1 // SPDX-License-Identifier: GPL-2.0-only
3 * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
6 * Mythri pk <mythripk@ti.com>
9 #define DSS_SUBSYS_NAME "HDMI"
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/err.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/gpio.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/component.h>
25 #include <video/omapfb_dss.h>
26 #include <sound/omap-hdmi-audio.h>
28 #include "hdmi4_core.h"
30 #include "dss_features.h"
33 static struct omap_hdmi hdmi;
35 static int hdmi_runtime_get(void)
39 DSSDBG("hdmi_runtime_get\n");
41 r = pm_runtime_get_sync(&hdmi.pdev->dev);
49 static void hdmi_runtime_put(void)
53 DSSDBG("hdmi_runtime_put\n");
55 r = pm_runtime_put_sync(&hdmi.pdev->dev);
56 WARN_ON(r < 0 && r != -ENOSYS);
59 static irqreturn_t hdmi_irq_handler(int irq, void *data)
61 struct hdmi_wp_data *wp = data;
64 irqstatus = hdmi_wp_get_irqstatus(wp);
65 hdmi_wp_set_irqstatus(wp, irqstatus);
67 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
68 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
70 * If we get both connect and disconnect interrupts at the same
71 * time, turn off the PHY, clear interrupts, and restart, which
72 * raises connect interrupt if a cable is connected, or nothing
73 * if cable is not connected.
75 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
77 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
78 HDMI_IRQ_LINK_DISCONNECT);
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);
90 static int hdmi_init_regulator(void)
92 struct regulator *reg;
94 if (hdmi.vdda_reg != NULL)
97 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
100 if (PTR_ERR(reg) != -EPROBE_DEFER)
101 DSSERR("can't get VDDA regulator\n");
110 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
114 r = regulator_enable(hdmi.vdda_reg);
118 r = hdmi_runtime_get();
120 goto err_runtime_get;
122 /* Make selection of HDMI in DSS */
123 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
125 hdmi.core_enabled = true;
130 regulator_disable(hdmi.vdda_reg);
135 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
137 hdmi.core_enabled = false;
140 regulator_disable(hdmi.vdda_reg);
143 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
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 };
151 r = hdmi_power_on_core(dssdev);
155 /* disable and clear irqs */
156 hdmi_wp_clear_irqenable(wp, 0xffffffff);
157 hdmi_wp_set_irqstatus(wp, 0xffffffff);
159 p = &hdmi.cfg.timings;
161 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
163 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
165 r = dss_pll_enable(&hdmi.pll.pll);
167 DSSERR("Failed to enable PLL\n");
171 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
173 DSSERR("Failed to configure PLL\n");
177 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
178 hdmi_cinfo.clkout[0]);
180 DSSDBG("Failed to configure PHY\n");
184 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
188 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
190 /* bypass TV gamma table */
191 dispc_enable_gamma_table(0);
194 dss_mgr_set_timings(mgr, p);
196 r = hdmi_wp_video_start(&hdmi.wp);
200 r = dss_mgr_enable(mgr);
204 hdmi_wp_set_irqenable(wp,
205 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
210 hdmi_wp_video_stop(&hdmi.wp);
212 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
216 dss_pll_disable(&hdmi.pll.pll);
218 hdmi_power_off_core(dssdev);
222 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
224 struct omap_overlay_manager *mgr = hdmi.output.manager;
226 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
228 dss_mgr_disable(mgr);
230 hdmi_wp_video_stop(&hdmi.wp);
232 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
234 dss_pll_disable(&hdmi.pll.pll);
236 hdmi_power_off_core(dssdev);
239 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
240 struct omap_video_timings *timings)
242 struct omap_dss_device *out = &hdmi.output;
244 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
250 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
251 struct omap_video_timings *timings)
253 mutex_lock(&hdmi.lock);
255 hdmi.cfg.timings = *timings;
257 dispc_set_tv_pclk(timings->pixelclock);
259 mutex_unlock(&hdmi.lock);
262 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
263 struct omap_video_timings *timings)
265 *timings = hdmi.cfg.timings;
268 static void hdmi_dump_regs(struct seq_file *s)
