drivers/gpu/drm/arm/malidp_drv.c

   1 /*
   2  * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
   3  * Author: Liviu Dudau <[email protected]>
   4  *
   5  * This program is free software and is provided to you under the terms of the
   6  * GNU General Public License version 2 as published by the Free Software
   7  * Foundation, and any use by you of this program is subject to the terms
   8  * of such GNU licence.
   9  *
  10  * ARM Mali DP500/DP550/DP650 KMS/DRM driver
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/clk.h>
  15 #include <linux/component.h>
  16 #include <linux/of_device.h>
  17 #include <linux/of_graph.h>
  18 #include <linux/of_reserved_mem.h>
  19 #include <linux/pm_runtime.h>
  20
  21 #include <drm/drmP.h>
  22 #include <drm/drm_atomic.h>
  23 #include <drm/drm_atomic_helper.h>
  24 #include <drm/drm_crtc.h>
  25 #include <drm/drm_crtc_helper.h>
  26 #include <drm/drm_fb_helper.h>
  27 #include <drm/drm_fb_cma_helper.h>
  28 #include <drm/drm_gem_cma_helper.h>
  29 #include <drm/drm_gem_framebuffer_helper.h>
  30 #include <drm/drm_modeset_helper.h>
  31 #include <drm/drm_of.h>
  32
  33 #include "malidp_drv.h"
  34 #include "malidp_regs.h"
  35 #include "malidp_hw.h"
  36
  37 #define MALIDP_CONF_VALID_TIMEOUT       250
  38
  39 static void malidp_write_gamma_table(struct malidp_hw_device *hwdev,
  40                                      u32 data[MALIDP_COEFFTAB_NUM_COEFFS])
  41 {
  42         int i;
  43         /* Update all channels with a single gamma curve. */
  44         const u32 gamma_write_mask = GENMASK(18, 16);
  45         /*
  46          * Always write an entire table, so the address field in
  47          * DE_COEFFTAB_ADDR is 0 and we can use the gamma_write_mask bitmask
  48          * directly.
  49          */
  50         malidp_hw_write(hwdev, gamma_write_mask,
  51                         hwdev->hw->map.coeffs_base + MALIDP_COEF_TABLE_ADDR);
  52         for (i = 0; i < MALIDP_COEFFTAB_NUM_COEFFS; ++i)
  53                 malidp_hw_write(hwdev, data[i],
  54                                 hwdev->hw->map.coeffs_base +
  55                                 MALIDP_COEF_TABLE_DATA);
  56 }
  57
  58 static void malidp_atomic_commit_update_gamma(struct drm_crtc *crtc,
  59                                               struct drm_crtc_state *old_state)
  60 {
  61         struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
  62         struct malidp_hw_device *hwdev = malidp->dev;
  63
  64         if (!crtc->state->color_mgmt_changed)
  65                 return;
  66
  67         if (!crtc->state->gamma_lut) {
  68                 malidp_hw_clearbits(hwdev,
  69                                     MALIDP_DISP_FUNC_GAMMA,
  70                                     MALIDP_DE_DISPLAY_FUNC);
  71         } else {
  72                 struct malidp_crtc_state *mc =
  73                         to_malidp_crtc_state(crtc->state);
  74
  75                 if (!old_state->gamma_lut || (crtc->state->gamma_lut->base.id !=
  76                                               old_state->gamma_lut->base.id))
  77                         malidp_write_gamma_table(hwdev, mc->gamma_coeffs);
  78
  79                 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_GAMMA,
  80                                   MALIDP_DE_DISPLAY_FUNC);
  81         }
  82 }
  83
  84 static
  85 void malidp_atomic_commit_update_coloradj(struct drm_crtc *crtc,
  86                                           struct drm_crtc_state *old_state)
  87 {
  88         struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
  89         struct malidp_hw_device *hwdev = malidp->dev;
  90         int i;
  91
  92         if (!crtc->state->color_mgmt_changed)
