xref: /openbmc/linux/drivers/gpu/drm/msm/dsi/dsi_manager.c (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)
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  
23  struct 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  
31  static 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  
dsi_mgr_get_dsi(int id)37  static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
38  {
39  	return msm_dsim_glb.dsi[id];
40  }
41  
dsi_mgr_get_other_dsi(int id)42  static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
43  {
44  	return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
45  }
46  
dsi_mgr_parse_of(struct device_node * np,int id)47  static int dsi_mgr_parse_of(struct device_node *np, int id)
48  {
49  	struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
50  
51  	/* We assume 2 dsi nodes have the same information of bonded dsi and
52  	 * sync-mode, and only one node specifies master in case of bonded mode.
53  	 */
54  	if (!msm_dsim->is_bonded_dsi)
55  		msm_dsim->is_bonded_dsi = of_property_read_bool(np, "qcom,dual-dsi-mode");
56  
57  	if (msm_dsim->is_bonded_dsi) {
58  		if (of_property_read_bool(np, "qcom,master-dsi"))
59  			msm_dsim->master_dsi_link_id = id;
60  		if (!msm_dsim->is_sync_needed)
61  			msm_dsim->is_sync_needed = of_property_read_bool(
62  					np, "qcom,sync-dual-dsi");
63  	}
64  
65  	return 0;
66  }
67  
dsi_mgr_setup_components(int id)68  static int dsi_mgr_setup_components(int id)
69  {
70  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
71  	struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
72  	struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
73  	struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
74  	int ret;
75  
76  	if (!IS_BONDED_DSI()) {
77  		ret = msm_dsi_host_register(msm_dsi->host);
78  		if (ret)
79  			return ret;
80  
81  		msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
82  		msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
83  	} else if (other_dsi) {
84  		struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
85  							msm_dsi : other_dsi;
86  		struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
87  							other_dsi : msm_dsi;
88  		/* Register slave host first, so that slave DSI device
89  		 * has a chance to probe, and do not block the master
90  		 * DSI device's probe.
91  		 * Also, do not check defer for the slave host,
92  		 * because only master DSI device adds the panel to global
93  		 * panel list. The panel's device is the master DSI device.
94  		 */
95  		ret = msm_dsi_host_register(slave_link_dsi->host);
96  		if (ret)
97  			return ret;
98  		ret = msm_dsi_host_register(master_link_dsi->host);
99  		if (ret)
100  			return ret;
101  
102  		/* PLL0 is to drive both 2 DSI link clocks in bonded DSI mode. */
103  		msm_dsi_phy_set_usecase(clk_master_dsi->phy,
104  					MSM_DSI_PHY_MASTER);
105  		msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
106  					MSM_DSI_PHY_SLAVE);
107  		msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
108  		msm_dsi_host_set_phy_mode(other_dsi->host, other_dsi->phy);
109  	}
110  
111  	return 0;
112  }
113  
enable_phy(struct msm_dsi * msm_dsi,struct msm_dsi_phy_shared_timings * shared_timings)114  static int enable_phy(struct msm_dsi *msm_dsi,
115  		      struct msm_dsi_phy_shared_timings *shared_timings)
116  {
117  	struct msm_dsi_phy_clk_request clk_req;
118  	bool is_bonded_dsi = IS_BONDED_DSI();
119  
120  	msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_bonded_dsi);
121  
122  	return msm_dsi_phy_enable(msm_dsi->phy, &clk_req, shared_timings);
123  }
124  
125  static int
dsi_mgr_phy_enable(int id,struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])126  dsi_mgr_phy_enable(int id,
127  		   struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
128  {
129  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
130  	struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
131  	struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
132  	int ret;
133  
134  	/* In case of bonded DSI, some registers in PHY1 have been programmed
135  	 * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
136  	 * will silently reset those PHY1 registers. Therefore we need to reset
137  	 * and enable both PHYs before any PLL clock operation.
