drivers/gpu/drm/exynos/exynos5433_drm_decon.c

   1 /* drivers/gpu/drm/exynos5433_drm_decon.c
   2  *
   3  * Copyright (C) 2015 Samsung Electronics Co.Ltd
   4  * Authors:
   5  *      Joonyoung Shim <[email protected]>
   6  *      Hyungwon Hwang <[email protected]>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundationr
  11  */
  12
  13 #include <linux/platform_device.h>
  14 #include <linux/clk.h>
  15 #include <linux/component.h>
  16 #include <linux/of_device.h>
  17 #include <linux/of_gpio.h>
  18 #include <linux/pm_runtime.h>
  19
  20 #include <video/exynos5433_decon.h>
  21
  22 #include "exynos_drm_drv.h"
  23 #include "exynos_drm_crtc.h"
  24 #include "exynos_drm_fb.h"
  25 #include "exynos_drm_plane.h"
  26 #include "exynos_drm_iommu.h"
  27
  28 #define WINDOWS_NR      3
  29 #define MIN_FB_WIDTH_FOR_16WORD_BURST   128
  30
  31 #define IFTYPE_I80      (1 << 0)
  32 #define I80_HW_TRG      (1 << 1)
  33 #define IFTYPE_HDMI     (1 << 2)
  34
  35 static const char * const decon_clks_name[] = {
  36         "pclk",
  37         "aclk_decon",
  38         "aclk_smmu_decon0x",
  39         "aclk_xiu_decon0x",
  40         "pclk_smmu_decon0x",
  41         "sclk_decon_vclk",
  42         "sclk_decon_eclk",
  43 };
  44
  45 enum decon_flag_bits {
  46         BIT_CLKS_ENABLED,
  47         BIT_IRQS_ENABLED,
  48         BIT_WIN_UPDATED,
  49         BIT_SUSPENDED,
  50         BIT_REQUEST_UPDATE
  51 };
  52
  53 struct decon_context {
  54         struct device                   *dev;
  55         struct drm_device               *drm_dev;
  56         struct exynos_drm_crtc          *crtc;
  57         struct exynos_drm_plane         planes[WINDOWS_NR];
  58         struct exynos_drm_plane_config  configs[WINDOWS_NR];
  59         void __iomem                    *addr;
  60         struct clk                      *clks[ARRAY_SIZE(decon_clks_name)];
  61         int                             pipe;
  62         unsigned long                   flags;
  63         unsigned long                   out_type;
  64         int                             first_win;
  65 };
  66
  67 static const uint32_t decon_formats[] = {
  68         DRM_FORMAT_XRGB1555,
  69         DRM_FORMAT_RGB565,
  70         DRM_FORMAT_XRGB8888,
  71         DRM_FORMAT_ARGB8888,
  72 };
  73
  74 static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
  75         DRM_PLANE_TYPE_PRIMARY,
  76         DRM_PLANE_TYPE_OVERLAY,
  77         DRM_PLANE_TYPE_CURSOR,
  78 };
  79
  80 static inline void decon_set_bits(struct decon_context *ctx, u32 reg, u32 mask,
  81                                   u32 val)
  82 {
  83         val = (val & mask) | (readl(ctx->addr + reg) & ~mask);
  84         writel(val, ctx->addr + reg);
  85 }
  86
  87 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
  88 {
  89         struct decon_context *ctx = crtc->ctx;
  90         u32 val;
  91
  92         if (test_bit(BIT_SUSPENDED, &ctx->flags))
  93                 return -EPERM;
  94
  95         if (!test_and_set_bit(BIT_IRQS_ENABLED, &ctx->flags)) {
  96                 val = VIDINTCON0_INTEN;
  97                 if (ctx->out_type & IFTYPE_I80)
  98                         val |= VIDINTCON0_FRAMEDONE;
  99                 else
 100                         val |= VIDINTCON0_INTFRMEN;
 101
 102                 writel(val, ctx->addr + DECON_VIDINTCON0);
 103         }
 104
 105         return 0;
 106 }
 107
 108 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
 109 {
 110         struct decon_context *ctx = crtc->ctx;
 111
 112         if (test_bit(BIT_SUSPENDED, &ctx->flags))
 113                 return;
 114
