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/omapdss.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 if (regulator_can_change_voltage(reg)) {
118 r = regulator_set_voltage(reg, 1800000, 1800000);
120 devm_regulator_put(reg);
121 DSSWARN("can't set the regulator voltage\n");
131 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
135 r = regulator_enable(hdmi.vdda_reg);
139 r = hdmi_runtime_get();
141 goto err_runtime_get;
143 /* Make selection of HDMI in DSS */
144 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
146 hdmi.core_enabled = true;
151 regulator_disable(hdmi.vdda_reg);
156 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
158 hdmi.core_enabled = false;
161 regulator_disable(hdmi.vdda_reg);
164 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
167 struct omap_video_timings *p;
168 struct omap_overlay_manager *mgr = hdmi.output.manager;
169 struct hdmi_wp_data *wp = &hdmi.wp;
170 struct dss_pll_clock_info hdmi_cinfo = { 0 };
172 r = hdmi_power_on_core(dssdev);
176 /* disable and clear irqs */
177 hdmi_wp_clear_irqenable(wp, 0xffffffff);
178 hdmi_wp_set_irqstatus(wp, 0xffffffff);
180 p = &hdmi.cfg.timings;
182 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
184 hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
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);
211 /* bypass TV gamma table */
212 dispc_enable_gamma_table(0);
215 dss_mgr_set_timings(mgr, p);
217 r = hdmi_wp_video_start(&hdmi.wp);
221 r = dss_mgr_enable(mgr);
225 hdmi_wp_set_irqenable(wp,
226 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
231 hdmi_wp_video_stop(&hdmi.wp);
233 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
237 dss_pll_disable(&hdmi.pll.pll);
239 hdmi_power_off_core(dssdev);
243 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
245 struct omap_overlay_manager *mgr = hdmi.output.manager;
247 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
249 dss_mgr_disable(mgr);
251 hdmi_wp_video_stop(&hdmi.wp);
253 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
255 dss_pll_disable(&hdmi.pll.pll);
257 hdmi_power_off_core(dssdev);
260 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
261 struct omap_video_timings *timings)
263 struct omap_dss_device *out = &hdmi.output;
265 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
271 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
272 struct omap_video_timings *timings)
274 mutex_lock(&hdmi.lock);
276 hdmi.cfg.timings = *timings;
278 dispc_set_tv_pclk(timings->pixelclock);
280 mutex_unlock(&hdmi.lock);
283 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
284 struct omap_video_timings *timings)
286 *timings = hdmi.cfg.timings;
289 static void hdmi_dump_regs(struct seq_file *s)
291 mutex_lock(&hdmi.lock);
293 if (hdmi_runtime_get()) {
294 mutex_unlock(&hdmi.lock);
298 hdmi_wp_dump(&hdmi.wp, s);
299 hdmi_pll_dump(&hdmi.pll, s);
300 hdmi_phy_dump(&hdmi.phy, s);
301 hdmi4_core_dump(&hdmi.core, s);
304 mutex_unlock(&hdmi.lock);
307 static int read_edid(u8 *buf, int len)
311 mutex_lock(&hdmi.lock);
313 r = hdmi_runtime_get();
316 r = hdmi4_read_edid(&hdmi.core, buf, len);
319 mutex_unlock(&hdmi.lock);
324 static int hdmi_display_enable(struct omap_dss_device *dssdev)
326 struct omap_dss_device *out = &hdmi.output;
329 DSSDBG("ENTER hdmi_display_enable\n");
331 mutex_lock(&hdmi.lock);
333 if (out == NULL || out->manager == NULL) {
334 DSSERR("failed to enable display: no output/manager\n");
339 r = hdmi_power_on_full(dssdev);
341 DSSERR("failed to power on device\n");
345 hdmi.display_enabled = true;
347 mutex_unlock(&hdmi.lock);
351 mutex_unlock(&hdmi.lock);
355 static void hdmi_display_disable(struct omap_dss_device *dssdev)
357 DSSDBG("Enter hdmi_display_disable\n");
359 mutex_lock(&hdmi.lock);
