drivers/gpu/drm/gma500/oaktrail_crtc.c

   1 /*
   2  * Copyright © 2009 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
  18 #include <linux/i2c.h>
  19 #include <linux/pm_runtime.h>
  20
  21 #include <drm/drmP.h>
  22 #include "framebuffer.h"
  23 #include "psb_drv.h"
  24 #include "psb_intel_drv.h"
  25 #include "psb_intel_reg.h"
  26 #include "gma_display.h"
  27 #include "power.h"
  28
  29 #define MRST_LIMIT_LVDS_100L    0
  30 #define MRST_LIMIT_LVDS_83      1
  31 #define MRST_LIMIT_LVDS_100     2
  32 #define MRST_LIMIT_SDVO         3
  33
  34 #define MRST_DOT_MIN              19750
  35 #define MRST_DOT_MAX              120000
  36 #define MRST_M_MIN_100L             20
  37 #define MRST_M_MIN_100              10
  38 #define MRST_M_MIN_83               12
  39 #define MRST_M_MAX_100L             34
  40 #define MRST_M_MAX_100              17
  41 #define MRST_M_MAX_83               20
  42 #define MRST_P1_MIN                 2
  43 #define MRST_P1_MAX_0               7
  44 #define MRST_P1_MAX_1               8
  45
  46 static bool mrst_lvds_find_best_pll(const struct gma_limit_t *limit,
  47                                     struct drm_crtc *crtc, int target,
  48                                     int refclk, struct gma_clock_t *best_clock);
  49
  50 static bool mrst_sdvo_find_best_pll(const struct gma_limit_t *limit,
  51                                     struct drm_crtc *crtc, int target,
  52                                     int refclk, struct gma_clock_t *best_clock);
  53
  54 static const struct gma_limit_t mrst_limits[] = {
  55         {                       /* MRST_LIMIT_LVDS_100L */
  56          .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
  57          .m = {.min = MRST_M_MIN_100L, .max = MRST_M_MAX_100L},
  58          .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
  59          .find_pll = mrst_lvds_find_best_pll,
  60          },
  61         {                       /* MRST_LIMIT_LVDS_83L */
  62          .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
  63          .m = {.min = MRST_M_MIN_83, .max = MRST_M_MAX_83},
  64          .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_0},
  65          .find_pll = mrst_lvds_find_best_pll,
  66          },
  67         {                       /* MRST_LIMIT_LVDS_100 */
  68          .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
  69          .m = {.min = MRST_M_MIN_100, .max = MRST_M_MAX_100},
  70          .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
  71          .find_pll = mrst_lvds_find_best_pll,
  72          },
  73         {                       /* MRST_LIMIT_SDVO */
  74          .vco = {.min = 1400000, .max = 2800000},
  75          .n = {.min = 3, .max = 7},
  76          .m = {.min = 80, .max = 137},
  77          .p1 = {.min = 1, .max = 2},
  78          .p2 = {.dot_limit = 200000, .p2_slow = 10, .p2_fast = 10},
  79          .find_pll = mrst_sdvo_find_best_pll,
  80          },
  81 };
  82
  83 #define MRST_M_MIN          10
  84 static const u32 oaktrail_m_converts[] = {
  85         0x2B, 0x15, 0x2A, 0x35, 0x1A, 0x0D, 0x26, 0x33, 0x19, 0x2C,
  86         0x36, 0x3B, 0x1D, 0x2E, 0x37, 0x1B, 0x2D, 0x16, 0x0B, 0x25,
  87         0x12, 0x09, 0x24, 0x32, 0x39, 0x1c,
  88 };
  89
  90 static const struct gma_limit_t *mrst_limit(struct drm_crtc *crtc,
  91                                             int refclk)
  92 {
  93         const struct gma_limit_t *limit = NULL;
  94         struct drm_device *dev = crtc->dev;
  95         struct drm_psb_private *dev_priv = dev->dev_private;
  96
  97         if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)
  98             || gma_pipe_has_type(crtc, INTEL_OUTPUT_MIPI)) {
  99                 switch (dev_priv->core_freq) {
 100                 case 100:
 101                         limit = &mrst_limits[MRST_LIMIT_LVDS_100L];
 102                         break;
 103                 case 166:
 104                         limit = &mrst_limits[MRST_LIMIT_LVDS_83];
 105                         break;
 106                 case 200:
 107                         limit = &mrst_limits[MRST_LIMIT_LVDS_100];
 108                         break;
 109                 }
 110         } else if (gma_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
 111                 limit = &mrst_limits[MRST_LIMIT_SDVO];
 112         } else {
 113                 limit = NULL;
