1 /*
2  * Copyright 2007-8 Advanced Micro Devices, Inc.
3  * Copyright 2008 Red Hat Inc.
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 shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  * Authors: Dave Airlie
24  *          Alex Deucher
25  */
26 
27 #include <drm/amdgpu_drm.h>
28 #include "amdgpu.h"
29 #include "amdgpu_i2c.h"
30 #include "atom.h"
31 #include "amdgpu_connectors.h"
32 #include "amdgpu_display.h"
33 #include "soc15_common.h"
34 #include "gc/gc_11_0_0_offset.h"
35 #include "gc/gc_11_0_0_sh_mask.h"
36 #include <asm/div64.h>
37 
38 #include <linux/pci.h>
39 #include <linux/pm_runtime.h>
40 #include <drm/drm_crtc_helper.h>
41 #include <drm/drm_damage_helper.h>
42 #include <drm/drm_drv.h>
43 #include <drm/drm_edid.h>
44 #include <drm/drm_fb_helper.h>
45 #include <drm/drm_gem_framebuffer_helper.h>
46 #include <drm/drm_fourcc.h>
47 #include <drm/drm_modeset_helper.h>
48 #include <drm/drm_vblank.h>
49 
50 /**
51  * amdgpu_display_hotplug_work_func - work handler for display hotplug event
52  *
53  * @work: work struct pointer
54  *
55  * This is the hotplug event work handler (all ASICs).
56  * The work gets scheduled from the IRQ handler if there
57  * was a hotplug interrupt.  It walks through the connector table
58  * and calls hotplug handler for each connector. After this, it sends
59  * a DRM hotplug event to alert userspace.
60  *
61  * This design approach is required in order to defer hotplug event handling
62  * from the IRQ handler to a work handler because hotplug handler has to use
63  * mutexes which cannot be locked in an IRQ handler (since &mutex_lock may
64  * sleep).
65  */
66 void amdgpu_display_hotplug_work_func(struct work_struct *work)
67 {
68 	struct amdgpu_device *adev = container_of(work, struct amdgpu_device,
69 						  hotplug_work.work);
70 	struct drm_device *dev = adev_to_drm(adev);
71 	struct drm_mode_config *mode_config = &dev->mode_config;
72 	struct drm_connector *connector;
73 	struct drm_connector_list_iter iter;
74 
75 	mutex_lock(&mode_config->mutex);
76 	drm_connector_list_iter_begin(dev, &iter);
77 	drm_for_each_connector_iter(connector, &iter)
78 		amdgpu_connector_hotplug(connector);
79 	drm_connector_list_iter_end(&iter);
80 	mutex_unlock(&mode_config->mutex);
81 	/* Just fire off a uevent and let userspace tell us what to do */
82 	drm_helper_hpd_irq_event(dev);
83 }
84 
85 static int amdgpu_display_framebuffer_init(struct drm_device *dev,
86 					   struct amdgpu_framebuffer *rfb,
87 					   const struct drm_mode_fb_cmd2 *mode_cmd,
88 					   struct drm_gem_object *obj);
89 
90 static void amdgpu_display_flip_callback(struct dma_fence *f,
91 					 struct dma_fence_cb *cb)
92 {
93 	struct amdgpu_flip_work *work =
94 		container_of(cb, struct amdgpu_flip_work, cb);
95 
96 	dma_fence_put(f);
97 	schedule_work(&work->flip_work.work);
98 }
99 
100 static bool amdgpu_display_flip_handle_fence(struct amdgpu_flip_work *work,
101 					     struct dma_fence **f)
102 {
103 	struct dma_fence *fence = *f;
104 
105 	if (fence == NULL)
106 		return false;
107 
108 	*f = NULL;
109 
110 	if (!dma_fence_add_callback(fence, &work->cb,
111 				    amdgpu_display_flip_callback))
112 		return true;
113 
114 	dma_fence_put(fence);
115 	return false;
116 }
117 
118 static void amdgpu_display_flip_work_func(struct work_struct *__work)
119 {
120 	struct delayed_work *delayed_work =
121 		container_of(__work, struct delayed_work, work);
122 	struct amdgpu_flip_work *work =
123 		container_of(delayed_work, struct amdgpu_flip_work, flip_work);
124 	struct amdgpu_device *adev = work->adev;
125 	struct amdgpu_crtc *amdgpu_crtc = adev->mode_info.crtcs[work->crtc_id];
126 
127 	struct drm_crtc *crtc = &amdgpu_crtc->base;
128 	unsigned long flags;
129 	unsigned int i;
130 	int vpos, hpos;
131 
132 	for (i = 0; i < work->shared_count; ++i)
133 		if (amdgpu_display_flip_handle_fence(work, &work->shared[i]))
134 			return;
135 
136 	/* Wait until we're out of the vertical blank period before the one
137 	 * targeted by the flip
138 	 */
139 	if (amdgpu_crtc->enabled &&
140 	    (amdgpu_display_get_crtc_scanoutpos(adev_to_drm(adev), work->crtc_id, 0,
141 						&vpos, &hpos, NULL, NULL,
142 						&crtc->hwmode)
143 	     & (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_IN_VBLANK)) ==
144 	    (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_IN_VBLANK) &&
145 	    (int)(work->target_vblank -
146 		  amdgpu_get_vblank_counter_kms(crtc)) > 0) {
147 		schedule_delayed_work(&work->flip_work, usecs_to_jiffies(1000));
148 		return;
149 	}
150 
151 	/* We borrow the event spin lock for protecting flip_status */
152 	spin_lock_irqsave(&crtc->dev->event_lock, flags);
153 
154 	/* Do the flip (mmio) */
155 	adev->mode_info.funcs->page_flip(adev, work->crtc_id, work->base, work->async);
156 
157 	/* Set the flip status */
158 	amdgpu_crtc->pflip_status = AMDGPU_FLIP_SUBMITTED;
159 	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
160 
161 
162 	drm_dbg_vbl(adev_to_drm(adev),
163 		    "crtc:%d[%p], pflip_stat:AMDGPU_FLIP_SUBMITTED, work: %p,\n",
164 		    amdgpu_crtc->crtc_id, amdgpu_crtc, work);
165 
166 }
167 
168 /*
169  * Handle unpin events outside the interrupt handler proper.
170  */
171 static void amdgpu_display_unpin_work_func(struct work_struct *__work)
172 {
173 	struct amdgpu_flip_work *work =
174 		container_of(__work, struct amdgpu_flip_work, unpin_work);
175 	int r;
176 
177 	/* unpin of the old buffer */
178 	r = amdgpu_bo_reserve(work->old_abo, true);
179 	if (likely(r == 0)) {
180 		amdgpu_bo_unpin(work->old_abo);
181 		amdgpu_bo_unreserve(work->old_abo);
182 	} else
183 		DRM_ERROR("failed to reserve buffer after flip\n");
184 
185 	amdgpu_bo_unref(&work->old_abo);
186 	kfree(work->shared);
187 	kfree(work);
188 }
189 
190 int amdgpu_display_crtc_page_flip_target(struct drm_crtc *crtc,
191 				struct drm_framebuffer *fb,
192 				struct drm_pending_vblank_event *event,
193 				uint32_t page_flip_flags, uint32_t target,
194 				struct drm_modeset_acquire_ctx *ctx)
195 {
196 	struct drm_device *dev = crtc->dev;
197 	struct amdgpu_device *adev = drm_to_adev(dev);
198 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
199 	struct drm_gem_object *obj;
200 	struct amdgpu_flip_work *work;
201 	struct amdgpu_bo *new_abo;
202 	unsigned long flags;
203 	u64 tiling_flags;
204 	int i, r;
205 
206 	work = kzalloc(sizeof(*work), GFP_KERNEL);
207 	if (work == NULL)
208 		return -ENOMEM;
209 
210 	INIT_DELAYED_WORK(&work->flip_work, amdgpu_display_flip_work_func);
211 	INIT_WORK(&work->unpin_work, amdgpu_display_unpin_work_func);
212 
213 	work->event = event;
214 	work->adev = adev;
215 	work->crtc_id = amdgpu_crtc->crtc_id;
216 	work->async = (page_flip_flags & DRM_MODE_PAGE_FLIP_ASYNC) != 0;
217 
218 	/* schedule unpin of the old buffer */
219 	obj = crtc->primary->fb->obj[0];
220 
221 	/* take a reference to the old object */
222 	work->old_abo = gem_to_amdgpu_bo(obj);
223 	amdgpu_bo_ref(work->old_abo);
224 
225 	obj = fb->obj[0];
226 	new_abo = gem_to_amdgpu_bo(obj);
227 
228 	/* pin the new buffer */
229 	r = amdgpu_bo_reserve(new_abo, false);
230 	if (unlikely(r != 0)) {
231 		DRM_ERROR("failed to reserve new abo buffer before flip\n");
232 		goto cleanup;
233 	}
234 
235 	if (!adev->enable_virtual_display) {
236 		r = amdgpu_bo_pin(new_abo,
237 				  amdgpu_display_supported_domains(adev, new_abo->flags));
238 		if (unlikely(r != 0)) {
239 			DRM_ERROR("failed to pin new abo buffer before flip\n");
240 			goto unreserve;
241 		}
242 	}
243 
244 	r = amdgpu_ttm_alloc_gart(&new_abo->tbo);
245 	if (unlikely(r != 0)) {
246 		DRM_ERROR("%p bind failed\n", new_abo);
247 		goto unpin;
248 	}
249 
250 	r = dma_resv_get_fences(new_abo->tbo.base.resv, DMA_RESV_USAGE_WRITE,
251 				&work->shared_count,
252 				&work->shared);
253 	if (unlikely(r != 0)) {
254 		DRM_ERROR("failed to get fences for buffer\n");
255 		goto unpin;
256 	}
257 
258 	amdgpu_bo_get_tiling_flags(new_abo, &tiling_flags);
259 	amdgpu_bo_unreserve(new_abo);
260 
261 	if (!adev->enable_virtual_display)
262 		work->base = amdgpu_bo_gpu_offset(new_abo);
263 	work->target_vblank = target - (uint32_t)drm_crtc_vblank_count(crtc) +
264 		amdgpu_get_vblank_counter_kms(crtc);
265 
266 	/* we borrow the event spin lock for protecting flip_wrok */
267 	spin_lock_irqsave(&crtc->dev->event_lock, flags);
