drivers/gpu/drm/i915/display/intel_lvds.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  * Copyright (c) 2006 Dave Airlie <[email protected]>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *      Eric Anholt <[email protected]>
  26  *      Dave Airlie <[email protected]>
  27  *      Jesse Barnes <[email protected]>
  28  */
  29
  30 #include <acpi/button.h>
  31 #include <linux/acpi.h>
  32 #include <linux/dmi.h>
  33 #include <linux/i2c.h>
  34 #include <linux/slab.h>
  35 #include <linux/vga_switcheroo.h>
  36
  37 #include <drm/drm_atomic_helper.h>
  38 #include <drm/drm_crtc.h>
  39 #include <drm/drm_edid.h>
  40
  41 #include "i915_drv.h"
  42 #include "i915_reg.h"
  43 #include "intel_atomic.h"
  44 #include "intel_backlight.h"
  45 #include "intel_connector.h"
  46 #include "intel_de.h"
  47 #include "intel_display_types.h"
  48 #include "intel_dpll.h"
  49 #include "intel_fdi.h"
  50 #include "intel_gmbus.h"
  51 #include "intel_lvds.h"
  52 #include "intel_lvds_regs.h"
  53 #include "intel_panel.h"
  54 #include "intel_pps_regs.h"
  55
  56 /* Private structure for the integrated LVDS support */
  57 struct intel_lvds_pps {
  58         /* 100us units */
  59         int t1_t2;
  60         int t3;
  61         int t4;
  62         int t5;
  63         int tx;
  64
  65         int divider;
  66
  67         int port;
  68         bool powerdown_on_reset;
  69 };
  70
  71 struct intel_lvds_encoder {
  72         struct intel_encoder base;
  73
  74         bool is_dual_link;
  75         i915_reg_t reg;
  76         u32 a3_power;
  77
  78         struct intel_lvds_pps init_pps;
  79         u32 init_lvds_val;
  80
  81         struct intel_connector *attached_connector;
  82 };
  83
  84 static struct intel_lvds_encoder *to_lvds_encoder(struct intel_encoder *encoder)
  85 {
  86         return container_of(encoder, struct intel_lvds_encoder, base);
  87 }
  88
  89 bool intel_lvds_port_enabled(struct drm_i915_private *i915,
  90                              i915_reg_t lvds_reg, enum pipe *pipe)
  91 {
  92         u32 val;
  93
  94         val = intel_de_read(i915, lvds_reg);
  95
  96         /* asserts want to know the pipe even if the port is disabled */
  97         if (HAS_PCH_CPT(i915))
  98                 *pipe = REG_FIELD_GET(LVDS_PIPE_SEL_MASK_CPT, val);
  99         else
 100                 *pipe = REG_FIELD_GET(LVDS_PIPE_SEL_MASK, val);
 101
 102         return val & LVDS_PORT_EN;
 103 }
 104
 105 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
 106                                     enum pipe *pipe)
 107 {
 108         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 109         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 110         intel_wakeref_t wakeref;
 111         bool ret;
 112
 113         wakeref = intel_display_power_get_if_enabled(i915, encoder->power_domain);
 114         if (!wakeref)
 115                 return false;
 116
 117         ret = intel_lvds_port_enabled(i915, lvds_encoder->reg, pipe);
 118
 119         intel_display_power_put(i915, encoder->power_domain, wakeref);
 120
 121         return ret;
 122 }
 123
 124 static void intel_lvds_get_config(struct intel_encoder *encoder,
 125                                   struct intel_crtc_state *crtc_state)
 126 {
 127         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 128         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 129         u32 tmp, flags = 0;
 130
 131         crtc_state->output_types |= BIT(INTEL_OUTPUT_LVDS);
 132
 133         tmp = intel_de_read(dev_priv, lvds_encoder->reg);
 134         if (tmp & LVDS_HSYNC_POLARITY)
 135                 flags |= DRM_MODE_FLAG_NHSYNC;
 136         else
 137                 flags |= DRM_MODE_FLAG_PHSYNC;
 138         if (tmp & LVDS_VSYNC_POLARITY)
 139                 flags |= DRM_MODE_FLAG_NVSYNC;
 140         else
 141                 flags |= DRM_MODE_FLAG_PVSYNC;
 142
 143         crtc_state->hw.adjusted_mode.flags |= flags;
 144
 145         if (DISPLAY_VER(dev_priv) < 5)
 146                 crtc_state->gmch_pfit.lvds_border_bits =
 147                         tmp & LVDS_BORDER_ENABLE;
 148
 149         /* gen2/3 store dither state in pfit control, needs to match */
 150         if (DISPLAY_VER(dev_priv) < 4) {
 151                 tmp = intel_de_read(dev_priv, PFIT_CONTROL);
 152
 153                 crtc_state->gmch_pfit.control |= tmp & PFIT_PANEL_8TO6_DITHER_ENABLE;
 154         }
 155
 156         crtc_state->hw.adjusted_mode.crtc_clock = crtc_state->port_clock;
 157 }
 158
 159 static void intel_lvds_pps_get_hw_state(struct drm_i915_private *dev_priv,
 160                                         struct intel_lvds_pps *pps)
 161 {
 162         u32 val;
 163
 164         pps->powerdown_on_reset = intel_de_read(dev_priv, PP_CONTROL(0)) & PANEL_POWER_RESET;
 165
 166         val = intel_de_read(dev_priv, PP_ON_DELAYS(0));
 167         pps->port = REG_FIELD_GET(PANEL_PORT_SELECT_MASK, val);
