| 1 | /* |
| 2 | * Copyright (c) 2006-2008 Intel Corporation |
| 3 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| 4 | * |
| 5 | * DRM core CRTC related functions |
| 6 | * |
| 7 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 8 | * documentation for any purpose is hereby granted without fee, provided that |
| 9 | * the above copyright notice appear in all copies and that both that copyright |
| 10 | * notice and this permission notice appear in supporting documentation, and |
| 11 | * that the name of the copyright holders not be used in advertising or |
| 12 | * publicity pertaining to distribution of the software without specific, |
| 13 | * written prior permission. The copyright holders make no representations |
| 14 | * about the suitability of this software for any purpose. It is provided "as |
| 15 | * is" without express or implied warranty. |
| 16 | * |
| 17 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 18 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 19 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 20 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 21 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 22 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 23 | * OF THIS SOFTWARE. |
| 24 | * |
| 25 | * Authors: |
| 26 | * Keith Packard |
| 27 | * Eric Anholt <eric@anholt.net> |
| 28 | * Dave Airlie <airlied@linux.ie> |
| 29 | * Jesse Barnes <jesse.barnes@intel.com> |
| 30 | */ |
| 31 | |
| 32 | #include <linux/export.h> |
| 33 | #include <linux/moduleparam.h> |
| 34 | |
| 35 | #include <drm/drmP.h> |
| 36 | #include <drm/drm_crtc.h> |
| 37 | #include <drm/drm_fourcc.h> |
| 38 | #include <drm/drm_crtc_helper.h> |
| 39 | #include <drm/drm_fb_helper.h> |
| 40 | #include <drm/drm_edid.h> |
| 41 | |
| 42 | MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
| 43 | MODULE_DESCRIPTION("DRM KMS helper"); |
| 44 | MODULE_LICENSE("GPL and additional rights"); |
| 45 | |
| 46 | /** |
| 47 | * drm_helper_move_panel_connectors_to_head() - move panels to the front in the |
| 48 | * connector list |
| 49 | * @dev: drm device to operate on |
| 50 | * |
| 51 | * Some userspace presumes that the first connected connector is the main |
| 52 | * display, where it's supposed to display e.g. the login screen. For |
| 53 | * laptops, this should be the main panel. Use this function to sort all |
| 54 | * (eDP/LVDS) panels to the front of the connector list, instead of |
| 55 | * painstakingly trying to initialize them in the right order. |
| 56 | */ |
| 57 | void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
| 58 | { |
| 59 | struct drm_connector *connector, *tmp; |
| 60 | struct list_head panel_list; |
| 61 | |
| 62 | INIT_LIST_HEAD(&panel_list); |
| 63 | |
| 64 | list_for_each_entry_safe(connector, tmp, |
| 65 | &dev->mode_config.connector_list, head) { |
| 66 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || |
| 67 | connector->connector_type == DRM_MODE_CONNECTOR_eDP) |
| 68 | list_move_tail(&connector->head, &panel_list); |
| 69 | } |
| 70 | |
| 71 | list_splice(&panel_list, &dev->mode_config.connector_list); |
| 72 | } |
| 73 | EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); |
| 74 | |
| 75 | static bool drm_kms_helper_poll = true; |
| 76 | module_param_named(poll, drm_kms_helper_poll, bool, 0600); |
| 77 | |
| 78 | static void drm_mode_validate_flag(struct drm_connector *connector, |
| 79 | int flags) |
| 80 | { |
| 81 | struct drm_display_mode *mode; |
| 82 | |
| 83 | if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE | |
| 84 | DRM_MODE_FLAG_3D_MASK)) |
| 85 | return; |
| 86 | |
| 87 | list_for_each_entry(mode, &connector->modes, head) { |
| 88 | if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && |
| 89 | !(flags & DRM_MODE_FLAG_INTERLACE)) |
| 90 | mode->status = MODE_NO_INTERLACE; |
| 91 | if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && |
| 92 | !(flags & DRM_MODE_FLAG_DBLSCAN)) |
| 93 | mode->status = MODE_NO_DBLESCAN; |
| 94 | if ((mode->flags & DRM_MODE_FLAG_3D_MASK) && |
| 95 | !(flags & DRM_MODE_FLAG_3D_MASK)) |
| 96 | mode->status = MODE_NO_STEREO; |
| 97 | } |
| 98 | |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * drm_helper_probe_single_connector_modes - get complete set of display modes |
| 104 | * @connector: connector to probe |
| 105 | * @maxX: max width for modes |
| 106 | * @maxY: max height for modes |
| 107 | * |
| 108 | * LOCKING: |
| 109 | * Caller must hold mode config lock. |
| 110 | * |
| 111 | * Based on the helper callbacks implemented by @connector try to detect all |
| 112 | * valid modes. Modes will first be added to the connector's probed_modes list, |
| 113 | * then culled (based on validity and the @maxX, @maxY parameters) and put into |
| 114 | * the normal modes list. |
| 115 | * |
| 116 | * Intended to be use as a generic implementation of the ->fill_modes() |
| 117 | * @connector vfunc for drivers that use the crtc helpers for output mode |
| 118 | * filtering and detection. |
| 119 | * |
| 120 | * RETURNS: |
| 121 | * Number of modes found on @connector. |
| 122 | */ |
| 123 | int drm_helper_probe_single_connector_modes(struct drm_connector *connector, |
| 124 | uint32_t maxX, uint32_t maxY) |
| 125 | { |
| 126 | struct drm_device *dev = connector->dev; |
