dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / gpu / drm / msm / dsi / dsi_manager.c
blob979a8e9293412349f1d29d894fb4e2f64d1d5cc2
1 /*
2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
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.
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.
14 #include "msm_kms.h"
15 #include "dsi.h"
17 #define DSI_CLOCK_MASTER DSI_0
18 #define DSI_CLOCK_SLAVE DSI_1
20 #define DSI_LEFT DSI_0
21 #define DSI_RIGHT DSI_1
23 /* According to the current drm framework sequence, take the encoder of
24 * DSI_1 as master encoder
26 #define DSI_ENCODER_MASTER DSI_1
27 #define DSI_ENCODER_SLAVE DSI_0
29 struct msm_dsi_manager {
30 struct msm_dsi *dsi[DSI_MAX];
32 bool is_dual_dsi;
33 bool is_sync_needed;
34 int master_dsi_link_id;
37 static struct msm_dsi_manager msm_dsim_glb;
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)
43 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
45 return msm_dsim_glb.dsi[id];
48 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
50 return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
53 static int dsi_mgr_parse_dual_dsi(struct device_node *np, int id)
55 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
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.
60 if (!msm_dsim->is_dual_dsi)
61 msm_dsim->is_dual_dsi = of_property_read_bool(
62 np, "qcom,dual-dsi-mode");
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");
72 return 0;
75 static int dsi_mgr_setup_components(int id)
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;
84 if (!IS_DUAL_DSI()) {
85 ret = msm_dsi_host_register(msm_dsi->host, true);
86 if (ret)
87 return ret;
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.
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;
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);
129 return ret;
132 static int enable_phy(struct msm_dsi *msm_dsi, int src_pll_id,
133 struct msm_dsi_phy_shared_timings *shared_timings)
135 struct msm_dsi_phy_clk_request clk_req;
136 int ret;
137 bool is_dual_dsi = IS_DUAL_DSI();
139 msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_dual_dsi);
141 ret = msm_dsi_phy_enable(msm_dsi->phy, src_pll_id, &clk_req);
142 msm_dsi_phy_get_shared_timings(msm_dsi->phy, shared_timings);
144 return ret;
147 static int
148 dsi_mgr_phy_enable(int id,
149 struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
151 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
152 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
153 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
154 int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id;
155 int ret;
157 /* In case of dual DSI, some registers in PHY1 have been programmed
158 * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
159 * will silently reset those PHY1 registers. Therefore we need to reset
160 * and enable both PHYs before any PLL clock operation.
162 if (IS_DUAL_DSI() && mdsi && sdsi) {
163 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
164 msm_dsi_host_reset_phy(mdsi->host);
165 msm_dsi_host_reset_phy(sdsi->host);
167 ret = enable_phy(mdsi, src_pll_id,
168 &shared_timings[DSI_CLOCK_MASTER]);
169 if (ret)
170 return ret;
171 ret = enable_phy(sdsi, src_pll_id,
172 &shared_timings[DSI_CLOCK_SLAVE]);
173 if (ret) {
174 msm_dsi_phy_disable(mdsi->phy);
175 return ret;
178 } else {
179 msm_dsi_host_reset_phy(msm_dsi->host);
180 ret = enable_phy(msm_dsi, src_pll_id, &shared_timings[id]);
181 if (ret)
182 return ret;
185 msm_dsi->phy_enabled = true;
187 return 0;
190 static void dsi_mgr_phy_disable(int id)
192 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
193 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
194 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
196 /* disable DSI phy
197 * In dual-dsi configuration, the phy should be disabled for the
198 * first controller only when the second controller is disabled.
