linux-core/intel_dvo.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Eric Anholt <eric@anholt.net>
  25  */
  26 /*
  27  * Copyright 2006 Dave Airlie <airlied@linux.ie>
  28  */
  29
  30 #include <linux/i2c.h>
  31 #include "drmP.h"
  32 #include "drm.h"
  33 #include "drm_crtc.h"
  34 #include "intel_drv.h"
  35 #include "i915_drm.h"
  36 #include "i915_drv.h"
  37 #include "dvo.h"
  38
  39 #define SIL164_ADDR     0x38
  40 #define CH7xxx_ADDR     0x76
  41 #define TFP410_ADDR     0x38
  42
  43 extern struct intel_dvo_dev_ops sil164_ops;
  44 extern struct intel_dvo_dev_ops ch7xxx_ops;
  45 extern struct intel_dvo_dev_ops ivch_ops;
  46 extern struct intel_dvo_dev_ops tfp410_ops;
  47 extern struct intel_dvo_dev_ops ch7017_ops;
  48
  49 struct intel_dvo_device intel_dvo_devices[] = {
  50         {
  51                 .type = INTEL_DVO_CHIP_TMDS,
  52                 .name = "sil164",
  53                 .dvo_reg = DVOC,
  54                 .slave_addr = SIL164_ADDR,
  55                 .dev_ops = &sil164_ops,
  56         },
  57         {
  58                 .type = INTEL_DVO_CHIP_TMDS,
  59                 .name = "ch7xxx",
  60                 .dvo_reg = DVOC,
  61                 .slave_addr = CH7xxx_ADDR,
  62                 .dev_ops = &ch7xxx_ops,
  63         },
  64         {
  65                 .type = INTEL_DVO_CHIP_LVDS,
  66                 .name = "ivch",
  67                 .dvo_reg = DVOA,
  68                 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
  69                 .dev_ops = &ivch_ops,
  70         },
  71         {
  72                 .type = INTEL_DVO_CHIP_TMDS,
  73                 .name = "tfp410",
  74                 .dvo_reg = DVOC,
  75                 .slave_addr = TFP410_ADDR,
  76                 .dev_ops = &tfp410_ops,
  77         },
  78         {
  79                 .type = INTEL_DVO_CHIP_LVDS,
  80                 .name = "ch7017",
  81                 .dvo_reg = DVOC,
  82                 .slave_addr = 0x75,
  83                 .gpio = GPIOE,
  84                 .dev_ops = &ch7017_ops,
  85         }
  86 };
  87
  88 static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
  89 {
  90         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
  91         struct intel_output *intel_output = enc_to_intel_output(encoder);
  92         struct intel_dvo_device *dvo = intel_output->dev_priv;
  93         u32 dvo_reg = dvo->dvo_reg;
  94         u32 temp = I915_READ(dvo_reg);
  95
  96         if (mode == DPMSModeOn) {
  97                 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
  98                 I915_READ(dvo_reg);
  99                 dvo->dev_ops->dpms(dvo, mode);
 100         } else {
 101                 dvo->dev_ops->dpms(dvo, mode);
 102                 I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
 103                 I915_READ(dvo_reg);
 104         }
 105 }
 106
 107 static void intel_dvo_save(struct drm_connector *connector)
 108 {
 109         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 110         struct intel_output *intel_output = to_intel_output(connector);
 111         struct intel_dvo_device *dvo = intel_output->dev_priv;
 112
 113         /* Each output should probably just save the registers it touches,
 114          * but for now, use more overkill.
 115          */
 116         dev_priv->saveDVOA = I915_READ(DVOA);
 117         dev_priv->saveDVOB = I915_READ(DVOB);
 118         dev_priv->saveDVOC = I915_READ(DVOC);
 119
 120         dvo->dev_ops->save(dvo);
 121 }
 122
 123 static void intel_dvo_restore(struct drm_connector *connector)
 124 {
 125         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 126         struct intel_output *intel_output = to_intel_output(connector);
 127         struct intel_dvo_device *dvo = intel_output->dev_priv;
 128
 129         dvo->dev_ops->restore(dvo);
 130
 131         I915_WRITE(DVOA, dev_priv->saveDVOA);
 132         I915_WRITE(DVOB, dev_priv->saveDVOB);
 133         I915_WRITE(DVOC, dev_priv->saveDVOC);
 134 }
 135
 136 static int intel_dvo_mode_valid(struct drm_connector *connector,
 137                                 struct drm_display_mode *mode)
 138 {
 139         struct intel_output *intel_output = to_intel_output(connector);
 140         struct intel_dvo_device *dvo = intel_output->dev_priv;
 141
 142         if (mode->flags & V_DBLSCAN)
 143                 return MODE_NO_DBLESCAN;
 144
 145         /* XXX: Validate clock range */
 146
 147         if (dvo->panel_fixed_mode) {
 148                 if (mode->hdisplay > dvo->panel_fixed_mode->hdisplay)
 149                         return MODE_PANEL;
 150                 if (mode->vdisplay > dvo->panel_fixed_mode->vdisplay)
 151                         return MODE_PANEL;
 152         }
 153
 154         return dvo->dev_ops->mode_valid(dvo, mode);
 155 }
 156
 157 static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
 158                                  struct drm_display_mode *mode,
 159                                  struct drm_display_mode *adjusted_mode)
 160 {
 161         struct intel_output *intel_output = enc_to_intel_output(encoder);
 162         struct intel_dvo_device *dvo = intel_output->dev_priv;
 163
 164         /* If we have timings from the BIOS for the panel, put them in
 165          * to the adjusted mode.  The CRTC will be set up for this mode,
 166          * with the panel scaling set up to source from the H/VDisplay
 167          * of the original mode.