268 	if (amdgpu_crtc->pflip_status != AMDGPU_FLIP_NONE) {
269 		DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
270 		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
271 		r = -EBUSY;
272 		goto pflip_cleanup;
273 	}
274 
275 	amdgpu_crtc->pflip_status = AMDGPU_FLIP_PENDING;
276 	amdgpu_crtc->pflip_works = work;
277 
278 
279 	DRM_DEBUG_DRIVER("crtc:%d[%p], pflip_stat:AMDGPU_FLIP_PENDING, work: %p,\n",
280 					 amdgpu_crtc->crtc_id, amdgpu_crtc, work);
281 	/* update crtc fb */
282 	crtc->primary->fb = fb;
283 	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
284 	amdgpu_display_flip_work_func(&work->flip_work.work);
285 	return 0;
286 
287 pflip_cleanup:
288 	if (unlikely(amdgpu_bo_reserve(new_abo, false) != 0)) {
289 		DRM_ERROR("failed to reserve new abo in error path\n");
290 		goto cleanup;
291 	}
292 unpin:
293 	if (!adev->enable_virtual_display)
294 		amdgpu_bo_unpin(new_abo);
295 
296 unreserve:
297 	amdgpu_bo_unreserve(new_abo);
298 
299 cleanup:
300 	amdgpu_bo_unref(&work->old_abo);
301 	for (i = 0; i < work->shared_count; ++i)
302 		dma_fence_put(work->shared[i]);
303 	kfree(work->shared);
304 	kfree(work);
305 
306 	return r;
307 }
308 
309 int amdgpu_display_crtc_set_config(struct drm_mode_set *set,
310 				   struct drm_modeset_acquire_ctx *ctx)
311 {
312 	struct drm_device *dev;
313 	struct amdgpu_device *adev;
314 	struct drm_crtc *crtc;
315 	bool active = false;
316 	int ret;
317 
318 	if (!set || !set->crtc)
319 		return -EINVAL;
320 
321 	dev = set->crtc->dev;
322 
323 	ret = pm_runtime_get_sync(dev->dev);
324 	if (ret < 0)
325 		goto out;
326 
327 	ret = drm_crtc_helper_set_config(set, ctx);
328 
329 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
330 		if (crtc->enabled)
331 			active = true;
332 
333 	pm_runtime_mark_last_busy(dev->dev);
334 
335 	adev = drm_to_adev(dev);
336 	/* if we have active crtcs and we don't have a power ref,
337 	 * take the current one
338 	 */
339 	if (active && !adev->have_disp_power_ref) {
340 		adev->have_disp_power_ref = true;
341 		return ret;
342 	}
343 	/* if we have no active crtcs, then go to
344 	 * drop the power ref we got before
345 	 */
346 	if (!active && adev->have_disp_power_ref)
347 		adev->have_disp_power_ref = false;
348 out:
349 	/* drop the power reference we got coming in here */
350 	pm_runtime_put_autosuspend(dev->dev);
351 	return ret;
352 }
353 
354 static const char *encoder_names[41] = {
355 	"NONE",
356 	"INTERNAL_LVDS",
357 	"INTERNAL_TMDS1",
358 	"INTERNAL_TMDS2",
359 	"INTERNAL_DAC1",
360 	"INTERNAL_DAC2",
361 	"INTERNAL_SDVOA",
362 	"INTERNAL_SDVOB",
363 	"SI170B",
364 	"CH7303",
365 	"CH7301",
366 	"INTERNAL_DVO1",
367 	"EXTERNAL_SDVOA",
368 	"EXTERNAL_SDVOB",
369 	"TITFP513",
370 	"INTERNAL_LVTM1",
371 	"VT1623",
372 	"HDMI_SI1930",
373 	"HDMI_INTERNAL",
374 	"INTERNAL_KLDSCP_TMDS1",
375 	"INTERNAL_KLDSCP_DVO1",
376 	"INTERNAL_KLDSCP_DAC1",
377 	"INTERNAL_KLDSCP_DAC2",
378 	"SI178",
379 	"MVPU_FPGA",
380 	"INTERNAL_DDI",
381 	"VT1625",
382 	"HDMI_SI1932",
383 	"DP_AN9801",
384 	"DP_DP501",
385 	"INTERNAL_UNIPHY",
386 	"INTERNAL_KLDSCP_LVTMA",
387 	"INTERNAL_UNIPHY1",
388 	"INTERNAL_UNIPHY2",
389 	"NUTMEG",
390 	"TRAVIS",
391 	"INTERNAL_VCE",
392 	"INTERNAL_UNIPHY3",
393 	"HDMI_ANX9805",
394 	"INTERNAL_AMCLK",
395 	"VIRTUAL",
396 };
397 
398 static const char *hpd_names[6] = {
399 	"HPD1",
400 	"HPD2",
401 	"HPD3",
402 	"HPD4",
403 	"HPD5",
404 	"HPD6",
405 };
406 
407 void amdgpu_display_print_display_setup(struct drm_device *dev)
408 {
409 	struct drm_connector *connector;
410 	struct amdgpu_connector *amdgpu_connector;
411 	struct drm_encoder *encoder;
412 	struct amdgpu_encoder *amdgpu_encoder;
413 	struct drm_connector_list_iter iter;
414 	uint32_t devices;
415 	int i = 0;
416 
417 	drm_connector_list_iter_begin(dev, &iter);
418 	DRM_INFO("AMDGPU Display Connectors\n");
419 	drm_for_each_connector_iter(connector, &iter) {
420 		amdgpu_connector = to_amdgpu_connector(connector);
421 		DRM_INFO("Connector %d:\n", i);
422 		DRM_INFO("  %s\n", connector->name);
423 		if (amdgpu_connector->hpd.hpd != AMDGPU_HPD_NONE)
424 			DRM_INFO("  %s\n", hpd_names[amdgpu_connector->hpd.hpd]);
425 		if (amdgpu_connector->ddc_bus) {
426 			DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
427 				 amdgpu_connector->ddc_bus->rec.mask_clk_reg,
428 				 amdgpu_connector->ddc_bus->rec.mask_data_reg,
429 				 amdgpu_connector->ddc_bus->rec.a_clk_reg,
430 				 amdgpu_connector->ddc_bus->rec.a_data_reg,
431 				 amdgpu_connector->ddc_bus->rec.en_clk_reg,
432 				 amdgpu_connector->ddc_bus->rec.en_data_reg,
433 				 amdgpu_connector->ddc_bus->rec.y_clk_reg,
434 				 amdgpu_connector->ddc_bus->rec.y_data_reg);
435 			if (amdgpu_connector->router.ddc_valid)
436 				DRM_INFO("  DDC Router 0x%x/0x%x\n",
437 					 amdgpu_connector->router.ddc_mux_control_pin,
438 					 amdgpu_connector->router.ddc_mux_state);
439 			if (amdgpu_connector->router.cd_valid)
440 				DRM_INFO("  Clock/Data Router 0x%x/0x%x\n",
441 					 amdgpu_connector->router.cd_mux_control_pin,
442 					 amdgpu_connector->router.cd_mux_state);
443 		} else {
444 			if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
445 			    connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
446 			    connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
447 			    connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
448 			    connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
449 			    connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
450 				DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");
451 		}
452 		DRM_INFO("  Encoders:\n");
453 		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
454 			amdgpu_encoder = to_amdgpu_encoder(encoder);
455 			devices = amdgpu_encoder->devices & amdgpu_connector->devices;
456 			if (devices) {
457 				if (devices & ATOM_DEVICE_CRT1_SUPPORT)
458 					DRM_INFO("    CRT1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
459 				if (devices & ATOM_DEVICE_CRT2_SUPPORT)
460 					DRM_INFO("    CRT2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
461 				if (devices & ATOM_DEVICE_LCD1_SUPPORT)
462 					DRM_INFO("    LCD1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
463 				if (devices & ATOM_DEVICE_DFP1_SUPPORT)
464 					DRM_INFO("    DFP1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
465 				if (devices & ATOM_DEVICE_DFP2_SUPPORT)
466 					DRM_INFO("    DFP2: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
467 				if (devices & ATOM_DEVICE_DFP3_SUPPORT)
468 					DRM_INFO("    DFP3: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
469 				if (devices & ATOM_DEVICE_DFP4_SUPPORT)
470 					DRM_INFO("    DFP4: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
471 				if (devices & ATOM_DEVICE_DFP5_SUPPORT)
472 					DRM_INFO("    DFP5: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
473 				if (devices & ATOM_DEVICE_DFP6_SUPPORT)
474 					DRM_INFO("    DFP6: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
475 				if (devices & ATOM_DEVICE_TV1_SUPPORT)
476 					DRM_INFO("    TV1: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
477 				if (devices & ATOM_DEVICE_CV_SUPPORT)
478 					DRM_INFO("    CV: %s\n", encoder_names[amdgpu_encoder->encoder_id]);
479 			}
480 		}
481 		i++;
482 	}
483 	drm_connector_list_iter_end(&iter);
484 }
485 
486 bool amdgpu_display_ddc_probe(struct amdgpu_connector *amdgpu_connector,
487 			      bool use_aux)
488 {
489 	u8 out = 0x0;
490 	u8 buf[8];
491 	int ret;
492 	struct i2c_msg msgs[] = {
493 		{
494 			.addr = DDC_ADDR,
495 			.flags = 0,
496 			.len = 1,
497 			.buf = &out,
498 		},
499 		{
500 			.addr = DDC_ADDR,
501 			.flags = I2C_M_RD,
502 			.len = 8,
503 			.buf = buf,
504 		}
505 	};
506 
507 	/* on hw with routers, select right port */
508 	if (amdgpu_connector->router.ddc_valid)
509 		amdgpu_i2c_router_select_ddc_port(amdgpu_connector);
510 
511 	if (use_aux)
512 		ret = i2c_transfer(&amdgpu_connector->ddc_bus->aux.ddc, msgs, 2);
513 	else
514 		ret = i2c_transfer(&amdgpu_connector->ddc_bus->adapter, msgs, 2);
515 
516 	if (ret != 2)
517 		/* Couldn't find an accessible DDC on this connector */
518 		return false;
519 	/* Probe also for valid EDID header
520 	 * EDID header starts with:
521 	 * 0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00.
