drivers/gpu/drm/gma500/gma_display.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright © 2006-2011 Intel Corporation
   4  *
   5  * Authors:
   6  *      Eric Anholt <eric@anholt.net>
   7  *      Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
   8  */
   9
  10 #include <linux/delay.h>
  11 #include <linux/highmem.h>
  12
  13 #include <drm/drm_crtc.h>
  14 #include <drm/drm_fourcc.h>
  15 #include <drm/drm_vblank.h>
  16
  17 #include "framebuffer.h"
  18 #include "gma_display.h"
  19 #include "psb_drv.h"
  20 #include "psb_intel_drv.h"
  21 #include "psb_intel_reg.h"
  22
  23 /*
  24  * Returns whether any output on the specified pipe is of the specified type
  25  */
  26 bool gma_pipe_has_type(struct drm_crtc *crtc, int type)
  27 {
  28         struct drm_device *dev = crtc->dev;
  29         struct drm_mode_config *mode_config = &dev->mode_config;
  30         struct drm_connector *l_entry;
  31
  32         list_for_each_entry(l_entry, &mode_config->connector_list, head) {
  33                 if (l_entry->encoder && l_entry->encoder->crtc == crtc) {
  34                         struct gma_encoder *gma_encoder =
  35                                                 gma_attached_encoder(l_entry);
  36                         if (gma_encoder->type == type)
  37                                 return true;
  38                 }
  39         }
  40
  41         return false;
  42 }
  43
  44 void gma_wait_for_vblank(struct drm_device *dev)
  45 {
  46         /* Wait for 20ms, i.e. one cycle at 50hz. */
  47         mdelay(20);
  48 }
  49
  50 int gma_pipe_set_base(struct drm_crtc *crtc, int x, int y,
  51                       struct drm_framebuffer *old_fb)
  52 {
  53         struct drm_device *dev = crtc->dev;
  54         struct drm_psb_private *dev_priv = dev->dev_private;
  55         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
  56         struct drm_framebuffer *fb = crtc->primary->fb;
  57         struct gtt_range *gtt;
  58         int pipe = gma_crtc->pipe;
  59         const struct psb_offset *map = &dev_priv->regmap[pipe];
  60         unsigned long start, offset;
  61         u32 dspcntr;
  62         int ret = 0;
  63
  64         if (!gma_power_begin(dev, true))
  65                 return 0;
  66
  67         /* no fb bound */
  68         if (!fb) {
  69                 dev_err(dev->dev, "No FB bound\n");
  70                 goto gma_pipe_cleaner;
  71         }
  72
  73         gtt = to_gtt_range(fb->obj[0]);
  74
  75         /* We are displaying this buffer, make sure it is actually loaded
  76            into the GTT */
  77         ret = psb_gtt_pin(gtt);
  78         if (ret < 0)
  79                 goto gma_pipe_set_base_exit;
  80         start = gtt->offset;
  81         offset = y * fb->pitches[0] + x * fb->format->cpp[0];
  82
  83         REG_WRITE(map->stride, fb->pitches[0]);
  84
  85         dspcntr = REG_READ(map->cntr);
  86         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
  87
  88         switch (fb->format->cpp[0] * 8) {
  89         case 8:
  90                 dspcntr |= DISPPLANE_8BPP;
  91                 break;
  92         case 16:
  93                 if (fb->format->depth == 15)
  94                         dspcntr |= DISPPLANE_15_16BPP;
  95                 else
  96                         dspcntr |= DISPPLANE_16BPP;
  97                 break;
  98         case 24:
  99         case 32:
 100                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
 101                 break;
 102         default:
 103                 dev_err(dev->dev, "Unknown color depth\n");
 104                 ret = -EINVAL;
 105                 goto gma_pipe_set_base_exit;
 106         }
 107         REG_WRITE(map->cntr, dspcntr);
 108
 109         dev_dbg(dev->dev,
 110                 "Writing base %08lX %08lX %d %d\n", start, offset, x, y);
 111
 112         /* FIXME: Investigate whether this really is the base for psb and why
 113                   the linear offset is named base for the other chips. map->surf
 114                   should be the base and map->linoff the offset for all chips */
 115         if (IS_PSB(dev)) {
 116                 REG_WRITE(map->base, offset + start);
 117                 REG_READ(map->base);
 118         } else {
 119                 REG_WRITE(map->base, offset);
 120                 REG_READ(map->base);
 121                 REG_WRITE(map->surf, start);
 122                 REG_READ(map->surf);
 123         }
 124
 125 gma_pipe_cleaner:
 126         /* If there was a previous display we can now unpin it */
 127         if (old_fb)
 128                 psb_gtt_unpin(to_gtt_range(old_fb->obj[0]));
 129
 130 gma_pipe_set_base_exit:
 131         gma_power_end(dev);
 132         return ret;
 133 }
 134
 135 /* Loads the palette/gamma unit for the CRTC with the prepared values */
 136 void gma_crtc_load_lut(struct drm_crtc *crtc)
 137 {
 138         struct drm_device *dev = crtc->dev;
 139         struct drm_psb_private *dev_priv = dev->dev_private;
 140         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 141         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 142         int palreg = map->palette;
 143         u16 *r, *g, *b;
 144         int i;
 145
 146         /* The clocks have to be on to load the palette. */
 147         if (!crtc->enabled)
 148                 return;
 149
 150         r = crtc->gamma_store;
 151         g = r + crtc->gamma_size;
 152         b = g + crtc->gamma_size;
 153
 154         if (gma_power_begin(dev, false)) {
 155                 for (i = 0; i < 256; i++) {
 156                         REG_WRITE(palreg + 4 * i,
 157                                   (((*r++ >> 8) + gma_crtc->lut_adj[i]) << 16) |
 158                                   (((*g++ >> 8) + gma_crtc->lut_adj[i]) << 8) |
 159                                   ((*b++ >> 8) + gma_crtc->lut_adj[i]));
 160                 }
 161                 gma_power_end(dev);
 162         } else {
 163                 for (i = 0; i < 256; i++) {
 164                         /* FIXME: Why pipe[0] and not pipe[..._crtc->pipe]? */
 165                         dev_priv->regs.pipe[0].palette[i] =
 166                                 (((*r++ >> 8) + gma_crtc->lut_adj[i]) << 16) |
 167                                 (((*g++ >> 8) + gma_crtc->lut_adj[i]) << 8) |
 168                                 ((*b++ >> 8) + gma_crtc->lut_adj[i]);
 169                 }
 170
 171         }
 172 }
 173
 174 int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue,
 175                        u32 size,
 176                        struct drm_modeset_acquire_ctx *ctx)
 177 {
 178         gma_crtc_load_lut(crtc);
 179
 180         return 0;
 181 }
 182
 183 /*
 184  * Sets the power management mode of the pipe and plane.
 185  *
 186  * This code should probably grow support for turning the cursor off and back
 187  * on appropriately at the same time as we're turning the pipe off/on.
 188  */
 189 void gma_crtc_dpms(struct drm_crtc *crtc, int mode)
 190 {
 191         struct drm_device *dev = crtc->dev;
 192         struct drm_psb_private *dev_priv = dev->dev_private;
 193         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 194         int pipe = gma_crtc->pipe;
 195         const struct psb_offset *map = &dev_priv->regmap[pipe];
 196         u32 temp;
 197
 198         /* XXX: When our outputs are all unaware of DPMS modes other than off
 199          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
 200          */
 201
 202         if (IS_CDV(dev))
 203                 dev_priv->ops->disable_sr(dev);
 204
 205         switch (mode) {
 206         case DRM_MODE_DPMS_ON:
 207         case DRM_MODE_DPMS_STANDBY:
 208         case DRM_MODE_DPMS_SUSPEND:
 209                 if (gma_crtc->active)
 210                         break;
 211
 212                 gma_crtc->active = true;
 213
 214                 /* Enable the DPLL */
 215                 temp = REG_READ(map->dpll);
 216                 if ((temp & DPLL_VCO_ENABLE) == 0) {
 217                         REG_WRITE(map->dpll, temp);
 218                         REG_READ(map->dpll);
 219                         /* Wait for the clocks to stabilize. */
 220                         udelay(150);
 221                         REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
 222                         REG_READ(map->dpll);
 223                         /* Wait for the clocks to stabilize. */
 224                         udelay(150);
 225                         REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
 226                         REG_READ(map->dpll);
 227                         /* Wait for the clocks to stabilize. */
 228                         udelay(150);
 229                 }
 230
 231                 /* Enable the plane */
 232                 temp = REG_READ(map->cntr);
 233                 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
 234                         REG_WRITE(map->cntr,
 235                                   temp | DISPLAY_PLANE_ENABLE);
