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>
37 #include <sound/omap-hdmi-audio.h>
40 #include "hdmi4_core.h"
42 #include "dss_features.h"
45 static struct omap_hdmi hdmi;
47 static int hdmi_runtime_get(void)
51 DSSDBG("hdmi_runtime_get\n");
53 r = pm_runtime_get_sync(&hdmi.pdev->dev);
61 static void hdmi_runtime_put(void)
65 DSSDBG("hdmi_runtime_put\n");
67 r = pm_runtime_put_sync(&hdmi.pdev->dev);
68 WARN_ON(r < 0 && r != -ENOSYS);
71 static irqreturn_t hdmi_irq_handler(int irq, void *data)
73 struct hdmi_wp_data *wp = data;
76 irqstatus = hdmi_wp_get_irqstatus(wp);
77 hdmi_wp_set_irqstatus(wp, irqstatus);
79 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
80 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
82 * If we get both connect and disconnect interrupts at the same
83 * time, turn off the PHY, clear interrupts, and restart, which
84 * raises connect interrupt if a cable is connected, or nothing
85 * if cable is not connected.
87 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
89 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
90 HDMI_IRQ_LINK_DISCONNECT);
92 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
93 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
94 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
95 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
96 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
102 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");
122 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
126 r = regulator_enable(hdmi.vdda_reg);
130 r = hdmi_runtime_get();
132 goto err_runtime_get;
134 /* Make selection of HDMI in DSS */
135 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
137 hdmi.core_enabled = true;
142 regulator_disable(hdmi.vdda_reg);
147 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
149 hdmi.core_enabled = false;
152 regulator_disable(hdmi.vdda_reg);
155 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
158 struct omap_video_timings *p;
159 enum omap_channel channel = dssdev->dispc_channel;
160 struct hdmi_wp_data *wp = &hdmi.wp;
161 struct dss_pll_clock_info hdmi_cinfo = { 0 };
164 r = hdmi_power_on_core(dssdev);
168 /* disable and clear irqs */
169 hdmi_wp_clear_irqenable(wp, 0xffffffff);
170 hdmi_wp_set_irqstatus(wp, 0xffffffff);
172 p = &hdmi.cfg.timings;
174 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
180 /* DSS_HDMI_TCLK is bitclk / 10 */
183 dss_pll_calc_b(&hdmi.pll.pll, clk_get_rate(hdmi.pll.pll.clkin),
186 r = dss_pll_enable(&hdmi.pll.pll);
188 DSSERR("Failed to enable PLL\n");
192 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
194 DSSERR("Failed to configure PLL\n");
198 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
199 hdmi_cinfo.clkout[0]);
201 DSSDBG("Failed to configure PHY\n");
205 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
209 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
212 dss_mgr_set_timings(channel, p);
214 r = dss_mgr_enable(channel);
218 r = hdmi_wp_video_start(&hdmi.wp);
222 hdmi_wp_set_irqenable(wp,
223 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
228 dss_mgr_disable(channel);
230 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
234 dss_pll_disable(&hdmi.pll.pll);
236 hdmi_power_off_core(dssdev);
240 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
242 enum omap_channel channel = dssdev->dispc_channel;
244 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
246 hdmi_wp_video_stop(&hdmi.wp);
248 dss_mgr_disable(channel);
250 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
252 dss_pll_disable(&hdmi.pll.pll);
254 hdmi_power_off_core(dssdev);
257 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
258 struct omap_video_timings *timings)
260 if (!dispc_mgr_timings_ok(dssdev->dispc_channel, timings))
266 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
267 struct omap_video_timings *timings)
269 mutex_lock(&hdmi.lock);
271 hdmi.cfg.timings = *timings;
273 dispc_set_tv_pclk(timings->pixelclock);
275 mutex_unlock(&hdmi.lock);
278 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
279 struct omap_video_timings *timings)
281 *timings = hdmi.cfg.timings;
284 static void hdmi_dump_regs(struct seq_file *s)
286 mutex_lock(&hdmi.lock);
288 if (hdmi_runtime_get()) {
289 mutex_unlock(&hdmi.lock);
293 hdmi_wp_dump(&hdmi.wp, s);
294 hdmi_pll_dump(&hdmi.pll, s);
295 hdmi_phy_dump(&hdmi.phy, s);
296 hdmi4_core_dump(&hdmi.core, s);
299 mutex_unlock(&hdmi.lock);
302 static int read_edid(u8 *buf, int len)
306 mutex_lock(&hdmi.lock);
308 r = hdmi_runtime_get();
311 r = hdmi4_read_edid(&hdmi.core, buf, len);
314 mutex_unlock(&hdmi.lock);
