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Get rid of 'remove_new' relic from platform driver struct
[linux.git] / drivers / gpu / drm / rockchip / cdn-dp-core.c
blobff9d95e2c4d4d5b6dc2682f8750e94cd1e7cf556
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
28 static 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
33 static 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"
50 MODULE_FIRMWARE(CDN_DP_FIRMWARE);
51
52 struct cdn_dp_data {
53 u8 max_phy;
54 };
55
56 static struct cdn_dp_data rk3399_cdn_dp = {
57 .max_phy = 2,
58 };
59
60 static const struct of_device_id cdn_dp_dt_ids[] = {
61 { .compatible = "rockchip,rk3399-cdn-dp",
62 .data = (void *)&rk3399_cdn_dp },
63 {}
64 };
65
66 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
67
68 static 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
91 static 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
133 err_set_rate:
134 pm_runtime_put(dp->dev);
135 err_pm_runtime_get:
136 clk_disable_unprepare(dp->core_clk);
137 err_core_clk:
138 clk_disable_unprepare(dp->pclk);
139 err_pclk:
140 return ret;
141 }
142
143 static 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
150 static 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
172 static 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
186 static 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
200 static 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
233 static enum drm_connector_status
234 cdn_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
247 static void cdn_dp_connector_destroy(struct drm_connector *connector)
248 {
249 drm_connector_unregister(connector);
250 drm_connector_cleanup(connector);
251 }
252
253 static 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
262 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
263 {
264 struct cdn_dp_device *dp = connector_to_dp(connector);
265 int ret = 0;
266
267 mutex_lock(&dp->lock);
268
269 ret = drm_edid_connector_add_modes(connector);
270
271 mutex_unlock(&dp->lock);
272
273 return ret;
274 }
275
276 static enum drm_mode_status
277 cdn_dp_connector_mode_valid(struct drm_connector *connector,
278 struct drm_display_mode *mode)
279 {
280 struct cdn_dp_device *dp = connector_to_dp(connector);
281 struct drm_display_info *display_info = &dp->connector.display_info;
282 u32 requested, actual, rate, sink_max, source_max = 0;
283 u8 lanes, bpc;
284
285 /* If DP is disconnected, every mode is invalid */
286 if (!dp->connected)
287 return MODE_BAD;
288
289 switch (display_info->bpc) {
290 case 10:
291 bpc = 10;
292 break;
293 case 6:
294 bpc = 6;
295 break;
296 default:
297 bpc = 8;
298 break;
299 }
300
301 requested = mode->clock * bpc * 3 / 1000;
302
303 source_max = dp->lanes;
304 sink_max = drm_dp_max_lane_count(dp->dpcd);
305 lanes = min(source_max, sink_max);
306
307 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
308 sink_max = drm_dp_max_link_rate(dp->dpcd);
309 rate = min(source_max, sink_max);
310
311 actual = rate * lanes / 100;
312
313 /* efficiency is about 0.8 */
314 actual = actual * 8 / 10;
315
316 if (requested > actual) {
317 DRM_DEV_DEBUG_KMS(dp->dev,
318 "requested=%d, actual=%d, clock=%d\n",
319 requested, actual, mode->clock);
320 return MODE_CLOCK_HIGH;
321 }
322
323 return MODE_OK;
324 }
325
326 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
327 .get_modes = cdn_dp_connector_get_modes,
328 .mode_valid = cdn_dp_connector_mode_valid,
329 };
330
331 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
332 {
333 int ret;
334 const u32 *iram_data, *dram_data;
335 const struct firmware *fw = dp->fw;
336 const struct cdn_firmware_header *hdr;
337
338 hdr = (struct cdn_firmware_header *)fw->data;
339 if (fw->size != le32_to_cpu(hdr->size_bytes)) {
340 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
341 return -EINVAL;
342 }
343
344 iram_data = (const u32 *)(fw->data + hdr->header_size);
345 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
346
347 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
348 dram_data, hdr->dram_size);
349 if (ret)
350 return ret;
351
352 ret = cdn_dp_set_firmware_active(dp, true);
353 if (ret) {
354 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
355 return ret;
356 }
357