138  	 */
139  	if (IS_BONDED_DSI() && mdsi && sdsi) {
140  		if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
141  			msm_dsi_host_reset_phy(mdsi->host);
142  			msm_dsi_host_reset_phy(sdsi->host);
143  
144  			ret = enable_phy(mdsi,
145  					 &shared_timings[DSI_CLOCK_MASTER]);
146  			if (ret)
147  				return ret;
148  			ret = enable_phy(sdsi,
149  					 &shared_timings[DSI_CLOCK_SLAVE]);
150  			if (ret) {
151  				msm_dsi_phy_disable(mdsi->phy);
152  				return ret;
153  			}
154  		}
155  	} else {
156  		msm_dsi_host_reset_phy(msm_dsi->host);
157  		ret = enable_phy(msm_dsi, &shared_timings[id]);
158  		if (ret)
159  			return ret;
160  	}
161  
162  	msm_dsi->phy_enabled = true;
163  
164  	return 0;
165  }
166  
dsi_mgr_phy_disable(int id)167  static void dsi_mgr_phy_disable(int id)
168  {
169  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
170  	struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
171  	struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
172  
173  	/* disable DSI phy
174  	 * In bonded dsi configuration, the phy should be disabled for the
175  	 * first controller only when the second controller is disabled.
176  	 */
177  	msm_dsi->phy_enabled = false;
178  	if (IS_BONDED_DSI() && mdsi && sdsi) {
179  		if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
180  			msm_dsi_phy_disable(sdsi->phy);
181  			msm_dsi_phy_disable(mdsi->phy);
182  		}
183  	} else {
184  		msm_dsi_phy_disable(msm_dsi->phy);
185  	}
186  }
187  
188  struct dsi_bridge {
189  	struct drm_bridge base;
190  	int id;
191  };
192  
193  #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
194  
dsi_mgr_bridge_get_id(struct drm_bridge * bridge)195  static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
196  {
197  	struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
198  	return dsi_bridge->id;
199  }
200  
msm_dsi_manager_set_split_display(u8 id)201  static void msm_dsi_manager_set_split_display(u8 id)
202  {
203  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
204  	struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
205  	struct msm_drm_private *priv = msm_dsi->dev->dev_private;
206  	struct msm_kms *kms = priv->kms;
207  	struct msm_dsi *master_dsi, *slave_dsi;
208  
209  	if (IS_BONDED_DSI() && !IS_MASTER_DSI_LINK(id)) {
210  		master_dsi = other_dsi;
211  		slave_dsi = msm_dsi;
212  	} else {
213  		master_dsi = msm_dsi;
214  		slave_dsi = other_dsi;
215  	}
216  
217  	if (!msm_dsi->external_bridge || !IS_BONDED_DSI())
218  		return;
219  
220  	/*
221  	 * Set split display info to kms once bonded DSI panel is connected to
222  	 * both hosts.
223  	 */
224  	if (other_dsi && other_dsi->external_bridge && kms->funcs->set_split_display) {
225  		kms->funcs->set_split_display(kms, master_dsi->encoder,
226  					      slave_dsi->encoder,
227  					      msm_dsi_is_cmd_mode(msm_dsi));
228  	}
229  }
230  
dsi_mgr_bridge_power_on(struct drm_bridge * bridge)231  static int dsi_mgr_bridge_power_on(struct drm_bridge *bridge)
232  {
233  	int id = dsi_mgr_bridge_get_id(bridge);
234  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
235  	struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
236  	struct mipi_dsi_host *host = msm_dsi->host;
237  	struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
238  	bool is_bonded_dsi = IS_BONDED_DSI();
239  	int ret;
240  
241  	DBG("id=%d", id);
242  
243  	ret = dsi_mgr_phy_enable(id, phy_shared_timings);
244  	if (ret)
245  		goto phy_en_fail;
246  
247  	ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_bonded_dsi, msm_dsi->phy);
248  	if (ret) {
249  		pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
250  		goto host_on_fail;
251  	}
252  
253  	if (is_bonded_dsi && msm_dsi1) {
254  		ret = msm_dsi_host_power_on(msm_dsi1->host,
255  				&phy_shared_timings[DSI_1], is_bonded_dsi, msm_dsi1->phy);
256  		if (ret) {
257  			pr_err("%s: power on host1 failed, %d\n",
258  							__func__, ret);
259  			goto host1_on_fail;
260  		}
261  	}
262  
263  	/*
264  	 * Enable before preparing the panel, disable after unpreparing, so
265  	 * that the panel can communicate over the DSI link.
