drivers/gpu/drm/tegra/dc.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   3  * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/reset.h>
  13
  14 #include "dc.h"
  15 #include "drm.h"
  16 #include "gem.h"
  17
  18 struct tegra_dc_soc_info {
  19         bool supports_interlacing;
  20         bool supports_cursor;
  21         bool supports_block_linear;
  22         unsigned int pitch_align;
  23 };
  24
  25 struct tegra_plane {
  26         struct drm_plane base;
  27         unsigned int index;
  28 };
  29
  30 static inline struct tegra_plane *to_tegra_plane(struct drm_plane *plane)
  31 {
  32         return container_of(plane, struct tegra_plane, base);
  33 }
  34
  35 static unsigned int tegra_dc_format(uint32_t format, uint32_t *swap)
  36 {
  37         /* assume no swapping of fetched data */
  38         if (swap)
  39                 *swap = BYTE_SWAP_NOSWAP;
  40
  41         switch (format) {
  42         case DRM_FORMAT_XBGR8888:
  43                 return WIN_COLOR_DEPTH_R8G8B8A8;
  44
  45         case DRM_FORMAT_XRGB8888:
  46                 return WIN_COLOR_DEPTH_B8G8R8A8;
  47
  48         case DRM_FORMAT_RGB565:
  49                 return WIN_COLOR_DEPTH_B5G6R5;
  50
  51         case DRM_FORMAT_UYVY:
  52                 return WIN_COLOR_DEPTH_YCbCr422;
  53
  54         case DRM_FORMAT_YUYV:
  55                 if (swap)
  56                         *swap = BYTE_SWAP_SWAP2;
  57
  58                 return WIN_COLOR_DEPTH_YCbCr422;
  59
  60         case DRM_FORMAT_YUV420:
  61                 return WIN_COLOR_DEPTH_YCbCr420P;
  62
  63         case DRM_FORMAT_YUV422:
  64                 return WIN_COLOR_DEPTH_YCbCr422P;
  65
  66         default:
  67                 break;
  68         }
  69
  70         WARN(1, "unsupported pixel format %u, using default\n", format);
  71         return WIN_COLOR_DEPTH_B8G8R8A8;
  72 }
  73
  74 static bool tegra_dc_format_is_yuv(unsigned int format, bool *planar)
  75 {
  76         switch (format) {
  77         case WIN_COLOR_DEPTH_YCbCr422:
  78         case WIN_COLOR_DEPTH_YUV422:
  79                 if (planar)
  80                         *planar = false;
  81
  82                 return true;
  83
  84         case WIN_COLOR_DEPTH_YCbCr420P:
  85         case WIN_COLOR_DEPTH_YUV420P:
  86         case WIN_COLOR_DEPTH_YCbCr422P:
  87         case WIN_COLOR_DEPTH_YUV422P:
  88         case WIN_COLOR_DEPTH_YCbCr422R:
  89         case WIN_COLOR_DEPTH_YUV422R:
  90         case WIN_COLOR_DEPTH_YCbCr422RA:
  91         case WIN_COLOR_DEPTH_YUV422RA:
  92                 if (planar)
  93                         *planar = true;
  94
  95                 return true;
  96         }
  97
  98         return false;
  99 }
 100
 101 static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v,
 102                                   unsigned int bpp)
 103 {
 104         fixed20_12 outf = dfixed_init(out);
 105         fixed20_12 inf = dfixed_init(in);
 106         u32 dda_inc;
 107         int max;
 108
 109         if (v)
 110                 max = 15;
 111         else {
 112                 switch (bpp) {
 113                 case 2:
 114                         max = 8;
 115                         break;
 116
 117                 default:
 118                         WARN_ON_ONCE(1);
 119                         /* fallthrough */
 120                 case 4:
 121                         max = 4;
 122                         break;
 123                 }
 124         }
 125
 126         outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1));
 127         inf.full -= dfixed_const(1);
 128
 129         dda_inc = dfixed_div(inf, outf);
 130         dda_inc = min_t(u32, dda_inc, dfixed_const(max));
 131
 132         return dda_inc;
 133 }
 134
 135 static inline u32 compute_initial_dda(unsigned int in)
 136 {
 137         fixed20_12 inf = dfixed_init(in);
 138         return dfixed_frac(inf);
 139 }
 140
 141 static int tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index,
 142                                  const struct tegra_dc_window *window)
 143 {
 144         unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp;
 145         unsigned long value;
 146         bool yuv, planar;
 147
 148         /*
 149          * For YUV planar modes, the number of bytes per pixel takes into
 150          * account only the luma component and therefore is 1.
 151          */
 152         yuv = tegra_dc_format_is_yuv(window->format, &planar);
 153         if (!yuv)
 154                 bpp = window->bits_per_pixel / 8;
 155         else
 156                 bpp = planar ? 1 : 2;
 157
 158         value = WINDOW_A_SELECT << index;
 159         tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
 160
 161         tegra_dc_writel(dc, window->format, DC_WIN_COLOR_DEPTH);
 162         tegra_dc_writel(dc, window->swap, DC_WIN_BYTE_SWAP);
 163
 164         value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x);
 165         tegra_dc_writel(dc, value, DC_WIN_POSITION);
 166
 167         value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w);
 168         tegra_dc_writel(dc, value, DC_WIN_SIZE);
 169
 170         h_offset = window->src.x * bpp;
 171         v_offset = window->src.y;
 172         h_size = window->src.w * bpp;
 173         v_size = window->src.h;
 174
 175         value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size);
 176         tegra_dc_writel(dc, value, DC_WIN_PRESCALED_SIZE);
 177
 178         /*
 179          * For DDA computations the number of bytes per pixel for YUV planar
 180          * modes needs to take into account all Y, U and V components.
