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->primary->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->primary->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->primary->fb->pitches[0] + x * (crtc->primary->fb->bits_per_pixel / 8);
  85
  86         REG_WRITE(map->stride, crtc->primary->fb->pitches[0]);
  87
  88         dspcntr = REG_READ(map->cntr);
  89         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
  90
  91         switch (crtc->primary->fb->bits_per_pixel) {
  92         case 8:
  93                 dspcntr |= DISPPLANE_8BPP;
  94                 break;
  95         case 16:
  96                 if (crtc->primary->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                 if (gma_power_begin(dev, false)) {
 353                         REG_WRITE(control, temp);
 354                         REG_WRITE(base, 0);
 355                         gma_power_end(dev);
 356                 }
 357
 358                 /* Unpin the old GEM object */
 359                 if (gma_crtc->cursor_obj) {
 360                         gt = container_of(gma_crtc->cursor_obj,
 361                                           struct gtt_range, gem);
 362                         psb_gtt_unpin(gt);
 363                         drm_gem_object_unreference_unlocked(gma_crtc->cursor_obj);
 364                         gma_crtc->cursor_obj = NULL;
 365                 }
 366                 return 0;
 367         }
 368
 369         /* Currently we only support 64x64 cursors */
 370         if (width != 64 || height != 64) {
 371                 dev_dbg(dev->dev, "We currently only support 64x64 cursors\n");
 372                 return -EINVAL;
 373         }
 374
 375         obj = drm_gem_object_lookup(file_priv, handle);
 376         if (!obj) {
 377                 ret = -ENOENT;
 378                 goto unlock;
 379         }
 380
 381         if (obj->size < width * height * 4) {
 382                 dev_dbg(dev->dev, "Buffer is too small\n");
 383                 ret = -ENOMEM;
 384                 goto unref_cursor;
 385         }
 386
 387         gt = container_of(obj, struct gtt_range, gem);
 388
 389         /* Pin the memory into the GTT */
 390         ret = psb_gtt_pin(gt);
 391         if (ret) {
 392                 dev_err(dev->dev, "Can not pin down handle 0x%x\n", handle);
 393                 goto unref_cursor;
 394         }
 395
 396         if (dev_priv->ops->cursor_needs_phys) {
 397                 if (cursor_gt == NULL) {
 398                         dev_err(dev->dev, "No hardware cursor mem available");
 399                         ret = -ENOMEM;
 400                         goto unref_cursor;
 401                 }
 402
 403                 /* Prevent overflow */
 404                 if (gt->npage > 4)
 405                         cursor_pages = 4;
 406                 else
 407                         cursor_pages = gt->npage;
 408
 409                 /* Copy the cursor to cursor mem */
 410                 tmp_dst = dev_priv->vram_addr + cursor_gt->offset;
 411                 for (i = 0; i < cursor_pages; i++) {
 412                         tmp_src = kmap(gt->pages[i]);
 413                         memcpy(tmp_dst, tmp_src, PAGE_SIZE);
 414                         kunmap(gt->pages[i]);
 415                         tmp_dst += PAGE_SIZE;
 416                 }
 417
 418                 addr = gma_crtc->cursor_addr;
 419         } else {
 420                 addr = gt->offset;
 421                 gma_crtc->cursor_addr = addr;
 422         }
 423
 424         temp = 0;
 425         /* set the pipe for the cursor */
 426         temp |= (pipe << 28);
 427         temp |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
 428
 429         if (gma_power_begin(dev, false)) {
 430                 REG_WRITE(control, temp);
 431                 REG_WRITE(base, addr);
 432                 gma_power_end(dev);
 433         }
 434
 435         /* unpin the old bo */
 436         if (gma_crtc->cursor_obj) {
 437                 gt = container_of(gma_crtc->cursor_obj, struct gtt_range, gem);
 438                 psb_gtt_unpin(gt);
 439                 drm_gem_object_unreference_unlocked(gma_crtc->cursor_obj);
 440         }
 441
 442         gma_crtc->cursor_obj = obj;
 443 unlock:
 444         return ret;
 445
 446 unref_cursor:
 447         drm_gem_object_unreference_unlocked(obj);
 448         return ret;
 449 }
 450
 451 int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 452 {
 453         struct drm_device *dev = crtc->dev;
 454         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 455         int pipe = gma_crtc->pipe;
 456         uint32_t temp = 0;
 457         uint32_t addr;
 458
 459         if (x < 0) {
 460                 temp |= (CURSOR_POS_SIGN << CURSOR_X_SHIFT);
 461                 x = -x;
 462         }
 463         if (y < 0) {
 464                 temp |= (CURSOR_POS_SIGN << CURSOR_Y_SHIFT);
 465                 y = -y;
 466         }
 467
 468         temp |= ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT);
 469         temp |= ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
 470
 471         addr = gma_crtc->cursor_addr;
 472
 473         if (gma_power_begin(dev, false)) {
 474                 REG_WRITE((pipe == 0) ? CURAPOS : CURBPOS, temp);
 475                 REG_WRITE((pipe == 0) ? CURABASE : CURBBASE, addr);
 476                 gma_power_end(dev);
 477         }
 478         return 0;
 479 }
 480
 481 void gma_crtc_prepare(struct drm_crtc *crtc)
 482 {
 483         const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 484         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 485 }
 486
 487 void gma_crtc_commit(struct drm_crtc *crtc)
 488 {
 489         const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 490         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 491 }
 492
 493 void gma_crtc_disable(struct drm_crtc *crtc)
 494 {
 495         struct gtt_range *gt;
 496         const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 497
 498         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 499
 500         if (crtc->primary->fb) {
 501                 gt = to_psb_fb(crtc->primary->fb)->gtt;
 502                 psb_gtt_unpin(gt);
 503         }
 504 }
 505
 506 void gma_crtc_destroy(struct drm_crtc *crtc)
 507 {
 508         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 509
 510         kfree(gma_crtc->crtc_state);
 511         drm_crtc_cleanup(crtc);
 512         kfree(gma_crtc);
 513 }
 514
 515 int gma_crtc_set_config(struct drm_mode_set *set)
 516 {
 517         struct drm_device *dev = set->crtc->dev;
 518         struct drm_psb_private *dev_priv = dev->dev_private;
 519         int ret;
 520
 521         if (!dev_priv->rpm_enabled)
 522                 return drm_crtc_helper_set_config(set);
 523
 524         pm_runtime_forbid(&dev->pdev->dev);
 525         ret = drm_crtc_helper_set_config(set);
 526         pm_runtime_allow(&dev->pdev->dev);
 527
 528         return ret;
 529 }
 530
 531 /**
 532  * Save HW states of given crtc
 533  */
 534 void gma_crtc_save(struct drm_crtc *crtc)
 535 {
 536         struct drm_device *dev = crtc->dev;
 537         struct drm_psb_private *dev_priv = dev->dev_private;
 538         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 539         struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
 540         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 541         uint32_t palette_reg;
 542         int i;
 543
 544         if (!crtc_state) {
 545                 dev_err(dev->dev, "No CRTC state found\n");
 546                 return;
 547         }
 548
 549         crtc_state->saveDSPCNTR = REG_READ(map->cntr);
 550         crtc_state->savePIPECONF = REG_READ(map->conf);
 551         crtc_state->savePIPESRC = REG_READ(map->src);
 552         crtc_state->saveFP0 = REG_READ(map->fp0);
 553         crtc_state->saveFP1 = REG_READ(map->fp1);
 554         crtc_state->saveDPLL = REG_READ(map->dpll);
 555         crtc_state->saveHTOTAL = REG_READ(map->htotal);
 556         crtc_state->saveHBLANK = REG_READ(map->hblank);
 557         crtc_state->saveHSYNC = REG_READ(map->hsync);
 558         crtc_state->saveVTOTAL = REG_READ(map->vtotal);
 559         crtc_state->saveVBLANK = REG_READ(map->vblank);
 560         crtc_state->saveVSYNC = REG_READ(map->vsync);
 561         crtc_state->saveDSPSTRIDE = REG_READ(map->stride);
 562
 563         /* NOTE: DSPSIZE DSPPOS only for psb */
 564         crtc_state->saveDSPSIZE = REG_READ(map->size);
 565         crtc_state->saveDSPPOS = REG_READ(map->pos);
 566
 567         crtc_state->saveDSPBASE = REG_READ(map->base);
