2 * HDMI driver for OMAP5
4 * Copyright (C) 2014 Texas Instruments Incorporated
9 * Archit Taneja <archit@ti.com>
10 * Tomi Valkeinen <tomi.valkeinen@ti.com>
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published by
14 * the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
21 * You should have received a copy of the GNU General Public License along with
22 * this program. If not, see <http://www.gnu.org/licenses/>.
25 #define DSS_SUBSYS_NAME "HDMI"
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/err.h>
31 #include <linux/interrupt.h>
32 #include <linux/mutex.h>
33 #include <linux/delay.h>
34 #include <linux/string.h>
35 #include <linux/platform_device.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/clk.h>
38 #include <linux/gpio.h>
39 #include <linux/regulator/consumer.h>
40 #include <linux/component.h>
42 #include <video/omapdss.h>
43 #include <sound/omap-hdmi-audio.h>
45 #include "hdmi5_core.h"
47 #include "dss_features.h"
49 static struct omap_hdmi hdmi;
51 static int hdmi_runtime_get(void)
55 DSSDBG("hdmi_runtime_get\n");
57 r = pm_runtime_get_sync(&hdmi.pdev->dev);
65 static void hdmi_runtime_put(void)
69 DSSDBG("hdmi_runtime_put\n");
71 r = pm_runtime_put_sync(&hdmi.pdev->dev);
72 WARN_ON(r < 0 && r != -ENOSYS);
75 static irqreturn_t hdmi_irq_handler(int irq, void *data)
77 struct hdmi_wp_data *wp = data;
80 irqstatus = hdmi_wp_get_irqstatus(wp);
81 hdmi_wp_set_irqstatus(wp, irqstatus);
83 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
84 irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
87 * If we get both connect and disconnect interrupts at the same
88 * time, turn off the PHY, clear interrupts, and restart, which
89 * raises connect interrupt if a cable is connected, or nothing
90 * if cable is not connected.
93 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
96 * We always get bogus CONNECT & DISCONNECT interrupts when
97 * setting the PHY to LDOON. To ignore those, we force the RXDET
98 * line to 0 until the PHY power state has been changed.
100 v = hdmi_read_reg(hdmi.phy.base, HDMI_TXPHY_PAD_CFG_CTRL);
101 v = FLD_MOD(v, 1, 15, 15); /* FORCE_RXDET_HIGH */
102 v = FLD_MOD(v, 0, 14, 7); /* RXDET_LINE */
103 hdmi_write_reg(hdmi.phy.base, HDMI_TXPHY_PAD_CFG_CTRL, v);
105 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
106 HDMI_IRQ_LINK_DISCONNECT);
108 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
110 REG_FLD_MOD(hdmi.phy.base, HDMI_TXPHY_PAD_CFG_CTRL, 0, 15, 15);
112 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
113 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
114 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
115 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
121 static int hdmi_init_regulator(void)
123 struct regulator *reg;
125 if (hdmi.vdda_reg != NULL)
128 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
130 DSSERR("can't get VDDA regulator\n");
139 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
143 r = regulator_enable(hdmi.vdda_reg);
147 r = hdmi_runtime_get();
149 goto err_runtime_get;
151 /* Make selection of HDMI in DSS */
152 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
154 hdmi.core_enabled = true;
159 regulator_disable(hdmi.vdda_reg);
164 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
166 hdmi.core_enabled = false;
169 regulator_disable(hdmi.vdda_reg);
172 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
175 struct omap_video_timings *p;
176 enum omap_channel channel = dssdev->dispc_channel;
177 struct dss_pll_clock_info hdmi_cinfo = { 0 };
180 r = hdmi_power_on_core(dssdev);
184 p = &hdmi.cfg.timings;
186 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
192 hdmi_pll_compute(&hdmi.pll, pc, &hdmi_cinfo);
194 /* disable and clear irqs */
195 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
196 hdmi_wp_set_irqstatus(&hdmi.wp,
197 hdmi_wp_get_irqstatus(&hdmi.wp));
199 r = dss_pll_enable(&hdmi.pll.pll);
201 DSSERR("Failed to enable PLL\n");