270 mutex_lock(&hdmi.lock);
272 if (hdmi_runtime_get()) {
273 mutex_unlock(&hdmi.lock);
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);
283 mutex_unlock(&hdmi.lock);
286 static int read_edid(u8 *buf, int len)
290 mutex_lock(&hdmi.lock);
292 r = hdmi_runtime_get();
295 r = hdmi4_read_edid(&hdmi.core, buf, len);
298 mutex_unlock(&hdmi.lock);
303 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
305 hdmi_wp_audio_enable(&hd->wp, true);
306 hdmi4_audio_start(&hd->core, &hd->wp);
309 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
311 hdmi4_audio_stop(&hd->core, &hd->wp);
312 hdmi_wp_audio_enable(&hd->wp, false);
315 static int hdmi_display_enable(struct omap_dss_device *dssdev)
317 struct omap_dss_device *out = &hdmi.output;
321 DSSDBG("ENTER hdmi_display_enable\n");
323 mutex_lock(&hdmi.lock);
325 if (out->manager == NULL) {
326 DSSERR("failed to enable display: no output/manager\n");
331 r = hdmi_power_on_full(dssdev);
333 DSSERR("failed to power on device\n");
337 if (hdmi.audio_configured) {
338 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
339 hdmi.cfg.timings.pixelclock);
341 DSSERR("Error restoring audio configuration: %d", r);
342 hdmi.audio_abort_cb(&hdmi.pdev->dev);
343 hdmi.audio_configured = false;
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);
353 mutex_unlock(&hdmi.lock);
357 mutex_unlock(&hdmi.lock);
361 static void hdmi_display_disable(struct omap_dss_device *dssdev)
365 DSSDBG("Enter hdmi_display_disable\n");
367 mutex_lock(&hdmi.lock);
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);
374 hdmi_power_off_full(dssdev);
376 mutex_unlock(&hdmi.lock);
379 static int hdmi_core_enable(struct omap_dss_device *dssdev)
383 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
385 mutex_lock(&hdmi.lock);
387 r = hdmi_power_on_core(dssdev);
389 DSSERR("failed to power on device\n");
393 mutex_unlock(&hdmi.lock);
397 mutex_unlock(&hdmi.lock);
401 static void hdmi_core_disable(struct omap_dss_device *dssdev)
403 DSSDBG("Enter omapdss_hdmi_core_disable\n");
405 mutex_lock(&hdmi.lock);
407 hdmi_power_off_core(dssdev);
409 mutex_unlock(&hdmi.lock);
412 static int hdmi_connect(struct omap_dss_device *dssdev,
413 struct omap_dss_device *dst)
415 struct omap_overlay_manager *mgr;
418 r = hdmi_init_regulator();
422 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
426 r = dss_mgr_connect(mgr, dssdev);
430 r = omapdss_output_set_device(dssdev, dst);
432 DSSERR("failed to connect output to new device: %s\n",
434 dss_mgr_disconnect(mgr, dssdev);
441 static void hdmi_disconnect(struct omap_dss_device *dssdev,
442 struct omap_dss_device *dst)
444 WARN_ON(dst != dssdev->dst);
446 if (dst != dssdev->dst)
449 omapdss_output_unset_device(dssdev);
452 dss_mgr_disconnect(dssdev->manager, dssdev);
455 static int hdmi_read_edid(struct omap_dss_device *dssdev,
458 bool need_enable = !hdmi.core_enabled;
462 r = hdmi_core_enable(dssdev);
467 r = read_edid(edid, len);
470 hdmi_core_disable(dssdev);
475 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
476 const struct hdmi_avi_infoframe *avi)
478 hdmi.cfg.infoframe = *avi;
482 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
485 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
489 static const struct omapdss_hdmi_ops hdmi_ops = {
490 .connect = hdmi_connect,
491 .disconnect = hdmi_disconnect,
493 .enable = hdmi_display_enable,
494 .disable = hdmi_display_disable,
496 .check_timings = hdmi_display_check_timing,
497 .set_timings = hdmi_display_set_timing,
498 .get_timings = hdmi_display_get_timings,
500 .read_edid = hdmi_read_edid,
501 .set_infoframe = hdmi_set_infoframe,
502 .set_hdmi_mode = hdmi_set_hdmi_mode,
505 static void hdmi_init_output(struct platform_device *pdev)
507 struct omap_dss_device *out = &hdmi.output;
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;
517 omapdss_register_output(out);
520 static void hdmi_uninit_output(struct platform_device *pdev)
522 struct omap_dss_device *out = &hdmi.output;
524 omapdss_unregister_output(out);
527 static int hdmi_probe_of(struct platform_device *pdev)
529 struct device_node *node = pdev->dev.of_node;
530 struct device_node *ep;
533 ep = omapdss_of_get_first_endpoint(node);
537 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
549 /* Audio callbacks */
550 static int hdmi_audio_startup(struct device *dev,
551 void (*abort_cb)(struct device *dev))
