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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * HDMI interface DSS driver for TI's OMAP4 family of SoCs.4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com/5 * Authors: Yong Zhi6 * Mythri pk <mythripk@ti.com>7 */8 9#define DSS_SUBSYS_NAME "HDMI"10 11#include <linux/kernel.h>12#include <linux/module.h>13#include <linux/err.h>14#include <linux/io.h>15#include <linux/interrupt.h>16#include <linux/mutex.h>17#include <linux/delay.h>18#include <linux/string.h>19#include <linux/platform_device.h>20#include <linux/pm_runtime.h>21#include <linux/clk.h>22#include <linux/of.h>23#include <linux/of_graph.h>24#include <linux/regulator/consumer.h>25#include <linux/component.h>26#include <video/omapfb_dss.h>27#include <sound/omap-hdmi-audio.h>28 29#include "hdmi4_core.h"30#include "dss.h"31#include "dss_features.h"32#include "hdmi.h"33 34static struct omap_hdmi hdmi;35 36static int hdmi_runtime_get(void)37{38 int r;39 40 DSSDBG("hdmi_runtime_get\n");41 42 r = pm_runtime_resume_and_get(&hdmi.pdev->dev);43 if (WARN_ON(r < 0))44 return r;45 46 return 0;47}48 49static void hdmi_runtime_put(void)50{51 int r;52 53 DSSDBG("hdmi_runtime_put\n");54 55 r = pm_runtime_put_sync(&hdmi.pdev->dev);56 WARN_ON(r < 0 && r != -ENOSYS);57}58 59static irqreturn_t hdmi_irq_handler(int irq, void *data)60{61 struct hdmi_wp_data *wp = data;62 u32 irqstatus;63 64 irqstatus = hdmi_wp_get_irqstatus(wp);65 hdmi_wp_set_irqstatus(wp, irqstatus);66 67 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&68 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {69 /*70 * If we get both connect and disconnect interrupts at the same71 * time, turn off the PHY, clear interrupts, and restart, which72 * raises connect interrupt if a cable is connected, or nothing73 * if cable is not connected.74 */75 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);76 77 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |78 HDMI_IRQ_LINK_DISCONNECT);79 80 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);81 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {82 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);83 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {84 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);85 }86 87 return IRQ_HANDLED;88}89 90static int hdmi_init_regulator(void)91{92 struct regulator *reg;93 94 if (hdmi.vdda_reg != NULL)95 return 0;96 97 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");98 99 if (IS_ERR(reg)) {100 if (PTR_ERR(reg) != -EPROBE_DEFER)101 DSSERR("can't get VDDA regulator\n");102 return PTR_ERR(reg);103 }104 105 hdmi.vdda_reg = reg;106 107 return 0;108}109 110static int hdmi_power_on_core(struct omap_dss_device *dssdev)111{112 int r;113 114 r = regulator_enable(hdmi.vdda_reg);115 if (r)116 return r;117 118 r = hdmi_runtime_get();119 if (r)120 goto err_runtime_get;121 122 /* Make selection of HDMI in DSS */123 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);124 125 hdmi.core_enabled = true;126 127 return 0;128 129err_runtime_get:130 regulator_disable(hdmi.vdda_reg);131 132 return r;133}134 135static void hdmi_power_off_core(struct omap_dss_device *dssdev)136{137 hdmi.core_enabled = false;138 139 hdmi_runtime_put();140 regulator_disable(hdmi.vdda_reg);141}142 143static int hdmi_power_on_full(struct omap_dss_device *dssdev)144{145 int r;146 struct omap_video_timings *p;147 struct omap_overlay_manager *mgr = hdmi.output.manager;148 struct hdmi_wp_data *wp = &hdmi.wp;149 struct dss_pll_clock_info hdmi_cinfo = { 0 };150 151 r = hdmi_power_on_core(dssdev);152 if (r)153 return r;154 155 /* disable and clear irqs */156 hdmi_wp_clear_irqenable(wp, 0xffffffff);157 hdmi_wp_set_irqstatus(wp, 0xffffffff);158 159 p = &hdmi.cfg.timings;160 161 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);162 163 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);164 165 r = dss_pll_enable(&hdmi.pll.pll);166 if (r) {167 DSSERR("Failed to enable PLL\n");168 goto err_pll_enable;169 }170 171 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);172 if (r) {173 DSSERR("Failed to configure PLL\n");174 goto err_pll_cfg;175 }176 177 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,178 hdmi_cinfo.clkout[0]);179 if (r) {180 DSSDBG("Failed to configure PHY\n");181 goto err_phy_cfg;182 }183 184 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);185 if (r)186 goto err_phy_pwr;187 188 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);189 190 /* bypass TV gamma table */191 dispc_enable_gamma_table(0);192 193 /* tv size */194 dss_mgr_set_timings(mgr, p);195 196 r = hdmi_wp_video_start(&hdmi.wp);197 if (r)198 goto err_vid_enable;199 200 r = dss_mgr_enable(mgr);201 if (r)202 goto err_mgr_enable;203 204 hdmi_wp_set_irqenable(wp,205 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);206 207 return 0;208 209err_mgr_enable:210 hdmi_wp_video_stop(&hdmi.wp);211err_vid_enable:212 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);213err_phy_pwr:214err_phy_cfg:215err_pll_cfg:216 dss_pll_disable(&hdmi.pll.pll);217err_pll_enable:218 hdmi_power_off_core(dssdev);219 return -EIO;220}221 222static void hdmi_power_off_full(struct omap_dss_device *dssdev)223{224 struct omap_overlay_manager *mgr = hdmi.output.manager;225 226 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);227 228 dss_mgr_disable(mgr);229 230 hdmi_wp_video_stop(&hdmi.wp);231 232 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);233 234 dss_pll_disable(&hdmi.pll.pll);235 236 hdmi_power_off_core(dssdev);237}238 239static int hdmi_display_check_timing(struct omap_dss_device *dssdev,240 struct omap_video_timings *timings)241{242 struct omap_dss_device *out = &hdmi.output;243 244 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))245 return -EINVAL;246 247 return 0;248}249 250static void hdmi_display_set_timing(struct omap_dss_device *dssdev,251 struct omap_video_timings *timings)252{253 mutex_lock(&hdmi.lock);254 255 hdmi.cfg.timings = *timings;256 257 dispc_set_tv_pclk(timings->pixelclock);258 259 mutex_unlock(&hdmi.lock);260}261 262static void hdmi_display_get_timings(struct omap_dss_device *dssdev,263 struct omap_video_timings *timings)264{265 *timings = hdmi.cfg.timings;266}267 268static void hdmi_dump_regs(struct seq_file *s)269{270 mutex_lock(&hdmi.lock);271 272 if (hdmi_runtime_get()) {273 mutex_unlock(&hdmi.lock);274 return;275 }276 277 hdmi_wp_dump(&hdmi.wp, s);278 hdmi_pll_dump(&hdmi.pll, s);279 hdmi_phy_dump(&hdmi.phy, s);280 hdmi4_core_dump(&hdmi.core, s);281 282 hdmi_runtime_put();283 mutex_unlock(&hdmi.lock);284}285 286static int read_edid(u8 *buf, int len)287{288 int r;289 290 mutex_lock(&hdmi.lock);291 292 r = hdmi_runtime_get();293 BUG_ON(r);294 295 r = hdmi4_read_edid(&hdmi.core, buf, len);296 297 hdmi_runtime_put();298 mutex_unlock(&hdmi.lock);299 300 return r;301}302 303static void hdmi_start_audio_stream(struct omap_hdmi *hd)304{305 hdmi_wp_audio_enable(&hd->wp, true);306 hdmi4_audio_start(&hd->core, &hd->wp);307}308 309static void hdmi_stop_audio_stream(struct omap_hdmi *hd)310{311 hdmi4_audio_stop(&hd->core, &hd->wp);312 hdmi_wp_audio_enable(&hd->wp, false);313}314 315static int hdmi_display_enable(struct omap_dss_device *dssdev)316{317 struct omap_dss_device *out = &hdmi.output;318 unsigned long flags;319 int r = 0;320 321 DSSDBG("ENTER hdmi_display_enable\n");322 323 mutex_lock(&hdmi.lock);324 325 if (out->manager == NULL) {326 DSSERR("failed to enable display: no output/manager\n");327 r = -ENODEV;328 goto err0;329 }330 331 r = hdmi_power_on_full(dssdev);332 if (r) {333 DSSERR("failed to power on device\n");334 goto err0;335 }336 337 if (hdmi.audio_configured) {338 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,339 hdmi.cfg.timings.pixelclock);340 if (r) {341 DSSERR("Error restoring audio configuration: %d", r);342 hdmi.audio_abort_cb(&hdmi.pdev->dev);343 hdmi.audio_configured = false;344 }345 }346 347 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);348 if (hdmi.audio_configured && hdmi.audio_playing)349 hdmi_start_audio_stream(&hdmi);350 hdmi.display_enabled = true;351 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);352 353 mutex_unlock(&hdmi.lock);354 return 0;355 356err0:357 mutex_unlock(&hdmi.lock);358 return r;359}360 361static void hdmi_display_disable(struct omap_dss_device *dssdev)362{363 unsigned long flags;364 365 DSSDBG("Enter hdmi_display_disable\n");366 367 mutex_lock(&hdmi.lock);368 369 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);370 hdmi_stop_audio_stream(&hdmi);371 hdmi.display_enabled = false;372 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);373 374 hdmi_power_off_full(dssdev);375 376 mutex_unlock(&hdmi.lock);377}378 379static int hdmi_core_enable(struct omap_dss_device *dssdev)380{381 int r = 0;382 383 DSSDBG("ENTER omapdss_hdmi_core_enable\n");384 385 mutex_lock(&hdmi.lock);386 387 r = hdmi_power_on_core(dssdev);388 if (r) {389 DSSERR("failed to power on device\n");390 goto err0;391 }392 393 mutex_unlock(&hdmi.lock);394 return 0;395 396err0:397 mutex_unlock(&hdmi.lock);398 return r;399}400 401static void hdmi_core_disable(struct omap_dss_device *dssdev)402{403 DSSDBG("Enter omapdss_hdmi_core_disable\n");404 405 mutex_lock(&hdmi.lock);406 407 hdmi_power_off_core(dssdev);408 409 mutex_unlock(&hdmi.lock);410}411 412static int hdmi_connect(struct omap_dss_device *dssdev,413 struct omap_dss_device *dst)414{415 struct omap_overlay_manager *mgr;416 int r;417 418 r = hdmi_init_regulator();419 if (r)420 return r;421 422 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);423 if (!mgr)424 return -ENODEV;425 426 r = dss_mgr_connect(mgr, dssdev);427 if (r)428 return r;429 430 r = omapdss_output_set_device(dssdev, dst);431 if (r) {432 DSSERR("failed to connect output to new device: %s\n",433 dst->name);434 dss_mgr_disconnect(mgr, dssdev);435 return r;436 }437 438 return 0;439}440 441static void hdmi_disconnect(struct omap_dss_device *dssdev,442 struct omap_dss_device *dst)443{444 WARN_ON(dst != dssdev->dst);445 446 if (dst != dssdev->dst)447 return;448 449 omapdss_output_unset_device(dssdev);450 451 if (dssdev->manager)452 dss_mgr_disconnect(dssdev->manager, dssdev);453}454 455static int hdmi_read_edid(struct omap_dss_device *dssdev,456 u8 *edid, int len)457{458 bool need_enable = !hdmi.core_enabled;459 int r;460 461 if (need_enable) {462 r = hdmi_core_enable(dssdev);463 if (r)464 return r;465 }466 467 r = read_edid(edid, len);468 469 if (need_enable)470 hdmi_core_disable(dssdev);471 472 return r;473}474 475static int hdmi_set_infoframe(struct omap_dss_device *dssdev,476 const struct hdmi_avi_infoframe *avi)477{478 hdmi.cfg.infoframe = *avi;479 return 0;480}481 482static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,483 bool hdmi_mode)484{485 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;486 return 0;487}488 489static const struct omapdss_hdmi_ops hdmi_ops = {490 .connect = hdmi_connect,491 .disconnect = hdmi_disconnect,492 493 .enable = hdmi_display_enable,494 .disable = hdmi_display_disable,495 496 .check_timings = hdmi_display_check_timing,497 .set_timings = hdmi_display_set_timing,498 .get_timings = hdmi_display_get_timings,499 500 .read_edid = hdmi_read_edid,501 .set_infoframe = hdmi_set_infoframe,502 .set_hdmi_mode = hdmi_set_hdmi_mode,503};504 505static void hdmi_init_output(struct platform_device *pdev)506{507 struct omap_dss_device *out = &hdmi.output;508 509 out->dev = &pdev->dev;510 out->id = OMAP_DSS_OUTPUT_HDMI;511 out->output_type = OMAP_DISPLAY_TYPE_HDMI;512 out->name = "hdmi.0";513 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;514 out->ops.hdmi = &hdmi_ops;515 out->owner = THIS_MODULE;516 517 omapdss_register_output(out);518}519 520static void hdmi_uninit_output(struct platform_device *pdev)521{522 struct omap_dss_device *out = &hdmi.output;523 524 omapdss_unregister_output(out);525}526 527static int hdmi_probe_of(struct platform_device *pdev)528{529 struct device_node *node = pdev->dev.of_node;530 struct device_node *ep;531 int r;532 533 ep = of_graph_get_endpoint_by_regs(node, 0, -1);534 if (!ep)535 return 0;536 537 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);538 if (r)539 goto err;540 541 of_node_put(ep);542 return 0;543 544err:545 of_node_put(ep);546 return r;547}548 549/* Audio callbacks */550static int hdmi_audio_startup(struct device *dev,551 void (*abort_cb)(struct device *dev))552{553 struct omap_hdmi *hd = dev_get_drvdata(dev);554 int ret = 0;555 556 mutex_lock(&hd->lock);557 558 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {559 ret = -EPERM;560 goto out;561 }562 563 hd->audio_abort_cb = abort_cb;564 565out:566 mutex_unlock(&hd->lock);567 568 return ret;569}570 571static int hdmi_audio_shutdown(struct device *dev)572{573 struct omap_hdmi *hd = dev_get_drvdata(dev);574 575 mutex_lock(&hd->lock);576 hd->audio_abort_cb = NULL;577 hd->audio_configured = false;578 hd->audio_playing = false;579 mutex_unlock(&hd->lock);580 581 return 0;582}583 584static int hdmi_audio_start(struct device *dev)585{586 struct omap_hdmi *hd = dev_get_drvdata(dev);587 unsigned long flags;588 589 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));590 591 spin_lock_irqsave(&hd->audio_playing_lock, flags);592 593 if (hd->display_enabled)594 hdmi_start_audio_stream(hd);595 hd->audio_playing = true;596 597 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);598 return 0;599}600 601static void hdmi_audio_stop(struct device *dev)602{603 struct omap_hdmi *hd = dev_get_drvdata(dev);604 unsigned long flags;605 606 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));607 608 spin_lock_irqsave(&hd->audio_playing_lock, flags);609 610 if (hd->display_enabled)611 hdmi_stop_audio_stream(hd);612 hd->audio_playing = false;613 614 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);615}616 617static int hdmi_audio_config(struct device *dev,618 struct omap_dss_audio *dss_audio)619{620 struct omap_hdmi *hd = dev_get_drvdata(dev);621 int ret;622 623 mutex_lock(&hd->lock);624 625 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {626 ret = -EPERM;627 goto out;628 }629 630 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,631 hd->cfg.timings.pixelclock);632 if (!ret) {633 hd->audio_configured = true;634 hd->audio_config = *dss_audio;635 }636out:637 mutex_unlock(&hd->lock);638 639 return ret;640}641 642static const struct omap_hdmi_audio_ops hdmi_audio_ops = {643 .audio_startup = hdmi_audio_startup,644 .audio_shutdown = hdmi_audio_shutdown,645 .audio_start = hdmi_audio_start,646 .audio_stop = hdmi_audio_stop,647 .audio_config = hdmi_audio_config,648};649 650static int hdmi_audio_register(struct device *dev)651{652 struct omap_hdmi_audio_pdata pdata = {653 .dev = dev,654 .version = 4,655 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),656 .ops = &hdmi_audio_ops,657 };658 659 hdmi.audio_pdev = platform_device_register_data(660 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,661 &pdata, sizeof(pdata));662 663 return PTR_ERR_OR_ZERO(hdmi.audio_pdev);664}665 666/* HDMI HW IP initialisation */667static int hdmi4_bind(struct device *dev, struct device *master, void *data)668{669 struct platform_device *pdev = to_platform_device(dev);670 int r;671 int irq;672 673 hdmi.pdev = pdev;674 platform_set_drvdata(pdev, &hdmi);675 676 mutex_init(&hdmi.lock);677 spin_lock_init(&hdmi.audio_playing_lock);678 679 if (pdev->dev.of_node) {680 r = hdmi_probe_of(pdev);681 if (r)682 return r;683 }684 685 r = hdmi_wp_init(pdev, &hdmi.wp);686 if (r)687 return r;688 689 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);690 if (r)691 return r;692 693 r = hdmi_phy_init(pdev, &hdmi.phy);694 if (r)695 goto err;696 697 r = hdmi4_core_init(pdev, &hdmi.core);698 if (r)699 goto err;700 701 irq = platform_get_irq(pdev, 0);702 if (irq < 0) {703 DSSERR("platform_get_irq failed\n");704 r = -ENODEV;705 goto err;706 }707 708 r = devm_request_threaded_irq(&pdev->dev, irq,709 NULL, hdmi_irq_handler,710 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);711 if (r) {712 DSSERR("HDMI IRQ request failed\n");713 goto err;714 }715 716 pm_runtime_enable(&pdev->dev);717 718 hdmi_init_output(pdev);719 720 r = hdmi_audio_register(&pdev->dev);721 if (r) {722 DSSERR("Registering HDMI audio failed\n");723 hdmi_uninit_output(pdev);724 pm_runtime_disable(&pdev->dev);725 return r;726 }727 728 dss_debugfs_create_file("hdmi", hdmi_dump_regs);729 730 return 0;731err:732 hdmi_pll_uninit(&hdmi.pll);733 return r;734}735 736static void hdmi4_unbind(struct device *dev, struct device *master, void *data)737{738 struct platform_device *pdev = to_platform_device(dev);739 740 if (hdmi.audio_pdev)741 platform_device_unregister(hdmi.audio_pdev);742 743 hdmi_uninit_output(pdev);744 745 hdmi_pll_uninit(&hdmi.pll);746 747 pm_runtime_disable(&pdev->dev);748}749 750static const struct component_ops hdmi4_component_ops = {751 .bind = hdmi4_bind,752 .unbind = hdmi4_unbind,753};754 755static int hdmi4_probe(struct platform_device *pdev)756{757 return component_add(&pdev->dev, &hdmi4_component_ops);758}759 760static void hdmi4_remove(struct platform_device *pdev)761{762 component_del(&pdev->dev, &hdmi4_component_ops);763}764 765static int hdmi_runtime_suspend(struct device *dev)766{767 dispc_runtime_put();768 769 return 0;770}771 772static int hdmi_runtime_resume(struct device *dev)773{774 int r;775 776 r = dispc_runtime_get();777 if (r < 0)778 return r;779 780 return 0;781}782 783static const struct dev_pm_ops hdmi_pm_ops = {784 .runtime_suspend = hdmi_runtime_suspend,785 .runtime_resume = hdmi_runtime_resume,786};787 788static const struct of_device_id hdmi_of_match[] = {789 { .compatible = "ti,omap4-hdmi", },790 {},791};792 793static struct platform_driver omapdss_hdmihw_driver = {794 .probe = hdmi4_probe,795 .remove = hdmi4_remove,796 .driver = {797 .name = "omapdss_hdmi",798 .pm = &hdmi_pm_ops,799 .of_match_table = hdmi_of_match,800 .suppress_bind_attrs = true,801 },802};803 804int __init hdmi4_init_platform_driver(void)805{806 return platform_driver_register(&omapdss_hdmihw_driver);807}808 809void hdmi4_uninit_platform_driver(void)810{811 platform_driver_unregister(&omapdss_hdmihw_driver);812}813