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1/*
2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include "msm_kms.h"
15#include "dsi.h"
16
17#define DSI_CLOCK_MASTER DSI_0
18#define DSI_CLOCK_SLAVE DSI_1
19
20#define DSI_LEFT DSI_0
21#define DSI_RIGHT DSI_1
22
23/* According to the current drm framework sequence, take the encoder of
24 * DSI_1 as master encoder
25 */
26#define DSI_ENCODER_MASTER DSI_1
27#define DSI_ENCODER_SLAVE DSI_0
28
29struct msm_dsi_manager {
30 struct msm_dsi *dsi[DSI_MAX];
31
32 bool is_dual_dsi;
33 bool is_sync_needed;
34 int master_dsi_link_id;
35};
36
37static struct msm_dsi_manager msm_dsim_glb;
38
39#define IS_DUAL_DSI() (msm_dsim_glb.is_dual_dsi)
40#define IS_SYNC_NEEDED() (msm_dsim_glb.is_sync_needed)
41#define IS_MASTER_DSI_LINK(id) (msm_dsim_glb.master_dsi_link_id == id)
42
43static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
44{
45 return msm_dsim_glb.dsi[id];
46}
47
48static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
49{
50 return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
51}
52
53static int dsi_mgr_parse_dual_dsi(struct device_node *np, int id)
54{
55 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
56
57 /* We assume 2 dsi nodes have the same information of dual-dsi and
58 * sync-mode, and only one node specifies master in case of dual mode.
59 */
60 if (!msm_dsim->is_dual_dsi)
61 msm_dsim->is_dual_dsi = of_property_read_bool(
62 np, "qcom,dual-dsi-mode");
63
64 if (msm_dsim->is_dual_dsi) {
65 if (of_property_read_bool(np, "qcom,master-dsi"))
66 msm_dsim->master_dsi_link_id = id;
67 if (!msm_dsim->is_sync_needed)
68 msm_dsim->is_sync_needed = of_property_read_bool(
69 np, "qcom,sync-dual-dsi");
70 }
71
72 return 0;
73}
74
75static int dsi_mgr_host_register(int id)
76{
77 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
78 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
79 struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
80 struct msm_dsi_pll *src_pll;
81 int ret;
82
83 if (!IS_DUAL_DSI()) {
84 ret = msm_dsi_host_register(msm_dsi->host, true);
85 if (ret)
86 return ret;
87
88 src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
89 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
90 } else if (!other_dsi) {
91 ret = 0;
92 } else {
93 struct msm_dsi *mdsi = IS_MASTER_DSI_LINK(id) ?
94 msm_dsi : other_dsi;
95 struct msm_dsi *sdsi = IS_MASTER_DSI_LINK(id) ?
96 other_dsi : msm_dsi;
97 /* Register slave host first, so that slave DSI device
98 * has a chance to probe, and do not block the master
99 * DSI device's probe.
100 * Also, do not check defer for the slave host,
101 * because only master DSI device adds the panel to global
102 * panel list. The panel's device is the master DSI device.
103 */
104 ret = msm_dsi_host_register(sdsi->host, false);
105 if (ret)
106 return ret;
107 ret = msm_dsi_host_register(mdsi->host, true);
108 if (ret)
109 return ret;
110
111 /* PLL0 is to drive both 2 DSI link clocks in Dual DSI mode. */
112 src_pll = msm_dsi_phy_get_pll(clk_master_dsi->phy);
113 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
114 if (ret)
115 return ret;
116 ret = msm_dsi_host_set_src_pll(other_dsi->host, src_pll);
117 }
118
119 return ret;
120}
121
122struct dsi_connector {
123 struct drm_connector base;
124 int id;
125};
126
127struct dsi_bridge {
128 struct drm_bridge base;
129 int id;
130};
131
132#define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
133#define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
134
135static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
136{
137 struct dsi_connector *dsi_connector = to_dsi_connector(connector);
138 return dsi_connector->id;
139}
140
141static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
142{
143 struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
144 return dsi_bridge->id;
145}
146
147static enum drm_connector_status dsi_mgr_connector_detect(
148 struct drm_connector *connector, bool force)
149{
150 int id = dsi_mgr_connector_get_id(connector);
151 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
152 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
153 struct msm_drm_private *priv = connector->dev->dev_private;
154 struct msm_kms *kms = priv->kms;
155
156 DBG("id=%d", id);
157 if (!msm_dsi->panel) {
158 msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
159 &msm_dsi->device_flags);
160
161 /* There is only 1 panel in the global panel list
162 * for dual DSI mode. Therefore slave dsi should get
163 * the drm_panel instance from master dsi, and
164 * keep using the panel flags got from the current DSI link.
165 */
166 if (!msm_dsi->panel && IS_DUAL_DSI() &&
167 !IS_MASTER_DSI_LINK(id) && other_dsi)
168 msm_dsi->panel = msm_dsi_host_get_panel(
169 other_dsi->host, NULL);
170
171 if (msm_dsi->panel && IS_DUAL_DSI())
172 drm_object_attach_property(&connector->base,
173 connector->dev->mode_config.tile_property, 0);
174
175 /* Set split display info to kms once dual DSI panel is
176 * connected to both hosts.
