drivers/gpu/drm/exynos/exynos7_drm_decon.c

   1 /* drivers/gpu/drm/exynos/exynos7_drm_decon.c
   2  *
   3  * Copyright (C) 2014 Samsung Electronics Co.Ltd
   4  * Authors:
   5  *      Akshu Agarwal <akshua@gmail.com>
   6  *      Ajay Kumar <ajaykumar.rs@samsung.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  *
  13  */
  14 #include <drm/drmP.h>
  15 #include <drm/exynos_drm.h>
  16
  17 #include <linux/clk.h>
  18 #include <linux/component.h>
  19 #include <linux/kernel.h>
  20 #include <linux/of.h>
  21 #include <linux/of_address.h>
  22 #include <linux/of_device.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/pm_runtime.h>
  25
  26 #include <video/of_display_timing.h>
  27 #include <video/of_videomode.h>
  28 #include <video/exynos7_decon.h>
  29
  30 #include "exynos_drm_crtc.h"
  31 #include "exynos_drm_plane.h"
  32 #include "exynos_drm_drv.h"
  33 #include "exynos_drm_fb.h"
  34 #include "exynos_drm_iommu.h"
  35
  36 /*
  37  * DECON stands for Display and Enhancement controller.
  38  */
  39
  40 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
  41
  42 #define WINDOWS_NR      2
  43
  44 struct decon_context {
  45         struct device                   *dev;
  46         struct drm_device               *drm_dev;
  47         struct exynos_drm_crtc          *crtc;
  48         struct exynos_drm_plane         planes[WINDOWS_NR];
  49         struct exynos_drm_plane_config  configs[WINDOWS_NR];
  50         struct clk                      *pclk;
  51         struct clk                      *aclk;
  52         struct clk                      *eclk;
  53         struct clk                      *vclk;
  54         void __iomem                    *regs;
  55         unsigned long                   irq_flags;
  56         bool                            i80_if;
  57         bool                            suspended;
  58         int                             pipe;
  59         wait_queue_head_t               wait_vsync_queue;
  60         atomic_t                        wait_vsync_event;
  61
  62         struct drm_encoder *encoder;
  63 };
  64
  65 static const struct of_device_id decon_driver_dt_match[] = {
  66         {.compatible = "samsung,exynos7-decon"},
  67         {},
  68 };
  69 MODULE_DEVICE_TABLE(of, decon_driver_dt_match);
  70
  71 static const uint32_t decon_formats[] = {
  72         DRM_FORMAT_RGB565,
  73         DRM_FORMAT_XRGB8888,
  74         DRM_FORMAT_XBGR8888,
  75         DRM_FORMAT_RGBX8888,
  76         DRM_FORMAT_BGRX8888,
  77         DRM_FORMAT_ARGB8888,
  78         DRM_FORMAT_ABGR8888,
  79         DRM_FORMAT_RGBA8888,
  80         DRM_FORMAT_BGRA8888,
  81 };
  82
  83 static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
  84         DRM_PLANE_TYPE_PRIMARY,
  85         DRM_PLANE_TYPE_CURSOR,
  86 };
  87
  88 static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
  89 {
  90         struct decon_context *ctx = crtc->ctx;
  91
  92         if (ctx->suspended)
  93                 return;
  94
  95         atomic_set(&ctx->wait_vsync_event, 1);
  96
  97         /*
  98          * wait for DECON to signal VSYNC interrupt or return after
  99          * timeout which is set to 50ms (refresh rate of 20).