358 return cdn_dp_event_config(dp);
359 }
360
361 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
362 {
363 const struct drm_display_info *info = &dp->connector.display_info;
364 int ret;
365
366 if (!cdn_dp_check_sink_connection(dp))
367 return -ENODEV;
368
369 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
370 DP_RECEIVER_CAP_SIZE);
371 if (ret) {
372 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
373 return ret;
374 }
375
376 drm_edid_free(dp->drm_edid);
377 dp->drm_edid = drm_edid_read_custom(&dp->connector,
378 cdn_dp_get_edid_block, dp);
379 drm_edid_connector_update(&dp->connector, dp->drm_edid);
380
381 dp->sink_has_audio = info->has_audio;
382
383 if (dp->drm_edid)
384 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
385 info->width_mm / 10, info->height_mm / 10);
386
387 return 0;
388 }
389
390 static 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
437 err_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
443 err_phy:
444 cdn_dp_grf_write(dp, GRF_SOC_CON26,
445 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
446 return ret;
447 }
448
449 static 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
468 static 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->max_lanes = 0;
490 dp->max_rate = 0;
491 if (!dp->connected) {
492 drm_edid_free(dp->drm_edid);
493 dp->drm_edid = NULL;
494 }
495
496 return 0;
497 }
498
499 static 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
544 err_clk_disable:
545 cdn_dp_clk_disable(dp);
546 return ret;
547 }
548
549 static 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 drm_mode_copy(&dp->mode, adjusted);
574 }
575
576 static 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->max_rate || !dp->max_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
595 static void cdn_dp_audio_handle_plugged_change(struct cdn_dp_device *dp,
596 bool plugged)
597 {
598 if (dp->codec_dev)
599 dp->plugged_cb(dp->codec_dev, plugged);
600 }
601
602 static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
603 {
604 struct cdn_dp_device *dp = encoder_to_dp(encoder);
605 int ret, val;
606
607 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
608 if (ret < 0) {
609 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
610 return;
611 }
612
613 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
614 (ret) ? "LIT" : "BIG");
615 if (ret)
616 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
617 else
618 val = DP_SEL_VOP_LIT << 16;
619
620 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
621 if (ret)
622 return;
623
624 mutex_lock(&dp->lock);
625
626 ret = cdn_dp_enable(dp);
627 if (ret) {
628 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
629 ret);
630 goto out;
631 }
632 if (!cdn_dp_check_link_status(dp)) {
633 ret = cdn_dp_train_link(dp);
634 if (ret) {
635 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
636 goto out;
637 }
638 }
639
640 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
641 if (ret) {
642 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
643 goto out;
644 }
645
646 ret = cdn_dp_config_video(dp);
647 if (ret) {
648 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
649 goto out;
650 }
651
652 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
653 if (ret) {
654 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
655 goto out;
656 }
657
658 cdn_dp_audio_handle_plugged_change(dp, true);
659
660 out:
661 mutex_unlock(&dp->lock);
662 }
663
664 static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
665 {
666 struct cdn_dp_device *dp = encoder_to_dp(encoder);
667 int ret;
668
669 mutex_lock(&dp->lock);
670 cdn_dp_audio_handle_plugged_change(dp, false);
671
672 if (dp->active) {
673 ret = cdn_dp_disable(dp);
674 if (ret) {
675 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
676 ret);
677 }
678 }
679 mutex_unlock(&dp->lock);
680
681 /*
682 * In the following 2 cases, we need to run the event_work to re-enable
683 * the DP:
684 * 1. If there is not just one port device is connected, and remove one
685 * device from a port, the DP will be disabled here, at this case,
686 * run the event_work to re-open DP for the other port.
687 * 2. If re-training or re-config failed, the DP will be disabled here.
688 * run the event_work to re-connect it.
