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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[cris-mirror.git] / drivers / gpu / drm / rockchip / cdn-dp-core.c
blobec999d9f15f6dac1629d651d0fe2bbd0e5707647
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 UPHY_SEL_BIT 3
47 #define UPHY_SEL_MASK BIT(19)
48 #define DPTX_HPD_SEL (3 << 12)
49 #define DPTX_HPD_DEL (2 << 12)
50 #define DPTX_HPD_SEL_MASK (3 << 28)
51
52 #define CDN_FW_TIMEOUT_MS (64 * 1000)
53 #define CDN_DPCD_TIMEOUT_MS 5000
54 #define CDN_DP_FIRMWARE "rockchip/dptx.bin"
55
56 struct cdn_dp_data {
57 u8 max_phy;
58 };
59
60 struct cdn_dp_data rk3399_cdn_dp = {
61 .max_phy = 2,
62 };
63
64 static const struct of_device_id cdn_dp_dt_ids[] = {
65 { .compatible = "rockchip,rk3399-cdn-dp",
66 .data = (void *)&rk3399_cdn_dp },
67 {}
68 };
69
70 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
71
72 static int cdn_dp_grf_write(struct cdn_dp_device *dp,
73 unsigned int reg, unsigned int val)
74 {
75 int ret;
76
77 ret = clk_prepare_enable(dp->grf_clk);
78 if (ret) {
79 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
80 return ret;
81 }
82
83 ret = regmap_write(dp->grf, reg, val);
84 if (ret) {
85 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
86 return ret;
87 }
88
89 clk_disable_unprepare(dp->grf_clk);
90
91 return 0;
92 }
93
94 static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
95 {
96 int ret;
97 unsigned long rate;
98
99 ret = clk_prepare_enable(dp->pclk);
100 if (ret < 0) {
101 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
102 goto err_pclk;
103 }
104
105 ret = clk_prepare_enable(dp->core_clk);
106 if (ret < 0) {
107 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
108 goto err_core_clk;
109 }
110
111 ret = pm_runtime_get_sync(dp->dev);
112 if (ret < 0) {
113 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
114 goto err_pm_runtime_get;
115 }
116
117 reset_control_assert(dp->core_rst);
118 reset_control_assert(dp->dptx_rst);
119 reset_control_assert(dp->apb_rst);
120 reset_control_deassert(dp->core_rst);
121 reset_control_deassert(dp->dptx_rst);
122 reset_control_deassert(dp->apb_rst);
123
124 rate = clk_get_rate(dp->core_clk);
125 if (!rate) {
126 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
127 ret = -EINVAL;
128 goto err_set_rate;
129 }
130
131 cdn_dp_set_fw_clk(dp, rate);
132 cdn_dp_clock_reset(dp);
133
134 return 0;
135
136 err_set_rate:
137 pm_runtime_put(dp->dev);
138 err_pm_runtime_get:
139 clk_disable_unprepare(dp->core_clk);
140 err_core_clk:
141 clk_disable_unprepare(dp->pclk);
142 err_pclk:
143 return ret;
144 }
145
146 static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
147 {
148 pm_runtime_put_sync(dp->dev);
149 clk_disable_unprepare(dp->pclk);
150 clk_disable_unprepare(dp->core_clk);
151 }
152
153 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
154 {
155 struct extcon_dev *edev = port->extcon;
156 union extcon_property_value property;
157 int dptx;
158 u8 lanes;
159
160 dptx = extcon_get_state(edev, EXTCON_DISP_DP);
161 if (dptx > 0) {
162 extcon_get_property(edev, EXTCON_DISP_DP,
163 EXTCON_PROP_USB_SS, &property);
164 if (property.intval)
165 lanes = 2;
166 else
167 lanes = 4;
168 } else {
169 lanes = 0;
170 }
171
172 return lanes;
173 }
174
175 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
176 {
177 int ret;
178 u8 value;
179
180 *sink_count = 0;
181 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
182 if (ret)
183 return ret;
184
185 *sink_count = DP_GET_SINK_COUNT(value);
186 return 0;
187 }
188
189 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
190 {
191 struct cdn_dp_port *port;
192 int i, lanes;
193
194 for (i = 0; i < dp->ports; i++) {
195 port = dp->port[i];
196 lanes = cdn_dp_get_port_lanes(port);
197 if (lanes)
198 return port;
199 }
200 return NULL;
201 }
202
203 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
204 {
205 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
206 struct cdn_dp_port *port;
207 u8 sink_count = 0;
208
209 if (dp->active_port < 0 || dp->active_port >= dp->ports) {
210 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
211 return false;
212 }
213
214 port = dp->port[dp->active_port];
215
216 /*
217 * Attempt to read sink count, retry in case the sink may not be ready.
