1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2023 Intel Corporation 4 */ 5 6 #include "xe_display.h" 7 #include "regs/xe_regs.h" 8 9 #include <linux/fb.h> 10 11 #include <drm/drm_drv.h> 12 #include <drm/drm_managed.h> 13 #include <drm/xe_drm.h> 14 15 #include "soc/intel_dram.h" 16 #include "i915_drv.h" /* FIXME: HAS_DISPLAY() depends on this */ 17 #include "intel_acpi.h" 18 #include "intel_audio.h" 19 #include "intel_bw.h" 20 #include "intel_display.h" 21 #include "intel_display_driver.h" 22 #include "intel_display_irq.h" 23 #include "intel_display_types.h" 24 #include "intel_dmc.h" 25 #include "intel_dp.h" 26 #include "intel_fbdev.h" 27 #include "intel_hdcp.h" 28 #include "intel_hotplug.h" 29 #include "intel_opregion.h" 30 #include "xe_module.h" 31 32 /* Xe device functions */ 33 34 static bool has_display(struct xe_device *xe) 35 { 36 return HAS_DISPLAY(xe); 37 } 38 39 /** 40 * xe_display_driver_probe_defer - Detect if we need to wait for other drivers 41 * early on 42 * @pdev: PCI device 43 * 44 * Returns: true if probe needs to be deferred, false otherwise 45 */ 46 bool xe_display_driver_probe_defer(struct pci_dev *pdev) 47 { 48 if (!xe_modparam.enable_display) 49 return 0; 50 51 return intel_display_driver_probe_defer(pdev); 52 } 53 54 static void xe_display_last_close(struct drm_device *dev) 55 { 56 struct xe_device *xe = to_xe_device(dev); 57 58 if (xe->info.enable_display) 59 intel_fbdev_restore_mode(to_xe_device(dev)); 60 } 61 62 /** 63 * xe_display_driver_set_hooks - Add driver flags and hooks for display 64 * @driver: DRM device driver 65 * 66 * Set features and function hooks in @driver that are needed for driving the 67 * display IP. This sets the driver's capability of driving display, regardless 68 * if the device has it enabled 69 */ 70 void xe_display_driver_set_hooks(struct drm_driver *driver) 71 { 72 if (!xe_modparam.enable_display) 73 return; 74 75 driver->driver_features |= DRIVER_MODESET | DRIVER_ATOMIC; 76 driver->lastclose = xe_display_last_close; 77 } 78 79 static void unset_display_features(struct xe_device *xe) 80 { 81 xe->drm.driver_features &= ~(DRIVER_MODESET | DRIVER_ATOMIC); 82 } 83 84 static void display_destroy(struct drm_device *dev, void *dummy) 85 { 86 struct xe_device *xe = to_xe_device(dev); 87 88 destroy_workqueue(xe->display.hotplug.dp_wq); 89 } 90 91 /** 92 * xe_display_create - create display struct 93 * @xe: XE device instance 94 * 95 * Initialize all fields used by the display part. 96 * 97 * TODO: once everything can be inside a single struct, make the struct opaque 98 * to the rest of xe and return it to be xe->display. 99 * 100 * Returns: 0 on success 101 */ 102 int xe_display_create(struct xe_device *xe) 103 { 104 int err; 105 106 spin_lock_init(&xe->display.fb_tracking.lock); 107 108 xe->display.hotplug.dp_wq = alloc_ordered_workqueue("xe-dp", 0); 109 110 drmm_mutex_init(&xe->drm, &xe->sb_lock); 111 xe->enabled_irq_mask = ~0; 112 113 err = drmm_add_action_or_reset(&xe->drm, display_destroy, NULL); 114 if (err) 115 return err; 116 117 return 0; 118 } 119 120 static void xe_display_fini_nommio(struct drm_device *dev, void *dummy) 121 { 122 struct xe_device *xe = to_xe_device(dev); 123 124 if (!xe->info.enable_display) 