689 */
690 if (!dp->connected && cdn_dp_connected_port(dp))
691 schedule_work(&dp->event_work);
692 }
693
694 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
695 struct drm_crtc_state *crtc_state,
696 struct drm_connector_state *conn_state)
697 {
698 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
699
700 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
701 s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
702
703 return 0;
704 }
705
706 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
707 .mode_set = cdn_dp_encoder_mode_set,
708 .enable = cdn_dp_encoder_enable,
709 .disable = cdn_dp_encoder_disable,
710 .atomic_check = cdn_dp_encoder_atomic_check,
711 };
712
713 static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
714 {
715 struct device *dev = dp->dev;
716 struct device_node *np = dev->of_node;
717 struct platform_device *pdev = to_platform_device(dev);
718
719 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
720 if (IS_ERR(dp->grf)) {
721 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
722 return PTR_ERR(dp->grf);
723 }
724
725 dp->regs = devm_platform_ioremap_resource(pdev, 0);
726 if (IS_ERR(dp->regs)) {
727 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
728 return PTR_ERR(dp->regs);
729 }
730
731 dp->core_clk = devm_clk_get(dev, "core-clk");
732 if (IS_ERR(dp->core_clk)) {
733 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
734 return PTR_ERR(dp->core_clk);
735 }
736
737 dp->pclk = devm_clk_get(dev, "pclk");
738 if (IS_ERR(dp->pclk)) {
739 DRM_DEV_ERROR(dev, "cannot get pclk\n");
740 return PTR_ERR(dp->pclk);
741 }
742
743 dp->spdif_clk = devm_clk_get(dev, "spdif");
744 if (IS_ERR(dp->spdif_clk)) {
745 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
746 return PTR_ERR(dp->spdif_clk);
747 }
748
749 dp->grf_clk = devm_clk_get(dev, "grf");
750 if (IS_ERR(dp->grf_clk)) {
751 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
752 return PTR_ERR(dp->grf_clk);
753 }
754
755 dp->spdif_rst = devm_reset_control_get(dev, "spdif");
756 if (IS_ERR(dp->spdif_rst)) {
757 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
758 return PTR_ERR(dp->spdif_rst);
759 }
760
761 dp->dptx_rst = devm_reset_control_get(dev, "dptx");
762 if (IS_ERR(dp->dptx_rst)) {
763 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
764 return PTR_ERR(dp->dptx_rst);
765 }
766
767 dp->core_rst = devm_reset_control_get(dev, "core");
768 if (IS_ERR(dp->core_rst)) {
769 DRM_DEV_ERROR(dev, "no core reset control found\n");
770 return PTR_ERR(dp->core_rst);
771 }
772
773 dp->apb_rst = devm_reset_control_get(dev, "apb");
774 if (IS_ERR(dp->apb_rst)) {
775 DRM_DEV_ERROR(dev, "no apb reset control found\n");
776 return PTR_ERR(dp->apb_rst);
777 }
778
779 return 0;
780 }
781
782 static int cdn_dp_audio_hw_params(struct device *dev, void *data,
783 struct hdmi_codec_daifmt *daifmt,
784 struct hdmi_codec_params *params)
785 {
786 struct cdn_dp_device *dp = dev_get_drvdata(dev);
787 struct audio_info audio = {
788 .sample_width = params->sample_width,
789 .sample_rate = params->sample_rate,
790 .channels = params->channels,
791 };
792 int ret;
793
794 mutex_lock(&dp->lock);
795 if (!dp->active) {
796 ret = -ENODEV;
797 goto out;
798 }
799
800 switch (daifmt->fmt) {
801 case HDMI_I2S:
802 audio.format = AFMT_I2S;
803 break;
804 case HDMI_SPDIF:
805 audio.format = AFMT_SPDIF;
806 break;
807 default:
808 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
809 ret = -EINVAL;
810 goto out;
811 }
812
813 ret = cdn_dp_audio_config(dp, &audio);
814 if (!ret)
815 dp->audio_info = audio;
816
817 out:
818 mutex_unlock(&dp->lock);
819 return ret;
820 }
821
822 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
823 {
824 struct cdn_dp_device *dp = dev_get_drvdata(dev);
825 int ret;
826
827 mutex_lock(&dp->lock);
828 if (!dp->active)
829 goto out;
830
