git.oblomov.eu Git - linux-2.6/blob - drivers/gpu/drm/i915/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 #include <linux/i2c.h>
  28 #include "drmP.h"
  29 #include "drm.h"
  30 #include "drm_crtc.h"
  31 #include "intel_drv.h"
  32 #include "i915_drm.h"
  33 #include "i915_drv.h"
  34 #include "dvo.h"
  35
  36 #define SIL164_ADDR     0x38
  37 #define CH7xxx_ADDR     0x76
  38 #define TFP410_ADDR     0x38
  39
  40 extern struct intel_dvo_dev_ops sil164_ops;
  41 extern struct intel_dvo_dev_ops ch7xxx_ops;
  42 extern struct intel_dvo_dev_ops ivch_ops;
  43 extern struct intel_dvo_dev_ops tfp410_ops;
  44 extern struct intel_dvo_dev_ops ch7017_ops;
  45
  46 static struct intel_dvo_device intel_dvo_devices[] = {
  47         {
  48                 .type = INTEL_DVO_CHIP_TMDS,
  49                 .name = "sil164",
  50                 .dvo_reg = DVOC,
  51                 .slave_addr = SIL164_ADDR,
  52                 .dev_ops = &sil164_ops,
  53         },
  54         {
  55                 .type = INTEL_DVO_CHIP_TMDS,
  56                 .name = "ch7xxx",
  57                 .dvo_reg = DVOC,
  58                 .slave_addr = CH7xxx_ADDR,
  59                 .dev_ops = &ch7xxx_ops,
  60         },
  61         {
  62                 .type = INTEL_DVO_CHIP_LVDS,
  63                 .name = "ivch",
  64                 .dvo_reg = DVOA,
  65                 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
  66                 .dev_ops = &ivch_ops,
  67         },
  68         {
  69                 .type = INTEL_DVO_CHIP_TMDS,
  70                 .name = "tfp410",
  71                 .dvo_reg = DVOC,
  72                 .slave_addr = TFP410_ADDR,
  73                 .dev_ops = &tfp410_ops,
  74         },
  75         {
  76                 .type = INTEL_DVO_CHIP_LVDS,
  77                 .name = "ch7017",
  78                 .dvo_reg = DVOC,
  79                 .slave_addr = 0x75,
  80                 .gpio = GPIOE,
  81                 .dev_ops = &ch7017_ops,
  82         }
  83 };
  84
  85 static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
  86 {
  87         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
  88         struct intel_output *intel_output = enc_to_intel_output(encoder);
  89         struct intel_dvo_device *dvo = intel_output->dev_priv;
  90         u32 dvo_reg = dvo->dvo_reg;
  91         u32 temp = I915_READ(dvo_reg);
  92
  93         if (mode == DRM_MODE_DPMS_ON) {
  94                 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
  95                 I915_READ(dvo_reg);
  96                 dvo->dev_ops->dpms(dvo, mode);
  97         } else {
  98                 dvo->dev_ops->dpms(dvo, mode);
  99                 I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
 100                 I915_READ(dvo_reg);
 101         }
 102 }
 103
 104 static void intel_dvo_save(struct drm_connector *connector)
 105 {
 106         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 107         struct intel_output *intel_output = to_intel_output(connector);
 108         struct intel_dvo_device *dvo = intel_output->dev_priv;
 109
 110         /* Each output should probably just save the registers it touches,
 111          * but for now, use more overkill.
 112          */
 113         dev_priv->saveDVOA = I915_READ(DVOA);
 114         dev_priv->saveDVOB = I915_READ(DVOB);
 115         dev_priv->saveDVOC = I915_READ(DVOC);
 116
 117         dvo->dev_ops->save(dvo);
 118 }
 119
 120 static void intel_dvo_restore(struct drm_connector *connector)
 121 {
 122         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 123         struct intel_output *intel_output = to_intel_output(connector);
 124         struct intel_dvo_device *dvo = intel_output->dev_priv;
 125
 126         dvo->dev_ops->restore(dvo);
 127
 128         I915_WRITE(DVOA, dev_priv->saveDVOA);
 129         I915_WRITE(DVOB, dev_priv->saveDVOB);
 130         I915_WRITE(DVOC, dev_priv->saveDVOC);
 131 }
 132
 133 static int intel_dvo_mode_valid(struct drm_connector *connector,
 134                                 struct drm_display_mode *mode)
 135 {
 136         struct intel_output *intel_output = to_intel_output(connector);
 137         struct intel_dvo_device *dvo = intel_output->dev_priv;
 138
 139         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 140                 return MODE_NO_DBLESCAN;
 141
 142         /* XXX: Validate clock range */
 143
 144         if (dvo->panel_fixed_mode) {
 145                 if (mode->hdisplay > dvo->panel_fixed_mode->hdisplay)
 146                         return MODE_PANEL;
 147                 if (mode->vdisplay > dvo->panel_fixed_mode->vdisplay)
 148                         return MODE_PANEL;
 149         }
 150
 151         return dvo->dev_ops->mode_valid(dvo, mode);
 152 }
 153
 154 static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
 155                                  struct drm_display_mode *mode,
 156                                  struct drm_display_mode *adjusted_mode)
 157 {
 158         struct intel_output *intel_output = enc_to_intel_output(encoder);
 159         struct intel_dvo_device *dvo = intel_output->dev_priv;
 160
 161         /* If we have timings from the BIOS for the panel, put them in
 162          * to the adjusted mode.  The CRTC will be set up for this mode,
 163          * with the panel scaling set up to source from the H/VDisplay
 164          * of the original mode.