 568
 569         palette_reg = map->palette;
 570         for (i = 0; i < 256; ++i)
 571                 crtc_state->savePalette[i] = REG_READ(palette_reg + (i << 2));
 572 }
 573
 574 /**
 575  * Restore HW states of given crtc
 576  */
 577 void gma_crtc_restore(struct drm_crtc *crtc)
 578 {
 579         struct drm_device *dev = crtc->dev;
 580         struct drm_psb_private *dev_priv = dev->dev_private;
 581         struct gma_crtc *gma_crtc =  to_gma_crtc(crtc);
 582         struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
 583         const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
 584         uint32_t palette_reg;
 585         int i;
 586
 587         if (!crtc_state) {
 588                 dev_err(dev->dev, "No crtc state\n");
 589                 return;
 590         }
 591
 592         if (crtc_state->saveDPLL & DPLL_VCO_ENABLE) {
 593                 REG_WRITE(map->dpll,
 594                         crtc_state->saveDPLL & ~DPLL_VCO_ENABLE);
 595                 REG_READ(map->dpll);
 596                 udelay(150);
 597         }
 598
 599         REG_WRITE(map->fp0, crtc_state->saveFP0);
 600         REG_READ(map->fp0);
 601
 602         REG_WRITE(map->fp1, crtc_state->saveFP1);
 603         REG_READ(map->fp1);
 604
 605         REG_WRITE(map->dpll, crtc_state->saveDPLL);
 606         REG_READ(map->dpll);
 607         udelay(150);
 608
 609         REG_WRITE(map->htotal, crtc_state->saveHTOTAL);
 610         REG_WRITE(map->hblank, crtc_state->saveHBLANK);
 611         REG_WRITE(map->hsync, crtc_state->saveHSYNC);
 612         REG_WRITE(map->vtotal, crtc_state->saveVTOTAL);
 613         REG_WRITE(map->vblank, crtc_state->saveVBLANK);
 614         REG_WRITE(map->vsync, crtc_state->saveVSYNC);
 615         REG_WRITE(map->stride, crtc_state->saveDSPSTRIDE);
 616
 617         REG_WRITE(map->size, crtc_state->saveDSPSIZE);
 618         REG_WRITE(map->pos, crtc_state->saveDSPPOS);
 619
 620         REG_WRITE(map->src, crtc_state->savePIPESRC);
 621         REG_WRITE(map->base, crtc_state->saveDSPBASE);
 622         REG_WRITE(map->conf, crtc_state->savePIPECONF);
 623
 624         gma_wait_for_vblank(dev);
 625
 626         REG_WRITE(map->cntr, crtc_state->saveDSPCNTR);
 627         REG_WRITE(map->base, crtc_state->saveDSPBASE);
 628
 629         gma_wait_for_vblank(dev);
 630
 631         palette_reg = map->palette;
 632         for (i = 0; i < 256; ++i)
 633                 REG_WRITE(palette_reg + (i << 2), crtc_state->savePalette[i]);
 634 }
 635
 636 void gma_encoder_prepare(struct drm_encoder *encoder)
 637 {
 638         const struct drm_encoder_helper_funcs *encoder_funcs =
 639             encoder->helper_private;
 640         /* lvds has its own version of prepare see psb_intel_lvds_prepare */
 641         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
 642 }
 643
 644 void gma_encoder_commit(struct drm_encoder *encoder)
 645 {
 646         const struct drm_encoder_helper_funcs *encoder_funcs =
 647             encoder->helper_private;
 648         /* lvds has its own version of commit see psb_intel_lvds_commit */
 649         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 650 }
 651
 652 void gma_encoder_destroy(struct drm_encoder *encoder)
 653 {
 654         struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
 655
 656         drm_encoder_cleanup(encoder);
 657         kfree(intel_encoder);
 658 }
 659
 660 /* Currently there is only a 1:1 mapping of encoders and connectors */
 661 struct drm_encoder *gma_best_encoder(struct drm_connector *connector)
 662 {
 663         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 664
 665         return &gma_encoder->base;
 666 }
 667
 668 void gma_connector_attach_encoder(struct gma_connector *connector,
 669                                   struct gma_encoder *encoder)
 670 {
 671         connector->encoder = encoder;
 672         drm_mode_connector_attach_encoder(&connector->base,
 673                                           &encoder->base);
 674 }
 675
 676 #define GMA_PLL_INVALID(s) { /* DRM_ERROR(s); */ return false; }
 677
 678 bool gma_pll_is_valid(struct drm_crtc *crtc,
 679                       const struct gma_limit_t *limit,
 680                       struct gma_clock_t *clock)
 681 {
 682         if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
