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 <jy0922.shim@samsung.com>
   6  *      Hyungwon Hwang <human.hwang@samsung.com>
   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/iopoll.h>
  17 #include <linux/mfd/syscon.h>
  18 #include <linux/of_device.h>
  19 #include <linux/of_gpio.h>
  20 #include <linux/pm_runtime.h>
  21 #include <linux/regmap.h>
  22
  23 #include <video/exynos5433_decon.h>
  24
  25 #include "exynos_drm_drv.h"
  26 #include "exynos_drm_crtc.h"
  27 #include "exynos_drm_fb.h"
  28 #include "exynos_drm_plane.h"
  29 #include "exynos_drm_iommu.h"
  30
  31 #define DSD_CFG_MUX 0x1004
  32 #define DSD_CFG_MUX_TE_UNMASK_GLOBAL BIT(13)
  33
  34 #define WINDOWS_NR      3
  35 #define MIN_FB_WIDTH_FOR_16WORD_BURST   128
  36
  37 #define I80_HW_TRG      (1 << 0)
  38 #define IFTYPE_HDMI     (1 << 1)
  39
  40 static const char * const decon_clks_name[] = {
  41         "pclk",
  42         "aclk_decon",
  43         "aclk_smmu_decon0x",
  44         "aclk_xiu_decon0x",
  45         "pclk_smmu_decon0x",
  46         "sclk_decon_vclk",
  47         "sclk_decon_eclk",
  48 };
  49
  50 struct decon_context {
  51         struct device                   *dev;
  52         struct drm_device               *drm_dev;
  53         struct exynos_drm_crtc          *crtc;
  54         struct exynos_drm_plane         planes[WINDOWS_NR];
  55         struct exynos_drm_plane_config  configs[WINDOWS_NR];
  56         void __iomem                    *addr;
  57         struct regmap                   *sysreg;
  58         struct clk                      *clks[ARRAY_SIZE(decon_clks_name)];
  59         unsigned int                    irq;
  60         unsigned int                    irq_vsync;
  61         unsigned int                    irq_lcd_sys;
  62         unsigned int                    te_irq;
  63         unsigned long                   out_type;
  64         int                             first_win;
  65         spinlock_t                      vblank_lock;
  66         u32                             frame_id;
  67 };
  68
  69 static const uint32_t decon_formats[] = {
  70         DRM_FORMAT_XRGB1555,
  71         DRM_FORMAT_RGB565,
  72         DRM_FORMAT_XRGB8888,
  73         DRM_FORMAT_ARGB8888,
  74 };
  75
  76 static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
  77         DRM_PLANE_TYPE_PRIMARY,
  78         DRM_PLANE_TYPE_OVERLAY,
  79         DRM_PLANE_TYPE_CURSOR,
  80 };
  81
  82 static inline void decon_set_bits(struct decon_context *ctx, u32 reg, u32 mask,
  83                                   u32 val)
  84 {
  85         val = (val & mask) | (readl(ctx->addr + reg) & ~mask);
  86         writel(val, ctx->addr + reg);
  87 }
  88
  89 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
  90 {
  91         struct decon_context *ctx = crtc->ctx;
  92         u32 val;
  93
  94         val = VIDINTCON0_INTEN;
  95         if (crtc->i80_mode)
  96                 val |= VIDINTCON0_FRAMEDONE;
  97         else
  98                 val |= VIDINTCON0_INTFRMEN | VIDINTCON0_FRAMESEL_FP;
  99
 100         writel(val, ctx->addr + DECON_VIDINTCON0);
 101
 102         enable_irq(ctx->irq);
 103         if (!(ctx->out_type & I80_HW_TRG))
 104                 enable_irq(ctx->te_irq);
 105
 106         return 0;
 107 }
 108
 109 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
 110 {
 111         struct decon_context *ctx = crtc->ctx;
 112
 113         if (!(ctx->out_type & I80_HW_TRG))
 114                 disable_irq_nosync(ctx->te_irq);
 115         disable_irq_nosync(ctx->irq);
 116
 117         writel(0, ctx->addr + DECON_VIDINTCON0);
 118 }
 119
 120 /* return number of starts/ends of frame transmissions since reset */
 121 static u32 decon_get_frame_count(struct decon_context *ctx, bool end)
 122 {
 123         u32 frm, pfrm, status, cnt = 2;
 124
 125         /* To get consistent result repeat read until frame id is stable.