  93                 return;
  94
  95         if (!crtc->state->ctm) {
  96                 malidp_hw_clearbits(hwdev, MALIDP_DISP_FUNC_CADJ,
  97                                     MALIDP_DE_DISPLAY_FUNC);
  98         } else {
  99                 struct malidp_crtc_state *mc =
 100                         to_malidp_crtc_state(crtc->state);
 101
 102                 if (!old_state->ctm || (crtc->state->ctm->base.id !=
 103                                         old_state->ctm->base.id))
 104                         for (i = 0; i < MALIDP_COLORADJ_NUM_COEFFS; ++i)
 105                                 malidp_hw_write(hwdev,
 106                                                 mc->coloradj_coeffs[i],
 107                                                 hwdev->hw->map.coeffs_base +
 108                                                 MALIDP_COLOR_ADJ_COEF + 4 * i);
 109
 110                 malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_CADJ,
 111                                   MALIDP_DE_DISPLAY_FUNC);
 112         }
 113 }
 114
 115 static void malidp_atomic_commit_se_config(struct drm_crtc *crtc,
 116                                            struct drm_crtc_state *old_state)
 117 {
 118         struct malidp_crtc_state *cs = to_malidp_crtc_state(crtc->state);
 119         struct malidp_crtc_state *old_cs = to_malidp_crtc_state(old_state);
 120         struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
 121         struct malidp_hw_device *hwdev = malidp->dev;
 122         struct malidp_se_config *s = &cs->scaler_config;
 123         struct malidp_se_config *old_s = &old_cs->scaler_config;
 124         u32 se_control = hwdev->hw->map.se_base +
 125                          ((hwdev->hw->map.features & MALIDP_REGMAP_HAS_CLEARIRQ) ?
 126                          0x10 : 0xC);
 127         u32 layer_control = se_control + MALIDP_SE_LAYER_CONTROL;
 128         u32 scr = se_control + MALIDP_SE_SCALING_CONTROL;
 129         u32 val;
 130
 131         /* Set SE_CONTROL */
 132         if (!s->scale_enable) {
 133                 val = malidp_hw_read(hwdev, se_control);
 134                 val &= ~MALIDP_SE_SCALING_EN;
 135                 malidp_hw_write(hwdev, val, se_control);
 136                 return;
 137         }
 138
 139         hwdev->hw->se_set_scaling_coeffs(hwdev, s, old_s);
 140         val = malidp_hw_read(hwdev, se_control);
 141         val |= MALIDP_SE_SCALING_EN | MALIDP_SE_ALPHA_EN;
 142
 143         val &= ~MALIDP_SE_ENH(MALIDP_SE_ENH_MASK);
 144         val |= s->enhancer_enable ? MALIDP_SE_ENH(3) : 0;
 145
 146         val |= MALIDP_SE_RGBO_IF_EN;
 147         malidp_hw_write(hwdev, val, se_control);
 148
 149         /* Set IN_SIZE & OUT_SIZE. */
 150         val = MALIDP_SE_SET_V_SIZE(s->input_h) |
 151               MALIDP_SE_SET_H_SIZE(s->input_w);
 152         malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_IN_SIZE);
 153         val = MALIDP_SE_SET_V_SIZE(s->output_h) |
 154               MALIDP_SE_SET_H_SIZE(s->output_w);
 155         malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_OUT_SIZE);
 156
 157         /* Set phase regs. */
 158         malidp_hw_write(hwdev, s->h_init_phase, scr + MALIDP_SE_H_INIT_PH);
 159         malidp_hw_write(hwdev, s->h_delta_phase, scr + MALIDP_SE_H_DELTA_PH);
 160         malidp_hw_write(hwdev, s->v_init_phase, scr + MALIDP_SE_V_INIT_PH);
 161         malidp_hw_write(hwdev, s->v_delta_phase, scr + MALIDP_SE_V_DELTA_PH);
 162 }
 163
 164 /*
 165  * set the "config valid" bit and wait until the hardware acts on it
 166  */
 167 static int malidp_set_and_wait_config_valid(struct drm_device *drm)
 168 {
 169         struct malidp_drm *malidp = drm->dev_private;
 170         struct malidp_hw_device *hwdev = malidp->dev;
