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1/*
2 * Copyright 2016 Linaro Ltd.
3 * Copyright 2016 ZTE Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 */
10
11#include <linux/clk.h>
12#include <linux/component.h>
13#include <linux/delay.h>
14#include <linux/err.h>
15#include <linux/hdmi.h>
16#include <linux/irq.h>
17#include <linux/mfd/syscon.h>
18#include <linux/module.h>
19#include <linux/mutex.h>
20#include <linux/of_device.h>
21
22#include <drm/drm_atomic_helper.h>
23#include <drm/drm_crtc_helper.h>
24#include <drm/drm_edid.h>
25#include <drm/drm_of.h>
26#include <drm/drmP.h>
27
28#include <sound/hdmi-codec.h>
29
30#include "zx_hdmi_regs.h"
31#include "zx_vou.h"
32
33#define ZX_HDMI_INFOFRAME_SIZE 31
34#define DDC_SEGMENT_ADDR 0x30
35
36struct zx_hdmi_i2c {
37 struct i2c_adapter adap;
38 struct mutex lock;
39};
40
41struct zx_hdmi {
42 struct drm_connector connector;
43 struct drm_encoder encoder;
44 struct zx_hdmi_i2c *ddc;
45 struct device *dev;
46 struct drm_device *drm;
47 void __iomem *mmio;
48 struct clk *cec_clk;
49 struct clk *osc_clk;
50 struct clk *xclk;
51 bool sink_is_hdmi;
52 bool sink_has_audio;
53 struct platform_device *audio_pdev;
54};
55
56#define to_zx_hdmi(x) container_of(x, struct zx_hdmi, x)
57
58static inline u8 hdmi_readb(struct zx_hdmi *hdmi, u16 offset)
59{
60 return readl_relaxed(hdmi->mmio + offset * 4);
61}
62
63static inline void hdmi_writeb(struct zx_hdmi *hdmi, u16 offset, u8 val)
64{
65 writel_relaxed(val, hdmi->mmio + offset * 4);
66}
67
68static inline void hdmi_writeb_mask(struct zx_hdmi *hdmi, u16 offset,
69 u8 mask, u8 val)
70{
71 u8 tmp;
72
73 tmp = hdmi_readb(hdmi, offset);
74 tmp = (tmp & ~mask) | (val & mask);
75 hdmi_writeb(hdmi, offset, tmp);
76}
77
78static int zx_hdmi_infoframe_trans(struct zx_hdmi *hdmi,
79 union hdmi_infoframe *frame, u8 fsel)
80{
81 u8 buffer[ZX_HDMI_INFOFRAME_SIZE];
82 int num;
83 int i;
84
85 hdmi_writeb(hdmi, TPI_INFO_FSEL, fsel);
86
87 num = hdmi_infoframe_pack(frame, buffer, ZX_HDMI_INFOFRAME_SIZE);
88 if (num < 0) {
89 DRM_DEV_ERROR(hdmi->dev, "failed to pack infoframe: %d\n", num);
90 return num;
91 }
92
93 for (i = 0; i < num; i++)
94 hdmi_writeb(hdmi, TPI_INFO_B0 + i, buffer[i]);
95
96 hdmi_writeb_mask(hdmi, TPI_INFO_EN, TPI_INFO_TRANS_RPT,
97 TPI_INFO_TRANS_RPT);
98 hdmi_writeb_mask(hdmi, TPI_INFO_EN, TPI_INFO_TRANS_EN,
99 TPI_INFO_TRANS_EN);
100
101 return num;
102}
103
104static int zx_hdmi_config_video_vsi(struct zx_hdmi *hdmi,
105 struct drm_display_mode *mode)
106{
107 union hdmi_infoframe frame;
108 int ret;
109
110 ret = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
111 &hdmi->connector,
112 mode);
113 if (ret) {
