drivers/gpu/drm/exynos/exynos7_drm_decon.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* drivers/gpu/drm/exynos/exynos7_drm_decon.c
   3  *
   4  * Copyright (C) 2014 Samsung Electronics Co.Ltd
   5  * Authors:
   6  *      Akshu Agarwal <[email protected]>
   7  *      Ajay Kumar <[email protected]>
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/component.h>
  12 #include <linux/kernel.h>
  13 #include <linux/of.h>
  14 #include <linux/of_address.h>
  15 #include <linux/of_device.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm_runtime.h>
  18
  19 #include <video/of_display_timing.h>
  20 #include <video/of_videomode.h>
  21
  22 #include <drm/drm_fourcc.h>
  23 #include <drm/drm_vblank.h>
  24 #include <drm/exynos_drm.h>
  25
  26 #include "exynos_drm_crtc.h"
  27 #include "exynos_drm_drv.h"
  28 #include "exynos_drm_fb.h"
  29 #include "exynos_drm_plane.h"
  30 #include "regs-decon7.h"
  31
  32 /*
  33  * DECON stands for Display and Enhancement controller.
  34  */
  35
  36 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
  37
  38 #define WINDOWS_NR      2
  39
  40 struct decon_context {
  41         struct device                   *dev;
  42         struct drm_device               *drm_dev;
  43         struct exynos_drm_crtc          *crtc;
  44         struct exynos_drm_plane         planes[WINDOWS_NR];
  45         struct exynos_drm_plane_config  configs[WINDOWS_NR];
  46         struct clk                      *pclk;
  47         struct clk                      *aclk;
  48         struct clk                      *eclk;
  49         struct clk                      *vclk;
  50         void __iomem                    *regs;
  51         unsigned long                   irq_flags;
  52         bool                            i80_if;
  53         bool                            suspended;
  54         wait_queue_head_t               wait_vsync_queue;
  55         atomic_t                        wait_vsync_event;
  56
  57         struct drm_encoder *encoder;
  58 };
  59
  60 static const struct of_device_id decon_driver_dt_match[] = {
  61         {.compatible = "samsung,exynos7-decon"},
  62         {},
  63 };
  64 MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
  65
  66 static const uint32_t decon_formats[] = {
  67         DRM_FORMAT_RGB565,
  68         DRM_FORMAT_XRGB8888,
  69         DRM_FORMAT_XBGR8888,
  70         DRM_FORMAT_RGBX8888,
  71         DRM_FORMAT_BGRX8888,
  72         DRM_FORMAT_ARGB8888,
  73         DRM_FORMAT_ABGR8888,
  74         DRM_FORMAT_RGBA8888,
  75         DRM_FORMAT_BGRA8888,
  76 };
  77
  78 static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
  79         DRM_PLANE_TYPE_PRIMARY,
  80         DRM_PLANE_TYPE_CURSOR,
  81 };
  82
  83 static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
  84 {
  85         struct decon_context *ctx = crtc->ctx;
  86
  87         if (ctx->suspended)
  88                 return;
  89
  90         atomic_set(&ctx->wait_vsync_event, 1);
  91
  92         /*
  93          * wait for DECON to signal VSYNC interrupt or return after
  94          * timeout which is set to 50ms (refresh rate of 20).