 171         int ret;
 172
 173         atomic_set(&malidp->config_valid, 0);
 174         hwdev->hw->set_config_valid(hwdev);
 175         /* don't wait for config_valid flag if we are in config mode */
 176         if (hwdev->hw->in_config_mode(hwdev))
 177                 return 0;
 178
 179         ret = wait_event_interruptible_timeout(malidp->wq,
 180                         atomic_read(&malidp->config_valid) == 1,
 181                         msecs_to_jiffies(MALIDP_CONF_VALID_TIMEOUT));
 182
 183         return (ret > 0) ? 0 : -ETIMEDOUT;
 184 }
 185
 186 static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state)
 187 {
 188         struct drm_pending_vblank_event *event;
 189         struct drm_device *drm = state->dev;
 190         struct malidp_drm *malidp = drm->dev_private;
 191
 192         if (malidp->crtc.enabled) {
 193                 /* only set config_valid if the CRTC is enabled */
 194                 if (malidp_set_and_wait_config_valid(drm))
 195                         DRM_DEBUG_DRIVER("timed out waiting for updated configuration\n");
 196         }
 197
 198         event = malidp->crtc.state->event;
 199         if (event) {
 200                 malidp->crtc.state->event = NULL;
 201
 202                 spin_lock_irq(&drm->event_lock);
 203                 if (drm_crtc_vblank_get(&malidp->crtc) == 0)
 204                         drm_crtc_arm_vblank_event(&malidp->crtc, event);
 205                 else
 206                         drm_crtc_send_vblank_event(&malidp->crtc, event);
 207                 spin_unlock_irq(&drm->event_lock);
 208         }
 209         drm_atomic_helper_commit_hw_done(state);
 210 }
 211
 212 static void malidp_atomic_commit_tail(struct drm_atomic_state *state)
 213 {
 214         struct drm_device *drm = state->dev;
 215         struct drm_crtc *crtc;
 216         struct drm_crtc_state *old_crtc_state;
 217         int i;
 218
 219         pm_runtime_get_sync(drm->dev);
 220
 221         drm_atomic_helper_commit_modeset_disables(drm, state);
 222
 223         for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
 224                 malidp_atomic_commit_update_gamma(crtc, old_crtc_state);
 225                 malidp_atomic_commit_update_coloradj(crtc, old_crtc_state);
 226                 malidp_atomic_commit_se_config(crtc, old_crtc_state);
 227         }
 228
 229         drm_atomic_helper_commit_planes(drm, state, 0);
 230
 231         drm_atomic_helper_commit_modeset_enables(drm, state);
 232
 233         malidp_atomic_commit_hw_done(state);
 234
 235         drm_atomic_helper_wait_for_vblanks(drm, state);
 236
 237         pm_runtime_put(drm->dev);
 238
 239         drm_atomic_helper_cleanup_planes(drm, state);
 240 }
 241
 242 static const struct drm_mode_config_helper_funcs malidp_mode_config_helpers = {
 243         .atomic_commit_tail = malidp_atomic_commit_tail,
 244 };
 245
 246 static const struct drm_mode_config_funcs malidp_mode_config_funcs = {
 247         .fb_create = drm_gem_fb_create,
 248         .output_poll_changed = drm_fb_helper_output_poll_changed,
 249         .atomic_check = drm_atomic_helper_check,
 250         .atomic_commit = drm_atomic_helper_commit,
 251 };
 252
 253 static int malidp_init(struct drm_device *drm)
 254 {
 255         int ret;
 256         struct malidp_drm *malidp = drm->dev_private;
 257         struct malidp_hw_device *hwdev = malidp->dev;
 258
 259         drm_mode_config_init(drm);
 260
 261         drm->mode_config.min_width = hwdev->min_line_size;
 262         drm->mode_config.min_height = hwdev->min_line_size;
 263         drm->mode_config.max_width = hwdev->max_line_size;
 264         drm->mode_config.max_height = hwdev->max_line_size;