 181          */
 182         if (yuv && planar)
 183                 bpp = 2;
 184
 185         h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp);
 186         v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp);
 187
 188         value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda);
 189         tegra_dc_writel(dc, value, DC_WIN_DDA_INC);
 190
 191         h_dda = compute_initial_dda(window->src.x);
 192         v_dda = compute_initial_dda(window->src.y);
 193
 194         tegra_dc_writel(dc, h_dda, DC_WIN_H_INITIAL_DDA);
 195         tegra_dc_writel(dc, v_dda, DC_WIN_V_INITIAL_DDA);
 196
 197         tegra_dc_writel(dc, 0, DC_WIN_UV_BUF_STRIDE);
 198         tegra_dc_writel(dc, 0, DC_WIN_BUF_STRIDE);
 199
 200         tegra_dc_writel(dc, window->base[0], DC_WINBUF_START_ADDR);
 201
 202         if (yuv && planar) {
 203                 tegra_dc_writel(dc, window->base[1], DC_WINBUF_START_ADDR_U);
 204                 tegra_dc_writel(dc, window->base[2], DC_WINBUF_START_ADDR_V);
 205                 value = window->stride[1] << 16 | window->stride[0];
 206                 tegra_dc_writel(dc, value, DC_WIN_LINE_STRIDE);
 207         } else {
 208                 tegra_dc_writel(dc, window->stride[0], DC_WIN_LINE_STRIDE);
 209         }
 210
 211         if (window->bottom_up)
 212                 v_offset += window->src.h - 1;
 213
 214         tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
 215         tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
 216
 217         if (dc->soc->supports_block_linear) {
 218                 unsigned long height = window->tiling.value;
 219
 220                 switch (window->tiling.mode) {
 221                 case TEGRA_BO_TILING_MODE_PITCH:
 222                         value = DC_WINBUF_SURFACE_KIND_PITCH;
 223                         break;
 224
 225                 case TEGRA_BO_TILING_MODE_TILED:
 226                         value = DC_WINBUF_SURFACE_KIND_TILED;
 227                         break;
 228
 229                 case TEGRA_BO_TILING_MODE_BLOCK:
 230                         value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
 231                                 DC_WINBUF_SURFACE_KIND_BLOCK;
 232                         break;
 233                 }
 234
 235                 tegra_dc_writel(dc, value, DC_WINBUF_SURFACE_KIND);
 236         } else {
 237                 switch (window->tiling.mode) {
 238                 case TEGRA_BO_TILING_MODE_PITCH:
 239                         value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV |
 240                                 DC_WIN_BUFFER_ADDR_MODE_LINEAR;
 241                         break;
 242
 243                 case TEGRA_BO_TILING_MODE_TILED:
 244                         value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV |
 245                                 DC_WIN_BUFFER_ADDR_MODE_TILE;
 246                         break;
 247
 248                 case TEGRA_BO_TILING_MODE_BLOCK:
 249                         DRM_ERROR("hardware doesn't support block linear mode\n");
 250                         return -EINVAL;
 251                 }
 252
 253                 tegra_dc_writel(dc, value, DC_WIN_BUFFER_ADDR_MODE);
 254         }
 255
 256         value = WIN_ENABLE;
 257
 258         if (yuv) {
 259                 /* setup default colorspace conversion coefficients */
 260                 tegra_dc_writel(dc, 0x00f0, DC_WIN_CSC_YOF);
 261                 tegra_dc_writel(dc, 0x012a, DC_WIN_CSC_KYRGB);
 262                 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KUR);
 263                 tegra_dc_writel(dc, 0x0198, DC_WIN_CSC_KVR);
 264                 tegra_dc_writel(dc, 0x039b, DC_WIN_CSC_KUG);
 265                 tegra_dc_writel(dc, 0x032f, DC_WIN_CSC_KVG);
 266                 tegra_dc_writel(dc, 0x0204, DC_WIN_CSC_KUB);
 267                 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KVB);
 268
 269                 value |= CSC_ENABLE;
 270         } else if (window->bits_per_pixel < 24) {
 271                 value |= COLOR_EXPAND;
 272         }
 273
 274         if (window->bottom_up)
 275                 value |= V_DIRECTION;
 276
 277         tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
 278
 279         /*
 280          * Disable blending and assume Window A is the bottom-most window,
 281          * Window C is the top-most window and Window B is in the middle.
 282          */
 283         tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_NOKEY);
 284         tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_1WIN);
 285
 286         switch (index) {
 287         case 0:
 288                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_X);
 289                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
 290                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
 291                 break;
 292
 293         case 1:
 294                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
 295                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
 296                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
 297                 break;
 298
 299         case 2:
 300                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
 301                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_Y);
 302                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_3WIN_XY);
 303                 break;
 304         }
 305
 306         tegra_dc_writel(dc, WIN_A_UPDATE << index, DC_CMD_STATE_CONTROL);
 307         tegra_dc_writel(dc, WIN_A_ACT_REQ << index, DC_CMD_STATE_CONTROL);
 308
 309         return 0;
 310 }
 311
 312 static int tegra_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 313                               struct drm_framebuffer *fb, int crtc_x,
 314                               int crtc_y, unsigned int crtc_w,
 315                               unsigned int crtc_h, uint32_t src_x,
 316                               uint32_t src_y, uint32_t src_w, uint32_t src_h)
 317 {
 318         struct tegra_plane *p = to_tegra_plane(plane);
 319         struct tegra_dc *dc = to_tegra_dc(crtc);
 320         struct tegra_dc_window window;
 321         unsigned int i;
 322         int err;
 323
 324         memset(&window, 0, sizeof(window));
 325         window.src.x = src_x >> 16;
 326         window.src.y = src_y >> 16;
 327         window.src.w = src_w >> 16;
 328         window.src.h = src_h >> 16;
 329         window.dst.x = crtc_x;
 330         window.dst.y = crtc_y;
 331         window.dst.w = crtc_w;
 332         window.dst.h = crtc_h;
 333         window.format = tegra_dc_format(fb->pixel_format, &window.swap);
 334         window.bits_per_pixel = fb->bits_per_pixel;
 335         window.bottom_up = tegra_fb_is_bottom_up(fb);
 336
 337         err = tegra_fb_get_tiling(fb, &window.tiling);
 338         if (err < 0)
 339                 return err;
 340
 341         for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) {
 342                 struct tegra_bo *bo = tegra_fb_get_plane(fb, i);
 343
 344                 window.base[i] = bo->paddr + fb->offsets[i];
 345
 346                 /*
 347                  * Tegra doesn't support different strides for U and V planes
 348                  * so we display a warning if the user tries to display a
 349                  * framebuffer with such a configuration.
 350                  */
 351                 if (i >= 2) {
 352                         if (fb->pitches[i] != window.stride[1])
 353                                 DRM_ERROR("unsupported UV-plane configuration\n");
 354                 } else {
 355                         window.stride[i] = fb->pitches[i];
 356                 }
 357         }
 358
 359         return tegra_dc_setup_window(dc, p->index, &window);
 360 }
 361
 362 static int tegra_plane_disable(struct drm_plane *plane)
 363 {
 364         struct tegra_dc *dc = to_tegra_dc(plane->crtc);
 365         struct tegra_plane *p = to_tegra_plane(plane);
 366         unsigned long value;
 367
 368         if (!plane->crtc)
 369                 return 0;
 370
 371         value = WINDOW_A_SELECT << p->index;
 372         tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