 100          */
 101         if (!wait_event_timeout(ctx->wait_vsync_queue,
 102                                 !atomic_read(&ctx->wait_vsync_event),
 103                                 HZ/20))
 104                 DRM_DEBUG_KMS("vblank wait timed out.\n");
 105 }
 106
 107 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
 108 {
 109         struct decon_context *ctx = crtc->ctx;
 110         unsigned int win, ch_enabled = 0;
 111
 112         DRM_DEBUG_KMS("%s\n", __FILE__);
 113
 114         /* Check if any channel is enabled. */
 115         for (win = 0; win < WINDOWS_NR; win++) {
 116                 u32 val = readl(ctx->regs + WINCON(win));
 117
 118                 if (val & WINCONx_ENWIN) {
 119                         val &= ~WINCONx_ENWIN;
 120                         writel(val, ctx->regs + WINCON(win));
 121                         ch_enabled = 1;
 122                 }
 123         }
 124
 125         /* Wait for vsync, as disable channel takes effect at next vsync */
 126         if (ch_enabled)
 127                 decon_wait_for_vblank(ctx->crtc);
 128 }
 129
 130 static int decon_ctx_initialize(struct decon_context *ctx,
 131                         struct drm_device *drm_dev)
 132 {
 133         struct exynos_drm_private *priv = drm_dev->dev_private;
 134         int ret;
 135
 136         ctx->drm_dev = drm_dev;
 137         ctx->pipe = priv->pipe++;
 138
 139         decon_clear_channels(ctx->crtc);
 140
 141         ret = drm_iommu_attach_device(drm_dev, ctx->dev);
 142         if (ret)
 143                 priv->pipe--;
 144
 145         return ret;
 146 }
 147
 148 static void decon_ctx_remove(struct decon_context *ctx)
 149 {
 150         /* detach this sub driver from iommu mapping if supported. */
 151         drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
 152 }
 153
 154 static u32 decon_calc_clkdiv(struct decon_context *ctx,
 155                 const struct drm_display_mode *mode)
 156 {
 157         unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
 158         u32 clkdiv;
 159
 160         /* Find the clock divider value that gets us closest to ideal_clk */
 161         clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);
 162
 163         return (clkdiv < 0x100) ? clkdiv : 0xff;
 164 }
 165
 166 static void decon_commit(struct exynos_drm_crtc *crtc)
 167 {
 168         struct decon_context *ctx = crtc->ctx;
 169         struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
 170         u32 val, clkdiv;
 171
 172         if (ctx->suspended)
 173                 return;
 174
 175         /* nothing to do if we haven't set the mode yet */
 176         if (mode->htotal == 0 || mode->vtotal == 0)
 177                 return;
 178
 179         if (!ctx->i80_if) {
 180                 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
 181               /* setup vertical timing values. */
 182                 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
 183                 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
 184                 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
 185
 186                 val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);
 187                 writel(val, ctx->regs + VIDTCON0);
 188
 189                 val = VIDTCON1_VSPW(vsync_len - 1);
 190                 writel(val, ctx->regs + VIDTCON1);
 191
 192                 /* setup horizontal timing values.  */
 193                 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
 194                 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
 195                 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
 196
 197                 /* setup horizontal timing values.  */
 198                 val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);
 199                 writel(val, ctx->regs + VIDTCON2);
 200
 201                 val = VIDTCON3_HSPW(hsync_len - 1);
 202                 writel(val, ctx->regs + VIDTCON3);
 203         }
 204
 205         /* setup horizontal and vertical display size. */
 206         val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |
 207                VIDTCON4_HOZVAL(mode->hdisplay - 1);
 208         writel(val, ctx->regs + VIDTCON4);
 209
 210         writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);
 211
 212         /*
 213          * fields of register with prefix '_F' would be updated
 214          * at vsync(same as dma start)
 215          */
 216         val = VIDCON0_ENVID | VIDCON0_ENVID_F;
 217         writel(val, ctx->regs + VIDCON0);
 218
 219         clkdiv = decon_calc_clkdiv(ctx, mode);
 220         if (clkdiv > 1) {
