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