266  	 */
267  	msm_dsi_host_enable_irq(host);
268  	if (is_bonded_dsi && msm_dsi1)
269  		msm_dsi_host_enable_irq(msm_dsi1->host);
270  
271  	return 0;
272  
273  host1_on_fail:
274  	msm_dsi_host_power_off(host);
275  host_on_fail:
276  	dsi_mgr_phy_disable(id);
277  phy_en_fail:
278  	return ret;
279  }
280  
dsi_mgr_bridge_power_off(struct drm_bridge * bridge)281  static void dsi_mgr_bridge_power_off(struct drm_bridge *bridge)
282  {
283  	int id = dsi_mgr_bridge_get_id(bridge);
284  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
285  	struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
286  	struct mipi_dsi_host *host = msm_dsi->host;
287  	bool is_bonded_dsi = IS_BONDED_DSI();
288  
289  	msm_dsi_host_disable_irq(host);
290  	if (is_bonded_dsi && msm_dsi1) {
291  		msm_dsi_host_disable_irq(msm_dsi1->host);
292  		msm_dsi_host_power_off(msm_dsi1->host);
293  	}
294  	msm_dsi_host_power_off(host);
295  	dsi_mgr_phy_disable(id);
296  }
297  
dsi_mgr_bridge_pre_enable(struct drm_bridge * bridge)298  static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
299  {
300  	int id = dsi_mgr_bridge_get_id(bridge);
301  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
302  	struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
303  	struct mipi_dsi_host *host = msm_dsi->host;
304  	bool is_bonded_dsi = IS_BONDED_DSI();
305  	int ret;
306  
307  	DBG("id=%d", id);
308  	if (!msm_dsi_device_connected(msm_dsi))
309  		return;
310  
311  	/* Do nothing with the host if it is slave-DSI in case of bonded DSI */
312  	if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
313  		return;
314  
315  	ret = dsi_mgr_bridge_power_on(bridge);
316  	if (ret) {
317  		dev_err(&msm_dsi->pdev->dev, "Power on failed: %d\n", ret);
318  		return;
319  	}
320  
321  	ret = msm_dsi_host_enable(host);
322  	if (ret) {
323  		pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
324  		goto host_en_fail;
325  	}
326  
327  	if (is_bonded_dsi && msm_dsi1) {
328  		ret = msm_dsi_host_enable(msm_dsi1->host);
329  		if (ret) {
330  			pr_err("%s: enable host1 failed, %d\n", __func__, ret);
331  			goto host1_en_fail;
332  		}
333  	}
334  
335  	return;
336  
337  host1_en_fail:
338  	msm_dsi_host_disable(host);
339  host_en_fail:
340  	dsi_mgr_bridge_power_off(bridge);
341  }
342  
msm_dsi_manager_tpg_enable(void)343  void msm_dsi_manager_tpg_enable(void)
344  {
345  	struct msm_dsi *m_dsi = dsi_mgr_get_dsi(DSI_0);
346  	struct msm_dsi *s_dsi = dsi_mgr_get_dsi(DSI_1);
347  
348  	/* if dual dsi, trigger tpg on master first then slave */
349  	if (m_dsi) {
350  		msm_dsi_host_test_pattern_en(m_dsi->host);
351  		if (IS_BONDED_DSI() && s_dsi)
352  			msm_dsi_host_test_pattern_en(s_dsi->host);
353  	}
354  }
355  
dsi_mgr_bridge_post_disable(struct drm_bridge * bridge)356  static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
357  {
358  	int id = dsi_mgr_bridge_get_id(bridge);
359  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
360  	struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
361  	struct mipi_dsi_host *host = msm_dsi->host;
362  	bool is_bonded_dsi = IS_BONDED_DSI();
363  	int ret;
364  
365  	DBG("id=%d", id);
366  
367  	if (!msm_dsi_device_connected(msm_dsi))
368  		return;
369  
370  	/*
371  	 * Do nothing with the host if it is slave-DSI in case of bonded DSI.
