LXR linux/drivers/gpu/drm/gma500/oaktrail

   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
  46static 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
  50static 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
  54static 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
  84static 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
  90static 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. */
 121static void mrst_lvds_clock(int refclk, struct gma_clock_t *clock)
 122{
 123        clock->dot = (refclk * clock->m) / (14 * clock->p1);
 124}
 125
 126static 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
 133static 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 */
 190static 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 */
 222static 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 */
 352static 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
 364static 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
 591oaktrail_crtc_mode_set_exit:
 592        gma_power_end(dev);
 593        return 0;
 594}
 595
 596static 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 psb_framebuffer *psbfb = to_psb_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 (!crtc->primary->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 = psbfb->gtt->offset;
 620        offset = y * crtc->primary->fb->pitches[0] + x * (crtc->primary->fb->bits_per_pixel / 8);
 621
 622        REG_WRITE(map->stride, crtc->primary->fb->pitches[0]);
 623
 624        dspcntr = REG_READ(map->cntr);
 625        dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
 626
 627        switch (crtc->primary->fb->bits_per_pixel) {
 628        case 8:
 629                dspcntr |= DISPPLANE_8BPP;
 630                break;
 631        case 16:
 632                if (crtc->primary->fb->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
 653pipe_set_base_exit:
 654        gma_power_end(dev);
 655        return ret;
 656}
 657
 658const struct drm_crtc_helper_funcs oaktrail_helper_funcs = {
 659        .dpms = oaktrail_crtc_dpms,
 660        .mode_fixup = gma_crtc_mode_fixup,
 661        .mode_set = oaktrail_crtc_mode_set,
 662        .mode_set_base = oaktrail_pipe_set_base,
 663        .prepare = gma_crtc_prepare,
 664        .commit = gma_crtc_commit,
 665};
 666
 667/* Not used yet */
 668const struct gma_clock_funcs mrst_clock_funcs = {
 669        .clock = mrst_lvds_clock,
 670        .limit = mrst_limit,
 671        .pll_is_valid = gma_pll_is_valid,
 672};
 673