114 DRM_DEV_ERROR(hdmi->dev, "failed to get vendor infoframe: %d\n",
115 ret);
116 return ret;
117 }
118
119 return zx_hdmi_infoframe_trans(hdmi, &frame, FSEL_VSIF);
120}
121
122static int zx_hdmi_config_video_avi(struct zx_hdmi *hdmi,
123 struct drm_display_mode *mode)
124{
125 union hdmi_infoframe frame;
126 int ret;
127
128 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode, false);
129 if (ret) {
130 DRM_DEV_ERROR(hdmi->dev, "failed to get avi infoframe: %d\n",
131 ret);
132 return ret;
133 }
134
135 /* We always use YUV444 for HDMI output. */
136 frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
137
138 return zx_hdmi_infoframe_trans(hdmi, &frame, FSEL_AVI);
139}
140
141static void zx_hdmi_encoder_mode_set(struct drm_encoder *encoder,
142 struct drm_display_mode *mode,
143 struct drm_display_mode *adj_mode)
144{
145 struct zx_hdmi *hdmi = to_zx_hdmi(encoder);
146
147 if (hdmi->sink_is_hdmi) {
148 zx_hdmi_config_video_avi(hdmi, mode);
149 zx_hdmi_config_video_vsi(hdmi, mode);
150 }
151}
152
153static void zx_hdmi_phy_start(struct zx_hdmi *hdmi)
154{
155 /* Copy from ZTE BSP code */
156 hdmi_writeb(hdmi, 0x222, 0x0);
157 hdmi_writeb(hdmi, 0x224, 0x4);
158 hdmi_writeb(hdmi, 0x909, 0x0);
159 hdmi_writeb(hdmi, 0x7b0, 0x90);
160 hdmi_writeb(hdmi, 0x7b1, 0x00);
161 hdmi_writeb(hdmi, 0x7b2, 0xa7);
162 hdmi_writeb(hdmi, 0x7b8, 0xaa);
163 hdmi_writeb(hdmi, 0x7b2, 0xa7);
164 hdmi_writeb(hdmi, 0x7b3, 0x0f);
165 hdmi_writeb(hdmi, 0x7b4, 0x0f);
166 hdmi_writeb(hdmi, 0x7b5, 0x55);
167 hdmi_writeb(hdmi, 0x7b7, 0x03);
168 hdmi_writeb(hdmi, 0x7b9, 0x12);
169 hdmi_writeb(hdmi, 0x7ba, 0x32);
170 hdmi_writeb(hdmi, 0x7bc, 0x68);
171 hdmi_writeb(hdmi, 0x7be, 0x40);
172 hdmi_writeb(hdmi, 0x7bf, 0x84);
173 hdmi_writeb(hdmi, 0x7c1, 0x0f);
174 hdmi_writeb(hdmi, 0x7c8, 0x02);
175 hdmi_writeb(hdmi, 0x7c9, 0x03);
176 hdmi_writeb(hdmi, 0x7ca, 0x40);
177 hdmi_writeb(hdmi, 0x7dc, 0x31);
178 hdmi_writeb(hdmi, 0x7e2, 0x04);
179 hdmi_writeb(hdmi, 0x7e0, 0x06);
180 hdmi_writeb(hdmi, 0x7cb, 0x68);
181 hdmi_writeb(hdmi, 0x7f9, 0x02);
182 hdmi_writeb(hdmi, 0x7b6, 0x02);
183 hdmi_writeb(hdmi, 0x7f3, 0x0);
184}
185
186static void zx_hdmi_hw_enable(struct zx_hdmi *hdmi)
187{
188 /* Enable pclk */
189 hdmi_writeb_mask(hdmi, CLKPWD, CLKPWD_PDIDCK, CLKPWD_PDIDCK);
190
191 /* Enable HDMI for TX */
192 hdmi_writeb_mask(hdmi, FUNC_SEL, FUNC_HDMI_EN, FUNC_HDMI_EN);
193
194 /* Enable deep color packet */
195 hdmi_writeb_mask(hdmi, P2T_CTRL, P2T_DC_PKT_EN, P2T_DC_PKT_EN);
196
197 /* Enable HDMI/MHL mode for output */
198 hdmi_writeb_mask(hdmi, TEST_TXCTRL, TEST_TXCTRL_HDMI_MODE,
199 TEST_TXCTRL_HDMI_MODE);
200
201 /* Configure reg_qc_sel */
202 hdmi_writeb(hdmi, HDMICTL4, 0x3);
203
204 /* Enable interrupt */
