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15#include <drm/drmP.h>
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drm_dp_helper.h>
19#include <drm/drm_edid.h>
20#include <drm/drm_of.h>
21
22#include <linux/clk.h>
23#include <linux/component.h>
24#include <linux/extcon.h>
25#include <linux/firmware.h>
26#include <linux/regmap.h>
27#include <linux/reset.h>
28#include <linux/mfd/syscon.h>
29#include <linux/phy/phy.h>
30
31#include <sound/hdmi-codec.h>
32
33#include "cdn-dp-core.h"
34#include "cdn-dp-reg.h"
35#include "rockchip_drm_vop.h"
36
37#define connector_to_dp(c) \
38 container_of(c, struct cdn_dp_device, connector)
39
40#define encoder_to_dp(c) \
41 container_of(c, struct cdn_dp_device, encoder)
42
43#define GRF_SOC_CON9 0x6224
44#define DP_SEL_VOP_LIT BIT(12)
45#define GRF_SOC_CON26 0x6268
46#define UPHY_SEL_BIT 3
47#define UPHY_SEL_MASK BIT(19)
48#define DPTX_HPD_SEL (3 << 12)
49#define DPTX_HPD_DEL (2 << 12)
50#define DPTX_HPD_SEL_MASK (3 << 28)
51
52#define CDN_FW_TIMEOUT_MS (64 * 1000)
53#define CDN_DPCD_TIMEOUT_MS 5000
54#define CDN_DP_FIRMWARE "rockchip/dptx.bin"
55
56struct cdn_dp_data {
57 u8 max_phy;
58};
59
60struct cdn_dp_data rk3399_cdn_dp = {
61 .max_phy = 2,
62};
63
64static const struct of_device_id cdn_dp_dt_ids[] = {
65 { .compatible = "rockchip,rk3399-cdn-dp",
66 .data = (void *)&rk3399_cdn_dp },
67 {}
68};
69
70MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
71
72static int cdn_dp_grf_write(struct cdn_dp_device *dp,
73 unsigned int reg, unsigned int val)
74{
75 int ret;
76
77 ret = clk_prepare_enable(dp->grf_clk);
78 if (ret) {
79 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
80 return ret;
81 }
82
83 ret = regmap_write(dp->grf, reg, val);
84 if (ret) {
85 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
86 return ret;
87 }
88
89 clk_disable_unprepare(dp->grf_clk);
90
91 return 0;
92}
93
94static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
95{
96 int ret;
97 unsigned long rate;
98
99 ret = clk_prepare_enable(dp->pclk);
100 if (ret < 0) {
101 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
102 goto err_pclk;
103 }
104
105 ret = clk_prepare_enable(dp->core_clk);
106 if (ret < 0) {
107 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
108 goto err_core_clk;
109 }
110
111 ret = pm_runtime_get_sync(dp->dev);
112 if (ret < 0) {
113 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
114 goto err_pm_runtime_get;
115 }
116
117 reset_control_assert(dp->core_rst);
118 reset_control_assert(dp->dptx_rst);
119 reset_control_assert(dp->apb_rst);
120 reset_control_deassert(dp->core_rst);
121 reset_control_deassert(dp->dptx_rst);
122 reset_control_deassert(dp->apb_rst);
123
124 rate = clk_get_rate(dp->core_clk);
125 if (!rate) {
126 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
127 ret = -EINVAL;
128 goto err_set_rate;
129 }
130
131 cdn_dp_set_fw_clk(dp, rate);
132 cdn_dp_clock_reset(dp);
133
134 return 0;
135
136err_set_rate:
137 pm_runtime_put(dp->dev);
138err_pm_runtime_get:
139 clk_disable_unprepare(dp->core_clk);
140err_core_clk:
141 clk_disable_unprepare(dp->pclk);
142err_pclk:
143 return ret;
144}
145
146static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
147{
148 pm_runtime_put_sync(dp->dev);
149 clk_disable_unprepare(dp->pclk);
150 clk_disable_unprepare(dp->core_clk);
151}
152
153static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
154{
155 struct extcon_dev *edev = port->extcon;
156 union extcon_property_value property;
157 int dptx;
158 u8 lanes;
159
160 dptx = extcon_get_state(edev, EXTCON_DISP_DP);
161 if (dptx > 0) {
162 extcon_get_property(edev, EXTCON_DISP_DP,
163 EXTCON_PROP_USB_SS, &property);
164 if (property.intval)
165 lanes = 2;
166 else
167 lanes = 4;
168 } else {
169 lanes = 0;
170 }
171
172 return lanes;
173}
174
