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