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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 DBG("");
202 drm_connector_unregister(connector);
203 drm_connector_cleanup(connector);
204}
205
206static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
207{
208 struct drm_display_mode *mode, *m;
209
210 /* Only support left-right mode */
211 list_for_each_entry_safe(mode, m, &connector->probed_modes, head) {
212 mode->clock >>= 1;
213 mode->hdisplay >>= 1;
214 mode->hsync_start >>= 1;
215 mode->hsync_end >>= 1;
216 mode->htotal >>= 1;
217 drm_mode_set_name(mode);
218 }
219}
220
221static int dsi_dual_connector_tile_init(
222 struct drm_connector *connector, int id)
223{
224 struct drm_display_mode *mode;
225 /* Fake topology id */
226 char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'};
227
228 if (connector->tile_group) {
229 DBG("Tile property has been initialized");
230 return 0;
231 }
232
233 /* Use the first mode only for now */
234 mode = list_first_entry(&connector->probed_modes,
235 struct drm_display_mode,
236 head);
237 if (!mode)
238 return -EINVAL;
239
240 connector->tile_group = drm_mode_get_tile_group(
241 connector->dev, topo_id);
242 if (!connector->tile_group)
243 connector->tile_group = drm_mode_create_tile_group(
244 connector->dev, topo_id);
245 if (!connector->tile_group) {
246 pr_err("%s: failed to create tile group\n", __func__);
247 return -ENOMEM;
248 }
249
250 connector->has_tile = true;
251 connector->tile_is_single_monitor = true;
252
253 /* mode has been fixed */
254 connector->tile_h_size = mode->hdisplay;
255 connector->tile_v_size = mode->vdisplay;
256
257 /* Only support left-right mode */
258 connector->num_h_tile = 2;
259 connector->num_v_tile = 1;
260
261 connector->tile_v_loc = 0;
262 connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0;
263
264 return 0;
265}
266
267static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
268{
269 int id = dsi_mgr_connector_get_id(connector);
270 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
271 struct drm_panel *panel = msm_dsi->panel;
272 int ret, num;
273
274 if (!panel)
275 return 0;
276
277 /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode,
278 * panel should not attach to any connector.
279 * Only temporarily attach panel to the current connector here,
280 * to let panel set mode to this connector.
281 */
282 drm_panel_attach(panel, connector);
283 num = drm_panel_get_modes(panel);
284 drm_panel_detach(panel);
285 if (!num)
286 return 0;
287
288 if (IS_DUAL_DSI()) {
289 /* report half resolution to user */
290 dsi_dual_connector_fix_modes(connector);
291 ret = dsi_dual_connector_tile_init(connector, id);
292 if (ret)
293 return ret;
294 ret = drm_mode_connector_set_tile_property(connector);
295 if (ret) {
296 pr_err("%s: set tile property failed, %d\n",
297 __func__, ret);
298 return ret;
299 }
300 }
301
302 return num;
303}
304
305static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
306 struct drm_display_mode *mode)
307{
308 int id = dsi_mgr_connector_get_id(connector);
309 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
310 struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
311 struct msm_drm_private *priv = connector->dev->dev_private;
312 struct msm_kms *kms = priv->kms;
313 long actual, requested;
314
315 DBG("");
316 requested = 1000 * mode->clock;
317 actual = kms->funcs->round_pixclk(kms, requested, encoder);
318
319 DBG("requested=%ld, actual=%ld", requested, actual);
320 if (actual != requested)
321 return MODE_CLOCK_RANGE;
322
323 return MODE_OK;
324}
325
326static struct drm_encoder *
327dsi_mgr_connector_best_encoder(struct drm_connector *connector)
328{
329 int id = dsi_mgr_connector_get_id(connector);
330 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
331
332 DBG("");
333 return msm_dsi_get_encoder(msm_dsi);
334}
335
336static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
337{
338 int id = dsi_mgr_bridge_get_id(bridge);
339 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
340 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
341 struct mipi_dsi_host *host = msm_dsi->host;
342 struct drm_panel *panel = msm_dsi->panel;
343 bool is_dual_dsi = IS_DUAL_DSI();
344 int ret;
345
346 DBG("id=%d", id);
347 if (!msm_dsi_device_connected(msm_dsi) ||
348 (is_dual_dsi && (DSI_1 == id)))
349 return;
350
351 ret = msm_dsi_host_power_on(host);
352 if (ret) {
353 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
354 goto host_on_fail;
355 }
356
357 if (is_dual_dsi && msm_dsi1) {
358 ret = msm_dsi_host_power_on(msm_dsi1->host);
359 if (ret) {
360 pr_err("%s: power on host1 failed, %d\n",
361 __func__, ret);
362 goto host1_on_fail;
363 }
364 }
365
366 /* Always call panel functions once, because even for dual panels,
367 * there is only one drm_panel instance.
