drivers/gpu/drm/gma500/gma_display.c

   1 /*
   2  * Copyright © 2006-2011 Intel Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  16  *
  17  * Authors:
  18  *      Eric Anholt <eric@anholt.net>
  19  *      Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
  20  */
  21
  22 #include <drm/drmP.h>
  23 #include "gma_display.h"
  24 #include "psb_intel_drv.h"
  25 #include "psb_intel_reg.h"
  26 #include "psb_drv.h"
  27 #include "framebuffer.h"
  28
  29 /**
  30  * Returns whether any output on the specified pipe is of the specified type
  31  */
  32 bool gma_pipe_has_type(struct drm_crtc *crtc, int type)
  33 {
  34         struct drm_device *dev = crtc->dev;
  35         struct drm_mode_config *mode_config = &dev->mode_config;
  36         struct drm_connector *l_entry;
  37
  38         list_for_each_entry(l_entry, &mode_config->connector_list, head) {
  39                 if (l_entry->encoder && l_entry->encoder->crtc == crtc) {
  40                         struct gma_encoder *gma_encoder =
  41                                                 gma_attached_encoder(l_entry);
  42                         if (gma_encoder->type == type)
  43                                 return true;
  44                 }
  45         }
  46
  47         return false;
  48 }
  49
  50 void gma_wait_for_vblank(struct drm_device *dev)
  51 {
  52         /* Wait for 20ms, i.e. one cycle at 50hz. */
  53         mdelay(20);
  54 }
  55
  56 int gma_pipe_set_base(struct drm_crtc *crtc, int x, int y,
  57                       struct drm_framebuffer *old_fb)
  58 {
  59         struct drm_device *dev = crtc->dev;
  60         struct drm_psb_private *dev_priv = dev->dev_private;
  61         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
  62         struct psb_framebuffer *psbfb = to_psb_fb(crtc->fb);
  63         int pipe = gma_crtc->pipe;
  64         const struct psb_offset *map = &dev_priv->regmap[pipe];
  65         unsigned long start, offset;
  66         u32 dspcntr;
  67         int ret = 0;
  68
  69         if (!gma_power_begin(dev, true))
  70                 return 0;
  71
  72         /* no fb bound */
  73         if (!crtc->fb) {
  74                 dev_err(dev->dev, "No FB bound\n");
  75                 goto gma_pipe_cleaner;
  76         }
  77
  78         /* We are displaying this buffer, make sure it is actually loaded
  79            into the GTT */
  80         ret = psb_gtt_pin(psbfb->gtt);
  81         if (ret < 0)
  82                 goto gma_pipe_set_base_exit;
  83         start = psbfb->gtt->offset;
  84         offset = y * crtc->fb->pitches[0] + x * (crtc->fb->bits_per_pixel / 8);
  85
  86         REG_WRITE(map->stride, crtc->fb->pitches[0]);
  87
  88         dspcntr = REG_READ(map->cntr);
  89         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
  90
  91         switch (crtc->fb->bits_per_pixel) {
  92         case 8:
  93                 dspcntr |= DISPPLANE_8BPP;
  94                 break;
  95         case 16:
  96                 if (crtc->fb->depth == 15)
  97                         dspcntr |= DISPPLANE_15_16BPP;
  98                 else
  99                         dspcntr |= DISPPLANE_16BPP;
 100                 break;
 101         case 24:
 102         case 32:
 103                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
 104                 break;
 105         default:
 106                 dev_err(dev->dev, "Unknown color depth\n");
 107                 ret = -EINVAL;
 108                 goto gma_pipe_set_base_exit;
 109         }
 110         REG_WRITE(map->cntr, dspcntr);
 111
 112         dev_dbg(dev->dev,
 113                 "Writing base %08lX %08lX %d %d\n", start, offset, x, y);
 114
 115         /* FIXME: Investigate whether this really is the base for psb and why
 116                   the linear offset is named base for the other chips. map->surf
 117                   should be the base and map->linoff the offset for all chips */
 118         if (IS_PSB(dev)) {
 119                 REG_WRITE(map->base, offset + start);
 120                 REG_READ(map->base);
 121         } else {
 122                 REG_WRITE(map->base, offset);
 123                 REG_READ(map->base);
 124                 REG_WRITE(map->surf, start);
 125                 REG_READ(map->surf);
 126         }
 127
 128 gma_pipe_cleaner:
 129         /* If there was a previous display we can now unpin it */
 130         if (old_fb)
 131                 psb_gtt_unpin(to_psb_fb(old_fb)->gtt);
 132
 133 gma_pipe_set_base_exit:
 134         gma_power_end(dev);
 135         return ret;
 136 }
 137
 138 /* Loads the palette/gamma unit for the CRTC with the prepared values */
 139 void gma_crtc_load_lut(struct drm_crtc *crtc)
 140 {
 141         struct drm_device *dev = crtc->dev;
 142         struct drm_psb_private *dev_priv = dev->dev_private;
 143         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 144         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 145         int palreg = map->palette;
 146         int i;
 147
 148         /* The clocks have to be on to load the palette. */
 149         if (!crtc->enabled)
 150                 return;
 151
 152         if (gma_power_begin(dev, false)) {
 153                 for (i = 0; i < 256; i++) {
 154                         REG_WRITE(palreg + 4 * i,
 155                                   ((gma_crtc->lut_r[i] +
 156                                   gma_crtc->lut_adj[i]) << 16) |
 157                                   ((gma_crtc->lut_g[i] +
 158                                   gma_crtc->lut_adj[i]) << 8) |
 159                                   (gma_crtc->lut_b[i] +
 160                                   gma_crtc->lut_adj[i]));
 161                 }
 162                 gma_power_end(dev);
 163         } else {
 164                 for (i = 0; i < 256; i++) {
 165                         /* FIXME: Why pipe[0] and not pipe[..._crtc->pipe]? */
 166                         dev_priv->regs.pipe[0].palette[i] =
 167                                   ((gma_crtc->lut_r[i] +
 168                                   gma_crtc->lut_adj[i]) << 16) |
 169                                   ((gma_crtc->lut_g[i] +
 170                                   gma_crtc->lut_adj[i]) << 8) |
 171                                   (gma_crtc->lut_b[i] +
 172                                   gma_crtc->lut_adj[i]);
 173                 }
 174
 175         }
 176 }
 177
 178 void gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue,
 179                         u32 start, u32 size)
 180 {
 181         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 182         int i;
 183         int end = (start + size > 256) ? 256 : start + size;
 184
 185         for (i = start; i < end; i++) {
 186                 gma_crtc->lut_r[i] = red[i] >> 8;
 187                 gma_crtc->lut_g[i] = green[i] >> 8;
 188                 gma_crtc->lut_b[i] = blue[i] >> 8;
 189         }
 190
 191         gma_crtc_load_lut(crtc);
 192 }
 193
 194 /**
 195  * Sets the power management mode of the pipe and plane.
 196  *
 197  * This code should probably grow support for turning the cursor off and back
 198  * on appropriately at the same time as we're turning the pipe off/on.
 199  */
 200 void gma_crtc_dpms(struct drm_crtc *crtc, int mode)
 201 {
 202         struct drm_device *dev = crtc->dev;
 203         struct drm_psb_private *dev_priv = dev->dev_private;
 204         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 205         int pipe = gma_crtc->pipe;
 206         const struct psb_offset *map = &dev_priv->regmap[pipe];
 207         u32 temp;
 208
 209         /* XXX: When our outputs are all unaware of DPMS modes other than off
 210          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
 211          */
 212
 213         if (IS_CDV(dev))
 214                 dev_priv->ops->disable_sr(dev);
 215
 216         switch (mode) {
 217         case DRM_MODE_DPMS_ON:
 218         case DRM_MODE_DPMS_STANDBY:
 219         case DRM_MODE_DPMS_SUSPEND:
 220                 if (gma_crtc->active)
 221                         break;
 222
 223                 gma_crtc->active = true;
 224
 225                 /* Enable the DPLL */
 226                 temp = REG_READ(map->dpll);
 227                 if ((temp & DPLL_VCO_ENABLE) == 0) {
 228                         REG_WRITE(map->dpll, temp);
 229                         REG_READ(map->dpll);
 230                         /* Wait for the clocks to stabilize. */
 231                         udelay(150);
 232                         REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
 233                         REG_READ(map->dpll);
 234                         /* Wait for the clocks to stabilize. */
