1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2014, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2013 Red Hat
5 * Author: Rob Clark <robdclark@gmail.com>
6 */
7
8 #include <linux/delay.h>
9 #include <linux/interconnect.h>
10 #include <linux/of_irq.h>
11
12 #include <drm/drm_debugfs.h>
13 #include <drm/drm_drv.h>
14 #include <drm/drm_file.h>
15 #include <drm/drm_vblank.h>
16
17 #include "msm_drv.h"
18 #include "msm_gem.h"
19 #include "msm_mmu.h"
20 #include "mdp5_kms.h"
21
mdp5_hw_init(struct msm_kms * kms)22 static int mdp5_hw_init(struct msm_kms *kms)
23 {
24 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
25 struct device *dev = &mdp5_kms->pdev->dev;
26 unsigned long flags;
27
28 pm_runtime_get_sync(dev);
29
30 /* Magic unknown register writes:
31 *
32 * W VBIF:0x004 00000001 (mdss_mdp.c:839)
33 * W MDP5:0x2e0 0xe9 (mdss_mdp.c:839)
34 * W MDP5:0x2e4 0x55 (mdss_mdp.c:839)
35 * W MDP5:0x3ac 0xc0000ccc (mdss_mdp.c:839)
36 * W MDP5:0x3b4 0xc0000ccc (mdss_mdp.c:839)
37 * W MDP5:0x3bc 0xcccccc (mdss_mdp.c:839)
38 * W MDP5:0x4a8 0xcccc0c0 (mdss_mdp.c:839)
39 * W MDP5:0x4b0 0xccccc0c0 (mdss_mdp.c:839)
40 * W MDP5:0x4b8 0xccccc000 (mdss_mdp.c:839)
41 *
42 * Downstream fbdev driver gets these register offsets/values
43 * from DT.. not really sure what these registers are or if
44 * different values for different boards/SoC's, etc. I guess
45 * they are the golden registers.
46 *
47 * Not setting these does not seem to cause any problem. But
48 * we may be getting lucky with the bootloader initializing
49 * them for us. OTOH, if we can always count on the bootloader
50 * setting the golden registers, then perhaps we don't need to
51 * care.
52 */
53
54 spin_lock_irqsave(&mdp5_kms->resource_lock, flags);
55 mdp5_write(mdp5_kms, REG_MDP5_DISP_INTF_SEL, 0);
56 spin_unlock_irqrestore(&mdp5_kms->resource_lock, flags);
57
58 mdp5_ctlm_hw_reset(mdp5_kms->ctlm);
59
60 pm_runtime_put_sync(dev);
61
62 return 0;
63 }
64
65 /* Global/shared object state funcs */
66
67 /*
68 * This is a helper that returns the private state currently in operation.
69 * Note that this would return the "old_state" if called in the atomic check
70 * path, and the "new_state" after the atomic swap has been done.
71 */
72 struct mdp5_global_state *
mdp5_get_existing_global_state(struct mdp5_kms * mdp5_kms)73 mdp5_get_existing_global_state(struct mdp5_kms *mdp5_kms)
74 {
75 return to_mdp5_global_state(mdp5_kms->glob_state.state);
76 }
77
78 /*
79 * This acquires the modeset lock set aside for global state, creates
80 * a new duplicated private object state.
81 */
mdp5_get_global_state(struct drm_atomic_state * s)82 struct mdp5_global_state *mdp5_get_global_state(struct drm_atomic_state *s)
83 {
84 struct msm_drm_private *priv = s->dev->dev_private;
85 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
86 struct drm_private_state *priv_state;
87 int ret;
88
89 ret = drm_modeset_lock(&mdp5_kms->glob_state_lock, s->acquire_ctx);
90 if (ret)
91 return ERR_PTR(ret);
92
93 priv_state = drm_atomic_get_private_obj_state(s, &mdp5_kms->glob_state);
94 if (IS_ERR(priv_state))
95 return ERR_CAST(priv_state);
96
97 return to_mdp5_global_state(priv_state);
98 }
99
100 static struct drm_private_state *
mdp5_global_duplicate_state(struct drm_private_obj * obj)101 mdp5_global_duplicate_state(struct drm_private_obj *obj)
102 {
103 struct mdp5_global_state *state;
104
105 state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
106 if (!state)
107 return NULL;
108
109 __drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
110
111 return &state->base;
112 }
113
mdp5_global_destroy_state(struct drm_private_obj * obj,struct drm_private_state * state)114 static void mdp5_global_destroy_state(struct drm_private_obj *obj,
115 struct drm_private_state *state)
116 {
117 struct mdp5_global_state *mdp5_state = to_mdp5_global_state(state);
118
119 kfree(mdp5_state);
120 }
121