368 */
369 if (panel) {
370 ret = drm_panel_prepare(panel);
371 if (ret) {
372 pr_err("%s: prepare panel %d failed, %d\n", __func__,
373 id, ret);
374 goto panel_prep_fail;
375 }
376 }
377
378 ret = msm_dsi_host_enable(host);
379 if (ret) {
380 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
381 goto host_en_fail;
382 }
383
384 if (is_dual_dsi && msm_dsi1) {
385 ret = msm_dsi_host_enable(msm_dsi1->host);
386 if (ret) {
387 pr_err("%s: enable host1 failed, %d\n", __func__, ret);
388 goto host1_en_fail;
389 }
390 }
391
392 if (panel) {
393 ret = drm_panel_enable(panel);
394 if (ret) {
395 pr_err("%s: enable panel %d failed, %d\n", __func__, id,
396 ret);
397 goto panel_en_fail;
398 }
399 }
400
401 return;
402
403panel_en_fail:
404 if (is_dual_dsi && msm_dsi1)
405 msm_dsi_host_disable(msm_dsi1->host);
406host1_en_fail:
407 msm_dsi_host_disable(host);
408host_en_fail:
409 if (panel)
410 drm_panel_unprepare(panel);
411panel_prep_fail:
412 if (is_dual_dsi && msm_dsi1)
413 msm_dsi_host_power_off(msm_dsi1->host);
414host1_on_fail:
415 msm_dsi_host_power_off(host);
416host_on_fail:
417 return;
418}
419
420static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
421{
422 DBG("");
423}
424
425static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
426{
427 DBG("");
428}
429
430static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
431{
432 int id = dsi_mgr_bridge_get_id(bridge);
433 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
434 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
435 struct mipi_dsi_host *host = msm_dsi->host;
436 struct drm_panel *panel = msm_dsi->panel;
437 bool is_dual_dsi = IS_DUAL_DSI();
438 int ret;
439
440 DBG("id=%d", id);
441
442 if (!msm_dsi_device_connected(msm_dsi) ||
443 (is_dual_dsi && (DSI_1 == id)))
444 return;
445
446 if (panel) {
447 ret = drm_panel_disable(panel);
448 if (ret)
449 pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
450 ret);
451 }
452
453 ret = msm_dsi_host_disable(host);
454 if (ret)
455 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
456
457 if (is_dual_dsi && msm_dsi1) {
458 ret = msm_dsi_host_disable(msm_dsi1->host);
459 if (ret)
460 pr_err("%s: host1 disable failed, %d\n", __func__, ret);
461 }
462
463 if (panel) {
464 ret = drm_panel_unprepare(panel);
465 if (ret)
466 pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
467 id, ret);
468 }
469
470 ret = msm_dsi_host_power_off(host);
471 if (ret)
472 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
473
474 if (is_dual_dsi && msm_dsi1) {
475 ret = msm_dsi_host_power_off(msm_dsi1->host);
476 if (ret)
477 pr_err("%s: host1 power off failed, %d\n",
478 __func__, ret);
479 }
480}
481
482static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
483 struct drm_display_mode *mode,
484 struct drm_display_mode *adjusted_mode)
485{
486 int id = dsi_mgr_bridge_get_id(bridge);
487 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
488 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
489 struct mipi_dsi_host *host = msm_dsi->host;
490 bool is_dual_dsi = IS_DUAL_DSI();
491
492 DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
493 mode->base.id, mode->name,
494 mode->vrefresh, mode->clock,
495 mode->hdisplay, mode->hsync_start,
496 mode->hsync_end, mode->htotal,
497 mode->vdisplay, mode->vsync_start,
498 mode->vsync_end, mode->vtotal,
499 mode->type, mode->flags);
500
501 if (is_dual_dsi && (DSI_1 == id))
502 return;
503
504 msm_dsi_host_set_display_mode(host, adjusted_mode);
505 if (is_dual_dsi && other_dsi)
506 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
507}
508
509static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
510 .dpms = drm_atomic_helper_connector_dpms,
511 .detect = dsi_mgr_connector_detect,
512 .fill_modes = drm_helper_probe_single_connector_modes,
513 .destroy = dsi_mgr_connector_destroy,
514 .reset = drm_atomic_helper_connector_reset,
515 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
516 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
517};
518
519static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
520 .get_modes = dsi_mgr_connector_get_modes,
521 .mode_valid = dsi_mgr_connector_mode_valid,
522 .best_encoder = dsi_mgr_connector_best_encoder,
523};
524
525static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
526 .pre_enable = dsi_mgr_bridge_pre_enable,
527 .enable = dsi_mgr_bridge_enable,
528 .disable = dsi_mgr_bridge_disable,
529 .post_disable = dsi_mgr_bridge_post_disable,
530 .mode_set = dsi_mgr_bridge_mode_set,
531};
532
533/* initialize connector when we're connected to a drm_panel */
534struct drm_connector *msm_dsi_manager_connector_init(u8 id)
535{
536 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
537 struct drm_connector *connector = NULL;
538 struct dsi_connector *dsi_connector;
539 int ret, i;
540
541 dsi_connector = devm_kzalloc(msm_dsi->dev->dev,
542 sizeof(*dsi_connector), GFP_KERNEL);
543 if (!dsi_connector) {
544 ret = -ENOMEM;
545 goto fail;
546 }
547
548 dsi_connector->id = id;
549
550 connector = &dsi_connector->base;
551
552 ret = drm_connector_init(msm_dsi->dev, connector,
553 &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
554 if (ret)
555 goto fail;
556
557 drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
558
559 /* Enable HPD to let hpd event is handled
560 * when panel is attached to the host.