 235                         udelay(150);
 236                         REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
 237                         REG_READ(map->dpll);
 238                         /* Wait for the clocks to stabilize. */
 239                         udelay(150);
 240                 }
 241
 242                 /* Enable the plane */
 243                 temp = REG_READ(map->cntr);
 244                 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
 245                         REG_WRITE(map->cntr,
 246                                   temp | DISPLAY_PLANE_ENABLE);
 247                         /* Flush the plane changes */
 248                         REG_WRITE(map->base, REG_READ(map->base));
 249                 }
 250
 251                 udelay(150);
 252
 253                 /* Enable the pipe */
 254                 temp = REG_READ(map->conf);
 255                 if ((temp & PIPEACONF_ENABLE) == 0)
 256                         REG_WRITE(map->conf, temp | PIPEACONF_ENABLE);
 257
 258                 temp = REG_READ(map->status);
 259                 temp &= ~(0xFFFF);
 260                 temp |= PIPE_FIFO_UNDERRUN;
 261                 REG_WRITE(map->status, temp);
 262                 REG_READ(map->status);
 263
 264                 gma_crtc_load_lut(crtc);
 265
 266                 /* Give the overlay scaler a chance to enable
 267                  * if it's on this pipe */
 268                 /* psb_intel_crtc_dpms_video(crtc, true); TODO */
 269                 break;
 270         case DRM_MODE_DPMS_OFF:
 271                 if (!gma_crtc->active)
 272                         break;
 273
 274                 gma_crtc->active = false;
 275
 276                 /* Give the overlay scaler a chance to disable
 277                  * if it's on this pipe */
 278                 /* psb_intel_crtc_dpms_video(crtc, FALSE); TODO */
 279
 280                 /* Disable the VGA plane that we never use */
 281                 REG_WRITE(VGACNTRL, VGA_DISP_DISABLE);
 282
 283                 /* Turn off vblank interrupts */
 284                 drm_vblank_off(dev, pipe);
 285
 286                 /* Wait for vblank for the disable to take effect */
 287                 gma_wait_for_vblank(dev);
 288
 289                 /* Disable plane */
 290                 temp = REG_READ(map->cntr);
 291                 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
 292                         REG_WRITE(map->cntr,
 293                                   temp & ~DISPLAY_PLANE_ENABLE);
 294                         /* Flush the plane changes */
 295                         REG_WRITE(map->base, REG_READ(map->base));
 296                         REG_READ(map->base);
 297                 }
 298
 299                 /* Disable pipe */
 300                 temp = REG_READ(map->conf);
 301                 if ((temp & PIPEACONF_ENABLE) != 0) {
 302                         REG_WRITE(map->conf, temp & ~PIPEACONF_ENABLE);
 303                         REG_READ(map->conf);
 304                 }
 305
 306                 /* Wait for vblank for the disable to take effect. */
 307                 gma_wait_for_vblank(dev);
 308
 309                 udelay(150);
 310
 311                 /* Disable DPLL */
 312                 temp = REG_READ(map->dpll);
 313                 if ((temp & DPLL_VCO_ENABLE) != 0) {
 314                         REG_WRITE(map->dpll, temp & ~DPLL_VCO_ENABLE);
 315                         REG_READ(map->dpll);
 316                 }
 317
 318                 /* Wait for the clocks to turn off. */
 319                 udelay(150);
 320                 break;
 321         }
 322
 323         if (IS_CDV(dev))
 324                 dev_priv->ops->update_wm(dev, crtc);
 325
 326         /* Set FIFO watermarks */
 327         REG_WRITE(DSPARB, 0x3F3E);
 328 }
 329
 330 int gma_crtc_cursor_set(struct drm_crtc *crtc,
 331                         struct drm_file *file_priv,
 332                         uint32_t handle,
 333                         uint32_t width, uint32_t height)
 334 {
 335         struct drm_device *dev = crtc->dev;
 336         struct drm_psb_private *dev_priv = dev->dev_private;
 337         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 338         int pipe = gma_crtc->pipe;
 339         uint32_t control = (pipe == 0) ? CURACNTR : CURBCNTR;
 340         uint32_t base = (pipe == 0) ? CURABASE : CURBBASE;