122 static const struct drm_private_state_funcs mdp5_global_state_funcs = {
123 .atomic_duplicate_state = mdp5_global_duplicate_state,
124 .atomic_destroy_state = mdp5_global_destroy_state,
125 };
126
mdp5_global_obj_init(struct mdp5_kms * mdp5_kms)127 static int mdp5_global_obj_init(struct mdp5_kms *mdp5_kms)
128 {
129 struct mdp5_global_state *state;
130
131 drm_modeset_lock_init(&mdp5_kms->glob_state_lock);
132
133 state = kzalloc(sizeof(*state), GFP_KERNEL);
134 if (!state)
135 return -ENOMEM;
136
137 state->mdp5_kms = mdp5_kms;
138
139 drm_atomic_private_obj_init(mdp5_kms->dev, &mdp5_kms->glob_state,
140 &state->base,
141 &mdp5_global_state_funcs);
142 return 0;
143 }
144
mdp5_enable_commit(struct msm_kms * kms)145 static void mdp5_enable_commit(struct msm_kms *kms)
146 {
147 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
148 pm_runtime_get_sync(&mdp5_kms->pdev->dev);
149 }
150
mdp5_disable_commit(struct msm_kms * kms)151 static void mdp5_disable_commit(struct msm_kms *kms)
152 {
153 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
154 pm_runtime_put_sync(&mdp5_kms->pdev->dev);
155 }
156
mdp5_prepare_commit(struct msm_kms * kms,struct drm_atomic_state * state)157 static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
158 {
159 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
160 struct mdp5_global_state *global_state;
161
162 global_state = mdp5_get_existing_global_state(mdp5_kms);
163
164 if (mdp5_kms->smp)
165 mdp5_smp_prepare_commit(mdp5_kms->smp, &global_state->smp);
166 }
167
mdp5_flush_commit(struct msm_kms * kms,unsigned crtc_mask)168 static void mdp5_flush_commit(struct msm_kms *kms, unsigned crtc_mask)
169 {
170 /* TODO */
171 }
172
mdp5_wait_flush(struct msm_kms * kms,unsigned crtc_mask)173 static void mdp5_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
174 {
175 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
176 struct drm_crtc *crtc;
177
178 for_each_crtc_mask(mdp5_kms->dev, crtc, crtc_mask)
179 mdp5_crtc_wait_for_commit_done(crtc);
180 }
181
mdp5_complete_commit(struct msm_kms * kms,unsigned crtc_mask)182 static void mdp5_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
183 {
184 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
185 struct mdp5_global_state *global_state;
186
187 global_state = mdp5_get_existing_global_state(mdp5_kms);
188
189 if (mdp5_kms->smp)
190 mdp5_smp_complete_commit(mdp5_kms->smp, &global_state->smp);
191 }
192
mdp5_round_pixclk(struct msm_kms * kms,unsigned long rate,struct drm_encoder * encoder)193 static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
194 struct drm_encoder *encoder)
195 {
196 return rate;
197 }
198
mdp5_set_split_display(struct msm_kms * kms,struct drm_encoder * encoder,struct drm_encoder * slave_encoder,bool is_cmd_mode)199 static int mdp5_set_split_display(struct msm_kms *kms,
200 struct drm_encoder *encoder,
201 struct drm_encoder *slave_encoder,
202 bool is_cmd_mode)
203 {
204 if (is_cmd_mode)
205 return mdp5_cmd_encoder_set_split_display(encoder,
206 slave_encoder);
207 else
208 return mdp5_vid_encoder_set_split_display(encoder,
209 slave_encoder);
210 }
211
mdp5_kms_destroy(struct msm_kms * kms)212 static void mdp5_kms_destroy(struct msm_kms *kms)
213 {
214 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
215 struct msm_gem_address_space *aspace = kms->aspace;
216 int i;
217
218 for (i = 0; i < mdp5_kms->num_hwmixers; i++)
219 mdp5_mixer_destroy(mdp5_kms->hwmixers[i]);
220
221 for (i = 0; i < mdp5_kms->num_hwpipes; i++)
222 mdp5_pipe_destroy(mdp5_kms->hwpipes[i]);
223
224 if (aspace) {
225 aspace->mmu->funcs->detach(aspace->mmu);
226 msm_gem_address_space_put(aspace);
227 }
228
229 mdp_kms_destroy(&mdp5_kms->base);
230 }
231
232 #ifdef CONFIG_DEBUG_FS
smp_show(struct seq_file * m,void * arg)233 static int smp_show(struct seq_file *m, void *arg)
234 {
235 struct drm_info_node *node = (struct drm_info_node *) m->private;