 236                         /* Flush the plane changes */
 237                         REG_WRITE(map->base, REG_READ(map->base));
 238                 }
 239
 240                 udelay(150);
 241
 242                 /* Enable the pipe */
 243                 temp = REG_READ(map->conf);
 244                 if ((temp & PIPEACONF_ENABLE) == 0)
 245                         REG_WRITE(map->conf, temp | PIPEACONF_ENABLE);
 246
 247                 temp = REG_READ(map->status);
 248                 temp &= ~(0xFFFF);
 249                 temp |= PIPE_FIFO_UNDERRUN;
 250                 REG_WRITE(map->status, temp);
 251                 REG_READ(map->status);
 252
 253                 gma_crtc_load_lut(crtc);
 254
 255                 /* Give the overlay scaler a chance to enable
 256                  * if it's on this pipe */
 257                 /* psb_intel_crtc_dpms_video(crtc, true); TODO */
 258
 259                 drm_crtc_vblank_on(crtc);
 260                 break;
 261         case DRM_MODE_DPMS_OFF:
 262                 if (!gma_crtc->active)
 263                         break;
 264
 265                 gma_crtc->active = false;
 266
 267                 /* Give the overlay scaler a chance to disable
 268                  * if it's on this pipe */
 269                 /* psb_intel_crtc_dpms_video(crtc, FALSE); TODO */
 270
 271                 /* Disable the VGA plane that we never use */
 272                 REG_WRITE(VGACNTRL, VGA_DISP_DISABLE);
 273
 274                 /* Turn off vblank interrupts */
 275                 drm_crtc_vblank_off(crtc);
 276
 277                 /* Wait for vblank for the disable to take effect */
 278                 gma_wait_for_vblank(dev);
 279
 280                 /* Disable plane */
 281                 temp = REG_READ(map->cntr);
 282                 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
 283                         REG_WRITE(map->cntr,
 284                                   temp & ~DISPLAY_PLANE_ENABLE);
 285                         /* Flush the plane changes */
 286                         REG_WRITE(map->base, REG_READ(map->base));
 287                         REG_READ(map->base);
 288                 }
 289
 290                 /* Disable pipe */
 291                 temp = REG_READ(map->conf);
 292                 if ((temp & PIPEACONF_ENABLE) != 0) {
 293                         REG_WRITE(map->conf, temp & ~PIPEACONF_ENABLE);
 294                         REG_READ(map->conf);
 295                 }
 296
 297                 /* Wait for vblank for the disable to take effect. */
 298                 gma_wait_for_vblank(dev);
 299
 300                 udelay(150);
 301
 302                 /* Disable DPLL */
 303                 temp = REG_READ(map->dpll);
 304                 if ((temp & DPLL_VCO_ENABLE) != 0) {
 305                         REG_WRITE(map->dpll, temp & ~DPLL_VCO_ENABLE);
 306                         REG_READ(map->dpll);
 307                 }
 308
 309                 /* Wait for the clocks to turn off. */
 310                 udelay(150);
 311                 break;
 312         }
 313
 314         if (IS_CDV(dev))
 315                 dev_priv->ops->update_wm(dev, crtc);
 316
 317         /* Set FIFO watermarks */
 318         REG_WRITE(DSPARB, 0x3F3E);
 319 }
 320
 321 int gma_crtc_cursor_set(struct drm_crtc *crtc,
 322                         struct drm_file *file_priv,
 323                         uint32_t handle,
 324                         uint32_t width, uint32_t height)
 325 {
 326         struct drm_device *dev = crtc->dev;
 327         struct drm_psb_private *dev_priv = dev->dev_private;
 328         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 329         int pipe = gma_crtc->pipe;
 330         uint32_t control = (pipe == 0) ? CURACNTR : CURBCNTR;
 331         uint32_t base = (pipe == 0) ? CURABASE : CURBBASE;
 332         uint32_t temp;
 333         size_t addr = 0;
 334         struct gtt_range *gt;
 335         struct gtt_range *cursor_gt = gma_crtc->cursor_gt;
 336         struct drm_gem_object *obj;
 337         void *tmp_dst, *tmp_src;
 338         int ret = 0, i, cursor_pages;
 339
 340         /* If we didn't get a handle then turn the cursor off */
 341         if (!handle) {
 342                 temp = CURSOR_MODE_DISABLE;
 343                 if (gma_power_begin(dev, false)) {
 344                         REG_WRITE(control, temp);
 345                         REG_WRITE(base, 0);
 346                         gma_power_end(dev);
 347                 }
 348
 349                 /* Unpin the old GEM object */