 341         uint32_t temp;
 342         size_t addr = 0;
 343         struct gtt_range *gt;
 344         struct gtt_range *cursor_gt = gma_crtc->cursor_gt;
 345         struct drm_gem_object *obj;
 346         void *tmp_dst, *tmp_src;
 347         int ret = 0, i, cursor_pages;
 348
 349         /* If we didn't get a handle then turn the cursor off */
 350         if (!handle) {
 351                 temp = CURSOR_MODE_DISABLE;
 352                 mutex_lock(&dev->struct_mutex);
 353
 354                 if (gma_power_begin(dev, false)) {
 355                         REG_WRITE(control, temp);
 356                         REG_WRITE(base, 0);
 357                         gma_power_end(dev);
 358                 }
 359
 360                 /* Unpin the old GEM object */
 361                 if (gma_crtc->cursor_obj) {
 362                         gt = container_of(gma_crtc->cursor_obj,
 363                                           struct gtt_range, gem);
 364                         psb_gtt_unpin(gt);
 365                         drm_gem_object_unreference(gma_crtc->cursor_obj);
 366                         gma_crtc->cursor_obj = NULL;
 367                 }
 368
 369                 mutex_unlock(&dev->struct_mutex);
 370                 return 0;
 371         }
 372
 373         /* Currently we only support 64x64 cursors */
 374         if (width != 64 || height != 64) {
 375                 dev_dbg(dev->dev, "We currently only support 64x64 cursors\n");
 376                 return -EINVAL;
 377         }
 378
 379         mutex_lock(&dev->struct_mutex);
 380         obj = drm_gem_object_lookup(dev, file_priv, handle);
 381         if (!obj) {
 382                 ret = -ENOENT;
 383                 goto unlock;
 384         }
 385
 386         if (obj->size < width * height * 4) {
 387                 dev_dbg(dev->dev, "Buffer is too small\n");
 388                 ret = -ENOMEM;
 389                 goto unref_cursor;
 390         }
 391
 392         gt = container_of(obj, struct gtt_range, gem);
 393
 394         /* Pin the memory into the GTT */
 395         ret = psb_gtt_pin(gt);
 396         if (ret) {
 397                 dev_err(dev->dev, "Can not pin down handle 0x%x\n", handle);
 398                 goto unref_cursor;
 399         }
 400
 401         if (dev_priv->ops->cursor_needs_phys) {
 402                 if (cursor_gt == NULL) {
 403                         dev_err(dev->dev, "No hardware cursor mem available");
 404                         ret = -ENOMEM;
 405                         goto unref_cursor;
 406                 }
 407
 408                 /* Prevent overflow */
 409                 if (gt->npage > 4)
 410                         cursor_pages = 4;
 411                 else
 412                         cursor_pages = gt->npage;
 413
 414                 /* Copy the cursor to cursor mem */
 415                 tmp_dst = dev_priv->vram_addr + cursor_gt->offset;
 416                 for (i = 0; i < cursor_pages; i++) {
 417                         tmp_src = kmap(gt->pages[i]);
 418                         memcpy(tmp_dst, tmp_src, PAGE_SIZE);
 419                         kunmap(gt->pages[i]);
 420                         tmp_dst += PAGE_SIZE;
 421                 }
 422
 423                 addr = gma_crtc->cursor_addr;
 424         } else {
 425                 addr = gt->offset;
 426                 gma_crtc->cursor_addr = addr;
 427         }
 428
 429         temp = 0;
 430         /* set the pipe for the cursor */
 431         temp |= (pipe << 28);
 432         temp |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
 433
 434         if (gma_power_begin(dev, false)) {
 435                 REG_WRITE(control, temp);
 436                 REG_WRITE(base, addr);
 437                 gma_power_end(dev);
 438         }
 439
 440         /* unpin the old bo */
 441         if (gma_crtc->cursor_obj) {
 442                 gt = container_of(gma_crtc->cursor_obj, struct gtt_range, gem);
 443                 psb_gtt_unpin(gt);
 444                 drm_gem_object_unreference(gma_crtc->cursor_obj);
 445         }
 446
 447         gma_crtc->cursor_obj = obj;
 448 unlock:
 449         mutex_unlock(&dev->struct_mutex);
 450         return ret;
 451
 452 unref_cursor:
 453         drm_gem_object_unreference(obj);
 454         mutex_unlock(&dev->struct_mutex);
 455         return ret;
