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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2019-2022 MediaTek Inc.
4 * Copyright (c) 2022 BayLibre
5 */
6
7#include <drm/display/drm_dp_aux_bus.h>
8#include <drm/display/drm_dp.h>
9#include <drm/display/drm_dp_helper.h>
10#include <drm/drm_atomic_helper.h>
11#include <drm/drm_bridge.h>
12#include <drm/drm_crtc.h>
13#include <drm/drm_edid.h>
14#include <drm/drm_of.h>
15#include <drm/drm_panel.h>
16#include <drm/drm_print.h>
17#include <drm/drm_probe_helper.h>
18#include <linux/arm-smccc.h>
19#include <linux/clk.h>
20#include <linux/delay.h>
21#include <linux/errno.h>
22#include <linux/kernel.h>
23#include <linux/media-bus-format.h>
24#include <linux/nvmem-consumer.h>
25#include <linux/of.h>
26#include <linux/of_irq.h>
27#include <linux/of_platform.h>
28#include <linux/phy/phy.h>
29#include <linux/platform_device.h>
30#include <linux/pm_runtime.h>
31#include <linux/regmap.h>
32#include <linux/soc/mediatek/mtk_sip_svc.h>
33#include <sound/hdmi-codec.h>
34#include <video/videomode.h>
35
36#include "mtk_dp_reg.h"
37
38#define MTK_DP_SIP_CONTROL_AARCH32 MTK_SIP_SMC_CMD(0x523)
39#define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE (BIT(0) | BIT(5))
40#define MTK_DP_SIP_ATF_VIDEO_UNMUTE BIT(5)
41
42#define MTK_DP_THREAD_CABLE_STATE_CHG BIT(0)
43#define MTK_DP_THREAD_HPD_EVENT BIT(1)
44
45#define MTK_DP_4P1T 4
46#define MTK_DP_HDE 2
47#define MTK_DP_PIX_PER_ADDR 2
48#define MTK_DP_AUX_WAIT_REPLY_COUNT 20
49#define MTK_DP_TBC_BUF_READ_START_ADDR 0x8
50#define MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY 5
51#define MTK_DP_TRAIN_DOWNSCALE_RETRY 10
52#define MTK_DP_VERSION 0x11
53#define MTK_DP_SDP_AUI 0x4
54
55enum {
56 MTK_DP_CAL_GLB_BIAS_TRIM = 0,
57 MTK_DP_CAL_CLKTX_IMPSE,
58 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0,
59 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1,
60 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2,
61 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3,
62 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0,
63 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1,
64 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2,
65 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3,
66 MTK_DP_CAL_MAX,
67};
68
69struct mtk_dp_train_info {
70 bool sink_ssc;
71 bool cable_plugged_in;
72 /* link_rate is in multiple of 0.27Gbps */
73 int link_rate;
74 int lane_count;
75 unsigned int channel_eq_pattern;
76};
77
78struct mtk_dp_audio_cfg {
79 bool detect_monitor;
80 int sad_count;
81 int sample_rate;
82 int word_length_bits;
83 int channels;
84};
85
86struct mtk_dp_info {
87 enum dp_pixelformat format;
88 struct videomode vm;
89 struct mtk_dp_audio_cfg audio_cur_cfg;
90};
91
92struct mtk_dp_efuse_fmt {
93 unsigned short idx;
94 unsigned short shift;
95 unsigned short mask;
96 unsigned short min_val;
97 unsigned short max_val;
98 unsigned short default_val;
99};
100
101struct mtk_dp {
102 bool enabled;
103 bool need_debounce;
104 int irq;
105 u8 max_lanes;
106 u8 max_linkrate;
107 u8 rx_cap[DP_RECEIVER_CAP_SIZE];
108 u32 cal_data[MTK_DP_CAL_MAX];
109 u32 irq_thread_handle;
110 /* irq_thread_lock is used to protect irq_thread_handle */
111 spinlock_t irq_thread_lock;
112
113 struct device *dev;
114 struct drm_bridge bridge;
115 struct drm_bridge *next_bridge;
116 struct drm_connector *conn;
117 struct drm_device *drm_dev;
118 struct drm_dp_aux aux;
119
120 const struct mtk_dp_data *data;
121 struct mtk_dp_info info;
122 struct mtk_dp_train_info train_info;
123
124 struct platform_device *phy_dev;
125 struct phy *phy;
126 struct regmap *regs;
127 struct timer_list debounce_timer;
128
129 /* For audio */
130 bool audio_enable;
131 hdmi_codec_plugged_cb plugged_cb;
132 struct platform_device *audio_pdev;
133
134 struct device *codec_dev;
135 /* protect the plugged_cb as it's used in both bridge ops and audio */
136 struct mutex update_plugged_status_lock;
137};
138
139struct mtk_dp_data {
140 int bridge_type;
141 unsigned int smc_cmd;
142 const struct mtk_dp_efuse_fmt *efuse_fmt;
143 bool audio_supported;
144 bool audio_pkt_in_hblank_area;
145 u16 audio_m_div2_bit;
146};
147
148static const struct mtk_dp_efuse_fmt mt8188_dp_efuse_fmt[MTK_DP_CAL_MAX] = {
149 [MTK_DP_CAL_GLB_BIAS_TRIM] = {
150 .idx = 0,
151 .shift = 10,
152 .mask = 0x1f,
153 .min_val = 1,
154 .max_val = 0x1e,
155 .default_val = 0xf,
156 },
157 [MTK_DP_CAL_CLKTX_IMPSE] = {
158 .idx = 0,
159 .shift = 15,
160 .mask = 0xf,
161 .min_val = 1,
162 .max_val = 0xe,
163 .default_val = 0x8,
164 },
165 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
166 .idx = 1,
167 .shift = 0,
168 .mask = 0xf,
169 .min_val = 1,
170 .max_val = 0xe,
171 .default_val = 0x8,
172 },
173 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
174 .idx = 1,
175 .shift = 8,
176 .mask = 0xf,
177 .min_val = 1,
178 .max_val = 0xe,
179 .default_val = 0x8,
180 },
181 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
182 .idx = 1,
183 .shift = 16,
184 .mask = 0xf,
185 .min_val = 1,
186 .max_val = 0xe,
187 .default_val = 0x8,
188 },
189 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
190 .idx = 1,
191 .shift = 24,
192 .mask = 0xf,
193 .min_val = 1,
194 .max_val = 0xe,
195 .default_val = 0x8,
196 },
197 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
198 .idx = 1,
199 .shift = 4,
200 .mask = 0xf,
201 .min_val = 1,
202 .max_val = 0xe,
203 .default_val = 0x8,
204 },
205 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
206 .idx = 1,
207 .shift = 12,
208 .mask = 0xf,
209 .min_val = 1,
210 .max_val = 0xe,
211 .default_val = 0x8,
212 },
213 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
214 .idx = 1,
215 .shift = 20,
216 .mask = 0xf,
217 .min_val = 1,
218 .max_val = 0xe,
219 .default_val = 0x8,
220 },
221 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
222 .idx = 1,
223 .shift = 28,
224 .mask = 0xf,
225 .min_val = 1,
226 .max_val = 0xe,
227 .default_val = 0x8,
228 },
229};
230
231static const struct mtk_dp_efuse_fmt mt8195_edp_efuse_fmt[MTK_DP_CAL_MAX] = {
232 [MTK_DP_CAL_GLB_BIAS_TRIM] = {
233 .idx = 3,
234 .shift = 27,
235 .mask = 0x1f,
236 .min_val = 1,
237 .max_val = 0x1e,
238 .default_val = 0xf,
239 },
240 [MTK_DP_CAL_CLKTX_IMPSE] = {
241 .idx = 0,
242 .shift = 9,
243 .mask = 0xf,
244 .min_val = 1,
245 .max_val = 0xe,
246 .default_val = 0x8,
247 },
248 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
249 .idx = 2,
250 .shift = 28,
251 .mask = 0xf,
252 .min_val = 1,
253 .max_val = 0xe,
254 .default_val = 0x8,
255 },
256 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
257 .idx = 2,
258 .shift = 20,
259 .mask = 0xf,
260 .min_val = 1,
261 .max_val = 0xe,
262 .default_val = 0x8,
263 },
264 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
265 .idx = 2,
266 .shift = 12,
267 .mask = 0xf,
268 .min_val = 1,
269 .max_val = 0xe,
270 .default_val = 0x8,
271 },
272 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
273 .idx = 2,
274 .shift = 4,
275 .mask = 0xf,
276 .min_val = 1,
277 .max_val = 0xe,
278 .default_val = 0x8,
279 },
280 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
281 .idx = 2,
282 .shift = 24,
283 .mask = 0xf,
284 .min_val = 1,
285 .max_val = 0xe,
286 .default_val = 0x8,
287 },
288 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
289 .idx = 2,
290 .shift = 16,
291 .mask = 0xf,
292 .min_val = 1,
293 .max_val = 0xe,
294 .default_val = 0x8,
295 },
296 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
297 .idx = 2,
298 .shift = 8,
299 .mask = 0xf,
300 .min_val = 1,
301 .max_val = 0xe,
302 .default_val = 0x8,
303 },
304 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
305 .idx = 2,
306 .shift = 0,
307 .mask = 0xf,
308 .min_val = 1,
309 .max_val = 0xe,
310 .default_val = 0x8,
311 },
312};
313
314static const struct mtk_dp_efuse_fmt mt8195_dp_efuse_fmt[MTK_DP_CAL_MAX] = {
315 [MTK_DP_CAL_GLB_BIAS_TRIM] = {
316 .idx = 0,
317 .shift = 27,
318 .mask = 0x1f,
319 .min_val = 1,
320 .max_val = 0x1e,
321 .default_val = 0xf,
322 },
323 [MTK_DP_CAL_CLKTX_IMPSE] = {
324 .idx = 0,
325 .shift = 13,
326 .mask = 0xf,
327 .min_val = 1,
328 .max_val = 0xe,
329 .default_val = 0x8,
330 },
331 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
332 .idx = 1,
333 .shift = 28,
334 .mask = 0xf,
335 .min_val = 1,
336 .max_val = 0xe,
337 .default_val = 0x8,
338 },
339 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
340 .idx = 1,
341 .shift = 20,
342 .mask = 0xf,
343 .min_val = 1,
344 .max_val = 0xe,
345 .default_val = 0x8,
346 },
347 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
348 .idx = 1,
349 .shift = 12,
350 .mask = 0xf,
351 .min_val = 1,
352 .max_val = 0xe,
353 .default_val = 0x8,
354 },
355 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
356 .idx = 1,
357 .shift = 4,
358 .mask = 0xf,
359 .min_val = 1,
360 .max_val = 0xe,
361 .default_val = 0x8,
362 },
363 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
364 .idx = 1,
365 .shift = 24,
366 .mask = 0xf,
367 .min_val = 1,
368 .max_val = 0xe,
369 .default_val = 0x8,
370 },
371 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
372 .idx = 1,
373 .shift = 16,
374 .mask = 0xf,
375 .min_val = 1,
376 .max_val = 0xe,
377 .default_val = 0x8,
378 },
379 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
380 .idx = 1,
381 .shift = 8,
382 .mask = 0xf,
383 .min_val = 1,
384 .max_val = 0xe,
385 .default_val = 0x8,
386 },
387 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
388 .idx = 1,
389 .shift = 0,
390 .mask = 0xf,
391 .min_val = 1,
392 .max_val = 0xe,
393 .default_val = 0x8,
394 },
395};
396
397static const struct regmap_config mtk_dp_regmap_config = {
398 .reg_bits = 32,
399 .val_bits = 32,
400 .reg_stride = 4,
401 .max_register = SEC_OFFSET + 0x90,
402 .name = "mtk-dp-registers",
403};
404
405static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b)
406{
407 return container_of(b, struct mtk_dp, bridge);
408}
409
410static u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset)
411{
412 u32 read_val;
413 int ret;
414
415 ret = regmap_read(mtk_dp->regs, offset, &read_val);
416 if (ret) {
417 dev_err(mtk_dp->dev, "Failed to read register 0x%x: %d\n",
418 offset, ret);
419 return 0;
420 }
421
422 return read_val;
423}
424
425static int mtk_dp_write(struct mtk_dp *mtk_dp, u32 offset, u32 val)
426{
427 int ret = regmap_write(mtk_dp->regs, offset, val);
428
429 if (ret)
430 dev_err(mtk_dp->dev,
431 "Failed to write register 0x%x with value 0x%x\n",
432 offset, val);
433 return ret;
434}
435
436static int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset,
437 u32 val, u32 mask)
438{
439 int ret = regmap_update_bits(mtk_dp->regs, offset, mask, val);
440
441 if (ret)
442 dev_err(mtk_dp->dev,
443 "Failed to update register 0x%x with value 0x%x, mask 0x%x\n",
444 offset, val, mask);
445 return ret;
446}
447
448static void mtk_dp_bulk_16bit_write(struct mtk_dp *mtk_dp, u32 offset, u8 *buf,
449 size_t length)
450{
451 int i;
452
453 /* 2 bytes per register */
454 for (i = 0; i < length; i += 2) {
455 u32 val = buf[i] | (i + 1 < length ? buf[i + 1] << 8 : 0);
456
457 if (mtk_dp_write(mtk_dp, offset + i * 2, val))
458 return;
459 }
460}
461
462static void mtk_dp_msa_bypass_enable(struct mtk_dp *mtk_dp, bool enable)
463{
464 u32 mask = HTOTAL_SEL_DP_ENC0_P0 | VTOTAL_SEL_DP_ENC0_P0 |
465 HSTART_SEL_DP_ENC0_P0 | VSTART_SEL_DP_ENC0_P0 |
466 HWIDTH_SEL_DP_ENC0_P0 | VHEIGHT_SEL_DP_ENC0_P0 |
467 HSP_SEL_DP_ENC0_P0 | HSW_SEL_DP_ENC0_P0 |
468 VSP_SEL_DP_ENC0_P0 | VSW_SEL_DP_ENC0_P0;
469
470 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030, enable ? 0 : mask, mask);
471}
472
473static void mtk_dp_set_msa(struct mtk_dp *mtk_dp)
474{
475 struct drm_display_mode mode;
476 struct videomode *vm = &mtk_dp->info.vm;
477
478 drm_display_mode_from_videomode(vm, &mode);
479
480 /* horizontal */
481 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3010,
482 mode.htotal, HTOTAL_SW_DP_ENC0_P0_MASK);
483 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3018,
484 vm->hsync_len + vm->hback_porch,
485 HSTART_SW_DP_ENC0_P0_MASK);
486 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
487 vm->hsync_len, HSW_SW_DP_ENC0_P0_MASK);
488 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
489 0, HSP_SW_DP_ENC0_P0_MASK);
490 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3020,
491 vm->hactive, HWIDTH_SW_DP_ENC0_P0_MASK);
492
493 /* vertical */
494 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3014,
495 mode.vtotal, VTOTAL_SW_DP_ENC0_P0_MASK);
496 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_301C,
497 vm->vsync_len + vm->vback_porch,
498 VSTART_SW_DP_ENC0_P0_MASK);
499 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
500 vm->vsync_len, VSW_SW_DP_ENC0_P0_MASK);
501 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
502 0, VSP_SW_DP_ENC0_P0_MASK);
503 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3024,
504 vm->vactive, VHEIGHT_SW_DP_ENC0_P0_MASK);
505
506 /* horizontal */
507 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3064,
508 vm->hactive, HDE_NUM_LAST_DP_ENC0_P0_MASK);
509 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3154,
510 mode.htotal, PGEN_HTOTAL_DP_ENC0_P0_MASK);
511 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3158,
512 vm->hfront_porch,
513 PGEN_HSYNC_RISING_DP_ENC0_P0_MASK);
514 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_315C,
515 vm->hsync_len,
516 PGEN_HSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
517 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3160,
518 vm->hback_porch + vm->hsync_len,
519 PGEN_HFDE_START_DP_ENC0_P0_MASK);
520 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3164,
521 vm->hactive,
522 PGEN_HFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
523
524 /* vertical */
525 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3168,
526 mode.vtotal,
527 PGEN_VTOTAL_DP_ENC0_P0_MASK);
528 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_316C,
529 vm->vfront_porch,
530 PGEN_VSYNC_RISING_DP_ENC0_P0_MASK);
531 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3170,
532 vm->vsync_len,
533 PGEN_VSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
534 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3174,
535 vm->vback_porch + vm->vsync_len,
536 PGEN_VFDE_START_DP_ENC0_P0_MASK);
537 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3178,
538 vm->vactive,
539 PGEN_VFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
540}
541
542static int mtk_dp_set_color_format(struct mtk_dp *mtk_dp,
543 enum dp_pixelformat color_format)
544{
545 u32 val;
546 u32 misc0_color;
547
548 switch (color_format) {
549 case DP_PIXELFORMAT_YUV422:
550 val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR422;
551 misc0_color = DP_COLOR_FORMAT_YCbCr422;
552 break;
553 case DP_PIXELFORMAT_RGB:
554 val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_RGB;
555 misc0_color = DP_COLOR_FORMAT_RGB;
556 break;
557 default:
558 drm_warn(mtk_dp->drm_dev, "Unsupported color format: %d\n",
559 color_format);
560 return -EINVAL;
561 }
562
563 /* update MISC0 */
564 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
565 misc0_color,
566 DP_TEST_COLOR_FORMAT_MASK);
567
568 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
569 val, PIXEL_ENCODE_FORMAT_DP_ENC0_P0_MASK);
570 return 0;
571}
572
573static void mtk_dp_set_color_depth(struct mtk_dp *mtk_dp)
574{
575 /* Only support 8 bits currently */
576 /* Update MISC0 */
577 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
578 DP_MSA_MISC_8_BPC, DP_TEST_BIT_DEPTH_MASK);
579
580 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
581 VIDEO_COLOR_DEPTH_DP_ENC0_P0_8BIT,
582 VIDEO_COLOR_DEPTH_DP_ENC0_P0_MASK);
583}
584
585static void mtk_dp_config_mn_mode(struct mtk_dp *mtk_dp)
586{
587 /* 0: hw mode, 1: sw mode */
588 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
589 0, VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK);
590}
591
592static void mtk_dp_set_sram_read_start(struct mtk_dp *mtk_dp, u32 val)
593{
594 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
595 val, SRAM_START_READ_THRD_DP_ENC0_P0_MASK);
596}
597
598static void mtk_dp_setup_encoder(struct mtk_dp *mtk_dp)
599{
600 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
601 VIDEO_MN_GEN_EN_DP_ENC0_P0,
602 VIDEO_MN_GEN_EN_DP_ENC0_P0);
603 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
604 SDP_DOWN_CNT_DP_ENC0_P0_VAL,
605 SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
606 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
607 SDP_DOWN_CNT_IN_HBLANK_DP_ENC1_P0_VAL,
608 SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
609 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3300,
610 VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL << 8,
611 VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK);
612 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
613 FIFO_READ_START_POINT_DP_ENC1_P0_VAL << 12,
614 FIFO_READ_START_POINT_DP_ENC1_P0_MASK);
615 mtk_dp_write(mtk_dp, MTK_DP_ENC1_P0_3368, DP_ENC1_P0_3368_VAL);
616}
617
618static void mtk_dp_pg_enable(struct mtk_dp *mtk_dp, bool enable)
619{
620 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3038,
621 enable ? VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK : 0,
622 VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK);
623 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31B0,
624 PGEN_PATTERN_SEL_VAL << 4, PGEN_PATTERN_SEL_MASK);
625}
626
627static void mtk_dp_audio_setup_channels(struct mtk_dp *mtk_dp,
628 struct mtk_dp_audio_cfg *cfg)
629{
630 u32 channel_enable_bits;
631
632 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3324,
633 AUDIO_SOURCE_MUX_DP_ENC1_P0_DPRX,
634 AUDIO_SOURCE_MUX_DP_ENC1_P0_MASK);
635
636 /* audio channel count change reset */
637 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4,
638 DP_ENC_DUMMY_RW_1, DP_ENC_DUMMY_RW_1);
639 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3304,
640 AU_PRTY_REGEN_DP_ENC1_P0_MASK |
641 AU_CH_STS_REGEN_DP_ENC1_P0_MASK |
642 AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK,
643 AU_PRTY_REGEN_DP_ENC1_P0_MASK |
644 AU_CH_STS_REGEN_DP_ENC1_P0_MASK |
645 AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK);
646
647 switch (cfg->channels) {
648 case 2:
649 channel_enable_bits = AUDIO_2CH_SEL_DP_ENC0_P0_MASK |
650 AUDIO_2CH_EN_DP_ENC0_P0_MASK;
651 break;
652 case 8:
653 default:
654 channel_enable_bits = AUDIO_8CH_SEL_DP_ENC0_P0_MASK |
655 AUDIO_8CH_EN_DP_ENC0_P0_MASK;
656 break;
657 }
658 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088,
659 channel_enable_bits | AU_EN_DP_ENC0_P0,
660 AUDIO_2CH_SEL_DP_ENC0_P0_MASK |
661 AUDIO_2CH_EN_DP_ENC0_P0_MASK |
662 AUDIO_8CH_SEL_DP_ENC0_P0_MASK |
663 AUDIO_8CH_EN_DP_ENC0_P0_MASK |
664 AU_EN_DP_ENC0_P0);
665
666 /* audio channel count change reset */
667 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4, 0, DP_ENC_DUMMY_RW_1);
668
669 /* enable audio reset */
670 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4,
671 DP_ENC_DUMMY_RW_1_AUDIO_RST_EN,
672 DP_ENC_DUMMY_RW_1_AUDIO_RST_EN);
673}
674
675static void mtk_dp_audio_channel_status_set(struct mtk_dp *mtk_dp,
676 struct mtk_dp_audio_cfg *cfg)
677{
678 struct snd_aes_iec958 iec = { 0 };
679
680 switch (cfg->sample_rate) {
681 case 32000:
682 iec.status[3] = IEC958_AES3_CON_FS_32000;
683 break;
684 case 44100:
685 iec.status[3] = IEC958_AES3_CON_FS_44100;
686 break;
687 case 48000:
688 iec.status[3] = IEC958_AES3_CON_FS_48000;
689 break;
690 case 88200:
691 iec.status[3] = IEC958_AES3_CON_FS_88200;
692 break;
693 case 96000:
694 iec.status[3] = IEC958_AES3_CON_FS_96000;
695 break;
696 case 192000:
697 iec.status[3] = IEC958_AES3_CON_FS_192000;
698 break;
699 default:
700 iec.status[3] = IEC958_AES3_CON_FS_NOTID;
701 break;
702 }
703
704 switch (cfg->word_length_bits) {
705 case 16:
706 iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16;
707 break;
708 case 20:
709 iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16 |
710 IEC958_AES4_CON_MAX_WORDLEN_24;
711 break;
712 case 24:
713 iec.status[4] = IEC958_AES4_CON_WORDLEN_24_20 |
714 IEC958_AES4_CON_MAX_WORDLEN_24;
715 break;
716 default:
717 iec.status[4] = IEC958_AES4_CON_WORDLEN_NOTID;
718 }
719
720 /* IEC 60958 consumer channel status bits */
721 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_308C,
722 0, CH_STATUS_0_DP_ENC0_P0_MASK);
723 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3090,
724 iec.status[3] << 8, CH_STATUS_1_DP_ENC0_P0_MASK);
725 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3094,
726 iec.status[4], CH_STATUS_2_DP_ENC0_P0_MASK);
727}
728
729static void mtk_dp_audio_sdp_asp_set_channels(struct mtk_dp *mtk_dp,
730 int channels)
731{
732 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_312C,
733 (min(8, channels) - 1) << 8,
734 ASP_HB2_DP_ENC0_P0_MASK | ASP_HB3_DP_ENC0_P0_MASK);
735}
736
737static void mtk_dp_audio_set_divider(struct mtk_dp *mtk_dp)
738{
739 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC,
740 mtk_dp->data->audio_m_div2_bit,
741 AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MASK);
742}
743
744static void mtk_dp_sdp_trigger_aui(struct mtk_dp *mtk_dp)
745{
746 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280,
747 MTK_DP_SDP_AUI, SDP_PACKET_TYPE_DP_ENC1_P0_MASK);
748 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280,
749 SDP_PACKET_W_DP_ENC1_P0, SDP_PACKET_W_DP_ENC1_P0);
750}
751
752static void mtk_dp_sdp_set_data(struct mtk_dp *mtk_dp, u8 *data_bytes)
753{
754 mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_ENC1_P0_3200,
755 data_bytes, 0x10);
756}
757
758static void mtk_dp_sdp_set_header_aui(struct mtk_dp *mtk_dp,
759 struct dp_sdp_header *header)
760{
761 u32 db_addr = MTK_DP_ENC0_P0_30D8 + (MTK_DP_SDP_AUI - 1) * 8;
762
763 mtk_dp_bulk_16bit_write(mtk_dp, db_addr, (u8 *)header, 4);
764}
765
766static void mtk_dp_disable_sdp_aui(struct mtk_dp *mtk_dp)
767{
768 /* Disable periodic send */
769 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A8 & 0xfffc, 0,
770 0xff << ((MTK_DP_ENC0_P0_30A8 & 3) * 8));
771}
772
773static void mtk_dp_setup_sdp_aui(struct mtk_dp *mtk_dp,
774 struct dp_sdp *sdp)
775{
776 u32 shift;
777
778 mtk_dp_sdp_set_data(mtk_dp, sdp->db);
779 mtk_dp_sdp_set_header_aui(mtk_dp, &sdp->sdp_header);
780 mtk_dp_disable_sdp_aui(mtk_dp);
781
782 shift = (MTK_DP_ENC0_P0_30A8 & 3) * 8;
783
784 mtk_dp_sdp_trigger_aui(mtk_dp);
785 /* Enable periodic sending */