| 127 | struct drm_display_mode *mode; |
| 128 | struct drm_connector_helper_funcs *connector_funcs = |
| 129 | connector->helper_private; |
| 130 | int count = 0; |
| 131 | int mode_flags = 0; |
| 132 | bool verbose_prune = true; |
| 133 | |
| 134 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, |
| 135 | drm_get_connector_name(connector)); |
| 136 | /* set all modes to the unverified state */ |
| 137 | list_for_each_entry(mode, &connector->modes, head) |
| 138 | mode->status = MODE_UNVERIFIED; |
| 139 | |
| 140 | if (connector->force) { |
| 141 | if (connector->force == DRM_FORCE_ON) |
| 142 | connector->status = connector_status_connected; |
| 143 | else |
| 144 | connector->status = connector_status_disconnected; |
| 145 | if (connector->funcs->force) |
| 146 | connector->funcs->force(connector); |
| 147 | } else { |
| 148 | connector->status = connector->funcs->detect(connector, true); |
| 149 | } |
| 150 | |
| 151 | /* Re-enable polling in case the global poll config changed. */ |
| 152 | if (drm_kms_helper_poll != dev->mode_config.poll_running) |
| 153 | drm_kms_helper_poll_enable(dev); |
| 154 | |
| 155 | dev->mode_config.poll_running = drm_kms_helper_poll; |
| 156 | |
| 157 | if (connector->status == connector_status_disconnected) { |
| 158 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", |
| 159 | connector->base.id, drm_get_connector_name(connector)); |
| 160 | drm_mode_connector_update_edid_property(connector, NULL); |
| 161 | verbose_prune = false; |
| 162 | goto prune; |
| 163 | } |
| 164 | |
| 165 | #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE |
| 166 | count = drm_load_edid_firmware(connector); |
| 167 | if (count == 0) |
| 168 | #endif |
| 169 | count = (*connector_funcs->get_modes)(connector); |
| 170 | |
| 171 | if (count == 0 && connector->status == connector_status_connected) |
| 172 | count = drm_add_modes_noedid(connector, 1024, 768); |
| 173 | if (count == 0) |
| 174 | goto prune; |
| 175 | |
| 176 | drm_mode_connector_list_update(connector); |
| 177 | |
| 178 | if (maxX && maxY) |
| 179 | drm_mode_validate_size(dev, &connector->modes, maxX, |
| 180 | maxY, 0); |
| 181 | |
| 182 | if (connector->interlace_allowed) |
| 183 | mode_flags |= DRM_MODE_FLAG_INTERLACE; |
| 184 | if (connector->doublescan_allowed) |
| 185 | mode_flags |= DRM_MODE_FLAG_DBLSCAN; |
| 186 | if (connector->stereo_allowed) |
| 187 | mode_flags |= DRM_MODE_FLAG_3D_MASK; |
| 188 | drm_mode_validate_flag(connector, mode_flags); |
| 189 | |
| 190 | list_for_each_entry(mode, &connector->modes, head) { |
| 191 | if (mode->status == MODE_OK) |
| 192 | mode->status = connector_funcs->mode_valid(connector, |
| 193 | mode); |
| 194 | } |
| 195 | |
| 196 | prune: |
| 197 | drm_mode_prune_invalid(dev, &connector->modes, verbose_prune); |
| 198 | |
| 199 | if (list_empty(&connector->modes)) |
| 200 | return 0; |
| 201 | |
| 202 | list_for_each_entry(mode, &connector->modes, head) |
| 203 | mode->vrefresh = drm_mode_vrefresh(mode); |
| 204 | |
| 205 | drm_mode_sort(&connector->modes); |
| 206 | |
| 207 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, |
| 208 | drm_get_connector_name(connector)); |
| 209 | list_for_each_entry(mode, &connector->modes, head) { |
| 210 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
| 211 | drm_mode_debug_printmodeline(mode); |
| 212 | } |
| 213 | |
| 214 | return count; |
| 215 | } |
| 216 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); |
| 217 | |
| 218 | /** |
| 219 | * drm_helper_encoder_in_use - check if a given encoder is in use |
| 220 | * @encoder: encoder to check |
| 221 | * |
| 222 | * LOCKING: |
| 223 | * Caller must hold mode config lock. |
| 224 | * |
| 225 | * Walk @encoders's DRM device's mode_config and see if it's in use. |
| 226 | * |
| 227 | * RETURNS: |
| 228 | * True if @encoder is part of the mode_config, false otherwise. |
| 229 | */ |
| 230 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) |
| 231 | { |
| 232 | struct drm_connector *connector; |
| 233 | struct drm_device *dev = encoder->dev; |
| 234 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| 235 | if (connector->encoder == encoder) |
| 236 | return true; |
| 237 | return false; |
| 238 | } |
| 239 | EXPORT_SYMBOL(drm_helper_encoder_in_use); |
| 240 | |
| 241 | /** |
| 242 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config |
| 243 | * @crtc: CRTC to check |
| 244 | * |
| 245 | * LOCKING: |
| 246 | * Caller must hold mode config lock. |
| 247 | * |
| 248 | * Walk @crtc's DRM device's mode_config and see if it's in use. |
| 249 | * |
| 250 | * RETURNS: |
| 251 | * True if @crtc is part of the mode_config, false otherwise. |
| 252 | */ |
| 253 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) |
| 254 | { |
| 255 | struct drm_encoder *encoder; |
| 256 | struct drm_device *dev = crtc->dev; |
| 257 | /* FIXME: Locking around list access? */ |
| 258 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
| 259 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
| 260 | return true; |
| 261 | return false; |
| 262 | } |
| 263 | EXPORT_SYMBOL(drm_helper_crtc_in_use); |
| 264 | |
| 265 | static void |
| 266 | drm_encoder_disable(struct drm_encoder *encoder) |
| 267 | { |
| 268 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
| 269 | |
| 270 | if (encoder->bridge) |