831 ret = cdn_dp_audio_stop(dp, &dp->audio_info);
832 if (!ret)
833 dp->audio_info.format = AFMT_UNUSED;
834 out:
835 mutex_unlock(&dp->lock);
836 }
837
838 static int cdn_dp_audio_mute_stream(struct device *dev, void *data,
839 bool enable, int direction)
840 {
841 struct cdn_dp_device *dp = dev_get_drvdata(dev);
842 int ret;
843
844 mutex_lock(&dp->lock);
845 if (!dp->active) {
846 ret = -ENODEV;
847 goto out;
848 }
849
850 ret = cdn_dp_audio_mute(dp, enable);
851
852 out:
853 mutex_unlock(&dp->lock);
854 return ret;
855 }
856
857 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
858 u8 *buf, size_t len)
859 {
860 struct cdn_dp_device *dp = dev_get_drvdata(dev);
861
862 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
863
864 return 0;
865 }
866
867 static int cdn_dp_audio_hook_plugged_cb(struct device *dev, void *data,
868 hdmi_codec_plugged_cb fn,
869 struct device *codec_dev)
870 {
871 struct cdn_dp_device *dp = dev_get_drvdata(dev);
872
873 mutex_lock(&dp->lock);
874 dp->plugged_cb = fn;
875 dp->codec_dev = codec_dev;
876 cdn_dp_audio_handle_plugged_change(dp, dp->connected);
877 mutex_unlock(&dp->lock);
878
879 return 0;
880 }
881
882 static const struct hdmi_codec_ops audio_codec_ops = {
883 .hw_params = cdn_dp_audio_hw_params,
884 .audio_shutdown = cdn_dp_audio_shutdown,
885 .mute_stream = cdn_dp_audio_mute_stream,
886 .get_eld = cdn_dp_audio_get_eld,
887 .hook_plugged_cb = cdn_dp_audio_hook_plugged_cb,
888 .no_capture_mute = 1,
889 };
890
891 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
892 struct device *dev)
893 {
894 struct hdmi_codec_pdata codec_data = {
895 .i2s = 1,
896 .spdif = 1,
897 .ops = &audio_codec_ops,
898 .max_i2s_channels = 8,
899 };
900
901 dp->audio_pdev = platform_device_register_data(
902 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
903 &codec_data, sizeof(codec_data));
904
905 return PTR_ERR_OR_ZERO(dp->audio_pdev);
906 }
907
908 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
909 {
910 int ret;
911 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
912 unsigned long sleep = 1000;
913
914 WARN_ON(!mutex_is_locked(&dp->lock));
915
916 if (dp->fw_loaded)
917 return 0;
918
919 /* Drop the lock before getting the firmware to avoid blocking boot */
920 mutex_unlock(&dp->lock);
921
922 while (time_before(jiffies, timeout)) {
923 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
924 if (ret == -ENOENT) {
925 msleep(sleep);
926 sleep *= 2;
927 continue;
928 } else if (ret) {
929 DRM_DEV_ERROR(dp->dev,
930 "failed to request firmware: %d\n", ret);
931 goto out;
932 }
933
934 dp->fw_loaded = true;
935 ret = 0;
936 goto out;
937 }
938
939 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
940 ret = -ETIMEDOUT;
941 out:
942 mutex_lock(&dp->lock);
943 return ret;
944 }
945
946 static void cdn_dp_pd_event_work(struct work_struct *work)
947 {
948 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
949 event_work);
950 struct drm_connector *connector = &dp->connector;
951 enum drm_connector_status old_status;
952
953 int ret;
954
955 mutex_lock(&dp->lock);
956
957 if (dp->suspended)
958 goto out;
959
960 ret = cdn_dp_request_firmware(dp);
961 if (ret)
962 goto out;
963
964 dp->connected = true;
965
966 /* Not connected, notify userspace to disable the block */
967 if (!cdn_dp_connected_port(dp)) {
968 DRM_DEV_INFO(dp->dev, "Not connected; disabling cdn\n");
969 dp->connected = false;
970
971 /* Connected but not enabled, enable the block */
972 } else if (!dp->active) {
973 DRM_DEV_INFO(dp->dev, "Connected, not enabled; enabling cdn\n");
974 ret = cdn_dp_enable(dp);
975 if (ret) {
976 DRM_DEV_ERROR(dp->dev, "Enabling dp failed: %d\n", ret);
977 dp->connected = false;
978 }
979
980 /* Enabled and connected to a dongle without a sink, notify userspace */
981 } else if (!cdn_dp_check_sink_connection(dp)) {