175static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
176{
177 int ret;
178 u8 value;
179
180 *sink_count = 0;
181 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
182 if (ret)
183 return ret;
184
185 *sink_count = DP_GET_SINK_COUNT(value);
186 return 0;
187}
188
189static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
190{
191 struct cdn_dp_port *port;
192 int i, lanes;
193
194 for (i = 0; i < dp->ports; i++) {
195 port = dp->port[i];
196 lanes = cdn_dp_get_port_lanes(port);
197 if (lanes)
198 return port;
199 }
200 return NULL;
201}
202
203static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
204{
205 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
206 struct cdn_dp_port *port;
207 u8 sink_count = 0;
208
209 if (dp->active_port < 0 || dp->active_port >= dp->ports) {
210 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
211 return false;
212 }
213
214 port = dp->port[dp->active_port];
215
216
217
218
219
220
221
222 while (time_before(jiffies, timeout)) {
223 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
224 return false;
225
226 if (!cdn_dp_get_sink_count(dp, &sink_count))
227 return sink_count ? true : false;
228
229 usleep_range(5000, 10000);
230 }
231
232 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
233 return false;
234}
235
236static enum drm_connector_status
237cdn_dp_connector_detect(struct drm_connector *connector, bool force)
238{
239 struct cdn_dp_device *dp = connector_to_dp(connector);
240 enum drm_connector_status status = connector_status_disconnected;
241
242 mutex_lock(&dp->lock);
243 if (dp->connected)
244 status = connector_status_connected;
245 mutex_unlock(&dp->lock);
246
247 return status;
248}
249
250static void cdn_dp_connector_destroy(struct drm_connector *connector)
251{
252 drm_connector_unregister(connector);
253 drm_connector_cleanup(connector);
254}
255
256static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
257 .dpms = drm_atomic_helper_connector_dpms,
258 .detect = cdn_dp_connector_detect,
259 .destroy = cdn_dp_connector_destroy,
260 .fill_modes = drm_helper_probe_single_connector_modes,
261 .reset = drm_atomic_helper_connector_reset,
262 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
263 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
264};
265
266static int cdn_dp_connector_get_modes(struct drm_connector *connector)
267{
268 struct cdn_dp_device *dp = connector_to_dp(connector);
269 struct edid *edid;
270 int ret = 0;
271
272 mutex_lock(&dp->lock);
273 edid = dp->edid;
274 if (edid) {
275 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
276 edid->width_cm, edid->height_cm);
277
278 dp->sink_has_audio = drm_detect_monitor_audio(edid);
279 ret = drm_add_edid_modes(connector, edid);
280 if (ret) {
281 drm_mode_connector_update_edid_property(connector,
282 edid);
283 drm_edid_to_eld(connector, edid);
284 }
285 }
286 mutex_unlock(&dp->lock);
287
288 return ret;
289}
290
291static struct drm_encoder *
292cdn_dp_connector_best_encoder(struct drm_connector *connector)
293{
294 struct cdn_dp_device *dp = connector_to_dp(connector);
295
296 return &dp->encoder;
297}
298
299static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
300 struct drm_display_mode *mode)
301{
302 struct cdn_dp_device *dp = connector_to_dp(connector);
303 struct drm_display_info *display_info = &dp->connector.display_info;
304 u32 requested, actual, rate, sink_max, source_max = 0;
305 u8 lanes, bpc;
306
307
308 if (!dp->connected)
309 return MODE_BAD;
310
311 switch (display_info->bpc) {
312 case 10:
313 bpc = 10;
314 break;
315 case 6:
316 bpc = 6;
317 break;
318 default:
319 bpc = 8;
320 break;
321 }
322
323 requested = mode->clock * bpc * 3 / 1000;
324
325 source_max = dp->lanes;
326 sink_max = drm_dp_max_lane_count(dp->dpcd);
327 lanes = min(source_max, sink_max);
328