236 struct drm_device *dev = node->minor->dev;
237 struct msm_drm_private *priv = dev->dev_private;
238 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
239 struct drm_printer p = drm_seq_file_printer(m);
240
241 if (!mdp5_kms->smp) {
242 drm_printf(&p, "no SMP pool\n");
243 return 0;
244 }
245
246 mdp5_smp_dump(mdp5_kms->smp, &p);
247
248 return 0;
249 }
250
251 static struct drm_info_list mdp5_debugfs_list[] = {
252 {"smp", smp_show },
253 };
254
mdp5_kms_debugfs_init(struct msm_kms * kms,struct drm_minor * minor)255 static int mdp5_kms_debugfs_init(struct msm_kms *kms, struct drm_minor *minor)
256 {
257 drm_debugfs_create_files(mdp5_debugfs_list,
258 ARRAY_SIZE(mdp5_debugfs_list),
259 minor->debugfs_root, minor);
260
261 return 0;
262 }
263 #endif
264
265 static const struct mdp_kms_funcs kms_funcs = {
266 .base = {
267 .hw_init = mdp5_hw_init,
268 .irq_preinstall = mdp5_irq_preinstall,
269 .irq_postinstall = mdp5_irq_postinstall,
270 .irq_uninstall = mdp5_irq_uninstall,
271 .irq = mdp5_irq,
272 .enable_vblank = mdp5_enable_vblank,
273 .disable_vblank = mdp5_disable_vblank,
274 .flush_commit = mdp5_flush_commit,
275 .enable_commit = mdp5_enable_commit,
276 .disable_commit = mdp5_disable_commit,
277 .prepare_commit = mdp5_prepare_commit,
278 .wait_flush = mdp5_wait_flush,
279 .complete_commit = mdp5_complete_commit,
280 .get_format = mdp_get_format,
281 .round_pixclk = mdp5_round_pixclk,
282 .set_split_display = mdp5_set_split_display,
283 .destroy = mdp5_kms_destroy,
284 #ifdef CONFIG_DEBUG_FS
285 .debugfs_init = mdp5_kms_debugfs_init,
286 #endif
287 },
288 .set_irqmask = mdp5_set_irqmask,
289 };
290
mdp5_disable(struct mdp5_kms * mdp5_kms)291 static int mdp5_disable(struct mdp5_kms *mdp5_kms)
292 {
293 DBG("");
294
295 mdp5_kms->enable_count--;
296 WARN_ON(mdp5_kms->enable_count < 0);
297
298 if (mdp5_kms->tbu_rt_clk)
299 clk_disable_unprepare(mdp5_kms->tbu_rt_clk);
300 if (mdp5_kms->tbu_clk)
301 clk_disable_unprepare(mdp5_kms->tbu_clk);
302 clk_disable_unprepare(mdp5_kms->ahb_clk);
303 clk_disable_unprepare(mdp5_kms->axi_clk);
304 clk_disable_unprepare(mdp5_kms->core_clk);
305 if (mdp5_kms->lut_clk)
306 clk_disable_unprepare(mdp5_kms->lut_clk);
307
308 return 0;
309 }
310
mdp5_enable(struct mdp5_kms * mdp5_kms)311 static int mdp5_enable(struct mdp5_kms *mdp5_kms)
312 {
313 DBG("");
314
315 mdp5_kms->enable_count++;
316
317 clk_prepare_enable(mdp5_kms->ahb_clk);
318 clk_prepare_enable(mdp5_kms->axi_clk);
319 clk_prepare_enable(mdp5_kms->core_clk);
320 if (mdp5_kms->lut_clk)
321 clk_prepare_enable(mdp5_kms->lut_clk);
322 if (mdp5_kms->tbu_clk)
323 clk_prepare_enable(mdp5_kms->tbu_clk);
324 if (mdp5_kms->tbu_rt_clk)
325 clk_prepare_enable(mdp5_kms->tbu_rt_clk);
326
327 return 0;
328 }
329
construct_encoder(struct mdp5_kms * mdp5_kms,struct mdp5_interface * intf,struct mdp5_ctl * ctl)330 static struct drm_encoder *construct_encoder(struct mdp5_kms *mdp5_kms,
331 struct mdp5_interface *intf,
332 struct mdp5_ctl *ctl)
333 {
334 struct drm_device *dev = mdp5_kms->dev;
335 struct msm_drm_private *priv = dev->dev_private;
336 struct drm_encoder *encoder;
337
338 encoder = mdp5_encoder_init(dev, intf, ctl);
339 if (IS_ERR(encoder)) {
340 DRM_DEV_ERROR(dev->dev, "failed to construct encoder\n");
341 return encoder;
342 }
343
344 priv->encoders[priv->num_encoders++] = encoder;
345
346 return encoder;
347 }
348
get_dsi_id_from_intf(const struct mdp5_cfg_hw * hw_cfg,int intf_num)349 static int get_dsi_id_from_intf(const struct mdp5_cfg_hw *hw_cfg, int intf_num)
350 {
351 const enum mdp5_intf_type *intfs = hw_cfg->intf.connect;
352 const int intf_cnt = ARRAY_SIZE(hw_cfg->intf.connect);
353 int id = 0, i;
354
355 for (i = 0; i < intf_cnt; i++) {
356 if (intfs[i] == INTF_DSI) {
357 if (intf_num == i)
358 return id;
359
360 id++;
361 }
362 }
363
364 return -EINVAL;
365 }
366
