_drv_init(). |
| 547 | * |
| 548 | * Return: error code. |
| 549 | */ |
| 550 | int dsi_phy_drv_deinit(struct msm_dsi_phy *dsi_phy) |
| 551 | { |
| 552 | return 0; |
| 553 | } |
| 554 | |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 555 | int dsi_phy_clk_cb_register(struct msm_dsi_phy *dsi_phy, |
| 556 | struct clk_ctrl_cb *clk_cb) |
| 557 | { |
| 558 | if (!dsi_phy || !clk_cb) { |
| 559 | pr_err("Invalid params\n"); |
| 560 | return -EINVAL; |
| 561 | } |
| 562 | |
| 563 | dsi_phy->clk_cb.priv = clk_cb->priv; |
| 564 | dsi_phy->clk_cb.dsi_clk_cb = clk_cb->dsi_clk_cb; |
| 565 | return 0; |
| 566 | } |
| 567 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 568 | /** |
| 569 | * dsi_phy_validate_mode() - validate a display mode |
| 570 | * @dsi_phy: DSI PHY handle. |
| 571 | * @mode: Mode information. |
| 572 | * |
| 573 | * Validation will fail if the mode cannot be supported by the PHY driver or |
| 574 | * hardware. |
| 575 | * |
| 576 | * Return: error code. |
| 577 | */ |
| 578 | int dsi_phy_validate_mode(struct msm_dsi_phy *dsi_phy, |
| 579 | struct dsi_mode_info *mode) |
| 580 | { |
| 581 | int rc = 0; |
| 582 | |
| 583 | if (!dsi_phy || !mode) { |
| 584 | pr_err("Invalid params\n"); |
| 585 | return -EINVAL; |
| 586 | } |
| 587 | |
| 588 | mutex_lock(&dsi_phy->phy_lock); |
| 589 | |
| 590 | pr_debug("[PHY_%d] Skipping validation\n", dsi_phy->index); |
| 591 | |
| 592 | mutex_unlock(&dsi_phy->phy_lock); |
| 593 | return rc; |
| 594 | } |
| 595 | |
| 596 | /** |
| 597 | * dsi_phy_set_power_state() - enable/disable dsi phy power supplies |
| 598 | * @dsi_phy: DSI PHY handle. |
| 599 | * @enable: Boolean flag to enable/disable. |
| 600 | * |
| 601 | * Return: error code. |
| 602 | */ |
| 603 | int dsi_phy_set_power_state(struct msm_dsi_phy *dsi_phy, bool enable) |
| 604 | { |
| 605 | int rc = 0; |
| 606 | |
| 607 | if (!dsi_phy) { |
| 608 | pr_err("Invalid params\n"); |
| 609 | return -EINVAL; |
| 610 | } |
| 611 | |
| 612 | mutex_lock(&dsi_phy->phy_lock); |
| 613 | |
| 614 | if (enable == dsi_phy->power_state) { |
| 615 | pr_err("[PHY_%d] No state change\n", dsi_phy->index); |
| 616 | goto error; |
| 617 | } |
| 618 | |
| 619 | if (enable) { |
| 620 | rc = dsi_pwr_enable_regulator(&dsi_phy->pwr_info.digital, true); |
| 621 | if (rc) { |
| 622 | pr_err("failed to enable digital regulator\n"); |
| 623 | goto error; |
| 624 | } |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 625 | |
| 626 | if (dsi_phy->dsi_phy_state == DSI_PHY_ENGINE_OFF) { |
| 627 | rc = dsi_pwr_enable_regulator( |
| 628 | &dsi_phy->pwr_info.phy_pwr, true); |
| 629 | if (rc) { |
| 630 | pr_err("failed to enable phy power\n"); |
| 631 | (void)dsi_pwr_enable_regulator( |
| 632 | &dsi_phy->pwr_info.digital, false); |
| 633 | goto error; |
| 634 | } |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 635 | } |
| 636 | } else { |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 637 | if (dsi_phy->dsi_phy_state == DSI_PHY_ENGINE_OFF) { |
| 638 | rc = dsi_pwr_enable_regulator( |
| 639 | &dsi_phy->pwr_info.phy_pwr, false); |
| 640 | if (rc) { |
| 641 | pr_err("failed to enable digital regulator\n"); |
| 642 | goto error; |
| 643 | } |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 644 | } |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 645 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 646 | rc = dsi_pwr_enable_regulator(&dsi_phy->pwr_info.digital, |
| 647 | false); |
| 648 | if (rc) { |
| 649 | pr_err("failed to enable phy power\n"); |
| 650 | goto error; |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | dsi_phy->power_state = enable; |
| 655 | error: |
| 656 | mutex_unlock(&dsi_phy->phy_lock); |
| 657 | return rc; |
| 658 | } |
| 659 | |
| 660 | /** |
| 661 | * dsi_phy_enable() - enable DSI PHY hardware |
