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 <linux/of_graph.h>
38 #include <sound/omap-hdmi-audio.h>
41 #include "hdmi4_core.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 videomode *vm;
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);
174 DSSDBG("hdmi_power_on hactive= %d vactive = %d\n", vm->hactive,
178 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
181 /* DSS_HDMI_TCLK is bitclk / 10 */
184 dss_pll_calc_b(&hdmi.pll.pll, clk_get_rate(hdmi.pll.pll.clkin),
187 r = dss_pll_enable(&hdmi.pll.pll);
189 DSSERR("Failed to enable PLL\n");
193 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
195 DSSERR("Failed to configure PLL\n");
199 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
200 hdmi_cinfo.clkout[0]);
202 DSSDBG("Failed to configure PHY\n");
206 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
210 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
213 dss_mgr_set_timings(channel, vm);
215 r = dss_mgr_enable(channel);
219 r = hdmi_wp_video_start(&hdmi.wp);
223 hdmi_wp_set_irqenable(wp,
224 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
229 dss_mgr_disable(channel);
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 enum omap_channel channel = dssdev->dispc_channel;
245 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
247 hdmi_wp_video_stop(&hdmi.wp);
249 dss_mgr_disable(channel);
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 videomode *vm)
261 if (!dispc_mgr_timings_ok(dssdev->dispc_channel, vm))
267 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
268 struct videomode *vm)
270 mutex_lock(&hdmi.lock);
274 dispc_set_tv_pclk(vm->pixelclock);
276 mutex_unlock(&hdmi.lock);
279 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
280 struct videomode *vm)
285 static void hdmi_dump_regs(struct seq_file *s)
287 mutex_lock(&hdmi.lock);
289 if (hdmi_runtime_get()) {
290 mutex_unlock(&hdmi.lock);
294 hdmi_wp_dump(&hdmi.wp, s);
295 hdmi_pll_dump(&hdmi.pll, s);
296 hdmi_phy_dump(&hdmi.phy, s);
297 hdmi4_core_dump(&hdmi.core, s);
300 mutex_unlock(&hdmi.lock);
303 static int read_edid(u8 *buf, int len)
307 mutex_lock(&hdmi.lock);
309 r = hdmi_runtime_get();
312 r = hdmi4_read_edid(&hdmi.core, buf, len);
315 mutex_unlock(&hdmi.lock);
320 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
322 hdmi_wp_audio_enable(&hd->wp, true);
323 hdmi4_audio_start(&hd->core, &hd->wp);
326 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
328 hdmi4_audio_stop(&hd->core, &hd->wp);
329 hdmi_wp_audio_enable(&hd->wp, false);
332 static int hdmi_display_enable(struct omap_dss_device *dssdev)
334 struct omap_dss_device *out = &hdmi.output;
338 DSSDBG("ENTER hdmi_display_enable\n");
340 mutex_lock(&hdmi.lock);
342 if (!out->dispc_channel_connected) {
343 DSSERR("failed to enable display: no output/manager\n");
348 r = hdmi_power_on_full(dssdev);
350 DSSERR("failed to power on device\n");
354 if (hdmi.audio_configured) {
355 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
356 hdmi.cfg.vm.pixelclock);
358 DSSERR("Error restoring audio configuration: %d", r);
359 hdmi.audio_abort_cb(&hdmi.pdev->dev);
360 hdmi.audio_configured = false;
364 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
365 if (hdmi.audio_configured && hdmi.audio_playing)
366 hdmi_start_audio_stream(&hdmi);
367 hdmi.display_enabled = true;
368 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
370 mutex_unlock(&hdmi.lock);
374 mutex_unlock(&hdmi.lock);
378 static void hdmi_display_disable(struct omap_dss_device *dssdev)
382 DSSDBG("Enter hdmi_display_disable\n");
384 mutex_lock(&hdmi.lock);
386 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
387 hdmi_stop_audio_stream(&hdmi);
388 hdmi.display_enabled = false;
389 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
391 hdmi_power_off_full(dssdev);
393 mutex_unlock(&hdmi.lock);