 373
 374         value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
 375         value &= ~WIN_ENABLE;
 376         tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
 377
 378         tegra_dc_writel(dc, WIN_A_UPDATE << p->index, DC_CMD_STATE_CONTROL);
 379         tegra_dc_writel(dc, WIN_A_ACT_REQ << p->index, DC_CMD_STATE_CONTROL);
 380
 381         return 0;
 382 }
 383
 384 static void tegra_plane_destroy(struct drm_plane *plane)
 385 {
 386         struct tegra_plane *p = to_tegra_plane(plane);
 387
 388         tegra_plane_disable(plane);
 389         drm_plane_cleanup(plane);
 390         kfree(p);
 391 }
 392
 393 static const struct drm_plane_funcs tegra_plane_funcs = {
 394         .update_plane = tegra_plane_update,
 395         .disable_plane = tegra_plane_disable,
 396         .destroy = tegra_plane_destroy,
 397 };
 398
 399 static const uint32_t plane_formats[] = {
 400         DRM_FORMAT_XBGR8888,
 401         DRM_FORMAT_XRGB8888,
 402         DRM_FORMAT_RGB565,
 403         DRM_FORMAT_UYVY,
 404         DRM_FORMAT_YUYV,
 405         DRM_FORMAT_YUV420,
 406         DRM_FORMAT_YUV422,
 407 };
 408
 409 static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc)
 410 {
 411         unsigned int i;
 412         int err = 0;
 413
 414         for (i = 0; i < 2; i++) {
 415                 struct tegra_plane *plane;
 416
 417                 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 418                 if (!plane)
 419                         return -ENOMEM;
 420
 421                 plane->index = 1 + i;
 422
 423                 err = drm_plane_init(drm, &plane->base, 1 << dc->pipe,
 424                                      &tegra_plane_funcs, plane_formats,
 425                                      ARRAY_SIZE(plane_formats), false);
 426                 if (err < 0) {
 427                         kfree(plane);
 428                         return err;
 429                 }
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y,
 436                              struct drm_framebuffer *fb)
 437 {
 438         struct tegra_bo *bo = tegra_fb_get_plane(fb, 0);
 439         unsigned int h_offset = 0, v_offset = 0;
 440         struct tegra_bo_tiling tiling;
 441         unsigned int format, swap;
 442         unsigned long value;
 443         int err;
 444
 445         err = tegra_fb_get_tiling(fb, &tiling);
 446         if (err < 0)
 447                 return err;
 448
 449         tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER);
 450
 451         value = fb->offsets[0] + y * fb->pitches[0] +
 452                 x * fb->bits_per_pixel / 8;
 453
 454         tegra_dc_writel(dc, bo->paddr + value, DC_WINBUF_START_ADDR);
 455         tegra_dc_writel(dc, fb->pitches[0], DC_WIN_LINE_STRIDE);
 456
 457         format = tegra_dc_format(fb->pixel_format, &swap);
 458         tegra_dc_writel(dc, format, DC_WIN_COLOR_DEPTH);
 459         tegra_dc_writel(dc, swap, DC_WIN_BYTE_SWAP);
 460
 461         if (dc->soc->supports_block_linear) {
 462                 unsigned long height = tiling.value;
 463
 464                 switch (tiling.mode) {
 465                 case TEGRA_BO_TILING_MODE_PITCH:
 466                         value = DC_WINBUF_SURFACE_KIND_PITCH;
 467                         break;
 468
 469                 case TEGRA_BO_TILING_MODE_TILED:
 470                         value = DC_WINBUF_SURFACE_KIND_TILED;
 471                         break;
 472
 473                 case TEGRA_BO_TILING_MODE_BLOCK:
 474                         value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
 475                                 DC_WINBUF_SURFACE_KIND_BLOCK;
 476                         break;
 477                 }
 478
 479                 tegra_dc_writel(dc, value, DC_WINBUF_SURFACE_KIND);
 480         } else {
 481                 switch (tiling.mode) {
 482                 case TEGRA_BO_TILING_MODE_PITCH:
 483                         value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV |
 484                                 DC_WIN_BUFFER_ADDR_MODE_LINEAR;
 485                         break;
 486
 487                 case TEGRA_BO_TILING_MODE_TILED:
 488                         value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV |
 489                                 DC_WIN_BUFFER_ADDR_MODE_TILE;
 490                         break;
 491
 492                 case TEGRA_BO_TILING_MODE_BLOCK:
 493                         DRM_ERROR("hardware doesn't support block linear mode\n");
 494                         return -EINVAL;
 495                 }
 496
 497                 tegra_dc_writel(dc, value, DC_WIN_BUFFER_ADDR_MODE);
 498         }
 499
 500         /* make sure bottom-up buffers are properly displayed */
 501         if (tegra_fb_is_bottom_up(fb)) {
 502                 value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
 503                 value |= V_DIRECTION;
 504                 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
 505
 506                 v_offset += fb->height - 1;
 507         } else {
 508                 value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
 509                 value &= ~V_DIRECTION;
 510                 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
 511         }
 512
 513         tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
 514         tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
 515
 516         value = GENERAL_UPDATE | WIN_A_UPDATE;
 517         tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
 518
 519         value = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
 520         tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
 521
 522         return 0;
 523 }
 524
 525 void tegra_dc_enable_vblank(struct tegra_dc *dc)
 526 {
 527         unsigned long value, flags;
 528
 529         spin_lock_irqsave(&dc->lock, flags);
 530
 531         value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
 532         value |= VBLANK_INT;
 533         tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
 534
 535         spin_unlock_irqrestore(&dc->lock, flags);
 536 }
 537
 538 void tegra_dc_disable_vblank(struct tegra_dc *dc)
 539 {
 540         unsigned long value, flags;
 541
 542         spin_lock_irqsave(&dc->lock, flags);
 543
 544         value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
 545         value &= ~VBLANK_INT;
 546         tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
 547
 548         spin_unlock_irqrestore(&dc->lock, flags);
 549 }
 550
 551 static int tegra_dc_cursor_set2(struct drm_crtc *crtc, struct drm_file *file,
 552                                 uint32_t handle, uint32_t width,
 553                                 uint32_t height, int32_t hot_x, int32_t hot_y)
 554 {
 555         unsigned long value = CURSOR_CLIP_DISPLAY;
 556         struct tegra_dc *dc = to_tegra_dc(crtc);
 557         struct drm_gem_object *gem;
 558         struct tegra_bo *bo = NULL;
 559
 560         if (!dc->soc->supports_cursor)
 561                 return -ENXIO;
 562
 563         if (width != height)
 564                 return -EINVAL;
 565
 566         switch (width) {
 567         case 32:
 568                 value |= CURSOR_SIZE_32x32;
 569                 break;
 570
 571         case 64:
 572                 value |= CURSOR_SIZE_64x64;
 573                 break;
 574
 575         case 128:
 576                 value |= CURSOR_SIZE_128x128;
 577
 578         case 256:
 579                 value |= CURSOR_SIZE_256x256;
 580                 break;
 581
 582         default:
 583                 return -EINVAL;
 584         }
 585
 586         if (handle) {
 587                 gem = drm_gem_object_lookup(crtc->dev, file, handle);
 588                 if (!gem)
 589                         return -ENOENT;
 590
 591                 bo = to_tegra_bo(gem);
 592         }
 593
 594         if (bo) {
 595                 unsigned long addr = (bo->paddr & 0xfffffc00) >> 10;
 596 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
 597                 unsigned long high = (bo->paddr & 0xfffffffc) >> 32;
 598 #endif
 599
 600                 tegra_dc_writel(dc, value | addr, DC_DISP_CURSOR_START_ADDR);