561 */
562 connector->polled = DRM_CONNECTOR_POLL_HPD;
563
564 /* Display driver doesn't support interlace now. */
565 connector->interlace_allowed = 0;
566 connector->doublescan_allowed = 0;
567
568 ret = drm_connector_register(connector);
569 if (ret)
570 goto fail;
571
572 for (i = 0; i < MSM_DSI_ENCODER_NUM; i++)
573 drm_mode_connector_attach_encoder(connector,
574 msm_dsi->encoders[i]);
575
576 return connector;
577
578fail:
579 if (connector)
580 dsi_mgr_connector_destroy(connector);
581
582 return ERR_PTR(ret);
583}
584
585/* initialize bridge */
586struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
587{
588 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
589 struct drm_bridge *bridge = NULL;
590 struct dsi_bridge *dsi_bridge;
591 int ret;
592
593 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
594 sizeof(*dsi_bridge), GFP_KERNEL);
595 if (!dsi_bridge) {
596 ret = -ENOMEM;
597 goto fail;
598 }
599
600 dsi_bridge->id = id;
601
602 bridge = &dsi_bridge->base;
603 bridge->funcs = &dsi_mgr_bridge_funcs;
604
605 ret = drm_bridge_attach(msm_dsi->dev, bridge);
606 if (ret)
607 goto fail;
608
609 return bridge;
610
611fail:
612 if (bridge)
613 msm_dsi_manager_bridge_destroy(bridge);
614
615 return ERR_PTR(ret);
616}
617
618struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
619{
620 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
621 struct drm_device *dev = msm_dsi->dev;
622 struct drm_encoder *encoder;
623 struct drm_bridge *int_bridge, *ext_bridge;
624 struct drm_connector *connector;
625 struct list_head *connector_list;
626
627 int_bridge = msm_dsi->bridge;
628 ext_bridge = msm_dsi->external_bridge =
629 msm_dsi_host_get_bridge(msm_dsi->host);
630
631 /*
632 * HACK: we may not know the external DSI bridge device's mode
633 * flags here. We'll get to know them only when the device
634 * attaches to the dsi host. For now, assume the bridge supports
635 * DSI video mode
636 */
637 encoder = msm_dsi->encoders[MSM_DSI_VIDEO_ENCODER_ID];
638
639 /* link the internal dsi bridge to the external bridge */
640 int_bridge->next = ext_bridge;
641 /* set the external bridge's encoder as dsi's encoder */
642 ext_bridge->encoder = encoder;
643
644 drm_bridge_attach(dev, ext_bridge);
645
646 /*
647 * we need the drm_connector created by the external bridge
648 * driver (or someone else) to feed it to our driver's
649 * priv->connector[] list, mainly for msm_fbdev_init()
650 */
651 connector_list = &dev->mode_config.connector_list;
652
653 list_for_each_entry(connector, connector_list, head) {
654 int i;
655
656 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
657 if (connector->encoder_ids[i] == encoder->base.id)
658 return connector;
659 }
660 }
661
662 return ERR_PTR(-ENODEV);
663}
664
665void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
666{
667}
668
669int msm_dsi_manager_phy_enable(int id,
670 const unsigned long bit_rate, const unsigned long esc_rate,
671 u32 *clk_pre, u32 *clk_post)
672{
673 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
674 struct msm_dsi_phy *phy = msm_dsi->phy;
675 int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id;
676 struct msm_dsi_pll *pll = msm_dsi_phy_get_pll(msm_dsi->phy);
677 int ret;
678
679 ret = msm_dsi_phy_enable(phy, src_pll_id, bit_rate, esc_rate);
680 if (ret)
681 return ret;
682
683 /*
684 * Reset DSI PHY silently changes its PLL registers to reset status,
685 * which will confuse clock driver and result in wrong output rate of
686 * link clocks. Restore PLL status if its PLL is being used as clock
687 * source.
688 */
689 if (!IS_DUAL_DSI() || (id == DSI_CLOCK_MASTER)) {
690 ret = msm_dsi_pll_restore_state(pll);
691 if (ret) {
692 pr_err("%s: failed to restore pll state\n", __func__);
693 msm_dsi_phy_disable(phy);
694 return ret;
695 }
696 }
697
698 msm_dsi->phy_enabled = true;
699 msm_dsi_phy_get_clk_pre_post(phy, clk_pre, clk_post);
700
701 return 0;
702}
703
704void msm_dsi_manager_phy_disable(int id)
705{
706 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
707 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
708 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
709 struct msm_dsi_phy *phy = msm_dsi->phy;
710 struct msm_dsi_pll *pll = msm_dsi_phy_get_pll(msm_dsi->phy);
711
712 /* Save PLL status if it is a clock source */
713 if (!IS_DUAL_DSI() || (id == DSI_CLOCK_MASTER))
714 msm_dsi_pll_save_state(pll);
715
716 /* disable DSI phy
717 * In dual-dsi configuration, the phy should be disabled for the
718 * first controller only when the second controller is disabled.
