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