sys/dev/drm2/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
  28 #include <sys/cdefs.h>
  29 __FBSDID("$FreeBSD$");
  30
  31 #include <dev/drm2/drmP.h>
  32 #include <dev/drm2/drm_crtc.h>
  33 #include <dev/drm2/i915/intel_drv.h>
  34 #include <dev/drm2/i915/i915_drm.h>
  35 #include <dev/drm2/i915/i915_drv.h>
  36 #include <dev/drm2/i915/dvo.h>
  37
  38 #define SIL164_ADDR     0x38
  39 #define CH7xxx_ADDR     0x76
  40 #define TFP410_ADDR     0x38
  41 #define NS2501_ADDR     0x38
  42
  43 static const struct intel_dvo_device intel_dvo_devices[] = {
  44         {
  45                 .type = INTEL_DVO_CHIP_TMDS,
  46                 .name = "sil164",
  47                 .dvo_reg = DVOC,
  48                 .slave_addr = SIL164_ADDR,
  49                 .dev_ops = &sil164_ops,
  50         },
  51         {
  52                 .type = INTEL_DVO_CHIP_TMDS,
  53                 .name = "ch7xxx",
  54                 .dvo_reg = DVOC,
  55                 .slave_addr = CH7xxx_ADDR,
  56                 .dev_ops = &ch7xxx_ops,
  57         },
  58         {
  59                 .type = INTEL_DVO_CHIP_LVDS,
  60                 .name = "ivch",
  61                 .dvo_reg = DVOA,
  62                 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
  63                 .dev_ops = &ivch_ops,
  64         },
  65         {
  66                 .type = INTEL_DVO_CHIP_TMDS,
  67                 .name = "tfp410",
  68                 .dvo_reg = DVOC,
  69                 .slave_addr = TFP410_ADDR,
  70                 .dev_ops = &tfp410_ops,
  71         },
  72         {
  73                 .type = INTEL_DVO_CHIP_LVDS,
  74                 .name = "ch7017",
  75                 .dvo_reg = DVOC,
  76                 .slave_addr = 0x75,
  77                 .gpio = GMBUS_PORT_DPB,
  78                 .dev_ops = &ch7017_ops,
  79         },
  80         {
  81                 .type = INTEL_DVO_CHIP_TMDS,
  82                 .name = "ns2501",
  83                 .dvo_reg = DVOC,
  84                 .slave_addr = NS2501_ADDR,
  85                 .dev_ops = &ns2501_ops,
  86        }
  87 };
  88
  89 struct intel_dvo {
  90         struct intel_encoder base;
  91
  92         struct intel_dvo_device dev;
  93
  94         struct drm_display_mode *panel_fixed_mode;
  95         bool panel_wants_dither;
  96 };
  97
  98 static struct intel_dvo *enc_to_intel_dvo(struct drm_encoder *encoder)
  99 {
 100         return container_of(encoder, struct intel_dvo, base.base);
 101 }
 102
 103 static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
 104 {
 105         return container_of(intel_attached_encoder(connector),
 106                             struct intel_dvo, base);
 107 }
 108
 109 static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
 110 {
 111         struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base);
 112
 113         return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
 114 }
 115
 116 static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
 117                                    enum pipe *pipe)
 118 {
 119         struct drm_device *dev = encoder->base.dev;
 120         struct drm_i915_private *dev_priv = dev->dev_private;
 121         struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
 122         u32 tmp;
 123
 124         tmp = I915_READ(intel_dvo->dev.dvo_reg);
 125
 126         if (!(tmp & DVO_ENABLE))
 127                 return false;
 128
 129         *pipe = PORT_TO_PIPE(tmp);
 130
 131         return true;
 132 }
 133
 134 static void intel_disable_dvo(struct intel_encoder *encoder)
 135 {
 136         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 137         struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
 138         u32 dvo_reg = intel_dvo->dev.dvo_reg;
 139         u32 temp = I915_READ(dvo_reg);
 140
 141         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
 142         I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
 143         I915_READ(dvo_reg);
 144 }
 145
 146 static void intel_enable_dvo(struct intel_encoder *encoder)
 147 {
 148         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 149         struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
 150         u32 dvo_reg = intel_dvo->dev.dvo_reg;
 151         u32 temp = I915_READ(dvo_reg);
 152
 153         I915_WRITE(dvo_reg, temp | DVO_ENABLE);
 154         I915_READ(dvo_reg);
 155         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
 156 }
 157
 158 static void intel_dvo_dpms(struct drm_connector *connector, int mode)
 159 {
 160         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
 161         struct drm_crtc *crtc;
 162
 163         /* dvo supports only 2 dpms states. */
 164         if (mode != DRM_MODE_DPMS_ON)
 165                 mode = DRM_MODE_DPMS_OFF;
 166
 167         if (mode == connector->dpms)
 168                 return;
 169
 170         connector->dpms = mode;
 171
 172         /* Only need to change hw state when actually enabled */
 173         crtc = intel_dvo->base.base.crtc;
 174         if (!crtc) {