 265         drm->mode_config.funcs = &malidp_mode_config_funcs;
 266         drm->mode_config.helper_private = &malidp_mode_config_helpers;
 267
 268         ret = malidp_crtc_init(drm);
 269         if (ret) {
 270                 drm_mode_config_cleanup(drm);
 271                 return ret;
 272         }
 273
 274         return 0;
 275 }
 276
 277 static void malidp_fini(struct drm_device *drm)
 278 {
 279         malidp_de_planes_destroy(drm);
 280         drm_mode_config_cleanup(drm);
 281 }
 282
 283 static int malidp_irq_init(struct platform_device *pdev)
 284 {
 285         int irq_de, irq_se, ret = 0;
 286         struct drm_device *drm = dev_get_drvdata(&pdev->dev);
 287
 288         /* fetch the interrupts from DT */
 289         irq_de = platform_get_irq_byname(pdev, "DE");
 290         if (irq_de < 0) {
 291                 DRM_ERROR("no 'DE' IRQ specified!\n");
 292                 return irq_de;
 293         }
 294         irq_se = platform_get_irq_byname(pdev, "SE");
 295         if (irq_se < 0) {
 296                 DRM_ERROR("no 'SE' IRQ specified!\n");
 297                 return irq_se;
 298         }
 299
 300         ret = malidp_de_irq_init(drm, irq_de);
 301         if (ret)
 302                 return ret;
 303
 304         ret = malidp_se_irq_init(drm, irq_se);
 305         if (ret) {
 306                 malidp_de_irq_fini(drm);
 307                 return ret;
 308         }
 309
 310         return 0;
 311 }
 312
 313 DEFINE_DRM_GEM_CMA_FOPS(fops);
 314
 315 static struct drm_driver malidp_driver = {
 316         .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
 317                            DRIVER_PRIME,
 318         .lastclose = drm_fb_helper_lastclose,
 319         .gem_free_object_unlocked = drm_gem_cma_free_object,
 320         .gem_vm_ops = &drm_gem_cma_vm_ops,
 321         .dumb_create = drm_gem_cma_dumb_create,
 322         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 323         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 324         .gem_prime_export = drm_gem_prime_export,
 325         .gem_prime_import = drm_gem_prime_import,
 326         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 327         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 328         .gem_prime_vmap = drm_gem_cma_prime_vmap,
 329         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 330         .gem_prime_mmap = drm_gem_cma_prime_mmap,
 331         .fops = &fops,
 332         .name = "mali-dp",
 333         .desc = "ARM Mali Display Processor driver",
 334         .date = "20160106",
 335         .major = 1,
 336         .minor = 0,
 337 };
 338
 339 static const struct of_device_id  malidp_drm_of_match[] = {
 340         {
 341                 .compatible = "arm,mali-dp500",
 342                 .data = &malidp_device[MALIDP_500]
 343         },
 344         {
 345                 .compatible = "arm,mali-dp550",
 346                 .data = &malidp_device[MALIDP_550]
 347         },
 348         {
 349                 .compatible = "arm,mali-dp650",
 350                 .data = &malidp_device[MALIDP_650]
 351         },
 352         {},
 353 };
 354 MODULE_DEVICE_TABLE(of, malidp_drm_of_match);
 355
 356 static bool malidp_is_compatible_hw_id(struct malidp_hw_device *hwdev,
 357                                        const struct of_device_id *dev_id)
 358 {
 359         u32 core_id;
 360         const char *compatstr_dp500 = "arm,mali-dp500";
 361         bool is_dp500;
 362         bool dt_is_dp500;
 363
 364         /*
 365          * The DP500 CORE_ID register is in a different location, so check it
 366          * first. If the product id field matches, then this is DP500, otherwise
 367          * check the DP550/650 CORE_ID register.