 114                 dev_err(dev->dev, "mrst_limit Wrong display type.\n");
 115         }
 116
 117         return limit;
 118 }
 119
 120 /** Derive the pixel clock for the given refclk and divisors for 8xx chips. */
 121 static void mrst_lvds_clock(int refclk, struct gma_clock_t *clock)
 122 {
 123         clock->dot = (refclk * clock->m) / (14 * clock->p1);
 124 }
 125
 126 static void mrst_print_pll(struct gma_clock_t *clock)
 127 {
 128         DRM_DEBUG_DRIVER("dotclock=%d,  m=%d, m1=%d, m2=%d, n=%d, p1=%d, p2=%d\n",
 129                          clock->dot, clock->m, clock->m1, clock->m2, clock->n,
 130                          clock->p1, clock->p2);
 131 }
 132
 133 static bool mrst_sdvo_find_best_pll(const struct gma_limit_t *limit,
 134                                     struct drm_crtc *crtc, int target,
 135                                     int refclk, struct gma_clock_t *best_clock)
 136 {
 137         struct gma_clock_t clock;
 138         u32 target_vco, actual_freq;
 139         s32 freq_error, min_error = 100000;
 140
 141         memset(best_clock, 0, sizeof(*best_clock));
 142
 143         for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
 144                 for (clock.n = limit->n.min; clock.n <= limit->n.max;
 145                      clock.n++) {
 146                         for (clock.p1 = limit->p1.min;
 147                              clock.p1 <= limit->p1.max; clock.p1++) {
 148                                 /* p2 value always stored in p2_slow on SDVO */
 149                                 clock.p = clock.p1 * limit->p2.p2_slow;
 150                                 target_vco = target * clock.p;
 151
 152                                 /* VCO will increase at this point so break */
 153                                 if (target_vco > limit->vco.max)
 154                                         break;
 155
 156                                 if (target_vco < limit->vco.min)
 157                                         continue;
 158
 159                                 actual_freq = (refclk * clock.m) /
 160                                               (clock.n * clock.p);
 161                                 freq_error = 10000 -
 162                                              ((target * 10000) / actual_freq);
 163
 164                                 if (freq_error < -min_error) {
 165                                         /* freq_error will start to decrease at
 166                                            this point so break */
 167                                         break;
 168                                 }
 169
 170                                 if (freq_error < 0)
 171                                         freq_error = -freq_error;
 172
 173                                 if (freq_error < min_error) {
 174                                         min_error = freq_error;
 175                                         *best_clock = clock;
 176                                 }
 177                         }
 178                 }
 179                 if (min_error == 0)
 180                         break;
 181         }
 182
 183         return min_error == 0;
 184 }
 185
 186 /**
 187  * Returns a set of divisors for the desired target clock with the given refclk,
 188  * or FALSE.  Divisor values are the actual divisors for
 189  */
 190 static bool mrst_lvds_find_best_pll(const struct gma_limit_t *limit,
 191                                     struct drm_crtc *crtc, int target,
 192                                     int refclk, struct gma_clock_t *best_clock)
 193 {
 194         struct gma_clock_t clock;
 195         int err = target;
 196
 197         memset(best_clock, 0, sizeof(*best_clock));
 198
 199         for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
 200                 for (clock.p1 = limit->p1.min; clock.p1 <= limit->p1.max;
 201                      clock.p1++) {
 202                         int this_err;
 203
 204                         mrst_lvds_clock(refclk, &clock);
 205
 206                         this_err = abs(clock.dot - target);
 207                         if (this_err < err) {
 208                                 *best_clock = clock;
 209                                 err = this_err;
 210                         }
 211                 }
 212         }
 213         return err != target;
 214 }
 215
 216 /**
 217  * Sets the power management mode of the pipe and plane.
