2 * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
3 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
5 * Mythri pk <mythripk@ti.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #define DSS_SUBSYS_NAME "HDMI"
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/err.h>
26 #include <linux/interrupt.h>
27 #include <linux/mutex.h>
28 #include <linux/delay.h>
29 #include <linux/string.h>
30 #include <linux/platform_device.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/clk.h>
33 #include <linux/gpio.h>
34 #include <linux/regulator/consumer.h>
35 #include <linux/component.h>
36 #include <video/omapfb_dss.h>
37 #include <sound/omap-hdmi-audio.h>
39 #include "hdmi4_core.h"
41 #include "dss_features.h"
44 static struct omap_hdmi hdmi;
46 static int hdmi_runtime_get(void)
50 DSSDBG("hdmi_runtime_get\n");
52 r = pm_runtime_get_sync(&hdmi.pdev->dev);
60 static void hdmi_runtime_put(void)
64 DSSDBG("hdmi_runtime_put\n");
66 r = pm_runtime_put_sync(&hdmi.pdev->dev);
67 WARN_ON(r < 0 && r != -ENOSYS);
70 static irqreturn_t hdmi_irq_handler(int irq, void *data)
72 struct hdmi_wp_data *wp = data;
75 irqstatus = hdmi_wp_get_irqstatus(wp);
76 hdmi_wp_set_irqstatus(wp, irqstatus);
78 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
79 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
81 * If we get both connect and disconnect interrupts at the same
82 * time, turn off the PHY, clear interrupts, and restart, which
83 * raises connect interrupt if a cable is connected, or nothing
84 * if cable is not connected.
86 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
88 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
89 HDMI_IRQ_LINK_DISCONNECT);
91 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
92 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
93 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
94 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
95 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
101 static int hdmi_init_regulator(void)
103 struct regulator *reg;
105 if (hdmi.vdda_reg != NULL)
108 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
111 if (PTR_ERR(reg) != -EPROBE_DEFER)
112 DSSERR("can't get VDDA regulator\n");
121 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
125 r = regulator_enable(hdmi.vdda_reg);
129 r = hdmi_runtime_get();
131 goto err_runtime_get;
133 /* Make selection of HDMI in DSS */
134 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
136 hdmi.core_enabled = true;
141 regulator_disable(hdmi.vdda_reg);
146 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
148 hdmi.core_enabled = false;
151 regulator_disable(hdmi.vdda_reg);
154 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
157 struct omap_video_timings *p;
158 struct omap_overlay_manager *mgr = hdmi.output.manager;
159 struct hdmi_wp_data *wp = &hdmi.wp;
160 struct dss_pll_clock_info hdmi_cinfo = { 0 };
162 r = hdmi_power_on_core(dssdev);
166 /* disable and clear irqs */
167 hdmi_wp_clear_irqenable(wp, 0xffffffff);
168 hdmi_wp_set_irqstatus(wp, 0xffffffff);
170 p = &hdmi.cfg.timings;
172 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
174 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
176 r = dss_pll_enable(&hdmi.pll.pll);
178 DSSERR("Failed to enable PLL\n");
182 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
184 DSSERR("Failed to configure PLL\n");
188 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
189 hdmi_cinfo.clkout[0]);
191 DSSDBG("Failed to configure PHY\n");
195 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
199 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
201 /* bypass TV gamma table */
202 dispc_enable_gamma_table(0);
