1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2013-2014 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 *
6 * Copyright (c) 2014,2017 The Linux Foundation. All rights reserved.
7 */
8
9 #include "adreno_gpu.h"
10
11 bool hang_debug = false;
12 MODULE_PARM_DESC(hang_debug, "Dump registers when hang is detected (can be slow!)");
13 module_param_named(hang_debug, hang_debug, bool, 0600);
14
15 bool snapshot_debugbus = false;
16 MODULE_PARM_DESC(snapshot_debugbus, "Include debugbus sections in GPU devcoredump (if not fused off)");
17 module_param_named(snapshot_debugbus, snapshot_debugbus, bool, 0600);
18
19 bool allow_vram_carveout = false;
20 MODULE_PARM_DESC(allow_vram_carveout, "Allow using VRAM Carveout, in place of IOMMU");
21 module_param_named(allow_vram_carveout, allow_vram_carveout, bool, 0600);
22
23 static const struct adreno_info gpulist[] = {
24 {
25 .rev = ADRENO_REV(2, 0, 0, 0),
26 .revn = 200,
27 .name = "A200",
28 .fw = {
29 [ADRENO_FW_PM4] = "yamato_pm4.fw",
30 [ADRENO_FW_PFP] = "yamato_pfp.fw",
31 },
32 .gmem = SZ_256K,
33 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
34 .init = a2xx_gpu_init,
35 }, { /* a200 on i.mx51 has only 128kib gmem */
36 .rev = ADRENO_REV(2, 0, 0, 1),
37 .revn = 201,
38 .name = "A200",
39 .fw = {
40 [ADRENO_FW_PM4] = "yamato_pm4.fw",
41 [ADRENO_FW_PFP] = "yamato_pfp.fw",
42 },
43 .gmem = SZ_128K,
44 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
45 .init = a2xx_gpu_init,
46 }, {
47 .rev = ADRENO_REV(2, 2, 0, ANY_ID),
48 .revn = 220,
49 .name = "A220",
50 .fw = {
51 [ADRENO_FW_PM4] = "leia_pm4_470.fw",
52 [ADRENO_FW_PFP] = "leia_pfp_470.fw",
53 },
54 .gmem = SZ_512K,
55 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
56 .init = a2xx_gpu_init,
57 }, {
58 .rev = ADRENO_REV(3, 0, 5, ANY_ID),
59 .revn = 305,
60 .name = "A305",
61 .fw = {
62 [ADRENO_FW_PM4] = "a300_pm4.fw",
63 [ADRENO_FW_PFP] = "a300_pfp.fw",
64 },
65 .gmem = SZ_256K,
66 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
67 .init = a3xx_gpu_init,
68 }, {
69 .rev = ADRENO_REV(3, 0, 6, 0),
70 .revn = 307, /* because a305c is revn==306 */
71 .name = "A306",
72 .fw = {
73 [ADRENO_FW_PM4] = "a300_pm4.fw",
74 [ADRENO_FW_PFP] = "a300_pfp.fw",
75 },
76 .gmem = SZ_128K,
77 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
78 .init = a3xx_gpu_init,
79 }, {
80 .rev = ADRENO_REV(3, 2, ANY_ID, ANY_ID),
81 .revn = 320,
82 .name = "A320",
83 .fw = {
84 [ADRENO_FW_PM4] = "a300_pm4.fw",
85 [ADRENO_FW_PFP] = "a300_pfp.fw",
86 },
87 .gmem = SZ_512K,
88 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
89 .init = a3xx_gpu_init,
90 }, {
91 .rev = ADRENO_REV(3, 3, 0, ANY_ID),
92 .revn = 330,
93 .name = "A330",
94 .fw = {
95 [ADRENO_FW_PM4] = "a330_pm4.fw",
96 [ADRENO_FW_PFP] = "a330_pfp.fw",
97 },
98 .gmem = SZ_1M,
99 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
100 .init = a3xx_gpu_init,