 126          * Usually the loop will be executed once, in rare cases when the loop
 127          * is executed at frame change time 2nd pass will be needed.
 128          */
 129         frm = readl(ctx->addr + DECON_CRFMID);
 130         do {
 131                 status = readl(ctx->addr + DECON_VIDCON1);
 132                 pfrm = frm;
 133                 frm = readl(ctx->addr + DECON_CRFMID);
 134         } while (frm != pfrm && --cnt);
 135
 136         /* CRFMID is incremented on BPORCH in case of I80 and on VSYNC in case
 137          * of RGB, it should be taken into account.
 138          */
 139         if (!frm)
 140                 return 0;
 141
 142         switch (status & (VIDCON1_VSTATUS_MASK | VIDCON1_I80_ACTIVE)) {
 143         case VIDCON1_VSTATUS_VS:
 144                 if (!(ctx->crtc->i80_mode))
 145                         --frm;
 146                 break;
 147         case VIDCON1_VSTATUS_BP:
 148                 --frm;
 149                 break;
 150         case VIDCON1_I80_ACTIVE:
 151         case VIDCON1_VSTATUS_AC:
 152                 if (end)
 153                         --frm;
 154                 break;
 155         default:
 156                 break;
 157         }
 158
 159         return frm;
 160 }
 161
 162 static u32 decon_get_vblank_counter(struct exynos_drm_crtc *crtc)
 163 {
 164         struct decon_context *ctx = crtc->ctx;
 165
 166         return decon_get_frame_count(ctx, false);
 167 }
 168
 169 static void decon_setup_trigger(struct decon_context *ctx)
 170 {
 171         if (!ctx->crtc->i80_mode && !(ctx->out_type & I80_HW_TRG))
 172                 return;
 173
 174         if (!(ctx->out_type & I80_HW_TRG)) {
 175                 writel(TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
 176                        TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN,
 177                        ctx->addr + DECON_TRIGCON);
 178                 return;
 179         }
 180
 181         writel(TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F | TRIGCON_HWTRIGMASK
 182                | TRIGCON_HWTRIGEN, ctx->addr + DECON_TRIGCON);
 183
 184         if (regmap_update_bits(ctx->sysreg, DSD_CFG_MUX,
 185                                DSD_CFG_MUX_TE_UNMASK_GLOBAL, ~0))
 186                 DRM_ERROR("Cannot update sysreg.\n");
 187 }
 188
 189 static void decon_commit(struct exynos_drm_crtc *crtc)
 190 {
 191         struct decon_context *ctx = crtc->ctx;
 192         struct drm_display_mode *m = &crtc->base.mode;
 193         bool interlaced = false;
 194         u32 val;
 195
 196         if (ctx->out_type & IFTYPE_HDMI) {
 197                 m->crtc_hsync_start = m->crtc_hdisplay + 10;
 198                 m->crtc_hsync_end = m->crtc_htotal - 92;
 199                 m->crtc_vsync_start = m->crtc_vdisplay + 1;
 200                 m->crtc_vsync_end = m->crtc_vsync_start + 1;
 201                 if (m->flags & DRM_MODE_FLAG_INTERLACE)
 202                         interlaced = true;
 203         }
 204
 205         decon_setup_trigger(ctx);
 206
 207         /* lcd on and use command if */
 208         val = VIDOUT_LCD_ON;
 209         if (interlaced)
 210                 val |= VIDOUT_INTERLACE_EN_F;
 211         if (crtc->i80_mode) {
 212                 val |= VIDOUT_COMMAND_IF;
 213         } else {
 214                 val |= VIDOUT_RGB_IF;
 215         }
 216
 217         writel(val, ctx->addr + DECON_VIDOUTCON0);
 218
