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[linux.git] / drivers / gpu / drm / msm / dsi / dsi_manager.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
4  */
5
6 #include "msm_kms.h"
7 #include "dsi.h"
8
9 #define DSI_CLOCK_MASTER        DSI_0
10 #define DSI_CLOCK_SLAVE         DSI_1
11
12 #define DSI_LEFT                DSI_0
13 #define DSI_RIGHT               DSI_1
14
15 /* According to the current drm framework sequence, take the encoder of
16  * DSI_1 as master encoder
17  */
18 #define DSI_ENCODER_MASTER      DSI_1
19 #define DSI_ENCODER_SLAVE       DSI_0
20
21 struct msm_dsi_manager {
22         struct msm_dsi *dsi[DSI_MAX];
23
24         bool is_bonded_dsi;
25         bool is_sync_needed;
26         int master_dsi_link_id;
27 };
28
29 static struct msm_dsi_manager msm_dsim_glb;
30
31 #define IS_BONDED_DSI()         (msm_dsim_glb.is_bonded_dsi)
32 #define IS_SYNC_NEEDED()        (msm_dsim_glb.is_sync_needed)
33 #define IS_MASTER_DSI_LINK(id)  (msm_dsim_glb.master_dsi_link_id == id)
34
35 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
36 {
37         return msm_dsim_glb.dsi[id];
38 }
39
40 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
41 {
42         return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
43 }
44
45 static int dsi_mgr_parse_of(struct device_node *np, int id)
46 {
47         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
48
49         /* We assume 2 dsi nodes have the same information of bonded dsi and
50          * sync-mode, and only one node specifies master in case of bonded mode.
51          */
52         if (!msm_dsim->is_bonded_dsi)
53                 msm_dsim->is_bonded_dsi = of_property_read_bool(np, "qcom,dual-dsi-mode");
54
55         if (msm_dsim->is_bonded_dsi) {
56                 if (of_property_read_bool(np, "qcom,master-dsi"))
57                         msm_dsim->master_dsi_link_id = id;
58                 if (!msm_dsim->is_sync_needed)
59                         msm_dsim->is_sync_needed = of_property_read_bool(
60                                         np, "qcom,sync-dual-dsi");
61         }
62
63         return 0;
64 }
65
66 static int dsi_mgr_setup_components(int id)
67 {
68         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
69         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
70         struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
71         struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
72         int ret;
73
74         if (!IS_BONDED_DSI()) {
75                 ret = msm_dsi_host_register(msm_dsi->host);
76                 if (ret)
77                         return ret;
78
79                 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
80                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, msm_dsi->phy);
81         } else if (!other_dsi) {
82                 ret = 0;
83         } else {
84                 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
85                                                         msm_dsi : other_dsi;
86                 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
87                                                         other_dsi : msm_dsi;
88                 /* Register slave host first, so that slave DSI device
89                  * has a chance to probe, and do not block the master
90                  * DSI device's probe.
91                  * Also, do not check defer for the slave host,
92                  * because only master DSI device adds the panel to global
93                  * panel list. The panel's device is the master DSI device.
94                  */
95                 ret = msm_dsi_host_register(slave_link_dsi->host);
96                 if (ret)
97                         return ret;
98                 ret = msm_dsi_host_register(master_link_dsi->host);
99                 if (ret)
100                         return ret;
101
102                 /* PLL0 is to drive both 2 DSI link clocks in bonded DSI mode. */
103                 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
104                                         MSM_DSI_PHY_MASTER);
105                 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
106                                         MSM_DSI_PHY_SLAVE);
107                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, clk_master_dsi->phy);
108                 if (ret)
109                         return ret;
110                 ret = msm_dsi_host_set_src_pll(other_dsi->host, clk_master_dsi->phy);
111         }
112
113         return ret;
114 }
115
116 static int enable_phy(struct msm_dsi *msm_dsi,
117                       struct msm_dsi_phy_shared_timings *shared_timings)
118 {
119         struct msm_dsi_phy_clk_request clk_req;
120         int ret;
121         bool is_bonded_dsi = IS_BONDED_DSI();
122
123         msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_bonded_dsi);
124
125         ret = msm_dsi_phy_enable(msm_dsi->phy, &clk_req, shared_timings);
126
127         return ret;
128 }
129
130 static int
131 dsi_mgr_phy_enable(int id,
132                    struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
133 {
134         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
135         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
136         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
137         int ret;
138
139         /* In case of bonded DSI, some registers in PHY1 have been programmed
140          * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
141          * will silently reset those PHY1 registers. Therefore we need to reset
142          * and enable both PHYs before any PLL clock operation.