 165          */
 166         if (dvo->panel_fixed_mode != NULL) {
 167 #define C(x) adjusted_mode->x = dvo->panel_fixed_mode->x
 168                 C(hdisplay);
 169                 C(hsync_start);
 170                 C(hsync_end);
 171                 C(htotal);
 172                 C(vdisplay);
 173                 C(vsync_start);
 174                 C(vsync_end);
 175                 C(vtotal);
 176                 C(clock);
 177                 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
 178 #undef C
 179         }
 180
 181         if (dvo->dev_ops->mode_fixup)
 182                 return dvo->dev_ops->mode_fixup(dvo, mode, adjusted_mode);
 183
 184         return true;
 185 }
 186
 187 static void intel_dvo_mode_set(struct drm_encoder *encoder,
 188                                struct drm_display_mode *mode,
 189                                struct drm_display_mode *adjusted_mode)
 190 {
 191         struct drm_device *dev = encoder->dev;
 192         struct drm_i915_private *dev_priv = dev->dev_private;
 193         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 194         struct intel_output *intel_output = enc_to_intel_output(encoder);
 195         struct intel_dvo_device *dvo = intel_output->dev_priv;
 196         int pipe = intel_crtc->pipe;
 197         u32 dvo_val;
 198         u32 dvo_reg = dvo->dvo_reg, dvo_srcdim_reg;
 199         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
 200
 201         switch (dvo_reg) {
 202         case DVOA:
 203         default:
 204                 dvo_srcdim_reg = DVOA_SRCDIM;
 205                 break;
 206         case DVOB:
 207                 dvo_srcdim_reg = DVOB_SRCDIM;
 208                 break;
 209         case DVOC:
 210                 dvo_srcdim_reg = DVOC_SRCDIM;
 211                 break;
 212         }
 213
 214         dvo->dev_ops->mode_set(dvo, mode, adjusted_mode);
 215
 216         /* Save the data order, since I don't know what it should be set to. */
 217         dvo_val = I915_READ(dvo_reg) &
 218                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
 219         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
 220                    DVO_BLANK_ACTIVE_HIGH;
 221
 222         if (pipe == 1)
 223                 dvo_val |= DVO_PIPE_B_SELECT;
 224         dvo_val |= DVO_PIPE_STALL;
 225         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 226                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
 227         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 228                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
 229
 230         I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
 231
 232         /*I915_WRITE(DVOB_SRCDIM,
 233           (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 234           (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
 235         I915_WRITE(dvo_srcdim_reg,
 236                    (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 237                    (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
 238         /*I915_WRITE(DVOB, dvo_val);*/
 239         I915_WRITE(dvo_reg, dvo_val);
 240 }
 241
 242 /**
 243  * Detect the output connection on our DVO device.
 244  *
 245  * Unimplemented.
 246  */
 247 static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector)
 248 {
 249         struct intel_output *intel_output = to_intel_output(connector);
 250         struct intel_dvo_device *dvo = intel_output->dev_priv;
 251
 252         return dvo->dev_ops->detect(dvo);
 253 }
 254
 255 static int intel_dvo_get_modes(struct drm_connector *connector)
 256 {
 257         struct intel_output *intel_output = to_intel_output(connector);
 258         struct intel_dvo_device *dvo = intel_output->dev_priv;
 259
 260         /* We should probably have an i2c driver get_modes function for those
 261          * devices which will have a fixed set of modes determined by the chip
 262          * (TV-out, for example), but for now with just TMDS and LVDS,
 263          * that's not the case.