205 hdmi_writeb_mask(hdmi, INTR1_MASK, INTR1_MONITOR_DETECT,
206 INTR1_MONITOR_DETECT);
207
208 /* Start up phy */
209 zx_hdmi_phy_start(hdmi);
210}
211
212static void zx_hdmi_hw_disable(struct zx_hdmi *hdmi)
213{
214 /* Disable interrupt */
215 hdmi_writeb_mask(hdmi, INTR1_MASK, INTR1_MONITOR_DETECT, 0);
216
217 /* Disable deep color packet */
218 hdmi_writeb_mask(hdmi, P2T_CTRL, P2T_DC_PKT_EN, P2T_DC_PKT_EN);
219
220 /* Disable HDMI for TX */
221 hdmi_writeb_mask(hdmi, FUNC_SEL, FUNC_HDMI_EN, 0);
222
223 /* Disable pclk */
224 hdmi_writeb_mask(hdmi, CLKPWD, CLKPWD_PDIDCK, 0);
225}
226
227static void zx_hdmi_encoder_enable(struct drm_encoder *encoder)
228{
229 struct zx_hdmi *hdmi = to_zx_hdmi(encoder);
230
231 clk_prepare_enable(hdmi->cec_clk);
232 clk_prepare_enable(hdmi->osc_clk);
233 clk_prepare_enable(hdmi->xclk);
234
235 zx_hdmi_hw_enable(hdmi);
236
237 vou_inf_enable(VOU_HDMI, encoder->crtc);
238}
239
240static void zx_hdmi_encoder_disable(struct drm_encoder *encoder)
241{
242 struct zx_hdmi *hdmi = to_zx_hdmi(encoder);
243
244 vou_inf_disable(VOU_HDMI, encoder->crtc);
245
246 zx_hdmi_hw_disable(hdmi);
247
248 clk_disable_unprepare(hdmi->xclk);
249 clk_disable_unprepare(hdmi->osc_clk);
250 clk_disable_unprepare(hdmi->cec_clk);
251}
252
253static const struct drm_encoder_helper_funcs zx_hdmi_encoder_helper_funcs = {
254 .enable = zx_hdmi_encoder_enable,
255 .disable = zx_hdmi_encoder_disable,
256 .mode_set = zx_hdmi_encoder_mode_set,
257};
258
259static const struct drm_encoder_funcs zx_hdmi_encoder_funcs = {
260 .destroy = drm_encoder_cleanup,
261};
262
263static int zx_hdmi_connector_get_modes(struct drm_connector *connector)
264{
265 struct zx_hdmi *hdmi = to_zx_hdmi(connector);
266 struct edid *edid;
267 int ret;
268
269 edid = drm_get_edid(connector, &hdmi->ddc->adap);
270 if (!edid)
271 return 0;
272
273 hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
274 hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
275 drm_mode_connector_update_edid_property(connector, edid);
276 ret = drm_add_edid_modes(connector, edid);
277 kfree(edid);
278
279 return ret;
280}
281
282static enum drm_mode_status
283zx_hdmi_connector_mode_valid(struct drm_connector *connector,
284 struct drm_display_mode *mode)
285{
286 return MODE_OK;
287}
288
289static struct drm_connector_helper_funcs zx_hdmi_connector_helper_funcs = {
290 .get_modes = zx_hdmi_connector_get_modes,
291 .mode_valid = zx_hdmi_connector_mode_valid,
292};
293
294static enum drm_connector_status
295zx_hdmi_connector_detect(struct drm_connector *connector, bool force)
296{
297 struct zx_hdmi *hdmi = to_zx_hdmi(connector);
298
299 return (hdmi_readb(hdmi, TPI_HPD_RSEN) & TPI_HPD_CONNECTION) ?