 683                 GMA_PLL_INVALID("p1 out of range");
 684         if (clock->p < limit->p.min || limit->p.max < clock->p)
 685                 GMA_PLL_INVALID("p out of range");
 686         if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
 687                 GMA_PLL_INVALID("m2 out of range");
 688         if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
 689                 GMA_PLL_INVALID("m1 out of range");
 690         /* On CDV m1 is always 0 */
 691         if (clock->m1 <= clock->m2 && clock->m1 != 0)
 692                 GMA_PLL_INVALID("m1 <= m2 && m1 != 0");
 693         if (clock->m < limit->m.min || limit->m.max < clock->m)
 694                 GMA_PLL_INVALID("m out of range");
 695         if (clock->n < limit->n.min || limit->n.max < clock->n)
 696                 GMA_PLL_INVALID("n out of range");
 697         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 698                 GMA_PLL_INVALID("vco out of range");
 699         /* XXX: We may need to be checking "Dot clock"
 700          * depending on the multiplier, connector, etc.,
 701          * rather than just a single range.
 702          */
 703         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 704                 GMA_PLL_INVALID("dot out of range");
 705
 706         return true;
 707 }
 708
 709 bool gma_find_best_pll(const struct gma_limit_t *limit,
 710                        struct drm_crtc *crtc, int target, int refclk,
 711                        struct gma_clock_t *best_clock)
 712 {
 713         struct drm_device *dev = crtc->dev;
 714         const struct gma_clock_funcs *clock_funcs =
 715                                                 to_gma_crtc(crtc)->clock_funcs;
 716         struct gma_clock_t clock;
 717         int err = target;
 718
 719         if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
 720             (REG_READ(LVDS) & LVDS_PORT_EN) != 0) {
 721                 /*
 722                  * For LVDS, if the panel is on, just rely on its current
 723                  * settings for dual-channel.  We haven't figured out how to
 724                  * reliably set up different single/dual channel state, if we
 725                  * even can.
 726                  */
 727                 if ((REG_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
 728                     LVDS_CLKB_POWER_UP)
 729                         clock.p2 = limit->p2.p2_fast;
 730                 else
 731                         clock.p2 = limit->p2.p2_slow;
 732         } else {
 733                 if (target < limit->p2.dot_limit)
 734                         clock.p2 = limit->p2.p2_slow;
 735                 else
 736                         clock.p2 = limit->p2.p2_fast;
 737         }
 738
 739         memset(best_clock, 0, sizeof(*best_clock));
 740
 741         /* m1 is always 0 on CDV so the outmost loop will run just once */
 742         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
 743                 for (clock.m2 = limit->m2.min;
 744                      (clock.m2 < clock.m1 || clock.m1 == 0) &&
 745                       clock.m2 <= limit->m2.max; clock.m2++) {
 746                         for (clock.n = limit->n.min;
 747                              clock.n <= limit->n.max; clock.n++) {
 748                                 for (clock.p1 = limit->p1.min;
 749                                      clock.p1 <= limit->p1.max;
 750                                      clock.p1++) {
 751                                         int this_err;
 752
 753                                         clock_funcs->clock(refclk, &clock);
 754
 755                                         if (!clock_funcs->pll_is_valid(crtc,
 756                                                                 limit, &clock))
 757                                                 continue;
 758
 759                                         this_err = abs(clock.dot - target);
 760                                         if (this_err < err) {
 761                                                 *best_clock = clock;
 762                                                 err = this_err;
 763                                         }
 764                                 }
 765                         }
 766                 }
 767         }
 768
 769         return err != target;
 770 }