 115         if (test_and_clear_bit(BIT_IRQS_ENABLED, &ctx->flags))
 116                 writel(0, ctx->addr + DECON_VIDINTCON0);
 117 }
 118
 119 static void decon_setup_trigger(struct decon_context *ctx)
 120 {
 121         u32 val = !(ctx->out_type & I80_HW_TRG)
 122                 ? TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
 123                   TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN
 124                 : TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
 125                   TRIGCON_HWTRIGMASK | TRIGCON_HWTRIGEN;
 126         writel(val, ctx->addr + DECON_TRIGCON);
 127 }
 128
 129 static void decon_commit(struct exynos_drm_crtc *crtc)
 130 {
 131         struct decon_context *ctx = crtc->ctx;
 132         struct drm_display_mode *m = &crtc->base.mode;
 133         u32 val;
 134
 135         if (test_bit(BIT_SUSPENDED, &ctx->flags))
 136                 return;
 137
 138         if (ctx->out_type & IFTYPE_HDMI) {
 139                 m->crtc_hsync_start = m->crtc_hdisplay + 10;
 140                 m->crtc_hsync_end = m->crtc_htotal - 92;
 141                 m->crtc_vsync_start = m->crtc_vdisplay + 1;
 142                 m->crtc_vsync_end = m->crtc_vsync_start + 1;
 143         }
 144
 145         if (ctx->out_type & (IFTYPE_I80 | I80_HW_TRG))
 146                 decon_setup_trigger(ctx);
 147
 148         /* lcd on and use command if */
 149         val = VIDOUT_LCD_ON;
 150         if (ctx->out_type & IFTYPE_I80) {
 151                 val |= VIDOUT_COMMAND_IF;
 152         } else {
 153                 val |= VIDOUT_RGB_IF;
 154         }
 155
 156         writel(val, ctx->addr + DECON_VIDOUTCON0);
 157
 158         val = VIDTCON2_LINEVAL(m->vdisplay - 1) |
 159                 VIDTCON2_HOZVAL(m->hdisplay - 1);
 160         writel(val, ctx->addr + DECON_VIDTCON2);
 161
 162         if (!(ctx->out_type & IFTYPE_I80)) {
 163                 val = VIDTCON00_VBPD_F(
 164                                 m->crtc_vtotal - m->crtc_vsync_end - 1) |
 165                         VIDTCON00_VFPD_F(
 166                                 m->crtc_vsync_start - m->crtc_vdisplay - 1);
 167                 writel(val, ctx->addr + DECON_VIDTCON00);
 168
 169                 val = VIDTCON01_VSPW_F(
 170                                 m->crtc_vsync_end - m->crtc_vsync_start - 1);
 171                 writel(val, ctx->addr + DECON_VIDTCON01);
 172
 173                 val = VIDTCON10_HBPD_F(
 174                                 m->crtc_htotal - m->crtc_hsync_end - 1) |
 175                         VIDTCON10_HFPD_F(
 176                                 m->crtc_hsync_start - m->crtc_hdisplay - 1);
 177                 writel(val, ctx->addr + DECON_VIDTCON10);
 178
 179                 val = VIDTCON11_HSPW_F(
 180                                 m->crtc_hsync_end - m->crtc_hsync_start - 1);
 181                 writel(val, ctx->addr + DECON_VIDTCON11);
 182         }
 183
 184         /* enable output and display signal */
 185         decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
 186
 187         decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
 188 }
 189
 190 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
 191                                  struct drm_framebuffer *fb)
 192 {
 193         unsigned long val;
 194
 195         val = readl(ctx->addr + DECON_WINCONx(win));
 196         val &= ~WINCONx_BPPMODE_MASK;
 197
 198         switch (fb->pixel_format) {
 199         case DRM_FORMAT_XRGB1555:
 200                 val |= WINCONx_BPPMODE_16BPP_I1555;
 201                 val |= WINCONx_HAWSWP_F;
 202                 val |= WINCONx_BURSTLEN_16WORD;
 203                 break;
 204         case DRM_FORMAT_RGB565:
 205                 val |= WINCONx_BPPMODE_16BPP_565;
 206                 val |= WINCONx_HAWSWP_F;
 207                 val |= WINCONx_BURSTLEN_16WORD;
 208                 break;
 209         case DRM_FORMAT_XRGB8888:
 210                 val |= WINCONx_BPPMODE_24BPP_888;
 211                 val |= WINCONx_WSWP_F;
 212                 val |= WINCONx_BURSTLEN_16WORD;
 213                 break;
 214         case DRM_FORMAT_ARGB8888:
 215                 val |= WINCONx_BPPMODE_32BPP_A8888;
 216                 val |= WINCONx_WSWP_F | WINCONx_BLD_PIX_F | WINCONx_ALPHA_SEL_F;
 217                 val |= WINCONx_BURSTLEN_16WORD;
 218                 break;
 219         default:
 220                 DRM_ERROR("Proper pixel format is not set\n");
 221                 return;
 222         }
 223
 224         DRM_DEBUG_KMS("bpp = %u\n", fb->bits_per_pixel);
 225
 226         /*
 227          * In case of exynos, setting dma-burst to 16Word causes permanent
 228          * tearing for very small buffers, e.g. cursor buffer. Burst Mode
 229          * switching which is based on plane size is not recommended as
 230          * plane size varies a lot towards the end of the screen and rapid
 231          * movement causes unstable DMA which results into iommu crash/tear.
 232          */
 233
 234         if (fb->width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
 235                 val &= ~WINCONx_BURSTLEN_MASK;
 236                 val |= WINCONx_BURSTLEN_8WORD;
 237         }
 238
 239         writel(val, ctx->addr + DECON_WINCONx(win));
 240 }
 241
 242 static void decon_shadow_protect_win(struct decon_context *ctx, int win,
 243                                         bool protect)
 244 {
 245         decon_set_bits(ctx, DECON_SHADOWCON, SHADOWCON_Wx_PROTECT(win),
 246                        protect ? ~0 : 0);
 247 }
 248
 249 static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
 250 {
 251         struct decon_context *ctx = crtc->ctx;
 252         int i;
 253
 254         if (test_bit(BIT_SUSPENDED, &ctx->flags))
 255                 return;
 256
 257         for (i = ctx->first_win; i < WINDOWS_NR; i++)
 258                 decon_shadow_protect_win(ctx, i, true);
 259 }
 260
 261 #define BIT_VAL(x, e, s) (((x) & ((1 << ((e) - (s) + 1)) - 1)) << (s))
 262 #define COORDINATE_X(x) BIT_VAL((x), 23, 12)
 263 #define COORDINATE_Y(x) BIT_VAL((x), 11, 0)
 264
 265 static void decon_update_plane(struct exynos_drm_crtc *crtc,
 266                                struct exynos_drm_plane *plane)
 267 {
 268         struct exynos_drm_plane_state *state =
 269                                 to_exynos_plane_state(plane->base.state);
 270         struct decon_context *ctx = crtc->ctx;
 271         struct drm_framebuffer *fb = state->base.fb;
 272         unsigned int win = plane->index;
 273         unsigned int bpp = fb->bits_per_pixel >> 3;
 274         unsigned int pitch = fb->pitches[0];
 275         dma_addr_t dma_addr = exynos_drm_fb_dma_addr(fb, 0);
 276         u32 val;
 277
 278         if (test_bit(BIT_SUSPENDED, &ctx->flags))
 279                 return;
 280
 281         val = COORDINATE_X(state->crtc.x) | COORDINATE_Y(state->crtc.y);
 282         writel(val, ctx->addr + DECON_VIDOSDxA(win));
 283
 284         val = COORDINATE_X(state->crtc.x + state->crtc.w - 1) |
 285                 COORDINATE_Y(state->crtc.y + state->crtc.h - 1);
 286         writel(val, ctx->addr + DECON_VIDOSDxB(win));
 287
 288         val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
 289                 VIDOSD_Wx_ALPHA_B_F(0x0);
 290         writel(val, ctx->addr + DECON_VIDOSDxC(win));
 291
