1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
6 #include "drm/drm_bridge_connector.h"
11 #define DSI_CLOCK_MASTER DSI_0
12 #define DSI_CLOCK_SLAVE DSI_1
14 #define DSI_LEFT DSI_0
15 #define DSI_RIGHT DSI_1
17 /* According to the current drm framework sequence, take the encoder of
18 * DSI_1 as master encoder
20 #define DSI_ENCODER_MASTER DSI_1
21 #define DSI_ENCODER_SLAVE DSI_0
23 struct msm_dsi_manager {
24 struct msm_dsi *dsi[DSI_MAX];
28 int master_dsi_link_id;
31 static struct msm_dsi_manager msm_dsim_glb;
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)
37 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
39 return msm_dsim_glb.dsi[id];
42 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
44 return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
47 static int dsi_mgr_parse_of(struct device_node *np, int id)
49 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
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.
54 if (!msm_dsim->is_bonded_dsi)
55 msm_dsim->is_bonded_dsi = of_property_read_bool(np, "qcom,dual-dsi-mode");
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");
68 static int dsi_mgr_setup_components(int id)
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);
76 if (!IS_BONDED_DSI()) {
77 ret = msm_dsi_host_register(msm_dsi->host);
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) ?
86 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
88 /* Register slave host first, so that slave DSI device
89 * has a chance to probe, and do not block the master
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.
95 ret = msm_dsi_host_register(slave_link_dsi->host);
98 ret = msm_dsi_host_register(master_link_dsi->host);
102 /* PLL0 is to drive both 2 DSI link clocks in bonded DSI mode. */
103 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
105 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
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);
114 static int enable_phy(struct msm_dsi *msm_dsi,
115 struct msm_dsi_phy_shared_timings *shared_timings)
117 struct msm_dsi_phy_clk_request clk_req;
118 bool is_bonded_dsi = IS_BONDED_DSI();
120 msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_bonded_dsi);
122 return msm_dsi_phy_enable(msm_dsi->phy, &clk_req, shared_timings);
126 dsi_mgr_phy_enable(int id,
127 struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
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);
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.
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);
144 ret = enable_phy(mdsi,
145 &shared_timings[DSI_CLOCK_MASTER]);
148 ret = enable_phy(sdsi,
149 &shared_timings[DSI_CLOCK_SLAVE]);
151 msm_dsi_phy_disable(mdsi->phy);
156 msm_dsi_host_reset_phy(msm_dsi->host);
157 ret = enable_phy(msm_dsi, &shared_timings[id]);
162 msm_dsi->phy_enabled = true;
167 static void dsi_mgr_phy_disable(int id)
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);
174 * In bonded dsi configuration, the phy should be disabled for the
175 * first controller only when the second controller is disabled.
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);
184 msm_dsi_phy_disable(msm_dsi->phy);
189 struct drm_bridge base;
193 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
195 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
197 struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
198 return dsi_bridge->id;
201 static int dsi_mgr_bridge_power_on(struct drm_bridge *bridge)
203 int id = dsi_mgr_bridge_get_id(bridge);
204 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
205 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
206 struct mipi_dsi_host *host = msm_dsi->host;
207 struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
208 bool is_bonded_dsi = IS_BONDED_DSI();
213 ret = dsi_mgr_phy_enable(id, phy_shared_timings);
217 ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_bonded_dsi, msm_dsi->phy);
219 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
223 if (is_bonded_dsi && msm_dsi1) {
224 ret = msm_dsi_host_power_on(msm_dsi1->host,
225 &phy_shared_timings[DSI_1], is_bonded_dsi, msm_dsi1->phy);
227 pr_err("%s: power on host1 failed, %d\n",
234 * Enable before preparing the panel, disable after unpreparing, so
235 * that the panel can communicate over the DSI link.
