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