200 msm_dsi->phy_enabled = false;
201 if (IS_DUAL_DSI() && mdsi && sdsi) {
202 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
203 msm_dsi_phy_disable(sdsi->phy);
204 msm_dsi_phy_disable(mdsi->phy);
206 } else {
207 msm_dsi_phy_disable(msm_dsi->phy);
211 struct dsi_connector {
212 struct drm_connector base;
213 int id;
216 struct dsi_bridge {
217 struct drm_bridge base;
218 int id;
221 #define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
222 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
224 static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
226 struct dsi_connector *dsi_connector = to_dsi_connector(connector);
227 return dsi_connector->id;
230 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
232 struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
233 return dsi_bridge->id;
236 static enum drm_connector_status dsi_mgr_connector_detect(
237 struct drm_connector *connector, bool force)
239 int id = dsi_mgr_connector_get_id(connector);
240 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
241 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
242 struct msm_drm_private *priv = connector->dev->dev_private;
243 struct msm_kms *kms = priv->kms;
245 DBG("id=%d", id);
246 if (!msm_dsi->panel) {
247 msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
248 &msm_dsi->device_flags);
250 /* There is only 1 panel in the global panel list
251 * for dual DSI mode. Therefore slave dsi should get
252 * the drm_panel instance from master dsi, and
253 * keep using the panel flags got from the current DSI link.
255 if (!msm_dsi->panel && IS_DUAL_DSI() &&
256 !IS_MASTER_DSI_LINK(id) && other_dsi)
257 msm_dsi->panel = msm_dsi_host_get_panel(
258 other_dsi->host, NULL);
261 if (msm_dsi->panel && kms->funcs->set_encoder_mode) {
262 bool cmd_mode = !(msm_dsi->device_flags &
263 MIPI_DSI_MODE_VIDEO);
264 struct drm_encoder *encoder =
265 msm_dsi_get_encoder(msm_dsi);
267 kms->funcs->set_encoder_mode(kms, encoder, cmd_mode);
270 if (msm_dsi->panel && IS_DUAL_DSI())
271 drm_object_attach_property(&connector->base,
272 connector->dev->mode_config.tile_property, 0);
274 /* Set split display info to kms once dual DSI panel is
275 * connected to both hosts.
277 if (msm_dsi->panel && IS_DUAL_DSI() &&
278 other_dsi && other_dsi->panel) {
279 bool cmd_mode = !(msm_dsi->device_flags &
280 MIPI_DSI_MODE_VIDEO);
281 struct drm_encoder *encoder = msm_dsi_get_encoder(
282 dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
283 struct drm_encoder *slave_enc = msm_dsi_get_encoder(
284 dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
286 if (kms->funcs->set_split_display)
287 kms->funcs->set_split_display(kms, encoder,
288 slave_enc, cmd_mode);
289 else
290 pr_err("mdp does not support dual DSI\n");
294 return msm_dsi->panel ? connector_status_connected :
295 connector_status_disconnected;
298 static void dsi_mgr_connector_destroy(struct drm_connector *connector)
300 struct dsi_connector *dsi_connector = to_dsi_connector(connector);
302 DBG("");
304 drm_connector_cleanup(connector);
306 kfree(dsi_connector);
309 static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
311 int id = dsi_mgr_connector_get_id(connector);
312 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
313 struct drm_panel *panel = msm_dsi->panel;
314 int num;
316 if (!panel)
317 return 0;
320 * In dual DSI mode, we have one connector that can be
321 * attached to the drm_panel.
323 drm_panel_attach(panel, connector);
324 num = drm_panel_get_modes(panel);
325 if (!num)
326 return 0;
328 return num;
331 static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
332 struct drm_display_mode *mode)
334 int id = dsi_mgr_connector_get_id(connector);
335 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
336 struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
337 struct msm_drm_private *priv = connector->dev->dev_private;
338 struct msm_kms *kms = priv->kms;
339 long actual, requested;
341 DBG("");
342 requested = 1000 * mode->clock;
343 actual = kms->funcs->round_pixclk(kms, requested, encoder);
345 DBG("requested=%ld, actual=%ld", requested, actual);
346 if (actual != requested)
347 return MODE_CLOCK_RANGE;
349 return MODE_OK;
352 static struct drm_encoder *
353 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
355 int id = dsi_mgr_connector_get_id(connector);
356 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
358 DBG("");
359 return msm_dsi_get_encoder(msm_dsi);
362 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
364 int id = dsi_mgr_bridge_get_id(bridge);
365 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
366 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
367 struct mipi_dsi_host *host = msm_dsi->host;
368 struct drm_panel *panel = msm_dsi->panel;
369 struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
370 bool is_dual_dsi = IS_DUAL_DSI();
371 int ret;
373 DBG("id=%d", id);
374 if (!msm_dsi_device_connected(msm_dsi))
375 return;
377 ret = dsi_mgr_phy_enable(id, phy_shared_timings);
378 if (ret)
379 goto phy_en_fail;
381 /* Do nothing with the host if it is slave-DSI in case of dual DSI */
382 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
383 return;
385 ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_dual_dsi);
386 if (ret) {
387 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
388 goto host_on_fail;
391 if (is_dual_dsi && msm_dsi1) {
392 ret = msm_dsi_host_power_on(msm_dsi1->host,
393 &phy_shared_timings[DSI_1], is_dual_dsi);
394 if (ret) {
395 pr_err("%s: power on host1 failed, %d\n",
396 __func__, ret);
397 goto host1_on_fail;
401 /* Always call panel functions once, because even for dual panels,
402 * there is only one drm_panel instance.