101 }, {
102 .rev = ADRENO_REV(4, 0, 5, ANY_ID),
103 .revn = 405,
104 .name = "A405",
105 .fw = {
106 [ADRENO_FW_PM4] = "a420_pm4.fw",
107 [ADRENO_FW_PFP] = "a420_pfp.fw",
108 },
109 .gmem = SZ_256K,
110 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
111 .init = a4xx_gpu_init,
112 }, {
113 .rev = ADRENO_REV(4, 2, 0, ANY_ID),
114 .revn = 420,
115 .name = "A420",
116 .fw = {
117 [ADRENO_FW_PM4] = "a420_pm4.fw",
118 [ADRENO_FW_PFP] = "a420_pfp.fw",
119 },
120 .gmem = (SZ_1M + SZ_512K),
121 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
122 .init = a4xx_gpu_init,
123 }, {
124 .rev = ADRENO_REV(4, 3, 0, ANY_ID),
125 .revn = 430,
126 .name = "A430",
127 .fw = {
128 [ADRENO_FW_PM4] = "a420_pm4.fw",
129 [ADRENO_FW_PFP] = "a420_pfp.fw",
130 },
131 .gmem = (SZ_1M + SZ_512K),
132 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
133 .init = a4xx_gpu_init,
134 }, {
135 .rev = ADRENO_REV(5, 0, 6, ANY_ID),
136 .revn = 506,
137 .name = "A506",
138 .fw = {
139 [ADRENO_FW_PM4] = "a530_pm4.fw",
140 [ADRENO_FW_PFP] = "a530_pfp.fw",
141 },
142 .gmem = (SZ_128K + SZ_8K),
143 /*
144 * Increase inactive period to 250 to avoid bouncing
145 * the GDSC which appears to make it grumpy
146 */
147 .inactive_period = 250,
148 .quirks = ADRENO_QUIRK_TWO_PASS_USE_WFI |
149 ADRENO_QUIRK_LMLOADKILL_DISABLE,
150 .init = a5xx_gpu_init,
151 .zapfw = "a506_zap.mdt",
152 }, {
153 .rev = ADRENO_REV(5, 0, 8, ANY_ID),
154 .revn = 508,
155 .name = "A508",
156 .fw = {
157 [ADRENO_FW_PM4] = "a530_pm4.fw",
158 [ADRENO_FW_PFP] = "a530_pfp.fw",
159 },
160 .gmem = (SZ_128K + SZ_8K),
161 /*
162 * Increase inactive period to 250 to avoid bouncing
163 * the GDSC which appears to make it grumpy
164 */
165 .inactive_period = 250,
166 .quirks = ADRENO_QUIRK_LMLOADKILL_DISABLE,
167 .init = a5xx_gpu_init,
168 .zapfw = "a508_zap.mdt",
169 }, {
170 .rev = ADRENO_REV(5, 0, 9, ANY_ID),
171 .revn = 509,
172 .name = "A509",
173 .fw = {
174 [ADRENO_FW_PM4] = "a530_pm4.fw",
175 [ADRENO_FW_PFP] = "a530_pfp.fw",
176 },
177 .gmem = (SZ_256K + SZ_16K),
178 /*
179 * Increase inactive period to 250 to avoid bouncing
180 * the GDSC which appears to make it grumpy
181 */
182 .inactive_period = 250,
183 .quirks = ADRENO_QUIRK_LMLOADKILL_DISABLE,
184 .init = a5xx_gpu_init,
185 /* Adreno 509 uses the same ZAP as 512 */
186 .zapfw = "a512_zap.mdt",
187 }, {
188 .rev = ADRENO_REV(5, 1, 0, ANY_ID),
189 .revn = 510,
190 .name = "A510",
191 .fw = {
192 [ADRENO_FW_PM4] = "a530_pm4.fw",
193 [ADRENO_FW_PFP] = "a530_pfp.fw",
194 },
195 .gmem = SZ_256K,
196 /*
197 * Increase inactive period to 250 to avoid bouncing
198 * the GDSC which appears to make it grumpy
199 */
200 .inactive_period = 250,
201 .init = a5xx_gpu_init,
202 }, {
203 .rev = ADRENO_REV(5, 1, 2, ANY_ID),
204 .revn = 512,
205 .name = "A512",
206 .fw = {
207 [ADRENO_FW_PM4] = "a530_pm4.fw",
208 [ADRENO_FW_PFP] = "a530_pfp.fw",
209 },