modeset_init_intf(struct mdp5_kms * mdp5_kms,struct mdp5_interface * intf)367 static int modeset_init_intf(struct mdp5_kms *mdp5_kms,
368 struct mdp5_interface *intf)
369 {
370 struct drm_device *dev = mdp5_kms->dev;
371 struct msm_drm_private *priv = dev->dev_private;
372 struct mdp5_ctl_manager *ctlm = mdp5_kms->ctlm;
373 struct mdp5_ctl *ctl;
374 struct drm_encoder *encoder;
375 int ret = 0;
376
377 switch (intf->type) {
378 case INTF_eDP:
379 if (!priv->edp)
380 break;
381
382 ctl = mdp5_ctlm_request(ctlm, intf->num);
383 if (!ctl) {
384 ret = -EINVAL;
385 break;
386 }
387
388 encoder = construct_encoder(mdp5_kms, intf, ctl);
389 if (IS_ERR(encoder)) {
390 ret = PTR_ERR(encoder);
391 break;
392 }
393
394 ret = msm_edp_modeset_init(priv->edp, dev, encoder);
395 break;
396 case INTF_HDMI:
397 if (!priv->hdmi)
398 break;
399
400 ctl = mdp5_ctlm_request(ctlm, intf->num);
401 if (!ctl) {
402 ret = -EINVAL;
403 break;
404 }
405
406 encoder = construct_encoder(mdp5_kms, intf, ctl);
407 if (IS_ERR(encoder)) {
408 ret = PTR_ERR(encoder);
409 break;
410 }
411
412 ret = msm_hdmi_modeset_init(priv->hdmi, dev, encoder);
413 break;
414 case INTF_DSI:
415 {
416 const struct mdp5_cfg_hw *hw_cfg =
417 mdp5_cfg_get_hw_config(mdp5_kms->cfg);
418 int dsi_id = get_dsi_id_from_intf(hw_cfg, intf->num);
419
420 if ((dsi_id >= ARRAY_SIZE(priv->dsi)) || (dsi_id < 0)) {
421 DRM_DEV_ERROR(dev->dev, "failed to find dsi from intf %d\n",
422 intf->num);
423 ret = -EINVAL;
424 break;
425 }
426
427 if (!priv->dsi[dsi_id])
428 break;
429
430 ctl = mdp5_ctlm_request(ctlm, intf->num);
431 if (!ctl) {
432 ret = -EINVAL;
433 break;
434 }
435
436 encoder = construct_encoder(mdp5_kms, intf, ctl);
437 if (IS_ERR(encoder)) {
438 ret = PTR_ERR(encoder);
439 break;
440 }
441
442 ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, encoder);
443 if (!ret)
444 mdp5_encoder_set_intf_mode(encoder, msm_dsi_is_cmd_mode(priv->dsi[dsi_id]));
445
446 break;
447 }
448 default:
449 DRM_DEV_ERROR(dev->dev, "unknown intf: %d\n", intf->type);
450 ret = -EINVAL;
451 break;
452 }
453
454 return ret;
455 }
456
modeset_init(struct mdp5_kms * mdp5_kms)457 static int modeset_init(struct mdp5_kms *mdp5_kms)
458 {
459 struct drm_device *dev = mdp5_kms->dev;
460 struct msm_drm_private *priv = dev->dev_private;
461 unsigned int num_crtcs;
462 int i, ret, pi = 0, ci = 0;
463 struct drm_plane *primary[MAX_BASES] = { NULL };
464 struct drm_plane *cursor[MAX_BASES] = { NULL };
465
466 /*
467 * Construct encoders and modeset initialize connector devices
468 * for each external display interface.
469 */
470 for (i = 0; i < mdp5_kms->num_intfs; i++) {
471 ret = modeset_init_intf(mdp5_kms, mdp5_kms->intfs[i]);
472 if (ret)
473 goto fail;
474 }
475
476 /*
477 * We should ideally have less number of encoders (set up by parsing
478 * the MDP5 interfaces) than the number of layer mixers present in HW,
479 * but let's be safe here anyway
480 */
481 num_crtcs = min(priv->num_encoders, mdp5_kms->num_hwmixers);
482
483 /*
484 * Construct planes equaling the number of hw pipes, and CRTCs for the
485 * N encoders set up by the driver. The first N planes become primary
486 * planes for the CRTCs, with the remainder as overlay planes:
487 */
488 for (i = 0; i < mdp5_kms->num_hwpipes; i++) {
489 struct mdp5_hw_pipe *hwpipe = mdp5_kms->hwpipes[i];
490 struct drm_plane *plane;
491 enum drm_plane_type type;
492
493 if (i < num_crtcs)
494 type = DRM_PLANE_TYPE_PRIMARY;
495 else if (hwpipe->caps & MDP_PIPE_CAP_CURSOR)
496 type = DRM_PLANE_TYPE_CURSOR;
497 else
498 type = DRM_PLANE_TYPE_OVERLAY;
499
500 plane = mdp5_plane_init(dev, type);
501 if (IS_ERR(plane)) {
502 ret = PTR_ERR(plane);
503 DRM_DEV_ERROR(dev->dev, "failed to construct plane %d (%d)\n", i, ret);
504 goto fail;
505 }
506 priv->planes[priv->num_planes++] = plane;
507
508 if (type == DRM_PLANE_TYPE_PRIMARY)
509 primary[pi++] = plane;
510 if (type == DRM_PLANE_TYPE_CURSOR)
511 cursor[ci++] = plane;
512 }
513