329 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
330 sink_max = drm_dp_max_link_rate(dp->dpcd);
331 rate = min(source_max, sink_max);
332
333 actual = rate * lanes / 100;
334
335
336 actual = actual * 8 / 10;
337
338 if (requested > actual) {
339 DRM_DEV_DEBUG_KMS(dp->dev,
340 "requested=%d, actual=%d, clock=%d\n",
341 requested, actual, mode->clock);
342 return MODE_CLOCK_HIGH;
343 }
344
345 return MODE_OK;
346}
347
348static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
349 .get_modes = cdn_dp_connector_get_modes,
350 .best_encoder = cdn_dp_connector_best_encoder,
351 .mode_valid = cdn_dp_connector_mode_valid,
352};
353
354static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
355{
356 int ret;
357 const u32 *iram_data, *dram_data;
358 const struct firmware *fw = dp->fw;
359 const struct cdn_firmware_header *hdr;
360
361 hdr = (struct cdn_firmware_header *)fw->data;
362 if (fw->size != le32_to_cpu(hdr->size_bytes)) {
363 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
364 return -EINVAL;
365 }
366
367 iram_data = (const u32 *)(fw->data + hdr->header_size);
368 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
369
370 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
371 dram_data, hdr->dram_size);
372 if (ret)
373 return ret;
374
375 ret = cdn_dp_set_firmware_active(dp, true);
376 if (ret) {
377 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
378 return ret;
379 }
380
381 return cdn_dp_event_config(dp);
382}
383
384static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
385{
386 int ret;
387
388 if (!cdn_dp_check_sink_connection(dp))
389 return -ENODEV;
390
391 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
392 DP_RECEIVER_CAP_SIZE);
393 if (ret) {
394 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
395 return ret;
396 }
397
398 kfree(dp->edid);
399 dp->edid = drm_do_get_edid(&dp->connector,
400 cdn_dp_get_edid_block, dp);
401 return 0;
402}
403
404static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
405{
406 union extcon_property_value property;
407 int ret;
408
409 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
410 (port->id << UPHY_SEL_BIT) | UPHY_SEL_MASK);
411 if (ret)
412 return ret;
413
414 if (!port->phy_enabled) {
415 ret = phy_power_on(port->phy);
416 if (ret) {
417 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
418 ret);
419 goto err_phy;
420 }
421 port->phy_enabled = true;
422 }
423
424 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
425 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
426 if (ret) {
427 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
428 goto err_power_on;
429 }
430
431 ret = cdn_dp_get_hpd_status(dp);
432 if (ret <= 0) {
433 if (!ret)
434 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
435 goto err_power_on;
436 }
437
438 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
439 EXTCON_PROP_USB_TYPEC_POLARITY, &property);
440 if (ret) {
441 DRM_DEV_ERROR(dp->dev, "get property failed\n");
442 goto err_power_on;
443 }
444
445 port->lanes = cdn_dp_get_port_lanes(port);
446 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
447 if (ret) {
448 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
449 ret);
450 goto err_power_on;
451 }
452
453 dp->active_port = port->id;
454 return 0;
455
456err_power_on:
457 if (phy_power_off(port->phy))
458 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
459 else
460 port->phy_enabled = false;
461
462err_phy:
463 cdn_dp_grf_write(dp, GRF_SOC_CON26,
464 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
465 return ret;
466}
467
468static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
469 struct cdn_dp_port *port)
470{
471 int ret;
472
473 if (port->phy_enabled) {
474 ret = phy_power_off(port->phy);
475 if (ret) {
476 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
477 return ret;