 350                 if (gma_crtc->cursor_obj) {
 351                         gt = container_of(gma_crtc->cursor_obj,
 352                                           struct gtt_range, gem);
 353                         psb_gtt_unpin(gt);
 354                         drm_gem_object_put(gma_crtc->cursor_obj);
 355                         gma_crtc->cursor_obj = NULL;
 356                 }
 357                 return 0;
 358         }
 359
 360         /* Currently we only support 64x64 cursors */
 361         if (width != 64 || height != 64) {
 362                 dev_dbg(dev->dev, "We currently only support 64x64 cursors\n");
 363                 return -EINVAL;
 364         }
 365
 366         obj = drm_gem_object_lookup(file_priv, handle);
 367         if (!obj) {
 368                 ret = -ENOENT;
 369                 goto unlock;
 370         }
 371
 372         if (obj->size < width * height * 4) {
 373                 dev_dbg(dev->dev, "Buffer is too small\n");
 374                 ret = -ENOMEM;
 375                 goto unref_cursor;
 376         }
 377
 378         gt = container_of(obj, struct gtt_range, gem);
 379
 380         /* Pin the memory into the GTT */
 381         ret = psb_gtt_pin(gt);
 382         if (ret) {
 383                 dev_err(dev->dev, "Can not pin down handle 0x%x\n", handle);
 384                 goto unref_cursor;
 385         }
 386
 387         if (dev_priv->ops->cursor_needs_phys) {
 388                 if (cursor_gt == NULL) {
 389                         dev_err(dev->dev, "No hardware cursor mem available");
 390                         ret = -ENOMEM;
 391                         goto unref_cursor;
 392                 }
 393
 394                 /* Prevent overflow */
 395                 if (gt->npage > 4)
 396                         cursor_pages = 4;
 397                 else
 398                         cursor_pages = gt->npage;
 399
 400                 /* Copy the cursor to cursor mem */
 401                 tmp_dst = dev_priv->vram_addr + cursor_gt->offset;
 402                 for (i = 0; i < cursor_pages; i++) {
 403                         tmp_src = kmap(gt->pages[i]);
 404                         memcpy(tmp_dst, tmp_src, PAGE_SIZE);
 405                         kunmap(gt->pages[i]);
 406                         tmp_dst += PAGE_SIZE;
 407                 }
 408
 409                 addr = gma_crtc->cursor_addr;
 410         } else {
 411                 addr = gt->offset;
 412                 gma_crtc->cursor_addr = addr;
 413         }
 414
 415         temp = 0;
 416         /* set the pipe for the cursor */
 417         temp |= (pipe << 28);
 418         temp |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
 419
 420         if (gma_power_begin(dev, false)) {
 421                 REG_WRITE(control, temp);
 422                 REG_WRITE(base, addr);
 423                 gma_power_end(dev);
 424         }
 425
 426         /* unpin the old bo */
 427         if (gma_crtc->cursor_obj) {
 428                 gt = container_of(gma_crtc->cursor_obj, struct gtt_range, gem);
 429                 psb_gtt_unpin(gt);
 430                 drm_gem_object_put(gma_crtc->cursor_obj);
 431         }
 432
 433         gma_crtc->cursor_obj = obj;
 434 unlock:
 435         return ret;
 436
 437 unref_cursor:
 438         drm_gem_object_put(obj);
 439         return ret;
 440 }
 441
 442 int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 443 {
 444         struct drm_device *dev = crtc->dev;
 445         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 446         int pipe = gma_crtc->pipe;
 447         uint32_t temp = 0;
 448         uint32_t addr;
 449
 450         if (x < 0) {
 451                 temp |= (CURSOR_POS_SIGN << CURSOR_X_SHIFT);
 452                 x = -x;
 453         }
 454         if (y < 0) {
 455                 temp |= (CURSOR_POS_SIGN << CURSOR_Y_SHIFT);
 456                 y = -y;
 457         }
 458
 459         temp |= ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT);
 460         temp |= ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
 461
 462         addr = gma_crtc->cursor_addr;
 463
 464         if (gma_power_begin(dev, false)) {
 465                 REG_WRITE((pipe == 0) ? CURAPOS : CURBPOS, temp);
 466                 REG_WRITE((pipe == 0) ? CURABASE : CURBBASE, addr);
 467                 gma_power_end(dev);
 468         }
 469         return 0;
 470 }
 471
 472 void gma_crtc_prepare(struct drm_crtc *crtc)
 473 {
 474         const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 475         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 476 }