 219         if (interlaced)
 220                 val = VIDTCON2_LINEVAL(m->vdisplay / 2 - 1) |
 221                         VIDTCON2_HOZVAL(m->hdisplay - 1);
 222         else
 223                 val = VIDTCON2_LINEVAL(m->vdisplay - 1) |
 224                         VIDTCON2_HOZVAL(m->hdisplay - 1);
 225         writel(val, ctx->addr + DECON_VIDTCON2);
 226
 227         if (!crtc->i80_mode) {
 228                 int vbp = m->crtc_vtotal - m->crtc_vsync_end;
 229                 int vfp = m->crtc_vsync_start - m->crtc_vdisplay;
 230
 231                 if (interlaced)
 232                         vbp = vbp / 2 - 1;
 233                 val = VIDTCON00_VBPD_F(vbp - 1) | VIDTCON00_VFPD_F(vfp - 1);
 234                 writel(val, ctx->addr + DECON_VIDTCON00);
 235
 236                 val = VIDTCON01_VSPW_F(
 237                                 m->crtc_vsync_end - m->crtc_vsync_start - 1);
 238                 writel(val, ctx->addr + DECON_VIDTCON01);
 239
 240                 val = VIDTCON10_HBPD_F(
 241                                 m->crtc_htotal - m->crtc_hsync_end - 1) |
 242                         VIDTCON10_HFPD_F(
 243                                 m->crtc_hsync_start - m->crtc_hdisplay - 1);
 244                 writel(val, ctx->addr + DECON_VIDTCON10);
 245
 246                 val = VIDTCON11_HSPW_F(
 247                                 m->crtc_hsync_end - m->crtc_hsync_start - 1);
 248                 writel(val, ctx->addr + DECON_VIDTCON11);
 249         }
 250
 251         /* enable output and display signal */
 252         decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
 253
 254         decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
 255 }
 256
 257 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
 258                                  struct drm_framebuffer *fb)
 259 {
 260         unsigned long val;
 261
 262         val = readl(ctx->addr + DECON_WINCONx(win));
 263         val &= ~WINCONx_BPPMODE_MASK;
 264
 265         switch (fb->format->format) {
 266         case DRM_FORMAT_XRGB1555:
 267                 val |= WINCONx_BPPMODE_16BPP_I1555;
 268                 val |= WINCONx_HAWSWP_F;
 269                 val |= WINCONx_BURSTLEN_16WORD;
 270                 break;
 271         case DRM_FORMAT_RGB565:
 272                 val |= WINCONx_BPPMODE_16BPP_565;
 273                 val |= WINCONx_HAWSWP_F;
 274                 val |= WINCONx_BURSTLEN_16WORD;
 275                 break;
 276         case DRM_FORMAT_XRGB8888:
 277                 val |= WINCONx_BPPMODE_24BPP_888;
 278                 val |= WINCONx_WSWP_F;
 279                 val |= WINCONx_BURSTLEN_16WORD;
 280                 break;
 281         case DRM_FORMAT_ARGB8888:
 282         default:
 283                 val |= WINCONx_BPPMODE_32BPP_A8888;
 284                 val |= WINCONx_WSWP_F | WINCONx_BLD_PIX_F | WINCONx_ALPHA_SEL_F;
 285                 val |= WINCONx_BURSTLEN_16WORD;
 286                 break;
 287         }
 288
 289         DRM_DEBUG_KMS("cpp = %u\n", fb->format->cpp[0]);
 290
 291         /*
 292          * In case of exynos, setting dma-burst to 16Word causes permanent
 293          * tearing for very small buffers, e.g. cursor buffer. Burst Mode
 294          * switching which is based on plane size is not recommended as
 295          * plane size varies a lot towards the end of the screen and rapid
 296          * movement causes unstable DMA which results into iommu crash/tear.
