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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author: Chris Zhong <zyw@rock-chips.com>
5 */
6
7#include <linux/clk.h>
8#include <linux/component.h>
9#include <linux/extcon.h>
10#include <linux/firmware.h>
11#include <linux/mfd/syscon.h>
12#include <linux/phy/phy.h>
13#include <linux/regmap.h>
14#include <linux/reset.h>
15
16#include <sound/hdmi-codec.h>
17
18#include <drm/display/drm_dp_helper.h>
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_edid.h>
21#include <drm/drm_of.h>
22#include <drm/drm_probe_helper.h>
23#include <drm/drm_simple_kms_helper.h>
24
25#include "cdn-dp-core.h"
26#include "cdn-dp-reg.h"
27
28static inline struct cdn_dp_device *connector_to_dp(struct drm_connector *connector)
29{
30 return container_of(connector, struct cdn_dp_device, connector);
31}
32
33static inline struct cdn_dp_device *encoder_to_dp(struct drm_encoder *encoder)
34{
35 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
36
37 return container_of(rkencoder, struct cdn_dp_device, encoder);
38}
39
40#define GRF_SOC_CON9 0x6224
41#define DP_SEL_VOP_LIT BIT(12)
42#define GRF_SOC_CON26 0x6268
43#define DPTX_HPD_SEL (3 << 12)
44#define DPTX_HPD_DEL (2 << 12)
45#define DPTX_HPD_SEL_MASK (3 << 28)
46
47#define CDN_FW_TIMEOUT_MS (64 * 1000)
48#define CDN_DPCD_TIMEOUT_MS 5000
49#define CDN_DP_FIRMWARE "rockchip/dptx.bin"
50MODULE_FIRMWARE(CDN_DP_FIRMWARE);
51
52struct cdn_dp_data {
53 u8 max_phy;
54};
55
56static struct cdn_dp_data rk3399_cdn_dp = {
57 .max_phy = 2,
58};
59
60static const struct of_device_id cdn_dp_dt_ids[] = {
61 { .compatible = "rockchip,rk3399-cdn-dp",
62 .data = (void *)&rk3399_cdn_dp },
63 {}
64};
65
66MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
67
68static int cdn_dp_grf_write(struct cdn_dp_device *dp,
69 unsigned int reg, unsigned int val)
70{
71 int ret;
72
73 ret = clk_prepare_enable(dp->grf_clk);
74 if (ret) {
75 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
76 return ret;
77 }
78
79 ret = regmap_write(dp->grf, reg, val);
80 if (ret) {
81 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
82 clk_disable_unprepare(dp->grf_clk);
83 return ret;
84 }
85
86 clk_disable_unprepare(dp->grf_clk);
87
88 return 0;
89}
90
91static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
92{
93 int ret;
94 unsigned long rate;
95
96 ret = clk_prepare_enable(dp->pclk);
97 if (ret < 0) {
98 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
99 goto err_pclk;
100 }
101
102 ret = clk_prepare_enable(dp->core_clk);
103 if (ret < 0) {
104 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
105 goto err_core_clk;
106 }
107
108 ret = pm_runtime_get_sync(dp->dev);
109 if (ret < 0) {
110 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
111 goto err_pm_runtime_get;
112 }
113
114 reset_control_assert(dp->core_rst);
115 reset_control_assert(dp->dptx_rst);
116 reset_control_assert(dp->apb_rst);
117 reset_control_deassert(dp->core_rst);
118 reset_control_deassert(dp->dptx_rst);
119 reset_control_deassert(dp->apb_rst);
120
121 rate = clk_get_rate(dp->core_clk);
122 if (!rate) {
123 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
124 ret = -EINVAL;
125 goto err_set_rate;
126 }
127
128 cdn_dp_set_fw_clk(dp, rate);
129 cdn_dp_clock_reset(dp);
130
131 return 0;
132
133err_set_rate:
134 pm_runtime_put(dp->dev);
135err_pm_runtime_get:
136 clk_disable_unprepare(dp->core_clk);
137err_core_clk:
138 clk_disable_unprepare(dp->pclk);
139err_pclk:
140 return ret;
141}
142
143static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
144{
145 pm_runtime_put_sync(dp->dev);
146 clk_disable_unprepare(dp->pclk);
147 clk_disable_unprepare(dp->core_clk);
148}
149
150static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
151{
152 struct extcon_dev *edev = port->extcon;
153 union extcon_property_value property;
154 int dptx;
155 u8 lanes;
156
157 dptx = extcon_get_state(edev, EXTCON_DISP_DP);
158 if (dptx > 0) {
159 extcon_get_property(edev, EXTCON_DISP_DP,
160 EXTCON_PROP_USB_SS, &property);
161 if (property.intval)
162 lanes = 2;
163 else
164 lanes = 4;
165 } else {
166 lanes = 0;
167 }
168
169 return lanes;
170}
171
172static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
173{
174 int ret;
175 u8 value;
176
177 *sink_count = 0;