 218  *
 219  * This code should probably grow support for turning the cursor off and back
 220  * on appropriately at the same time as we're turning the pipe off/on.
 221  */
 222 static void oaktrail_crtc_dpms(struct drm_crtc *crtc, int mode)
 223 {
 224         struct drm_device *dev = crtc->dev;
 225         struct drm_psb_private *dev_priv = dev->dev_private;
 226         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 227         int pipe = gma_crtc->pipe;
 228         const struct psb_offset *map = &dev_priv->regmap[pipe];
 229         u32 temp;
 230         int i;
 231         int need_aux = gma_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ? 1 : 0;
 232
 233         if (gma_pipe_has_type(crtc, INTEL_OUTPUT_HDMI)) {
 234                 oaktrail_crtc_hdmi_dpms(crtc, mode);
 235                 return;
 236         }
 237
 238         if (!gma_power_begin(dev, true))
 239                 return;
 240
 241         /* XXX: When our outputs are all unaware of DPMS modes other than off
 242          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
 243          */
 244         switch (mode) {
 245         case DRM_MODE_DPMS_ON:
 246         case DRM_MODE_DPMS_STANDBY:
 247         case DRM_MODE_DPMS_SUSPEND:
 248                 for (i = 0; i <= need_aux; i++) {
 249                         /* Enable the DPLL */
 250                         temp = REG_READ_WITH_AUX(map->dpll, i);
 251                         if ((temp & DPLL_VCO_ENABLE) == 0) {
 252                                 REG_WRITE_WITH_AUX(map->dpll, temp, i);
 253                                 REG_READ_WITH_AUX(map->dpll, i);
 254                                 /* Wait for the clocks to stabilize. */
 255                                 udelay(150);
 256                                 REG_WRITE_WITH_AUX(map->dpll,
 257                                                    temp | DPLL_VCO_ENABLE, i);
 258                                 REG_READ_WITH_AUX(map->dpll, i);
 259                                 /* Wait for the clocks to stabilize. */
 260                                 udelay(150);
 261                                 REG_WRITE_WITH_AUX(map->dpll,
 262                                                    temp | DPLL_VCO_ENABLE, i);
 263                                 REG_READ_WITH_AUX(map->dpll, i);
 264                                 /* Wait for the clocks to stabilize. */
 265                                 udelay(150);
 266                         }
 267
 268                         /* Enable the pipe */
 269                         temp = REG_READ_WITH_AUX(map->conf, i);
 270                         if ((temp & PIPEACONF_ENABLE) == 0) {
 271                                 REG_WRITE_WITH_AUX(map->conf,
 272                                                    temp | PIPEACONF_ENABLE, i);
 273                         }
 274
 275                         /* Enable the plane */
 276                         temp = REG_READ_WITH_AUX(map->cntr, i);
 277                         if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
 278                                 REG_WRITE_WITH_AUX(map->cntr,
 279                                                    temp | DISPLAY_PLANE_ENABLE,
 280                                                    i);
 281                                 /* Flush the plane changes */
 282                                 REG_WRITE_WITH_AUX(map->base,
 283                                         REG_READ_WITH_AUX(map->base, i), i);
 284                         }
 285
 286                 }
 287                 gma_crtc_load_lut(crtc);
 288
 289                 /* Give the overlay scaler a chance to enable
 290                    if it's on this pipe */
 291                 /* psb_intel_crtc_dpms_video(crtc, true); TODO */
 292                 break;
 293         case DRM_MODE_DPMS_OFF:
 294                 /* Give the overlay scaler a chance to disable
 295                  * if it's on this pipe */
 296                 /* psb_intel_crtc_dpms_video(crtc, FALSE); TODO */
 297