 292         val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
 293                 VIDOSD_Wx_ALPHA_B_F(0x0);
 294         writel(val, ctx->addr + DECON_VIDOSDxD(win));
 295
 296         writel(dma_addr, ctx->addr + DECON_VIDW0xADD0B0(win));
 297
 298         val = dma_addr + pitch * state->src.h;
 299         writel(val, ctx->addr + DECON_VIDW0xADD1B0(win));
 300
 301         if (!(ctx->out_type & IFTYPE_HDMI))
 302                 val = BIT_VAL(pitch - state->crtc.w * bpp, 27, 14)
 303                         | BIT_VAL(state->crtc.w * bpp, 13, 0);
 304         else
 305                 val = BIT_VAL(pitch - state->crtc.w * bpp, 29, 15)
 306                         | BIT_VAL(state->crtc.w * bpp, 14, 0);
 307         writel(val, ctx->addr + DECON_VIDW0xADD2(win));
 308
 309         decon_win_set_pixfmt(ctx, win, fb);
 310
 311         /* window enable */
 312         decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, ~0);
 313         set_bit(BIT_REQUEST_UPDATE, &ctx->flags);
 314 }
 315
 316 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
 317                                 struct exynos_drm_plane *plane)
 318 {
 319         struct decon_context *ctx = crtc->ctx;
 320         unsigned int win = plane->index;
 321
 322         if (test_bit(BIT_SUSPENDED, &ctx->flags))
 323                 return;
 324
 325         decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
 326         set_bit(BIT_REQUEST_UPDATE, &ctx->flags);
 327 }
 328
 329 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
 330 {
 331         struct decon_context *ctx = crtc->ctx;
 332         int i;
 333
 334         if (test_bit(BIT_SUSPENDED, &ctx->flags))
 335                 return;
 336
 337         for (i = ctx->first_win; i < WINDOWS_NR; i++)
 338                 decon_shadow_protect_win(ctx, i, false);
 339
 340         if (test_and_clear_bit(BIT_REQUEST_UPDATE, &ctx->flags))
 341                 decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
 342
 343         if (ctx->out_type & IFTYPE_I80)
 344                 set_bit(BIT_WIN_UPDATED, &ctx->flags);
 345 }
 346
 347 static void decon_swreset(struct decon_context *ctx)
 348 {
 349         unsigned int tries;
 350
 351         writel(0, ctx->addr + DECON_VIDCON0);
 352         for (tries = 2000; tries; --tries) {
 353                 if (~readl(ctx->addr + DECON_VIDCON0) & VIDCON0_STOP_STATUS)
 354                         break;
 355                 udelay(10);
 356         }
 357
 358         WARN(tries == 0, "failed to disable DECON\n");
 359
 360         writel(VIDCON0_SWRESET, ctx->addr + DECON_VIDCON0);
 361         for (tries = 2000; tries; --tries) {
 362                 if (~readl(ctx->addr + DECON_VIDCON0) & VIDCON0_SWRESET)
 363                         break;
 364                 udelay(10);
 365         }
 366
 367         WARN(tries == 0, "failed to software reset DECON\n");
 368
 369         if (!(ctx->out_type & IFTYPE_HDMI))
 370                 return;
 371
 372         writel(VIDCON0_CLKVALUP | VIDCON0_VLCKFREE, ctx->addr + DECON_VIDCON0);
 373         decon_set_bits(ctx, DECON_CMU,
 374                        CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F, ~0);
 375         writel(VIDCON1_VCLK_RUN_VDEN_DISABLE, ctx->addr + DECON_VIDCON1);
 376         writel(CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F | CRCCTRL_CRCCLKEN,
 377                ctx->addr + DECON_CRCCTRL);
 378 }
 379
 380 static void decon_enable(struct exynos_drm_crtc *crtc)
 381 {
 382         struct decon_context *ctx = crtc->ctx;
 383
 384         if (!test_and_clear_bit(BIT_SUSPENDED, &ctx->flags))
 385                 return;
 386
 387         pm_runtime_get_sync(ctx->dev);
