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/gpio/consumer.h>
9 #include <linux/of_irq.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 int ret;
164
165 hdmi->dev = dev;
166 hdmi->encoder = encoder;
167
168 hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
169
170 ret = msm_hdmi_bridge_init(hdmi);
171 if (ret) {
172 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret);
173 goto fail;
174 }
175
176 if (hdmi->next_bridge) {
177 ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge,
178 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
179 if (ret) {
180 DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret);
181 goto fail;
182 }
183 }
184
185 hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder);
186 if (IS_ERR(hdmi->connector)) {
187 ret = PTR_ERR(hdmi->connector);
188 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret);
189 hdmi->connector = NULL;
190 goto fail;
191 }
192
193 drm_connector_attach_encoder(hdmi->connector, hdmi->encoder);
194
195 ret = devm_request_irq(dev->dev, hdmi->irq,
196 msm_hdmi_irq, IRQF_TRIGGER_HIGH,
197 "hdmi_isr", hdmi);
198 if (ret < 0) {
199 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n",
200 hdmi->irq, ret);
201 goto fail;
202 }
203
204 ret = msm_hdmi_hpd_enable(hdmi->bridge);
205 if (ret < 0) {
206 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
207 goto fail;
208 }
209
210 return 0;
211
212 fail:
213 if (hdmi->connector) {
214 hdmi->connector->funcs->destroy(hdmi->connector);
215 hdmi->connector = NULL;
216 }
217
218 return ret;
219 }
220
221 /*
222 * The hdmi device:
223 */
224
225 #define HDMI_CFG(item, entry) \
226 .item ## _names = item ##_names_ ## entry, \
227 .item ## _cnt = ARRAY_SIZE(item ## _names_ ## entry)
228
229 static const char *hpd_reg_names_8960[] = {"core-vdda"};
230 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"};
231
232 static const struct hdmi_platform_config hdmi_tx_8960_config = {
233 HDMI_CFG(hpd_reg, 8960),
234 HDMI_CFG(hpd_clk, 8960),
235 };
236
237 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
238 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"};
239 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"};
240 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
241
242 static const struct hdmi_platform_config hdmi_tx_8974_config = {
243 HDMI_CFG(pwr_reg, 8x74),
244 HDMI_CFG(pwr_clk, 8x74),
245 HDMI_CFG(hpd_clk, 8x74),
246 .hpd_freq = hpd_clk_freq_8x74,
247 };
248
249 /*
250 * HDMI audio codec callbacks
251 */
msm_hdmi_audio_hw_params(struct device * dev,void * data,struct hdmi_codec_daifmt * daifmt,struct hdmi_codec_params * params)252 static int msm_hdmi_audio_hw_params(struct device *dev, void *data,
253 struct hdmi_codec_daifmt *daifmt,
254 struct hdmi_codec_params *params)
255 {
256 struct hdmi *hdmi = dev_get_drvdata(dev);
257 unsigned int chan;
258 unsigned int channel_allocation = 0;
259 unsigned int rate;
260 unsigned int level_shift = 0; /* 0dB */
261 bool down_mix = false;
262
263 DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate,
264 params->sample_width, params->cea.channels);
265
266 switch (params->cea.channels) {
267 case 2:
268 /* FR and FL speakers */
269 channel_allocation = 0;
270 chan = MSM_HDMI_AUDIO_CHANNEL_2;
271 break;
272 case 4:
273 /* FC, LFE, FR and FL speakers */
274 channel_allocation = 0x3;
275 chan = MSM_HDMI_AUDIO_CHANNEL_4;
276 break;
277 case 6:
278 /* RR, RL, FC, LFE, FR and FL speakers */
279 channel_allocation = 0x0B;
280 chan = MSM_HDMI_AUDIO_CHANNEL_6;
281 break;
282 case 8:
283 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */
284 channel_allocation = 0x1F;
285 chan = MSM_HDMI_AUDIO_CHANNEL_8;
286 break;
287 default:
288 return -EINVAL;
289 }
290
291 switch (params->sample_rate) {
292 case 32000:
293 rate = HDMI_SAMPLE_RATE_32KHZ;
294 break;
295 case 44100:
296 rate = HDMI_SAMPLE_RATE_44_1KHZ;
297 break;
298 case 48000:
299 rate = HDMI_SAMPLE_RATE_48KHZ;
300 break;
301 case 88200:
302 rate = HDMI_SAMPLE_RATE_88_2KHZ;
303 break;
304 case 96000:
305 rate = HDMI_SAMPLE_RATE_96KHZ;
306 break;
307 case 176400:
308 rate = HDMI_SAMPLE_RATE_176_4KHZ;
309 break;
310 case 192000:
311 rate = HDMI_SAMPLE_RATE_192KHZ;
312 break;
313 default:
314 DRM_DEV_ERROR(dev, "rate[%d] not supported!\n",
315 params->sample_rate);
316 return -EINVAL;
317 }
318
319 msm_hdmi_audio_set_sample_rate(hdmi, rate);
320 msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation,
321 level_shift, down_mix);
322
323 return 0;
324 }
325
msm_hdmi_audio_shutdown(struct device * dev,void * data)326 static void msm_hdmi_audio_shutdown(struct device *dev, void *data)
327 {
328 struct hdmi *hdmi = dev_get_drvdata(dev);
329
330 msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0);
331 }
332
333 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = {
334 .hw_params = msm_hdmi_audio_hw_params,
335 .audio_shutdown = msm_hdmi_audio_shutdown,
336 };
337
338 static struct hdmi_codec_pdata codec_data = {
339 .ops = &msm_hdmi_audio_codec_ops,
340 .max_i2s_channels = 8,
341 .i2s = 1,
342 };
343
msm_hdmi_register_audio_driver(struct hdmi * hdmi,struct device * dev)344 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev)
345 {
346 hdmi->audio_pdev = platform_device_register_data(dev,
347 HDMI_CODEC_DRV_NAME,
348 PLATFORM_DEVID_AUTO,
349 &codec_data,
350 sizeof(codec_data));
351 return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
352 }
353
msm_hdmi_bind(struct device * dev,struct device * master,void * data)354 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data)
355 {
356 struct msm_drm_private *priv = dev_get_drvdata(master);
357 struct hdmi *hdmi = dev_get_drvdata(dev);
358 int err;
359
360 err = msm_hdmi_init(hdmi);
361 if (err)
362 return err;
363 priv->hdmi = hdmi;
364
365 err = msm_hdmi_register_audio_driver(hdmi, dev);
366 if (err) {
367 DRM_ERROR("Failed to attach an audio codec %d\n", err);
368 hdmi->audio_pdev = NULL;
369 }
370
371 return 0;
372 }
373
msm_hdmi_unbind(struct device * dev,struct device * master,void * data)374 static void msm_hdmi_unbind(struct device *dev, struct device *master,
375 void *data)
376 {
377 struct msm_drm_private *priv = dev_get_drvdata(master);
378
379 if (priv->hdmi) {
380 if (priv->hdmi->audio_pdev)
381 platform_device_unregister(priv->hdmi->audio_pdev);
382
383 if (priv->hdmi->bridge)
384 msm_hdmi_hpd_disable(priv->hdmi);
385
386 msm_hdmi_destroy(priv->hdmi);
387 priv->hdmi = NULL;
388 }
389 }
390
391 static const struct component_ops msm_hdmi_ops = {
392 .bind = msm_hdmi_bind,
393 .unbind = msm_hdmi_unbind,
394 };
395
msm_hdmi_dev_probe(struct platform_device * pdev)396 static int msm_hdmi_dev_probe(struct platform_device *pdev)
397 {
398 const struct hdmi_platform_config *config;
399 struct device *dev = &pdev->dev;
400 struct hdmi *hdmi;
401 struct resource *res;
402 int i, ret;
403
404 config = of_device_get_match_data(dev);
405 if (!config)
406 return -EINVAL;
407
408 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
409 if (!hdmi)
410 return -ENOMEM;
411
412 hdmi->pdev = pdev;
413 hdmi->config = config;
414 spin_lock_init(&hdmi->reg_lock);
415
416 ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge);
417 if (ret && ret != -ENODEV)
418 return ret;
419
420 hdmi->mmio = msm_ioremap(pdev, "core_physical");
421 if (IS_ERR(hdmi->mmio))
422 return PTR_ERR(hdmi->mmio);
423
424 /* HDCP needs physical address of hdmi register */
425 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
426 "core_physical");
427 if (!res)
428 return -EINVAL;
429 hdmi->mmio_phy_addr = res->start;
430
431 hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical");
432 if (IS_ERR(hdmi->qfprom_mmio)) {
433 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n");
434 hdmi->qfprom_mmio = NULL;
435 }
436
437 hdmi->irq = platform_get_irq(pdev, 0);
438 if (hdmi->irq < 0)
439 return hdmi->irq;
440
441 hdmi->hpd_regs = devm_kcalloc(&pdev->dev,
442 config->hpd_reg_cnt,
