hdmi.c

  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/pinctrl/consumer.h>
 12#include <linux/platform_device.h>
 13
 14#include <drm/drm_bridge_connector.h>
 15#include <drm/drm_of.h>
 16#include <drm/display/drm_hdmi_state_helper.h>
 17
 18#include "msm_kms.h"
 19#include "hdmi.h"
 20
 21void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on)
 22{
 23	uint32_t ctrl = 0;
 24	unsigned long flags;
 25
 26	spin_lock_irqsave(&hdmi->reg_lock, flags);
 27	if (power_on) {
 28		ctrl |= HDMI_CTRL_ENABLE;
 29		if (!hdmi->connector->display_info.is_hdmi) {
 30			ctrl |= HDMI_CTRL_HDMI;
 31			hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
 32			ctrl &= ~HDMI_CTRL_HDMI;
 33		} else {
 34			ctrl |= HDMI_CTRL_HDMI;
 35		}
 36	} else {
 37		ctrl = HDMI_CTRL_HDMI;
 38	}
 39
 40	hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
 41	spin_unlock_irqrestore(&hdmi->reg_lock, flags);
 42	DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
 43			power_on ? "Enable" : "Disable", ctrl);
 44}
 45
 46static irqreturn_t msm_hdmi_irq(int irq, void *dev_id)
 47{
 48	struct hdmi *hdmi = dev_id;
 49
 50	/* Process HPD: */
 51	msm_hdmi_hpd_irq(hdmi->bridge);
 52
 53	/* Process DDC: */
 54	msm_hdmi_i2c_irq(hdmi->i2c);
 55
 56	/* Process HDCP: */
 57	if (hdmi->hdcp_ctrl)
 58		msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl);
 59
 60	/* TODO audio.. */
 61
 62	return IRQ_HANDLED;
 63}
 64
 65static void msm_hdmi_destroy(struct hdmi *hdmi)
 66{
 67	/*
 68	 * at this point, hpd has been disabled,
 69	 * after flush workq, it's safe to deinit hdcp
 70	 */
 71	if (hdmi->workq)
 72		destroy_workqueue(hdmi->workq);
 73	msm_hdmi_hdcp_destroy(hdmi);
 74
 75	if (hdmi->i2c)
 76		msm_hdmi_i2c_destroy(hdmi->i2c);
 77}
 78
 79static void msm_hdmi_put_phy(struct hdmi *hdmi)
 80{
 81	if (hdmi->phy_dev) {
 82		put_device(hdmi->phy_dev);
 83		hdmi->phy = NULL;
 84		hdmi->phy_dev = NULL;
 85	}
 86}
 87
 88static int msm_hdmi_get_phy(struct hdmi *hdmi)
 89{
 90	struct platform_device *pdev = hdmi->pdev;
 91	struct platform_device *phy_pdev;
 92	struct device_node *phy_node;
 93
 94	phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
 95	if (!phy_node) {
 96		DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
 97		return -ENXIO;
 98	}
 99
100	phy_pdev = of_find_device_by_node(phy_node);
101	of_node_put(phy_node);
102
103	if (!phy_pdev)
104		return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n");
105
106	hdmi->phy = platform_get_drvdata(phy_pdev);
107	if (!hdmi->phy) {
108		put_device(&phy_pdev->dev);
109		return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n");
110	}
111
112	hdmi->phy_dev = &phy_pdev->dev;
113
114	return 0;
115}
116
117/* construct hdmi at bind/probe time, grab all the resources.  If
118 * we are to EPROBE_DEFER we want to do it here, rather than later
119 * at modeset_init() time
120 */
121static int msm_hdmi_init(struct hdmi *hdmi)
122{
123	struct platform_device *pdev = hdmi->pdev;
124	int ret;
125
126	hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
127	if (!hdmi->workq) {
128		ret = -ENOMEM;
129		goto fail;
130	}
131
132	hdmi->i2c = msm_hdmi_i2c_init(hdmi);
133	if (IS_ERR(hdmi->i2c)) {
134		ret = PTR_ERR(hdmi->i2c);
135		DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret);
136		hdmi->i2c = NULL;
137		goto fail;
138	}
139
140	hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi);
141	if (IS_ERR(hdmi->hdcp_ctrl)) {
142		dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
143		hdmi->hdcp_ctrl = NULL;
144	}
145
146	return 0;
147
148fail:
149	msm_hdmi_destroy(hdmi);
150
151	return ret;
152}
153
154/* Second part of initialization, the drm/kms level modeset_init,
155 * constructs/initializes mode objects, etc, is called from master
156 * driver (not hdmi sub-device's probe/bind!)
