1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2014 The Linux Foundation. All rights reserved.
4 * Copyright (C) 2013 Red Hat
5 * Author: Rob Clark <robdclark@gmail.com>
6 */
7
8 #include <linux/of_irq.h>
9 #include <linux/of_gpio.h>
10 #include <linux/of_platform.h>
11 #include <linux/platform_device.h>
12
13 #include <drm/drm_bridge_connector.h>
14 #include <drm/drm_of.h>
15
16 #include <sound/hdmi-codec.h>
17 #include "hdmi.h"
18
msm_hdmi_set_mode(struct hdmi * hdmi,bool power_on)19 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on)
20 {
21 uint32_t ctrl = 0;
22 unsigned long flags;
23
24 spin_lock_irqsave(&hdmi->reg_lock, flags);
25 if (power_on) {
26 ctrl |= HDMI_CTRL_ENABLE;
27 if (!hdmi->hdmi_mode) {
28 ctrl |= HDMI_CTRL_HDMI;
29 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
30 ctrl &= ~HDMI_CTRL_HDMI;
31 } else {
32 ctrl |= HDMI_CTRL_HDMI;
33 }
34 } else {
35 ctrl = HDMI_CTRL_HDMI;
36 }
37
38 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
39 spin_unlock_irqrestore(&hdmi->reg_lock, flags);
40 DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
41 power_on ? "Enable" : "Disable", ctrl);
42 }
43
msm_hdmi_irq(int irq,void * dev_id)44 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id)
45 {
46 struct hdmi *hdmi = dev_id;
47
48 /* Process HPD: */
49 msm_hdmi_hpd_irq(hdmi->bridge);
50
51 /* Process DDC: */
52 msm_hdmi_i2c_irq(hdmi->i2c);
53
54 /* Process HDCP: */
55 if (hdmi->hdcp_ctrl)
56 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl);
57
58 /* TODO audio.. */
59
60 return IRQ_HANDLED;
61 }
62
msm_hdmi_destroy(struct hdmi * hdmi)63 static void msm_hdmi_destroy(struct hdmi *hdmi)
64 {
65 /*
66 * at this point, hpd has been disabled,
67 * after flush workq, it's safe to deinit hdcp
68 */
69 if (hdmi->workq)
70 destroy_workqueue(hdmi->workq);
71 msm_hdmi_hdcp_destroy(hdmi);
72
73 if (hdmi->i2c)
74 msm_hdmi_i2c_destroy(hdmi->i2c);
75 }
76
msm_hdmi_put_phy(struct hdmi * hdmi)77 static void msm_hdmi_put_phy(struct hdmi *hdmi)
78 {
79 if (hdmi->phy_dev) {
80 put_device(hdmi->phy_dev);
81 hdmi->phy = NULL;
82 hdmi->phy_dev = NULL;
83 }
84 }
85
msm_hdmi_get_phy(struct hdmi * hdmi)86 static int msm_hdmi_get_phy(struct hdmi *hdmi)
87 {
88 struct platform_device *pdev = hdmi->pdev;
89 struct platform_device *phy_pdev;
90 struct device_node *phy_node;
91
92 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
93 if (!phy_node) {
94 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
95 return -ENXIO;
96 }
97
98 phy_pdev = of_find_device_by_node(phy_node);
99 of_node_put(phy_node);
100
101 if (!phy_pdev)
102 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n");
103
104 hdmi->phy = platform_get_drvdata(phy_pdev);
105 if (!hdmi->phy) {
106 put_device(&phy_pdev->dev);
107 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n");
108 }
109
110 hdmi->phy_dev = &phy_pdev->dev;
111
112 return 0;
113 }
114
115 /* construct hdmi at bind/probe time, grab all the resources. If
116 * we are to EPROBE_DEFER we want to do it here, rather than later
117 * at modeset_init() time
118 */
msm_hdmi_init(struct hdmi * hdmi)119 static int msm_hdmi_init(struct hdmi *hdmi)
120 {
121 struct platform_device *pdev = hdmi->pdev;
122 int ret;
123
124 hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
125 if (!hdmi->workq) {
126 ret = -ENOMEM;
127 goto fail;
128 }
129
130 hdmi->i2c = msm_hdmi_i2c_init(hdmi);
131 if (IS_ERR(hdmi->i2c)) {
132 ret = PTR_ERR(hdmi->i2c);
133 DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret);
134 hdmi->i2c = NULL;
135 goto fail;
136 }
137
138 hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi);
139 if (IS_ERR(hdmi->hdcp_ctrl)) {
140 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
141 hdmi->hdcp_ctrl = NULL;
142 }
143
144 return 0;
145
146 fail:
147 msm_hdmi_destroy(hdmi);
148
149 return ret;
150 }
151
152 /* Second part of initialization, the drm/kms level modeset_init,
153 * constructs/initializes mode objects, etc, is called from master
154 * driver (not hdmi sub-device's probe/bind!)
