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/iommu.h>
  13 #include <linux/reset.h>
  14
  15 #include <soc/tegra/pmc.h>
  16
  17 #include "dc.h"
  18 #include "drm.h"
  19 #include "gem.h"
  20
  21 #include <drm/drm_atomic.h>
  22 #include <drm/drm_atomic_helper.h>
  23 #include <drm/drm_plane_helper.h>
  24
  25 struct tegra_dc_soc_info {
  26         bool supports_border_color;
  27         bool supports_interlacing;
  28         bool supports_cursor;
  29         bool supports_block_linear;
  30         unsigned int pitch_align;
  31         bool has_powergate;
  32 };
  33
  34 struct tegra_plane {
  35         struct drm_plane base;
  36         unsigned int index;
  37 };
  38
  39 static inline struct tegra_plane *to_tegra_plane(struct drm_plane *plane)
  40 {
  41         return container_of(plane, struct tegra_plane, base);
  42 }
  43
  44 struct tegra_dc_state {
  45         struct drm_crtc_state base;
  46
  47         struct clk *clk;
  48         unsigned long pclk;
  49         unsigned int div;
  50
  51         u32 planes;
  52 };
  53
  54 static inline struct tegra_dc_state *to_dc_state(struct drm_crtc_state *state)
  55 {
  56         if (state)
  57                 return container_of(state, struct tegra_dc_state, base);
  58
  59         return NULL;
  60 }
  61
  62 struct tegra_plane_state {
  63         struct drm_plane_state base;
  64
  65         struct tegra_bo_tiling tiling;
  66         u32 format;
  67         u32 swap;
  68 };
  69
  70 static inline struct tegra_plane_state *
  71 to_tegra_plane_state(struct drm_plane_state *state)
  72 {
  73         if (state)
  74                 return container_of(state, struct tegra_plane_state, base);
  75
  76         return NULL;
  77 }
  78
  79 static void tegra_dc_stats_reset(struct tegra_dc_stats *stats)
  80 {
  81         stats->frames = 0;
  82         stats->vblank = 0;
  83         stats->underflow = 0;
  84         stats->overflow = 0;
  85 }
  86
  87 /*
  88  * Reads the active copy of a register. This takes the dc->lock spinlock to
  89  * prevent races with the VBLANK processing which also needs access to the
  90  * active copy of some registers.
  91  */
  92 static u32 tegra_dc_readl_active(struct tegra_dc *dc, unsigned long offset)
  93 {
  94         unsigned long flags;
  95         u32 value;
  96
  97         spin_lock_irqsave(&dc->lock, flags);
  98
  99         tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
 100         value = tegra_dc_readl(dc, offset);
 101         tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
 102
 103         spin_unlock_irqrestore(&dc->lock, flags);
 104         return value;
 105 }
 106
 107 /*
 108  * Double-buffered registers have two copies: ASSEMBLY and ACTIVE. When the
 109  * *_ACT_REQ bits are set the ASSEMBLY copy is latched into the ACTIVE copy.
 110  * Latching happens mmediately if the display controller is in STOP mode or
 111  * on the next frame boundary otherwise.
 112  *
 113  * Triple-buffered registers have three copies: ASSEMBLY, ARM and ACTIVE. The
 114  * ASSEMBLY copy is latched into the ARM copy immediately after *_UPDATE bits
 115  * are written. When the *_ACT_REQ bits are written, the ARM copy is latched
 116  * into the ACTIVE copy, either immediately if the display controller is in
 117  * STOP mode, or at the next frame boundary otherwise.
 118  */
 119 void tegra_dc_commit(struct tegra_dc *dc)
 120 {
 121         tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
 122         tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
 123 }
 124
 125 static int tegra_dc_format(u32 fourcc, u32 *format, u32 *swap)
 126 {
 127         /* assume no swapping of fetched data */
 128         if (swap)
 129                 *swap = BYTE_SWAP_NOSWAP;
 130
 131         switch (fourcc) {
 132         case DRM_FORMAT_XBGR8888:
 133                 *format = WIN_COLOR_DEPTH_R8G8B8A8;
 134                 break;
 135
 136         case DRM_FORMAT_XRGB8888:
 137                 *format = WIN_COLOR_DEPTH_B8G8R8A8;
 138                 break;
 139
 140         case DRM_FORMAT_RGB565:
 141                 *format = WIN_COLOR_DEPTH_B5G6R5;
 142                 break;
 143
 144         case DRM_FORMAT_UYVY:
 145                 *format = WIN_COLOR_DEPTH_YCbCr422;
 146                 break;
 147
 148         case DRM_FORMAT_YUYV:
 149                 if (swap)
 150                         *swap = BYTE_SWAP_SWAP2;
 151
 152                 *format = WIN_COLOR_DEPTH_YCbCr422;
 153                 break;
 154
 155         case DRM_FORMAT_YUV420:
 156                 *format = WIN_COLOR_DEPTH_YCbCr420P;
 157                 break;
 158
 159         case DRM_FORMAT_YUV422:
 160                 *format = WIN_COLOR_DEPTH_YCbCr422P;
 161                 break;
 162
 163         default:
 164                 return -EINVAL;
 165         }
 166
 167         return 0;
 168 }
 169
 170 static bool tegra_dc_format_is_yuv(unsigned int format, bool *planar)
 171 {
 172         switch (format) {
 173         case WIN_COLOR_DEPTH_YCbCr422:
 174         case WIN_COLOR_DEPTH_YUV422:
 175                 if (planar)
 176                         *planar = false;
 177
 178                 return true;
 179
 180         case WIN_COLOR_DEPTH_YCbCr420P:
 181         case WIN_COLOR_DEPTH_YUV420P:
 182         case WIN_COLOR_DEPTH_YCbCr422P:
 183         case WIN_COLOR_DEPTH_YUV422P:
 184         case WIN_COLOR_DEPTH_YCbCr422R:
 185         case WIN_COLOR_DEPTH_YUV422R:
 186         case WIN_COLOR_DEPTH_YCbCr422RA:
 187         case WIN_COLOR_DEPTH_YUV422RA:
 188                 if (planar)
 189                         *planar = true;
 190
 191                 return true;
 192         }
 193
 194         if (planar)
 195                 *planar = false;
 196
 197         return false;
 198 }
 199
 200 static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v,
 201                                   unsigned int bpp)
 202 {
 203         fixed20_12 outf = dfixed_init(out);
 204         fixed20_12 inf = dfixed_init(in);
 205         u32 dda_inc;
 206         int max;
 207
 208         if (v)
 209                 max = 15;
 210         else {
 211                 switch (bpp) {
 212                 case 2:
 213                         max = 8;
 214                         break;
 215
 216                 default:
 217                         WARN_ON_ONCE(1);
 218                         /* fallthrough */
 219                 case 4:
 220                         max = 4;
 221                         break;
 222                 }
 223         }
 224
 225         outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1));
 226         inf.full -= dfixed_const(1);
 227
 228         dda_inc = dfixed_div(inf, outf);
 229         dda_inc = min_t(u32, dda_inc, dfixed_const(max));
 230
 231         return dda_inc;
 232 }
 233
 234 static inline u32 compute_initial_dda(unsigned int in)
 235 {
 236         fixed20_12 inf = dfixed_init(in);
 237         return dfixed_frac(inf);
 238 }
 239
 240 static void tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index,
 241                                   const struct tegra_dc_window *window)
 242 {
 243         unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp;
 244         unsigned long value, flags;
 245         bool yuv, planar;
 246
 247         /*
 248          * For YUV planar modes, the number of bytes per pixel takes into
 249          * account only the luma component and therefore is 1.
 250          */
 251         yuv = tegra_dc_format_is_yuv(window->format, &planar);
 252         if (!yuv)
 253                 bpp = window->bits_per_pixel / 8;
 254         else
 255                 bpp = planar ? 1 : 2;
 256
 257         spin_lock_irqsave(&dc->lock, flags);
 258
 259         value = WINDOW_A_SELECT << index;
 260         tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
 261
 262         tegra_dc_writel(dc, window->format, DC_WIN_COLOR_DEPTH);
 263         tegra_dc_writel(dc, window->swap, DC_WIN_BYTE_SWAP);
 264
 265         value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x);
 266         tegra_dc_writel(dc, value, DC_WIN_POSITION);
 267
 268         value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w);
 269         tegra_dc_writel(dc, value, DC_WIN_SIZE);
 270
 271         h_offset = window->src.x * bpp;
 272         v_offset = window->src.y;
 273         h_size = window->src.w * bpp;
 274         v_size = window->src.h;
 275
 276         value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size);
 277         tegra_dc_writel(dc, value, DC_WIN_PRESCALED_SIZE);
 278
 279         /*
 280          * For DDA computations the number of bytes per pixel for YUV planar
 281          * modes needs to take into account all Y, U and V components.