372  	 * It is safe to call dsi_mgr_phy_disable() here because a single PHY
373  	 * won't be diabled until both PHYs request disable.
374  	 */
375  	if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
376  		goto disable_phy;
377  
378  	ret = msm_dsi_host_disable(host);
379  	if (ret)
380  		pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
381  
382  	if (is_bonded_dsi && msm_dsi1) {
383  		ret = msm_dsi_host_disable(msm_dsi1->host);
384  		if (ret)
385  			pr_err("%s: host1 disable failed, %d\n", __func__, ret);
386  	}
387  
388  	msm_dsi_host_disable_irq(host);
389  	if (is_bonded_dsi && msm_dsi1)
390  		msm_dsi_host_disable_irq(msm_dsi1->host);
391  
392  	/* Save PHY status if it is a clock source */
393  	msm_dsi_phy_pll_save_state(msm_dsi->phy);
394  
395  	ret = msm_dsi_host_power_off(host);
396  	if (ret)
397  		pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
398  
399  	if (is_bonded_dsi && msm_dsi1) {
400  		ret = msm_dsi_host_power_off(msm_dsi1->host);
401  		if (ret)
402  			pr_err("%s: host1 power off failed, %d\n",
403  								__func__, ret);
404  	}
405  
406  disable_phy:
407  	dsi_mgr_phy_disable(id);
408  }
409  
dsi_mgr_bridge_mode_set(struct drm_bridge * bridge,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)410  static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
411  		const struct drm_display_mode *mode,
412  		const struct drm_display_mode *adjusted_mode)
413  {
414  	int id = dsi_mgr_bridge_get_id(bridge);
415  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
416  	struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
417  	struct mipi_dsi_host *host = msm_dsi->host;
418  	bool is_bonded_dsi = IS_BONDED_DSI();
419  
420  	DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
421  
422  	if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
423  		return;
424  
425  	msm_dsi_host_set_display_mode(host, adjusted_mode);
426  	if (is_bonded_dsi && other_dsi)
427  		msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
428  }
429  
dsi_mgr_bridge_mode_valid(struct drm_bridge * bridge,const struct drm_display_info * info,const struct drm_display_mode * mode)430  static enum drm_mode_status dsi_mgr_bridge_mode_valid(struct drm_bridge *bridge,
431  						      const struct drm_display_info *info,
432  						      const struct drm_display_mode *mode)
433  {
434  	int id = dsi_mgr_bridge_get_id(bridge);
435  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
436  	struct mipi_dsi_host *host = msm_dsi->host;
437  	struct platform_device *pdev = msm_dsi->pdev;
438  	struct dev_pm_opp *opp;
439  	unsigned long byte_clk_rate;
440  
441  	byte_clk_rate = dsi_byte_clk_get_rate(host, IS_BONDED_DSI(), mode);
442  
443  	opp = dev_pm_opp_find_freq_ceil(&pdev->dev, &byte_clk_rate);
444  	if (!IS_ERR(opp)) {
445  		dev_pm_opp_put(opp);
446  	} else if (PTR_ERR(opp) == -ERANGE) {
447  		/*
448  		 * An empty table is created by devm_pm_opp_set_clkname() even
449  		 * if there is none. Thus find_freq_ceil will still return
450  		 * -ERANGE in such case.