719 */
720 msm_dsi->phy_enabled = false;
721 if (IS_DUAL_DSI() && mdsi && sdsi) {
722 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
723 msm_dsi_phy_disable(sdsi->phy);
724 msm_dsi_phy_disable(mdsi->phy);
725 }
726 } else {
727 msm_dsi_phy_disable(phy);
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_host_register(id);
819 if (ret) {
820 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
821 __func__, id);
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 msm_dsim->dsi[msm_dsi->id] = NULL;
839}
840
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_setup_components(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 *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
81 struct msm_dsi_pll *src_pll;
82 int ret;
83
84 if (!IS_DUAL_DSI()) {
85 ret = msm_dsi_host_register(msm_dsi->host, true);
86 if (ret)
87 return ret;
88
89 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
90 src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
91 if (IS_ERR(src_pll))
92 return PTR_ERR(src_pll);
93 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
94 } else if (!other_dsi) {
95 ret = 0;
96 } else {
97 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
98 msm_dsi : other_dsi;
99 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
100 other_dsi : msm_dsi;
101 /* Register slave host first, so that slave DSI device
102 * has a chance to probe, and do not block the master
103 * DSI device's probe.
104 * Also, do not check defer for the slave host,
105 * because only master DSI device adds the panel to global
106 * panel list. The panel's device is the master DSI device.
107 */
108 ret = msm_dsi_host_register(slave_link_dsi->host, false);
109 if (ret)
110 return ret;
111 ret = msm_dsi_host_register(master_link_dsi->host, true);
112 if (ret)
113 return ret;
114
115 /* PLL0 is to drive both 2 DSI link clocks in Dual DSI mode. */
116 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
117 MSM_DSI_PHY_MASTER);
118 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
119 MSM_DSI_PHY_SLAVE);
120 src_pll = msm_dsi_phy_get_pll(clk_master_dsi->phy);
121 if (IS_ERR(src_pll))
122 return PTR_ERR(src_pll);
123 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
124 if (ret)
125 return ret;
126 ret = msm_dsi_host_set_src_pll(other_dsi->host, src_pll);
127 }
128
129 return ret;
130}
131
132static int enable_phy(struct msm_dsi *msm_dsi, int src_pll_id,
133 struct msm_dsi_phy_shared_timings *shared_timings)
134{
135 struct msm_dsi_phy_clk_request clk_req;
136 int ret;
137
138 msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req);
139
140 ret = msm_dsi_phy_enable(msm_dsi->phy, src_pll_id, &clk_req);
141 msm_dsi_phy_get_shared_timings(msm_dsi->phy, shared_timings);
142
143 return ret;
144}
145
146static int
147dsi_mgr_phy_enable(int id,
148 struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
149{
150 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
151 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
152 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
153 int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id;
154 int ret;
155
156 /* In case of dual DSI, some registers in PHY1 have been programmed
157 * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
158 * will silently reset those PHY1 registers. Therefore we need to reset
159 * and enable both PHYs before any PLL clock operation.
160 */
161 if (IS_DUAL_DSI() && mdsi && sdsi) {
162 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
163 msm_dsi_host_reset_phy(mdsi->host);
164 msm_dsi_host_reset_phy(sdsi->host);
165
166 ret = enable_phy(mdsi, src_pll_id,
167 &shared_timings[DSI_CLOCK_MASTER]);
168 if (ret)
169 return ret;
170 ret = enable_phy(sdsi, src_pll_id,
171 &shared_timings[DSI_CLOCK_SLAVE]);
172 if (ret) {
173 msm_dsi_phy_disable(mdsi->phy);
174 return ret;
175 }
176 }
177 } else {
178 msm_dsi_host_reset_phy(msm_dsi->host);
179 ret = enable_phy(msm_dsi, src_pll_id, &shared_timings[id]);
180 if (ret)
181 return ret;
182 }
183
184 msm_dsi->phy_enabled = true;
185
186 return 0;
187}
188
189static void dsi_mgr_phy_disable(int id)
190{
191 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
192 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
193 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
194
195 /* disable DSI phy
196 * In dual-dsi configuration, the phy should be disabled for the
197 * first controller only when the second controller is disabled.