| 271 | encoder->bridge->funcs->disable(encoder->bridge); |
| 272 | |
| 273 | if (encoder_funcs->disable) |
| 274 | (*encoder_funcs->disable)(encoder); |
| 275 | else |
| 276 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
| 277 | |
| 278 | if (encoder->bridge) |
| 279 | encoder->bridge->funcs->post_disable(encoder->bridge); |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * drm_helper_disable_unused_functions - disable unused objects |
| 284 | * @dev: DRM device |
| 285 | * |
| 286 | * LOCKING: |
| 287 | * Caller must hold mode config lock. |
| 288 | * |
| 289 | * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled |
| 290 | * by calling its dpms function, which should power it off. |
| 291 | */ |
| 292 | void drm_helper_disable_unused_functions(struct drm_device *dev) |
| 293 | { |
| 294 | struct drm_encoder *encoder; |
| 295 | struct drm_connector *connector; |
| 296 | struct drm_crtc *crtc; |
| 297 | |
| 298 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 299 | if (!connector->encoder) |
| 300 | continue; |
| 301 | if (connector->status == connector_status_disconnected) |
| 302 | connector->encoder = NULL; |
| 303 | } |
| 304 | |
| 305 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 306 | if (!drm_helper_encoder_in_use(encoder)) { |
| 307 | drm_encoder_disable(encoder); |
| 308 | /* disconnector encoder from any connector */ |
| 309 | encoder->crtc = NULL; |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| 314 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| 315 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
| 316 | if (!crtc->enabled) { |
| 317 | if (crtc_funcs->disable) |
| 318 | (*crtc_funcs->disable)(crtc); |
| 319 | else |
| 320 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); |
| 321 | crtc->fb = NULL; |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
| 326 | |
| 327 | /** |
| 328 | * drm_encoder_crtc_ok - can a given crtc drive a given encoder? |
| 329 | * @encoder: encoder to test |
| 330 | * @crtc: crtc to test |
| 331 | * |
| 332 | * Return false if @encoder can't be driven by @crtc, true otherwise. |
| 333 | */ |
| 334 | static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, |
| 335 | struct drm_crtc *crtc) |
| 336 | { |
| 337 | struct drm_device *dev; |
| 338 | struct drm_crtc *tmp; |
| 339 | int crtc_mask = 1; |
| 340 | |
| 341 | WARN(!crtc, "checking null crtc?\n"); |
| 342 | |
| 343 | dev = crtc->dev; |
| 344 | |
| 345 | list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { |
| 346 | if (tmp == crtc) |
| 347 | break; |
| 348 | crtc_mask <<= 1; |
| 349 | } |
| 350 | |
| 351 | if (encoder->possible_crtcs & crtc_mask) |
| 352 | return true; |
| 353 | return false; |
| 354 | } |
| 355 | |
| 356 | /* |
| 357 | * Check the CRTC we're going to map each output to vs. its current |
| 358 | * CRTC. If they don't match, we have to disable the output and the CRTC |
| 359 | * since the driver will have to re-route things. |
| 360 | */ |
| 361 | static void |
| 362 | drm_crtc_prepare_encoders(struct drm_device *dev) |
| 363 | { |
| 364 | struct drm_encoder_helper_funcs *encoder_funcs; |
| 365 | struct drm_encoder *encoder; |
| 366 | |
| 367 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 368 | encoder_funcs = encoder->helper_private; |
| 369 | /* Disable unused encoders */ |
| 370 | if (encoder->crtc == NULL) |
| 371 | drm_encoder_disable(encoder); |
| 372 | /* Disable encoders whose CRTC is about to change */ |
| 373 | if (encoder_funcs->get_crtc && |
| 374 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) |
| 375 | drm_encoder_disable(encoder); |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * drm_crtc_helper_set_mode - internal helper to set a mode |
| 381 | * @crtc: CRTC to program |
| 382 | * @mode: mode to use |
| 383 | * @x: horizontal offset into the surface |
| 384 | * @y: vertical offset into the surface |
| 385 | * @old_fb: old framebuffer, for cleanup |
| 386 | * |
| 387 | * LOCKING: |
| 388 | * Caller must hold mode config lock. |
| 389 | * |
| 390 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
| 391 | * to fixup or reject the mode prior to trying to set it. This is an internal |
| 392 | * helper that drivers could e.g. use to update properties that require the |
| 393 | * entire output pipe to be disabled and re-enabled in a new configuration. For |
| 394 | * example for changing whether audio is enabled on a hdmi link or for changing |
| 395 | * panel fitter or dither attributes. It is also called by the |
| 396 | * drm_crtc_helper_set_config() helper function to drive the mode setting |
| 397 | * sequence. |
| 398 | * |
| 399 | * RETURNS: |
| 400 | * True if the mode was set successfully, or false otherwise. |
| 401 | */ |
| 402 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, |
| 403 | struct drm_display_mode *mode, |
| 404 | int x, int y, |
| 405 | struct drm_framebuffer *old_fb) |
| 406 | { |
| 407 | struct drm_device *dev = crtc->dev; |
| 408 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
| 409 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| 410 | struct drm_encoder_helper_funcs *encoder_funcs; |
| 411 | int saved_x, saved_y; |
| 412 | struct drm_encoder *encoder; |
| 413 | bool ret = true; |
| 414 | |
| 415 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
| 416 | if (!crtc->enabled) |