178 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
179 if (ret)
180 return ret;
181
182 *sink_count = DP_GET_SINK_COUNT(value);
183 return 0;
184}
185
186static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
187{
188 struct cdn_dp_port *port;
189 int i, lanes;
190
191 for (i = 0; i < dp->ports; i++) {
192 port = dp->port[i];
193 lanes = cdn_dp_get_port_lanes(port);
194 if (lanes)
195 return port;
196 }
197 return NULL;
198}
199
200static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
201{
202 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
203 struct cdn_dp_port *port;
204 u8 sink_count = 0;
205
206 if (dp->active_port < 0 || dp->active_port >= dp->ports) {
207 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
208 return false;
209 }
210
211 port = dp->port[dp->active_port];
212
213 /*
214 * Attempt to read sink count, retry in case the sink may not be ready.
215 *
216 * Sinks are *supposed* to come up within 1ms from an off state, but
217 * some docks need more time to power up.
218 */
219 while (time_before(jiffies, timeout)) {
220 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
221 return false;
222
223 if (!cdn_dp_get_sink_count(dp, &sink_count))
224 return sink_count ? true : false;
225
226 usleep_range(5000, 10000);
227 }
228
229 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
230 return false;
231}
232
233static enum drm_connector_status
234cdn_dp_connector_detect(struct drm_connector *connector, bool force)
235{
236 struct cdn_dp_device *dp = connector_to_dp(connector);
237 enum drm_connector_status status = connector_status_disconnected;
238
239 mutex_lock(&dp->lock);
240 if (dp->connected)
241 status = connector_status_connected;
242 mutex_unlock(&dp->lock);
243
244 return status;
245}
246
247static void cdn_dp_connector_destroy(struct drm_connector *connector)
248{
249 drm_connector_unregister(connector);
250 drm_connector_cleanup(connector);
251}
252
253static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
254 .detect = cdn_dp_connector_detect,
255 .destroy = cdn_dp_connector_destroy,
256 .fill_modes = drm_helper_probe_single_connector_modes,
257 .reset = drm_atomic_helper_connector_reset,
258 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
259 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
260};
261
262static int cdn_dp_connector_get_modes(struct drm_connector *connector)
263{
264 struct cdn_dp_device *dp = connector_to_dp(connector);
265 struct edid *edid;
266 int ret = 0;
267
268 mutex_lock(&dp->lock);
269 edid = dp->edid;
270 if (edid) {
271 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
272 edid->width_cm, edid->height_cm);
273
274 dp->sink_has_audio = drm_detect_monitor_audio(edid);
275
276 drm_connector_update_edid_property(connector, edid);
277 ret = drm_add_edid_modes(connector, edid);
278 }
279 mutex_unlock(&dp->lock);
280
281 return ret;
282}
283
284static enum drm_mode_status
285cdn_dp_connector_mode_valid(struct drm_connector *connector,
286 struct drm_display_mode *mode)
287{
288 struct cdn_dp_device *dp = connector_to_dp(connector);
289 struct drm_display_info *display_info = &dp->connector.display_info;
290 u32 requested, actual, rate, sink_max, source_max = 0;
291 u8 lanes, bpc;
292
293 /* If DP is disconnected, every mode is invalid */
294 if (!dp->connected)
295 return MODE_BAD;
296
297 switch (display_info->bpc) {
298 case 10:
299 bpc = 10;
300 break;
301 case 6:
302 bpc = 6;
303 break;
304 default:
305 bpc = 8;
306 break;
307 }
308
309 requested = mode->clock * bpc * 3 / 1000;
310
311 source_max = dp->lanes;
312 sink_max = drm_dp_max_lane_count(dp->dpcd);
313 lanes = min(source_max, sink_max);
314
315 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
316 sink_max = drm_dp_max_link_rate(dp->dpcd);
317 rate = min(source_max, sink_max);
318
319 actual = rate * lanes / 100;
320
321 /* efficiency is about 0.8 */
322 actual = actual * 8 / 10;
323
324 if (requested > actual) {
325 DRM_DEV_DEBUG_KMS(dp->dev,
326 "requested=%d, actual=%d, clock=%d\n",
327 requested, actual, mode->clock);
328 return MODE_CLOCK_HIGH;
329 }
330
331 return MODE_OK;
332}
333
334static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
335 .get_modes = cdn_dp_connector_get_modes,
336 .mode_valid = cdn_dp_connector_mode_valid,
337};