 298                 for (i = 0; i <= need_aux; i++) {
 299                         /* Disable the VGA plane that we never use */
 300                         REG_WRITE_WITH_AUX(VGACNTRL, VGA_DISP_DISABLE, i);
 301                         /* Disable display plane */
 302                         temp = REG_READ_WITH_AUX(map->cntr, i);
 303                         if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
 304                                 REG_WRITE_WITH_AUX(map->cntr,
 305                                         temp & ~DISPLAY_PLANE_ENABLE, i);
 306                                 /* Flush the plane changes */
 307                                 REG_WRITE_WITH_AUX(map->base,
 308                                                    REG_READ(map->base), i);
 309                                 REG_READ_WITH_AUX(map->base, i);
 310                         }
 311
 312                         /* Next, disable display pipes */
 313                         temp = REG_READ_WITH_AUX(map->conf, i);
 314                         if ((temp & PIPEACONF_ENABLE) != 0) {
 315                                 REG_WRITE_WITH_AUX(map->conf,
 316                                                    temp & ~PIPEACONF_ENABLE, i);
 317                                 REG_READ_WITH_AUX(map->conf, i);
 318                         }
 319                         /* Wait for for the pipe disable to take effect. */
 320                         gma_wait_for_vblank(dev);
 321
 322                         temp = REG_READ_WITH_AUX(map->dpll, i);
 323                         if ((temp & DPLL_VCO_ENABLE) != 0) {
 324                                 REG_WRITE_WITH_AUX(map->dpll,
 325                                                    temp & ~DPLL_VCO_ENABLE, i);
 326                                 REG_READ_WITH_AUX(map->dpll, i);
 327                         }
 328
 329                         /* Wait for the clocks to turn off. */
 330                         udelay(150);
 331                 }
 332                 break;
 333         }
 334
 335         /* Set FIFO Watermarks (values taken from EMGD) */
 336         REG_WRITE(DSPARB, 0x3f80);
 337         REG_WRITE(DSPFW1, 0x3f8f0404);
 338         REG_WRITE(DSPFW2, 0x04040f04);
 339         REG_WRITE(DSPFW3, 0x0);
 340         REG_WRITE(DSPFW4, 0x04040404);
 341         REG_WRITE(DSPFW5, 0x04040404);
 342         REG_WRITE(DSPFW6, 0x78);
 343         REG_WRITE(DSPCHICKENBIT, REG_READ(DSPCHICKENBIT) | 0xc040);
 344
 345         gma_power_end(dev);
 346 }
 347
 348 /**
 349  * Return the pipe currently connected to the panel fitter,
 350  * or -1 if the panel fitter is not present or not in use
 351  */
 352 static int oaktrail_panel_fitter_pipe(struct drm_device *dev)
 353 {
 354         u32 pfit_control;
 355
 356         pfit_control = REG_READ(PFIT_CONTROL);
 357
 358         /* See if the panel fitter is in use */
 359         if ((pfit_control & PFIT_ENABLE) == 0)
 360                 return -1;
 361         return (pfit_control >> 29) & 3;
 362 }
 363
 364 static int oaktrail_crtc_mode_set(struct drm_crtc *crtc,
 365                               struct drm_display_mode *mode,
 366                               struct drm_display_mode *adjusted_mode,
 367                               int x, int y,
 368                               struct drm_framebuffer *old_fb)
 369 {
 370         struct drm_device *dev = crtc->dev;
 371         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 372         struct drm_psb_private *dev_priv = dev->dev_private;
 373         int pipe = gma_crtc->pipe;
 374         const struct psb_offset *map = &dev_priv->regmap[pipe];
 375         int refclk = 0;
 376         struct gma_clock_t clock;
 377         const struct gma_limit_t *limit;
 378         u32 dpll = 0, fp = 0, dspcntr, pipeconf;
 379         bool ok, is_sdvo = false;
 380         bool is_lvds = false;
 381         bool is_mipi = false;
 382         struct drm_mode_config *mode_config = &dev->mode_config;
 383         struct gma_encoder *gma_encoder = NULL;