300 connector_status_connected : connector_status_disconnected;
301}
302
303static const struct drm_connector_funcs zx_hdmi_connector_funcs = {
304 .fill_modes = drm_helper_probe_single_connector_modes,
305 .detect = zx_hdmi_connector_detect,
306 .destroy = drm_connector_cleanup,
307 .reset = drm_atomic_helper_connector_reset,
308 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
309 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
310};
311
312static int zx_hdmi_register(struct drm_device *drm, struct zx_hdmi *hdmi)
313{
314 struct drm_encoder *encoder = &hdmi->encoder;
315
316 encoder->possible_crtcs = VOU_CRTC_MASK;
317
318 drm_encoder_init(drm, encoder, &zx_hdmi_encoder_funcs,
319 DRM_MODE_ENCODER_TMDS, NULL);
320 drm_encoder_helper_add(encoder, &zx_hdmi_encoder_helper_funcs);
321
322 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
323
324 drm_connector_init(drm, &hdmi->connector, &zx_hdmi_connector_funcs,
325 DRM_MODE_CONNECTOR_HDMIA);
326 drm_connector_helper_add(&hdmi->connector,
327 &zx_hdmi_connector_helper_funcs);
328
329 drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
330
331 return 0;
332}
333
334static irqreturn_t zx_hdmi_irq_thread(int irq, void *dev_id)
335{
336 struct zx_hdmi *hdmi = dev_id;
337
338 drm_helper_hpd_irq_event(hdmi->connector.dev);
339
340 return IRQ_HANDLED;
341}
342
343static irqreturn_t zx_hdmi_irq_handler(int irq, void *dev_id)
344{
345 struct zx_hdmi *hdmi = dev_id;
346 u8 lstat;
347
348 lstat = hdmi_readb(hdmi, L1_INTR_STAT);
349
350 /* Monitor detect/HPD interrupt */
351 if (lstat & L1_INTR_STAT_INTR1) {
352 u8 stat;
353
354 stat = hdmi_readb(hdmi, INTR1_STAT);
355 hdmi_writeb(hdmi, INTR1_STAT, stat);
356
357 if (stat & INTR1_MONITOR_DETECT)
358 return IRQ_WAKE_THREAD;
359 }
360
361 return IRQ_NONE;
362}
363
364static int zx_hdmi_audio_startup(struct device *dev, void *data)
365{
366 struct zx_hdmi *hdmi = dev_get_drvdata(dev);
367 struct drm_encoder *encoder = &hdmi->encoder;
368
369 vou_inf_hdmi_audio_sel(encoder->crtc, VOU_HDMI_AUD_SPDIF);
370
371 return 0;
372}
373
374static void zx_hdmi_audio_shutdown(struct device *dev, void *data)
375{
376 struct zx_hdmi *hdmi = dev_get_drvdata(dev);
377
378 /* Disable audio input */
379 hdmi_writeb_mask(hdmi, AUD_EN, AUD_IN_EN, 0);
380}
381
382static inline int zx_hdmi_audio_get_n(unsigned int fs)
383{
384 unsigned int n;
385
386 if (fs && (fs % 44100) == 0)
387 n = 6272 * (fs / 44100);
388 else
389 n = fs * 128 / 1000;
390
391 return n;
392}
393
394static int zx_hdmi_audio_hw_params(struct device *dev,
395 void *data,
396 struct hdmi_codec_daifmt *daifmt,
397 struct hdmi_codec_params *params)
398{
399 struct zx_hdmi *hdmi = dev_get_drvdata(dev);
400 struct hdmi_audio_infoframe *cea = ¶ms->cea;
401 union hdmi_infoframe frame;
402 int n;
403
404 /* We only support spdif for now */
405 if (daifmt->fmt != HDMI_SPDIF) {
406 DRM_DEV_ERROR(hdmi->dev, "invalid daifmt %d\n", daifmt->fmt);
407 return -EINVAL;
408 }
409
410 switch (params->sample_width) {
411 case 16:
412 hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK,
413 SPDIF_SAMPLE_SIZE_16BIT);
414 break;
415 case 20:
416 hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK,
417 SPDIF_SAMPLE_SIZE_20BIT);
418 break;
419 case 24:
420 hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK,
421 SPDIF_SAMPLE_SIZE_24BIT);
422 break;
423 default:
424 DRM_DEV_ERROR(hdmi->dev, "invalid sample width %d\n",
425 params->sample_width);
426 return -EINVAL;
427 }
428
429 /* CTS is calculated by hardware, and we only need to take care of N */
430 n = zx_hdmi_audio_get_n(params->sample_rate);
431 hdmi_writeb(hdmi, N_SVAL1, n & 0xff);
432 hdmi_writeb(hdmi, N_SVAL2, (n >> 8) & 0xff);
433 hdmi_writeb(hdmi, N_SVAL3, (n >> 16) & 0xf);
434
435 /* Enable spdif mode */
436 hdmi_writeb_mask(hdmi, AUD_MODE, SPDIF_EN, SPDIF_EN);
437
438 /* Enable audio input */
439 hdmi_writeb_mask(hdmi, AUD_EN, AUD_IN_EN, AUD_IN_EN);
440
441 memcpy(&frame.audio, cea, sizeof(*cea));
442
443 return zx_hdmi_infoframe_trans(hdmi, &frame, FSEL_AUDIO);
444}
445
446static int zx_hdmi_audio_digital_mute(struct device *dev, void *data,
447 bool enable)
448{
449 struct zx_hdmi *hdmi = dev_get_drvdata(dev);
450
451 if (enable)
452 hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, TPI_AUD_MUTE,
453 TPI_AUD_MUTE);
454 else
455 hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, TPI_AUD_MUTE, 0);
456
457 return 0;
458}
459
460static int zx_hdmi_audio_get_eld(struct device *dev, void *data,
461 uint8_t *buf, size_t len)
462{
463 struct zx_hdmi *hdmi = dev_get_drvdata(dev);
464 struct drm_connector *connector = &hdmi->connector;
465
466 memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
467
468 return 0;
469}
470
471static const struct hdmi_codec_ops zx_hdmi_codec_ops = {
472 .audio_startup = zx_hdmi_audio_startup,
473 .hw_params = zx_hdmi_audio_hw_params,
474 .audio_shutdown = zx_hdmi_audio_shutdown,
475 .digital_mute = zx_hdmi_audio_digital_mute,
476 .get_eld = zx_hdmi_audio_get_eld,
477};
478
479static struct hdmi_codec_pdata zx_hdmi_codec_pdata = {
480 .ops = &zx_hdmi_codec_ops,
481 .spdif = 1,
482};
483
484static int zx_hdmi_audio_register(struct zx_hdmi *hdmi)
485{
486 struct platform_device *pdev;
487
488 pdev = platform_device_register_data(hdmi->dev, HDMI_CODEC_DRV_NAME,
489 PLATFORM_DEVID_AUTO,
490 &zx_hdmi_codec_pdata,
491 sizeof(zx_hdmi_codec_pdata));
492 if (IS_ERR(pdev))
493 return PTR_ERR(pdev);
494
495 hdmi->audio_pdev = pdev;
496
497 return 0;
498}
499
500static int zx_hdmi_i2c_read(struct zx_hdmi *hdmi, struct i2c_msg *msg)
501{
502 int len = msg->len;
503 u8 *buf = msg->buf;
504 int retry = 0;
505 int ret = 0;
506
507 /* Bits [9:8] of bytes */
508 hdmi_writeb(hdmi, ZX_DDC_DIN_CNT2, (len >> 8) & 0xff);
509 /* Bits [7:0] of bytes */
510 hdmi_writeb(hdmi, ZX_DDC_DIN_CNT1, len & 0xff);
511
512 /* Clear FIFO */
513 hdmi_writeb_mask(hdmi, ZX_DDC_CMD, DDC_CMD_MASK, DDC_CMD_CLEAR_FIFO);
514
515 /* Kick off the read */
516 hdmi_writeb_mask(hdmi, ZX_DDC_CMD, DDC_CMD_MASK,
517 DDC_CMD_SEQUENTIAL_READ);
518
519 while (len > 0) {
520 int cnt, i;
521
522 /* FIFO needs some time to get ready */
523 usleep_range(500, 1000);
524
525 cnt = hdmi_readb(hdmi, ZX_DDC_DOUT_CNT) & DDC_DOUT_CNT_MASK;
526 if (cnt == 0) {
527 if (++retry > 5) {
528 DRM_DEV_ERROR(hdmi->dev,
529 "DDC FIFO read timed out!");
530 return -ETIMEDOUT;
531 }
532 continue;
533 }
534
535 for (i = 0; i < cnt; i++)
536 *buf++ = hdmi_readb(hdmi, ZX_DDC_DATA);
537 len -= cnt;
538 }
539
540 return ret;
541}
542
543static int zx_hdmi_i2c_write(struct zx_hdmi *hdmi, struct i2c_msg *msg)
544{
545 /*
546 * The DDC I2C adapter is only for reading EDID data, so we assume
547 * that the write to this adapter must be the EDID data offset.