  95          */
  96         if (!wait_event_timeout(ctx->wait_vsync_queue,
  97                                 !atomic_read(&ctx->wait_vsync_event),
  98                                 HZ/20))
  99                 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");
 100 }
 101
 102 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
 103 {
 104         struct decon_context *ctx = crtc->ctx;
 105         unsigned int win, ch_enabled = 0;
 106
 107         /* Check if any channel is enabled. */
 108         for (win = 0; win < WINDOWS_NR; win++) {
 109                 u32 val = readl(ctx->regs + WINCON(win));
 110
 111                 if (val & WINCONx_ENWIN) {
 112                         val &= ~WINCONx_ENWIN;
 113                         writel(val, ctx->regs + WINCON(win));
 114                         ch_enabled = 1;
 115                 }
 116         }
 117
 118         /* Wait for vsync, as disable channel takes effect at next vsync */
 119         if (ch_enabled)
 120                 decon_wait_for_vblank(ctx->crtc);
 121 }
 122
 123 static int decon_ctx_initialize(struct decon_context *ctx,
 124                         struct drm_device *drm_dev)
 125 {
 126         ctx->drm_dev = drm_dev;
 127
 128         decon_clear_channels(ctx->crtc);
 129
 130         return exynos_drm_register_dma(drm_dev, ctx->dev);
 131 }
 132
 133 static void decon_ctx_remove(struct decon_context *ctx)
 134 {
 135         /* detach this sub driver from iommu mapping if supported. */
 136         exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev);
 137 }
 138
 139 static u32 decon_calc_clkdiv(struct decon_context *ctx,
 140                 const struct drm_display_mode *mode)
 141 {
 142         unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
 143         u32 clkdiv;
 144
 145         /* Find the clock divider value that gets us closest to ideal_clk */
 146         clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
 147
 148         return (clkdiv < 0x100) ? clkdiv : 0xff;
 149 }
 150
 151 static void decon_commit(struct exynos_drm_crtc *crtc)
 152 {
 153         struct decon_context *ctx = crtc->ctx;
 154         struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
 155         u32 val, clkdiv;
 156
 157         if (ctx->suspended)
 158                 return;
 159
 160         /* nothing to do if we haven't set the mode yet */
 161         if (mode->htotal == 0 || mode->vtotal == 0)
 162                 return;
 163
 164         if (!ctx->i80_if) {
 165                 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
 166               /* setup vertical timing values. */
 167                 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
 168                 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
 169                 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
 170
 171                 val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);
 172                 writel(val, ctx->regs + VIDTCON0);
 173
 174                 val = VIDTCON1_VSPW(vsync_len - 1);
 175                 writel(val, ctx->regs + VIDTCON1);
 176
 177                 /* setup horizontal timing values.  */
 178                 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
 179                 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
 180                 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
 181
 182                 /* setup horizontal timing values.  */
 183                 val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
 184                 writel(val, ctx->regs + VIDTCON2);
 185
 186                 val = VIDTCON3_HSPW(hsync_len - 1);
 187                 writel(val, ctx->regs + VIDTCON3);
 188         }
 189
 190         /* setup horizontal and vertical display size. */
 191         val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
 192                VIDTCON4_HOZVAL(mode->hdisplay - 1);
 193         writel(val, ctx->regs + VIDTCON4);
 194
 195         writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
 196
 197         /*
 198          * fields of register with prefix '_F' would be updated
 199          * at vsync(same as dma start)
 200          */
 201         val = VIDCON0_ENVID | VIDCON0_ENVID_F;
 202         writel(val, ctx->regs + VIDCON0);
 203
 204         clkdiv = decon_calc_clkdiv(ctx, mode);
 205         if (clkdiv > 1) {