| 417 | return true; |
| 418 | |
| 419 | adjusted_mode = drm_mode_duplicate(dev, mode); |
| 420 | if (!adjusted_mode) |
| 421 | return false; |
| 422 | |
| 423 | saved_hwmode = crtc->hwmode; |
| 424 | saved_mode = crtc->mode; |
| 425 | saved_x = crtc->x; |
| 426 | saved_y = crtc->y; |
| 427 | |
| 428 | /* Update crtc values up front so the driver can rely on them for mode |
| 429 | * setting. |
| 430 | */ |
| 431 | crtc->mode = *mode; |
| 432 | crtc->x = x; |
| 433 | crtc->y = y; |
| 434 | |
| 435 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
| 436 | * adjust it according to limitations or connector properties, and also |
| 437 | * a chance to reject the mode entirely. |
| 438 | */ |
| 439 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 440 | |
| 441 | if (encoder->crtc != crtc) |
| 442 | continue; |
| 443 | |
| 444 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { |
| 445 | ret = encoder->bridge->funcs->mode_fixup( |
| 446 | encoder->bridge, mode, adjusted_mode); |
| 447 | if (!ret) { |
| 448 | DRM_DEBUG_KMS("Bridge fixup failed\n"); |
| 449 | goto done; |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | encoder_funcs = encoder->helper_private; |
| 454 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, |
| 455 | adjusted_mode))) { |
| 456 | DRM_DEBUG_KMS("Encoder fixup failed\n"); |
| 457 | goto done; |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { |
| 462 | DRM_DEBUG_KMS("CRTC fixup failed\n"); |
| 463 | goto done; |
| 464 | } |
| 465 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
| 466 | |
| 467 | /* Prepare the encoders and CRTCs before setting the mode. */ |
| 468 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 469 | |
| 470 | if (encoder->crtc != crtc) |
| 471 | continue; |
| 472 | |
| 473 | if (encoder->bridge) |
| 474 | encoder->bridge->funcs->disable(encoder->bridge); |
| 475 | |
| 476 | encoder_funcs = encoder->helper_private; |
| 477 | /* Disable the encoders as the first thing we do. */ |
| 478 | encoder_funcs->prepare(encoder); |
| 479 | |
| 480 | if (encoder->bridge) |
| 481 | encoder->bridge->funcs->post_disable(encoder->bridge); |
| 482 | } |
| 483 | |
| 484 | drm_crtc_prepare_encoders(dev); |
| 485 | |
| 486 | crtc_funcs->prepare(crtc); |
| 487 | |
| 488 | /* Set up the DPLL and any encoders state that needs to adjust or depend |
| 489 | * on the DPLL. |
| 490 | */ |
| 491 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
| 492 | if (!ret) |
| 493 | goto done; |
| 494 | |
| 495 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 496 | |
| 497 | if (encoder->crtc != crtc) |
| 498 | continue; |
| 499 | |
| 500 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
| 501 | encoder->base.id, drm_get_encoder_name(encoder), |
| 502 | mode->base.id, mode->name); |
| 503 | encoder_funcs = encoder->helper_private; |
| 504 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); |
| 505 | |
| 506 | if (encoder->bridge && encoder->bridge->funcs->mode_set) |
| 507 | encoder->bridge->funcs->mode_set(encoder->bridge, mode, |
| 508 | adjusted_mode); |
| 509 | } |
| 510 | |
| 511 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ |
| 512 | crtc_funcs->commit(crtc); |
| 513 | |
| 514 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 515 | |
| 516 | if (encoder->crtc != crtc) |
| 517 | continue; |
| 518 | |
| 519 | if (encoder->bridge) |
| 520 | encoder->bridge->funcs->pre_enable(encoder->bridge); |
| 521 | |
| 522 | encoder_funcs = encoder->helper_private; |
| 523 | encoder_funcs->commit(encoder); |
| 524 | |
| 525 | if (encoder->bridge) |
| 526 | encoder->bridge->funcs->enable(encoder->bridge); |
| 527 | } |
| 528 | |
| 529 | /* Store real post-adjustment hardware mode. */ |
| 530 | crtc->hwmode = *adjusted_mode; |
| 531 | |
| 532 | /* Calculate and store various constants which |
| 533 | * are later needed by vblank and swap-completion |
| 534 | * timestamping. They are derived from true hwmode. |
| 535 | */ |
| 536 | drm_calc_timestamping_constants(crtc); |
| 537 | |
| 538 | /* FIXME: add subpixel order */ |
| 539 | done: |
| 540 | drm_mode_destroy(dev, adjusted_mode); |
| 541 | if (!ret) { |
| 542 | crtc->hwmode = saved_hwmode; |
| 543 | crtc->mode = saved_mode; |
| 544 | crtc->x = saved_x; |
| 545 | crtc->y = saved_y; |
| 546 | } |
| 547 | |
| 548 | return ret; |
| 549 | } |
| 550 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); |
| 551 | |
| 552 | |
| 553 | static int |
| 554 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
| 555 | { |
| 556 | struct drm_device *dev = crtc->dev; |
| 557 | struct drm_connector *connector; |
| 558 | struct drm_encoder *encoder; |
| 559 | |
| 560 | /* Decouple all encoders and their attached connectors from this crtc */ |
| 561 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 562 | if (encoder->crtc != crtc) |
| 563 | continue; |
| 564 | |
| 565 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 566 | if (connector->encoder != encoder) |
| 567 | continue; |
| 568 | |
| 569 | connector->encoder = NULL; |
| 570 | |
| 571 | /* |
| 572 | * drm_helper_disable_unused_functions() ought to be |
| 573 | * doing this, but since we've decoupled the encoder |
| 574 | * from the connector above, the required connection |
| 575 | * between them is henceforth no longer available. |
| 576 | */ |