 175                 intel_dvo->base.connectors_active = false;
 176                 return;
 177         }
 178
 179         if (mode == DRM_MODE_DPMS_ON) {
 180                 intel_dvo->base.connectors_active = true;
 181
 182                 intel_crtc_update_dpms(crtc);
 183
 184                 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
 185         } else {
 186                 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
 187
 188                 intel_dvo->base.connectors_active = false;
 189
 190                 intel_crtc_update_dpms(crtc);
 191         }
 192
 193         intel_modeset_check_state(connector->dev);
 194 }
 195
 196 static int intel_dvo_mode_valid(struct drm_connector *connector,
 197                                 struct drm_display_mode *mode)
 198 {
 199         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
 200
 201         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 202                 return MODE_NO_DBLESCAN;
 203
 204         /* XXX: Validate clock range */
 205
 206         if (intel_dvo->panel_fixed_mode) {
 207                 if (mode->hdisplay > intel_dvo->panel_fixed_mode->hdisplay)
 208                         return MODE_PANEL;
 209                 if (mode->vdisplay > intel_dvo->panel_fixed_mode->vdisplay)
 210                         return MODE_PANEL;
 211         }
 212
 213         return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
 214 }
 215
 216 static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
 217                                  const struct drm_display_mode *mode,
 218                                  struct drm_display_mode *adjusted_mode)
 219 {
 220         struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
 221
 222         /* If we have timings from the BIOS for the panel, put them in
 223          * to the adjusted mode.  The CRTC will be set up for this mode,
 224          * with the panel scaling set up to source from the H/VDisplay
 225          * of the original mode.
 226          */
 227         if (intel_dvo->panel_fixed_mode != NULL) {
 228 #define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
 229                 C(hdisplay);
 230                 C(hsync_start);
 231                 C(hsync_end);
 232                 C(htotal);
 233                 C(vdisplay);
 234                 C(vsync_start);
 235                 C(vsync_end);
 236                 C(vtotal);
 237                 C(clock);
 238 #undef C
 239         }
 240
 241         if (intel_dvo->dev.dev_ops->mode_fixup)
 242                 return intel_dvo->dev.dev_ops->mode_fixup(&intel_dvo->dev, mode, adjusted_mode);
 243
 244         return true;
 245 }
 246
 247 static void intel_dvo_mode_set(struct drm_encoder *encoder,
 248                                struct drm_display_mode *mode,
 249                                struct drm_display_mode *adjusted_mode)
 250 {
 251         struct drm_device *dev = encoder->dev;
 252         struct drm_i915_private *dev_priv = dev->dev_private;
 253         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 254         struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
 255         int pipe = intel_crtc->pipe;
 256         u32 dvo_val;
 257         u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg;
 258         int dpll_reg = DPLL(pipe);
 259
 260         switch (dvo_reg) {
 261         case DVOA:
 262         default:
 263                 dvo_srcdim_reg = DVOA_SRCDIM;
 264                 break;
 265         case DVOB:
 266                 dvo_srcdim_reg = DVOB_SRCDIM;
 267                 break;
 268         case DVOC:
 269                 dvo_srcdim_reg = DVOC_SRCDIM;
 270                 break;
 271         }
 272
 273         intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, mode, adjusted_mode);
 274
 275         /* Save the data order, since I don't know what it should be set to. */
 276         dvo_val = I915_READ(dvo_reg) &
 277                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
 278         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
 279                    DVO_BLANK_ACTIVE_HIGH;
 280
 281         if (pipe == 1)
 282                 dvo_val |= DVO_PIPE_B_SELECT;
 283         dvo_val |= DVO_PIPE_STALL;
 284         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 285                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
 286         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 287                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
 288
 289         I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
 290
 291         /*I915_WRITE(DVOB_SRCDIM,
 292           (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 293           (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
 294         I915_WRITE(dvo_srcdim_reg,
 295                    (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 296                    (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
 297         /*I915_WRITE(DVOB, dvo_val);*/
 298         I915_WRITE(dvo_reg, dvo_val);
 299 }
 300
 301 /**
 302  * Detect the output connection on our DVO device.