786 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A8 & 0xfffc,
787 0x05 << shift, 0xff << shift);
788}
789
790static void mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp)
791{
792 mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, DP_AUX_P0_3640_VAL);
793}
794
795static void mtk_dp_aux_set_cmd(struct mtk_dp *mtk_dp, u8 cmd, u32 addr)
796{
797 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3644,
798 cmd, MCU_REQUEST_COMMAND_AUX_TX_P0_MASK);
799 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3648,
800 addr, MCU_REQUEST_ADDRESS_LSB_AUX_TX_P0_MASK);
801 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_364C,
802 addr >> 16, MCU_REQUEST_ADDRESS_MSB_AUX_TX_P0_MASK);
803}
804
805static void mtk_dp_aux_clear_fifo(struct mtk_dp *mtk_dp)
806{
807 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
808 MCU_ACK_TRAN_COMPLETE_AUX_TX_P0,
809 MCU_ACK_TRAN_COMPLETE_AUX_TX_P0 |
810 PHY_FIFO_RST_AUX_TX_P0_MASK |
811 MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
812}
813
814static void mtk_dp_aux_request_ready(struct mtk_dp *mtk_dp)
815{
816 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3630,
817 AUX_TX_REQUEST_READY_AUX_TX_P0,
818 AUX_TX_REQUEST_READY_AUX_TX_P0);
819}
820
821static void mtk_dp_aux_fill_write_fifo(struct mtk_dp *mtk_dp, u8 *buf,
822 size_t length)
823{
824 mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_AUX_P0_3708, buf, length);
825}
826
827static void mtk_dp_aux_read_rx_fifo(struct mtk_dp *mtk_dp, u8 *buf,
828 size_t length, int read_delay)
829{
830 int read_pos;
831
832 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
833 0, AUX_RD_MODE_AUX_TX_P0_MASK);
834
835 for (read_pos = 0; read_pos < length; read_pos++) {
836 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
837 AUX_RX_FIFO_READ_PULSE_TX_P0,
838 AUX_RX_FIFO_READ_PULSE_TX_P0);
839
840 /* Hardware needs time to update the data */
841 usleep_range(read_delay, read_delay * 2);
842 buf[read_pos] = (u8)(mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3620) &
843 AUX_RX_FIFO_READ_DATA_AUX_TX_P0_MASK);
844 }
845}
846
847static void mtk_dp_aux_set_length(struct mtk_dp *mtk_dp, size_t length)
848{
849 if (length > 0) {
850 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
851 (length - 1) << 12,
852 MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
853 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
854 0,
855 AUX_NO_LENGTH_AUX_TX_P0 |
856 AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
857 AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
858 } else {
859 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
860 AUX_NO_LENGTH_AUX_TX_P0,
861 AUX_NO_LENGTH_AUX_TX_P0 |
862 AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
863 AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
864 }
865}
866
867static int mtk_dp_aux_wait_for_completion(struct mtk_dp *mtk_dp, bool is_read)
868{
869 int wait_reply = MTK_DP_AUX_WAIT_REPLY_COUNT;
870
871 while (--wait_reply) {
872 u32 aux_irq_status;
873
874 if (is_read) {
875 u32 fifo_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3618);
876
877 if (fifo_status &
878 (AUX_RX_FIFO_WRITE_POINTER_AUX_TX_P0_MASK |
879 AUX_RX_FIFO_FULL_AUX_TX_P0_MASK)) {
880 return 0;
881 }
882 }
883
884 aux_irq_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3640);
885 if (aux_irq_status & AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0)
886 return 0;
887
888 if (aux_irq_status & AUX_400US_TIMEOUT_IRQ_AUX_TX_P0)
889 return -ETIMEDOUT;
890
891 /* Give the hardware a chance to reach completion before retrying */
892 usleep_range(100, 500);
893 }
894
895 return -ETIMEDOUT;
896}
897
898static int mtk_dp_aux_do_transfer(struct mtk_dp *mtk_dp, bool is_read, u8 cmd,
899 u32 addr, u8 *buf, size_t length, u8 *reply_cmd)
900{
901 int ret;
902
903 if (is_read && (length > DP_AUX_MAX_PAYLOAD_BYTES ||
904 (cmd == DP_AUX_NATIVE_READ && !length)))
905 return -EINVAL;
906
907 if (!is_read)
908 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
909 AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0,
910 AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0);
911
912 /* We need to clear fifo and irq before sending commands to the sink device. */
913 mtk_dp_aux_clear_fifo(mtk_dp);
914 mtk_dp_aux_irq_clear(mtk_dp);
915
916 mtk_dp_aux_set_cmd(mtk_dp, cmd, addr);
917 mtk_dp_aux_set_length(mtk_dp, length);
918
919 if (!is_read) {
920 if (length)
921 mtk_dp_aux_fill_write_fifo(mtk_dp, buf, length);
922
923 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
924 AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK,
925 AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK);
926 }
927
928 mtk_dp_aux_request_ready(mtk_dp);
929
930 /* Wait for feedback from sink device. */
931 ret = mtk_dp_aux_wait_for_completion(mtk_dp, is_read);
932
933 *reply_cmd = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3624) &
934 AUX_RX_REPLY_COMMAND_AUX_TX_P0_MASK;
935
936 if (ret) {
937 u32 phy_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3628) &
938 AUX_RX_PHY_STATE_AUX_TX_P0_MASK;
939 if (phy_status != AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE) {
940 dev_err(mtk_dp->dev,
941 "AUX Rx Aux hang, need SW reset\n");
942 return -EIO;
943 }
944
945 return -ETIMEDOUT;
946 }
947
948 if (!length) {
949 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
950 0,
951 AUX_NO_LENGTH_AUX_TX_P0 |
952 AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
953 AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
954 } else if (is_read) {
955 int read_delay;
956
957 if (cmd == (DP_AUX_I2C_READ | DP_AUX_I2C_MOT) ||
958 cmd == DP_AUX_I2C_READ)
959 read_delay = 500;
960 else
961 read_delay = 100;
962
963 mtk_dp_aux_read_rx_fifo(mtk_dp, buf, length, read_delay);
964 }
965
966 return 0;
967}
968
969static void mtk_dp_set_swing_pre_emphasis(struct mtk_dp *mtk_dp, int lane_num,
970 int swing_val, int preemphasis)
971{
972 u32 lane_shift = lane_num * DP_TX1_VOLT_SWING_SHIFT;
973
974 dev_dbg(mtk_dp->dev,
975 "link training: swing_val = 0x%x, pre-emphasis = 0x%x\n",
976 swing_val, preemphasis);
977
978 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
979 swing_val << (DP_TX0_VOLT_SWING_SHIFT + lane_shift),
980 DP_TX0_VOLT_SWING_MASK << lane_shift);
981 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
982 preemphasis << (DP_TX0_PRE_EMPH_SHIFT + lane_shift),
983 DP_TX0_PRE_EMPH_MASK << lane_shift);
984}
985
986static void mtk_dp_reset_swing_pre_emphasis(struct mtk_dp *mtk_dp)
987{
988 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
989 0,
990 DP_TX0_VOLT_SWING_MASK |
991 DP_TX1_VOLT_SWING_MASK |
992 DP_TX2_VOLT_SWING_MASK |
993 DP_TX3_VOLT_SWING_MASK |
994 DP_TX0_PRE_EMPH_MASK |
995 DP_TX1_PRE_EMPH_MASK |
996 DP_TX2_PRE_EMPH_MASK |
997 DP_TX3_PRE_EMPH_MASK);
998}
999
1000static u32 mtk_dp_swirq_get_clear(struct mtk_dp *mtk_dp)
1001{
1002 u32 irq_status = mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_35D0) &
1003 SW_IRQ_FINAL_STATUS_DP_TRANS_P0_MASK;
1004
1005 if (irq_status) {
1006 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
1007 irq_status, SW_IRQ_CLR_DP_TRANS_P0_MASK);
1008 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
1009 0, SW_IRQ_CLR_DP_TRANS_P0_MASK);
1010 }
1011
1012 return irq_status;
1013}
1014
1015static u32 mtk_dp_hwirq_get_clear(struct mtk_dp *mtk_dp)
1016{
1017 u32 irq_status = (mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3418) &
1018 IRQ_STATUS_DP_TRANS_P0_MASK) >> 12;
1019
1020 if (irq_status) {
1021 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
1022 irq_status, IRQ_CLR_DP_TRANS_P0_MASK);
1023 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
1024 0, IRQ_CLR_DP_TRANS_P0_MASK);
1025 }
1026
1027 return irq_status;
1028}
1029
1030static void mtk_dp_hwirq_enable(struct mtk_dp *mtk_dp, bool enable)
1031{
1032 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
1033 enable ? 0 :
1034 IRQ_MASK_DP_TRANS_P0_DISC_IRQ |
1035 IRQ_MASK_DP_TRANS_P0_CONN_IRQ |
1036 IRQ_MASK_DP_TRANS_P0_INT_IRQ,
1037 IRQ_MASK_DP_TRANS_P0_MASK);
1038}
1039
1040static void mtk_dp_initialize_settings(struct mtk_dp *mtk_dp)
1041{
1042 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_342C,
1043 XTAL_FREQ_DP_TRANS_P0_DEFAULT,
1044 XTAL_FREQ_DP_TRANS_P0_MASK);
1045 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3540,
1046 FEC_CLOCK_EN_MODE_DP_TRANS_P0,
1047 FEC_CLOCK_EN_MODE_DP_TRANS_P0);
1048 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31EC,
1049 AUDIO_CH_SRC_SEL_DP_ENC0_P0,
1050 AUDIO_CH_SRC_SEL_DP_ENC0_P0);
1051 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
1052 0, SDP_VSYNC_RISING_MASK_DP_ENC0_P0_MASK);
1053 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_IRQ_MASK,
1054 IRQ_MASK_AUX_TOP_IRQ, IRQ_MASK_AUX_TOP_IRQ);
1055}
1056
1057static void mtk_dp_initialize_hpd_detect_settings(struct mtk_dp *mtk_dp)
1058{
1059 u32 val;
1060 /* Debounce threshold */
1061 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
1062 8, HPD_DEB_THD_DP_TRANS_P0_MASK);
1063
1064 val = (HPD_INT_THD_DP_TRANS_P0_LOWER_500US |
1065 HPD_INT_THD_DP_TRANS_P0_UPPER_1100US) << 4;
1066 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
1067 val, HPD_INT_THD_DP_TRANS_P0_MASK);
1068
1069 /*
1070 * Connect threshold 1.5ms + 5 x 0.1ms = 2ms
1071 * Disconnect threshold 1.5ms + 5 x 0.1ms = 2ms
1072 */
1073 val = (5 << 8) | (5 << 12);
1074 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
1075 val,
1076 HPD_DISC_THD_DP_TRANS_P0_MASK |
1077 HPD_CONN_THD_DP_TRANS_P0_MASK);
1078 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3430,
1079 HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT,
1080 HPD_INT_THD_ECO_DP_TRANS_P0_MASK);
1081}
1082
1083static void mtk_dp_initialize_aux_settings(struct mtk_dp *mtk_dp)
1084{
1085 /* modify timeout threshold = 0x1595 */
1086 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_360C,
1087 AUX_TIMEOUT_THR_AUX_TX_P0_VAL,
1088 AUX_TIMEOUT_THR_AUX_TX_P0_MASK);
1089 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3658,
1090 0, AUX_TX_OV_EN_AUX_TX_P0_MASK);
1091 /* 25 for 26M */
1092 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3634,
1093 AUX_TX_OVER_SAMPLE_RATE_FOR_26M << 8,
1094 AUX_TX_OVER_SAMPLE_RATE_AUX_TX_P0_MASK);
1095 /* 13 for 26M */
1096 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3614,
1097 AUX_RX_UI_CNT_THR_AUX_FOR_26M,
1098 AUX_RX_UI_CNT_THR_AUX_TX_P0_MASK);
1099 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_37C8,
1100 MTK_ATOP_EN_AUX_TX_P0,
1101 MTK_ATOP_EN_AUX_TX_P0);
1102
1103 /* Set complete reply mode for AUX */
1104 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3690,
1105 RX_REPLY_COMPLETE_MODE_AUX_TX_P0,
1106 RX_REPLY_COMPLETE_MODE_AUX_TX_P0);
1107}
1108
1109static void mtk_dp_initialize_digital_settings(struct mtk_dp *mtk_dp)
1110{
1111 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
1112 0, VBID_VIDEO_MUTE_DP_ENC0_P0_MASK);
1113
1114 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3368,
1115 BS2BS_MODE_DP_ENC1_P0_VAL << 12,
1116 BS2BS_MODE_DP_ENC1_P0_MASK);
1117
1118 /* dp tx encoder reset all sw */
1119 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
1120 DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0,
1121 DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
1122
1123 /* Wait for sw reset to complete */
1124 usleep_range(1000, 5000);
1125 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
1126 0, DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
1127}
1128
1129static void mtk_dp_digital_sw_reset(struct mtk_dp *mtk_dp)
1130{
1131 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
1132 DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0,
1133 DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
1134
1135 /* Wait for sw reset to complete */
1136 usleep_range(1000, 5000);
1137 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
1138 0, DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
1139}
1140
1141static void mtk_dp_set_lanes(struct mtk_dp *mtk_dp, int lanes)
1142{
1143 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35F0,
1144 lanes == 0 ? 0 : DP_TRANS_DUMMY_RW_0,
1145 DP_TRANS_DUMMY_RW_0_MASK);
1146 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
1147 lanes, LANE_NUM_DP_ENC0_P0_MASK);
1148 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4,
1149 lanes << 2, LANE_NUM_DP_TRANS_P0_MASK);
1150}
1151
1152static void mtk_dp_get_calibration_data(struct mtk_dp *mtk_dp)
1153{
1154 const struct mtk_dp_efuse_fmt *fmt;
1155 struct device *dev = mtk_dp->dev;
1156 struct nvmem_cell *cell;
1157 u32 *cal_data = mtk_dp->cal_data;
1158 u32 *buf;
1159 int i;
1160 size_t len;
1161
1162 cell = nvmem_cell_get(dev, "dp_calibration_data");
1163 if (IS_ERR(cell)) {
1164 dev_warn(dev, "Failed to get nvmem cell dp_calibration_data\n");
1165 goto use_default_val;
1166 }
1167
1168 buf = (u32 *)nvmem_cell_read(cell, &len);
1169 nvmem_cell_put(cell);
1170
1171 if (IS_ERR(buf) || ((len / sizeof(u32)) != 4)) {
1172 dev_warn(dev, "Failed to read nvmem_cell_read\n");
1173
1174 if (!IS_ERR(buf))
1175 kfree(buf);
1176
1177 goto use_default_val;
1178 }
1179
1180 for (i = 0; i < MTK_DP_CAL_MAX; i++) {
1181 fmt = &mtk_dp->data->efuse_fmt[i];
1182 cal_data[i] = (buf[fmt->idx] >> fmt->shift) & fmt->mask;
1183
1184 if (cal_data[i] < fmt->min_val || cal_data[i] > fmt->max_val) {
1185 dev_warn(mtk_dp->dev, "Invalid efuse data, idx = %d\n", i);
1186 kfree(buf);
1187 goto use_default_val;
1188 }
1189 }
1190 kfree(buf);
1191
1192 return;
1193
1194use_default_val:
1195 dev_warn(mtk_dp->dev, "Use default calibration data\n");
1196 for (i = 0; i < MTK_DP_CAL_MAX; i++)
1197 cal_data[i] = mtk_dp->data->efuse_fmt[i].default_val;
1198}
1199
1200static void mtk_dp_set_calibration_data(struct mtk_dp *mtk_dp)
1201{
1202 u32 *cal_data = mtk_dp->cal_data;
1203
1204 mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_DPAUX_TX,
1205 cal_data[MTK_DP_CAL_CLKTX_IMPSE] << 20,
1206 RG_CKM_PT0_CKTX_IMPSEL);
1207 mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_BIAS_GEN_00,
1208 cal_data[MTK_DP_CAL_GLB_BIAS_TRIM] << 16,
1209 RG_XTP_GLB_BIAS_INTR_CTRL);
1210 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
1211 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] << 12,
1212 RG_XTP_LN0_TX_IMPSEL_PMOS);
1213 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
1214 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] << 16,
1215 RG_XTP_LN0_TX_IMPSEL_NMOS);
1216 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
1217 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] << 12,
1218 RG_XTP_LN1_TX_IMPSEL_PMOS);
1219 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
1220 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] << 16,
1221 RG_XTP_LN1_TX_IMPSEL_NMOS);
1222 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
1223 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] << 12,
1224 RG_XTP_LN2_TX_IMPSEL_PMOS);
1225 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
1226 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] << 16,
1227 RG_XTP_LN2_TX_IMPSEL_NMOS);
1228 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
1229 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] << 12,
1230 RG_XTP_LN3_TX_IMPSEL_PMOS);
1231 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
1232 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] << 16,
1233 RG_XTP_LN3_TX_IMPSEL_NMOS);
1234}
1235
1236static int mtk_dp_phy_configure(struct mtk_dp *mtk_dp,
1237 u32 link_rate, int lane_count)
1238{
1239 int ret;
1240 union phy_configure_opts phy_opts = {
1241 .dp = {
1242 .link_rate = drm_dp_bw_code_to_link_rate(link_rate) / 100,
1243 .set_rate = 1,
1244 .lanes = lane_count,
1245 .set_lanes = 1,
1246 .ssc = mtk_dp->train_info.sink_ssc,
1247 }
1248 };
1249
1250 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, DP_PWR_STATE_BANDGAP,
1251 DP_PWR_STATE_MASK);
1252
1253 ret = phy_configure(mtk_dp->phy, &phy_opts);
1254 if (ret)
1255 return ret;
1256
1257 mtk_dp_set_calibration_data(mtk_dp);
1258 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1259 DP_PWR_STATE_BANDGAP_TPLL_LANE, DP_PWR_STATE_MASK);
1260
1261 return 0;
1262}
1263
1264static void mtk_dp_set_idle_pattern(struct mtk_dp *mtk_dp, bool enable)
1265{
1266 u32 val = POST_MISC_DATA_LANE0_OV_DP_TRANS_P0_MASK |
1267 POST_MISC_DATA_LANE1_OV_DP_TRANS_P0_MASK |
1268 POST_MISC_DATA_LANE2_OV_DP_TRANS_P0_MASK |
1269 POST_MISC_DATA_LANE3_OV_DP_TRANS_P0_MASK;
1270
1271 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3580,
1272 enable ? val : 0, val);
1273}
1274
1275static void mtk_dp_train_set_pattern(struct mtk_dp *mtk_dp, int pattern)
1276{
1277 /* TPS1 */
1278 if (pattern == 1)
1279 mtk_dp_set_idle_pattern(mtk_dp, false);
1280
1281 mtk_dp_update_bits(mtk_dp,
1282 MTK_DP_TRANS_P0_3400,
1283 pattern ? BIT(pattern - 1) << 12 : 0,
1284 PATTERN1_EN_DP_TRANS_P0_MASK |
1285 PATTERN2_EN_DP_TRANS_P0_MASK |
1286 PATTERN3_EN_DP_TRANS_P0_MASK |
1287 PATTERN4_EN_DP_TRANS_P0_MASK);
1288}
1289
1290static void mtk_dp_set_enhanced_frame_mode(struct mtk_dp *mtk_dp)
1291{
1292 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
1293 ENHANCED_FRAME_EN_DP_ENC0_P0,
1294 ENHANCED_FRAME_EN_DP_ENC0_P0);
1295}
1296
1297static void mtk_dp_training_set_scramble(struct mtk_dp *mtk_dp, bool enable)
1298{
1299 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3404,
1300 enable ? DP_SCR_EN_DP_TRANS_P0_MASK : 0,
1301 DP_SCR_EN_DP_TRANS_P0_MASK);
1302}
1303
1304static void mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable)
1305{
1306 struct arm_smccc_res res;
1307 u32 val = VIDEO_MUTE_SEL_DP_ENC0_P0 |
1308 (enable ? VIDEO_MUTE_SW_DP_ENC0_P0 : 0);
1309
1310 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
1311 val,
1312 VIDEO_MUTE_SEL_DP_ENC0_P0 |
1313 VIDEO_MUTE_SW_DP_ENC0_P0);
1314
1315 arm_smccc_smc(MTK_DP_SIP_CONTROL_AARCH32,
1316 mtk_dp->data->smc_cmd, enable,
1317 0, 0, 0, 0, 0, &res);
1318
1319 dev_dbg(mtk_dp->dev, "smc cmd: 0x%x, p1: %s, ret: 0x%lx-0x%lx\n",
1320 mtk_dp->data->smc_cmd, enable ? "enable" : "disable", res.a0, res.a1);
1321}
1322
1323static void mtk_dp_audio_mute(struct mtk_dp *mtk_dp, bool mute)
1324{
1325 u32 val[3];
1326
1327 if (mute) {
1328 val[0] = VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0 |
1329 VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0;
1330 val[1] = 0;
1331 val[2] = 0;
1332 } else {
1333 val[0] = 0;
1334 val[1] = AU_EN_DP_ENC0_P0;
1335 /* Send one every two frames */
1336 val[2] = 0x0F;
1337 }
1338
1339 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030,
1340 val[0],
1341 VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0 |
1342 VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0);
1343 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088,
1344 val[1], AU_EN_DP_ENC0_P0);
1345 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A4,
1346 val[2], AU_TS_CFG_DP_ENC0_P0_MASK);
1347}
1348
1349static void mtk_dp_aux_panel_poweron(struct mtk_dp *mtk_dp, bool pwron)
1350{
1351 if (pwron) {
1352 /* power on aux */
1353 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1354 DP_PWR_STATE_BANDGAP_TPLL_LANE,
1355 DP_PWR_STATE_MASK);
1356
1357 /* power on panel */
1358 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
1359 usleep_range(2000, 5000);
1360 } else {
1361 /* power off panel */
1362 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
1363 usleep_range(2000, 3000);
1364
1365 /* power off aux */
1366 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1367 DP_PWR_STATE_BANDGAP_TPLL,
1368 DP_PWR_STATE_MASK);
1369 }
1370}
1371
1372static void mtk_dp_power_enable(struct mtk_dp *mtk_dp)
1373{
1374 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
1375 0, SW_RST_B_PHYD);
1376
1377 /* Wait for power enable */
1378 usleep_range(10, 200);
1379
1380 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
1381 SW_RST_B_PHYD, SW_RST_B_PHYD);
1382 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1383 DP_PWR_STATE_BANDGAP_TPLL, DP_PWR_STATE_MASK);
1384 mtk_dp_write(mtk_dp, MTK_DP_1040,
1385 RG_DPAUX_RX_VALID_DEGLITCH_EN | RG_XTP_GLB_CKDET_EN |
1386 RG_DPAUX_RX_EN);
1387 mtk_dp_update_bits(mtk_dp, MTK_DP_0034, 0, DA_CKM_CKTX0_EN_FORCE_EN);
1388}
1389
1390static void mtk_dp_power_disable(struct mtk_dp *mtk_dp)
1391{
1392 mtk_dp_write(mtk_dp, MTK_DP_TOP_PWR_STATE, 0);
1393
1394 mtk_dp_update_bits(mtk_dp, MTK_DP_0034,
1395 DA_CKM_CKTX0_EN_FORCE_EN, DA_CKM_CKTX0_EN_FORCE_EN);
1396
1397 /* Disable RX */
1398 mtk_dp_write(mtk_dp, MTK_DP_1040, 0);
1399 mtk_dp_write(mtk_dp, MTK_DP_TOP_MEM_PD,
1400 0x550 | FUSE_SEL | MEM_ISO_EN);
1401}
1402
1403static void mtk_dp_initialize_priv_data(struct mtk_dp *mtk_dp)
1404{
1405 bool plugged_in = (mtk_dp->bridge.type == DRM_MODE_CONNECTOR_eDP);
1406
1407 mtk_dp->train_info.link_rate = DP_LINK_BW_5_4;
1408 mtk_dp->train_info.lane_count = mtk_dp->max_lanes;
1409 mtk_dp->train_info.cable_plugged_in = plugged_in;
1410
1411 mtk_dp->info.format = DP_PIXELFORMAT_RGB;
1412 memset(&mtk_dp->info.vm, 0, sizeof(struct videomode));
1413 mtk_dp->audio_enable = false;
1414}
1415
1416static void mtk_dp_sdp_set_down_cnt_init(struct mtk_dp *mtk_dp,
1417 u32 sram_read_start)
1418{
1419 u32 sdp_down_cnt_init = 0;
1420 struct drm_display_mode mode;
1421 struct videomode *vm = &mtk_dp->info.vm;
1422
1423 drm_display_mode_from_videomode(vm, &mode);
1424
1425 if (mode.clock > 0)
1426 sdp_down_cnt_init = sram_read_start *
1427 mtk_dp->train_info.link_rate * 2700 * 8 /
1428 (mode.clock * 4);
1429
1430 switch (mtk_dp->train_info.lane_count) {
1431 case 1:
1432 sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 0x1A);
1433 break;
1434 case 2:
1435 /* case for LowResolution && High Audio Sample Rate */
1436 sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 0x10);
1437 sdp_down_cnt_init += mode.vtotal <= 525 ? 4 : 0;
1438 break;
1439 case 4:
1440 default:
1441 sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 6);
1442 break;
1443 }
1444
1445 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
1446 sdp_down_cnt_init,
1447 SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
1448}
1449
1450static void mtk_dp_sdp_set_down_cnt_init_in_hblank(struct mtk_dp *mtk_dp)
1451{
1452 int pix_clk_mhz;
1453 u32 dc_offset;
1454 u32 spd_down_cnt_init = 0;
1455 struct drm_display_mode mode;
1456 struct videomode *vm = &mtk_dp->info.vm;
1457
1458 drm_display_mode_from_videomode(vm, &mode);
1459
1460 pix_clk_mhz = mtk_dp->info.format == DP_PIXELFORMAT_YUV420 ?