 368          */
 369         core_id = malidp_hw_read(hwdev, MALIDP500_DC_BASE + MALIDP_DE_CORE_ID);
 370         /* Offset 0x18 will never read 0x500 on products other than DP500. */
 371         is_dp500 = (MALIDP_PRODUCT_ID(core_id) == 0x500);
 372         dt_is_dp500 = strnstr(dev_id->compatible, compatstr_dp500,
 373                               sizeof(dev_id->compatible)) != NULL;
 374         if (is_dp500 != dt_is_dp500) {
 375                 DRM_ERROR("Device-tree expects %s, but hardware %s DP500.\n",
 376                           dev_id->compatible, is_dp500 ? "is" : "is not");
 377                 return false;
 378         } else if (!dt_is_dp500) {
 379                 u16 product_id;
 380                 char buf[32];
 381
 382                 core_id = malidp_hw_read(hwdev,
 383                                          MALIDP550_DC_BASE + MALIDP_DE_CORE_ID);
 384                 product_id = MALIDP_PRODUCT_ID(core_id);
 385                 snprintf(buf, sizeof(buf), "arm,mali-dp%X", product_id);
 386                 if (!strnstr(dev_id->compatible, buf,
 387                              sizeof(dev_id->compatible))) {
 388                         DRM_ERROR("Device-tree expects %s, but hardware is DP%03X.\n",
 389                                   dev_id->compatible, product_id);
 390                         return false;
 391                 }
 392         }
 393         return true;
 394 }
 395
 396 static bool malidp_has_sufficient_address_space(const struct resource *res,
 397                                                 const struct of_device_id *dev_id)
 398 {
 399         resource_size_t res_size = resource_size(res);
 400         const char *compatstr_dp500 = "arm,mali-dp500";
 401
 402         if (!strnstr(dev_id->compatible, compatstr_dp500,
 403                      sizeof(dev_id->compatible)))
 404                 return res_size >= MALIDP550_ADDR_SPACE_SIZE;
 405         else if (res_size < MALIDP500_ADDR_SPACE_SIZE)
 406                 return false;
 407         return true;
 408 }
 409
 410 static ssize_t core_id_show(struct device *dev, struct device_attribute *attr,
 411                             char *buf)
 412 {
 413         struct drm_device *drm = dev_get_drvdata(dev);
 414         struct malidp_drm *malidp = drm->dev_private;
 415
 416         return snprintf(buf, PAGE_SIZE, "%08x\n", malidp->core_id);
 417 }
 418
 419 DEVICE_ATTR_RO(core_id);
 420
 421 static int malidp_init_sysfs(struct device *dev)
 422 {
 423         int ret = device_create_file(dev, &dev_attr_core_id);
 424
 425         if (ret)
 426                 DRM_ERROR("failed to create device file for core_id\n");
 427
 428         return ret;
 429 }
 430
 431 static void malidp_fini_sysfs(struct device *dev)
 432 {
 433         device_remove_file(dev, &dev_attr_core_id);
 434 }
 435
 436 #define MAX_OUTPUT_CHANNELS     3
 437
 438 static int malidp_runtime_pm_suspend(struct device *dev)
 439 {
 440         struct drm_device *drm = dev_get_drvdata(dev);
 441         struct malidp_drm *malidp = drm->dev_private;
 442         struct malidp_hw_device *hwdev = malidp->dev;
 443
 444         /* we can only suspend if the hardware is in config mode */
 445         WARN_ON(!hwdev->hw->in_config_mode(hwdev));
 446
 447         hwdev->pm_suspended = true;
 448         clk_disable_unprepare(hwdev->mclk);
 449         clk_disable_unprepare(hwdev->aclk);
 450         clk_disable_unprepare(hwdev->pclk);
 451
 452         return 0;
 453 }
 454