218 *
219 * Sinks are *supposed* to come up within 1ms from an off state, but
220 * some docks need more time to power up.
221 */
222 while (time_before(jiffies, timeout)) {
223 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
224 return false;
225
226 if (!cdn_dp_get_sink_count(dp, &sink_count))
227 return sink_count ? true : false;
228
229 usleep_range(5000, 10000);
230 }
231
232 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
233 return false;
234 }
235
236 static enum drm_connector_status
237 cdn_dp_connector_detect(struct drm_connector *connector, bool force)
238 {
239 struct cdn_dp_device *dp = connector_to_dp(connector);
240 enum drm_connector_status status = connector_status_disconnected;
241
242 mutex_lock(&dp->lock);
243 if (dp->connected)
244 status = connector_status_connected;
245 mutex_unlock(&dp->lock);
246
247 return status;
248 }
249
250 static void cdn_dp_connector_destroy(struct drm_connector *connector)
251 {
252 drm_connector_unregister(connector);
253 drm_connector_cleanup(connector);
254 }
255
256 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
257 .detect = cdn_dp_connector_detect,
258 .destroy = cdn_dp_connector_destroy,
259 .fill_modes = drm_helper_probe_single_connector_modes,
260 .reset = drm_atomic_helper_connector_reset,
261 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
262 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
263 };
264
265 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
266 {
267 struct cdn_dp_device *dp = connector_to_dp(connector);
268 struct edid *edid;
269 int ret = 0;
270
271 mutex_lock(&dp->lock);
272 edid = dp->edid;
273 if (edid) {
274 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
275 edid->width_cm, edid->height_cm);
276
277 dp->sink_has_audio = drm_detect_monitor_audio(edid);
278 ret = drm_add_edid_modes(connector, edid);
279 if (ret)
280 drm_mode_connector_update_edid_property(connector,
281 edid);
282 }
283 mutex_unlock(&dp->lock);
284
285 return ret;
286 }
287
288 static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
289 struct drm_display_mode *mode)
290 {
291 struct cdn_dp_device *dp = connector_to_dp(connector);
292 struct drm_display_info *display_info = &dp->connector.display_info;
293 u32 requested, actual, rate, sink_max, source_max = 0;
294 u8 lanes, bpc;
295
296 /* If DP is disconnected, every mode is invalid */
297 if (!dp->connected)
298 return MODE_BAD;
299
300 switch (display_info->bpc) {
301 case 10:
302 bpc = 10;
303 break;
304 case 6:
305 bpc = 6;
306 break;
307 default:
308 bpc = 8;
309 break;
310 }
311
312 requested = mode->clock * bpc * 3 / 1000;
313
314 source_max = dp->lanes;
315 sink_max = drm_dp_max_lane_count(dp->dpcd);
316 lanes = min(source_max, sink_max);
317
318 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
319 sink_max = drm_dp_max_link_rate(dp->dpcd);
320 rate = min(source_max, sink_max);
321
322 actual = rate * lanes / 100;
323
324 /* efficiency is about 0.8 */
325 actual = actual * 8 / 10;
326
327 if (requested > actual) {
328 DRM_DEV_DEBUG_KMS(dp->dev,
329 "requested=%d, actual=%d, clock=%d\n",
330 requested, actual, mode->clock);
331 return MODE_CLOCK_HIGH;
332 }
333
334 return MODE_OK;
335 }
336
337 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
338 .get_modes = cdn_dp_connector_get_modes,
339 .mode_valid = cdn_dp_connector_mode_valid,
340 };
341
342 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
343 {
344 int ret;
345 const u32 *iram_data, *dram_data;
346 const struct firmware *fw = dp->fw;