 282          */
 283         if (yuv && planar)
 284                 bpp = 2;
 285
 286         h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp);
 287         v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp);
 288
 289         value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda);
 290         tegra_dc_writel(dc, value, DC_WIN_DDA_INC);
 291
 292         h_dda = compute_initial_dda(window->src.x);
 293         v_dda = compute_initial_dda(window->src.y);
 294
 295         tegra_dc_writel(dc, h_dda, DC_WIN_H_INITIAL_DDA);
 296         tegra_dc_writel(dc, v_dda, DC_WIN_V_INITIAL_DDA);
 297
 298         tegra_dc_writel(dc, 0, DC_WIN_UV_BUF_STRIDE);
 299         tegra_dc_writel(dc, 0, DC_WIN_BUF_STRIDE);
 300
 301         tegra_dc_writel(dc, window->base[0], DC_WINBUF_START_ADDR);
 302
 303         if (yuv && planar) {
 304                 tegra_dc_writel(dc, window->base[1], DC_WINBUF_START_ADDR_U);
 305                 tegra_dc_writel(dc, window->base[2], DC_WINBUF_START_ADDR_V);
 306                 value = window->stride[1] << 16 | window->stride[0];
 307                 tegra_dc_writel(dc, value, DC_WIN_LINE_STRIDE);
 308         } else {
 309                 tegra_dc_writel(dc, window->stride[0], DC_WIN_LINE_STRIDE);
 310         }
 311
 312         if (window->bottom_up)
 313                 v_offset += window->src.h - 1;
 314
 315         tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
 316         tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
 317
 318         if (dc->soc->supports_block_linear) {
 319                 unsigned long height = window->tiling.value;
 320
 321                 switch (window->tiling.mode) {
 322                 case TEGRA_BO_TILING_MODE_PITCH:
 323                         value = DC_WINBUF_SURFACE_KIND_PITCH;
 324                         break;
 325
 326                 case TEGRA_BO_TILING_MODE_TILED:
 327                         value = DC_WINBUF_SURFACE_KIND_TILED;
 328                         break;
 329
 330                 case TEGRA_BO_TILING_MODE_BLOCK:
 331                         value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
 332                                 DC_WINBUF_SURFACE_KIND_BLOCK;
 333                         break;
 334                 }
 335
 336                 tegra_dc_writel(dc, value, DC_WINBUF_SURFACE_KIND);
 337         } else {
 338                 switch (window->tiling.mode) {
 339                 case TEGRA_BO_TILING_MODE_PITCH:
 340                         value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV |
 341                                 DC_WIN_BUFFER_ADDR_MODE_LINEAR;
 342                         break;
 343
 344                 case TEGRA_BO_TILING_MODE_TILED:
 345                         value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV |
 346                                 DC_WIN_BUFFER_ADDR_MODE_TILE;
 347                         break;
 348
 349                 case TEGRA_BO_TILING_MODE_BLOCK:
 350                         /*
 351                          * No need to handle this here because ->atomic_check
 352                          * will already have filtered it out.
 353                          */
 354                         break;
 355                 }
 356
 357                 tegra_dc_writel(dc, value, DC_WIN_BUFFER_ADDR_MODE);
 358         }
 359
 360         value = WIN_ENABLE;
 361
 362         if (yuv) {
 363                 /* setup default colorspace conversion coefficients */
 364                 tegra_dc_writel(dc, 0x00f0, DC_WIN_CSC_YOF);
 365                 tegra_dc_writel(dc, 0x012a, DC_WIN_CSC_KYRGB);
 366                 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KUR);
 367                 tegra_dc_writel(dc, 0x0198, DC_WIN_CSC_KVR);
 368                 tegra_dc_writel(dc, 0x039b, DC_WIN_CSC_KUG);
 369                 tegra_dc_writel(dc, 0x032f, DC_WIN_CSC_KVG);
 370                 tegra_dc_writel(dc, 0x0204, DC_WIN_CSC_KUB);
 371                 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KVB);
 372
 373                 value |= CSC_ENABLE;
 374         } else if (window->bits_per_pixel < 24) {
 375                 value |= COLOR_EXPAND;
 376         }
 377
 378         if (window->bottom_up)
 379                 value |= V_DIRECTION;
 380
 381         tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
 382
 383         /*
 384          * Disable blending and assume Window A is the bottom-most window,
 385          * Window C is the top-most window and Window B is in the middle.
 386          */
 387         tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_NOKEY);
 388         tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_1WIN);
 389
 390         switch (index) {
 391         case 0:
 392                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_X);
 393                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
 394                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
 395                 break;
 396
 397         case 1:
 398                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
 399                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
 400                 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
 401                 break;
 402
 403         case 2:
 404                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
 405                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_Y);
 406                 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_3WIN_XY);
 407                 break;
 408         }
 409
 410         spin_unlock_irqrestore(&dc->lock, flags);
 411 }
 412
 413 static void tegra_plane_destroy(struct drm_plane *plane)
 414 {
 415         struct tegra_plane *p = to_tegra_plane(plane);
 416
 417         drm_plane_cleanup(plane);
 418         kfree(p);
 419 }
 420
 421 static const u32 tegra_primary_plane_formats[] = {
 422         DRM_FORMAT_XBGR8888,
 423         DRM_FORMAT_XRGB8888,
 424         DRM_FORMAT_RGB565,
 425 };
 426
 427 static void tegra_primary_plane_destroy(struct drm_plane *plane)
 428 {
 429         tegra_plane_destroy(plane);
 430 }
 431
 432 static void tegra_plane_reset(struct drm_plane *plane)
 433 {
 434         struct tegra_plane_state *state;
 435
 436         if (plane->state)
 437                 __drm_atomic_helper_plane_destroy_state(plane->state);
 438
 439         kfree(plane->state);
 440         plane->state = NULL;
 441
 442         state = kzalloc(sizeof(*state), GFP_KERNEL);
 443         if (state) {
 444                 plane->state = &state->base;
 445                 plane->state->plane = plane;
 446         }
 447 }
 448
 449 static struct drm_plane_state *tegra_plane_atomic_duplicate_state(struct drm_plane *plane)
 450 {
 451         struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
 452         struct tegra_plane_state *copy;
 453
 454         copy = kmalloc(sizeof(*copy), GFP_KERNEL);
 455         if (!copy)
 456                 return NULL;
 457
 458         __drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
 459         copy->tiling = state->tiling;
 460         copy->format = state->format;
 461         copy->swap = state->swap;
 462
 463         return &copy->base;
 464 }
 465
 466 static void tegra_plane_atomic_destroy_state(struct drm_plane *plane,
 467                                              struct drm_plane_state *state)
 468 {
 469         __drm_atomic_helper_plane_destroy_state(state);
 470         kfree(state);
 471 }
 472
 473 static const struct drm_plane_funcs tegra_primary_plane_funcs = {
 474         .update_plane = drm_atomic_helper_update_plane,
 475         .disable_plane = drm_atomic_helper_disable_plane,
 476         .destroy = tegra_primary_plane_destroy,
 477         .reset = tegra_plane_reset,
 478         .atomic_duplicate_state = tegra_plane_atomic_duplicate_state,
 479         .atomic_destroy_state = tegra_plane_atomic_destroy_state,
 480 };
 481
 482 static int tegra_plane_prepare_fb(struct drm_plane *plane,
 483                                   const struct drm_plane_state *new_state)
 484 {
 485         return 0;
 486 }
 487
 488 static void tegra_plane_cleanup_fb(struct drm_plane *plane,
 489                                    const struct drm_plane_state *old_fb)
 490 {
 491 }
 492
 493 static int tegra_plane_state_add(struct tegra_plane *plane,
 494                                  struct drm_plane_state *state)
 495 {
 496         struct drm_crtc_state *crtc_state;
 497         struct tegra_dc_state *tegra;
 498
 499         /* Propagate errors from allocation or locking failures. */
 500         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
 501         if (IS_ERR(crtc_state))
 502                 return PTR_ERR(crtc_state);
 503
 504         tegra = to_dc_state(crtc_state);
 505
 506         tegra->planes |= WIN_A_ACT_REQ << plane->index;
 507
 508         return 0;
 509 }
 510
 511 static int tegra_plane_atomic_check(struct drm_plane *plane,
 512                                     struct drm_plane_state *state)
 513 {
 514         struct tegra_plane_state *plane_state = to_tegra_plane_state(state);
 515         struct tegra_bo_tiling *tiling = &plane_state->tiling;
 516         struct tegra_plane *tegra = to_tegra_plane(plane);
 517         struct tegra_dc *dc = to_tegra_dc(state->crtc);
 518         int err;
 519
 520         /* no need for further checks if the plane is being disabled */
 521         if (!state->crtc)
 522                 return 0;
 523
 524         err = tegra_dc_format(state->fb->pixel_format, &plane_state->format,
 525                               &plane_state->swap);
 526         if (err < 0)
 527                 return err;
 528
 529         err = tegra_fb_get_tiling(state->fb, tiling);
 530         if (err < 0)
 531                 return err;
 532
 533         if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK &&
 534             !dc->soc->supports_block_linear) {
 535                 DRM_ERROR("hardware doesn't support block linear mode\n");
 536                 return -EINVAL;
 537         }
 538
 539         /*
 540          * Tegra doesn't support different strides for U and V planes so we
 541          * error out if the user tries to display a framebuffer with such a
 542          * configuration.