143          */
144         if (IS_BONDED_DSI() && mdsi && sdsi) {
145                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
146                         msm_dsi_host_reset_phy(mdsi->host);
147                         msm_dsi_host_reset_phy(sdsi->host);
148
149                         ret = enable_phy(mdsi,
150                                          &shared_timings[DSI_CLOCK_MASTER]);
151                         if (ret)
152                                 return ret;
153                         ret = enable_phy(sdsi,
154                                          &shared_timings[DSI_CLOCK_SLAVE]);
155                         if (ret) {
156                                 msm_dsi_phy_disable(mdsi->phy);
157                                 return ret;
158                         }
159                 }
160         } else {
161                 msm_dsi_host_reset_phy(msm_dsi->host);
162                 ret = enable_phy(msm_dsi, &shared_timings[id]);
163                 if (ret)
164                         return ret;
165         }
166
167         msm_dsi->phy_enabled = true;
168
169         return 0;
170 }
171
172 static void dsi_mgr_phy_disable(int id)
173 {
174         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
175         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
176         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
177
178         /* disable DSI phy
179          * In bonded dsi configuration, the phy should be disabled for the
180          * first controller only when the second controller is disabled.
181          */
182         msm_dsi->phy_enabled = false;
183         if (IS_BONDED_DSI() && mdsi && sdsi) {
184                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
185                         msm_dsi_phy_disable(sdsi->phy);
186                         msm_dsi_phy_disable(mdsi->phy);
187                 }
188         } else {
189                 msm_dsi_phy_disable(msm_dsi->phy);
190         }
191 }
192
193 struct dsi_connector {
194         struct drm_connector base;
195         int id;
196 };
197
198 struct dsi_bridge {
199         struct drm_bridge base;
200         int id;
201 };
202
203 #define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
204 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
205
206 static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
207 {
208         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
209         return dsi_connector->id;
210 }
211
212 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
213 {
214         struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
215         return dsi_bridge->id;
216 }
217
218 static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
219 {
220         struct msm_drm_private *priv = conn->dev->dev_private;
221         struct msm_kms *kms = priv->kms;
222         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
223         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
224         struct msm_dsi *master_dsi, *slave_dsi;
225         struct drm_panel *panel;
226
227         if (IS_BONDED_DSI() && !IS_MASTER_DSI_LINK(id)) {
228                 master_dsi = other_dsi;
229                 slave_dsi = msm_dsi;
230         } else {
231                 master_dsi = msm_dsi;
232                 slave_dsi = other_dsi;
233         }
234
235         /*
236          * There is only 1 panel in the global panel list for bonded DSI mode.
237          * Therefore slave dsi should get the drm_panel instance from master
238          * dsi.
239          */
240         panel = msm_dsi_host_get_panel(master_dsi->host);
241         if (IS_ERR(panel)) {
242                 DRM_ERROR("Could not find panel for %u (%ld)\n", msm_dsi->id,
243                           PTR_ERR(panel));
244                 return PTR_ERR(panel);
245         }
246
247         if (!panel || !IS_BONDED_DSI())
248                 goto out;
249
250         drm_object_attach_property(&conn->base,
251                                    conn->dev->mode_config.tile_property, 0);
252
253         /*
254          * Set split display info to kms once bonded DSI panel is connected to
255          * both hosts.
