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