drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2014 Traphandler
   4  * Copyright (C) 2014 Free Electrons
   5  * Copyright (C) 2014 Atmel
   6  *
   7  * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
   8  * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
   9  */
  10
  11 #include <linux/clk.h>
  12 #include <linux/irq.h>
  13 #include <linux/irqchip.h>
  14 #include <linux/mfd/atmel-hlcdc.h>
  15 #include <linux/module.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/platform_device.h>
  18
  19 #include <drm/drm_atomic.h>
  20 #include <drm/drm_atomic_helper.h>
  21 #include <drm/drm_drv.h>
  22 #include <drm/drm_fb_helper.h>
  23 #include <drm/drm_gem_cma_helper.h>
  24 #include <drm/drm_gem_framebuffer_helper.h>
  25 #include <drm/drm_irq.h>
  26 #include <drm/drm_probe_helper.h>
  27 #include <drm/drm_vblank.h>
  28
  29 #include "atmel_hlcdc_dc.h"
  30
  31 #define ATMEL_HLCDC_LAYER_IRQS_OFFSET           8
  32
  33 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9n12_layers[] = {
  34         {
  35                 .name = "base",
  36                 .formats = &atmel_hlcdc_plane_rgb_formats,
  37                 .regs_offset = 0x40,
  38                 .id = 0,
  39                 .type = ATMEL_HLCDC_BASE_LAYER,
  40                 .cfgs_offset = 0x2c,
  41                 .layout = {
  42                         .xstride = { 2 },
  43                         .default_color = 3,
  44                         .general_config = 4,
  45                 },
  46                 .clut_offset = 0x400,
  47         },
  48 };
  49
  50 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9n12 = {
  51         .min_width = 0,
  52         .min_height = 0,
  53         .max_width = 1280,
  54         .max_height = 860,
  55         .max_spw = 0x3f,
  56         .max_vpw = 0x3f,
  57         .max_hpw = 0xff,
  58         .conflicting_output_formats = true,
  59         .nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9n12_layers),
  60         .layers = atmel_hlcdc_at91sam9n12_layers,
  61 };
  62
  63 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9x5_layers[] = {
  64         {
  65                 .name = "base",
  66                 .formats = &atmel_hlcdc_plane_rgb_formats,
  67                 .regs_offset = 0x40,
  68                 .id = 0,
  69                 .type = ATMEL_HLCDC_BASE_LAYER,
  70                 .cfgs_offset = 0x2c,
  71                 .layout = {
  72                         .xstride = { 2 },
  73                         .default_color = 3,
  74                         .general_config = 4,
  75                         .disc_pos = 5,
  76                         .disc_size = 6,
  77                 },
  78                 .clut_offset = 0x400,
  79         },
  80         {
  81                 .name = "overlay1",
  82                 .formats = &atmel_hlcdc_plane_rgb_formats,
  83                 .regs_offset = 0x100,
  84                 .id = 1,
  85                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
  86                 .cfgs_offset = 0x2c,
  87                 .layout = {
  88                         .pos = 2,
  89                         .size = 3,
  90                         .xstride = { 4 },
  91                         .pstride = { 5 },
  92                         .default_color = 6,
  93                         .chroma_key = 7,
  94                         .chroma_key_mask = 8,
  95                         .general_config = 9,
  96                 },
  97                 .clut_offset = 0x800,
  98         },
  99         {
 100                 .name = "high-end-overlay",
 101                 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
 102                 .regs_offset = 0x280,
 103                 .id = 2,
 104                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 105                 .cfgs_offset = 0x4c,
 106                 .layout = {
 107                         .pos = 2,
 108                         .size = 3,
 109                         .memsize = 4,
 110                         .xstride = { 5, 7 },
 111                         .pstride = { 6, 8 },
 112                         .default_color = 9,
 113                         .chroma_key = 10,
 114                         .chroma_key_mask = 11,
 115                         .general_config = 12,
 116                         .scaler_config = 13,
 117                         .csc = 14,