 543          */
 544         if (drm_format_num_planes(state->fb->pixel_format) > 2) {
 545                 if (state->fb->pitches[2] != state->fb->pitches[1]) {
 546                         DRM_ERROR("unsupported UV-plane configuration\n");
 547                         return -EINVAL;
 548                 }
 549         }
 550
 551         err = tegra_plane_state_add(tegra, state);
 552         if (err < 0)
 553                 return err;
 554
 555         return 0;
 556 }
 557
 558 static void tegra_plane_atomic_update(struct drm_plane *plane,
 559                                       struct drm_plane_state *old_state)
 560 {
 561         struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
 562         struct tegra_dc *dc = to_tegra_dc(plane->state->crtc);
 563         struct drm_framebuffer *fb = plane->state->fb;
 564         struct tegra_plane *p = to_tegra_plane(plane);
 565         struct tegra_dc_window window;
 566         unsigned int i;
 567
 568         /* rien ne va plus */
 569         if (!plane->state->crtc || !plane->state->fb)
 570                 return;
 571
 572         memset(&window, 0, sizeof(window));
 573         window.src.x = plane->state->src_x >> 16;
 574         window.src.y = plane->state->src_y >> 16;
 575         window.src.w = plane->state->src_w >> 16;
 576         window.src.h = plane->state->src_h >> 16;
 577         window.dst.x = plane->state->crtc_x;
 578         window.dst.y = plane->state->crtc_y;
 579         window.dst.w = plane->state->crtc_w;
 580         window.dst.h = plane->state->crtc_h;
 581         window.bits_per_pixel = fb->bits_per_pixel;
 582         window.bottom_up = tegra_fb_is_bottom_up(fb);
 583
 584         /* copy from state */
 585         window.tiling = state->tiling;
 586         window.format = state->format;
 587         window.swap = state->swap;
 588
 589         for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) {
 590                 struct tegra_bo *bo = tegra_fb_get_plane(fb, i);
 591
 592                 window.base[i] = bo->paddr + fb->offsets[i];
 593                 window.stride[i] = fb->pitches[i];
 594         }
 595
 596         tegra_dc_setup_window(dc, p->index, &window);
 597 }
 598
 599 static void tegra_plane_atomic_disable(struct drm_plane *plane,
 600                                        struct drm_plane_state *old_state)
 601 {
 602         struct tegra_plane *p = to_tegra_plane(plane);
 603         struct tegra_dc *dc;
 604         unsigned long flags;
 605         u32 value;
 606
 607         /* rien ne va plus */
 608         if (!old_state || !old_state->crtc)
 609                 return;
 610
 611         dc = to_tegra_dc(old_state->crtc);
 612
 613         spin_lock_irqsave(&dc->lock, flags);
 614
 615         value = WINDOW_A_SELECT << p->index;
 616         tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
 617
 618         value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
 619         value &= ~WIN_ENABLE;
 620         tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
 621
 622         spin_unlock_irqrestore(&dc->lock, flags);
 623 }
 624
 625 static const struct drm_plane_helper_funcs tegra_primary_plane_helper_funcs = {
 626         .prepare_fb = tegra_plane_prepare_fb,
 627         .cleanup_fb = tegra_plane_cleanup_fb,
 628         .atomic_check = tegra_plane_atomic_check,
 629         .atomic_update = tegra_plane_atomic_update,
 630         .atomic_disable = tegra_plane_atomic_disable,
 631 };
 632
 633 static struct drm_plane *tegra_dc_primary_plane_create(struct drm_device *drm,
 634                                                        struct tegra_dc *dc)
 635 {
 636         /*
 637          * Ideally this would use drm_crtc_mask(), but that would require the
 638          * CRTC to already be in the mode_config's list of CRTCs. However, it
 639          * will only be added to that list in the drm_crtc_init_with_planes()
 640          * (in tegra_dc_init()), which in turn requires registration of these
 641          * planes. So we have ourselves a nice little chicken and egg problem
 642          * here.
 643          *
 644          * We work around this by manually creating the mask from the number
 645          * of CRTCs that have been registered, and should therefore always be
 646          * the same as drm_crtc_index() after registration.
 647          */
 648         unsigned long possible_crtcs = 1 << drm->mode_config.num_crtc;
 649         struct tegra_plane *plane;
 650         unsigned int num_formats;
 651         const u32 *formats;
 652         int err;
 653
 654         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 655         if (!plane)
 656                 return ERR_PTR(-ENOMEM);
 657
 658         num_formats = ARRAY_SIZE(tegra_primary_plane_formats);
 659         formats = tegra_primary_plane_formats;
 660
 661         err = drm_universal_plane_init(drm, &plane->base, possible_crtcs,
 662                                        &tegra_primary_plane_funcs, formats,
 663                                        num_formats, DRM_PLANE_TYPE_PRIMARY,
 664                                        NULL);
 665         if (err < 0) {
 666                 kfree(plane);
 667                 return ERR_PTR(err);
 668         }
 669
 670         drm_plane_helper_add(&plane->base, &tegra_primary_plane_helper_funcs);
 671
 672         return &plane->base;
 673 }
 674
 675 static const u32 tegra_cursor_plane_formats[] = {
 676         DRM_FORMAT_RGBA8888,
 677 };
 678
 679 static int tegra_cursor_atomic_check(struct drm_plane *plane,
 680                                      struct drm_plane_state *state)
 681 {
 682         struct tegra_plane *tegra = to_tegra_plane(plane);
 683         int err;
 684
 685         /* no need for further checks if the plane is being disabled */
 686         if (!state->crtc)
 687                 return 0;
 688
 689         /* scaling not supported for cursor */
 690         if ((state->src_w >> 16 != state->crtc_w) ||
 691             (state->src_h >> 16 != state->crtc_h))
 692                 return -EINVAL;
 693
 694         /* only square cursors supported */
 695         if (state->src_w != state->src_h)
 696                 return -EINVAL;
 697
 698         if (state->crtc_w != 32 && state->crtc_w != 64 &&
 699             state->crtc_w != 128 && state->crtc_w != 256)
 700                 return -EINVAL;
 701
 702         err = tegra_plane_state_add(tegra, state);
 703         if (err < 0)
 704                 return err;
 705
 706         return 0;
 707 }
 708
 709 static void tegra_cursor_atomic_update(struct drm_plane *plane,
 710                                        struct drm_plane_state *old_state)
 711 {
 712         struct tegra_bo *bo = tegra_fb_get_plane(plane->state->fb, 0);
 713         struct tegra_dc *dc = to_tegra_dc(plane->state->crtc);
 714         struct drm_plane_state *state = plane->state;
 715         u32 value = CURSOR_CLIP_DISPLAY;
 716
 717         /* rien ne va plus */
 718         if (!plane->state->crtc || !plane->state->fb)
 719                 return;
 720
 721         switch (state->crtc_w) {
 722         case 32:
 723                 value |= CURSOR_SIZE_32x32;
 724                 break;
 725
 726         case 64:
 727                 value |= CURSOR_SIZE_64x64;
 728                 break;
 729
 730         case 128:
 731                 value |= CURSOR_SIZE_128x128;
 732                 break;
 733
 734         case 256:
 735                 value |= CURSOR_SIZE_256x256;
 736                 break;
 737
 738         default:
 739                 WARN(1, "cursor size %ux%u not supported\n", state->crtc_w,
 740                      state->crtc_h);
 741                 return;
 742         }
 743
 744         value |= (bo->paddr >> 10) & 0x3fffff;
 745         tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR);
 746
 747 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
 748         value = (bo->paddr >> 32) & 0x3;
 749         tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR_HI);
 750 #endif
 751
 752         /* enable cursor and set blend mode */
 753         value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
 754         value |= CURSOR_ENABLE;
 755         tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
 756
 757         value = tegra_dc_readl(dc, DC_DISP_BLEND_CURSOR_CONTROL);
 758         value &= ~CURSOR_DST_BLEND_MASK;
 759         value &= ~CURSOR_SRC_BLEND_MASK;
 760         value |= CURSOR_MODE_NORMAL;
 761         value |= CURSOR_DST_BLEND_NEG_K1_TIMES_SRC;
 762         value |= CURSOR_SRC_BLEND_K1_TIMES_SRC;
 763         value |= CURSOR_ALPHA;
 764         tegra_dc_writel(dc, value, DC_DISP_BLEND_CURSOR_CONTROL);
 765
 766         /* position the cursor */
 767         value = (state->crtc_y & 0x3fff) << 16 | (state->crtc_x & 0x3fff);
 768         tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION);
 769 }
 770
 771 static void tegra_cursor_atomic_disable(struct drm_plane *plane,
 772                                         struct drm_plane_state *old_state)
 773 {
 774         struct tegra_dc *dc;
 775         u32 value;
 776
 777         /* rien ne va plus */
 778         if (!old_state || !old_state->crtc)
 779                 return;
 780
 781         dc = to_tegra_dc(old_state->crtc);
 782
 783         value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
 784         value &= ~CURSOR_ENABLE;
 785         tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
 786 }
 787
 788 static const struct drm_plane_funcs tegra_cursor_plane_funcs = {
 789         .update_plane = drm_atomic_helper_update_plane,
 790         .disable_plane = drm_atomic_helper_disable_plane,
 791         .destroy = tegra_plane_destroy,
 792         .reset = tegra_plane_reset,
 793         .atomic_duplicate_state = tegra_plane_atomic_duplicate_state,
 794         .atomic_destroy_state = tegra_plane_atomic_destroy_state,
 795 };
 796
 797 static const struct drm_plane_helper_funcs tegra_cursor_plane_helper_funcs = {
 798         .prepare_fb = tegra_plane_prepare_fb,
 799         .cleanup_fb = tegra_plane_cleanup_fb,
 800         .atomic_check = tegra_cursor_atomic_check,
 801         .atomic_update = tegra_cursor_atomic_update,
 802         .atomic_disable = tegra_cursor_atomic_disable,
 803 };
 804
 805 static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
 806                                                       struct tegra_dc *dc)
 807 {
 808         struct tegra_plane *plane;
 809         unsigned int num_formats;
 810         const u32 *formats;
 811         int err;
 812
 813         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 814         if (!plane)
 815                 return ERR_PTR(-ENOMEM);
 816
 817         /*
 818          * This index is kind of fake. The cursor isn't a regular plane, but
 819          * its update and activation request bits in DC_CMD_STATE_CONTROL do
 820          * use the same programming. Setting this fake index here allows the
 821          * code in tegra_add_plane_state() to do the right thing without the
 822          * need to special-casing the cursor plane.