198 */
199 msm_dsi->phy_enabled = false;
200 if (IS_DUAL_DSI() && mdsi && sdsi) {
201 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
202 msm_dsi_phy_disable(sdsi->phy);
203 msm_dsi_phy_disable(mdsi->phy);
204 }
205 } else {
206 msm_dsi_phy_disable(msm_dsi->phy);
207 }
208}
209
210struct dsi_connector {
211 struct drm_connector base;
212 int id;
213};
214
215struct dsi_bridge {
216 struct drm_bridge base;
217 int id;
218};
219
220#define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
221#define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
222
223static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
224{
225 struct dsi_connector *dsi_connector = to_dsi_connector(connector);
226 return dsi_connector->id;
227}
228
229static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
230{
231 struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
232 return dsi_bridge->id;
233}
234
235static enum drm_connector_status dsi_mgr_connector_detect(
236 struct drm_connector *connector, bool force)
237{
238 int id = dsi_mgr_connector_get_id(connector);
239 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
240 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
241 struct msm_drm_private *priv = connector->dev->dev_private;
242 struct msm_kms *kms = priv->kms;
243
244 DBG("id=%d", id);
245 if (!msm_dsi->panel) {
246 msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
247 &msm_dsi->device_flags);
248
249 /* There is only 1 panel in the global panel list
250 * for dual DSI mode. Therefore slave dsi should get
251 * the drm_panel instance from master dsi, and
252 * keep using the panel flags got from the current DSI link.
253 */
254 if (!msm_dsi->panel && IS_DUAL_DSI() &&
255 !IS_MASTER_DSI_LINK(id) && other_dsi)
256 msm_dsi->panel = msm_dsi_host_get_panel(
257 other_dsi->host, NULL);
258
259
260 if (msm_dsi->panel && kms->funcs->set_encoder_mode) {
261 bool cmd_mode = !(msm_dsi->device_flags &
262 MIPI_DSI_MODE_VIDEO);
263 struct drm_encoder *encoder =
264 msm_dsi_get_encoder(msm_dsi);
265
266 kms->funcs->set_encoder_mode(kms, encoder, cmd_mode);
267 }
268
269 if (msm_dsi->panel && IS_DUAL_DSI())
270 drm_object_attach_property(&connector->base,
271 connector->dev->mode_config.tile_property, 0);
272
273 /* Set split display info to kms once dual DSI panel is
274 * connected to both hosts.
275 */
276 if (msm_dsi->panel && IS_DUAL_DSI() &&
277 other_dsi && other_dsi->panel) {
278 bool cmd_mode = !(msm_dsi->device_flags &
279 MIPI_DSI_MODE_VIDEO);
280 struct drm_encoder *encoder = msm_dsi_get_encoder(
281 dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
282 struct drm_encoder *slave_enc = msm_dsi_get_encoder(
283 dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
284
285 if (kms->funcs->set_split_display)
286 kms->funcs->set_split_display(kms, encoder,
287 slave_enc, cmd_mode);
288 else
289 pr_err("mdp does not support dual DSI\n");
290 }
291 }
292
293 return msm_dsi->panel ? connector_status_connected :
294 connector_status_disconnected;
295}
296
297static void dsi_mgr_connector_destroy(struct drm_connector *connector)
298{
299 struct dsi_connector *dsi_connector = to_dsi_connector(connector);
300
301 DBG("");
302
303 drm_connector_cleanup(connector);
304
305 kfree(dsi_connector);
306}
307
308static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
309{
310 struct drm_display_mode *mode, *m;
311
312 /* Only support left-right mode */
313 list_for_each_entry_safe(mode, m, &connector->probed_modes, head) {
314 mode->clock >>= 1;
315 mode->hdisplay >>= 1;
316 mode->hsync_start >>= 1;
317 mode->hsync_end >>= 1;
318 mode->htotal >>= 1;
319 drm_mode_set_name(mode);
320 }
321}
322
323static int dsi_dual_connector_tile_init(
324 struct drm_connector *connector, int id)
325{
326 struct drm_display_mode *mode;
327 /* Fake topology id */
328 char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'};
329
330 if (connector->tile_group) {
331 DBG("Tile property has been initialized");
332 return 0;
333 }
334
335 /* Use the first mode only for now */
336 mode = list_first_entry(&connector->probed_modes,
337 struct drm_display_mode,
338 head);
339 if (!mode)
340 return -EINVAL;
341
342 connector->tile_group = drm_mode_get_tile_group(
343 connector->dev, topo_id);
344 if (!connector->tile_group)
345 connector->tile_group = drm_mode_create_tile_group(
346 connector->dev, topo_id);
347 if (!connector->tile_group) {
348 pr_err("%s: failed to create tile group\n", __func__);
349 return -ENOMEM;
350 }
351
352 connector->has_tile = true;
353 connector->tile_is_single_monitor = true;
354
355 /* mode has been fixed */
356 connector->tile_h_size = mode->hdisplay;
357 connector->tile_v_size = mode->vdisplay;
358
359 /* Only support left-right mode */
360 connector->num_h_tile = 2;
361 connector->num_v_tile = 1;
362
363 connector->tile_v_loc = 0;
364 connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0;
365
366 return 0;
367}
368
369static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
370{
371 int id = dsi_mgr_connector_get_id(connector);
372 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
373 struct drm_panel *panel = msm_dsi->panel;
374 int ret, num;
375
376 if (!panel)
377 return 0;
378
379 /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode,
380 * panel should not attach to any connector.
