SAFE public projects git trees. - safe/jmp/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 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_encoder *intel_encoder = enc_to_intel_encoder(encoder);
  83         struct intel_dvo_device *dvo = intel_encoder->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 int intel_dvo_mode_valid(struct drm_connector *connector,
  99                                 struct drm_display_mode *mode)
 100 {
 101         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 102         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 103
 104         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 105                 return MODE_NO_DBLESCAN;
 106
 107         /* XXX: Validate clock range */
 108
 109         if (dvo->panel_fixed_mode) {
 110                 if (mode->hdisplay > dvo->panel_fixed_mode->hdisplay)
 111                         return MODE_PANEL;
 112                 if (mode->vdisplay > dvo->panel_fixed_mode->vdisplay)
 113                         return MODE_PANEL;
 114         }
 115
 116         return dvo->dev_ops->mode_valid(dvo, mode);
 117 }
 118
 119 static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
 120                                  struct drm_display_mode *mode,
 121                                  struct drm_display_mode *adjusted_mode)
 122 {
 123         struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
 124         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 125
 126         /* If we have timings from the BIOS for the panel, put them in
 127          * to the adjusted mode.  The CRTC will be set up for this mode,
 128          * with the panel scaling set up to source from the H/VDisplay
 129          * of the original mode.
 130          */
 131         if (dvo->panel_fixed_mode != NULL) {
 132 #define C(x) adjusted_mode->x = dvo->panel_fixed_mode->x
 133                 C(hdisplay);
 134                 C(hsync_start);
 135                 C(hsync_end);
 136                 C(htotal);
 137                 C(vdisplay);
 138                 C(vsync_start);
 139                 C(vsync_end);
 140                 C(vtotal);
 141                 C(clock);
 142                 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
 143 #undef C
 144         }
 145
 146         if (dvo->dev_ops->mode_fixup)
 147                 return dvo->dev_ops->mode_fixup(dvo, mode, adjusted_mode);
 148
 149         return true;
 150 }
 151
 152 static void intel_dvo_mode_set(struct drm_encoder *encoder,
 153                                struct drm_display_mode *mode,
 154                                struct drm_display_mode *adjusted_mode)
 155 {
 156         struct drm_device *dev = encoder->dev;
 157         struct drm_i915_private *dev_priv = dev->dev_private;
 158         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 159         struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
 160         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 161         int pipe = intel_crtc->pipe;
 162         u32 dvo_val;
 163         u32 dvo_reg = dvo->dvo_reg, dvo_srcdim_reg;
 164         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
 165
 166         switch (dvo_reg) {
 167         case DVOA:
 168         default:
 169                 dvo_srcdim_reg = DVOA_SRCDIM;
 170                 break;
 171         case DVOB:
 172                 dvo_srcdim_reg = DVOB_SRCDIM;
 173                 break;
 174         case DVOC:
 175                 dvo_srcdim_reg = DVOC_SRCDIM;
 176                 break;
 177         }
 178
 179         dvo->dev_ops->mode_set(dvo, mode, adjusted_mode);
 180
 181         /* Save the data order, since I don't know what it should be set to. */
 182         dvo_val = I915_READ(dvo_reg) &
 183                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
 184         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
 185                    DVO_BLANK_ACTIVE_HIGH;
 186
 187         if (pipe == 1)
 188                 dvo_val |= DVO_PIPE_B_SELECT;
 189         dvo_val |= DVO_PIPE_STALL;
 190         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 191                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
 192         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 193                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
 194
 195         I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
 196
 197         /*I915_WRITE(DVOB_SRCDIM,
 198           (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 199           (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
 200         I915_WRITE(dvo_srcdim_reg,
 201                    (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
 202                    (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
 203         /*I915_WRITE(DVOB, dvo_val);*/
 204         I915_WRITE(dvo_reg, dvo_val);
 205 }
 206
 207 /**
 208  * Detect the output connection on our DVO device.
 209  *
 210  * Unimplemented.
 211  */
 212 static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector)
 213 {
 214         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 215         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 216
 217         return dvo->dev_ops->detect(dvo);
 218 }
 219
 220 static int intel_dvo_get_modes(struct drm_connector *connector)
 221 {
 222         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 223         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 224
 225         /* We should probably have an i2c driver get_modes function for those
 226          * devices which will have a fixed set of modes determined by the chip
 227          * (TV-out, for example), but for now with just TMDS and LVDS,
 228          * that's not the case.