| 662 | * @dsi_phy: DSI PHY handle. |
| 663 | * @config: DSI host configuration. |
| 664 | * @pll_source: Source PLL for PHY clock. |
| 665 | * @skip_validation: Validation will not be performed on parameters. |
| 666 | * |
| 667 | * Validates and enables DSI PHY. |
| 668 | * |
| 669 | * Return: error code. |
| 670 | */ |
| 671 | int dsi_phy_enable(struct msm_dsi_phy *phy, |
| 672 | struct dsi_host_config *config, |
| 673 | enum dsi_phy_pll_source pll_source, |
| 674 | bool skip_validation) |
| 675 | { |
| 676 | int rc = 0; |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 677 | struct dsi_clk_ctrl_info clk_info; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 678 | |
| 679 | if (!phy || !config) { |
| 680 | pr_err("Invalid params\n"); |
| 681 | return -EINVAL; |
| 682 | } |
| 683 | |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 684 | clk_info.client = DSI_CLK_REQ_DSI_CLIENT; |
| 685 | clk_info.clk_type = DSI_CORE_CLK; |
| 686 | clk_info.clk_state = DSI_CLK_ON; |
| 687 | |
| 688 | rc = phy->clk_cb.dsi_clk_cb(phy->clk_cb.priv, clk_info); |
| 689 | if (rc) { |
| 690 | pr_err("failed to enable DSI core clocks\n"); |
| 691 | return rc; |
| 692 | } |
| 693 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 694 | mutex_lock(&phy->phy_lock); |
| 695 | |
| 696 | if (!skip_validation) |
| 697 | pr_debug("[PHY_%d] TODO: perform validation\n", phy->index); |
| 698 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 699 | memcpy(&phy->mode, &config->video_timing, sizeof(phy->mode)); |
Padmanabhan Komanduru | 8ee8ee5 | 2016-12-19 12:10:51 +0530 | [diff] [blame^] | 700 | memcpy(&phy->cfg.lane_map, &config->lane_map, sizeof(config->lane_map)); |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 701 | phy->data_lanes = config->common_config.data_lanes; |
| 702 | phy->dst_format = config->common_config.dst_format; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 703 | phy->cfg.pll_source = pll_source; |
| 704 | |
| 705 | rc = phy->hw.ops.calculate_timing_params(&phy->hw, |
| 706 | &phy->mode, |
| 707 | &config->common_config, |
| 708 | &phy->cfg.timing); |
| 709 | if (rc) { |
| 710 | pr_err("[%s] failed to set timing, rc=%d\n", phy->name, rc); |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 711 | goto error; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | dsi_phy_enable_hw(phy); |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 715 | phy->dsi_phy_state = DSI_PHY_ENGINE_ON; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 716 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 717 | error: |
| 718 | mutex_unlock(&phy->phy_lock); |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 719 | |
| 720 | clk_info.clk_state = DSI_CLK_OFF; |
| 721 | rc = phy->clk_cb.dsi_clk_cb(phy->clk_cb.priv, clk_info); |
| 722 | if (rc) |
| 723 | pr_err("failed to disable DSI core clocks\n"); |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 724 | return rc; |
| 725 | } |
| 726 | |
| 727 | /** |
| 728 | * dsi_phy_disable() - disable DSI PHY hardware. |
| 729 | * @phy: DSI PHY handle. |
| 730 | * |
| 731 | * Return: error code. |
| 732 | */ |
| 733 | int dsi_phy_disable(struct msm_dsi_phy *phy) |
| 734 | { |
| 735 | int rc = 0; |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 736 | struct dsi_clk_ctrl_info clk_info; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 737 | |
| 738 | if (!phy) { |
| 739 | pr_err("Invalid params\n"); |
| 740 | return -EINVAL; |
| 741 | } |
| 742 | |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 743 | clk_info.client = DSI_CLK_REQ_DSI_CLIENT; |
| 744 | clk_info.clk_type = DSI_CORE_CLK; |
| 745 | clk_info.clk_state = DSI_CLK_ON; |
| 746 | |
| 747 | rc = phy->clk_cb.dsi_clk_cb(phy->clk_cb.priv, clk_info); |
| 748 | if (rc) { |
| 749 | pr_err("failed to enable DSI core clocks\n"); |