| 577 | connector->dpms = DRM_MODE_DPMS_OFF; |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | drm_helper_disable_unused_functions(dev); |
| 582 | return 0; |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * drm_crtc_helper_set_config - set a new config from userspace |
| 587 | * @set: mode set configuration |
| 588 | * |
| 589 | * LOCKING: |
| 590 | * Caller must hold mode config lock. |
| 591 | * |
| 592 | * Setup a new configuration, provided by the upper layers (either an ioctl call |
| 593 | * from userspace or internally e.g. from the fbdev suppport code) in @set, and |
| 594 | * enable it. This is the main helper functions for drivers that implement |
| 595 | * kernel mode setting with the crtc helper functions and the assorted |
| 596 | * ->prepare(), ->modeset() and ->commit() helper callbacks. |
| 597 | * |
| 598 | * RETURNS: |
| 599 | * Returns 0 on success, -ERRNO on failure. |
| 600 | */ |
| 601 | int drm_crtc_helper_set_config(struct drm_mode_set *set) |
| 602 | { |
| 603 | struct drm_device *dev; |
| 604 | struct drm_crtc *save_crtcs, *new_crtc, *crtc; |
| 605 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
| 606 | bool mode_changed = false; /* if true do a full mode set */ |
| 607 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ |
| 608 | struct drm_connector *save_connectors, *connector; |
| 609 | int count = 0, ro, fail = 0; |
| 610 | struct drm_crtc_helper_funcs *crtc_funcs; |
| 611 | struct drm_mode_set save_set; |
| 612 | int ret; |
| 613 | int i; |
| 614 | |
| 615 | DRM_DEBUG_KMS("\n"); |
| 616 | |
| 617 | BUG_ON(!set); |
| 618 | BUG_ON(!set->crtc); |
| 619 | BUG_ON(!set->crtc->helper_private); |
| 620 | |
| 621 | /* Enforce sane interface api - has been abused by the fb helper. */ |
| 622 | BUG_ON(!set->mode && set->fb); |
| 623 | BUG_ON(set->fb && set->num_connectors == 0); |
| 624 | |
| 625 | crtc_funcs = set->crtc->helper_private; |
| 626 | |
| 627 | if (!set->mode) |
| 628 | set->fb = NULL; |
| 629 | |
| 630 | if (set->fb) { |
| 631 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
| 632 | set->crtc->base.id, set->fb->base.id, |
| 633 | (int)set->num_connectors, set->x, set->y); |
| 634 | } else { |
| 635 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
| 636 | return drm_crtc_helper_disable(set->crtc); |
| 637 | } |
| 638 | |
| 639 | dev = set->crtc->dev; |
| 640 | |
| 641 | /* Allocate space for the backup of all (non-pointer) crtc, encoder and |
| 642 | * connector data. */ |
| 643 | save_crtcs = kzalloc(dev->mode_config.num_crtc * |
| 644 | sizeof(struct drm_crtc), GFP_KERNEL); |
| 645 | if (!save_crtcs) |
| 646 | return -ENOMEM; |
| 647 | |
| 648 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
| 649 | sizeof(struct drm_encoder), GFP_KERNEL); |
| 650 | if (!save_encoders) { |
| 651 | kfree(save_crtcs); |
| 652 | return -ENOMEM; |
| 653 | } |
| 654 | |
| 655 | save_connectors = kzalloc(dev->mode_config.num_connector * |
| 656 | sizeof(struct drm_connector), GFP_KERNEL); |
| 657 | if (!save_connectors) { |
| 658 | kfree(save_crtcs); |
| 659 | kfree(save_encoders); |
| 660 | return -ENOMEM; |
| 661 | } |
| 662 | |
| 663 | /* Copy data. Note that driver private data is not affected. |
| 664 | * Should anything bad happen only the expected state is |
| 665 | * restored, not the drivers personal bookkeeping. |
| 666 | */ |
| 667 | count = 0; |
| 668 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| 669 | save_crtcs[count++] = *crtc; |
| 670 | } |
| 671 | |
| 672 | count = 0; |
| 673 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 674 | save_encoders[count++] = *encoder; |
| 675 | } |
| 676 | |
| 677 | count = 0; |
| 678 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 679 | save_connectors[count++] = *connector; |
| 680 | } |
| 681 | |
| 682 | save_set.crtc = set->crtc; |
| 683 | save_set.mode = &set->crtc->mode; |
| 684 | save_set.x = set->crtc->x; |
| 685 | save_set.y = set->crtc->y; |
| 686 | save_set.fb = set->crtc->fb; |
| 687 | |
| 688 | /* We should be able to check here if the fb has the same properties |
| 689 | * and then just flip_or_move it */ |
| 690 | if (set->crtc->fb != set->fb) { |
| 691 | /* If we have no fb then treat it as a full mode set */ |
| 692 | if (set->crtc->fb == NULL) { |
| 693 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
| 694 | mode_changed = true; |
| 695 | } else if (set->fb == NULL) { |
| 696 | mode_changed = true; |
| 697 | } else if (set->fb->pixel_format != |
| 698 | set->crtc->fb->pixel_format) { |
| 699 | mode_changed = true; |
| 700 | } else |
| 701 | fb_changed = true; |
| 702 | } |
| 703 | |
| 704 | if (set->x != set->crtc->x || set->y != set->crtc->y) |
| 705 | fb_changed = true; |
| 706 | |
| 707 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { |
| 708 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
| 709 | drm_mode_debug_printmodeline(&set->crtc->mode); |
| 710 | drm_mode_debug_printmodeline(set->mode); |
| 711 | mode_changed = true; |
| 712 | } |
| 713 | |
| 714 | /* a) traverse passed in connector list and get encoders for them */ |
| 715 | count = 0; |
| 716 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 717 | struct drm_connector_helper_funcs *connector_funcs = |
| 718 | connector->helper_private; |
| 719 | new_encoder = connector->encoder; |