 477
 478 void gma_crtc_commit(struct drm_crtc *crtc)
 479 {
 480         const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 481         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 482 }
 483
 484 void gma_crtc_disable(struct drm_crtc *crtc)
 485 {
 486         struct gtt_range *gt;
 487         const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 488
 489         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 490
 491         if (crtc->primary->fb) {
 492                 gt = to_gtt_range(crtc->primary->fb->obj[0]);
 493                 psb_gtt_unpin(gt);
 494         }
 495 }
 496
 497 void gma_crtc_destroy(struct drm_crtc *crtc)
 498 {
 499         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 500
 501         kfree(gma_crtc->crtc_state);
 502         drm_crtc_cleanup(crtc);
 503         kfree(gma_crtc);
 504 }
 505
 506 int gma_crtc_page_flip(struct drm_crtc *crtc,
 507                        struct drm_framebuffer *fb,
 508                        struct drm_pending_vblank_event *event,
 509                        uint32_t page_flip_flags,
 510                        struct drm_modeset_acquire_ctx *ctx)
 511 {
 512         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 513         struct drm_framebuffer *current_fb = crtc->primary->fb;
 514         struct drm_framebuffer *old_fb = crtc->primary->old_fb;
 515         const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 516         struct drm_device *dev = crtc->dev;
 517         unsigned long flags;
 518         int ret;
 519
 520         if (!crtc_funcs->mode_set_base)
 521                 return -EINVAL;
 522
 523         /* Using mode_set_base requires the new fb to be set already. */
 524         crtc->primary->fb = fb;
 525
 526         if (event) {
 527                 spin_lock_irqsave(&dev->event_lock, flags);
 528
 529                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 530
 531                 gma_crtc->page_flip_event = event;
 532
 533                 /* Call this locked if we want an event at vblank interrupt. */
 534                 ret = crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, old_fb);
 535                 if (ret) {
 536                         gma_crtc->page_flip_event = NULL;
 537                         drm_crtc_vblank_put(crtc);
 538                 }
 539
 540                 spin_unlock_irqrestore(&dev->event_lock, flags);
 541         } else {
 542                 ret = crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, old_fb);
 543         }
 544
 545         /* Restore previous fb in case of failure. */
 546         if (ret)
 547                 crtc->primary->fb = current_fb;
 548
 549         return ret;
 550 }
 551
 552 int gma_crtc_set_config(struct drm_mode_set *set,
 553                         struct drm_modeset_acquire_ctx *ctx)
 554 {
 555         struct drm_device *dev = set->crtc->dev;
 556         struct drm_psb_private *dev_priv = dev->dev_private;
 557         int ret;
 558
 559         if (!dev_priv->rpm_enabled)
 560                 return drm_crtc_helper_set_config(set, ctx);
 561
 562         pm_runtime_forbid(dev->dev);
 563         ret = drm_crtc_helper_set_config(set, ctx);
 564         pm_runtime_allow(dev->dev);
 565
 566         return ret;
 567 }
 568
 569 /*
 570  * Save HW states of given crtc
 571  */
 572 void gma_crtc_save(struct drm_crtc *crtc)
 573 {
 574         struct drm_device *dev = crtc->dev;
 575         struct drm_psb_private *dev_priv = dev->dev_private;
 576         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 577         struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
 578         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 579         uint32_t palette_reg;
 580         int i;
 581
 582         if (!crtc_state) {
 583                 dev_err(dev->dev, "No CRTC state found\n");
 584                 return;
 585         }
 586
 587         crtc_state->saveDSPCNTR = REG_READ(map->cntr);
 588         crtc_state->savePIPECONF = REG_READ(map->conf);
 589         crtc_state->savePIPESRC = REG_READ(map->src);
 590         crtc_state->saveFP0 = REG_READ(map->fp0);
 591         crtc_state->saveFP1 = REG_READ(map->fp1);
 592         crtc_state->saveDPLL = REG_READ(map->dpll);
 593         crtc_state->saveHTOTAL = REG_READ(map->htotal);
 594         crtc_state->saveHBLANK = REG_READ(map->hblank);
 595         crtc_state->saveHSYNC = REG_READ(map->hsync);
 596         crtc_state->saveVTOTAL = REG_READ(map->vtotal);