 118                 },
 119                 .clut_offset = 0x1000,
 120         },
 121         {
 122                 .name = "cursor",
 123                 .formats = &atmel_hlcdc_plane_rgb_formats,
 124                 .regs_offset = 0x340,
 125                 .id = 3,
 126                 .type = ATMEL_HLCDC_CURSOR_LAYER,
 127                 .max_width = 128,
 128                 .max_height = 128,
 129                 .cfgs_offset = 0x2c,
 130                 .layout = {
 131                         .pos = 2,
 132                         .size = 3,
 133                         .xstride = { 4 },
 134                         .default_color = 6,
 135                         .chroma_key = 7,
 136                         .chroma_key_mask = 8,
 137                         .general_config = 9,
 138                 },
 139                 .clut_offset = 0x1400,
 140         },
 141 };
 142
 143 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9x5 = {
 144         .min_width = 0,
 145         .min_height = 0,
 146         .max_width = 800,
 147         .max_height = 600,
 148         .max_spw = 0x3f,
 149         .max_vpw = 0x3f,
 150         .max_hpw = 0xff,
 151         .conflicting_output_formats = true,
 152         .nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9x5_layers),
 153         .layers = atmel_hlcdc_at91sam9x5_layers,
 154 };
 155
 156 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d3_layers[] = {
 157         {
 158                 .name = "base",
 159                 .formats = &atmel_hlcdc_plane_rgb_formats,
 160                 .regs_offset = 0x40,
 161                 .id = 0,
 162                 .type = ATMEL_HLCDC_BASE_LAYER,
 163                 .cfgs_offset = 0x2c,
 164                 .layout = {
 165                         .xstride = { 2 },
 166                         .default_color = 3,
 167                         .general_config = 4,
 168                         .disc_pos = 5,
 169                         .disc_size = 6,
 170                 },
 171                 .clut_offset = 0x600,
 172         },
 173         {
 174                 .name = "overlay1",
 175                 .formats = &atmel_hlcdc_plane_rgb_formats,
 176                 .regs_offset = 0x140,
 177                 .id = 1,
 178                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 179                 .cfgs_offset = 0x2c,
 180                 .layout = {
 181                         .pos = 2,
 182                         .size = 3,
 183                         .xstride = { 4 },
 184                         .pstride = { 5 },
 185                         .default_color = 6,
 186                         .chroma_key = 7,
 187                         .chroma_key_mask = 8,
 188                         .general_config = 9,
 189                 },
 190                 .clut_offset = 0xa00,
 191         },
 192         {
 193                 .name = "overlay2",
 194                 .formats = &atmel_hlcdc_plane_rgb_formats,
 195                 .regs_offset = 0x240,
 196                 .id = 2,
 197                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 198                 .cfgs_offset = 0x2c,
 199                 .layout = {
 200                         .pos = 2,
 201                         .size = 3,
 202                         .xstride = { 4 },
 203                         .pstride = { 5 },
 204                         .default_color = 6,
 205                         .chroma_key = 7,
 206                         .chroma_key_mask = 8,
 207                         .general_config = 9,
 208                 },
 209                 .clut_offset = 0xe00,
 210         },
 211         {
 212                 .name = "high-end-overlay",
 213                 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
 214                 .regs_offset = 0x340,
 215                 .id = 3,
 216                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 217                 .cfgs_offset = 0x4c,
 218                 .layout = {
 219                         .pos = 2,
 220                         .size = 3,
 221                         .memsize = 4,
 222                         .xstride = { 5, 7 },
 223                         .pstride = { 6, 8 },
 224                         .default_color = 9,
 225                         .chroma_key = 10,
 226                         .chroma_key_mask = 11,
 227                         .general_config = 12,