1461 mode.clock / 2000 : mode.clock / 1000;
1462
1463 switch (mtk_dp->train_info.lane_count) {
1464 case 1:
1465 spd_down_cnt_init = 0x20;
1466 break;
1467 case 2:
1468 dc_offset = (mode.vtotal <= 525) ? 0x14 : 0x00;
1469 spd_down_cnt_init = 0x18 + dc_offset;
1470 break;
1471 case 4:
1472 default:
1473 dc_offset = (mode.vtotal <= 525) ? 0x08 : 0x00;
1474 if (pix_clk_mhz > mtk_dp->train_info.link_rate * 27)
1475 spd_down_cnt_init = 0x8;
1476 else
1477 spd_down_cnt_init = 0x10 + dc_offset;
1478 break;
1479 }
1480
1481 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364, spd_down_cnt_init,
1482 SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
1483}
1484
1485static void mtk_dp_audio_sample_arrange_disable(struct mtk_dp *mtk_dp)
1486{
1487 /* arrange audio packets into the Hblanking and Vblanking area */
1488 if (!mtk_dp->data->audio_pkt_in_hblank_area)
1489 return;
1490
1491 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3374, 0,
1492 SDP_ASP_INSERT_IN_HBLANK_DP_ENC1_P0_MASK);
1493 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3374, 0,
1494 SDP_DOWN_ASP_CNT_INIT_DP_ENC1_P0_MASK);
1495}
1496
1497static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp)
1498{
1499 u32 sram_read_start = min_t(u32, MTK_DP_TBC_BUF_READ_START_ADDR,
1500 mtk_dp->info.vm.hactive /
1501 mtk_dp->train_info.lane_count /
1502 MTK_DP_4P1T / MTK_DP_HDE /
1503 MTK_DP_PIX_PER_ADDR);
1504 mtk_dp_set_sram_read_start(mtk_dp, sram_read_start);
1505 mtk_dp_setup_encoder(mtk_dp);
1506 mtk_dp_audio_sample_arrange_disable(mtk_dp);
1507 mtk_dp_sdp_set_down_cnt_init_in_hblank(mtk_dp);
1508 mtk_dp_sdp_set_down_cnt_init(mtk_dp, sram_read_start);
1509}
1510
1511static void mtk_dp_set_tx_out(struct mtk_dp *mtk_dp)
1512{
1513 mtk_dp_setup_tu(mtk_dp);
1514}
1515
1516static void mtk_dp_train_update_swing_pre(struct mtk_dp *mtk_dp, int lanes,
1517 u8 dpcd_adjust_req[2])
1518{
1519 int lane;
1520
1521 for (lane = 0; lane < lanes; ++lane) {
1522 u8 val;
1523 u8 swing;
1524 u8 preemphasis;
1525 int index = lane / 2;
1526 int shift = lane % 2 ? DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : 0;
1527
1528 swing = (dpcd_adjust_req[index] >> shift) &
1529 DP_ADJUST_VOLTAGE_SWING_LANE0_MASK;
1530 preemphasis = ((dpcd_adjust_req[index] >> shift) &
1531 DP_ADJUST_PRE_EMPHASIS_LANE0_MASK) >>
1532 DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT;
1533 val = swing << DP_TRAIN_VOLTAGE_SWING_SHIFT |
1534 preemphasis << DP_TRAIN_PRE_EMPHASIS_SHIFT;
1535
1536 if (swing == DP_TRAIN_VOLTAGE_SWING_LEVEL_3)
1537 val |= DP_TRAIN_MAX_SWING_REACHED;
1538 if (preemphasis == 3)
1539 val |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
1540
1541 mtk_dp_set_swing_pre_emphasis(mtk_dp, lane, swing, preemphasis);
1542 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_LANE0_SET + lane,
1543 val);
1544 }
1545}
1546
1547static void mtk_dp_pattern(struct mtk_dp *mtk_dp, bool is_tps1)
1548{
1549 int pattern;
1550 unsigned int aux_offset;
1551
1552 if (is_tps1) {
1553 pattern = 1;
1554 aux_offset = DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_1;
1555 } else {
1556 aux_offset = mtk_dp->train_info.channel_eq_pattern;
1557
1558 switch (mtk_dp->train_info.channel_eq_pattern) {
1559 case DP_TRAINING_PATTERN_4:
1560 pattern = 4;
1561 break;
1562 case DP_TRAINING_PATTERN_3:
1563 pattern = 3;
1564 aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
1565 break;
1566 case DP_TRAINING_PATTERN_2:
1567 default:
1568 pattern = 2;
1569 aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
1570 break;
1571 }
1572 }
1573
1574 mtk_dp_train_set_pattern(mtk_dp, pattern);
1575 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET, aux_offset);
1576}
1577
1578static int mtk_dp_train_setting(struct mtk_dp *mtk_dp, u8 target_link_rate,
1579 u8 target_lane_count)
1580{
1581 int ret;
1582
1583 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LINK_BW_SET, target_link_rate);
1584 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LANE_COUNT_SET,
1585 target_lane_count | DP_LANE_COUNT_ENHANCED_FRAME_EN);
1586
1587 if (mtk_dp->train_info.sink_ssc)
1588 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_DOWNSPREAD_CTRL,
1589 DP_SPREAD_AMP_0_5);
1590
1591 mtk_dp_set_lanes(mtk_dp, target_lane_count / 2);
1592 ret = mtk_dp_phy_configure(mtk_dp, target_link_rate, target_lane_count);
1593 if (ret)
1594 return ret;
1595
1596 dev_dbg(mtk_dp->dev,
1597 "Link train target_link_rate = 0x%x, target_lane_count = 0x%x\n",
1598 target_link_rate, target_lane_count);
1599
1600 return 0;
1601}
1602
1603static int mtk_dp_train_cr(struct mtk_dp *mtk_dp, u8 target_lane_count)
1604{
1605 u8 lane_adjust[2] = {};
1606 u8 link_status[DP_LINK_STATUS_SIZE] = {};
1607 u8 prev_lane_adjust = 0xff;
1608 int train_retries = 0;
1609 int voltage_retries = 0;
1610
1611 mtk_dp_pattern(mtk_dp, true);
1612
1613 /* In DP spec 1.4, the retry count of CR is defined as 10. */
1614 do {
1615 train_retries++;
1616 if (!mtk_dp->train_info.cable_plugged_in) {
1617 mtk_dp_train_set_pattern(mtk_dp, 0);
1618 return -ENODEV;
1619 }
1620
1621 drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
1622 lane_adjust, sizeof(lane_adjust));
1623 mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
1624 lane_adjust);
1625
1626 drm_dp_link_train_clock_recovery_delay(&mtk_dp->aux,
1627 mtk_dp->rx_cap);
1628
1629 /* check link status from sink device */
1630 drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
1631 if (drm_dp_clock_recovery_ok(link_status,
1632 target_lane_count)) {
1633 dev_dbg(mtk_dp->dev, "Link train CR pass\n");
1634 return 0;
1635 }
1636
1637 /*
1638 * In DP spec 1.4, if current voltage level is the same
1639 * with previous voltage level, we need to retry 5 times.
1640 */
1641 if (prev_lane_adjust == link_status[4]) {
1642 voltage_retries++;
1643 /*
1644 * Condition of CR fail:
1645 * 1. Failed to pass CR using the same voltage
1646 * level over five times.
1647 * 2. Failed to pass CR when the current voltage
1648 * level is the same with previous voltage
1649 * level and reach max voltage level (3).
1650 */
1651 if (voltage_retries > MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY ||
1652 (prev_lane_adjust & DP_ADJUST_VOLTAGE_SWING_LANE0_MASK) == 3) {
1653 dev_dbg(mtk_dp->dev, "Link train CR fail\n");
1654 break;
1655 }
1656 } else {
1657 /*
1658 * If the voltage level is changed, we need to
1659 * re-calculate this retry count.
1660 */
1661 voltage_retries = 0;
1662 }
1663 prev_lane_adjust = link_status[4];
1664 } while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
1665
1666 /* Failed to train CR, and disable pattern. */
1667 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
1668 DP_TRAINING_PATTERN_DISABLE);
1669 mtk_dp_train_set_pattern(mtk_dp, 0);
1670
1671 return -ETIMEDOUT;
1672}
1673
1674static int mtk_dp_train_eq(struct mtk_dp *mtk_dp, u8 target_lane_count)
1675{
1676 u8 lane_adjust[2] = {};
1677 u8 link_status[DP_LINK_STATUS_SIZE] = {};
1678 int train_retries = 0;
1679
1680 mtk_dp_pattern(mtk_dp, false);
1681
1682 do {
1683 train_retries++;
1684 if (!mtk_dp->train_info.cable_plugged_in) {
1685 mtk_dp_train_set_pattern(mtk_dp, 0);
1686 return -ENODEV;
1687 }
1688
1689 drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
1690 lane_adjust, sizeof(lane_adjust));
1691 mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
1692 lane_adjust);
1693
1694 drm_dp_link_train_channel_eq_delay(&mtk_dp->aux,
1695 mtk_dp->rx_cap);
1696
1697 /* check link status from sink device */
1698 drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
1699 if (drm_dp_channel_eq_ok(link_status, target_lane_count)) {
1700 dev_dbg(mtk_dp->dev, "Link train EQ pass\n");
1701
1702 /* Training done, and disable pattern. */
1703 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
1704 DP_TRAINING_PATTERN_DISABLE);
1705 mtk_dp_train_set_pattern(mtk_dp, 0);
1706 return 0;
1707 }
1708 dev_dbg(mtk_dp->dev, "Link train EQ fail\n");
1709 } while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
1710
1711 /* Failed to train EQ, and disable pattern. */
1712 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
1713 DP_TRAINING_PATTERN_DISABLE);
1714 mtk_dp_train_set_pattern(mtk_dp, 0);
1715
1716 return -ETIMEDOUT;
1717}
1718
1719static int mtk_dp_parse_capabilities(struct mtk_dp *mtk_dp)
1720{
1721 u8 val;
1722 ssize_t ret;
1723
1724 /*
1725 * If we're eDP and capabilities were already parsed we can skip
1726 * reading again because eDP panels aren't hotpluggable hence the
1727 * caps and training information won't ever change in a boot life
1728 */
1729 if (mtk_dp->bridge.type == DRM_MODE_CONNECTOR_eDP &&
1730 mtk_dp->rx_cap[DP_MAX_LINK_RATE] &&
1731 mtk_dp->train_info.sink_ssc)
1732 return 0;
1733
1734 ret = drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap);
1735 if (ret < 0)
1736 return ret;
1737
1738 if (drm_dp_tps4_supported(mtk_dp->rx_cap))
1739 mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_4;
1740 else if (drm_dp_tps3_supported(mtk_dp->rx_cap))
1741 mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_3;
1742 else
1743 mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_2;
1744
1745 mtk_dp->train_info.sink_ssc = drm_dp_max_downspread(mtk_dp->rx_cap);
1746
1747 ret = drm_dp_dpcd_readb(&mtk_dp->aux, DP_MSTM_CAP, &val);
1748 if (ret < 1) {
1749 drm_err(mtk_dp->drm_dev, "Read mstm cap failed\n");
1750 return ret == 0 ? -EIO : ret;
1751 }
1752
1753 if (val & DP_MST_CAP) {
1754 /* Clear DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 */
1755 ret = drm_dp_dpcd_readb(&mtk_dp->aux,
1756 DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
1757 &val);
1758 if (ret < 1) {
1759 drm_err(mtk_dp->drm_dev, "Read irq vector failed\n");
1760 return ret == 0 ? -EIO : ret;
1761 }
1762
1763 if (val) {
1764 ret = drm_dp_dpcd_writeb(&mtk_dp->aux,
1765 DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
1766 val);
1767 if (ret < 0)
1768 return ret;
1769 }
1770 }
1771
1772 return 0;
1773}
1774
1775static bool mtk_dp_edid_parse_audio_capabilities(struct mtk_dp *mtk_dp,
1776 struct mtk_dp_audio_cfg *cfg)
1777{
1778 if (!mtk_dp->data->audio_supported)
1779 return false;
1780
1781 if (mtk_dp->info.audio_cur_cfg.sad_count <= 0) {
1782 drm_info(mtk_dp->drm_dev, "The SADs is NULL\n");
1783 return false;
1784 }
1785
1786 return true;
1787}
1788
1789static void mtk_dp_train_change_mode(struct mtk_dp *mtk_dp)
1790{
1791 phy_reset(mtk_dp->phy);
1792 mtk_dp_reset_swing_pre_emphasis(mtk_dp);
1793}
1794
1795static int mtk_dp_training(struct mtk_dp *mtk_dp)
1796{
1797 int ret;
1798 u8 lane_count, link_rate, train_limit, max_link_rate;
1799
1800 link_rate = min_t(u8, mtk_dp->max_linkrate,
1801 mtk_dp->rx_cap[DP_MAX_LINK_RATE]);
1802 max_link_rate = link_rate;
1803 lane_count = min_t(u8, mtk_dp->max_lanes,
1804 drm_dp_max_lane_count(mtk_dp->rx_cap));
1805
1806 /*
1807 * TPS are generated by the hardware pattern generator. From the
1808 * hardware setting we need to disable this scramble setting before
1809 * use the TPS pattern generator.
1810 */
1811 mtk_dp_training_set_scramble(mtk_dp, false);
1812
1813 for (train_limit = 6; train_limit > 0; train_limit--) {
1814 mtk_dp_train_change_mode(mtk_dp);
1815
1816 ret = mtk_dp_train_setting(mtk_dp, link_rate, lane_count);
1817 if (ret)
1818 return ret;
1819
1820 ret = mtk_dp_train_cr(mtk_dp, lane_count);
1821 if (ret == -ENODEV) {
1822 return ret;
1823 } else if (ret) {
1824 /* reduce link rate */
1825 switch (link_rate) {
1826 case DP_LINK_BW_1_62:
1827 lane_count = lane_count / 2;
1828 link_rate = max_link_rate;
1829 if (lane_count == 0)
1830 return -EIO;
1831 break;
1832 case DP_LINK_BW_2_7:
1833 link_rate = DP_LINK_BW_1_62;
1834 break;
1835 case DP_LINK_BW_5_4:
1836 link_rate = DP_LINK_BW_2_7;
1837 break;
1838 case DP_LINK_BW_8_1:
1839 link_rate = DP_LINK_BW_5_4;
1840 break;
1841 default:
1842 return -EINVAL;
1843 }
1844 continue;
1845 }
1846
1847 ret = mtk_dp_train_eq(mtk_dp, lane_count);
1848 if (ret == -ENODEV) {
1849 return ret;
1850 } else if (ret) {
1851 /* reduce lane count */
1852 if (lane_count == 0)
1853 return -EIO;
1854 lane_count /= 2;
1855 continue;
1856 }
1857
1858 /* if we can run to this, training is done. */
1859 break;
1860 }
1861
1862 if (train_limit == 0)
1863 return -ETIMEDOUT;
1864
1865 mtk_dp->train_info.link_rate = link_rate;
1866 mtk_dp->train_info.lane_count = lane_count;
1867
1868 /*
1869 * After training done, we need to output normal stream instead of TPS,
1870 * so we need to enable scramble.
1871 */
1872 mtk_dp_training_set_scramble(mtk_dp, true);
1873 mtk_dp_set_enhanced_frame_mode(mtk_dp);
1874
1875 return 0;
1876}
1877
1878static void mtk_dp_video_enable(struct mtk_dp *mtk_dp, bool enable)
1879{
1880 /* the mute sequence is different between enable and disable */
1881 if (enable) {
1882 mtk_dp_msa_bypass_enable(mtk_dp, false);
1883 mtk_dp_pg_enable(mtk_dp, false);
1884 mtk_dp_set_tx_out(mtk_dp);
1885 mtk_dp_video_mute(mtk_dp, false);
1886 } else {
1887 mtk_dp_video_mute(mtk_dp, true);
1888 mtk_dp_pg_enable(mtk_dp, true);
1889 mtk_dp_msa_bypass_enable(mtk_dp, true);
1890 }
1891}
1892
1893static void mtk_dp_audio_sdp_setup(struct mtk_dp *mtk_dp,
1894 struct mtk_dp_audio_cfg *cfg)
1895{
1896 struct dp_sdp sdp;
1897 struct hdmi_audio_infoframe frame;
1898
1899 hdmi_audio_infoframe_init(&frame);
1900 frame.coding_type = HDMI_AUDIO_CODING_TYPE_PCM;
1901 frame.channels = cfg->channels;
1902 frame.sample_frequency = cfg->sample_rate;
1903
1904 switch (cfg->word_length_bits) {
1905 case 16:
1906 frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1907 break;
1908 case 20:
1909 frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_20;
1910 break;
1911 case 24:
1912 default:
1913 frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_24;
1914 break;
1915 }
1916
1917 hdmi_audio_infoframe_pack_for_dp(&frame, &sdp, MTK_DP_VERSION);
1918
1919 mtk_dp_audio_sdp_asp_set_channels(mtk_dp, cfg->channels);
1920 mtk_dp_setup_sdp_aui(mtk_dp, &sdp);
1921}
1922
1923static void mtk_dp_audio_setup(struct mtk_dp *mtk_dp,
1924 struct mtk_dp_audio_cfg *cfg)
1925{
1926 mtk_dp_audio_sdp_setup(mtk_dp, cfg);
1927 mtk_dp_audio_channel_status_set(mtk_dp, cfg);
1928
1929 mtk_dp_audio_setup_channels(mtk_dp, cfg);
1930 mtk_dp_audio_set_divider(mtk_dp);
1931}
1932
1933static int mtk_dp_video_config(struct mtk_dp *mtk_dp)
1934{
1935 mtk_dp_config_mn_mode(mtk_dp);
1936 mtk_dp_set_msa(mtk_dp);
1937 mtk_dp_set_color_depth(mtk_dp);
1938 return mtk_dp_set_color_format(mtk_dp, mtk_dp->info.format);
1939}
1940
1941static void mtk_dp_init_port(struct mtk_dp *mtk_dp)
1942{
1943 mtk_dp_set_idle_pattern(mtk_dp, true);
1944 mtk_dp_initialize_priv_data(mtk_dp);
1945
1946 mtk_dp_initialize_settings(mtk_dp);
1947 mtk_dp_initialize_aux_settings(mtk_dp);
1948 mtk_dp_initialize_digital_settings(mtk_dp);
1949 mtk_dp_initialize_hpd_detect_settings(mtk_dp);
1950
1951 mtk_dp_digital_sw_reset(mtk_dp);
1952}
1953
1954static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
1955{
1956 struct mtk_dp *mtk_dp = dev;
1957 unsigned long flags;
1958 u32 status;
1959
1960 if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
1961 msleep(100);
1962
1963 spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
1964 status = mtk_dp->irq_thread_handle;
1965 mtk_dp->irq_thread_handle = 0;
1966 spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
1967
1968 if (status & MTK_DP_THREAD_CABLE_STATE_CHG) {
1969 if (mtk_dp->bridge.dev)
1970 drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
1971
1972 if (!mtk_dp->train_info.cable_plugged_in) {
1973 mtk_dp_disable_sdp_aui(mtk_dp);
1974 memset(&mtk_dp->info.audio_cur_cfg, 0,
1975 sizeof(mtk_dp->info.audio_cur_cfg));
1976
1977 mtk_dp->need_debounce = false;
1978 mod_timer(&mtk_dp->debounce_timer,
1979 jiffies + msecs_to_jiffies(100) - 1);
1980 }
1981 }
1982
1983 if (status & MTK_DP_THREAD_HPD_EVENT)
1984 dev_dbg(mtk_dp->dev, "Receive IRQ from sink devices\n");
1985
1986 return IRQ_HANDLED;
1987}
1988
1989static irqreturn_t mtk_dp_hpd_event(int hpd, void *dev)
1990{
1991 struct mtk_dp *mtk_dp = dev;
1992 bool cable_sta_chg = false;
1993 unsigned long flags;
1994 u32 irq_status = mtk_dp_swirq_get_clear(mtk_dp) |
1995 mtk_dp_hwirq_get_clear(mtk_dp);
1996
1997 if (!irq_status)
1998 return IRQ_HANDLED;
1999
2000 spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
2001
2002 if (irq_status & MTK_DP_HPD_INTERRUPT)
2003 mtk_dp->irq_thread_handle |= MTK_DP_THREAD_HPD_EVENT;
2004
2005 /* Cable state is changed. */
2006 if (irq_status != MTK_DP_HPD_INTERRUPT) {
2007 mtk_dp->irq_thread_handle |= MTK_DP_THREAD_CABLE_STATE_CHG;
2008 cable_sta_chg = true;
2009 }
2010
2011 spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
2012
2013 if (cable_sta_chg) {
2014 if (!!(mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3414) &
2015 HPD_DB_DP_TRANS_P0_MASK))
2016 mtk_dp->train_info.cable_plugged_in = true;
2017 else
2018 mtk_dp->train_info.cable_plugged_in = false;
2019 }
2020
2021 return IRQ_WAKE_THREAD;
2022}
2023
2024static int mtk_dp_wait_hpd_asserted(struct drm_dp_aux *mtk_aux, unsigned long wait_us)
2025{
2026 struct mtk_dp *mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
2027 u32 val;
2028 int ret;
2029
2030 ret = regmap_read_poll_timeout(mtk_dp->regs, MTK_DP_TRANS_P0_3414,
2031 val, !!(val & HPD_DB_DP_TRANS_P0_MASK),
2032 wait_us / 100, wait_us);
2033 if (ret) {
2034 mtk_dp->train_info.cable_plugged_in = false;
2035 return ret;
2036 }
2037
2038 mtk_dp->train_info.cable_plugged_in = true;
2039
2040 ret = mtk_dp_parse_capabilities(mtk_dp);
2041 if (ret) {
2042 drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
2043 return ret;
2044 }
2045
2046 return 0;
2047}
2048
2049static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp,
2050 struct platform_device *pdev)
2051{
2052 struct device_node *endpoint;
2053 struct device *dev = &pdev->dev;
2054 int ret;
2055 void __iomem *base;
2056 u32 linkrate;
2057 int len;
2058
2059 base = devm_platform_ioremap_resource(pdev, 0);
2060 if (IS_ERR(base))
2061 return PTR_ERR(base);
2062
2063 mtk_dp->regs = devm_regmap_init_mmio(dev, base, &mtk_dp_regmap_config);
2064 if (IS_ERR(mtk_dp->regs))
2065 return PTR_ERR(mtk_dp->regs);
2066
2067 endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1, -1);
2068 len = of_property_count_elems_of_size(endpoint,
2069 "data-lanes", sizeof(u32));
2070 if (len < 0 || len > 4 || len == 3) {
2071 dev_err(dev, "invalid data lane size: %d\n", len);
2072 return -EINVAL;
2073 }
2074
2075 mtk_dp->max_lanes = len;
2076
2077 ret = device_property_read_u32(dev, "max-linkrate-mhz", &linkrate);
2078 if (ret) {
2079 dev_err(dev, "failed to read max linkrate: %d\n", ret);
2080 return ret;
2081 }
2082
2083 mtk_dp->max_linkrate = drm_dp_link_rate_to_bw_code(linkrate * 100);
2084
2085 return 0;
2086}
2087
2088static void mtk_dp_update_plugged_status(struct mtk_dp *mtk_dp)
2089{
2090 if (!mtk_dp->data->audio_supported || !mtk_dp->audio_enable)
2091 return;
2092
2093 mutex_lock(&mtk_dp->update_plugged_status_lock);
2094 if (mtk_dp->plugged_cb && mtk_dp->codec_dev)
2095 mtk_dp->plugged_cb(mtk_dp->codec_dev,
2096 mtk_dp->enabled &
2097 mtk_dp->info.audio_cur_cfg.detect_monitor);
2098 mutex_unlock(&mtk_dp->update_plugged_status_lock);
2099}
2100
2101static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge)
2102{
2103 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2104 enum drm_connector_status ret = connector_status_disconnected;
2105 bool enabled = mtk_dp->enabled;
2106
2107 if (!mtk_dp->train_info.cable_plugged_in)
2108 return ret;
2109
2110 if (!enabled)
2111 mtk_dp_aux_panel_poweron(mtk_dp, true);
2112
2113 /*
2114 * Some dongles still source HPD when they do not connect to any
2115 * sink device. To avoid this, we need to read the sink count
2116 * to make sure we do connect to sink devices. After this detect
2117 * function, we just need to check the HPD connection to check
2118 * whether we connect to a sink device.