 168          */
 169         if (dvo->panel_fixed_mode != NULL) {
 170 #define C(x) adjusted_mode->x = dvo->panel_fixed_mode->x
 171                 C(hdisplay);
 172                 C(hsync_start);
 173                 C(hsync_end);
 174                 C(htotal);
 175                 C(vdisplay);
 176                 C(vsync_start);
 177                 C(vsync_end);
 178                 C(vtotal);
 179                 C(clock);
 180                 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
 181 #undef C
 182         }
 183
 184         if (dvo->dev_ops->mode_fixup)
 185                 return dvo->dev_ops->mode_fixup(dvo, mode, adjusted_mode);
 186
 187         return true;
 188 }
 189
 190 static void intel_dvo_mode_set(struct drm_encoder *encoder,
 191                                struct drm_display_mode *mode,
 192                                struct drm_display_mode *adjusted_mode)
 193 {
 194         struct drm_device *dev = encoder->dev;
 195         struct drm_i915_private *dev_priv = dev->dev_private;
 196         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 197         struct intel_output *intel_output = enc_to_intel_output(encoder);
 198         struct intel_dvo_device *dvo = intel_output->dev_priv;
 199         int pipe = intel_crtc->pipe;
 200         u32 dvo_val;
 201         u32 dvo_reg = dvo->dvo_reg, dvo_srcdim_reg;
 202         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
 203
 204         switch (dvo_reg) {
 205         case DVOA:
 206         default:
 207                 dvo_srcdim_reg = DVOA_SRCDIM;
 208                 break;
 209         case DVOB:
 210                 dvo_srcdim_reg = DVOB_SRCDIM;
 211                 break;
 212         case DVOC:
 213                 dvo_srcdim_reg = DVOC_SRCDIM;
 214                 break;
 215         }
 216
 217         dvo->dev_ops->mode_set(dvo, mode, adjusted_mode);
 218
 219         /* Save the data order, since I don't know what it should be set to. */
 220         dvo_val = I915_READ(dvo_reg) &
 221                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
 222         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
 223                    DVO_BLANK_ACTIVE_HIGH;
 224
 225         if (pipe == 1)
 226                 dvo_val |= DVO_PIPE_B_SELECT;
 227         dvo_val |= DVO_PIPE_STALL;
 228         if (adjusted_mode->flags & V_PHSYNC)
 229                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
 230         if (adjusted_mode->flags & V_PVSYNC)
 231                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
 232
 233         I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
 234
 235         /*I915_WRITE(DVOB_SRCDIM,
 236           (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 237           (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
 238         I915_WRITE(dvo_srcdim_reg,
 239                    (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 240                    (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
 241         /*I915_WRITE(DVOB, dvo_val);*/
 242         I915_WRITE(dvo_reg, dvo_val);
 243 }
 244
 245 /**
 246  * Detect the output connection on our DVO device.
 247  *
 248  * Unimplemented.
 249  */
 250 static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector)
 251 {
 252         struct intel_output *intel_output = to_intel_output(connector);
 253         struct intel_dvo_device *dvo = intel_output->dev_priv;
 254
 255         return dvo->dev_ops->detect(dvo);
 256 }
 257
 258 static int intel_dvo_get_modes(struct drm_connector *connector)
 259 {
 260         struct intel_output *intel_output = to_intel_output(connector);
 261         struct intel_dvo_device *dvo = intel_output->dev_priv;
 262
 263         /* We should probably have an i2c driver get_modes function for those
 264          * devices which will have a fixed set of modes determined by the chip
 265          * (TV-out, for example), but for now with just TMDS and LVDS,
 266          * that's not the case.