155 *
156 * Any resource (regulator/clk/etc) which could be missing at boot
157 * should be handled in msm_hdmi_init() so that failure happens from
158 * hdmi sub-device's probe.
159 */
msm_hdmi_modeset_init(struct hdmi * hdmi,struct drm_device * dev,struct drm_encoder * encoder)160 int msm_hdmi_modeset_init(struct hdmi *hdmi,
161 struct drm_device *dev, struct drm_encoder *encoder)
162 {
163 struct msm_drm_private *priv = dev->dev_private;
164 int ret;
165
166 if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) {
167 DRM_DEV_ERROR(dev->dev, "too many bridges\n");
168 return -ENOSPC;
169 }
170
171 hdmi->dev = dev;
172 hdmi->encoder = encoder;
173
174 hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
175
176 hdmi->bridge = msm_hdmi_bridge_init(hdmi);
177 if (IS_ERR(hdmi->bridge)) {
178 ret = PTR_ERR(hdmi->bridge);
179 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret);
180 hdmi->bridge = NULL;
181 goto fail;
182 }
183
184 if (hdmi->next_bridge) {
185 ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge,
186 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
187 if (ret) {
188 DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret);
189 goto fail;
190 }
191 }
192
193 hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder);
194 if (IS_ERR(hdmi->connector)) {
195 ret = PTR_ERR(hdmi->connector);
196 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret);
197 hdmi->connector = NULL;
198 goto fail;
199 }
200
201 drm_connector_attach_encoder(hdmi->connector, hdmi->encoder);
202
203 ret = devm_request_irq(dev->dev, hdmi->irq,
204 msm_hdmi_irq, IRQF_TRIGGER_HIGH,
205 "hdmi_isr", hdmi);
206 if (ret < 0) {
207 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n",
208 hdmi->irq, ret);
209 goto fail;
210 }
211
212 ret = msm_hdmi_hpd_enable(hdmi->bridge);
213 if (ret < 0) {
214 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
215 goto fail;
216 }
217
218 priv->bridges[priv->num_bridges++] = hdmi->bridge;
219
220 return 0;
221
222 fail:
223 /* bridge is normally destroyed by drm: */
224 if (hdmi->bridge) {
225 msm_hdmi_bridge_destroy(hdmi->bridge);
226 hdmi->bridge = NULL;
227 }
228 if (hdmi->connector) {
229 hdmi->connector->funcs->destroy(hdmi->connector);
230 hdmi->connector = NULL;
231 }
232
233 return ret;
234 }
235
236 /*
237 * The hdmi device:
238 */
239
240 #define HDMI_CFG(item, entry) \
241 .item ## _names = item ##_names_ ## entry, \
242 .item ## _cnt = ARRAY_SIZE(item ## _names_ ## entry)
243
244 static const char *hpd_reg_names_8960[] = {"core-vdda"};
245 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"};
246
247 static const struct hdmi_platform_config hdmi_tx_8960_config = {
248 HDMI_CFG(hpd_reg, 8960),
249 HDMI_CFG(hpd_clk, 8960),
250 };
251
252 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
253 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"};
254 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"};
255 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
256
257 static const struct hdmi_platform_config hdmi_tx_8974_config = {
258 HDMI_CFG(pwr_reg, 8x74),
259 HDMI_CFG(pwr_clk, 8x74),