 168         pps->t1_t2 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, val);
 169         pps->t5 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, val);
 170
 171         val = intel_de_read(dev_priv, PP_OFF_DELAYS(0));
 172         pps->t3 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, val);
 173         pps->tx = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, val);
 174
 175         val = intel_de_read(dev_priv, PP_DIVISOR(0));
 176         pps->divider = REG_FIELD_GET(PP_REFERENCE_DIVIDER_MASK, val);
 177         val = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, val);
 178         /*
 179          * Remove the BSpec specified +1 (100ms) offset that accounts for a
 180          * too short power-cycle delay due to the asynchronous programming of
 181          * the register.
 182          */
 183         if (val)
 184                 val--;
 185         /* Convert from 100ms to 100us units */
 186         pps->t4 = val * 1000;
 187
 188         if (DISPLAY_VER(dev_priv) <= 4 &&
 189             pps->t1_t2 == 0 && pps->t5 == 0 && pps->t3 == 0 && pps->tx == 0) {
 190                 drm_dbg_kms(&dev_priv->drm,
 191                             "Panel power timings uninitialized, "
 192                             "setting defaults\n");
 193                 /* Set T2 to 40ms and T5 to 200ms in 100 usec units */
 194                 pps->t1_t2 = 40 * 10;
 195                 pps->t5 = 200 * 10;
 196                 /* Set T3 to 35ms and Tx to 200ms in 100 usec units */
 197                 pps->t3 = 35 * 10;
 198                 pps->tx = 200 * 10;
 199         }
 200
 201         drm_dbg(&dev_priv->drm, "LVDS PPS:t1+t2 %d t3 %d t4 %d t5 %d tx %d "
 202                 "divider %d port %d powerdown_on_reset %d\n",
 203                 pps->t1_t2, pps->t3, pps->t4, pps->t5, pps->tx,
 204                 pps->divider, pps->port, pps->powerdown_on_reset);
 205 }
 206
 207 static void intel_lvds_pps_init_hw(struct drm_i915_private *dev_priv,
 208                                    struct intel_lvds_pps *pps)
 209 {
 210         u32 val;
 211
 212         val = intel_de_read(dev_priv, PP_CONTROL(0));
 213         drm_WARN_ON(&dev_priv->drm,
 214                     (val & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS);
 215         if (pps->powerdown_on_reset)
 216                 val |= PANEL_POWER_RESET;
 217         intel_de_write(dev_priv, PP_CONTROL(0), val);
 218
 219         intel_de_write(dev_priv, PP_ON_DELAYS(0),
 220                        REG_FIELD_PREP(PANEL_PORT_SELECT_MASK, pps->port) |
 221                        REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, pps->t1_t2) |
 222                        REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, pps->t5));
 223
 224         intel_de_write(dev_priv, PP_OFF_DELAYS(0),
 225                        REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, pps->t3) |
 226                        REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, pps->tx));
 227
 228         intel_de_write(dev_priv, PP_DIVISOR(0),
 229                        REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, pps->divider) |
 230                        REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(pps->t4, 1000) + 1));
 231 }
 232
 233 static void intel_pre_enable_lvds(struct intel_atomic_state *state,
 234                                   struct intel_encoder *encoder,
 235                                   const struct intel_crtc_state *crtc_state,
 236                                   const struct drm_connector_state *conn_state)
 237 {
 238         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 239         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 240         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 241         const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
 242         enum pipe pipe = crtc->pipe;
 243         u32 temp;
 244
 245         if (HAS_PCH_SPLIT(i915)) {
 246                 assert_fdi_rx_pll_disabled(i915, pipe);
 247                 assert_shared_dpll_disabled(i915, crtc_state->shared_dpll);
 248         } else {
 249                 assert_pll_disabled(i915, pipe);
 250         }
 251
 252         intel_lvds_pps_init_hw(i915, &lvds_encoder->init_pps);
 253
 254         temp = lvds_encoder->init_lvds_val;
 255         temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
 256
 257         if (HAS_PCH_CPT(i915)) {
 258                 temp &= ~LVDS_PIPE_SEL_MASK_CPT;
 259                 temp |= LVDS_PIPE_SEL_CPT(pipe);
 260         } else {
 261                 temp &= ~LVDS_PIPE_SEL_MASK;
 262                 temp |= LVDS_PIPE_SEL(pipe);
 263         }
 264
 265         /* set the corresponsding LVDS_BORDER bit */
 266         temp &= ~LVDS_BORDER_ENABLE;
 267         temp |= crtc_state->gmch_pfit.lvds_border_bits;
 268
 269         /*
 270          * Set the B0-B3 data pairs corresponding to whether we're going to
 271          * set the DPLLs for dual-channel mode or not.