210 .gmem = (SZ_256K + SZ_16K),
211 /*
212 * Increase inactive period to 250 to avoid bouncing
213 * the GDSC which appears to make it grumpy
214 */
215 .inactive_period = 250,
216 .quirks = ADRENO_QUIRK_LMLOADKILL_DISABLE,
217 .init = a5xx_gpu_init,
218 .zapfw = "a512_zap.mdt",
219 }, {
220 .rev = ADRENO_REV(5, 3, 0, 2),
221 .revn = 530,
222 .name = "A530",
223 .fw = {
224 [ADRENO_FW_PM4] = "a530_pm4.fw",
225 [ADRENO_FW_PFP] = "a530_pfp.fw",
226 [ADRENO_FW_GPMU] = "a530v3_gpmu.fw2",
227 },
228 .gmem = SZ_1M,
229 /*
230 * Increase inactive period to 250 to avoid bouncing
231 * the GDSC which appears to make it grumpy
232 */
233 .inactive_period = 250,
234 .quirks = ADRENO_QUIRK_TWO_PASS_USE_WFI |
235 ADRENO_QUIRK_FAULT_DETECT_MASK,
236 .init = a5xx_gpu_init,
237 .zapfw = "a530_zap.mdt",
238 }, {
239 .rev = ADRENO_REV(5, 4, 0, ANY_ID),
240 .revn = 540,
241 .name = "A540",
242 .fw = {
243 [ADRENO_FW_PM4] = "a530_pm4.fw",
244 [ADRENO_FW_PFP] = "a530_pfp.fw",
245 [ADRENO_FW_GPMU] = "a540_gpmu.fw2",
246 },
247 .gmem = SZ_1M,
248 /*
249 * Increase inactive period to 250 to avoid bouncing
250 * the GDSC which appears to make it grumpy
251 */
252 .inactive_period = 250,
253 .quirks = ADRENO_QUIRK_LMLOADKILL_DISABLE,
254 .init = a5xx_gpu_init,
255 .zapfw = "a540_zap.mdt",
256 }, {
257 .rev = ADRENO_REV(6, 1, 8, ANY_ID),
258 .revn = 618,
259 .name = "A618",
260 .fw = {
261 [ADRENO_FW_SQE] = "a630_sqe.fw",
262 [ADRENO_FW_GMU] = "a630_gmu.bin",
263 },
264 .gmem = SZ_512K,
265 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
266 .init = a6xx_gpu_init,
267 }, {
268 .rev = ADRENO_REV(6, 3, 0, ANY_ID),
269 .revn = 630,
270 .name = "A630",
271 .fw = {
272 [ADRENO_FW_SQE] = "a630_sqe.fw",
273 [ADRENO_FW_GMU] = "a630_gmu.bin",
274 },
275 .gmem = SZ_1M,
276 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
277 .init = a6xx_gpu_init,
278 .zapfw = "a630_zap.mdt",
279 .hwcg = a630_hwcg,
280 }, {
281 .rev = ADRENO_REV(6, 4, 0, ANY_ID),
282 .revn = 640,
283 .name = "A640",
284 .fw = {
285 [ADRENO_FW_SQE] = "a630_sqe.fw",
286 [ADRENO_FW_GMU] = "a640_gmu.bin",
287 },
288 .gmem = SZ_1M,
289 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
290 .init = a6xx_gpu_init,
291 .zapfw = "a640_zap.mdt",
292 .hwcg = a640_hwcg,
293 }, {
294 .rev = ADRENO_REV(6, 5, 0, ANY_ID),
295 .revn = 650,
296 .name = "A650",
297 .fw = {
298 [ADRENO_FW_SQE] = "a650_sqe.fw",
299 [ADRENO_FW_GMU] = "a650_gmu.bin",
300 },
301 .gmem = SZ_1M + SZ_128K,
302 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
303 .init = a6xx_gpu_init,
304 .zapfw = "a650_zap.mdt",
305 .hwcg = a650_hwcg,
306 }, {
307 .rev = ADRENO_REV(6, 6, 0, ANY_ID),
308 .revn = 660,
309 .name = "A660",
310 .fw = {
311 [ADRENO_FW_SQE] = "a660_sqe.fw",
312 [ADRENO_FW_GMU] = "a660_gmu.bin",
313 },
314 .gmem = SZ_1M + SZ_512K,
315 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
316 .init = a6xx_gpu_init,