260 HDMI_CFG(hpd_clk, 8x74),
261 .hpd_freq = hpd_clk_freq_8x74,
262 };
263
264 /*
265 * HDMI audio codec callbacks
266 */
msm_hdmi_audio_hw_params(struct device * dev,void * data,struct hdmi_codec_daifmt * daifmt,struct hdmi_codec_params * params)267 static int msm_hdmi_audio_hw_params(struct device *dev, void *data,
268 struct hdmi_codec_daifmt *daifmt,
269 struct hdmi_codec_params *params)
270 {
271 struct hdmi *hdmi = dev_get_drvdata(dev);
272 unsigned int chan;
273 unsigned int channel_allocation = 0;
274 unsigned int rate;
275 unsigned int level_shift = 0; /* 0dB */
276 bool down_mix = false;
277
278 DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate,
279 params->sample_width, params->cea.channels);
280
281 switch (params->cea.channels) {
282 case 2:
283 /* FR and FL speakers */
284 channel_allocation = 0;
285 chan = MSM_HDMI_AUDIO_CHANNEL_2;
286 break;
287 case 4:
288 /* FC, LFE, FR and FL speakers */
289 channel_allocation = 0x3;
290 chan = MSM_HDMI_AUDIO_CHANNEL_4;
291 break;
292 case 6:
293 /* RR, RL, FC, LFE, FR and FL speakers */
294 channel_allocation = 0x0B;
295 chan = MSM_HDMI_AUDIO_CHANNEL_6;
296 break;
297 case 8:
298 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */
299 channel_allocation = 0x1F;
300 chan = MSM_HDMI_AUDIO_CHANNEL_8;
301 break;
302 default:
303 return -EINVAL;
304 }
305
306 switch (params->sample_rate) {
307 case 32000:
308 rate = HDMI_SAMPLE_RATE_32KHZ;
309 break;
310 case 44100:
311 rate = HDMI_SAMPLE_RATE_44_1KHZ;
312 break;
313 case 48000:
314 rate = HDMI_SAMPLE_RATE_48KHZ;
315 break;
316 case 88200:
317 rate = HDMI_SAMPLE_RATE_88_2KHZ;
318 break;
319 case 96000:
320 rate = HDMI_SAMPLE_RATE_96KHZ;
321 break;
322 case 176400:
323 rate = HDMI_SAMPLE_RATE_176_4KHZ;
324 break;
325 case 192000:
326 rate = HDMI_SAMPLE_RATE_192KHZ;
327 break;
328 default:
329 DRM_DEV_ERROR(dev, "rate[%d] not supported!\n",
330 params->sample_rate);
331 return -EINVAL;
332 }
333
334 msm_hdmi_audio_set_sample_rate(hdmi, rate);
335 msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation,
336 level_shift, down_mix);
337
338 return 0;
339 }
340
msm_hdmi_audio_shutdown(struct device * dev,void * data)341 static void msm_hdmi_audio_shutdown(struct device *dev, void *data)
342 {
343 struct hdmi *hdmi = dev_get_drvdata(dev);
344
345 msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0);
346 }
347
348 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = {
349 .hw_params = msm_hdmi_audio_hw_params,
350 .audio_shutdown = msm_hdmi_audio_shutdown,
351 };
352
353 static struct hdmi_codec_pdata codec_data = {
354 .ops = &msm_hdmi_audio_codec_ops,
355 .max_i2s_channels = 8,
356 .i2s = 1,
357 };
358
msm_hdmi_register_audio_driver(struct hdmi * hdmi,struct device * dev)359 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev)
360 {
361 hdmi->audio_pdev = platform_device_register_data(dev,
362 HDMI_CODEC_DRV_NAME,
363 PLATFORM_DEVID_AUTO,
364 &codec_data,
365 sizeof(codec_data));
366 return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
367 }
368
msm_hdmi_bind(struct device * dev,struct device * master,void * data)369 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data)