205 dss_mgr_set_timings(mgr, p);
207 r = hdmi_wp_video_start(&hdmi.wp);
211 r = dss_mgr_enable(mgr);
215 hdmi_wp_set_irqenable(wp,
216 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
221 hdmi_wp_video_stop(&hdmi.wp);
223 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
227 dss_pll_disable(&hdmi.pll.pll);
229 hdmi_power_off_core(dssdev);
233 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
235 struct omap_overlay_manager *mgr = hdmi.output.manager;
237 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
239 dss_mgr_disable(mgr);
241 hdmi_wp_video_stop(&hdmi.wp);
243 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
245 dss_pll_disable(&hdmi.pll.pll);
247 hdmi_power_off_core(dssdev);
250 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
251 struct omap_video_timings *timings)
253 struct omap_dss_device *out = &hdmi.output;
255 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
261 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
262 struct omap_video_timings *timings)
264 mutex_lock(&hdmi.lock);
266 hdmi.cfg.timings = *timings;
268 dispc_set_tv_pclk(timings->pixelclock);
270 mutex_unlock(&hdmi.lock);
273 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
274 struct omap_video_timings *timings)
276 *timings = hdmi.cfg.timings;
279 static void hdmi_dump_regs(struct seq_file *s)
281 mutex_lock(&hdmi.lock);
283 if (hdmi_runtime_get()) {
284 mutex_unlock(&hdmi.lock);
288 hdmi_wp_dump(&hdmi.wp, s);
289 hdmi_pll_dump(&hdmi.pll, s);
290 hdmi_phy_dump(&hdmi.phy, s);
291 hdmi4_core_dump(&hdmi.core, s);
294 mutex_unlock(&hdmi.lock);
297 static int read_edid(u8 *buf, int len)
301 mutex_lock(&hdmi.lock);
303 r = hdmi_runtime_get();
306 r = hdmi4_read_edid(&hdmi.core, buf, len);
309 mutex_unlock(&hdmi.lock);
314 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
316 hdmi_wp_audio_enable(&hd->wp, true);
317 hdmi4_audio_start(&hd->core, &hd->wp);
320 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
322 hdmi4_audio_stop(&hd->core, &hd->wp);
323 hdmi_wp_audio_enable(&hd->wp, false);
326 static int hdmi_display_enable(struct omap_dss_device *dssdev)
328 struct omap_dss_device *out = &hdmi.output;
332 DSSDBG("ENTER hdmi_display_enable\n");
334 mutex_lock(&hdmi.lock);
336 if (out->manager == NULL) {
337 DSSERR("failed to enable display: no output/manager\n");
342 r = hdmi_power_on_full(dssdev);
344 DSSERR("failed to power on device\n");
348 if (hdmi.audio_configured) {
349 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
350 hdmi.cfg.timings.pixelclock);
352 DSSERR("Error restoring audio configuration: %d", r);
353 hdmi.audio_abort_cb(&hdmi.pdev->dev);
354 hdmi.audio_configured = false;
358 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
359 if (hdmi.audio_configured && hdmi.audio_playing)
360 hdmi_start_audio_stream(&hdmi);
361 hdmi.display_enabled = true;
362 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
364 mutex_unlock(&hdmi.lock);
368 mutex_unlock(&hdmi.lock);
372 static void hdmi_display_disable(struct omap_dss_device *dssdev)
376 DSSDBG("Enter hdmi_display_disable\n");
378 mutex_lock(&hdmi.lock);
380 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
381 hdmi_stop_audio_stream(&hdmi);
382 hdmi.display_enabled = false;
383 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
385 hdmi_power_off_full(dssdev);
387 mutex_unlock(&hdmi.lock);
390 static int hdmi_core_enable(struct omap_dss_device *dssdev)
394 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
396 mutex_lock(&hdmi.lock);
398 r = hdmi_power_on_core(dssdev);
400 DSSERR("failed to power on device\n");
404 mutex_unlock(&hdmi.lock);
408 mutex_unlock(&hdmi.lock);
412 static void hdmi_core_disable(struct omap_dss_device *dssdev)