 297          */
 298
 299         if (fb->width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
 300                 val &= ~WINCONx_BURSTLEN_MASK;
 301                 val |= WINCONx_BURSTLEN_8WORD;
 302         }
 303
 304         writel(val, ctx->addr + DECON_WINCONx(win));
 305 }
 306
 307 static void decon_shadow_protect(struct decon_context *ctx, bool protect)
 308 {
 309         decon_set_bits(ctx, DECON_SHADOWCON, SHADOWCON_PROTECT_MASK,
 310                        protect ? ~0 : 0);
 311 }
 312
 313 static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
 314 {
 315         struct decon_context *ctx = crtc->ctx;
 316
 317         decon_shadow_protect(ctx, true);
 318 }
 319
 320 #define BIT_VAL(x, e, s) (((x) & ((1 << ((e) - (s) + 1)) - 1)) << (s))
 321 #define COORDINATE_X(x) BIT_VAL((x), 23, 12)
 322 #define COORDINATE_Y(x) BIT_VAL((x), 11, 0)
 323
 324 static void decon_update_plane(struct exynos_drm_crtc *crtc,
 325                                struct exynos_drm_plane *plane)
 326 {
 327         struct exynos_drm_plane_state *state =
 328                                 to_exynos_plane_state(plane->base.state);
 329         struct decon_context *ctx = crtc->ctx;
 330         struct drm_framebuffer *fb = state->base.fb;
 331         unsigned int win = plane->index;
 332         unsigned int cpp = fb->format->cpp[0];
 333         unsigned int pitch = fb->pitches[0];
 334         dma_addr_t dma_addr = exynos_drm_fb_dma_addr(fb, 0);
 335         u32 val;
 336
 337         if (crtc->base.mode.flags & DRM_MODE_FLAG_INTERLACE) {
 338                 val = COORDINATE_X(state->crtc.x) |
 339                         COORDINATE_Y(state->crtc.y / 2);
 340                 writel(val, ctx->addr + DECON_VIDOSDxA(win));
 341
 342                 val = COORDINATE_X(state->crtc.x + state->crtc.w - 1) |
 343                         COORDINATE_Y((state->crtc.y + state->crtc.h) / 2 - 1);
 344                 writel(val, ctx->addr + DECON_VIDOSDxB(win));
 345         } else {
 346                 val = COORDINATE_X(state->crtc.x) | COORDINATE_Y(state->crtc.y);
 347                 writel(val, ctx->addr + DECON_VIDOSDxA(win));
 348
 349                 val = COORDINATE_X(state->crtc.x + state->crtc.w - 1) |
 350                                 COORDINATE_Y(state->crtc.y + state->crtc.h - 1);
 351                 writel(val, ctx->addr + DECON_VIDOSDxB(win));
 352         }
 353
 354         val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
 355                 VIDOSD_Wx_ALPHA_B_F(0x0);
 356         writel(val, ctx->addr + DECON_VIDOSDxC(win));
 357
 358         val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
 359                 VIDOSD_Wx_ALPHA_B_F(0x0);
 360         writel(val, ctx->addr + DECON_VIDOSDxD(win));
 361
 362         writel(dma_addr, ctx->addr + DECON_VIDW0xADD0B0(win));
 363
 364         val = dma_addr + pitch * state->src.h;
 365         writel(val, ctx->addr + DECON_VIDW0xADD1B0(win));
 366
 367         if (!(ctx->out_type & IFTYPE_HDMI))
 368                 val = BIT_VAL(pitch - state->crtc.w * cpp, 27, 14)
 369                         | BIT_VAL(state->crtc.w * cpp, 13, 0);
 370         else
 371                 val = BIT_VAL(pitch - state->crtc.w * cpp, 29, 15)