205 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
207 DSSERR("Failed to configure PLL\n");
211 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
212 hdmi_cinfo.clkout[0]);
214 DSSDBG("Failed to start PHY\n");
218 r = hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_LDOON);
222 hdmi5_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
224 /* bypass TV gamma table */
225 dispc_enable_gamma_table(0);
228 dss_mgr_set_timings(channel, p);
230 r = dss_mgr_enable(channel);
234 r = hdmi_wp_video_start(&hdmi.wp);
238 hdmi_wp_set_irqenable(&hdmi.wp,
239 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
244 dss_mgr_disable(channel);
246 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
250 dss_pll_disable(&hdmi.pll.pll);
252 hdmi_power_off_core(dssdev);
256 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
258 enum omap_channel channel = dssdev->dispc_channel;
260 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
262 hdmi_wp_video_stop(&hdmi.wp);
264 dss_mgr_disable(channel);
266 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
268 dss_pll_disable(&hdmi.pll.pll);
270 hdmi_power_off_core(dssdev);
273 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
274 struct omap_video_timings *timings)
276 if (!dispc_mgr_timings_ok(dssdev->dispc_channel, timings))
282 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
283 struct omap_video_timings *timings)
285 mutex_lock(&hdmi.lock);
287 hdmi.cfg.timings = *timings;
289 dispc_set_tv_pclk(timings->pixelclock);
291 mutex_unlock(&hdmi.lock);
294 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
295 struct omap_video_timings *timings)
297 *timings = hdmi.cfg.timings;
300 static void hdmi_dump_regs(struct seq_file *s)
302 mutex_lock(&hdmi.lock);
304 if (hdmi_runtime_get()) {
305 mutex_unlock(&hdmi.lock);
309 hdmi_wp_dump(&hdmi.wp, s);
310 hdmi_pll_dump(&hdmi.pll, s);
311 hdmi_phy_dump(&hdmi.phy, s);
312 hdmi5_core_dump(&hdmi.core, s);
315 mutex_unlock(&hdmi.lock);
318 static int read_edid(u8 *buf, int len)
323 mutex_lock(&hdmi.lock);
325 r = hdmi_runtime_get();
328 idlemode = REG_GET(hdmi.wp.base, HDMI_WP_SYSCONFIG, 3, 2);
330 REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, 1, 3, 2);
332 r = hdmi5_read_edid(&hdmi.core, buf, len);
334 REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, idlemode, 3, 2);
337 mutex_unlock(&hdmi.lock);
342 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
344 REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, 1, 3, 2);
345 hdmi_wp_audio_enable(&hd->wp, true);
346 hdmi_wp_audio_core_req_enable(&hd->wp, true);
349 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
351 hdmi_wp_audio_core_req_enable(&hd->wp, false);
352 hdmi_wp_audio_enable(&hd->wp, false);
353 REG_FLD_MOD(hd->wp.base, HDMI_WP_SYSCONFIG, hd->wp_idlemode, 3, 2);
356 static int hdmi_display_enable(struct omap_dss_device *dssdev)
358 struct omap_dss_device *out = &hdmi.output;
362 DSSDBG("ENTER hdmi_display_enable\n");
364 mutex_lock(&hdmi.lock);
366 if (!out->dispc_channel_connected) {
367 DSSERR("failed to enable display: no output/manager\n");
372 r = hdmi_power_on_full(dssdev);
374 DSSERR("failed to power on device\n");
378 if (hdmi.audio_configured) {
379 r = hdmi5_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
380 hdmi.cfg.timings.pixelclock);
382 DSSERR("Error restoring audio configuration: %d", r);
383 hdmi.audio_abort_cb(&hdmi.pdev->dev);
384 hdmi.audio_configured = false;
388 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
389 if (hdmi.audio_configured && hdmi.audio_playing)
390 hdmi_start_audio_stream(&hdmi);
391 hdmi.display_enabled = true;
392 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
394 mutex_unlock(&hdmi.lock);
398 mutex_unlock(&hdmi.lock);
402 static void hdmi_display_disable(struct omap_dss_device *dssdev)
406 DSSDBG("Enter hdmi_display_disable\n");
408 mutex_lock(&hdmi.lock);
410 spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
411 hdmi_stop_audio_stream(&hdmi);
412 hdmi.display_enabled = false;