 221                 val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);
 222                 writel(val, ctx->regs + VCLKCON1);
 223                 writel(val, ctx->regs + VCLKCON2);
 224         }
 225
 226         val = readl(ctx->regs + DECON_UPDATE);
 227         val |= DECON_UPDATE_STANDALONE_F;
 228         writel(val, ctx->regs + DECON_UPDATE);
 229 }
 230
 231 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
 232 {
 233         struct decon_context *ctx = crtc->ctx;
 234         u32 val;
 235
 236         if (ctx->suspended)
 237                 return -EPERM;
 238
 239         if (!test_and_set_bit(0, &ctx->irq_flags)) {
 240                 val = readl(ctx->regs + VIDINTCON0);
 241
 242                 val |= VIDINTCON0_INT_ENABLE;
 243
 244                 if (!ctx->i80_if) {
 245                         val |= VIDINTCON0_INT_FRAME;
 246                         val &= ~VIDINTCON0_FRAMESEL0_MASK;
 247                         val |= VIDINTCON0_FRAMESEL0_VSYNC;
 248                 }
 249
 250                 writel(val, ctx->regs + VIDINTCON0);
 251         }
 252
 253         return 0;
 254 }
 255
 256 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
 257 {
 258         struct decon_context *ctx = crtc->ctx;
 259         u32 val;
 260
 261         if (ctx->suspended)
 262                 return;
 263
 264         if (test_and_clear_bit(0, &ctx->irq_flags)) {
 265                 val = readl(ctx->regs + VIDINTCON0);
 266
 267                 val &= ~VIDINTCON0_INT_ENABLE;
 268                 if (!ctx->i80_if)
 269                         val &= ~VIDINTCON0_INT_FRAME;
 270
 271                 writel(val, ctx->regs + VIDINTCON0);
 272         }
 273 }
 274
 275 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
 276                                  struct drm_framebuffer *fb)
 277 {
 278         unsigned long val;
 279         int padding;
 280
 281         val = readl(ctx->regs + WINCON(win));
 282         val &= ~WINCONx_BPPMODE_MASK;
 283
 284         switch (fb->pixel_format) {
 285         case DRM_FORMAT_RGB565:
 286                 val |= WINCONx_BPPMODE_16BPP_565;
 287                 val |= WINCONx_BURSTLEN_16WORD;
 288                 break;
 289         case DRM_FORMAT_XRGB8888:
 290                 val |= WINCONx_BPPMODE_24BPP_xRGB;
 291                 val |= WINCONx_BURSTLEN_16WORD;
 292                 break;
 293         case DRM_FORMAT_XBGR8888:
 294                 val |= WINCONx_BPPMODE_24BPP_xBGR;
 295                 val |= WINCONx_BURSTLEN_16WORD;
 296                 break;
 297         case DRM_FORMAT_RGBX8888:
 298                 val |= WINCONx_BPPMODE_24BPP_RGBx;
 299                 val |= WINCONx_BURSTLEN_16WORD;
 300                 break;
 301         case DRM_FORMAT_BGRX8888:
 302                 val |= WINCONx_BPPMODE_24BPP_BGRx;
 303                 val |= WINCONx_BURSTLEN_16WORD;
 304                 break;
 305         case DRM_FORMAT_ARGB8888:
 306                 val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX |
 307                         WINCONx_ALPHA_SEL;
 308                 val |= WINCONx_BURSTLEN_16WORD;
 309                 break;
 310         case DRM_FORMAT_ABGR8888:
 311                 val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX |
 312                         WINCONx_ALPHA_SEL;
 313                 val |= WINCONx_BURSTLEN_16WORD;
 314                 break;
 315         case DRM_FORMAT_RGBA8888:
 316                 val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX |
 317                         WINCONx_ALPHA_SEL;
 318                 val |= WINCONx_BURSTLEN_16WORD;
 319                 break;
 320         case DRM_FORMAT_BGRA8888:
 321                 val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX |
 322                         WINCONx_ALPHA_SEL;
 323                 val |= WINCONx_BURSTLEN_16WORD;
 324                 break;
 325         default:
 326                 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
 327
 328                 val |= WINCONx_BPPMODE_24BPP_xRGB;
 329                 val |= WINCONx_BURSTLEN_16WORD;
 330                 break;
 331         }
 332
 333         DRM_DEBUG_KMS("bpp = %d\n", fb->bits_per_pixel);
 334
 335         /*
 336          * In case of exynos, setting dma-burst to 16Word causes permanent
 337          * tearing for very small buffers, e.g. cursor buffer. Burst Mode
 338          * switching which is based on plane size is not recommended as
 339          * plane size varies a lot towards the end of the screen and rapid
 340          * movement causes unstable DMA which results into iommu crash/tear.