338
339static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
340{
341 int ret;
342 const u32 *iram_data, *dram_data;
343 const struct firmware *fw = dp->fw;
344 const struct cdn_firmware_header *hdr;
345
346 hdr = (struct cdn_firmware_header *)fw->data;
347 if (fw->size != le32_to_cpu(hdr->size_bytes)) {
348 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
349 return -EINVAL;
350 }
351
352 iram_data = (const u32 *)(fw->data + hdr->header_size);
353 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
354
355 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
356 dram_data, hdr->dram_size);
357 if (ret)
358 return ret;
359
360 ret = cdn_dp_set_firmware_active(dp, true);
361 if (ret) {
362 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
363 return ret;
364 }
365
366 return cdn_dp_event_config(dp);
367}
368
369static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
370{
371 int ret;
372
373 if (!cdn_dp_check_sink_connection(dp))
374 return -ENODEV;
375
376 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
377 DP_RECEIVER_CAP_SIZE);
378 if (ret) {
379 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
380 return ret;
381 }
382
383 kfree(dp->edid);
384 dp->edid = drm_do_get_edid(&dp->connector,
385 cdn_dp_get_edid_block, dp);
386 return 0;
387}
388
389static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
390{
391 union extcon_property_value property;
392 int ret;
393
394 if (!port->phy_enabled) {
395 ret = phy_power_on(port->phy);
396 if (ret) {
397 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
398 ret);
399 goto err_phy;
400 }
401 port->phy_enabled = true;
402 }
403
404 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
405 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
406 if (ret) {
407 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
408 goto err_power_on;
409 }
410
411 ret = cdn_dp_get_hpd_status(dp);
412 if (ret <= 0) {
413 if (!ret)
414 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
415 goto err_power_on;
416 }
417
418 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
419 EXTCON_PROP_USB_TYPEC_POLARITY, &property);
420 if (ret) {
421 DRM_DEV_ERROR(dp->dev, "get property failed\n");
422 goto err_power_on;
423 }
424
425 port->lanes = cdn_dp_get_port_lanes(port);
426 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
427 if (ret) {
428 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
429 ret);
430 goto err_power_on;
431 }
432
433 dp->active_port = port->id;
434 return 0;
435
436err_power_on:
437 if (phy_power_off(port->phy))
438 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
439 else
440 port->phy_enabled = false;
441
442err_phy:
443 cdn_dp_grf_write(dp, GRF_SOC_CON26,
444 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
445 return ret;
446}
447
448static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
449 struct cdn_dp_port *port)
450{
451 int ret;
452
453 if (port->phy_enabled) {
454 ret = phy_power_off(port->phy);
455 if (ret) {
456 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
457 return ret;
458 }
459 }
460
461 port->phy_enabled = false;
462 port->lanes = 0;
463 dp->active_port = -1;
464 return 0;
465}
466
467static int cdn_dp_disable(struct cdn_dp_device *dp)
468{
469 int ret, i;
470
471 if (!dp->active)
472 return 0;
473
474 for (i = 0; i < dp->ports; i++)
475 cdn_dp_disable_phy(dp, dp->port[i]);
476
477 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
478 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
479 if (ret) {
480 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
481 ret);
482 return ret;
483 }
484
485 cdn_dp_set_firmware_active(dp, false);
486 cdn_dp_clk_disable(dp);
487 dp->active = false;
488 dp->max_lanes = 0;
489 dp->max_rate = 0;
490 if (!dp->connected) {
491 kfree(dp->edid);
492 dp->edid = NULL;
493 }
494
495 return 0;
496}
497
498static int cdn_dp_enable(struct cdn_dp_device *dp)
499{
500 int ret, i, lanes;
501 struct cdn_dp_port *port;
502
503 port = cdn_dp_connected_port(dp);
504 if (!port) {
505 DRM_DEV_ERROR(dp->dev,
506 "Can't enable without connection\n");
507 return -ENODEV;
508 }
509
510 if (dp->active)
511 return 0;
512
513 ret = cdn_dp_clk_enable(dp);
514 if (ret)
515 return ret;
516
517 ret = cdn_dp_firmware_init(dp);
518 if (ret) {