 272          */
 273         if (lvds_encoder->is_dual_link)
 274                 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
 275         else
 276                 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
 277
 278         /*
 279          * It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
 280          * appropriately here, but we need to look more thoroughly into how
 281          * panels behave in the two modes. For now, let's just maintain the
 282          * value we got from the BIOS.
 283          */
 284         temp &= ~LVDS_A3_POWER_MASK;
 285         temp |= lvds_encoder->a3_power;
 286
 287         /*
 288          * Set the dithering flag on LVDS as needed, note that there is no
 289          * special lvds dither control bit on pch-split platforms, dithering is
 290          * only controlled through the TRANSCONF reg.
 291          */
 292         if (DISPLAY_VER(i915) == 4) {
 293                 /*
 294                  * Bspec wording suggests that LVDS port dithering only exists
 295                  * for 18bpp panels.
 296                  */
 297                 if (crtc_state->dither && crtc_state->pipe_bpp == 18)
 298                         temp |= LVDS_ENABLE_DITHER;
 299                 else
 300                         temp &= ~LVDS_ENABLE_DITHER;
 301         }
 302         temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
 303         if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
 304                 temp |= LVDS_HSYNC_POLARITY;
 305         if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
 306                 temp |= LVDS_VSYNC_POLARITY;
 307
 308         intel_de_write(i915, lvds_encoder->reg, temp);
 309 }
 310
 311 /*
 312  * Sets the power state for the panel.
 313  */
 314 static void intel_enable_lvds(struct intel_atomic_state *state,
 315                               struct intel_encoder *encoder,
 316                               const struct intel_crtc_state *crtc_state,
 317                               const struct drm_connector_state *conn_state)
 318 {
 319         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 320         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 321
 322         intel_de_rmw(dev_priv, lvds_encoder->reg, 0, LVDS_PORT_EN);
 323
 324         intel_de_rmw(dev_priv, PP_CONTROL(0), 0, PANEL_POWER_ON);
 325         intel_de_posting_read(dev_priv, lvds_encoder->reg);
 326
 327         if (intel_de_wait_for_set(dev_priv, PP_STATUS(0), PP_ON, 5000))
 328                 drm_err(&dev_priv->drm,
 329                         "timed out waiting for panel to power on\n");
 330
 331         intel_backlight_enable(crtc_state, conn_state);
 332 }
 333
 334 static void intel_disable_lvds(struct intel_atomic_state *state,
 335                                struct intel_encoder *encoder,
 336                                const struct intel_crtc_state *old_crtc_state,
 337                                const struct drm_connector_state *old_conn_state)
 338 {
 339         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 340         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 341
 342         intel_de_rmw(dev_priv, PP_CONTROL(0), PANEL_POWER_ON, 0);
 343         if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_ON, 1000))
 344                 drm_err(&dev_priv->drm,
 345                         "timed out waiting for panel to power off\n");
 346
 347         intel_de_rmw(dev_priv, lvds_encoder->reg, LVDS_PORT_EN, 0);
 348         intel_de_posting_read(dev_priv, lvds_encoder->reg);
 349 }
 350
 351 static void gmch_disable_lvds(struct intel_atomic_state *state,
 352                               struct intel_encoder *encoder,
 353                               const struct intel_crtc_state *old_crtc_state,
 354                               const struct drm_connector_state *old_conn_state)
 355
 356 {
 357         intel_backlight_disable(old_conn_state);
 358
 359         intel_disable_lvds(state, encoder, old_crtc_state, old_conn_state);
 360 }
 361
 362 static void pch_disable_lvds(struct intel_atomic_state *state,
 363                              struct intel_encoder *encoder,
 364                              const struct intel_crtc_state *old_crtc_state,