347 const struct cdn_firmware_header *hdr;
348
349 hdr = (struct cdn_firmware_header *)fw->data;
350 if (fw->size != le32_to_cpu(hdr->size_bytes)) {
351 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
352 return -EINVAL;
353 }
354
355 iram_data = (const u32 *)(fw->data + hdr->header_size);
356 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
357
358 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
359 dram_data, hdr->dram_size);
360 if (ret)
361 return ret;
362
363 ret = cdn_dp_set_firmware_active(dp, true);
364 if (ret) {
365 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
366 return ret;
367 }
368
369 return cdn_dp_event_config(dp);
370 }
371
372 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
373 {
374 int ret;
375
376 if (!cdn_dp_check_sink_connection(dp))
377 return -ENODEV;
378
379 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
380 DP_RECEIVER_CAP_SIZE);
381 if (ret) {
382 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
383 return ret;
384 }
385
386 kfree(dp->edid);
387 dp->edid = drm_do_get_edid(&dp->connector,
388 cdn_dp_get_edid_block, dp);
389 return 0;
390 }
391
392 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
393 {
394 union extcon_property_value property;
395 int ret;
396
397 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
398 (port->id << UPHY_SEL_BIT) | UPHY_SEL_MASK);
399 if (ret)
400 return ret;
401
402 if (!port->phy_enabled) {
403 ret = phy_power_on(port->phy);
404 if (ret) {
405 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
406 ret);
407 goto err_phy;
408 }
409 port->phy_enabled = true;
410 }
411
412 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
413 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
414 if (ret) {
415 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
416 goto err_power_on;
417 }
418
419 ret = cdn_dp_get_hpd_status(dp);
420 if (ret <= 0) {
421 if (!ret)
422 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
423 goto err_power_on;
424 }
425
426 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
427 EXTCON_PROP_USB_TYPEC_POLARITY, &property);
428 if (ret) {
429 DRM_DEV_ERROR(dp->dev, "get property failed\n");
430 goto err_power_on;
431 }
432
433 port->lanes = cdn_dp_get_port_lanes(port);
434 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
435 if (ret) {
436 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
437 ret);
438 goto err_power_on;
439 }
440
441 dp->active_port = port->id;
442 return 0;
443
444 err_power_on:
445 if (phy_power_off(port->phy))
446 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
447 else
448 port->phy_enabled = false;
449
450 err_phy:
451 cdn_dp_grf_write(dp, GRF_SOC_CON26,
452 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
453 return ret;
454 }
455
456 static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
457 struct cdn_dp_port *port)
458 {
459 int ret;
460
461 if (port->phy_enabled) {
462 ret = phy_power_off(port->phy);
463 if (ret) {
464 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
465 return ret;
466 }
467 }
468
469 port->phy_enabled = false;
470 port->lanes = 0;
471 dp->active_port = -1;
472 return 0;
473 }
474
475 static int cdn_dp_disable(struct cdn_dp_device *dp)
476 {
477 int ret, i;
478
479 if (!dp->active)
480 return 0;
481
482 for (i = 0; i < dp->ports; i++)
483 cdn_dp_disable_phy(dp, dp->port[i]);
484
485 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
486 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
487 if (ret) {
488 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