519 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
520 goto err_clk_disable;
521 }
522
523 /* only enable the port that connected with downstream device */
524 for (i = port->id; i < dp->ports; i++) {
525 port = dp->port[i];
526 lanes = cdn_dp_get_port_lanes(port);
527 if (lanes) {
528 ret = cdn_dp_enable_phy(dp, port);
529 if (ret)
530 continue;
531
532 ret = cdn_dp_get_sink_capability(dp);
533 if (ret) {
534 cdn_dp_disable_phy(dp, port);
535 } else {
536 dp->active = true;
537 dp->lanes = port->lanes;
538 return 0;
539 }
540 }
541 }
542
543err_clk_disable:
544 cdn_dp_clk_disable(dp);
545 return ret;
546}
547
548static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
549 struct drm_display_mode *mode,
550 struct drm_display_mode *adjusted)
551{
552 struct cdn_dp_device *dp = encoder_to_dp(encoder);
553 struct drm_display_info *display_info = &dp->connector.display_info;
554 struct video_info *video = &dp->video_info;
555
556 switch (display_info->bpc) {
557 case 10:
558 video->color_depth = 10;
559 break;
560 case 6:
561 video->color_depth = 6;
562 break;
563 default:
564 video->color_depth = 8;
565 break;
566 }
567
568 video->color_fmt = PXL_RGB;
569 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
570 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
571
572 drm_mode_copy(&dp->mode, adjusted);
573}
574
575static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
576{
577 u8 link_status[DP_LINK_STATUS_SIZE];
578 struct cdn_dp_port *port = cdn_dp_connected_port(dp);
579 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
580
581 if (!port || !dp->max_rate || !dp->max_lanes)
582 return false;
583
584 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
585 DP_LINK_STATUS_SIZE)) {
586 DRM_ERROR("Failed to get link status\n");
587 return false;
588 }
589
590 /* if link training is requested we should perform it always */
591 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
592}
593
594static void cdn_dp_audio_handle_plugged_change(struct cdn_dp_device *dp,
595 bool plugged)
596{
597 if (dp->codec_dev)
598 dp->plugged_cb(dp->codec_dev, plugged);
599}
600
601static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
602{
603 struct cdn_dp_device *dp = encoder_to_dp(encoder);
604 int ret, val;
605
606 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
607 if (ret < 0) {
608 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
609 return;
610 }
611
612 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
613 (ret) ? "LIT" : "BIG");
614 if (ret)
615 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
616 else
617 val = DP_SEL_VOP_LIT << 16;
618
619 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
620 if (ret)
621 return;
622
623 mutex_lock(&dp->lock);
624
625 ret = cdn_dp_enable(dp);
626 if (ret) {
627 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
628 ret);
629 goto out;
630 }
631 if (!cdn_dp_check_link_status(dp)) {
632 ret = cdn_dp_train_link(dp);
633 if (ret) {
634 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
635 goto out;
636 }
637 }
638
639 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
640 if (ret) {
641 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
642 goto out;
643 }
644
645 ret = cdn_dp_config_video(dp);
646 if (ret) {
647 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
648 goto out;
649 }
650
651 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
652 if (ret) {
653 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
654 goto out;
655 }
656
657 cdn_dp_audio_handle_plugged_change(dp, true);
658
659out:
660 mutex_unlock(&dp->lock);
661}
662
663static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
664{
665 struct cdn_dp_device *dp = encoder_to_dp(encoder);
666 int ret;
667
668 mutex_lock(&dp->lock);
669 cdn_dp_audio_handle_plugged_change(dp, false);
670
671 if (dp->active) {
672 ret = cdn_dp_disable(dp);
673 if (ret) {
674 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
675 ret);
676 }
677 }
678 mutex_unlock(&dp->lock);
679
680 /*
681 * In the following 2 cases, we need to run the event_work to re-enable
682 * the DP:
683 * 1. If there is not just one port device is connected, and remove one
684 * device from a port, the DP will be disabled here, at this case,
685 * run the event_work to re-open DP for the other port.