 823          */
 824         plane->index = 6;
 825
 826         num_formats = ARRAY_SIZE(tegra_cursor_plane_formats);
 827         formats = tegra_cursor_plane_formats;
 828
 829         err = drm_universal_plane_init(drm, &plane->base, 1 << dc->pipe,
 830                                        &tegra_cursor_plane_funcs, formats,
 831                                        num_formats, DRM_PLANE_TYPE_CURSOR,
 832                                        NULL);
 833         if (err < 0) {
 834                 kfree(plane);
 835                 return ERR_PTR(err);
 836         }
 837
 838         drm_plane_helper_add(&plane->base, &tegra_cursor_plane_helper_funcs);
 839
 840         return &plane->base;
 841 }
 842
 843 static void tegra_overlay_plane_destroy(struct drm_plane *plane)
 844 {
 845         tegra_plane_destroy(plane);
 846 }
 847
 848 static const struct drm_plane_funcs tegra_overlay_plane_funcs = {
 849         .update_plane = drm_atomic_helper_update_plane,
 850         .disable_plane = drm_atomic_helper_disable_plane,
 851         .destroy = tegra_overlay_plane_destroy,
 852         .reset = tegra_plane_reset,
 853         .atomic_duplicate_state = tegra_plane_atomic_duplicate_state,
 854         .atomic_destroy_state = tegra_plane_atomic_destroy_state,
 855 };
 856
 857 static const uint32_t tegra_overlay_plane_formats[] = {
 858         DRM_FORMAT_XBGR8888,
 859         DRM_FORMAT_XRGB8888,
 860         DRM_FORMAT_RGB565,
 861         DRM_FORMAT_UYVY,
 862         DRM_FORMAT_YUYV,
 863         DRM_FORMAT_YUV420,
 864         DRM_FORMAT_YUV422,
 865 };
 866
 867 static const struct drm_plane_helper_funcs tegra_overlay_plane_helper_funcs = {
 868         .prepare_fb = tegra_plane_prepare_fb,
 869         .cleanup_fb = tegra_plane_cleanup_fb,
 870         .atomic_check = tegra_plane_atomic_check,
 871         .atomic_update = tegra_plane_atomic_update,
 872         .atomic_disable = tegra_plane_atomic_disable,
 873 };
 874
 875 static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
 876                                                        struct tegra_dc *dc,
 877                                                        unsigned int index)
 878 {
 879         struct tegra_plane *plane;
 880         unsigned int num_formats;
 881         const u32 *formats;
 882         int err;
 883
 884         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 885         if (!plane)
 886                 return ERR_PTR(-ENOMEM);
 887
 888         plane->index = index;
 889
 890         num_formats = ARRAY_SIZE(tegra_overlay_plane_formats);
 891         formats = tegra_overlay_plane_formats;
 892
 893         err = drm_universal_plane_init(drm, &plane->base, 1 << dc->pipe,
 894                                        &tegra_overlay_plane_funcs, formats,
 895                                        num_formats, DRM_PLANE_TYPE_OVERLAY,
 896                                        NULL);
 897         if (err < 0) {
 898                 kfree(plane);
 899                 return ERR_PTR(err);
 900         }
 901
 902         drm_plane_helper_add(&plane->base, &tegra_overlay_plane_helper_funcs);
 903
 904         return &plane->base;
 905 }
 906
 907 static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc)
 908 {
 909         struct drm_plane *plane;
 910         unsigned int i;
 911
 912         for (i = 0; i < 2; i++) {
 913                 plane = tegra_dc_overlay_plane_create(drm, dc, 1 + i);
 914                 if (IS_ERR(plane))
 915                         return PTR_ERR(plane);
 916         }
 917
 918         return 0;
 919 }
 920
 921 u32 tegra_dc_get_vblank_counter(struct tegra_dc *dc)
 922 {
 923         if (dc->syncpt)
 924                 return host1x_syncpt_read(dc->syncpt);
 925
 926         /* fallback to software emulated VBLANK counter */
 927         return drm_crtc_vblank_count(&dc->base);
 928 }
 929
 930 void tegra_dc_enable_vblank(struct tegra_dc *dc)
 931 {
 932         unsigned long value, flags;
 933
 934         spin_lock_irqsave(&dc->lock, flags);
 935
 936         value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
 937         value |= VBLANK_INT;
 938         tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
 939
 940         spin_unlock_irqrestore(&dc->lock, flags);
 941 }
 942
 943 void tegra_dc_disable_vblank(struct tegra_dc *dc)
 944 {
 945         unsigned long value, flags;
 946
 947         spin_lock_irqsave(&dc->lock, flags);
 948
 949         value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
 950         value &= ~VBLANK_INT;
 951         tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
 952
 953         spin_unlock_irqrestore(&dc->lock, flags);
 954 }
 955
 956 static void tegra_dc_finish_page_flip(struct tegra_dc *dc)
 957 {
 958         struct drm_device *drm = dc->base.dev;
 959         struct drm_crtc *crtc = &dc->base;
 960         unsigned long flags, base;
 961         struct tegra_bo *bo;
 962
 963         spin_lock_irqsave(&drm->event_lock, flags);
 964
 965         if (!dc->event) {
 966                 spin_unlock_irqrestore(&drm->event_lock, flags);
 967                 return;
 968         }
 969
 970         bo = tegra_fb_get_plane(crtc->primary->fb, 0);
 971
 972         spin_lock(&dc->lock);
 973
 974         /* check if new start address has been latched */
 975         tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER);
 976         tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
 977         base = tegra_dc_readl(dc, DC_WINBUF_START_ADDR);
 978         tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
 979
 980         spin_unlock(&dc->lock);
 981
 982         if (base == bo->paddr + crtc->primary->fb->offsets[0]) {
 983                 drm_crtc_send_vblank_event(crtc, dc->event);
 984                 drm_crtc_vblank_put(crtc);
 985                 dc->event = NULL;
 986         }
 987
 988         spin_unlock_irqrestore(&drm->event_lock, flags);
 989 }
 990
 991 static void tegra_dc_destroy(struct drm_crtc *crtc)
 992 {
 993         drm_crtc_cleanup(crtc);
 994 }
 995
 996 static void tegra_crtc_reset(struct drm_crtc *crtc)
 997 {
 998         struct tegra_dc_state *state;
 999
1000         if (crtc->state)
1001                 __drm_atomic_helper_crtc_destroy_state(crtc->state);
1002
1003         kfree(crtc->state);
1004         crtc->state = NULL;
1005
1006         state = kzalloc(sizeof(*state), GFP_KERNEL);
1007         if (state) {
1008                 crtc->state = &state->base;
1009                 crtc->state->crtc = crtc;
1010         }
1011
1012         drm_crtc_vblank_reset(crtc);
1013 }
1014
1015 static struct drm_crtc_state *
1016 tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
1017 {
1018         struct tegra_dc_state *state = to_dc_state(crtc->state);
1019         struct tegra_dc_state *copy;
1020
1021         copy = kmalloc(sizeof(*copy), GFP_KERNEL);
1022         if (!copy)
1023                 return NULL;
1024
1025         __drm_atomic_helper_crtc_duplicate_state(crtc, &copy->base);
1026         copy->clk = state->clk;
1027         copy->pclk = state->pclk;
1028         copy->div = state->div;
1029         copy->planes = state->planes;
1030
1031         return &copy->base;
1032 }
1033
1034 static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc,
1035                                             struct drm_crtc_state *state)
1036 {
1037         __drm_atomic_helper_crtc_destroy_state(state);
1038         kfree(state);
1039 }
1040
1041 static const struct drm_crtc_funcs tegra_crtc_funcs = {
1042         .page_flip = drm_atomic_helper_page_flip,
1043         .set_config = drm_atomic_helper_set_config,
1044         .destroy = tegra_dc_destroy,
1045         .reset = tegra_crtc_reset,
1046         .atomic_duplicate_state = tegra_crtc_atomic_duplicate_state,
1047         .atomic_destroy_state = tegra_crtc_atomic_destroy_state,
1048 };
1049
1050 static int tegra_dc_set_timings(struct tegra_dc *dc,
1051                                 struct drm_display_mode *mode)
1052 {
1053         unsigned int h_ref_to_sync = 1;
1054         unsigned int v_ref_to_sync = 1;
1055         unsigned long value;
1056
1057         tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS);
1058
1059         value = (v_ref_to_sync << 16) | h_ref_to_sync;
1060         tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC);
1061
1062         value = ((mode->vsync_end - mode->vsync_start) << 16) |
1063                 ((mode->hsync_end - mode->hsync_start) <<  0);
1064         tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH);
1065
1066         value = ((mode->vtotal - mode->vsync_end) << 16) |
1067                 ((mode->htotal - mode->hsync_end) <<  0);
1068         tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);
1069
1070         value = ((mode->vsync_start - mode->vdisplay) << 16) |
1071                 ((mode->hsync_start - mode->hdisplay) <<  0);
1072         tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH);
1073
1074         value = (mode->vdisplay << 16) | mode->hdisplay;
1075         tegra_dc_writel(dc, value, DC_DISP_ACTIVE);
1076
1077         return 0;
1078 }
1079
1080 /**
1081  * tegra_dc_state_setup_clock - check clock settings and store them in atomic
1082  *     state
1083  * @dc: display controller
1084  * @crtc_state: CRTC atomic state
1085  * @clk: parent clock for display controller
1086  * @pclk: pixel clock
1087  * @div: shift clock divider
1088  *
1089  * Returns:
1090  * 0 on success or a negative error-code on failure.
1091  */
1092 int tegra_dc_state_setup_clock(struct tegra_dc *dc,
1093                                struct drm_crtc_state *crtc_state,
1094                                struct clk *clk, unsigned long pclk,
1095                                unsigned int div)
1096 {
1097         struct tegra_dc_state *state = to_dc_state(crtc_state);
1098
1099         if (!clk_has_parent(dc->clk, clk))
1100                 return -EINVAL;
1101
1102         state->clk = clk;
1103         state->pclk = pclk;
1104         state->div = div;
1105
1106         return 0;
1107 }
1108
1109 static void tegra_dc_commit_state(struct tegra_dc *dc,
1110                                   struct tegra_dc_state *state)
1111 {
1112         u32 value;
1113         int err;
1114
1115         err = clk_set_parent(dc->clk, state->clk);
1116         if (err < 0)
1117                 dev_err(dc->dev, "failed to set parent clock: %d\n", err);
1118
1119         /*
1120          * Outputs may not want to change the parent clock rate. This is only
1121          * relevant to Tegra20 where only a single display PLL is available.