317 .zapfw = "a660_zap.mdt",
318 .hwcg = a660_hwcg,
319 }, {
320 .rev = ADRENO_REV(6, 3, 5, ANY_ID),
321 .fw = {
322 [ADRENO_FW_SQE] = "a660_sqe.fw",
323 [ADRENO_FW_GMU] = "a660_gmu.bin",
324 },
325 .gmem = SZ_512K,
326 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
327 .init = a6xx_gpu_init,
328 .hwcg = a660_hwcg,
329 }, {
330 .rev = ADRENO_REV(6, 8, 0, ANY_ID),
331 .revn = 680,
332 .name = "A680",
333 .fw = {
334 [ADRENO_FW_SQE] = "a630_sqe.fw",
335 [ADRENO_FW_GMU] = "a640_gmu.bin",
336 },
337 .gmem = SZ_2M,
338 .inactive_period = DRM_MSM_INACTIVE_PERIOD,
339 .init = a6xx_gpu_init,
340 .zapfw = "a640_zap.mdt",
341 .hwcg = a640_hwcg,
342 },
343 };
344
345 MODULE_FIRMWARE("qcom/a300_pm4.fw");
346 MODULE_FIRMWARE("qcom/a300_pfp.fw");
347 MODULE_FIRMWARE("qcom/a330_pm4.fw");
348 MODULE_FIRMWARE("qcom/a330_pfp.fw");
349 MODULE_FIRMWARE("qcom/a420_pm4.fw");
350 MODULE_FIRMWARE("qcom/a420_pfp.fw");
351 MODULE_FIRMWARE("qcom/a530_pm4.fw");
352 MODULE_FIRMWARE("qcom/a530_pfp.fw");
353 MODULE_FIRMWARE("qcom/a530v3_gpmu.fw2");
354 MODULE_FIRMWARE("qcom/a530_zap.mdt");
355 MODULE_FIRMWARE("qcom/a530_zap.b00");
356 MODULE_FIRMWARE("qcom/a530_zap.b01");
357 MODULE_FIRMWARE("qcom/a530_zap.b02");
358 MODULE_FIRMWARE("qcom/a630_sqe.fw");
359 MODULE_FIRMWARE("qcom/a630_gmu.bin");
360 MODULE_FIRMWARE("qcom/a630_zap.mbn");
361
_rev_match(uint8_t entry,uint8_t id)362 static inline bool _rev_match(uint8_t entry, uint8_t id)
363 {
364 return (entry == ANY_ID) || (entry == id);
365 }
366
adreno_cmp_rev(struct adreno_rev rev1,struct adreno_rev rev2)367 bool adreno_cmp_rev(struct adreno_rev rev1, struct adreno_rev rev2)
368 {
369
370 return _rev_match(rev1.core, rev2.core) &&
371 _rev_match(rev1.major, rev2.major) &&
372 _rev_match(rev1.minor, rev2.minor) &&
373 _rev_match(rev1.patchid, rev2.patchid);
374 }
375
adreno_info(struct adreno_rev rev)376 const struct adreno_info *adreno_info(struct adreno_rev rev)
377 {
378 int i;
379
380 /* identify gpu: */
381 for (i = 0; i < ARRAY_SIZE(gpulist); i++) {
382 const struct adreno_info *info = &gpulist[i];
383 if (adreno_cmp_rev(info->rev, rev))
384 return info;
385 }
386
387 return NULL;
388 }
389
adreno_load_gpu(struct drm_device * dev)390 struct msm_gpu *adreno_load_gpu(struct drm_device *dev)
391 {
392 struct msm_drm_private *priv = dev->dev_private;
393 struct platform_device *pdev = priv->gpu_pdev;
394 struct msm_gpu *gpu = NULL;
395 struct adreno_gpu *adreno_gpu;
396 int ret;
397
398 if (pdev)
399 gpu = dev_to_gpu(&pdev->dev);
400
401 if (!gpu) {
402 dev_err_once(dev->dev, "no GPU device was found\n");
403 return NULL;
404 }
405
406 adreno_gpu = to_adreno_gpu(gpu);
407
408 /*
409 * The number one reason for HW init to fail is if the firmware isn't
410 * loaded yet. Try that first and don't bother continuing on
411 * otherwise
412 */
413
414 ret = adreno_load_fw(adreno_gpu);
415 if (ret)