686 * 2. If re-training or re-config failed, the DP will be disabled here.
687 * run the event_work to re-connect it.
688 */
689 if (!dp->connected && cdn_dp_connected_port(dp))
690 schedule_work(&dp->event_work);
691}
692
693static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
694 struct drm_crtc_state *crtc_state,
695 struct drm_connector_state *conn_state)
696{
697 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
698
699 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
700 s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
701
702 return 0;
703}
704
705static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
706 .mode_set = cdn_dp_encoder_mode_set,
707 .enable = cdn_dp_encoder_enable,
708 .disable = cdn_dp_encoder_disable,
709 .atomic_check = cdn_dp_encoder_atomic_check,
710};
711
712static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
713{
714 struct device *dev = dp->dev;
715 struct device_node *np = dev->of_node;
716 struct platform_device *pdev = to_platform_device(dev);
717
718 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
719 if (IS_ERR(dp->grf)) {
720 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
721 return PTR_ERR(dp->grf);
722 }
723
724 dp->regs = devm_platform_ioremap_resource(pdev, 0);
725 if (IS_ERR(dp->regs)) {
726 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
727 return PTR_ERR(dp->regs);
728 }
729
730 dp->core_clk = devm_clk_get(dev, "core-clk");
731 if (IS_ERR(dp->core_clk)) {
732 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
733 return PTR_ERR(dp->core_clk);
734 }
735
736 dp->pclk = devm_clk_get(dev, "pclk");
737 if (IS_ERR(dp->pclk)) {
738 DRM_DEV_ERROR(dev, "cannot get pclk\n");
739 return PTR_ERR(dp->pclk);
740 }
741
742 dp->spdif_clk = devm_clk_get(dev, "spdif");
743 if (IS_ERR(dp->spdif_clk)) {
744 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
745 return PTR_ERR(dp->spdif_clk);
746 }
747
748 dp->grf_clk = devm_clk_get(dev, "grf");
749 if (IS_ERR(dp->grf_clk)) {
750 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
751 return PTR_ERR(dp->grf_clk);
752 }
753
754 dp->spdif_rst = devm_reset_control_get(dev, "spdif");
755 if (IS_ERR(dp->spdif_rst)) {
756 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
757 return PTR_ERR(dp->spdif_rst);
758 }
759
760 dp->dptx_rst = devm_reset_control_get(dev, "dptx");
761 if (IS_ERR(dp->dptx_rst)) {
762 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
763 return PTR_ERR(dp->dptx_rst);
764 }
765
766 dp->core_rst = devm_reset_control_get(dev, "core");
767 if (IS_ERR(dp->core_rst)) {
768 DRM_DEV_ERROR(dev, "no core reset control found\n");
769 return PTR_ERR(dp->core_rst);
770 }
771
772 dp->apb_rst = devm_reset_control_get(dev, "apb");
773 if (IS_ERR(dp->apb_rst)) {
774 DRM_DEV_ERROR(dev, "no apb reset control found\n");
775 return PTR_ERR(dp->apb_rst);
776 }
777
778 return 0;
779}
780
781static int cdn_dp_audio_hw_params(struct device *dev, void *data,
782 struct hdmi_codec_daifmt *daifmt,
783 struct hdmi_codec_params *params)
784{
785 struct cdn_dp_device *dp = dev_get_drvdata(dev);
786 struct audio_info audio = {
787 .sample_width = params->sample_width,
788 .sample_rate = params->sample_rate,
789 .channels = params->channels,
790 };
791 int ret;
792
793 mutex_lock(&dp->lock);
794 if (!dp->active) {
795 ret = -ENODEV;
796 goto out;
797 }
798
799 switch (daifmt->fmt) {
800 case HDMI_I2S:
801 audio.format = AFMT_I2S;
802 break;
803 case HDMI_SPDIF:
804 audio.format = AFMT_SPDIF;
805 break;
806 default:
807 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
808 ret = -EINVAL;
809 goto out;
810 }
811
812 ret = cdn_dp_audio_config(dp, &audio);
813 if (!ret)
814 dp->audio_info = audio;
815
816out:
817 mutex_unlock(&dp->lock);
818 return ret;
819}
820
821static void cdn_dp_audio_shutdown(struct device *dev, void *data)
822{
823 struct cdn_dp_device *dp = dev_get_drvdata(dev);