 228                         .scaler_config = 13,
 229                         .phicoeffs = {
 230                                 .x = 17,
 231                                 .y = 33,
 232                         },
 233                         .csc = 14,
 234                 },
 235                 .clut_offset = 0x1200,
 236         },
 237         {
 238                 .name = "cursor",
 239                 .formats = &atmel_hlcdc_plane_rgb_formats,
 240                 .regs_offset = 0x440,
 241                 .id = 4,
 242                 .type = ATMEL_HLCDC_CURSOR_LAYER,
 243                 .max_width = 128,
 244                 .max_height = 128,
 245                 .cfgs_offset = 0x2c,
 246                 .layout = {
 247                         .pos = 2,
 248                         .size = 3,
 249                         .xstride = { 4 },
 250                         .pstride = { 5 },
 251                         .default_color = 6,
 252                         .chroma_key = 7,
 253                         .chroma_key_mask = 8,
 254                         .general_config = 9,
 255                         .scaler_config = 13,
 256                 },
 257                 .clut_offset = 0x1600,
 258         },
 259 };
 260
 261 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
 262         .min_width = 0,
 263         .min_height = 0,
 264         .max_width = 2048,
 265         .max_height = 2048,
 266         .max_spw = 0x3f,
 267         .max_vpw = 0x3f,
 268         .max_hpw = 0x1ff,
 269         .conflicting_output_formats = true,
 270         .nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
 271         .layers = atmel_hlcdc_sama5d3_layers,
 272 };
 273
 274 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d4_layers[] = {
 275         {
 276                 .name = "base",
 277                 .formats = &atmel_hlcdc_plane_rgb_formats,
 278                 .regs_offset = 0x40,
 279                 .id = 0,
 280                 .type = ATMEL_HLCDC_BASE_LAYER,
 281                 .cfgs_offset = 0x2c,
 282                 .layout = {
 283                         .xstride = { 2 },
 284                         .default_color = 3,
 285                         .general_config = 4,
 286                         .disc_pos = 5,
 287                         .disc_size = 6,
 288                 },
 289                 .clut_offset = 0x600,
 290         },
 291         {
 292                 .name = "overlay1",
 293                 .formats = &atmel_hlcdc_plane_rgb_formats,
 294                 .regs_offset = 0x140,
 295                 .id = 1,
 296                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 297                 .cfgs_offset = 0x2c,
 298                 .layout = {
 299                         .pos = 2,
 300                         .size = 3,
 301                         .xstride = { 4 },
 302                         .pstride = { 5 },
 303                         .default_color = 6,
 304                         .chroma_key = 7,
 305                         .chroma_key_mask = 8,
 306                         .general_config = 9,
 307                 },
 308                 .clut_offset = 0xa00,
 309         },
 310         {
 311                 .name = "overlay2",
 312                 .formats = &atmel_hlcdc_plane_rgb_formats,
 313                 .regs_offset = 0x240,
 314                 .id = 2,
 315                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 316                 .cfgs_offset = 0x2c,
 317                 .layout = {
 318                         .pos = 2,
 319                         .size = 3,
 320                         .xstride = { 4 },
 321                         .pstride = { 5 },
 322                         .default_color = 6,
 323                         .chroma_key = 7,
 324                         .chroma_key_mask = 8,
 325                         .general_config = 9,
 326                 },
 327                 .clut_offset = 0xe00,
 328         },
 329         {
 330                 .name = "high-end-overlay",
 331                 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
 332                 .regs_offset = 0x340,
 333                 .id = 3,
 334                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 335                 .cfgs_offset = 0x4c,
 336                 .layout = {
 337                         .pos = 2,
 338                         .size = 3,