396 static int hdmi_core_enable(struct omap_dss_device *dssdev)
400 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
402 mutex_lock(&hdmi.lock);
404 r = hdmi_power_on_core(dssdev);
406 DSSERR("failed to power on device\n");
410 mutex_unlock(&hdmi.lock);
414 mutex_unlock(&hdmi.lock);
418 static void hdmi_core_disable(struct omap_dss_device *dssdev)
420 DSSDBG("Enter omapdss_hdmi_core_disable\n");
422 mutex_lock(&hdmi.lock);
424 hdmi_power_off_core(dssdev);
426 mutex_unlock(&hdmi.lock);
429 static int hdmi_connect(struct omap_dss_device *dssdev,
430 struct omap_dss_device *dst)
432 enum omap_channel channel = dssdev->dispc_channel;
435 r = hdmi_init_regulator();
439 r = dss_mgr_connect(channel, dssdev);
443 r = omapdss_output_set_device(dssdev, dst);
445 DSSERR("failed to connect output to new device: %s\n",
447 dss_mgr_disconnect(channel, dssdev);
454 static void hdmi_disconnect(struct omap_dss_device *dssdev,
455 struct omap_dss_device *dst)
457 enum omap_channel channel = dssdev->dispc_channel;
459 WARN_ON(dst != dssdev->dst);
461 if (dst != dssdev->dst)
464 omapdss_output_unset_device(dssdev);
466 dss_mgr_disconnect(channel, dssdev);
469 static int hdmi_read_edid(struct omap_dss_device *dssdev,
475 need_enable = hdmi.core_enabled == false;
478 r = hdmi_core_enable(dssdev);
483 r = read_edid(edid, len);
486 hdmi_core_disable(dssdev);
491 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
492 const struct hdmi_avi_infoframe *avi)
494 hdmi.cfg.infoframe = *avi;
498 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
501 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
505 static const struct omapdss_hdmi_ops hdmi_ops = {
506 .connect = hdmi_connect,
507 .disconnect = hdmi_disconnect,
509 .enable = hdmi_display_enable,
510 .disable = hdmi_display_disable,
512 .check_timings = hdmi_display_check_timing,
513 .set_timings = hdmi_display_set_timing,
514 .get_timings = hdmi_display_get_timings,
516 .read_edid = hdmi_read_edid,
517 .set_infoframe = hdmi_set_infoframe,
518 .set_hdmi_mode = hdmi_set_hdmi_mode,
521 static void hdmi_init_output(struct platform_device *pdev)
523 struct omap_dss_device *out = &hdmi.output;
525 out->dev = &pdev->dev;
526 out->id = OMAP_DSS_OUTPUT_HDMI;
527 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
528 out->name = "hdmi.0";
529 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
530 out->ops.hdmi = &hdmi_ops;
531 out->owner = THIS_MODULE;
533 omapdss_register_output(out);
536 static void hdmi_uninit_output(struct platform_device *pdev)
538 struct omap_dss_device *out = &hdmi.output;
540 omapdss_unregister_output(out);
543 static int hdmi_probe_of(struct platform_device *pdev)
545 struct device_node *node = pdev->dev.of_node;
546 struct device_node *ep;
549 ep = of_graph_get_endpoint_by_regs(node, 0, 0);
553 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
565 /* Audio callbacks */
566 static int hdmi_audio_startup(struct device *dev,
567 void (*abort_cb)(struct device *dev))
569 struct omap_hdmi *hd = dev_get_drvdata(dev);
572 mutex_lock(&hd->lock);
574 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
579 hd->audio_abort_cb = abort_cb;
582 mutex_unlock(&hd->lock);
587 static int hdmi_audio_shutdown(struct device *dev)
589 struct omap_hdmi *hd = dev_get_drvdata(dev);
591 mutex_lock(&hd->lock);
592 hd->audio_abort_cb = NULL;
593 hd->audio_configured = false;
594 hd->audio_playing = false;
595 mutex_unlock(&hd->lock);
600 static int hdmi_audio_start(struct device *dev)
602 struct omap_hdmi *hd = dev_get_drvdata(dev);
605 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
607 spin_lock_irqsave(&hd->audio_playing_lock, flags);
609 if (hd->display_enabled)
610 hdmi_start_audio_stream(hd);
611 hd->audio_playing = true;
613 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