 388
 389         exynos_drm_pipe_clk_enable(crtc, true);
 390
 391         set_bit(BIT_CLKS_ENABLED, &ctx->flags);
 392
 393         decon_swreset(ctx);
 394
 395         /* if vblank was enabled status, enable it again. */
 396         if (test_and_clear_bit(BIT_IRQS_ENABLED, &ctx->flags))
 397                 decon_enable_vblank(ctx->crtc);
 398
 399         decon_commit(ctx->crtc);
 400 }
 401
 402 static void decon_disable(struct exynos_drm_crtc *crtc)
 403 {
 404         struct decon_context *ctx = crtc->ctx;
 405         int i;
 406
 407         if (test_bit(BIT_SUSPENDED, &ctx->flags))
 408                 return;
 409
 410         /*
 411          * We need to make sure that all windows are disabled before we
 412          * suspend that connector. Otherwise we might try to scan from
 413          * a destroyed buffer later.
 414          */
 415         for (i = ctx->first_win; i < WINDOWS_NR; i++)
 416                 decon_disable_plane(crtc, &ctx->planes[i]);
 417
 418         decon_swreset(ctx);
 419
 420         clear_bit(BIT_CLKS_ENABLED, &ctx->flags);
 421
 422         exynos_drm_pipe_clk_enable(crtc, false);
 423
 424         pm_runtime_put_sync(ctx->dev);
 425
 426         set_bit(BIT_SUSPENDED, &ctx->flags);
 427 }
 428
 429 static void decon_te_irq_handler(struct exynos_drm_crtc *crtc)
 430 {
 431         struct decon_context *ctx = crtc->ctx;
 432
 433         if (!test_bit(BIT_CLKS_ENABLED, &ctx->flags) ||
 434             (ctx->out_type & I80_HW_TRG))
 435                 return;
 436
 437         if (test_and_clear_bit(BIT_WIN_UPDATED, &ctx->flags))
 438                 decon_set_bits(ctx, DECON_TRIGCON, TRIGCON_SWTRIGCMD, ~0);
 439 }
 440
 441 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
 442 {
 443         struct decon_context *ctx = crtc->ctx;
 444         int win, i, ret;
 445
 446         DRM_DEBUG_KMS("%s\n", __FILE__);
 447
 448         for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
 449                 ret = clk_prepare_enable(ctx->clks[i]);
 450                 if (ret < 0)
 451                         goto err;
 452         }
 453
 454         for (win = 0; win < WINDOWS_NR; win++) {
 455                 decon_shadow_protect_win(ctx, win, true);
 456                 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
 457                 decon_shadow_protect_win(ctx, win, false);
 458         }
 459
 460         decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
 461
 462         /* TODO: wait for possible vsync */
 463         msleep(50);
 464
 465 err:
 466         while (--i >= 0)
 467                 clk_disable_unprepare(ctx->clks[i]);
 468 }
 469
 470 static struct exynos_drm_crtc_ops decon_crtc_ops = {
 471         .enable                 = decon_enable,
 472         .disable                = decon_disable,
 473         .enable_vblank          = decon_enable_vblank,
 474         .disable_vblank         = decon_disable_vblank,
 475         .atomic_begin           = decon_atomic_begin,
 476         .update_plane           = decon_update_plane,
 477         .disable_plane          = decon_disable_plane,
 478         .atomic_flush           = decon_atomic_flush,
 479         .te_handler             = decon_te_irq_handler,
 480 };
 481
 482 static int decon_bind(struct device *dev, struct device *master, void *data)
 483 {
 484         struct decon_context *ctx = dev_get_drvdata(dev);
 485         struct drm_device *drm_dev = data;
 486         struct exynos_drm_private *priv = drm_dev->dev_private;
 487         struct exynos_drm_plane *exynos_plane;
 488         enum exynos_drm_output_type out_type;
 489         unsigned int win;
 490         int ret;