416 return NULL;
417
418 /* Make sure pm runtime is active and reset any previous errors */
419 pm_runtime_set_active(&pdev->dev);
420
421 ret = pm_runtime_get_sync(&pdev->dev);
422 if (ret < 0) {
423 pm_runtime_put_sync(&pdev->dev);
424 DRM_DEV_ERROR(dev->dev, "Couldn't power up the GPU: %d\n", ret);
425 return NULL;
426 }
427
428 mutex_lock(&gpu->lock);
429 ret = msm_gpu_hw_init(gpu);
430 mutex_unlock(&gpu->lock);
431 pm_runtime_put_autosuspend(&pdev->dev);
432 if (ret) {
433 DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n", ret);
434 return NULL;
435 }
436
437 #ifdef CONFIG_DEBUG_FS
438 if (gpu->funcs->debugfs_init) {
439 gpu->funcs->debugfs_init(gpu, dev->primary);
440 gpu->funcs->debugfs_init(gpu, dev->render);
441 }
442 #endif
443
444 return gpu;
445 }
446
find_chipid(struct device * dev,struct adreno_rev * rev)447 static int find_chipid(struct device *dev, struct adreno_rev *rev)
448 {
449 struct device_node *node = dev->of_node;
450 const char *compat;
451 int ret;
452 u32 chipid;
453
454 /* first search the compat strings for qcom,adreno-XYZ.W: */
455 ret = of_property_read_string_index(node, "compatible", 0, &compat);
456 if (ret == 0) {
457 unsigned int r, patch;
458
459 if (sscanf(compat, "qcom,adreno-%u.%u", &r, &patch) == 2 ||
460 sscanf(compat, "amd,imageon-%u.%u", &r, &patch) == 2) {
461 rev->core = r / 100;
462 r %= 100;
463 rev->major = r / 10;
464 r %= 10;
465 rev->minor = r;
466 rev->patchid = patch;
467
468 return 0;
469 }
470 }
471
472 /* and if that fails, fall back to legacy "qcom,chipid" property: */
473 ret = of_property_read_u32(node, "qcom,chipid", &chipid);
474 if (ret) {
475 DRM_DEV_ERROR(dev, "could not parse qcom,chipid: %d\n", ret);
476 return ret;
477 }
478
479 rev->core = (chipid >> 24) & 0xff;
480 rev->major = (chipid >> 16) & 0xff;
481 rev->minor = (chipid >> 8) & 0xff;
482 rev->patchid = (chipid & 0xff);
483
484 dev_warn(dev, "Using legacy qcom,chipid binding!\n");
485 dev_warn(dev, "Use compatible qcom,adreno-%u%u%u.%u instead.\n",
486 rev->core, rev->major, rev->minor, rev->patchid);
487
488 return 0;
489 }
490
adreno_bind(struct device * dev,struct device * master,void * data)491 static int adreno_bind(struct device *dev, struct device *master, void *data)
492 {
493 static struct adreno_platform_config config = {};
494 const struct adreno_info *info;
495 struct msm_drm_private *priv = dev_get_drvdata(master);
496 struct drm_device *drm = priv->dev;
497 struct msm_gpu *gpu;
498 int ret;
499
500 ret = find_chipid(dev, &config.rev);
501 if (ret)
502 return ret;
503
504 dev->platform_data = &config;
505 priv->gpu_pdev = to_platform_device(dev);
506
507 info = adreno_info(config.rev);
508
509 if (!info) {
510 dev_warn(drm->dev, "Unknown GPU revision: %u.%u.%u.%u\n",
511 config.rev.core, config.rev.major,
512 config.rev.minor, config.rev.patchid);
513 return -ENXIO;
514 }
515