 267          */
 268         intel_ddc_get_modes(intel_output);
 269         if (!list_empty(&connector->probed_modes))
 270                 return 1;
 271
 272 #if 0
 273         if (intel_output->i2c_drv->vid_rec->get_modes)
 274         {
 275                 modes = intel_output->i2c_drv->vid_rec->get_modes (intel_output->i2c_drv->dev_priv);
 276                 if (modes != NULL)
 277                         return modes;
 278         }
 279 #endif
 280
 281         if (dvo->panel_fixed_mode != NULL) {
 282                 struct drm_display_mode *mode;
 283                 mode = drm_mode_duplicate(connector->dev, dvo->panel_fixed_mode);
 284                 if (mode) {
 285                         drm_mode_probed_add(connector, mode);
 286                         return 1;
 287                 }
 288         }
 289         return 0;
 290 }
 291
 292 static void intel_dvo_destroy (struct drm_connector *connector)
 293 {
 294         struct intel_output *intel_output = to_intel_output(connector);
 295         struct intel_dvo_device *dvo = intel_output->dev_priv;
 296
 297         if (dvo) {
 298                 if (dvo->dev_ops->destroy)
 299                         dvo->dev_ops->destroy(dvo);
 300                 if (dvo->panel_fixed_mode)
 301                         kfree(dvo->panel_fixed_mode);
 302                 /* no need, in i830_dvoices[] now */
 303                 //kfree(dvo);
 304         }
 305         if (intel_output->i2c_bus)
 306                 intel_i2c_destroy(intel_output->i2c_bus);
 307         if (intel_output->ddc_bus)
 308                 intel_i2c_destroy(intel_output->ddc_bus);
 309         drm_sysfs_connector_remove(connector);
 310         drm_connector_cleanup(connector);
 311         kfree(intel_output);
 312 }
 313
 314 #ifdef RANDR_GET_CRTC_INTERFACE
 315 static struct drm_crtc *intel_dvo_get_crtc(struct drm_connector *connector)
 316 {
 317         struct drm_device *dev = connector->dev;
 318         struct drm_i915_private *dev_priv = dev->dev_private;
 319         struct intel_output *intel_output = to_intel_output(connector);
 320         struct intel_dvo_device *dvo = intel_output->dev_priv;
 321         int pipe = !!(I915_READ(dvo->dvo_reg) & SDVO_PIPE_B_SELECT);
 322
 323         return intel_pipe_to_crtc(pScrn, pipe);
 324 }
 325 #endif
 326
 327 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 328         .dpms = intel_dvo_dpms,
 329         .mode_fixup = intel_dvo_mode_fixup,
 330         .prepare = intel_encoder_prepare,
 331         .mode_set = intel_dvo_mode_set,
 332         .commit = intel_encoder_commit,
 333 };
 334
 335 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
 336         .save = intel_dvo_save,
 337         .restore = intel_dvo_restore,
 338         .detect = intel_dvo_detect,
 339         .destroy = intel_dvo_destroy,
 340         .fill_modes = drm_helper_probe_single_connector_modes,
 341 };
 342
 343 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
 344         .mode_valid = intel_dvo_mode_valid,
 345         .get_modes = intel_dvo_get_modes,
 346         .best_encoder = intel_best_encoder,
 347 };
 348
 349 void intel_dvo_enc_destroy(struct drm_encoder *encoder)
 350 {
 351         drm_encoder_cleanup(encoder);
 352 }
 353
 354 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
 355         .destroy = intel_dvo_enc_destroy,
 356 };
 357
 358
 359 /**
 360  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
 361  *
 362  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
 363  * chip being on DVOB/C and having multiple pipes.
 364  */
 365 static struct drm_display_mode *
 366 intel_dvo_get_current_mode (struct drm_connector *connector)
 367 {
 368         struct drm_device *dev = connector->dev;
 369         struct drm_i915_private *dev_priv = dev->dev_private;
 370         struct intel_output *intel_output = to_intel_output(connector);
 371         struct intel_dvo_device *dvo = intel_output->dev_priv;
 372         uint32_t dvo_reg = dvo->dvo_reg;
 373         uint32_t dvo_val = I915_READ(dvo_reg);
 374         struct drm_display_mode *mode = NULL;
 375
 376         /* If the DVO port is active, that'll be the LVDS, so we can pull out
 377          * its timings to get how the BIOS set up the panel.