256          */
257         if (other_dsi && other_dsi->panel && kms->funcs->set_split_display) {
258                 kms->funcs->set_split_display(kms, master_dsi->encoder,
259                                               slave_dsi->encoder,
260                                               msm_dsi_is_cmd_mode(msm_dsi));
261         }
262
263 out:
264         msm_dsi->panel = panel;
265         return 0;
266 }
267
268 static enum drm_connector_status dsi_mgr_connector_detect(
269                 struct drm_connector *connector, bool force)
270 {
271         int id = dsi_mgr_connector_get_id(connector);
272         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
273
274         return msm_dsi->panel ? connector_status_connected :
275                 connector_status_disconnected;
276 }
277
278 static void dsi_mgr_connector_destroy(struct drm_connector *connector)
279 {
280         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
281
282         DBG("");
283
284         drm_connector_cleanup(connector);
285
286         kfree(dsi_connector);
287 }
288
289 static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
290 {
291         int id = dsi_mgr_connector_get_id(connector);
292         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
293         struct drm_panel *panel = msm_dsi->panel;
294         int num;
295
296         if (!panel)
297                 return 0;
298
299         /*
300          * In bonded DSI mode, we have one connector that can be
301          * attached to the drm_panel.
302          */
303         num = drm_panel_get_modes(panel, connector);
304         if (!num)
305                 return 0;
306
307         return num;
308 }
309
310 static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
311                                 struct drm_display_mode *mode)
312 {
313         int id = dsi_mgr_connector_get_id(connector);
314         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
315         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
316         struct msm_drm_private *priv = connector->dev->dev_private;
317         struct msm_kms *kms = priv->kms;
318         long actual, requested;
319
320         DBG("");
321         requested = 1000 * mode->clock;
322         actual = kms->funcs->round_pixclk(kms, requested, encoder);
323
324         DBG("requested=%ld, actual=%ld", requested, actual);
325         if (actual != requested)
326                 return MODE_CLOCK_RANGE;
327
328         return MODE_OK;
329 }
330
331 static struct drm_encoder *
332 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
333 {
334         int id = dsi_mgr_connector_get_id(connector);
335         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
336
337         DBG("");
338         return msm_dsi_get_encoder(msm_dsi);
339 }
340
341 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
342 {
343         int id = dsi_mgr_bridge_get_id(bridge);
344         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
345         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
346         struct mipi_dsi_host *host = msm_dsi->host;
347         struct drm_panel *panel = msm_dsi->panel;
348         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
349         bool is_bonded_dsi = IS_BONDED_DSI();
350         int ret;
351
352         DBG("id=%d", id);
353         if (!msm_dsi_device_connected(msm_dsi))
354                 return;
355
356         /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
357         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
358                 return;
359
360         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
361         if (ret)
362                 goto phy_en_fail;
363
364         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_bonded_dsi, msm_dsi->phy);
365         if (ret) {
366                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
367                 goto host_on_fail;
368         }
369
370         if (is_bonded_dsi && msm_dsi1) {
371                 ret = msm_dsi_host_power_on(msm_dsi1->host,
372                                 &phy_shared_timings[DSI_1], is_bonded_dsi, msm_dsi1->phy);
373                 if (ret) {
374                         pr_err("%s: power on host1 failed, %d\n",
375                                                         __func__, ret);
376                         goto host1_on_fail;
377                 }
378         }
379
380         /* Always call panel functions once, because even for dual panels,
381          * there is only one drm_panel instance.