 229          */
 230         intel_ddc_get_modes(connector, intel_encoder->ddc_bus);
 231         if (!list_empty(&connector->probed_modes))
 232                 return 1;
 233
 234
 235         if (dvo->panel_fixed_mode != NULL) {
 236                 struct drm_display_mode *mode;
 237                 mode = drm_mode_duplicate(connector->dev, dvo->panel_fixed_mode);
 238                 if (mode) {
 239                         drm_mode_probed_add(connector, mode);
 240                         return 1;
 241                 }
 242         }
 243         return 0;
 244 }
 245
 246 static void intel_dvo_destroy (struct drm_connector *connector)
 247 {
 248         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 249         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 250
 251         if (dvo) {
 252                 if (dvo->dev_ops->destroy)
 253                         dvo->dev_ops->destroy(dvo);
 254                 if (dvo->panel_fixed_mode)
 255                         kfree(dvo->panel_fixed_mode);
 256                 /* no need, in i830_dvoices[] now */
 257                 //kfree(dvo);
 258         }
 259         if (intel_encoder->i2c_bus)
 260                 intel_i2c_destroy(intel_encoder->i2c_bus);
 261         if (intel_encoder->ddc_bus)
 262                 intel_i2c_destroy(intel_encoder->ddc_bus);
 263         drm_sysfs_connector_remove(connector);
 264         drm_connector_cleanup(connector);
 265         kfree(intel_encoder);
 266 }
 267
 268 #ifdef RANDR_GET_CRTC_INTERFACE
 269 static struct drm_crtc *intel_dvo_get_crtc(struct drm_connector *connector)
 270 {
 271         struct drm_device *dev = connector->dev;
 272         struct drm_i915_private *dev_priv = dev->dev_private;
 273         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 274         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 275         int pipe = !!(I915_READ(dvo->dvo_reg) & SDVO_PIPE_B_SELECT);
 276
 277         return intel_pipe_to_crtc(pScrn, pipe);
 278 }
 279 #endif
 280
 281 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
 282         .dpms = intel_dvo_dpms,
 283         .mode_fixup = intel_dvo_mode_fixup,
 284         .prepare = intel_encoder_prepare,
 285         .mode_set = intel_dvo_mode_set,
 286         .commit = intel_encoder_commit,
 287 };
 288
 289 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
 290         .dpms = drm_helper_connector_dpms,
 291         .detect = intel_dvo_detect,
 292         .destroy = intel_dvo_destroy,
 293         .fill_modes = drm_helper_probe_single_connector_modes,
 294 };
 295
 296 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
 297         .mode_valid = intel_dvo_mode_valid,
 298         .get_modes = intel_dvo_get_modes,
 299         .best_encoder = intel_best_encoder,
 300 };
 301
 302 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
 303 {
 304         drm_encoder_cleanup(encoder);
 305 }
 306
 307 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
 308         .destroy = intel_dvo_enc_destroy,
 309 };
 310
 311
 312 /**
 313  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
 314  *
 315  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
 316  * chip being on DVOB/C and having multiple pipes.
 317  */
 318 static struct drm_display_mode *
 319 intel_dvo_get_current_mode (struct drm_connector *connector)
 320 {
 321         struct drm_device *dev = connector->dev;
 322         struct drm_i915_private *dev_priv = dev->dev_private;
 323         struct intel_encoder *intel_encoder = to_intel_encoder(connector);
 324         struct intel_dvo_device *dvo = intel_encoder->dev_priv;
 325         uint32_t dvo_reg = dvo->dvo_reg;
 326         uint32_t dvo_val = I915_READ(dvo_reg);
 327         struct drm_display_mode *mode = NULL;
 328
 329         /* If the DVO port is active, that'll be the LVDS, so we can pull out
 330          * its timings to get how the BIOS set up the panel.