413 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
415 hdmi_power_off_full(dssdev);
417 mutex_unlock(&hdmi.lock);
420 static int hdmi_core_enable(struct omap_dss_device *dssdev)
424 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
426 mutex_lock(&hdmi.lock);
428 r = hdmi_power_on_core(dssdev);
430 DSSERR("failed to power on device\n");
434 mutex_unlock(&hdmi.lock);
438 mutex_unlock(&hdmi.lock);
442 static void hdmi_core_disable(struct omap_dss_device *dssdev)
444 DSSDBG("Enter omapdss_hdmi_core_disable\n");
446 mutex_lock(&hdmi.lock);
448 hdmi_power_off_core(dssdev);
450 mutex_unlock(&hdmi.lock);
453 static int hdmi_connect(struct omap_dss_device *dssdev,
454 struct omap_dss_device *dst)
456 enum omap_channel channel = dssdev->dispc_channel;
459 r = hdmi_init_regulator();
463 r = dss_mgr_connect(channel, dssdev);
467 r = omapdss_output_set_device(dssdev, dst);
469 DSSERR("failed to connect output to new device: %s\n",
471 dss_mgr_disconnect(channel, dssdev);
478 static void hdmi_disconnect(struct omap_dss_device *dssdev,
479 struct omap_dss_device *dst)
481 enum omap_channel channel = dssdev->dispc_channel;
483 WARN_ON(dst != dssdev->dst);
485 if (dst != dssdev->dst)
488 omapdss_output_unset_device(dssdev);
490 dss_mgr_disconnect(channel, dssdev);
493 static int hdmi_read_edid(struct omap_dss_device *dssdev,
499 need_enable = hdmi.core_enabled == false;
502 r = hdmi_core_enable(dssdev);
507 r = read_edid(edid, len);
510 hdmi_core_disable(dssdev);
515 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
516 const struct hdmi_avi_infoframe *avi)
518 hdmi.cfg.infoframe = *avi;
522 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
525 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
529 static const struct omapdss_hdmi_ops hdmi_ops = {
530 .connect = hdmi_connect,
531 .disconnect = hdmi_disconnect,
533 .enable = hdmi_display_enable,
534 .disable = hdmi_display_disable,
536 .check_timings = hdmi_display_check_timing,
537 .set_timings = hdmi_display_set_timing,
538 .get_timings = hdmi_display_get_timings,
540 .read_edid = hdmi_read_edid,
541 .set_infoframe = hdmi_set_infoframe,
542 .set_hdmi_mode = hdmi_set_hdmi_mode,
545 static void hdmi_init_output(struct platform_device *pdev)
547 struct omap_dss_device *out = &hdmi.output;
549 out->dev = &pdev->dev;
550 out->id = OMAP_DSS_OUTPUT_HDMI;
551 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
552 out->name = "hdmi.0";
553 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
554 out->ops.hdmi = &hdmi_ops;
555 out->owner = THIS_MODULE;
557 omapdss_register_output(out);
560 static void hdmi_uninit_output(struct platform_device *pdev)
562 struct omap_dss_device *out = &hdmi.output;
564 omapdss_unregister_output(out);
567 static int hdmi_probe_of(struct platform_device *pdev)
569 struct device_node *node = pdev->dev.of_node;
570 struct device_node *ep;
573 ep = omapdss_of_get_first_endpoint(node);
577 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
589 /* Audio callbacks */
590 static int hdmi_audio_startup(struct device *dev,
591 void (*abort_cb)(struct device *dev))
593 struct omap_hdmi *hd = dev_get_drvdata(dev);
596 mutex_lock(&hd->lock);
598 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
603 hd->audio_abort_cb = abort_cb;
606 mutex_unlock(&hd->lock);
611 static int hdmi_audio_shutdown(struct device *dev)
613 struct omap_hdmi *hd = dev_get_drvdata(dev);
615 mutex_lock(&hd->lock);
616 hd->audio_abort_cb = NULL;
617 hd->audio_configured = false;
618 hd->audio_playing = false;
619 mutex_unlock(&hd->lock);
624 static int hdmi_audio_start(struct device *dev)
626 struct omap_hdmi *hd = dev_get_drvdata(dev);
629 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
631 spin_lock_irqsave(&hd->audio_playing_lock, flags);
633 if (hd->display_enabled)
634 hdmi_start_audio_stream(hd);
635 hd->audio_playing = true;
637 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
641 static void hdmi_audio_stop(struct device *dev)
643 struct omap_hdmi *hd = dev_get_drvdata(dev);