 491
 492         ctx->drm_dev = drm_dev;
 493         ctx->pipe = priv->pipe++;
 494
 495         for (win = ctx->first_win; win < WINDOWS_NR; win++) {
 496                 int tmp = (win == ctx->first_win) ? 0 : win;
 497
 498                 ctx->configs[win].pixel_formats = decon_formats;
 499                 ctx->configs[win].num_pixel_formats = ARRAY_SIZE(decon_formats);
 500                 ctx->configs[win].zpos = win;
 501                 ctx->configs[win].type = decon_win_types[tmp];
 502
 503                 ret = exynos_plane_init(drm_dev, &ctx->planes[win], win,
 504                                         1 << ctx->pipe, &ctx->configs[win]);
 505                 if (ret)
 506                         return ret;
 507         }
 508
 509         exynos_plane = &ctx->planes[ctx->first_win];
 510         out_type = (ctx->out_type & IFTYPE_HDMI) ? EXYNOS_DISPLAY_TYPE_HDMI
 511                                                   : EXYNOS_DISPLAY_TYPE_LCD;
 512         ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
 513                                         ctx->pipe, out_type,
 514                                         &decon_crtc_ops, ctx);
 515         if (IS_ERR(ctx->crtc)) {
 516                 ret = PTR_ERR(ctx->crtc);
 517                 goto err;
 518         }
 519
 520         decon_clear_channels(ctx->crtc);
 521
 522         ret = drm_iommu_attach_device(drm_dev, dev);
 523         if (ret)
 524                 goto err;
 525
 526         return ret;
 527 err:
 528         priv->pipe--;
 529         return ret;
 530 }
 531
 532 static void decon_unbind(struct device *dev, struct device *master, void *data)
 533 {
 534         struct decon_context *ctx = dev_get_drvdata(dev);
 535
 536         decon_disable(ctx->crtc);
 537
 538         /* detach this sub driver from iommu mapping if supported. */
 539         drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
 540 }
 541
 542 static const struct component_ops decon_component_ops = {
 543         .bind   = decon_bind,
 544         .unbind = decon_unbind,
 545 };
 546
 547 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
 548 {
 549         struct decon_context *ctx = dev_id;
 550         u32 val;
 551
 552         if (!test_bit(BIT_CLKS_ENABLED, &ctx->flags))
 553                 goto out;
 554
 555         val = readl(ctx->addr + DECON_VIDINTCON1);
 556         val &= VIDINTCON1_INTFRMDONEPEND | VIDINTCON1_INTFRMPEND;
 557
 558         if (val) {
 559                 writel(val, ctx->addr + DECON_VIDINTCON1);
 560                 drm_crtc_handle_vblank(&ctx->crtc->base);
 561         }
 562
 563 out:
 564         return IRQ_HANDLED;
 565 }
 566
 567 #ifdef CONFIG_PM
 568 static int exynos5433_decon_suspend(struct device *dev)
 569 {
 570         struct decon_context *ctx = dev_get_drvdata(dev);
 571         int i = ARRAY_SIZE(decon_clks_name);
 572
 573         while (--i >= 0)
 574                 clk_disable_unprepare(ctx->clks[i]);
 575
 576         return 0;
 577 }
 578
 579 static int exynos5433_decon_resume(struct device *dev)
 580 {
 581         struct decon_context *ctx = dev_get_drvdata(dev);
 582         int i, ret;
 583
 584         for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
 585                 ret = clk_prepare_enable(ctx->clks[i]);
 586                 if (ret < 0)
 587                         goto err;
 588         }
 589
 590         return 0;
 591
 592 err:
 593         while (--i >= 0)
 594                 clk_disable_unprepare(ctx->clks[i]);
 595
 596         return ret;
 597 }
 598 #endif
 599
 600 static const struct dev_pm_ops exynos5433_decon_pm_ops = {