451  		 */
452  		if (dev_pm_opp_get_opp_count(&pdev->dev) != 0)
453  			return MODE_CLOCK_RANGE;
454  	} else {
455  			return MODE_ERROR;
456  	}
457  
458  	return msm_dsi_host_check_dsc(host, mode);
459  }
460  
461  static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
462  	.pre_enable = dsi_mgr_bridge_pre_enable,
463  	.post_disable = dsi_mgr_bridge_post_disable,
464  	.mode_set = dsi_mgr_bridge_mode_set,
465  	.mode_valid = dsi_mgr_bridge_mode_valid,
466  };
467  
468  /* initialize bridge */
msm_dsi_manager_bridge_init(u8 id)469  struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
470  {
471  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
472  	struct drm_bridge *bridge = NULL;
473  	struct dsi_bridge *dsi_bridge;
474  	struct drm_encoder *encoder;
475  	int ret;
476  
477  	dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
478  				sizeof(*dsi_bridge), GFP_KERNEL);
479  	if (!dsi_bridge) {
480  		ret = -ENOMEM;
481  		goto fail;
482  	}
483  
484  	dsi_bridge->id = id;
485  
486  	encoder = msm_dsi->encoder;
487  
488  	bridge = &dsi_bridge->base;
489  	bridge->funcs = &dsi_mgr_bridge_funcs;
490  
491  	drm_bridge_add(bridge);
492  
493  	ret = drm_bridge_attach(encoder, bridge, NULL, 0);
494  	if (ret)
495  		goto fail;
496  
497  	return bridge;
498  
499  fail:
500  	if (bridge)
501  		msm_dsi_manager_bridge_destroy(bridge);
502  
503  	return ERR_PTR(ret);
504  }
505  
msm_dsi_manager_ext_bridge_init(u8 id)506  int msm_dsi_manager_ext_bridge_init(u8 id)
507  {
508  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
509  	struct drm_device *dev = msm_dsi->dev;
510  	struct drm_encoder *encoder;
511  	struct drm_bridge *int_bridge, *ext_bridge;
512  	int ret;
513  
514  	int_bridge = msm_dsi->bridge;
515  	ext_bridge = devm_drm_of_get_bridge(&msm_dsi->pdev->dev,
516  					    msm_dsi->pdev->dev.of_node, 1, 0);
517  	if (IS_ERR(ext_bridge))
518  		return PTR_ERR(ext_bridge);
519  
520  	msm_dsi->external_bridge = ext_bridge;
521  
522  	encoder = msm_dsi->encoder;
523  
524  	/*
525  	 * Try first to create the bridge without it creating its own
526  	 * connector.. currently some bridges support this, and others
527  	 * do not (and some support both modes)
528  	 */
529  	ret = drm_bridge_attach(encoder, ext_bridge, int_bridge,
530  			DRM_BRIDGE_ATTACH_NO_CONNECTOR);
531  	if (ret == -EINVAL) {
532  		/*
533  		 * link the internal dsi bridge to the external bridge,
534  		 * connector is created by the next bridge.
535  		 */
536  		ret = drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
537  		if (ret < 0)
538  			return ret;
539  	} else {
540  		struct drm_connector *connector;
541  
542  		/* We are in charge of the connector, create one now. */
543  		connector = drm_bridge_connector_init(dev, encoder);
544  		if (IS_ERR(connector)) {
545  			DRM_ERROR("Unable to create bridge connector\n");
546  			return PTR_ERR(connector);
547  		}
548  
549  		ret = drm_connector_attach_encoder(connector, encoder);
550  		if (ret < 0)
551  			return ret;
552  	}
553  
554  	/* The pipeline is ready, ping encoders if necessary */
555  	msm_dsi_manager_set_split_display(id);
556  
557  	return 0;
558  }
559  
msm_dsi_manager_bridge_destroy(struct drm_bridge * bridge)560  void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
561  {
562  	drm_bridge_remove(bridge);
563  }
564  
msm_dsi_manager_cmd_xfer(int id,const struct mipi_dsi_msg * msg)565  int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
566  {
567  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
568  	struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
569  	struct mipi_dsi_host *host = msm_dsi->host;
570  	bool is_read = (msg->rx_buf && msg->rx_len);
571  	bool need_sync = (IS_SYNC_NEEDED() && !is_read);
572  	int ret;
573  
574  	if (!msg->tx_buf || !msg->tx_len)
575  		return 0;
576  
577  	/* In bonded master case, panel requires the same commands sent to
578  	 * both DSI links. Host issues the command trigger to both links
579  	 * when DSI_1 calls the cmd transfer function, no matter it happens
580  	 * before or after DSI_0 cmd transfer.
