intel_dvo.c revision 599be16c6ef70f349edaef43a0ee2712c1af7328
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_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 98static int intel_dvo_mode_valid(struct drm_connector *connector, 99 struct drm_display_mode *mode) 100{ 101 struct drm_encoder *encoder = intel_attached_encoder(connector); 102 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); 103 struct intel_dvo_device *dvo = intel_encoder->dev_priv; 104 105 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 106 return MODE_NO_DBLESCAN; 107 108 /* XXX: Validate clock range */ 109 110 if (dvo->panel_fixed_mode) { 111 if (mode->hdisplay > dvo->panel_fixed_mode->hdisplay) 112 return MODE_PANEL; 113 if (mode->vdisplay > dvo->panel_fixed_mode->vdisplay) 114 return MODE_PANEL; 115 } 116 117 return dvo->dev_ops->mode_valid(dvo, mode); 118} 119 120static bool intel_dvo_mode_fixup(struct drm_encoder *encoder, 121 struct drm_display_mode *mode, 122 struct drm_display_mode *adjusted_mode) 123{ 124 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); 125 struct intel_dvo_device *dvo = intel_encoder->dev_priv; 126 127 /* If we have timings from the BIOS for the panel, put them in 128 * to the adjusted mode. The CRTC will be set up for this mode, 129 * with the panel scaling set up to source from the H/VDisplay 130 * of the original mode. 131 */ 132 if (dvo->panel_fixed_mode != NULL) { 133#define C(x) adjusted_mode->x = dvo->panel_fixed_mode->x 134 C(hdisplay); 135 C(hsync_start); 136 C(hsync_end); 137 C(htotal); 138 C(vdisplay); 139 C(vsync_start); 140 C(vsync_end); 141 C(vtotal); 142 C(clock); 143 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); 144#undef C 145 } 146 147 if (dvo->dev_ops->mode_fixup) 148 return dvo->dev_ops->mode_fixup(dvo, mode, adjusted_mode); 149 150 return true; 151} 152 153static void intel_dvo_mode_set(struct drm_encoder *encoder, 154 struct drm_display_mode *mode, 155 struct drm_display_mode *adjusted_mode) 156{ 157 struct drm_device *dev = encoder->dev; 158 struct drm_i915_private *dev_priv = dev->dev_private; 159 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc); 160 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); 161 struct intel_dvo_device *dvo = intel_encoder->dev_priv; 162 int pipe = intel_crtc->pipe; 163 u32 dvo_val; 164 u32 dvo_reg = dvo->dvo_reg, dvo_srcdim_reg; 165 int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B; 166 167 switch (dvo_reg) { 168 case DVOA: 169 default: 170 dvo_srcdim_reg = DVOA_SRCDIM; 171 break; 172 case DVOB: 173 dvo_srcdim_reg = DVOB_SRCDIM; 174 break; 175 case DVOC: 176 dvo_srcdim_reg = DVOC_SRCDIM; 177 break; 178 } 179 180 dvo->dev_ops->mode_set(dvo, mode, adjusted_mode); 181 182 /* Save the data order, since I don't know what it should be set to. */ 183 dvo_val = I915_READ(dvo_reg) & 184 (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG); 185 dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE | 186 DVO_BLANK_ACTIVE_HIGH; 187 188 if (pipe == 1) 189 dvo_val |= DVO_PIPE_B_SELECT; 190 dvo_val |= DVO_PIPE_STALL; 191 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 192 dvo_val |= DVO_HSYNC_ACTIVE_HIGH; 193 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 194 dvo_val |= DVO_VSYNC_ACTIVE_HIGH; 195 196 I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED); 197 198 /*I915_WRITE(DVOB_SRCDIM, 199 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | 200 (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/ 201 I915_WRITE(dvo_srcdim_reg, 202 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | 203 (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT)); 204 /*I915_WRITE(DVOB, dvo_val);*/ 205 I915_WRITE(dvo_reg, dvo_val); 206} 207 208/** 209 * Detect the output connection on our DVO device. 210 * 211 * Unimplemented. 