 206                 val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
 207                 writel(val, ctx->regs + VCLKCON1);
 208                 writel(val, ctx->regs + VCLKCON2);
 209         }
 210
 211         val = readl(ctx->regs + DECON_UPDATE);
 212         val |= DECON_UPDATE_STANDALONE_F;
 213         writel(val, ctx->regs + DECON_UPDATE);
 214 }
 215
 216 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
 217 {
 218         struct decon_context *ctx = crtc->ctx;
 219         u32 val;
 220
 221         if (ctx->suspended)
 222                 return -EPERM;
 223
 224         if (!test_and_set_bit(0, &ctx->irq_flags)) {
 225                 val = readl(ctx->regs + VIDINTCON0);
 226
 227                 val |= VIDINTCON0_INT_ENABLE;
 228
 229                 if (!ctx->i80_if) {
 230                         val |= VIDINTCON0_INT_FRAME;
 231                         val &= ~VIDINTCON0_FRAMESEL0_MASK;
 232                         val |= VIDINTCON0_FRAMESEL0_VSYNC;
 233                 }
 234
 235                 writel(val, ctx->regs + VIDINTCON0);
 236         }
 237
 238         return 0;
 239 }
 240
 241 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
 242 {
 243         struct decon_context *ctx = crtc->ctx;
 244         u32 val;
 245
 246         if (ctx->suspended)
 247                 return;
 248
 249         if (test_and_clear_bit(0, &ctx->irq_flags)) {
 250                 val = readl(ctx->regs + VIDINTCON0);
 251
 252                 val &= ~VIDINTCON0_INT_ENABLE;
 253                 if (!ctx->i80_if)
 254                         val &= ~VIDINTCON0_INT_FRAME;
 255
 256                 writel(val, ctx->regs + VIDINTCON0);
 257         }
 258 }
 259
 260 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
 261                                  struct drm_framebuffer *fb)
 262 {
 263         unsigned long val;
 264         int padding;
 265
 266         val = readl(ctx->regs + WINCON(win));
 267         val &= ~WINCONx_BPPMODE_MASK;
 268
 269         switch (fb->format->format) {
 270         case DRM_FORMAT_RGB565:
 271                 val |= WINCONx_BPPMODE_16BPP_565;
 272                 val |= WINCONx_BURSTLEN_16WORD;
 273                 break;
 274         case DRM_FORMAT_XRGB8888:
 275                 val |= WINCONx_BPPMODE_24BPP_xRGB;
 276                 val |= WINCONx_BURSTLEN_16WORD;
 277                 break;
 278         case DRM_FORMAT_XBGR8888:
 279                 val |= WINCONx_BPPMODE_24BPP_xBGR;
 280                 val |= WINCONx_BURSTLEN_16WORD;
 281                 break;
 282         case DRM_FORMAT_RGBX8888:
 283                 val |= WINCONx_BPPMODE_24BPP_RGBx;
 284                 val |= WINCONx_BURSTLEN_16WORD;
 285                 break;
 286         case DRM_FORMAT_BGRX8888:
 287                 val |= WINCONx_BPPMODE_24BPP_BGRx;
 288                 val |= WINCONx_BURSTLEN_16WORD;
 289                 break;
 290         case DRM_FORMAT_ARGB8888:
 291                 val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
 292                         WINCONx_ALPHA_SEL;
 293                 val |= WINCONx_BURSTLEN_16WORD;
 294                 break;
 295         case DRM_FORMAT_ABGR8888:
 296                 val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
 297                         WINCONx_ALPHA_SEL;
 298                 val |= WINCONx_BURSTLEN_16WORD;
 299                 break;
 300         case DRM_FORMAT_RGBA8888:
 301                 val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
 302                         WINCONx_ALPHA_SEL;
 303                 val |= WINCONx_BURSTLEN_16WORD;
 304                 break;
 305         case DRM_FORMAT_BGRA8888:
 306         default:
 307                 val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
 308                         WINCONx_ALPHA_SEL;
 309                 val |= WINCONx_BURSTLEN_16WORD;
 310                 break;
 311         }
 312
 313         DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]);
 314
 315         /*
 316          * In case of exynos, setting dma-burst to 16Word causes permanent
 317          * tearing for very small buffers, e.g. cursor buffer. Burst Mode
 318          * switching which is based on plane size is not recommended as
 319          * plane size varies a lot towards the end of the screen and rapid
 320          * movement causes unstable DMA which results into iommu crash/tear.