| 750 | return rc; |
| 751 | } |
| 752 | |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 753 | mutex_lock(&phy->phy_lock); |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 754 | dsi_phy_disable_hw(phy); |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 755 | phy->dsi_phy_state = DSI_PHY_ENGINE_OFF; |
| 756 | mutex_unlock(&phy->phy_lock); |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 757 | |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 758 | clk_info.clk_state = DSI_CLK_OFF; |
| 759 | |
| 760 | rc = phy->clk_cb.dsi_clk_cb(phy->clk_cb.priv, clk_info); |
| 761 | if (rc) |
| 762 | pr_err("failed to disable DSI core clocks\n"); |
| 763 | |
| 764 | return rc; |
| 765 | } |
| 766 | |
| 767 | /** |
| 768 | * dsi_phy_idle_ctrl() - enable/disable DSI PHY during idle screen |
| 769 | * @phy: DSI PHY handle |
| 770 | * @enable: boolean to specify PHY enable/disable. |
| 771 | * |
| 772 | * Return: error code. |
| 773 | */ |
| 774 | |
| 775 | int dsi_phy_idle_ctrl(struct msm_dsi_phy *phy, bool enable) |
| 776 | { |
| 777 | if (!phy) { |
| 778 | pr_err("Invalid params\n"); |
| 779 | return -EINVAL; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 780 | } |
| 781 | |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 782 | mutex_lock(&phy->phy_lock); |
| 783 | if (enable) { |
| 784 | if (phy->hw.ops.phy_idle_on) |
| 785 | phy->hw.ops.phy_idle_on(&phy->hw, &phy->cfg); |
| 786 | |
| 787 | if (phy->hw.ops.regulator_enable) |
| 788 | phy->hw.ops.regulator_enable(&phy->hw, |
| 789 | &phy->cfg.regulators); |
| 790 | } else { |
| 791 | if (phy->hw.ops.phy_idle_off) |
| 792 | phy->hw.ops.phy_idle_off(&phy->hw); |
| 793 | } |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 794 | mutex_unlock(&phy->phy_lock); |
Padmanabhan Komanduru | dbd2fb0 | 2016-12-02 15:18:49 +0530 | [diff] [blame] | 795 | |
| 796 | return 0; |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | /** |
| 800 | * dsi_phy_set_timing_params() - timing parameters for the panel |
| 801 | * @phy: DSI PHY handle |
| 802 | * @timing: array holding timing params. |
| 803 | * @size: size of the array. |
| 804 | * |
| 805 | * When PHY timing calculator is not implemented, this array will be used to |
| 806 | * pass PHY timing information. |
| 807 | * |
| 808 | * Return: error code. |
| 809 | */ |
| 810 | int dsi_phy_set_timing_params(struct msm_dsi_phy *phy, |
| 811 | u8 *timing, u32 size) |
| 812 | { |
| 813 | int rc = 0; |
| 814 | int i, j; |
| 815 | struct dsi_phy_per_lane_cfgs *timing_cfg; |
| 816 | |
| 817 | if (!phy || !timing || !size) { |
| 818 | pr_err("Invalid params\n"); |
| 819 | return -EINVAL; |
| 820 | } |
| 821 | |
| 822 | mutex_lock(&phy->phy_lock); |
| 823 | |
| 824 | if (size != (DSI_LANE_MAX * phy->cfg.timing.count_per_lane)) { |
| 825 | pr_err("Unexpected timing array size %d\n", size); |
| 826 | rc = -EINVAL; |
| 827 | } else { |
| 828 | timing_cfg = &phy->cfg.timing; |
| 829 | for (i = DSI_LOGICAL_LANE_0; i < DSI_LANE_MAX; i++) { |
| 830 | for (j = 0; j < timing_cfg->count_per_lane; j++) { |
| 831 | timing_cfg->lane[i][j] = *timing; |
| 832 | timing++; |
| 833 | } |
| 834 | } |
| 835 | } |
| 836 | mutex_unlock(&phy->phy_lock); |
| 837 | return rc; |
| 838 | } |
| 839 | |
Ajay Singh Parmar | 64c1919 | 2016-06-10 16:44:56 -0700 | [diff] [blame] | 840 | void dsi_phy_drv_register(void) |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 841 | { |
| 842 | platform_driver_register(&dsi_phy_platform_driver); |
| 843 | } |
| 844 | |
Ajay Singh Parmar | 64c1919 | 2016-06-10 16:44:56 -0700 | [diff] [blame] | 845 | void dsi_phy_drv_unregister(void) |
Ajay Singh Parmar | 67f3132 | 2016-06-22 17:37:56 -0700 | [diff] [blame] | 846 | { |
| 847 | platform_driver_unregister(&dsi_phy_platform_driver); |
| 848 | } |