2119 */
2120
2121 if (drm_dp_read_sink_count(&mtk_dp->aux) > 0)
2122 ret = connector_status_connected;
2123
2124 if (!enabled)
2125 mtk_dp_aux_panel_poweron(mtk_dp, false);
2126
2127 return ret;
2128}
2129
2130static const struct drm_edid *mtk_dp_edid_read(struct drm_bridge *bridge,
2131 struct drm_connector *connector)
2132{
2133 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2134 bool enabled = mtk_dp->enabled;
2135 const struct drm_edid *drm_edid;
2136 struct mtk_dp_audio_cfg *audio_caps = &mtk_dp->info.audio_cur_cfg;
2137
2138 if (!enabled) {
2139 drm_atomic_bridge_chain_pre_enable(bridge, connector->state->state);
2140 mtk_dp_aux_panel_poweron(mtk_dp, true);
2141 }
2142
2143 drm_edid = drm_edid_read_ddc(connector, &mtk_dp->aux.ddc);
2144
2145 /*
2146 * Parse capability here to let atomic_get_input_bus_fmts and
2147 * mode_valid use the capability to calculate sink bitrates.
2148 */
2149 if (mtk_dp_parse_capabilities(mtk_dp)) {
2150 drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
2151 drm_edid_free(drm_edid);
2152 drm_edid = NULL;
2153 }
2154
2155 if (drm_edid) {
2156 /*
2157 * FIXME: get rid of drm_edid_raw()
2158 */
2159 const struct edid *edid = drm_edid_raw(drm_edid);
2160 struct cea_sad *sads;
2161 int ret;
2162
2163 ret = drm_edid_to_sad(edid, &sads);
2164 /* Ignore any errors */
2165 if (ret < 0)
2166 ret = 0;
2167 if (ret)
2168 kfree(sads);
2169 audio_caps->sad_count = ret;
2170
2171 /*
2172 * FIXME: This should use connector->display_info.has_audio from
2173 * a path that has read the EDID and called
2174 * drm_edid_connector_update().
2175 */
2176 audio_caps->detect_monitor = drm_detect_monitor_audio(edid);
2177 }
2178
2179 if (!enabled) {
2180 mtk_dp_aux_panel_poweron(mtk_dp, false);
2181 drm_atomic_bridge_chain_post_disable(bridge, connector->state->state);
2182 }
2183
2184 return drm_edid;
2185}
2186
2187static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
2188 struct drm_dp_aux_msg *msg)
2189{
2190 struct mtk_dp *mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
2191 bool is_read;
2192 u8 request;
2193 size_t accessed_bytes = 0;
2194 int ret;
2195
2196 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP &&
2197 !mtk_dp->train_info.cable_plugged_in) {
2198 ret = -EIO;
2199 goto err;
2200 }
2201
2202 switch (msg->request) {
2203 case DP_AUX_I2C_MOT:
2204 case DP_AUX_I2C_WRITE:
2205 case DP_AUX_NATIVE_WRITE:
2206 case DP_AUX_I2C_WRITE_STATUS_UPDATE:
2207 case DP_AUX_I2C_WRITE_STATUS_UPDATE | DP_AUX_I2C_MOT:
2208 request = msg->request & ~DP_AUX_I2C_WRITE_STATUS_UPDATE;
2209 is_read = false;
2210 break;
2211 case DP_AUX_I2C_READ:
2212 case DP_AUX_NATIVE_READ:
2213 case DP_AUX_I2C_READ | DP_AUX_I2C_MOT:
2214 request = msg->request;
2215 is_read = true;
2216 break;
2217 default:
2218 dev_err(mtk_dp->dev, "invalid aux cmd = %d\n",
2219 msg->request);
2220 ret = -EINVAL;
2221 goto err;
2222 }
2223
2224 do {
2225 size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES,
2226 msg->size - accessed_bytes);
2227
2228 ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request,
2229 msg->address + accessed_bytes,
2230 msg->buffer + accessed_bytes,
2231 to_access, &msg->reply);
2232
2233 if (ret) {
2234 dev_info(mtk_dp->dev,
2235 "Failed to do AUX transfer: %d\n", ret);
2236 goto err;
2237 }
2238 accessed_bytes += to_access;
2239 } while (accessed_bytes < msg->size);
2240
2241 return msg->size;
2242err:
2243 msg->reply = DP_AUX_NATIVE_REPLY_NACK | DP_AUX_I2C_REPLY_NACK;
2244 return ret;
2245}
2246
2247static int mtk_dp_poweron(struct mtk_dp *mtk_dp)
2248{
2249 int ret;
2250
2251 ret = phy_init(mtk_dp->phy);
2252 if (ret) {
2253 dev_err(mtk_dp->dev, "Failed to initialize phy: %d\n", ret);
2254 return ret;
2255 }
2256
2257 mtk_dp_init_port(mtk_dp);
2258 mtk_dp_power_enable(mtk_dp);
2259
2260 return 0;
2261}
2262
2263static void mtk_dp_poweroff(struct mtk_dp *mtk_dp)
2264{
2265 mtk_dp_power_disable(mtk_dp);
2266 phy_exit(mtk_dp->phy);
2267}
2268
2269static int mtk_dp_bridge_attach(struct drm_bridge *bridge,
2270 enum drm_bridge_attach_flags flags)
2271{
2272 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2273 int ret;
2274
2275 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
2276 dev_err(mtk_dp->dev, "Driver does not provide a connector!");
2277 return -EINVAL;
2278 }
2279
2280 mtk_dp->aux.drm_dev = bridge->dev;
2281 ret = drm_dp_aux_register(&mtk_dp->aux);
2282 if (ret) {
2283 dev_err(mtk_dp->dev,
2284 "failed to register DP AUX channel: %d\n", ret);
2285 return ret;
2286 }
2287
2288 ret = mtk_dp_poweron(mtk_dp);
2289 if (ret)
2290 goto err_aux_register;
2291
2292 if (mtk_dp->next_bridge) {
2293 ret = drm_bridge_attach(bridge->encoder, mtk_dp->next_bridge,
2294 &mtk_dp->bridge, flags);
2295 if (ret) {
2296 drm_warn(mtk_dp->drm_dev,
2297 "Failed to attach external bridge: %d\n", ret);
2298 goto err_bridge_attach;
2299 }
2300 }
2301
2302 mtk_dp->drm_dev = bridge->dev;
2303
2304 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP) {
2305 irq_clear_status_flags(mtk_dp->irq, IRQ_NOAUTOEN);
2306 enable_irq(mtk_dp->irq);
2307 mtk_dp_hwirq_enable(mtk_dp, true);
2308 }
2309
2310 return 0;
2311
2312err_bridge_attach:
2313 mtk_dp_poweroff(mtk_dp);
2314err_aux_register:
2315 drm_dp_aux_unregister(&mtk_dp->aux);
2316 return ret;
2317}
2318
2319static void mtk_dp_bridge_detach(struct drm_bridge *bridge)
2320{
2321 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2322
2323 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP) {
2324 mtk_dp_hwirq_enable(mtk_dp, false);
2325 disable_irq(mtk_dp->irq);
2326 }
2327 mtk_dp->drm_dev = NULL;
2328 mtk_dp_poweroff(mtk_dp);
2329 drm_dp_aux_unregister(&mtk_dp->aux);
2330}
2331
2332static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge,
2333 struct drm_bridge_state *old_state)
2334{
2335 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2336 int ret;
2337
2338 mtk_dp->conn = drm_atomic_get_new_connector_for_encoder(old_state->base.state,
2339 bridge->encoder);
2340 if (!mtk_dp->conn) {
2341 drm_err(mtk_dp->drm_dev,
2342 "Can't enable bridge as connector is missing\n");
2343 return;
2344 }
2345
2346 mtk_dp_aux_panel_poweron(mtk_dp, true);
2347
2348 /* Training */
2349 ret = mtk_dp_training(mtk_dp);
2350 if (ret) {
2351 drm_err(mtk_dp->drm_dev, "Training failed, %d\n", ret);
2352 goto power_off_aux;
2353 }
2354
2355 ret = mtk_dp_video_config(mtk_dp);
2356 if (ret)
2357 goto power_off_aux;
2358
2359 mtk_dp_video_enable(mtk_dp, true);
2360
2361 mtk_dp->audio_enable =
2362 mtk_dp_edid_parse_audio_capabilities(mtk_dp,
2363 &mtk_dp->info.audio_cur_cfg);
2364 if (mtk_dp->audio_enable) {
2365 mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
2366 mtk_dp_audio_mute(mtk_dp, false);
2367 } else {
2368 memset(&mtk_dp->info.audio_cur_cfg, 0,
2369 sizeof(mtk_dp->info.audio_cur_cfg));
2370 }
2371
2372 mtk_dp->enabled = true;
2373 mtk_dp_update_plugged_status(mtk_dp);
2374
2375 return;
2376power_off_aux:
2377 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2378 DP_PWR_STATE_BANDGAP_TPLL,
2379 DP_PWR_STATE_MASK);
2380}
2381
2382static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge,
2383 struct drm_bridge_state *old_state)
2384{
2385 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2386
2387 mtk_dp->enabled = false;
2388 mtk_dp_update_plugged_status(mtk_dp);
2389 mtk_dp_video_enable(mtk_dp, false);
2390 mtk_dp_audio_mute(mtk_dp, true);
2391
2392 if (mtk_dp->train_info.cable_plugged_in) {
2393 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
2394 usleep_range(2000, 3000);
2395 }
2396
2397 /* power off aux */
2398 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2399 DP_PWR_STATE_BANDGAP_TPLL,
2400 DP_PWR_STATE_MASK);
2401
2402 /* Ensure the sink is muted */
2403 msleep(20);
2404}
2405
2406static enum drm_mode_status
2407mtk_dp_bridge_mode_valid(struct drm_bridge *bridge,
2408 const struct drm_display_info *info,
2409 const struct drm_display_mode *mode)
2410{
2411 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2412 u32 bpp = info->color_formats & DRM_COLOR_FORMAT_YCBCR422 ? 16 : 24;
2413 u32 lane_count_min = mtk_dp->train_info.lane_count;
2414 u32 rate = drm_dp_bw_code_to_link_rate(mtk_dp->train_info.link_rate) *
2415 lane_count_min;
2416
2417 /*
2418 *FEC overhead is approximately 2.4% from DP 1.4a spec 2.2.1.4.2.
2419 *The down-spread amplitude shall either be disabled (0.0%) or up
2420 *to 0.5% from 1.4a 3.5.2.6. Add up to approximately 3% total overhead.
2421 *
2422 *Because rate is already divided by 10,
2423 *mode->clock does not need to be multiplied by 10
2424 */
2425 if ((rate * 97 / 100) < (mode->clock * bpp / 8))
2426 return MODE_CLOCK_HIGH;
2427
2428 return MODE_OK;
2429}
2430
2431static u32 *mtk_dp_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
2432 struct drm_bridge_state *bridge_state,
2433 struct drm_crtc_state *crtc_state,
2434 struct drm_connector_state *conn_state,
2435 unsigned int *num_output_fmts)
2436{
2437 u32 *output_fmts;
2438
2439 *num_output_fmts = 0;
2440 output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
2441 if (!output_fmts)
2442 return NULL;
2443 *num_output_fmts = 1;
2444 output_fmts[0] = MEDIA_BUS_FMT_FIXED;
2445 return output_fmts;
2446}
2447
2448static const u32 mt8195_input_fmts[] = {
2449 MEDIA_BUS_FMT_RGB888_1X24,
2450 MEDIA_BUS_FMT_YUV8_1X24,
2451 MEDIA_BUS_FMT_YUYV8_1X16,
2452};
2453
2454static u32 *mtk_dp_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
2455 struct drm_bridge_state *bridge_state,
2456 struct drm_crtc_state *crtc_state,
2457 struct drm_connector_state *conn_state,
2458 u32 output_fmt,
2459 unsigned int *num_input_fmts)
2460{
2461 u32 *input_fmts;
2462 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2463 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
2464 struct drm_display_info *display_info =
2465 &conn_state->connector->display_info;
2466 u32 lane_count_min = mtk_dp->train_info.lane_count;
2467 u32 rate = drm_dp_bw_code_to_link_rate(mtk_dp->train_info.link_rate) *
2468 lane_count_min;
2469
2470 *num_input_fmts = 0;
2471
2472 /*
2473 * If the linkrate is smaller than datarate of RGB888, larger than
2474 * datarate of YUV422 and sink device supports YUV422, we output YUV422
2475 * format. Use this condition, we can support more resolution.
2476 */
2477 if (((rate * 97 / 100) < (mode->clock * 24 / 8)) &&
2478 ((rate * 97 / 100) > (mode->clock * 16 / 8)) &&
2479 (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR422)) {
2480 input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL);
2481 if (!input_fmts)
2482 return NULL;
2483 *num_input_fmts = 1;
2484 input_fmts[0] = MEDIA_BUS_FMT_YUYV8_1X16;
2485 } else {
2486 input_fmts = kcalloc(ARRAY_SIZE(mt8195_input_fmts),
2487 sizeof(*input_fmts),
2488 GFP_KERNEL);
2489 if (!input_fmts)
2490 return NULL;
2491
2492 *num_input_fmts = ARRAY_SIZE(mt8195_input_fmts);
2493 memcpy(input_fmts, mt8195_input_fmts, sizeof(mt8195_input_fmts));
2494 }
2495
2496 return input_fmts;
2497}
2498
2499static int mtk_dp_bridge_atomic_check(struct drm_bridge *bridge,
2500 struct drm_bridge_state *bridge_state,
2501 struct drm_crtc_state *crtc_state,
2502 struct drm_connector_state *conn_state)
2503{
2504 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2505 struct drm_crtc *crtc = conn_state->crtc;
2506 unsigned int input_bus_format;
2507
2508 input_bus_format = bridge_state->input_bus_cfg.format;
2509
2510 dev_dbg(mtk_dp->dev, "input format 0x%04x, output format 0x%04x\n",
2511 bridge_state->input_bus_cfg.format,
2512 bridge_state->output_bus_cfg.format);
2513
2514 if (input_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
2515 mtk_dp->info.format = DP_PIXELFORMAT_YUV422;
2516 else
2517 mtk_dp->info.format = DP_PIXELFORMAT_RGB;
2518
2519 if (!crtc) {
2520 drm_err(mtk_dp->drm_dev,
2521 "Can't enable bridge as connector state doesn't have a crtc\n");
2522 return -EINVAL;
2523 }
2524
2525 drm_display_mode_to_videomode(&crtc_state->adjusted_mode, &mtk_dp->info.vm);
2526
2527 return 0;
2528}
2529
2530static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
2531 .atomic_check = mtk_dp_bridge_atomic_check,
2532 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
2533 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
2534 .atomic_get_output_bus_fmts = mtk_dp_bridge_atomic_get_output_bus_fmts,
2535 .atomic_get_input_bus_fmts = mtk_dp_bridge_atomic_get_input_bus_fmts,
2536 .atomic_reset = drm_atomic_helper_bridge_reset,
2537 .attach = mtk_dp_bridge_attach,
2538 .detach = mtk_dp_bridge_detach,
2539 .atomic_enable = mtk_dp_bridge_atomic_enable,
2540 .atomic_disable = mtk_dp_bridge_atomic_disable,
2541 .mode_valid = mtk_dp_bridge_mode_valid,
2542 .edid_read = mtk_dp_edid_read,
2543 .detect = mtk_dp_bdg_detect,
2544};
2545
2546static void mtk_dp_debounce_timer(struct timer_list *t)
2547{
2548 struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
2549
2550 mtk_dp->need_debounce = true;
2551}
2552
2553/*
2554 * HDMI audio codec callbacks
2555 */
2556static int mtk_dp_audio_hw_params(struct device *dev, void *data,
2557 struct hdmi_codec_daifmt *daifmt,
2558 struct hdmi_codec_params *params)
2559{
2560 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2561
2562 if (!mtk_dp->enabled) {
2563 dev_err(mtk_dp->dev, "%s, DP is not ready!\n", __func__);
2564 return -ENODEV;
2565 }
2566
2567 mtk_dp->info.audio_cur_cfg.channels = params->cea.channels;
2568 mtk_dp->info.audio_cur_cfg.sample_rate = params->sample_rate;
2569
2570 mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
2571
2572 return 0;
2573}
2574
2575static int mtk_dp_audio_startup(struct device *dev, void *data)
2576{
2577 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2578
2579 mtk_dp_audio_mute(mtk_dp, false);
2580
2581 return 0;
2582}
2583
2584static void mtk_dp_audio_shutdown(struct device *dev, void *data)
2585{
2586 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2587
2588 mtk_dp_audio_mute(mtk_dp, true);
2589}
2590
2591static int mtk_dp_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
2592 size_t len)
2593{
2594 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2595
2596 if (mtk_dp->enabled)
2597 memcpy(buf, mtk_dp->conn->eld, len);
2598 else
2599 memset(buf, 0, len);
2600
2601 return 0;
2602}
2603
2604static int mtk_dp_audio_hook_plugged_cb(struct device *dev, void *data,
2605 hdmi_codec_plugged_cb fn,
2606 struct device *codec_dev)
2607{
2608 struct mtk_dp *mtk_dp = data;
2609
2610 mutex_lock(&mtk_dp->update_plugged_status_lock);
2611 mtk_dp->plugged_cb = fn;
2612 mtk_dp->codec_dev = codec_dev;
2613 mutex_unlock(&mtk_dp->update_plugged_status_lock);
2614
2615 mtk_dp_update_plugged_status(mtk_dp);
2616
2617 return 0;
2618}
2619
2620static const struct hdmi_codec_ops mtk_dp_audio_codec_ops = {
2621 .hw_params = mtk_dp_audio_hw_params,
2622 .audio_startup = mtk_dp_audio_startup,
2623 .audio_shutdown = mtk_dp_audio_shutdown,
2624 .get_eld = mtk_dp_audio_get_eld,
2625 .hook_plugged_cb = mtk_dp_audio_hook_plugged_cb,
2626 .no_capture_mute = 1,
2627};
2628
2629static int mtk_dp_register_audio_driver(struct device *dev)
2630{
2631 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2632 struct hdmi_codec_pdata codec_data = {
2633 .ops = &mtk_dp_audio_codec_ops,
2634 .max_i2s_channels = 8,
2635 .i2s = 1,
2636 .data = mtk_dp,
2637 };
2638
2639 mtk_dp->audio_pdev = platform_device_register_data(dev,
2640 HDMI_CODEC_DRV_NAME,
2641 PLATFORM_DEVID_AUTO,
2642 &codec_data,
2643 sizeof(codec_data));
2644 return PTR_ERR_OR_ZERO(mtk_dp->audio_pdev);
2645}
2646
2647static int mtk_dp_register_phy(struct mtk_dp *mtk_dp)
2648{
2649 struct device *dev = mtk_dp->dev;
2650
2651 mtk_dp->phy_dev = platform_device_register_data(dev, "mediatek-dp-phy",
2652 PLATFORM_DEVID_AUTO,
2653 &mtk_dp->regs,
2654 sizeof(struct regmap *));
2655 if (IS_ERR(mtk_dp->phy_dev))
2656 return dev_err_probe(dev, PTR_ERR(mtk_dp->phy_dev),
2657 "Failed to create device mediatek-dp-phy\n");
2658
2659 mtk_dp_get_calibration_data(mtk_dp);
2660
2661 mtk_dp->phy = devm_phy_get(&mtk_dp->phy_dev->dev, "dp");
2662 if (IS_ERR(mtk_dp->phy)) {
2663 platform_device_unregister(mtk_dp->phy_dev);
2664 return dev_err_probe(dev, PTR_ERR(mtk_dp->phy), "Failed to get phy\n");
2665 }
2666
2667 return 0;
2668}
2669
2670static int mtk_dp_edp_link_panel(struct drm_dp_aux *mtk_aux)
2671{
2672 struct mtk_dp *mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
2673 struct device *dev = mtk_aux->dev;
2674 int ret;
2675
2676 mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
2677
2678 /* Power off the DP and AUX: either detection is done, or no panel present */
2679 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2680 DP_PWR_STATE_BANDGAP_TPLL,
2681 DP_PWR_STATE_MASK);
2682 mtk_dp_power_disable(mtk_dp);
2683
2684 if (IS_ERR(mtk_dp->next_bridge)) {
2685 ret = PTR_ERR(mtk_dp->next_bridge);
2686 mtk_dp->next_bridge = NULL;
2687 return ret;
2688 }
2689
2690 /* For eDP, we add the bridge only if the panel was found */
2691 ret = devm_drm_bridge_add(dev, &mtk_dp->bridge);
2692 if (ret)
2693 return ret;
2694
2695 return 0;
2696}
2697
2698static int mtk_dp_probe(struct platform_device *pdev)
2699{
2700 struct mtk_dp *mtk_dp;
2701 struct device *dev = &pdev->dev;
2702 int ret;
2703
2704 mtk_dp = devm_kzalloc(dev, sizeof(*mtk_dp), GFP_KERNEL);
2705 if (!mtk_dp)
2706 return -ENOMEM;
2707
2708 mtk_dp->dev = dev;
2709 mtk_dp->data = (struct mtk_dp_data *)of_device_get_match_data(dev);
2710
2711 ret = mtk_dp_dt_parse(mtk_dp, pdev);
2712 if (ret)
2713 return dev_err_probe(dev, ret, "Failed to parse dt\n");
2714
2715 /*
2716 * Request the interrupt and install service routine only if we are
2717 * on full DisplayPort.
