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 <linux/i2c.h> 29 #include <linux/slab.h> 30 31 #include <drm/drm_atomic_helper.h> 32 #include <drm/drm_crtc.h> 33 34 #include "i915_drv.h" 35 #include "intel_connector.h" 36 #include "intel_de.h" 37 #include "intel_display_types.h" 38 #include "intel_dvo.h" 39 #include "intel_dvo_dev.h" 40 #include "intel_gmbus.h" 41 #include "intel_panel.h" 42 43 #define INTEL_DVO_CHIP_NONE 0 44 #define INTEL_DVO_CHIP_LVDS 1 45 #define INTEL_DVO_CHIP_TMDS 2 46 #define INTEL_DVO_CHIP_TVOUT 4 47 #define INTEL_DVO_CHIP_LVDS_NO_FIXED 5 48 49 #define SIL164_ADDR 0x38 50 #define CH7xxx_ADDR 0x76 51 #define TFP410_ADDR 0x38 52 #define NS2501_ADDR 0x38 53 54 static const struct intel_dvo_device intel_dvo_devices[] = { 55 { 56 .type = INTEL_DVO_CHIP_TMDS, 57 .name = "sil164", 58 .dvo_reg = DVOC, 59 .dvo_srcdim_reg = DVOC_SRCDIM, 60 .slave_addr = SIL164_ADDR, 61 .dev_ops = &sil164_ops, 62 }, 63 { 64 .type = INTEL_DVO_CHIP_TMDS, 65 .name = "ch7xxx", 66 .dvo_reg = DVOC, 67 .dvo_srcdim_reg = DVOC_SRCDIM, 68 .slave_addr = CH7xxx_ADDR, 69 .dev_ops = &ch7xxx_ops, 70 }, 71 { 72 .type = INTEL_DVO_CHIP_TMDS, 73 .name = "ch7xxx", 74 .dvo_reg = DVOC, 75 .dvo_srcdim_reg = DVOC_SRCDIM, 76 .slave_addr = 0x75, /* For some ch7010 */ 77 .dev_ops = &ch7xxx_ops, 78 }, 79 { 80 .type = INTEL_DVO_CHIP_LVDS, 81 .name = "ivch", 82 .dvo_reg = DVOA, 83 .dvo_srcdim_reg = DVOA_SRCDIM, 84 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */ 85 .dev_ops = &ivch_ops, 86 }, 87 { 88 .type = INTEL_DVO_CHIP_TMDS, 89 .name = "tfp410", 90 .dvo_reg = DVOC, 91 .dvo_srcdim_reg = DVOC_SRCDIM, 92 .slave_addr = TFP410_ADDR, 93 .dev_ops = &tfp410_ops, 94 }, 95 { 96 .type = INTEL_DVO_CHIP_LVDS, 97 .name = "ch7017", 98 .dvo_reg = DVOC, 99 .dvo_srcdim_reg = DVOC_SRCDIM, 100 .slave_addr = 0x75, 101 .gpio = GMBUS_PIN_DPB, 102 .dev_ops = &ch7017_ops, 103 }, 104 { 105 .type = INTEL_DVO_CHIP_LVDS_NO_FIXED, 106 .name = "ns2501", 107 .dvo_reg = DVOB, 108 .dvo_srcdim_reg = DVOB_SRCDIM, 109 .slave_addr = NS2501_ADDR, 110 .dev_ops = &ns2501_ops, 111 }, 112 }; 113 114 struct intel_dvo { 115 struct intel_encoder base; 116 117 struct intel_dvo_device dev; 118 119 struct intel_connector *attached_connector; 120 121 bool panel_wants_dither; 122 }; 123 124 static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder) 125 { 126 return container_of(encoder, struct intel_dvo, base); 127 } 128 129 static struct intel_dvo *intel_attached_dvo(struct intel_connector *connector) 130 { 131 return enc_to_dvo(intel_attached_encoder(connector)); 132 } 133 134 static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector) 135 { 136 struct drm_device *dev = connector->base.dev; 137 struct drm_i915_private *dev_priv = to_i915(dev); 138 struct intel_dvo *intel_dvo = intel_attached_dvo(connector); 139 u32 tmp; 140 141 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg); 142 143 if (!(tmp & DVO_ENABLE)) 144 return false; 145 146 return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev); 147 } 148 149 static bool intel_dvo_get_hw_state(struct intel_encoder *encoder, 150 enum pipe *pipe) 151 { 152 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 153 struct intel_dvo *intel_dvo = enc_to_dvo(encoder); 154 u32 tmp; 155 156 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg); 157 158 *pipe = (tmp & DVO_PIPE_SEL_MASK) >> DVO_PIPE_SEL_SHIFT; 159 160 return tmp & DVO_ENABLE; 161 } 162 163 static void intel_dvo_get_config(struct intel_encoder *encoder, 164 struct intel_crtc_state *pipe_config) 165 { 166 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 167 struct intel_dvo *intel_dvo = enc_to_dvo(encoder); 168 u32 tmp, flags = 0; 169 170 pipe_config->output_types |= BIT(INTEL_OUTPUT_DVO); 171 172 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg); 173 if (tmp & DVO_HSYNC_ACTIVE_HIGH) 174 flags |= DRM_MODE_FLAG_PHSYNC; 175 else 176 flags |= DRM_MODE_FLAG_NHSYNC; 177 if (tmp & DVO_VSYNC_ACTIVE_HIGH) 178 flags |= DRM_MODE_FLAG_PVSYNC; 