 341          */
 342
 343         padding = (fb->pitches[0] / (fb->bits_per_pixel >> 3)) - fb->width;
 344         if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {
 345                 val &= ~WINCONx_BURSTLEN_MASK;
 346                 val |= WINCONx_BURSTLEN_8WORD;
 347         }
 348
 349         writel(val, ctx->regs + WINCON(win));
 350 }
 351
 352 static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
 353 {
 354         unsigned int keycon0 = 0, keycon1 = 0;
 355
 356         keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
 357                         WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
 358
 359         keycon1 = WxKEYCON1_COLVAL(0xffffffff);
 360
 361         writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
 362         writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
 363 }
 364
 365 /**
 366  * shadow_protect_win() - disable updating values from shadow registers at vsync
 367  *
 368  * @win: window to protect registers for
 369  * @protect: 1 to protect (disable updates)
 370  */
 371 static void decon_shadow_protect_win(struct decon_context *ctx,
 372                                      unsigned int win, bool protect)
 373 {
 374         u32 bits, val;
 375
 376         bits = SHADOWCON_WINx_PROTECT(win);
 377
 378         val = readl(ctx->regs + SHADOWCON);
 379         if (protect)
 380                 val |= bits;
 381         else
 382                 val &= ~bits;
 383         writel(val, ctx->regs + SHADOWCON);
 384 }
 385
 386 static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
 387 {
 388         struct decon_context *ctx = crtc->ctx;
 389         int i;
 390
 391         if (ctx->suspended)
 392                 return;
 393
 394         for (i = 0; i < WINDOWS_NR; i++)
 395                 decon_shadow_protect_win(ctx, i, true);
 396 }
 397
 398 static void decon_update_plane(struct exynos_drm_crtc *crtc,
 399                                struct exynos_drm_plane *plane)
 400 {
 401         struct exynos_drm_plane_state *state =
 402                                 to_exynos_plane_state(plane->base.state);
 403         struct decon_context *ctx = crtc->ctx;
 404         struct drm_framebuffer *fb = state->base.fb;
 405         int padding;
 406         unsigned long val, alpha;
 407         unsigned int last_x;
 408         unsigned int last_y;
 409         unsigned int win = plane->index;
 410         unsigned int bpp = fb->bits_per_pixel >> 3;
 411         unsigned int pitch = fb->pitches[0];
 412
 413         if (ctx->suspended)
 414                 return;
 415
 416         /*
 417          * SHADOWCON/PRTCON register is used for enabling timing.
 418          *
 419          * for example, once only width value of a register is set,
 420          * if the dma is started then decon hardware could malfunction so
 421          * with protect window setting, the register fields with prefix '_F'
 422          * wouldn't be updated at vsync also but updated once unprotect window
 423          * is set.
 424          */
 425
 426         /* buffer start address */
 427         val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0);
 428         writel(val, ctx->regs + VIDW_BUF_START(win));
 429
 430         padding = (pitch / bpp) - fb->width;
 431
 432         /* buffer size */
 433         writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));
 434         writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win));
 435
 436         /* offset from the start of the buffer to read */
 437         writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win));
 438         writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win));
 439
 440         DRM_DEBUG_KMS("start addr = 0x%lx\n",
 441                         (unsigned long)val);
 442         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 443                         state->crtc.w, state->crtc.h);
 444
 445         val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
 446                 VIDOSDxA_TOPLEFT_Y(state->crtc.y);
 447         writel(val, ctx->regs + VIDOSD_A(win));
 448
 449         last_x = state->crtc.x + state->crtc.w;
 450         if (last_x)
 451                 last_x--;
 452         last_y = state->crtc.y + state->crtc.h;
 453         if (last_y)
 454                 last_y--;
 455
 456         val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y);
 457
 458         writel(val, ctx->regs + VIDOSD_B(win));
 459
 460         DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