| 720 | for (ro = 0; ro < set->num_connectors; ro++) { |
| 721 | if (set->connectors[ro] == connector) { |
| 722 | new_encoder = connector_funcs->best_encoder(connector); |
| 723 | /* if we can't get an encoder for a connector |
| 724 | we are setting now - then fail */ |
| 725 | if (new_encoder == NULL) |
| 726 | /* don't break so fail path works correct */ |
| 727 | fail = 1; |
| 728 | break; |
| 729 | |
| 730 | if (connector->dpms != DRM_MODE_DPMS_ON) { |
| 731 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); |
| 732 | mode_changed = true; |
| 733 | } |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | if (new_encoder != connector->encoder) { |
| 738 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
| 739 | mode_changed = true; |
| 740 | /* If the encoder is reused for another connector, then |
| 741 | * the appropriate crtc will be set later. |
| 742 | */ |
| 743 | if (connector->encoder) |
| 744 | connector->encoder->crtc = NULL; |
| 745 | connector->encoder = new_encoder; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | if (fail) { |
| 750 | ret = -EINVAL; |
| 751 | goto fail; |
| 752 | } |
| 753 | |
| 754 | count = 0; |
| 755 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 756 | if (!connector->encoder) |
| 757 | continue; |
| 758 | |
| 759 | if (connector->encoder->crtc == set->crtc) |
| 760 | new_crtc = NULL; |
| 761 | else |
| 762 | new_crtc = connector->encoder->crtc; |
| 763 | |
| 764 | for (ro = 0; ro < set->num_connectors; ro++) { |
| 765 | if (set->connectors[ro] == connector) |
| 766 | new_crtc = set->crtc; |
| 767 | } |
| 768 | |
| 769 | /* Make sure the new CRTC will work with the encoder */ |
| 770 | if (new_crtc && |
| 771 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { |
| 772 | ret = -EINVAL; |
| 773 | goto fail; |
| 774 | } |
| 775 | if (new_crtc != connector->encoder->crtc) { |
| 776 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
| 777 | mode_changed = true; |
| 778 | connector->encoder->crtc = new_crtc; |
| 779 | } |
| 780 | if (new_crtc) { |
| 781 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", |
| 782 | connector->base.id, drm_get_connector_name(connector), |
| 783 | new_crtc->base.id); |
| 784 | } else { |
| 785 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", |
| 786 | connector->base.id, drm_get_connector_name(connector)); |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | /* mode_set_base is not a required function */ |
| 791 | if (fb_changed && !crtc_funcs->mode_set_base) |
| 792 | mode_changed = true; |
| 793 | |
| 794 | if (mode_changed) { |
| 795 | set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); |
| 796 | if (set->crtc->enabled) { |
| 797 | DRM_DEBUG_KMS("attempting to set mode from" |
| 798 | " userspace\n"); |
| 799 | drm_mode_debug_printmodeline(set->mode); |
| 800 | set->crtc->fb = set->fb; |
| 801 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
| 802 | set->x, set->y, |
| 803 | save_set.fb)) { |
| 804 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
| 805 | set->crtc->base.id); |
| 806 | set->crtc->fb = save_set.fb; |
| 807 | ret = -EINVAL; |
| 808 | goto fail; |
| 809 | } |
| 810 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
| 811 | for (i = 0; i < set->num_connectors; i++) { |
| 812 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, |
| 813 | drm_get_connector_name(set->connectors[i])); |
| 814 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
| 815 | } |
| 816 | } |
| 817 | drm_helper_disable_unused_functions(dev); |
| 818 | } else if (fb_changed) { |
| 819 | set->crtc->x = set->x; |
| 820 | set->crtc->y = set->y; |
| 821 | set->crtc->fb = set->fb; |
| 822 | ret = crtc_funcs->mode_set_base(set->crtc, |
| 823 | set->x, set->y, save_set.fb); |
| 824 | if (ret != 0) { |
| 825 | set->crtc->x = save_set.x; |
| 826 | set->crtc->y = save_set.y; |
| 827 | set->crtc->fb = save_set.fb; |
| 828 | goto fail; |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | kfree(save_connectors); |
| 833 | kfree(save_encoders); |
| 834 | kfree(save_crtcs); |
| 835 | return 0; |
| 836 | |
| 837 | fail: |
| 838 | /* Restore all previous data. */ |
| 839 | count = 0; |
| 840 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| 841 | *crtc = save_crtcs[count++]; |
| 842 | } |
| 843 | |
| 844 | count = 0; |
| 845 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 846 | *encoder = save_encoders[count++]; |
| 847 | } |
| 848 | |
| 849 | count = 0; |
| 850 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 851 | *connector = save_connectors[count++]; |
| 852 | } |
| 853 | |
| 854 | /* Try to restore the config */ |
| 855 | if (mode_changed && |
| 856 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, |
| 857 | save_set.y, save_set.fb)) |
| 858 | DRM_ERROR("failed to restore config after modeset failure\n"); |
| 859 | |
| 860 | kfree(save_connectors); |
| 861 | kfree(save_encoders); |
| 862 | kfree(save_crtcs); |
| 863 | return ret; |
| 864 | } |
| 865 | EXPORT_SYMBOL(drm_crtc_helper_set_config); |
| 866 | |
| 867 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
| 868 | { |
| 869 | int dpms = DRM_MODE_DPMS_OFF; |
| 870 | struct drm_connector *connector; |
| 871 | struct drm_device *dev = encoder->dev; |
| 872 | |
| 873 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| 874 | if (connector->encoder == encoder) |