522 	 * Only the first 6 bytes must be valid as
523 	 * drm_edid_block_valid() can fix the last 2 bytes
524 	 */
525 	if (drm_edid_header_is_valid(buf) < 6) {
526 		/* Couldn't find an accessible EDID on this
527 		 * connector
528 		 */
529 		return false;
530 	}
531 	return true;
532 }
533 
534 static int amdgpu_dirtyfb(struct drm_framebuffer *fb, struct drm_file *file,
535 			  unsigned int flags, unsigned int color,
536 			  struct drm_clip_rect *clips, unsigned int num_clips)
537 {
538 
539 	if (file)
540 		return -ENOSYS;
541 
542 	return drm_atomic_helper_dirtyfb(fb, file, flags, color, clips,
543 					 num_clips);
544 }
545 
546 static const struct drm_framebuffer_funcs amdgpu_fb_funcs = {
547 	.destroy = drm_gem_fb_destroy,
548 	.create_handle = drm_gem_fb_create_handle,
549 };
550 
551 static const struct drm_framebuffer_funcs amdgpu_fb_funcs_atomic = {
552 	.destroy = drm_gem_fb_destroy,
553 	.create_handle = drm_gem_fb_create_handle,
554 	.dirty = amdgpu_dirtyfb
555 };
556 
557 uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
558 					  uint64_t bo_flags)
559 {
560 	uint32_t domain = AMDGPU_GEM_DOMAIN_VRAM;
561 
562 #if defined(CONFIG_DRM_AMD_DC)
563 	/*
564 	 * if amdgpu_bo_support_uswc returns false it means that USWC mappings
565 	 * is not supported for this board. But this mapping is required
566 	 * to avoid hang caused by placement of scanout BO in GTT on certain
567 	 * APUs. So force the BO placement to VRAM in case this architecture
568 	 * will not allow USWC mappings.
569 	 * Also, don't allow GTT domain if the BO doesn't have USWC flag set.
570 	 */
571 	if ((bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) &&
572 	    amdgpu_bo_support_uswc(bo_flags) &&
573 	    adev->dc_enabled &&
574 	    adev->mode_info.gpu_vm_support)
575 		domain |= AMDGPU_GEM_DOMAIN_GTT;
576 #endif
577 
578 	return domain;
579 }
580 
581 static const struct drm_format_info dcc_formats[] = {
582 	{ .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 2,
583 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
584 	 { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 2,
585 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
586 	{ .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 2,
587 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
588 	   .has_alpha = true, },
589 	{ .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 2,
590 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
591 	  .has_alpha = true, },
592 	{ .format = DRM_FORMAT_BGRA8888, .depth = 32, .num_planes = 2,
593 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
594 	  .has_alpha = true, },
595 	{ .format = DRM_FORMAT_XRGB2101010, .depth = 30, .num_planes = 2,
596 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
597 	{ .format = DRM_FORMAT_XBGR2101010, .depth = 30, .num_planes = 2,
598 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
599 	{ .format = DRM_FORMAT_ARGB2101010, .depth = 30, .num_planes = 2,
600 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
601 	  .has_alpha = true, },
602 	{ .format = DRM_FORMAT_ABGR2101010, .depth = 30, .num_planes = 2,
603 	  .cpp = { 4, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
604 	  .has_alpha = true, },
605 	{ .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 2,
606 	  .cpp = { 2, 0, }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
607 };
608 
609 static const struct drm_format_info dcc_retile_formats[] = {
610 	{ .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 3,
611 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
612 	 { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 3,
613 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
614 	{ .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 3,
615 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
616 	   .has_alpha = true, },
617 	{ .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 3,
618 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
619 	  .has_alpha = true, },
620 	{ .format = DRM_FORMAT_BGRA8888, .depth = 32, .num_planes = 3,
621 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
622 	  .has_alpha = true, },
623 	{ .format = DRM_FORMAT_XRGB2101010, .depth = 30, .num_planes = 3,
624 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
625 	{ .format = DRM_FORMAT_XBGR2101010, .depth = 30, .num_planes = 3,
626 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
627 	{ .format = DRM_FORMAT_ARGB2101010, .depth = 30, .num_planes = 3,
628 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
629 	  .has_alpha = true, },
630 	{ .format = DRM_FORMAT_ABGR2101010, .depth = 30, .num_planes = 3,
631 	  .cpp = { 4, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1,
632 	  .has_alpha = true, },
633 	{ .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 3,
634 	  .cpp = { 2, 0, 0 }, .block_w = {1, 1, 1}, .block_h = {1, 1, 1}, .hsub = 1, .vsub = 1, },
635 };
636 
637 static const struct drm_format_info *
638 lookup_format_info(const struct drm_format_info formats[],
639 		  int num_formats, u32 format)
640 {
641 	int i;
642 
643 	for (i = 0; i < num_formats; i++) {
644 		if (formats[i].format == format)
645 			return &formats[i];
646 	}
647 
648 	return NULL;
649 }
650 
651 const struct drm_format_info *
652 amdgpu_lookup_format_info(u32 format, uint64_t modifier)
653 {
654 	if (!IS_AMD_FMT_MOD(modifier))
655 		return NULL;
656 
657 	if (AMD_FMT_MOD_GET(DCC_RETILE, modifier))
658 		return lookup_format_info(dcc_retile_formats,
659 					  ARRAY_SIZE(dcc_retile_formats),
660 					  format);
661 
662 	if (AMD_FMT_MOD_GET(DCC, modifier))
663 		return lookup_format_info(dcc_formats, ARRAY_SIZE(dcc_formats),
664 					  format);
665 
666 	/* returning NULL will cause the default format structs to be used. */
667 	return NULL;
668 }
669 
670 
671 /*
672  * Tries to extract the renderable DCC offset from the opaque metadata attached
673  * to the buffer.
674  */
675 static int
676 extract_render_dcc_offset(struct amdgpu_device *adev,
677 			  struct drm_gem_object *obj,
678 			  uint64_t *offset)
679 {
680 	struct amdgpu_bo *rbo;
681 	int r = 0;
682 	uint32_t metadata[10]; /* Something that fits a descriptor + header. */
683 	uint32_t size;
684 
685 	rbo = gem_to_amdgpu_bo(obj);
686 	r = amdgpu_bo_reserve(rbo, false);
687 
688 	if (unlikely(r)) {
689 		/* Don't show error message when returning -ERESTARTSYS */
690 		if (r != -ERESTARTSYS)
691 			DRM_ERROR("Unable to reserve buffer: %d\n", r);
692 		return r;
693 	}
694 
695 	r = amdgpu_bo_get_metadata(rbo, metadata, sizeof(metadata), &size, NULL);
696 	amdgpu_bo_unreserve(rbo);
697 
698 	if (r)
699 		return r;
700 
701 	/*
702 	 * The first word is the metadata version, and we need space for at least
703 	 * the version + pci vendor+device id + 8 words for a descriptor.