2718 * For eDP, polling the HPD instead is more convenient because we
2719 * don't expect any (un)plug events during runtime, hence we can
2720 * avoid some locking.
2721 */
2722 if (mtk_dp->data->bridge_type != DRM_MODE_CONNECTOR_eDP) {
2723 mtk_dp->irq = platform_get_irq(pdev, 0);
2724 if (mtk_dp->irq < 0)
2725 return dev_err_probe(dev, mtk_dp->irq,
2726 "failed to request dp irq resource\n");
2727
2728 spin_lock_init(&mtk_dp->irq_thread_lock);
2729
2730 irq_set_status_flags(mtk_dp->irq, IRQ_NOAUTOEN);
2731 ret = devm_request_threaded_irq(dev, mtk_dp->irq, mtk_dp_hpd_event,
2732 mtk_dp_hpd_event_thread,
2733 IRQ_TYPE_LEVEL_HIGH, dev_name(dev),
2734 mtk_dp);
2735 if (ret)
2736 return dev_err_probe(dev, ret,
2737 "failed to request mediatek dptx irq\n");
2738
2739 mtk_dp->need_debounce = true;
2740 timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
2741 }
2742
2743 mtk_dp->aux.name = "aux_mtk_dp";
2744 mtk_dp->aux.dev = dev;
2745 mtk_dp->aux.transfer = mtk_dp_aux_transfer;
2746 mtk_dp->aux.wait_hpd_asserted = mtk_dp_wait_hpd_asserted;
2747 drm_dp_aux_init(&mtk_dp->aux);
2748
2749 platform_set_drvdata(pdev, mtk_dp);
2750
2751 if (mtk_dp->data->audio_supported) {
2752 mutex_init(&mtk_dp->update_plugged_status_lock);
2753
2754 ret = mtk_dp_register_audio_driver(dev);
2755 if (ret)
2756 return dev_err_probe(dev, ret,
2757 "Failed to register audio driver\n");
2758 }
2759
2760 ret = mtk_dp_register_phy(mtk_dp);
2761 if (ret)
2762 return ret;
2763
2764 mtk_dp->bridge.funcs = &mtk_dp_bridge_funcs;
2765 mtk_dp->bridge.of_node = dev->of_node;
2766 mtk_dp->bridge.type = mtk_dp->data->bridge_type;
2767
2768 if (mtk_dp->bridge.type == DRM_MODE_CONNECTOR_eDP) {
2769 /*
2770 * Set the data lanes to idle in case the bootloader didn't
2771 * properly close the eDP port to avoid stalls and then
2772 * reinitialize, reset and power on the AUX block.
2773 */
2774 mtk_dp_set_idle_pattern(mtk_dp, true);
2775 mtk_dp_initialize_aux_settings(mtk_dp);
2776 mtk_dp_power_enable(mtk_dp);
2777
2778 /* Disable HW interrupts: we don't need any for eDP */
2779 mtk_dp_hwirq_enable(mtk_dp, false);
2780
2781 /*
2782 * Power on the AUX to allow reading the EDID from aux-bus:
2783 * please note that it is necessary to call power off in the
2784 * .done_probing() callback (mtk_dp_edp_link_panel), as only
2785 * there we can safely assume that we finished reading EDID.
2786 */
2787 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2788 DP_PWR_STATE_BANDGAP_TPLL_LANE,
2789 DP_PWR_STATE_MASK);
2790
2791 ret = devm_of_dp_aux_populate_bus(&mtk_dp->aux, mtk_dp_edp_link_panel);
2792 if (ret) {
2793 /* -ENODEV this means that the panel is not on the aux-bus */
2794 if (ret == -ENODEV) {
2795 ret = mtk_dp_edp_link_panel(&mtk_dp->aux);
2796 if (ret)
2797 return ret;
2798 } else {
2799 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2800 DP_PWR_STATE_BANDGAP_TPLL,
2801 DP_PWR_STATE_MASK);
2802 mtk_dp_power_disable(mtk_dp);
2803 return ret;
2804 }
2805 }
2806 } else {
2807 mtk_dp->bridge.ops = DRM_BRIDGE_OP_DETECT |
2808 DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
2809 ret = devm_drm_bridge_add(dev, &mtk_dp->bridge);
2810 if (ret)
2811 return dev_err_probe(dev, ret, "Failed to add bridge\n");
2812 }
2813
2814 pm_runtime_enable(dev);
2815 pm_runtime_get_sync(dev);
2816
2817 return 0;
2818}
2819
2820static void mtk_dp_remove(struct platform_device *pdev)
2821{
2822 struct mtk_dp *mtk_dp = platform_get_drvdata(pdev);
2823
2824 pm_runtime_put(&pdev->dev);
2825 pm_runtime_disable(&pdev->dev);
2826 if (mtk_dp->data->bridge_type != DRM_MODE_CONNECTOR_eDP)
2827 del_timer_sync(&mtk_dp->debounce_timer);
2828 platform_device_unregister(mtk_dp->phy_dev);
2829 if (mtk_dp->audio_pdev)
2830 platform_device_unregister(mtk_dp->audio_pdev);
2831}
2832
2833#ifdef CONFIG_PM_SLEEP
2834static int mtk_dp_suspend(struct device *dev)
2835{
2836 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2837
2838 mtk_dp_power_disable(mtk_dp);
2839 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP)
2840 mtk_dp_hwirq_enable(mtk_dp, false);
2841 pm_runtime_put_sync(dev);
2842
2843 return 0;
2844}
2845
2846static int mtk_dp_resume(struct device *dev)
2847{
2848 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2849
2850 pm_runtime_get_sync(dev);
2851 mtk_dp_init_port(mtk_dp);
2852 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP)
2853 mtk_dp_hwirq_enable(mtk_dp, true);
2854 mtk_dp_power_enable(mtk_dp);
2855
2856 return 0;
2857}
2858#endif
2859
2860static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend, mtk_dp_resume);
2861
2862static const struct mtk_dp_data mt8188_dp_data = {
2863 .bridge_type = DRM_MODE_CONNECTOR_DisplayPort,
2864 .smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
2865 .efuse_fmt = mt8188_dp_efuse_fmt,
2866 .audio_supported = true,
2867 .audio_pkt_in_hblank_area = true,
2868 .audio_m_div2_bit = MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
2869};
2870
2871static const struct mtk_dp_data mt8195_edp_data = {
2872 .bridge_type = DRM_MODE_CONNECTOR_eDP,
2873 .smc_cmd = MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE,
2874 .efuse_fmt = mt8195_edp_efuse_fmt,
2875 .audio_supported = false,
2876 .audio_m_div2_bit = MT8195_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
2877};
2878
2879static const struct mtk_dp_data mt8195_dp_data = {
2880 .bridge_type = DRM_MODE_CONNECTOR_DisplayPort,
2881 .smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
2882 .efuse_fmt = mt8195_dp_efuse_fmt,
2883 .audio_supported = true,
2884 .audio_m_div2_bit = MT8195_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
2885};
2886
2887static const struct of_device_id mtk_dp_of_match[] = {
2888 {
2889 .compatible = "mediatek,mt8188-edp-tx",
2890 .data = &mt8195_edp_data,
2891 },
2892 {
2893 .compatible = "mediatek,mt8188-dp-tx",
2894 .data = &mt8188_dp_data,
2895 },
2896 {
2897 .compatible = "mediatek,mt8195-edp-tx",
2898 .data = &mt8195_edp_data,
2899 },
2900 {
2901 .compatible = "mediatek,mt8195-dp-tx",
2902 .data = &mt8195_dp_data,
2903 },
2904 {},
2905};
2906MODULE_DEVICE_TABLE(of, mtk_dp_of_match);
2907
2908static struct platform_driver mtk_dp_driver = {
2909 .probe = mtk_dp_probe,
2910 .remove = mtk_dp_remove,
2911 .driver = {
2912 .name = "mediatek-drm-dp",
2913 .of_match_table = mtk_dp_of_match,
2914 .pm = &mtk_dp_pm_ops,
2915 },
2916};
2917
2918module_platform_driver(mtk_dp_driver);
2919
2920MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>");
2921MODULE_AUTHOR("Markus Schneider-Pargmann <msp@baylibre.com>");
2922MODULE_AUTHOR("Bo-Chen Chen <rex-bc.chen@mediatek.com>");
2923MODULE_DESCRIPTION("MediaTek DisplayPort Driver");
2924MODULE_LICENSE("GPL");
2925MODULE_SOFTDEP("pre: phy_mtk_dp");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2019-2022 MediaTek Inc.
4 * Copyright (c) 2022 BayLibre
5 */
6
7#include <drm/display/drm_dp_aux_bus.h>
8#include <drm/display/drm_dp.h>
9#include <drm/display/drm_dp_helper.h>
10#include <drm/drm_atomic_helper.h>
11#include <drm/drm_bridge.h>
12#include <drm/drm_crtc.h>
13#include <drm/drm_edid.h>
14#include <drm/drm_of.h>
15#include <drm/drm_panel.h>
16#include <drm/drm_print.h>
17#include <drm/drm_probe_helper.h>
18#include <linux/arm-smccc.h>
19#include <linux/clk.h>
20#include <linux/delay.h>
21#include <linux/errno.h>
22#include <linux/kernel.h>
23#include <linux/media-bus-format.h>
24#include <linux/nvmem-consumer.h>
25#include <linux/of.h>
26#include <linux/of_irq.h>
27#include <linux/of_platform.h>
28#include <linux/phy/phy.h>
29#include <linux/platform_device.h>
30#include <linux/pm_runtime.h>
31#include <linux/regmap.h>
32#include <linux/soc/mediatek/mtk_sip_svc.h>
33#include <sound/hdmi-codec.h>
34#include <video/videomode.h>
35
36#include "mtk_dp_reg.h"
37
38#define MTK_DP_SIP_CONTROL_AARCH32 MTK_SIP_SMC_CMD(0x523)
39#define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE (BIT(0) | BIT(5))
40#define MTK_DP_SIP_ATF_VIDEO_UNMUTE BIT(5)
41
42#define MTK_DP_THREAD_CABLE_STATE_CHG BIT(0)
43#define MTK_DP_THREAD_HPD_EVENT BIT(1)
44
45#define MTK_DP_4P1T 4
46#define MTK_DP_HDE 2
47#define MTK_DP_PIX_PER_ADDR 2
48#define MTK_DP_AUX_WAIT_REPLY_COUNT 20
49#define MTK_DP_TBC_BUF_READ_START_ADDR 0x8
50#define MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY 5
51#define MTK_DP_TRAIN_DOWNSCALE_RETRY 10
52#define MTK_DP_VERSION 0x11
53#define MTK_DP_SDP_AUI 0x4
54
55enum {
56 MTK_DP_CAL_GLB_BIAS_TRIM = 0,
57 MTK_DP_CAL_CLKTX_IMPSE,
58 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0,
59 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1,
60 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2,
61 MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3,
62 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0,
63 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1,
64 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2,
65 MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3,
66 MTK_DP_CAL_MAX,
67};
68
69struct mtk_dp_train_info {
70 bool sink_ssc;
71 bool cable_plugged_in;
72 /* link_rate is in multiple of 0.27Gbps */
73 int link_rate;
74 int lane_count;
75 unsigned int channel_eq_pattern;
76};
77
78struct mtk_dp_audio_cfg {
79 bool detect_monitor;
80 int sad_count;
81 int sample_rate;
82 int word_length_bits;
83 int channels;
84};
85
86struct mtk_dp_info {
87 enum dp_pixelformat format;
88 struct videomode vm;
89 struct mtk_dp_audio_cfg audio_cur_cfg;
90};
91
92struct mtk_dp_efuse_fmt {
93 unsigned short idx;
94 unsigned short shift;
95 unsigned short mask;
96 unsigned short min_val;
97 unsigned short max_val;
98 unsigned short default_val;
99};
100
101struct mtk_dp {
102 bool enabled;
103 bool need_debounce;
104 int irq;
105 u8 max_lanes;
106 u8 max_linkrate;
107 u8 rx_cap[DP_RECEIVER_CAP_SIZE];
108 u32 cal_data[MTK_DP_CAL_MAX];
109 u32 irq_thread_handle;
110 /* irq_thread_lock is used to protect irq_thread_handle */
111 spinlock_t irq_thread_lock;
112
113 struct device *dev;
114 struct drm_bridge bridge;
115 struct drm_bridge *next_bridge;
116 struct drm_connector *conn;
117 struct drm_device *drm_dev;
118 struct drm_dp_aux aux;
119
120 const struct mtk_dp_data *data;
121 struct mtk_dp_info info;
122 struct mtk_dp_train_info train_info;
123
124 struct platform_device *phy_dev;
125 struct phy *phy;
126 struct regmap *regs;
127 struct timer_list debounce_timer;
128
129 /* For audio */
130 bool audio_enable;
131 hdmi_codec_plugged_cb plugged_cb;
132 struct platform_device *audio_pdev;
133
134 struct device *codec_dev;
135 /* protect the plugged_cb as it's used in both bridge ops and audio */
136 struct mutex update_plugged_status_lock;
137};
138
139struct mtk_dp_data {
140 int bridge_type;
141 unsigned int smc_cmd;
142 const struct mtk_dp_efuse_fmt *efuse_fmt;
143 bool audio_supported;
144 bool audio_pkt_in_hblank_area;
145 u16 audio_m_div2_bit;
146};
147
148static const struct mtk_dp_efuse_fmt mt8195_edp_efuse_fmt[MTK_DP_CAL_MAX] = {
149 [MTK_DP_CAL_GLB_BIAS_TRIM] = {
150 .idx = 3,
151 .shift = 27,
152 .mask = 0x1f,
153 .min_val = 1,
154 .max_val = 0x1e,
155 .default_val = 0xf,
156 },
157 [MTK_DP_CAL_CLKTX_IMPSE] = {
158 .idx = 0,
159 .shift = 9,
160 .mask = 0xf,
161 .min_val = 1,
162 .max_val = 0xe,
163 .default_val = 0x8,
164 },
165 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
166 .idx = 2,
167 .shift = 28,
168 .mask = 0xf,
169 .min_val = 1,
170 .max_val = 0xe,
171 .default_val = 0x8,
172 },
173 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
174 .idx = 2,
175 .shift = 20,
176 .mask = 0xf,
177 .min_val = 1,
178 .max_val = 0xe,
179 .default_val = 0x8,
180 },
181 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
182 .idx = 2,
183 .shift = 12,
184 .mask = 0xf,
185 .min_val = 1,
186 .max_val = 0xe,
187 .default_val = 0x8,
188 },
189 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
190 .idx = 2,
191 .shift = 4,
192 .mask = 0xf,
193 .min_val = 1,
194 .max_val = 0xe,
195 .default_val = 0x8,
196 },
197 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
198 .idx = 2,
199 .shift = 24,
200 .mask = 0xf,
201 .min_val = 1,
202 .max_val = 0xe,
203 .default_val = 0x8,
204 },
205 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
206 .idx = 2,
207 .shift = 16,
208 .mask = 0xf,
209 .min_val = 1,
210 .max_val = 0xe,
211 .default_val = 0x8,
212 },
213 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
214 .idx = 2,
215 .shift = 8,
216 .mask = 0xf,
217 .min_val = 1,
218 .max_val = 0xe,
219 .default_val = 0x8,
220 },
221 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
222 .idx = 2,
223 .shift = 0,
224 .mask = 0xf,
225 .min_val = 1,
226 .max_val = 0xe,
227 .default_val = 0x8,
228 },
229};
230
231static const struct mtk_dp_efuse_fmt mt8195_dp_efuse_fmt[MTK_DP_CAL_MAX] = {
232 [MTK_DP_CAL_GLB_BIAS_TRIM] = {
233 .idx = 0,
234 .shift = 27,
235 .mask = 0x1f,
236 .min_val = 1,
237 .max_val = 0x1e,
238 .default_val = 0xf,
239 },
240 [MTK_DP_CAL_CLKTX_IMPSE] = {
241 .idx = 0,
242 .shift = 13,
243 .mask = 0xf,
244 .min_val = 1,
245 .max_val = 0xe,
246 .default_val = 0x8,
247 },
248 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
249 .idx = 1,
250 .shift = 28,
251 .mask = 0xf,
252 .min_val = 1,
253 .max_val = 0xe,
254 .default_val = 0x8,
255 },
256 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
257 .idx = 1,
258 .shift = 20,
259 .mask = 0xf,
260 .min_val = 1,
261 .max_val = 0xe,
262 .default_val = 0x8,
263 },
264 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
265 .idx = 1,
266 .shift = 12,
267 .mask = 0xf,
268 .min_val = 1,
269 .max_val = 0xe,
270 .default_val = 0x8,
271 },
272 [MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
273 .idx = 1,
274 .shift = 4,
275 .mask = 0xf,
276 .min_val = 1,
277 .max_val = 0xe,
278 .default_val = 0x8,
279 },
280 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
281 .idx = 1,
282 .shift = 24,
283 .mask = 0xf,
284 .min_val = 1,
285 .max_val = 0xe,
286 .default_val = 0x8,
287 },
288 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
289 .idx = 1,
290 .shift = 16,
291 .mask = 0xf,
292 .min_val = 1,
293 .max_val = 0xe,
294 .default_val = 0x8,
295 },
296 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
297 .idx = 1,
298 .shift = 8,
299 .mask = 0xf,
300 .min_val = 1,
301 .max_val = 0xe,
302 .default_val = 0x8,
303 },
304 [MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
305 .idx = 1,
306 .shift = 0,
307 .mask = 0xf,
308 .min_val = 1,
309 .max_val = 0xe,
310 .default_val = 0x8,
311 },
312};
313
314static struct regmap_config mtk_dp_regmap_config = {
315 .reg_bits = 32,
316 .val_bits = 32,
317 .reg_stride = 4,
318 .max_register = SEC_OFFSET + 0x90,
319 .name = "mtk-dp-registers",
320};
321
322static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b)
323{
324 return container_of(b, struct mtk_dp, bridge);
325}
326
327static u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset)
328{
329 u32 read_val;
330 int ret;
331
332 ret = regmap_read(mtk_dp->regs, offset, &read_val);
333 if (ret) {
334 dev_err(mtk_dp->dev, "Failed to read register 0x%x: %d\n",
335 offset, ret);
336 return 0;
337 }
338
339 return read_val;
340}
341
342static int mtk_dp_write(struct mtk_dp *mtk_dp, u32 offset, u32 val)
343{
344 int ret = regmap_write(mtk_dp->regs, offset, val);
345
346 if (ret)
347 dev_err(mtk_dp->dev,
348 "Failed to write register 0x%x with value 0x%x\n",
349 offset, val);
350 return ret;
351}
352
353static int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset,
354 u32 val, u32 mask)
355{
356 int ret = regmap_update_bits(mtk_dp->regs, offset, mask, val);
357
358 if (ret)
359 dev_err(mtk_dp->dev,
360 "Failed to update register 0x%x with value 0x%x, mask 0x%x\n",
361 offset, val, mask);
362 return ret;
363}
364
365static void mtk_dp_bulk_16bit_write(struct mtk_dp *mtk_dp, u32 offset, u8 *buf,
366 size_t length)
367{
368 int i;
369
370 /* 2 bytes per register */
371 for (i = 0; i < length; i += 2) {
372 u32 val = buf[i] | (i + 1 < length ? buf[i + 1] << 8 : 0);
373
374 if (mtk_dp_write(mtk_dp, offset + i * 2, val))
375 return;
376 }
377}
378
379static void mtk_dp_msa_bypass_enable(struct mtk_dp *mtk_dp, bool enable)
380{
381 u32 mask = HTOTAL_SEL_DP_ENC0_P0 | VTOTAL_SEL_DP_ENC0_P0 |
382 HSTART_SEL_DP_ENC0_P0 | VSTART_SEL_DP_ENC0_P0 |
383 HWIDTH_SEL_DP_ENC0_P0 | VHEIGHT_SEL_DP_ENC0_P0 |
384 HSP_SEL_DP_ENC0_P0 | HSW_SEL_DP_ENC0_P0 |
385 VSP_SEL_DP_ENC0_P0 | VSW_SEL_DP_ENC0_P0;
386
387 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030, enable ? 0 : mask, mask);
388}
389
390static void mtk_dp_set_msa(struct mtk_dp *mtk_dp)
391{
392 struct drm_display_mode mode;
393 struct videomode *vm = &mtk_dp->info.vm;
394
395 drm_display_mode_from_videomode(vm, &mode);
396
397 /* horizontal */
398 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3010,
399 mode.htotal, HTOTAL_SW_DP_ENC0_P0_MASK);
400 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3018,
401 vm->hsync_len + vm->hback_porch,
402 HSTART_SW_DP_ENC0_P0_MASK);
403 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
404 vm->hsync_len, HSW_SW_DP_ENC0_P0_MASK);
405 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
406 0, HSP_SW_DP_ENC0_P0_MASK);
407 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3020,
408 vm->hactive, HWIDTH_SW_DP_ENC0_P0_MASK);
409
410 /* vertical */
411 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3014,
412 mode.vtotal, VTOTAL_SW_DP_ENC0_P0_MASK);
413 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_301C,
414 vm->vsync_len + vm->vback_porch,
415 VSTART_SW_DP_ENC0_P0_MASK);
416 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
417 vm->vsync_len, VSW_SW_DP_ENC0_P0_MASK);
418 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
419 0, VSP_SW_DP_ENC0_P0_MASK);
420 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3024,
421 vm->vactive, VHEIGHT_SW_DP_ENC0_P0_MASK);
422
423 /* horizontal */
424 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3064,
425 vm->hactive, HDE_NUM_LAST_DP_ENC0_P0_MASK);
426 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3154,
427 mode.htotal, PGEN_HTOTAL_DP_ENC0_P0_MASK);
428 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3158,
429 vm->hfront_porch,
430 PGEN_HSYNC_RISING_DP_ENC0_P0_MASK);
431 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_315C,
432 vm->hsync_len,
433 PGEN_HSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
434 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3160,
435 vm->hback_porch + vm->hsync_len,
436 PGEN_HFDE_START_DP_ENC0_P0_MASK);
437 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3164,
438 vm->hactive,
439 PGEN_HFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
440
441 /* vertical */
442 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3168,
443 mode.vtotal,
444 PGEN_VTOTAL_DP_ENC0_P0_MASK);
445 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_316C,
446 vm->vfront_porch,
447 PGEN_VSYNC_RISING_DP_ENC0_P0_MASK);
448 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3170,
449 vm->vsync_len,
450 PGEN_VSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
451 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3174,
452 vm->vback_porch + vm->vsync_len,
453 PGEN_VFDE_START_DP_ENC0_P0_MASK);
454 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3178,
455 vm->vactive,
456 PGEN_VFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
457}
458
459static int mtk_dp_set_color_format(struct mtk_dp *mtk_dp,
460 enum dp_pixelformat color_format)
461{
462 u32 val;
463
464 /* update MISC0 */
465 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
466 color_format << DP_TEST_COLOR_FORMAT_SHIFT,
467 DP_TEST_COLOR_FORMAT_MASK);
468
469 switch (color_format) {
470 case DP_PIXELFORMAT_YUV422:
471 val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR422;
472 break;
473 case DP_PIXELFORMAT_RGB:
474 val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_RGB;
475 break;
476 default:
477 drm_warn(mtk_dp->drm_dev, "Unsupported color format: %d\n",
478 color_format);
479 return -EINVAL;
480 }
481
482 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
483 val, PIXEL_ENCODE_FORMAT_DP_ENC0_P0_MASK);
484 return 0;
485}
486
487static void mtk_dp_set_color_depth(struct mtk_dp *mtk_dp)
488{
489 /* Only support 8 bits currently */
490 /* Update MISC0 */
491 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
492 DP_MSA_MISC_8_BPC, DP_TEST_BIT_DEPTH_MASK);
493
494 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
495 VIDEO_COLOR_DEPTH_DP_ENC0_P0_8BIT,
496 VIDEO_COLOR_DEPTH_DP_ENC0_P0_MASK);
497}
498
499static void mtk_dp_config_mn_mode(struct mtk_dp *mtk_dp)
500{
501 /* 0: hw mode, 1: sw mode */
502 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