478 }
479 }
480
481 port->phy_enabled = false;
482 port->lanes = 0;
483 dp->active_port = -1;
484 return 0;
485}
486
487static int cdn_dp_disable(struct cdn_dp_device *dp)
488{
489 int ret, i;
490
491 if (!dp->active)
492 return 0;
493
494 for (i = 0; i < dp->ports; i++)
495 cdn_dp_disable_phy(dp, dp->port[i]);
496
497 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
498 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
499 if (ret) {
500 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
501 ret);
502 return ret;
503 }
504
505 cdn_dp_set_firmware_active(dp, false);
506 cdn_dp_clk_disable(dp);
507 dp->active = false;
508 dp->link.rate = 0;
509 dp->link.num_lanes = 0;
510 if (!dp->connected) {
511 kfree(dp->edid);
512 dp->edid = NULL;
513 }
514
515 return 0;
516}
517
518static int cdn_dp_enable(struct cdn_dp_device *dp)
519{
520 int ret, i, lanes;
521 struct cdn_dp_port *port;
522
523 port = cdn_dp_connected_port(dp);
524 if (!port) {
525 DRM_DEV_ERROR(dp->dev,
526 "Can't enable without connection\n");
527 return -ENODEV;
528 }
529
530 if (dp->active)
531 return 0;
532
533 ret = cdn_dp_clk_enable(dp);
534 if (ret)
535 return ret;
536
537 ret = cdn_dp_firmware_init(dp);
538 if (ret) {
539 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
540 goto err_clk_disable;
541 }
542
543
544 for (i = port->id; i < dp->ports; i++) {
545 port = dp->port[i];
546 lanes = cdn_dp_get_port_lanes(port);
547 if (lanes) {
548 ret = cdn_dp_enable_phy(dp, port);
549 if (ret)
550 continue;
551
552 ret = cdn_dp_get_sink_capability(dp);
553 if (ret) {
554 cdn_dp_disable_phy(dp, port);
555 } else {
556 dp->active = true;
557 dp->lanes = port->lanes;
558 return 0;
559 }
560 }
561 }
562
563err_clk_disable:
564 cdn_dp_clk_disable(dp);
565 return ret;
566}
567
568static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
569 struct drm_display_mode *mode,
570 struct drm_display_mode *adjusted)
571{
572 struct cdn_dp_device *dp = encoder_to_dp(encoder);
573 struct drm_display_info *display_info = &dp->connector.display_info;
574 struct video_info *video = &dp->video_info;
575
576 switch (display_info->bpc) {
577 case 10:
578 video->color_depth = 10;
579 break;
580 case 6:
581 video->color_depth = 6;
582 break;
583 default:
584 video->color_depth = 8;
585 break;
586 }
587
588 video->color_fmt = PXL_RGB;
589 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
590 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
591
592 memcpy(&dp->mode, adjusted, sizeof(*mode));
593}
594
595static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
596{
597 u8 link_status[DP_LINK_STATUS_SIZE];
598 struct cdn_dp_port *port = cdn_dp_connected_port(dp);
599 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
600
601 if (!port || !dp->link.rate || !dp->link.num_lanes)
602 return false;
603
604 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
605 DP_LINK_STATUS_SIZE)) {
606 DRM_ERROR("Failed to get link status\n");
607 return false;
608 }
609
610
611 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
612}
613
614static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
615{
616 struct cdn_dp_device *dp = encoder_to_dp(encoder);
617 int ret, val;
618
619 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
620 if (ret < 0) {
621 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
622 return;
623 }
624
625 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
626 (ret) ? "LIT" : "BIG");
627 if (ret)
628 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
629 else
630 val = DP_SEL_VOP_LIT << 16;
631
632 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
633 if (ret)
634 return;
635
636 mutex_lock(&dp->lock);
637
638 ret = cdn_dp_enable(dp);
639 if (ret) {
640 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
641 ret);
642 goto out;
643 }