 601
 602 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
 603                 tegra_dc_writel(dc, high, DC_DISP_CURSOR_START_ADDR_HI);
 604 #endif
 605
 606                 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
 607                 value |= CURSOR_ENABLE;
 608                 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
 609
 610                 value = tegra_dc_readl(dc, DC_DISP_BLEND_CURSOR_CONTROL);
 611                 value &= ~CURSOR_DST_BLEND_MASK;
 612                 value &= ~CURSOR_SRC_BLEND_MASK;
 613                 value |= CURSOR_MODE_NORMAL;
 614                 value |= CURSOR_DST_BLEND_NEG_K1_TIMES_SRC;
 615                 value |= CURSOR_SRC_BLEND_K1_TIMES_SRC;
 616                 value |= CURSOR_ALPHA;
 617                 tegra_dc_writel(dc, value, DC_DISP_BLEND_CURSOR_CONTROL);
 618         } else {
 619                 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
 620                 value &= ~CURSOR_ENABLE;
 621                 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
 622         }
 623
 624         tegra_dc_writel(dc, CURSOR_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
 625         tegra_dc_writel(dc, CURSOR_ACT_REQ, DC_CMD_STATE_CONTROL);
 626
 627         tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
 628         tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
 629
 630         return 0;
 631 }
 632
 633 static int tegra_dc_cursor_move(struct drm_crtc *crtc, int x, int y)
 634 {
 635         struct tegra_dc *dc = to_tegra_dc(crtc);
 636         unsigned long value;
 637
 638         if (!dc->soc->supports_cursor)
 639                 return -ENXIO;
 640
 641         value = ((y & 0x3fff) << 16) | (x & 0x3fff);
 642         tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION);
 643
 644         tegra_dc_writel(dc, CURSOR_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
 645         tegra_dc_writel(dc, CURSOR_ACT_REQ, DC_CMD_STATE_CONTROL);
 646
 647         /* XXX: only required on generations earlier than Tegra124? */
 648         tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
 649         tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
 650
 651         return 0;
 652 }
 653
 654 static void tegra_dc_finish_page_flip(struct tegra_dc *dc)
 655 {
 656         struct drm_device *drm = dc->base.dev;
 657         struct drm_crtc *crtc = &dc->base;
 658         unsigned long flags, base;
 659         struct tegra_bo *bo;
 660
 661         if (!dc->event)
 662                 return;
 663
 664         bo = tegra_fb_get_plane(crtc->primary->fb, 0);
 665
 666         /* check if new start address has been latched */
 667         tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
 668         base = tegra_dc_readl(dc, DC_WINBUF_START_ADDR);
 669         tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
 670
 671         if (base == bo->paddr + crtc->primary->fb->offsets[0]) {
 672                 spin_lock_irqsave(&drm->event_lock, flags);
 673                 drm_send_vblank_event(drm, dc->pipe, dc->event);
 674                 drm_vblank_put(drm, dc->pipe);
 675                 dc->event = NULL;
 676                 spin_unlock_irqrestore(&drm->event_lock, flags);
 677         }
 678 }
 679
 680 void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
 681 {
 682         struct tegra_dc *dc = to_tegra_dc(crtc);
 683         struct drm_device *drm = crtc->dev;
 684         unsigned long flags;
 685
 686         spin_lock_irqsave(&drm->event_lock, flags);
 687
 688         if (dc->event && dc->event->base.file_priv == file) {
 689                 dc->event->base.destroy(&dc->event->base);
 690                 drm_vblank_put(drm, dc->pipe);
 691                 dc->event = NULL;
 692         }
 693
 694         spin_unlock_irqrestore(&drm->event_lock, flags);
 695 }
 696
 697 static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 698                               struct drm_pending_vblank_event *event, uint32_t page_flip_flags)
 699 {
 700         struct tegra_dc *dc = to_tegra_dc(crtc);
 701         struct drm_device *drm = crtc->dev;
 702
 703         if (dc->event)
 704                 return -EBUSY;
 705
 706         if (event) {
 707                 event->pipe = dc->pipe;
 708                 dc->event = event;
 709                 drm_vblank_get(drm, dc->pipe);
 710         }
 711
 712         tegra_dc_set_base(dc, 0, 0, fb);
 713         crtc->primary->fb = fb;
 714
 715         return 0;
 716 }
 717
 718 static void drm_crtc_clear(struct drm_crtc *crtc)
 719 {
 720         memset(crtc, 0, sizeof(*crtc));
 721 }
 722
 723 static void tegra_dc_destroy(struct drm_crtc *crtc)
 724 {
 725         drm_crtc_cleanup(crtc);
 726         drm_crtc_clear(crtc);
 727 }
 728
 729 static const struct drm_crtc_funcs tegra_crtc_funcs = {
 730         .cursor_set2 = tegra_dc_cursor_set2,
 731         .cursor_move = tegra_dc_cursor_move,
 732         .page_flip = tegra_dc_page_flip,
 733         .set_config = drm_crtc_helper_set_config,
 734         .destroy = tegra_dc_destroy,
 735 };
 736
 737 static void tegra_crtc_disable(struct drm_crtc *crtc)
 738 {
 739         struct drm_device *drm = crtc->dev;
 740         struct drm_plane *plane;
 741
 742         drm_for_each_legacy_plane(plane, &drm->mode_config.plane_list) {
 743                 if (plane->crtc == crtc) {
 744                         tegra_plane_disable(plane);
 745                         plane->crtc = NULL;
 746
 747                         if (plane->fb) {
 748                                 drm_framebuffer_unreference(plane->fb);
 749                                 plane->fb = NULL;
 750                         }
 751                 }
 752         }
 753
 754         drm_crtc_vblank_off(crtc);
 755 }
 756
 757 static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc,
 758                                   const struct drm_display_mode *mode,
 759                                   struct drm_display_mode *adjusted)
 760 {
 761         return true;
 762 }
 763
 764 static int tegra_dc_set_timings(struct tegra_dc *dc,
 765                                 struct drm_display_mode *mode)
 766 {
 767         unsigned int h_ref_to_sync = 1;
 768         unsigned int v_ref_to_sync = 1;
 769         unsigned long value;
 770
 771         tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS);
 772
 773         value = (v_ref_to_sync << 16) | h_ref_to_sync;
 774         tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC);
 775
 776         value = ((mode->vsync_end - mode->vsync_start) << 16) |
 777                 ((mode->hsync_end - mode->hsync_start) <<  0);
 778         tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH);
 779
 780         value = ((mode->vtotal - mode->vsync_end) << 16) |
 781                 ((mode->htotal - mode->hsync_end) <<  0);
 782         tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);
 783
 784         value = ((mode->vsync_start - mode->vdisplay) << 16) |
 785                 ((mode->hsync_start - mode->hdisplay) <<  0);
 786         tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH);
 787
 788         value = (mode->vdisplay << 16) | mode->hdisplay;
 789         tegra_dc_writel(dc, value, DC_DISP_ACTIVE);
 790
 791         return 0;
 792 }
 793
 794 static int tegra_crtc_setup_clk(struct drm_crtc *crtc,
 795                                 struct drm_display_mode *mode)
 796 {
 797         unsigned long pclk = mode->clock * 1000;
 798         struct tegra_dc *dc = to_tegra_dc(crtc);
 799         struct tegra_output *output = NULL;
 800         struct drm_encoder *encoder;
 801         unsigned int div;
 802         u32 value;
 803         long err;
 804
 805         list_for_each_entry(encoder, &crtc->dev->mode_config.encoder_list, head)
 806                 if (encoder->crtc == crtc) {
 807                         output = encoder_to_output(encoder);
 808                         break;
 809                 }
 810
 811         if (!output)
 812                 return -ENODEV;
 813
 814         /*
 815          * This assumes that the parent clock is pll_d_out0 or pll_d2_out
 816          * respectively, each of which divides the base pll_d by 2.