489 ret);
490 return ret;
491 }
492
493 cdn_dp_set_firmware_active(dp, false);
494 cdn_dp_clk_disable(dp);
495 dp->active = false;
496 dp->link.rate = 0;
497 dp->link.num_lanes = 0;
498 if (!dp->connected) {
499 kfree(dp->edid);
500 dp->edid = NULL;
501 }
502
503 return 0;
504 }
505
506 static int cdn_dp_enable(struct cdn_dp_device *dp)
507 {
508 int ret, i, lanes;
509 struct cdn_dp_port *port;
510
511 port = cdn_dp_connected_port(dp);
512 if (!port) {
513 DRM_DEV_ERROR(dp->dev,
514 "Can't enable without connection\n");
515 return -ENODEV;
516 }
517
518 if (dp->active)
519 return 0;
520
521 ret = cdn_dp_clk_enable(dp);
522 if (ret)
523 return ret;
524
525 ret = cdn_dp_firmware_init(dp);
526 if (ret) {
527 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
528 goto err_clk_disable;
529 }
530
531 /* only enable the port that connected with downstream device */
532 for (i = port->id; i < dp->ports; i++) {
533 port = dp->port[i];
534 lanes = cdn_dp_get_port_lanes(port);
535 if (lanes) {
536 ret = cdn_dp_enable_phy(dp, port);
537 if (ret)
538 continue;
539
540 ret = cdn_dp_get_sink_capability(dp);
541 if (ret) {
542 cdn_dp_disable_phy(dp, port);
543 } else {
544 dp->active = true;
545 dp->lanes = port->lanes;
546 return 0;
547 }
548 }
549 }
550
551 err_clk_disable:
552 cdn_dp_clk_disable(dp);
553 return ret;
554 }
555
556 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
557 struct drm_display_mode *mode,
558 struct drm_display_mode *adjusted)
559 {
560 struct cdn_dp_device *dp = encoder_to_dp(encoder);
561 struct drm_display_info *display_info = &dp->connector.display_info;
562 struct video_info *video = &dp->video_info;
563
564 switch (display_info->bpc) {
565 case 10:
566 video->color_depth = 10;
567 break;
568 case 6:
569 video->color_depth = 6;
570 break;
571 default:
572 video->color_depth = 8;
573 break;
574 }
575
576 video->color_fmt = PXL_RGB;
577 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
578 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
579
580 memcpy(&dp->mode, adjusted, sizeof(*mode));
581 }
582
583 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
584 {
585 u8 link_status[DP_LINK_STATUS_SIZE];
586 struct cdn_dp_port *port = cdn_dp_connected_port(dp);
587 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
588
589 if (!port || !dp->link.rate || !dp->link.num_lanes)
590 return false;
591
592 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
593 DP_LINK_STATUS_SIZE)) {
594 DRM_ERROR("Failed to get link status\n");
595 return false;
596 }
597
598 /* if link training is requested we should perform it always */
599 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
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 out:
658 mutex_unlock(&dp->lock);
659 }
660
661 static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
662 {
663 struct cdn_dp_device *dp = encoder_to_dp(encoder);
664 int ret;
665
666 mutex_lock(&dp->lock);
667 if (dp->active) {
668 ret = cdn_dp_disable(dp);
669 if (ret) {
670 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
671 ret);
672 }
673 }
674 mutex_unlock(&dp->lock);
675
676 /*
677 * In the following 2 cases, we need to run the event_work to re-enable
678 * the DP:
679 * 1. If there is not just one port device is connected, and remove one
680 * device from a port, the DP will be disabled here, at this case,
681 * run the event_work to re-open DP for the other port.
682 * 2. If re-training or re-config failed, the DP will be disabled here.
683 * run the event_work to re-connect it.