319 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
321 hdmi_wp_audio_enable(&hd->wp, true);
322 hdmi4_audio_start(&hd->core, &hd->wp);
325 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
327 hdmi4_audio_stop(&hd->core, &hd->wp);
328 hdmi_wp_audio_enable(&hd->wp, false);
331 static int hdmi_display_enable(struct omap_dss_device *dssdev)
333 struct omap_dss_device *out = &hdmi.output;
337 DSSDBG("ENTER hdmi_display_enable\n");
339 mutex_lock(&hdmi.lock);
341 if (!out->dispc_channel_connected) {
342 DSSERR("failed to enable display: no output/manager\n");
347 r = hdmi_power_on_full(dssdev);
349 DSSERR("failed to power on device\n");
353 if (hdmi.audio_configured) {
354 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
355 hdmi.cfg.timings.pixelclock);
357 DSSERR("Error restoring audio configuration: %d", r);
358 hdmi.audio_abort_cb(&hdmi.pdev->dev);
359 hdmi.audio_configured = false;
363 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
364 if (hdmi.audio_configured && hdmi.audio_playing)
365 hdmi_start_audio_stream(&hdmi);
366 hdmi.display_enabled = true;
367 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
369 mutex_unlock(&hdmi.lock);
373 mutex_unlock(&hdmi.lock);
377 static void hdmi_display_disable(struct omap_dss_device *dssdev)
381 DSSDBG("Enter hdmi_display_disable\n");
383 mutex_lock(&hdmi.lock);
385 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
386 hdmi_stop_audio_stream(&hdmi);
387 hdmi.display_enabled = false;
388 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
390 hdmi_power_off_full(dssdev);
392 mutex_unlock(&hdmi.lock);
395 static int hdmi_core_enable(struct omap_dss_device *dssdev)
399 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
401 mutex_lock(&hdmi.lock);
403 r = hdmi_power_on_core(dssdev);
405 DSSERR("failed to power on device\n");
409 mutex_unlock(&hdmi.lock);
413 mutex_unlock(&hdmi.lock);
417 static void hdmi_core_disable(struct omap_dss_device *dssdev)
419 DSSDBG("Enter omapdss_hdmi_core_disable\n");
421 mutex_lock(&hdmi.lock);
423 hdmi_power_off_core(dssdev);
425 mutex_unlock(&hdmi.lock);
428 static int hdmi_connect(struct omap_dss_device *dssdev,
429 struct omap_dss_device *dst)
431 enum omap_channel channel = dssdev->dispc_channel;
434 r = hdmi_init_regulator();
438 r = dss_mgr_connect(channel, dssdev);
442 r = omapdss_output_set_device(dssdev, dst);
444 DSSERR("failed to connect output to new device: %s\n",
446 dss_mgr_disconnect(channel, dssdev);
453 static void hdmi_disconnect(struct omap_dss_device *dssdev,
454 struct omap_dss_device *dst)
456 enum omap_channel channel = dssdev->dispc_channel;
458 WARN_ON(dst != dssdev->dst);
460 if (dst != dssdev->dst)
463 omapdss_output_unset_device(dssdev);
465 dss_mgr_disconnect(channel, dssdev);
468 static int hdmi_read_edid(struct omap_dss_device *dssdev,
474 need_enable = hdmi.core_enabled == false;
477 r = hdmi_core_enable(dssdev);
482 r = read_edid(edid, len);
485 hdmi_core_disable(dssdev);
490 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
491 const struct hdmi_avi_infoframe *avi)
493 hdmi.cfg.infoframe = *avi;
497 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
500 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
504 static const struct omapdss_hdmi_ops hdmi_ops = {
505 .connect = hdmi_connect,
506 .disconnect = hdmi_disconnect,
508 .enable = hdmi_display_enable,
509 .disable = hdmi_display_disable,
511 .check_timings = hdmi_display_check_timing,
512 .set_timings = hdmi_display_set_timing,
513 .get_timings = hdmi_display_get_timings,
515 .read_edid = hdmi_read_edid,
516 .set_infoframe = hdmi_set_infoframe,
517 .set_hdmi_mode = hdmi_set_hdmi_mode,
520 static void hdmi_init_output(struct platform_device *pdev)
522 struct omap_dss_device *out = &hdmi.output;
524 out->dev = &pdev->dev;
525 out->id = OMAP_DSS_OUTPUT_HDMI;
526 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
527 out->name = "hdmi.0";
528 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
529 out->ops.hdmi = &hdmi_ops;
530 out->owner = THIS_MODULE;
532 omapdss_register_output(out);
535 static void hdmi_uninit_output(struct platform_device *pdev)
537 struct omap_dss_device *out = &hdmi.output;
539 omapdss_unregister_output(out);
542 static int hdmi_probe_of(struct platform_device *pdev)
544 struct device_node *node = pdev->dev.of_node;
545 struct device_node *ep;
548 ep = omapdss_of_get_first_endpoint(node);
552 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
564 /* Audio callbacks */
565 static int hdmi_audio_startup(struct device *dev,
566 void (*abort_cb)(struct device *dev))
568 struct omap_hdmi *hd = dev_get_drvdata(dev);
571 mutex_lock(&hd->lock);