370 {
371 struct msm_drm_private *priv = dev_get_drvdata(master);
372 struct hdmi *hdmi = dev_get_drvdata(dev);
373 int err;
374
375 err = msm_hdmi_init(hdmi);
376 if (err)
377 return err;
378 priv->hdmi = hdmi;
379
380 err = msm_hdmi_register_audio_driver(hdmi, dev);
381 if (err) {
382 DRM_ERROR("Failed to attach an audio codec %d\n", err);
383 hdmi->audio_pdev = NULL;
384 }
385
386 return 0;
387 }
388
msm_hdmi_unbind(struct device * dev,struct device * master,void * data)389 static void msm_hdmi_unbind(struct device *dev, struct device *master,
390 void *data)
391 {
392 struct msm_drm_private *priv = dev_get_drvdata(master);
393
394 if (priv->hdmi) {
395 if (priv->hdmi->audio_pdev)
396 platform_device_unregister(priv->hdmi->audio_pdev);
397
398 msm_hdmi_destroy(priv->hdmi);
399 priv->hdmi = NULL;
400 }
401 }
402
403 static const struct component_ops msm_hdmi_ops = {
404 .bind = msm_hdmi_bind,
405 .unbind = msm_hdmi_unbind,
406 };
407
msm_hdmi_dev_probe(struct platform_device * pdev)408 static int msm_hdmi_dev_probe(struct platform_device *pdev)
409 {
410 const struct hdmi_platform_config *config;
411 struct device *dev = &pdev->dev;
412 struct hdmi *hdmi;
413 struct resource *res;
414 int i, ret;
415
416 config = of_device_get_match_data(dev);
417 if (!config)
418 return -EINVAL;
419
420 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
421 if (!hdmi)
422 return -ENOMEM;
423
424 hdmi->pdev = pdev;
425 hdmi->config = config;
426 spin_lock_init(&hdmi->reg_lock);
427
428 ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge);
429 if (ret && ret != -ENODEV)
430 return ret;
431
432 hdmi->mmio = msm_ioremap(pdev, "core_physical");
433 if (IS_ERR(hdmi->mmio))
434 return PTR_ERR(hdmi->mmio);
435
436 /* HDCP needs physical address of hdmi register */
437 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
438 "core_physical");
439 if (!res)
440 return -EINVAL;
441 hdmi->mmio_phy_addr = res->start;
442
443 hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical");
444 if (IS_ERR(hdmi->qfprom_mmio)) {
445 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n");
446 hdmi->qfprom_mmio = NULL;
447 }
448
449 hdmi->irq = platform_get_irq(pdev, 0);
450 if (hdmi->irq < 0)
451 return hdmi->irq;
452
453 hdmi->hpd_regs = devm_kcalloc(&pdev->dev,
454 config->hpd_reg_cnt,
455 sizeof(hdmi->hpd_regs[0]),
456 GFP_KERNEL);
457 if (!hdmi->hpd_regs)
458 return -ENOMEM;
459
460 for (i = 0; i < config->hpd_reg_cnt; i++)
461 hdmi->hpd_regs[i].supply = config->hpd_reg_names[i];
462
463 ret = devm_regulator_bulk_get(&pdev->dev, config->hpd_reg_cnt, hdmi->hpd_regs);
464 if (ret)
465 return dev_err_probe(dev, ret, "failed to get hpd regulators\n");
466
467 hdmi->pwr_regs = devm_kcalloc(&pdev->dev,
468 config->pwr_reg_cnt,
469 sizeof(hdmi->pwr_regs[0]),
470 GFP_KERNEL);
471 if (!hdmi->pwr_regs)
472 return -ENOMEM;
473
474 for (i = 0; i < config->pwr_reg_cnt; i++)
475 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i];
476
477 ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs);
478 if (ret)
479 return dev_err_probe(dev, ret, "failed to get pwr regulators\n");