 461                         state->crtc.x, state->crtc.y, last_x, last_y);
 462
 463         /* OSD alpha */
 464         alpha = VIDOSDxC_ALPHA0_R_F(0x0) |
 465                         VIDOSDxC_ALPHA0_G_F(0x0) |
 466                         VIDOSDxC_ALPHA0_B_F(0x0);
 467
 468         writel(alpha, ctx->regs + VIDOSD_C(win));
 469
 470         alpha = VIDOSDxD_ALPHA1_R_F(0xff) |
 471                         VIDOSDxD_ALPHA1_G_F(0xff) |
 472                         VIDOSDxD_ALPHA1_B_F(0xff);
 473
 474         writel(alpha, ctx->regs + VIDOSD_D(win));
 475
 476         decon_win_set_pixfmt(ctx, win, fb);
 477
 478         /* hardware window 0 doesn't support color key. */
 479         if (win != 0)
 480                 decon_win_set_colkey(ctx, win);
 481
 482         /* wincon */
 483         val = readl(ctx->regs + WINCON(win));
 484         val |= WINCONx_TRIPLE_BUF_MODE;
 485         val |= WINCONx_ENWIN;
 486         writel(val, ctx->regs + WINCON(win));
 487
 488         /* Enable DMA channel and unprotect windows */
 489         decon_shadow_protect_win(ctx, win, false);
 490
 491         val = readl(ctx->regs + DECON_UPDATE);
 492         val |= DECON_UPDATE_STANDALONE_F;
 493         writel(val, ctx->regs + DECON_UPDATE);
 494 }
 495
 496 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
 497                                 struct exynos_drm_plane *plane)
 498 {
 499         struct decon_context *ctx = crtc->ctx;
 500         unsigned int win = plane->index;
 501         u32 val;
 502
 503         if (ctx->suspended)
 504                 return;
 505
 506         /* protect windows */
 507         decon_shadow_protect_win(ctx, win, true);
 508
 509         /* wincon */
 510         val = readl(ctx->regs + WINCON(win));
 511         val &= ~WINCONx_ENWIN;
 512         writel(val, ctx->regs + WINCON(win));
 513
 514         val = readl(ctx->regs + DECON_UPDATE);
 515         val |= DECON_UPDATE_STANDALONE_F;
 516         writel(val, ctx->regs + DECON_UPDATE);
 517 }
 518
 519 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
 520 {
 521         struct decon_context *ctx = crtc->ctx;
 522         int i;
 523
 524         if (ctx->suspended)
 525                 return;
 526
 527         for (i = 0; i < WINDOWS_NR; i++)
 528                 decon_shadow_protect_win(ctx, i, false);
 529 }
 530
 531 static void decon_init(struct decon_context *ctx)
 532 {
 533         u32 val;
 534
 535         writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);
 536
 537         val = VIDOUTCON0_DISP_IF_0_ON;
 538         if (!ctx->i80_if)
 539                 val |= VIDOUTCON0_RGBIF;
 540         writel(val, ctx->regs + VIDOUTCON0);
 541
 542         writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);
 543
 544         if (!ctx->i80_if)
 545                 writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));
 546 }
 547
 548 static void decon_enable(struct exynos_drm_crtc *crtc)
 549 {
 550         struct decon_context *ctx = crtc->ctx;
 551
 552         if (!ctx->suspended)
 553                 return;
 554
 555         pm_runtime_get_sync(ctx->dev);
 556
 557         decon_init(ctx);
 558
 559         /* if vblank was enabled status, enable it again. */
 560         if (test_and_clear_bit(0, &ctx->irq_flags))
 561                 decon_enable_vblank(ctx->crtc);
 562
 563         decon_commit(ctx->crtc);
 564
 565         ctx->suspended = false;
 566 }
 567
 568 static void decon_disable(struct exynos_drm_crtc *crtc)
 569 {
 570         struct decon_context *ctx = crtc->ctx;
 571         int i;
 572
 573         if (ctx->suspended)
 574                 return;
 575
 576         /*
 577          * We need to make sure that all windows are disabled before we
 578          * suspend that connector. Otherwise we might try to scan from
 579          * a destroyed buffer later.
 580          */
 581         for (i = 0; i < WINDOWS_NR; i++)
 582                 decon_disable_plane(crtc, &ctx->planes[i]);
 583
 584         pm_runtime_put_sync(ctx->dev);
 585
 586         ctx->suspended = true;
 587 }
 588
 589 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
 590         .enable = decon_enable,
 591         .disable = decon_disable,
 592         .commit = decon_commit,
 593         .enable_vblank = decon_enable_vblank,
 594         .disable_vblank = decon_disable_vblank,
 595         .atomic_begin = decon_atomic_begin,
 596         .update_plane = decon_update_plane,
 597         .disable_plane = decon_disable_plane,
 598         .atomic_flush = decon_atomic_flush,
 599 };
 600
 601