404 if (panel) {
405 ret = drm_panel_prepare(panel);
406 if (ret) {
407 pr_err("%s: prepare panel %d failed, %d\n", __func__,
408 id, ret);
409 goto panel_prep_fail;
413 ret = msm_dsi_host_enable(host);
414 if (ret) {
415 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
416 goto host_en_fail;
419 if (is_dual_dsi && msm_dsi1) {
420 ret = msm_dsi_host_enable(msm_dsi1->host);
421 if (ret) {
422 pr_err("%s: enable host1 failed, %d\n", __func__, ret);
423 goto host1_en_fail;
427 if (panel) {
428 ret = drm_panel_enable(panel);
429 if (ret) {
430 pr_err("%s: enable panel %d failed, %d\n", __func__, id,
431 ret);
432 goto panel_en_fail;
436 return;
438 panel_en_fail:
439 if (is_dual_dsi && msm_dsi1)
440 msm_dsi_host_disable(msm_dsi1->host);
441 host1_en_fail:
442 msm_dsi_host_disable(host);
443 host_en_fail:
444 if (panel)
445 drm_panel_unprepare(panel);
446 panel_prep_fail:
447 if (is_dual_dsi && msm_dsi1)
448 msm_dsi_host_power_off(msm_dsi1->host);
449 host1_on_fail:
450 msm_dsi_host_power_off(host);
451 host_on_fail:
452 dsi_mgr_phy_disable(id);
453 phy_en_fail:
454 return;
457 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
459 DBG("");
462 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
464 DBG("");
467 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
469 int id = dsi_mgr_bridge_get_id(bridge);
470 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
471 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
472 struct mipi_dsi_host *host = msm_dsi->host;
473 struct drm_panel *panel = msm_dsi->panel;
474 bool is_dual_dsi = IS_DUAL_DSI();
475 int ret;
477 DBG("id=%d", id);
479 if (!msm_dsi_device_connected(msm_dsi))
480 return;
483 * Do nothing with the host if it is slave-DSI in case of dual DSI.
484 * It is safe to call dsi_mgr_phy_disable() here because a single PHY
485 * won't be diabled until both PHYs request disable.