514 for (i = 0; i < num_crtcs; i++) {
515 struct drm_crtc *crtc;
516
517 crtc = mdp5_crtc_init(dev, primary[i], cursor[i], i);
518 if (IS_ERR(crtc)) {
519 ret = PTR_ERR(crtc);
520 DRM_DEV_ERROR(dev->dev, "failed to construct crtc %d (%d)\n", i, ret);
521 goto fail;
522 }
523 priv->crtcs[priv->num_crtcs++] = crtc;
524 }
525
526 /*
527 * Now that we know the number of crtcs we've created, set the possible
528 * crtcs for the encoders
529 */
530 for (i = 0; i < priv->num_encoders; i++) {
531 struct drm_encoder *encoder = priv->encoders[i];
532
533 encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;
534 }
535
536 return 0;
537
538 fail:
539 return ret;
540 }
541
read_mdp_hw_revision(struct mdp5_kms * mdp5_kms,u32 * major,u32 * minor)542 static void read_mdp_hw_revision(struct mdp5_kms *mdp5_kms,
543 u32 *major, u32 *minor)
544 {
545 struct device *dev = &mdp5_kms->pdev->dev;
546 u32 version;
547
548 pm_runtime_get_sync(dev);
549 version = mdp5_read(mdp5_kms, REG_MDP5_HW_VERSION);
550 pm_runtime_put_sync(dev);
551
552 *major = FIELD(version, MDP5_HW_VERSION_MAJOR);
553 *minor = FIELD(version, MDP5_HW_VERSION_MINOR);
554
555 DRM_DEV_INFO(dev, "MDP5 version v%d.%d", *major, *minor);
556 }
557
get_clk(struct platform_device * pdev,struct clk ** clkp,const char * name,bool mandatory)558 static int get_clk(struct platform_device *pdev, struct clk **clkp,
559 const char *name, bool mandatory)
560 {
561 struct device *dev = &pdev->dev;
562 struct clk *clk = msm_clk_get(pdev, name);
563 if (IS_ERR(clk) && mandatory) {
564 DRM_DEV_ERROR(dev, "failed to get %s (%ld)\n", name, PTR_ERR(clk));
565 return PTR_ERR(clk);
566 }
567 if (IS_ERR(clk))
568 DBG("skipping %s", name);
569 else
570 *clkp = clk;
571
572 return 0;
573 }
574
mdp5_kms_init(struct drm_device * dev)575 struct msm_kms *mdp5_kms_init(struct drm_device *dev)
576 {
577 struct msm_drm_private *priv = dev->dev_private;
578 struct platform_device *pdev;
579 struct mdp5_kms *mdp5_kms;
580 struct mdp5_cfg *config;
581 struct msm_kms *kms;
582 struct msm_gem_address_space *aspace;
583 int irq, i, ret;
584 struct device *iommu_dev;
585
586 /* priv->kms would have been populated by the MDP5 driver */
587 kms = priv->kms;
588 if (!kms)
589 return NULL;
590
591 mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
592 pdev = mdp5_kms->pdev;
593
594 ret = mdp_kms_init(&mdp5_kms->base, &kms_funcs);
595 if (ret) {
596 DRM_DEV_ERROR(&pdev->dev, "failed to init kms\n");
597 goto fail;
598 }
599
600 irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
601 if (!irq) {
602 ret = -EINVAL;
603 DRM_DEV_ERROR(&pdev->dev, "failed to get irq\n");
604 goto fail;
605 }
606
607 kms->irq = irq;
608
609 config = mdp5_cfg_get_config(mdp5_kms->cfg);
610
611 /* make sure things are off before attaching iommu (bootloader could
612 * have left things on, in which case we'll start getting faults if
613 * we don't disable):
614 */
615 pm_runtime_get_sync(&pdev->dev);
616 for (i = 0; i < MDP5_INTF_NUM_MAX; i++) {
617 if (mdp5_cfg_intf_is_virtual(config->hw->intf.connect[i]) ||
618 !config->hw->intf.base[i])
619 continue;
620 mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(i), 0);
621
622 mdp5_write(mdp5_kms, REG_MDP5_INTF_FRAME_LINE_COUNT_EN(i), 0x3);
623 }
624 mdelay(16);
625
626 if (config->platform.iommu) {
627 struct msm_mmu *mmu;
628
629 iommu_dev = &pdev->dev;
630 if (!dev_iommu_fwspec_get(iommu_dev))
631 iommu_dev = iommu_dev->parent;
632
633 mmu = msm_iommu_new(iommu_dev, config->platform.iommu);
634
635 aspace = msm_gem_address_space_create(mmu, "mdp5",
636 0x1000, 0x100000000 - 0x1000);
637
638 if (IS_ERR(aspace)) {
639 if (!IS_ERR(mmu))
640 mmu->funcs->destroy(mmu);
641 ret = PTR_ERR(aspace);
642 goto fail;
643 }
644
645 kms->aspace = aspace;
646 } else {
647 DRM_DEV_INFO(&pdev->dev,
648 "no iommu, fallback to phys contig buffers for scanout\n");
649 aspace = NULL;
650 }
651
652 pm_runtime_put_sync(&pdev->dev);