 456 }
 457
 458 int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 459 {
 460         struct drm_device *dev = crtc->dev;
 461         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 462         int pipe = gma_crtc->pipe;
 463         uint32_t temp = 0;
 464         uint32_t addr;
 465
 466         if (x < 0) {
 467                 temp |= (CURSOR_POS_SIGN << CURSOR_X_SHIFT);
 468                 x = -x;
 469         }
 470         if (y < 0) {
 471                 temp |= (CURSOR_POS_SIGN << CURSOR_Y_SHIFT);
 472                 y = -y;
 473         }
 474
 475         temp |= ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT);
 476         temp |= ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
 477
 478         addr = gma_crtc->cursor_addr;
 479
 480         if (gma_power_begin(dev, false)) {
 481                 REG_WRITE((pipe == 0) ? CURAPOS : CURBPOS, temp);
 482                 REG_WRITE((pipe == 0) ? CURABASE : CURBBASE, addr);
 483                 gma_power_end(dev);
 484         }
 485         return 0;
 486 }
 487
 488 bool gma_crtc_mode_fixup(struct drm_crtc *crtc,
 489                          const struct drm_display_mode *mode,
 490                          struct drm_display_mode *adjusted_mode)
 491 {
 492         return true;
 493 }
 494
 495 void gma_crtc_prepare(struct drm_crtc *crtc)
 496 {
 497         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 498         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 499 }
 500
 501 void gma_crtc_commit(struct drm_crtc *crtc)
 502 {
 503         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 504         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 505 }
 506
 507 void gma_crtc_disable(struct drm_crtc *crtc)
 508 {
 509         struct gtt_range *gt;
 510         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 511
 512         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 513
 514         if (crtc->fb) {
 515                 gt = to_psb_fb(crtc->fb)->gtt;
 516                 psb_gtt_unpin(gt);
 517         }
 518 }
 519
 520 void gma_crtc_destroy(struct drm_crtc *crtc)
 521 {
 522         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 523
 524         kfree(gma_crtc->crtc_state);
 525         drm_crtc_cleanup(crtc);
 526         kfree(gma_crtc);
 527 }
 528
 529 int gma_crtc_set_config(struct drm_mode_set *set)
 530 {
 531         struct drm_device *dev = set->crtc->dev;
 532         struct drm_psb_private *dev_priv = dev->dev_private;
 533         int ret;
 534
 535         if (!dev_priv->rpm_enabled)
 536                 return drm_crtc_helper_set_config(set);
 537
 538         pm_runtime_forbid(&dev->pdev->dev);
 539         ret = drm_crtc_helper_set_config(set);
 540         pm_runtime_allow(&dev->pdev->dev);
 541
 542         return ret;
 543 }
 544
 545 /**
 546  * Save HW states of given crtc
 547  */
 548 void gma_crtc_save(struct drm_crtc *crtc)
 549 {
 550         struct drm_device *dev = crtc->dev;
 551         struct drm_psb_private *dev_priv = dev->dev_private;
 552         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 553         struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
 554         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 555         uint32_t palette_reg;
 556         int i;
 557
 558         if (!crtc_state) {
 559                 dev_err(dev->dev, "No CRTC state found\n");
 560                 return;
 561         }
 562
 563         crtc_state->saveDSPCNTR = REG_READ(map->cntr);
 564         crtc_state->savePIPECONF = REG_READ(map->conf);
 565         crtc_state->savePIPESRC = REG_READ(map->src);
 566         crtc_state->saveFP0 = REG_READ(map->fp0);
 567         crtc_state->saveFP1 = REG_READ(map->fp1);
 568         crtc_state->saveDPLL = REG_READ(map->dpll);
 569         crtc_state->saveHTOTAL = REG_READ(map->htotal);
 570         crtc_state->saveHBLANK = REG_READ(map->hblank);
 571         crtc_state->saveHSYNC = REG_READ(map->hsync);
 572         crtc_state->saveVTOTAL = REG_READ(map->vtotal);
 573         crtc_state->saveVBLANK = REG_READ(map->vblank);
 574         crtc_state->saveVSYNC = REG_READ(map->vsync);
 575         crtc_state->saveDSPSTRIDE = REG_READ(map->stride);
 576
 577         /* NOTE: DSPSIZE DSPPOS only for psb */
 578         crtc_state->saveDSPSIZE = REG_READ(map->size);