573 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
578 hd->audio_abort_cb = abort_cb;
581 mutex_unlock(&hd->lock);
586 static int hdmi_audio_shutdown(struct device *dev)
588 struct omap_hdmi *hd = dev_get_drvdata(dev);
590 mutex_lock(&hd->lock);
591 hd->audio_abort_cb = NULL;
592 hd->audio_configured = false;
593 hd->audio_playing = false;
594 mutex_unlock(&hd->lock);
599 static int hdmi_audio_start(struct device *dev)
601 struct omap_hdmi *hd = dev_get_drvdata(dev);
604 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
606 spin_lock_irqsave(&hd->audio_playing_lock, flags);
608 if (hd->display_enabled)
609 hdmi_start_audio_stream(hd);
610 hd->audio_playing = true;
612 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
616 static void hdmi_audio_stop(struct device *dev)
618 struct omap_hdmi *hd = dev_get_drvdata(dev);
621 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
623 spin_lock_irqsave(&hd->audio_playing_lock, flags);
625 if (hd->display_enabled)
626 hdmi_stop_audio_stream(hd);
627 hd->audio_playing = false;
629 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
632 static int hdmi_audio_config(struct device *dev,
633 struct omap_dss_audio *dss_audio)
635 struct omap_hdmi *hd = dev_get_drvdata(dev);
638 mutex_lock(&hd->lock);
640 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
645 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
646 hd->cfg.timings.pixelclock);
648 hd->audio_configured = true;
649 hd->audio_config = *dss_audio;
652 mutex_unlock(&hd->lock);
657 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
658 .audio_startup = hdmi_audio_startup,
659 .audio_shutdown = hdmi_audio_shutdown,
660 .audio_start = hdmi_audio_start,
661 .audio_stop = hdmi_audio_stop,
662 .audio_config = hdmi_audio_config,
665 static int hdmi_audio_register(struct device *dev)
667 struct omap_hdmi_audio_pdata pdata = {
669 .dss_version = omapdss_get_version(),
670 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
671 .ops = &hdmi_audio_ops,
674 hdmi.audio_pdev = platform_device_register_data(
675 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
676 &pdata, sizeof(pdata));
678 if (IS_ERR(hdmi.audio_pdev))
679 return PTR_ERR(hdmi.audio_pdev);
684 /* HDMI HW IP initialisation */
685 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
687 struct platform_device *pdev = to_platform_device(dev);
692 dev_set_drvdata(&pdev->dev, &hdmi);
694 mutex_init(&hdmi.lock);
695 spin_lock_init(&hdmi.audio_playing_lock);
697 if (pdev->dev.of_node) {
698 r = hdmi_probe_of(pdev);
703 r = hdmi_wp_init(pdev, &hdmi.wp);
707 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
711 r = hdmi_phy_init(pdev, &hdmi.phy);
715 r = hdmi4_core_init(pdev, &hdmi.core);
719 irq = platform_get_irq(pdev, 0);
721 DSSERR("platform_get_irq failed\n");
726 r = devm_request_threaded_irq(&pdev->dev, irq,
727 NULL, hdmi_irq_handler,
728 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
730 DSSERR("HDMI IRQ request failed\n");
734 pm_runtime_enable(&pdev->dev);
736 hdmi_init_output(pdev);
738 r = hdmi_audio_register(&pdev->dev);
740 DSSERR("Registering HDMI audio failed\n");
741 hdmi_uninit_output(pdev);
742 pm_runtime_disable(&pdev->dev);
746 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
750 hdmi_pll_uninit(&hdmi.pll);
754 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
756 struct platform_device *pdev = to_platform_device(dev);
759 platform_device_unregister(hdmi.audio_pdev);
761 hdmi_uninit_output(pdev);
763 hdmi_pll_uninit(&hdmi.pll);
765 pm_runtime_disable(&pdev->dev);
768 static const struct component_ops hdmi4_component_ops = {
770 .unbind = hdmi4_unbind,
773 static int hdmi4_probe(struct platform_device *pdev)
775 return component_add(&pdev->dev, &hdmi4_component_ops);
778 static int hdmi4_remove(struct platform_device *pdev)
780 component_del(&pdev->dev, &hdmi4_component_ops);
784 static int hdmi_runtime_suspend(struct device *dev)
791 static int hdmi_runtime_resume(struct device *dev)
795 r = dispc_runtime_get();
802 static const struct dev_pm_ops hdmi_pm_ops = {
803 .runtime_suspend = hdmi_runtime_suspend,
804 .runtime_resume = hdmi_runtime_resume,
807 static const struct of_device_id hdmi_of_match[] = {
808 { .compatible = "ti,omap4-hdmi", },
812 static struct platform_driver omapdss_hdmihw_driver = {
813 .probe = hdmi4_probe,
814 .remove = hdmi4_remove,
816 .name = "omapdss_hdmi",
818 .of_match_table = hdmi_of_match,
819 .suppress_bind_attrs = true,
823 int __init hdmi4_init_platform_driver(void)
825 return platform_driver_register(&omapdss_hdmihw_driver);
828 void hdmi4_uninit_platform_driver(void)
830 platform_driver_unregister(&omapdss_hdmihw_driver);