 372                         | BIT_VAL(state->crtc.w * cpp, 14, 0);
 373         writel(val, ctx->addr + DECON_VIDW0xADD2(win));
 374
 375         decon_win_set_pixfmt(ctx, win, fb);
 376
 377         /* window enable */
 378         decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, ~0);
 379 }
 380
 381 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
 382                                 struct exynos_drm_plane *plane)
 383 {
 384         struct decon_context *ctx = crtc->ctx;
 385         unsigned int win = plane->index;
 386
 387         decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
 388 }
 389
 390 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
 391 {
 392         struct decon_context *ctx = crtc->ctx;
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&ctx->vblank_lock, flags);
 396
 397         decon_shadow_protect(ctx, false);
 398
 399         decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
 400
 401         ctx->frame_id = decon_get_frame_count(ctx, true);
 402
 403         exynos_crtc_handle_event(crtc);
 404
 405         spin_unlock_irqrestore(&ctx->vblank_lock, flags);
 406 }
 407
 408 static void decon_swreset(struct decon_context *ctx)
 409 {
 410         unsigned long flags;
 411         u32 val;
 412         int ret;
 413
 414         writel(0, ctx->addr + DECON_VIDCON0);
 415         readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
 416                            ~val & VIDCON0_STOP_STATUS, 12, 20000);
 417
 418         writel(VIDCON0_SWRESET, ctx->addr + DECON_VIDCON0);
 419         ret = readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
 420                                  ~val & VIDCON0_SWRESET, 12, 20000);
 421
 422         WARN(ret < 0, "failed to software reset DECON\n");
 423
 424         spin_lock_irqsave(&ctx->vblank_lock, flags);
 425         ctx->frame_id = 0;
 426         spin_unlock_irqrestore(&ctx->vblank_lock, flags);
 427
 428         if (!(ctx->out_type & IFTYPE_HDMI))
 429                 return;
 430
 431         writel(VIDCON0_CLKVALUP | VIDCON0_VLCKFREE, ctx->addr + DECON_VIDCON0);
 432         decon_set_bits(ctx, DECON_CMU,
 433                        CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F, ~0);
 434         writel(VIDCON1_VCLK_RUN_VDEN_DISABLE, ctx->addr + DECON_VIDCON1);
 435         writel(CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F | CRCCTRL_CRCCLKEN,
 436                ctx->addr + DECON_CRCCTRL);
 437 }
 438
 439 static void decon_enable(struct exynos_drm_crtc *crtc)
 440 {
 441         struct decon_context *ctx = crtc->ctx;
 442
 443         pm_runtime_get_sync(ctx->dev);
 444
 445         exynos_drm_pipe_clk_enable(crtc, true);
 446
 447         decon_swreset(ctx);
 448
 449         decon_commit(ctx->crtc);
 450 }
 451
 452 static void decon_disable(struct exynos_drm_crtc *crtc)
 453 {
 454         struct decon_context *ctx = crtc->ctx;
 455         int i;
 456
 457         if (!(ctx->out_type & I80_HW_TRG))
 458                 synchronize_irq(ctx->te_irq);
 459         synchronize_irq(ctx->irq);
 460
 461         /*
 462          * We need to make sure that all windows are disabled before we
 463          * suspend that connector. Otherwise we might try to scan from
 464          * a destroyed buffer later.