503 0, VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK);
504}
505
506static void mtk_dp_set_sram_read_start(struct mtk_dp *mtk_dp, u32 val)
507{
508 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
509 val, SRAM_START_READ_THRD_DP_ENC0_P0_MASK);
510}
511
512static void mtk_dp_setup_encoder(struct mtk_dp *mtk_dp)
513{
514 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
515 VIDEO_MN_GEN_EN_DP_ENC0_P0,
516 VIDEO_MN_GEN_EN_DP_ENC0_P0);
517 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
518 SDP_DOWN_CNT_DP_ENC0_P0_VAL,
519 SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
520 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
521 SDP_DOWN_CNT_IN_HBLANK_DP_ENC1_P0_VAL,
522 SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
523 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3300,
524 VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL << 8,
525 VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK);
526 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
527 FIFO_READ_START_POINT_DP_ENC1_P0_VAL << 12,
528 FIFO_READ_START_POINT_DP_ENC1_P0_MASK);
529 mtk_dp_write(mtk_dp, MTK_DP_ENC1_P0_3368, DP_ENC1_P0_3368_VAL);
530}
531
532static void mtk_dp_pg_enable(struct mtk_dp *mtk_dp, bool enable)
533{
534 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3038,
535 enable ? VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK : 0,
536 VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK);
537 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31B0,
538 PGEN_PATTERN_SEL_VAL << 4, PGEN_PATTERN_SEL_MASK);
539}
540
541static void mtk_dp_audio_setup_channels(struct mtk_dp *mtk_dp,
542 struct mtk_dp_audio_cfg *cfg)
543{
544 u32 channel_enable_bits;
545
546 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3324,
547 AUDIO_SOURCE_MUX_DP_ENC1_P0_DPRX,
548 AUDIO_SOURCE_MUX_DP_ENC1_P0_MASK);
549
550 /* audio channel count change reset */
551 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4,
552 DP_ENC_DUMMY_RW_1, DP_ENC_DUMMY_RW_1);
553 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3304,
554 AU_PRTY_REGEN_DP_ENC1_P0_MASK |
555 AU_CH_STS_REGEN_DP_ENC1_P0_MASK |
556 AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK,
557 AU_PRTY_REGEN_DP_ENC1_P0_MASK |
558 AU_CH_STS_REGEN_DP_ENC1_P0_MASK |
559 AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK);
560
561 switch (cfg->channels) {
562 case 2:
563 channel_enable_bits = AUDIO_2CH_SEL_DP_ENC0_P0_MASK |
564 AUDIO_2CH_EN_DP_ENC0_P0_MASK;
565 break;
566 case 8:
567 default:
568 channel_enable_bits = AUDIO_8CH_SEL_DP_ENC0_P0_MASK |
569 AUDIO_8CH_EN_DP_ENC0_P0_MASK;
570 break;
571 }
572 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088,
573 channel_enable_bits | AU_EN_DP_ENC0_P0,
574 AUDIO_2CH_SEL_DP_ENC0_P0_MASK |
575 AUDIO_2CH_EN_DP_ENC0_P0_MASK |
576 AUDIO_8CH_SEL_DP_ENC0_P0_MASK |
577 AUDIO_8CH_EN_DP_ENC0_P0_MASK |
578 AU_EN_DP_ENC0_P0);
579
580 /* audio channel count change reset */
581 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4, 0, DP_ENC_DUMMY_RW_1);
582
583 /* enable audio reset */
584 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4,
585 DP_ENC_DUMMY_RW_1_AUDIO_RST_EN,
586 DP_ENC_DUMMY_RW_1_AUDIO_RST_EN);
587}
588
589static void mtk_dp_audio_channel_status_set(struct mtk_dp *mtk_dp,
590 struct mtk_dp_audio_cfg *cfg)
591{
592 struct snd_aes_iec958 iec = { 0 };
593
594 switch (cfg->sample_rate) {
595 case 32000:
596 iec.status[3] = IEC958_AES3_CON_FS_32000;
597 break;
598 case 44100:
599 iec.status[3] = IEC958_AES3_CON_FS_44100;
600 break;
601 case 48000:
602 iec.status[3] = IEC958_AES3_CON_FS_48000;
603 break;
604 case 88200:
605 iec.status[3] = IEC958_AES3_CON_FS_88200;
606 break;
607 case 96000:
608 iec.status[3] = IEC958_AES3_CON_FS_96000;
609 break;
610 case 192000:
611 iec.status[3] = IEC958_AES3_CON_FS_192000;
612 break;
613 default:
614 iec.status[3] = IEC958_AES3_CON_FS_NOTID;
615 break;
616 }
617
618 switch (cfg->word_length_bits) {
619 case 16:
620 iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16;
621 break;
622 case 20:
623 iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16 |
624 IEC958_AES4_CON_MAX_WORDLEN_24;
625 break;
626 case 24:
627 iec.status[4] = IEC958_AES4_CON_WORDLEN_24_20 |
628 IEC958_AES4_CON_MAX_WORDLEN_24;
629 break;
630 default:
631 iec.status[4] = IEC958_AES4_CON_WORDLEN_NOTID;
632 }
633
634 /* IEC 60958 consumer channel status bits */
635 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_308C,
636 0, CH_STATUS_0_DP_ENC0_P0_MASK);
637 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3090,
638 iec.status[3] << 8, CH_STATUS_1_DP_ENC0_P0_MASK);
639 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3094,
640 iec.status[4], CH_STATUS_2_DP_ENC0_P0_MASK);
641}
642
643static void mtk_dp_audio_sdp_asp_set_channels(struct mtk_dp *mtk_dp,
644 int channels)
645{
646 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_312C,
647 (min(8, channels) - 1) << 8,
648 ASP_HB2_DP_ENC0_P0_MASK | ASP_HB3_DP_ENC0_P0_MASK);
649}
650
651static void mtk_dp_audio_set_divider(struct mtk_dp *mtk_dp)
652{
653 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC,
654 mtk_dp->data->audio_m_div2_bit,
655 AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MASK);
656}
657
658static void mtk_dp_sdp_trigger_aui(struct mtk_dp *mtk_dp)
659{
660 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280,
661 MTK_DP_SDP_AUI, SDP_PACKET_TYPE_DP_ENC1_P0_MASK);
662 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280,
663 SDP_PACKET_W_DP_ENC1_P0, SDP_PACKET_W_DP_ENC1_P0);
664}
665
666static void mtk_dp_sdp_set_data(struct mtk_dp *mtk_dp, u8 *data_bytes)
667{
668 mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_ENC1_P0_3200,
669 data_bytes, 0x10);
670}
671
672static void mtk_dp_sdp_set_header_aui(struct mtk_dp *mtk_dp,
673 struct dp_sdp_header *header)
674{
675 u32 db_addr = MTK_DP_ENC0_P0_30D8 + (MTK_DP_SDP_AUI - 1) * 8;
676
677 mtk_dp_bulk_16bit_write(mtk_dp, db_addr, (u8 *)header, 4);
678}
679
680static void mtk_dp_disable_sdp_aui(struct mtk_dp *mtk_dp)
681{
682 /* Disable periodic send */
683 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A8 & 0xfffc, 0,
684 0xff << ((MTK_DP_ENC0_P0_30A8 & 3) * 8));
685}
686
687static void mtk_dp_setup_sdp_aui(struct mtk_dp *mtk_dp,
688 struct dp_sdp *sdp)
689{
690 u32 shift;
691
692 mtk_dp_sdp_set_data(mtk_dp, sdp->db);
693 mtk_dp_sdp_set_header_aui(mtk_dp, &sdp->sdp_header);
694 mtk_dp_disable_sdp_aui(mtk_dp);
695
696 shift = (MTK_DP_ENC0_P0_30A8 & 3) * 8;
697
698 mtk_dp_sdp_trigger_aui(mtk_dp);
699 /* Enable periodic sending */
700 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A8 & 0xfffc,
701 0x05 << shift, 0xff << shift);
702}
703
704static void mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp)
705{
706 mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, DP_AUX_P0_3640_VAL);
707}
708
709static void mtk_dp_aux_set_cmd(struct mtk_dp *mtk_dp, u8 cmd, u32 addr)
710{
711 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3644,
712 cmd, MCU_REQUEST_COMMAND_AUX_TX_P0_MASK);
713 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3648,
714 addr, MCU_REQUEST_ADDRESS_LSB_AUX_TX_P0_MASK);
715 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_364C,
716 addr >> 16, MCU_REQUEST_ADDRESS_MSB_AUX_TX_P0_MASK);
717}
718
719static void mtk_dp_aux_clear_fifo(struct mtk_dp *mtk_dp)
720{
721 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
722 MCU_ACK_TRAN_COMPLETE_AUX_TX_P0,
723 MCU_ACK_TRAN_COMPLETE_AUX_TX_P0 |
724 PHY_FIFO_RST_AUX_TX_P0_MASK |
725 MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
726}
727
728static void mtk_dp_aux_request_ready(struct mtk_dp *mtk_dp)
729{
730 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3630,
731 AUX_TX_REQUEST_READY_AUX_TX_P0,
732 AUX_TX_REQUEST_READY_AUX_TX_P0);
733}
734
735static void mtk_dp_aux_fill_write_fifo(struct mtk_dp *mtk_dp, u8 *buf,
736 size_t length)
737{
738 mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_AUX_P0_3708, buf, length);
739}
740
741static void mtk_dp_aux_read_rx_fifo(struct mtk_dp *mtk_dp, u8 *buf,
742 size_t length, int read_delay)
743{
744 int read_pos;
745
746 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
747 0, AUX_RD_MODE_AUX_TX_P0_MASK);
748
749 for (read_pos = 0; read_pos < length; read_pos++) {
750 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
751 AUX_RX_FIFO_READ_PULSE_TX_P0,
752 AUX_RX_FIFO_READ_PULSE_TX_P0);
753
754 /* Hardware needs time to update the data */
755 usleep_range(read_delay, read_delay * 2);
756 buf[read_pos] = (u8)(mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3620) &
757 AUX_RX_FIFO_READ_DATA_AUX_TX_P0_MASK);
758 }
759}
760
761static void mtk_dp_aux_set_length(struct mtk_dp *mtk_dp, size_t length)
762{
763 if (length > 0) {
764 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
765 (length - 1) << 12,
766 MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
767 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
768 0,
769 AUX_NO_LENGTH_AUX_TX_P0 |
770 AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
771 AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
772 } else {
773 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
774 AUX_NO_LENGTH_AUX_TX_P0,
775 AUX_NO_LENGTH_AUX_TX_P0 |
776 AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
777 AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
778 }
779}
780
781static int mtk_dp_aux_wait_for_completion(struct mtk_dp *mtk_dp, bool is_read)
782{
783 int wait_reply = MTK_DP_AUX_WAIT_REPLY_COUNT;
784
785 while (--wait_reply) {
786 u32 aux_irq_status;
787
788 if (is_read) {
789 u32 fifo_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3618);
790
791 if (fifo_status &
792 (AUX_RX_FIFO_WRITE_POINTER_AUX_TX_P0_MASK |
793 AUX_RX_FIFO_FULL_AUX_TX_P0_MASK)) {
794 return 0;
795 }
796 }
797
798 aux_irq_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3640);
799 if (aux_irq_status & AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0)
800 return 0;
801
802 if (aux_irq_status & AUX_400US_TIMEOUT_IRQ_AUX_TX_P0)
803 return -ETIMEDOUT;
804
805 /* Give the hardware a chance to reach completion before retrying */
806 usleep_range(100, 500);
807 }
808
809 return -ETIMEDOUT;
810}
811
812static int mtk_dp_aux_do_transfer(struct mtk_dp *mtk_dp, bool is_read, u8 cmd,
813 u32 addr, u8 *buf, size_t length, u8 *reply_cmd)
814{
815 int ret;
816
817 if (is_read && (length > DP_AUX_MAX_PAYLOAD_BYTES ||
818 (cmd == DP_AUX_NATIVE_READ && !length)))
819 return -EINVAL;
820
821 if (!is_read)
822 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
823 AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0,
824 AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0);
825
826 /* We need to clear fifo and irq before sending commands to the sink device. */
827 mtk_dp_aux_clear_fifo(mtk_dp);
828 mtk_dp_aux_irq_clear(mtk_dp);
829
830 mtk_dp_aux_set_cmd(mtk_dp, cmd, addr);
831 mtk_dp_aux_set_length(mtk_dp, length);
832
833 if (!is_read) {
834 if (length)
835 mtk_dp_aux_fill_write_fifo(mtk_dp, buf, length);
836
837 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
838 AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK,
839 AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK);
840 }
841
842 mtk_dp_aux_request_ready(mtk_dp);
843
844 /* Wait for feedback from sink device. */
845 ret = mtk_dp_aux_wait_for_completion(mtk_dp, is_read);
846
847 *reply_cmd = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3624) &
848 AUX_RX_REPLY_COMMAND_AUX_TX_P0_MASK;
849
850 if (ret) {
851 u32 phy_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3628) &
852 AUX_RX_PHY_STATE_AUX_TX_P0_MASK;
853 if (phy_status != AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE) {
854 dev_err(mtk_dp->dev,
855 "AUX Rx Aux hang, need SW reset\n");
856 return -EIO;
857 }
858
859 return -ETIMEDOUT;
860 }
861
862 if (!length) {
863 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
864 0,
865 AUX_NO_LENGTH_AUX_TX_P0 |
866 AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
867 AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
868 } else if (is_read) {
869 int read_delay;
870
871 if (cmd == (DP_AUX_I2C_READ | DP_AUX_I2C_MOT) ||
872 cmd == DP_AUX_I2C_READ)
873 read_delay = 500;
874 else
875 read_delay = 100;
876
877 mtk_dp_aux_read_rx_fifo(mtk_dp, buf, length, read_delay);
878 }
879
880 return 0;
881}
882
883static void mtk_dp_set_swing_pre_emphasis(struct mtk_dp *mtk_dp, int lane_num,
884 int swing_val, int preemphasis)
885{
886 u32 lane_shift = lane_num * DP_TX1_VOLT_SWING_SHIFT;
887
888 dev_dbg(mtk_dp->dev,
889 "link training: swing_val = 0x%x, pre-emphasis = 0x%x\n",
890 swing_val, preemphasis);
891
892 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
893 swing_val << (DP_TX0_VOLT_SWING_SHIFT + lane_shift),
894 DP_TX0_VOLT_SWING_MASK << lane_shift);
895 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
896 preemphasis << (DP_TX0_PRE_EMPH_SHIFT + lane_shift),
897 DP_TX0_PRE_EMPH_MASK << lane_shift);
898}
899
900static void mtk_dp_reset_swing_pre_emphasis(struct mtk_dp *mtk_dp)
901{
902 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
903 0,
904 DP_TX0_VOLT_SWING_MASK |
905 DP_TX1_VOLT_SWING_MASK |
906 DP_TX2_VOLT_SWING_MASK |
907 DP_TX3_VOLT_SWING_MASK |
908 DP_TX0_PRE_EMPH_MASK |
909 DP_TX1_PRE_EMPH_MASK |
910 DP_TX2_PRE_EMPH_MASK |
911 DP_TX3_PRE_EMPH_MASK);
912}
913
914static u32 mtk_dp_swirq_get_clear(struct mtk_dp *mtk_dp)
915{
916 u32 irq_status = mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_35D0) &
917 SW_IRQ_FINAL_STATUS_DP_TRANS_P0_MASK;
918
919 if (irq_status) {
920 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
921 irq_status, SW_IRQ_CLR_DP_TRANS_P0_MASK);
922 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
923 0, SW_IRQ_CLR_DP_TRANS_P0_MASK);
924 }
925
926 return irq_status;
927}
928
929static u32 mtk_dp_hwirq_get_clear(struct mtk_dp *mtk_dp)
930{
931 u32 irq_status = (mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3418) &
932 IRQ_STATUS_DP_TRANS_P0_MASK) >> 12;
933
934 if (irq_status) {
935 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
936 irq_status, IRQ_CLR_DP_TRANS_P0_MASK);
937 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
938 0, IRQ_CLR_DP_TRANS_P0_MASK);
939 }
940
941 return irq_status;
942}
943
944static void mtk_dp_hwirq_enable(struct mtk_dp *mtk_dp, bool enable)
945{
946 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
947 enable ? 0 :
948 IRQ_MASK_DP_TRANS_P0_DISC_IRQ |
949 IRQ_MASK_DP_TRANS_P0_CONN_IRQ |
950 IRQ_MASK_DP_TRANS_P0_INT_IRQ,
951 IRQ_MASK_DP_TRANS_P0_MASK);
952}
953
954static void mtk_dp_initialize_settings(struct mtk_dp *mtk_dp)
955{
956 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_342C,
957 XTAL_FREQ_DP_TRANS_P0_DEFAULT,
958 XTAL_FREQ_DP_TRANS_P0_MASK);
959 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3540,
960 FEC_CLOCK_EN_MODE_DP_TRANS_P0,
961 FEC_CLOCK_EN_MODE_DP_TRANS_P0);
962 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31EC,
963 AUDIO_CH_SRC_SEL_DP_ENC0_P0,
964 AUDIO_CH_SRC_SEL_DP_ENC0_P0);
965 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
966 0, SDP_VSYNC_RISING_MASK_DP_ENC0_P0_MASK);
967 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_IRQ_MASK,
968 IRQ_MASK_AUX_TOP_IRQ, IRQ_MASK_AUX_TOP_IRQ);
969}
970
971static void mtk_dp_initialize_hpd_detect_settings(struct mtk_dp *mtk_dp)
972{
973 u32 val;
974 /* Debounce threshold */
975 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
976 8, HPD_DEB_THD_DP_TRANS_P0_MASK);
977
978 val = (HPD_INT_THD_DP_TRANS_P0_LOWER_500US |
979 HPD_INT_THD_DP_TRANS_P0_UPPER_1100US) << 4;
980 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
981 val, HPD_INT_THD_DP_TRANS_P0_MASK);
982
983 /*
984 * Connect threshold 1.5ms + 5 x 0.1ms = 2ms
985 * Disconnect threshold 1.5ms + 5 x 0.1ms = 2ms
986 */
987 val = (5 << 8) | (5 << 12);
988 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
989 val,
990 HPD_DISC_THD_DP_TRANS_P0_MASK |
991 HPD_CONN_THD_DP_TRANS_P0_MASK);
992 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3430,
993 HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT,
994 HPD_INT_THD_ECO_DP_TRANS_P0_MASK);
995}
996
997static void mtk_dp_initialize_aux_settings(struct mtk_dp *mtk_dp)
998{
999 /* modify timeout threshold = 0x1595 */
1000 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_360C,
1001 AUX_TIMEOUT_THR_AUX_TX_P0_VAL,
1002 AUX_TIMEOUT_THR_AUX_TX_P0_MASK);
1003 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3658,
1004 0, AUX_TX_OV_EN_AUX_TX_P0_MASK);
1005 /* 25 for 26M */
1006 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3634,
1007 AUX_TX_OVER_SAMPLE_RATE_FOR_26M << 8,
1008 AUX_TX_OVER_SAMPLE_RATE_AUX_TX_P0_MASK);
1009 /* 13 for 26M */
1010 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3614,
1011 AUX_RX_UI_CNT_THR_AUX_FOR_26M,
1012 AUX_RX_UI_CNT_THR_AUX_TX_P0_MASK);
1013 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_37C8,
1014 MTK_ATOP_EN_AUX_TX_P0,
1015 MTK_ATOP_EN_AUX_TX_P0);
1016
1017 /* Set complete reply mode for AUX */
1018 mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3690,
1019 RX_REPLY_COMPLETE_MODE_AUX_TX_P0,
1020 RX_REPLY_COMPLETE_MODE_AUX_TX_P0);
1021}
1022
1023static void mtk_dp_initialize_digital_settings(struct mtk_dp *mtk_dp)
1024{
1025 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
1026 0, VBID_VIDEO_MUTE_DP_ENC0_P0_MASK);
1027
1028 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3368,
1029 BS2BS_MODE_DP_ENC1_P0_VAL << 12,
1030 BS2BS_MODE_DP_ENC1_P0_MASK);
1031
1032 /* dp tx encoder reset all sw */
1033 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
1034 DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0,
1035 DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
1036
1037 /* Wait for sw reset to complete */
1038 usleep_range(1000, 5000);
1039 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
1040 0, DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
1041}
1042
1043static void mtk_dp_digital_sw_reset(struct mtk_dp *mtk_dp)
1044{
1045 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
1046 DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0,
1047 DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
1048
1049 /* Wait for sw reset to complete */
1050 usleep_range(1000, 5000);
1051 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
1052 0, DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
1053}
1054
1055static void mtk_dp_set_lanes(struct mtk_dp *mtk_dp, int lanes)
1056{
1057 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35F0,
1058 lanes == 0 ? 0 : DP_TRANS_DUMMY_RW_0,
1059 DP_TRANS_DUMMY_RW_0_MASK);
1060 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
1061 lanes, LANE_NUM_DP_ENC0_P0_MASK);
1062 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4,
1063 lanes << 2, LANE_NUM_DP_TRANS_P0_MASK);
1064}
1065
1066static void mtk_dp_get_calibration_data(struct mtk_dp *mtk_dp)
1067{
1068 const struct mtk_dp_efuse_fmt *fmt;
1069 struct device *dev = mtk_dp->dev;
1070 struct nvmem_cell *cell;
1071 u32 *cal_data = mtk_dp->cal_data;
1072 u32 *buf;
1073 int i;
1074 size_t len;
1075
1076 cell = nvmem_cell_get(dev, "dp_calibration_data");
1077 if (IS_ERR(cell)) {
1078 dev_warn(dev, "Failed to get nvmem cell dp_calibration_data\n");
1079 goto use_default_val;
1080 }
1081
1082 buf = (u32 *)nvmem_cell_read(cell, &len);
1083 nvmem_cell_put(cell);
1084
1085 if (IS_ERR(buf) || ((len / sizeof(u32)) != 4)) {
1086 dev_warn(dev, "Failed to read nvmem_cell_read\n");
1087
1088 if (!IS_ERR(buf))
1089 kfree(buf);
1090
1091 goto use_default_val;
1092 }
1093
1094 for (i = 0; i < MTK_DP_CAL_MAX; i++) {
1095 fmt = &mtk_dp->data->efuse_fmt[i];
1096 cal_data[i] = (buf[fmt->idx] >> fmt->shift) & fmt->mask;
1097
1098 if (cal_data[i] < fmt->min_val || cal_data[i] > fmt->max_val) {
1099 dev_warn(mtk_dp->dev, "Invalid efuse data, idx = %d\n", i);
1100 kfree(buf);
1101 goto use_default_val;
1102 }
1103 }
1104 kfree(buf);
1105
1106 return;
1107
1108use_default_val:
1109 dev_warn(mtk_dp->dev, "Use default calibration data\n");
1110 for (i = 0; i < MTK_DP_CAL_MAX; i++)
1111 cal_data[i] = mtk_dp->data->efuse_fmt[i].default_val;
1112}
1113
1114static void mtk_dp_set_calibration_data(struct mtk_dp *mtk_dp)
1115{
1116 u32 *cal_data = mtk_dp->cal_data;
1117
1118 mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_DPAUX_TX,
1119 cal_data[MTK_DP_CAL_CLKTX_IMPSE] << 20,
1120 RG_CKM_PT0_CKTX_IMPSEL);
1121 mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_BIAS_GEN_00,
1122 cal_data[MTK_DP_CAL_GLB_BIAS_TRIM] << 16,
1123 RG_XTP_GLB_BIAS_INTR_CTRL);
1124 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
1125 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] << 12,
