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

   1 /*
   2  * Copyright 2006 Dave Airlie <airlied@linux.ie>
   3  * Copyright © 2006-2007 Intel Corporation
   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 <eric@anholt.net>
  26  */
  27
  28 #include <linux/i2c.h>
  29 #include <linux/slab.h>
  30
  31 #include <drm/drm_atomic_helper.h>
  32 #include <drm/drm_crtc.h>
  33
  34 #include "i915_drv.h"
  35 #include "intel_connector.h"
  36 #include "intel_display_types.h"
  37 #include "intel_dvo.h"
  38 #include "intel_dvo_dev.h"
  39 #include "intel_gmbus.h"
  40 #include "intel_panel.h"
  41
  42 #define INTEL_DVO_CHIP_NONE     0
  43 #define INTEL_DVO_CHIP_LVDS     1
  44 #define INTEL_DVO_CHIP_TMDS     2
  45 #define INTEL_DVO_CHIP_TVOUT    4
  46 #define INTEL_DVO_CHIP_LVDS_NO_FIXED    5
  47
  48 #define SIL164_ADDR     0x38
  49 #define CH7xxx_ADDR     0x76
  50 #define TFP410_ADDR     0x38
  51 #define NS2501_ADDR     0x38
  52
  53 static const struct intel_dvo_device intel_dvo_devices[] = {
  54         {
  55                 .type = INTEL_DVO_CHIP_TMDS,
  56                 .name = "sil164",
  57                 .dvo_reg = DVOC,
  58                 .dvo_srcdim_reg = DVOC_SRCDIM,
  59                 .slave_addr = SIL164_ADDR,
  60                 .dev_ops = &sil164_ops,
  61         },
  62         {
  63                 .type = INTEL_DVO_CHIP_TMDS,
  64                 .name = "ch7xxx",
  65                 .dvo_reg = DVOC,
  66                 .dvo_srcdim_reg = DVOC_SRCDIM,
  67                 .slave_addr = CH7xxx_ADDR,
  68                 .dev_ops = &ch7xxx_ops,
  69         },
  70         {
  71                 .type = INTEL_DVO_CHIP_TMDS,
  72                 .name = "ch7xxx",
  73                 .dvo_reg = DVOC,
  74                 .dvo_srcdim_reg = DVOC_SRCDIM,
  75                 .slave_addr = 0x75, /* For some ch7010 */
  76                 .dev_ops = &ch7xxx_ops,
  77         },
  78         {
  79                 .type = INTEL_DVO_CHIP_LVDS,
  80                 .name = "ivch",
  81                 .dvo_reg = DVOA,
  82                 .dvo_srcdim_reg = DVOA_SRCDIM,
  83                 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
  84                 .dev_ops = &ivch_ops,
  85         },
  86         {
  87                 .type = INTEL_DVO_CHIP_TMDS,
  88                 .name = "tfp410",
  89                 .dvo_reg = DVOC,
  90                 .dvo_srcdim_reg = DVOC_SRCDIM,
  91                 .slave_addr = TFP410_ADDR,
  92                 .dev_ops = &tfp410_ops,
  93         },
  94         {
  95                 .type = INTEL_DVO_CHIP_LVDS,
  96                 .name = "ch7017",
  97                 .dvo_reg = DVOC,
  98                 .dvo_srcdim_reg = DVOC_SRCDIM,
  99                 .slave_addr = 0x75,
 100                 .gpio = GMBUS_PIN_DPB,
 101                 .dev_ops = &ch7017_ops,
 102         },
 103         {
 104                 .type = INTEL_DVO_CHIP_LVDS_NO_FIXED,
 105                 .name = "ns2501",
 106                 .dvo_reg = DVOB,
 107                 .dvo_srcdim_reg = DVOB_SRCDIM,
 108                 .slave_addr = NS2501_ADDR,
 109                 .dev_ops = &ns2501_ops,
 110         },
 111 };
 112
 113 struct intel_dvo {
 114         struct intel_encoder base;
 115
 116         struct intel_dvo_device dev;
 117
 118         struct intel_connector *attached_connector;
 119
 120         bool panel_wants_dither;
 121 };
 122
 123 static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder)
 124 {
 125         return container_of(encoder, struct intel_dvo, base);
 126 }
 127
 128 static struct intel_dvo *intel_attached_dvo(struct intel_connector *connector)
 129 {
 130         return enc_to_dvo(intel_attached_encoder(connector));
 131 }
 132
 133 static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
 134 {
 135         struct drm_device *dev = connector->base.dev;
 136         struct drm_i915_private *dev_priv = to_i915(dev);
 137         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
 138         u32 tmp;
 139
 140         tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
 141
 142         if (!(tmp & DVO_ENABLE))
 143                 return false;
 144
 145         return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
 146 }
 147
 148 static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
 149                                    enum pipe *pipe)
 150 {
 151         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 152         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
 153         u32 tmp;
 154
 155         tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
 156
 157         *pipe = (tmp & DVO_PIPE_SEL_MASK) >> DVO_PIPE_SEL_SHIFT;