 579         crtc_state->saveDSPPOS = REG_READ(map->pos);
 580
 581         crtc_state->saveDSPBASE = REG_READ(map->base);
 582
 583         palette_reg = map->palette;
 584         for (i = 0; i < 256; ++i)
 585                 crtc_state->savePalette[i] = REG_READ(palette_reg + (i << 2));
 586 }
 587
 588 /**
 589  * Restore HW states of given crtc
 590  */
 591 void gma_crtc_restore(struct drm_crtc *crtc)
 592 {
 593         struct drm_device *dev = crtc->dev;
 594         struct drm_psb_private *dev_priv = dev->dev_private;
 595         struct gma_crtc *gma_crtc =  to_gma_crtc(crtc);
 596         struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
 597         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 598         uint32_t palette_reg;
 599         int i;
 600
 601         if (!crtc_state) {
 602                 dev_err(dev->dev, "No crtc state\n");
 603                 return;
 604         }
 605
 606         if (crtc_state->saveDPLL & DPLL_VCO_ENABLE) {
 607                 REG_WRITE(map->dpll,
 608                         crtc_state->saveDPLL & ~DPLL_VCO_ENABLE);
 609                 REG_READ(map->dpll);
 610                 udelay(150);
 611         }
 612
 613         REG_WRITE(map->fp0, crtc_state->saveFP0);
 614         REG_READ(map->fp0);
 615
 616         REG_WRITE(map->fp1, crtc_state->saveFP1);
 617         REG_READ(map->fp1);
 618
 619         REG_WRITE(map->dpll, crtc_state->saveDPLL);
 620         REG_READ(map->dpll);
 621         udelay(150);
 622
 623         REG_WRITE(map->htotal, crtc_state->saveHTOTAL);
 624         REG_WRITE(map->hblank, crtc_state->saveHBLANK);
 625         REG_WRITE(map->hsync, crtc_state->saveHSYNC);
 626         REG_WRITE(map->vtotal, crtc_state->saveVTOTAL);
 627         REG_WRITE(map->vblank, crtc_state->saveVBLANK);
 628         REG_WRITE(map->vsync, crtc_state->saveVSYNC);
 629         REG_WRITE(map->stride, crtc_state->saveDSPSTRIDE);
 630
 631         REG_WRITE(map->size, crtc_state->saveDSPSIZE);
 632         REG_WRITE(map->pos, crtc_state->saveDSPPOS);
 633
 634         REG_WRITE(map->src, crtc_state->savePIPESRC);
 635         REG_WRITE(map->base, crtc_state->saveDSPBASE);
 636         REG_WRITE(map->conf, crtc_state->savePIPECONF);
 637
 638         gma_wait_for_vblank(dev);
 639
 640         REG_WRITE(map->cntr, crtc_state->saveDSPCNTR);
 641         REG_WRITE(map->base, crtc_state->saveDSPBASE);
 642
 643         gma_wait_for_vblank(dev);
 644
 645         palette_reg = map->palette;
 646         for (i = 0; i < 256; ++i)
 647                 REG_WRITE(palette_reg + (i << 2), crtc_state->savePalette[i]);
 648 }
 649
 650 void gma_encoder_prepare(struct drm_encoder *encoder)
 651 {
 652         struct drm_encoder_helper_funcs *encoder_funcs =
 653             encoder->helper_private;
 654         /* lvds has its own version of prepare see psb_intel_lvds_prepare */
 655         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
 656 }
 657
 658 void gma_encoder_commit(struct drm_encoder *encoder)
 659 {
 660         struct drm_encoder_helper_funcs *encoder_funcs =
 661             encoder->helper_private;
 662         /* lvds has its own version of commit see psb_intel_lvds_commit */
 663         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 664 }
 665
 666 void gma_encoder_destroy(struct drm_encoder *encoder)
 667 {
 668         struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
 669
 670         drm_encoder_cleanup(encoder);
 671         kfree(intel_encoder);
 672 }
 673
 674 /* Currently there is only a 1:1 mapping of encoders and connectors */
 675 struct drm_encoder *gma_best_encoder(struct drm_connector *connector)
 676 {
 677         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 678
 679         return &gma_encoder->base;
 680 }
 681
 682 void gma_connector_attach_encoder(struct gma_connector *connector,
 683                                   struct gma_encoder *encoder)
 684 {
 685         connector->encoder = encoder;
 686         drm_mode_connector_attach_encoder(&connector->base,
 687                                           &encoder->base);
 688 }
 689
 690 #define GMA_PLL_INVALID(s) { /* DRM_ERROR(s); */ return false; }
 691
 692 bool gma_pll_is_valid(struct drm_crtc *crtc,
 693                       const struct gma_limit_t *limit,
 694                       struct gma_clock_t *clock)
 695 {