644 if (!cdn_dp_check_link_status(dp)) {
645 ret = cdn_dp_train_link(dp);
646 if (ret) {
647 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
648 goto out;
649 }
650 }
651
652 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
653 if (ret) {
654 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
655 goto out;
656 }
657
658 ret = cdn_dp_config_video(dp);
659 if (ret) {
660 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
661 goto out;
662 }
663
664 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
665 if (ret) {
666 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
667 goto out;
668 }
669out:
670 mutex_unlock(&dp->lock);
671}
672
673static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
674{
675 struct cdn_dp_device *dp = encoder_to_dp(encoder);
676 int ret;
677
678 mutex_lock(&dp->lock);
679 if (dp->active) {
680 ret = cdn_dp_disable(dp);
681 if (ret) {
682 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
683 ret);
684 }
685 }
686 mutex_unlock(&dp->lock);
687
688
689
690
691
692
693
694
695
696
697 if (!dp->connected && cdn_dp_connected_port(dp))
698 schedule_work(&dp->event_work);
699}
700
701static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
702 struct drm_crtc_state *crtc_state,
703 struct drm_connector_state *conn_state)
704{
705 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
706
707 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
708 s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
709
710 return 0;
711}
712
713static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
714 .mode_set = cdn_dp_encoder_mode_set,
715 .enable = cdn_dp_encoder_enable,
716 .disable = cdn_dp_encoder_disable,
717 .atomic_check = cdn_dp_encoder_atomic_check,
718};
719
720static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
721 .destroy = drm_encoder_cleanup,
722};
723
724static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
725{
726 struct device *dev = dp->dev;
727 struct device_node *np = dev->of_node;
728 struct platform_device *pdev = to_platform_device(dev);
729 struct resource *res;
730
731 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
732 if (IS_ERR(dp->grf)) {
733 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
734 return PTR_ERR(dp->grf);
735 }
736
737 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
738 dp->regs = devm_ioremap_resource(dev, res);
739 if (IS_ERR(dp->regs)) {
740 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
741 return PTR_ERR(dp->regs);
742 }
743
744 dp->core_clk = devm_clk_get(dev, "core-clk");
745 if (IS_ERR(dp->core_clk)) {
746 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
747 return PTR_ERR(dp->core_clk);
748 }
749
750 dp->pclk = devm_clk_get(dev, "pclk");
751 if (IS_ERR(dp->pclk)) {
752 DRM_DEV_ERROR(dev, "cannot get pclk\n");
753 return PTR_ERR(dp->pclk);
754 }
755
756 dp->spdif_clk = devm_clk_get(dev, "spdif");
757 if (IS_ERR(dp->spdif_clk)) {
758 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
759 return PTR_ERR(dp->spdif_clk);
760 }
761
762 dp->grf_clk = devm_clk_get(dev, "grf");
763 if (IS_ERR(dp->grf_clk)) {
764 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
765 return PTR_ERR(dp->grf_clk);
766 }
767
768 dp->spdif_rst = devm_reset_control_get(dev, "spdif");
769 if (IS_ERR(dp->spdif_rst)) {
770 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
771 return PTR_ERR(dp->spdif_rst);
772 }
773
774 dp->dptx_rst = devm_reset_control_get(dev, "dptx");
775 if (IS_ERR(dp->dptx_rst)) {
776 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
777 return PTR_ERR(dp->dptx_rst);
778 }
779
780 dp->core_rst = devm_reset_control_get(dev, "core");
781 if (IS_ERR(dp->core_rst)) {
782 DRM_DEV_ERROR(dev, "no core reset control found\n");
783 return PTR_ERR(dp->core_rst);
784 }
785
786 dp->apb_rst = devm_reset_control_get(dev, "apb");