179 else 180 flags |= DRM_MODE_FLAG_NVSYNC; 181 182 pipe_config->hw.adjusted_mode.flags |= flags; 183 184 pipe_config->hw.adjusted_mode.crtc_clock = pipe_config->port_clock; 185 } 186 187 static void intel_disable_dvo(struct intel_atomic_state *state, 188 struct intel_encoder *encoder, 189 const struct intel_crtc_state *old_crtc_state, 190 const struct drm_connector_state *old_conn_state) 191 { 192 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 193 struct intel_dvo *intel_dvo = enc_to_dvo(encoder); 194 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg; 195 u32 temp = intel_de_read(dev_priv, dvo_reg); 196 197 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false); 198 intel_de_write(dev_priv, dvo_reg, temp & ~DVO_ENABLE); 199 intel_de_read(dev_priv, dvo_reg); 200 } 201 202 static void intel_enable_dvo(struct intel_atomic_state *state, 203 struct intel_encoder *encoder, 204 const struct intel_crtc_state *pipe_config, 205 const struct drm_connector_state *conn_state) 206 { 207 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 208 struct intel_dvo *intel_dvo = enc_to_dvo(encoder); 209 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg; 210 u32 temp = intel_de_read(dev_priv, dvo_reg); 211 212 intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, 213 &pipe_config->hw.mode, 214 &pipe_config->hw.adjusted_mode); 215 216 intel_de_write(dev_priv, dvo_reg, temp | DVO_ENABLE); 217 intel_de_read(dev_priv, dvo_reg); 218 219 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true); 220 } 221 222 static enum drm_mode_status 223 intel_dvo_mode_valid(struct drm_connector *connector, 224 struct drm_display_mode *mode) 225 { 226 struct intel_connector *intel_connector = to_intel_connector(connector); 227 struct intel_dvo *intel_dvo = intel_attached_dvo(intel_connector); 228 const struct drm_display_mode *fixed_mode = 229 intel_panel_fixed_mode(intel_connector, mode); 230 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 231 int target_clock = mode->clock; 232 233 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 234 return MODE_NO_DBLESCAN; 235 236 /* XXX: Validate clock range */ 237 238 if (fixed_mode) { 239 enum drm_mode_status status; 240 241 status = intel_panel_mode_valid(intel_connector, mode); 242 if (status != MODE_OK) 243 return status; 244 245 target_clock = fixed_mode->clock; 246 } 247 248 if (target_clock > max_dotclk) 249 return MODE_CLOCK_HIGH; 250 251 return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode); 252 } 253 254 static int intel_dvo_compute_config(struct intel_encoder *encoder, 255 struct intel_crtc_state *pipe_config, 256 struct drm_connector_state *conn_state) 257 { 258 struct intel_dvo *intel_dvo = enc_to_dvo(encoder); 259 struct intel_connector *connector = to_intel_connector(conn_state->connector); 260 struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; 261 const struct drm_display_mode *fixed_mode = 262 intel_panel_fixed_mode(intel_dvo->attached_connector, adjusted_mode); 263 264 /* 265 * If we have timings from the BIOS for the panel, put them in 266 * to the adjusted mode. The CRTC will be set up for this mode, 267 * with the panel scaling set up to source from the H/VDisplay 268 * of the original mode. 269 */ 270 if (fixed_mode) { 271 int ret; 272 273 ret = intel_panel_compute_config(connector, adjusted_mode); 274 if (ret) 275 return ret; 276 } 277 278 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 279 return -EINVAL; 280 281 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 282 283 return 0; 284 } 285 286 static void intel_dvo_pre_enable(struct intel_atomic_state *state, 287 struct intel_encoder *encoder, 288 const struct intel_crtc_state *pipe_config, 289 const struct drm_connector_state *conn_state) 290 { 291 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 292 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); 293 const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; 294 struct intel_dvo *intel_dvo = enc_to_dvo(encoder); 295 enum pipe pipe = crtc->pipe; 296 u32 dvo_val; 297 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg; 298 i915_reg_t dvo_srcdim_reg = intel_dvo->dev.dvo_srcdim_reg; 299 300 /* Save the data order, since I don't know what it should be set to. */ 301 dvo_val = intel_de_read(dev_priv, dvo_reg) & 302 (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG); 303 dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE | 304 DVO_BLANK_ACTIVE_HIGH; 305 306 dvo_val |= DVO_PIPE_SEL(pipe); 307 dvo_val |= DVO_PIPE_STALL; 308 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 309 dvo_val |= DVO_HSYNC_ACTIVE_HIGH; 310 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 311 dvo_val |= DVO_VSYNC_ACTIVE_HIGH; 312 313 intel_de_write(dev_priv, dvo_srcdim_reg, 314 (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT)); 315 intel_de_write(dev_priv, dvo_reg, dvo_val); 316 } 317 318 static enum drm_connector_status 319 intel_dvo_detect(struct drm_connector *connector, bool force) 320 { 321 struct drm_i915_private *i915 = to_i915(connector->dev); 322 struct intel_dvo *intel_dvo = intel_attached_dvo(to_intel_connector(connector)); 323 324 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 325 connector->base.id, connector->name); 326 327 if (!INTEL_DISPLAY_ENABLED(i915)) 328 return connector_status_disconnected; 329 330 return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev); 331 } 332 333 static int intel_dvo_get_modes(struct drm_connector *connector) 334 { 335 struct drm_i915_private *dev_priv = to_i915(connector->dev); 336 int num_modes; 337 338 /* 339 * We should probably have an i2c driver get_modes function for those 340 * devices which will have a fixed set of modes determined by the chip 341 * (TV-out, for example), but for now with just TMDS and LVDS, 342 * that's not the case. 343 */ 344 num_modes = intel_ddc_get_modes(connector, 345 intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPC)); 346 if (num_modes) 347 return num_modes; 348 349 return intel_panel_get_modes(to_intel_connector(connector)); 350 } 351 352 static const struct drm_connector_funcs intel_dvo_connector_funcs = { 353 .detect = intel_dvo_detect, 354 .late_register = intel_connector_register, 355 .early_unregister = intel_connector_unregister, 356 .destroy = intel_connector_destroy, 357 .fill_modes = drm_helper_probe_single_connector_modes, 358 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 359 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 360 }; 361 362 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = { 363 .mode_valid = intel_dvo_mode_valid, 364 .get_modes = intel_dvo_get_modes, 365 }; 366 367 static void intel_dvo_enc_destroy(struct drm_encoder *encoder) 368 { 369 struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder)); 370 371 if (intel_dvo->dev.dev_ops->destroy) 372 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev); 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 static enum port intel_dvo_port(i915_reg_t dvo_reg) 382 { 383 if (i915_mmio_reg_equal(dvo_reg, DVOA)) 384 return PORT_A; 385 else if (i915_mmio_reg_equal(dvo_reg, DVOB)) 386 return PORT_B; 387 else 388 return PORT_C; 389 } 390 391 void intel_dvo_init(struct drm_i915_private *dev_priv) 392 { 393 struct intel_encoder *intel_encoder; 394 struct intel_dvo *intel_dvo; 395 struct intel_connector *intel_connector; 396 int i; 397 int encoder_type = DRM_MODE_ENCODER_NONE; 398 399 intel_dvo = kzalloc(sizeof(*intel_dvo), GFP_KERNEL); 400 if (!intel_dvo) 401 return; 402 403 intel_connector = intel_connector_alloc(); 404 if (!intel_connector) { 405 kfree(intel_dvo); 406 return; 407 } 408 409 intel_dvo->attached_connector = intel_connector; 410 411 intel_encoder = &intel_dvo->base; 412 413 intel_encoder->disable = intel_disable_dvo; 414 intel_encoder->enable = intel_enable_dvo; 415 intel_encoder->get_hw_state = intel_dvo_get_hw_state; 416 intel_encoder->get_config = intel_dvo_get_config; 417 intel_encoder->compute_config = intel_dvo_compute_config; 418 intel_encoder->pre_enable = intel_dvo_pre_enable; 419 intel_connector->get_hw_state = intel_dvo_connector_get_hw_state; 420 421 /* Now, try to find a controller */ 422 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) { 423 struct drm_connector *connector = &intel_connector->base; 424 const struct intel_dvo_device *dvo = &intel_dvo_devices[i]; 425 struct i2c_adapter *i2c; 426 int gpio; 427 bool dvoinit; 428 enum pipe pipe; 429 u32 dpll[I915_MAX_PIPES]; 430 enum port port; 431 432 /* 433 * Allow the I2C driver info to specify the GPIO to be used in 434 * special cases, but otherwise default to what's defined 435 * in the spec. 436 */ 437 if (intel_gmbus_is_valid_pin(dev_priv, dvo->gpio)) 438 gpio = dvo->gpio; 439 else if (dvo->type == INTEL_DVO_CHIP_LVDS) 440 gpio = GMBUS_PIN_SSC; 441 else 442 gpio = GMBUS_PIN_DPB; 443 444 /* 445 * Set up the I2C bus necessary for the chip we're probing. 446 * It appears that everything is on GPIOE except for panels 447 * on i830 laptops, which are on GPIOB (DVOA). 448 */ 449 i2c = intel_gmbus_get_adapter(dev_priv, gpio); 450 451 intel_dvo->dev = *dvo; 452 453 /* 454 * GMBUS NAK handling seems to be unstable, hence let the 455 * transmitter detection run in bit banging mode for now. 456 */ 457 intel_gmbus_force_bit(i2c, true); 458 459 /* 460 * ns2501 requires the DVO 2x clock before it will 461 * respond to i2c accesses, so make sure we have 462 * have the clock enabled before we attempt to 463 * initialize the device. 464 */ 465 for_each_pipe(dev_priv, pipe) { 466 dpll[pipe] = intel_de_read(dev_priv, DPLL(pipe)); 467 intel_de_write(dev_priv, DPLL(pipe), 468 dpll[pipe] | DPLL_DVO_2X_MODE); 469 } 470 471 dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c); 472 473 /* restore the DVO 2x clock state to original */ 474 for_each_pipe(dev_priv, pipe) { 475 intel_de_write(dev_priv, DPLL(pipe), dpll[pipe]); 476 } 477 478 intel_gmbus_force_bit(i2c, false); 479 480 if (!dvoinit) 481 continue; 482 483 port = intel_dvo_port(dvo->dvo_reg); 484 drm_encoder_init(&dev_priv->drm, &intel_encoder->base, 485 &intel_dvo_enc_funcs, encoder_type, 486 "DVO %c", port_name(port)); 487 488 intel_encoder->type = INTEL_OUTPUT_DVO; 489 intel_encoder->power_domain = POWER_DOMAIN_PORT_OTHER; 490 intel_encoder->port = port; 491 intel_encoder->pipe_mask = ~0; 492 493 if (dvo->type != INTEL_DVO_CHIP_LVDS) 494 intel_encoder->cloneable = (1 << INTEL_OUTPUT_ANALOG) | 495 (1 << INTEL_OUTPUT_DVO); 496 497 switch (dvo->type) { 498 case INTEL_DVO_CHIP_TMDS: 499 intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT | 500 DRM_CONNECTOR_POLL_DISCONNECT; 501 drm_connector_init(&dev_priv->drm, connector, 502 &intel_dvo_connector_funcs, 503 DRM_MODE_CONNECTOR_DVII); 504 encoder_type = DRM_MODE_ENCODER_TMDS; 505 break; 506 case INTEL_DVO_CHIP_LVDS_NO_FIXED: 507 case INTEL_DVO_CHIP_LVDS: 508 drm_connector_init(&dev_priv->drm, connector, 509 &intel_dvo_connector_funcs, 510 DRM_MODE_CONNECTOR_LVDS); 511 encoder_type = DRM_MODE_ENCODER_LVDS; 512 break; 513 } 514 515 drm_connector_helper_add(connector, 516 &intel_dvo_connector_helper_funcs); 517 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 518 connector->interlace_allowed = false; 519 connector->doublescan_allowed = false; 520 521 intel_connector_attach_encoder(intel_connector, intel_encoder); 522 if (dvo->type == INTEL_DVO_CHIP_LVDS) { 523 /* 524 * For our LVDS chipsets, we should hopefully be able 525 * to dig the fixed panel mode out of the BIOS data. 526 * However, it's in a different format from the BIOS 527 * data on chipsets with integrated LVDS (stored in AIM 528 * headers, likely), so for now, just get the current 529 * mode being output through DVO. 530 */ 531 intel_panel_add_encoder_fixed_mode(intel_connector, 532 intel_encoder); 533 534 intel_panel_init(intel_connector); 535 536 intel_dvo->panel_wants_dither = true; 537 } 538 539 return; 540 } 541 542 kfree(intel_dvo); 543 kfree(intel_connector); 544 } 545