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