787 if (IS_ERR(dp->apb_rst)) {
788 DRM_DEV_ERROR(dev, "no apb reset control found\n");
789 return PTR_ERR(dp->apb_rst);
790 }
791
792 return 0;
793}
794
795static int cdn_dp_audio_hw_params(struct device *dev, void *data,
796 struct hdmi_codec_daifmt *daifmt,
797 struct hdmi_codec_params *params)
798{
799 struct cdn_dp_device *dp = dev_get_drvdata(dev);
800 struct audio_info audio = {
801 .sample_width = params->sample_width,
802 .sample_rate = params->sample_rate,
803 .channels = params->channels,
804 };
805 int ret;
806
807 mutex_lock(&dp->lock);
808 if (!dp->active) {
809 ret = -ENODEV;
810 goto out;
811 }
812
813 switch (daifmt->fmt) {
814 case HDMI_I2S:
815 audio.format = AFMT_I2S;
816 break;
817 case HDMI_SPDIF:
818 audio.format = AFMT_SPDIF;
819 break;
820 default:
821 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
822 ret = -EINVAL;
823 goto out;
824 }
825
826 ret = cdn_dp_audio_config(dp, &audio);
827 if (!ret)
828 dp->audio_info = audio;
829
830out:
831 mutex_unlock(&dp->lock);
832 return ret;
833}
834
835static void cdn_dp_audio_shutdown(struct device *dev, void *data)
836{
837 struct cdn_dp_device *dp = dev_get_drvdata(dev);
838 int ret;
839
840 mutex_lock(&dp->lock);
841 if (!dp->active)
842 goto out;
843
844 ret = cdn_dp_audio_stop(dp, &dp->audio_info);
845 if (!ret)
846 dp->audio_info.format = AFMT_UNUSED;
847out:
848 mutex_unlock(&dp->lock);
849}
850
851static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
852 bool enable)
853{
854 struct cdn_dp_device *dp = dev_get_drvdata(dev);
855 int ret;
856
857 mutex_lock(&dp->lock);
858 if (!dp->active) {
859 ret = -ENODEV;
860 goto out;
861 }
862
863 ret = cdn_dp_audio_mute(dp, enable);
864
865out:
866 mutex_unlock(&dp->lock);
867 return ret;
868}
869
870static int cdn_dp_audio_get_eld(struct device *dev, void *data,
871 u8 *buf, size_t len)
872{
873 struct cdn_dp_device *dp = dev_get_drvdata(dev);
874
875 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
876
877 return 0;
878}
879
880static const struct hdmi_codec_ops audio_codec_ops = {
881 .hw_params = cdn_dp_audio_hw_params,
882 .audio_shutdown = cdn_dp_audio_shutdown,
883 .digital_mute = cdn_dp_audio_digital_mute,
884 .get_eld = cdn_dp_audio_get_eld,
885};
886
887static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
888 struct device *dev)
889{
890 struct hdmi_codec_pdata codec_data = {
891 .i2s = 1,
892 .spdif = 1,
893 .ops = &audio_codec_ops,
894 .max_i2s_channels = 8,
895 };
896
897 dp->audio_pdev = platform_device_register_data(
898 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
899 &codec_data, sizeof(codec_data));
900
901 return PTR_ERR_OR_ZERO(dp->audio_pdev);
902}
903
904static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
905{
906 int ret;
907 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
908 unsigned long sleep = 1000;
909
910 WARN_ON(!mutex_is_locked(&dp->lock));
911
912 if (dp->fw_loaded)
913 return 0;
914
915
916 mutex_unlock(&dp->lock);
917
918 while (time_before(jiffies, timeout)) {
919 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
920 if (ret == -ENOENT) {
921 msleep(sleep);
922 sleep *= 2;
923 continue;
924 } else if (ret) {
925 DRM_DEV_ERROR(dp->dev,
926 "failed to request firmware: %d\n", ret);
927 goto out;
928 }
929
930 dp->fw_loaded = true;
931 ret = 0;
932 goto out;
933 }
934
935 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
936 ret = -ETIMEDOUT;
937out:
938 mutex_lock(&dp->lock);
939 return ret;
940}
941
942static void cdn_dp_pd_event_work(struct work_struct *work)
943{
944 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
945 event_work);
946 struct drm_connector *connector = &dp->connector;
947 enum drm_connector_status old_status;
948
949 int ret;
950
951 mutex_lock(&dp->lock);
952
953 if (dp->suspended)
954 goto out;
955
956 ret = cdn_dp_request_firmware(dp);