487 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
488 goto disable_phy;
490 if (panel) {
491 ret = drm_panel_disable(panel);
492 if (ret)
493 pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
494 ret);
497 ret = msm_dsi_host_disable(host);
498 if (ret)
499 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
501 if (is_dual_dsi && msm_dsi1) {
502 ret = msm_dsi_host_disable(msm_dsi1->host);
503 if (ret)
504 pr_err("%s: host1 disable failed, %d\n", __func__, ret);
507 if (panel) {
508 ret = drm_panel_unprepare(panel);
509 if (ret)
510 pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
511 id, ret);
514 ret = msm_dsi_host_power_off(host);
515 if (ret)
516 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
518 if (is_dual_dsi && msm_dsi1) {
519 ret = msm_dsi_host_power_off(msm_dsi1->host);
520 if (ret)
521 pr_err("%s: host1 power off failed, %d\n",
522 __func__, ret);
525 disable_phy:
526 dsi_mgr_phy_disable(id);
529 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
530 const struct drm_display_mode *mode,
531 const struct drm_display_mode *adjusted_mode)
533 int id = dsi_mgr_bridge_get_id(bridge);
534 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
535 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
536 struct mipi_dsi_host *host = msm_dsi->host;
537 bool is_dual_dsi = IS_DUAL_DSI();
539 DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
541 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
542 return;
544 msm_dsi_host_set_display_mode(host, adjusted_mode);
545 if (is_dual_dsi && other_dsi)
546 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
549 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
550 .detect = dsi_mgr_connector_detect,
551 .fill_modes = drm_helper_probe_single_connector_modes,
552 .destroy = dsi_mgr_connector_destroy,
553 .reset = drm_atomic_helper_connector_reset,
554 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
555 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
558 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
559 .get_modes = dsi_mgr_connector_get_modes,
560 .mode_valid = dsi_mgr_connector_mode_valid,
561 .best_encoder = dsi_mgr_connector_best_encoder,
564 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
565 .pre_enable = dsi_mgr_bridge_pre_enable,
566 .enable = dsi_mgr_bridge_enable,
567 .disable = dsi_mgr_bridge_disable,
568 .post_disable = dsi_mgr_bridge_post_disable,
569 .mode_set = dsi_mgr_bridge_mode_set,
572 /* initialize connector when we're connected to a drm_panel */
573 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
575 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
576 struct drm_connector *connector = NULL;
577 struct dsi_connector *dsi_connector;
578 int ret;
580 dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
581 if (!dsi_connector)
582 return ERR_PTR(-ENOMEM);
584 dsi_connector->id = id;
586 connector = &dsi_connector->base;
588 ret = drm_connector_init(msm_dsi->dev, connector,
589 &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
590 if (ret)
591 return ERR_PTR(ret);
593 drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
595 /* Enable HPD to let hpd event is handled
596 * when panel is attached to the host.
598 connector->polled = DRM_CONNECTOR_POLL_HPD;
600 /* Display driver doesn't support interlace now. */
601 connector->interlace_allowed = 0;
602 connector->doublescan_allowed = 0;
604 drm_connector_attach_encoder(connector, msm_dsi->encoder);
606 return connector;
609 bool msm_dsi_manager_validate_current_config(u8 id)
611 bool is_dual_dsi = IS_DUAL_DSI();
614 * For dual DSI, we only have one drm panel. For this
615 * use case, we register only one bridge/connector.
616 * Skip bridge/connector initialisation if it is
617 * slave-DSI for dual DSI configuration.
619 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) {
620 DBG("Skip bridge registration for slave DSI->id: %d\n", id);
621 return false;
623 return true;
626 /* initialize bridge */
627 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
629 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
630 struct drm_bridge *bridge = NULL;
631 struct dsi_bridge *dsi_bridge;
632 struct drm_encoder *encoder;
633 int ret;
635 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
636 sizeof(*dsi_bridge), GFP_KERNEL);
637 if (!dsi_bridge) {
638 ret = -ENOMEM;
639 goto fail;
642 dsi_bridge->id = id;
644 encoder = msm_dsi->encoder;
646 bridge = &dsi_bridge->base;
647 bridge->funcs = &dsi_mgr_bridge_funcs;
649 ret = drm_bridge_attach(encoder, bridge, NULL);
650 if (ret)
651 goto fail;
653 return bridge;
655 fail:
656 if (bridge)
657 msm_dsi_manager_bridge_destroy(bridge);
659 return ERR_PTR(ret);
662 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
664 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
665 struct drm_device *dev = msm_dsi->dev;
666 struct drm_encoder *encoder;
667 struct drm_bridge *int_bridge, *ext_bridge;
668 struct drm_connector *connector;
669 struct list_head *connector_list;
671 int_bridge = msm_dsi->bridge;
672 ext_bridge = msm_dsi->external_bridge =
673 msm_dsi_host_get_bridge(msm_dsi->host);
675 encoder = msm_dsi->encoder;
677 /* link the internal dsi bridge to the external bridge */
678 drm_bridge_attach(encoder, ext_bridge, int_bridge);
681 * we need the drm_connector created by the external bridge
682 * driver (or someone else) to feed it to our driver's
683 * priv->connector[] list, mainly for msm_fbdev_init()
685 connector_list = &dev->mode_config.connector_list;
687 list_for_each_entry(connector, connector_list, head) {
688 if (drm_connector_has_possible_encoder(connector, encoder))
689 return connector;
692 return ERR_PTR(-ENODEV);
695 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
699 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
701 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
702 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
703 struct mipi_dsi_host *host = msm_dsi->host;
704 bool is_read = (msg->rx_buf && msg->rx_len);
705 bool need_sync = (IS_SYNC_NEEDED() && !is_read);
706 int ret;
708 if (!msg->tx_buf || !msg->tx_len)
709 return 0;
711 /* In dual master case, panel requires the same commands sent to
712 * both DSI links. Host issues the command trigger to both links
713 * when DSI_1 calls the cmd transfer function, no matter it happens
714 * before or after DSI_0 cmd transfer.