480
481 hdmi->hpd_clks = devm_kcalloc(&pdev->dev,
482 config->hpd_clk_cnt,
483 sizeof(hdmi->hpd_clks[0]),
484 GFP_KERNEL);
485 if (!hdmi->hpd_clks)
486 return -ENOMEM;
487
488 for (i = 0; i < config->hpd_clk_cnt; i++) {
489 struct clk *clk;
490
491 clk = msm_clk_get(pdev, config->hpd_clk_names[i]);
492 if (IS_ERR(clk))
493 return dev_err_probe(dev, PTR_ERR(clk),
494 "failed to get hpd clk: %s\n",
495 config->hpd_clk_names[i]);
496
497 hdmi->hpd_clks[i] = clk;
498 }
499
500 hdmi->pwr_clks = devm_kcalloc(&pdev->dev,
501 config->pwr_clk_cnt,
502 sizeof(hdmi->pwr_clks[0]),
503 GFP_KERNEL);
504 if (!hdmi->pwr_clks)
505 return -ENOMEM;
506
507 for (i = 0; i < config->pwr_clk_cnt; i++) {
508 struct clk *clk;
509
510 clk = msm_clk_get(pdev, config->pwr_clk_names[i]);
511 if (IS_ERR(clk))
512 return dev_err_probe(dev, PTR_ERR(clk),
513 "failed to get pwr clk: %s\n",
514 config->pwr_clk_names[i]);
515
516 hdmi->pwr_clks[i] = clk;
517 }
518
519 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
520 /* This will catch e.g. -EPROBE_DEFER */
521 if (IS_ERR(hdmi->hpd_gpiod))
522 return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod),
523 "failed to get hpd gpio\n");
524
525 if (!hdmi->hpd_gpiod)
526 DBG("failed to get HPD gpio");
527
528 if (hdmi->hpd_gpiod)
529 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD");
530
531 ret = msm_hdmi_get_phy(hdmi);
532 if (ret) {
533 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n");
534 return ret;
535 }
536
537 ret = devm_pm_runtime_enable(&pdev->dev);
538 if (ret)
539 goto err_put_phy;
540
541 platform_set_drvdata(pdev, hdmi);
542
543 ret = component_add(&pdev->dev, &msm_hdmi_ops);
544 if (ret)
545 goto err_put_phy;
546
547 return 0;
548
549 err_put_phy:
550 msm_hdmi_put_phy(hdmi);
551 return ret;
552 }
553
msm_hdmi_dev_remove(struct platform_device * pdev)554 static int msm_hdmi_dev_remove(struct platform_device *pdev)
555 {
556 struct hdmi *hdmi = dev_get_drvdata(&pdev->dev);
557
558 component_del(&pdev->dev, &msm_hdmi_ops);
559
560 msm_hdmi_put_phy(hdmi);
561
562 return 0;
563 }
564
565 static const struct of_device_id msm_hdmi_dt_match[] = {
566 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config },
567 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config },
568 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config },
569 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config },
570 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
571 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config },
572 {}
573 };
574
575 static struct platform_driver msm_hdmi_driver = {
576 .probe = msm_hdmi_dev_probe,
577 .remove = msm_hdmi_dev_remove,
578 .driver = {
579 .name = "hdmi_msm",
580 .of_match_table = msm_hdmi_dt_match,
581 },
582 };
583
msm_hdmi_register(void)584 void __init msm_hdmi_register(void)
585 {
586 msm_hdmi_phy_driver_register();
587 platform_driver_register(&msm_hdmi_driver);
588 }
589
msm_hdmi_unregister(void)590 void __exit msm_hdmi_unregister(void)
591 {
592 platform_driver_unregister(&msm_hdmi_driver);
593 msm_hdmi_phy_driver_unregister();
594 }
595