581  	 */
582  	if (need_sync && (id == DSI_0))
583  		return is_read ? msg->rx_len : msg->tx_len;
584  
585  	if (need_sync && msm_dsi0) {
586  		ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
587  		if (ret) {
588  			pr_err("%s: failed to prepare non-trigger host, %d\n",
589  				__func__, ret);
590  			return ret;
591  		}
592  	}
593  	ret = msm_dsi_host_xfer_prepare(host, msg);
594  	if (ret) {
595  		pr_err("%s: failed to prepare host, %d\n", __func__, ret);
596  		goto restore_host0;
597  	}
598  
599  	ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
600  			msm_dsi_host_cmd_tx(host, msg);
601  
602  	msm_dsi_host_xfer_restore(host, msg);
603  
604  restore_host0:
605  	if (need_sync && msm_dsi0)
606  		msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
607  
608  	return ret;
609  }
610  
msm_dsi_manager_cmd_xfer_trigger(int id,u32 dma_base,u32 len)611  bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
612  {
613  	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
614  	struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
615  	struct mipi_dsi_host *host = msm_dsi->host;
616  
617  	if (IS_SYNC_NEEDED() && (id == DSI_0))
618  		return false;
619  
620  	if (IS_SYNC_NEEDED() && msm_dsi0)
621  		msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
622  
623  	msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
624  
625  	return true;
626  }
627  
msm_dsi_manager_register(struct msm_dsi * msm_dsi)628  int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
629  {
630  	struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
631  	int id = msm_dsi->id;
632  	int ret;
633  
634  	if (id >= DSI_MAX) {
635  		pr_err("%s: invalid id %d\n", __func__, id);
636  		return -EINVAL;
637  	}
638  
639  	if (msm_dsim->dsi[id]) {
640  		pr_err("%s: dsi%d already registered\n", __func__, id);
641  		return -EBUSY;
642  	}
643  
644  	msm_dsim->dsi[id] = msm_dsi;
645  
646  	ret = dsi_mgr_parse_of(msm_dsi->pdev->dev.of_node, id);
647  	if (ret) {
648  		pr_err("%s: failed to parse OF DSI info\n", __func__);
649  		goto fail;
650  	}
651  
652  	ret = dsi_mgr_setup_components(id);
653  	if (ret) {
654  		pr_err("%s: failed to register mipi dsi host for DSI %d: %d\n",
655  			__func__, id, ret);
656  		goto fail;
657  	}
658  
659  	return 0;
660  
661  fail:
662  	msm_dsim->dsi[id] = NULL;
663  	return ret;
664  }
665  
msm_dsi_manager_unregister(struct msm_dsi * msm_dsi)666  void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
667  {
668  	struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
669  
670  	if (msm_dsi->host)
671  		msm_dsi_host_unregister(msm_dsi->host);
672  
673  	if (msm_dsi->id >= 0)
674  		msm_dsim->dsi[msm_dsi->id] = NULL;
675  }
676  
msm_dsi_is_bonded_dsi(struct msm_dsi * msm_dsi)677  bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi)
678  {
679  	return IS_BONDED_DSI();
680  }
681  
msm_dsi_is_master_dsi(struct msm_dsi * msm_dsi)682  bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
683  {
684  	return IS_MASTER_DSI_LINK(msm_dsi->id);
685  }
686