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1// SPDX-License-Identifier: GPL-2.0-only2/*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_012#define DSI_CLOCK_SLAVE DSI_113 14#define DSI_LEFT DSI_015#define DSI_RIGHT DSI_116 17/* According to the current drm framework sequence, take the encoder of18 * DSI_1 as master encoder19 */20#define DSI_ENCODER_MASTER DSI_121#define DSI_ENCODER_SLAVE DSI_022 23struct msm_dsi_manager {24 struct msm_dsi *dsi[DSI_MAX];25 26 bool is_bonded_dsi;27 bool is_sync_needed;28 int master_dsi_link_id;29};30 31static struct msm_dsi_manager msm_dsim_glb;32 33#define IS_BONDED_DSI() (msm_dsim_glb.is_bonded_dsi)34#define IS_SYNC_NEEDED() (msm_dsim_glb.is_sync_needed)35#define IS_MASTER_DSI_LINK(id) (msm_dsim_glb.master_dsi_link_id == id)36 37static inline struct msm_dsi *dsi_mgr_get_dsi(int id)38{39 return msm_dsim_glb.dsi[id];40}41 42static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)43{44 return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];45}46 47static 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 and52 * 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 68static 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 device89 * has a chance to probe, and do not block the master90 * DSI device's probe.91 * Also, do not check defer for the slave host,92 * because only master DSI device adds the panel to global93 * 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 114static 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 125static int126dsi_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 programmed135 * during PLL0 clock's set_rate. The PHY1 reset called by host1 here136 * will silently reset those PHY1 registers. Therefore we need to reset137 * 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 167static 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 phy174 * In bonded dsi configuration, the phy should be disabled for the175 * 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 188struct 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 195static 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 201static int dsi_mgr_bridge_power_on(struct drm_bridge *bridge)202{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();209 int ret;210 211 DBG("id=%d", id);212 213 ret = dsi_mgr_phy_enable(id, phy_shared_timings);214 if (ret)215 goto phy_en_fail;216 217 ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_bonded_dsi, msm_dsi->phy);218 if (ret) {219 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);220 goto host_on_fail;221 }222 223 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);226 if (ret) {227 pr_err("%s: power on host1 failed, %d\n",228 __func__, ret);229 goto host1_on_fail;230 }231 }232 233 /*234 * Enable before preparing the panel, disable after unpreparing, so235 * that the panel can communicate over the DSI link.236 */237 msm_dsi_host_enable_irq(host);238 if (is_bonded_dsi && msm_dsi1)239 msm_dsi_host_enable_irq(msm_dsi1->host);240 241 return 0;242 243host1_on_fail:244 msm_dsi_host_power_off(host);245host_on_fail:246 dsi_mgr_phy_disable(id);247phy_en_fail:248 return ret;249}250 251static void dsi_mgr_bridge_power_off(struct drm_bridge *bridge)252{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();258 259 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);263 }264 msm_dsi_host_power_off(host);265 dsi_mgr_phy_disable(id);266}267 268static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)269{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();275 int ret;276 277 DBG("id=%d", id);278 279 /* 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))281 return;282 283 ret = dsi_mgr_bridge_power_on(bridge);284 if (ret) {285 dev_err(&msm_dsi->pdev->dev, "Power on failed: %d\n", ret);286 return;287 }288 289 ret = msm_dsi_host_enable(host);290 if (ret) {291 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);292 goto host_en_fail;293 }294 295 if (is_bonded_dsi && msm_dsi1) {296 ret = msm_dsi_host_enable(msm_dsi1->host);297 if (ret) {298 pr_err("%s: enable host1 failed, %d\n", __func__, ret);299 goto host1_en_fail;300 }301 }302 303 return;304 305host1_en_fail:306 msm_dsi_host_disable(host);307host_en_fail:308 dsi_mgr_bridge_power_off(bridge);309}310 311void msm_dsi_manager_tpg_enable(void)312{313 struct msm_dsi *m_dsi = dsi_mgr_get_dsi(DSI_0);314 struct msm_dsi *s_dsi = dsi_mgr_get_dsi(DSI_1);315 316 /* if dual dsi, trigger tpg on master first then slave */317 if (m_dsi) {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);321 }322}323 324static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)325{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();331 int ret;332 333 DBG("id=%d", id);334 335 /*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 PHY338 * won't be diabled until both PHYs request disable.339 */340 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))341 goto disable_phy;342 343 ret = msm_dsi_host_disable(host);344 if (ret)345 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);346 347 if (is_bonded_dsi && msm_dsi1) {348 ret = msm_dsi_host_disable(msm_dsi1->host);349 if (ret)350 pr_err("%s: host1 disable failed, %d\n", __func__, ret);351 }352 353 msm_dsi_host_disable_irq(host);354 if (is_bonded_dsi && msm_dsi1)355 msm_dsi_host_disable_irq(msm_dsi1->host);356 357 /* Save PHY status if it is a clock source */358 msm_dsi_phy_pll_save_state(msm_dsi->phy);359 360 ret = msm_dsi_host_power_off(host);361 if (ret)362 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);363 364 if (is_bonded_dsi && msm_dsi1) {365 ret = msm_dsi_host_power_off(msm_dsi1->host);366 if (ret)367 pr_err("%s: host1 power off failed, %d\n",368 __func__, ret);369 }370 371disable_phy:372 dsi_mgr_phy_disable(id);373}374 375static 