381 * Only temporarily attach panel to the current connector here,
382 * to let panel set mode to this connector.
383 */
384 drm_panel_attach(panel, connector);
385 num = drm_panel_get_modes(panel);
386 drm_panel_detach(panel);
387 if (!num)
388 return 0;
389
390 if (IS_DUAL_DSI()) {
391 /* report half resolution to user */
392 dsi_dual_connector_fix_modes(connector);
393 ret = dsi_dual_connector_tile_init(connector, id);
394 if (ret)
395 return ret;
396 ret = drm_mode_connector_set_tile_property(connector);
397 if (ret) {
398 pr_err("%s: set tile property failed, %d\n",
399 __func__, ret);
400 return ret;
401 }
402 }
403
404 return num;
405}
406
407static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
408 struct drm_display_mode *mode)
409{
410 int id = dsi_mgr_connector_get_id(connector);
411 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
412 struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
413 struct msm_drm_private *priv = connector->dev->dev_private;
414 struct msm_kms *kms = priv->kms;
415 long actual, requested;
416
417 DBG("");
418 requested = 1000 * mode->clock;
419 actual = kms->funcs->round_pixclk(kms, requested, encoder);
420
421 DBG("requested=%ld, actual=%ld", requested, actual);
422 if (actual != requested)
423 return MODE_CLOCK_RANGE;
424
425 return MODE_OK;
426}
427
428static struct drm_encoder *
429dsi_mgr_connector_best_encoder(struct drm_connector *connector)
430{
431 int id = dsi_mgr_connector_get_id(connector);
432 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
433
434 DBG("");
435 return msm_dsi_get_encoder(msm_dsi);
436}
437
438static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
439{
440 int id = dsi_mgr_bridge_get_id(bridge);
441 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
442 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
443 struct mipi_dsi_host *host = msm_dsi->host;
444 struct drm_panel *panel = msm_dsi->panel;
445 struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
446 bool is_dual_dsi = IS_DUAL_DSI();
447 int ret;
448
449 DBG("id=%d", id);
450 if (!msm_dsi_device_connected(msm_dsi))
451 return;
452
453 ret = dsi_mgr_phy_enable(id, phy_shared_timings);
454 if (ret)
455 goto phy_en_fail;
456
457 /* Do nothing with the host if it is DSI 1 in case of dual DSI */
458 if (is_dual_dsi && (DSI_1 == id))
459 return;
460
461 ret = msm_dsi_host_power_on(host, &phy_shared_timings[id]);
462 if (ret) {
463 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
464 goto host_on_fail;
465 }
466
467 if (is_dual_dsi && msm_dsi1) {
468 ret = msm_dsi_host_power_on(msm_dsi1->host,
469 &phy_shared_timings[DSI_1]);
470 if (ret) {
471 pr_err("%s: power on host1 failed, %d\n",
472 __func__, ret);
473 goto host1_on_fail;
474 }
475 }
476
477 /* Always call panel functions once, because even for dual panels,
478 * there is only one drm_panel instance.
479 */
480 if (panel) {
481 ret = drm_panel_prepare(panel);
482 if (ret) {
483 pr_err("%s: prepare panel %d failed, %d\n", __func__,
484 id, ret);
485 goto panel_prep_fail;
486 }
487 }
488
489 ret = msm_dsi_host_enable(host);
490 if (ret) {
491 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
492 goto host_en_fail;
493 }
494
495 if (is_dual_dsi && msm_dsi1) {
496 ret = msm_dsi_host_enable(msm_dsi1->host);
497 if (ret) {
498 pr_err("%s: enable host1 failed, %d\n", __func__, ret);
499 goto host1_en_fail;
500 }
501 }
502
503 if (panel) {
504 ret = drm_panel_enable(panel);
505 if (ret) {
506 pr_err("%s: enable panel %d failed, %d\n", __func__, id,
507 ret);
508 goto panel_en_fail;
509 }
510 }
511
512 return;
513
514panel_en_fail:
515 if (is_dual_dsi && msm_dsi1)
516 msm_dsi_host_disable(msm_dsi1->host);
517host1_en_fail:
518 msm_dsi_host_disable(host);
519host_en_fail:
520 if (panel)
521 drm_panel_unprepare(panel);
522panel_prep_fail:
523 if (is_dual_dsi && msm_dsi1)
524 msm_dsi_host_power_off(msm_dsi1->host);
525host1_on_fail:
526 msm_dsi_host_power_off(host);
527host_on_fail:
528 dsi_mgr_phy_disable(id);
529phy_en_fail:
530 return;
531}
532
533static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
534{
535 DBG("");
536}
537
538static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
539{
540 DBG("");
541}
542
543static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
544{
545 int id = dsi_mgr_bridge_get_id(bridge);
546 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
547 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
548 struct mipi_dsi_host *host = msm_dsi->host;
549 struct drm_panel *panel = msm_dsi->panel;
550 bool is_dual_dsi = IS_DUAL_DSI();
551 int ret;
552
553 DBG("id=%d", id);
554
555 if (!msm_dsi_device_connected(msm_dsi))
556 return;
557
558 /*
559 * Do nothing with the host if it is DSI 1 in case of dual DSI.