 365                              const struct drm_connector_state *old_conn_state)
 366 {
 367         intel_backlight_disable(old_conn_state);
 368 }
 369
 370 static void pch_post_disable_lvds(struct intel_atomic_state *state,
 371                                   struct intel_encoder *encoder,
 372                                   const struct intel_crtc_state *old_crtc_state,
 373                                   const struct drm_connector_state *old_conn_state)
 374 {
 375         intel_disable_lvds(state, encoder, old_crtc_state, old_conn_state);
 376 }
 377
 378 static void intel_lvds_shutdown(struct intel_encoder *encoder)
 379 {
 380         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 381
 382         if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_CYCLE_DELAY_ACTIVE, 5000))
 383                 drm_err(&dev_priv->drm,
 384                         "timed out waiting for panel power cycle delay\n");
 385 }
 386
 387 static enum drm_mode_status
 388 intel_lvds_mode_valid(struct drm_connector *_connector,
 389                       struct drm_display_mode *mode)
 390 {
 391         struct intel_connector *connector = to_intel_connector(_connector);
 392         const struct drm_display_mode *fixed_mode =
 393                 intel_panel_fixed_mode(connector, mode);
 394         int max_pixclk = to_i915(connector->base.dev)->max_dotclk_freq;
 395         enum drm_mode_status status;
 396
 397         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 398                 return MODE_NO_DBLESCAN;
 399
 400         status = intel_panel_mode_valid(connector, mode);
 401         if (status != MODE_OK)
 402                 return status;
 403
 404         if (fixed_mode->clock > max_pixclk)
 405                 return MODE_CLOCK_HIGH;
 406
 407         return MODE_OK;
 408 }
 409
 410 static int intel_lvds_compute_config(struct intel_encoder *encoder,
 411                                      struct intel_crtc_state *crtc_state,
 412                                      struct drm_connector_state *conn_state)
 413 {
 414         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 415         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 416         struct intel_connector *connector = lvds_encoder->attached_connector;
 417         struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
 418         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 419         unsigned int lvds_bpp;
 420         int ret;
 421
 422         /* Should never happen!! */
 423         if (DISPLAY_VER(i915) < 4 && crtc->pipe == 0) {
 424                 drm_err(&i915->drm, "Can't support LVDS on pipe A\n");
 425                 return -EINVAL;
 426         }
 427
 428         if (lvds_encoder->a3_power == LVDS_A3_POWER_UP)
 429                 lvds_bpp = 8*3;
 430         else
 431                 lvds_bpp = 6*3;
 432
 433         if (lvds_bpp != crtc_state->pipe_bpp && !crtc_state->bw_constrained) {
 434                 drm_dbg_kms(&i915->drm,
 435                             "forcing display bpp (was %d) to LVDS (%d)\n",
 436                             crtc_state->pipe_bpp, lvds_bpp);
 437                 crtc_state->pipe_bpp = lvds_bpp;
 438         }
 439
 440         crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
 441         crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
 442
 443         /*
 444          * We have timings from the BIOS for the panel, put them in
 445          * to the adjusted mode.  The CRTC will be set up for this mode,
 446          * with the panel scaling set up to source from the H/VDisplay
 447          * of the original mode.
 448          */
 449         ret = intel_panel_compute_config(connector, adjusted_mode);
 450         if (ret)
 451                 return ret;
 452
 453         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 454                 return -EINVAL;
 455
 456         if (HAS_PCH_SPLIT(i915))
 457                 crtc_state->has_pch_encoder = true;
 458
 459         ret = intel_panel_fitting(crtc_state, conn_state);
 460         if (ret)
 461                 return ret;
 462
 463         /*
 464          * XXX: It would be nice to support lower refresh rates on the
 465          * panels to reduce power consumption, and perhaps match the
 466          * user's requested refresh rate.