177 */
178 if (msm_dsi->panel && IS_DUAL_DSI() &&
179 other_dsi && other_dsi->panel) {
180 bool cmd_mode = !(msm_dsi->device_flags &
181 MIPI_DSI_MODE_VIDEO);
182 struct drm_encoder *encoder = msm_dsi_get_encoder(
183 dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
184 struct drm_encoder *slave_enc = msm_dsi_get_encoder(
185 dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
186
187 if (kms->funcs->set_split_display)
188 kms->funcs->set_split_display(kms, encoder,
189 slave_enc, cmd_mode);
190 else
191 pr_err("mdp does not support dual DSI\n");
192 }
193 }
194
195 return msm_dsi->panel ? connector_status_connected :
196 connector_status_disconnected;
197}
198
199static void dsi_mgr_connector_destroy(struct drm_connector *connector)
200{
201 struct dsi_connector *dsi_connector = to_dsi_connector(connector);
202
203 DBG("");
204
205 drm_connector_cleanup(connector);
206
207 kfree(dsi_connector);
208}
209
210static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
211{
212 struct drm_display_mode *mode, *m;
213
214 /* Only support left-right mode */
215 list_for_each_entry_safe(mode, m, &connector->probed_modes, head) {
216 mode->clock >>= 1;
217 mode->hdisplay >>= 1;
218 mode->hsync_start >>= 1;
219 mode->hsync_end >>= 1;
220 mode->htotal >>= 1;
221 drm_mode_set_name(mode);
222 }
223}
224
225static int dsi_dual_connector_tile_init(
226 struct drm_connector *connector, int id)
227{
228 struct drm_display_mode *mode;
229 /* Fake topology id */
230 char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'};
231
232 if (connector->tile_group) {
233 DBG("Tile property has been initialized");
234 return 0;
235 }
236
237 /* Use the first mode only for now */
238 mode = list_first_entry(&connector->probed_modes,
239 struct drm_display_mode,
240 head);
241 if (!mode)
242 return -EINVAL;
243
244 connector->tile_group = drm_mode_get_tile_group(
245 connector->dev, topo_id);
246 if (!connector->tile_group)
247 connector->tile_group = drm_mode_create_tile_group(
248 connector->dev, topo_id);
249 if (!connector->tile_group) {
250 pr_err("%s: failed to create tile group\n", __func__);
251 return -ENOMEM;
252 }
253
254 connector->has_tile = true;
255 connector->tile_is_single_monitor = true;
256
257 /* mode has been fixed */
258 connector->tile_h_size = mode->hdisplay;
259 connector->tile_v_size = mode->vdisplay;
260
261 /* Only support left-right mode */
262 connector->num_h_tile = 2;
263 connector->num_v_tile = 1;
264
265 connector->tile_v_loc = 0;
266 connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0;
267
268 return 0;
269}
270
271static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
272{
273 int id = dsi_mgr_connector_get_id(connector);
274 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
275 struct drm_panel *panel = msm_dsi->panel;
276 int ret, num;
277
278 if (!panel)
279 return 0;
280
281 /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode,
282 * panel should not attach to any connector.
283 * Only temporarily attach panel to the current connector here,
284 * to let panel set mode to this connector.
285 */
286 drm_panel_attach(panel, connector);
287 num = drm_panel_get_modes(panel);
288 drm_panel_detach(panel);
289 if (!num)
290 return 0;
291
292 if (IS_DUAL_DSI()) {
293 /* report half resolution to user */
294 dsi_dual_connector_fix_modes(connector);
295 ret = dsi_dual_connector_tile_init(connector, id);
296 if (ret)
297 return ret;
298 ret = drm_mode_connector_set_tile_property(connector);
299 if (ret) {
300 pr_err("%s: set tile property failed, %d\n",
301 __func__, ret);
302 return ret;
303 }
304 }
305
306 return num;
307}
308
309static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
310 struct drm_display_mode *mode)
311{
312 int id = dsi_mgr_connector_get_id(connector);
313 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
314 struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
315 struct msm_drm_private *priv = connector->dev->dev_private;
316 struct msm_kms *kms = priv->kms;
317 long actual, requested;
318
319 DBG("");
320 requested = 1000 * mode->clock;
321 actual = kms->funcs->round_pixclk(kms, requested, encoder);
322
323 DBG("requested=%ld, actual=%ld", requested, actual);
324 if (actual != requested)
325 return MODE_CLOCK_RANGE;
326
327 return MODE_OK;
328}
329
330static struct drm_encoder *
331dsi_mgr_connector_best_encoder(struct drm_connector *connector)
332{
333 int id = dsi_mgr_connector_get_id(connector);
334 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
335
336 DBG("");
337 return msm_dsi_get_encoder(msm_dsi);
338}
339
340static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
341{
342 int id = dsi_mgr_bridge_get_id(bridge);
343 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
344 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
345 struct mipi_dsi_host *host = msm_dsi->host;
346 struct drm_panel *panel = msm_dsi->panel;
347 bool is_dual_dsi = IS_DUAL_DSI();
348 int ret;
349
350 DBG("id=%d", id);
351 if (!msm_dsi_device_connected(msm_dsi) ||
352 (is_dual_dsi && (DSI_1 == id)))
353 return;
354
355 ret = msm_dsi_host_power_on(host);
356 if (ret) {
357 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
358 goto host_on_fail;
359 }
360
361 if (is_dual_dsi && msm_dsi1) {
362 ret = msm_dsi_host_power_on(msm_dsi1->host);
363 if (ret) {
364 pr_err("%s: power on host1 failed, %d\n",
365 __func__, ret);
366 goto host1_on_fail;
367 }
368 }
369
370 /* Always call panel functions once, because even for dual panels,
371 * there is only one drm_panel instance.