 321          */
 322
 323         padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width;
 324         if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {
 325                 val &= ~WINCONx_BURSTLEN_MASK;
 326                 val |= WINCONx_BURSTLEN_8WORD;
 327         }
 328
 329         writel(val, ctx->regs + WINCON(win));
 330 }
 331
 332 static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
 333 {
 334         unsigned int keycon0 = 0, keycon1 = 0;
 335
 336         keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
 337                         WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
 338
 339         keycon1 = WxKEYCON1_COLVAL(0xffffffff);
 340
 341         writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
 342         writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
 343 }
 344
 345 /**
 346  * shadow_protect_win() - disable updating values from shadow registers at vsync
 347  *
 348  * @win: window to protect registers for
 349  * @protect: 1 to protect (disable updates)
 350  */
 351 static void decon_shadow_protect_win(struct decon_context *ctx,
 352                                      unsigned int win, bool protect)
 353 {
 354         u32 bits, val;
 355
 356         bits = SHADOWCON_WINx_PROTECT(win);
 357
 358         val = readl(ctx->regs + SHADOWCON);
 359         if (protect)
 360                 val |= bits;
 361         else
 362                 val &= ~bits;
 363         writel(val, ctx->regs + SHADOWCON);
 364 }
 365
 366 static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
 367 {
 368         struct decon_context *ctx = crtc->ctx;
 369         int i;
 370
 371         if (ctx->suspended)
 372                 return;
 373
 374         for (i = 0; i < WINDOWS_NR; i++)
 375                 decon_shadow_protect_win(ctx, i, true);
 376 }
 377
 378 static void decon_update_plane(struct exynos_drm_crtc *crtc,
 379                                struct exynos_drm_plane *plane)
 380 {
 381         struct exynos_drm_plane_state *state =
 382                                 to_exynos_plane_state(plane->base.state);
 383         struct decon_context *ctx = crtc->ctx;
 384         struct drm_framebuffer *fb = state->base.fb;
 385         int padding;
 386         unsigned long val, alpha;
 387         unsigned int last_x;
 388         unsigned int last_y;
 389         unsigned int win = plane->index;
 390         unsigned int cpp = fb->format->cpp[0];
 391         unsigned int pitch = fb->pitches[0];
 392
 393         if (ctx->suspended)
 394                 return;
 395
 396         /*
 397          * SHADOWCON/PRTCON register is used for enabling timing.
 398          *
 399          * for example, once only width value of a register is set,
 400          * if the dma is started then decon hardware could malfunction so
 401          * with protect window setting, the register fields with prefix '_F'
 402          * wouldn't be updated at vsync also but updated once unprotect window
 403          * is set.
 404          */
 405
 406         /* buffer start address */
 407         val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0);
 408         writel(val, ctx->regs + VIDW_BUF_START(win));
 409
 410         padding = (pitch / cpp) - fb->width;
 411
 412         /* buffer size */
 413         writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));
 414         writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win));
 415
 416         /* offset from the start of the buffer to read */
 417         writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win));
 418         writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win));
 419
 420         DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n",
 421                         (unsigned long)val);
 422         DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",
 423                         state->crtc.w, state->crtc.h);
 424
 425         val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
 426                 VIDOSDxA_TOPLEFT_Y(state->crtc.y);
 427         writel(val, ctx->regs + VIDOSD_A(win));
 428
 429         last_x = state->crtc.x + state->crtc.w;
 430         if (last_x)
 431                 last_x--;
 432         last_y = state->crtc.y + state->crtc.h;
 433         if (last_y)
 434                 last_y--;
 435
 436         val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y);
 437
 438         writel(val, ctx->regs + VIDOSD_B(win));
 439
 440         DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