212 */ 213static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector) 214{ 215 struct drm_encoder *encoder = intel_attached_encoder(connector); 216 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); 217 struct intel_dvo_device *dvo = intel_encoder->dev_priv; 218 219 return dvo->dev_ops->detect(dvo); 220} 221 222static int intel_dvo_get_modes(struct drm_connector *connector) 223{ 224 struct drm_encoder *encoder = intel_attached_encoder(connector); 225 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); 226 struct intel_dvo_device *dvo = intel_encoder->dev_priv; 227 228 /* We should probably have an i2c driver get_modes function for those 229 * devices which will have a fixed set of modes determined by the chip 230 * (TV-out, for example), but for now with just TMDS and LVDS, 231 * that's not the case. 232 */ 233 intel_ddc_get_modes(connector, intel_encoder->ddc_bus); 234 if (!list_empty(&connector->probed_modes)) 235 return 1; 236 237 238 if (dvo->panel_fixed_mode != NULL) { 239 struct drm_display_mode *mode; 240 mode = drm_mode_duplicate(connector->dev, dvo->panel_fixed_mode); 241 if (mode) { 242 drm_mode_probed_add(connector, mode); 243 return 1; 244 } 245 } 246 return 0; 247} 248 249static void intel_dvo_destroy (struct drm_connector *connector) 250{ 251 drm_sysfs_connector_remove(connector); 252 drm_connector_cleanup(connector); 253 kfree(connector); 254} 255 256static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = { 257 .dpms = intel_dvo_dpms, 258 .mode_fixup = intel_dvo_mode_fixup, 259 .prepare = intel_encoder_prepare, 260 .mode_set = intel_dvo_mode_set, 261 .commit = intel_encoder_commit, 262}; 263 264static const struct drm_connector_funcs intel_dvo_connector_funcs = { 265 .dpms = drm_helper_connector_dpms, 266 .detect = intel_dvo_detect, 267 .destroy = intel_dvo_destroy, 268 .fill_modes = drm_helper_probe_single_connector_modes, 269}; 270 271static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = { 272 .mode_valid = intel_dvo_mode_valid, 273 .get_modes = intel_dvo_get_modes, 274 .best_encoder = intel_attached_encoder, 275}; 276 277static void intel_dvo_enc_destroy(struct drm_encoder *encoder) 278{ 279 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); 280 struct intel_dvo_device *dvo = intel_encoder->dev_priv; 281 282 if (dvo) { 283 if (dvo->dev_ops->destroy) 284 dvo->dev_ops->destroy(dvo); 285 if (dvo->panel_fixed_mode) 286 kfree(dvo->panel_fixed_mode); 287 } 288 if (intel_encoder->i2c_bus) 289 intel_i2c_destroy(intel_encoder->i2c_bus); 290 if (intel_encoder->ddc_bus) 291 intel_i2c_destroy(intel_encoder->ddc_bus); 292 drm_encoder_cleanup(encoder); 293 kfree(intel_encoder); 294} 295 296static const struct drm_encoder_funcs intel_dvo_enc_funcs = { 297 .destroy = intel_dvo_enc_destroy, 298}; 299 300 301/** 302 * Attempts to get a fixed panel timing for LVDS (currently only the i830). 303 * 304 * Other chips with DVO LVDS will need to extend this to deal with the LVDS 305 * chip being on DVOB/C and having multiple pipes. 306 */ 307static struct drm_display_mode * 308intel_dvo_get_current_mode (struct drm_connector *connector) 309{ 310 struct drm_device *dev = connector->dev; 311 struct drm_i915_private *dev_priv = dev->dev_private; 312 struct drm_encoder *encoder = intel_attached_encoder(connector); 313 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); 314 struct intel_dvo_device *dvo = intel_encoder->dev_priv; 315 uint32_t dvo_reg = dvo->dvo_reg; 316 uint32_t dvo_val = I915_READ(dvo_reg); 317 struct drm_display_mode *mode = NULL; 318 319 /* If the DVO port is active, that'll be the LVDS, so we can pull out 320 * its timings to get how the BIOS set up the panel. 