 602 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
 603 {
 604         struct decon_context *ctx = (struct decon_context *)dev_id;
 605         u32 val, clear_bit;
 606         int win;
 607
 608         val = readl(ctx->regs + VIDINTCON1);
 609
 610         clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
 611         if (val & clear_bit)
 612                 writel(clear_bit, ctx->regs + VIDINTCON1);
 613
 614         /* check the crtc is detached already from encoder */
 615         if (ctx->pipe < 0 || !ctx->drm_dev)
 616                 goto out;
 617
 618         if (!ctx->i80_if) {
 619                 drm_crtc_handle_vblank(&ctx->crtc->base);
 620                 for (win = 0 ; win < WINDOWS_NR ; win++) {
 621                         struct exynos_drm_plane *plane = &ctx->planes[win];
 622
 623                         if (!plane->pending_fb)
 624                                 continue;
 625
 626                         exynos_drm_crtc_finish_update(ctx->crtc, plane);
 627                 }
 628
 629                 /* set wait vsync event to zero and wake up queue. */
 630                 if (atomic_read(&ctx->wait_vsync_event)) {
 631                         atomic_set(&ctx->wait_vsync_event, 0);
 632                         wake_up(&ctx->wait_vsync_queue);
 633                 }
 634         }
 635 out:
 636         return IRQ_HANDLED;
 637 }
 638
 639 static int decon_bind(struct device *dev, struct device *master, void *data)
 640 {
 641         struct decon_context *ctx = dev_get_drvdata(dev);
 642         struct drm_device *drm_dev = data;
 643         struct exynos_drm_plane *exynos_plane;
 644         unsigned int i;
 645         int ret;
 646
 647         ret = decon_ctx_initialize(ctx, drm_dev);
 648         if (ret) {
 649                 DRM_ERROR("decon_ctx_initialize failed.\n");
 650                 return ret;
 651         }
 652
 653         for (i = 0; i < WINDOWS_NR; i++) {
 654                 ctx->configs[i].pixel_formats = decon_formats;
 655                 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats);
 656                 ctx->configs[i].zpos = i;
 657                 ctx->configs[i].type = decon_win_types[i];
 658
 659                 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
 660                                         1 << ctx->pipe, &ctx->configs[i]);
 661                 if (ret)
 662                         return ret;
 663         }
 664
 665         exynos_plane = &ctx->planes[DEFAULT_WIN];
 666         ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
 667                                            ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
 668                                            &decon_crtc_ops, ctx);
 669         if (IS_ERR(ctx->crtc)) {
 670                 decon_ctx_remove(ctx);
 671                 return PTR_ERR(ctx->crtc);
 672         }
 673
 674         if (ctx->encoder)
 675                 exynos_dpi_bind(drm_dev, ctx->encoder);
 676
 677         return 0;
 678
 679 }
 680
 681 static void decon_unbind(struct device *dev, struct device *master,
 682                         void *data)
 683 {
 684         struct decon_context *ctx = dev_get_drvdata(dev);
 685
 686         decon_disable(ctx->crtc);
 687
 688         if (ctx->encoder)
 689                 exynos_dpi_remove(ctx->encoder);
 690
 691         decon_ctx_remove(ctx);
 692 }
 693
 694 static const struct component_ops decon_component_ops = {
 695         .bind   = decon_bind,
 696         .unbind = decon_unbind,
 697 };
 698
 699 static int decon_probe(struct platform_device *pdev)
 700 {
 701         struct device *dev = &pdev->dev;
 702         struct decon_context *ctx;
 703         struct device_node *i80_if_timings;
 704         struct resource *res;
 705         int ret;
 706
 707         if (!dev->of_node)
 708                 return -ENODEV;
 709
 710         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 711         if (!ctx)
 712                 return -ENOMEM;
 713
 714         ctx->dev = dev;
 715         ctx->suspended = true;
 716
 717         i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
 718         if (i80_if_timings)
 719                 ctx->i80_if = true;
 720         of_node_put(i80_if_timings);
 721
 722         ctx->regs = of_iomap(dev->of_node, 0);
 723         if (!ctx->regs)
 724                 return -ENOMEM;
 725
 726         ctx->pclk = devm_clk_get(dev, "pclk_decon0");
 727         if (IS_ERR(ctx->pclk)) {
 728                 dev_err(dev, "failed to get bus clock pclk\n");