1122          * Since that PLL would typically be used for HDMI, an internal LVDS
1123          * panel would need to be driven by some other clock such as PLL_P
1124          * which is shared with other peripherals. Changing the clock rate
1125          * should therefore be avoided.
1126          */
1127         if (state->pclk > 0) {
1128                 err = clk_set_rate(state->clk, state->pclk);
1129                 if (err < 0)
1130                         dev_err(dc->dev,
1131                                 "failed to set clock rate to %lu Hz\n",
1132                                 state->pclk);
1133         }
1134
1135         DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk),
1136                       state->div);
1137         DRM_DEBUG_KMS("pclk: %lu\n", state->pclk);
1138
1139         value = SHIFT_CLK_DIVIDER(state->div) | PIXEL_CLK_DIVIDER_PCD1;
1140         tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);
1141 }
1142
1143 static void tegra_dc_stop(struct tegra_dc *dc)
1144 {
1145         u32 value;
1146
1147         /* stop the display controller */
1148         value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
1149         value &= ~DISP_CTRL_MODE_MASK;
1150         tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
1151
1152         tegra_dc_commit(dc);
1153 }
1154
1155 static bool tegra_dc_idle(struct tegra_dc *dc)
1156 {
1157         u32 value;
1158
1159         value = tegra_dc_readl_active(dc, DC_CMD_DISPLAY_COMMAND);
1160
1161         return (value & DISP_CTRL_MODE_MASK) == 0;
1162 }
1163
1164 static int tegra_dc_wait_idle(struct tegra_dc *dc, unsigned long timeout)
1165 {
1166         timeout = jiffies + msecs_to_jiffies(timeout);
1167
1168         while (time_before(jiffies, timeout)) {
1169                 if (tegra_dc_idle(dc))
1170                         return 0;
1171
1172                 usleep_range(1000, 2000);
1173         }
1174
1175         dev_dbg(dc->dev, "timeout waiting for DC to become idle\n");
1176         return -ETIMEDOUT;
1177 }
1178
1179 static void tegra_crtc_disable(struct drm_crtc *crtc)
1180 {
1181         struct tegra_dc *dc = to_tegra_dc(crtc);
1182         u32 value;
1183
1184         if (!tegra_dc_idle(dc)) {
1185                 tegra_dc_stop(dc);
1186
1187                 /*
1188                  * Ignore the return value, there isn't anything useful to do
1189                  * in case this fails.
1190                  */
1191                 tegra_dc_wait_idle(dc, 100);
1192         }
1193
1194         /*
1195          * This should really be part of the RGB encoder driver, but clearing
1196          * these bits has the side-effect of stopping the display controller.
1197          * When that happens no VBLANK interrupts will be raised. At the same
1198          * time the encoder is disabled before the display controller, so the
1199          * above code is always going to timeout waiting for the controller
1200          * to go idle.
1201          *
1202          * Given the close coupling between the RGB encoder and the display
1203          * controller doing it here is still kind of okay. None of the other
1204          * encoder drivers require these bits to be cleared.
1205          *
1206          * XXX: Perhaps given that the display controller is switched off at
1207          * this point anyway maybe clearing these bits isn't even useful for
1208          * the RGB encoder?
1209          */
1210         if (dc->rgb) {
1211                 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
1212                 value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
1213                            PW4_ENABLE | PM0_ENABLE | PM1_ENABLE);
1214                 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
1215         }
1216
1217         tegra_dc_stats_reset(&dc->stats);
1218         drm_crtc_vblank_off(crtc);
1219 }
1220
1221 static void tegra_crtc_enable(struct drm_crtc *crtc)
1222 {
1223         struct drm_display_mode *mode = &crtc->state->adjusted_mode;
1224         struct tegra_dc_state *state = to_dc_state(crtc->state);
1225         struct tegra_dc *dc = to_tegra_dc(crtc);
1226         u32 value;
1227
1228         tegra_dc_commit_state(dc, state);
1229
1230         /* program display mode */
1231         tegra_dc_set_timings(dc, mode);
1232
1233         /* interlacing isn't supported yet, so disable it */
1234         if (dc->soc->supports_interlacing) {
1235                 value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL);
1236                 value &= ~INTERLACE_ENABLE;
1237                 tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL);
1238         }
1239
1240         value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
1241         value &= ~DISP_CTRL_MODE_MASK;
1242         value |= DISP_CTRL_MODE_C_DISPLAY;
1243         tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
1244
1245         value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
1246         value |= PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
1247                  PW4_ENABLE | PM0_ENABLE | PM1_ENABLE;
1248         tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
1249
1250         tegra_dc_commit(dc);
1251
1252         drm_crtc_vblank_on(crtc);
1253 }
1254
1255 static int tegra_crtc_atomic_check(struct drm_crtc *crtc,
1256                                    struct drm_crtc_state *state)
1257 {
1258         return 0;
1259 }
1260
1261 static void tegra_crtc_atomic_begin(struct drm_crtc *crtc,
1262                                     struct drm_crtc_state *old_crtc_state)
1263 {
1264         struct tegra_dc *dc = to_tegra_dc(crtc);
1265
1266         if (crtc->state->event) {
1267                 crtc->state->event->pipe = drm_crtc_index(crtc);
1268
1269                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
1270
1271                 dc->event = crtc->state->event;
1272                 crtc->state->event = NULL;
1273         }
1274 }
1275
1276 static void tegra_crtc_atomic_flush(struct drm_crtc *crtc,
1277                                     struct drm_crtc_state *old_crtc_state)
1278 {
1279         struct tegra_dc_state *state = to_dc_state(crtc->state);
1280         struct tegra_dc *dc = to_tegra_dc(crtc);
1281
1282         tegra_dc_writel(dc, state->planes << 8, DC_CMD_STATE_CONTROL);
1283         tegra_dc_writel(dc, state->planes, DC_CMD_STATE_CONTROL);
1284 }
1285
1286 static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
1287         .disable = tegra_crtc_disable,
1288         .enable = tegra_crtc_enable,
1289         .atomic_check = tegra_crtc_atomic_check,
1290         .atomic_begin = tegra_crtc_atomic_begin,
1291         .atomic_flush = tegra_crtc_atomic_flush,
1292 };
1293
1294 static irqreturn_t tegra_dc_irq(int irq, void *data)
1295 {
1296         struct tegra_dc *dc = data;
1297         unsigned long status;
1298
1299         status = tegra_dc_readl(dc, DC_CMD_INT_STATUS);
1300         tegra_dc_writel(dc, status, DC_CMD_INT_STATUS);
1301
1302         if (status & FRAME_END_INT) {
1303                 /*
1304                 dev_dbg(dc->dev, "%s(): frame end\n", __func__);
1305                 */
1306                 dc->stats.frames++;
1307         }
1308
1309         if (status & VBLANK_INT) {
1310                 /*
1311                 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__);
1312                 */
1313                 drm_crtc_handle_vblank(&dc->base);
1314                 tegra_dc_finish_page_flip(dc);
1315                 dc->stats.vblank++;
1316         }
1317
1318         if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) {
1319                 /*
1320                 dev_dbg(dc->dev, "%s(): underflow\n", __func__);
1321                 */
1322                 dc->stats.underflow++;
1323         }
1324
1325         if (status & (WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT)) {
1326                 /*
1327                 dev_dbg(dc->dev, "%s(): overflow\n", __func__);
1328                 */
1329                 dc->stats.overflow++;
1330         }
1331
1332         return IRQ_HANDLED;
1333 }
1334
1335 static int tegra_dc_show_regs(struct seq_file *s, void *data)
1336 {
1337         struct drm_info_node *node = s->private;
1338         struct tegra_dc *dc = node->info_ent->data;
1339         int err = 0;
1340
1341         drm_modeset_lock_crtc(&dc->base, NULL);
1342
1343         if (!dc->base.state->active) {