| 875 | if (connector->dpms < dpms) |
| 876 | dpms = connector->dpms; |
| 877 | return dpms; |
| 878 | } |
| 879 | |
| 880 | /* Helper which handles bridge ordering around encoder dpms */ |
| 881 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) |
| 882 | { |
| 883 | struct drm_bridge *bridge = encoder->bridge; |
| 884 | struct drm_encoder_helper_funcs *encoder_funcs; |
| 885 | |
| 886 | if (bridge) { |
| 887 | if (mode == DRM_MODE_DPMS_ON) |
| 888 | bridge->funcs->pre_enable(bridge); |
| 889 | else |
| 890 | bridge->funcs->disable(bridge); |
| 891 | } |
| 892 | |
| 893 | encoder_funcs = encoder->helper_private; |
| 894 | if (encoder_funcs->dpms) |
| 895 | encoder_funcs->dpms(encoder, mode); |
| 896 | |
| 897 | if (bridge) { |
| 898 | if (mode == DRM_MODE_DPMS_ON) |
| 899 | bridge->funcs->enable(bridge); |
| 900 | else |
| 901 | bridge->funcs->post_disable(bridge); |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
| 906 | { |
| 907 | int dpms = DRM_MODE_DPMS_OFF; |
| 908 | struct drm_connector *connector; |
| 909 | struct drm_device *dev = crtc->dev; |
| 910 | |
| 911 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| 912 | if (connector->encoder && connector->encoder->crtc == crtc) |
| 913 | if (connector->dpms < dpms) |
| 914 | dpms = connector->dpms; |
| 915 | return dpms; |
| 916 | } |
| 917 | |
| 918 | /** |
| 919 | * drm_helper_connector_dpms() - connector dpms helper implementation |
| 920 | * @connector: affected connector |
| 921 | * @mode: DPMS mode |
| 922 | * |
| 923 | * This is the main helper function provided by the crtc helper framework for |
| 924 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
| 925 | * state for all encoders and crtcs in the output mesh and calls the ->dpms() |
| 926 | * callback provided by the driver appropriately. |
| 927 | */ |
| 928 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
| 929 | { |
| 930 | struct drm_encoder *encoder = connector->encoder; |
| 931 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; |
| 932 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
| 933 | |
| 934 | if (mode == connector->dpms) |
| 935 | return; |
| 936 | |
| 937 | old_dpms = connector->dpms; |
| 938 | connector->dpms = mode; |
| 939 | |
| 940 | if (encoder) |
| 941 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); |
| 942 | |
| 943 | /* from off to on, do crtc then encoder */ |
| 944 | if (mode < old_dpms) { |
| 945 | if (crtc) { |
| 946 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| 947 | if (crtc_funcs->dpms) |
| 948 | (*crtc_funcs->dpms) (crtc, |
| 949 | drm_helper_choose_crtc_dpms(crtc)); |
| 950 | } |
| 951 | if (encoder) |
| 952 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
| 953 | } |
| 954 | |
| 955 | /* from on to off, do encoder then crtc */ |
| 956 | if (mode > old_dpms) { |
| 957 | if (encoder) |
| 958 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
| 959 | if (crtc) { |
| 960 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| 961 | if (crtc_funcs->dpms) |
| 962 | (*crtc_funcs->dpms) (crtc, |
| 963 | drm_helper_choose_crtc_dpms(crtc)); |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | return; |
| 968 | } |
| 969 | EXPORT_SYMBOL(drm_helper_connector_dpms); |
| 970 | |
| 971 | int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
| 972 | struct drm_mode_fb_cmd2 *mode_cmd) |
| 973 | { |
| 974 | int i; |
| 975 | |
| 976 | fb->width = mode_cmd->width; |
| 977 | fb->height = mode_cmd->height; |
| 978 | for (i = 0; i < 4; i++) { |
| 979 | fb->pitches[i] = mode_cmd->pitches[i]; |
| 980 | fb->offsets[i] = mode_cmd->offsets[i]; |
| 981 | } |
| 982 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
| 983 | &fb->bits_per_pixel); |
| 984 | fb->pixel_format = mode_cmd->pixel_format; |
| 985 | |
| 986 | return 0; |
| 987 | } |
| 988 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); |
| 989 | |
| 990 | int drm_helper_resume_force_mode(struct drm_device *dev) |
| 991 | { |
| 992 | struct drm_crtc *crtc; |
| 993 | struct drm_encoder *encoder; |
| 994 | struct drm_crtc_helper_funcs *crtc_funcs; |
| 995 | int ret, encoder_dpms; |
| 996 | |
| 997 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| 998 | |
| 999 | if (!crtc->enabled) |
| 1000 | continue; |
| 1001 | |
| 1002 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
| 1003 | crtc->x, crtc->y, crtc->fb); |
| 1004 | |
| 1005 | if (ret == false) |
| 1006 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); |
| 1007 | |
| 1008 | /* Turn off outputs that were already powered off */ |
| 1009 | if (drm_helper_choose_crtc_dpms(crtc)) { |
| 1010 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| 1011 | |
| 1012 | if(encoder->crtc != crtc) |
| 1013 | continue; |
| 1014 | |
| 1015 | encoder_dpms = drm_helper_choose_encoder_dpms( |
| 1016 | encoder); |
| 1017 | |
| 1018 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
| 1019 | } |
| 1020 | |
| 1021 | crtc_funcs = crtc->helper_private; |
| 1022 | if (crtc_funcs->dpms) |
| 1023 | (*crtc_funcs->dpms) (crtc, |
| 1024 | drm_helper_choose_crtc_dpms(crtc)); |
| 1025 | } |
| 1026 | } |
| 1027 | /* disable the unused connectors while restoring the modesetting */ |
| 1028 | drm_helper_disable_unused_functions(dev); |
| 1029 | return 0; |
| 1030 | } |
| 1031 | EXPORT_SYMBOL(drm_helper_resume_force_mode); |