1126 RG_XTP_LN0_TX_IMPSEL_PMOS);
1127 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
1128 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] << 16,
1129 RG_XTP_LN0_TX_IMPSEL_NMOS);
1130 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
1131 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] << 12,
1132 RG_XTP_LN1_TX_IMPSEL_PMOS);
1133 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
1134 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] << 16,
1135 RG_XTP_LN1_TX_IMPSEL_NMOS);
1136 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
1137 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] << 12,
1138 RG_XTP_LN2_TX_IMPSEL_PMOS);
1139 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
1140 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] << 16,
1141 RG_XTP_LN2_TX_IMPSEL_NMOS);
1142 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
1143 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] << 12,
1144 RG_XTP_LN3_TX_IMPSEL_PMOS);
1145 mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
1146 cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] << 16,
1147 RG_XTP_LN3_TX_IMPSEL_NMOS);
1148}
1149
1150static int mtk_dp_phy_configure(struct mtk_dp *mtk_dp,
1151 u32 link_rate, int lane_count)
1152{
1153 int ret;
1154 union phy_configure_opts phy_opts = {
1155 .dp = {
1156 .link_rate = drm_dp_bw_code_to_link_rate(link_rate) / 100,
1157 .set_rate = 1,
1158 .lanes = lane_count,
1159 .set_lanes = 1,
1160 .ssc = mtk_dp->train_info.sink_ssc,
1161 }
1162 };
1163
1164 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, DP_PWR_STATE_BANDGAP,
1165 DP_PWR_STATE_MASK);
1166
1167 ret = phy_configure(mtk_dp->phy, &phy_opts);
1168 if (ret)
1169 return ret;
1170
1171 mtk_dp_set_calibration_data(mtk_dp);
1172 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1173 DP_PWR_STATE_BANDGAP_TPLL_LANE, DP_PWR_STATE_MASK);
1174
1175 return 0;
1176}
1177
1178static void mtk_dp_set_idle_pattern(struct mtk_dp *mtk_dp, bool enable)
1179{
1180 u32 val = POST_MISC_DATA_LANE0_OV_DP_TRANS_P0_MASK |
1181 POST_MISC_DATA_LANE1_OV_DP_TRANS_P0_MASK |
1182 POST_MISC_DATA_LANE2_OV_DP_TRANS_P0_MASK |
1183 POST_MISC_DATA_LANE3_OV_DP_TRANS_P0_MASK;
1184
1185 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3580,
1186 enable ? val : 0, val);
1187}
1188
1189static void mtk_dp_train_set_pattern(struct mtk_dp *mtk_dp, int pattern)
1190{
1191 /* TPS1 */
1192 if (pattern == 1)
1193 mtk_dp_set_idle_pattern(mtk_dp, false);
1194
1195 mtk_dp_update_bits(mtk_dp,
1196 MTK_DP_TRANS_P0_3400,
1197 pattern ? BIT(pattern - 1) << 12 : 0,
1198 PATTERN1_EN_DP_TRANS_P0_MASK |
1199 PATTERN2_EN_DP_TRANS_P0_MASK |
1200 PATTERN3_EN_DP_TRANS_P0_MASK |
1201 PATTERN4_EN_DP_TRANS_P0_MASK);
1202}
1203
1204static void mtk_dp_set_enhanced_frame_mode(struct mtk_dp *mtk_dp)
1205{
1206 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
1207 ENHANCED_FRAME_EN_DP_ENC0_P0,
1208 ENHANCED_FRAME_EN_DP_ENC0_P0);
1209}
1210
1211static void mtk_dp_training_set_scramble(struct mtk_dp *mtk_dp, bool enable)
1212{
1213 mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3404,
1214 enable ? DP_SCR_EN_DP_TRANS_P0_MASK : 0,
1215 DP_SCR_EN_DP_TRANS_P0_MASK);
1216}
1217
1218static void mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable)
1219{
1220 struct arm_smccc_res res;
1221 u32 val = VIDEO_MUTE_SEL_DP_ENC0_P0 |
1222 (enable ? VIDEO_MUTE_SW_DP_ENC0_P0 : 0);
1223
1224 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
1225 val,
1226 VIDEO_MUTE_SEL_DP_ENC0_P0 |
1227 VIDEO_MUTE_SW_DP_ENC0_P0);
1228
1229 arm_smccc_smc(MTK_DP_SIP_CONTROL_AARCH32,
1230 mtk_dp->data->smc_cmd, enable,
1231 0, 0, 0, 0, 0, &res);
1232
1233 dev_dbg(mtk_dp->dev, "smc cmd: 0x%x, p1: %s, ret: 0x%lx-0x%lx\n",
1234 mtk_dp->data->smc_cmd, enable ? "enable" : "disable", res.a0, res.a1);
1235}
1236
1237static void mtk_dp_audio_mute(struct mtk_dp *mtk_dp, bool mute)
1238{
1239 u32 val[3];
1240
1241 if (mute) {
1242 val[0] = VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0 |
1243 VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0;
1244 val[1] = 0;
1245 val[2] = 0;
1246 } else {
1247 val[0] = 0;
1248 val[1] = AU_EN_DP_ENC0_P0;
1249 /* Send one every two frames */
1250 val[2] = 0x0F;
1251 }
1252
1253 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030,
1254 val[0],
1255 VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0 |
1256 VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0);
1257 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088,
1258 val[1], AU_EN_DP_ENC0_P0);
1259 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A4,
1260 val[2], AU_TS_CFG_DP_ENC0_P0_MASK);
1261}
1262
1263static void mtk_dp_aux_panel_poweron(struct mtk_dp *mtk_dp, bool pwron)
1264{
1265 if (pwron) {
1266 /* power on aux */
1267 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1268 DP_PWR_STATE_BANDGAP_TPLL_LANE,
1269 DP_PWR_STATE_MASK);
1270
1271 /* power on panel */
1272 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
1273 usleep_range(2000, 5000);
1274 } else {
1275 /* power off panel */
1276 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
1277 usleep_range(2000, 3000);
1278
1279 /* power off aux */
1280 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1281 DP_PWR_STATE_BANDGAP_TPLL,
1282 DP_PWR_STATE_MASK);
1283 }
1284}
1285
1286static void mtk_dp_power_enable(struct mtk_dp *mtk_dp)
1287{
1288 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
1289 0, SW_RST_B_PHYD);
1290
1291 /* Wait for power enable */
1292 usleep_range(10, 200);
1293
1294 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
1295 SW_RST_B_PHYD, SW_RST_B_PHYD);
1296 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
1297 DP_PWR_STATE_BANDGAP_TPLL, DP_PWR_STATE_MASK);
1298 mtk_dp_write(mtk_dp, MTK_DP_1040,
1299 RG_DPAUX_RX_VALID_DEGLITCH_EN | RG_XTP_GLB_CKDET_EN |
1300 RG_DPAUX_RX_EN);
1301 mtk_dp_update_bits(mtk_dp, MTK_DP_0034, 0, DA_CKM_CKTX0_EN_FORCE_EN);
1302}
1303
1304static void mtk_dp_power_disable(struct mtk_dp *mtk_dp)
1305{
1306 mtk_dp_write(mtk_dp, MTK_DP_TOP_PWR_STATE, 0);
1307
1308 mtk_dp_update_bits(mtk_dp, MTK_DP_0034,
1309 DA_CKM_CKTX0_EN_FORCE_EN, DA_CKM_CKTX0_EN_FORCE_EN);
1310
1311 /* Disable RX */
1312 mtk_dp_write(mtk_dp, MTK_DP_1040, 0);
1313 mtk_dp_write(mtk_dp, MTK_DP_TOP_MEM_PD,
1314 0x550 | FUSE_SEL | MEM_ISO_EN);
1315}
1316
1317static void mtk_dp_initialize_priv_data(struct mtk_dp *mtk_dp)
1318{
1319 bool plugged_in = (mtk_dp->bridge.type == DRM_MODE_CONNECTOR_eDP);
1320
1321 mtk_dp->train_info.link_rate = DP_LINK_BW_5_4;
1322 mtk_dp->train_info.lane_count = mtk_dp->max_lanes;
1323 mtk_dp->train_info.cable_plugged_in = plugged_in;
1324
1325 mtk_dp->info.format = DP_PIXELFORMAT_RGB;
1326 memset(&mtk_dp->info.vm, 0, sizeof(struct videomode));
1327 mtk_dp->audio_enable = false;
1328}
1329
1330static void mtk_dp_sdp_set_down_cnt_init(struct mtk_dp *mtk_dp,
1331 u32 sram_read_start)
1332{
1333 u32 sdp_down_cnt_init = 0;
1334 struct drm_display_mode mode;
1335 struct videomode *vm = &mtk_dp->info.vm;
1336
1337 drm_display_mode_from_videomode(vm, &mode);
1338
1339 if (mode.clock > 0)
1340 sdp_down_cnt_init = sram_read_start *
1341 mtk_dp->train_info.link_rate * 2700 * 8 /
1342 (mode.clock * 4);
1343
1344 switch (mtk_dp->train_info.lane_count) {
1345 case 1:
1346 sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 0x1A);
1347 break;
1348 case 2:
1349 /* case for LowResolution && High Audio Sample Rate */
1350 sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 0x10);
1351 sdp_down_cnt_init += mode.vtotal <= 525 ? 4 : 0;
1352 break;
1353 case 4:
1354 default:
1355 sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 6);
1356 break;
1357 }
1358
1359 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
1360 sdp_down_cnt_init,
1361 SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
1362}
1363
1364static void mtk_dp_sdp_set_down_cnt_init_in_hblank(struct mtk_dp *mtk_dp)
1365{
1366 int pix_clk_mhz;
1367 u32 dc_offset;
1368 u32 spd_down_cnt_init = 0;
1369 struct drm_display_mode mode;
1370 struct videomode *vm = &mtk_dp->info.vm;
1371
1372 drm_display_mode_from_videomode(vm, &mode);
1373
1374 pix_clk_mhz = mtk_dp->info.format == DP_PIXELFORMAT_YUV420 ?
1375 mode.clock / 2000 : mode.clock / 1000;
1376
1377 switch (mtk_dp->train_info.lane_count) {
1378 case 1:
1379 spd_down_cnt_init = 0x20;
1380 break;
1381 case 2:
1382 dc_offset = (mode.vtotal <= 525) ? 0x14 : 0x00;
1383 spd_down_cnt_init = 0x18 + dc_offset;
1384 break;
1385 case 4:
1386 default:
1387 dc_offset = (mode.vtotal <= 525) ? 0x08 : 0x00;
1388 if (pix_clk_mhz > mtk_dp->train_info.link_rate * 27)
1389 spd_down_cnt_init = 0x8;
1390 else
1391 spd_down_cnt_init = 0x10 + dc_offset;
1392 break;
1393 }
1394
1395 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364, spd_down_cnt_init,
1396 SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
1397}
1398
1399static void mtk_dp_audio_sample_arrange_disable(struct mtk_dp *mtk_dp)
1400{
1401 /* arrange audio packets into the Hblanking and Vblanking area */
1402 if (!mtk_dp->data->audio_pkt_in_hblank_area)
1403 return;
1404
1405 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3374, 0,
1406 SDP_ASP_INSERT_IN_HBLANK_DP_ENC1_P0_MASK);
1407 mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3374, 0,
1408 SDP_DOWN_ASP_CNT_INIT_DP_ENC1_P0_MASK);
1409}
1410
1411static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp)
1412{
1413 u32 sram_read_start = min_t(u32, MTK_DP_TBC_BUF_READ_START_ADDR,
1414 mtk_dp->info.vm.hactive /
1415 mtk_dp->train_info.lane_count /
1416 MTK_DP_4P1T / MTK_DP_HDE /
1417 MTK_DP_PIX_PER_ADDR);
1418 mtk_dp_set_sram_read_start(mtk_dp, sram_read_start);
1419 mtk_dp_setup_encoder(mtk_dp);
1420 mtk_dp_audio_sample_arrange_disable(mtk_dp);
1421 mtk_dp_sdp_set_down_cnt_init_in_hblank(mtk_dp);
1422 mtk_dp_sdp_set_down_cnt_init(mtk_dp, sram_read_start);
1423}
1424
1425static void mtk_dp_set_tx_out(struct mtk_dp *mtk_dp)
1426{
1427 mtk_dp_setup_tu(mtk_dp);
1428}
1429
1430static void mtk_dp_train_update_swing_pre(struct mtk_dp *mtk_dp, int lanes,
1431 u8 dpcd_adjust_req[2])
1432{
1433 int lane;
1434
1435 for (lane = 0; lane < lanes; ++lane) {
1436 u8 val;
1437 u8 swing;
1438 u8 preemphasis;
1439 int index = lane / 2;
1440 int shift = lane % 2 ? DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : 0;
1441
1442 swing = (dpcd_adjust_req[index] >> shift) &
1443 DP_ADJUST_VOLTAGE_SWING_LANE0_MASK;
1444 preemphasis = ((dpcd_adjust_req[index] >> shift) &
1445 DP_ADJUST_PRE_EMPHASIS_LANE0_MASK) >>
1446 DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT;
1447 val = swing << DP_TRAIN_VOLTAGE_SWING_SHIFT |
1448 preemphasis << DP_TRAIN_PRE_EMPHASIS_SHIFT;
1449
1450 if (swing == DP_TRAIN_VOLTAGE_SWING_LEVEL_3)
1451 val |= DP_TRAIN_MAX_SWING_REACHED;
1452 if (preemphasis == 3)
1453 val |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
1454
1455 mtk_dp_set_swing_pre_emphasis(mtk_dp, lane, swing, preemphasis);
1456 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_LANE0_SET + lane,
1457 val);
1458 }
1459}
1460
1461static void mtk_dp_pattern(struct mtk_dp *mtk_dp, bool is_tps1)
1462{
1463 int pattern;
1464 unsigned int aux_offset;
1465
1466 if (is_tps1) {
1467 pattern = 1;
1468 aux_offset = DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_1;
1469 } else {
1470 aux_offset = mtk_dp->train_info.channel_eq_pattern;
1471
1472 switch (mtk_dp->train_info.channel_eq_pattern) {
1473 case DP_TRAINING_PATTERN_4:
1474 pattern = 4;
1475 break;
1476 case DP_TRAINING_PATTERN_3:
1477 pattern = 3;
1478 aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
1479 break;
1480 case DP_TRAINING_PATTERN_2:
1481 default:
1482 pattern = 2;
1483 aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
1484 break;
1485 }
1486 }
1487
1488 mtk_dp_train_set_pattern(mtk_dp, pattern);
1489 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET, aux_offset);
1490}
1491
1492static int mtk_dp_train_setting(struct mtk_dp *mtk_dp, u8 target_link_rate,
1493 u8 target_lane_count)
1494{
1495 int ret;
1496
1497 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LINK_BW_SET, target_link_rate);
1498 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LANE_COUNT_SET,
1499 target_lane_count | DP_LANE_COUNT_ENHANCED_FRAME_EN);
1500
1501 if (mtk_dp->train_info.sink_ssc)
1502 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_DOWNSPREAD_CTRL,
1503 DP_SPREAD_AMP_0_5);
1504
1505 mtk_dp_set_lanes(mtk_dp, target_lane_count / 2);
1506 ret = mtk_dp_phy_configure(mtk_dp, target_link_rate, target_lane_count);
1507 if (ret)
1508 return ret;
1509
1510 dev_dbg(mtk_dp->dev,
1511 "Link train target_link_rate = 0x%x, target_lane_count = 0x%x\n",
1512 target_link_rate, target_lane_count);
1513
1514 return 0;
1515}
1516
1517static int mtk_dp_train_cr(struct mtk_dp *mtk_dp, u8 target_lane_count)
1518{
1519 u8 lane_adjust[2] = {};
1520 u8 link_status[DP_LINK_STATUS_SIZE] = {};
1521 u8 prev_lane_adjust = 0xff;
1522 int train_retries = 0;
1523 int voltage_retries = 0;
1524
1525 mtk_dp_pattern(mtk_dp, true);
1526
1527 /* In DP spec 1.4, the retry count of CR is defined as 10. */
1528 do {
1529 train_retries++;
1530 if (!mtk_dp->train_info.cable_plugged_in) {
1531 mtk_dp_train_set_pattern(mtk_dp, 0);
1532 return -ENODEV;
1533 }
1534
1535 drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
1536 lane_adjust, sizeof(lane_adjust));
1537 mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
1538 lane_adjust);
1539
1540 drm_dp_link_train_clock_recovery_delay(&mtk_dp->aux,
1541 mtk_dp->rx_cap);
1542
1543 /* check link status from sink device */
1544 drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
1545 if (drm_dp_clock_recovery_ok(link_status,
1546 target_lane_count)) {
1547 dev_dbg(mtk_dp->dev, "Link train CR pass\n");
1548 return 0;
1549 }
1550
1551 /*
1552 * In DP spec 1.4, if current voltage level is the same
1553 * with previous voltage level, we need to retry 5 times.
1554 */
1555 if (prev_lane_adjust == link_status[4]) {
1556 voltage_retries++;
1557 /*
1558 * Condition of CR fail:
1559 * 1. Failed to pass CR using the same voltage
1560 * level over five times.
1561 * 2. Failed to pass CR when the current voltage
1562 * level is the same with previous voltage
1563 * level and reach max voltage level (3).
1564 */
1565 if (voltage_retries > MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY ||
1566 (prev_lane_adjust & DP_ADJUST_VOLTAGE_SWING_LANE0_MASK) == 3) {
1567 dev_dbg(mtk_dp->dev, "Link train CR fail\n");
1568 break;
1569 }
1570 } else {
1571 /*
1572 * If the voltage level is changed, we need to
1573 * re-calculate this retry count.
1574 */
1575 voltage_retries = 0;
1576 }
1577 prev_lane_adjust = link_status[4];
1578 } while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
1579
1580 /* Failed to train CR, and disable pattern. */
1581 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
1582 DP_TRAINING_PATTERN_DISABLE);
1583 mtk_dp_train_set_pattern(mtk_dp, 0);
1584
1585 return -ETIMEDOUT;
1586}
1587
1588static int mtk_dp_train_eq(struct mtk_dp *mtk_dp, u8 target_lane_count)
1589{
1590 u8 lane_adjust[2] = {};
1591 u8 link_status[DP_LINK_STATUS_SIZE] = {};
1592 int train_retries = 0;
1593
1594 mtk_dp_pattern(mtk_dp, false);
1595
1596 do {
1597 train_retries++;
1598 if (!mtk_dp->train_info.cable_plugged_in) {
1599 mtk_dp_train_set_pattern(mtk_dp, 0);
1600 return -ENODEV;
1601 }
1602
1603 drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
1604 lane_adjust, sizeof(lane_adjust));
1605 mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
1606 lane_adjust);
1607
1608 drm_dp_link_train_channel_eq_delay(&mtk_dp->aux,
1609 mtk_dp->rx_cap);
1610
1611 /* check link status from sink device */
1612 drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
1613 if (drm_dp_channel_eq_ok(link_status, target_lane_count)) {
1614 dev_dbg(mtk_dp->dev, "Link train EQ pass\n");
1615
1616 /* Training done, and disable pattern. */
1617 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
1618 DP_TRAINING_PATTERN_DISABLE);
1619 mtk_dp_train_set_pattern(mtk_dp, 0);
1620 return 0;
1621 }
1622 dev_dbg(mtk_dp->dev, "Link train EQ fail\n");
1623 } while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
1624
1625 /* Failed to train EQ, and disable pattern. */
1626 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
1627 DP_TRAINING_PATTERN_DISABLE);
1628 mtk_dp_train_set_pattern(mtk_dp, 0);
1629
1630 return -ETIMEDOUT;
1631}
1632
1633static int mtk_dp_parse_capabilities(struct mtk_dp *mtk_dp)
1634{
1635 u8 val;
1636 ssize_t ret;
1637
1638 /*
1639 * If we're eDP and capabilities were already parsed we can skip
1640 * reading again because eDP panels aren't hotpluggable hence the
1641 * caps and training information won't ever change in a boot life
1642 */
1643 if (mtk_dp->bridge.type == DRM_MODE_CONNECTOR_eDP &&
1644 mtk_dp->rx_cap[DP_MAX_LINK_RATE] &&
1645 mtk_dp->train_info.sink_ssc)
1646 return 0;
1647
1648 ret = drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap);
1649 if (ret < 0)
1650 return ret;
1651
1652 if (drm_dp_tps4_supported(mtk_dp->rx_cap))
1653 mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_4;
1654 else if (drm_dp_tps3_supported(mtk_dp->rx_cap))
1655 mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_3;
1656 else
1657 mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_2;
1658
1659 mtk_dp->train_info.sink_ssc = drm_dp_max_downspread(mtk_dp->rx_cap);
1660
1661 ret = drm_dp_dpcd_readb(&mtk_dp->aux, DP_MSTM_CAP, &val);
1662 if (ret < 1) {
1663 drm_err(mtk_dp->drm_dev, "Read mstm cap failed\n");
1664 return ret == 0 ? -EIO : ret;
1665 }
1666
1667 if (val & DP_MST_CAP) {
1668 /* Clear DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 */
1669 ret = drm_dp_dpcd_readb(&mtk_dp->aux,
1670 DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
1671 &val);
1672 if (ret < 1) {
1673 drm_err(mtk_dp->drm_dev, "Read irq vector failed\n");
1674 return ret == 0 ? -EIO : ret;
1675 }
1676
1677 if (val) {
1678 ret = drm_dp_dpcd_writeb(&mtk_dp->aux,
1679 DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
1680 val);
1681 if (ret < 0)
1682 return ret;
1683 }
1684 }
1685
1686 return 0;
1687}
1688
1689static bool mtk_dp_edid_parse_audio_capabilities(struct mtk_dp *mtk_dp,
1690 struct mtk_dp_audio_cfg *cfg)
1691{
1692 if (!mtk_dp->data->audio_supported)
1693 return false;
1694
1695 if (mtk_dp->info.audio_cur_cfg.sad_count <= 0) {
1696 drm_info(mtk_dp->drm_dev, "The SADs is NULL\n");
1697 return false;
1698 }
1699
1700 return true;
1701}
1702
1703static void mtk_dp_train_change_mode(struct mtk_dp *mtk_dp)
1704{
1705 phy_reset(mtk_dp->phy);
1706 mtk_dp_reset_swing_pre_emphasis(mtk_dp);
1707}
1708
1709static int mtk_dp_training(struct mtk_dp *mtk_dp)
1710{
1711 int ret;
1712 u8 lane_count, link_rate, train_limit, max_link_rate;
1713
1714 link_rate = min_t(u8, mtk_dp->max_linkrate,
1715 mtk_dp->rx_cap[DP_MAX_LINK_RATE]);
1716 max_link_rate = link_rate;
1717 lane_count = min_t(u8, mtk_dp->max_lanes,
1718 drm_dp_max_lane_count(mtk_dp->rx_cap));
1719
1720 /*
1721 * TPS are generated by the hardware pattern generator. From the
1722 * hardware setting we need to disable this scramble setting before
1723 * use the TPS pattern generator.
1724 */
1725 mtk_dp_training_set_scramble(mtk_dp, false);
1726
1727 for (train_limit = 6; train_limit > 0; train_limit--) {
1728 mtk_dp_train_change_mode(mtk_dp);
1729
1730 ret = mtk_dp_train_setting(mtk_dp, link_rate, lane_count);
1731 if (ret)
1732 return ret;
1733
1734 ret = mtk_dp_train_cr(mtk_dp, lane_count);
1735 if (ret == -ENODEV) {
1736 return ret;
1737 } else if (ret) {
1738 /* reduce link rate */
1739 switch (link_rate) {
1740 case DP_LINK_BW_1_62:
1741 lane_count = lane_count / 2;
1742 link_rate = max_link_rate;
1743 if (lane_count == 0)
1744 return -EIO;
1745 break;
1746 case DP_LINK_BW_2_7:
1747 link_rate = DP_LINK_BW_1_62;
1748 break;
1749 case DP_LINK_BW_5_4:
1750 link_rate = DP_LINK_BW_2_7;
1751 break;
1752 case DP_LINK_BW_8_1:
1753 link_rate = DP_LINK_BW_5_4;
1754 break;
1755 default:
1756 return -EINVAL;
1757 }
1758 continue;
1759 }
1760
1761 ret = mtk_dp_train_eq(mtk_dp, lane_count);
1762 if (ret == -ENODEV) {
1763 return ret;
1764 } else if (ret) {
1765 /* reduce lane count */
1766 if (lane_count == 0)
1767 return -EIO;
1768 lane_count /= 2;
1769 continue;
1770 }
1771
1772 /* if we can run to this, training is done. */
1773 break;
1774 }
1775
1776 if (train_limit == 0)
1777 return -ETIMEDOUT;
1778
1779 mtk_dp->train_info.link_rate = link_rate;
1780 mtk_dp->train_info.lane_count = lane_count;
1781
1782 /*
1783 * After training done, we need to output normal stream instead of TPS,
1784 * so we need to enable scramble.