1344                 err = -EBUSY;
1345                 goto unlock;
1346         }
1347
1348 #define DUMP_REG(name)                                          \
1349         seq_printf(s, "%-40s %#05x %08x\n", #name, name,        \
1350                    tegra_dc_readl(dc, name))
1351
1352         DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT);
1353         DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
1354         DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_ERROR);
1355         DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT);
1356         DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL);
1357         DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_ERROR);
1358         DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT);
1359         DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL);
1360         DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_ERROR);
1361         DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT);
1362         DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL);
1363         DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_ERROR);
1364         DUMP_REG(DC_CMD_CONT_SYNCPT_VSYNC);
1365         DUMP_REG(DC_CMD_DISPLAY_COMMAND_OPTION0);
1366         DUMP_REG(DC_CMD_DISPLAY_COMMAND);
1367         DUMP_REG(DC_CMD_SIGNAL_RAISE);
1368         DUMP_REG(DC_CMD_DISPLAY_POWER_CONTROL);
1369         DUMP_REG(DC_CMD_INT_STATUS);
1370         DUMP_REG(DC_CMD_INT_MASK);
1371         DUMP_REG(DC_CMD_INT_ENABLE);
1372         DUMP_REG(DC_CMD_INT_TYPE);
1373         DUMP_REG(DC_CMD_INT_POLARITY);
1374         DUMP_REG(DC_CMD_SIGNAL_RAISE1);
1375         DUMP_REG(DC_CMD_SIGNAL_RAISE2);
1376         DUMP_REG(DC_CMD_SIGNAL_RAISE3);
1377         DUMP_REG(DC_CMD_STATE_ACCESS);
1378         DUMP_REG(DC_CMD_STATE_CONTROL);
1379         DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER);
1380         DUMP_REG(DC_CMD_REG_ACT_CONTROL);
1381         DUMP_REG(DC_COM_CRC_CONTROL);
1382         DUMP_REG(DC_COM_CRC_CHECKSUM);
1383         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(0));
1384         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(1));
1385         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(2));
1386         DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(3));
1387         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(0));
1388         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(1));
1389         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(2));
1390         DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(3));
1391         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(0));
1392         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(1));
1393         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(2));
1394         DUMP_REG(DC_COM_PIN_OUTPUT_DATA(3));
1395         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(0));
1396         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(1));
1397         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(2));
1398         DUMP_REG(DC_COM_PIN_INPUT_ENABLE(3));
1399         DUMP_REG(DC_COM_PIN_INPUT_DATA(0));
1400         DUMP_REG(DC_COM_PIN_INPUT_DATA(1));
1401         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(0));
1402         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(1));
1403         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(2));
1404         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(3));
1405         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(4));
1406         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(5));
1407         DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(6));
1408         DUMP_REG(DC_COM_PIN_MISC_CONTROL);
1409         DUMP_REG(DC_COM_PIN_PM0_CONTROL);
1410         DUMP_REG(DC_COM_PIN_PM0_DUTY_CYCLE);
1411         DUMP_REG(DC_COM_PIN_PM1_CONTROL);
1412         DUMP_REG(DC_COM_PIN_PM1_DUTY_CYCLE);
1413         DUMP_REG(DC_COM_SPI_CONTROL);
1414         DUMP_REG(DC_COM_SPI_START_BYTE);
1415         DUMP_REG(DC_COM_HSPI_WRITE_DATA_AB);
1416         DUMP_REG(DC_COM_HSPI_WRITE_DATA_CD);
1417         DUMP_REG(DC_COM_HSPI_CS_DC);
1418         DUMP_REG(DC_COM_SCRATCH_REGISTER_A);
1419         DUMP_REG(DC_COM_SCRATCH_REGISTER_B);
1420         DUMP_REG(DC_COM_GPIO_CTRL);
1421         DUMP_REG(DC_COM_GPIO_DEBOUNCE_COUNTER);
1422         DUMP_REG(DC_COM_CRC_CHECKSUM_LATCHED);
1423         DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS0);
1424         DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS1);
1425         DUMP_REG(DC_DISP_DISP_WIN_OPTIONS);
1426         DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY);
1427         DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
1428         DUMP_REG(DC_DISP_DISP_TIMING_OPTIONS);
1429         DUMP_REG(DC_DISP_REF_TO_SYNC);
1430         DUMP_REG(DC_DISP_SYNC_WIDTH);
1431         DUMP_REG(DC_DISP_BACK_PORCH);
1432         DUMP_REG(DC_DISP_ACTIVE);
1433         DUMP_REG(DC_DISP_FRONT_PORCH);
1434         DUMP_REG(DC_DISP_H_PULSE0_CONTROL);
1435         DUMP_REG(DC_DISP_H_PULSE0_POSITION_A);
1436         DUMP_REG(DC_DISP_H_PULSE0_POSITION_B);
1437         DUMP_REG(DC_DISP_H_PULSE0_POSITION_C);
1438         DUMP_REG(DC_DISP_H_PULSE0_POSITION_D);
1439         DUMP_REG(DC_DISP_H_PULSE1_CONTROL);
1440         DUMP_REG(DC_DISP_H_PULSE1_POSITION_A);
1441         DUMP_REG(DC_DISP_H_PULSE1_POSITION_B);
1442         DUMP_REG(DC_DISP_H_PULSE1_POSITION_C);
1443         DUMP_REG(DC_DISP_H_PULSE1_POSITION_D);
1444         DUMP_REG(DC_DISP_H_PULSE2_CONTROL);
1445         DUMP_REG(DC_DISP_H_PULSE2_POSITION_A);
1446         DUMP_REG(DC_DISP_H_PULSE2_POSITION_B);
1447         DUMP_REG(DC_DISP_H_PULSE2_POSITION_C);
1448         DUMP_REG(DC_DISP_H_PULSE2_POSITION_D);
1449         DUMP_REG(DC_DISP_V_PULSE0_CONTROL);
1450         DUMP_REG(DC_DISP_V_PULSE0_POSITION_A);
1451         DUMP_REG(DC_DISP_V_PULSE0_POSITION_B);
1452         DUMP_REG(DC_DISP_V_PULSE0_POSITION_C);
1453         DUMP_REG(DC_DISP_V_PULSE1_CONTROL);
1454         DUMP_REG(DC_DISP_V_PULSE1_POSITION_A);
1455         DUMP_REG(DC_DISP_V_PULSE1_POSITION_B);
1456         DUMP_REG(DC_DISP_V_PULSE1_POSITION_C);
1457         DUMP_REG(DC_DISP_V_PULSE2_CONTROL);
1458         DUMP_REG(DC_DISP_V_PULSE2_POSITION_A);
1459         DUMP_REG(DC_DISP_V_PULSE3_CONTROL);
1460         DUMP_REG(DC_DISP_V_PULSE3_POSITION_A);
1461         DUMP_REG(DC_DISP_M0_CONTROL);
1462         DUMP_REG(DC_DISP_M1_CONTROL);
1463         DUMP_REG(DC_DISP_DI_CONTROL);
1464         DUMP_REG(DC_DISP_PP_CONTROL);
1465         DUMP_REG(DC_DISP_PP_SELECT_A);
1466         DUMP_REG(DC_DISP_PP_SELECT_B);
1467         DUMP_REG(DC_DISP_PP_SELECT_C);
1468         DUMP_REG(DC_DISP_PP_SELECT_D);
1469         DUMP_REG(DC_DISP_DISP_CLOCK_CONTROL);
1470         DUMP_REG(DC_DISP_DISP_INTERFACE_CONTROL);
1471         DUMP_REG(DC_DISP_DISP_COLOR_CONTROL);
1472         DUMP_REG(DC_DISP_SHIFT_CLOCK_OPTIONS);
1473         DUMP_REG(DC_DISP_DATA_ENABLE_OPTIONS);
1474         DUMP_REG(DC_DISP_SERIAL_INTERFACE_OPTIONS);
1475         DUMP_REG(DC_DISP_LCD_SPI_OPTIONS);
1476         DUMP_REG(DC_DISP_BORDER_COLOR);
1477         DUMP_REG(DC_DISP_COLOR_KEY0_LOWER);
1478         DUMP_REG(DC_DISP_COLOR_KEY0_UPPER);
1479         DUMP_REG(DC_DISP_COLOR_KEY1_LOWER);
1480         DUMP_REG(DC_DISP_COLOR_KEY1_UPPER);
1481         DUMP_REG(DC_DISP_CURSOR_FOREGROUND);
1482         DUMP_REG(DC_DISP_CURSOR_BACKGROUND);
1483         DUMP_REG(DC_DISP_CURSOR_START_ADDR);
1484         DUMP_REG(DC_DISP_CURSOR_START_ADDR_NS);
1485         DUMP_REG(DC_DISP_CURSOR_POSITION);
1486         DUMP_REG(DC_DISP_CURSOR_POSITION_NS);
1487         DUMP_REG(DC_DISP_INIT_SEQ_CONTROL);
1488         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_A);
1489         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_B);
1490         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_C);
1491         DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_D);
1492         DUMP_REG(DC_DISP_DC_MCCIF_FIFOCTRL);
1493         DUMP_REG(DC_DISP_MCCIF_DISPLAY0A_HYST);
1494         DUMP_REG(DC_DISP_MCCIF_DISPLAY0B_HYST);
1495         DUMP_REG(DC_DISP_MCCIF_DISPLAY1A_HYST);
1496         DUMP_REG(DC_DISP_MCCIF_DISPLAY1B_HYST);
1497         DUMP_REG(DC_DISP_DAC_CRT_CTRL);
1498         DUMP_REG(DC_DISP_DISP_MISC_CONTROL);
1499         DUMP_REG(DC_DISP_SD_CONTROL);