653
654 ret = modeset_init(mdp5_kms);
655 if (ret) {
656 DRM_DEV_ERROR(&pdev->dev, "modeset_init failed: %d\n", ret);
657 goto fail;
658 }
659
660 dev->mode_config.min_width = 0;
661 dev->mode_config.min_height = 0;
662 dev->mode_config.max_width = 0xffff;
663 dev->mode_config.max_height = 0xffff;
664
665 dev->max_vblank_count = 0; /* max_vblank_count is set on each CRTC */
666 dev->vblank_disable_immediate = true;
667
668 return kms;
669 fail:
670 if (kms)
671 mdp5_kms_destroy(kms);
672 return ERR_PTR(ret);
673 }
674
mdp5_destroy(struct platform_device * pdev)675 static void mdp5_destroy(struct platform_device *pdev)
676 {
677 struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
678 int i;
679
680 if (mdp5_kms->ctlm)
681 mdp5_ctlm_destroy(mdp5_kms->ctlm);
682 if (mdp5_kms->smp)
683 mdp5_smp_destroy(mdp5_kms->smp);
684 if (mdp5_kms->cfg)
685 mdp5_cfg_destroy(mdp5_kms->cfg);
686
687 for (i = 0; i < mdp5_kms->num_intfs; i++)
688 kfree(mdp5_kms->intfs[i]);
689
690 if (mdp5_kms->rpm_enabled)
691 pm_runtime_disable(&pdev->dev);
692
693 drm_atomic_private_obj_fini(&mdp5_kms->glob_state);
694 drm_modeset_lock_fini(&mdp5_kms->glob_state_lock);
695 }
696
construct_pipes(struct mdp5_kms * mdp5_kms,int cnt,const enum mdp5_pipe * pipes,const uint32_t * offsets,uint32_t caps)697 static int construct_pipes(struct mdp5_kms *mdp5_kms, int cnt,
698 const enum mdp5_pipe *pipes, const uint32_t *offsets,
699 uint32_t caps)
700 {
701 struct drm_device *dev = mdp5_kms->dev;
702 int i, ret;
703
704 for (i = 0; i < cnt; i++) {
705 struct mdp5_hw_pipe *hwpipe;
706
707 hwpipe = mdp5_pipe_init(pipes[i], offsets[i], caps);
708 if (IS_ERR(hwpipe)) {
709 ret = PTR_ERR(hwpipe);
710 DRM_DEV_ERROR(dev->dev, "failed to construct pipe for %s (%d)\n",
711 pipe2name(pipes[i]), ret);
712 return ret;
713 }
714 hwpipe->idx = mdp5_kms->num_hwpipes;
715 mdp5_kms->hwpipes[mdp5_kms->num_hwpipes++] = hwpipe;
716 }
717
718 return 0;
719 }
720
hwpipe_init(struct mdp5_kms * mdp5_kms)721 static int hwpipe_init(struct mdp5_kms *mdp5_kms)
722 {
723 static const enum mdp5_pipe rgb_planes[] = {
724 SSPP_RGB0, SSPP_RGB1, SSPP_RGB2, SSPP_RGB3,
725 };
726 static const enum mdp5_pipe vig_planes[] = {
727 SSPP_VIG0, SSPP_VIG1, SSPP_VIG2, SSPP_VIG3,
728 };
729 static const enum mdp5_pipe dma_planes[] = {
730 SSPP_DMA0, SSPP_DMA1,
731 };
732 static const enum mdp5_pipe cursor_planes[] = {
733 SSPP_CURSOR0, SSPP_CURSOR1,
734 };
735 const struct mdp5_cfg_hw *hw_cfg;
736 int ret;
737
738 hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
739
740 /* Construct RGB pipes: */
741 ret = construct_pipes(mdp5_kms, hw_cfg->pipe_rgb.count, rgb_planes,
742 hw_cfg->pipe_rgb.base, hw_cfg->pipe_rgb.caps);
743 if (ret)
744 return ret;
745
746 /* Construct video (VIG) pipes: */
747 ret = construct_pipes(mdp5_kms, hw_cfg->pipe_vig.count, vig_planes,
748 hw_cfg->pipe_vig.base, hw_cfg->pipe_vig.caps);
749 if (ret)
750 return ret;
751
752 /* Construct DMA pipes: */
753 ret = construct_pipes(mdp5_kms, hw_cfg->pipe_dma.count, dma_planes,
754 hw_cfg->pipe_dma.base, hw_cfg->pipe_dma.caps);
755 if (ret)
756 return ret;
757
758 /* Construct cursor pipes: */
759 ret = construct_pipes(mdp5_kms, hw_cfg->pipe_cursor.count,
760 cursor_planes, hw_cfg->pipe_cursor.base,
761 hw_cfg->pipe_cursor.caps);
762 if (ret)
763 return ret;
764
765 return 0;
766 }
767
hwmixer_init(struct mdp5_kms * mdp5_kms)768 static int hwmixer_init(struct mdp5_kms *mdp5_kms)
769 {
770 struct drm_device *dev = mdp5_kms->dev;
771 const struct mdp5_cfg_hw *hw_cfg;
772 int i, ret;
773
774 hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
775
776 for (i = 0; i < hw_cfg->lm.count; i++) {
777 struct mdp5_hw_mixer *mixer;
778
779 mixer = mdp5_mixer_init(&hw_cfg->lm.instances[i]);
780 if (IS_ERR(mixer)) {
781 ret = PTR_ERR(mixer);
782 DRM_DEV_ERROR(dev->dev, "failed to construct LM%d (%d)\n",
783 i, ret);
784 return ret;
785 }