617 static void hdmi_audio_stop(struct device *dev)
619 struct omap_hdmi *hd = dev_get_drvdata(dev);
622 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
624 spin_lock_irqsave(&hd->audio_playing_lock, flags);
626 if (hd->display_enabled)
627 hdmi_stop_audio_stream(hd);
628 hd->audio_playing = false;
630 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
633 static int hdmi_audio_config(struct device *dev,
634 struct omap_dss_audio *dss_audio)
636 struct omap_hdmi *hd = dev_get_drvdata(dev);
639 mutex_lock(&hd->lock);
641 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
646 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
647 hd->cfg.vm.pixelclock);
649 hd->audio_configured = true;
650 hd->audio_config = *dss_audio;
653 mutex_unlock(&hd->lock);
658 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
659 .audio_startup = hdmi_audio_startup,
660 .audio_shutdown = hdmi_audio_shutdown,
661 .audio_start = hdmi_audio_start,
662 .audio_stop = hdmi_audio_stop,
663 .audio_config = hdmi_audio_config,
666 static int hdmi_audio_register(struct device *dev)
668 struct omap_hdmi_audio_pdata pdata = {
671 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
672 .ops = &hdmi_audio_ops,
675 hdmi.audio_pdev = platform_device_register_data(
676 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
677 &pdata, sizeof(pdata));
679 if (IS_ERR(hdmi.audio_pdev))
680 return PTR_ERR(hdmi.audio_pdev);
685 /* HDMI HW IP initialisation */
686 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
688 struct platform_device *pdev = to_platform_device(dev);
693 dev_set_drvdata(&pdev->dev, &hdmi);
695 mutex_init(&hdmi.lock);
696 spin_lock_init(&hdmi.audio_playing_lock);
698 r = hdmi_probe_of(pdev);
702 r = hdmi_wp_init(pdev, &hdmi.wp, 4);
706 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
710 r = hdmi_phy_init(pdev, &hdmi.phy, 4);
714 r = hdmi4_core_init(pdev, &hdmi.core);
718 irq = platform_get_irq(pdev, 0);
720 DSSERR("platform_get_irq failed\n");
725 r = devm_request_threaded_irq(&pdev->dev, irq,
726 NULL, hdmi_irq_handler,
727 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
729 DSSERR("HDMI IRQ request failed\n");
733 pm_runtime_enable(&pdev->dev);
735 hdmi_init_output(pdev);
737 r = hdmi_audio_register(&pdev->dev);
739 DSSERR("Registering HDMI audio failed\n");
740 hdmi_uninit_output(pdev);
741 pm_runtime_disable(&pdev->dev);
745 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
749 hdmi_pll_uninit(&hdmi.pll);
753 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
755 struct platform_device *pdev = to_platform_device(dev);
758 platform_device_unregister(hdmi.audio_pdev);
760 hdmi_uninit_output(pdev);
762 hdmi_pll_uninit(&hdmi.pll);
764 pm_runtime_disable(&pdev->dev);
767 static const struct component_ops hdmi4_component_ops = {
769 .unbind = hdmi4_unbind,
772 static int hdmi4_probe(struct platform_device *pdev)
774 return component_add(&pdev->dev, &hdmi4_component_ops);
777 static int hdmi4_remove(struct platform_device *pdev)
779 component_del(&pdev->dev, &hdmi4_component_ops);
783 static int hdmi_runtime_suspend(struct device *dev)
790 static int hdmi_runtime_resume(struct device *dev)
794 r = dispc_runtime_get();
801 static const struct dev_pm_ops hdmi_pm_ops = {
802 .runtime_suspend = hdmi_runtime_suspend,
803 .runtime_resume = hdmi_runtime_resume,
806 static const struct of_device_id hdmi_of_match[] = {
807 { .compatible = "ti,omap4-hdmi", },
811 static struct platform_driver omapdss_hdmihw_driver = {
812 .probe = hdmi4_probe,
813 .remove = hdmi4_remove,
815 .name = "omapdss_hdmi",
817 .of_match_table = hdmi_of_match,
818 .suppress_bind_attrs = true,
822 int __init hdmi4_init_platform_driver(void)
824 return platform_driver_register(&omapdss_hdmihw_driver);
827 void hdmi4_uninit_platform_driver(void)
829 platform_driver_unregister(&omapdss_hdmihw_driver);