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)
104 struct regulator *reg;
106 if (hdmi.vdda_reg != NULL)
109 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
112 if (PTR_ERR(reg) != -EPROBE_DEFER)
113 DSSERR("can't get VDDA regulator\n");
117 r = regulator_set_voltage(reg, 1800000, 1800000);
119 devm_regulator_put(reg);
120 DSSWARN("can't set the regulator voltage\n");
129 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
133 r = regulator_enable(hdmi.vdda_reg);
137 r = hdmi_runtime_get();
139 goto err_runtime_get;
141 /* Make selection of HDMI in DSS */
142 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
144 hdmi.core_enabled = true;
149 regulator_disable(hdmi.vdda_reg);
154 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
156 hdmi.core_enabled = false;
159 regulator_disable(hdmi.vdda_reg);
162 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
165 struct omap_video_timings *p;
166 struct omap_overlay_manager *mgr = hdmi.output.manager;
167 struct hdmi_wp_data *wp = &hdmi.wp;
168 struct dss_pll_clock_info hdmi_cinfo = { 0 };
170 r = hdmi_power_on_core(dssdev);
174 /* disable and clear irqs */
175 hdmi_wp_clear_irqenable(wp, 0xffffffff);
176 hdmi_wp_set_irqstatus(wp, 0xffffffff);
178 p = &hdmi.cfg.timings;
180 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
182 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
184 r = dss_pll_enable(&hdmi.pll.pll);
186 DSSERR("Failed to enable PLL\n");
190 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
192 DSSERR("Failed to configure PLL\n");
196 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
197 hdmi_cinfo.clkout[0]);
199 DSSDBG("Failed to configure PHY\n");
203 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
207 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
209 /* bypass TV gamma table */
210 dispc_enable_gamma_table(0);
213 dss_mgr_set_timings(mgr, p);
215 r = hdmi_wp_video_start(&hdmi.wp);
219 r = dss_mgr_enable(mgr);
223 hdmi_wp_set_irqenable(wp,
224 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
229 hdmi_wp_video_stop(&hdmi.wp);
231 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
235 dss_pll_disable(&hdmi.pll.pll);
237 hdmi_power_off_core(dssdev);
241 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
243 struct omap_overlay_manager *mgr = hdmi.output.manager;
245 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
247 dss_mgr_disable(mgr);
249 hdmi_wp_video_stop(&hdmi.wp);
251 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
253 dss_pll_disable(&hdmi.pll.pll);
255 hdmi_power_off_core(dssdev);
258 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
259 struct omap_video_timings *timings)
261 struct omap_dss_device *out = &hdmi.output;
263 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
269 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
270 struct omap_video_timings *timings)
272 mutex_lock(&hdmi.lock);
274 hdmi.cfg.timings = *timings;
276 dispc_set_tv_pclk(timings->pixelclock);
278 mutex_unlock(&hdmi.lock);
281 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
282 struct omap_video_timings *timings)
284 *timings = hdmi.cfg.timings;
287 static void hdmi_dump_regs(struct seq_file *s)
289 mutex_lock(&hdmi.lock);
291 if (hdmi_runtime_get()) {
292 mutex_unlock(&hdmi.lock);
296 hdmi_wp_dump(&hdmi.wp, s);
297 hdmi_pll_dump(&hdmi.pll, s);
298 hdmi_phy_dump(&hdmi.phy, s);
299 hdmi4_core_dump(&hdmi.core, s);
302 mutex_unlock(&hdmi.lock);
305 static int read_edid(u8 *buf, int len)
309 mutex_lock(&hdmi.lock);
311 r = hdmi_runtime_get();
314 r = hdmi4_read_edid(&hdmi.core, buf, len);
317 mutex_unlock(&hdmi.lock);
322 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
324 hdmi_wp_audio_enable(&hd->wp, true);
325 hdmi4_audio_start(&hd->core, &hd->wp);
328 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
330 hdmi4_audio_stop(&hd->core, &hd->wp);
331 hdmi_wp_audio_enable(&hd->wp, false);
334 static int hdmi_display_enable(struct omap_dss_device *dssdev)
336 struct omap_dss_device *out = &hdmi.output;
340 DSSDBG("ENTER hdmi_display_enable\n");
342 mutex_lock(&hdmi.lock);
344 if (out->manager == NULL) {
345 DSSERR("failed to enable display: no output/manager\n");
350 r = hdmi_power_on_full(dssdev);
352 DSSERR("failed to power on device\n");
356 if (hdmi.audio_configured) {