 339                         .memsize = 4,
 340                         .xstride = { 5, 7 },
 341                         .pstride = { 6, 8 },
 342                         .default_color = 9,
 343                         .chroma_key = 10,
 344                         .chroma_key_mask = 11,
 345                         .general_config = 12,
 346                         .scaler_config = 13,
 347                         .phicoeffs = {
 348                                 .x = 17,
 349                                 .y = 33,
 350                         },
 351                         .csc = 14,
 352                 },
 353                 .clut_offset = 0x1200,
 354         },
 355 };
 356
 357 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d4 = {
 358         .min_width = 0,
 359         .min_height = 0,
 360         .max_width = 2048,
 361         .max_height = 2048,
 362         .max_spw = 0xff,
 363         .max_vpw = 0xff,
 364         .max_hpw = 0x3ff,
 365         .nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d4_layers),
 366         .layers = atmel_hlcdc_sama5d4_layers,
 367 };
 368
 369 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sam9x60_layers[] = {
 370         {
 371                 .name = "base",
 372                 .formats = &atmel_hlcdc_plane_rgb_formats,
 373                 .regs_offset = 0x60,
 374                 .id = 0,
 375                 .type = ATMEL_HLCDC_BASE_LAYER,
 376                 .cfgs_offset = 0x2c,
 377                 .layout = {
 378                         .xstride = { 2 },
 379                         .default_color = 3,
 380                         .general_config = 4,
 381                         .disc_pos = 5,
 382                         .disc_size = 6,
 383                 },
 384                 .clut_offset = 0x600,
 385         },
 386         {
 387                 .name = "overlay1",
 388                 .formats = &atmel_hlcdc_plane_rgb_formats,
 389                 .regs_offset = 0x160,
 390                 .id = 1,
 391                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 392                 .cfgs_offset = 0x2c,
 393                 .layout = {
 394                         .pos = 2,
 395                         .size = 3,
 396                         .xstride = { 4 },
 397                         .pstride = { 5 },
 398                         .default_color = 6,
 399                         .chroma_key = 7,
 400                         .chroma_key_mask = 8,
 401                         .general_config = 9,
 402                 },
 403                 .clut_offset = 0xa00,
 404         },
 405         {
 406                 .name = "overlay2",
 407                 .formats = &atmel_hlcdc_plane_rgb_formats,
 408                 .regs_offset = 0x260,
 409                 .id = 2,
 410                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 411                 .cfgs_offset = 0x2c,
 412                 .layout = {
 413                         .pos = 2,
 414                         .size = 3,
 415                         .xstride = { 4 },
 416                         .pstride = { 5 },
 417                         .default_color = 6,
 418                         .chroma_key = 7,
 419                         .chroma_key_mask = 8,
 420                         .general_config = 9,
 421                 },
 422                 .clut_offset = 0xe00,
 423         },
 424         {
 425                 .name = "high-end-overlay",
 426                 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
 427                 .regs_offset = 0x360,
 428                 .id = 3,
 429                 .type = ATMEL_HLCDC_OVERLAY_LAYER,
 430                 .cfgs_offset = 0x4c,
 431                 .layout = {
 432                         .pos = 2,
 433                         .size = 3,
 434                         .memsize = 4,
 435                         .xstride = { 5, 7 },
 436                         .pstride = { 6, 8 },
 437                         .default_color = 9,
 438                         .chroma_key = 10,
 439                         .chroma_key_mask = 11,
 440                         .general_config = 12,
 441                         .scaler_config = 13,
 442                         .phicoeffs = {
 443                                 .x = 17,
 444                                 .y = 33,
 445                         },
 446                         .csc = 14,