 817          */
 818         err = tegra_output_setup_clock(output, dc->clk, pclk, &div);
 819         if (err < 0) {
 820                 dev_err(dc->dev, "failed to setup clock: %ld\n", err);
 821                 return err;
 822         }
 823
 824         DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk), div);
 825
 826         value = SHIFT_CLK_DIVIDER(div) | PIXEL_CLK_DIVIDER_PCD1;
 827         tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);
 828
 829         return 0;
 830 }
 831
 832 static int tegra_crtc_mode_set(struct drm_crtc *crtc,
 833                                struct drm_display_mode *mode,
 834                                struct drm_display_mode *adjusted,
 835                                int x, int y, struct drm_framebuffer *old_fb)
 836 {
 837         struct tegra_bo *bo = tegra_fb_get_plane(crtc->primary->fb, 0);
 838         struct tegra_dc *dc = to_tegra_dc(crtc);
 839         struct tegra_dc_window window;
 840         u32 value;
 841         int err;
 842
 843         err = tegra_crtc_setup_clk(crtc, mode);
 844         if (err) {
 845                 dev_err(dc->dev, "failed to setup clock for CRTC: %d\n", err);
 846                 return err;
 847         }
 848
 849         /* program display mode */
 850         tegra_dc_set_timings(dc, mode);
 851
 852         /* interlacing isn't supported yet, so disable it */
 853         if (dc->soc->supports_interlacing) {
 854                 value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL);
 855                 value &= ~INTERLACE_ENABLE;
 856                 tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL);
 857         }
 858
 859         /* setup window parameters */
 860         memset(&window, 0, sizeof(window));
 861         window.src.x = 0;
 862         window.src.y = 0;
 863         window.src.w = mode->hdisplay;
 864         window.src.h = mode->vdisplay;
 865         window.dst.x = 0;
 866         window.dst.y = 0;
 867         window.dst.w = mode->hdisplay;
 868         window.dst.h = mode->vdisplay;
 869         window.format = tegra_dc_format(crtc->primary->fb->pixel_format,
 870                                         &window.swap);
 871         window.bits_per_pixel = crtc->primary->fb->bits_per_pixel;
 872         window.stride[0] = crtc->primary->fb->pitches[0];
 873         window.base[0] = bo->paddr;
 874
 875         err = tegra_dc_setup_window(dc, 0, &window);
 876         if (err < 0)
 877                 dev_err(dc->dev, "failed to enable root plane\n");
 878
 879         return 0;
 880 }
 881
 882 static int tegra_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 883                                     struct drm_framebuffer *old_fb)
 884 {
 885         struct tegra_dc *dc = to_tegra_dc(crtc);
 886
 887         return tegra_dc_set_base(dc, x, y, crtc->primary->fb);
 888 }
 889
 890 static void tegra_crtc_prepare(struct drm_crtc *crtc)
 891 {
 892         struct tegra_dc *dc = to_tegra_dc(crtc);
 893         unsigned int syncpt;
 894         unsigned long value;
 895
 896         drm_crtc_vblank_off(crtc);
 897
 898         /* hardware initialization */
 899         reset_control_deassert(dc->rst);
 900         usleep_range(10000, 20000);
 901
 902         if (dc->pipe)
 903                 syncpt = SYNCPT_VBLANK1;
 904         else
 905                 syncpt = SYNCPT_VBLANK0;
 906
 907         /* initialize display controller */
 908         tegra_dc_writel(dc, 0x00000100, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
 909         tegra_dc_writel(dc, 0x100 | syncpt, DC_CMD_CONT_SYNCPT_VSYNC);
 910
 911         value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | WIN_A_OF_INT;
 912         tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
 913
 914         value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
 915                 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
 916         tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
 917
 918         /* initialize timer */
 919         value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) |
 920                 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20);
 921         tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY);
 922
 923         value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) |
 924                 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1);
 925         tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
 926
 927         value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT;
 928         tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
 929
 930         value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT;
 931         tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
 932 }
 933
 934 static void tegra_crtc_commit(struct drm_crtc *crtc)
 935 {
 936         struct tegra_dc *dc = to_tegra_dc(crtc);
 937         unsigned long value;
 938
 939         value = GENERAL_UPDATE | WIN_A_UPDATE;
 940         tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
 941
 942         value = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
 943         tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
 944
 945         drm_crtc_vblank_on(crtc);
 946 }
 947
 948 static void tegra_crtc_load_lut(struct drm_crtc *crtc)
 949 {
 950 }
 951
 952 static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
 953         .disable = tegra_crtc_disable,
 954         .mode_fixup = tegra_crtc_mode_fixup,
 955         .mode_set = tegra_crtc_mode_set,
 956         .mode_set_base = tegra_crtc_mode_set_base,
 957         .prepare = tegra_crtc_prepare,
 958         .commit = tegra_crtc_commit,
 959         .load_lut = tegra_crtc_load_lut,
 960 };
 961
 962 static irqreturn_t tegra_dc_irq(int irq, void *data)
 963 {
 964         struct tegra_dc *dc = data;
 965         unsigned long status;
 966
 967         status = tegra_dc_readl(dc, DC_CMD_INT_STATUS);
 968         tegra_dc_writel(dc, status, DC_CMD_INT_STATUS);
 969
 970         if (status & FRAME_END_INT) {
 971                 /*
 972                 dev_dbg(dc->dev, "%s(): frame end\n", __func__);
 973                 */
 974         }
 975
 976         if (status & VBLANK_INT) {
 977                 /*
 978                 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__);
 979                 */
 980                 drm_handle_vblank(dc->base.dev, dc->pipe);
 981                 tegra_dc_finish_page_flip(dc);
 982         }
 983
 984         if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) {
 985                 /*
 986                 dev_dbg(dc->dev, "%s(): underflow\n", __func__);
 987                 */
 988         }
 989
 990         return IRQ_HANDLED;
 991 }
 992
 993 static int tegra_dc_show_regs(struct seq_file *s, void *data)
 994 {
 995         struct drm_info_node *node = s->private;
 996         struct tegra_dc *dc = node->info_ent->data;