157 *
158 * Any resource (regulator/clk/etc) which could be missing at boot
159 * should be handled in msm_hdmi_init() so that failure happens from
160 * hdmi sub-device's probe.
161 */
162int msm_hdmi_modeset_init(struct hdmi *hdmi,
163		struct drm_device *dev, struct drm_encoder *encoder)
164{
165	int ret;
166
167	hdmi->dev = dev;
168	hdmi->encoder = encoder;
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	return 0;
205
206fail:
207	if (hdmi->connector) {
208		hdmi->connector->funcs->destroy(hdmi->connector);
209		hdmi->connector = NULL;
210	}
211
212	return ret;
213}
214
215/*
216 * The hdmi device:
217 */
218
219static const char * const pwr_reg_names_8960[] = {"core-vdda"};
220static const char * const pwr_clk_names_8960[] = {"core", "master_iface", "slave_iface"};
221
222static const struct hdmi_platform_config hdmi_tx_8960_config = {
223	.pwr_reg_names = pwr_reg_names_8960,
224	.pwr_reg_cnt = ARRAY_SIZE(pwr_reg_names_8960),
225	.pwr_clk_names = pwr_clk_names_8960,
226	.pwr_clk_cnt = ARRAY_SIZE(pwr_clk_names_8960),
227};
228
229static const char * const pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
230static const char * const pwr_clk_names_8x74[] = {"iface", "core", "mdp_core", "alt_iface"};
231
232static const struct hdmi_platform_config hdmi_tx_8974_config = {
233	.pwr_reg_names = pwr_reg_names_8x74,
234	.pwr_reg_cnt = ARRAY_SIZE(pwr_reg_names_8x74),
235	.pwr_clk_names = pwr_clk_names_8x74,
236	.pwr_clk_cnt = ARRAY_SIZE(pwr_clk_names_8x74),
237};
238
239static int msm_hdmi_bind(struct device *dev, struct device *master, void *data)
240{
241	struct msm_drm_private *priv = dev_get_drvdata(master);
242	struct hdmi *hdmi = dev_get_drvdata(dev);
243	int err;
244
245	err = msm_hdmi_init(hdmi);
246	if (err)
247		return err;
248	priv->kms->hdmi = hdmi;
249
250	return 0;
251}
252
253static void msm_hdmi_unbind(struct device *dev, struct device *master,
254		void *data)
255{
256	struct msm_drm_private *priv = dev_get_drvdata(master);
257
258	if (priv->kms->hdmi) {
259		msm_hdmi_destroy(priv->kms->hdmi);
260		priv->kms->hdmi = NULL;
261	}
262}
263
264static const struct component_ops msm_hdmi_ops = {
265		.bind   = msm_hdmi_bind,
266		.unbind = msm_hdmi_unbind,
267};
268
269static int msm_hdmi_dev_probe(struct platform_device *pdev)
270{
271	const struct hdmi_platform_config *config;
272	struct device *dev = &pdev->dev;
273	struct hdmi *hdmi;
274	struct resource *res;
275	int i, ret;
276
277	config = of_device_get_match_data(dev);
278	if (!config)
279		return -EINVAL;
280
281	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
282	if (!hdmi)
283		return -ENOMEM;
284
285	hdmi->pdev = pdev;
286	hdmi->config = config;
287	spin_lock_init(&hdmi->reg_lock);
288	mutex_init(&hdmi->state_mutex);
289
290	ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge);
291	if (ret && ret != -ENODEV)
292		return ret;
293
294	hdmi->mmio = msm_ioremap(pdev, "core_physical");
295	if (IS_ERR(hdmi->mmio))
296		return PTR_ERR(hdmi->mmio);
297
298	/* HDCP needs physical address of hdmi register */
299	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
300		"core_physical");
301	if (!res)
302		return -EINVAL;
303	hdmi->mmio_phy_addr = res->start;
304
305	hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical");
306	if (IS_ERR(hdmi->qfprom_mmio)) {
307		DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n");
308		hdmi->qfprom_mmio = NULL;
309	}
310
311	hdmi->irq = platform_get_irq(pdev, 0);
312	if (hdmi->irq < 0)
313		return hdmi->irq;
314
315	hdmi->pwr_regs = devm_kcalloc(&pdev->dev,
316				      config->pwr_reg_cnt,
317				      sizeof(hdmi->pwr_regs[0]),
318				      GFP_KERNEL);
319	if (!hdmi->pwr_regs)
320		return -ENOMEM;
321
322	for (i = 0; i < config->pwr_reg_cnt; i++)
323		hdmi->pwr_regs[i].supply = config->pwr_reg_names[i];
324
325	ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs);
326	if (ret)