 384         uint64_t scalingType = DRM_MODE_SCALE_FULLSCREEN;
 385         struct drm_connector *connector;
 386         int i;
 387         int need_aux = gma_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ? 1 : 0;
 388
 389         if (gma_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
 390                 return oaktrail_crtc_hdmi_mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
 391
 392         if (!gma_power_begin(dev, true))
 393                 return 0;
 394
 395         memcpy(&gma_crtc->saved_mode,
 396                 mode,
 397                 sizeof(struct drm_display_mode));
 398         memcpy(&gma_crtc->saved_adjusted_mode,
 399                 adjusted_mode,
 400                 sizeof(struct drm_display_mode));
 401
 402         list_for_each_entry(connector, &mode_config->connector_list, head) {
 403                 if (!connector->encoder || connector->encoder->crtc != crtc)
 404                         continue;
 405
 406                 gma_encoder = gma_attached_encoder(connector);
 407
 408                 switch (gma_encoder->type) {
 409                 case INTEL_OUTPUT_LVDS:
 410                         is_lvds = true;
 411                         break;
 412                 case INTEL_OUTPUT_SDVO:
 413                         is_sdvo = true;
 414                         break;
 415                 case INTEL_OUTPUT_MIPI:
 416                         is_mipi = true;
 417                         break;
 418                 }
 419         }
 420
 421         /* Disable the VGA plane that we never use */
 422         for (i = 0; i <= need_aux; i++)
 423                 REG_WRITE_WITH_AUX(VGACNTRL, VGA_DISP_DISABLE, i);
 424
 425         /* Disable the panel fitter if it was on our pipe */
 426         if (oaktrail_panel_fitter_pipe(dev) == pipe)
 427                 REG_WRITE(PFIT_CONTROL, 0);
 428
 429         for (i = 0; i <= need_aux; i++) {
 430                 REG_WRITE_WITH_AUX(map->src, ((mode->crtc_hdisplay - 1) << 16) |
 431                                              (mode->crtc_vdisplay - 1), i);
 432         }
 433
 434         if (gma_encoder)
 435                 drm_object_property_get_value(&connector->base,
 436                         dev->mode_config.scaling_mode_property, &scalingType);
 437
 438         if (scalingType == DRM_MODE_SCALE_NO_SCALE) {
 439                 /* Moorestown doesn't have register support for centering so
 440                  * we need to mess with the h/vblank and h/vsync start and
 441                  * ends to get centering */
 442                 int offsetX = 0, offsetY = 0;
 443
 444                 offsetX = (adjusted_mode->crtc_hdisplay -
 445                            mode->crtc_hdisplay) / 2;
 446                 offsetY = (adjusted_mode->crtc_vdisplay -
 447                            mode->crtc_vdisplay) / 2;
 448
 449                 for (i = 0; i <= need_aux; i++) {
 450                         REG_WRITE_WITH_AUX(map->htotal, (mode->crtc_hdisplay - 1) |
 451                                 ((adjusted_mode->crtc_htotal - 1) << 16), i);
 452                         REG_WRITE_WITH_AUX(map->vtotal, (mode->crtc_vdisplay - 1) |
 453                                 ((adjusted_mode->crtc_vtotal - 1) << 16), i);
 454                         REG_WRITE_WITH_AUX(map->hblank,
 455                                 (adjusted_mode->crtc_hblank_start - offsetX - 1) |
 456                                 ((adjusted_mode->crtc_hblank_end - offsetX - 1) << 16), i);
 457                         REG_WRITE_WITH_AUX(map->hsync,
 458                                 (adjusted_mode->crtc_hsync_start - offsetX - 1) |
 459                                 ((adjusted_mode->crtc_hsync_end - offsetX - 1) << 16), i);
 460                         REG_WRITE_WITH_AUX(map->vblank,
 461                                 (adjusted_mode->crtc_vblank_start - offsetY - 1) |
 462                                 ((adjusted_mode->crtc_vblank_end - offsetY - 1) << 16), i);
 463                         REG_WRITE_WITH_AUX(map->vsync,