 729                 ret = PTR_ERR(ctx->pclk);
 730                 goto err_iounmap;
 731         }
 732
 733         ctx->aclk = devm_clk_get(dev, "aclk_decon0");
 734         if (IS_ERR(ctx->aclk)) {
 735                 dev_err(dev, "failed to get bus clock aclk\n");
 736                 ret = PTR_ERR(ctx->aclk);
 737                 goto err_iounmap;
 738         }
 739
 740         ctx->eclk = devm_clk_get(dev, "decon0_eclk");
 741         if (IS_ERR(ctx->eclk)) {
 742                 dev_err(dev, "failed to get eclock\n");
 743                 ret = PTR_ERR(ctx->eclk);
 744                 goto err_iounmap;
 745         }
 746
 747         ctx->vclk = devm_clk_get(dev, "decon0_vclk");
 748         if (IS_ERR(ctx->vclk)) {
 749                 dev_err(dev, "failed to get vclock\n");
 750                 ret = PTR_ERR(ctx->vclk);
 751                 goto err_iounmap;
 752         }
 753
 754         res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
 755                                            ctx->i80_if ? "lcd_sys" : "vsync");
 756         if (!res) {
 757                 dev_err(dev, "irq request failed.\n");
 758                 ret = -ENXIO;
 759                 goto err_iounmap;
 760         }
 761
 762         ret = devm_request_irq(dev, res->start, decon_irq_handler,
 763                                                         0, "drm_decon", ctx);
 764         if (ret) {
 765                 dev_err(dev, "irq request failed.\n");
 766                 goto err_iounmap;
 767         }
 768
 769         init_waitqueue_head(&ctx->wait_vsync_queue);
 770         atomic_set(&ctx->wait_vsync_event, 0);
 771
 772         platform_set_drvdata(pdev, ctx);
 773
 774         ctx->encoder = exynos_dpi_probe(dev);
 775         if (IS_ERR(ctx->encoder)) {
 776                 ret = PTR_ERR(ctx->encoder);
 777                 goto err_iounmap;
 778         }
 779
 780         pm_runtime_enable(dev);
 781
 782         ret = component_add(dev, &decon_component_ops);
 783         if (ret)
 784                 goto err_disable_pm_runtime;
 785
 786         return ret;
 787
 788 err_disable_pm_runtime:
 789         pm_runtime_disable(dev);
 790
 791 err_iounmap:
 792         iounmap(ctx->regs);
 793
 794         return ret;
 795 }
 796
 797 static int decon_remove(struct platform_device *pdev)
 798 {
 799         struct decon_context *ctx = dev_get_drvdata(&pdev->dev);
 800
 801         pm_runtime_disable(&pdev->dev);
 802
 803         iounmap(ctx->regs);
 804
 805         component_del(&pdev->dev, &decon_component_ops);
 806
 807         return 0;
 808 }
 809
 810 #ifdef CONFIG_PM
 811 static int exynos7_decon_suspend(struct device *dev)
 812 {
 813         struct decon_context *ctx = dev_get_drvdata(dev);
 814
 815         clk_disable_unprepare(ctx->vclk);
 816         clk_disable_unprepare(ctx->eclk);
 817         clk_disable_unprepare(ctx->aclk);
 818         clk_disable_unprepare(ctx->pclk);
 819
 820         return 0;
 821 }
 822
 823 static int exynos7_decon_resume(struct device *dev)
 824 {
 825         struct decon_context *ctx = dev_get_drvdata(dev);
 826         int ret;
 827
 828         ret = clk_prepare_enable(ctx->pclk);
 829         if (ret < 0) {
 830                 DRM_ERROR("Failed to prepare_enable the pclk [%d]\n", ret);
 831                 return ret;
 832         }
 833
 834         ret = clk_prepare_enable(ctx->aclk);
 835         if (ret < 0) {
 836                 DRM_ERROR("Failed to prepare_enable the aclk [%d]\n", ret);
 837                 return ret;
 838         }
 839
 840         ret = clk_prepare_enable(ctx->eclk);
 841         if  (ret < 0) {
 842                 DRM_ERROR("Failed to prepare_enable the eclk [%d]\n", ret);
 843                 return ret;
 844         }
 845
 846         ret = clk_prepare_enable(ctx->vclk);
 847         if  (ret < 0) {
 848                 DRM_ERROR("Failed to prepare_enable the vclk [%d]\n", ret);
 849                 return ret;
 850         }
 851
 852         return 0;
 853 }
 854 #endif
 855
 856 static const struct dev_pm_ops exynos7_decon_pm_ops = {
 857         SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume,
 858                            NULL)
 859 };
 860
 861 struct platform_driver decon_driver = {
 862         .probe          = decon_probe,
 863         .remove         = decon_remove,
 864         .driver         = {
 865                 .name   = "exynos-decon",
 866                 .pm     = &exynos7_decon_pm_ops,
 867                 .of_match_table = decon_driver_dt_match,
 868         },
 869 };