 455 static int malidp_runtime_pm_resume(struct device *dev)
 456 {
 457         struct drm_device *drm = dev_get_drvdata(dev);
 458         struct malidp_drm *malidp = drm->dev_private;
 459         struct malidp_hw_device *hwdev = malidp->dev;
 460
 461         clk_prepare_enable(hwdev->pclk);
 462         clk_prepare_enable(hwdev->aclk);
 463         clk_prepare_enable(hwdev->mclk);
 464         hwdev->pm_suspended = false;
 465
 466         return 0;
 467 }
 468
 469 static int malidp_bind(struct device *dev)
 470 {
 471         struct resource *res;
 472         struct drm_device *drm;
 473         struct malidp_drm *malidp;
 474         struct malidp_hw_device *hwdev;
 475         struct platform_device *pdev = to_platform_device(dev);
 476         struct of_device_id const *dev_id;
 477         /* number of lines for the R, G and B output */
 478         u8 output_width[MAX_OUTPUT_CHANNELS];
 479         int ret = 0, i;
 480         u32 version, out_depth = 0;
 481
 482         malidp = devm_kzalloc(dev, sizeof(*malidp), GFP_KERNEL);
 483         if (!malidp)
 484                 return -ENOMEM;
 485
 486         hwdev = devm_kzalloc(dev, sizeof(*hwdev), GFP_KERNEL);
 487         if (!hwdev)
 488                 return -ENOMEM;
 489
 490         hwdev->hw = (struct malidp_hw *)of_device_get_match_data(dev);
 491         malidp->dev = hwdev;
 492
 493         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 494         hwdev->regs = devm_ioremap_resource(dev, res);
 495         if (IS_ERR(hwdev->regs))
 496                 return PTR_ERR(hwdev->regs);
 497
 498         hwdev->pclk = devm_clk_get(dev, "pclk");
 499         if (IS_ERR(hwdev->pclk))
 500                 return PTR_ERR(hwdev->pclk);
 501
 502         hwdev->aclk = devm_clk_get(dev, "aclk");
 503         if (IS_ERR(hwdev->aclk))
 504                 return PTR_ERR(hwdev->aclk);
 505
 506         hwdev->mclk = devm_clk_get(dev, "mclk");
 507         if (IS_ERR(hwdev->mclk))
 508                 return PTR_ERR(hwdev->mclk);
 509
 510         hwdev->pxlclk = devm_clk_get(dev, "pxlclk");
 511         if (IS_ERR(hwdev->pxlclk))
 512                 return PTR_ERR(hwdev->pxlclk);
 513
 514         /* Get the optional framebuffer memory resource */
 515         ret = of_reserved_mem_device_init(dev);
 516         if (ret && ret != -ENODEV)
 517                 return ret;
 518
 519         drm = drm_dev_alloc(&malidp_driver, dev);
 520         if (IS_ERR(drm)) {
 521                 ret = PTR_ERR(drm);
 522                 goto alloc_fail;
 523         }
 524
 525         drm->dev_private = malidp;
 526         dev_set_drvdata(dev, drm);
 527
 528         /* Enable power management */
 529         pm_runtime_enable(dev);
 530
 531         /* Resume device to enable the clocks */
 532         if (pm_runtime_enabled(dev))
 533                 pm_runtime_get_sync(dev);
 534         else
 535                 malidp_runtime_pm_resume(dev);
 536
 537         dev_id = of_match_device(malidp_drm_of_match, dev);
 538         if (!dev_id) {
 539                 ret = -EINVAL;
 540                 goto query_hw_fail;
 541         }
 542
 543         if (!malidp_has_sufficient_address_space(res, dev_id)) {
 544                 DRM_ERROR("Insufficient address space in device-tree.\n");
 545                 ret = -EINVAL;
 546                 goto query_hw_fail;
 547         }
 548
 549         if (!malidp_is_compatible_hw_id(hwdev, dev_id)) {
 550                 ret = -EINVAL;