 464                                 (adjusted_mode->crtc_vsync_start - offsetY - 1) |
 465                                 ((adjusted_mode->crtc_vsync_end - offsetY - 1) << 16), i);
 466                 }
 467         } else {
 468                 for (i = 0; i <= need_aux; i++) {
 469                         REG_WRITE_WITH_AUX(map->htotal, (adjusted_mode->crtc_hdisplay - 1) |
 470                                 ((adjusted_mode->crtc_htotal - 1) << 16), i);
 471                         REG_WRITE_WITH_AUX(map->vtotal, (adjusted_mode->crtc_vdisplay - 1) |
 472                                 ((adjusted_mode->crtc_vtotal - 1) << 16), i);
 473                         REG_WRITE_WITH_AUX(map->hblank, (adjusted_mode->crtc_hblank_start - 1) |
 474                                 ((adjusted_mode->crtc_hblank_end - 1) << 16), i);
 475                         REG_WRITE_WITH_AUX(map->hsync, (adjusted_mode->crtc_hsync_start - 1) |
 476                                 ((adjusted_mode->crtc_hsync_end - 1) << 16), i);
 477                         REG_WRITE_WITH_AUX(map->vblank, (adjusted_mode->crtc_vblank_start - 1) |
 478                                 ((adjusted_mode->crtc_vblank_end - 1) << 16), i);
 479                         REG_WRITE_WITH_AUX(map->vsync, (adjusted_mode->crtc_vsync_start - 1) |
 480                                 ((adjusted_mode->crtc_vsync_end - 1) << 16), i);
 481                 }
 482         }
 483
 484         /* Flush the plane changes */
 485         {
 486                 const struct drm_crtc_helper_funcs *crtc_funcs =
 487                     crtc->helper_private;
 488                 crtc_funcs->mode_set_base(crtc, x, y, old_fb);
 489         }
 490
 491         /* setup pipeconf */
 492         pipeconf = REG_READ(map->conf);
 493
 494         /* Set up the display plane register */
 495         dspcntr = REG_READ(map->cntr);
 496         dspcntr |= DISPPLANE_GAMMA_ENABLE;
 497
 498         if (pipe == 0)
 499                 dspcntr |= DISPPLANE_SEL_PIPE_A;
 500         else
 501                 dspcntr |= DISPPLANE_SEL_PIPE_B;
 502
 503         if (is_mipi)
 504                 goto oaktrail_crtc_mode_set_exit;
 505
 506
 507         dpll = 0;               /*BIT16 = 0 for 100MHz reference */
 508
 509         refclk = is_sdvo ? 96000 : dev_priv->core_freq * 1000;
 510         limit = mrst_limit(crtc, refclk);
 511         ok = limit->find_pll(limit, crtc, adjusted_mode->clock,
 512                              refclk, &clock);
 513
 514         if (is_sdvo) {
 515                 /* Convert calculated values to register values */
 516                 clock.p1 = (1L << (clock.p1 - 1));
 517                 clock.m -= 2;
 518                 clock.n = (1L << (clock.n - 1));
 519         }
 520
 521         if (!ok)
 522                 DRM_ERROR("Failed to find proper PLL settings");
 523
 524         mrst_print_pll(&clock);
 525
 526         if (is_sdvo)
 527                 fp = clock.n << 16 | clock.m;
 528         else
 529                 fp = oaktrail_m_converts[(clock.m - MRST_M_MIN)] << 8;
 530
 531         dpll |= DPLL_VGA_MODE_DIS;
 532
 533
 534         dpll |= DPLL_VCO_ENABLE;
 535
 536         if (is_lvds)
 537                 dpll |= DPLLA_MODE_LVDS;
 538         else
 539                 dpll |= DPLLB_MODE_DAC_SERIAL;
 540
 541         if (is_sdvo) {
 542                 int sdvo_pixel_multiply =
 543                     adjusted_mode->clock / mode->clock;
 544
 545                 dpll |= DPLL_DVO_HIGH_SPEED;
 546                 dpll |=
 547                     (sdvo_pixel_multiply -
 548                      1) << SDVO_MULTIPLIER_SHIFT_HIRES;
 549         }
 550
 551
 552         /* compute bitmask from p1 value */
 553         if (is_sdvo)
 554                 dpll |= clock.p1 << 16; // dpll |= (1 << (clock.p1 - 1)) << 16;
 555         else
 556                 dpll |= (1 << (clock.p1 - 2)) << 17;
 557
 558         dpll |= DPLL_VCO_ENABLE;
 559
 560         if (dpll & DPLL_VCO_ENABLE) {
 561                 for (i = 0; i <= need_aux; i++) {