357 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
358 hdmi.cfg.timings.pixelclock);
360 DSSERR("Error restoring audio configuration: %d", r);
361 hdmi.audio_abort_cb(&hdmi.pdev->dev);
362 hdmi.audio_configured = false;
366 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
367 if (hdmi.audio_configured && hdmi.audio_playing)
368 hdmi_start_audio_stream(&hdmi);
369 hdmi.display_enabled = true;
370 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
372 mutex_unlock(&hdmi.lock);
376 mutex_unlock(&hdmi.lock);
380 static void hdmi_display_disable(struct omap_dss_device *dssdev)
384 DSSDBG("Enter hdmi_display_disable\n");
386 mutex_lock(&hdmi.lock);
388 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
389 hdmi_stop_audio_stream(&hdmi);
390 hdmi.display_enabled = false;
391 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
393 hdmi_power_off_full(dssdev);
395 mutex_unlock(&hdmi.lock);
398 static int hdmi_core_enable(struct omap_dss_device *dssdev)
402 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
404 mutex_lock(&hdmi.lock);
406 r = hdmi_power_on_core(dssdev);
408 DSSERR("failed to power on device\n");
412 mutex_unlock(&hdmi.lock);
416 mutex_unlock(&hdmi.lock);
420 static void hdmi_core_disable(struct omap_dss_device *dssdev)
422 DSSDBG("Enter omapdss_hdmi_core_disable\n");
424 mutex_lock(&hdmi.lock);
426 hdmi_power_off_core(dssdev);
428 mutex_unlock(&hdmi.lock);
431 static int hdmi_connect(struct omap_dss_device *dssdev,
432 struct omap_dss_device *dst)
434 struct omap_overlay_manager *mgr;
437 r = hdmi_init_regulator();
441 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
445 r = dss_mgr_connect(mgr, dssdev);
449 r = omapdss_output_set_device(dssdev, dst);
451 DSSERR("failed to connect output to new device: %s\n",
453 dss_mgr_disconnect(mgr, dssdev);
460 static void hdmi_disconnect(struct omap_dss_device *dssdev,
461 struct omap_dss_device *dst)
463 WARN_ON(dst != dssdev->dst);
465 if (dst != dssdev->dst)
468 omapdss_output_unset_device(dssdev);
471 dss_mgr_disconnect(dssdev->manager, dssdev);
474 static int hdmi_read_edid(struct omap_dss_device *dssdev,
480 need_enable = hdmi.core_enabled == false;
483 r = hdmi_core_enable(dssdev);
488 r = read_edid(edid, len);
491 hdmi_core_disable(dssdev);
496 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
497 const struct hdmi_avi_infoframe *avi)
499 hdmi.cfg.infoframe = *avi;
503 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
506 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
510 static const struct omapdss_hdmi_ops hdmi_ops = {
511 .connect = hdmi_connect,
512 .disconnect = hdmi_disconnect,
514 .enable = hdmi_display_enable,
515 .disable = hdmi_display_disable,
517 .check_timings = hdmi_display_check_timing,
518 .set_timings = hdmi_display_set_timing,
519 .get_timings = hdmi_display_get_timings,
521 .read_edid = hdmi_read_edid,
522 .set_infoframe = hdmi_set_infoframe,
523 .set_hdmi_mode = hdmi_set_hdmi_mode,
526 static void hdmi_init_output(struct platform_device *pdev)
528 struct omap_dss_device *out = &hdmi.output;
530 out->dev = &pdev->dev;
531 out->id = OMAP_DSS_OUTPUT_HDMI;
532 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
533 out->name = "hdmi.0";
534 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
535 out->ops.hdmi = &hdmi_ops;
536 out->owner = THIS_MODULE;
538 omapdss_register_output(out);
541 static void hdmi_uninit_output(struct platform_device *pdev)
543 struct omap_dss_device *out = &hdmi.output;
545 omapdss_unregister_output(out);
548 static int hdmi_probe_of(struct platform_device *pdev)
550 struct device_node *node = pdev->dev.of_node;
551 struct device_node *ep;
554 ep = omapdss_of_get_first_endpoint(node);
558 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
570 /* Audio callbacks */
571 static int hdmi_audio_startup(struct device *dev,
572 void (*abort_cb)(struct device *dev))
574 struct omap_hdmi *hd = dev_get_drvdata(dev);
577 mutex_lock(&hd->lock);
579 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
584 hd->audio_abort_cb = abort_cb;
587 mutex_unlock(&hd->lock);
592 static int hdmi_audio_shutdown(struct device *dev)
594 struct omap_hdmi *hd = dev_get_drvdata(dev);
596 mutex_lock(&hd->lock);
597 hd->audio_abort_cb = NULL;
598 hd->audio_configured = false;
599 hd->audio_playing = false;