 447                 },
 448                 .clut_offset = 0x1200,
 449         },
 450 };
 451
 452 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sam9x60 = {
 453         .min_width = 0,
 454         .min_height = 0,
 455         .max_width = 2048,
 456         .max_height = 2048,
 457         .max_spw = 0xff,
 458         .max_vpw = 0xff,
 459         .max_hpw = 0x3ff,
 460         .fixed_clksrc = true,
 461         .nlayers = ARRAY_SIZE(atmel_hlcdc_sam9x60_layers),
 462         .layers = atmel_hlcdc_sam9x60_layers,
 463 };
 464
 465 static const struct of_device_id atmel_hlcdc_of_match[] = {
 466         {
 467                 .compatible = "atmel,at91sam9n12-hlcdc",
 468                 .data = &atmel_hlcdc_dc_at91sam9n12,
 469         },
 470         {
 471                 .compatible = "atmel,at91sam9x5-hlcdc",
 472                 .data = &atmel_hlcdc_dc_at91sam9x5,
 473         },
 474         {
 475                 .compatible = "atmel,sama5d2-hlcdc",
 476                 .data = &atmel_hlcdc_dc_sama5d4,
 477         },
 478         {
 479                 .compatible = "atmel,sama5d3-hlcdc",
 480                 .data = &atmel_hlcdc_dc_sama5d3,
 481         },
 482         {
 483                 .compatible = "atmel,sama5d4-hlcdc",
 484                 .data = &atmel_hlcdc_dc_sama5d4,
 485         },
 486         {
 487                 .compatible = "microchip,sam9x60-hlcdc",
 488                 .data = &atmel_hlcdc_dc_sam9x60,
 489         },
 490         { /* sentinel */ },
 491 };
 492 MODULE_DEVICE_TABLE(of, atmel_hlcdc_of_match);
 493
 494 enum drm_mode_status
 495 atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
 496                           const struct drm_display_mode *mode)
 497 {
 498         int vfront_porch = mode->vsync_start - mode->vdisplay;
 499         int vback_porch = mode->vtotal - mode->vsync_end;
 500         int vsync_len = mode->vsync_end - mode->vsync_start;
 501         int hfront_porch = mode->hsync_start - mode->hdisplay;
 502         int hback_porch = mode->htotal - mode->hsync_end;
 503         int hsync_len = mode->hsync_end - mode->hsync_start;
 504
 505         if (hsync_len > dc->desc->max_spw + 1 || hsync_len < 1)
 506                 return MODE_HSYNC;
 507
 508         if (vsync_len > dc->desc->max_spw + 1 || vsync_len < 1)
 509                 return MODE_VSYNC;
 510
 511         if (hfront_porch > dc->desc->max_hpw + 1 || hfront_porch < 1 ||
 512             hback_porch > dc->desc->max_hpw + 1 || hback_porch < 1 ||
 513             mode->hdisplay < 1)
 514                 return MODE_H_ILLEGAL;
 515
 516         if (vfront_porch > dc->desc->max_vpw + 1 || vfront_porch < 1 ||
 517             vback_porch > dc->desc->max_vpw || vback_porch < 0 ||
 518             mode->vdisplay < 1)
 519                 return MODE_V_ILLEGAL;
 520
 521         return MODE_OK;
 522 }
 523
 524 static void atmel_hlcdc_layer_irq(struct atmel_hlcdc_layer *layer)
 525 {
 526         if (!layer)
 527                 return;
 528
 529         if (layer->desc->type == ATMEL_HLCDC_BASE_LAYER ||
 530             layer->desc->type == ATMEL_HLCDC_OVERLAY_LAYER ||
 531             layer->desc->type == ATMEL_HLCDC_CURSOR_LAYER)
 532                 atmel_hlcdc_plane_irq(atmel_hlcdc_layer_to_plane(layer));
 533 }
 534
 535 static irqreturn_t atmel_hlcdc_dc_irq_handler(int irq, void *data)
 536 {
 537         struct drm_device *dev = data;
 538         struct atmel_hlcdc_dc *dc = dev->dev_private;
 539         unsigned long status;
 540         unsigned int imr, isr;
 541         int i;
 542
 543         regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_IMR, &imr);
 544         regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
 545         status = imr & isr;
 546         if (!status)
 547                 return IRQ_NONE;
 548
 549         if (status & ATMEL_HLCDC_SOF)
 550                 atmel_hlcdc_crtc_irq(dc->crtc);
 551
 552         for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
 553                 if (ATMEL_HLCDC_LAYER_STATUS(i) & status)
 554                         atmel_hlcdc_layer_irq(dc->layers[i]);
 555         }
 556
 557         return IRQ_HANDLED;
 558 }
 559
 560 static const struct drm_mode_config_funcs mode_config_funcs = {
 561         .fb_create = drm_gem_fb_create,
 562         .atomic_check = drm_atomic_helper_check,
 563         .atomic_commit = drm_atomic_helper_commit,
 564 };
 565