548 */
549 if ((msg->len != 1) ||
550 ((msg->addr != DDC_ADDR) && (msg->addr != DDC_SEGMENT_ADDR)))
551 return -EINVAL;
552
553 if (msg->addr == DDC_SEGMENT_ADDR)
554 hdmi_writeb(hdmi, ZX_DDC_SEGM, msg->addr << 1);
555 else if (msg->addr == DDC_ADDR)
556 hdmi_writeb(hdmi, ZX_DDC_ADDR, msg->addr << 1);
557
558 hdmi_writeb(hdmi, ZX_DDC_OFFSET, msg->buf[0]);
559
560 return 0;
561}
562
563static int zx_hdmi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
564 int num)
565{
566 struct zx_hdmi *hdmi = i2c_get_adapdata(adap);
567 struct zx_hdmi_i2c *ddc = hdmi->ddc;
568 int i, ret = 0;
569
570 mutex_lock(&ddc->lock);
571
572 /* Enable DDC master access */
573 hdmi_writeb_mask(hdmi, TPI_DDC_MASTER_EN, HW_DDC_MASTER, HW_DDC_MASTER);
574
575 for (i = 0; i < num; i++) {
576 DRM_DEV_DEBUG(hdmi->dev,
577 "xfer: num: %d/%d, len: %d, flags: %#x\n",
578 i + 1, num, msgs[i].len, msgs[i].flags);
579
580 if (msgs[i].flags & I2C_M_RD)
581 ret = zx_hdmi_i2c_read(hdmi, &msgs[i]);
582 else
583 ret = zx_hdmi_i2c_write(hdmi, &msgs[i]);
584
585 if (ret < 0)
586 break;
587 }
588
589 if (!ret)
590 ret = num;
591
592 /* Disable DDC master access */
593 hdmi_writeb_mask(hdmi, TPI_DDC_MASTER_EN, HW_DDC_MASTER, 0);
594
595 mutex_unlock(&ddc->lock);
596
597 return ret;
598}
599
600static u32 zx_hdmi_i2c_func(struct i2c_adapter *adapter)
601{
602 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
603}
604
605static const struct i2c_algorithm zx_hdmi_algorithm = {
606 .master_xfer = zx_hdmi_i2c_xfer,
607 .functionality = zx_hdmi_i2c_func,
608};
609
610static int zx_hdmi_ddc_register(struct zx_hdmi *hdmi)
611{
612 struct i2c_adapter *adap;
613 struct zx_hdmi_i2c *ddc;
614 int ret;
615
616 ddc = devm_kzalloc(hdmi->dev, sizeof(*ddc), GFP_KERNEL);
617 if (!ddc)
618 return -ENOMEM;
619
620 hdmi->ddc = ddc;
621 mutex_init(&ddc->lock);
622
623 adap = &ddc->adap;
624 adap->owner = THIS_MODULE;
625 adap->class = I2C_CLASS_DDC;
626 adap->dev.parent = hdmi->dev;
627 adap->algo = &zx_hdmi_algorithm;
628 snprintf(adap->name, sizeof(adap->name), "zx hdmi i2c");
629
630 ret = i2c_add_adapter(adap);
631 if (ret) {
632 DRM_DEV_ERROR(hdmi->dev, "failed to add I2C adapter: %d\n",
633 ret);
634 return ret;
635 }
636
637 i2c_set_adapdata(adap, hdmi);
638
639 return 0;
640}
641
642static int zx_hdmi_bind(struct device *dev, struct device *master, void *data)
643{
644 struct platform_device *pdev = to_platform_device(dev);
645 struct drm_device *drm = data;
646 struct resource *res;
647 struct zx_hdmi *hdmi;
648 int irq;
649 int ret;
650
651 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
652 if (!hdmi)
653 return -ENOMEM;
654
655 hdmi->dev = dev;
656 hdmi->drm = drm;
657
658 dev_set_drvdata(dev, hdmi);
659