716 if (need_sync && (id == DSI_0))
717 return is_read ? msg->rx_len : msg->tx_len;
719 if (need_sync && msm_dsi0) {
720 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
721 if (ret) {
722 pr_err("%s: failed to prepare non-trigger host, %d\n",
723 __func__, ret);
724 return ret;
727 ret = msm_dsi_host_xfer_prepare(host, msg);
728 if (ret) {
729 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
730 goto restore_host0;
733 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
734 msm_dsi_host_cmd_tx(host, msg);
736 msm_dsi_host_xfer_restore(host, msg);
738 restore_host0:
739 if (need_sync && msm_dsi0)
740 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
742 return ret;
745 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
747 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
748 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
749 struct mipi_dsi_host *host = msm_dsi->host;
751 if (IS_SYNC_NEEDED() && (id == DSI_0))
752 return false;
754 if (IS_SYNC_NEEDED() && msm_dsi0)
755 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
757 msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
759 return true;
762 void msm_dsi_manager_attach_dsi_device(int id, u32 device_flags)
764 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
765 struct drm_device *dev = msm_dsi->dev;
766 struct msm_drm_private *priv;
767 struct msm_kms *kms;
768 struct drm_encoder *encoder;
769 bool cmd_mode;
772 * drm_device pointer is assigned to msm_dsi only in the modeset_init
773 * path. If mipi_dsi_attach() happens in DSI driver's probe path
774 * (generally the case when we're connected to a drm_panel of the type
775 * mipi_dsi_device), this would be NULL. In such cases, try to set the
776 * encoder mode in the DSI connector's detect() op.
778 if (!dev)
779 return;
781 priv = dev->dev_private;
782 kms = priv->kms;
783 encoder = msm_dsi_get_encoder(msm_dsi);
784 cmd_mode = !(device_flags &
785 MIPI_DSI_MODE_VIDEO);
787 if (encoder && kms->funcs->set_encoder_mode)
788 kms->funcs->set_encoder_mode(kms, encoder, cmd_mode);
791 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
793 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
794 int id = msm_dsi->id;
795 int ret;
797 if (id >= DSI_MAX) {
798 pr_err("%s: invalid id %d\n", __func__, id);
799 return -EINVAL;
802 if (msm_dsim->dsi[id]) {
803 pr_err("%s: dsi%d already registered\n", __func__, id);
804 return -EBUSY;
807 msm_dsim->dsi[id] = msm_dsi;
809 ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
810 if (ret) {
811 pr_err("%s: failed to parse dual DSI info\n", __func__);
812 goto fail;
815 ret = dsi_mgr_setup_components(id);
816 if (ret) {
817 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
818 __func__, id);
819 goto fail;
822 return 0;
824 fail:
825 msm_dsim->dsi[id] = NULL;
826 return ret;
829 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
831 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
833 if (msm_dsi->host)
834 msm_dsi_host_unregister(msm_dsi->host);
836 if (msm_dsi->id >= 0)
837 msm_dsim->dsi[msm_dsi->id] = NULL;