1500         DUMP_REG(DC_DISP_SD_CSC_COEFF);
1501         DUMP_REG(DC_DISP_SD_LUT(0));
1502         DUMP_REG(DC_DISP_SD_LUT(1));
1503         DUMP_REG(DC_DISP_SD_LUT(2));
1504         DUMP_REG(DC_DISP_SD_LUT(3));
1505         DUMP_REG(DC_DISP_SD_LUT(4));
1506         DUMP_REG(DC_DISP_SD_LUT(5));
1507         DUMP_REG(DC_DISP_SD_LUT(6));
1508         DUMP_REG(DC_DISP_SD_LUT(7));
1509         DUMP_REG(DC_DISP_SD_LUT(8));
1510         DUMP_REG(DC_DISP_SD_FLICKER_CONTROL);
1511         DUMP_REG(DC_DISP_DC_PIXEL_COUNT);
1512         DUMP_REG(DC_DISP_SD_HISTOGRAM(0));
1513         DUMP_REG(DC_DISP_SD_HISTOGRAM(1));
1514         DUMP_REG(DC_DISP_SD_HISTOGRAM(2));
1515         DUMP_REG(DC_DISP_SD_HISTOGRAM(3));
1516         DUMP_REG(DC_DISP_SD_HISTOGRAM(4));
1517         DUMP_REG(DC_DISP_SD_HISTOGRAM(5));
1518         DUMP_REG(DC_DISP_SD_HISTOGRAM(6));
1519         DUMP_REG(DC_DISP_SD_HISTOGRAM(7));
1520         DUMP_REG(DC_DISP_SD_BL_TF(0));
1521         DUMP_REG(DC_DISP_SD_BL_TF(1));
1522         DUMP_REG(DC_DISP_SD_BL_TF(2));
1523         DUMP_REG(DC_DISP_SD_BL_TF(3));
1524         DUMP_REG(DC_DISP_SD_BL_CONTROL);
1525         DUMP_REG(DC_DISP_SD_HW_K_VALUES);
1526         DUMP_REG(DC_DISP_SD_MAN_K_VALUES);
1527         DUMP_REG(DC_DISP_CURSOR_START_ADDR_HI);
1528         DUMP_REG(DC_DISP_BLEND_CURSOR_CONTROL);
1529         DUMP_REG(DC_WIN_WIN_OPTIONS);
1530         DUMP_REG(DC_WIN_BYTE_SWAP);
1531         DUMP_REG(DC_WIN_BUFFER_CONTROL);
1532         DUMP_REG(DC_WIN_COLOR_DEPTH);
1533         DUMP_REG(DC_WIN_POSITION);
1534         DUMP_REG(DC_WIN_SIZE);
1535         DUMP_REG(DC_WIN_PRESCALED_SIZE);
1536         DUMP_REG(DC_WIN_H_INITIAL_DDA);
1537         DUMP_REG(DC_WIN_V_INITIAL_DDA);
1538         DUMP_REG(DC_WIN_DDA_INC);
1539         DUMP_REG(DC_WIN_LINE_STRIDE);
1540         DUMP_REG(DC_WIN_BUF_STRIDE);
1541         DUMP_REG(DC_WIN_UV_BUF_STRIDE);
1542         DUMP_REG(DC_WIN_BUFFER_ADDR_MODE);
1543         DUMP_REG(DC_WIN_DV_CONTROL);
1544         DUMP_REG(DC_WIN_BLEND_NOKEY);
1545         DUMP_REG(DC_WIN_BLEND_1WIN);
1546         DUMP_REG(DC_WIN_BLEND_2WIN_X);
1547         DUMP_REG(DC_WIN_BLEND_2WIN_Y);
1548         DUMP_REG(DC_WIN_BLEND_3WIN_XY);
1549         DUMP_REG(DC_WIN_HP_FETCH_CONTROL);
1550         DUMP_REG(DC_WINBUF_START_ADDR);
1551         DUMP_REG(DC_WINBUF_START_ADDR_NS);
1552         DUMP_REG(DC_WINBUF_START_ADDR_U);
1553         DUMP_REG(DC_WINBUF_START_ADDR_U_NS);
1554         DUMP_REG(DC_WINBUF_START_ADDR_V);
1555         DUMP_REG(DC_WINBUF_START_ADDR_V_NS);
1556         DUMP_REG(DC_WINBUF_ADDR_H_OFFSET);
1557         DUMP_REG(DC_WINBUF_ADDR_H_OFFSET_NS);
1558         DUMP_REG(DC_WINBUF_ADDR_V_OFFSET);
1559         DUMP_REG(DC_WINBUF_ADDR_V_OFFSET_NS);
1560         DUMP_REG(DC_WINBUF_UFLOW_STATUS);
1561         DUMP_REG(DC_WINBUF_AD_UFLOW_STATUS);
1562         DUMP_REG(DC_WINBUF_BD_UFLOW_STATUS);
1563         DUMP_REG(DC_WINBUF_CD_UFLOW_STATUS);
1564
1565 #undef DUMP_REG
1566
1567 unlock:
1568         drm_modeset_unlock_crtc(&dc->base);
1569         return err;
1570 }
1571
1572 static int tegra_dc_show_crc(struct seq_file *s, void *data)
1573 {
1574         struct drm_info_node *node = s->private;
1575         struct tegra_dc *dc = node->info_ent->data;
1576         int err = 0;
1577         u32 value;
1578
1579         drm_modeset_lock_crtc(&dc->base, NULL);
1580
1581         if (!dc->base.state->active) {
1582                 err = -EBUSY;
1583                 goto unlock;
1584         }
1585
1586         value = DC_COM_CRC_CONTROL_ACTIVE_DATA | DC_COM_CRC_CONTROL_ENABLE;
1587         tegra_dc_writel(dc, value, DC_COM_CRC_CONTROL);
1588         tegra_dc_commit(dc);
1589
1590         drm_crtc_wait_one_vblank(&dc->base);
1591         drm_crtc_wait_one_vblank(&dc->base);
1592
1593         value = tegra_dc_readl(dc, DC_COM_CRC_CHECKSUM);
1594         seq_printf(s, "%08x\n", value);
1595
1596         tegra_dc_writel(dc, 0, DC_COM_CRC_CONTROL);
1597
1598 unlock:
1599         drm_modeset_unlock_crtc(&dc->base);
1600         return err;
1601 }
1602
1603 static int tegra_dc_show_stats(struct seq_file *s, void *data)
1604 {
1605         struct drm_info_node *node = s->private;
1606         struct tegra_dc *dc = node->info_ent->data;
1607
1608         seq_printf(s, "frames: %lu\n", dc->stats.frames);
1609         seq_printf(s, "vblank: %lu\n", dc->stats.vblank);
1610         seq_printf(s, "underflow: %lu\n", dc->stats.underflow);
1611         seq_printf(s, "overflow: %lu\n", dc->stats.overflow);
1612
1613         return 0;
1614 }
1615
1616 static struct drm_info_list debugfs_files[] = {
1617         { "regs", tegra_dc_show_regs, 0, NULL },
1618         { "crc", tegra_dc_show_crc, 0, NULL },
1619         { "stats", tegra_dc_show_stats, 0, NULL },
1620 };
1621
1622 static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor)
1623 {
1624         unsigned int i;
1625         char *name;
1626         int err;
1627
1628         name = kasprintf(GFP_KERNEL, "dc.%d", dc->pipe);
1629         dc->debugfs = debugfs_create_dir(name, minor->debugfs_root);
1630         kfree(name);
1631
1632         if (!dc->debugfs)
1633                 return -ENOMEM;
1634
1635         dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
1636                                     GFP_KERNEL);
1637         if (!dc->debugfs_files) {
1638                 err = -ENOMEM;
1639                 goto remove;
1640         }
1641
1642         for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
1643                 dc->debugfs_files[i].data = dc;
1644
1645         err = drm_debugfs_create_files(dc->debugfs_files,
1646                                        ARRAY_SIZE(debugfs_files),
1647                                        dc->debugfs, minor);
1648         if (err < 0)
1649                 goto free;
1650
1651         dc->minor = minor;
1652
1653         return 0;
1654
1655 free:
1656         kfree(dc->debugfs_files);
1657         dc->debugfs_files = NULL;
1658 remove:
1659         debugfs_remove(dc->debugfs);
1660         dc->debugfs = NULL;
1661
1662         return err;
1663 }
1664
1665 static int tegra_dc_debugfs_exit(struct tegra_dc *dc)
1666 {
1667         drm_debugfs_remove_files(dc->debugfs_files, ARRAY_SIZE(debugfs_files),
1668                                  dc->minor);
1669         dc->minor = NULL;
1670
1671         kfree(dc->debugfs_files);
1672         dc->debugfs_files = NULL;
1673
1674         debugfs_remove(dc->debugfs);
1675         dc->debugfs = NULL;
1676
1677         return 0;
1678 }
1679
1680 static int tegra_dc_init(struct host1x_client *client)
1681 {
1682         struct drm_device *drm = dev_get_drvdata(client->parent);
1683         unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED;
1684         struct tegra_dc *dc = host1x_client_to_dc(client);
1685         struct tegra_drm *tegra = drm->dev_private;
1686         struct drm_plane *primary = NULL;
1687         struct drm_plane *cursor = NULL;
1688         u32 value;
1689         int err;
1690
1691         dc->syncpt = host1x_syncpt_request(dc->dev, flags);
1692         if (!dc->syncpt)
1693                 dev_warn(dc->dev, "failed to allocate syncpoint\n");
1694
1695         if (tegra->domain) {
1696                 err = iommu_attach_device(tegra->domain, dc->dev);
1697                 if (err < 0) {
1698                         dev_err(dc->dev, "failed to attach to domain: %d\n",
1699                                 err);
1700                         return err;
1701                 }
1702
1703                 dc->domain = tegra->domain;
1704         }
1705
1706         primary = tegra_dc_primary_plane_create(drm, dc);
1707         if (IS_ERR(primary)) {
1708                 err = PTR_ERR(primary);
1709                 goto cleanup;
1710         }
1711
1712         if (dc->soc->supports_cursor) {
1713                 cursor = tegra_dc_cursor_plane_create(drm, dc);
1714                 if (IS_ERR(cursor)) {
1715                         err = PTR_ERR(cursor);
1716                         goto cleanup;
1717                 }
1718         }
1719
1720         err = drm_crtc_init_with_planes(drm, &dc->base, primary, cursor,
1721                                         &tegra_crtc_funcs, NULL);
1722         if (err < 0)
1723                 goto cleanup;
1724
1725         drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
1726
1727         /*
1728          * Keep track of the minimum pitch alignment across all display
1729          * controllers.