 441                         state->crtc.x, state->crtc.y, last_x, last_y);
 442
 443         /* OSD alpha */
 444         alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
 445                         VIDOSDxC_ALPHA0_G_F(0x0) |
 446                         VIDOSDxC_ALPHA0_B_F(0x0);
 447
 448         writel(alpha, ctx->regs + VIDOSD_C(win));
 449
 450         alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
 451                         VIDOSDxD_ALPHA1_G_F(0xff) |
 452                         VIDOSDxD_ALPHA1_B_F(0xff);
 453
 454         writel(alpha, ctx->regs + VIDOSD_D(win));
 455
 456         decon_win_set_pixfmt(ctx, win, fb);
 457
 458         /* hardware window 0 doesn't support color key. */
 459         if (win != 0)
 460                 decon_win_set_colkey(ctx, win);
 461
 462         /* wincon */
 463         val = readl(ctx->regs + WINCON(win));
 464         val |= WINCONx_TRIPLE_BUF_MODE;
 465         val |= WINCONx_ENWIN;
 466         writel(val, ctx->regs + WINCON(win));
 467
 468         /* Enable DMA channel and unprotect windows */
 469         decon_shadow_protect_win(ctx, win, false);
 470
 471         val = readl(ctx->regs + DECON_UPDATE);
 472         val |= DECON_UPDATE_STANDALONE_F;
 473         writel(val, ctx->regs + DECON_UPDATE);
 474 }
 475
 476 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
 477                                 struct exynos_drm_plane *plane)
 478 {
 479         struct decon_context *ctx = crtc->ctx;
 480         unsigned int win = plane->index;
 481         u32 val;
 482
 483         if (ctx->suspended)
 484                 return;
 485
 486         /* protect windows */
 487         decon_shadow_protect_win(ctx, win, true);
 488
 489         /* wincon */
 490         val = readl(ctx->regs + WINCON(win));
 491         val &= ~WINCONx_ENWIN;
 492         writel(val, ctx->regs + WINCON(win));
 493
 494         val = readl(ctx->regs + DECON_UPDATE);
 495         val |= DECON_UPDATE_STANDALONE_F;
 496         writel(val, ctx->regs + DECON_UPDATE);
 497 }
 498
 499 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
 500 {
 501         struct decon_context *ctx = crtc->ctx;
 502         int i;
 503
 504         if (ctx->suspended)
 505                 return;
 506
 507         for (i = 0; i < WINDOWS_NR; i++)
 508                 decon_shadow_protect_win(ctx, i, false);
 509         exynos_crtc_handle_event(crtc);
 510 }
 511
 512 static void decon_init(struct decon_context *ctx)
 513 {
 514         u32 val;
 515
 516         writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
 517
 518         val = VIDOUTCON0_DISP_IF_0_ON;
 519         if (!ctx->i80_if)
 520                 val |= VIDOUTCON0_RGBIF;
 521         writel(val, ctx->regs + VIDOUTCON0);
 522
 523         writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
 524
 525         if (!ctx->i80_if)
 526                 writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
 527 }
 528
 529 static void decon_enable(struct exynos_drm_crtc *crtc)
 530 {
 531         struct decon_context *ctx = crtc->ctx;
 532
 533         if (!ctx->suspended)
 534                 return;
 535
 536         pm_runtime_get_sync(ctx->dev);
 537
 538         decon_init(ctx);
 539
 540         /* if vblank was enabled status, enable it again. */
 541         if (test_and_clear_bit(0, &ctx->irq_flags))
 542                 decon_enable_vblank(ctx->crtc);
 543
 544         decon_commit(ctx->crtc);
 545
 546         ctx->suspended = false;
 547 }
 548
 549 static void decon_disable(struct exynos_drm_crtc *crtc)
 550 {
 551         struct decon_context *ctx = crtc->ctx;
 552         int i;
 553
 554         if (ctx->suspended)
 555                 return;
 556
 557         /*
 558          * We need to make sure that all windows are disabled before we
 559          * suspend that connector. Otherwise we might try to scan from
 560          * a destroyed buffer later.
 561          */
 562         for (i = 0; i < WINDOWS_NR; i++)
 563                 decon_disable_plane(crtc, &ctx->planes[i]);
 564
 565         pm_runtime_put_sync(ctx->dev);
 566
 567         ctx->suspended = true;
 568 }
 569
 570 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
 571         .enable = decon_enable,
 572         .disable = decon_disable,
 573         .enable_vblank = decon_enable_vblank,
 574         .disable_vblank = decon_disable_vblank,
 575         .atomic_begin = decon_atomic_begin,
 576         .update_plane = decon_update_plane,