 465          */
 466         for (i = ctx->first_win; i < WINDOWS_NR; i++)
 467                 decon_disable_plane(crtc, &ctx->planes[i]);
 468
 469         decon_swreset(ctx);
 470
 471         exynos_drm_pipe_clk_enable(crtc, false);
 472
 473         pm_runtime_put_sync(ctx->dev);
 474 }
 475
 476 static irqreturn_t decon_te_irq_handler(int irq, void *dev_id)
 477 {
 478         struct decon_context *ctx = dev_id;
 479
 480         decon_set_bits(ctx, DECON_TRIGCON, TRIGCON_SWTRIGCMD, ~0);
 481
 482         return IRQ_HANDLED;
 483 }
 484
 485 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
 486 {
 487         struct decon_context *ctx = crtc->ctx;
 488         int win, i, ret;
 489
 490         DRM_DEBUG_KMS("%s\n", __FILE__);
 491
 492         for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
 493                 ret = clk_prepare_enable(ctx->clks[i]);
 494                 if (ret < 0)
 495                         goto err;
 496         }
 497
 498         decon_shadow_protect(ctx, true);
 499         for (win = 0; win < WINDOWS_NR; win++)
 500                 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
 501         decon_shadow_protect(ctx, false);
 502
 503         decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
 504
 505         /* TODO: wait for possible vsync */
 506         msleep(50);
 507
 508 err:
 509         while (--i >= 0)
 510                 clk_disable_unprepare(ctx->clks[i]);
 511 }
 512
 513 static enum drm_mode_status decon_mode_valid(struct exynos_drm_crtc *crtc,
 514                 const struct drm_display_mode *mode)
 515 {
 516         struct decon_context *ctx = crtc->ctx;
 517
 518         ctx->irq = crtc->i80_mode ? ctx->irq_lcd_sys : ctx->irq_vsync;
 519
 520         if (ctx->irq)
 521                 return MODE_OK;
 522
 523         dev_info(ctx->dev, "Sink requires %s mode, but appropriate interrupt is not provided.\n",
 524                         crtc->i80_mode ? "command" : "video");
 525
 526         return MODE_BAD;
 527 }
 528
 529 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
 530         .enable                 = decon_enable,
 531         .disable                = decon_disable,
 532         .enable_vblank          = decon_enable_vblank,
 533         .disable_vblank         = decon_disable_vblank,
 534         .get_vblank_counter     = decon_get_vblank_counter,
 535         .atomic_begin           = decon_atomic_begin,
 536         .update_plane           = decon_update_plane,
 537         .disable_plane          = decon_disable_plane,
 538         .mode_valid             = decon_mode_valid,
 539         .atomic_flush           = decon_atomic_flush,
 540 };
 541
 542 static int decon_bind(struct device *dev, struct device *master, void *data)
 543 {
 544         struct decon_context *ctx = dev_get_drvdata(dev);
 545         struct drm_device *drm_dev = data;
 546         struct exynos_drm_plane *exynos_plane;
 547         enum exynos_drm_output_type out_type;
 548         unsigned int win;
 549         int ret;
 550
 551         ctx->drm_dev = drm_dev;
 552         drm_dev->max_vblank_count = 0xffffffff;
 553
 554         for (win = ctx->first_win; win < WINDOWS_NR; win++) {
 555                 int tmp = (win == ctx->first_win) ? 0 : win;
 556
 557                 ctx->configs[win].pixel_formats = decon_formats;
 558                 ctx->configs[win].num_pixel_formats = ARRAY_SIZE(decon_formats);
 559                 ctx->configs[win].zpos = win;
 560                 ctx->configs[win].type = decon_win_types[tmp];
 561
 562                 ret = exynos_plane_init(drm_dev, &ctx->planes[win], win,
 563                                         &ctx->configs[win]);
 564                 if (ret)
 565                         return ret;
 566         }
 567
 568         exynos_plane = &ctx->planes[ctx->first_win];
 569         out_type = (ctx->out_type & IFTYPE_HDMI) ? EXYNOS_DISPLAY_TYPE_HDMI
 570                                                   : EXYNOS_DISPLAY_TYPE_LCD;
 571         ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
 572                         out_type, &decon_crtc_ops, ctx);