125 return; 126 127 intel_power_domains_cleanup(xe); 128 } 129 130 int xe_display_init_nommio(struct xe_device *xe) 131 { 132 if (!xe->info.enable_display) 133 return 0; 134 135 /* Fake uncore lock */ 136 spin_lock_init(&xe->uncore.lock); 137 138 /* This must be called before any calls to HAS_PCH_* */ 139 intel_detect_pch(xe); 140 141 return drmm_add_action_or_reset(&xe->drm, xe_display_fini_nommio, xe); 142 } 143 144 static void xe_display_fini_noirq(struct drm_device *dev, void *dummy) 145 { 146 struct xe_device *xe = to_xe_device(dev); 147 148 if (!xe->info.enable_display) 149 return; 150 151 intel_display_driver_remove_noirq(xe); 152 intel_power_domains_driver_remove(xe); 153 } 154 155 int xe_display_init_noirq(struct xe_device *xe) 156 { 157 int err; 158 159 if (!xe->info.enable_display) 160 return 0; 161 162 intel_display_driver_early_probe(xe); 163 164 /* Early display init.. */ 165 intel_opregion_setup(xe); 166 167 /* 168 * Fill the dram structure to get the system dram info. This will be 169 * used for memory latency calculation. 170 */ 171 intel_dram_detect(xe); 172 173 intel_bw_init_hw(xe); 174 175 intel_display_device_info_runtime_init(xe); 176 177 err = intel_display_driver_probe_noirq(xe); 178 if (err) 179 return err; 180 181 return drmm_add_action_or_reset(&xe->drm, xe_display_fini_noirq, NULL); 182 } 183 184 static void xe_display_fini_noaccel(struct drm_device *dev, void *dummy) 185 { 186 struct xe_device *xe = to_xe_device(dev); 187 188 if (!xe->info.enable_display) 189 return; 190 191 intel_display_driver_remove_nogem(xe); 192 } 193 194 int xe_display_init_noaccel(struct xe_device *xe) 195 { 196 int err; 197 198 if (!xe->info.enable_display) 199 return 0; 200 201 err = intel_display_driver_probe_nogem(xe); 202 if (err) 203 return err; 204 205 return drmm_add_action_or_reset(&xe->drm, xe_display_fini_noaccel, NULL); 206 } 207 208 int xe_display_init(struct xe_device *xe) 209 { 210 if (!xe->info.enable_display) 211 return 0; 212 213 return intel_display_driver_probe(xe); 214 } 215 216 void xe_display_fini(struct xe_device *xe) 217 { 218 if (!xe->info.enable_display) 219 return; 220 221 /* poll work can call into fbdev, hence clean that up afterwards */ 222 intel_hpd_poll_fini(xe); 223 intel_fbdev_fini(xe); 224 225 intel_hdcp_component_fini(xe); 226 intel_audio_deinit(xe); 227 } 228 229 void xe_display_register(struct xe_device *xe) 230 { 231 if (!xe->info.enable_display) 232 return; 233 234 intel_display_driver_register(xe); 235 intel_register_dsm_handler(); 236 intel_power_domains_enable(xe); 237 } 238 239 void xe_display_unregister(struct xe_device *xe) 240 { 241 if (!xe->info.enable_display) 242 return; 243 244 intel_unregister_dsm_handler(); 245 intel_power_domains_disable(xe); 246 intel_display_driver_unregister(xe); 247 } 248 249 void xe_display_driver_remove(struct xe_device *xe) 250 { 251 if (!xe->info.enable_display) 252 return; 253 254 intel_display_driver_remove(xe); 255 256 intel_display_device_remove(xe); 257 } 258 259 /* IRQ-related functions */ 260 261 void xe_display_irq_handler(struct xe_device *xe, u32 master_ctl) 262 { 263 if (!xe->info.enable_display) 264 return; 265 266 if (master_ctl & DISPLAY_IRQ) 267 