600 mutex_unlock(&hd->lock);
605 static int hdmi_audio_start(struct device *dev)
607 struct omap_hdmi *hd = dev_get_drvdata(dev);
610 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
612 spin_lock_irqsave(&hd->audio_playing_lock, flags);
614 if (hd->display_enabled)
615 hdmi_start_audio_stream(hd);
616 hd->audio_playing = true;
618 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
622 static void hdmi_audio_stop(struct device *dev)
624 struct omap_hdmi *hd = dev_get_drvdata(dev);
627 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
629 spin_lock_irqsave(&hd->audio_playing_lock, flags);
631 if (hd->display_enabled)
632 hdmi_stop_audio_stream(hd);
633 hd->audio_playing = false;
635 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
638 static int hdmi_audio_config(struct device *dev,
639 struct omap_dss_audio *dss_audio)
641 struct omap_hdmi *hd = dev_get_drvdata(dev);
644 mutex_lock(&hd->lock);
646 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
651 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
652 hd->cfg.timings.pixelclock);
654 hd->audio_configured = true;
655 hd->audio_config = *dss_audio;
658 mutex_unlock(&hd->lock);
663 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
664 .audio_startup = hdmi_audio_startup,
665 .audio_shutdown = hdmi_audio_shutdown,
666 .audio_start = hdmi_audio_start,
667 .audio_stop = hdmi_audio_stop,
668 .audio_config = hdmi_audio_config,
671 static int hdmi_audio_register(struct device *dev)
673 struct omap_hdmi_audio_pdata pdata = {
675 .dss_version = omapdss_get_version(),
676 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
677 .ops = &hdmi_audio_ops,
680 hdmi.audio_pdev = platform_device_register_data(
681 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
682 &pdata, sizeof(pdata));
684 if (IS_ERR(hdmi.audio_pdev))
685 return PTR_ERR(hdmi.audio_pdev);
690 /* HDMI HW IP initialisation */
691 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
693 struct platform_device *pdev = to_platform_device(dev);
698 dev_set_drvdata(&pdev->dev, &hdmi);
700 mutex_init(&hdmi.lock);
701 spin_lock_init(&hdmi.audio_playing_lock);
703 if (pdev->dev.of_node) {
704 r = hdmi_probe_of(pdev);
709 r = hdmi_wp_init(pdev, &hdmi.wp);
713 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
717 r = hdmi_phy_init(pdev, &hdmi.phy);
721 r = hdmi4_core_init(pdev, &hdmi.core);
725 irq = platform_get_irq(pdev, 0);
727 DSSERR("platform_get_irq failed\n");
732 r = devm_request_threaded_irq(&pdev->dev, irq,
733 NULL, hdmi_irq_handler,
734 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
736 DSSERR("HDMI IRQ request failed\n");
740 pm_runtime_enable(&pdev->dev);
742 hdmi_init_output(pdev);
744 r = hdmi_audio_register(&pdev->dev);
746 DSSERR("Registering HDMI audio failed\n");
747 hdmi_uninit_output(pdev);
748 pm_runtime_disable(&pdev->dev);
752 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
756 hdmi_pll_uninit(&hdmi.pll);
760 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
762 struct platform_device *pdev = to_platform_device(dev);
765 platform_device_unregister(hdmi.audio_pdev);
767 hdmi_uninit_output(pdev);
769 hdmi_pll_uninit(&hdmi.pll);
771 pm_runtime_disable(&pdev->dev);
774 static const struct component_ops hdmi4_component_ops = {
776 .unbind = hdmi4_unbind,
779 static int hdmi4_probe(struct platform_device *pdev)
781 return component_add(&pdev->dev, &hdmi4_component_ops);
784 static int hdmi4_remove(struct platform_device *pdev)
786 component_del(&pdev->dev, &hdmi4_component_ops);
790 static int hdmi_runtime_suspend(struct device *dev)
797 static int hdmi_runtime_resume(struct device *dev)
801 r = dispc_runtime_get();
808 static const struct dev_pm_ops hdmi_pm_ops = {
809 .runtime_suspend = hdmi_runtime_suspend,
810 .runtime_resume = hdmi_runtime_resume,
813 static const struct of_device_id hdmi_of_match[] = {
814 { .compatible = "ti,omap4-hdmi", },
818 static struct platform_driver omapdss_hdmihw_driver = {
819 .probe = hdmi4_probe,
820 .remove = hdmi4_remove,
822 .name = "omapdss_hdmi",
824 .of_match_table = hdmi_of_match,
825 .suppress_bind_attrs = true,
829 int __init hdmi4_init_platform_driver(void)
831 return platform_driver_register(&omapdss_hdmihw_driver);
834 void hdmi4_uninit_platform_driver(void)
836 platform_driver_unregister(&omapdss_hdmihw_driver);