 158
 159         return tmp & DVO_ENABLE;
 160 }
 161
 162 static void intel_dvo_get_config(struct intel_encoder *encoder,
 163                                  struct intel_crtc_state *pipe_config)
 164 {
 165         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 166         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
 167         u32 tmp, flags = 0;
 168
 169         pipe_config->output_types |= BIT(INTEL_OUTPUT_DVO);
 170
 171         tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
 172         if (tmp & DVO_HSYNC_ACTIVE_HIGH)
 173                 flags |= DRM_MODE_FLAG_PHSYNC;
 174         else
 175                 flags |= DRM_MODE_FLAG_NHSYNC;
 176         if (tmp & DVO_VSYNC_ACTIVE_HIGH)
 177                 flags |= DRM_MODE_FLAG_PVSYNC;
 178         else
 179                 flags |= DRM_MODE_FLAG_NVSYNC;
 180
 181         pipe_config->hw.adjusted_mode.flags |= flags;
 182
 183         pipe_config->hw.adjusted_mode.crtc_clock = pipe_config->port_clock;
 184 }
 185
 186 static void intel_disable_dvo(struct intel_atomic_state *state,
 187                               struct intel_encoder *encoder,
 188                               const struct intel_crtc_state *old_crtc_state,
 189                               const struct drm_connector_state *old_conn_state)
 190 {
 191         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 192         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
 193         i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
 194         u32 temp = intel_de_read(dev_priv, dvo_reg);
 195
 196         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
 197         intel_de_write(dev_priv, dvo_reg, temp & ~DVO_ENABLE);
 198         intel_de_read(dev_priv, dvo_reg);
 199 }
 200
 201 static void intel_enable_dvo(struct intel_atomic_state *state,
 202                              struct intel_encoder *encoder,
 203                              const struct intel_crtc_state *pipe_config,
 204                              const struct drm_connector_state *conn_state)
 205 {
 206         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 207         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
 208         i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
 209         u32 temp = intel_de_read(dev_priv, dvo_reg);
 210
 211         intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev,
 212                                          &pipe_config->hw.mode,
 213                                          &pipe_config->hw.adjusted_mode);
 214
 215         intel_de_write(dev_priv, dvo_reg, temp | DVO_ENABLE);
 216         intel_de_read(dev_priv, dvo_reg);
 217
 218         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
 219 }
 220
 221 static enum drm_mode_status
 222 intel_dvo_mode_valid(struct drm_connector *connector,
 223                      struct drm_display_mode *mode)
 224 {
 225         struct intel_dvo *intel_dvo = intel_attached_dvo(to_intel_connector(connector));
 226         const struct drm_display_mode *fixed_mode =
 227                 to_intel_connector(connector)->panel.fixed_mode;
 228         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 229         int target_clock = mode->clock;
 230
 231         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 232                 return MODE_NO_DBLESCAN;
 233
 234         /* XXX: Validate clock range */
 235
 236         if (fixed_mode) {
 237                 if (mode->hdisplay > fixed_mode->hdisplay)
 238                         return MODE_PANEL;
 239                 if (mode->vdisplay > fixed_mode->vdisplay)
 240                         return MODE_PANEL;
 241
 242                 target_clock = fixed_mode->clock;
 243         }
 244
 245         if (target_clock > max_dotclk)
 246                 return MODE_CLOCK_HIGH;
 247
 248         return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
 249 }
 250
 251 static int intel_dvo_compute_config(struct intel_encoder *encoder,
 252                                     struct intel_crtc_state *pipe_config,
 253                                     struct drm_connector_state *conn_state)
 254 {
 255         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
 256         const struct drm_display_mode *fixed_mode =
 257                 intel_dvo->attached_connector->panel.fixed_mode;
 258         struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
 259
 260         /*
 261          * If we have timings from the BIOS for the panel, put them in
 262          * to the adjusted mode.  The CRTC will be set up for this mode,
 263          * with the panel scaling set up to source from the H/VDisplay
 264          * of the original mode.