 573         if (IS_ERR(ctx->crtc))
 574                 return PTR_ERR(ctx->crtc);
 575
 576         decon_clear_channels(ctx->crtc);
 577
 578         return drm_iommu_attach_device(drm_dev, dev);
 579 }
 580
 581 static void decon_unbind(struct device *dev, struct device *master, void *data)
 582 {
 583         struct decon_context *ctx = dev_get_drvdata(dev);
 584
 585         decon_disable(ctx->crtc);
 586
 587         /* detach this sub driver from iommu mapping if supported. */
 588         drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
 589 }
 590
 591 static const struct component_ops decon_component_ops = {
 592         .bind   = decon_bind,
 593         .unbind = decon_unbind,
 594 };
 595
 596 static void decon_handle_vblank(struct decon_context *ctx)
 597 {
 598         u32 frm;
 599
 600         spin_lock(&ctx->vblank_lock);
 601
 602         frm = decon_get_frame_count(ctx, true);
 603
 604         if (frm != ctx->frame_id) {
 605                 /* handle only if incremented, take care of wrap-around */
 606                 if ((s32)(frm - ctx->frame_id) > 0)
 607                         drm_crtc_handle_vblank(&ctx->crtc->base);
 608                 ctx->frame_id = frm;
 609         }
 610
 611         spin_unlock(&ctx->vblank_lock);
 612 }
 613
 614 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
 615 {
 616         struct decon_context *ctx = dev_id;
 617         u32 val;
 618
 619         val = readl(ctx->addr + DECON_VIDINTCON1);
 620         val &= VIDINTCON1_INTFRMDONEPEND | VIDINTCON1_INTFRMPEND;
 621
 622         if (val) {
 623                 writel(val, ctx->addr + DECON_VIDINTCON1);
 624                 if (ctx->out_type & IFTYPE_HDMI) {
 625                         val = readl(ctx->addr + DECON_VIDOUTCON0);
 626                         val &= VIDOUT_INTERLACE_EN_F | VIDOUT_INTERLACE_FIELD_F;
 627                         if (val ==
 628                             (VIDOUT_INTERLACE_EN_F | VIDOUT_INTERLACE_FIELD_F))
 629                                 return IRQ_HANDLED;
 630                 }
 631                 decon_handle_vblank(ctx);
 632         }
 633
 634         return IRQ_HANDLED;
 635 }
 636
 637 #ifdef CONFIG_PM
 638 static int exynos5433_decon_suspend(struct device *dev)
 639 {
 640         struct decon_context *ctx = dev_get_drvdata(dev);
 641         int i = ARRAY_SIZE(decon_clks_name);
 642
 643         while (--i >= 0)
 644                 clk_disable_unprepare(ctx->clks[i]);
 645
 646         return 0;
 647 }
 648
 649 static int exynos5433_decon_resume(struct device *dev)
 650 {
 651         struct decon_context *ctx = dev_get_drvdata(dev);
 652         int i, ret;
 653
 654         for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
 655                 ret = clk_prepare_enable(ctx->clks[i]);
 656                 if (ret < 0)
 657                         goto err;
 658         }
 659
 660         return 0;
 661
 662 err:
 663         while (--i >= 0)
 664                 clk_disable_unprepare(ctx->clks[i]);
 665
 666         return ret;
 667 }
 668 #endif
 669
 670 static const struct dev_pm_ops exynos5433_decon_pm_ops = {
 671         SET_RUNTIME_PM_OPS(exynos5433_decon_suspend, exynos5433_decon_resume,
 672                            NULL)
 673 };
 674
 675 static const struct of_device_id exynos5433_decon_driver_dt_match[] = {
 676         {
 677                 .compatible = "samsung,exynos5433-decon",
 678                 .data = (void *)I80_HW_TRG
 679         },
 680         {
 681                 .compatible = "samsung,exynos5433-decon-tv",
 682                 .data = (void *)(I80_HW_TRG | IFTYPE_HDMI)
 683         },
 684         {},
 685 };
 686 MODULE_DEVICE_TABLE(of, exynos5433_decon_driver_dt_match);
 687
 688 static int decon_conf_irq(struct decon_context *ctx, const char *name,
 689                 irq_handler_t handler, unsigned long int flags)
 690 {
 691         struct platform_device *pdev = to_platform_device(ctx->dev);
 692         int ret, irq = platform_get_irq_byname(pdev, name);
 693
 694         if (irq < 0) {
 695                 switch (irq) {
 696                 case -EPROBE_DEFER:
 697                         return irq;
 698                 case -ENODATA:
 699                 case -ENXIO:
 700                         return 0;
 701                 default:
 702                         dev_err(ctx->dev, "IRQ %s get failed, %d\n", name, irq);
 703                         return irq;
 704                 }
 705         }
 706         irq_set_status_flags(irq, IRQ_NOAUTOEN);
 707         ret = devm_request_irq(ctx->dev, irq, handler, flags, "drm_decon", ctx);
 708         if (ret < 0) {
 709                 dev_err(ctx->dev, "IRQ %s request failed\n", name);
 710                 return ret;
 711         }
 712
 713         return irq;
 714 }
 715
 716 static int exynos5433_decon_probe(struct platform_device *pdev)
 717 {
 718         struct device *dev = &pdev->dev;
 719         struct decon_context *ctx;
 720         struct resource *res;
 721         int ret;
 722         int i;
 723
 724         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 725         if (!ctx)
 726                 return -ENOMEM;
 727
 728         ctx->dev = dev;
 729         ctx->out_type = (unsigned long)of_device_get_match_data(dev);
 730         spin_lock_init(&ctx->vblank_lock);
 731
 732         if (ctx->out_type & IFTYPE_HDMI)
 733                 ctx->first_win = 1;
 734
 735         for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
 736                 struct clk *clk;
 737
 738                 clk = devm_clk_get(ctx->dev, decon_clks_name[i]);
 739                 if (IS_ERR(clk))
 740                         return PTR_ERR(clk);
 741
 742                 ctx->clks[i] = clk;
 743         }
 744
 745         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 746         if (!res) {
 747                 dev_err(dev, "cannot find IO resource\n");
 748                 return -ENXIO;
 749         }
 750
 751         ctx->addr = devm_ioremap_resource(dev, res);
 752         if (IS_ERR(ctx->addr)) {
 753                 dev_err(dev, "ioremap failed\n");
 754                 return PTR_ERR(ctx->addr);
 755         }
 756
 757         ret = decon_conf_irq(ctx, "vsync", decon_irq_handler, 0);
 758         if (ret < 0)
 759                 return ret;
 760         ctx->irq_vsync = ret;
 761
 762         ret = decon_conf_irq(ctx, "lcd_sys", decon_irq_handler, 0);
 763         if (ret < 0)
 764                 return ret;
 765         ctx->irq_lcd_sys = ret;
 766
 767         ret = decon_conf_irq(ctx, "te", decon_te_irq_handler,
 768                         IRQF_TRIGGER_RISING);
 769         if (ret < 0)
 770                         return ret;
 771         if (ret) {
 772                 ctx->te_irq = ret;
 773                 ctx->out_type &= ~I80_HW_TRG;
 774         }
 775
 776         if (ctx->out_type & I80_HW_TRG) {
 777                 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
 778                                                         "samsung,disp-sysreg");
 779                 if (IS_ERR(ctx->sysreg)) {
 780                         dev_err(dev, "failed to get system register\n");
 781                         return PTR_ERR(ctx->sysreg);
 782                 }
 783         }
 784
 785         platform_set_drvdata(pdev, ctx);
 786
 787         pm_runtime_enable(dev);
 788
 789         ret = component_add(dev, &decon_component_ops);
 790         if (ret)
 791                 goto err_disable_pm_runtime;
 792
 793         return 0;
 794
 795 err_disable_pm_runtime:
 796         pm_runtime_disable(dev);
 797
 798         return ret;
 799 }
 800
 801 static int exynos5433_decon_remove(struct platform_device *pdev)
 802 {
 803         pm_runtime_disable(&pdev->dev);
 804
 805         component_del(&pdev->dev, &decon_component_ops);
 806
 807         return 0;
 808 }
 809
 810 struct platform_driver exynos5433_decon_driver = {
 811         .probe          = exynos5433_decon_probe,
 812         .remove         = exynos5433_decon_remove,
 813         .driver         = {
 814                 .name   = "exynos5433-decon",
 815                 .pm     = &exynos5433_decon_pm_ops,
 816                 .of_match_table = exynos5433_decon_driver_dt_match,
 817         },
 818 };