382          */
383         if (panel) {
384                 ret = drm_panel_prepare(panel);
385                 if (ret) {
386                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
387                                                                 id, ret);
388                         goto panel_prep_fail;
389                 }
390         }
391
392         ret = msm_dsi_host_enable(host);
393         if (ret) {
394                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
395                 goto host_en_fail;
396         }
397
398         if (is_bonded_dsi && msm_dsi1) {
399                 ret = msm_dsi_host_enable(msm_dsi1->host);
400                 if (ret) {
401                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
402                         goto host1_en_fail;
403                 }
404         }
405
406         return;
407
408 host1_en_fail:
409         msm_dsi_host_disable(host);
410 host_en_fail:
411         if (panel)
412                 drm_panel_unprepare(panel);
413 panel_prep_fail:
414         if (is_bonded_dsi && msm_dsi1)
415                 msm_dsi_host_power_off(msm_dsi1->host);
416 host1_on_fail:
417         msm_dsi_host_power_off(host);
418 host_on_fail:
419         dsi_mgr_phy_disable(id);
420 phy_en_fail:
421         return;
422 }
423
424 void msm_dsi_manager_tpg_enable(void)
425 {
426         struct msm_dsi *m_dsi = dsi_mgr_get_dsi(DSI_0);
427         struct msm_dsi *s_dsi = dsi_mgr_get_dsi(DSI_1);
428
429         /* if dual dsi, trigger tpg on master first then slave */
430         if (m_dsi) {
431                 msm_dsi_host_test_pattern_en(m_dsi->host);
432                 if (IS_BONDED_DSI() && s_dsi)
433                         msm_dsi_host_test_pattern_en(s_dsi->host);
434         }
435 }
436
437 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
438 {
439         int id = dsi_mgr_bridge_get_id(bridge);
440         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
441         struct drm_panel *panel = msm_dsi->panel;
442         bool is_bonded_dsi = IS_BONDED_DSI();
443         int ret;
444
445         DBG("id=%d", id);
446         if (!msm_dsi_device_connected(msm_dsi))
447                 return;
448
449         /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
450         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
451                 return;
452
453         if (panel) {
454                 ret = drm_panel_enable(panel);
455                 if (ret) {
456                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
457                                                                         ret);
458                 }
459         }
460 }
461
462 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
463 {
464         int id = dsi_mgr_bridge_get_id(bridge);
465         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
466         struct drm_panel *panel = msm_dsi->panel;
467         bool is_bonded_dsi = IS_BONDED_DSI();
468         int ret;
469
470         DBG("id=%d", id);
471         if (!msm_dsi_device_connected(msm_dsi))
472                 return;
473
474         /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
475         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
476                 return;
477
478         if (panel) {
479                 ret = drm_panel_disable(panel);
480                 if (ret)
481                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
482                                                                         ret);
483         }
484 }
485
486 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
487 {
488         int id = dsi_mgr_bridge_get_id(bridge);
489         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
490         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
491         struct mipi_dsi_host *host = msm_dsi->host;
492         struct drm_panel *panel = msm_dsi->panel;
493         bool is_bonded_dsi = IS_BONDED_DSI();
494         int ret;
495
496         DBG("id=%d", id);
497
498         if (!msm_dsi_device_connected(msm_dsi))
499                 return;
500
501         /*
502          * Do nothing with the host if it is slave-DSI in case of bonded DSI.
503          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
504          * won't be diabled until both PHYs request disable.
505          */
506         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
507                 goto disable_phy;
508
509         ret = msm_dsi_host_disable(host);
510         if (ret)
511                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
512
513         if (is_bonded_dsi && msm_dsi1) {
514                 ret = msm_dsi_host_disable(msm_dsi1->host);
515                 if (ret)
516                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
517         }
518
519         if (panel) {
520                 ret = drm_panel_unprepare(panel);
521                 if (ret)
522                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
523                                                                 id, ret);
524         }
525
526         /* Save PHY status if it is a clock source */
527         msm_dsi_phy_pll_save_state(msm_dsi->phy);
528
529         ret = msm_dsi_host_power_off(host);
530         if (ret)
531                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
532
533         if (is_bonded_dsi && msm_dsi1) {