704 	 */
705 	if (size < 40  || metadata[0] != 1)
706 		return -EINVAL;
707 
708 	if (adev->family >= AMDGPU_FAMILY_NV) {
709 		/* resource word 6/7 META_DATA_ADDRESS{_LO} */
710 		*offset = ((u64)metadata[9] << 16u) |
711 			  ((metadata[8] & 0xFF000000u) >> 16);
712 	} else {
713 		/* resource word 5/7 META_DATA_ADDRESS */
714 		*offset = ((u64)metadata[9] << 8u) |
715 			  ((u64)(metadata[7] & 0x1FE0000u) << 23);
716 	}
717 
718 	return 0;
719 }
720 
721 static int convert_tiling_flags_to_modifier(struct amdgpu_framebuffer *afb)
722 {
723 	struct amdgpu_device *adev = drm_to_adev(afb->base.dev);
724 	uint64_t modifier = 0;
725 	int num_pipes = 0;
726 	int num_pkrs = 0;
727 
728 	num_pkrs = adev->gfx.config.gb_addr_config_fields.num_pkrs;
729 	num_pipes = adev->gfx.config.gb_addr_config_fields.num_pipes;
730 
731 	if (!afb->tiling_flags || !AMDGPU_TILING_GET(afb->tiling_flags, SWIZZLE_MODE)) {
732 		modifier = DRM_FORMAT_MOD_LINEAR;
733 	} else {
734 		int swizzle = AMDGPU_TILING_GET(afb->tiling_flags, SWIZZLE_MODE);
735 		bool has_xor = swizzle >= 16;
736 		int block_size_bits;
737 		int version;
738 		int pipe_xor_bits = 0;
739 		int bank_xor_bits = 0;
740 		int packers = 0;
741 		int rb = 0;
742 		int pipes = ilog2(num_pipes);
743 		uint32_t dcc_offset = AMDGPU_TILING_GET(afb->tiling_flags, DCC_OFFSET_256B);
744 
745 		switch (swizzle >> 2) {
746 		case 0: /* 256B */
747 			block_size_bits = 8;
748 			break;
749 		case 1: /* 4KiB */
750 		case 5: /* 4KiB _X */
751 			block_size_bits = 12;
752 			break;
753 		case 2: /* 64KiB */
754 		case 4: /* 64 KiB _T */
755 		case 6: /* 64 KiB _X */
756 			block_size_bits = 16;
757 			break;
758 		case 7: /* 256 KiB */
759 			block_size_bits = 18;
760 			break;
761 		default:
762 			/* RESERVED or VAR */
763 			return -EINVAL;
764 		}
765 
766 		if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(11, 0, 0))
767 			version = AMD_FMT_MOD_TILE_VER_GFX11;
768 		else if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(10, 3, 0))
769 			version = AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS;
770 		else if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(10, 0, 0))
771 			version = AMD_FMT_MOD_TILE_VER_GFX10;
772 		else
773 			version = AMD_FMT_MOD_TILE_VER_GFX9;
774 
775 		switch (swizzle & 3) {
776 		case 0: /* Z microtiling */
777 			return -EINVAL;
778 		case 1: /* S microtiling */
779 			if (adev->ip_versions[GC_HWIP][0] < IP_VERSION(11, 0, 0)) {
780 				if (!has_xor)
781 					version = AMD_FMT_MOD_TILE_VER_GFX9;
782 			}
783 			break;
784 		case 2:
785 			if (adev->ip_versions[GC_HWIP][0] < IP_VERSION(11, 0, 0)) {
786 				if (!has_xor && afb->base.format->cpp[0] != 4)
787 					version = AMD_FMT_MOD_TILE_VER_GFX9;
788 			}
789 			break;
790 		case 3:
791 			break;
792 		}
793 
794 		if (has_xor) {
795 			if (num_pipes == num_pkrs && num_pkrs == 0) {
796 				DRM_ERROR("invalid number of pipes and packers\n");
797 				return -EINVAL;
798 			}
799 
800 			switch (version) {
801 			case AMD_FMT_MOD_TILE_VER_GFX11:
802 				pipe_xor_bits = min(block_size_bits - 8, pipes);
803 				packers = ilog2(adev->gfx.config.gb_addr_config_fields.num_pkrs);
804 				break;
805 			case AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS:
806 				pipe_xor_bits = min(block_size_bits - 8, pipes);
807 				packers = min(block_size_bits - 8 - pipe_xor_bits,
808 					      ilog2(adev->gfx.config.gb_addr_config_fields.num_pkrs));
809 				break;
810 			case AMD_FMT_MOD_TILE_VER_GFX10:
811 				pipe_xor_bits = min(block_size_bits - 8, pipes);
812 				break;
813 			case AMD_FMT_MOD_TILE_VER_GFX9:
814 				rb = ilog2(adev->gfx.config.gb_addr_config_fields.num_se) +
815 				     ilog2(adev->gfx.config.gb_addr_config_fields.num_rb_per_se);
816 				pipe_xor_bits = min(block_size_bits - 8, pipes +
817 						    ilog2(adev->gfx.config.gb_addr_config_fields.num_se));
818 				bank_xor_bits = min(block_size_bits - 8 - pipe_xor_bits,
819 						    ilog2(adev->gfx.config.gb_addr_config_fields.num_banks));
820 				break;
821 			}
822 		}
823 
824 		modifier = AMD_FMT_MOD |
825 			   AMD_FMT_MOD_SET(TILE, AMDGPU_TILING_GET(afb->tiling_flags, SWIZZLE_MODE)) |
826 			   AMD_FMT_MOD_SET(TILE_VERSION, version) |
827 			   AMD_FMT_MOD_SET(PIPE_XOR_BITS, pipe_xor_bits) |
828 			   AMD_FMT_MOD_SET(BANK_XOR_BITS, bank_xor_bits) |
829 			   AMD_FMT_MOD_SET(PACKERS, packers);
830 
831 		if (dcc_offset != 0) {
832 			bool dcc_i64b = AMDGPU_TILING_GET(afb->tiling_flags, DCC_INDEPENDENT_64B) != 0;
833 			bool dcc_i128b = version >= AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS;
834 			const struct drm_format_info *format_info;
835 			u64 render_dcc_offset;
836 
837 			/* Enable constant encode on RAVEN2 and later. */
838 			bool dcc_constant_encode = (adev->asic_type > CHIP_RAVEN ||
839 						   (adev->asic_type == CHIP_RAVEN &&
840 						    adev->external_rev_id >= 0x81)) &&
841 						    adev->ip_versions[GC_HWIP][0] < IP_VERSION(11, 0, 0);
842 
843 			int max_cblock_size = dcc_i64b ? AMD_FMT_MOD_DCC_BLOCK_64B :
844 					      dcc_i128b ? AMD_FMT_MOD_DCC_BLOCK_128B :
845 					      AMD_FMT_MOD_DCC_BLOCK_256B;
846 
847 			modifier |= AMD_FMT_MOD_SET(DCC, 1) |
848 				    AMD_FMT_MOD_SET(DCC_CONSTANT_ENCODE, dcc_constant_encode) |
849 				    AMD_FMT_MOD_SET(DCC_INDEPENDENT_64B, dcc_i64b) |
850 				    AMD_FMT_MOD_SET(DCC_INDEPENDENT_128B, dcc_i128b) |
851 				    AMD_FMT_MOD_SET(DCC_MAX_COMPRESSED_BLOCK, max_cblock_size);
852 
853 			afb->base.offsets[1] = dcc_offset * 256 + afb->base.offsets[0];
854 			afb->base.pitches[1] =
855 				AMDGPU_TILING_GET(afb->tiling_flags, DCC_PITCH_MAX) + 1;
856 
857 			/*
858 			 * If the userspace driver uses retiling the tiling flags do not contain
859 			 * info on the renderable DCC buffer. Luckily the opaque metadata contains
860 			 * the info so we can try to extract it. The kernel does not use this info
861 			 * but we should convert it to a modifier plane for getfb2, so the
862 			 * userspace driver that gets it doesn't have to juggle around another DCC
863 			 * plane internally.