982 DRM_DEV_INFO(dp->dev, "Connected without sink; assert hpd\n");
983 dp->connected = false;
984
985 /* Enabled and connected with a sink, re-train if requested */
986 } else if (!cdn_dp_check_link_status(dp)) {
987 unsigned int rate = dp->max_rate;
988 unsigned int lanes = dp->max_lanes;
989 struct drm_display_mode *mode = &dp->mode;
990
991 DRM_DEV_INFO(dp->dev, "Connected with sink; re-train link\n");
992 ret = cdn_dp_train_link(dp);
993 if (ret) {
994 dp->connected = false;
995 DRM_DEV_ERROR(dp->dev, "Training link failed: %d\n", ret);
996 goto out;
997 }
998
999 /* If training result is changed, update the video config */
1000 if (mode->clock &&
1001 (rate != dp->max_rate || lanes != dp->max_lanes)) {
1002 ret = cdn_dp_config_video(dp);
1003 if (ret) {
1004 dp->connected = false;
1005 DRM_DEV_ERROR(dp->dev, "Failed to configure video: %d\n", ret);
1006 }
1007 }
1008 }
1009
1010 out:
1011 mutex_unlock(&dp->lock);
1012
1013 old_status = connector->status;
1014 connector->status = connector->funcs->detect(connector, false);
1015 if (old_status != connector->status)
1016 drm_kms_helper_hotplug_event(dp->drm_dev);
1017 }
1018
1019 static int cdn_dp_pd_event(struct notifier_block *nb,
1020 unsigned long event, void *priv)
1021 {
1022 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1023 event_nb);
1024 struct cdn_dp_device *dp = port->dp;
1025
1026 /*
1027 * It would be nice to be able to just do the work inline right here.
1028 * However, we need to make a bunch of calls that might sleep in order
1029 * to turn on the block/phy, so use a worker instead.
1030 */
1031 schedule_work(&dp->event_work);
1032
1033 return NOTIFY_DONE;
1034 }
1035
1036 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1037 {
1038 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1039 struct drm_encoder *encoder;
1040 struct drm_connector *connector;
1041 struct cdn_dp_port *port;
1042 struct drm_device *drm_dev = data;
1043 int ret, i;
1044
1045 ret = cdn_dp_parse_dt(dp);
1046 if (ret < 0)
1047 return ret;
1048
1049 dp->drm_dev = drm_dev;
1050 dp->connected = false;
1051 dp->active = false;
1052 dp->active_port = -1;
1053 dp->fw_loaded = false;
1054
1055 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1056
1057 encoder = &dp->encoder.encoder;
1058
1059 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1060 dev->of_node);
1061 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1062
1063 ret = drm_simple_encoder_init(drm_dev, encoder,
1064 DRM_MODE_ENCODER_TMDS);
1065 if (ret) {
1066 DRM_ERROR("failed to initialize encoder with drm\n");
1067 return ret;
1068 }
1069
1070 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1071
1072 connector = &dp->connector;
1073 connector->polled = DRM_CONNECTOR_POLL_HPD;
1074 connector->dpms = DRM_MODE_DPMS_OFF;
1075
1076 ret = drm_connector_init(drm_dev, connector,
1077 &cdn_dp_atomic_connector_funcs,
1078 DRM_MODE_CONNECTOR_DisplayPort);
1079 if (ret) {
1080 DRM_ERROR("failed to initialize connector with drm\n");
1081 goto err_free_encoder;
1082 }
1083
1084 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1085
1086 ret = drm_connector_attach_encoder(connector, encoder);
1087 if (ret) {
1088 DRM_ERROR("failed to attach connector and encoder\n");
1089 goto err_free_connector;
1090 }
1091
1092 for (i = 0; i < dp->ports; i++) {
1093 port = dp->port[i];
1094
1095 port->event_nb.notifier_call = cdn_dp_pd_event;
1096 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1097 EXTCON_DISP_DP,
1098 &port->event_nb);
1099 if (ret) {
1100 DRM_DEV_ERROR(dev,
1101 "register EXTCON_DISP_DP notifier err\n");
1102 goto err_free_connector;
1103 }
1104 }
1105
1106 pm_runtime_enable(dev);
1107
1108 schedule_work(&dp->event_work);
1109
1110 return 0;
1111
1112 err_free_connector:
1113 drm_connector_cleanup(connector);
1114 err_free_encoder:
1115 drm_encoder_cleanup(encoder);