372 */
373 if (panel) {
374 ret = drm_panel_prepare(panel);
375 if (ret) {
376 pr_err("%s: prepare panel %d failed, %d\n", __func__,
377 id, ret);
378 goto panel_prep_fail;
379 }
380 }
381
382 ret = msm_dsi_host_enable(host);
383 if (ret) {
384 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
385 goto host_en_fail;
386 }
387
388 if (is_dual_dsi && msm_dsi1) {
389 ret = msm_dsi_host_enable(msm_dsi1->host);
390 if (ret) {
391 pr_err("%s: enable host1 failed, %d\n", __func__, ret);
392 goto host1_en_fail;
393 }
394 }
395
396 if (panel) {
397 ret = drm_panel_enable(panel);
398 if (ret) {
399 pr_err("%s: enable panel %d failed, %d\n", __func__, id,
400 ret);
401 goto panel_en_fail;
402 }
403 }
404
405 return;
406
407panel_en_fail:
408 if (is_dual_dsi && msm_dsi1)
409 msm_dsi_host_disable(msm_dsi1->host);
410host1_en_fail:
411 msm_dsi_host_disable(host);
412host_en_fail:
413 if (panel)
414 drm_panel_unprepare(panel);
415panel_prep_fail:
416 if (is_dual_dsi && msm_dsi1)
417 msm_dsi_host_power_off(msm_dsi1->host);
418host1_on_fail:
419 msm_dsi_host_power_off(host);
420host_on_fail:
421 return;
422}
423
424static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
425{
426 DBG("");
427}
428
429static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
430{
431 DBG("");
432}
433
434static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
435{
436 int id = dsi_mgr_bridge_get_id(bridge);
437 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
438 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
439 struct mipi_dsi_host *host = msm_dsi->host;
440 struct drm_panel *panel = msm_dsi->panel;
441 bool is_dual_dsi = IS_DUAL_DSI();
442 int ret;
443
444 DBG("id=%d", id);
445
446 if (!msm_dsi_device_connected(msm_dsi) ||
447 (is_dual_dsi && (DSI_1 == id)))
448 return;
449
450 if (panel) {
451 ret = drm_panel_disable(panel);
452 if (ret)
453 pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
454 ret);
455 }
456
457 ret = msm_dsi_host_disable(host);
458 if (ret)
459 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
460
461 if (is_dual_dsi && msm_dsi1) {
462 ret = msm_dsi_host_disable(msm_dsi1->host);
463 if (ret)
464 pr_err("%s: host1 disable failed, %d\n", __func__, ret);
465 }
466
467 if (panel) {
468 ret = drm_panel_unprepare(panel);
469 if (ret)
470 pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
471 id, ret);
472 }
473
474 ret = msm_dsi_host_power_off(host);
475 if (ret)
476 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
477
478 if (is_dual_dsi && msm_dsi1) {
479 ret = msm_dsi_host_power_off(msm_dsi1->host);
480 if (ret)
481 pr_err("%s: host1 power off failed, %d\n",
482 __func__, ret);
483 }
484}
485
486static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
487 struct drm_display_mode *mode,
488 struct drm_display_mode *adjusted_mode)
489{
490 int id = dsi_mgr_bridge_get_id(bridge);
491 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
492 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
493 struct mipi_dsi_host *host = msm_dsi->host;
494 bool is_dual_dsi = IS_DUAL_DSI();
495
496 DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
497 mode->base.id, mode->name,
498 mode->vrefresh, mode->clock,
499 mode->hdisplay, mode->hsync_start,
500 mode->hsync_end, mode->htotal,
501 mode->vdisplay, mode->vsync_start,
502 mode->vsync_end, mode->vtotal,
503 mode->type, mode->flags);
504
505 if (is_dual_dsi && (DSI_1 == id))
506 return;
507
508 msm_dsi_host_set_display_mode(host, adjusted_mode);
509 if (is_dual_dsi && other_dsi)
510 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
511}
512
513static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
514 .dpms = drm_atomic_helper_connector_dpms,
515 .detect = dsi_mgr_connector_detect,
516 .fill_modes = drm_helper_probe_single_connector_modes,
517 .destroy = dsi_mgr_connector_destroy,
518 .reset = drm_atomic_helper_connector_reset,
519 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
520 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
521};
522
523static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
524 .get_modes = dsi_mgr_connector_get_modes,
525 .mode_valid = dsi_mgr_connector_mode_valid,
526 .best_encoder = dsi_mgr_connector_best_encoder,
527};
528
529static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
530 .pre_enable = dsi_mgr_bridge_pre_enable,
531 .enable = dsi_mgr_bridge_enable,
532 .disable = dsi_mgr_bridge_disable,
533 .post_disable = dsi_mgr_bridge_post_disable,
534 .mode_set = dsi_mgr_bridge_mode_set,
535};
536
537/* initialize connector when we're connected to a drm_panel */
538struct drm_connector *msm_dsi_manager_connector_init(u8 id)
539{
540 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
541 struct drm_connector *connector = NULL;
542 struct dsi_connector *dsi_connector;
543 int ret, i;
544
545 dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
546 if (!dsi_connector)
547 return ERR_PTR(-ENOMEM);
548
549 dsi_connector->id = id;
550
551 connector = &dsi_connector->base;
552
553 ret = drm_connector_init(msm_dsi->dev, connector,
554 &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
555 if (ret)
556 return ERR_PTR(ret);
557
558 drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
559
560 /* Enable HPD to let hpd event is handled
561 * when panel is attached to the host.
