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