| 1032 | |
| 1033 | void drm_kms_helper_hotplug_event(struct drm_device *dev) |
| 1034 | { |
| 1035 | /* send a uevent + call fbdev */ |
| 1036 | drm_sysfs_hotplug_event(dev); |
| 1037 | if (dev->mode_config.funcs->output_poll_changed) |
| 1038 | dev->mode_config.funcs->output_poll_changed(dev); |
| 1039 | } |
| 1040 | EXPORT_SYMBOL(drm_kms_helper_hotplug_event); |
| 1041 | |
| 1042 | #define DRM_OUTPUT_POLL_PERIOD (10*HZ) |
| 1043 | static void output_poll_execute(struct work_struct *work) |
| 1044 | { |
| 1045 | struct delayed_work *delayed_work = to_delayed_work(work); |
| 1046 | struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); |
| 1047 | struct drm_connector *connector; |
| 1048 | enum drm_connector_status old_status; |
| 1049 | bool repoll = false, changed = false; |
| 1050 | |
| 1051 | if (!drm_kms_helper_poll) |
| 1052 | return; |
| 1053 | |
| 1054 | mutex_lock(&dev->mode_config.mutex); |
| 1055 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 1056 | |
| 1057 | /* Ignore forced connectors. */ |
| 1058 | if (connector->force) |
| 1059 | continue; |
| 1060 | |
| 1061 | /* Ignore HPD capable connectors and connectors where we don't |
| 1062 | * want any hotplug detection at all for polling. */ |
| 1063 | if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) |
| 1064 | continue; |
| 1065 | |
| 1066 | repoll = true; |
| 1067 | |
| 1068 | old_status = connector->status; |
| 1069 | /* if we are connected and don't want to poll for disconnect |
| 1070 | skip it */ |
| 1071 | if (old_status == connector_status_connected && |
| 1072 | !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) |
| 1073 | continue; |
| 1074 | |
| 1075 | connector->status = connector->funcs->detect(connector, false); |
| 1076 | if (old_status != connector->status) { |
| 1077 | const char *old, *new; |
| 1078 | |
| 1079 | old = drm_get_connector_status_name(old_status); |
| 1080 | new = drm_get_connector_status_name(connector->status); |
| 1081 | |
| 1082 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] " |
| 1083 | "status updated from %s to %s\n", |
| 1084 | connector->base.id, |
| 1085 | drm_get_connector_name(connector), |
| 1086 | old, new); |
| 1087 | |
| 1088 | changed = true; |
| 1089 | } |
| 1090 | } |
| 1091 | |
| 1092 | mutex_unlock(&dev->mode_config.mutex); |
| 1093 | |
| 1094 | if (changed) |
| 1095 | drm_kms_helper_hotplug_event(dev); |
| 1096 | |
| 1097 | if (repoll) |
| 1098 | schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); |
| 1099 | } |
| 1100 | |
| 1101 | void drm_kms_helper_poll_disable(struct drm_device *dev) |
| 1102 | { |
| 1103 | if (!dev->mode_config.poll_enabled) |
| 1104 | return; |
| 1105 | cancel_delayed_work_sync(&dev->mode_config.output_poll_work); |
| 1106 | } |
| 1107 | EXPORT_SYMBOL(drm_kms_helper_poll_disable); |
| 1108 | |
| 1109 | void drm_kms_helper_poll_enable(struct drm_device *dev) |
| 1110 | { |
| 1111 | bool poll = false; |
| 1112 | struct drm_connector *connector; |
| 1113 | |
| 1114 | if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) |
| 1115 | return; |
| 1116 | |
| 1117 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 1118 | if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | |
| 1119 | DRM_CONNECTOR_POLL_DISCONNECT)) |
| 1120 | poll = true; |
| 1121 | } |
| 1122 | |
| 1123 | if (poll) |
| 1124 | schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); |
| 1125 | } |
| 1126 | EXPORT_SYMBOL(drm_kms_helper_poll_enable); |
| 1127 | |
| 1128 | void drm_kms_helper_poll_init(struct drm_device *dev) |
| 1129 | { |
| 1130 | INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); |
| 1131 | dev->mode_config.poll_enabled = true; |
| 1132 | |
| 1133 | drm_kms_helper_poll_enable(dev); |
| 1134 | } |
| 1135 | EXPORT_SYMBOL(drm_kms_helper_poll_init); |
| 1136 | |
| 1137 | void drm_kms_helper_poll_fini(struct drm_device *dev) |
| 1138 | { |
| 1139 | drm_kms_helper_poll_disable(dev); |
| 1140 | } |
| 1141 | EXPORT_SYMBOL(drm_kms_helper_poll_fini); |
| 1142 | |
| 1143 | bool drm_helper_hpd_irq_event(struct drm_device *dev) |
| 1144 | { |
| 1145 | struct drm_connector *connector; |
| 1146 | enum drm_connector_status old_status; |
| 1147 | bool changed = false; |
| 1148 | |
| 1149 | if (!dev->mode_config.poll_enabled) |
| 1150 | return false; |
| 1151 | |
| 1152 | mutex_lock(&dev->mode_config.mutex); |
| 1153 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 1154 | |
| 1155 | /* Only handle HPD capable connectors. */ |
| 1156 | if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) |
| 1157 | continue; |
| 1158 | |
| 1159 | old_status = connector->status; |
| 1160 | |
| 1161 | connector->status = connector->funcs->detect(connector, false); |
| 1162 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", |
| 1163 | connector->base.id, |
| 1164 | drm_get_connector_name(connector), |
| 1165 | drm_get_connector_status_name(old_status), |
| 1166 | drm_get_connector_status_name(connector->status)); |
| 1167 | if (old_status != connector->status) |
| 1168 | changed = true; |
| 1169 | } |
| 1170 | |
| 1171 | mutex_unlock(&dev->mode_config.mutex); |
| 1172 | |
| 1173 | if (changed) |
| 1174 | drm_kms_helper_hotplug_event(dev); |
| 1175 | |
| 1176 | return changed; |
| 1177 | } |
| 1178 | EXPORT_SYMBOL(drm_helper_hpd_irq_event); |