 577         .disable_plane = decon_disable_plane,
 578         .atomic_flush = decon_atomic_flush,
 579 };
 580
 581
 582 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
 583 {
 584         struct decon_context *ctx = (struct decon_context *)dev_id;
 585         u32 val, clear_bit;
 586
 587         val = readl(ctx->regs + VIDINTCON1);
 588
 589         clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
 590         if (val & clear_bit)
 591                 writel(clear_bit, ctx->regs + VIDINTCON1);
 592
 593         /* check the crtc is detached already from encoder */
 594         if (!ctx->drm_dev)
 595                 goto out;
 596
 597         if (!ctx->i80_if) {
 598                 drm_crtc_handle_vblank(&ctx->crtc->base);
 599
 600                 /* set wait vsync event to zero and wake up queue. */
 601                 if (atomic_read(&ctx->wait_vsync_event)) {
 602                         atomic_set(&ctx->wait_vsync_event, 0);
 603                         wake_up(&ctx->wait_vsync_queue);
 604                 }
 605         }
 606 out:
 607         return IRQ_HANDLED;
 608 }
 609
 610 static int decon_bind(struct device *dev, struct device *master, void *data)
 611 {
 612         struct decon_context *ctx = dev_get_drvdata(dev);
 613         struct drm_device *drm_dev = data;
 614         struct exynos_drm_plane *exynos_plane;
 615         unsigned int i;
 616         int ret;
 617
 618         ret = decon_ctx_initialize(ctx, drm_dev);
 619         if (ret) {
 620                 DRM_DEV_ERROR(dev, "decon_ctx_initialize failed.\n");
 621                 return ret;
 622         }
 623
 624         for (i = 0; i < WINDOWS_NR; i++) {
 625                 ctx->configs[i].pixel_formats = decon_formats;
 626                 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats);
 627                 ctx->configs[i].zpos = i;
 628                 ctx->configs[i].type = decon_win_types[i];
 629
 630                 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
 631                                         &ctx->configs[i]);
 632                 if (ret)
 633                         return ret;
 634         }
 635
 636         exynos_plane = &ctx->planes[DEFAULT_WIN];
 637         ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
 638                         EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx);
 639         if (IS_ERR(ctx->crtc)) {
 640                 decon_ctx_remove(ctx);
 641                 return PTR_ERR(ctx->crtc);
 642         }
 643
 644         if (ctx->encoder)
 645                 exynos_dpi_bind(drm_dev, ctx->encoder);
 646
 647         return 0;
 648
 649 }
 650
 651 static void decon_unbind(struct device *dev, struct device *master,
 652                         void *data)
 653 {
 654         struct decon_context *ctx = dev_get_drvdata(dev);
 655
 656         decon_disable(ctx->crtc);
 657
 658         if (ctx->encoder)
 659                 exynos_dpi_remove(ctx->encoder);
 660
 661         decon_ctx_remove(ctx);
 662 }
 663
 664 static const struct component_ops decon_component_ops = {
 665         .bind   = decon_bind,
 666         .unbind = decon_unbind,
 667 };
 668
 669 static int decon_probe(struct platform_device *pdev)
 670 {
 671         struct device *dev = &pdev->dev;
 672         struct decon_context *ctx;
 673         struct device_node *i80_if_timings;
 674         struct resource *res;
 675         int ret;
 676
 677         if (!dev->of_node)
 678                 return -ENODEV;
 679
 680         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 681         if (!ctx)
 682                 return -ENOMEM;
 683
 684         ctx->dev = dev;
 685         ctx->suspended = true;
 686
 687         i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
 688         if (i80_if_timings)
 689                 ctx->i80_if = true;
 690         of_node_put(i80_if_timings);
 691
 692         ctx->regs = of_iomap(dev->of_node, 0);
 693         if (!ctx->regs)
 694                 return -ENOMEM;
 695
 696         ctx->pclk = devm_clk_get(dev, "pclk_decon0");
 697         if (IS_ERR(ctx->pclk)) {
 698                 dev_err(dev, "failed to get bus clock pclk\n");
 699                 ret = PTR_ERR(ctx->pclk);
 700                 goto err_iounmap;
 701         }
 702
 703         ctx->aclk = devm_clk_get(dev, "aclk_decon0");
 704         if (IS_ERR(ctx->aclk)) {
 705                 dev_err(dev, "failed to get bus clock aclk\n");
 706                 ret = PTR_ERR(ctx->aclk);
 707                 goto err_iounmap;