553 struct omap_hdmi *hd = dev_get_drvdata(dev);
556 mutex_lock(&hd->lock);
558 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
563 hd->audio_abort_cb = abort_cb;
566 mutex_unlock(&hd->lock);
571 static int hdmi_audio_shutdown(struct device *dev)
573 struct omap_hdmi *hd = dev_get_drvdata(dev);
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);
584 static int hdmi_audio_start(struct device *dev)
586 struct omap_hdmi *hd = dev_get_drvdata(dev);
589 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
591 spin_lock_irqsave(&hd->audio_playing_lock, flags);
593 if (hd->display_enabled)
594 hdmi_start_audio_stream(hd);
595 hd->audio_playing = true;
597 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
601 static void hdmi_audio_stop(struct device *dev)
603 struct omap_hdmi *hd = dev_get_drvdata(dev);
606 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
608 spin_lock_irqsave(&hd->audio_playing_lock, flags);
610 if (hd->display_enabled)
611 hdmi_stop_audio_stream(hd);
612 hd->audio_playing = false;
614 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
617 static int hdmi_audio_config(struct device *dev,
618 struct omap_dss_audio *dss_audio)
620 struct omap_hdmi *hd = dev_get_drvdata(dev);
623 mutex_lock(&hd->lock);
625 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
630 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
631 hd->cfg.timings.pixelclock);
633 hd->audio_configured = true;
634 hd->audio_config = *dss_audio;
637 mutex_unlock(&hd->lock);
642 static 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,
650 static int hdmi_audio_register(struct device *dev)
652 struct omap_hdmi_audio_pdata pdata = {
655 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
656 .ops = &hdmi_audio_ops,
659 hdmi.audio_pdev = platform_device_register_data(
660 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
661 &pdata, sizeof(pdata));
663 return PTR_ERR_OR_ZERO(hdmi.audio_pdev);
666 /* HDMI HW IP initialisation */
667 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
669 struct platform_device *pdev = to_platform_device(dev);
674 dev_set_drvdata(&pdev->dev, &hdmi);
676 mutex_init(&hdmi.lock);
677 spin_lock_init(&hdmi.audio_playing_lock);
679 if (pdev->dev.of_node) {
680 r = hdmi_probe_of(pdev);
685 r = hdmi_wp_init(pdev, &hdmi.wp);
689 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
693 r = hdmi_phy_init(pdev, &hdmi.phy);
697 r = hdmi4_core_init(pdev, &hdmi.core);
701 irq = platform_get_irq(pdev, 0);
703 DSSERR("platform_get_irq failed\n");
708 r = devm_request_threaded_irq(&pdev->dev, irq,
709 NULL, hdmi_irq_handler,
710 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
712 DSSERR("HDMI IRQ request failed\n");
716 pm_runtime_enable(&pdev->dev);
718 hdmi_init_output(pdev);
720 r = hdmi_audio_register(&pdev->dev);
722 DSSERR("Registering HDMI audio failed\n");
723 hdmi_uninit_output(pdev);
724 pm_runtime_disable(&pdev->dev);
728 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
732 hdmi_pll_uninit(&hdmi.pll);
736 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
738 struct platform_device *pdev = to_platform_device(dev);
741 platform_device_unregister(hdmi.audio_pdev);
743 hdmi_uninit_output(pdev);
745 hdmi_pll_uninit(&hdmi.pll);
747 pm_runtime_disable(&pdev->dev);
750 static const struct component_ops hdmi4_component_ops = {
752 .unbind = hdmi4_unbind,
755 static int hdmi4_probe(struct platform_device *pdev)
757 return component_add(&pdev->dev, &hdmi4_component_ops);
760 static int hdmi4_remove(struct platform_device *pdev)
762 component_del(&pdev->dev, &hdmi4_component_ops);
766 static int hdmi_runtime_suspend(struct device *dev)
773 static int hdmi_runtime_resume(struct device *dev)
777 r = dispc_runtime_get();
784 static const struct dev_pm_ops hdmi_pm_ops = {
785 .runtime_suspend = hdmi_runtime_suspend,
786 .runtime_resume = hdmi_runtime_resume,
789 static const struct of_device_id hdmi_of_match[] = {
790 { .compatible = "ti,omap4-hdmi", },
794 static struct platform_driver omapdss_hdmihw_driver = {
795 .probe = hdmi4_probe,
796 .remove = hdmi4_remove,
798 .name = "omapdss_hdmi",
800 .of_match_table = hdmi_of_match,
801 .suppress_bind_attrs = true,
805 int __init hdmi4_init_platform_driver(void)
807 return platform_driver_register(&omapdss_hdmihw_driver);
810 void hdmi4_uninit_platform_driver(void)
812 platform_driver_unregister(&omapdss_hdmihw_driver);