824 int ret;
825
826 mutex_lock(&dp->lock);
827 if (!dp->active)
828 goto out;
829
830 ret = cdn_dp_audio_stop(dp, &dp->audio_info);
831 if (!ret)
832 dp->audio_info.format = AFMT_UNUSED;
833out:
834 mutex_unlock(&dp->lock);
835}
836
837static int cdn_dp_audio_mute_stream(struct device *dev, void *data,
838 bool enable, int direction)
839{
840 struct cdn_dp_device *dp = dev_get_drvdata(dev);
841 int ret;
842
843 mutex_lock(&dp->lock);
844 if (!dp->active) {
845 ret = -ENODEV;
846 goto out;
847 }
848
849 ret = cdn_dp_audio_mute(dp, enable);
850
851out:
852 mutex_unlock(&dp->lock);
853 return ret;
854}
855
856static int cdn_dp_audio_get_eld(struct device *dev, void *data,
857 u8 *buf, size_t len)
858{
859 struct cdn_dp_device *dp = dev_get_drvdata(dev);
860
861 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
862
863 return 0;
864}
865
866static int cdn_dp_audio_hook_plugged_cb(struct device *dev, void *data,
867 hdmi_codec_plugged_cb fn,
868 struct device *codec_dev)
869{
870 struct cdn_dp_device *dp = dev_get_drvdata(dev);
871
872 mutex_lock(&dp->lock);
873 dp->plugged_cb = fn;
874 dp->codec_dev = codec_dev;
875 cdn_dp_audio_handle_plugged_change(dp, dp->connected);
876 mutex_unlock(&dp->lock);
877
878 return 0;
879}
880
881static const struct hdmi_codec_ops audio_codec_ops = {
882 .hw_params = cdn_dp_audio_hw_params,
883 .audio_shutdown = cdn_dp_audio_shutdown,
884 .mute_stream = cdn_dp_audio_mute_stream,
885 .get_eld = cdn_dp_audio_get_eld,
886 .hook_plugged_cb = cdn_dp_audio_hook_plugged_cb,
887 .no_capture_mute = 1,
888};
889
890static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
891 struct device *dev)
892{
893 struct hdmi_codec_pdata codec_data = {
894 .i2s = 1,
895 .spdif = 1,
896 .ops = &audio_codec_ops,
897 .max_i2s_channels = 8,
898 };
899
900 dp->audio_pdev = platform_device_register_data(
901 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
902 &codec_data, sizeof(codec_data));
903
904 return PTR_ERR_OR_ZERO(dp->audio_pdev);
905}
906
907static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
908{
909 int ret;
910 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
911 unsigned long sleep = 1000;
912
913 WARN_ON(!mutex_is_locked(&dp->lock));
914
915 if (dp->fw_loaded)
916 return 0;
917
918 /* Drop the lock before getting the firmware to avoid blocking boot */
919 mutex_unlock(&dp->lock);
920
921 while (time_before(jiffies, timeout)) {
922 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
923 if (ret == -ENOENT) {
924 msleep(sleep);
925 sleep *= 2;
926 continue;
927 } else if (ret) {
928 DRM_DEV_ERROR(dp->dev,
929 "failed to request firmware: %d\n", ret);
930 goto out;
931 }
932
933 dp->fw_loaded = true;
934 ret = 0;
935 goto out;
936 }
937
938 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
939 ret = -ETIMEDOUT;
940out:
941 mutex_lock(&dp->lock);
942 return ret;
943}
944
945static void cdn_dp_pd_event_work(struct work_struct *work)
946{
947 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
948 event_work);
949 struct drm_connector *connector = &dp->connector;
950 enum drm_connector_status old_status;
951
952 int ret;
953
954 mutex_lock(&dp->lock);
955
956 if (dp->suspended)
957 goto out;
958
959 ret = cdn_dp_request_firmware(dp);
960 if (ret)
961 goto out;
962
963 dp->connected = true;
964
965 /* Not connected, notify userspace to disable the block */
966 if (!cdn_dp_connected_port(dp)) {
967 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
968 dp->connected = false;
969
970 /* Connected but not enabled, enable the block */
971 } else if (!dp->active) {
972 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
973 ret = cdn_dp_enable(dp);
974 if (ret) {
975 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
976 dp->connected = false;
977 }
978
979 /* Enabled and connected to a dongle without a sink, notify userspace */