957 if (ret)
958 goto out;
959
960 dp->connected = true;
961
962
963 if (!cdn_dp_connected_port(dp)) {
964 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
965 dp->connected = false;
966
967
968 } else if (!dp->active) {
969 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
970 ret = cdn_dp_enable(dp);
971 if (ret) {
972 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
973 dp->connected = false;
974 }
975
976
977 } else if (!cdn_dp_check_sink_connection(dp)) {
978 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
979 dp->connected = false;
980
981
982 } else if (!cdn_dp_check_link_status(dp)) {
983 unsigned int rate = dp->link.rate;
984 unsigned int lanes = dp->link.num_lanes;
985 struct drm_display_mode *mode = &dp->mode;
986
987 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
988 ret = cdn_dp_train_link(dp);
989 if (ret) {
990 dp->connected = false;
991 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
992 goto out;
993 }
994
995
996 if (mode->clock &&
997 (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
998 ret = cdn_dp_config_video(dp);
999 if (ret) {
1000 dp->connected = false;
1001 DRM_DEV_ERROR(dp->dev,
1002 "Failed to config video %d\n",
1003 ret);
1004 }
1005 }
1006 }
1007
1008out:
1009 mutex_unlock(&dp->lock);
1010
1011 old_status = connector->status;
1012 connector->status = connector->funcs->detect(connector, false);
1013 if (old_status != connector->status)
1014 drm_kms_helper_hotplug_event(dp->drm_dev);
1015}
1016
1017static int cdn_dp_pd_event(struct notifier_block *nb,
1018 unsigned long event, void *priv)
1019{
1020 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1021 event_nb);
1022 struct cdn_dp_device *dp = port->dp;
1023
1024
1025
1026
1027
1028
1029 schedule_work(&dp->event_work);
1030
1031 return NOTIFY_DONE;
1032}
1033
1034static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1035{
1036 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1037 struct drm_encoder *encoder;
1038 struct drm_connector *connector;
1039 struct cdn_dp_port *port;
1040 struct drm_device *drm_dev = data;
1041 int ret, i;
1042
1043 ret = cdn_dp_parse_dt(dp);
1044 if (ret < 0)
1045 return ret;
1046
1047 dp->drm_dev = drm_dev;
1048 dp->connected = false;
1049 dp->active = false;
1050 dp->active_port = -1;
1051 dp->fw_loaded = false;
1052
1053 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1054
1055 encoder = &dp->encoder;
1056
1057 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1058 dev->of_node);
1059 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1060
1061 ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1062 DRM_MODE_ENCODER_TMDS, NULL);
1063 if (ret) {
1064 DRM_ERROR("failed to initialize encoder with drm\n");
1065 return ret;
1066 }
1067
1068 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1069
1070 connector = &dp->connector;
1071 connector->polled = DRM_CONNECTOR_POLL_HPD;
1072 connector->dpms = DRM_MODE_DPMS_OFF;
1073
1074 ret = drm_connector_init(drm_dev, connector,
1075 &cdn_dp_atomic_connector_funcs,
1076 DRM_MODE_CONNECTOR_DisplayPort);
1077 if (ret) {
1078 DRM_ERROR("failed to initialize connector with drm\n");
1079 goto err_free_encoder;
1080 }
1081
1082 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1083
1084 ret = drm_mode_connector_attach_encoder(connector, encoder);
1085 if (ret) {
1086 DRM_ERROR("failed to attach connector and encoder\n");
1087 goto err_free_connector;
1088 }
1089
1090 for (i = 0; i < dp->ports; i++) {
1091 port = dp->port[i];
1092
1093 port->event_nb.notifier_call = cdn_dp_pd_event;
1094 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1095 EXTCON_DISP_DP,
1096 &port->event_nb);
1097 if (ret) {
1098 DRM_DEV_ERROR(dev,
1099 "register EXTCON_DISP_DP notifier err\n");
1100 goto err_free_connector;
1101 }
1102 }
1103
1104 pm_runtime_enable(dev);