864 			 */
865 			if (extract_render_dcc_offset(adev, afb->base.obj[0],
866 						      &render_dcc_offset) == 0 &&
867 			    render_dcc_offset != 0 &&
868 			    render_dcc_offset != afb->base.offsets[1] &&
869 			    render_dcc_offset < UINT_MAX) {
870 				uint32_t dcc_block_bits;  /* of base surface data */
871 
872 				modifier |= AMD_FMT_MOD_SET(DCC_RETILE, 1);
873 				afb->base.offsets[2] = render_dcc_offset;
874 
875 				if (adev->family >= AMDGPU_FAMILY_NV) {
876 					int extra_pipe = 0;
877 
878 					if ((adev->ip_versions[GC_HWIP][0] >= IP_VERSION(10, 3, 0)) &&
879 					    pipes == packers && pipes > 1)
880 						extra_pipe = 1;
881 
882 					dcc_block_bits = max(20, 16 + pipes + extra_pipe);
883 				} else {
884 					modifier |= AMD_FMT_MOD_SET(RB, rb) |
885 						    AMD_FMT_MOD_SET(PIPE, pipes);
886 					dcc_block_bits = max(20, 18 + rb);
887 				}
888 
889 				dcc_block_bits -= ilog2(afb->base.format->cpp[0]);
890 				afb->base.pitches[2] = ALIGN(afb->base.width,
891 							     1u << ((dcc_block_bits + 1) / 2));
892 			}
893 			format_info = amdgpu_lookup_format_info(afb->base.format->format,
894 								modifier);
895 			if (!format_info)
896 				return -EINVAL;
897 
898 			afb->base.format = format_info;
899 		}
900 	}
901 
902 	afb->base.modifier = modifier;
903 	afb->base.flags |= DRM_MODE_FB_MODIFIERS;
904 	return 0;
905 }
906 
907 /* Mirrors the is_displayable check in radeonsi's gfx6_compute_surface */
908 static int check_tiling_flags_gfx6(struct amdgpu_framebuffer *afb)
909 {
910 	u64 micro_tile_mode;
911 
912 	/* Zero swizzle mode means linear */
913 	if (AMDGPU_TILING_GET(afb->tiling_flags, SWIZZLE_MODE) == 0)
914 		return 0;
915 
916 	micro_tile_mode = AMDGPU_TILING_GET(afb->tiling_flags, MICRO_TILE_MODE);
917 	switch (micro_tile_mode) {
918 	case 0: /* DISPLAY */
919 	case 3: /* RENDER */
920 		return 0;
921 	default:
922 		drm_dbg_kms(afb->base.dev,
923 			    "Micro tile mode %llu not supported for scanout\n",
924 			    micro_tile_mode);
925 		return -EINVAL;
926 	}
927 }
928 
929 static void get_block_dimensions(unsigned int block_log2, unsigned int cpp,
930 				 unsigned int *width, unsigned int *height)
931 {
932 	unsigned int cpp_log2 = ilog2(cpp);
933 	unsigned int pixel_log2 = block_log2 - cpp_log2;
934 	unsigned int width_log2 = (pixel_log2 + 1) / 2;
935 	unsigned int height_log2 = pixel_log2 - width_log2;
936 
937 	*width = 1 << width_log2;
938 	*height = 1 << height_log2;
939 }
940 
941 static unsigned int get_dcc_block_size(uint64_t modifier, bool rb_aligned,
942 				       bool pipe_aligned)
943 {
944 	unsigned int ver = AMD_FMT_MOD_GET(TILE_VERSION, modifier);
945 
946 	switch (ver) {
947 	case AMD_FMT_MOD_TILE_VER_GFX9: {
948 		/*
949 		 * TODO: for pipe aligned we may need to check the alignment of the
950 		 * total size of the surface, which may need to be bigger than the
951 		 * natural alignment due to some HW workarounds
952 		 */
953 		return max(10 + (rb_aligned ? (int)AMD_FMT_MOD_GET(RB, modifier) : 0), 12);
954 	}
955 	case AMD_FMT_MOD_TILE_VER_GFX10:
956 	case AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS:
957 	case AMD_FMT_MOD_TILE_VER_GFX11: {
958 		int pipes_log2 = AMD_FMT_MOD_GET(PIPE_XOR_BITS, modifier);
959 
960 		if (ver >= AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS && pipes_log2 > 1 &&
961 		    AMD_FMT_MOD_GET(PACKERS, modifier) == pipes_log2)
962 			++pipes_log2;
963 
964 		return max(8 + (pipe_aligned ? pipes_log2 : 0), 12);
965 	}
966 	default:
967 		return 0;
968 	}
969 }
970 
971 static int amdgpu_display_verify_plane(struct amdgpu_framebuffer *rfb, int plane,
972 				       const struct drm_format_info *format,
973 				       unsigned int block_width, unsigned int block_height,
974 				       unsigned int block_size_log2)
975 {
976 	unsigned int width = rfb->base.width /
977 		((plane && plane < format->num_planes) ? format->hsub : 1);
978 	unsigned int height = rfb->base.height /
979 		((plane && plane < format->num_planes) ? format->vsub : 1);
980 	unsigned int cpp = plane < format->num_planes ? format->cpp[plane] : 1;
981 	unsigned int block_pitch = block_width * cpp;
982 	unsigned int min_pitch = ALIGN(width * cpp, block_pitch);
983 	unsigned int block_size = 1 << block_size_log2;
984 	uint64_t size;
985 
986 	if (rfb->base.pitches[plane] % block_pitch) {
987 		drm_dbg_kms(rfb->base.dev,
988 			    "pitch %d for plane %d is not a multiple of block pitch %d\n",
989 			    rfb->base.pitches[plane], plane, block_pitch);
990 		return -EINVAL;
991 	}
992 	if (rfb->base.pitches[plane] < min_pitch) {
993 		drm_dbg_kms(rfb->base.dev,
994 			    "pitch %d for plane %d is less than minimum pitch %d\n",
995 			    rfb->base.pitches[plane], plane, min_pitch);
996 		return -EINVAL;
997 	}
998 
999 	/* Force at least natural alignment. */
1000 	if (rfb->base.offsets[plane] % block_size) {
1001 		drm_dbg_kms(rfb->base.dev,
1002 			    "offset 0x%x for plane %d is not a multiple of block pitch 0x%x\n",
1003 			    rfb->base.offsets[plane], plane, block_size);
1004 		return -EINVAL;
1005 	}
1006 
1007 	size = rfb->base.offsets[plane] +
1008 		(uint64_t)rfb->base.pitches[plane] / block_pitch *
1009 		block_size * DIV_ROUND_UP(height, block_height);
1010 
1011 	if (rfb->base.obj[0]->size < size) {
1012 		drm_dbg_kms(rfb->base.dev,
1013 			    "BO size 0x%zx is less than 0x%llx required for plane %d\n",
1014 			    rfb->base.obj[0]->size, size, plane);
1015 		return -EINVAL;
1016 	}
1017 
1018 	return 0;
1019 }
1020 
1021 
1022 static int amdgpu_display_verify_sizes(struct amdgpu_framebuffer *rfb)
1023 {
1024 	const struct drm_format_info *format_info = drm_format_info(rfb->base.format->format);
1025 	uint64_t modifier = rfb->base.modifier;
1026 	int ret;
1027 	unsigned int i, block_width, block_height, block_size_log2;
1028 
1029 	if (rfb->base.dev->mode_config.fb_modifiers_not_supported)
1030 		return 0;
1031 
1032 	for (i = 0; i < format_info->num_planes; ++i) {
1033 		if (modifier == DRM_FORMAT_MOD_LINEAR) {
1034 			block_width = 256 / format_info->cpp[i];
1035 			block_height = 1;
1036 			block_size_log2 = 8;
1037 		} else {
1038 			int swizzle = AMD_FMT_MOD_GET(TILE, modifier);
1039 
1040 			switch ((swizzle & ~3) + 1) {
1041 			case DC_SW_256B_S:
1042 				block_size_log2 = 8;
1043 				break;
1044 			case DC_SW_4KB_S:
1045 			case DC_SW_4KB_S_X:
1046 				block_size_log2 = 12;
1047 				break;
1048 			case DC_SW_64KB_S:
1049 			case DC_SW_64KB_S_T:
1050 			case DC_SW_64KB_S_X:
1051 				block_size_log2 = 16;
1052 				break;
1053 			case DC_SW_VAR_S_X:
1054 				block_size_log2 = 18;
1055 				break;
1056 			default:
1057 				drm_dbg_kms(rfb->base.dev,
1058 					    "Swizzle mode with unknown block size: %d\n", swizzle);
1059 				return -EINVAL;
1060 			}
1061 
1062 			get_block_dimensions(block_size_log2, format_info->cpp[i],
1063 					     &block_width, &block_height);
1064 		}
1065 
1066 		ret = amdgpu_display_verify_plane(rfb, i, format_info,
1067 						  block_width, block_height, block_size_log2);
1068 		if (ret)
1069 			return ret;
1070 	}
1071 
1072 	if (AMD_FMT_MOD_GET(DCC, modifier)) {
1073 		if (AMD_FMT_MOD_GET(DCC_RETILE, modifier)) {
1074 			block_size_log2 = get_dcc_block_size(modifier, false, false);
1075 			get_block_dimensions(block_size_log2 + 8, format_info->cpp[0],