 265          */
 266         if (fixed_mode)
 267                 intel_fixed_panel_mode(fixed_mode, adjusted_mode);
 268
 269         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 270                 return -EINVAL;
 271
 272         pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 273
 274         return 0;
 275 }
 276
 277 static void intel_dvo_pre_enable(struct intel_atomic_state *state,
 278                                  struct intel_encoder *encoder,
 279                                  const struct intel_crtc_state *pipe_config,
 280                                  const struct drm_connector_state *conn_state)
 281 {
 282         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 283         struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
 284         const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
 285         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
 286         enum pipe pipe = crtc->pipe;
 287         u32 dvo_val;
 288         i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
 289         i915_reg_t dvo_srcdim_reg = intel_dvo->dev.dvo_srcdim_reg;
 290
 291         /* Save the data order, since I don't know what it should be set to. */
 292         dvo_val = intel_de_read(dev_priv, dvo_reg) &
 293                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
 294         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
 295                    DVO_BLANK_ACTIVE_HIGH;
 296
 297         dvo_val |= DVO_PIPE_SEL(pipe);
 298         dvo_val |= DVO_PIPE_STALL;
 299         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 300                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
 301         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 302                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
 303
 304         intel_de_write(dev_priv, dvo_srcdim_reg,
 305                        (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
 306         intel_de_write(dev_priv, dvo_reg, dvo_val);
 307 }
 308
 309 static enum drm_connector_status
 310 intel_dvo_detect(struct drm_connector *connector, bool force)
 311 {
 312         struct drm_i915_private *i915 = to_i915(connector->dev);
 313         struct intel_dvo *intel_dvo = intel_attached_dvo(to_intel_connector(connector));
 314
 315         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
 316                       connector->base.id, connector->name);
 317
 318         if (!INTEL_DISPLAY_ENABLED(i915))
 319                 return connector_status_disconnected;
 320
 321         return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
 322 }
 323
 324 static int intel_dvo_get_modes(struct drm_connector *connector)
 325 {
 326         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 327         const struct drm_display_mode *fixed_mode =
 328                 to_intel_connector(connector)->panel.fixed_mode;
 329         int num_modes;
 330
 331         /*
 332          * We should probably have an i2c driver get_modes function for those
 333          * devices which will have a fixed set of modes determined by the chip
 334          * (TV-out, for example), but for now with just TMDS and LVDS,
 335          * that's not the case.