560 * It is safe to call dsi_mgr_phy_disable() here because a single PHY
561 * won't be diabled until both PHYs request disable.
562 */
563 if (is_dual_dsi && (DSI_1 == id))
564 goto disable_phy;
565
566 if (panel) {
567 ret = drm_panel_disable(panel);
568 if (ret)
569 pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
570 ret);
571 }
572
573 ret = msm_dsi_host_disable(host);
574 if (ret)
575 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
576
577 if (is_dual_dsi && msm_dsi1) {
578 ret = msm_dsi_host_disable(msm_dsi1->host);
579 if (ret)
580 pr_err("%s: host1 disable failed, %d\n", __func__, ret);
581 }
582
583 if (panel) {
584 ret = drm_panel_unprepare(panel);
585 if (ret)
586 pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
587 id, ret);
588 }
589
590 ret = msm_dsi_host_power_off(host);
591 if (ret)
592 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
593
594 if (is_dual_dsi && msm_dsi1) {
595 ret = msm_dsi_host_power_off(msm_dsi1->host);
596 if (ret)
597 pr_err("%s: host1 power off failed, %d\n",
598 __func__, ret);
599 }
600
601disable_phy:
602 dsi_mgr_phy_disable(id);
603}
604
605static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
606 struct drm_display_mode *mode,
607 struct drm_display_mode *adjusted_mode)
608{
609 int id = dsi_mgr_bridge_get_id(bridge);
610 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
611 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
612 struct mipi_dsi_host *host = msm_dsi->host;
613 bool is_dual_dsi = IS_DUAL_DSI();
614
615 DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
616 mode->base.id, mode->name,
617 mode->vrefresh, mode->clock,
618 mode->hdisplay, mode->hsync_start,
619 mode->hsync_end, mode->htotal,
620 mode->vdisplay, mode->vsync_start,
621 mode->vsync_end, mode->vtotal,
622 mode->type, mode->flags);
623
624 if (is_dual_dsi && (DSI_1 == id))
625 return;
626
627 msm_dsi_host_set_display_mode(host, adjusted_mode);
628 if (is_dual_dsi && other_dsi)
629 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
630}
631
632static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
633 .detect = dsi_mgr_connector_detect,
634 .fill_modes = drm_helper_probe_single_connector_modes,
635 .destroy = dsi_mgr_connector_destroy,
636 .reset = drm_atomic_helper_connector_reset,
637 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
638 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
639};
640
641static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
642 .get_modes = dsi_mgr_connector_get_modes,
643 .mode_valid = dsi_mgr_connector_mode_valid,
644 .best_encoder = dsi_mgr_connector_best_encoder,
645};
646
647static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
648 .pre_enable = dsi_mgr_bridge_pre_enable,
649 .enable = dsi_mgr_bridge_enable,
650 .disable = dsi_mgr_bridge_disable,
651 .post_disable = dsi_mgr_bridge_post_disable,
652 .mode_set = dsi_mgr_bridge_mode_set,
653};
654
655/* initialize connector when we're connected to a drm_panel */
656struct drm_connector *msm_dsi_manager_connector_init(u8 id)
657{
658 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
659 struct drm_connector *connector = NULL;
660 struct dsi_connector *dsi_connector;
661 int ret;
662
663 dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
664 if (!dsi_connector)
665 return ERR_PTR(-ENOMEM);
666
667 dsi_connector->id = id;
668
669 connector = &dsi_connector->base;
670
671 ret = drm_connector_init(msm_dsi->dev, connector,
672 &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
673 if (ret)
674 return ERR_PTR(ret);
675
676 drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
677
678 /* Enable HPD to let hpd event is handled
679 * when panel is attached to the host.