361 if (hdmi.audio_pdev && hdmi.audio_abort_cb)
362 hdmi.audio_abort_cb(&hdmi.audio_pdev->dev);
364 hdmi_power_off_full(dssdev);
366 hdmi.display_enabled = false;
368 mutex_unlock(&hdmi.lock);
371 static int hdmi_core_enable(struct omap_dss_device *dssdev)
375 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
377 mutex_lock(&hdmi.lock);
379 r = hdmi_power_on_core(dssdev);
381 DSSERR("failed to power on device\n");
385 mutex_unlock(&hdmi.lock);
389 mutex_unlock(&hdmi.lock);
393 static void hdmi_core_disable(struct omap_dss_device *dssdev)
395 DSSDBG("Enter omapdss_hdmi_core_disable\n");
397 mutex_lock(&hdmi.lock);
399 hdmi_power_off_core(dssdev);
401 mutex_unlock(&hdmi.lock);
404 static int hdmi_connect(struct omap_dss_device *dssdev,
405 struct omap_dss_device *dst)
407 struct omap_overlay_manager *mgr;
410 r = hdmi_init_regulator();
414 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
418 r = dss_mgr_connect(mgr, dssdev);
422 r = omapdss_output_set_device(dssdev, dst);
424 DSSERR("failed to connect output to new device: %s\n",
426 dss_mgr_disconnect(mgr, dssdev);
433 static void hdmi_disconnect(struct omap_dss_device *dssdev,
434 struct omap_dss_device *dst)
436 WARN_ON(dst != dssdev->dst);
438 if (dst != dssdev->dst)
441 omapdss_output_unset_device(dssdev);
444 dss_mgr_disconnect(dssdev->manager, dssdev);
447 static int hdmi_read_edid(struct omap_dss_device *dssdev,
453 need_enable = hdmi.core_enabled == false;
456 r = hdmi_core_enable(dssdev);
461 r = read_edid(edid, len);
464 hdmi_core_disable(dssdev);
469 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
470 const struct hdmi_avi_infoframe *avi)
472 hdmi.cfg.infoframe = *avi;
476 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
479 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
483 static const struct omapdss_hdmi_ops hdmi_ops = {
484 .connect = hdmi_connect,
485 .disconnect = hdmi_disconnect,
487 .enable = hdmi_display_enable,
488 .disable = hdmi_display_disable,
490 .check_timings = hdmi_display_check_timing,
491 .set_timings = hdmi_display_set_timing,
492 .get_timings = hdmi_display_get_timings,
494 .read_edid = hdmi_read_edid,
495 .set_infoframe = hdmi_set_infoframe,
496 .set_hdmi_mode = hdmi_set_hdmi_mode,
499 static void hdmi_init_output(struct platform_device *pdev)
501 struct omap_dss_device *out = &hdmi.output;
503 out->dev = &pdev->dev;
504 out->id = OMAP_DSS_OUTPUT_HDMI;
505 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
506 out->name = "hdmi.0";
507 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
508 out->ops.hdmi = &hdmi_ops;
509 out->owner = THIS_MODULE;
511 omapdss_register_output(out);
514 static void hdmi_uninit_output(struct platform_device *pdev)
516 struct omap_dss_device *out = &hdmi.output;
518 omapdss_unregister_output(out);
521 static int hdmi_probe_of(struct platform_device *pdev)
523 struct device_node *node = pdev->dev.of_node;
524 struct device_node *ep;
527 ep = omapdss_of_get_first_endpoint(node);
531 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
543 /* Audio callbacks */
544 static int hdmi_audio_startup(struct device *dev,
545 void (*abort_cb)(struct device *dev))
547 struct omap_hdmi *hd = dev_get_drvdata(dev);
550 mutex_lock(&hd->lock);
552 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
557 hd->audio_abort_cb = abort_cb;
560 mutex_unlock(&hd->lock);
565 static int hdmi_audio_shutdown(struct device *dev)
567 struct omap_hdmi *hd = dev_get_drvdata(dev);
569 mutex_lock(&hd->lock);
570 hd->audio_abort_cb = NULL;
571 mutex_unlock(&hd->lock);
576 static int hdmi_audio_start(struct device *dev)
578 struct omap_hdmi *hd = dev_get_drvdata(dev);
580 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
581 WARN_ON(!hd->display_enabled);
583 hdmi_wp_audio_enable(&hd->wp, true);