786
787 mixer->idx = mdp5_kms->num_hwmixers;
788 mdp5_kms->hwmixers[mdp5_kms->num_hwmixers++] = mixer;
789 }
790
791 return 0;
792 }
793
interface_init(struct mdp5_kms * mdp5_kms)794 static int interface_init(struct mdp5_kms *mdp5_kms)
795 {
796 struct drm_device *dev = mdp5_kms->dev;
797 const struct mdp5_cfg_hw *hw_cfg;
798 const enum mdp5_intf_type *intf_types;
799 int i;
800
801 hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
802 intf_types = hw_cfg->intf.connect;
803
804 for (i = 0; i < ARRAY_SIZE(hw_cfg->intf.connect); i++) {
805 struct mdp5_interface *intf;
806
807 if (intf_types[i] == INTF_DISABLED)
808 continue;
809
810 intf = kzalloc(sizeof(*intf), GFP_KERNEL);
811 if (!intf) {
812 DRM_DEV_ERROR(dev->dev, "failed to construct INTF%d\n", i);
813 return -ENOMEM;
814 }
815
816 intf->num = i;
817 intf->type = intf_types[i];
818 intf->mode = MDP5_INTF_MODE_NONE;
819 intf->idx = mdp5_kms->num_intfs;
820 mdp5_kms->intfs[mdp5_kms->num_intfs++] = intf;
821 }
822
823 return 0;
824 }
825
mdp5_init(struct platform_device * pdev,struct drm_device * dev)826 static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
827 {
828 struct msm_drm_private *priv = dev->dev_private;
829 struct mdp5_kms *mdp5_kms;
830 struct mdp5_cfg *config;
831 u32 major, minor;
832 int ret;
833
834 mdp5_kms = devm_kzalloc(&pdev->dev, sizeof(*mdp5_kms), GFP_KERNEL);
835 if (!mdp5_kms) {
836 ret = -ENOMEM;
837 goto fail;
838 }
839
840 platform_set_drvdata(pdev, mdp5_kms);
841
842 spin_lock_init(&mdp5_kms->resource_lock);
843
844 mdp5_kms->dev = dev;
845 mdp5_kms->pdev = pdev;
846
847 ret = mdp5_global_obj_init(mdp5_kms);
848 if (ret)
849 goto fail;
850
851 mdp5_kms->mmio = msm_ioremap(pdev, "mdp_phys", "MDP5");
852 if (IS_ERR(mdp5_kms->mmio)) {
853 ret = PTR_ERR(mdp5_kms->mmio);
854 goto fail;
855 }
856
857 /* mandatory clocks: */
858 ret = get_clk(pdev, &mdp5_kms->axi_clk, "bus", true);
859 if (ret)
860 goto fail;
861 ret = get_clk(pdev, &mdp5_kms->ahb_clk, "iface", true);
862 if (ret)
863 goto fail;
864 ret = get_clk(pdev, &mdp5_kms->core_clk, "core", true);
865 if (ret)
866 goto fail;
867 ret = get_clk(pdev, &mdp5_kms->vsync_clk, "vsync", true);
868 if (ret)
869 goto fail;
870
871 /* optional clocks: */
872 get_clk(pdev, &mdp5_kms->lut_clk, "lut", false);
873 get_clk(pdev, &mdp5_kms->tbu_clk, "tbu", false);
874 get_clk(pdev, &mdp5_kms->tbu_rt_clk, "tbu_rt", false);
875
876 /* we need to set a default rate before enabling. Set a safe
877 * rate first, then figure out hw revision, and then set a
878 * more optimal rate:
879 */
880 clk_set_rate(mdp5_kms->core_clk, 200000000);
881
882 pm_runtime_enable(&pdev->dev);
883 mdp5_kms->rpm_enabled = true;
884
885 read_mdp_hw_revision(mdp5_kms, &major, &minor);
886
887 mdp5_kms->cfg = mdp5_cfg_init(mdp5_kms, major, minor);
888 if (IS_ERR(mdp5_kms->cfg)) {
889 ret = PTR_ERR(mdp5_kms->cfg);
890 mdp5_kms->cfg = NULL;
891 goto fail;
892 }
893
894 config = mdp5_cfg_get_config(mdp5_kms->cfg);
895 mdp5_kms->caps = config->hw->mdp.caps;
896
897 /* TODO: compute core clock rate at runtime */
898 clk_set_rate(mdp5_kms->core_clk, config->hw->max_clk);
899
900 /*
901 * Some chipsets have a Shared Memory Pool (SMP), while others
902 * have dedicated latency buffering per source pipe instead;
903 * this section initializes the SMP:
904 */
905 if (mdp5_kms->caps & MDP_CAP_SMP) {
906 mdp5_kms->smp = mdp5_smp_init(mdp5_kms, &config->hw->smp);
907 if (IS_ERR(mdp5_kms->smp)) {
908 ret = PTR_ERR(mdp5_kms->smp);
909 mdp5_kms->smp = NULL;
910 goto fail;
911 }
912 }
913
914 mdp5_kms->ctlm = mdp5_ctlm_init(dev, mdp5_kms->mmio, mdp5_kms->cfg);
915 if (IS_ERR(mdp5_kms->ctlm)) {
916 ret = PTR_ERR(mdp5_kms->ctlm);
917 mdp5_kms->ctlm = NULL;
918 goto fail;
919 }
920
921 ret = hwpipe_init(mdp5_kms);
922 if (ret)
923 goto fail;
924
925 ret = hwmixer_init(mdp5_kms);
926 if (ret)
927 goto fail;
928
929 ret = interface_init(mdp5_kms);
930 if (ret)