534                 ret = msm_dsi_host_power_off(msm_dsi1->host);
535                 if (ret)
536                         pr_err("%s: host1 power off failed, %d\n",
537                                                                 __func__, ret);
538         }
539
540 disable_phy:
541         dsi_mgr_phy_disable(id);
542 }
543
544 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
545                 const struct drm_display_mode *mode,
546                 const struct drm_display_mode *adjusted_mode)
547 {
548         int id = dsi_mgr_bridge_get_id(bridge);
549         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
550         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
551         struct mipi_dsi_host *host = msm_dsi->host;
552         bool is_bonded_dsi = IS_BONDED_DSI();
553
554         DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
555
556         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
557                 return;
558
559         msm_dsi_host_set_display_mode(host, adjusted_mode);
560         if (is_bonded_dsi && other_dsi)
561                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
562 }
563
564 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
565         .detect = dsi_mgr_connector_detect,
566         .fill_modes = drm_helper_probe_single_connector_modes,
567         .destroy = dsi_mgr_connector_destroy,
568         .reset = drm_atomic_helper_connector_reset,
569         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
570         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
571 };
572
573 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
574         .get_modes = dsi_mgr_connector_get_modes,
575         .mode_valid = dsi_mgr_connector_mode_valid,
576         .best_encoder = dsi_mgr_connector_best_encoder,
577 };
578
579 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
580         .pre_enable = dsi_mgr_bridge_pre_enable,
581         .enable = dsi_mgr_bridge_enable,
582         .disable = dsi_mgr_bridge_disable,
583         .post_disable = dsi_mgr_bridge_post_disable,
584         .mode_set = dsi_mgr_bridge_mode_set,
585 };
586
587 /* initialize connector when we're connected to a drm_panel */
588 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
589 {
590         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
591         struct drm_connector *connector = NULL;
592         struct dsi_connector *dsi_connector;
593         int ret;
594
595         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
596         if (!dsi_connector)
597                 return ERR_PTR(-ENOMEM);
598
599         dsi_connector->id = id;
600
601         connector = &dsi_connector->base;
602
603         ret = drm_connector_init(msm_dsi->dev, connector,
604                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
605         if (ret)
606                 return ERR_PTR(ret);
607
608         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
609
610         /* Enable HPD to let hpd event is handled
611          * when panel is attached to the host.
612          */
613         connector->polled = DRM_CONNECTOR_POLL_HPD;
614
615         /* Display driver doesn't support interlace now. */
616         connector->interlace_allowed = 0;
617         connector->doublescan_allowed = 0;
618
619         drm_connector_attach_encoder(connector, msm_dsi->encoder);
620
621         ret = msm_dsi_manager_panel_init(connector, id);
622         if (ret) {
623                 DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret);
624                 goto fail;
625         }
626
627         return connector;
628
629 fail:
630         connector->funcs->destroy(msm_dsi->connector);
631         return ERR_PTR(ret);
632 }
633
634 bool msm_dsi_manager_validate_current_config(u8 id)
635 {
636         bool is_bonded_dsi = IS_BONDED_DSI();
637
638         /*
639          * For bonded DSI, we only have one drm panel. For this
640          * use case, we register only one bridge/connector.
641          * Skip bridge/connector initialisation if it is
642          * slave-DSI for bonded DSI configuration.
643          */
644         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id)) {
645                 DBG("Skip bridge registration for slave DSI->id: %d\n", id);
646                 return false;
647         }
648         return true;
649 }
650
651 /* initialize bridge */
652 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
653 {
654         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
655         struct drm_bridge *bridge = NULL;
656         struct dsi_bridge *dsi_bridge;
657         struct drm_encoder *encoder;
658         int ret;
659
660         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
661                                 sizeof(*dsi_bridge), GFP_KERNEL);
662         if (!dsi_bridge) {
663                 ret = -ENOMEM;
664                 goto fail;
665         }
666
667         dsi_bridge->id = id;
668
669         encoder = msm_dsi->encoder;
670
671         bridge = &dsi_bridge->base;
672         bridge->funcs = &dsi_mgr_bridge_funcs;
673
674         ret = drm_bridge_attach(encoder, bridge, NULL, 0);
675         if (ret)
676                 goto fail;
677
678         return bridge;
679
680 fail:
681         if (bridge)
682                 msm_dsi_manager_bridge_destroy(bridge);
683
684         return ERR_PTR(ret);
685 }
686
687 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