 336          */
 337         num_modes = intel_ddc_get_modes(connector,
 338                                         intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPC));
 339         if (num_modes)
 340                 return num_modes;
 341
 342         if (fixed_mode) {
 343                 struct drm_display_mode *mode;
 344
 345                 mode = drm_mode_duplicate(connector->dev, fixed_mode);
 346                 if (mode) {
 347                         drm_mode_probed_add(connector, mode);
 348                         num_modes++;
 349                 }
 350         }
 351
 352         return num_modes;
 353 }
 354
 355 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
 356         .detect = intel_dvo_detect,
 357         .late_register = intel_connector_register,
 358         .early_unregister = intel_connector_unregister,
 359         .destroy = intel_connector_destroy,
 360         .fill_modes = drm_helper_probe_single_connector_modes,
 361         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 362         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 363 };
 364
 365 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
 366         .mode_valid = intel_dvo_mode_valid,
 367         .get_modes = intel_dvo_get_modes,
 368 };
 369
 370 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
 371 {
 372         struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder));
 373
 374         if (intel_dvo->dev.dev_ops->destroy)
 375                 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
 376
 377         intel_encoder_destroy(encoder);
 378 }
 379
 380 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
 381         .destroy = intel_dvo_enc_destroy,
 382 };
 383
 384 /*
 385  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
 386  *
 387  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
 388  * chip being on DVOB/C and having multiple pipes.
 389  */
 390 static struct drm_display_mode *
 391 intel_dvo_get_current_mode(struct intel_encoder *encoder)
 392 {
 393         struct drm_display_mode *mode;
 394
 395         mode = intel_encoder_current_mode(encoder);
 396         if (mode) {
 397                 DRM_DEBUG_KMS("using current (BIOS) mode: ");
 398                 drm_mode_debug_printmodeline(mode);
 399                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 400         }
 401
 402         return mode;
 403 }
 404
 405 static enum port intel_dvo_port(i915_reg_t dvo_reg)
 406 {
 407         if (i915_mmio_reg_equal(dvo_reg, DVOA))
 408                 return PORT_A;
 409         else if (i915_mmio_reg_equal(dvo_reg, DVOB))
 410                 return PORT_B;
 411         else
 412                 return PORT_C;
 413 }
 414
 415 void intel_dvo_init(struct drm_i915_private *dev_priv)
 416 {
 417         struct intel_encoder *intel_encoder;
 418         struct intel_dvo *intel_dvo;
 419         struct intel_connector *intel_connector;
 420         int i;
 421         int encoder_type = DRM_MODE_ENCODER_NONE;
 422
 423         intel_dvo = kzalloc(sizeof(*intel_dvo), GFP_KERNEL);
 424         if (!intel_dvo)
 425                 return;
 426
 427         intel_connector = intel_connector_alloc();
 428         if (!intel_connector) {
 429                 kfree(intel_dvo);
 430                 return;
 431         }
 432
 433         intel_dvo->attached_connector = intel_connector;
 434
 435         intel_encoder = &intel_dvo->base;
 436
 437         intel_encoder->disable = intel_disable_dvo;
 438         intel_encoder->enable = intel_enable_dvo;
 439         intel_encoder->get_hw_state = intel_dvo_get_hw_state;
 440         intel_encoder->get_config = intel_dvo_get_config;
 441         intel_encoder->compute_config = intel_dvo_compute_config;
 442         intel_encoder->pre_enable = intel_dvo_pre_enable;
 443         intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
 444
 445         /* Now, try to find a controller */
 446         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
 447                 struct drm_connector *connector = &intel_connector->base;
 448                 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
 449                 struct i2c_adapter *i2c;
 450                 int gpio;
 451                 bool dvoinit;
 452                 enum pipe pipe;
 453                 u32 dpll[I915_MAX_PIPES];
 454                 enum port port;
 455
 456                 /*
 457                  * Allow the I2C driver info to specify the GPIO to be used in
 458                  * special cases, but otherwise default to what's defined
 459                  * in the spec.
 460                  */
 461                 if (intel_gmbus_is_valid_pin(dev_priv, dvo->gpio))
 462                         gpio = dvo->gpio;
 463                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
 464                         gpio = GMBUS_PIN_SSC;
 465                 else
 466                         gpio = GMBUS_PIN_DPB;
 467
 468                 /*
 469                  * Set up the I2C bus necessary for the chip we're probing.
 470                  * It appears that everything is on GPIOE except for panels
 471                  * on i830 laptops, which are on GPIOB (DVOA).