 551                 goto query_hw_fail;
 552         }
 553
 554         ret = hwdev->hw->query_hw(hwdev);
 555         if (ret) {
 556                 DRM_ERROR("Invalid HW configuration\n");
 557                 goto query_hw_fail;
 558         }
 559
 560         version = malidp_hw_read(hwdev, hwdev->hw->map.dc_base + MALIDP_DE_CORE_ID);
 561         DRM_INFO("found ARM Mali-DP%3x version r%dp%d\n", version >> 16,
 562                  (version >> 12) & 0xf, (version >> 8) & 0xf);
 563
 564         malidp->core_id = version;
 565
 566         /* set the number of lines used for output of RGB data */
 567         ret = of_property_read_u8_array(dev->of_node,
 568                                         "arm,malidp-output-port-lines",
 569                                         output_width, MAX_OUTPUT_CHANNELS);
 570         if (ret)
 571                 goto query_hw_fail;
 572
 573         for (i = 0; i < MAX_OUTPUT_CHANNELS; i++)
 574                 out_depth = (out_depth << 8) | (output_width[i] & 0xf);
 575         malidp_hw_write(hwdev, out_depth, hwdev->hw->map.out_depth_base);
 576
 577         atomic_set(&malidp->config_valid, 0);
 578         init_waitqueue_head(&malidp->wq);
 579
 580         ret = malidp_init(drm);
 581         if (ret < 0)
 582                 goto query_hw_fail;
 583
 584         ret = malidp_init_sysfs(dev);
 585         if (ret)
 586                 goto init_fail;
 587
 588         /* Set the CRTC's port so that the encoder component can find it */
 589         malidp->crtc.port = of_graph_get_port_by_id(dev->of_node, 0);
 590
 591         ret = component_bind_all(dev, drm);
 592         if (ret) {
 593                 DRM_ERROR("Failed to bind all components\n");
 594                 goto bind_fail;
 595         }
 596
 597         ret = malidp_irq_init(pdev);
 598         if (ret < 0)
 599                 goto irq_init_fail;
 600
 601         drm->irq_enabled = true;
 602
 603         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 604         if (ret < 0) {
 605                 DRM_ERROR("failed to initialise vblank\n");
 606                 goto vblank_fail;
 607         }
 608         pm_runtime_put(dev);
 609
 610         drm_mode_config_reset(drm);
 611
 612         ret = drm_fb_cma_fbdev_init(drm, 32, 0);
 613         if (ret)
 614                 goto fbdev_fail;
 615
 616         drm_kms_helper_poll_init(drm);
 617
 618         ret = drm_dev_register(drm, 0);
 619         if (ret)
 620                 goto register_fail;
 621
 622         return 0;
 623
 624 register_fail:
 625         drm_fb_cma_fbdev_fini(drm);
 626         drm_kms_helper_poll_fini(drm);
 627 fbdev_fail:
 628         pm_runtime_get_sync(dev);
 629 vblank_fail:
 630         malidp_se_irq_fini(drm);
 631         malidp_de_irq_fini(drm);
 632         drm->irq_enabled = false;
 633 irq_init_fail:
 634         component_unbind_all(dev, drm);
 635 bind_fail:
 636         of_node_put(malidp->crtc.port);
 637         malidp->crtc.port = NULL;
 638 init_fail:
 639         malidp_fini_sysfs(dev);
 640         malidp_fini(drm);
 641 query_hw_fail:
 642         pm_runtime_put(dev);
 643         if (pm_runtime_enabled(dev))
 644                 pm_runtime_disable(dev);
 645         else
 646                 malidp_runtime_pm_suspend(dev);
 647         drm->dev_private = NULL;
 648         dev_set_drvdata(dev, NULL);
 649         drm_dev_put(drm);
 650 alloc_fail:
 651         of_reserved_mem_device_release(dev);
 652