562 */
563 connector->polled = DRM_CONNECTOR_POLL_HPD;
564
565 /* Display driver doesn't support interlace now. */
566 connector->interlace_allowed = 0;
567 connector->doublescan_allowed = 0;
568
569 for (i = 0; i < MSM_DSI_ENCODER_NUM; i++)
570 drm_mode_connector_attach_encoder(connector,
571 msm_dsi->encoders[i]);
572
573 return connector;
574}
575
576/* initialize bridge */
577struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
578{
579 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
580 struct drm_bridge *bridge = NULL;
581 struct dsi_bridge *dsi_bridge;
582 int ret;
583
584 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
585 sizeof(*dsi_bridge), GFP_KERNEL);
586 if (!dsi_bridge) {
587 ret = -ENOMEM;
588 goto fail;
589 }
590
591 dsi_bridge->id = id;
592
593 bridge = &dsi_bridge->base;
594 bridge->funcs = &dsi_mgr_bridge_funcs;
595
596 ret = drm_bridge_attach(msm_dsi->dev, bridge);
597 if (ret)
598 goto fail;
599
600 return bridge;
601
602fail:
603 if (bridge)
604 msm_dsi_manager_bridge_destroy(bridge);
605
606 return ERR_PTR(ret);
607}
608
609struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
610{
611 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
612 struct drm_device *dev = msm_dsi->dev;
613 struct drm_encoder *encoder;
614 struct drm_bridge *int_bridge, *ext_bridge;
615 struct drm_connector *connector;
616 struct list_head *connector_list;
617
618 int_bridge = msm_dsi->bridge;
619 ext_bridge = msm_dsi->external_bridge =
620 msm_dsi_host_get_bridge(msm_dsi->host);
621
622 /*
623 * HACK: we may not know the external DSI bridge device's mode
624 * flags here. We'll get to know them only when the device
625 * attaches to the dsi host. For now, assume the bridge supports
626 * DSI video mode
627 */
628 encoder = msm_dsi->encoders[MSM_DSI_VIDEO_ENCODER_ID];
629
630 /* link the internal dsi bridge to the external bridge */
631 int_bridge->next = ext_bridge;
632 /* set the external bridge's encoder as dsi's encoder */
633 ext_bridge->encoder = encoder;
634
635 drm_bridge_attach(dev, ext_bridge);
636
637 /*
638 * we need the drm_connector created by the external bridge
639 * driver (or someone else) to feed it to our driver's
640 * priv->connector[] list, mainly for msm_fbdev_init()
641 */
642 connector_list = &dev->mode_config.connector_list;
643
644 list_for_each_entry(connector, connector_list, head) {
645 int i;
646
647 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
648 if (connector->encoder_ids[i] == encoder->base.id)
649 return connector;
650 }
651 }
652
653 return ERR_PTR(-ENODEV);
654}
655
656void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
657{
658}
659
660int msm_dsi_manager_phy_enable(int id,
661 const unsigned long bit_rate, const unsigned long esc_rate,
662 u32 *clk_pre, u32 *clk_post)
663{
664 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
665 struct msm_dsi_phy *phy = msm_dsi->phy;
666 int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id;
667 struct msm_dsi_pll *pll = msm_dsi_phy_get_pll(msm_dsi->phy);
668 int ret;
669
670 ret = msm_dsi_phy_enable(phy, src_pll_id, bit_rate, esc_rate);
671 if (ret)
672 return ret;
673
674 /*
675 * Reset DSI PHY silently changes its PLL registers to reset status,
676 * which will confuse clock driver and result in wrong output rate of
677 * link clocks. Restore PLL status if its PLL is being used as clock
678 * source.
679 */
680 if (!IS_DUAL_DSI() || (id == DSI_CLOCK_MASTER)) {
681 ret = msm_dsi_pll_restore_state(pll);
682 if (ret) {
683 pr_err("%s: failed to restore pll state\n", __func__);
684 msm_dsi_phy_disable(phy);
685 return ret;
686 }
687 }
688
689 msm_dsi->phy_enabled = true;
690 msm_dsi_phy_get_clk_pre_post(phy, clk_pre, clk_post);
691
692 return 0;
693}
694
695void msm_dsi_manager_phy_disable(int id)
696{
697 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
698 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
699 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
700 struct msm_dsi_phy *phy = msm_dsi->phy;
701 struct msm_dsi_pll *pll = msm_dsi_phy_get_pll(msm_dsi->phy);
702
703 /* Save PLL status if it is a clock source */
704 if (!IS_DUAL_DSI() || (id == DSI_CLOCK_MASTER))
705 msm_dsi_pll_save_state(pll);
706
707 /* disable DSI phy
708 * In dual-dsi configuration, the phy should be disabled for the
709 * first controller only when the second controller is disabled.
