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 <video/omapdss.h>
37 #include "hdmi4_core.h"
39 #include "dss_features.h"
43 struct platform_device *pdev;
45 struct hdmi_wp_data wp;
46 struct hdmi_pll_data pll;
47 struct hdmi_phy_data phy;
48 struct hdmi_core_data core;
50 struct hdmi_config cfg;
53 struct regulator *vdda_hdmi_dac_reg;
57 struct omap_dss_device output;
60 static int hdmi_runtime_get(void)
64 DSSDBG("hdmi_runtime_get\n");
66 r = pm_runtime_get_sync(&hdmi.pdev->dev);
74 static void hdmi_runtime_put(void)
78 DSSDBG("hdmi_runtime_put\n");
80 r = pm_runtime_put_sync(&hdmi.pdev->dev);
81 WARN_ON(r < 0 && r != -ENOSYS);
84 static int hdmi_init_regulator(void)
86 struct regulator *reg;
88 if (hdmi.vdda_hdmi_dac_reg != NULL)
91 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
94 if (PTR_ERR(reg) != -EPROBE_DEFER)
95 DSSERR("can't get VDDA regulator\n");
99 hdmi.vdda_hdmi_dac_reg = reg;
104 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
108 r = regulator_enable(hdmi.vdda_hdmi_dac_reg);
112 r = hdmi_runtime_get();
114 goto err_runtime_get;
116 /* Make selection of HDMI in DSS */
117 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
119 hdmi.core_enabled = true;
124 regulator_disable(hdmi.vdda_hdmi_dac_reg);
129 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
131 hdmi.core_enabled = false;
134 regulator_disable(hdmi.vdda_hdmi_dac_reg);
137 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
140 struct omap_video_timings *p;
141 struct omap_overlay_manager *mgr = hdmi.output.manager;
144 r = hdmi_power_on_core(dssdev);
148 p = &hdmi.cfg.timings;
150 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
152 /* the functions below use kHz pixel clock. TODO: change to Hz */
153 phy = p->pixelclock / 1000;
155 hdmi_pll_compute(&hdmi.pll, clk_get_rate(hdmi.sys_clk), phy);
157 /* config the PLL and PHY hdmi_set_pll_pwrfirst */
158 r = hdmi_pll_enable(&hdmi.pll, &hdmi.wp);
160 DSSDBG("Failed to lock PLL\n");
164 r = hdmi_phy_enable(&hdmi.phy, &hdmi.wp, &hdmi.cfg);
166 DSSDBG("Failed to start PHY\n");
170 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
172 /* bypass TV gamma table */
173 dispc_enable_gamma_table(0);
176 dss_mgr_set_timings(mgr, p);
178 r = hdmi_wp_video_start(&hdmi.wp);
182 r = dss_mgr_enable(mgr);
189 hdmi_wp_video_stop(&hdmi.wp);
191 hdmi_phy_disable(&hdmi.phy, &hdmi.wp);
193 hdmi_pll_disable(&hdmi.pll, &hdmi.wp);
195 hdmi_power_off_core(dssdev);
199 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
201 struct omap_overlay_manager *mgr = hdmi.output.manager;
203 dss_mgr_disable(mgr);
205 hdmi_wp_video_stop(&hdmi.wp);
206 hdmi_phy_disable(&hdmi.phy, &hdmi.wp);
207 hdmi_pll_disable(&hdmi.pll, &hdmi.wp);
209 hdmi_power_off_core(dssdev);
212 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
213 struct omap_video_timings *timings)
215 struct omap_dss_device *out = &hdmi.output;
217 if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
223 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
224 struct omap_video_timings *timings)
227 const struct hdmi_config *t;
229 mutex_lock(&hdmi.lock);
231 cm = hdmi_get_code(timings);
234 t = hdmi_get_timings(cm.mode, cm.code);
238 dispc_set_tv_pclk(t->timings.pixelclock);
240 hdmi.cfg.timings = *timings;
241 hdmi.cfg.cm.code = 0;
242 hdmi.cfg.cm.mode = HDMI_DVI;
244 dispc_set_tv_pclk(timings->pixelclock);