1116 return ret;
1117 }
1118
1119 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1120 {
1121 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1122 struct drm_encoder *encoder = &dp->encoder.encoder;
1123 struct drm_connector *connector = &dp->connector;
1124
1125 cancel_work_sync(&dp->event_work);
1126 cdn_dp_encoder_disable(encoder);
1127 encoder->funcs->destroy(encoder);
1128 connector->funcs->destroy(connector);
1129
1130 pm_runtime_disable(dev);
1131 if (dp->fw_loaded)
1132 release_firmware(dp->fw);
1133 drm_edid_free(dp->drm_edid);
1134 dp->drm_edid = NULL;
1135 }
1136
1137 static const struct component_ops cdn_dp_component_ops = {
1138 .bind = cdn_dp_bind,
1139 .unbind = cdn_dp_unbind,
1140 };
1141
1142 static int cdn_dp_suspend(struct device *dev)
1143 {
1144 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1145 int ret = 0;
1146
1147 mutex_lock(&dp->lock);
1148 if (dp->active)
1149 ret = cdn_dp_disable(dp);
1150 dp->suspended = true;
1151 mutex_unlock(&dp->lock);
1152
1153 return ret;
1154 }
1155
1156 static __maybe_unused int cdn_dp_resume(struct device *dev)
1157 {
1158 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1159
1160 mutex_lock(&dp->lock);
1161 dp->suspended = false;
1162 if (dp->fw_loaded)
1163 schedule_work(&dp->event_work);
1164 mutex_unlock(&dp->lock);
1165
1166 return 0;
1167 }
1168
1169 static int cdn_dp_probe(struct platform_device *pdev)
1170 {
1171 struct device *dev = &pdev->dev;
1172 const struct of_device_id *match;
1173 struct cdn_dp_data *dp_data;
1174 struct cdn_dp_port *port;
1175 struct cdn_dp_device *dp;
1176 struct extcon_dev *extcon;
1177 struct phy *phy;
1178 int ret;
1179 int i;
1180
1181 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1182 if (!dp)
1183 return -ENOMEM;
1184 dp->dev = dev;
1185
1186 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1187 dp_data = (struct cdn_dp_data *)match->data;
1188
1189 for (i = 0; i < dp_data->max_phy; i++) {
1190 extcon = extcon_get_edev_by_phandle(dev, i);
1191 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1192
1193 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1194 PTR_ERR(phy) == -EPROBE_DEFER)
1195 return -EPROBE_DEFER;
1196
1197 if (IS_ERR(extcon) || IS_ERR(phy))
1198 continue;
1199
1200 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1201 if (!port)
1202 return -ENOMEM;
1203
1204 port->extcon = extcon;
1205 port->phy = phy;
1206 port->dp = dp;
1207 port->id = i;
1208 dp->port[dp->ports++] = port;
1209 }
1210
1211 if (!dp->ports) {
1212 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1213 return -EINVAL;
1214 }
1215
1216 mutex_init(&dp->lock);
1217 dev_set_drvdata(dev, dp);
1218
1219 ret = cdn_dp_audio_codec_init(dp, dev);
1220 if (ret)
1221 return ret;
1222
1223 ret = component_add(dev, &cdn_dp_component_ops);
1224 if (ret)
1225 goto err_audio_deinit;
1226
1227 return 0;
1228
1229 err_audio_deinit:
1230 platform_device_unregister(dp->audio_pdev);
1231 return ret;
1232 }
1233
1234 static void cdn_dp_remove(struct platform_device *pdev)
1235 {
1236 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1237
1238 platform_device_unregister(dp->audio_pdev);
1239 cdn_dp_suspend(dp->dev);
1240 component_del(&pdev->dev, &cdn_dp_component_ops);
1241 }
1242
1243 static void cdn_dp_shutdown(struct platform_device *pdev)
1244 {
1245 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1246
1247 cdn_dp_suspend(dp->dev);
1248 }
1249
1250 static const struct dev_pm_ops cdn_dp_pm_ops = {
1251 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1252 cdn_dp_resume)
1253 };
1254
1255 struct platform_driver cdn_dp_driver = {
1256 .probe = cdn_dp_probe,
1257 .remove = cdn_dp_remove,
1258 .shutdown = cdn_dp_shutdown,
1259 .driver = {
1260 .name = "cdn-dp",
1261 .of_match_table = cdn_dp_dt_ids,
1262 .pm = &cdn_dp_pm_ops,
1263 },
1264 };
Linux Kernel