 467          */
 468
 469         return 0;
 470 }
 471
 472 /*
 473  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 474  */
 475 static int intel_lvds_get_modes(struct drm_connector *_connector)
 476 {
 477         struct intel_connector *connector = to_intel_connector(_connector);
 478         const struct drm_edid *fixed_edid = connector->panel.fixed_edid;
 479
 480         /* Use panel fixed edid if we have one */
 481         if (!IS_ERR_OR_NULL(fixed_edid)) {
 482                 drm_edid_connector_update(&connector->base, fixed_edid);
 483
 484                 return drm_edid_connector_add_modes(&connector->base);
 485         }
 486
 487         return intel_panel_get_modes(connector);
 488 }
 489
 490 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
 491         .get_modes = intel_lvds_get_modes,
 492         .mode_valid = intel_lvds_mode_valid,
 493         .atomic_check = intel_digital_connector_atomic_check,
 494 };
 495
 496 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
 497         .detect = intel_panel_detect,
 498         .fill_modes = drm_helper_probe_single_connector_modes,
 499         .atomic_get_property = intel_digital_connector_atomic_get_property,
 500         .atomic_set_property = intel_digital_connector_atomic_set_property,
 501         .late_register = intel_connector_register,
 502         .early_unregister = intel_connector_unregister,
 503         .destroy = intel_connector_destroy,
 504         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 505         .atomic_duplicate_state = intel_digital_connector_duplicate_state,
 506 };
 507
 508 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
 509         .destroy = intel_encoder_destroy,
 510 };
 511
 512 static int intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
 513 {
 514         DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
 515         return 1;
 516 }
 517
 518 /* These systems claim to have LVDS, but really don't */
 519 static const struct dmi_system_id intel_no_lvds[] = {
 520         {
 521                 .callback = intel_no_lvds_dmi_callback,
 522                 .ident = "Apple Mac Mini (Core series)",
 523                 .matches = {
 524                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 525                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
 526                 },
 527         },
 528         {
 529                 .callback = intel_no_lvds_dmi_callback,
 530                 .ident = "Apple Mac Mini (Core 2 series)",
 531                 .matches = {
 532                         DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
 533                         DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
 534                 },
 535         },
 536         {
 537                 .callback = intel_no_lvds_dmi_callback,
 538                 .ident = "MSI IM-945GSE-A",
 539                 .matches = {
 540                         DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
 541                         DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
 542                 },
 543         },
 544         {
 545                 .callback = intel_no_lvds_dmi_callback,
 546                 .ident = "Dell Studio Hybrid",
 547                 .matches = {
 548                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 549                         DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
 550                 },
 551         },
 552         {
 553                 .callback = intel_no_lvds_dmi_callback,
 554                 .ident = "Dell OptiPlex FX170",
 555                 .matches = {
 556                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 557                         DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
 558                 },
 559         },
 560         {
 561                 .callback = intel_no_lvds_dmi_callback,
 562                 .ident = "AOpen Mini PC",
 563                 .matches = {
 564                         DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
 565                         DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
 566                 },
 567         },
 568         {
 569                 .callback = intel_no_lvds_dmi_callback,
 570                 .ident = "AOpen Mini PC MP915",
 571                 .matches = {
 572                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 573                         DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
 574                 },
 575         },
 576         {
 577                 .callback = intel_no_lvds_dmi_callback,
 578                 .ident = "AOpen i915GMm-HFS",
 579                 .matches = {
 580                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 581                         DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
 582                 },
 583         },
 584         {
 585                 .callback = intel_no_lvds_dmi_callback,
 586                 .ident = "AOpen i45GMx-I",
 587                 .matches = {
 588                         DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
 589                         DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
 590                 },
 591         },
 592         {
 593                 .callback = intel_no_lvds_dmi_callback,
 594                 .ident = "Aopen i945GTt-VFA",
 595                 .matches = {
 596                         DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
 597                 },
 598         },
 599         {
 600                 .callback = intel_no_lvds_dmi_callback,
 601                 .ident = "Clientron U800",
 602                 .matches = {
 603                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 604                         DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
 605                 },
 606         },
 607         {
 608                 .callback = intel_no_lvds_dmi_callback,
 609                 .ident = "Clientron E830",
 610                 .matches = {
 611                         DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
 612                         DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
 613                 },
 614         },
 615         {
 616                 .callback = intel_no_lvds_dmi_callback,
 617                 .ident = "Asus EeeBox PC EB1007",
 618                 .matches = {
 619                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 620                         DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
 621                 },
 622         },
 623         {
 624                 .callback = intel_no_lvds_dmi_callback,
 625                 .ident = "Asus AT5NM10T-I",
 626                 .matches = {
 627                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 628                         DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
 629                 },
 630         },
 631         {
 632                 .callback = intel_no_lvds_dmi_callback,
 633                 .ident = "Hewlett-Packard HP t5740",
 634                 .matches = {