710 */
711 msm_dsi->phy_enabled = false;
712 if (IS_DUAL_DSI() && mdsi && sdsi) {
713 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
714 msm_dsi_phy_disable(sdsi->phy);
715 msm_dsi_phy_disable(mdsi->phy);
716 }
717 } else {
718 msm_dsi_phy_disable(phy);
719 }
720}
721
722int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
723{
724 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
725 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
726 struct mipi_dsi_host *host = msm_dsi->host;
727 bool is_read = (msg->rx_buf && msg->rx_len);
728 bool need_sync = (IS_SYNC_NEEDED() && !is_read);
729 int ret;
730
731 if (!msg->tx_buf || !msg->tx_len)
732 return 0;
733
734 /* In dual master case, panel requires the same commands sent to
735 * both DSI links. Host issues the command trigger to both links
736 * when DSI_1 calls the cmd transfer function, no matter it happens
737 * before or after DSI_0 cmd transfer.
738 */
739 if (need_sync && (id == DSI_0))
740 return is_read ? msg->rx_len : msg->tx_len;
741
742 if (need_sync && msm_dsi0) {
743 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
744 if (ret) {
745 pr_err("%s: failed to prepare non-trigger host, %d\n",
746 __func__, ret);
747 return ret;
748 }
749 }
750 ret = msm_dsi_host_xfer_prepare(host, msg);
751 if (ret) {
752 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
753 goto restore_host0;
754 }
755
756 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
757 msm_dsi_host_cmd_tx(host, msg);
758
759 msm_dsi_host_xfer_restore(host, msg);
760
761restore_host0:
762 if (need_sync && msm_dsi0)
763 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
764
765 return ret;
766}
767
768bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
769{
770 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
771 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
772 struct mipi_dsi_host *host = msm_dsi->host;
773
774 if (IS_SYNC_NEEDED() && (id == DSI_0))
775 return false;
776
777 if (IS_SYNC_NEEDED() && msm_dsi0)
778 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
779
780 msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
781
782 return true;
783}
784
785int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
786{
787 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
788 int id = msm_dsi->id;
789 int ret;
790
791 if (id > DSI_MAX) {
792 pr_err("%s: invalid id %d\n", __func__, id);
793 return -EINVAL;
794 }
795
796 if (msm_dsim->dsi[id]) {
797 pr_err("%s: dsi%d already registered\n", __func__, id);
798 return -EBUSY;
799 }
800
801 msm_dsim->dsi[id] = msm_dsi;
802
803 ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
804 if (ret) {
805 pr_err("%s: failed to parse dual DSI info\n", __func__);
806 goto fail;
807 }
808
809 ret = dsi_mgr_host_register(id);
810 if (ret) {
811 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
812 __func__, id);
813 goto fail;
814 }
815
816 return 0;
817
818fail:
819 msm_dsim->dsi[id] = NULL;
820 return ret;
821}
822
823void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
824{
825 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
826
827 if (msm_dsi->host)
828 msm_dsi_host_unregister(msm_dsi->host);
829 msm_dsim->dsi[msm_dsi->id] = NULL;
830}
831
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
37#ifdef CONFIG_OF
38static bool dsi_mgr_power_on_early(struct drm_bridge *bridge)
39{
40 struct drm_bridge *next_bridge = drm_bridge_get_next_bridge(bridge);
41
42 /*
43 * If the next bridge in the chain is the Parade ps8640 bridge chip
44 * then don't power on early since it seems to violate the expectations
45 * of the firmware that the bridge chip is running.
46 *
47 * NOTE: this is expected to be a temporary special case. It's expected
48 * that we'll eventually have a framework that allows the next level
49 * bridge to indicate whether it needs us to power on before it or
50 * after it. When that framework is in place then we'll use it and
51 * remove this special case.
52 */
53 return !(next_bridge && next_bridge->of_node &&
54 of_device_is_compatible(next_bridge->of_node, "parade,ps8640"));
55}
56#else
57static inline bool dsi_mgr_power_on_early(struct drm_bridge *bridge)
58{
59 return true;
60}
61#endif
62
63static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
64{
65 return msm_dsim_glb.dsi[id];
66}
67
68static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
69{
70 return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
71}
72
73static int dsi_mgr_parse_of(struct device_node *np, int id)
74{
75 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
76
77 /* We assume 2 dsi nodes have the same information of bonded dsi and
78 * sync-mode, and only one node specifies master in case of bonded mode.
79 */
80 if (!msm_dsim->is_bonded_dsi)
81 msm_dsim->is_bonded_dsi = of_property_read_bool(np, "qcom,dual-dsi-mode");
82
83 if (msm_dsim->is_bonded_dsi) {
84 if (of_property_read_bool(np, "qcom,master-dsi"))
85 msm_dsim->master_dsi_link_id = id;
86 if (!msm_dsim->is_sync_needed)
87 msm_dsim->is_sync_needed = of_property_read_bool(
88 np, "qcom,sync-dual-dsi");
89 }
90
91 return 0;
92}
93
94static int dsi_mgr_setup_components(int id)
95{
96 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
97 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
98 struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
99 struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
100 int ret;
101
102 if (!IS_BONDED_DSI()) {
103 ret = msm_dsi_host_register(msm_dsi->host);
104 if (ret)
105 return ret;
106
107 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
108 msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
109 } else if (other_dsi) {
110 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
111 msm_dsi : other_dsi;
112 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
113 other_dsi : msm_dsi;
114 /* Register slave host first, so that slave DSI device
115 * has a chance to probe, and do not block the master
116 * DSI device's probe.
117 * Also, do not check defer for the slave host,
118 * because only master DSI device adds the panel to global
119 * panel list. The panel's device is the master DSI device.
