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