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)378{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();384 385 DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));386 387 if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))388 return;389 390 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);393}394 395static 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)398{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;405 406 byte_clk_rate = dsi_byte_clk_get_rate(host, IS_BONDED_DSI(), mode);407 408 opp = dev_pm_opp_find_freq_ceil(&pdev->dev, &byte_clk_rate);409 if (!IS_ERR(opp)) {410 dev_pm_opp_put(opp);411 } else if (PTR_ERR(opp) == -ERANGE) {412 /*413 * An empty table is created by devm_pm_opp_set_clkname() even414 * if there is none. Thus find_freq_ceil will still return415 * -ERANGE in such case.416 */417 if (dev_pm_opp_get_opp_count(&pdev->dev) != 0)418 return MODE_CLOCK_RANGE;419 } else {420 return MODE_ERROR;421 }422 423 return msm_dsi_host_check_dsc(host, mode);424}425 426static int dsi_mgr_bridge_attach(struct drm_bridge *bridge,427 enum drm_bridge_attach_flags flags)428{429 int id = dsi_mgr_bridge_get_id(bridge);430 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);431 432 return drm_bridge_attach(bridge->encoder, msm_dsi->next_bridge,433 bridge, flags);434}435 436static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {437 .attach = dsi_mgr_bridge_attach,438 .pre_enable = dsi_mgr_bridge_pre_enable,439 .post_disable = dsi_mgr_bridge_post_disable,440 .mode_set = dsi_mgr_bridge_mode_set,441 .mode_valid = dsi_mgr_bridge_mode_valid,442};443 444/* initialize bridge */445int msm_dsi_manager_connector_init(struct msm_dsi *msm_dsi,446 struct drm_encoder *encoder)447{448 struct drm_device *dev = msm_dsi->dev;449 struct drm_bridge *bridge;450 struct dsi_bridge *dsi_bridge;451 struct drm_connector *connector;452 int ret;453 454 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,455 sizeof(*dsi_bridge), GFP_KERNEL);456 if (!dsi_bridge)457 return -ENOMEM;458 459 dsi_bridge->id = msm_dsi->id;460 461 bridge = &dsi_bridge->base;462 bridge->funcs = &dsi_mgr_bridge_funcs;463 464 ret = devm_drm_bridge_add(msm_dsi->dev->dev, bridge);465 if (ret)466 return ret;467 468 ret = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);469 if (ret)470 return ret;471 472 connector = drm_bridge_connector_init(dev, encoder);473 if (IS_ERR(connector)) {474 DRM_ERROR("Unable to create bridge connector\n");475 return PTR_ERR(connector);476 }477 478 ret = drm_connector_attach_encoder(connector, encoder);479 if (ret < 0)480 return ret;481 482 return 0;483}484 485int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)486{487 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);488 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);489 struct mipi_dsi_host *host = msm_dsi->host;490 bool is_read = (msg->rx_buf && msg->rx_len);491 bool need_sync = (IS_SYNC_NEEDED() && !is_read);492 int ret;493 494 if (!msg->tx_buf || !msg->tx_len)495 return 0;496 497 /* In bonded master case, panel requires the same commands sent to498 * both DSI links. Host issues the command trigger to both links499 * when DSI_1 calls the cmd transfer function, no matter it happens500 * before or after DSI_0 cmd transfer.501 */502 if (need_sync && (id == DSI_0))503 return is_read ? msg->rx_len : msg->tx_len;504 505 if (need_sync && msm_dsi0) {506 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);507 if (ret) {508 pr_err("%s: failed to prepare non-trigger host, %d\n",509 __func__, ret);510 return ret;511 }512 }513 ret = msm_dsi_host_xfer_prepare(host, msg);514 if (ret) {515 pr_err("%s: failed to prepare host, %d\n", __func__, ret);516 goto restore_host0;517 }518 519 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :520 msm_dsi_host_cmd_tx(host, msg);521 522 msm_dsi_host_xfer_restore(host, msg);523 524restore_host0:525 if (need_sync && msm_dsi0)526 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);527 528 return ret;529}530 531bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)532{533 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);534 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);535 struct mipi_dsi_host *host = msm_dsi->host;536 537 if (IS_SYNC_NEEDED() && (id == DSI_0))538 return false;539 540 if (IS_SYNC_NEEDED() && msm_dsi0)541 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);542 543 msm_dsi_host_cmd_xfer_commit(host, dma_base, len);544 545 return true;546}547 548int msm_dsi_manager_register(struct msm_dsi *msm_dsi)549{550 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;551 int id = msm_dsi->id;552 int ret;553 554 if (id >= DSI_MAX) {555 pr_err("%s: invalid id %d\n", __func__, id);556 return -EINVAL;557 }558 559 if (msm_dsim->dsi[id]) {560 pr_err("%s: dsi%d already registered\n", __func__, id);561 return -EBUSY;562 }563 564 msm_dsim->dsi[id] = msm_dsi;565 566 ret = dsi_mgr_parse_of(msm_dsi->pdev->dev.of_node, id);567 if (ret) {568 pr_err("%s: failed to parse OF DSI info\n", __func__);569 goto fail;570 }571 572 ret = dsi_mgr_setup_components(id);573 if (ret) {574 pr_err("%s: failed to register mipi dsi host for DSI %d: %d\n",575 __func__, id, ret);576 goto fail;577 }578 579 return 0;580 581fail:582 msm_dsim->dsi[id] = NULL;583 return ret;584}585 586void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)587{588 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;589 590 if (msm_dsi->host)591 msm_dsi_host_unregister(msm_dsi->host);592 593 if (msm_dsi->id >= 0)594 msm_dsim->dsi[msm_dsi->id] = NULL;595}596 597bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi)598{599 return IS_BONDED_DSI();600}601 602bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)603{604 return IS_MASTER_DSI_LINK(msm_dsi->id);605}606 607const char *msm_dsi_get_te_source(struct msm_dsi *msm_dsi)608{609 return msm_dsi->te_source;610}611