247 DSSDBG("using mode: %s, code %d\n", hdmi.cfg.cm.mode == HDMI_DVI ?
248 "DVI" : "HDMI", hdmi.cfg.cm.code);
250 mutex_unlock(&hdmi.lock);
253 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
254 struct omap_video_timings *timings)
256 const struct hdmi_config *cfg;
257 struct hdmi_cm cm = hdmi.cfg.cm;
259 cfg = hdmi_get_timings(cm.mode, cm.code);
261 cfg = hdmi_default_timing();
263 memcpy(timings, &cfg->timings, sizeof(cfg->timings));
266 static void hdmi_dump_regs(struct seq_file *s)
268 mutex_lock(&hdmi.lock);
270 if (hdmi_runtime_get()) {
271 mutex_unlock(&hdmi.lock);
275 hdmi_wp_dump(&hdmi.wp, s);
276 hdmi_pll_dump(&hdmi.pll, s);
277 hdmi_phy_dump(&hdmi.phy, s);
278 hdmi4_core_dump(&hdmi.core, s);
281 mutex_unlock(&hdmi.lock);
284 static int read_edid(u8 *buf, int len)
288 mutex_lock(&hdmi.lock);
290 r = hdmi_runtime_get();
293 r = hdmi4_read_edid(&hdmi.core, buf, len);
296 mutex_unlock(&hdmi.lock);
301 static int hdmi_display_enable(struct omap_dss_device *dssdev)
303 struct omap_dss_device *out = &hdmi.output;
306 DSSDBG("ENTER hdmi_display_enable\n");
308 mutex_lock(&hdmi.lock);
310 if (out == NULL || out->manager == NULL) {
311 DSSERR("failed to enable display: no output/manager\n");
316 r = hdmi_power_on_full(dssdev);
318 DSSERR("failed to power on device\n");
322 mutex_unlock(&hdmi.lock);
326 mutex_unlock(&hdmi.lock);
330 static void hdmi_display_disable(struct omap_dss_device *dssdev)
332 DSSDBG("Enter hdmi_display_disable\n");
334 mutex_lock(&hdmi.lock);
336 hdmi_power_off_full(dssdev);
338 mutex_unlock(&hdmi.lock);
341 static int hdmi_core_enable(struct omap_dss_device *dssdev)
345 DSSDBG("ENTER omapdss_hdmi_core_enable\n");
347 mutex_lock(&hdmi.lock);
349 r = hdmi_power_on_core(dssdev);
351 DSSERR("failed to power on device\n");
355 mutex_unlock(&hdmi.lock);
359 mutex_unlock(&hdmi.lock);
363 static void hdmi_core_disable(struct omap_dss_device *dssdev)
365 DSSDBG("Enter omapdss_hdmi_core_disable\n");
367 mutex_lock(&hdmi.lock);
369 hdmi_power_off_core(dssdev);
371 mutex_unlock(&hdmi.lock);
374 static int hdmi_get_clocks(struct platform_device *pdev)
378 clk = devm_clk_get(&pdev->dev, "sys_clk");
380 DSSERR("can't get sys_clk\n");
389 static int hdmi_connect(struct omap_dss_device *dssdev,
390 struct omap_dss_device *dst)
392 struct omap_overlay_manager *mgr;
395 r = hdmi_init_regulator();
399 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
403 r = dss_mgr_connect(mgr, dssdev);
407 r = omapdss_output_set_device(dssdev, dst);
409 DSSERR("failed to connect output to new device: %s\n",
411 dss_mgr_disconnect(mgr, dssdev);
418 static void hdmi_disconnect(struct omap_dss_device *dssdev,
419 struct omap_dss_device *dst)
421 WARN_ON(dst != dssdev->dst);
423 if (dst != dssdev->dst)
426 omapdss_output_unset_device(dssdev);
429 dss_mgr_disconnect(dssdev->manager, dssdev);
432 static int hdmi_read_edid(struct omap_dss_device *dssdev,
438 need_enable = hdmi.core_enabled == false;
441 r = hdmi_core_enable(dssdev);
446 r = read_edid(edid, len);
449 hdmi_core_disable(dssdev);
454 #if defined(CONFIG_OMAP4_DSS_HDMI_AUDIO)
455 static int hdmi_audio_enable(struct omap_dss_device *dssdev)
459 mutex_lock(&hdmi.lock);
461 if (!hdmi_mode_has_audio(hdmi.cfg.cm.mode)) {
466 r = hdmi_wp_audio_enable(&hdmi.wp, true);
470 mutex_unlock(&hdmi.lock);
474 mutex_unlock(&hdmi.lock);
478 static void hdmi_audio_disable(struct omap_dss_device *dssdev)
480 hdmi_wp_audio_enable(&hdmi.wp, false);
483 static int hdmi_audio_start(struct omap_dss_device *dssdev)
485 return hdmi4_audio_start(&hdmi.core, &hdmi.wp);
488 static void hdmi_audio_stop(struct omap_dss_device *dssdev)