 264          */
 265         intel_ddc_get_modes(intel_output);
 266         if (!list_empty(&connector->probed_modes))
 267                 return 1;
 268
 269
 270         if (dvo->panel_fixed_mode != NULL) {
 271                 struct drm_display_mode *mode;
 272                 mode = drm_mode_duplicate(connector->dev, dvo->panel_fixed_mode);
 273                 if (mode) {
 274                         drm_mode_probed_add(connector, mode);
 275                         return 1;
 276                 }
 277         }
 278         return 0;
 279 }
 280
 281 static void intel_dvo_destroy (struct drm_connector *connector)
 282 {
 283         struct intel_output *intel_output = to_intel_output(connector);
 284         struct intel_dvo_device *dvo = intel_output->dev_priv;
 285
 286         if (dvo) {
 287                 if (dvo->dev_ops->destroy)
 288                         dvo->dev_ops->destroy(dvo);
 289                 if (dvo->panel_fixed_mode)
 290                         kfree(dvo->panel_fixed_mode);
 291                 /* no need, in i830_dvoices[] now */
 292                 //kfree(dvo);
 293         }
 294         if (intel_output->i2c_bus)
 295                 intel_i2c_destroy(intel_output->i2c_bus);
 296         if (intel_output->ddc_bus)
 297                 intel_i2c_destroy(intel_output->ddc_bus);
 298         drm_sysfs_connector_remove(connector);
 299         drm_connector_cleanup(connector);
 300         kfree(intel_output);
 301 }
 302
 303 #ifdef RANDR_GET_CRTC_INTERFACE
 304 static struct drm_crtc *intel_dvo_get_crtc(struct drm_connector *connector)
 305 {
 306         struct drm_device *dev = connector->dev;
 307         struct drm_i915_private *dev_priv = dev->dev_private;
 308         struct intel_output *intel_output = to_intel_output(connector);
 309         struct intel_dvo_device *dvo = intel_output->dev_priv;
 310         int pipe = !!(I915_READ(dvo->dvo_reg) & SDVO_PIPE_B_SELECT);
 311
 312         return intel_pipe_to_crtc(pScrn, pipe);
 313 }
 314 #endif
 315
 316 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 317         .dpms = intel_dvo_dpms,
 318         .mode_fixup = intel_dvo_mode_fixup,
 319         .prepare = intel_encoder_prepare,
 320         .mode_set = intel_dvo_mode_set,
 321         .commit = intel_encoder_commit,
 322 };
 323
 324 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
 325         .save = intel_dvo_save,
 326         .restore = intel_dvo_restore,
 327         .detect = intel_dvo_detect,
 328         .destroy = intel_dvo_destroy,
 329         .fill_modes = drm_helper_probe_single_connector_modes,
 330 };
 331
 332 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
 333         .mode_valid = intel_dvo_mode_valid,
 334         .get_modes = intel_dvo_get_modes,
 335         .best_encoder = intel_best_encoder,
 336 };
 337
 338 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
 339 {
 340         drm_encoder_cleanup(encoder);
 341 }
 342
 343 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
 344         .destroy = intel_dvo_enc_destroy,
 345 };
 346
 347
 348 /**
 349  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
 350  *
 351  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
 352  * chip being on DVOB/C and having multiple pipes.
 353  */
 354 static struct drm_display_mode *
 355 intel_dvo_get_current_mode (struct drm_connector *connector)
 356 {
 357         struct drm_device *dev = connector->dev;
 358         struct drm_i915_private *dev_priv = dev->dev_private;
 359         struct intel_output *intel_output = to_intel_output(connector);
 360         struct intel_dvo_device *dvo = intel_output->dev_priv;
 361         uint32_t dvo_reg = dvo->dvo_reg;
 362         uint32_t dvo_val = I915_READ(dvo_reg);
 363         struct drm_display_mode *mode = NULL;
 364
 365         /* If the DVO port is active, that'll be the LVDS, so we can pull out
 366          * its timings to get how the BIOS set up the panel.