414 DSSDBG("Enter omapdss_hdmi_core_disable\n");
416 mutex_lock(&hdmi.lock);
418 hdmi_power_off_core(dssdev);
420 mutex_unlock(&hdmi.lock);
423 static int hdmi_connect(struct omap_dss_device *dssdev,
424 struct omap_dss_device *dst)
426 struct omap_overlay_manager *mgr;
429 r = hdmi_init_regulator();
433 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
437 r = dss_mgr_connect(mgr, dssdev);
441 r = omapdss_output_set_device(dssdev, dst);
443 DSSERR("failed to connect output to new device: %s\n",
445 dss_mgr_disconnect(mgr, dssdev);
452 static void hdmi_disconnect(struct omap_dss_device *dssdev,
453 struct omap_dss_device *dst)
455 WARN_ON(dst != dssdev->dst);
457 if (dst != dssdev->dst)
460 omapdss_output_unset_device(dssdev);
463 dss_mgr_disconnect(dssdev->manager, dssdev);
466 static int hdmi_read_edid(struct omap_dss_device *dssdev,
472 need_enable = hdmi.core_enabled == false;
475 r = hdmi_core_enable(dssdev);
480 r = read_edid(edid, len);
483 hdmi_core_disable(dssdev);
488 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
489 const struct hdmi_avi_infoframe *avi)
491 hdmi.cfg.infoframe = *avi;
495 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
498 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
502 static const struct omapdss_hdmi_ops hdmi_ops = {
503 .connect = hdmi_connect,
504 .disconnect = hdmi_disconnect,
506 .enable = hdmi_display_enable,
507 .disable = hdmi_display_disable,
509 .check_timings = hdmi_display_check_timing,
510 .set_timings = hdmi_display_set_timing,
511 .get_timings = hdmi_display_get_timings,
513 .read_edid = hdmi_read_edid,
514 .set_infoframe = hdmi_set_infoframe,
515 .set_hdmi_mode = hdmi_set_hdmi_mode,
518 static void hdmi_init_output(struct platform_device *pdev)
520 struct omap_dss_device *out = &hdmi.output;
522 out->dev = &pdev->dev;
523 out->id = OMAP_DSS_OUTPUT_HDMI;
524 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
525 out->name = "hdmi.0";
526 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
527 out->ops.hdmi = &hdmi_ops;
528 out->owner = THIS_MODULE;
530 omapdss_register_output(out);
533 static void hdmi_uninit_output(struct platform_device *pdev)
535 struct omap_dss_device *out = &hdmi.output;
537 omapdss_unregister_output(out);
540 static int hdmi_probe_of(struct platform_device *pdev)
542 struct device_node *node = pdev->dev.of_node;
543 struct device_node *ep;
546 ep = omapdss_of_get_first_endpoint(node);
550 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
562 /* Audio callbacks */
563 static int hdmi_audio_startup(struct device *dev,
564 void (*abort_cb)(struct device *dev))
566 struct omap_hdmi *hd = dev_get_drvdata(dev);
569 mutex_lock(&hd->lock);
571 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
576 hd->audio_abort_cb = abort_cb;
579 mutex_unlock(&hd->lock);
584 static int hdmi_audio_shutdown(struct device *dev)
586 struct omap_hdmi *hd = dev_get_drvdata(dev);
588 mutex_lock(&hd->lock);
589 hd->audio_abort_cb = NULL;
590 hd->audio_configured = false;
591 hd->audio_playing = false;
592 mutex_unlock(&hd->lock);
597 static int hdmi_audio_start(struct device *dev)
599 struct omap_hdmi *hd = dev_get_drvdata(dev);
602 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
604 spin_lock_irqsave(&hd->audio_playing_lock, flags);
606 if (hd->display_enabled)
607 hdmi_start_audio_stream(hd);
608 hd->audio_playing = true;
610 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
614 static void hdmi_audio_stop(struct device *dev)
616 struct omap_hdmi *hd = dev_get_drvdata(dev);
619 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
621 spin_lock_irqsave(&hd->audio_playing_lock, flags);
623 if (hd->display_enabled)