 331          */
 332         if (dvo_val & DVO_ENABLE) {
 333                 struct drm_crtc *crtc;
 334                 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
 335
 336                 crtc = intel_get_crtc_from_pipe(dev, pipe);
 337                 if (crtc) {
 338                         mode = intel_crtc_mode_get(dev, crtc);
 339
 340                         if (mode) {
 341                                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 342                                 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
 343                                         mode->flags |= DRM_MODE_FLAG_PHSYNC;
 344                                 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
 345                                         mode->flags |= DRM_MODE_FLAG_PVSYNC;
 346                         }
 347                 }
 348         }
 349         return mode;
 350 }
 351
 352 void intel_dvo_init(struct drm_device *dev)
 353 {
 354         struct intel_encoder *intel_encoder;
 355         struct intel_dvo_device *dvo;
 356         struct i2c_adapter *i2cbus = NULL;
 357         int ret = 0;
 358         int i;
 359         int encoder_type = DRM_MODE_ENCODER_NONE;
 360         intel_encoder = kzalloc (sizeof(struct intel_encoder), GFP_KERNEL);
 361         if (!intel_encoder)
 362                 return;
 363
 364         /* Set up the DDC bus */
 365         intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D");
 366         if (!intel_encoder->ddc_bus)
 367                 goto free_intel;
 368
 369         /* Now, try to find a controller */
 370         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
 371                 struct drm_connector *connector = &intel_encoder->base;
 372                 int gpio;
 373
 374                 dvo = &intel_dvo_devices[i];
 375
 376                 /* Allow the I2C driver info to specify the GPIO to be used in
 377                  * special cases, but otherwise default to what's defined
 378                  * in the spec.
 379                  */
 380                 if (dvo->gpio != 0)
 381                         gpio = dvo->gpio;
 382                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
 383                         gpio = GPIOB;
 384                 else
 385                         gpio = GPIOE;
 386
 387                 /* Set up the I2C bus necessary for the chip we're probing.
 388                  * It appears that everything is on GPIOE except for panels
 389                  * on i830 laptops, which are on GPIOB (DVOA).
 390                  */
 391                 if (i2cbus != NULL)
 392                         intel_i2c_destroy(i2cbus);
 393                 if (!(i2cbus = intel_i2c_create(dev, gpio,
 394                         gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) {
 395                         continue;
 396                 }
 397
 398                 if (dvo->dev_ops!= NULL)
 399                         ret = dvo->dev_ops->init(dvo, i2cbus);
 400                 else
 401                         ret = false;
 402
 403                 if (!ret)
 404                         continue;
 405
 406                 intel_encoder->type = INTEL_OUTPUT_DVO;
 407                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 408                 switch (dvo->type) {
 409                 case INTEL_DVO_CHIP_TMDS:
 410                         intel_encoder->clone_mask =
 411                                 (1 << INTEL_DVO_TMDS_CLONE_BIT) |
 412                                 (1 << INTEL_ANALOG_CLONE_BIT);
 413                         drm_connector_init(dev, connector,
 414                                            &intel_dvo_connector_funcs,
 415                                            DRM_MODE_CONNECTOR_DVII);
 416                         encoder_type = DRM_MODE_ENCODER_TMDS;
 417                         break;
 418                 case INTEL_DVO_CHIP_LVDS:
 419                         intel_encoder->clone_mask =
 420                                 (1 << INTEL_DVO_LVDS_CLONE_BIT);
 421                         drm_connector_init(dev, connector,
 422                                            &intel_dvo_connector_funcs,
 423                                            DRM_MODE_CONNECTOR_LVDS);
 424                         encoder_type = DRM_MODE_ENCODER_LVDS;
 425                         break;
 426                 }
 427
 428                 drm_connector_helper_add(connector,
 429                                          &intel_dvo_connector_helper_funcs);
 430                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 431                 connector->interlace_allowed = false;
 432                 connector->doublescan_allowed = false;
 433
 434                 intel_encoder->dev_priv = dvo;
 435                 intel_encoder->i2c_bus = i2cbus;
 436
 437                 drm_encoder_init(dev, &intel_encoder->enc,
 438                                  &intel_dvo_enc_funcs, encoder_type);
 439                 drm_encoder_helper_add(&intel_encoder->enc,
 440                                        &intel_dvo_helper_funcs);
 441
 442                 drm_mode_connector_attach_encoder(&intel_encoder->base,
 443                                                   &intel_encoder->enc);
 444                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
 445                         /* For our LVDS chipsets, we should hopefully be able
 446                          * to dig the fixed panel mode out of the BIOS data.
 447                          * However, it's in a different format from the BIOS
 448                          * data on chipsets with integrated LVDS (stored in AIM
 449                          * headers, likely), so for now, just get the current
 450                          * mode being output through DVO.
 451                          */
 452                         dvo->panel_fixed_mode =
 453                                 intel_dvo_get_current_mode(connector);
 454                         dvo->panel_wants_dither = true;
 455                 }
 456
 457                 drm_sysfs_connector_add(connector);
 458                 return;
 459         }
 460
 461         intel_i2c_destroy(intel_encoder->ddc_bus);
 462         /* Didn't find a chip, so tear down. */
 463         if (i2cbus != NULL)
 464                 intel_i2c_destroy(i2cbus);
 465 free_intel:
 466         kfree(intel_encoder);
 467 }