 708         }
 709
 710         ctx->eclk = devm_clk_get(dev, "decon0_eclk");
 711         if (IS_ERR(ctx->eclk)) {
 712                 dev_err(dev, "failed to get eclock\n");
 713                 ret = PTR_ERR(ctx->eclk);
 714                 goto err_iounmap;
 715         }
 716
 717         ctx->vclk = devm_clk_get(dev, "decon0_vclk");
 718         if (IS_ERR(ctx->vclk)) {
 719                 dev_err(dev, "failed to get vclock\n");
 720                 ret = PTR_ERR(ctx->vclk);
 721                 goto err_iounmap;
 722         }
 723
 724         res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
 725                                            ctx->i80_if ? "lcd_sys" : "vsync");
 726         if (!res) {
 727                 dev_err(dev, "irq request failed.\n");
 728                 ret = -ENXIO;
 729                 goto err_iounmap;
 730         }
 731
 732         ret = devm_request_irq(dev, res->start, decon_irq_handler,
 733                                                         0, "drm_decon", ctx);
 734         if (ret) {
 735                 dev_err(dev, "irq request failed.\n");
 736                 goto err_iounmap;
 737         }
 738
 739         init_waitqueue_head(&ctx->wait_vsync_queue);
 740         atomic_set(&ctx->wait_vsync_event, 0);
 741
 742         platform_set_drvdata(pdev, ctx);
 743
 744         ctx->encoder = exynos_dpi_probe(dev);
 745         if (IS_ERR(ctx->encoder)) {
 746                 ret = PTR_ERR(ctx->encoder);
 747                 goto err_iounmap;
 748         }
 749
 750         pm_runtime_enable(dev);
 751
 752         ret = component_add(dev, &decon_component_ops);
 753         if (ret)
 754                 goto err_disable_pm_runtime;
 755
 756         return ret;
 757
 758 err_disable_pm_runtime:
 759         pm_runtime_disable(dev);
 760
 761 err_iounmap:
 762         iounmap(ctx->regs);
 763
 764         return ret;
 765 }
 766
 767 static int decon_remove(struct platform_device *pdev)
 768 {
 769         struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
 770
 771         pm_runtime_disable(&pdev->dev);
 772
 773         iounmap(ctx->regs);
 774
 775         component_del(&pdev->dev, &decon_component_ops);
 776
 777         return 0;
 778 }
 779
 780 #ifdef CONFIG_PM
 781 static int exynos7_decon_suspend(struct device *dev)
 782 {
 783         struct decon_context *ctx = dev_get_drvdata(dev);
 784
 785         clk_disable_unprepare(ctx->vclk);
 786         clk_disable_unprepare(ctx->eclk);
 787         clk_disable_unprepare(ctx->aclk);
 788         clk_disable_unprepare(ctx->pclk);
 789
 790         return 0;
 791 }
 792
 793 static int exynos7_decon_resume(struct device *dev)
 794 {
 795         struct decon_context *ctx = dev_get_drvdata(dev);
 796         int ret;
 797
 798         ret = clk_prepare_enable(ctx->pclk);
 799         if (ret < 0) {
 800                 DRM_DEV_ERROR(dev, "Failed to prepare_enable the pclk [%d]\n",
 801                               ret);
 802                 return ret;
 803         }
 804
 805         ret = clk_prepare_enable(ctx->aclk);
 806         if (ret < 0) {
 807                 DRM_DEV_ERROR(dev, "Failed to prepare_enable the aclk [%d]\n",
 808                               ret);
 809                 return ret;
 810         }
 811
 812         ret = clk_prepare_enable(ctx->eclk);
 813         if  (ret < 0) {
 814                 DRM_DEV_ERROR(dev, "Failed to prepare_enable the eclk [%d]\n",
 815                               ret);
 816                 return ret;
 817         }
 818
 819         ret = clk_prepare_enable(ctx->vclk);
 820         if  (ret < 0) {
 821                 DRM_DEV_ERROR(dev, "Failed to prepare_enable the vclk [%d]\n",
 822                               ret);
 823                 return ret;
 824         }
 825
 826         return 0;
 827 }
 828 #endif
 829
 830 static const struct dev_pm_ops exynos7_decon_pm_ops = {
 831         SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume,
 832                            NULL)
 833         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 834                                 pm_runtime_force_resume)
 835 };
 836
 837 struct platform_driver decon_driver = {
 838         .probe          = decon_probe,
 839         .remove         = decon_remove,
 840         .driver         = {
 841                 .name   = "exynos-decon",
 842                 .pm     = &exynos7_decon_pm_ops,
 843                 .of_match_table = decon_driver_dt_match,
 844         },
 845 };