584 hdmi4_audio_start(&hd->core, &hd->wp);
589 static void hdmi_audio_stop(struct device *dev)
591 struct omap_hdmi *hd = dev_get_drvdata(dev);
593 WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
594 WARN_ON(!hd->display_enabled);
596 hdmi4_audio_stop(&hd->core, &hd->wp);
597 hdmi_wp_audio_enable(&hd->wp, false);
600 static int hdmi_audio_config(struct device *dev,
601 struct omap_dss_audio *dss_audio)
603 struct omap_hdmi *hd = dev_get_drvdata(dev);
606 mutex_lock(&hd->lock);
608 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
613 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
614 hd->cfg.timings.pixelclock);
617 mutex_unlock(&hd->lock);
622 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
623 .audio_startup = hdmi_audio_startup,
624 .audio_shutdown = hdmi_audio_shutdown,
625 .audio_start = hdmi_audio_start,
626 .audio_stop = hdmi_audio_stop,
627 .audio_config = hdmi_audio_config,
630 static int hdmi_audio_register(struct device *dev)
632 struct omap_hdmi_audio_pdata pdata = {
634 .dss_version = omapdss_get_version(),
635 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
636 .ops = &hdmi_audio_ops,
639 hdmi.audio_pdev = platform_device_register_data(
640 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
641 &pdata, sizeof(pdata));
643 if (IS_ERR(hdmi.audio_pdev))
644 return PTR_ERR(hdmi.audio_pdev);
649 /* HDMI HW IP initialisation */
650 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
652 struct platform_device *pdev = to_platform_device(dev);
657 dev_set_drvdata(&pdev->dev, &hdmi);
659 mutex_init(&hdmi.lock);
661 if (pdev->dev.of_node) {
662 r = hdmi_probe_of(pdev);
667 r = hdmi_wp_init(pdev, &hdmi.wp);
671 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
675 r = hdmi_phy_init(pdev, &hdmi.phy);
679 r = hdmi4_core_init(pdev, &hdmi.core);
683 irq = platform_get_irq(pdev, 0);
685 DSSERR("platform_get_irq failed\n");
690 r = devm_request_threaded_irq(&pdev->dev, irq,
691 NULL, hdmi_irq_handler,
692 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
694 DSSERR("HDMI IRQ request failed\n");
698 pm_runtime_enable(&pdev->dev);
700 hdmi_init_output(pdev);
702 r = hdmi_audio_register(&pdev->dev);
704 DSSERR("Registering HDMI audio failed\n");
705 hdmi_uninit_output(pdev);
706 pm_runtime_disable(&pdev->dev);
710 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
714 hdmi_pll_uninit(&hdmi.pll);
718 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
720 struct platform_device *pdev = to_platform_device(dev);
723 platform_device_unregister(hdmi.audio_pdev);
725 hdmi_uninit_output(pdev);
727 hdmi_pll_uninit(&hdmi.pll);
729 pm_runtime_disable(&pdev->dev);
732 static const struct component_ops hdmi4_component_ops = {
734 .unbind = hdmi4_unbind,
737 static int hdmi4_probe(struct platform_device *pdev)
739 return component_add(&pdev->dev, &hdmi4_component_ops);
742 static int hdmi4_remove(struct platform_device *pdev)
744 component_del(&pdev->dev, &hdmi4_component_ops);
748 static int hdmi_runtime_suspend(struct device *dev)
755 static int hdmi_runtime_resume(struct device *dev)
759 r = dispc_runtime_get();
766 static const struct dev_pm_ops hdmi_pm_ops = {
767 .runtime_suspend = hdmi_runtime_suspend,
768 .runtime_resume = hdmi_runtime_resume,
771 static const struct of_device_id hdmi_of_match[] = {
772 { .compatible = "ti,omap4-hdmi", },
776 static struct platform_driver omapdss_hdmihw_driver = {
777 .probe = hdmi4_probe,
778 .remove = hdmi4_remove,
780 .name = "omapdss_hdmi",
782 .of_match_table = hdmi_of_match,
783 .suppress_bind_attrs = true,
787 int __init hdmi4_init_platform_driver(void)
789 return platform_driver_register(&omapdss_hdmihw_driver);
792 void hdmi4_uninit_platform_driver(void)
794 platform_driver_unregister(&omapdss_hdmihw_driver);