 303  *
 304  * Unimplemented.
 305  */
 306 static enum drm_connector_status
 307 intel_dvo_detect(struct drm_connector *connector, bool force)
 308 {
 309         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
 310         return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
 311 }
 312
 313 static int intel_dvo_get_modes(struct drm_connector *connector)
 314 {
 315         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
 316         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 317
 318         /* We should probably have an i2c driver get_modes function for those
 319          * devices which will have a fixed set of modes determined by the chip
 320          * (TV-out, for example), but for now with just TMDS and LVDS,
 321          * that's not the case.
 322          */
 323         intel_ddc_get_modes(connector,
 324                             intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPC));
 325         if (!list_empty(&connector->probed_modes))
 326                 return 1;
 327
 328         if (intel_dvo->panel_fixed_mode != NULL) {
 329                 struct drm_display_mode *mode;
 330                 mode = drm_mode_duplicate(connector->dev, intel_dvo->panel_fixed_mode);
 331                 if (mode) {
 332                         drm_mode_probed_add(connector, mode);
 333                         return 1;
 334                 }
 335         }
 336
 337         return 0;
 338 }
 339
 340 static void intel_dvo_destroy(struct drm_connector *connector)
 341 {
 342         drm_connector_cleanup(connector);
 343         free(connector, DRM_MEM_KMS);
 344 }
 345
 346 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 347         .mode_fixup = intel_dvo_mode_fixup,
 348         .mode_set = intel_dvo_mode_set,
 349         .disable = intel_encoder_noop,
 350 };
 351
 352 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
 353         .dpms = intel_dvo_dpms,
 354         .detect = intel_dvo_detect,
 355         .destroy = intel_dvo_destroy,
 356         .fill_modes = drm_helper_probe_single_connector_modes,
 357 };
 358
 359 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
 360         .mode_valid = intel_dvo_mode_valid,
 361         .get_modes = intel_dvo_get_modes,
 362         .best_encoder = intel_best_encoder,
 363 };
 364
 365 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
 366 {
 367         struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
 368
 369         if (intel_dvo->dev.dev_ops->destroy)
 370                 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
 371
 372         free(intel_dvo->panel_fixed_mode, DRM_MEM_KMS);
 373
 374         intel_encoder_destroy(encoder);
 375 }
 376
 377 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
 378         .destroy = intel_dvo_enc_destroy,
 379 };
 380
 381 /**
 382  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
 383  *
 384  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
 385  * chip being on DVOB/C and having multiple pipes.
 386  */
 387 static struct drm_display_mode *
 388 intel_dvo_get_current_mode(struct drm_connector *connector)
 389 {
 390         struct drm_device *dev = connector->dev;
 391         struct drm_i915_private *dev_priv = dev->dev_private;
 392         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
 393         uint32_t dvo_val = I915_READ(intel_dvo->dev.dvo_reg);
 394         struct drm_display_mode *mode = NULL;
 395
 396         /* If the DVO port is active, that'll be the LVDS, so we can pull out
 397          * its timings to get how the BIOS set up the panel.