 997
 998 #define DUMP_REG(name)                                          \
 999         seq_printf(s, "%-40s %#05x %08lx\n", #name, name,       \
1000                    tegra_dc_readl(dc, name))
1001
1002         DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT);
1003         DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
1004         DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_ERROR);
1005         DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT);
1006         DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL);
1007         DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_ERROR);
1008         DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT);
1009         DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL);
1010         DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_ERROR);
1011         DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT);
1012         DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL);
1013         DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_ERROR);
1014         DUMP_REG(DC_CMD_CONT_SYNCPT_VSYNC);
1015         DUMP_REG(DC_CMD_DISPLAY_COMMAND_OPTION0);
1016         DUMP_REG(DC_CMD_DISPLAY_COMMAND);
1017         DUMP_REG(DC_CMD_SIGNAL_RAISE);
1018         DUMP_REG(DC_CMD_DISPLAY_POWER_CONTROL);
1019         DUMP_REG(DC_CMD_INT_STATUS);
1020         DUMP_REG(DC_CMD_INT_MASK);
1021         DUMP_REG(DC_CMD_INT_ENABLE);
1022         DUMP_REG(DC_CMD_INT_TYPE);
1023         DUMP_REG(DC_CMD_INT_POLARITY);
1024         DUMP_REG(DC_CMD_SIGNAL_RAISE1);
1025         DUMP_REG(DC_CMD_SIGNAL_RAISE2);
1026         DUMP_REG(DC_CMD_SIGNAL_RAISE3);
1027         DUMP_REG(DC_CMD_STATE_ACCESS);
1028         DUMP_REG(DC_CMD_STATE_CONTROL);
1029         DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER);
1030         DUMP_REG(DC_CMD_REG_ACT_CONTROL);
1031         DUMP_REG(DC_COM_CRC_CONTROL);
1032         DUMP_REG(DC_COM_CRC_CHECKSUM);
1033         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(0));
1034         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(1));
1035         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(2));
1036         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(3));
1037         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(0));
1038         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(1));
1039         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(2));
1040         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(3));
1041         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(0));
1042         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(1));
1043         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(2));
1044         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(3));
1045         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(0));
1046         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(1));
1047         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(2));
1048         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(3));
1049         DUMP_REG(DC_COM_PIN_INPUT_DATA(0));
1050         DUMP_REG(DC_COM_PIN_INPUT_DATA(1));
1051         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(0));
1052         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(1));
1053         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(2));
1054         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(3));
1055         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(4));
1056         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(5));
1057         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(6));
1058         DUMP_REG(DC_COM_PIN_MISC_CONTROL);
1059         DUMP_REG(DC_COM_PIN_PM0_CONTROL);
1060         DUMP_REG(DC_COM_PIN_PM0_DUTY_CYCLE);
1061         DUMP_REG(DC_COM_PIN_PM1_CONTROL);
1062         DUMP_REG(DC_COM_PIN_PM1_DUTY_CYCLE);
1063         DUMP_REG(DC_COM_SPI_CONTROL);
1064         DUMP_REG(DC_COM_SPI_START_BYTE);
1065         DUMP_REG(DC_COM_HSPI_WRITE_DATA_AB);
1066         DUMP_REG(DC_COM_HSPI_WRITE_DATA_CD);
1067         DUMP_REG(DC_COM_HSPI_CS_DC);
1068         DUMP_REG(DC_COM_SCRATCH_REGISTER_A);
1069         DUMP_REG(DC_COM_SCRATCH_REGISTER_B);
1070         DUMP_REG(DC_COM_GPIO_CTRL);
1071         DUMP_REG(DC_COM_GPIO_DEBOUNCE_COUNTER);
1072         DUMP_REG(DC_COM_CRC_CHECKSUM_LATCHED);
1073         DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS0);
1074         DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS1);
1075         DUMP_REG(DC_DISP_DISP_WIN_OPTIONS);
1076         DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY);
1077         DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
1078         DUMP_REG(DC_DISP_DISP_TIMING_OPTIONS);
1079         DUMP_REG(DC_DISP_REF_TO_SYNC);
1080         DUMP_REG(DC_DISP_SYNC_WIDTH);
1081         DUMP_REG(DC_DISP_BACK_PORCH);
1082         DUMP_REG(DC_DISP_ACTIVE);
1083         DUMP_REG(DC_DISP_FRONT_PORCH);
1084         DUMP_REG(DC_DISP_H_PULSE0_CONTROL);
1085         DUMP_REG(DC_DISP_H_PULSE0_POSITION_A);
1086         DUMP_REG(DC_DISP_H_PULSE0_POSITION_B);
1087         DUMP_REG(DC_DISP_H_PULSE0_POSITION_C);
1088         DUMP_REG(DC_DISP_H_PULSE0_POSITION_D);
1089         DUMP_REG(DC_DISP_H_PULSE1_CONTROL);
1090         DUMP_REG(DC_DISP_H_PULSE1_POSITION_A);
1091         DUMP_REG(DC_DISP_H_PULSE1_POSITION_B);
1092         DUMP_REG(DC_DISP_H_PULSE1_POSITION_C);
1093         DUMP_REG(DC_DISP_H_PULSE1_POSITION_D);
1094         DUMP_REG(DC_DISP_H_PULSE2_CONTROL);
1095         DUMP_REG(DC_DISP_H_PULSE2_POSITION_A);
1096         DUMP_REG(DC_DISP_H_PULSE2_POSITION_B);
1097         DUMP_REG(DC_DISP_H_PULSE2_POSITION_C);
1098         DUMP_REG(DC_DISP_H_PULSE2_POSITION_D);
1099         DUMP_REG(DC_DISP_V_PULSE0_CONTROL);
1100         DUMP_REG(DC_DISP_V_PULSE0_POSITION_A);
1101         DUMP_REG(DC_DISP_V_PULSE0_POSITION_B);
1102         DUMP_REG(DC_DISP_V_PULSE0_POSITION_C);
1103         DUMP_REG(DC_DISP_V_PULSE1_CONTROL);
1104         DUMP_REG(DC_DISP_V_PULSE1_POSITION_A);
1105         DUMP_REG(DC_DISP_V_PULSE1_POSITION_B);
1106         DUMP_REG(DC_DISP_V_PULSE1_POSITION_C);
1107         DUMP_REG(DC_DISP_V_PULSE2_CONTROL);
1108         DUMP_REG(DC_DISP_V_PULSE2_POSITION_A);
1109         DUMP_REG(DC_DISP_V_PULSE3_CONTROL);
1110         DUMP_REG(DC_DISP_V_PULSE3_POSITION_A);
1111         DUMP_REG(DC_DISP_M0_CONTROL);
1112         DUMP_REG(DC_DISP_M1_CONTROL);
1113         DUMP_REG(DC_DISP_DI_CONTROL);
1114         DUMP_REG(DC_DISP_PP_CONTROL);
1115         DUMP_REG(DC_DISP_PP_SELECT_A);
1116         DUMP_REG(DC_DISP_PP_SELECT_B);
1117         DUMP_REG(DC_DISP_PP_SELECT_C);
1118         DUMP_REG(DC_DISP_PP_SELECT_D);
1119         DUMP_REG(DC_DISP_DISP_CLOCK_CONTROL);
1120         DUMP_REG(DC_DISP_DISP_INTERFACE_CONTROL);
1121         DUMP_REG(DC_DISP_DISP_COLOR_CONTROL);