 562                         REG_WRITE_WITH_AUX(map->fp0, fp, i);
 563                         REG_WRITE_WITH_AUX(map->dpll, dpll & ~DPLL_VCO_ENABLE, i);
 564                         REG_READ_WITH_AUX(map->dpll, i);
 565                         /* Check the DPLLA lock bit PIPEACONF[29] */
 566                         udelay(150);
 567                 }
 568         }
 569
 570         for (i = 0; i <= need_aux; i++) {
 571                 REG_WRITE_WITH_AUX(map->fp0, fp, i);
 572                 REG_WRITE_WITH_AUX(map->dpll, dpll, i);
 573                 REG_READ_WITH_AUX(map->dpll, i);
 574                 /* Wait for the clocks to stabilize. */
 575                 udelay(150);
 576
 577                 /* write it again -- the BIOS does, after all */
 578                 REG_WRITE_WITH_AUX(map->dpll, dpll, i);
 579                 REG_READ_WITH_AUX(map->dpll, i);
 580                 /* Wait for the clocks to stabilize. */
 581                 udelay(150);
 582
 583                 REG_WRITE_WITH_AUX(map->conf, pipeconf, i);
 584                 REG_READ_WITH_AUX(map->conf, i);
 585                 gma_wait_for_vblank(dev);
 586
 587                 REG_WRITE_WITH_AUX(map->cntr, dspcntr, i);
 588                 gma_wait_for_vblank(dev);
 589         }
 590
 591 oaktrail_crtc_mode_set_exit:
 592         gma_power_end(dev);
 593         return 0;
 594 }
 595
 596 static int oaktrail_pipe_set_base(struct drm_crtc *crtc,
 597                             int x, int y, struct drm_framebuffer *old_fb)
 598 {
 599         struct drm_device *dev = crtc->dev;
 600         struct drm_psb_private *dev_priv = dev->dev_private;
 601         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 602         struct drm_framebuffer *fb = crtc->primary->fb;
 603         int pipe = gma_crtc->pipe;
 604         const struct psb_offset *map = &dev_priv->regmap[pipe];
 605         unsigned long start, offset;
 606
 607         u32 dspcntr;
 608         int ret = 0;
 609
 610         /* no fb bound */
 611         if (!fb) {
 612                 dev_dbg(dev->dev, "No FB bound\n");
 613                 return 0;
 614         }
 615
 616         if (!gma_power_begin(dev, true))
 617                 return 0;
 618
 619         start = to_gtt_range(fb->obj[0])->offset;
 620         offset = y * fb->pitches[0] + x * fb->format->cpp[0];
 621
 622         REG_WRITE(map->stride, fb->pitches[0]);
 623
 624         dspcntr = REG_READ(map->cntr);
 625         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
 626
 627         switch (fb->format->cpp[0] * 8) {
 628         case 8:
 629                 dspcntr |= DISPPLANE_8BPP;
 630                 break;
 631         case 16:
 632                 if (fb->format->depth == 15)
 633                         dspcntr |= DISPPLANE_15_16BPP;
 634                 else
 635                         dspcntr |= DISPPLANE_16BPP;
 636                 break;
 637         case 24:
 638         case 32:
 639                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
 640                 break;
 641         default:
 642                 dev_err(dev->dev, "Unknown color depth\n");
 643                 ret = -EINVAL;
 644                 goto pipe_set_base_exit;
 645         }
 646         REG_WRITE(map->cntr, dspcntr);
 647
 648         REG_WRITE(map->base, offset);
 649         REG_READ(map->base);
 650         REG_WRITE(map->surf, start);
 651         REG_READ(map->surf);
 652
 653 pipe_set_base_exit:
 654         gma_power_end(dev);
 655         return ret;
 656 }
 657
 658 const struct drm_crtc_helper_funcs oaktrail_helper_funcs = {
 659         .dpms = oaktrail_crtc_dpms,
 660         .mode_set = oaktrail_crtc_mode_set,
 661         .mode_set_base = oaktrail_pipe_set_base,
 662         .prepare = gma_crtc_prepare,
 663         .commit = gma_crtc_commit,
 664 };
 665
 666 /* Not used yet */
 667 const struct gma_clock_funcs mrst_clock_funcs = {
 668         .clock = mrst_lvds_clock,
 669         .limit = mrst_limit,
 670         .pll_is_valid = gma_pll_is_valid,
 671 };