660 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
661 hdmi->mmio = devm_ioremap_resource(dev, res);
662 if (IS_ERR(hdmi->mmio)) {
663 ret = PTR_ERR(hdmi->mmio);
664 DRM_DEV_ERROR(dev, "failed to remap hdmi region: %d\n", ret);
665 return ret;
666 }
667
668 irq = platform_get_irq(pdev, 0);
669 if (irq < 0)
670 return irq;
671
672 hdmi->cec_clk = devm_clk_get(hdmi->dev, "osc_cec");
673 if (IS_ERR(hdmi->cec_clk)) {
674 ret = PTR_ERR(hdmi->cec_clk);
675 DRM_DEV_ERROR(dev, "failed to get cec_clk: %d\n", ret);
676 return ret;
677 }
678
679 hdmi->osc_clk = devm_clk_get(hdmi->dev, "osc_clk");
680 if (IS_ERR(hdmi->osc_clk)) {
681 ret = PTR_ERR(hdmi->osc_clk);
682 DRM_DEV_ERROR(dev, "failed to get osc_clk: %d\n", ret);
683 return ret;
684 }
685
686 hdmi->xclk = devm_clk_get(hdmi->dev, "xclk");
687 if (IS_ERR(hdmi->xclk)) {
688 ret = PTR_ERR(hdmi->xclk);
689 DRM_DEV_ERROR(dev, "failed to get xclk: %d\n", ret);
690 return ret;
691 }
692
693 ret = zx_hdmi_ddc_register(hdmi);
694 if (ret) {
695 DRM_DEV_ERROR(dev, "failed to register ddc: %d\n", ret);
696 return ret;
697 }
698
699 ret = zx_hdmi_audio_register(hdmi);
700 if (ret) {
701 DRM_DEV_ERROR(dev, "failed to register audio: %d\n", ret);
702 return ret;
703 }
704
705 ret = zx_hdmi_register(drm, hdmi);
706 if (ret) {
707 DRM_DEV_ERROR(dev, "failed to register hdmi: %d\n", ret);
708 return ret;
709 }
710
711 ret = devm_request_threaded_irq(dev, irq, zx_hdmi_irq_handler,
712 zx_hdmi_irq_thread, IRQF_SHARED,
713 dev_name(dev), hdmi);
714 if (ret) {
715 DRM_DEV_ERROR(dev, "failed to request threaded irq: %d\n", ret);
716 return ret;
717 }
718
719 return 0;
720}
721
722static void zx_hdmi_unbind(struct device *dev, struct device *master,
723 void *data)
724{
725 struct zx_hdmi *hdmi = dev_get_drvdata(dev);
726
727 hdmi->connector.funcs->destroy(&hdmi->connector);
728 hdmi->encoder.funcs->destroy(&hdmi->encoder);
729
730 if (hdmi->audio_pdev)
731 platform_device_unregister(hdmi->audio_pdev);
732}
733
734static const struct component_ops zx_hdmi_component_ops = {
735 .bind = zx_hdmi_bind,
736 .unbind = zx_hdmi_unbind,
737};
738
739static int zx_hdmi_probe(struct platform_device *pdev)
740{
741 return component_add(&pdev->dev, &zx_hdmi_component_ops);
742}
743
744static int zx_hdmi_remove(struct platform_device *pdev)
745{
746 component_del(&pdev->dev, &zx_hdmi_component_ops);
747 return 0;
748}
749
750static const struct of_device_id zx_hdmi_of_match[] = {
751 { .compatible = "zte,zx296718-hdmi", },
752 { /* end */ },
753};
754MODULE_DEVICE_TABLE(of, zx_hdmi_of_match);
755
756struct platform_driver zx_hdmi_driver = {
757 .probe = zx_hdmi_probe,
758 .remove = zx_hdmi_remove,
759 .driver = {
760 .name = "zx-hdmi",
761 .of_match_table = zx_hdmi_of_match,
762 },
763};