684 */
685 if (!dp->connected && cdn_dp_connected_port(dp))
686 schedule_work(&dp->event_work);
687 }
688
689 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
690 struct drm_crtc_state *crtc_state,
691 struct drm_connector_state *conn_state)
692 {
693 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
694
695 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
696 s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
697
698 return 0;
699 }
700
701 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
702 .mode_set = cdn_dp_encoder_mode_set,
703 .enable = cdn_dp_encoder_enable,
704 .disable = cdn_dp_encoder_disable,
705 .atomic_check = cdn_dp_encoder_atomic_check,
706 };
707
708 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
709 .destroy = drm_encoder_cleanup,
710 };
711
712 static 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 struct resource *res;
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 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
726 dp->regs = devm_ioremap_resource(dev, res);
727 if (IS_ERR(dp->regs)) {
728 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
729 return PTR_ERR(dp->regs);
730 }
731
732 dp->core_clk = devm_clk_get(dev, "core-clk");
733 if (IS_ERR(dp->core_clk)) {
734 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
735 return PTR_ERR(dp->core_clk);
736 }
737
738 dp->pclk = devm_clk_get(dev, "pclk");
739 if (IS_ERR(dp->pclk)) {
740 DRM_DEV_ERROR(dev, "cannot get pclk\n");
741 return PTR_ERR(dp->pclk);
742 }
743
744 dp->spdif_clk = devm_clk_get(dev, "spdif");
745 if (IS_ERR(dp->spdif_clk)) {
746 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
747 return PTR_ERR(dp->spdif_clk);
748 }
749
750 dp->grf_clk = devm_clk_get(dev, "grf");
751 if (IS_ERR(dp->grf_clk)) {
752 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
753 return PTR_ERR(dp->grf_clk);
754 }
755
756 dp->spdif_rst = devm_reset_control_get(dev, "spdif");
757 if (IS_ERR(dp->spdif_rst)) {
758 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
759 return PTR_ERR(dp->spdif_rst);
760 }
761
762 dp->dptx_rst = devm_reset_control_get(dev, "dptx");
763 if (IS_ERR(dp->dptx_rst)) {
764 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
765 return PTR_ERR(dp->dptx_rst);
766 }
767
768 dp->core_rst = devm_reset_control_get(dev, "core");
769 if (IS_ERR(dp->core_rst)) {
770 DRM_DEV_ERROR(dev, "no core reset control found\n");
771 return PTR_ERR(dp->core_rst);
772 }
773
774 dp->apb_rst = devm_reset_control_get(dev, "apb");
775 if (IS_ERR(dp->apb_rst)) {
776 DRM_DEV_ERROR(dev, "no apb reset control found\n");
777 return PTR_ERR(dp->apb_rst);
778 }
779
780 return 0;
781 }
782
783 static int cdn_dp_audio_hw_params(struct device *dev, void *data,
784 struct hdmi_codec_daifmt *daifmt,
785 struct hdmi_codec_params *params)
786 {
787 struct cdn_dp_device *dp = dev_get_drvdata(dev);
788 struct audio_info audio = {
789 .sample_width = params->sample_width,
790 .sample_rate = params->sample_rate,
791 .channels = params->channels,
792 };
793 int ret;
794
795 mutex_lock(&dp->lock);
796 if (!dp->active) {
797 ret = -ENODEV;
798 goto out;
799 }
800
801 switch (daifmt->fmt) {
802 case HDMI_I2S:
803 audio.format = AFMT_I2S;
804 break;
805 case HDMI_SPDIF:
806 audio.format = AFMT_SPDIF;
807 break;
808 default:
809 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
810 ret = -EINVAL;
811 goto out;
812 }
813
814 ret = cdn_dp_audio_config(dp, &audio);
815 if (!ret)
816 dp->audio_info = audio;
817
818 out:
819 mutex_unlock(&dp->lock);
820 return ret;
821 }
822
823 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
824 {
825 struct cdn_dp_device *dp = dev_get_drvdata(dev);
826 int ret;
827
828 mutex_lock(&dp->lock);
829 if (!dp->active)
830 goto out;
831
832 ret = cdn_dp_audio_stop(dp, &dp->audio_info);
833 if (!ret)
834 dp->audio_info.format = AFMT_UNUSED;
835 out:
836 mutex_unlock(&dp->lock);
837 }
838
839 static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
840 bool enable)
841 {
842 struct cdn_dp_device *dp = dev_get_drvdata(dev);
843 int ret;
844
845 mutex_lock(&dp->lock);
846 if (!dp->active) {
847 ret = -ENODEV;
848 goto out;
849 }
850
851 ret = cdn_dp_audio_mute(dp, enable);
852
853 out:
854 mutex_unlock(&dp->lock);
855 return ret;
856 }