120 */
121 ret = msm_dsi_host_register(slave_link_dsi->host);
122 if (ret)
123 return ret;
124 ret = msm_dsi_host_register(master_link_dsi->host);
125 if (ret)
126 return ret;
127
128 /* PLL0 is to drive both 2 DSI link clocks in bonded DSI mode. */
129 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
130 MSM_DSI_PHY_MASTER);
131 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
132 MSM_DSI_PHY_SLAVE);
133 msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
134 msm_dsi_host_set_phy_mode(other_dsi->host, other_dsi->phy);
135 }
136
137 return 0;
138}
139
140static int enable_phy(struct msm_dsi *msm_dsi,
141 struct msm_dsi_phy_shared_timings *shared_timings)
142{
143 struct msm_dsi_phy_clk_request clk_req;
144 bool is_bonded_dsi = IS_BONDED_DSI();
145
146 msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_bonded_dsi);
147
148 return msm_dsi_phy_enable(msm_dsi->phy, &clk_req, shared_timings);
149}
150
151static int
152dsi_mgr_phy_enable(int id,
153 struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
154{
155 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
156 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
157 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
158 int ret;
159
160 /* In case of bonded DSI, some registers in PHY1 have been programmed
161 * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
162 * will silently reset those PHY1 registers. Therefore we need to reset
163 * and enable both PHYs before any PLL clock operation.
164 */
165 if (IS_BONDED_DSI() && mdsi && sdsi) {
166 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
167 msm_dsi_host_reset_phy(mdsi->host);
168 msm_dsi_host_reset_phy(sdsi->host);
169
170 ret = enable_phy(mdsi,
171 &shared_timings[DSI_CLOCK_MASTER]);
172 if (ret)
173 return ret;
174 ret = enable_phy(sdsi,
175 &shared_timings[DSI_CLOCK_SLAVE]);
176 if (ret) {
177 msm_dsi_phy_disable(mdsi->phy);
178 return ret;
179 }
180 }
181 } else {
182 msm_dsi_host_reset_phy(msm_dsi->host);
183 ret = enable_phy(msm_dsi, &shared_timings[id]);
184 if (ret)
185 return ret;
186 }
187
188 msm_dsi->phy_enabled = true;
189
190 return 0;
191}
192
193static void dsi_mgr_phy_disable(int id)
194{
195 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
196 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
197 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
198
199 /* disable DSI phy
200 * In bonded dsi configuration, the phy should be disabled for the
201 * first controller only when the second controller is disabled.
202 */
203 msm_dsi->phy_enabled = false;
204 if (IS_BONDED_DSI() && mdsi && sdsi) {
205 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
206 msm_dsi_phy_disable(sdsi->phy);
207 msm_dsi_phy_disable(mdsi->phy);
208 }
209 } else {
210 msm_dsi_phy_disable(msm_dsi->phy);
211 }
212}
213
214struct dsi_bridge {
215 struct drm_bridge base;
216 int id;
217};
218
219#define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
220
221static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
222{
223 struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
224 return dsi_bridge->id;
225}
226
227static void msm_dsi_manager_set_split_display(u8 id)
228{
229 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
230 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
231 struct msm_drm_private *priv = msm_dsi->dev->dev_private;
232 struct msm_kms *kms = priv->kms;
233 struct msm_dsi *master_dsi, *slave_dsi;
234
235 if (IS_BONDED_DSI() && !IS_MASTER_DSI_LINK(id)) {
236 master_dsi = other_dsi;
237 slave_dsi = msm_dsi;
238 } else {
239 master_dsi = msm_dsi;
240 slave_dsi = other_dsi;
241 }
242
243 if (!msm_dsi->external_bridge || !IS_BONDED_DSI())
244 return;
245
246 /*
247 * Set split display info to kms once bonded DSI panel is connected to
248 * both hosts.
249 */
250 if (other_dsi && other_dsi->external_bridge && kms->funcs->set_split_display) {
251 kms->funcs->set_split_display(kms, master_dsi->encoder,
252 slave_dsi->encoder,
253 msm_dsi_is_cmd_mode(msm_dsi));
254 }
255}
256
257static void dsi_mgr_bridge_power_on(struct drm_bridge *bridge)
258{
259 int id = dsi_mgr_bridge_get_id(bridge);
260 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
261 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
262 struct mipi_dsi_host *host = msm_dsi->host;
263 struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
264 bool is_bonded_dsi = IS_BONDED_DSI();
265 int ret;
266
267 DBG("id=%d", id);
268 if (!msm_dsi_device_connected(msm_dsi))
269 return;
270
271 /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
272 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
273 return;
274
275 ret = dsi_mgr_phy_enable(id, phy_shared_timings);
276 if (ret)
277 goto phy_en_fail;
278
279 ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_bonded_dsi, msm_dsi->phy);
280 if (ret) {
281 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
282 goto host_on_fail;
283 }
284
285 if (is_bonded_dsi && msm_dsi1) {
286 ret = msm_dsi_host_power_on(msm_dsi1->host,
287 &phy_shared_timings[DSI_1], is_bonded_dsi, msm_dsi1->phy);
288 if (ret) {
289 pr_err("%s: power on host1 failed, %d\n",
290 __func__, ret);
291 goto host1_on_fail;
292 }
293 }
294
295 /*
296 * Enable before preparing the panel, disable after unpreparing, so
297 * that the panel can communicate over the DSI link.