gen11_display_irq_handler(xe); 268 } 269 270 void xe_display_irq_enable(struct xe_device *xe, u32 gu_misc_iir) 271 { 272 if (!xe->info.enable_display) 273 return; 274 275 if (gu_misc_iir & GU_MISC_GSE) 276 intel_opregion_asle_intr(xe); 277 } 278 279 void xe_display_irq_reset(struct xe_device *xe) 280 { 281 if (!xe->info.enable_display) 282 return; 283 284 gen11_display_irq_reset(xe); 285 } 286 287 void xe_display_irq_postinstall(struct xe_device *xe, struct xe_gt *gt) 288 { 289 if (!xe->info.enable_display) 290 return; 291 292 if (gt->info.id == XE_GT0) 293 gen11_de_irq_postinstall(xe); 294 } 295 296 static void intel_suspend_encoders(struct xe_device *xe) 297 { 298 struct drm_device *dev = &xe->drm; 299 struct intel_encoder *encoder; 300 301 if (has_display(xe)) 302 return; 303 304 drm_modeset_lock_all(dev); 305 for_each_intel_encoder(dev, encoder) 306 if (encoder->suspend) 307 encoder->suspend(encoder); 308 drm_modeset_unlock_all(dev); 309 } 310 311 static bool suspend_to_idle(void) 312 { 313 #if IS_ENABLED(CONFIG_ACPI_SLEEP) 314 if (acpi_target_system_state() < ACPI_STATE_S3) 315 return true; 316 #endif 317 return false; 318 } 319 320 void xe_display_pm_suspend(struct xe_device *xe) 321 { 322 bool s2idle = suspend_to_idle(); 323 if (!xe->info.enable_display) 324 return; 325 326 /* 327 * We do a lot of poking in a lot of registers, make sure they work 328 * properly. 329 */ 330 intel_power_domains_disable(xe); 331 if (has_display(xe)) 332 drm_kms_helper_poll_disable(&xe->drm); 333 334 intel_display_driver_suspend(xe); 335 336 intel_dp_mst_suspend(xe); 337 338 intel_hpd_cancel_work(xe); 339 340 intel_suspend_encoders(xe); 341 342 intel_opregion_suspend(xe, s2idle ? PCI_D1 : PCI_D3cold); 343 344 intel_fbdev_set_suspend(&xe->drm, FBINFO_STATE_SUSPENDED, true); 345 346 intel_dmc_suspend(xe); 347 } 348 349 void xe_display_pm_suspend_late(struct xe_device *xe) 350 { 351 bool s2idle = suspend_to_idle(); 352 if (!xe->info.enable_display) 353 return; 354 355 intel_power_domains_suspend(xe, s2idle); 356 357 intel_display_power_suspend_late(xe); 358 } 359 360 void xe_display_pm_resume_early(struct xe_device *xe) 361 { 362 if (!xe->info.enable_display) 363 return; 364 365 intel_display_power_resume_early(xe); 366 367 intel_power_domains_resume(xe); 368 } 369 370 void xe_display_pm_resume(struct xe_device *xe) 371 { 372 if (!xe->info.enable_display) 373 return; 374 375 intel_dmc_resume(xe); 376 377 if (has_display(xe)) 378 drm_mode_config_reset(&xe->drm); 379 380 intel_display_driver_init_hw(xe); 381 intel_hpd_init(xe); 382 383 /* MST sideband requires HPD interrupts enabled */ 384 intel_dp_mst_resume(xe); 385 intel_display_driver_resume(xe); 386 387 intel_hpd_poll_disable(xe); 388 if (has_display(xe)) 389 drm_kms_helper_poll_enable(&xe->drm); 390 391 intel_opregion_resume(xe); 392 393 intel_fbdev_set_suspend(&xe->drm, FBINFO_STATE_RUNNING, false); 394 395 intel_power_domains_enable(xe); 396 } 397 398 void xe_display_probe(struct xe_device *xe) 399 { 400 if (!xe->info.enable_display) 401 goto no_display; 402 403 intel_display_device_probe(xe); 404 405 if (has_display(xe)) 406 return; 407 408 no_display: 409 xe->info.enable_display = false; 410 unset_display_features(xe); 411 } 412