1076 					     &block_width, &block_height);
1077 			ret = amdgpu_display_verify_plane(rfb, i, format_info,
1078 							  block_width, block_height,
1079 							  block_size_log2);
1080 			if (ret)
1081 				return ret;
1082 
1083 			++i;
1084 			block_size_log2 = get_dcc_block_size(modifier, true, true);
1085 		} else {
1086 			bool pipe_aligned = AMD_FMT_MOD_GET(DCC_PIPE_ALIGN, modifier);
1087 
1088 			block_size_log2 = get_dcc_block_size(modifier, true, pipe_aligned);
1089 		}
1090 		get_block_dimensions(block_size_log2 + 8, format_info->cpp[0],
1091 				     &block_width, &block_height);
1092 		ret = amdgpu_display_verify_plane(rfb, i, format_info,
1093 						  block_width, block_height, block_size_log2);
1094 		if (ret)
1095 			return ret;
1096 	}
1097 
1098 	return 0;
1099 }
1100 
1101 static int amdgpu_display_get_fb_info(const struct amdgpu_framebuffer *amdgpu_fb,
1102 				      uint64_t *tiling_flags, bool *tmz_surface)
1103 {
1104 	struct amdgpu_bo *rbo;
1105 	int r;
1106 
1107 	if (!amdgpu_fb) {
1108 		*tiling_flags = 0;
1109 		*tmz_surface = false;
1110 		return 0;
1111 	}
1112 
1113 	rbo = gem_to_amdgpu_bo(amdgpu_fb->base.obj[0]);
1114 	r = amdgpu_bo_reserve(rbo, false);
1115 
1116 	if (unlikely(r)) {
1117 		/* Don't show error message when returning -ERESTARTSYS */
1118 		if (r != -ERESTARTSYS)
1119 			DRM_ERROR("Unable to reserve buffer: %d\n", r);
1120 		return r;
1121 	}
1122 
1123 	if (tiling_flags)
1124 		amdgpu_bo_get_tiling_flags(rbo, tiling_flags);
1125 
1126 	if (tmz_surface)
1127 		*tmz_surface = amdgpu_bo_encrypted(rbo);
1128 
1129 	amdgpu_bo_unreserve(rbo);
1130 
1131 	return r;
1132 }
1133 
1134 static int amdgpu_display_gem_fb_verify_and_init(struct drm_device *dev,
1135 						 struct amdgpu_framebuffer *rfb,
1136 						 struct drm_file *file_priv,
1137 						 const struct drm_mode_fb_cmd2 *mode_cmd,
1138 						 struct drm_gem_object *obj)
1139 {
1140 	int ret;
1141 
1142 	rfb->base.obj[0] = obj;
1143 	drm_helper_mode_fill_fb_struct(dev, &rfb->base, mode_cmd);
1144 	/* Verify that the modifier is supported. */
1145 	if (!drm_any_plane_has_format(dev, mode_cmd->pixel_format,
1146 				      mode_cmd->modifier[0])) {
1147 		drm_dbg_kms(dev,
1148 			    "unsupported pixel format %p4cc / modifier 0x%llx\n",
1149 			    &mode_cmd->pixel_format, mode_cmd->modifier[0]);
1150 
1151 		ret = -EINVAL;
1152 		goto err;
1153 	}
1154 
1155 	ret = amdgpu_display_framebuffer_init(dev, rfb, mode_cmd, obj);
1156 	if (ret)
1157 		goto err;
1158 
1159 	if (drm_drv_uses_atomic_modeset(dev))
1160 		ret = drm_framebuffer_init(dev, &rfb->base,
1161 					   &amdgpu_fb_funcs_atomic);
1162 	else
1163 		ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
1164 
1165 	if (ret)
1166 		goto err;
1167 
1168 	return 0;
1169 err:
1170 	drm_dbg_kms(dev, "Failed to verify and init gem fb: %d\n", ret);
1171 	rfb->base.obj[0] = NULL;
1172 	return ret;
1173 }
1174 
1175 static int amdgpu_display_framebuffer_init(struct drm_device *dev,
1176 					   struct amdgpu_framebuffer *rfb,
1177 					   const struct drm_mode_fb_cmd2 *mode_cmd,
1178 					   struct drm_gem_object *obj)
1179 {
1180 	struct amdgpu_device *adev = drm_to_adev(dev);
1181 	int ret, i;
1182 
1183 	/*
1184 	 * This needs to happen before modifier conversion as that might change
1185 	 * the number of planes.
1186 	 */
1187 	for (i = 1; i < rfb->base.format->num_planes; ++i) {
1188 		if (mode_cmd->handles[i] != mode_cmd->handles[0]) {
1189 			drm_dbg_kms(dev, "Plane 0 and %d have different BOs: %u vs. %u\n",
1190 				    i, mode_cmd->handles[0], mode_cmd->handles[i]);
1191 			ret = -EINVAL;
1192 			return ret;
1193 		}
1194 	}
1195 
1196 	ret = amdgpu_display_get_fb_info(rfb, &rfb->tiling_flags, &rfb->tmz_surface);
1197 	if (ret)
1198 		return ret;
1199 
1200 	if (dev->mode_config.fb_modifiers_not_supported && !adev->enable_virtual_display) {
1201 		drm_WARN_ONCE(dev, adev->family >= AMDGPU_FAMILY_AI,
1202 			      "GFX9+ requires FB check based on format modifier\n");
1203 		ret = check_tiling_flags_gfx6(rfb);
1204 		if (ret)
1205 			return ret;
1206 	}
1207 
1208 	if (!dev->mode_config.fb_modifiers_not_supported &&
1209 	    !(rfb->base.flags & DRM_MODE_FB_MODIFIERS)) {
1210 		ret = convert_tiling_flags_to_modifier(rfb);
1211 		if (ret) {
1212 			drm_dbg_kms(dev, "Failed to convert tiling flags 0x%llX to a modifier",
1213 				    rfb->tiling_flags);
1214 			return ret;
1215 		}
1216 	}
1217 
1218 	ret = amdgpu_display_verify_sizes(rfb);
1219 	if (ret)
1220 		return ret;
1221 
1222 	for (i = 0; i < rfb->base.format->num_planes; ++i) {
1223 		drm_gem_object_get(rfb->base.obj[0]);
1224 		rfb->base.obj[i] = rfb->base.obj[0];
1225 	}
1226 
1227 	return 0;
1228 }
1229 
1230 struct drm_framebuffer *
1231 amdgpu_display_user_framebuffer_create(struct drm_device *dev,
1232 				       struct drm_file *file_priv,
1233 				       const struct drm_mode_fb_cmd2 *mode_cmd)
1234 {
1235 	struct amdgpu_framebuffer *amdgpu_fb;
1236 	struct drm_gem_object *obj;
1237 	struct amdgpu_bo *bo;
1238 	uint32_t domains;
1239 	int ret;
1240 
1241 	obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
1242 	if (obj ==  NULL) {
1243 		drm_dbg_kms(dev,
1244 			    "No GEM object associated to handle 0x%08X, can't create framebuffer\n",
1245 			    mode_cmd->handles[0]);
1246 
1247 		return ERR_PTR(-ENOENT);
1248 	}
1249 
1250 	/* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */
1251 	bo = gem_to_amdgpu_bo(obj);
1252 	domains = amdgpu_display_supported_domains(drm_to_adev(dev), bo->flags);
1253 	if (obj->import_attach && !(domains & AMDGPU_GEM_DOMAIN_GTT)) {
1254 		drm_dbg_kms(dev, "Cannot create framebuffer from imported dma_buf\n");
1255 		drm_gem_object_put(obj);
1256 		return ERR_PTR(-EINVAL);
1257 	}
1258 
1259 	amdgpu_fb = kzalloc(sizeof(*amdgpu_fb), GFP_KERNEL);
1260 	if (amdgpu_fb == NULL) {
1261 		drm_gem_object_put(obj);
1262 		return ERR_PTR(-ENOMEM);
1263 	}
1264 
1265 	ret = amdgpu_display_gem_fb_verify_and_init(dev, amdgpu_fb, file_priv,
1266 						    mode_cmd, obj);
1267 	if (ret) {
1268 		kfree(amdgpu_fb);
1269 		drm_gem_object_put(obj);
1270 		return ERR_PTR(ret);
1271 	}
1272 
1273 	drm_gem_object_put(obj);
1274 	return &amdgpu_fb->base;
1275 }
1276 
1277 const struct drm_mode_config_funcs amdgpu_mode_funcs = {
1278 	.fb_create = amdgpu_display_user_framebuffer_create,
1279 };
1280 
1281 static const struct drm_prop_enum_list amdgpu_underscan_enum_list[] = {
1282 	{ UNDERSCAN_OFF, "off" },
1283 	{ UNDERSCAN_ON, "on" },
1284 	{ UNDERSCAN_AUTO, "auto" },
1285 };
1286 
1287 static const struct drm_prop_enum_list amdgpu_audio_enum_list[] = {
1288 	{ AMDGPU_AUDIO_DISABLE, "off" },
1289 	{ AMDGPU_AUDIO_ENABLE, "on" },
1290 	{ AMDGPU_AUDIO_AUTO, "auto" },
1291 };
1292 
1293 /* XXX support different dither options? spatial, temporal, both, etc. */
1294 static const struct drm_prop_enum_list amdgpu_dither_enum_list[] = {
1295 	{ AMDGPU_FMT_DITHER_DISABLE, "off" },
1296 	{ AMDGPU_FMT_DITHER_ENABLE, "on" },
1297 };
1298 
1299 int amdgpu_display_modeset_create_props(struct amdgpu_device *adev)
1300 {
1301 	int sz;
1302 
1303 	adev->mode_info.coherent_mode_property =
1304 		drm_property_create_range(adev_to_drm(adev), 0, "coherent", 0, 1);