 635                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 636                         DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
 637                 },
 638         },
 639         {
 640                 .callback = intel_no_lvds_dmi_callback,
 641                 .ident = "Hewlett-Packard t5745",
 642                 .matches = {
 643                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 644                         DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
 645                 },
 646         },
 647         {
 648                 .callback = intel_no_lvds_dmi_callback,
 649                 .ident = "Hewlett-Packard st5747",
 650                 .matches = {
 651                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 652                         DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
 653                 },
 654         },
 655         {
 656                 .callback = intel_no_lvds_dmi_callback,
 657                 .ident = "MSI Wind Box DC500",
 658                 .matches = {
 659                         DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
 660                         DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
 661                 },
 662         },
 663         {
 664                 .callback = intel_no_lvds_dmi_callback,
 665                 .ident = "Gigabyte GA-D525TUD",
 666                 .matches = {
 667                         DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
 668                         DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
 669                 },
 670         },
 671         {
 672                 .callback = intel_no_lvds_dmi_callback,
 673                 .ident = "Supermicro X7SPA-H",
 674                 .matches = {
 675                         DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
 676                         DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
 677                 },
 678         },
 679         {
 680                 .callback = intel_no_lvds_dmi_callback,
 681                 .ident = "Fujitsu Esprimo Q900",
 682                 .matches = {
 683                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 684                         DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
 685                 },
 686         },
 687         {
 688                 .callback = intel_no_lvds_dmi_callback,
 689                 .ident = "Intel D410PT",
 690                 .matches = {
 691                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 692                         DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
 693                 },
 694         },
 695         {
 696                 .callback = intel_no_lvds_dmi_callback,
 697                 .ident = "Intel D425KT",
 698                 .matches = {
 699                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 700                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
 701                 },
 702         },
 703         {
 704                 .callback = intel_no_lvds_dmi_callback,
 705                 .ident = "Intel D510MO",
 706                 .matches = {
 707                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 708                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
 709                 },
 710         },
 711         {
 712                 .callback = intel_no_lvds_dmi_callback,
 713                 .ident = "Intel D525MW",
 714                 .matches = {
 715                         DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
 716                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
 717                 },
 718         },
 719         {
 720                 .callback = intel_no_lvds_dmi_callback,
 721                 .ident = "Radiant P845",
 722                 .matches = {
 723                         DMI_MATCH(DMI_SYS_VENDOR, "Radiant Systems Inc"),
 724                         DMI_MATCH(DMI_PRODUCT_NAME, "P845"),
 725                 },
 726         },
 727
 728         { }     /* terminating entry */
 729 };
 730
 731 static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
 732 {
 733         DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
 734         return 1;
 735 }
 736
 737 static const struct dmi_system_id intel_dual_link_lvds[] = {
 738         {
 739                 .callback = intel_dual_link_lvds_callback,
 740                 .ident = "Apple MacBook Pro 15\" (2010)",
 741                 .matches = {
 742                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 743                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6,2"),
 744                 },
 745         },
 746         {
 747                 .callback = intel_dual_link_lvds_callback,
 748                 .ident = "Apple MacBook Pro 15\" (2011)",
 749                 .matches = {
 750                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 751                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
 752                 },
 753         },
 754         {
 755                 .callback = intel_dual_link_lvds_callback,
 756                 .ident = "Apple MacBook Pro 15\" (2012)",
 757                 .matches = {
 758                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 759                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,1"),
 760                 },
 761         },
 762         { }     /* terminating entry */
 763 };
 764
 765 struct intel_encoder *intel_get_lvds_encoder(struct drm_i915_private *i915)
 766 {
 767         struct intel_encoder *encoder;
 768
 769         for_each_intel_encoder(&i915->drm, encoder) {
 770                 if (encoder->type == INTEL_OUTPUT_LVDS)
 771                         return encoder;
 772         }
 773
 774         return NULL;
 775 }
 776
 777 bool intel_is_dual_link_lvds(struct drm_i915_private *i915)
 778 {
 779         struct intel_encoder *encoder = intel_get_lvds_encoder(i915);
 780
 781         return encoder && to_lvds_encoder(encoder)->is_dual_link;
 782 }
 783
 784 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
 785 {
 786         struct drm_i915_private *i915 = to_i915(lvds_encoder->base.base.dev);
 787         struct intel_connector *connector = lvds_encoder->attached_connector;
 788         const struct drm_display_mode *fixed_mode =
 789                 intel_panel_preferred_fixed_mode(connector);
 790         unsigned int val;
 791
 792         /* use the module option value if specified */
 793         if (i915->params.lvds_channel_mode > 0)
 794                 return i915->params.lvds_channel_mode == 2;
 795
 796         /* single channel LVDS is limited to 112 MHz */
 797         if (fixed_mode->clock > 112999)
 798                 return true;
 799
 800         if (dmi_check_system(intel_dual_link_lvds))
 801                 return true;
 802
 803         /*
 804          * BIOS should set the proper LVDS register value at boot, but
 805          * in reality, it doesn't set the value when the lid is closed;
 806          * we need to check "the value to be set" in VBT when LVDS
 807          * register is uninitialized.