 696         if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
 697                 GMA_PLL_INVALID("p1 out of range");
 698         if (clock->p < limit->p.min || limit->p.max < clock->p)
 699                 GMA_PLL_INVALID("p out of range");
 700         if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
 701                 GMA_PLL_INVALID("m2 out of range");
 702         if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
 703                 GMA_PLL_INVALID("m1 out of range");
 704         /* On CDV m1 is always 0 */
 705         if (clock->m1 <= clock->m2 && clock->m1 != 0)
 706                 GMA_PLL_INVALID("m1 <= m2 && m1 != 0");
 707         if (clock->m < limit->m.min || limit->m.max < clock->m)
 708                 GMA_PLL_INVALID("m out of range");
 709         if (clock->n < limit->n.min || limit->n.max < clock->n)
 710                 GMA_PLL_INVALID("n out of range");
 711         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 712                 GMA_PLL_INVALID("vco out of range");
 713         /* XXX: We may need to be checking "Dot clock"
 714          * depending on the multiplier, connector, etc.,
 715          * rather than just a single range.
 716          */
 717         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 718                 GMA_PLL_INVALID("dot out of range");
 719
 720         return true;
 721 }
 722
 723 bool gma_find_best_pll(const struct gma_limit_t *limit,
 724                        struct drm_crtc *crtc, int target, int refclk,
 725                        struct gma_clock_t *best_clock)
 726 {
 727         struct drm_device *dev = crtc->dev;
 728         const struct gma_clock_funcs *clock_funcs =
 729                                                 to_gma_crtc(crtc)->clock_funcs;
 730         struct gma_clock_t clock;
 731         int err = target;
 732
 733         if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
 734             (REG_READ(LVDS) & LVDS_PORT_EN) != 0) {
 735                 /*
 736                  * For LVDS, if the panel is on, just rely on its current
 737                  * settings for dual-channel.  We haven't figured out how to
 738                  * reliably set up different single/dual channel state, if we
 739                  * even can.
 740                  */
 741                 if ((REG_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
 742                     LVDS_CLKB_POWER_UP)
 743                         clock.p2 = limit->p2.p2_fast;
 744                 else
 745                         clock.p2 = limit->p2.p2_slow;
 746         } else {
 747                 if (target < limit->p2.dot_limit)
 748                         clock.p2 = limit->p2.p2_slow;
 749                 else
 750                         clock.p2 = limit->p2.p2_fast;
 751         }
 752
 753         memset(best_clock, 0, sizeof(*best_clock));
 754
 755         /* m1 is always 0 on CDV so the outmost loop will run just once */
 756         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
 757                 for (clock.m2 = limit->m2.min;
 758                      (clock.m2 < clock.m1 || clock.m1 == 0) &&
 759                       clock.m2 <= limit->m2.max; clock.m2++) {
 760                         for (clock.n = limit->n.min;
 761                              clock.n <= limit->n.max; clock.n++) {
 762                                 for (clock.p1 = limit->p1.min;
 763                                      clock.p1 <= limit->p1.max;
 764                                      clock.p1++) {
 765                                         int this_err;
 766
 767                                         clock_funcs->clock(refclk, &clock);
 768
 769                                         if (!clock_funcs->pll_is_valid(crtc,
 770                                                                 limit, &clock))
 771                                                 continue;
 772
 773                                         this_err = abs(clock.dot - target);
 774                                         if (this_err < err) {
 775                                                 *best_clock = clock;
 776                                                 err = this_err;
 777                                         }
 778                                 }
 779                         }
 780                 }
 781         }
 782
 783         return err != target;
 784 }