857
858 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
859 u8 *buf, size_t len)
860 {
861 struct cdn_dp_device *dp = dev_get_drvdata(dev);
862
863 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
864
865 return 0;
866 }
867
868 static const struct hdmi_codec_ops audio_codec_ops = {
869 .hw_params = cdn_dp_audio_hw_params,
870 .audio_shutdown = cdn_dp_audio_shutdown,
871 .digital_mute = cdn_dp_audio_digital_mute,
872 .get_eld = cdn_dp_audio_get_eld,
873 };
874
875 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
876 struct device *dev)
877 {
878 struct hdmi_codec_pdata codec_data = {
879 .i2s = 1,
880 .spdif = 1,
881 .ops = &audio_codec_ops,
882 .max_i2s_channels = 8,
883 };
884
885 dp->audio_pdev = platform_device_register_data(
886 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
887 &codec_data, sizeof(codec_data));
888
889 return PTR_ERR_OR_ZERO(dp->audio_pdev);
890 }
891
892 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
893 {
894 int ret;
895 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
896 unsigned long sleep = 1000;
897
898 WARN_ON(!mutex_is_locked(&dp->lock));
899
900 if (dp->fw_loaded)
901 return 0;
902
903 /* Drop the lock before getting the firmware to avoid blocking boot */
904 mutex_unlock(&dp->lock);
905
906 while (time_before(jiffies, timeout)) {
907 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
908 if (ret == -ENOENT) {
909 msleep(sleep);
910 sleep *= 2;
911 continue;
912 } else if (ret) {
913 DRM_DEV_ERROR(dp->dev,
914 "failed to request firmware: %d\n", ret);
915 goto out;
916 }
917
918 dp->fw_loaded = true;
919 ret = 0;
920 goto out;
921 }
922
923 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
924 ret = -ETIMEDOUT;
925 out:
926 mutex_lock(&dp->lock);
927 return ret;
928 }
929
930 static void cdn_dp_pd_event_work(struct work_struct *work)
931 {
932 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
933 event_work);
934 struct drm_connector *connector = &dp->connector;
935 enum drm_connector_status old_status;
936
937 int ret;
938
939 mutex_lock(&dp->lock);
940
941 if (dp->suspended)
942 goto out;
943
944 ret = cdn_dp_request_firmware(dp);
945 if (ret)
946 goto out;
947
948 dp->connected = true;
949
950 /* Not connected, notify userspace to disable the block */
951 if (!cdn_dp_connected_port(dp)) {
952 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
953 dp->connected = false;
954
955 /* Connected but not enabled, enable the block */
956 } else if (!dp->active) {
957 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
958 ret = cdn_dp_enable(dp);
959 if (ret) {
960 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
961 dp->connected = false;
962 }
963
964 /* Enabled and connected to a dongle without a sink, notify userspace */
965 } else if (!cdn_dp_check_sink_connection(dp)) {
966 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
967 dp->connected = false;
968
969 /* Enabled and connected with a sink, re-train if requested */
970 } else if (!cdn_dp_check_link_status(dp)) {
971 unsigned int rate = dp->link.rate;
972 unsigned int lanes = dp->link.num_lanes;
973 struct drm_display_mode *mode = &dp->mode;
974
975 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
976 ret = cdn_dp_train_link(dp);
977 if (ret) {
978 dp->connected = false;
979 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
980 goto out;
981 }
982
983 /* If training result is changed, update the video config */
984 if (mode->clock &&
985 (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
986 ret = cdn_dp_config_video(dp);
987 if (ret) {
988 dp->connected = false;
989 DRM_DEV_ERROR(dp->dev,
990 "Failed to config video %d\n",
991 ret);
992 }
993 }
994 }
995
996 out:
997 mutex_unlock(&dp->lock);
998
999 old_status = connector->status;
1000 connector->status = connector->funcs->detect(connector, false);
1001 if (old_status != connector->status)
1002 drm_kms_helper_hotplug_event(dp->drm_dev);
1003 }
1004
1005 static int cdn_dp_pd_event(struct notifier_block *nb,
1006 unsigned long event, void *priv)
1007 {
1008 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1009 event_nb);
1010 struct cdn_dp_device *dp = port->dp;
1011
1012 /*
1013 * It would be nice to be able to just do the work inline right here.
