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