680 */
681 connector->polled = DRM_CONNECTOR_POLL_HPD;
682
683 /* Display driver doesn't support interlace now. */
684 connector->interlace_allowed = 0;
685 connector->doublescan_allowed = 0;
686
687 drm_mode_connector_attach_encoder(connector, msm_dsi->encoder);
688
689 return connector;
690}
691
692/* initialize bridge */
693struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
694{
695 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
696 struct drm_bridge *bridge = NULL;
697 struct dsi_bridge *dsi_bridge;
698 struct drm_encoder *encoder;
699 int ret;
700
701 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
702 sizeof(*dsi_bridge), GFP_KERNEL);
703 if (!dsi_bridge) {
704 ret = -ENOMEM;
705 goto fail;
706 }
707
708 dsi_bridge->id = id;
709
710 encoder = msm_dsi->encoder;
711
712 bridge = &dsi_bridge->base;
713 bridge->funcs = &dsi_mgr_bridge_funcs;
714
715 ret = drm_bridge_attach(encoder, bridge, NULL);
716 if (ret)
717 goto fail;
718
719 return bridge;
720
721fail:
722 if (bridge)
723 msm_dsi_manager_bridge_destroy(bridge);
724
725 return ERR_PTR(ret);
726}
727
728struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
729{
730 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
731 struct drm_device *dev = msm_dsi->dev;
732 struct drm_encoder *encoder;
733 struct drm_bridge *int_bridge, *ext_bridge;
734 struct drm_connector *connector;
735 struct list_head *connector_list;
736
737 int_bridge = msm_dsi->bridge;
738 ext_bridge = msm_dsi->external_bridge =
739 msm_dsi_host_get_bridge(msm_dsi->host);
740
741 encoder = msm_dsi->encoder;
742
743 /* link the internal dsi bridge to the external bridge */
744 drm_bridge_attach(encoder, ext_bridge, int_bridge);
745
746 /*
747 * we need the drm_connector created by the external bridge
748 * driver (or someone else) to feed it to our driver's
749 * priv->connector[] list, mainly for msm_fbdev_init()
750 */
751 connector_list = &dev->mode_config.connector_list;
752
753 list_for_each_entry(connector, connector_list, head) {
754 int i;
755
756 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
757 if (connector->encoder_ids[i] == encoder->base.id)
758 return connector;
759 }
760 }
761
762 return ERR_PTR(-ENODEV);
763}
764
765void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
766{
767}
768
769int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
770{
771 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
772 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
773 struct mipi_dsi_host *host = msm_dsi->host;
774 bool is_read = (msg->rx_buf && msg->rx_len);
775 bool need_sync = (IS_SYNC_NEEDED() && !is_read);
776 int ret;
777
778 if (!msg->tx_buf || !msg->tx_len)
779 return 0;
780
781 /* In dual master case, panel requires the same commands sent to
782 * both DSI links. Host issues the command trigger to both links
783 * when DSI_1 calls the cmd transfer function, no matter it happens
784 * before or after DSI_0 cmd transfer.
785 */
786 if (need_sync && (id == DSI_0))
787 return is_read ? msg->rx_len : msg->tx_len;
788
789 if (need_sync && msm_dsi0) {
790 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
791 if (ret) {
792 pr_err("%s: failed to prepare non-trigger host, %d\n",
793 __func__, ret);
794 return ret;
795 }
796 }
797 ret = msm_dsi_host_xfer_prepare(host, msg);
798 if (ret) {
799 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
800 goto restore_host0;
801 }
802
803 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
804 msm_dsi_host_cmd_tx(host, msg);
805
806 msm_dsi_host_xfer_restore(host, msg);
807
808restore_host0:
809 if (need_sync && msm_dsi0)
810 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
811
812 return ret;
813}
814
815bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
816{
817 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
818 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
819 struct mipi_dsi_host *host = msm_dsi->host;
820
821 if (IS_SYNC_NEEDED() && (id == DSI_0))
822 return false;
823
824 if (IS_SYNC_NEEDED() && msm_dsi0)
825 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
826
827 msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
828
829 return true;
830}
831
832void msm_dsi_manager_attach_dsi_device(int id, u32 device_flags)
833{
834 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
835 struct drm_device *dev = msm_dsi->dev;
836 struct msm_drm_private *priv;
837 struct msm_kms *kms;
838 struct drm_encoder *encoder;
839
840 /*
841 * drm_device pointer is assigned to msm_dsi only in the modeset_init
842 * path. If mipi_dsi_attach() happens in DSI driver's probe path
843 * (generally the case when we're connected to a drm_panel of the type
844 * mipi_dsi_device), this would be NULL. In such cases, try to set the
845 * encoder mode in the DSI connector's detect() op.
846 */
847 if (!dev)
848 return;
849
850 priv = dev->dev_private;
851 kms = priv->kms;
852 encoder = msm_dsi_get_encoder(msm_dsi);
853
854 if (encoder && kms->funcs->set_encoder_mode)
855 if (!(device_flags & MIPI_DSI_MODE_VIDEO))
856 kms->funcs->set_encoder_mode(kms, encoder, true);
857}
858
859int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
860{
861 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
862 int id = msm_dsi->id;
863 int ret;
864
865 if (id >= DSI_MAX) {
866 pr_err("%s: invalid id %d\n", __func__, id);
867 return -EINVAL;
868 }
869
870 if (msm_dsim->dsi[id]) {
871 pr_err("%s: dsi%d already registered\n", __func__, id);
872 return -EBUSY;
873 }
874
875 msm_dsim->dsi[id] = msm_dsi;
876
877 ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
878 if (ret) {
879 pr_err("%s: failed to parse dual DSI info\n", __func__);
880 goto fail;
881 }
882
883 ret = dsi_mgr_setup_components(id);
884 if (ret) {
885 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
886 __func__, id);
887 goto fail;
888 }
889
890 return 0;
891
892fail:
893 msm_dsim->dsi[id] = NULL;
894 return ret;
895}
896
897void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
898{
899 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
900
901 if (msm_dsi->host)
902 msm_dsi_host_unregister(msm_dsi->host);
903 msm_dsim->dsi[msm_dsi->id] = NULL;
904}
905