 808          */
 809         val = intel_de_read(i915, lvds_encoder->reg);
 810         if (HAS_PCH_CPT(i915))
 811                 val &= ~(LVDS_DETECTED | LVDS_PIPE_SEL_MASK_CPT);
 812         else
 813                 val &= ~(LVDS_DETECTED | LVDS_PIPE_SEL_MASK);
 814         if (val == 0)
 815                 val = connector->panel.vbt.bios_lvds_val;
 816
 817         return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
 818 }
 819
 820 static void intel_lvds_add_properties(struct drm_connector *connector)
 821 {
 822         intel_attach_scaling_mode_property(connector);
 823 }
 824
 825 /**
 826  * intel_lvds_init - setup LVDS connectors on this device
 827  * @i915: i915 device
 828  *
 829  * Create the connector, register the LVDS DDC bus, and try to figure out what
 830  * modes we can display on the LVDS panel (if present).
 831  */
 832 void intel_lvds_init(struct drm_i915_private *i915)
 833 {
 834         struct intel_lvds_encoder *lvds_encoder;
 835         struct intel_connector *connector;
 836         const struct drm_edid *drm_edid;
 837         struct intel_encoder *encoder;
 838         i915_reg_t lvds_reg;
 839         u32 lvds;
 840         u8 pin;
 841
 842         /* Skip init on machines we know falsely report LVDS */
 843         if (dmi_check_system(intel_no_lvds)) {
 844                 drm_WARN(&i915->drm, !i915->display.vbt.int_lvds_support,
 845                          "Useless DMI match. Internal LVDS support disabled by VBT\n");
 846                 return;
 847         }
 848
 849         if (!i915->display.vbt.int_lvds_support) {
 850                 drm_dbg_kms(&i915->drm,
 851                             "Internal LVDS support disabled by VBT\n");
 852                 return;
 853         }
 854
 855         if (HAS_PCH_SPLIT(i915))
 856                 lvds_reg = PCH_LVDS;
 857         else
 858                 lvds_reg = LVDS;
 859
 860         lvds = intel_de_read(i915, lvds_reg);
 861
 862         if (HAS_PCH_SPLIT(i915)) {
 863                 if ((lvds & LVDS_DETECTED) == 0)
 864                         return;
 865         }
 866
 867         pin = GMBUS_PIN_PANEL;
 868         if (!intel_bios_is_lvds_present(i915, &pin)) {
 869                 if ((lvds & LVDS_PORT_EN) == 0) {
 870                         drm_dbg_kms(&i915->drm,
 871                                     "LVDS is not present in VBT\n");
 872                         return;
 873                 }
 874                 drm_dbg_kms(&i915->drm,
 875                             "LVDS is not present in VBT, but enabled anyway\n");
 876         }
 877
 878         lvds_encoder = kzalloc(sizeof(*lvds_encoder), GFP_KERNEL);
 879         if (!lvds_encoder)
 880                 return;
 881
 882         connector = intel_connector_alloc();
 883         if (!connector) {
 884                 kfree(lvds_encoder);
 885                 return;
 886         }
 887
 888         lvds_encoder->attached_connector = connector;
 889         encoder = &lvds_encoder->base;
 890
 891         drm_connector_init(&i915->drm, &connector->base, &intel_lvds_connector_funcs,
 892                            DRM_MODE_CONNECTOR_LVDS);
 893
 894         drm_encoder_init(&i915->drm, &encoder->base, &intel_lvds_enc_funcs,
 895                          DRM_MODE_ENCODER_LVDS, "LVDS");
 896
 897         encoder->enable = intel_enable_lvds;
 898         encoder->pre_enable = intel_pre_enable_lvds;
 899         encoder->compute_config = intel_lvds_compute_config;
 900         if (HAS_PCH_SPLIT(i915)) {
 901                 encoder->disable = pch_disable_lvds;
 902                 encoder->post_disable = pch_post_disable_lvds;
 903         } else {
 904                 encoder->disable = gmch_disable_lvds;
 905         }
 906         encoder->get_hw_state = intel_lvds_get_hw_state;
 907         encoder->get_config = intel_lvds_get_config;
 908         encoder->update_pipe = intel_backlight_update;
 909         encoder->shutdown = intel_lvds_shutdown;
 910         connector->get_hw_state = intel_connector_get_hw_state;