1122         DUMP_REG(DC_DISP_SHIFT_CLOCK_OPTIONS);
1123         DUMP_REG(DC_DISP_DATA_ENABLE_OPTIONS);
1124         DUMP_REG(DC_DISP_SERIAL_INTERFACE_OPTIONS);
1125         DUMP_REG(DC_DISP_LCD_SPI_OPTIONS);
1126         DUMP_REG(DC_DISP_BORDER_COLOR);
1127         DUMP_REG(DC_DISP_COLOR_KEY0_LOWER);
1128         DUMP_REG(DC_DISP_COLOR_KEY0_UPPER);
1129         DUMP_REG(DC_DISP_COLOR_KEY1_LOWER);
1130         DUMP_REG(DC_DISP_COLOR_KEY1_UPPER);
1131         DUMP_REG(DC_DISP_CURSOR_FOREGROUND);
1132         DUMP_REG(DC_DISP_CURSOR_BACKGROUND);
1133         DUMP_REG(DC_DISP_CURSOR_START_ADDR);
1134         DUMP_REG(DC_DISP_CURSOR_START_ADDR_NS);
1135         DUMP_REG(DC_DISP_CURSOR_POSITION);
1136         DUMP_REG(DC_DISP_CURSOR_POSITION_NS);
1137         DUMP_REG(DC_DISP_INIT_SEQ_CONTROL);
1138         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_A);
1139         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_B);
1140         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_C);
1141         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_D);
1142         DUMP_REG(DC_DISP_DC_MCCIF_FIFOCTRL);
1143         DUMP_REG(DC_DISP_MCCIF_DISPLAY0A_HYST);
1144         DUMP_REG(DC_DISP_MCCIF_DISPLAY0B_HYST);
1145         DUMP_REG(DC_DISP_MCCIF_DISPLAY1A_HYST);
1146         DUMP_REG(DC_DISP_MCCIF_DISPLAY1B_HYST);
1147         DUMP_REG(DC_DISP_DAC_CRT_CTRL);
1148         DUMP_REG(DC_DISP_DISP_MISC_CONTROL);
1149         DUMP_REG(DC_DISP_SD_CONTROL);
1150         DUMP_REG(DC_DISP_SD_CSC_COEFF);
1151         DUMP_REG(DC_DISP_SD_LUT(0));
1152         DUMP_REG(DC_DISP_SD_LUT(1));
1153         DUMP_REG(DC_DISP_SD_LUT(2));
1154         DUMP_REG(DC_DISP_SD_LUT(3));
1155         DUMP_REG(DC_DISP_SD_LUT(4));
1156         DUMP_REG(DC_DISP_SD_LUT(5));
1157         DUMP_REG(DC_DISP_SD_LUT(6));
1158         DUMP_REG(DC_DISP_SD_LUT(7));
1159         DUMP_REG(DC_DISP_SD_LUT(8));
1160         DUMP_REG(DC_DISP_SD_FLICKER_CONTROL);
1161         DUMP_REG(DC_DISP_DC_PIXEL_COUNT);
1162         DUMP_REG(DC_DISP_SD_HISTOGRAM(0));
1163         DUMP_REG(DC_DISP_SD_HISTOGRAM(1));
1164         DUMP_REG(DC_DISP_SD_HISTOGRAM(2));
1165         DUMP_REG(DC_DISP_SD_HISTOGRAM(3));
1166         DUMP_REG(DC_DISP_SD_HISTOGRAM(4));
1167         DUMP_REG(DC_DISP_SD_HISTOGRAM(5));
1168         DUMP_REG(DC_DISP_SD_HISTOGRAM(6));
1169         DUMP_REG(DC_DISP_SD_HISTOGRAM(7));
1170         DUMP_REG(DC_DISP_SD_BL_TF(0));
1171         DUMP_REG(DC_DISP_SD_BL_TF(1));
1172         DUMP_REG(DC_DISP_SD_BL_TF(2));
1173         DUMP_REG(DC_DISP_SD_BL_TF(3));
1174         DUMP_REG(DC_DISP_SD_BL_CONTROL);
1175         DUMP_REG(DC_DISP_SD_HW_K_VALUES);
1176         DUMP_REG(DC_DISP_SD_MAN_K_VALUES);
1177         DUMP_REG(DC_DISP_CURSOR_START_ADDR_HI);
1178         DUMP_REG(DC_DISP_BLEND_CURSOR_CONTROL);
1179         DUMP_REG(DC_WIN_WIN_OPTIONS);
1180         DUMP_REG(DC_WIN_BYTE_SWAP);
1181         DUMP_REG(DC_WIN_BUFFER_CONTROL);
1182         DUMP_REG(DC_WIN_COLOR_DEPTH);
1183         DUMP_REG(DC_WIN_POSITION);
1184         DUMP_REG(DC_WIN_SIZE);
1185         DUMP_REG(DC_WIN_PRESCALED_SIZE);
1186         DUMP_REG(DC_WIN_H_INITIAL_DDA);
1187         DUMP_REG(DC_WIN_V_INITIAL_DDA);
1188         DUMP_REG(DC_WIN_DDA_INC);
1189         DUMP_REG(DC_WIN_LINE_STRIDE);
1190         DUMP_REG(DC_WIN_BUF_STRIDE);
1191         DUMP_REG(DC_WIN_UV_BUF_STRIDE);
1192         DUMP_REG(DC_WIN_BUFFER_ADDR_MODE);
1193         DUMP_REG(DC_WIN_DV_CONTROL);
1194         DUMP_REG(DC_WIN_BLEND_NOKEY);
1195         DUMP_REG(DC_WIN_BLEND_1WIN);
1196         DUMP_REG(DC_WIN_BLEND_2WIN_X);
1197         DUMP_REG(DC_WIN_BLEND_2WIN_Y);
1198         DUMP_REG(DC_WIN_BLEND_3WIN_XY);
1199         DUMP_REG(DC_WIN_HP_FETCH_CONTROL);
1200         DUMP_REG(DC_WINBUF_START_ADDR);
1201         DUMP_REG(DC_WINBUF_START_ADDR_NS);
1202         DUMP_REG(DC_WINBUF_START_ADDR_U);
1203         DUMP_REG(DC_WINBUF_START_ADDR_U_NS);
1204         DUMP_REG(DC_WINBUF_START_ADDR_V);
1205         DUMP_REG(DC_WINBUF_START_ADDR_V_NS);
1206         DUMP_REG(DC_WINBUF_ADDR_H_OFFSET);
1207         DUMP_REG(DC_WINBUF_ADDR_H_OFFSET_NS);
1208         DUMP_REG(DC_WINBUF_ADDR_V_OFFSET);
1209         DUMP_REG(DC_WINBUF_ADDR_V_OFFSET_NS);
1210         DUMP_REG(DC_WINBUF_UFLOW_STATUS);
1211         DUMP_REG(DC_WINBUF_AD_UFLOW_STATUS);
1212         DUMP_REG(DC_WINBUF_BD_UFLOW_STATUS);
1213         DUMP_REG(DC_WINBUF_CD_UFLOW_STATUS);
1214
1215 #undef DUMP_REG
1216
1217         return 0;
1218 }
1219
1220 static struct drm_info_list debugfs_files[] = {
1221         { "regs", tegra_dc_show_regs, 0, NULL },
1222 };
1223
1224 static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor)
1225 {
1226         unsigned int i;
1227         char *name;
1228         int err;
1229
1230         name = kasprintf(GFP_KERNEL, "dc.%d", dc->pipe);
1231         dc->debugfs = debugfs_create_dir(name, minor->debugfs_root);
1232         kfree(name);
1233
1234         if (!dc->debugfs)
1235                 return -ENOMEM;
1236
1237         dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
1238                                     GFP_KERNEL);
1239         if (!dc->debugfs_files) {
1240                 err = -ENOMEM;
1241                 goto remove;
1242         }
1243
1244         for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
1245                 dc->debugfs_files[i].data = dc;
1246
1247         err = drm_debugfs_create_files(dc->debugfs_files,
1248                                        ARRAY_SIZE(debugfs_files),
1249                                        dc->debugfs, minor);
1250         if (err < 0)
1251                 goto free;
1252
1253         dc->minor = minor;
1254
1255         return 0;
1256
1257 free:
1258         kfree(dc->debugfs_files);
1259         dc->debugfs_files = NULL;
1260 remove:
1261         debugfs_remove(dc->debugfs);
1262         dc->debugfs = NULL;
1263
1264         return err;
1265 }
1266
1267 static int tegra_dc_debugfs_exit(struct tegra_dc *dc)
1268 {
1269         drm_debugfs_remove_files(dc->debugfs_files, ARRAY_SIZE(debugfs_files),
1270                                  dc->minor);
1271         dc->minor = NULL;
1272
1273         kfree(dc->debugfs_files);
1274         dc->debugfs_files = NULL;
1275
1276         debugfs_remove(dc->debugfs);
1277         dc->debugfs = NULL;
1278
1279         return 0;
1280 }
1281
1282 static int tegra_dc_init(struct host1x_client *client)
1283 {
1284         struct drm_device *drm = dev_get_drvdata(client->parent);
1285         struct tegra_dc *dc = host1x_client_to_dc(client);
1286         struct tegra_drm *tegra = drm->dev_private;
1287         int err;
1288
1289         drm_crtc_init(drm, &dc->base, &tegra_crtc_funcs);
1290         drm_mode_crtc_set_gamma_size(&dc->base, 256);
1291         drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
1292
1293         /*
1294          * Keep track of the minimum pitch alignment across all display
1295          * controllers.