1014 * However, we need to make a bunch of calls that might sleep in order
1015 * to turn on the block/phy, so use a worker instead.
1016 */
1017 schedule_work(&dp->event_work);
1018
1019 return NOTIFY_DONE;
1020 }
1021
1022 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1023 {
1024 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1025 struct drm_encoder *encoder;
1026 struct drm_connector *connector;
1027 struct cdn_dp_port *port;
1028 struct drm_device *drm_dev = data;
1029 int ret, i;
1030
1031 ret = cdn_dp_parse_dt(dp);
1032 if (ret < 0)
1033 return ret;
1034
1035 dp->drm_dev = drm_dev;
1036 dp->connected = false;
1037 dp->active = false;
1038 dp->active_port = -1;
1039 dp->fw_loaded = false;
1040
1041 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1042
1043 encoder = &dp->encoder;
1044
1045 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1046 dev->of_node);
1047 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1048
1049 ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1050 DRM_MODE_ENCODER_TMDS, NULL);
1051 if (ret) {
1052 DRM_ERROR("failed to initialize encoder with drm\n");
1053 return ret;
1054 }
1055
1056 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1057
1058 connector = &dp->connector;
1059 connector->polled = DRM_CONNECTOR_POLL_HPD;
1060 connector->dpms = DRM_MODE_DPMS_OFF;
1061
1062 ret = drm_connector_init(drm_dev, connector,
1063 &cdn_dp_atomic_connector_funcs,
1064 DRM_MODE_CONNECTOR_DisplayPort);
1065 if (ret) {
1066 DRM_ERROR("failed to initialize connector with drm\n");
1067 goto err_free_encoder;
1068 }
1069
1070 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1071
1072 ret = drm_mode_connector_attach_encoder(connector, encoder);
1073 if (ret) {
1074 DRM_ERROR("failed to attach connector and encoder\n");
1075 goto err_free_connector;
1076 }
1077
1078 for (i = 0; i < dp->ports; i++) {
1079 port = dp->port[i];
1080
1081 port->event_nb.notifier_call = cdn_dp_pd_event;
1082 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1083 EXTCON_DISP_DP,
1084 &port->event_nb);
1085 if (ret) {
1086 DRM_DEV_ERROR(dev,
1087 "register EXTCON_DISP_DP notifier err\n");
1088 goto err_free_connector;
1089 }
1090 }
1091
1092 pm_runtime_enable(dev);
1093
1094 schedule_work(&dp->event_work);
1095
1096 return 0;
1097
1098 err_free_connector:
1099 drm_connector_cleanup(connector);
1100 err_free_encoder:
1101 drm_encoder_cleanup(encoder);
1102 return ret;
1103 }
1104
1105 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1106 {
1107 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1108 struct drm_encoder *encoder = &dp->encoder;
1109 struct drm_connector *connector = &dp->connector;
1110
1111 cancel_work_sync(&dp->event_work);
1112 cdn_dp_encoder_disable(encoder);
1113 encoder->funcs->destroy(encoder);
1114 connector->funcs->destroy(connector);
1115
1116 pm_runtime_disable(dev);
1117 if (dp->fw_loaded)
1118 release_firmware(dp->fw);
1119 kfree(dp->edid);
1120 dp->edid = NULL;
1121 }
1122
1123 static const struct component_ops cdn_dp_component_ops = {