1305 	if (!adev->mode_info.coherent_mode_property)
1306 		return -ENOMEM;
1307 
1308 	adev->mode_info.load_detect_property =
1309 		drm_property_create_range(adev_to_drm(adev), 0, "load detection", 0, 1);
1310 	if (!adev->mode_info.load_detect_property)
1311 		return -ENOMEM;
1312 
1313 	drm_mode_create_scaling_mode_property(adev_to_drm(adev));
1314 
1315 	sz = ARRAY_SIZE(amdgpu_underscan_enum_list);
1316 	adev->mode_info.underscan_property =
1317 		drm_property_create_enum(adev_to_drm(adev), 0,
1318 					 "underscan",
1319 					 amdgpu_underscan_enum_list, sz);
1320 
1321 	adev->mode_info.underscan_hborder_property =
1322 		drm_property_create_range(adev_to_drm(adev), 0,
1323 					  "underscan hborder", 0, 128);
1324 	if (!adev->mode_info.underscan_hborder_property)
1325 		return -ENOMEM;
1326 
1327 	adev->mode_info.underscan_vborder_property =
1328 		drm_property_create_range(adev_to_drm(adev), 0,
1329 					  "underscan vborder", 0, 128);
1330 	if (!adev->mode_info.underscan_vborder_property)
1331 		return -ENOMEM;
1332 
1333 	sz = ARRAY_SIZE(amdgpu_audio_enum_list);
1334 	adev->mode_info.audio_property =
1335 		drm_property_create_enum(adev_to_drm(adev), 0,
1336 					 "audio",
1337 					 amdgpu_audio_enum_list, sz);
1338 
1339 	sz = ARRAY_SIZE(amdgpu_dither_enum_list);
1340 	adev->mode_info.dither_property =
1341 		drm_property_create_enum(adev_to_drm(adev), 0,
1342 					 "dither",
1343 					 amdgpu_dither_enum_list, sz);
1344 
1345 	if (adev->dc_enabled) {
1346 		adev->mode_info.abm_level_property =
1347 			drm_property_create_range(adev_to_drm(adev), 0,
1348 						  "abm level", 0, 4);
1349 		if (!adev->mode_info.abm_level_property)
1350 			return -ENOMEM;
1351 	}
1352 
1353 	return 0;
1354 }
1355 
1356 void amdgpu_display_update_priority(struct amdgpu_device *adev)
1357 {
1358 	/* adjustment options for the display watermarks */
1359 	if ((amdgpu_disp_priority == 0) || (amdgpu_disp_priority > 2))
1360 		adev->mode_info.disp_priority = 0;
1361 	else
1362 		adev->mode_info.disp_priority = amdgpu_disp_priority;
1363 
1364 }
1365 
1366 static bool amdgpu_display_is_hdtv_mode(const struct drm_display_mode *mode)
1367 {
1368 	/* try and guess if this is a tv or a monitor */
1369 	if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
1370 	    (mode->vdisplay == 576) || /* 576p */
1371 	    (mode->vdisplay == 720) || /* 720p */
1372 	    (mode->vdisplay == 1080)) /* 1080p */
1373 		return true;
1374 	else
1375 		return false;
1376 }
1377 
1378 bool amdgpu_display_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
1379 					const struct drm_display_mode *mode,
1380 					struct drm_display_mode *adjusted_mode)
1381 {
1382 	struct drm_device *dev = crtc->dev;
1383 	struct drm_encoder *encoder;
1384 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
1385 	struct amdgpu_encoder *amdgpu_encoder;
1386 	struct drm_connector *connector;
1387 	u32 src_v = 1, dst_v = 1;
1388 	u32 src_h = 1, dst_h = 1;
1389 
1390 	amdgpu_crtc->h_border = 0;
1391 	amdgpu_crtc->v_border = 0;
1392 
1393 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1394 		if (encoder->crtc != crtc)
1395 			continue;
1396 		amdgpu_encoder = to_amdgpu_encoder(encoder);
1397 		connector = amdgpu_get_connector_for_encoder(encoder);
1398 
1399 		/* set scaling */
1400 		if (amdgpu_encoder->rmx_type == RMX_OFF)
1401 			amdgpu_crtc->rmx_type = RMX_OFF;
1402 		else if (mode->hdisplay < amdgpu_encoder->native_mode.hdisplay ||
1403 			 mode->vdisplay < amdgpu_encoder->native_mode.vdisplay)
1404 			amdgpu_crtc->rmx_type = amdgpu_encoder->rmx_type;
1405 		else
1406 			amdgpu_crtc->rmx_type = RMX_OFF;
1407 		/* copy native mode */
1408 		memcpy(&amdgpu_crtc->native_mode,
1409 		       &amdgpu_encoder->native_mode,
1410 		       sizeof(struct drm_display_mode));
1411 		src_v = crtc->mode.vdisplay;
1412 		dst_v = amdgpu_crtc->native_mode.vdisplay;
1413 		src_h = crtc->mode.hdisplay;
1414 		dst_h = amdgpu_crtc->native_mode.hdisplay;
1415 
1416 		/* fix up for overscan on hdmi */
1417 		if ((!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
1418 		    ((amdgpu_encoder->underscan_type == UNDERSCAN_ON) ||
1419 		     ((amdgpu_encoder->underscan_type == UNDERSCAN_AUTO) &&
1420 		      connector->display_info.is_hdmi &&
1421 		      amdgpu_display_is_hdtv_mode(mode)))) {
1422 			if (amdgpu_encoder->underscan_hborder != 0)
1423 				amdgpu_crtc->h_border = amdgpu_encoder->underscan_hborder;
1424 			else
1425 				amdgpu_crtc->h_border = (mode->hdisplay >> 5) + 16;
1426 			if (amdgpu_encoder->underscan_vborder != 0)
1427 				amdgpu_crtc->v_border = amdgpu_encoder->underscan_vborder;
1428 			else
1429 				amdgpu_crtc->v_border = (mode->vdisplay >> 5) + 16;
1430 			amdgpu_crtc->rmx_type = RMX_FULL;
1431 			src_v = crtc->mode.vdisplay;
1432 			dst_v = crtc->mode.vdisplay - (amdgpu_crtc->v_border * 2);
1433 			src_h = crtc->mode.hdisplay;
1434 			dst_h = crtc->mode.hdisplay - (amdgpu_crtc->h_border * 2);
1435 		}
1436 	}
1437 	if (amdgpu_crtc->rmx_type != RMX_OFF) {
1438 		fixed20_12 a, b;
1439 
1440 		a.full = dfixed_const(src_v);
1441 		b.full = dfixed_const(dst_v);
1442 		amdgpu_crtc->vsc.full = dfixed_div(a, b);
1443 		a.full = dfixed_const(src_h);
1444 		b.full = dfixed_const(dst_h);
1445 		amdgpu_crtc->hsc.full = dfixed_div(a, b);
1446 	} else {
1447 		amdgpu_crtc->vsc.full = dfixed_const(1);
1448 		amdgpu_crtc->hsc.full = dfixed_const(1);
1449 	}
1450 	return true;
1451 }
1452 
1453 /*
1454  * Retrieve current video scanout position of crtc on a given gpu, and
1455  * an optional accurate timestamp of when query happened.
1456  *
1457  * \param dev Device to query.
1458  * \param pipe Crtc to query.
1459  * \param flags from caller (DRM_CALLED_FROM_VBLIRQ or 0).
1460  *              For driver internal use only also supports these flags:
1461  *
1462  *              USE_REAL_VBLANKSTART to use the real start of vblank instead
1463  *              of a fudged earlier start of vblank.
1464  *
1465  *              GET_DISTANCE_TO_VBLANKSTART to return distance to the
1466  *              fudged earlier start of vblank in *vpos and the distance
1467  *              to true start of vblank in *hpos.
1468  *
1469  * \param *vpos Location where vertical scanout position should be stored.
1470  * \param *hpos Location where horizontal scanout position should go.
1471  * \param *stime Target location for timestamp taken immediately before
1472  *               scanout position query. Can be NULL to skip timestamp.
1473  * \param *etime Target location for timestamp taken immediately after
1474  *               scanout position query. Can be NULL to skip timestamp.
1475  *
1476  * Returns vpos as a positive number while in active scanout area.
1477  * Returns vpos as a negative number inside vblank, counting the number
1478  * of scanlines to go until end of vblank, e.g., -1 means "one scanline
1479  * until start of active scanout / end of vblank."
1480  *
1481  * \return Flags, or'ed together as follows:
1482  *
1483  * DRM_SCANOUTPOS_VALID = Query successful.
1484  * DRM_SCANOUTPOS_INVBL = Inside vblank.
1485  * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
1486  * this flag means that returned position may be offset by a constant but
1487  * unknown small number of scanlines wrt. real scanout position.