 597         crtc_state->saveVBLANK = REG_READ(map->vblank);
 598         crtc_state->saveVSYNC = REG_READ(map->vsync);
 599         crtc_state->saveDSPSTRIDE = REG_READ(map->stride);
 600
 601         /* NOTE: DSPSIZE DSPPOS only for psb */
 602         crtc_state->saveDSPSIZE = REG_READ(map->size);
 603         crtc_state->saveDSPPOS = REG_READ(map->pos);
 604
 605         crtc_state->saveDSPBASE = REG_READ(map->base);
 606
 607         palette_reg = map->palette;
 608         for (i = 0; i < 256; ++i)
 609                 crtc_state->savePalette[i] = REG_READ(palette_reg + (i << 2));
 610 }
 611
 612 /*
 613  * Restore HW states of given crtc
 614  */
 615 void gma_crtc_restore(struct drm_crtc *crtc)
 616 {
 617         struct drm_device *dev = crtc->dev;
 618         struct drm_psb_private *dev_priv = dev->dev_private;
 619         struct gma_crtc *gma_crtc =  to_gma_crtc(crtc);
 620         struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
 621         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 622         uint32_t palette_reg;
 623         int i;
 624
 625         if (!crtc_state) {
 626                 dev_err(dev->dev, "No crtc state\n");
 627                 return;
 628         }
 629
 630         if (crtc_state->saveDPLL & DPLL_VCO_ENABLE) {
 631                 REG_WRITE(map->dpll,
 632                         crtc_state->saveDPLL & ~DPLL_VCO_ENABLE);
 633                 REG_READ(map->dpll);
 634                 udelay(150);
 635         }
 636
 637         REG_WRITE(map->fp0, crtc_state->saveFP0);
 638         REG_READ(map->fp0);
 639
 640         REG_WRITE(map->fp1, crtc_state->saveFP1);
 641         REG_READ(map->fp1);
 642
 643         REG_WRITE(map->dpll, crtc_state->saveDPLL);
 644         REG_READ(map->dpll);
 645         udelay(150);
 646
 647         REG_WRITE(map->htotal, crtc_state->saveHTOTAL);
 648         REG_WRITE(map->hblank, crtc_state->saveHBLANK);
 649         REG_WRITE(map->hsync, crtc_state->saveHSYNC);
 650         REG_WRITE(map->vtotal, crtc_state->saveVTOTAL);
 651         REG_WRITE(map->vblank, crtc_state->saveVBLANK);
 652         REG_WRITE(map->vsync, crtc_state->saveVSYNC);
 653         REG_WRITE(map->stride, crtc_state->saveDSPSTRIDE);
 654
 655         REG_WRITE(map->size, crtc_state->saveDSPSIZE);
 656         REG_WRITE(map->pos, crtc_state->saveDSPPOS);
 657
 658         REG_WRITE(map->src, crtc_state->savePIPESRC);
 659         REG_WRITE(map->base, crtc_state->saveDSPBASE);
 660         REG_WRITE(map->conf, crtc_state->savePIPECONF);
 661
 662         gma_wait_for_vblank(dev);
 663
 664         REG_WRITE(map->cntr, crtc_state->saveDSPCNTR);
 665         REG_WRITE(map->base, crtc_state->saveDSPBASE);
 666
 667         gma_wait_for_vblank(dev);
 668
 669         palette_reg = map->palette;
 670         for (i = 0; i < 256; ++i)
 671                 REG_WRITE(palette_reg + (i << 2), crtc_state->savePalette[i]);
 672 }
 673
 674 void gma_encoder_prepare(struct drm_encoder *encoder)
 675 {
 676         const struct drm_encoder_helper_funcs *encoder_funcs =
 677             encoder->helper_private;
 678         /* lvds has its own version of prepare see psb_intel_lvds_prepare */
 679         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
 680 }
 681
 682 void gma_encoder_commit(struct drm_encoder *encoder)
 683 {
 684         const struct drm_encoder_helper_funcs *encoder_funcs =
 685             encoder->helper_private;
 686         /* lvds has its own version of commit see psb_intel_lvds_commit */
 687         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 688 }
 689
 690 void gma_encoder_destroy(struct drm_encoder *encoder)
 691 {
 692         struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
 693
 694         drm_encoder_cleanup(encoder);
 695         kfree(intel_encoder);
 696 }
 697
 698 /* Currently there is only a 1:1 mapping of encoders and connectors */
 699 struct drm_encoder *gma_best_encoder(struct drm_connector *connector)
 700 {
 701         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 702
 703         return &gma_encoder->base;
 704 }
 705
 706 void gma_connector_attach_encoder(struct gma_connector *connector,
 707                                   struct gma_encoder *encoder)
 708 {
 709         connector->encoder = encoder;
 710         drm_connector_attach_encoder(&connector->base,
 711                                           &encoder->base);
 712 }
 713
 714 #define GMA_PLL_INVALID(s) { /* DRM_ERROR(s); */ return false; }
 715
 716 bool gma_pll_is_valid(struct drm_crtc *crtc,