1124 .bind = cdn_dp_bind,
1125 .unbind = cdn_dp_unbind,
1126 };
1127
1128 int cdn_dp_suspend(struct device *dev)
1129 {
1130 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1131 int ret = 0;
1132
1133 mutex_lock(&dp->lock);
1134 if (dp->active)
1135 ret = cdn_dp_disable(dp);
1136 dp->suspended = true;
1137 mutex_unlock(&dp->lock);
1138
1139 return ret;
1140 }
1141
1142 int cdn_dp_resume(struct device *dev)
1143 {
1144 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1145
1146 mutex_lock(&dp->lock);
1147 dp->suspended = false;
1148 if (dp->fw_loaded)
1149 schedule_work(&dp->event_work);
1150 mutex_unlock(&dp->lock);
1151
1152 return 0;
1153 }
1154
1155 static int cdn_dp_probe(struct platform_device *pdev)
1156 {
1157 struct device *dev = &pdev->dev;
1158 const struct of_device_id *match;
1159 struct cdn_dp_data *dp_data;
1160 struct cdn_dp_port *port;
1161 struct cdn_dp_device *dp;
1162 struct extcon_dev *extcon;
1163 struct phy *phy;
1164 int i;
1165
1166 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1167 if (!dp)
1168 return -ENOMEM;
1169 dp->dev = dev;
1170
1171 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1172 dp_data = (struct cdn_dp_data *)match->data;
1173
1174 for (i = 0; i < dp_data->max_phy; i++) {
1175 extcon = extcon_get_edev_by_phandle(dev, i);
1176 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1177
1178 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1179 PTR_ERR(phy) == -EPROBE_DEFER)
1180 return -EPROBE_DEFER;
1181
1182 if (IS_ERR(extcon) || IS_ERR(phy))
1183 continue;
1184
1185 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1186 if (!port)
1187 return -ENOMEM;
1188
1189 port->extcon = extcon;
1190 port->phy = phy;
1191 port->dp = dp;
1192 port->id = i;
1193 dp->port[dp->ports++] = port;
1194 }
1195
1196 if (!dp->ports) {
1197 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1198 return -EINVAL;
1199 }
1200
1201 mutex_init(&dp->lock);
1202 dev_set_drvdata(dev, dp);
1203
1204 cdn_dp_audio_codec_init(dp, dev);
1205
1206 return component_add(dev, &cdn_dp_component_ops);
1207 }
1208
1209 static int cdn_dp_remove(struct platform_device *pdev)
1210 {
1211 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1212
1213 platform_device_unregister(dp->audio_pdev);
1214 cdn_dp_suspend(dp->dev);
1215 component_del(&pdev->dev, &cdn_dp_component_ops);
1216
1217 return 0;
1218 }
1219
1220 static void cdn_dp_shutdown(struct platform_device *pdev)
1221 {
1222 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1223
1224 cdn_dp_suspend(dp->dev);
1225 }
1226
1227 static const struct dev_pm_ops cdn_dp_pm_ops = {
1228 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1229 cdn_dp_resume)
1230 };
1231
1232 struct platform_driver cdn_dp_driver = {
1233 .probe = cdn_dp_probe,
1234 .remove = cdn_dp_remove,
1235 .shutdown = cdn_dp_shutdown,
1236 .driver = {
1237 .name = "cdn-dp",
1238 .owner = THIS_MODULE,
1239 .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1240 .pm = &cdn_dp_pm_ops,
1241 },
1242 };
CRIS linux kernel tree