327		return dev_err_probe(dev, ret, "failed to get pwr regulators\n");
328
329	hdmi->pwr_clks = devm_kcalloc(&pdev->dev,
330				      config->pwr_clk_cnt,
331				      sizeof(hdmi->pwr_clks[0]),
332				      GFP_KERNEL);
333	if (!hdmi->pwr_clks)
334		return -ENOMEM;
335
336	for (i = 0; i < config->pwr_clk_cnt; i++)
337		hdmi->pwr_clks[i].id = config->pwr_clk_names[i];
338
339	ret = devm_clk_bulk_get(&pdev->dev, config->pwr_clk_cnt, hdmi->pwr_clks);
340	if (ret)
341		return ret;
342
343	hdmi->extp_clk = devm_clk_get_optional(&pdev->dev, "extp");
344	if (IS_ERR(hdmi->extp_clk))
345		return dev_err_probe(dev, PTR_ERR(hdmi->extp_clk),
346				     "failed to get extp clock\n");
347
348	hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
349	/* This will catch e.g. -EPROBE_DEFER */
350	if (IS_ERR(hdmi->hpd_gpiod))
351		return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod),
352				     "failed to get hpd gpio\n");
353
354	if (!hdmi->hpd_gpiod)
355		DBG("failed to get HPD gpio");
356
357	if (hdmi->hpd_gpiod)
358		gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD");
359
360	ret = msm_hdmi_get_phy(hdmi);
361	if (ret) {
362		DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n");
363		return ret;
364	}
365
366	ret = devm_pm_runtime_enable(&pdev->dev);
367	if (ret)
368		goto err_put_phy;
369
370	platform_set_drvdata(pdev, hdmi);
371
372	ret = component_add(&pdev->dev, &msm_hdmi_ops);
373	if (ret)
374		goto err_put_phy;
375
376	return 0;
377
378err_put_phy:
379	msm_hdmi_put_phy(hdmi);
380	return ret;
381}
382
383static void msm_hdmi_dev_remove(struct platform_device *pdev)
384{
385	struct hdmi *hdmi = dev_get_drvdata(&pdev->dev);
386
387	component_del(&pdev->dev, &msm_hdmi_ops);
388
389	msm_hdmi_put_phy(hdmi);
390}
391
392static int msm_hdmi_runtime_suspend(struct device *dev)
393{
394	struct hdmi *hdmi = dev_get_drvdata(dev);
395	const struct hdmi_platform_config *config = hdmi->config;
396
397	clk_bulk_disable_unprepare(config->pwr_clk_cnt, hdmi->pwr_clks);
398
399	pinctrl_pm_select_sleep_state(dev);
400
401	regulator_bulk_disable(config->pwr_reg_cnt, hdmi->pwr_regs);
402
403	return 0;
404}
405
406static int msm_hdmi_runtime_resume(struct device *dev)
407{
408	struct hdmi *hdmi = dev_get_drvdata(dev);
409	const struct hdmi_platform_config *config = hdmi->config;
410	int ret;
411
412	ret = regulator_bulk_enable(config->pwr_reg_cnt, hdmi->pwr_regs);
413	if (ret)
414		return ret;
415
416	ret = pinctrl_pm_select_default_state(dev);
417	if (ret)
418		goto fail;
419
420	ret = clk_bulk_prepare_enable(config->pwr_clk_cnt, hdmi->pwr_clks);
421	if (ret)
422		goto fail;
423
424	return 0;
425
426fail:
427	pinctrl_pm_select_sleep_state(dev);
428
429	return ret;
430}
431
432DEFINE_RUNTIME_DEV_PM_OPS(msm_hdmi_pm_ops, msm_hdmi_runtime_suspend, msm_hdmi_runtime_resume, NULL);
433
434static const struct of_device_id msm_hdmi_dt_match[] = {
435	{ .compatible = "qcom,hdmi-tx-8998", .data = &hdmi_tx_8974_config },
436	{ .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config },
437	{ .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config },
438	{ .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config },
439	{ .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config },
440	{ .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
441	{ .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config },
442	{}
443};
444
445static struct platform_driver msm_hdmi_driver = {
446	.probe = msm_hdmi_dev_probe,
447	.remove = msm_hdmi_dev_remove,
448	.driver = {
449		.name = "hdmi_msm",
450		.of_match_table = msm_hdmi_dt_match,
451		.pm = &msm_hdmi_pm_ops,
452	},
453};
454
455void __init msm_hdmi_register(void)
456{
457	msm_hdmi_phy_driver_register();
458	platform_driver_register(&msm_hdmi_driver);
459}
460
461void __exit msm_hdmi_unregister(void)
462{
463	platform_driver_unregister(&msm_hdmi_driver);
464	msm_hdmi_phy_driver_unregister();
465}