321 */ 322 if (dvo_val & DVO_ENABLE) { 323 struct drm_crtc *crtc; 324 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0; 325 326 crtc = intel_get_crtc_from_pipe(dev, pipe); 327 if (crtc) { 328 mode = intel_crtc_mode_get(dev, crtc); 329 330 if (mode) { 331 mode->type |= DRM_MODE_TYPE_PREFERRED; 332 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH) 333 mode->flags |= DRM_MODE_FLAG_PHSYNC; 334 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH) 335 mode->flags |= DRM_MODE_FLAG_PVSYNC; 336 } 337 } 338 } 339 return mode; 340} 341 342void intel_dvo_init(struct drm_device *dev) 343{ 344 struct intel_encoder *intel_encoder; 345 struct intel_connector *intel_connector; 346 struct intel_dvo_device *dvo; 347 struct i2c_adapter *i2cbus = NULL; 348 int ret = 0; 349 int i; 350 int encoder_type = DRM_MODE_ENCODER_NONE; 351 intel_encoder = kzalloc (sizeof(struct intel_encoder), GFP_KERNEL); 352 if (!intel_encoder) 353 return; 354 355 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); 356 if (!intel_connector) { 357 kfree(intel_encoder); 358 return; 359 } 360 361 /* Set up the DDC bus */ 362 intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D"); 363 if (!intel_encoder->ddc_bus) 364 goto free_intel; 365 366 /* Now, try to find a controller */ 367 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) { 368 struct drm_connector *connector = &intel_connector->base; 369 int gpio; 370 371 dvo = &intel_dvo_devices[i]; 372 373 /* Allow the I2C driver info to specify the GPIO to be used in 374 * special cases, but otherwise default to what's defined 375 * in the spec. 376 */ 377 if (dvo->gpio != 0) 378 gpio = dvo->gpio; 379 else if (dvo->type == INTEL_DVO_CHIP_LVDS) 380 gpio = GPIOB; 381 else 382 gpio = GPIOE; 383 384 /* Set up the I2C bus necessary for the chip we're probing. 385 * It appears that everything is on GPIOE except for panels 386 * on i830 laptops, which are on GPIOB (DVOA). 387 */ 388 if (i2cbus != NULL) 389 intel_i2c_destroy(i2cbus); 390 if (!(i2cbus = intel_i2c_create(dev, gpio, 391 gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) { 392 continue; 393 } 394 395 if (dvo->dev_ops!= NULL) 396 ret = dvo->dev_ops->init(dvo, i2cbus); 397 else 398 ret = false; 399 400 if (!ret) 401 continue; 402 403 intel_encoder->type = INTEL_OUTPUT_DVO; 404 intel_encoder->crtc_mask = (1 << 0) | (1 << 1); 405 switch (dvo->type) { 406 case INTEL_DVO_CHIP_TMDS: 407 intel_encoder->clone_mask = 408 (1 << INTEL_DVO_TMDS_CLONE_BIT) | 409 (1 << INTEL_ANALOG_CLONE_BIT); 410 drm_connector_init(dev, connector, 411 &intel_dvo_connector_funcs, 412 DRM_MODE_CONNECTOR_DVII); 413 encoder_type = DRM_MODE_ENCODER_TMDS; 414 break; 415 case INTEL_DVO_CHIP_LVDS: 416 intel_encoder->clone_mask = 417 (1 << INTEL_DVO_LVDS_CLONE_BIT); 418 drm_connector_init(dev, connector, 419 &intel_dvo_connector_funcs, 420 DRM_MODE_CONNECTOR_LVDS); 421 encoder_type = DRM_MODE_ENCODER_LVDS; 422 break; 423 } 424 425 drm_connector_helper_add(connector, 426 &intel_dvo_connector_helper_funcs); 427 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 428 connector->interlace_allowed = false; 429 connector->doublescan_allowed = false; 430 431 intel_encoder->dev_priv = dvo; 432 intel_encoder->i2c_bus = i2cbus; 433 434 drm_encoder_init(dev, &intel_encoder->enc, 435 &intel_dvo_enc_funcs, encoder_type); 436 drm_encoder_helper_add(&intel_encoder->enc, 437 &intel_dvo_helper_funcs); 438 439 drm_mode_connector_attach_encoder(&intel_connector->base, 440 &intel_encoder->enc); 441 if (dvo->type == INTEL_DVO_CHIP_LVDS) { 442 /* For our LVDS chipsets, we should hopefully be able 443 * to dig the fixed panel mode out of the BIOS data. 444 * However, it's in a different format from the BIOS 445 * data on chipsets with integrated LVDS (stored in AIM 446 * headers, likely), so for now, just get the current 447 * mode being output through DVO. 448 */ 449 dvo->panel_fixed_mode = 450 intel_dvo_get_current_mode(connector); 451 dvo->panel_wants_dither = true; 452 } 453 454 drm_sysfs_connector_add(connector); 455 return; 456 } 457 458 intel_i2c_destroy(intel_encoder->ddc_bus); 459 /* Didn't find a chip, so tear down. */ 460 if (i2cbus != NULL) 461 intel_i2c_destroy(i2cbus); 462free_intel: 463 kfree(intel_encoder); 464 kfree(intel_connector); 465} 466