 378          */
 379         if (dvo_val & DVO_ENABLE) {
 380                 struct drm_crtc *crtc;
 381                 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
 382
 383                 crtc = intel_get_crtc_from_pipe(dev, pipe);
 384                 if (crtc) {
 385                         mode = intel_crtc_mode_get(dev, crtc);
 386
 387                         if (mode) {
 388                                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 389                                 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
 390                                         mode->flags |= V_PHSYNC;
 391                                 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
 392                                         mode->flags |= V_PVSYNC;
 393                         }
 394                 }
 395         }
 396         return mode;
 397 }
 398
 399 void intel_dvo_init(struct drm_device *dev)
 400 {
 401         struct intel_output *intel_output;
 402         struct intel_dvo_device *dvo;
 403         struct intel_i2c_chan *i2cbus = NULL;
 404         int ret = 0;
 405         int i;
 406         int gpio_inited = 0;
 407         int encoder_type = DRM_MODE_ENCODER_NONE;
 408         intel_output = kzalloc (sizeof(struct intel_output), GFP_KERNEL);
 409         if (!intel_output)
 410                 return;
 411
 412         /* Set up the DDC bus */
 413         intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D");
 414         if (!intel_output->ddc_bus)
 415                 goto free_intel;
 416
 417         /* Now, try to find a controller */
 418         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
 419                 struct drm_connector *connector = &intel_output->base;
 420                 int gpio;
 421
 422                 dvo = &intel_dvo_devices[i];
 423
 424                 /* Allow the I2C driver info to specify the GPIO to be used in
 425                  * special cases, but otherwise default to what's defined
 426                  * in the spec.
 427                  */
 428                 if (dvo->gpio != 0)
 429                         gpio = dvo->gpio;
 430                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
 431                         gpio = GPIOB;
 432                 else
 433                         gpio = GPIOE;
 434
 435                 /* Set up the I2C bus necessary for the chip we're probing.
 436                  * It appears that everything is on GPIOE except for panels
 437                  * on i830 laptops, which are on GPIOB (DVOA).
 438                  */
 439                 if (gpio_inited != gpio) {
 440                         if (i2cbus != NULL)
 441                                 intel_i2c_destroy(i2cbus);
 442                         if (!(i2cbus = intel_i2c_create(dev, gpio,
 443                                 gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) {
 444                                 continue;
 445                         }
 446                         gpio_inited = gpio;
 447                 }
 448
 449                 if (dvo->dev_ops!= NULL)
 450                         ret = dvo->dev_ops->init(dvo, i2cbus);
 451                 else
 452                         ret = false;
 453
 454                 if (!ret)
 455                         continue;
 456
 457                 intel_output->type = INTEL_OUTPUT_DVO;
 458                 switch (dvo->type) {
 459                 case INTEL_DVO_CHIP_TMDS:
 460                   //                    connector = DRM_MODE_CONNECTOR_DVID;
 461                         drm_connector_init(dev, connector, &intel_dvo_connector_funcs,
 462                                            DRM_MODE_CONNECTOR_DVII);
 463                         encoder_type = DRM_MODE_ENCODER_TMDS;
 464                         break;
 465                 case INTEL_DVO_CHIP_LVDS:
 466                   //                    connector = DRM_MODE_CONNECTOR_LVDS;
 467                         drm_connector_init(dev, connector, &intel_dvo_connector_funcs,
 468                                            DRM_MODE_CONNECTOR_LVDS);
 469                         encoder_type = DRM_MODE_ENCODER_LVDS;
 470                         break;
 471                 }
 472
 473                 drm_connector_helper_add(connector, &intel_dvo_connector_helper_funcs);
 474                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 475                 connector->interlace_allowed = false;
 476                 connector->doublescan_allowed = false;
 477
 478                 intel_output->dev_priv = dvo;
 479                 intel_output->i2c_bus = i2cbus;
 480
 481                 drm_encoder_init(dev, &intel_output->enc, &intel_dvo_enc_funcs, encoder_type);
 482                 drm_encoder_helper_add(&intel_output->enc, &intel_dvo_helper_funcs);
 483
 484                 drm_mode_connector_attach_encoder(&intel_output->base, &intel_output->enc);
 485                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
 486                         /* For our LVDS chipsets, we should hopefully be able
 487                          * to dig the fixed panel mode out of the BIOS data.
 488                          * However, it's in a different format from the BIOS
 489                          * data on chipsets with integrated LVDS (stored in AIM
 490                          * headers, likely), so for now, just get the current
 491                          * mode being output through DVO.
 492                          */
 493                         dvo->panel_fixed_mode = intel_dvo_get_current_mode(connector);
 494                         dvo->panel_wants_dither = true;
 495                 }
 496
 497                 drm_sysfs_connector_add(connector);
 498                 return;
 499         }
 500
 501         intel_i2c_destroy(intel_output->ddc_bus);
 502         /* Didn't find a chip, so tear down. */
 503         if (i2cbus != NULL)
 504                 intel_i2c_destroy(i2cbus);
 505 free_intel:
 506         kfree(intel_output);
 507 }