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