 566 static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
 567 {
 568         struct atmel_hlcdc_dc *dc = dev->dev_private;
 569         int ret;
 570
 571         drm_mode_config_init(dev);
 572
 573         ret = atmel_hlcdc_create_outputs(dev);
 574         if (ret) {
 575                 dev_err(dev->dev, "failed to create HLCDC outputs: %d\n", ret);
 576                 return ret;
 577         }
 578
 579         ret = atmel_hlcdc_create_planes(dev);
 580         if (ret) {
 581                 dev_err(dev->dev, "failed to create planes: %d\n", ret);
 582                 return ret;
 583         }
 584
 585         ret = atmel_hlcdc_crtc_create(dev);
 586         if (ret) {
 587                 dev_err(dev->dev, "failed to create crtc\n");
 588                 return ret;
 589         }
 590
 591         dev->mode_config.min_width = dc->desc->min_width;
 592         dev->mode_config.min_height = dc->desc->min_height;
 593         dev->mode_config.max_width = dc->desc->max_width;
 594         dev->mode_config.max_height = dc->desc->max_height;
 595         dev->mode_config.funcs = &mode_config_funcs;
 596
 597         return 0;
 598 }
 599
 600 static int atmel_hlcdc_dc_load(struct drm_device *dev)
 601 {
 602         struct platform_device *pdev = to_platform_device(dev->dev);
 603         const struct of_device_id *match;
 604         struct atmel_hlcdc_dc *dc;
 605         int ret;
 606
 607         match = of_match_node(atmel_hlcdc_of_match, dev->dev->parent->of_node);
 608         if (!match) {
 609                 dev_err(&pdev->dev, "invalid compatible string\n");
 610                 return -ENODEV;
 611         }
 612
 613         if (!match->data) {
 614                 dev_err(&pdev->dev, "invalid hlcdc description\n");
 615                 return -EINVAL;
 616         }
 617
 618         dc = devm_kzalloc(dev->dev, sizeof(*dc), GFP_KERNEL);
 619         if (!dc)
 620                 return -ENOMEM;
 621
 622         dc->desc = match->data;
 623         dc->hlcdc = dev_get_drvdata(dev->dev->parent);
 624         dev->dev_private = dc;
 625
 626         ret = clk_prepare_enable(dc->hlcdc->periph_clk);
 627         if (ret) {
 628                 dev_err(dev->dev, "failed to enable periph_clk\n");
 629                 return ret;
 630         }
 631
 632         pm_runtime_enable(dev->dev);
 633
 634         ret = drm_vblank_init(dev, 1);
 635         if (ret < 0) {
 636                 dev_err(dev->dev, "failed to initialize vblank\n");
 637                 goto err_periph_clk_disable;
 638         }
 639
 640         ret = atmel_hlcdc_dc_modeset_init(dev);
 641         if (ret < 0) {
 642                 dev_err(dev->dev, "failed to initialize mode setting\n");
 643                 goto err_periph_clk_disable;
 644         }
 645
 646         drm_mode_config_reset(dev);
 647
 648         pm_runtime_get_sync(dev->dev);
 649         ret = drm_irq_install(dev, dc->hlcdc->irq);
 650         pm_runtime_put_sync(dev->dev);
 651         if (ret < 0) {
 652                 dev_err(dev->dev, "failed to install IRQ handler\n");
 653                 goto err_periph_clk_disable;
 654         }
 655
 656         platform_set_drvdata(pdev, dev);
 657
 658         drm_kms_helper_poll_init(dev);
 659
 660         return 0;
 661
 662 err_periph_clk_disable:
 663         pm_runtime_disable(dev->dev);
 664         clk_disable_unprepare(dc->hlcdc->periph_clk);
 665
 666         return ret;
 667 }
 668
 669 static void atmel_hlcdc_dc_unload(struct drm_device *dev)
 670 {
 671         struct atmel_hlcdc_dc *dc = dev->dev_private;
 672
 673         drm_kms_helper_poll_fini(dev);
 674         drm_atomic_helper_shutdown(dev);
 675         drm_mode_config_cleanup(dev);
 676
 677         pm_runtime_get_sync(dev->dev);
 678         drm_irq_uninstall(dev);
 679         pm_runtime_put_sync(dev->dev);
 680
 681         dev->dev_private = NULL;
 682
 683         pm_runtime_disable(dev->dev);
 684         clk_disable_unprepare(dc->hlcdc->periph_clk);
 685 }
 686
 687 static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
 688 {
 689         struct atmel_hlcdc_dc *dc = dev->dev_private;
 690         unsigned int cfg = 0;
 691         int i;
 692
 693         /* Enable interrupts on activated layers */
 694         for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
 695                 if (dc->layers[i])
 696                         cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