490 hdmi4_audio_stop(&hdmi.core, &hdmi.wp);
493 static bool hdmi_audio_supported(struct omap_dss_device *dssdev)
497 mutex_lock(&hdmi.lock);
499 r = hdmi_mode_has_audio(hdmi.cfg.cm.mode);
501 mutex_unlock(&hdmi.lock);
505 static int hdmi_audio_config(struct omap_dss_device *dssdev,
506 struct omap_dss_audio *audio)
509 u32 pclk = hdmi.cfg.timings.pixelclock;
511 mutex_lock(&hdmi.lock);
513 if (!hdmi_mode_has_audio(hdmi.cfg.cm.mode)) {
518 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, audio, pclk);
522 mutex_unlock(&hdmi.lock);
526 mutex_unlock(&hdmi.lock);
530 static int hdmi_audio_enable(struct omap_dss_device *dssdev)
535 static void hdmi_audio_disable(struct omap_dss_device *dssdev)
539 static int hdmi_audio_start(struct omap_dss_device *dssdev)
544 static void hdmi_audio_stop(struct omap_dss_device *dssdev)
548 static bool hdmi_audio_supported(struct omap_dss_device *dssdev)
553 static int hdmi_audio_config(struct omap_dss_device *dssdev,
554 struct omap_dss_audio *audio)
560 static const struct omapdss_hdmi_ops hdmi_ops = {
561 .connect = hdmi_connect,
562 .disconnect = hdmi_disconnect,
564 .enable = hdmi_display_enable,
565 .disable = hdmi_display_disable,
567 .check_timings = hdmi_display_check_timing,
568 .set_timings = hdmi_display_set_timing,
569 .get_timings = hdmi_display_get_timings,
571 .read_edid = hdmi_read_edid,
573 .audio_enable = hdmi_audio_enable,
574 .audio_disable = hdmi_audio_disable,
575 .audio_start = hdmi_audio_start,
576 .audio_stop = hdmi_audio_stop,
577 .audio_supported = hdmi_audio_supported,
578 .audio_config = hdmi_audio_config,
581 static void hdmi_init_output(struct platform_device *pdev)
583 struct omap_dss_device *out = &hdmi.output;
585 out->dev = &pdev->dev;
586 out->id = OMAP_DSS_OUTPUT_HDMI;
587 out->output_type = OMAP_DISPLAY_TYPE_HDMI;
588 out->name = "hdmi.0";
589 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
590 out->ops.hdmi = &hdmi_ops;
591 out->owner = THIS_MODULE;
593 omapdss_register_output(out);
596 static void __exit hdmi_uninit_output(struct platform_device *pdev)
598 struct omap_dss_device *out = &hdmi.output;
600 omapdss_unregister_output(out);
603 /* HDMI HW IP initialisation */
604 static int omapdss_hdmihw_probe(struct platform_device *pdev)
610 mutex_init(&hdmi.lock);
612 r = hdmi_wp_init(pdev, &hdmi.wp);
616 r = hdmi_pll_init(pdev, &hdmi.pll);
620 r = hdmi_phy_init(pdev, &hdmi.phy);
624 r = hdmi4_core_init(pdev, &hdmi.core);
628 r = hdmi_get_clocks(pdev);
630 DSSERR("can't get clocks\n");
634 pm_runtime_enable(&pdev->dev);
636 hdmi_init_output(pdev);
638 dss_debugfs_create_file("hdmi", hdmi_dump_regs);
643 static int __exit omapdss_hdmihw_remove(struct platform_device *pdev)
645 hdmi_uninit_output(pdev);
647 pm_runtime_disable(&pdev->dev);
652 static int hdmi_runtime_suspend(struct device *dev)
654 clk_disable_unprepare(hdmi.sys_clk);
661 static int hdmi_runtime_resume(struct device *dev)
665 r = dispc_runtime_get();
669 clk_prepare_enable(hdmi.sys_clk);
674 static const struct dev_pm_ops hdmi_pm_ops = {
675 .runtime_suspend = hdmi_runtime_suspend,
676 .runtime_resume = hdmi_runtime_resume,
679 static const struct of_device_id hdmi_of_match[] = {
680 { .compatible = "ti,omap4-hdmi", },
684 static struct platform_driver omapdss_hdmihw_driver = {
685 .probe = omapdss_hdmihw_probe,
686 .remove = __exit_p(omapdss_hdmihw_remove),
688 .name = "omapdss_hdmi",
689 .owner = THIS_MODULE,
691 .of_match_table = hdmi_of_match,
695 int __init hdmi4_init_platform_driver(void)
697 return platform_driver_register(&omapdss_hdmihw_driver);
700 void __exit hdmi4_uninit_platform_driver(void)
702 platform_driver_unregister(&omapdss_hdmihw_driver);