443 sizeof(hdmi->hpd_regs[0]),
444 GFP_KERNEL);
445 if (!hdmi->hpd_regs)
446 return -ENOMEM;
447
448 for (i = 0; i < config->hpd_reg_cnt; i++)
449 hdmi->hpd_regs[i].supply = config->hpd_reg_names[i];
450
451 ret = devm_regulator_bulk_get(&pdev->dev, config->hpd_reg_cnt, hdmi->hpd_regs);
452 if (ret)
453 return dev_err_probe(dev, ret, "failed to get hpd regulators\n");
454
455 hdmi->pwr_regs = devm_kcalloc(&pdev->dev,
456 config->pwr_reg_cnt,
457 sizeof(hdmi->pwr_regs[0]),
458 GFP_KERNEL);
459 if (!hdmi->pwr_regs)
460 return -ENOMEM;
461
462 for (i = 0; i < config->pwr_reg_cnt; i++)
463 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i];
464
465 ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs);
466 if (ret)
467 return dev_err_probe(dev, ret, "failed to get pwr regulators\n");
468
469 hdmi->hpd_clks = devm_kcalloc(&pdev->dev,
470 config->hpd_clk_cnt,
471 sizeof(hdmi->hpd_clks[0]),
472 GFP_KERNEL);
473 if (!hdmi->hpd_clks)
474 return -ENOMEM;
475
476 for (i = 0; i < config->hpd_clk_cnt; i++) {
477 struct clk *clk;
478
479 clk = msm_clk_get(pdev, config->hpd_clk_names[i]);
480 if (IS_ERR(clk))
481 return dev_err_probe(dev, PTR_ERR(clk),
482 "failed to get hpd clk: %s\n",
483 config->hpd_clk_names[i]);
484
485 hdmi->hpd_clks[i] = clk;
486 }
487
488 hdmi->pwr_clks = devm_kcalloc(&pdev->dev,
489 config->pwr_clk_cnt,
490 sizeof(hdmi->pwr_clks[0]),
491 GFP_KERNEL);
492 if (!hdmi->pwr_clks)
493 return -ENOMEM;
494
495 for (i = 0; i < config->pwr_clk_cnt; i++) {
496 struct clk *clk;
497
498 clk = msm_clk_get(pdev, config->pwr_clk_names[i]);
499 if (IS_ERR(clk))
500 return dev_err_probe(dev, PTR_ERR(clk),
501 "failed to get pwr clk: %s\n",
502 config->pwr_clk_names[i]);
503
504 hdmi->pwr_clks[i] = clk;
505 }
506
507 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
508 /* This will catch e.g. -EPROBE_DEFER */
509 if (IS_ERR(hdmi->hpd_gpiod))
510 return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod),
511 "failed to get hpd gpio\n");
512
513 if (!hdmi->hpd_gpiod)
514 DBG("failed to get HPD gpio");
515
516 if (hdmi->hpd_gpiod)
517 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD");
518
519 ret = msm_hdmi_get_phy(hdmi);
520 if (ret) {
521 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n");
522 return ret;
523 }
524
525 ret = devm_pm_runtime_enable(&pdev->dev);
526 if (ret)
527 goto err_put_phy;
528
529 platform_set_drvdata(pdev, hdmi);
530
531 ret = component_add(&pdev->dev, &msm_hdmi_ops);
532 if (ret)
533 goto err_put_phy;
534
535 return 0;
536
537 err_put_phy:
538 msm_hdmi_put_phy(hdmi);
539 return ret;
540 }
541
msm_hdmi_dev_remove(struct platform_device * pdev)542 static void msm_hdmi_dev_remove(struct platform_device *pdev)
543 {
544 struct hdmi *hdmi = dev_get_drvdata(&pdev->dev);
545
546 component_del(&pdev->dev, &msm_hdmi_ops);
547
548 msm_hdmi_put_phy(hdmi);
549 }
550
551 static const struct of_device_id msm_hdmi_dt_match[] = {
552 { .compatible = "qcom,hdmi-tx-8998", .data = &hdmi_tx_8974_config },
553 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config },
554 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config },
555 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config },
556 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config },
557 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
558 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config },
559 {}
560 };
561
562 static struct platform_driver msm_hdmi_driver = {
563 .probe = msm_hdmi_dev_probe,
564 .remove_new = msm_hdmi_dev_remove,
565 .driver = {
566 .name = "hdmi_msm",
567 .of_match_table = msm_hdmi_dt_match,
568 },
569 };
570
msm_hdmi_register(void)571 void __init msm_hdmi_register(void)
572 {
573 msm_hdmi_phy_driver_register();
574 platform_driver_register(&msm_hdmi_driver);
575 }
576
msm_hdmi_unregister(void)577 void __exit msm_hdmi_unregister(void)
578 {
579 platform_driver_unregister(&msm_hdmi_driver);
580 msm_hdmi_phy_driver_unregister();
581 }
582