624 hdmi_stop_audio_stream(hd);
625 hd->audio_playing = false;
627 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
630 static int hdmi_audio_config(struct device *dev,
631 struct omap_dss_audio *dss_audio)
633 struct omap_hdmi *hd = dev_get_drvdata(dev);
636 mutex_lock(&hd->lock);
638 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
643 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
644 hd->cfg.timings.pixelclock);
646 hd->audio_configured = true;
647 hd->audio_config = *dss_audio;
650 mutex_unlock(&hd->lock);
655 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
656 .audio_startup = hdmi_audio_startup,
657 .audio_shutdown = hdmi_audio_shutdown,
658 .audio_start = hdmi_audio_start,
659 .audio_stop = hdmi_audio_stop,
660 .audio_config = hdmi_audio_config,
663 static int hdmi_audio_register(struct device *dev)
665 struct omap_hdmi_audio_pdata pdata = {
667 .dss_version = omapdss_get_version(),
668 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
669 .ops = &hdmi_audio_ops,
672 hdmi.audio_pdev = platform_device_register_data(
673 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
674 &pdata, sizeof(pdata));
676 if (IS_ERR(hdmi.audio_pdev))
677 return PTR_ERR(hdmi.audio_pdev);
682 /* HDMI HW IP initialisation */
683 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
685 struct platform_device *pdev = to_platform_device(dev);
690 dev_set_drvdata(&pdev->dev, &hdmi);
692 mutex_init(&hdmi.lock);
693 spin_lock_init(&hdmi.audio_playing_lock);
695 if (pdev->dev.of_node) {
696 r = hdmi_probe_of(pdev);
701 r = hdmi_wp_init(pdev, &hdmi.wp);
705 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
709 r = hdmi_phy_init(pdev, &hdmi.phy);
713 r = hdmi4_core_init(pdev, &hdmi.core);
717 irq = platform_get_irq(pdev, 0);
719 DSSERR("platform_get_irq failed\n");
724 r = devm_request_threaded_irq(&pdev->dev, irq,
725 NULL, hdmi_irq_handler,
726 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
728 DSSERR("HDMI IRQ request failed\n");
732 pm_runtime_enable(&pdev->dev);
734 hdmi_init_output(pdev);
736 r = hdmi_audio_register(&pdev->dev);
738 DSSERR("Registering HDMI audio failed\n");
739 hdmi_uninit_output(pdev);
740 pm_runtime_disable(&pdev->dev);
744 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
748 hdmi_pll_uninit(&hdmi.pll);
752 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
754 struct platform_device *pdev = to_platform_device(dev);
757 platform_device_unregister(hdmi.audio_pdev);
759 hdmi_uninit_output(pdev);
761 hdmi_pll_uninit(&hdmi.pll);
763 pm_runtime_disable(&pdev->dev);
766 static const struct component_ops hdmi4_component_ops = {
768 .unbind = hdmi4_unbind,
771 static int hdmi4_probe(struct platform_device *pdev)
773 return component_add(&pdev->dev, &hdmi4_component_ops);
776 static int hdmi4_remove(struct platform_device *pdev)
778 component_del(&pdev->dev, &hdmi4_component_ops);
782 static int hdmi_runtime_suspend(struct device *dev)
789 static int hdmi_runtime_resume(struct device *dev)
793 r = dispc_runtime_get();
800 static const struct dev_pm_ops hdmi_pm_ops = {
801 .runtime_suspend = hdmi_runtime_suspend,
802 .runtime_resume = hdmi_runtime_resume,
805 static const struct of_device_id hdmi_of_match[] = {
806 { .compatible = "ti,omap4-hdmi", },
810 static struct platform_driver omapdss_hdmihw_driver = {
811 .probe = hdmi4_probe,
812 .remove = hdmi4_remove,
814 .name = "omapdss_hdmi",
816 .of_match_table = hdmi_of_match,
817 .suppress_bind_attrs = true,
821 int __init hdmi4_init_platform_driver(void)
823 return platform_driver_register(&omapdss_hdmihw_driver);
826 void hdmi4_uninit_platform_driver(void)
828 platform_driver_unregister(&omapdss_hdmihw_driver);