298 */
299 msm_dsi_host_enable_irq(host);
300 if (is_bonded_dsi && msm_dsi1)
301 msm_dsi_host_enable_irq(msm_dsi1->host);
302
303 return;
304
305host1_on_fail:
306 msm_dsi_host_power_off(host);
307host_on_fail:
308 dsi_mgr_phy_disable(id);
309phy_en_fail:
310 return;
311}
312
313static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
314{
315 int id = dsi_mgr_bridge_get_id(bridge);
316 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
317 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
318 struct mipi_dsi_host *host = msm_dsi->host;
319 bool is_bonded_dsi = IS_BONDED_DSI();
320 int ret;
321
322 DBG("id=%d", id);
323 if (!msm_dsi_device_connected(msm_dsi))
324 return;
325
326 /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
327 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
328 return;
329
330 if (!dsi_mgr_power_on_early(bridge))
331 dsi_mgr_bridge_power_on(bridge);
332
333 ret = msm_dsi_host_enable(host);
334 if (ret) {
335 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
336 goto host_en_fail;
337 }
338
339 if (is_bonded_dsi && msm_dsi1) {
340 ret = msm_dsi_host_enable(msm_dsi1->host);
341 if (ret) {
342 pr_err("%s: enable host1 failed, %d\n", __func__, ret);
343 goto host1_en_fail;
344 }
345 }
346
347 return;
348
349host1_en_fail:
350 msm_dsi_host_disable(host);
351host_en_fail:
352
353 return;
354}
355
356void msm_dsi_manager_tpg_enable(void)
357{
358 struct msm_dsi *m_dsi = dsi_mgr_get_dsi(DSI_0);
359 struct msm_dsi *s_dsi = dsi_mgr_get_dsi(DSI_1);
360
361 /* if dual dsi, trigger tpg on master first then slave */
362 if (m_dsi) {
363 msm_dsi_host_test_pattern_en(m_dsi->host);
364 if (IS_BONDED_DSI() && s_dsi)
365 msm_dsi_host_test_pattern_en(s_dsi->host);
366 }
367}
368
369static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
370{
371 int id = dsi_mgr_bridge_get_id(bridge);
372 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
373 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
374 struct mipi_dsi_host *host = msm_dsi->host;
375 bool is_bonded_dsi = IS_BONDED_DSI();
376 int ret;
377
378 DBG("id=%d", id);
379
380 if (!msm_dsi_device_connected(msm_dsi))
381 return;
382
383 /*
384 * Do nothing with the host if it is slave-DSI in case of bonded DSI.
385 * It is safe to call dsi_mgr_phy_disable() here because a single PHY
386 * won't be diabled until both PHYs request disable.
387 */
388 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
389 goto disable_phy;
390
391 ret = msm_dsi_host_disable(host);
392 if (ret)
393 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
394
395 if (is_bonded_dsi && msm_dsi1) {
396 ret = msm_dsi_host_disable(msm_dsi1->host);
397 if (ret)
398 pr_err("%s: host1 disable failed, %d\n", __func__, ret);
399 }
400
401 msm_dsi_host_disable_irq(host);
402 if (is_bonded_dsi && msm_dsi1)
403 msm_dsi_host_disable_irq(msm_dsi1->host);
404
405 /* Save PHY status if it is a clock source */
406 msm_dsi_phy_pll_save_state(msm_dsi->phy);
407
408 ret = msm_dsi_host_power_off(host);
409 if (ret)
410 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
411
412 if (is_bonded_dsi && msm_dsi1) {
413 ret = msm_dsi_host_power_off(msm_dsi1->host);
414 if (ret)
415 pr_err("%s: host1 power off failed, %d\n",
416 __func__, ret);
417 }
418
419disable_phy:
420 dsi_mgr_phy_disable(id);
421}
422
423static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
424 const struct drm_display_mode *mode,
425 const struct drm_display_mode *adjusted_mode)
426{
427 int id = dsi_mgr_bridge_get_id(bridge);
428 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
429 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
430 struct mipi_dsi_host *host = msm_dsi->host;
431 bool is_bonded_dsi = IS_BONDED_DSI();
432
433 DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
434
435 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
436 return;
437
438 msm_dsi_host_set_display_mode(host, adjusted_mode);
439 if (is_bonded_dsi && other_dsi)
440 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
441
442 if (dsi_mgr_power_on_early(bridge))
443 dsi_mgr_bridge_power_on(bridge);
444}
445
446static enum drm_mode_status dsi_mgr_bridge_mode_valid(struct drm_bridge *bridge,
447 const struct drm_display_info *info,
448 const struct drm_display_mode *mode)
449{
450 int id = dsi_mgr_bridge_get_id(bridge);
451 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
452 struct mipi_dsi_host *host = msm_dsi->host;
453
454 return msm_dsi_host_check_dsc(host, mode);
455}
456
457static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
458 .pre_enable = dsi_mgr_bridge_pre_enable,
459 .post_disable = dsi_mgr_bridge_post_disable,
460 .mode_set = dsi_mgr_bridge_mode_set,
461 .mode_valid = dsi_mgr_bridge_mode_valid,
462};
463
464/* initialize bridge */
465struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
466{
467 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
468 struct drm_bridge *bridge = NULL;
469 struct dsi_bridge *dsi_bridge;
470 struct drm_encoder *encoder;
471 int ret;
472
473 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
474 sizeof(*dsi_bridge), GFP_KERNEL);
475 if (!dsi_bridge) {
476 ret = -ENOMEM;
477 goto fail;
478 }
479
480 dsi_bridge->id = id;
481
482 encoder = msm_dsi->encoder;
483
484 bridge = &dsi_bridge->base;
485 bridge->funcs = &dsi_mgr_bridge_funcs;
486
487 drm_bridge_add(bridge);
488
489 ret = drm_bridge_attach(encoder, bridge, NULL, 0);
490 if (ret)
491 goto fail;
492
493 return bridge;
494
495fail:
496 if (bridge)
497 msm_dsi_manager_bridge_destroy(bridge);
498
499 return ERR_PTR(ret);
500}
501
502int msm_dsi_manager_ext_bridge_init(u8 id)
503{
504 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
505 struct drm_device *dev = msm_dsi->dev;
506 struct drm_encoder *encoder;
507 struct drm_bridge *int_bridge, *ext_bridge;
508 int ret;
509
510 int_bridge = msm_dsi->bridge;
511 ext_bridge = devm_drm_of_get_bridge(&msm_dsi->pdev->dev,
512 msm_dsi->pdev->dev.of_node, 1, 0);
513 if (IS_ERR(ext_bridge))
514 return PTR_ERR(ext_bridge);
515
516 msm_dsi->external_bridge = ext_bridge;
517
518 encoder = msm_dsi->encoder;
519
520 /*
521 * Try first to create the bridge without it creating its own
522 * connector.. currently some bridges support this, and others
523 * do not (and some support both modes)
524 */
525 ret = drm_bridge_attach(encoder, ext_bridge, int_bridge,
526 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
527 if (ret == -EINVAL) {
528 /*
529 * link the internal dsi bridge to the external bridge,
530 * connector is created by the next bridge.