980 } else if (!cdn_dp_check_sink_connection(dp)) {
981 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
982 dp->connected = false;
983
984 /* Enabled and connected with a sink, re-train if requested */
985 } else if (!cdn_dp_check_link_status(dp)) {
986 unsigned int rate = dp->max_rate;
987 unsigned int lanes = dp->max_lanes;
988 struct drm_display_mode *mode = &dp->mode;
989
990 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
991 ret = cdn_dp_train_link(dp);
992 if (ret) {
993 dp->connected = false;
994 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
995 goto out;
996 }
997
998 /* If training result is changed, update the video config */
999 if (mode->clock &&
1000 (rate != dp->max_rate || lanes != dp->max_lanes)) {
1001 ret = cdn_dp_config_video(dp);
1002 if (ret) {
1003 dp->connected = false;
1004 DRM_DEV_ERROR(dp->dev,
1005 "Failed to config video %d\n",
1006 ret);
1007 }
1008 }
1009 }
1010
1011out:
1012 mutex_unlock(&dp->lock);
1013
1014 old_status = connector->status;
1015 connector->status = connector->funcs->detect(connector, false);
1016 if (old_status != connector->status)
1017 drm_kms_helper_hotplug_event(dp->drm_dev);
1018}
1019
1020static int cdn_dp_pd_event(struct notifier_block *nb,
1021 unsigned long event, void *priv)
1022{
1023 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1024 event_nb);
1025 struct cdn_dp_device *dp = port->dp;
1026
1027 /*
1028 * It would be nice to be able to just do the work inline right here.
1029 * However, we need to make a bunch of calls that might sleep in order
1030 * to turn on the block/phy, so use a worker instead.
1031 */
1032 schedule_work(&dp->event_work);
1033
1034 return NOTIFY_DONE;
1035}
1036
1037static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1038{
1039 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1040 struct drm_encoder *encoder;
1041 struct drm_connector *connector;
1042 struct cdn_dp_port *port;
1043 struct drm_device *drm_dev = data;
1044 int ret, i;
1045
1046 ret = cdn_dp_parse_dt(dp);
1047 if (ret < 0)
1048 return ret;
1049
1050 dp->drm_dev = drm_dev;
1051 dp->connected = false;
1052 dp->active = false;
1053 dp->active_port = -1;
1054 dp->fw_loaded = false;
1055
1056 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1057
1058 encoder = &dp->encoder.encoder;
1059
1060 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1061 dev->of_node);
1062 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1063
1064 ret = drm_simple_encoder_init(drm_dev, encoder,
1065 DRM_MODE_ENCODER_TMDS);
1066 if (ret) {
1067 DRM_ERROR("failed to initialize encoder with drm\n");
1068 return ret;
1069 }
1070
1071 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1072
1073 connector = &dp->connector;
1074 connector->polled = DRM_CONNECTOR_POLL_HPD;
1075 connector->dpms = DRM_MODE_DPMS_OFF;
1076
1077 ret = drm_connector_init(drm_dev, connector,
1078 &cdn_dp_atomic_connector_funcs,
1079 DRM_MODE_CONNECTOR_DisplayPort);
1080 if (ret) {
1081 DRM_ERROR("failed to initialize connector with drm\n");
1082 goto err_free_encoder;
1083 }
1084
1085 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1086
1087 ret = drm_connector_attach_encoder(connector, encoder);
1088 if (ret) {
1089 DRM_ERROR("failed to attach connector and encoder\n");
1090 goto err_free_connector;
1091 }
1092
1093 for (i = 0; i < dp->ports; i++) {
1094 port = dp->port[i];
1095
1096 port->event_nb.notifier_call = cdn_dp_pd_event;
1097 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1098 EXTCON_DISP_DP,
1099 &port->event_nb);
1100 if (ret) {
1101 DRM_DEV_ERROR(dev,
1102 "register EXTCON_DISP_DP notifier err\n");
1103 goto err_free_connector;
1104 }
1105 }
1106
1107 pm_runtime_enable(dev);
1108
1109 schedule_work(&dp->event_work);
1110
1111 return 0;
1112
1113err_free_connector:
1114 drm_connector_cleanup(connector);
1115err_free_encoder:
1116 drm_encoder_cleanup(encoder);
1117 return ret;
1118}
1119
1120static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1121{
1122 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1123 struct drm_encoder *encoder = &dp->encoder.encoder;
1124 struct drm_connector *connector = &dp->connector;
1125
1126 cancel_work_sync(&dp->event_work);
1127 cdn_dp_encoder_disable(encoder);
1128 encoder->funcs->destroy(encoder);
1129 connector->funcs->destroy(connector);
1130
1131 pm_runtime_disable(dev);
1132 if (dp->fw_loaded)
1133 release_firmware(dp->fw);
1134 kfree(dp->edid);
1135 dp->edid = NULL;
1136}
1137
1138static const struct component_ops cdn_dp_component_ops = {
1139 .bind = cdn_dp_bind,
1140 .unbind = cdn_dp_unbind,
1141};
1142
1143static int cdn_dp_suspend(struct device *dev)
1144{
1145 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1146 int ret = 0;
1147
1148 mutex_lock(&dp->lock);
1149 if (dp->active)
1150 ret = cdn_dp_disable(dp);
1151 dp->suspended = true;
1152 mutex_unlock(&dp->lock);
1153
1154 return ret;
1155}
1156
1157static __maybe_unused int cdn_dp_resume(struct device *dev)
1158{
1159 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1160
1161 mutex_lock(&dp->lock);
1162 dp->suspended = false;
1163 if (dp->fw_loaded)
1164 schedule_work(&dp->event_work);
1165 mutex_unlock(&dp->lock);
1166
1167 return 0;
1168}
1169
1170static int cdn_dp_probe(struct platform_device *pdev)
1171{
1172 struct device *dev = &pdev->dev;
1173 const struct of_device_id *match;
1174 struct cdn_dp_data *dp_data;
1175 struct cdn_dp_port *port;
1176 struct cdn_dp_device *dp;
1177 struct extcon_dev *extcon;
1178 struct phy *phy;
1179 int ret;
1180 int i;
1181
1182 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1183 if (!dp)
1184 return -ENOMEM;
1185 dp->dev = dev;
1186
1187 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1188 dp_data = (struct cdn_dp_data *)match->data;
1189
1190 for (i = 0; i < dp_data->max_phy; i++) {
1191 extcon = extcon_get_edev_by_phandle(dev, i);
1192 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1193
1194 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1195 PTR_ERR(phy) == -EPROBE_DEFER)
1196 return -EPROBE_DEFER;
1197
1198 if (IS_ERR(extcon) || IS_ERR(phy))
1199 continue;
1200
1201 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1202 if (!port)
1203 return -ENOMEM;
1204
1205 port->extcon = extcon;
1206 port->phy = phy;
1207 port->dp = dp;
1208 port->id = i;
1209 dp->port[dp->ports++] = port;
1210 }
1211
1212 if (!dp->ports) {
1213 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1214 return -EINVAL;
1215 }
1216
1217 mutex_init(&dp->lock);
1218 dev_set_drvdata(dev, dp);
1219
1220 ret = cdn_dp_audio_codec_init(dp, dev);
1221 if (ret)
1222 return ret;
1223
1224 ret = component_add(dev, &cdn_dp_component_ops);
1225 if (ret)
1226 goto err_audio_deinit;
1227
1228 return 0;
1229
1230err_audio_deinit:
1231 platform_device_unregister(dp->audio_pdev);
1232 return ret;
1233}
1234
1235static void cdn_dp_remove(struct platform_device *pdev)
1236{
1237 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1238
1239 platform_device_unregister(dp->audio_pdev);
1240 cdn_dp_suspend(dp->dev);
1241 component_del(&pdev->dev, &cdn_dp_component_ops);
1242}
1243
1244static void cdn_dp_shutdown(struct platform_device *pdev)
1245{
1246 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1247
1248 cdn_dp_suspend(dp->dev);
1249}
1250
1251static const struct dev_pm_ops cdn_dp_pm_ops = {
1252 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1253 cdn_dp_resume)
1254};
1255
1256struct platform_driver cdn_dp_driver = {
1257 .probe = cdn_dp_probe,
1258 .remove_new = cdn_dp_remove,
1259 .shutdown = cdn_dp_shutdown,
1260 .driver = {
1261 .name = "cdn-dp",
1262 .owner = THIS_MODULE,
1263 .of_match_table = cdn_dp_dt_ids,
1264 .pm = &cdn_dp_pm_ops,
1265 },
1266};