 601         SET_RUNTIME_PM_OPS(exynos5433_decon_suspend, exynos5433_decon_resume,
 602                            NULL)
 603 };
 604
 605 static const struct of_device_id exynos5433_decon_driver_dt_match[] = {
 606         {
 607                 .compatible = "samsung,exynos5433-decon",
 608                 .data = (void *)I80_HW_TRG
 609         },
 610         {
 611                 .compatible = "samsung,exynos5433-decon-tv",
 612                 .data = (void *)(I80_HW_TRG | IFTYPE_HDMI)
 613         },
 614         {},
 615 };
 616 MODULE_DEVICE_TABLE(of, exynos5433_decon_driver_dt_match);
 617
 618 static int exynos5433_decon_probe(struct platform_device *pdev)
 619 {
 620         struct device *dev = &pdev->dev;
 621         struct decon_context *ctx;
 622         struct resource *res;
 623         int ret;
 624         int i;
 625
 626         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 627         if (!ctx)
 628                 return -ENOMEM;
 629
 630         __set_bit(BIT_SUSPENDED, &ctx->flags);
 631         ctx->dev = dev;
 632         ctx->out_type = (unsigned long)of_device_get_match_data(dev);
 633
 634         if (ctx->out_type & IFTYPE_HDMI) {
 635                 ctx->first_win = 1;
 636         } else if (of_get_child_by_name(dev->of_node, "i80-if-timings")) {
 637                 ctx->out_type |= IFTYPE_I80;
 638         }
 639
 640         for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
 641                 struct clk *clk;
 642
 643                 clk = devm_clk_get(ctx->dev, decon_clks_name[i]);
 644                 if (IS_ERR(clk))
 645                         return PTR_ERR(clk);
 646
 647                 ctx->clks[i] = clk;
 648         }
 649
 650         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 651         if (!res) {
 652                 dev_err(dev, "cannot find IO resource\n");
 653                 return -ENXIO;
 654         }
 655
 656         ctx->addr = devm_ioremap_resource(dev, res);
 657         if (IS_ERR(ctx->addr)) {
 658                 dev_err(dev, "ioremap failed\n");
 659                 return PTR_ERR(ctx->addr);
 660         }
 661
 662         res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
 663                         (ctx->out_type & IFTYPE_I80) ? "lcd_sys" : "vsync");
 664         if (!res) {
 665                 dev_err(dev, "cannot find IRQ resource\n");
 666                 return -ENXIO;
 667         }
 668
 669         ret = devm_request_irq(dev, res->start, decon_irq_handler, 0,
 670                                "drm_decon", ctx);
 671         if (ret < 0) {
 672                 dev_err(dev, "lcd_sys irq request failed\n");
 673                 return ret;
 674         }
 675
 676         platform_set_drvdata(pdev, ctx);
 677
 678         pm_runtime_enable(dev);
 679
 680         ret = component_add(dev, &decon_component_ops);
 681         if (ret)
 682                 goto err_disable_pm_runtime;
 683
 684         return 0;
 685
 686 err_disable_pm_runtime:
 687         pm_runtime_disable(dev);
 688
 689         return ret;
 690 }
 691
 692 static int exynos5433_decon_remove(struct platform_device *pdev)
 693 {
 694         pm_runtime_disable(&pdev->dev);
 695
 696         component_del(&pdev->dev, &decon_component_ops);
 697
 698         return 0;
 699 }
 700
 701 struct platform_driver exynos5433_decon_driver = {
 702         .probe          = exynos5433_decon_probe,
 703         .remove         = exynos5433_decon_remove,
 704         .driver         = {
 705                 .name   = "exynos5433-decon",
 706                 .pm     = &exynos5433_decon_pm_ops,
 707                 .of_match_table = exynos5433_decon_driver_dt_match,
 708         },
 709 };