1730          */
1731         if (dc->soc->pitch_align > tegra->pitch_align)
1732                 tegra->pitch_align = dc->soc->pitch_align;
1733
1734         err = tegra_dc_rgb_init(drm, dc);
1735         if (err < 0 && err != -ENODEV) {
1736                 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
1737                 goto cleanup;
1738         }
1739
1740         err = tegra_dc_add_planes(drm, dc);
1741         if (err < 0)
1742                 goto cleanup;
1743
1744         if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1745                 err = tegra_dc_debugfs_init(dc, drm->primary);
1746                 if (err < 0)
1747                         dev_err(dc->dev, "debugfs setup failed: %d\n", err);
1748         }
1749
1750         err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0,
1751                                dev_name(dc->dev), dc);
1752         if (err < 0) {
1753                 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq,
1754                         err);
1755                 goto cleanup;
1756         }
1757
1758         /* initialize display controller */
1759         if (dc->syncpt) {
1760                 u32 syncpt = host1x_syncpt_id(dc->syncpt);
1761
1762                 value = SYNCPT_CNTRL_NO_STALL;
1763                 tegra_dc_writel(dc, value, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
1764
1765                 value = SYNCPT_VSYNC_ENABLE | syncpt;
1766                 tegra_dc_writel(dc, value, DC_CMD_CONT_SYNCPT_VSYNC);
1767         }
1768
1769         value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1770                 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1771         tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
1772
1773         value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1774                 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1775         tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
1776
1777         /* initialize timer */
1778         value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) |
1779                 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20);
1780         tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY);
1781
1782         value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) |
1783                 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1);
1784         tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
1785
1786         value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1787                 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1788         tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
1789
1790         value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1791                 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1792         tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
1793
1794         if (dc->soc->supports_border_color)
1795                 tegra_dc_writel(dc, 0, DC_DISP_BORDER_COLOR);
1796
1797         tegra_dc_stats_reset(&dc->stats);
1798
1799         return 0;
1800
1801 cleanup:
1802         if (cursor)
1803                 drm_plane_cleanup(cursor);
1804
1805         if (primary)
1806                 drm_plane_cleanup(primary);
1807
1808         if (tegra->domain) {
1809                 iommu_detach_device(tegra->domain, dc->dev);
1810                 dc->domain = NULL;
1811         }
1812
1813         return err;
1814 }
1815
1816 static int tegra_dc_exit(struct host1x_client *client)
1817 {
1818         struct tegra_dc *dc = host1x_client_to_dc(client);
1819         int err;
1820
1821         devm_free_irq(dc->dev, dc->irq, dc);
1822
1823         if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1824                 err = tegra_dc_debugfs_exit(dc);
1825                 if (err < 0)
1826                         dev_err(dc->dev, "debugfs cleanup failed: %d\n", err);
1827         }
1828
1829         err = tegra_dc_rgb_exit(dc);
1830         if (err) {
1831                 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err);
1832                 return err;
1833         }
1834
1835         if (dc->domain) {
1836                 iommu_detach_device(dc->domain, dc->dev);
1837                 dc->domain = NULL;
1838         }
1839
1840         host1x_syncpt_free(dc->syncpt);
1841
1842         return 0;
1843 }
1844
1845 static const struct host1x_client_ops dc_client_ops = {
1846         .init = tegra_dc_init,
1847         .exit = tegra_dc_exit,
1848 };
1849
1850 static const struct tegra_dc_soc_info tegra20_dc_soc_info = {
1851         .supports_border_color = true,
1852         .supports_interlacing = false,
1853         .supports_cursor = false,
1854         .supports_block_linear = false,
1855         .pitch_align = 8,
1856         .has_powergate = false,
1857 };
1858
1859 static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
1860         .supports_border_color = true,
1861         .supports_interlacing = false,
1862         .supports_cursor = false,
1863         .supports_block_linear = false,
1864         .pitch_align = 8,
1865         .has_powergate = false,
1866 };
1867
1868 static const struct tegra_dc_soc_info tegra114_dc_soc_info = {
1869         .supports_border_color = true,
1870         .supports_interlacing = false,
1871         .supports_cursor = false,
1872         .supports_block_linear = false,
1873         .pitch_align = 64,
1874         .has_powergate = true,
1875 };
1876
1877 static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
1878         .supports_border_color = false,
1879         .supports_interlacing = true,
1880         .supports_cursor = true,
1881         .supports_block_linear = true,
1882         .pitch_align = 64,
1883         .has_powergate = true,
1884 };
1885
1886 static const struct tegra_dc_soc_info tegra210_dc_soc_info = {
1887         .supports_border_color = false,
1888         .supports_interlacing = true,
1889         .supports_cursor = true,
1890         .supports_block_linear = true,
1891         .pitch_align = 64,
1892         .has_powergate = true,
1893 };
1894
1895 static const struct of_device_id tegra_dc_of_match[] = {
1896         {
1897                 .compatible = "nvidia,tegra210-dc",
1898                 .data = &tegra210_dc_soc_info,
1899         }, {
1900                 .compatible = "nvidia,tegra124-dc",
1901                 .data = &tegra124_dc_soc_info,
1902         }, {
1903                 .compatible = "nvidia,tegra114-dc",
1904                 .data = &tegra114_dc_soc_info,
1905         }, {
1906                 .compatible = "nvidia,tegra30-dc",
1907                 .data = &tegra30_dc_soc_info,
1908         }, {
1909                 .compatible = "nvidia,tegra20-dc",
1910                 .data = &tegra20_dc_soc_info,
1911         }, {
1912                 /* sentinel */
1913         }
1914 };
1915 MODULE_DEVICE_TABLE(of, tegra_dc_of_match);
1916
1917 static int tegra_dc_parse_dt(struct tegra_dc *dc)
1918 {
1919         struct device_node *np;
1920         u32 value = 0;
1921         int err;
1922
1923         err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value);
1924         if (err < 0) {
1925                 dev_err(dc->dev, "missing \"nvidia,head\" property\n");
1926
1927                 /*
1928                  * If the nvidia,head property isn't present, try to find the
1929                  * correct head number by looking up the position of this
1930                  * display controller's node within the device tree. Assuming
1931                  * that the nodes are ordered properly in the DTS file and
1932                  * that the translation into a flattened device tree blob
1933                  * preserves that ordering this will actually yield the right
1934                  * head number.
1935                  *
1936                  * If those assumptions don't hold, this will still work for
1937                  * cases where only a single display controller is used.
1938                  */
1939                 for_each_matching_node(np, tegra_dc_of_match) {
1940                         if (np == dc->dev->of_node) {
1941                                 of_node_put(np);
1942                                 break;
1943                         }
1944
1945                         value++;
1946                 }
1947         }
1948
1949         dc->pipe = value;
1950
1951         return 0;
1952 }
1953
1954 static int tegra_dc_probe(struct platform_device *pdev)
1955 {
1956         const struct of_device_id *id;
1957         struct resource *regs;
1958         struct tegra_dc *dc;
1959         int err;
1960
1961         dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL);
1962         if (!dc)
1963                 return -ENOMEM;
1964
1965         id = of_match_node(tegra_dc_of_match, pdev->dev.of_node);
1966         if (!id)
1967                 return -ENODEV;
1968
1969         spin_lock_init(&dc->lock);
1970         INIT_LIST_HEAD(&dc->list);
1971         dc->dev = &pdev->dev;
1972         dc->soc = id->data;
1973
1974         err = tegra_dc_parse_dt(dc);
1975         if (err < 0)
1976                 return err;
1977
1978         dc->clk = devm_clk_get(&pdev->dev, NULL);
1979         if (IS_ERR(dc->clk)) {
1980                 dev_err(&pdev->dev, "failed to get clock\n");
1981                 return PTR_ERR(dc->clk);
1982         }
1983
1984         dc->rst = devm_reset_control_get(&pdev->dev, "dc");
1985         if (IS_ERR(dc->rst)) {
1986                 dev_err(&pdev->dev, "failed to get reset\n");
1987                 return PTR_ERR(dc->rst);
1988         }
1989
1990         if (dc->soc->has_powergate) {
1991                 if (dc->pipe == 0)
1992                         dc->powergate = TEGRA_POWERGATE_DIS;
1993                 else
1994                         dc->powergate = TEGRA_POWERGATE_DISB;
1995
1996                 err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk,
1997                                                         dc->rst);
1998                 if (err < 0) {
1999                         dev_err(&pdev->dev, "failed to power partition: %d\n",
2000                                 err);
2001                         return err;
2002                 }
2003         } else {
2004                 err = clk_prepare_enable(dc->clk);
2005                 if (err < 0) {
2006                         dev_err(&pdev->dev, "failed to enable clock: %d\n",
2007                                 err);
2008                         return err;
2009                 }
2010
2011                 err = reset_control_deassert(dc->rst);
2012                 if (err < 0) {
2013                         dev_err(&pdev->dev, "failed to deassert reset: %d\n",
2014                                 err);
2015                         return err;
2016                 }
2017         }
2018
2019         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2020         dc->regs = devm_ioremap_resource(&pdev->dev, regs);
2021         if (IS_ERR(dc->regs))
2022                 return PTR_ERR(dc->regs);
2023
2024         dc->irq = platform_get_irq(pdev, 0);
2025         if (dc->irq < 0) {
2026                 dev_err(&pdev->dev, "failed to get IRQ\n");
2027                 return -ENXIO;
2028         }
2029
2030         INIT_LIST_HEAD(&dc->client.list);
2031         dc->client.ops = &dc_client_ops;
2032         dc->client.dev = &pdev->dev;
2033
2034         err = tegra_dc_rgb_probe(dc);
2035         if (err < 0 && err != -ENODEV) {
2036                 dev_err(&pdev->dev, "failed to probe RGB output: %d\n", err);
2037                 return err;
2038         }
2039
2040         err = host1x_client_register(&dc->client);
2041         if (err < 0) {
2042                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
2043                         err);
2044                 return err;
2045         }
2046
2047         platform_set_drvdata(pdev, dc);
2048
2049         return 0;
2050 }
2051
2052 static int tegra_dc_remove(struct platform_device *pdev)
2053 {
2054         struct tegra_dc *dc = platform_get_drvdata(pdev);
2055         int err;
2056
2057         err = host1x_client_unregister(&dc->client);
2058         if (err < 0) {
2059                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
2060                         err);
2061                 return err;
2062         }
2063
2064         err = tegra_dc_rgb_remove(dc);
2065         if (err < 0) {
2066                 dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err);
2067                 return err;
2068         }
2069
2070         reset_control_assert(dc->rst);
2071
2072         if (dc->soc->has_powergate)
2073                 tegra_powergate_power_off(dc->powergate);
2074
2075         clk_disable_unprepare(dc->clk);
2076
2077         return 0;
2078 }
2079
2080 struct platform_driver tegra_dc_driver = {
2081         .driver = {
2082                 .name = "tegra-dc",
2083                 .of_match_table = tegra_dc_of_match,
2084         },
2085         .probe = tegra_dc_probe,
2086         .remove = tegra_dc_remove,
2087 };