 367          */
 368         if (dvo_val & DVO_ENABLE) {
 369                 struct drm_crtc *crtc;
 370                 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
 371
 372                 crtc = intel_get_crtc_from_pipe(dev, pipe);
 373                 if (crtc) {
 374                         mode = intel_crtc_mode_get(dev, crtc);
 375
 376                         if (mode) {
 377                                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 378                                 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
 379                                         mode->flags |= DRM_MODE_FLAG_PHSYNC;
 380                                 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
 381                                         mode->flags |= DRM_MODE_FLAG_PVSYNC;
 382                         }
 383                 }
 384         }
 385         return mode;
 386 }
 387
 388 void intel_dvo_init(struct drm_device *dev)
 389 {
 390         struct intel_output *intel_output;
 391         struct intel_dvo_device *dvo;
 392         struct intel_i2c_chan *i2cbus = NULL;
 393         int ret = 0;
 394         int i;
 395         int gpio_inited = 0;
 396         int encoder_type = DRM_MODE_ENCODER_NONE;
 397         intel_output = kzalloc (sizeof(struct intel_output), GFP_KERNEL);
 398         if (!intel_output)
 399                 return;
 400
 401         /* Set up the DDC bus */
 402         intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D");
 403         if (!intel_output->ddc_bus)
 404                 goto free_intel;
 405
 406         /* Now, try to find a controller */
 407         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
 408                 struct drm_connector *connector = &intel_output->base;
 409                 int gpio;
 410
 411                 dvo = &intel_dvo_devices[i];
 412
 413                 /* Allow the I2C driver info to specify the GPIO to be used in
 414                  * special cases, but otherwise default to what's defined
 415                  * in the spec.
 416                  */
 417                 if (dvo->gpio != 0)
 418                         gpio = dvo->gpio;
 419                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
 420                         gpio = GPIOB;
 421                 else
 422                         gpio = GPIOE;
 423
 424                 /* Set up the I2C bus necessary for the chip we're probing.
 425                  * It appears that everything is on GPIOE except for panels
 426                  * on i830 laptops, which are on GPIOB (DVOA).
 427                  */
 428                 if (gpio_inited != gpio) {
 429                         if (i2cbus != NULL)
 430                                 intel_i2c_destroy(i2cbus);
 431                         if (!(i2cbus = intel_i2c_create(dev, gpio,
 432                                 gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) {
 433                                 continue;
 434                         }
 435                         gpio_inited = gpio;
 436                 }
 437
 438                 if (dvo->dev_ops!= NULL)
 439                         ret = dvo->dev_ops->init(dvo, i2cbus);
 440                 else
 441                         ret = false;
 442
 443                 if (!ret)
 444                         continue;
 445
 446                 intel_output->type = INTEL_OUTPUT_DVO;
 447                 switch (dvo->type) {
 448                 case INTEL_DVO_CHIP_TMDS:
 449                         drm_connector_init(dev, connector,
 450                                            &intel_dvo_connector_funcs,
 451                                            DRM_MODE_CONNECTOR_DVII);
 452                         encoder_type = DRM_MODE_ENCODER_TMDS;
 453                         break;
 454                 case INTEL_DVO_CHIP_LVDS:
 455                         drm_connector_init(dev, connector,
 456                                            &intel_dvo_connector_funcs,
 457                                            DRM_MODE_CONNECTOR_LVDS);
 458                         encoder_type = DRM_MODE_ENCODER_LVDS;
 459                         break;
 460                 }
 461
 462                 drm_connector_helper_add(connector,
 463                                          &intel_dvo_connector_helper_funcs);
 464                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 465                 connector->interlace_allowed = false;
 466                 connector->doublescan_allowed = false;
 467
 468                 intel_output->dev_priv = dvo;
 469                 intel_output->i2c_bus = i2cbus;
 470
 471                 drm_encoder_init(dev, &intel_output->enc,
 472                                  &intel_dvo_enc_funcs, encoder_type);
 473                 drm_encoder_helper_add(&intel_output->enc,
 474                                        &intel_dvo_helper_funcs);
 475
 476                 drm_mode_connector_attach_encoder(&intel_output->base,
 477                                                   &intel_output->enc);
 478                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
 479                         /* For our LVDS chipsets, we should hopefully be able
 480                          * to dig the fixed panel mode out of the BIOS data.
 481                          * However, it's in a different format from the BIOS
 482                          * data on chipsets with integrated LVDS (stored in AIM
 483                          * headers, likely), so for now, just get the current
 484                          * mode being output through DVO.
 485                          */
 486                         dvo->panel_fixed_mode =
 487                                 intel_dvo_get_current_mode(connector);
 488                         dvo->panel_wants_dither = true;
 489                 }
 490
 491                 drm_sysfs_connector_add(connector);
 492                 return;
 493         }
 494
 495         intel_i2c_destroy(intel_output->ddc_bus);
 496         /* Didn't find a chip, so tear down. */
 497         if (i2cbus != NULL)
 498                 intel_i2c_destroy(i2cbus);
 499 free_intel:
 500         kfree(intel_output);
 501 }