1488  *
1489  */
1490 int amdgpu_display_get_crtc_scanoutpos(struct drm_device *dev,
1491 			unsigned int pipe, unsigned int flags, int *vpos,
1492 			int *hpos, ktime_t *stime, ktime_t *etime,
1493 			const struct drm_display_mode *mode)
1494 {
1495 	u32 vbl = 0, position = 0;
1496 	int vbl_start, vbl_end, vtotal, ret = 0;
1497 	bool in_vbl = true;
1498 
1499 	struct amdgpu_device *adev = drm_to_adev(dev);
1500 
1501 	/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
1502 
1503 	/* Get optional system timestamp before query. */
1504 	if (stime)
1505 		*stime = ktime_get();
1506 
1507 	if (amdgpu_display_page_flip_get_scanoutpos(adev, pipe, &vbl, &position) == 0)
1508 		ret |= DRM_SCANOUTPOS_VALID;
1509 
1510 	/* Get optional system timestamp after query. */
1511 	if (etime)
1512 		*etime = ktime_get();
1513 
1514 	/* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
1515 
1516 	/* Decode into vertical and horizontal scanout position. */
1517 	*vpos = position & 0x1fff;
1518 	*hpos = (position >> 16) & 0x1fff;
1519 
1520 	/* Valid vblank area boundaries from gpu retrieved? */
1521 	if (vbl > 0) {
1522 		/* Yes: Decode. */
1523 		ret |= DRM_SCANOUTPOS_ACCURATE;
1524 		vbl_start = vbl & 0x1fff;
1525 		vbl_end = (vbl >> 16) & 0x1fff;
1526 	} else {
1527 		/* No: Fake something reasonable which gives at least ok results. */
1528 		vbl_start = mode->crtc_vdisplay;
1529 		vbl_end = 0;
1530 	}
1531 
1532 	/* Called from driver internal vblank counter query code? */
1533 	if (flags & GET_DISTANCE_TO_VBLANKSTART) {
1534 		/* Caller wants distance from real vbl_start in *hpos */
1535 		*hpos = *vpos - vbl_start;
1536 	}
1537 
1538 	/* Fudge vblank to start a few scanlines earlier to handle the
1539 	 * problem that vblank irqs fire a few scanlines before start
1540 	 * of vblank. Some driver internal callers need the true vblank
1541 	 * start to be used and signal this via the USE_REAL_VBLANKSTART flag.
1542 	 *
1543 	 * The cause of the "early" vblank irq is that the irq is triggered
1544 	 * by the line buffer logic when the line buffer read position enters
1545 	 * the vblank, whereas our crtc scanout position naturally lags the
1546 	 * line buffer read position.
1547 	 */
1548 	if (!(flags & USE_REAL_VBLANKSTART))
1549 		vbl_start -= adev->mode_info.crtcs[pipe]->lb_vblank_lead_lines;
1550 
1551 	/* Test scanout position against vblank region. */
1552 	if ((*vpos < vbl_start) && (*vpos >= vbl_end))
1553 		in_vbl = false;
1554 
1555 	/* In vblank? */
1556 	if (in_vbl)
1557 		ret |= DRM_SCANOUTPOS_IN_VBLANK;
1558 
1559 	/* Called from driver internal vblank counter query code? */
1560 	if (flags & GET_DISTANCE_TO_VBLANKSTART) {
1561 		/* Caller wants distance from fudged earlier vbl_start */
1562 		*vpos -= vbl_start;
1563 		return ret;
1564 	}
1565 
1566 	/* Check if inside vblank area and apply corrective offsets:
1567 	 * vpos will then be >=0 in video scanout area, but negative
1568 	 * within vblank area, counting down the number of lines until
1569 	 * start of scanout.
1570 	 */
1571 
1572 	/* Inside "upper part" of vblank area? Apply corrective offset if so: */
1573 	if (in_vbl && (*vpos >= vbl_start)) {
1574 		vtotal = mode->crtc_vtotal;
1575 
1576 		/* With variable refresh rate displays the vpos can exceed
1577 		 * the vtotal value. Clamp to 0 to return -vbl_end instead
1578 		 * of guessing the remaining number of lines until scanout.
1579 		 */
1580 		*vpos = (*vpos < vtotal) ? (*vpos - vtotal) : 0;
1581 	}
1582 
1583 	/* Correct for shifted end of vbl at vbl_end. */
1584 	*vpos = *vpos - vbl_end;
1585 
1586 	return ret;
1587 }
1588 
1589 int amdgpu_display_crtc_idx_to_irq_type(struct amdgpu_device *adev, int crtc)
1590 {
1591 	if (crtc < 0 || crtc >= adev->mode_info.num_crtc)
1592 		return AMDGPU_CRTC_IRQ_NONE;
1593 
1594 	switch (crtc) {
1595 	case 0:
1596 		return AMDGPU_CRTC_IRQ_VBLANK1;
1597 	case 1:
1598 		return AMDGPU_CRTC_IRQ_VBLANK2;
1599 	case 2:
1600 		return AMDGPU_CRTC_IRQ_VBLANK3;
1601 	case 3:
1602 		return AMDGPU_CRTC_IRQ_VBLANK4;
1603 	case 4:
1604 		return AMDGPU_CRTC_IRQ_VBLANK5;
1605 	case 5:
1606 		return AMDGPU_CRTC_IRQ_VBLANK6;
1607 	default:
1608 		return AMDGPU_CRTC_IRQ_NONE;
1609 	}
1610 }
1611 
1612 bool amdgpu_crtc_get_scanout_position(struct drm_crtc *crtc,
1613 			bool in_vblank_irq, int *vpos,
1614 			int *hpos, ktime_t *stime, ktime_t *etime,
1615 			const struct drm_display_mode *mode)
1616 {
1617 	struct drm_device *dev = crtc->dev;
1618 	unsigned int pipe = crtc->index;
1619 
1620 	return amdgpu_display_get_crtc_scanoutpos(dev, pipe, 0, vpos, hpos,
1621 						  stime, etime, mode);
1622 }
1623 
1624 static bool
1625 amdgpu_display_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
1626 {
1627 	struct drm_device *dev = adev_to_drm(adev);
1628 	struct drm_fb_helper *fb_helper = dev->fb_helper;
1629 
1630 	if (!fb_helper || !fb_helper->buffer)
1631 		return false;
1632 
1633 	if (gem_to_amdgpu_bo(fb_helper->buffer->gem) != robj)
1634 		return false;
1635 
1636 	return true;
1637 }
1638 
1639 int amdgpu_display_suspend_helper(struct amdgpu_device *adev)
1640 {
1641 	struct drm_device *dev = adev_to_drm(adev);
1642 	struct drm_crtc *crtc;
1643 	struct drm_connector *connector;
1644 	struct drm_connector_list_iter iter;
1645 	int r;
1646 
1647 	drm_kms_helper_poll_disable(dev);
1648 
1649 	/* turn off display hw */
1650 	drm_modeset_lock_all(dev);
1651 	drm_connector_list_iter_begin(dev, &iter);
1652 	drm_for_each_connector_iter(connector, &iter)
1653 		drm_helper_connector_dpms(connector,
1654 					  DRM_MODE_DPMS_OFF);
1655 	drm_connector_list_iter_end(&iter);
1656 	drm_modeset_unlock_all(dev);
1657 	/* unpin the front buffers and cursors */
1658 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1659 		struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
1660 		struct drm_framebuffer *fb = crtc->primary->fb;
1661 		struct amdgpu_bo *robj;
1662 
1663 		if (amdgpu_crtc->cursor_bo && !adev->enable_virtual_display) {
1664 			struct amdgpu_bo *aobj = gem_to_amdgpu_bo(amdgpu_crtc->cursor_bo);
1665 
1666 			r = amdgpu_bo_reserve(aobj, true);
1667 			if (r == 0) {
1668 				amdgpu_bo_unpin(aobj);
1669 				amdgpu_bo_unreserve(aobj);
1670 			}
1671 		}
1672 
1673 		if (!fb || !fb->obj[0])
1674 			continue;
1675 
1676 		robj = gem_to_amdgpu_bo(fb->obj[0]);
1677 		if (!amdgpu_display_robj_is_fb(adev, robj)) {
1678 			r = amdgpu_bo_reserve(robj, true);
1679 			if (r == 0) {
1680 				amdgpu_bo_unpin(robj);
1681 				amdgpu_bo_unreserve(robj);
1682 			}
1683 		}
1684 	}
1685 	return 0;
1686 }
1687 
1688 int amdgpu_display_resume_helper(struct amdgpu_device *adev)
1689 {
1690 	struct drm_device *dev = adev_to_drm(adev);
1691 	struct drm_connector *connector;
1692 	struct drm_connector_list_iter iter;
1693 	struct drm_crtc *crtc;
1694 	int r;
1695 
1696 	/* pin cursors */
1697 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1698 		struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
1699 
1700 		if (amdgpu_crtc->cursor_bo && !adev->enable_virtual_display) {
1701 			struct amdgpu_bo *aobj = gem_to_amdgpu_bo(amdgpu_crtc->cursor_bo);
1702 
1703 			r = amdgpu_bo_reserve(aobj, true);
1704 			if (r == 0) {
1705 				r = amdgpu_bo_pin(aobj, AMDGPU_GEM_DOMAIN_VRAM);
1706 				if (r != 0)
1707 					dev_err(adev->dev, "Failed to pin cursor BO (%d)\n", r);
1708 				amdgpu_crtc->cursor_addr = amdgpu_bo_gpu_offset(aobj);
1709 				amdgpu_bo_unreserve(aobj);
1710 			}
1711 		}
1712 	}
1713 
1714 	drm_helper_resume_force_mode(dev);
1715 
1716 	/* turn on display hw */
1717 	drm_modeset_lock_all(dev);
1718 
1719 	drm_connector_list_iter_begin(dev, &iter);
1720 	drm_for_each_connector_iter(connector, &iter)
1721 		drm_helper_connector_dpms(connector,
1722 					  DRM_MODE_DPMS_ON);
1723 	drm_connector_list_iter_end(&iter);
1724 
1725 	drm_modeset_unlock_all(dev);
1726 
1727 	drm_kms_helper_poll_enable(dev);
1728 
1729 	return 0;
1730 }
1731 
1732