237 msm_dsi_host_enable_irq(host);
238 if (is_bonded_dsi && msm_dsi1)
239 msm_dsi_host_enable_irq(msm_dsi1->host);
244 msm_dsi_host_power_off(host);
246 dsi_mgr_phy_disable(id);
251 static void dsi_mgr_bridge_power_off(struct drm_bridge *bridge)
253 int id = dsi_mgr_bridge_get_id(bridge);
254 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
255 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
256 struct mipi_dsi_host *host = msm_dsi->host;
257 bool is_bonded_dsi = IS_BONDED_DSI();
259 msm_dsi_host_disable_irq(host);
260 if (is_bonded_dsi && msm_dsi1) {
261 msm_dsi_host_disable_irq(msm_dsi1->host);
262 msm_dsi_host_power_off(msm_dsi1->host);
264 msm_dsi_host_power_off(host);
265 dsi_mgr_phy_disable(id);
268 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
270 int id = dsi_mgr_bridge_get_id(bridge);
271 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
272 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
273 struct mipi_dsi_host *host = msm_dsi->host;
274 bool is_bonded_dsi = IS_BONDED_DSI();
279 /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
280 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
283 ret = dsi_mgr_bridge_power_on(bridge);
285 dev_err(&msm_dsi->pdev->dev, "Power on failed: %d\n", ret);
289 ret = msm_dsi_host_enable(host);
291 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
295 if (is_bonded_dsi && msm_dsi1) {
296 ret = msm_dsi_host_enable(msm_dsi1->host);
298 pr_err("%s: enable host1 failed, %d\n", __func__, ret);
306 msm_dsi_host_disable(host);
308 dsi_mgr_bridge_power_off(bridge);
311 void msm_dsi_manager_tpg_enable(void)
313 struct msm_dsi *m_dsi = dsi_mgr_get_dsi(DSI_0);
314 struct msm_dsi *s_dsi = dsi_mgr_get_dsi(DSI_1);
316 /* if dual dsi, trigger tpg on master first then slave */
318 msm_dsi_host_test_pattern_en(m_dsi->host);
319 if (IS_BONDED_DSI() && s_dsi)
320 msm_dsi_host_test_pattern_en(s_dsi->host);
324 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
326 int id = dsi_mgr_bridge_get_id(bridge);
327 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
328 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
329 struct mipi_dsi_host *host = msm_dsi->host;
330 bool is_bonded_dsi = IS_BONDED_DSI();
336 * Do nothing with the host if it is slave-DSI in case of bonded DSI.
337 * It is safe to call dsi_mgr_phy_disable() here because a single PHY
338 * won't be diabled until both PHYs request disable.
340 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
343 ret = msm_dsi_host_disable(host);
345 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
347 if (is_bonded_dsi && msm_dsi1) {
348 ret = msm_dsi_host_disable(msm_dsi1->host);
350 pr_err("%s: host1 disable failed, %d\n", __func__, ret);
353 msm_dsi_host_disable_irq(host);
354 if (is_bonded_dsi && msm_dsi1)
355 msm_dsi_host_disable_irq(msm_dsi1->host);
357 /* Save PHY status if it is a clock source */
358 msm_dsi_phy_pll_save_state(msm_dsi->phy);
360 ret = msm_dsi_host_power_off(host);
362 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
364 if (is_bonded_dsi && msm_dsi1) {
365 ret = msm_dsi_host_power_off(msm_dsi1->host);
367 pr_err("%s: host1 power off failed, %d\n",
372 dsi_mgr_phy_disable(id);
375 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
376 const struct drm_display_mode *mode,
377 const struct drm_display_mode *adjusted_mode)
379 int id = dsi_mgr_bridge_get_id(bridge);
380 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
381 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
382 struct mipi_dsi_host *host = msm_dsi->host;
383 bool is_bonded_dsi = IS_BONDED_DSI();
385 DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
387 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
390 msm_dsi_host_set_display_mode(host, adjusted_mode);
391 if (is_bonded_dsi && other_dsi)
392 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
395 static enum drm_mode_status dsi_mgr_bridge_mode_valid(struct drm_bridge *bridge,
396 const struct drm_display_info *info,
397 const struct drm_display_mode *mode)
399 int id = dsi_mgr_bridge_get_id(bridge);
400 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
401 struct mipi_dsi_host *host = msm_dsi->host;
402 struct platform_device *pdev = msm_dsi->pdev;
403 struct dev_pm_opp *opp;
404 unsigned long byte_clk_rate;
406 byte_clk_rate = dsi_byte_clk_get_rate(host, IS_BONDED_DSI(), mode);
408 opp = dev_pm_opp_find_freq_ceil(&pdev->dev, &byte_clk_rate);
411 } else if (PTR_ERR(opp) == -ERANGE) {
413 * An empty table is created by devm_pm_opp_set_clkname() even
414 * if there is none. Thus find_freq_ceil will still return
415 * -ERANGE in such case.