 697         }
 698
 699         regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
 700
 701         return 0;
 702 }
 703
 704 static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
 705 {
 706         struct atmel_hlcdc_dc *dc = dev->dev_private;
 707         unsigned int isr;
 708
 709         regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
 710         regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
 711 }
 712
 713 DEFINE_DRM_GEM_CMA_FOPS(fops);
 714
 715 static const struct drm_driver atmel_hlcdc_dc_driver = {
 716         .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 717         .irq_handler = atmel_hlcdc_dc_irq_handler,
 718         .irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
 719         .irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
 720         .irq_uninstall = atmel_hlcdc_dc_irq_uninstall,
 721         DRM_GEM_CMA_DRIVER_OPS,
 722         .fops = &fops,
 723         .name = "atmel-hlcdc",
 724         .desc = "Atmel HLCD Controller DRM",
 725         .date = "20141504",
 726         .major = 1,
 727         .minor = 0,
 728 };
 729
 730 static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
 731 {
 732         struct drm_device *ddev;
 733         int ret;
 734
 735         ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev);
 736         if (IS_ERR(ddev))
 737                 return PTR_ERR(ddev);
 738
 739         ret = atmel_hlcdc_dc_load(ddev);
 740         if (ret)
 741                 goto err_put;
 742
 743         ret = drm_dev_register(ddev, 0);
 744         if (ret)
 745                 goto err_unload;
 746
 747         drm_fbdev_generic_setup(ddev, 24);
 748
 749         return 0;
 750
 751 err_unload:
 752         atmel_hlcdc_dc_unload(ddev);
 753
 754 err_put:
 755         drm_dev_put(ddev);
 756
 757         return ret;
 758 }
 759
 760 static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev)
 761 {
 762         struct drm_device *ddev = platform_get_drvdata(pdev);
 763
 764         drm_dev_unregister(ddev);
 765         atmel_hlcdc_dc_unload(ddev);
 766         drm_dev_put(ddev);
 767
 768         return 0;
 769 }
 770
 771 #ifdef CONFIG_PM_SLEEP
 772 static int atmel_hlcdc_dc_drm_suspend(struct device *dev)
 773 {
 774         struct drm_device *drm_dev = dev_get_drvdata(dev);
 775         struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
 776         struct regmap *regmap = dc->hlcdc->regmap;
 777         struct drm_atomic_state *state;
 778
 779         state = drm_atomic_helper_suspend(drm_dev);
 780         if (IS_ERR(state))
 781                 return PTR_ERR(state);
 782
 783         dc->suspend.state = state;
 784
 785         regmap_read(regmap, ATMEL_HLCDC_IMR, &dc->suspend.imr);
 786         regmap_write(regmap, ATMEL_HLCDC_IDR, dc->suspend.imr);
 787         clk_disable_unprepare(dc->hlcdc->periph_clk);
 788
 789         return 0;
 790 }
 791
 792 static int atmel_hlcdc_dc_drm_resume(struct device *dev)
 793 {
 794         struct drm_device *drm_dev = dev_get_drvdata(dev);
 795         struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
 796
 797         clk_prepare_enable(dc->hlcdc->periph_clk);
 798         regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, dc->suspend.imr);
 799
 800         return drm_atomic_helper_resume(drm_dev, dc->suspend.state);
 801 }
 802 #endif
 803
 804 static SIMPLE_DEV_PM_OPS(atmel_hlcdc_dc_drm_pm_ops,
 805                 atmel_hlcdc_dc_drm_suspend, atmel_hlcdc_dc_drm_resume);
 806
 807 static const struct of_device_id atmel_hlcdc_dc_of_match[] = {
 808         { .compatible = "atmel,hlcdc-display-controller" },
 809         { },
 810 };
 811
 812 static struct platform_driver atmel_hlcdc_dc_platform_driver = {
 813         .probe  = atmel_hlcdc_dc_drm_probe,
 814         .remove = atmel_hlcdc_dc_drm_remove,
 815         .driver = {
 816                 .name   = "atmel-hlcdc-display-controller",
 817                 .pm     = &atmel_hlcdc_dc_drm_pm_ops,
 818                 .of_match_table = atmel_hlcdc_dc_of_match,
 819         },
 820 };
 821 module_platform_driver(atmel_hlcdc_dc_platform_driver);
 822
 823 MODULE_AUTHOR("Jean-Jacques Hiblot <jjhiblot@traphandler.com>");
 824 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
 825 MODULE_DESCRIPTION("Atmel HLCDC Display Controller DRM Driver");
 826 MODULE_LICENSE("GPL");
 827 MODULE_ALIAS("platform:atmel-hlcdc-dc");