 717                       const struct gma_limit_t *limit,
 718                       struct gma_clock_t *clock)
 719 {
 720         if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
 721                 GMA_PLL_INVALID("p1 out of range");
 722         if (clock->p < limit->p.min || limit->p.max < clock->p)
 723                 GMA_PLL_INVALID("p out of range");
 724         if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
 725                 GMA_PLL_INVALID("m2 out of range");
 726         if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
 727                 GMA_PLL_INVALID("m1 out of range");
 728         /* On CDV m1 is always 0 */
 729         if (clock->m1 <= clock->m2 && clock->m1 != 0)
 730                 GMA_PLL_INVALID("m1 <= m2 && m1 != 0");
 731         if (clock->m < limit->m.min || limit->m.max < clock->m)
 732                 GMA_PLL_INVALID("m out of range");
 733         if (clock->n < limit->n.min || limit->n.max < clock->n)
 734                 GMA_PLL_INVALID("n out of range");
 735         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 736                 GMA_PLL_INVALID("vco out of range");
 737         /* XXX: We may need to be checking "Dot clock"
 738          * depending on the multiplier, connector, etc.,
 739          * rather than just a single range.
 740          */
 741         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 742                 GMA_PLL_INVALID("dot out of range");
 743
 744         return true;
 745 }
 746
 747 bool gma_find_best_pll(const struct gma_limit_t *limit,
 748                        struct drm_crtc *crtc, int target, int refclk,
 749                        struct gma_clock_t *best_clock)
 750 {
 751         struct drm_device *dev = crtc->dev;
 752         const struct gma_clock_funcs *clock_funcs =
 753                                                 to_gma_crtc(crtc)->clock_funcs;
 754         struct gma_clock_t clock;
 755         int err = target;
 756
 757         if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
 758             (REG_READ(LVDS) & LVDS_PORT_EN) != 0) {
 759                 /*
 760                  * For LVDS, if the panel is on, just rely on its current
 761                  * settings for dual-channel.  We haven't figured out how to
 762                  * reliably set up different single/dual channel state, if we
 763                  * even can.
 764                  */
 765                 if ((REG_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
 766                     LVDS_CLKB_POWER_UP)
 767                         clock.p2 = limit->p2.p2_fast;
 768                 else
 769                         clock.p2 = limit->p2.p2_slow;
 770         } else {
 771                 if (target < limit->p2.dot_limit)
 772                         clock.p2 = limit->p2.p2_slow;
 773                 else
 774                         clock.p2 = limit->p2.p2_fast;
 775         }
 776
 777         memset(best_clock, 0, sizeof(*best_clock));
 778
 779         /* m1 is always 0 on CDV so the outmost loop will run just once */
 780         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
 781                 for (clock.m2 = limit->m2.min;
 782                      (clock.m2 < clock.m1 || clock.m1 == 0) &&
 783                       clock.m2 <= limit->m2.max; clock.m2++) {
 784                         for (clock.n = limit->n.min;
 785                              clock.n <= limit->n.max; clock.n++) {
 786                                 for (clock.p1 = limit->p1.min;
 787                                      clock.p1 <= limit->p1.max;
 788                                      clock.p1++) {
 789                                         int this_err;
 790
 791                                         clock_funcs->clock(refclk, &clock);
 792
 793                                         if (!clock_funcs->pll_is_valid(crtc,
 794                                                                 limit, &clock))
 795                                                 continue;
 796
 797                                         this_err = abs(clock.dot - target);
 798                                         if (this_err < err) {
 799                                                 *best_clock = clock;
 800                                                 err = this_err;
 801                                         }
 802                                 }
 803                         }
 804                 }
 805         }
 806
 807         return err != target;
 808 }