531 */
532 ret = drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
533 if (ret < 0)
534 return ret;
535 } else {
536 struct drm_connector *connector;
537
538 /* We are in charge of the connector, create one now. */
539 connector = drm_bridge_connector_init(dev, encoder);
540 if (IS_ERR(connector)) {
541 DRM_ERROR("Unable to create bridge connector\n");
542 return PTR_ERR(connector);
543 }
544
545 ret = drm_connector_attach_encoder(connector, encoder);
546 if (ret < 0)
547 return ret;
548 }
549
550 /* The pipeline is ready, ping encoders if necessary */
551 msm_dsi_manager_set_split_display(id);
552
553 return 0;
554}
555
556void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
557{
558 drm_bridge_remove(bridge);
559}
560
561int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
562{
563 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
564 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
565 struct mipi_dsi_host *host = msm_dsi->host;
566 bool is_read = (msg->rx_buf && msg->rx_len);
567 bool need_sync = (IS_SYNC_NEEDED() && !is_read);
568 int ret;
569
570 if (!msg->tx_buf || !msg->tx_len)
571 return 0;
572
573 /* In bonded master case, panel requires the same commands sent to
574 * both DSI links. Host issues the command trigger to both links
575 * when DSI_1 calls the cmd transfer function, no matter it happens
576 * before or after DSI_0 cmd transfer.
577 */
578 if (need_sync && (id == DSI_0))
579 return is_read ? msg->rx_len : msg->tx_len;
580
581 if (need_sync && msm_dsi0) {
582 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
583 if (ret) {
584 pr_err("%s: failed to prepare non-trigger host, %d\n",
585 __func__, ret);
586 return ret;
587 }
588 }
589 ret = msm_dsi_host_xfer_prepare(host, msg);
590 if (ret) {
591 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
592 goto restore_host0;
593 }
594
595 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
596 msm_dsi_host_cmd_tx(host, msg);
597
598 msm_dsi_host_xfer_restore(host, msg);
599
600restore_host0:
601 if (need_sync && msm_dsi0)
602 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
603
604 return ret;
605}
606
607bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
608{
609 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
610 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
611 struct mipi_dsi_host *host = msm_dsi->host;
612
613 if (IS_SYNC_NEEDED() && (id == DSI_0))
614 return false;
615
616 if (IS_SYNC_NEEDED() && msm_dsi0)
617 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
618
619 msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
620
621 return true;
622}
623
624int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
625{
626 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
627 int id = msm_dsi->id;
628 int ret;
629
630 if (id >= DSI_MAX) {
631 pr_err("%s: invalid id %d\n", __func__, id);
632 return -EINVAL;
633 }
634
635 if (msm_dsim->dsi[id]) {
636 pr_err("%s: dsi%d already registered\n", __func__, id);
637 return -EBUSY;
638 }
639
640 msm_dsim->dsi[id] = msm_dsi;
641
642 ret = dsi_mgr_parse_of(msm_dsi->pdev->dev.of_node, id);
643 if (ret) {
644 pr_err("%s: failed to parse OF DSI info\n", __func__);
645 goto fail;
646 }
647
648 ret = dsi_mgr_setup_components(id);
649 if (ret) {
650 pr_err("%s: failed to register mipi dsi host for DSI %d: %d\n",
651 __func__, id, ret);
652 goto fail;
653 }
654
655 return 0;
656
657fail:
658 msm_dsim->dsi[id] = NULL;
659 return ret;
660}
661
662void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
663{
664 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
665
666 if (msm_dsi->host)
667 msm_dsi_host_unregister(msm_dsi->host);
668
669 if (msm_dsi->id >= 0)
670 msm_dsim->dsi[msm_dsi->id] = NULL;
671}
672
673bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi)
674{
675 return IS_BONDED_DSI();
676}
677
678bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
679{
680 return IS_MASTER_DSI_LINK(msm_dsi->id);
681}