1105
1106 schedule_work(&dp->event_work);
1107
1108 return 0;
1109
1110err_free_connector:
1111 drm_connector_cleanup(connector);
1112err_free_encoder:
1113 drm_encoder_cleanup(encoder);
1114 return ret;
1115}
1116
1117static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1118{
1119 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1120 struct drm_encoder *encoder = &dp->encoder;
1121 struct drm_connector *connector = &dp->connector;
1122
1123 cancel_work_sync(&dp->event_work);
1124 cdn_dp_encoder_disable(encoder);
1125 encoder->funcs->destroy(encoder);
1126 connector->funcs->destroy(connector);
1127
1128 pm_runtime_disable(dev);
1129 if (dp->fw_loaded)
1130 release_firmware(dp->fw);
1131 kfree(dp->edid);
1132 dp->edid = NULL;
1133}
1134
1135static const struct component_ops cdn_dp_component_ops = {
1136 .bind = cdn_dp_bind,
1137 .unbind = cdn_dp_unbind,
1138};
1139
1140int cdn_dp_suspend(struct device *dev)
1141{
1142 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1143 int ret = 0;
1144
1145 mutex_lock(&dp->lock);
1146 if (dp->active)
1147 ret = cdn_dp_disable(dp);
1148 dp->suspended = true;
1149 mutex_unlock(&dp->lock);
1150
1151 return ret;
1152}
1153
1154int cdn_dp_resume(struct device *dev)
1155{
1156 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1157
1158 mutex_lock(&dp->lock);
1159 dp->suspended = false;
1160 if (dp->fw_loaded)
1161 schedule_work(&dp->event_work);
1162 mutex_unlock(&dp->lock);
1163
1164 return 0;
1165}
1166
1167static int cdn_dp_probe(struct platform_device *pdev)
1168{
1169 struct device *dev = &pdev->dev;
1170 const struct of_device_id *match;
1171 struct cdn_dp_data *dp_data;
1172 struct cdn_dp_port *port;
1173 struct cdn_dp_device *dp;
1174 struct extcon_dev *extcon;
1175 struct phy *phy;
1176 int i;
1177
1178 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1179 if (!dp)
1180 return -ENOMEM;
1181 dp->dev = dev;
1182
1183 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1184 dp_data = (struct cdn_dp_data *)match->data;
1185
1186 for (i = 0; i < dp_data->max_phy; i++) {
1187 extcon = extcon_get_edev_by_phandle(dev, i);
1188 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1189
1190 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1191 PTR_ERR(phy) == -EPROBE_DEFER)
1192 return -EPROBE_DEFER;
1193
1194 if (IS_ERR(extcon) || IS_ERR(phy))
1195 continue;
1196
1197 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1198 if (!port)
1199 return -ENOMEM;
1200
1201 port->extcon = extcon;
1202 port->phy = phy;
1203 port->dp = dp;
1204 port->id = i;
1205 dp->port[dp->ports++] = port;
1206 }
1207
1208 if (!dp->ports) {
1209 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1210 return -EINVAL;
1211 }
1212
1213 mutex_init(&dp->lock);
1214 dev_set_drvdata(dev, dp);
1215
1216 cdn_dp_audio_codec_init(dp, dev);
1217
1218 return component_add(dev, &cdn_dp_component_ops);
1219}
1220
1221static int cdn_dp_remove(struct platform_device *pdev)
1222{
1223 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1224
1225 platform_device_unregister(dp->audio_pdev);
1226 cdn_dp_suspend(dp->dev);
1227 component_del(&pdev->dev, &cdn_dp_component_ops);
1228
1229 return 0;
1230}
1231
1232static void cdn_dp_shutdown(struct platform_device *pdev)
1233{
1234 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1235
1236 cdn_dp_suspend(dp->dev);
1237}
1238
1239static const struct dev_pm_ops cdn_dp_pm_ops = {
1240 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1241 cdn_dp_resume)
1242};
1243
1244struct platform_driver cdn_dp_driver = {
1245 .probe = cdn_dp_probe,
1246 .remove = cdn_dp_remove,
1247 .shutdown = cdn_dp_shutdown,
1248 .driver = {
1249 .name = "cdn-dp",
1250 .owner = THIS_MODULE,
1251 .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1252 .pm = &cdn_dp_pm_ops,
1253 },
1254};
1255