 653         return ret;
 654 }
 655
 656 static void malidp_unbind(struct device *dev)
 657 {
 658         struct drm_device *drm = dev_get_drvdata(dev);
 659         struct malidp_drm *malidp = drm->dev_private;
 660
 661         drm_dev_unregister(drm);
 662         drm_fb_cma_fbdev_fini(drm);
 663         drm_kms_helper_poll_fini(drm);
 664         pm_runtime_get_sync(dev);
 665         malidp_se_irq_fini(drm);
 666         malidp_de_irq_fini(drm);
 667         component_unbind_all(dev, drm);
 668         of_node_put(malidp->crtc.port);
 669         malidp->crtc.port = NULL;
 670         malidp_fini_sysfs(dev);
 671         malidp_fini(drm);
 672         pm_runtime_put(dev);
 673         if (pm_runtime_enabled(dev))
 674                 pm_runtime_disable(dev);
 675         else
 676                 malidp_runtime_pm_suspend(dev);
 677         drm->dev_private = NULL;
 678         dev_set_drvdata(dev, NULL);
 679         drm_dev_put(drm);
 680         of_reserved_mem_device_release(dev);
 681 }
 682
 683 static const struct component_master_ops malidp_master_ops = {
 684         .bind = malidp_bind,
 685         .unbind = malidp_unbind,
 686 };
 687
 688 static int malidp_compare_dev(struct device *dev, void *data)
 689 {
 690         struct device_node *np = data;
 691
 692         return dev->of_node == np;
 693 }
 694
 695 static int malidp_platform_probe(struct platform_device *pdev)
 696 {
 697         struct device_node *port;
 698         struct component_match *match = NULL;
 699
 700         if (!pdev->dev.of_node)
 701                 return -ENODEV;
 702
 703         /* there is only one output port inside each device, find it */
 704         port = of_graph_get_remote_node(pdev->dev.of_node, 0, 0);
 705         if (!port)
 706                 return -ENODEV;
 707
 708         drm_of_component_match_add(&pdev->dev, &match, malidp_compare_dev,
 709                                    port);
 710         of_node_put(port);
 711         return component_master_add_with_match(&pdev->dev, &malidp_master_ops,
 712                                                match);
 713 }
 714
 715 static int malidp_platform_remove(struct platform_device *pdev)
 716 {
 717         component_master_del(&pdev->dev, &malidp_master_ops);
 718         return 0;
 719 }
 720
 721 static int __maybe_unused malidp_pm_suspend(struct device *dev)
 722 {
 723         struct drm_device *drm = dev_get_drvdata(dev);
 724
 725         return drm_mode_config_helper_suspend(drm);
 726 }
 727
 728 static int __maybe_unused malidp_pm_resume(struct device *dev)
 729 {
 730         struct drm_device *drm = dev_get_drvdata(dev);
 731
 732         drm_mode_config_helper_resume(drm);
 733
 734         return 0;
 735 }
 736
 737 static const struct dev_pm_ops malidp_pm_ops = {
 738         SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \
 739         SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL)
 740 };
 741
 742 static struct platform_driver malidp_platform_driver = {
 743         .probe          = malidp_platform_probe,
 744         .remove         = malidp_platform_remove,
 745         .driver = {
 746                 .name = "mali-dp",
 747                 .pm = &malidp_pm_ops,
 748                 .of_match_table = malidp_drm_of_match,
 749         },
 750 };
 751
 752 module_platform_driver(malidp_platform_driver);
 753
 754 MODULE_AUTHOR("Liviu Dudau <[email protected]>");
 755 MODULE_DESCRIPTION("ARM Mali DP DRM driver");
 756 MODULE_LICENSE("GPL v2");