intel_dvo.c revision f8aed700c6ec46ddade6570004ce25332283b306
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 40static 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 79static 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 98static 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 114static 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 127static 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 148static 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 181static 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 */ 241static 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 249static 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 275static 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 298static 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 310static 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 318static 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 327static 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 333static void intel_dvo_enc_destroy(struct drm_encoder *encoder) 334{ 335 drm_encoder_cleanup(encoder); 336} 337 338static 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 */ 349static struct drm_display_mode * 350intel_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 383void intel_dvo_init(struct drm_device *dev) 384{ 385 struct intel_output *intel_output; 386 struct intel_dvo_device *dvo; 387 struct i2c_adapter *i2cbus = NULL; 388 int ret = 0; 389 int i; 390 int encoder_type = DRM_MODE_ENCODER_NONE; 391 intel_output = kzalloc (sizeof(struct intel_output), GFP_KERNEL); 392 if (!intel_output) 393 return; 394 395 /* Set up the DDC bus */ 396 intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D"); 397 if (!intel_output->ddc_bus) 398 goto free_intel; 399 400 /* Now, try to find a controller */ 401 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) { 402 struct drm_connector *connector = &intel_output->base; 403 int gpio; 404 405 dvo = &intel_dvo_devices[i]; 406 407 /* Allow the I2C driver info to specify the GPIO to be used in 408 * special cases, but otherwise default to what's defined 409 * in the spec. 410 */ 411 if (dvo->gpio != 0) 412 gpio = dvo->gpio; 413 else if (dvo->type == INTEL_DVO_CHIP_LVDS) 414 gpio = GPIOB; 415 else 416 gpio = GPIOE; 417 418 /* Set up the I2C bus necessary for the chip we're probing. 419 * It appears that everything is on GPIOE except for panels 420 * on i830 laptops, which are on GPIOB (DVOA). 421 */ 422 if (i2cbus != NULL) 423 intel_i2c_destroy(i2cbus); 424 if (!(i2cbus = intel_i2c_create(dev, gpio, 425 gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) { 426 continue; 427 } 428 429 if (dvo->dev_ops!= NULL) 430 ret = dvo->dev_ops->init(dvo, i2cbus); 431 else 432 ret = false; 433 434 if (!ret) 435 continue; 436 437 intel_output->type = INTEL_OUTPUT_DVO; 438 intel_output->crtc_mask = (1 << 0) | (1 << 1); 439 switch (dvo->type) { 440 case INTEL_DVO_CHIP_TMDS: 441 intel_output->clone_mask = 442 (1 << INTEL_DVO_TMDS_CLONE_BIT) | 443 (1 << INTEL_ANALOG_CLONE_BIT); 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 intel_output->clone_mask = 451 (1 << INTEL_DVO_LVDS_CLONE_BIT); 452 drm_connector_init(dev, connector, 453 &intel_dvo_connector_funcs, 454 DRM_MODE_CONNECTOR_LVDS); 455 encoder_type = DRM_MODE_ENCODER_LVDS; 456 break; 457 } 458 459 drm_connector_helper_add(connector, 460 &intel_dvo_connector_helper_funcs); 461 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 462 connector->interlace_allowed = false; 463 connector->doublescan_allowed = false; 464 465 intel_output->dev_priv = dvo; 466 intel_output->i2c_bus = i2cbus; 467 468 drm_encoder_init(dev, &intel_output->enc, 469 &intel_dvo_enc_funcs, encoder_type); 470 drm_encoder_helper_add(&intel_output->enc, 471 &intel_dvo_helper_funcs); 472 473 drm_mode_connector_attach_encoder(&intel_output->base, 474 &intel_output->enc); 475 if (dvo->type == INTEL_DVO_CHIP_LVDS) { 476 /* For our LVDS chipsets, we should hopefully be able 477 * to dig the fixed panel mode out of the BIOS data. 478 * However, it's in a different format from the BIOS 479 * data on chipsets with integrated LVDS (stored in AIM 480 * headers, likely), so for now, just get the current 481 * mode being output through DVO. 482 */ 483 dvo->panel_fixed_mode = 484 intel_dvo_get_current_mode(connector); 485 dvo->panel_wants_dither = true; 486 } 487 488 drm_sysfs_connector_add(connector); 489 return; 490 } 491 492 intel_i2c_destroy(intel_output->ddc_bus); 493 /* Didn't find a chip, so tear down. */ 494 if (i2cbus != NULL) 495 intel_i2c_destroy(i2cbus); 496free_intel: 497 kfree(intel_output); 498} 499