417 if (dev_pm_opp_get_opp_count(&pdev->dev) != 0)
418 return MODE_CLOCK_RANGE;
423 return msm_dsi_host_check_dsc(host, mode);
426 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
427 .pre_enable = dsi_mgr_bridge_pre_enable,
428 .post_disable = dsi_mgr_bridge_post_disable,
429 .mode_set = dsi_mgr_bridge_mode_set,
430 .mode_valid = dsi_mgr_bridge_mode_valid,
433 /* initialize bridge */
434 struct drm_bridge *msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi,
435 struct drm_encoder *encoder)
437 struct drm_bridge *bridge;
438 struct dsi_bridge *dsi_bridge;
441 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
442 sizeof(*dsi_bridge), GFP_KERNEL);
444 return ERR_PTR(-ENOMEM);
446 dsi_bridge->id = msm_dsi->id;
448 bridge = &dsi_bridge->base;
449 bridge->funcs = &dsi_mgr_bridge_funcs;
451 ret = devm_drm_bridge_add(msm_dsi->dev->dev, bridge);
455 ret = drm_bridge_attach(encoder, bridge, NULL, 0);
462 int msm_dsi_manager_ext_bridge_init(u8 id, struct drm_bridge *int_bridge)
464 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
465 struct drm_device *dev = msm_dsi->dev;
466 struct drm_encoder *encoder;
467 struct drm_bridge *ext_bridge;
470 ext_bridge = devm_drm_of_get_bridge(&msm_dsi->pdev->dev,
471 msm_dsi->pdev->dev.of_node, 1, 0);
472 if (IS_ERR(ext_bridge))
473 return PTR_ERR(ext_bridge);
475 encoder = int_bridge->encoder;
478 * Try first to create the bridge without it creating its own
479 * connector.. currently some bridges support this, and others
480 * do not (and some support both modes)
482 ret = drm_bridge_attach(encoder, ext_bridge, int_bridge,
483 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
484 if (ret == -EINVAL) {
486 * link the internal dsi bridge to the external bridge,
487 * connector is created by the next bridge.
489 ret = drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
493 struct drm_connector *connector;
495 /* We are in charge of the connector, create one now. */
496 connector = drm_bridge_connector_init(dev, encoder);
497 if (IS_ERR(connector)) {
498 DRM_ERROR("Unable to create bridge connector\n");
499 return PTR_ERR(connector);
502 ret = drm_connector_attach_encoder(connector, encoder);
510 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
512 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
513 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
514 struct mipi_dsi_host *host = msm_dsi->host;
515 bool is_read = (msg->rx_buf && msg->rx_len);
516 bool need_sync = (IS_SYNC_NEEDED() && !is_read);
519 if (!msg->tx_buf || !msg->tx_len)
522 /* In bonded master case, panel requires the same commands sent to
523 * both DSI links. Host issues the command trigger to both links
524 * when DSI_1 calls the cmd transfer function, no matter it happens
525 * before or after DSI_0 cmd transfer.
527 if (need_sync && (id == DSI_0))
528 return is_read ? msg->rx_len : msg->tx_len;
530 if (need_sync && msm_dsi0) {
531 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
533 pr_err("%s: failed to prepare non-trigger host, %d\n",
538 ret = msm_dsi_host_xfer_prepare(host, msg);
540 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
544 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
545 msm_dsi_host_cmd_tx(host, msg);
547 msm_dsi_host_xfer_restore(host, msg);
550 if (need_sync && msm_dsi0)
551 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
556 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
558 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
559 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
560 struct mipi_dsi_host *host = msm_dsi->host;
562 if (IS_SYNC_NEEDED() && (id == DSI_0))
565 if (IS_SYNC_NEEDED() && msm_dsi0)
566 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
568 msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
573 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
575 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
576 int id = msm_dsi->id;
580 pr_err("%s: invalid id %d\n", __func__, id);
584 if (msm_dsim->dsi[id]) {
585 pr_err("%s: dsi%d already registered\n", __func__, id);
589 msm_dsim->dsi[id] = msm_dsi;
591 ret = dsi_mgr_parse_of(msm_dsi->pdev->dev.of_node, id);
593 pr_err("%s: failed to parse OF DSI info\n", __func__);
597 ret = dsi_mgr_setup_components(id);
599 pr_err("%s: failed to register mipi dsi host for DSI %d: %d\n",
607 msm_dsim->dsi[id] = NULL;
611 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
613 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
616 msm_dsi_host_unregister(msm_dsi->host);
618 if (msm_dsi->id >= 0)
619 msm_dsim->dsi[msm_dsi->id] = NULL;
622 bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi)
624 return IS_BONDED_DSI();
627 bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
629 return IS_MASTER_DSI_LINK(msm_dsi->id);