 472                  */
 473                 i2c = intel_gmbus_get_adapter(dev_priv, gpio);
 474
 475                 intel_dvo->dev = *dvo;
 476
 477                 /*
 478                  * GMBUS NAK handling seems to be unstable, hence let the
 479                  * transmitter detection run in bit banging mode for now.
 480                  */
 481                 intel_gmbus_force_bit(i2c, true);
 482
 483                 /*
 484                  * ns2501 requires the DVO 2x clock before it will
 485                  * respond to i2c accesses, so make sure we have
 486                  * have the clock enabled before we attempt to
 487                  * initialize the device.
 488                  */
 489                 for_each_pipe(dev_priv, pipe) {
 490                         dpll[pipe] = intel_de_read(dev_priv, DPLL(pipe));
 491                         intel_de_write(dev_priv, DPLL(pipe),
 492                                        dpll[pipe] | DPLL_DVO_2X_MODE);
 493                 }
 494
 495                 dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c);
 496
 497                 /* restore the DVO 2x clock state to original */
 498                 for_each_pipe(dev_priv, pipe) {
 499                         intel_de_write(dev_priv, DPLL(pipe), dpll[pipe]);
 500                 }
 501
 502                 intel_gmbus_force_bit(i2c, false);
 503
 504                 if (!dvoinit)
 505                         continue;
 506
 507                 port = intel_dvo_port(dvo->dvo_reg);
 508                 drm_encoder_init(&dev_priv->drm, &intel_encoder->base,
 509                                  &intel_dvo_enc_funcs, encoder_type,
 510                                  "DVO %c", port_name(port));
 511
 512                 intel_encoder->type = INTEL_OUTPUT_DVO;
 513                 intel_encoder->power_domain = POWER_DOMAIN_PORT_OTHER;
 514                 intel_encoder->port = port;
 515                 intel_encoder->pipe_mask = ~0;
 516
 517                 if (dvo->type != INTEL_DVO_CHIP_LVDS)
 518                         intel_encoder->cloneable = (1 << INTEL_OUTPUT_ANALOG) |
 519                                 (1 << INTEL_OUTPUT_DVO);
 520
 521                 switch (dvo->type) {
 522                 case INTEL_DVO_CHIP_TMDS:
 523                         intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT |
 524                                 DRM_CONNECTOR_POLL_DISCONNECT;
 525                         drm_connector_init(&dev_priv->drm, connector,
 526                                            &intel_dvo_connector_funcs,
 527                                            DRM_MODE_CONNECTOR_DVII);
 528                         encoder_type = DRM_MODE_ENCODER_TMDS;
 529                         break;
 530                 case INTEL_DVO_CHIP_LVDS_NO_FIXED:
 531                 case INTEL_DVO_CHIP_LVDS:
 532                         drm_connector_init(&dev_priv->drm, connector,
 533                                            &intel_dvo_connector_funcs,
 534                                            DRM_MODE_CONNECTOR_LVDS);
 535                         encoder_type = DRM_MODE_ENCODER_LVDS;
 536                         break;
 537                 }
 538
 539                 drm_connector_helper_add(connector,
 540                                          &intel_dvo_connector_helper_funcs);
 541                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 542                 connector->interlace_allowed = false;
 543                 connector->doublescan_allowed = false;
 544
 545                 intel_connector_attach_encoder(intel_connector, intel_encoder);
 546                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
 547                         /*
 548                          * For our LVDS chipsets, we should hopefully be able
 549                          * to dig the fixed panel mode out of the BIOS data.
 550                          * However, it's in a different format from the BIOS
 551                          * data on chipsets with integrated LVDS (stored in AIM
 552                          * headers, likely), so for now, just get the current
 553                          * mode being output through DVO.
 554                          */
 555                         intel_panel_init(&intel_connector->panel,
 556                                          intel_dvo_get_current_mode(intel_encoder),
 557                                          NULL);
 558                         intel_dvo->panel_wants_dither = true;
 559                 }
 560
 561                 return;
 562         }
 563
 564         kfree(intel_dvo);
 565         kfree(intel_connector);
 566 }