1296          */
1297         if (dc->soc->pitch_align > tegra->pitch_align)
1298                 tegra->pitch_align = dc->soc->pitch_align;
1299
1300         err = tegra_dc_rgb_init(drm, dc);
1301         if (err < 0 && err != -ENODEV) {
1302                 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
1303                 return err;
1304         }
1305
1306         err = tegra_dc_add_planes(drm, dc);
1307         if (err < 0)
1308                 return err;
1309
1310         if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1311                 err = tegra_dc_debugfs_init(dc, drm->primary);
1312                 if (err < 0)
1313                         dev_err(dc->dev, "debugfs setup failed: %d\n", err);
1314         }
1315
1316         err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0,
1317                                dev_name(dc->dev), dc);
1318         if (err < 0) {
1319                 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq,
1320                         err);
1321                 return err;
1322         }
1323
1324         return 0;
1325 }
1326
1327 static int tegra_dc_exit(struct host1x_client *client)
1328 {
1329         struct tegra_dc *dc = host1x_client_to_dc(client);
1330         int err;
1331
1332         devm_free_irq(dc->dev, dc->irq, dc);
1333
1334         if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1335                 err = tegra_dc_debugfs_exit(dc);
1336                 if (err < 0)
1337                         dev_err(dc->dev, "debugfs cleanup failed: %d\n", err);
1338         }
1339
1340         err = tegra_dc_rgb_exit(dc);
1341         if (err) {
1342                 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err);
1343                 return err;
1344         }
1345
1346         return 0;
1347 }
1348
1349 static const struct host1x_client_ops dc_client_ops = {
1350         .init = tegra_dc_init,
1351         .exit = tegra_dc_exit,
1352 };
1353
1354 static const struct tegra_dc_soc_info tegra20_dc_soc_info = {
1355         .supports_interlacing = false,
1356         .supports_cursor = false,
1357         .supports_block_linear = false,
1358         .pitch_align = 8,
1359 };
1360
1361 static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
1362         .supports_interlacing = false,
1363         .supports_cursor = false,
1364         .supports_block_linear = false,
1365         .pitch_align = 8,
1366 };
1367
1368 static const struct tegra_dc_soc_info tegra114_dc_soc_info = {
1369         .supports_interlacing = false,
1370         .supports_cursor = false,
1371         .supports_block_linear = false,
1372         .pitch_align = 64,
1373 };
1374
1375 static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
1376         .supports_interlacing = true,
1377         .supports_cursor = true,
1378         .supports_block_linear = true,
1379         .pitch_align = 64,
1380 };
1381
1382 static const struct of_device_id tegra_dc_of_match[] = {
1383         {
1384                 .compatible = "nvidia,tegra124-dc",
1385                 .data = &tegra124_dc_soc_info,
1386         }, {
1387                 .compatible = "nvidia,tegra30-dc",
1388                 .data = &tegra30_dc_soc_info,
1389         }, {
1390                 .compatible = "nvidia,tegra20-dc",
1391                 .data = &tegra20_dc_soc_info,
1392         }, {
1393                 /* sentinel */
1394         }
1395 };
1396 MODULE_DEVICE_TABLE(of, tegra_dc_of_match);
1397
1398 static int tegra_dc_parse_dt(struct tegra_dc *dc)
1399 {
1400         struct device_node *np;
1401         u32 value = 0;
1402         int err;
1403
1404         err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value);
1405         if (err < 0) {
1406                 dev_err(dc->dev, "missing \"nvidia,head\" property\n");
1407
1408                 /*
1409                  * If the nvidia,head property isn't present, try to find the
1410                  * correct head number by looking up the position of this
1411                  * display controller's node within the device tree. Assuming
1412                  * that the nodes are ordered properly in the DTS file and
1413                  * that the translation into a flattened device tree blob
1414                  * preserves that ordering this will actually yield the right
1415                  * head number.
1416                  *
1417                  * If those assumptions don't hold, this will still work for
1418                  * cases where only a single display controller is used.
1419                  */
1420                 for_each_matching_node(np, tegra_dc_of_match) {
1421                         if (np == dc->dev->of_node)
1422                                 break;
1423
1424                         value++;
1425                 }
1426         }
1427
1428         dc->pipe = value;
1429
1430         return 0;
1431 }
1432
1433 static int tegra_dc_probe(struct platform_device *pdev)
1434 {
1435         const struct of_device_id *id;
1436         struct resource *regs;
1437         struct tegra_dc *dc;
1438         int err;
1439
1440         dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL);
1441         if (!dc)
1442                 return -ENOMEM;
1443
1444         id = of_match_node(tegra_dc_of_match, pdev->dev.of_node);
1445         if (!id)
1446                 return -ENODEV;
1447
1448         spin_lock_init(&dc->lock);
1449         INIT_LIST_HEAD(&dc->list);
1450         dc->dev = &pdev->dev;
1451         dc->soc = id->data;
1452
1453         err = tegra_dc_parse_dt(dc);
1454         if (err < 0)
1455                 return err;
1456
1457         dc->clk = devm_clk_get(&pdev->dev, NULL);
1458         if (IS_ERR(dc->clk)) {
1459                 dev_err(&pdev->dev, "failed to get clock\n");
1460                 return PTR_ERR(dc->clk);
1461         }
1462
1463         dc->rst = devm_reset_control_get(&pdev->dev, "dc");
1464         if (IS_ERR(dc->rst)) {
1465                 dev_err(&pdev->dev, "failed to get reset\n");
1466                 return PTR_ERR(dc->rst);
1467         }
1468
1469         err = clk_prepare_enable(dc->clk);
1470         if (err < 0)
1471                 return err;
1472
1473         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1474         dc->regs = devm_ioremap_resource(&pdev->dev, regs);
1475         if (IS_ERR(dc->regs))
1476                 return PTR_ERR(dc->regs);
1477
1478         dc->irq = platform_get_irq(pdev, 0);
1479         if (dc->irq < 0) {
1480                 dev_err(&pdev->dev, "failed to get IRQ\n");
1481                 return -ENXIO;
1482         }
1483
1484         INIT_LIST_HEAD(&dc->client.list);
1485         dc->client.ops = &dc_client_ops;
1486         dc->client.dev = &pdev->dev;
1487
1488         err = tegra_dc_rgb_probe(dc);
1489         if (err < 0 && err != -ENODEV) {
1490                 dev_err(&pdev->dev, "failed to probe RGB output: %d\n", err);
1491                 return err;
1492         }
1493
1494         err = host1x_client_register(&dc->client);
1495         if (err < 0) {
1496                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
1497                         err);
1498                 return err;
1499         }
1500
1501         platform_set_drvdata(pdev, dc);
1502
1503         return 0;
1504 }
1505
1506 static int tegra_dc_remove(struct platform_device *pdev)
1507 {
1508         struct tegra_dc *dc = platform_get_drvdata(pdev);
1509         int err;
1510
1511         err = host1x_client_unregister(&dc->client);
1512         if (err < 0) {
1513                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
1514                         err);
1515                 return err;
1516         }
1517
1518         err = tegra_dc_rgb_remove(dc);
1519         if (err < 0) {
1520                 dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err);
1521                 return err;
1522         }
1523
1524         reset_control_assert(dc->rst);
1525         clk_disable_unprepare(dc->clk);
1526
1527         return 0;
1528 }
1529
1530 struct platform_driver tegra_dc_driver = {
1531         .driver = {
1532                 .name = "tegra-dc",
1533                 .owner = THIS_MODULE,
1534                 .of_match_table = tegra_dc_of_match,
1535         },
1536         .probe = tegra_dc_probe,
1537         .remove = tegra_dc_remove,
1538 };