516 DBG("Found GPU: %u.%u.%u.%u", config.rev.core, config.rev.major,
517 config.rev.minor, config.rev.patchid);
518
519 priv->is_a2xx = config.rev.core == 2;
520 priv->has_cached_coherent = config.rev.core >= 6;
521
522 gpu = info->init(drm);
523 if (IS_ERR(gpu)) {
524 dev_warn(drm->dev, "failed to load adreno gpu\n");
525 return PTR_ERR(gpu);
526 }
527
528 return 0;
529 }
530
adreno_unbind(struct device * dev,struct device * master,void * data)531 static void adreno_unbind(struct device *dev, struct device *master,
532 void *data)
533 {
534 struct msm_drm_private *priv = dev_get_drvdata(master);
535 struct msm_gpu *gpu = dev_to_gpu(dev);
536
537 pm_runtime_force_suspend(dev);
538 gpu->funcs->destroy(gpu);
539
540 priv->gpu_pdev = NULL;
541 }
542
543 static const struct component_ops a3xx_ops = {
544 .bind = adreno_bind,
545 .unbind = adreno_unbind,
546 };
547
adreno_device_register_headless(void)548 static void adreno_device_register_headless(void)
549 {
550 /* on imx5, we don't have a top-level mdp/dpu node
551 * this creates a dummy node for the driver for that case
552 */
553 struct platform_device_info dummy_info = {
554 .parent = NULL,
555 .name = "msm",
556 .id = -1,
557 .res = NULL,
558 .num_res = 0,
559 .data = NULL,
560 .size_data = 0,
561 .dma_mask = ~0,
562 };
563 platform_device_register_full(&dummy_info);
564 }
565
adreno_probe(struct platform_device * pdev)566 static int adreno_probe(struct platform_device *pdev)
567 {
568
569 int ret;
570
571 ret = component_add(&pdev->dev, &a3xx_ops);
572 if (ret)
573 return ret;
574
575 if (of_device_is_compatible(pdev->dev.of_node, "amd,imageon"))
576 adreno_device_register_headless();
577
578 return 0;
579 }
580
adreno_remove(struct platform_device * pdev)581 static int adreno_remove(struct platform_device *pdev)
582 {
583 component_del(&pdev->dev, &a3xx_ops);
584 return 0;
585 }
586
adreno_shutdown(struct platform_device * pdev)587 static void adreno_shutdown(struct platform_device *pdev)
588 {
589 pm_runtime_force_suspend(&pdev->dev);
590 }
591
592 static const struct of_device_id dt_match[] = {
593 { .compatible = "qcom,adreno" },
594 { .compatible = "qcom,adreno-3xx" },
595 /* for compatibility with imx5 gpu: */
596 { .compatible = "amd,imageon" },
597 /* for backwards compat w/ downstream kgsl DT files: */
598 { .compatible = "qcom,kgsl-3d0" },
599 {}
600 };
601
adreno_runtime_resume(struct device * dev)602 static int adreno_runtime_resume(struct device *dev)
603 {
604 struct msm_gpu *gpu = dev_to_gpu(dev);
605
606 return gpu->funcs->pm_resume(gpu);
607 }
608
adreno_runtime_suspend(struct device * dev)609 static int adreno_runtime_suspend(struct device *dev)
610 {
611 struct msm_gpu *gpu = dev_to_gpu(dev);
612
613 /*
614 * We should be holding a runpm ref, which will prevent
615 * runtime suspend. In the system suspend path, we've
616 * already waited for active jobs to complete.