688 {
689         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
690         struct drm_device *dev = msm_dsi->dev;
691         struct drm_encoder *encoder;
692         struct drm_bridge *int_bridge, *ext_bridge;
693         struct drm_connector *connector;
694         struct list_head *connector_list;
695
696         int_bridge = msm_dsi->bridge;
697         ext_bridge = msm_dsi->external_bridge =
698                         msm_dsi_host_get_bridge(msm_dsi->host);
699
700         encoder = msm_dsi->encoder;
701
702         /* link the internal dsi bridge to the external bridge */
703         drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
704
705         /*
706          * we need the drm_connector created by the external bridge
707          * driver (or someone else) to feed it to our driver's
708          * priv->connector[] list, mainly for msm_fbdev_init()
709          */
710         connector_list = &dev->mode_config.connector_list;
711
712         list_for_each_entry(connector, connector_list, head) {
713                 if (drm_connector_has_possible_encoder(connector, encoder))
714                         return connector;
715         }
716
717         return ERR_PTR(-ENODEV);
718 }
719
720 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
721 {
722 }
723
724 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
725 {
726         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
727         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
728         struct mipi_dsi_host *host = msm_dsi->host;
729         bool is_read = (msg->rx_buf && msg->rx_len);
730         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
731         int ret;
732
733         if (!msg->tx_buf || !msg->tx_len)
734                 return 0;
735
736         /* In bonded master case, panel requires the same commands sent to
737          * both DSI links. Host issues the command trigger to both links
738          * when DSI_1 calls the cmd transfer function, no matter it happens
739          * before or after DSI_0 cmd transfer.
740          */
741         if (need_sync && (id == DSI_0))
742                 return is_read ? msg->rx_len : msg->tx_len;
743
744         if (need_sync && msm_dsi0) {
745                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
746                 if (ret) {
747                         pr_err("%s: failed to prepare non-trigger host, %d\n",
748                                 __func__, ret);
749                         return ret;
750                 }
751         }
752         ret = msm_dsi_host_xfer_prepare(host, msg);
753         if (ret) {
754                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
755                 goto restore_host0;
756         }
757
758         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
759                         msm_dsi_host_cmd_tx(host, msg);
760
761         msm_dsi_host_xfer_restore(host, msg);
762
763 restore_host0:
764         if (need_sync && msm_dsi0)
765                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
766
767         return ret;
768 }
769
770 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
771 {
772         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
773         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
774         struct mipi_dsi_host *host = msm_dsi->host;
775
776         if (IS_SYNC_NEEDED() && (id == DSI_0))
777                 return false;
778
779         if (IS_SYNC_NEEDED() && msm_dsi0)
780                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
781
782         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
783
784         return true;
785 }
786
787 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
788 {
789         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
790         int id = msm_dsi->id;
791         int ret;
792
793         if (id >= DSI_MAX) {
794                 pr_err("%s: invalid id %d\n", __func__, id);
795                 return -EINVAL;
796         }
797
798         if (msm_dsim->dsi[id]) {
799                 pr_err("%s: dsi%d already registered\n", __func__, id);
800                 return -EBUSY;
801         }
802
803         msm_dsim->dsi[id] = msm_dsi;
804
805         ret = dsi_mgr_parse_of(msm_dsi->pdev->dev.of_node, id);
806         if (ret) {
807                 pr_err("%s: failed to parse OF DSI info\n", __func__);
808                 goto fail;
809         }
810
811         ret = dsi_mgr_setup_components(id);
812         if (ret) {
813                 pr_err("%s: failed to register mipi dsi host for DSI %d: %d\n",
814                         __func__, id, ret);
815                 goto fail;
816         }
817
818         return 0;
819
820 fail:
821         msm_dsim->dsi[id] = NULL;
822         return ret;
823 }
824
825 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
826 {
827         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
828
829         if (msm_dsi->host)
830                 msm_dsi_host_unregister(msm_dsi->host);
831
832         if (msm_dsi->id >= 0)
833                 msm_dsim->dsi[msm_dsi->id] = NULL;
834 }
835
836 bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi)
837 {
838         return IS_BONDED_DSI();
839 }
840
841 bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
842 {
843         return IS_MASTER_DSI_LINK(msm_dsi->id);
844 }
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