646 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
648 spin_lock_irqsave(&hd->audio_playing_lock, flags);
650 if (hd->display_enabled)
651 hdmi_stop_audio_stream(hd);
652 hd->audio_playing = false;
654 spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
657 static int hdmi_audio_config(struct device *dev,
658 struct omap_dss_audio *dss_audio)
660 struct omap_hdmi *hd = dev_get_drvdata(dev);
663 mutex_lock(&hd->lock);
665 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
670 ret = hdmi5_audio_config(&hd->core, &hd->wp, dss_audio,
671 hd->cfg.timings.pixelclock);
674 hd->audio_configured = true;
675 hd->audio_config = *dss_audio;
678 mutex_unlock(&hd->lock);
683 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
684 .audio_startup = hdmi_audio_startup,
685 .audio_shutdown = hdmi_audio_shutdown,
686 .audio_start = hdmi_audio_start,
687 .audio_stop = hdmi_audio_stop,
688 .audio_config = hdmi_audio_config,
691 static int hdmi_audio_register(struct device *dev)
693 struct omap_hdmi_audio_pdata pdata = {
695 .dss_version = omapdss_get_version(),
696 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
697 .ops = &hdmi_audio_ops,
700 hdmi.audio_pdev = platform_device_register_data(
701 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
702 &pdata, sizeof(pdata));
704 if (IS_ERR(hdmi.audio_pdev))
705 return PTR_ERR(hdmi.audio_pdev);
709 REG_GET(hdmi.wp.base, HDMI_WP_SYSCONFIG, 3, 2);
715 /* HDMI HW IP initialisation */
716 static int hdmi5_bind(struct device *dev, struct device *master, void *data)
718 struct platform_device *pdev = to_platform_device(dev);
723 dev_set_drvdata(&pdev->dev, &hdmi);
725 mutex_init(&hdmi.lock);
726 spin_lock_init(&hdmi.audio_playing_lock);
728 if (pdev->dev.of_node) {
729 r = hdmi_probe_of(pdev);
734 r = hdmi_wp_init(pdev, &hdmi.wp);
738 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
742 r = hdmi_phy_init(pdev, &hdmi.phy);
746 r = hdmi5_core_init(pdev, &hdmi.core);
750 irq = platform_get_irq(pdev, 0);
752 DSSERR("platform_get_irq failed\n");
757 r = devm_request_threaded_irq(&pdev->dev, irq,
758 NULL, hdmi_irq_handler,
759 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
761 DSSERR("HDMI IRQ request failed\n");
765 pm_runtime_enable(&pdev->dev);
767 hdmi_init_output(pdev);
769 r = hdmi_audio_register(&pdev->dev);
771 DSSERR("Registering HDMI audio failed %d\n", r);
772 hdmi_uninit_output(pdev);
773 pm_runtime_disable(&pdev->dev);
777 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
781 hdmi_pll_uninit(&hdmi.pll);
785 static void hdmi5_unbind(struct device *dev, struct device *master, void *data)
787 struct platform_device *pdev = to_platform_device(dev);
790 platform_device_unregister(hdmi.audio_pdev);
792 hdmi_uninit_output(pdev);
794 hdmi_pll_uninit(&hdmi.pll);
796 pm_runtime_disable(&pdev->dev);
799 static const struct component_ops hdmi5_component_ops = {
801 .unbind = hdmi5_unbind,
804 static int hdmi5_probe(struct platform_device *pdev)
806 return component_add(&pdev->dev, &hdmi5_component_ops);
809 static int hdmi5_remove(struct platform_device *pdev)
811 component_del(&pdev->dev, &hdmi5_component_ops);
815 static int hdmi_runtime_suspend(struct device *dev)
822 static int hdmi_runtime_resume(struct device *dev)
826 r = dispc_runtime_get();
833 static const struct dev_pm_ops hdmi_pm_ops = {
834 .runtime_suspend = hdmi_runtime_suspend,
835 .runtime_resume = hdmi_runtime_resume,
838 static const struct of_device_id hdmi_of_match[] = {
839 { .compatible = "ti,omap5-hdmi", },
840 { .compatible = "ti,dra7-hdmi", },
844 static struct platform_driver omapdss_hdmihw_driver = {
845 .probe = hdmi5_probe,
846 .remove = hdmi5_remove,
848 .name = "omapdss_hdmi5",
850 .of_match_table = hdmi_of_match,
851 .suppress_bind_attrs = true,
855 int __init hdmi5_init_platform_driver(void)
857 return platform_driver_register(&omapdss_hdmihw_driver);
860 void hdmi5_uninit_platform_driver(void)
862 platform_driver_unregister(&omapdss_hdmihw_driver);