617 */
618 WARN_ON_ONCE(gpu->active_submits);
619
620 return gpu->funcs->pm_suspend(gpu);
621 }
622
suspend_scheduler(struct msm_gpu * gpu)623 static void suspend_scheduler(struct msm_gpu *gpu)
624 {
625 int i;
626
627 /*
628 * Shut down the scheduler before we force suspend, so that
629 * suspend isn't racing with scheduler kthread feeding us
630 * more work.
631 *
632 * Note, we just want to park the thread, and let any jobs
633 * that are already on the hw queue complete normally, as
634 * opposed to the drm_sched_stop() path used for handling
635 * faulting/timed-out jobs. We can't really cancel any jobs
636 * already on the hw queue without racing with the GPU.
637 */
638 for (i = 0; i < gpu->nr_rings; i++) {
639 struct drm_gpu_scheduler *sched = &gpu->rb[i]->sched;
640 kthread_park(sched->thread);
641 }
642 }
643
resume_scheduler(struct msm_gpu * gpu)644 static void resume_scheduler(struct msm_gpu *gpu)
645 {
646 int i;
647
648 for (i = 0; i < gpu->nr_rings; i++) {
649 struct drm_gpu_scheduler *sched = &gpu->rb[i]->sched;
650 kthread_unpark(sched->thread);
651 }
652 }
653
adreno_system_suspend(struct device * dev)654 static int adreno_system_suspend(struct device *dev)
655 {
656 struct msm_gpu *gpu = dev_to_gpu(dev);
657 int remaining, ret;
658
659 suspend_scheduler(gpu);
660
661 remaining = wait_event_timeout(gpu->retire_event,
662 gpu->active_submits == 0,
663 msecs_to_jiffies(1000));
664 if (remaining == 0) {
665 dev_err(dev, "Timeout waiting for GPU to suspend\n");
666 ret = -EBUSY;
667 goto out;
668 }
669
670 ret = pm_runtime_force_suspend(dev);
671 out:
672 if (ret)
673 resume_scheduler(gpu);
674
675 return ret;
676 }
677
adreno_system_resume(struct device * dev)678 static int adreno_system_resume(struct device *dev)
679 {
680 resume_scheduler(dev_to_gpu(dev));
681 return pm_runtime_force_resume(dev);
682 }
683
684 static const struct dev_pm_ops adreno_pm_ops = {
685 SYSTEM_SLEEP_PM_OPS(adreno_system_suspend, adreno_system_resume)
686 RUNTIME_PM_OPS(adreno_runtime_suspend, adreno_runtime_resume, NULL)
687 };
688
689 static struct platform_driver adreno_driver = {
690 .probe = adreno_probe,
691 .remove = adreno_remove,
692 .shutdown = adreno_shutdown,
693 .driver = {
694 .name = "adreno",
695 .of_match_table = dt_match,
696 .pm = &adreno_pm_ops,
697 },
698 };
699
adreno_register(void)700 void __init adreno_register(void)
701 {
702 platform_driver_register(&adreno_driver);
703 }
704
adreno_unregister(void)705 void __exit adreno_unregister(void)
706 {
707 platform_driver_unregister(&adreno_driver);
708 }
709