 911
 912         intel_connector_attach_encoder(connector, encoder);
 913
 914         encoder->type = INTEL_OUTPUT_LVDS;
 915         encoder->power_domain = POWER_DOMAIN_PORT_OTHER;
 916         encoder->port = PORT_NONE;
 917         encoder->cloneable = 0;
 918         if (DISPLAY_VER(i915) < 4)
 919                 encoder->pipe_mask = BIT(PIPE_B);
 920         else
 921                 encoder->pipe_mask = ~0;
 922
 923         drm_connector_helper_add(&connector->base, &intel_lvds_connector_helper_funcs);
 924         connector->base.display_info.subpixel_order = SubPixelHorizontalRGB;
 925
 926         lvds_encoder->reg = lvds_reg;
 927
 928         intel_lvds_add_properties(&connector->base);
 929
 930         intel_lvds_pps_get_hw_state(i915, &lvds_encoder->init_pps);
 931         lvds_encoder->init_lvds_val = lvds;
 932
 933         /*
 934          * LVDS discovery:
 935          * 1) check for EDID on DDC
 936          * 2) check for VBT data
 937          * 3) check to see if LVDS is already on
 938          *    if none of the above, no panel
 939          */
 940
 941         /*
 942          * Attempt to get the fixed panel mode from DDC.  Assume that the
 943          * preferred mode is the right one.
 944          */
 945         mutex_lock(&i915->drm.mode_config.mutex);
 946         if (vga_switcheroo_handler_flags() & VGA_SWITCHEROO_CAN_SWITCH_DDC) {
 947                 drm_edid = drm_edid_read_switcheroo(&connector->base,
 948                                                     intel_gmbus_get_adapter(i915, pin));
 949         } else {
 950                 drm_edid = drm_edid_read_ddc(&connector->base,
 951                                              intel_gmbus_get_adapter(i915, pin));
 952         }
 953         if (drm_edid) {
 954                 if (drm_edid_connector_update(&connector->base, drm_edid) ||
 955                     !drm_edid_connector_add_modes(&connector->base)) {
 956                         drm_edid_connector_update(&connector->base, NULL);
 957                         drm_edid_free(drm_edid);
 958                         drm_edid = ERR_PTR(-EINVAL);
 959                 }
 960         } else {
 961                 drm_edid = ERR_PTR(-ENOENT);
 962         }
 963         intel_bios_init_panel_late(i915, &connector->panel, NULL,
 964                                    IS_ERR(drm_edid) ? NULL : drm_edid);
 965
 966         /* Try EDID first */
 967         intel_panel_add_edid_fixed_modes(connector, true);
 968
 969         /* Failed to get EDID, what about VBT? */
 970         if (!intel_panel_preferred_fixed_mode(connector))
 971                 intel_panel_add_vbt_lfp_fixed_mode(connector);
 972
 973         /*
 974          * If we didn't get a fixed mode from EDID or VBT, try checking
 975          * if the panel is already turned on.  If so, assume that
 976          * whatever is currently programmed is the correct mode.
 977          */
 978         if (!intel_panel_preferred_fixed_mode(connector))
 979                 intel_panel_add_encoder_fixed_mode(connector, encoder);
 980
 981         mutex_unlock(&i915->drm.mode_config.mutex);
 982
 983         /* If we still don't have a mode after all that, give up. */
 984         if (!intel_panel_preferred_fixed_mode(connector))
 985                 goto failed;
 986
 987         intel_panel_init(connector, drm_edid);
 988
 989         intel_backlight_setup(connector, INVALID_PIPE);
 990
 991         lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
 992         drm_dbg_kms(&i915->drm, "detected %s-link lvds configuration\n",
 993                     lvds_encoder->is_dual_link ? "dual" : "single");
 994
 995         lvds_encoder->a3_power = lvds & LVDS_A3_POWER_MASK;
 996
 997         return;
 998
 999 failed:
1000         drm_dbg_kms(&i915->drm, "No LVDS modes found, disabling.\n");
1001         drm_connector_cleanup(&connector->base);
1002         drm_encoder_cleanup(&encoder->base);
1003         kfree(lvds_encoder);
1004         intel_connector_free(connector);
1005         return;
1006 }