 398          */
 399         if (dvo_val & DVO_ENABLE) {
 400                 struct drm_crtc *crtc;
 401                 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
 402
 403                 crtc = intel_get_crtc_for_pipe(dev, pipe);
 404                 if (crtc) {
 405                         mode = intel_crtc_mode_get(dev, crtc);
 406                         if (mode) {
 407                                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 408                                 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
 409                                         mode->flags |= DRM_MODE_FLAG_PHSYNC;
 410                                 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
 411                                         mode->flags |= DRM_MODE_FLAG_PVSYNC;
 412                         }
 413                 }
 414         }
 415
 416         return mode;
 417 }
 418
 419 void intel_dvo_init(struct drm_device *dev)
 420 {
 421         struct drm_i915_private *dev_priv = dev->dev_private;
 422         struct intel_encoder *intel_encoder;
 423         struct intel_dvo *intel_dvo;
 424         struct intel_connector *intel_connector;
 425         int i;
 426         int encoder_type = DRM_MODE_ENCODER_NONE;
 427
 428         intel_dvo = malloc(sizeof(struct intel_dvo), DRM_MEM_KMS, M_WAITOK | M_ZERO);
 429         if (!intel_dvo)
 430                 return;
 431
 432         intel_connector = malloc(sizeof(struct intel_connector), DRM_MEM_KMS, M_WAITOK | M_ZERO);
 433         if (!intel_connector) {
 434                 free(intel_dvo, DRM_MEM_KMS);
 435                 return;
 436         }
 437
 438         intel_encoder = &intel_dvo->base;
 439         drm_encoder_init(dev, &intel_encoder->base,
 440                          &intel_dvo_enc_funcs, encoder_type);
 441
 442         intel_encoder->disable = intel_disable_dvo;
 443         intel_encoder->enable = intel_enable_dvo;
 444         intel_encoder->get_hw_state = intel_dvo_get_hw_state;
 445         intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
 446
 447         /* Now, try to find a controller */
 448         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
 449                 struct drm_connector *connector = &intel_connector->base;
 450                 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
 451                 device_t i2c;
 452                 int gpio;
 453                 bool dvoinit;
 454
 455                 /* Allow the I2C driver info to specify the GPIO to be used in
 456                  * special cases, but otherwise default to what's defined
 457                  * in the spec.
 458                  */
 459                 if (intel_gmbus_is_port_valid(dvo->gpio))
 460                         gpio = dvo->gpio;
 461                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
 462                         gpio = GMBUS_PORT_SSC;
 463                 else
 464                         gpio = GMBUS_PORT_DPB;
 465
 466                 /* Set up the I2C bus necessary for the chip we're probing.
 467                  * It appears that everything is on GPIOE except for panels
 468                  * on i830 laptops, which are on GPIOB (DVOA).
 469                  */
 470                 i2c = intel_gmbus_get_adapter(dev_priv, gpio);
 471
 472                 intel_dvo->dev = *dvo;
 473
 474                 /* GMBUS NAK handling seems to be unstable, hence let the
 475                  * transmitter detection run in bit banging mode for now.
 476                  */
 477                 intel_gmbus_force_bit(i2c, true);
 478
 479                 dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c);
 480
 481                 intel_gmbus_force_bit(i2c, false);
 482
 483                 if (!dvoinit)
 484                         continue;
 485
 486                 intel_encoder->type = INTEL_OUTPUT_DVO;
 487                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 488                 switch (dvo->type) {
 489                 case INTEL_DVO_CHIP_TMDS:
 490                         intel_encoder->cloneable = true;
 491                         drm_connector_init(dev, connector,
 492                                            &intel_dvo_connector_funcs,
 493                                            DRM_MODE_CONNECTOR_DVII);
 494                         encoder_type = DRM_MODE_ENCODER_TMDS;
 495                         break;
 496                 case INTEL_DVO_CHIP_LVDS:
 497                         intel_encoder->cloneable = false;
 498                         drm_connector_init(dev, connector,
 499                                            &intel_dvo_connector_funcs,
 500                                            DRM_MODE_CONNECTOR_LVDS);
 501                         encoder_type = DRM_MODE_ENCODER_LVDS;
 502                         break;
 503                 }
 504
 505                 drm_connector_helper_add(connector,
 506                                          &intel_dvo_connector_helper_funcs);
 507                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 508                 connector->interlace_allowed = false;
 509                 connector->doublescan_allowed = false;
 510
 511                 drm_encoder_helper_add(&intel_encoder->base,
 512                                        &intel_dvo_helper_funcs);
 513
 514                 intel_connector_attach_encoder(intel_connector, intel_encoder);
 515                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
 516                         /* For our LVDS chipsets, we should hopefully be able
 517                          * to dig the fixed panel mode out of the BIOS data.
 518                          * However, it's in a different format from the BIOS
 519                          * data on chipsets with integrated LVDS (stored in AIM
 520                          * headers, likely), so for now, just get the current
 521                          * mode being output through DVO.
 522                          */
 523                         intel_dvo->panel_fixed_mode =
 524                                 intel_dvo_get_current_mode(connector);
 525                         intel_dvo->panel_wants_dither = true;
 526                 }
 527
 528                 return;
 529         }
 530
 531         drm_encoder_cleanup(&intel_encoder->base);
 532         free(intel_dvo, DRM_MEM_KMS);
 533         free(intel_connector, DRM_MEM_KMS);
 534 }