931 goto fail;
932
933 /* set uninit-ed kms */
934 priv->kms = &mdp5_kms->base.base;
935
936 return 0;
937 fail:
938 if (mdp5_kms)
939 mdp5_destroy(pdev);
940 return ret;
941 }
942
mdp5_bind(struct device * dev,struct device * master,void * data)943 static int mdp5_bind(struct device *dev, struct device *master, void *data)
944 {
945 struct drm_device *ddev = dev_get_drvdata(master);
946 struct platform_device *pdev = to_platform_device(dev);
947
948 DBG("");
949
950 return mdp5_init(pdev, ddev);
951 }
952
mdp5_unbind(struct device * dev,struct device * master,void * data)953 static void mdp5_unbind(struct device *dev, struct device *master,
954 void *data)
955 {
956 struct platform_device *pdev = to_platform_device(dev);
957
958 mdp5_destroy(pdev);
959 }
960
961 static const struct component_ops mdp5_ops = {
962 .bind = mdp5_bind,
963 .unbind = mdp5_unbind,
964 };
965
mdp5_setup_interconnect(struct platform_device * pdev)966 static int mdp5_setup_interconnect(struct platform_device *pdev)
967 {
968 struct icc_path *path0 = of_icc_get(&pdev->dev, "mdp0-mem");
969 struct icc_path *path1 = of_icc_get(&pdev->dev, "mdp1-mem");
970 struct icc_path *path_rot = of_icc_get(&pdev->dev, "rotator-mem");
971
972 if (IS_ERR(path0))
973 return PTR_ERR(path0);
974
975 if (!path0) {
976 /* no interconnect support is not necessarily a fatal
977 * condition, the platform may simply not have an
978 * interconnect driver yet. But warn about it in case
979 * bootloader didn't setup bus clocks high enough for
980 * scanout.
981 */
982 dev_warn(&pdev->dev, "No interconnect support may cause display underflows!\n");
983 return 0;
984 }
985
986 icc_set_bw(path0, 0, MBps_to_icc(6400));
987
988 if (!IS_ERR_OR_NULL(path1))
989 icc_set_bw(path1, 0, MBps_to_icc(6400));
990 if (!IS_ERR_OR_NULL(path_rot))
991 icc_set_bw(path_rot, 0, MBps_to_icc(6400));
992
993 return 0;
994 }
995
mdp5_dev_probe(struct platform_device * pdev)996 static int mdp5_dev_probe(struct platform_device *pdev)
997 {
998 int ret;
999
1000 DBG("");
1001
1002 ret = mdp5_setup_interconnect(pdev);
1003 if (ret)
1004 return ret;
1005
1006 return component_add(&pdev->dev, &mdp5_ops);
1007 }
1008
mdp5_dev_remove(struct platform_device * pdev)1009 static int mdp5_dev_remove(struct platform_device *pdev)
1010 {
1011 DBG("");
1012 component_del(&pdev->dev, &mdp5_ops);
1013 return 0;
1014 }
1015
mdp5_runtime_suspend(struct device * dev)1016 static __maybe_unused int mdp5_runtime_suspend(struct device *dev)
1017 {
1018 struct platform_device *pdev = to_platform_device(dev);
1019 struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
1020
1021 DBG("");
1022
1023 return mdp5_disable(mdp5_kms);
1024 }
1025
mdp5_runtime_resume(struct device * dev)1026 static __maybe_unused int mdp5_runtime_resume(struct device *dev)
1027 {
1028 struct platform_device *pdev = to_platform_device(dev);
1029 struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
1030
1031 DBG("");
1032
1033 return mdp5_enable(mdp5_kms);
1034 }
1035
1036 static const struct dev_pm_ops mdp5_pm_ops = {
1037 SET_RUNTIME_PM_OPS(mdp5_runtime_suspend, mdp5_runtime_resume, NULL)
1038 };
1039
1040 static const struct of_device_id mdp5_dt_match[] = {
1041 { .compatible = "qcom,mdp5", },
1042 /* to support downstream DT files */
1043 { .compatible = "qcom,mdss_mdp", },
1044 {}
1045 };
1046 MODULE_DEVICE_TABLE(of, mdp5_dt_match);
1047
1048 static struct platform_driver mdp5_driver = {
1049 .probe = mdp5_dev_probe,
1050 .remove = mdp5_dev_remove,
1051 .driver = {
1052 .name = "msm_mdp",
1053 .of_match_table = mdp5_dt_match,
1054 .pm = &mdp5_pm_ops,
1055 },
1056 };
1057
msm_mdp_register(void)1058 void __init msm_mdp_register(void)
1059 {
1060 DBG("");
1061 platform_driver_register(&mdp5_driver);
1062 }
1063
msm_mdp_unregister(void)1064 void __exit msm_mdp_unregister(void)
1065 {
1066 DBG("");
1067 platform_driver_unregister(&mdp5_driver);
1068 }
1069