1785 */
1786 mtk_dp_training_set_scramble(mtk_dp, true);
1787 mtk_dp_set_enhanced_frame_mode(mtk_dp);
1788
1789 return 0;
1790}
1791
1792static void mtk_dp_video_enable(struct mtk_dp *mtk_dp, bool enable)
1793{
1794 /* the mute sequence is different between enable and disable */
1795 if (enable) {
1796 mtk_dp_msa_bypass_enable(mtk_dp, false);
1797 mtk_dp_pg_enable(mtk_dp, false);
1798 mtk_dp_set_tx_out(mtk_dp);
1799 mtk_dp_video_mute(mtk_dp, false);
1800 } else {
1801 mtk_dp_video_mute(mtk_dp, true);
1802 mtk_dp_pg_enable(mtk_dp, true);
1803 mtk_dp_msa_bypass_enable(mtk_dp, true);
1804 }
1805}
1806
1807static void mtk_dp_audio_sdp_setup(struct mtk_dp *mtk_dp,
1808 struct mtk_dp_audio_cfg *cfg)
1809{
1810 struct dp_sdp sdp;
1811 struct hdmi_audio_infoframe frame;
1812
1813 hdmi_audio_infoframe_init(&frame);
1814 frame.coding_type = HDMI_AUDIO_CODING_TYPE_PCM;
1815 frame.channels = cfg->channels;
1816 frame.sample_frequency = cfg->sample_rate;
1817
1818 switch (cfg->word_length_bits) {
1819 case 16:
1820 frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1821 break;
1822 case 20:
1823 frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_20;
1824 break;
1825 case 24:
1826 default:
1827 frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_24;
1828 break;
1829 }
1830
1831 hdmi_audio_infoframe_pack_for_dp(&frame, &sdp, MTK_DP_VERSION);
1832
1833 mtk_dp_audio_sdp_asp_set_channels(mtk_dp, cfg->channels);
1834 mtk_dp_setup_sdp_aui(mtk_dp, &sdp);
1835}
1836
1837static void mtk_dp_audio_setup(struct mtk_dp *mtk_dp,
1838 struct mtk_dp_audio_cfg *cfg)
1839{
1840 mtk_dp_audio_sdp_setup(mtk_dp, cfg);
1841 mtk_dp_audio_channel_status_set(mtk_dp, cfg);
1842
1843 mtk_dp_audio_setup_channels(mtk_dp, cfg);
1844 mtk_dp_audio_set_divider(mtk_dp);
1845}
1846
1847static int mtk_dp_video_config(struct mtk_dp *mtk_dp)
1848{
1849 mtk_dp_config_mn_mode(mtk_dp);
1850 mtk_dp_set_msa(mtk_dp);
1851 mtk_dp_set_color_depth(mtk_dp);
1852 return mtk_dp_set_color_format(mtk_dp, mtk_dp->info.format);
1853}
1854
1855static void mtk_dp_init_port(struct mtk_dp *mtk_dp)
1856{
1857 mtk_dp_set_idle_pattern(mtk_dp, true);
1858 mtk_dp_initialize_priv_data(mtk_dp);
1859
1860 mtk_dp_initialize_settings(mtk_dp);
1861 mtk_dp_initialize_aux_settings(mtk_dp);
1862 mtk_dp_initialize_digital_settings(mtk_dp);
1863 mtk_dp_initialize_hpd_detect_settings(mtk_dp);
1864
1865 mtk_dp_digital_sw_reset(mtk_dp);
1866}
1867
1868static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
1869{
1870 struct mtk_dp *mtk_dp = dev;
1871 unsigned long flags;
1872 u32 status;
1873
1874 if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
1875 msleep(100);
1876
1877 spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
1878 status = mtk_dp->irq_thread_handle;
1879 mtk_dp->irq_thread_handle = 0;
1880 spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
1881
1882 if (status & MTK_DP_THREAD_CABLE_STATE_CHG) {
1883 if (mtk_dp->bridge.dev)
1884 drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
1885
1886 if (!mtk_dp->train_info.cable_plugged_in) {
1887 mtk_dp_disable_sdp_aui(mtk_dp);
1888 memset(&mtk_dp->info.audio_cur_cfg, 0,
1889 sizeof(mtk_dp->info.audio_cur_cfg));
1890
1891 mtk_dp->need_debounce = false;
1892 mod_timer(&mtk_dp->debounce_timer,
1893 jiffies + msecs_to_jiffies(100) - 1);
1894 }
1895 }
1896
1897 if (status & MTK_DP_THREAD_HPD_EVENT)
1898 dev_dbg(mtk_dp->dev, "Receive IRQ from sink devices\n");
1899
1900 return IRQ_HANDLED;
1901}
1902
1903static irqreturn_t mtk_dp_hpd_event(int hpd, void *dev)
1904{
1905 struct mtk_dp *mtk_dp = dev;
1906 bool cable_sta_chg = false;
1907 unsigned long flags;
1908 u32 irq_status = mtk_dp_swirq_get_clear(mtk_dp) |
1909 mtk_dp_hwirq_get_clear(mtk_dp);
1910
1911 if (!irq_status)
1912 return IRQ_HANDLED;
1913
1914 spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
1915
1916 if (irq_status & MTK_DP_HPD_INTERRUPT)
1917 mtk_dp->irq_thread_handle |= MTK_DP_THREAD_HPD_EVENT;
1918
1919 /* Cable state is changed. */
1920 if (irq_status != MTK_DP_HPD_INTERRUPT) {
1921 mtk_dp->irq_thread_handle |= MTK_DP_THREAD_CABLE_STATE_CHG;
1922 cable_sta_chg = true;
1923 }
1924
1925 spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
1926
1927 if (cable_sta_chg) {
1928 if (!!(mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3414) &
1929 HPD_DB_DP_TRANS_P0_MASK))
1930 mtk_dp->train_info.cable_plugged_in = true;
1931 else
1932 mtk_dp->train_info.cable_plugged_in = false;
1933 }
1934
1935 return IRQ_WAKE_THREAD;
1936}
1937
1938static int mtk_dp_wait_hpd_asserted(struct drm_dp_aux *mtk_aux, unsigned long wait_us)
1939{
1940 struct mtk_dp *mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
1941 u32 val;
1942 int ret;
1943
1944 ret = regmap_read_poll_timeout(mtk_dp->regs, MTK_DP_TRANS_P0_3414,
1945 val, !!(val & HPD_DB_DP_TRANS_P0_MASK),
1946 wait_us / 100, wait_us);
1947 if (ret) {
1948 mtk_dp->train_info.cable_plugged_in = false;
1949 return ret;
1950 }
1951
1952 mtk_dp->train_info.cable_plugged_in = true;
1953
1954 ret = mtk_dp_parse_capabilities(mtk_dp);
1955 if (ret) {
1956 drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
1957 return ret;
1958 }
1959
1960 return 0;
1961}
1962
1963static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp,
1964 struct platform_device *pdev)
1965{
1966 struct device_node *endpoint;
1967 struct device *dev = &pdev->dev;
1968 int ret;
1969 void __iomem *base;
1970 u32 linkrate;
1971 int len;
1972
1973 base = devm_platform_ioremap_resource(pdev, 0);
1974 if (IS_ERR(base))
1975 return PTR_ERR(base);
1976
1977 mtk_dp->regs = devm_regmap_init_mmio(dev, base, &mtk_dp_regmap_config);
1978 if (IS_ERR(mtk_dp->regs))
1979 return PTR_ERR(mtk_dp->regs);
1980
1981 endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1, -1);
1982 len = of_property_count_elems_of_size(endpoint,
1983 "data-lanes", sizeof(u32));
1984 if (len < 0 || len > 4 || len == 3) {
1985 dev_err(dev, "invalid data lane size: %d\n", len);
1986 return -EINVAL;
1987 }
1988
1989 mtk_dp->max_lanes = len;
1990
1991 ret = device_property_read_u32(dev, "max-linkrate-mhz", &linkrate);
1992 if (ret) {
1993 dev_err(dev, "failed to read max linkrate: %d\n", ret);
1994 return ret;
1995 }
1996
1997 mtk_dp->max_linkrate = drm_dp_link_rate_to_bw_code(linkrate * 100);
1998
1999 return 0;
2000}
2001
2002static void mtk_dp_update_plugged_status(struct mtk_dp *mtk_dp)
2003{
2004 if (!mtk_dp->data->audio_supported || !mtk_dp->audio_enable)
2005 return;
2006
2007 mutex_lock(&mtk_dp->update_plugged_status_lock);
2008 if (mtk_dp->plugged_cb && mtk_dp->codec_dev)
2009 mtk_dp->plugged_cb(mtk_dp->codec_dev,
2010 mtk_dp->enabled &
2011 mtk_dp->info.audio_cur_cfg.detect_monitor);
2012 mutex_unlock(&mtk_dp->update_plugged_status_lock);
2013}
2014
2015static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge)
2016{
2017 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2018 enum drm_connector_status ret = connector_status_disconnected;
2019 bool enabled = mtk_dp->enabled;
2020 u8 sink_count = 0;
2021
2022 if (!mtk_dp->train_info.cable_plugged_in)
2023 return ret;
2024
2025 if (!enabled)
2026 mtk_dp_aux_panel_poweron(mtk_dp, true);
2027
2028 /*
2029 * Some dongles still source HPD when they do not connect to any
2030 * sink device. To avoid this, we need to read the sink count
2031 * to make sure we do connect to sink devices. After this detect
2032 * function, we just need to check the HPD connection to check
2033 * whether we connect to a sink device.
2034 */
2035 drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT, &sink_count);
2036 if (DP_GET_SINK_COUNT(sink_count))
2037 ret = connector_status_connected;
2038
2039 if (!enabled)
2040 mtk_dp_aux_panel_poweron(mtk_dp, false);
2041
2042 return ret;
2043}
2044
2045static const struct drm_edid *mtk_dp_edid_read(struct drm_bridge *bridge,
2046 struct drm_connector *connector)
2047{
2048 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2049 bool enabled = mtk_dp->enabled;
2050 const struct drm_edid *drm_edid;
2051 struct mtk_dp_audio_cfg *audio_caps = &mtk_dp->info.audio_cur_cfg;
2052
2053 if (!enabled) {
2054 drm_atomic_bridge_chain_pre_enable(bridge, connector->state->state);
2055 mtk_dp_aux_panel_poweron(mtk_dp, true);
2056 }
2057
2058 drm_edid = drm_edid_read_ddc(connector, &mtk_dp->aux.ddc);
2059
2060 /*
2061 * Parse capability here to let atomic_get_input_bus_fmts and
2062 * mode_valid use the capability to calculate sink bitrates.
2063 */
2064 if (mtk_dp_parse_capabilities(mtk_dp)) {
2065 drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
2066 drm_edid_free(drm_edid);
2067 drm_edid = NULL;
2068 }
2069
2070 if (drm_edid) {
2071 /*
2072 * FIXME: get rid of drm_edid_raw()
2073 */
2074 const struct edid *edid = drm_edid_raw(drm_edid);
2075 struct cea_sad *sads;
2076
2077 audio_caps->sad_count = drm_edid_to_sad(edid, &sads);
2078 kfree(sads);
2079
2080 /*
2081 * FIXME: This should use connector->display_info.has_audio from
2082 * a path that has read the EDID and called
2083 * drm_edid_connector_update().
2084 */
2085 audio_caps->detect_monitor = drm_detect_monitor_audio(edid);
2086 }
2087
2088 if (!enabled) {
2089 mtk_dp_aux_panel_poweron(mtk_dp, false);
2090 drm_atomic_bridge_chain_post_disable(bridge, connector->state->state);
2091 }
2092
2093 return drm_edid;
2094}
2095
2096static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
2097 struct drm_dp_aux_msg *msg)
2098{
2099 struct mtk_dp *mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
2100 bool is_read;
2101 u8 request;
2102 size_t accessed_bytes = 0;
2103 int ret;
2104
2105 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP &&
2106 !mtk_dp->train_info.cable_plugged_in) {
2107 ret = -EIO;
2108 goto err;
2109 }
2110
2111 switch (msg->request) {
2112 case DP_AUX_I2C_MOT:
2113 case DP_AUX_I2C_WRITE:
2114 case DP_AUX_NATIVE_WRITE:
2115 case DP_AUX_I2C_WRITE_STATUS_UPDATE:
2116 case DP_AUX_I2C_WRITE_STATUS_UPDATE | DP_AUX_I2C_MOT:
2117 request = msg->request & ~DP_AUX_I2C_WRITE_STATUS_UPDATE;
2118 is_read = false;
2119 break;
2120 case DP_AUX_I2C_READ:
2121 case DP_AUX_NATIVE_READ:
2122 case DP_AUX_I2C_READ | DP_AUX_I2C_MOT:
2123 request = msg->request;
2124 is_read = true;
2125 break;
2126 default:
2127 dev_err(mtk_dp->dev, "invalid aux cmd = %d\n",
2128 msg->request);
2129 ret = -EINVAL;
2130 goto err;
2131 }
2132
2133 do {
2134 size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES,
2135 msg->size - accessed_bytes);
2136
2137 ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request,
2138 msg->address + accessed_bytes,
2139 msg->buffer + accessed_bytes,
2140 to_access, &msg->reply);
2141
2142 if (ret) {
2143 dev_info(mtk_dp->dev,
2144 "Failed to do AUX transfer: %d\n", ret);
2145 goto err;
2146 }
2147 accessed_bytes += to_access;
2148 } while (accessed_bytes < msg->size);
2149
2150 return msg->size;
2151err:
2152 msg->reply = DP_AUX_NATIVE_REPLY_NACK | DP_AUX_I2C_REPLY_NACK;
2153 return ret;
2154}
2155
2156static int mtk_dp_poweron(struct mtk_dp *mtk_dp)
2157{
2158 int ret;
2159
2160 ret = phy_init(mtk_dp->phy);
2161 if (ret) {
2162 dev_err(mtk_dp->dev, "Failed to initialize phy: %d\n", ret);
2163 return ret;
2164 }
2165
2166 mtk_dp_init_port(mtk_dp);
2167 mtk_dp_power_enable(mtk_dp);
2168
2169 return 0;
2170}
2171
2172static void mtk_dp_poweroff(struct mtk_dp *mtk_dp)
2173{
2174 mtk_dp_power_disable(mtk_dp);
2175 phy_exit(mtk_dp->phy);
2176}
2177
2178static int mtk_dp_bridge_attach(struct drm_bridge *bridge,
2179 enum drm_bridge_attach_flags flags)
2180{
2181 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2182 int ret;
2183
2184 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
2185 dev_err(mtk_dp->dev, "Driver does not provide a connector!");
2186 return -EINVAL;
2187 }
2188
2189 mtk_dp->aux.drm_dev = bridge->dev;
2190 ret = drm_dp_aux_register(&mtk_dp->aux);
2191 if (ret) {
2192 dev_err(mtk_dp->dev,
2193 "failed to register DP AUX channel: %d\n", ret);
2194 return ret;
2195 }
2196
2197 ret = mtk_dp_poweron(mtk_dp);
2198 if (ret)
2199 goto err_aux_register;
2200
2201 if (mtk_dp->next_bridge) {
2202 ret = drm_bridge_attach(bridge->encoder, mtk_dp->next_bridge,
2203 &mtk_dp->bridge, flags);
2204 if (ret) {
2205 drm_warn(mtk_dp->drm_dev,
2206 "Failed to attach external bridge: %d\n", ret);
2207 goto err_bridge_attach;
2208 }
2209 }
2210
2211 mtk_dp->drm_dev = bridge->dev;
2212
2213 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP) {
2214 irq_clear_status_flags(mtk_dp->irq, IRQ_NOAUTOEN);
2215 enable_irq(mtk_dp->irq);
2216 mtk_dp_hwirq_enable(mtk_dp, true);
2217 }
2218
2219 return 0;
2220
2221err_bridge_attach:
2222 mtk_dp_poweroff(mtk_dp);
2223err_aux_register:
2224 drm_dp_aux_unregister(&mtk_dp->aux);
2225 return ret;
2226}
2227
2228static void mtk_dp_bridge_detach(struct drm_bridge *bridge)
2229{
2230 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2231
2232 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP) {
2233 mtk_dp_hwirq_enable(mtk_dp, false);
2234 disable_irq(mtk_dp->irq);
2235 }
2236 mtk_dp->drm_dev = NULL;
2237 mtk_dp_poweroff(mtk_dp);
2238 drm_dp_aux_unregister(&mtk_dp->aux);
2239}
2240
2241static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge,
2242 struct drm_bridge_state *old_state)
2243{
2244 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2245 int ret;
2246
2247 mtk_dp->conn = drm_atomic_get_new_connector_for_encoder(old_state->base.state,
2248 bridge->encoder);
2249 if (!mtk_dp->conn) {
2250 drm_err(mtk_dp->drm_dev,
2251 "Can't enable bridge as connector is missing\n");
2252 return;
2253 }
2254
2255 mtk_dp_aux_panel_poweron(mtk_dp, true);
2256
2257 /* Training */
2258 ret = mtk_dp_training(mtk_dp);
2259 if (ret) {
2260 drm_err(mtk_dp->drm_dev, "Training failed, %d\n", ret);
2261 goto power_off_aux;
2262 }
2263
2264 ret = mtk_dp_video_config(mtk_dp);
2265 if (ret)
2266 goto power_off_aux;
2267
2268 mtk_dp_video_enable(mtk_dp, true);
2269
2270 mtk_dp->audio_enable =
2271 mtk_dp_edid_parse_audio_capabilities(mtk_dp,
2272 &mtk_dp->info.audio_cur_cfg);
2273 if (mtk_dp->audio_enable) {
2274 mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
2275 mtk_dp_audio_mute(mtk_dp, false);
2276 } else {
2277 memset(&mtk_dp->info.audio_cur_cfg, 0,
2278 sizeof(mtk_dp->info.audio_cur_cfg));
2279 }
2280
2281 mtk_dp->enabled = true;
2282 mtk_dp_update_plugged_status(mtk_dp);
2283
2284 return;
2285power_off_aux:
2286 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2287 DP_PWR_STATE_BANDGAP_TPLL,
2288 DP_PWR_STATE_MASK);
2289}
2290
2291static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge,
2292 struct drm_bridge_state *old_state)
2293{
2294 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2295
2296 mtk_dp->enabled = false;
2297 mtk_dp_update_plugged_status(mtk_dp);
2298 mtk_dp_video_enable(mtk_dp, false);
2299 mtk_dp_audio_mute(mtk_dp, true);
2300
2301 if (mtk_dp->train_info.cable_plugged_in) {
2302 drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
2303 usleep_range(2000, 3000);
2304 }
2305
2306 /* power off aux */
2307 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2308 DP_PWR_STATE_BANDGAP_TPLL,
2309 DP_PWR_STATE_MASK);
2310
2311 /* Ensure the sink is muted */
2312 msleep(20);
2313}
2314
2315static enum drm_mode_status
2316mtk_dp_bridge_mode_valid(struct drm_bridge *bridge,
2317 const struct drm_display_info *info,
2318 const struct drm_display_mode *mode)
2319{
2320 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2321 u32 bpp = info->color_formats & DRM_COLOR_FORMAT_YCBCR422 ? 16 : 24;
2322 u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
2323 drm_dp_max_lane_count(mtk_dp->rx_cap),
2324 drm_dp_bw_code_to_link_rate(mtk_dp->max_linkrate) *
2325 mtk_dp->max_lanes);
2326
2327 if (rate < mode->clock * bpp / 8)
2328 return MODE_CLOCK_HIGH;
2329
2330 return MODE_OK;
2331}
2332
2333static u32 *mtk_dp_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
2334 struct drm_bridge_state *bridge_state,
2335 struct drm_crtc_state *crtc_state,
2336 struct drm_connector_state *conn_state,
2337 unsigned int *num_output_fmts)
2338{
2339 u32 *output_fmts;
2340
2341 *num_output_fmts = 0;
2342 output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
2343 if (!output_fmts)
2344 return NULL;
2345 *num_output_fmts = 1;
2346 output_fmts[0] = MEDIA_BUS_FMT_FIXED;
2347 return output_fmts;
2348}
2349
2350static const u32 mt8195_input_fmts[] = {
2351 MEDIA_BUS_FMT_RGB888_1X24,
2352 MEDIA_BUS_FMT_YUV8_1X24,
2353 MEDIA_BUS_FMT_YUYV8_1X16,
2354};
2355
2356static u32 *mtk_dp_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
2357 struct drm_bridge_state *bridge_state,
2358 struct drm_crtc_state *crtc_state,
2359 struct drm_connector_state *conn_state,
2360 u32 output_fmt,
2361 unsigned int *num_input_fmts)
2362{
2363 u32 *input_fmts;
2364 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2365 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
2366 struct drm_display_info *display_info =
2367 &conn_state->connector->display_info;
2368 u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
2369 drm_dp_max_lane_count(mtk_dp->rx_cap),
2370 drm_dp_bw_code_to_link_rate(mtk_dp->max_linkrate) *
2371 mtk_dp->max_lanes);
2372
2373 *num_input_fmts = 0;
2374
2375 /*
2376 * If the linkrate is smaller than datarate of RGB888, larger than
2377 * datarate of YUV422 and sink device supports YUV422, we output YUV422
2378 * format. Use this condition, we can support more resolution.
2379 */
2380 if ((rate < (mode->clock * 24 / 8)) &&
2381 (rate > (mode->clock * 16 / 8)) &&
2382 (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR422)) {
2383 input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL);
2384 if (!input_fmts)
2385 return NULL;
2386 *num_input_fmts = 1;
2387 input_fmts[0] = MEDIA_BUS_FMT_YUYV8_1X16;
2388 } else {
2389 input_fmts = kcalloc(ARRAY_SIZE(mt8195_input_fmts),
2390 sizeof(*input_fmts),
2391 GFP_KERNEL);
2392 if (!input_fmts)
2393 return NULL;
2394
2395 *num_input_fmts = ARRAY_SIZE(mt8195_input_fmts);
2396 memcpy(input_fmts, mt8195_input_fmts, sizeof(mt8195_input_fmts));
2397 }
2398
2399 return input_fmts;
2400}
2401
2402static int mtk_dp_bridge_atomic_check(struct drm_bridge *bridge,
2403 struct drm_bridge_state *bridge_state,
2404 struct drm_crtc_state *crtc_state,
2405 struct drm_connector_state *conn_state)
2406{
2407 struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
2408 struct drm_crtc *crtc = conn_state->crtc;
2409 unsigned int input_bus_format;
2410
2411 input_bus_format = bridge_state->input_bus_cfg.format;
2412
2413 dev_dbg(mtk_dp->dev, "input format 0x%04x, output format 0x%04x\n",
2414 bridge_state->input_bus_cfg.format,
2415 bridge_state->output_bus_cfg.format);
2416
2417 if (input_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
2418 mtk_dp->info.format = DP_PIXELFORMAT_YUV422;
2419 else
2420 mtk_dp->info.format = DP_PIXELFORMAT_RGB;
2421
2422 if (!crtc) {
2423 drm_err(mtk_dp->drm_dev,
2424 "Can't enable bridge as connector state doesn't have a crtc\n");
2425 return -EINVAL;
2426 }
2427
2428 drm_display_mode_to_videomode(&crtc_state->adjusted_mode, &mtk_dp->info.vm);
2429
2430 return 0;
2431}
2432
2433static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
2434 .atomic_check = mtk_dp_bridge_atomic_check,
2435 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
2436 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
2437 .atomic_get_output_bus_fmts = mtk_dp_bridge_atomic_get_output_bus_fmts,
2438 .atomic_get_input_bus_fmts = mtk_dp_bridge_atomic_get_input_bus_fmts,
2439 .atomic_reset = drm_atomic_helper_bridge_reset,
2440 .attach = mtk_dp_bridge_attach,
2441 .detach = mtk_dp_bridge_detach,
2442 .atomic_enable = mtk_dp_bridge_atomic_enable,
2443 .atomic_disable = mtk_dp_bridge_atomic_disable,
2444 .mode_valid = mtk_dp_bridge_mode_valid,
2445 .edid_read = mtk_dp_edid_read,
2446 .detect = mtk_dp_bdg_detect,
2447};
2448
2449static void mtk_dp_debounce_timer(struct timer_list *t)
2450{
2451 struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
2452
2453 mtk_dp->need_debounce = true;
2454}
2455
2456/*
2457 * HDMI audio codec callbacks
2458 */
2459static int mtk_dp_audio_hw_params(struct device *dev, void *data,
2460 struct hdmi_codec_daifmt *daifmt,
2461 struct hdmi_codec_params *params)
2462{
2463 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2464
2465 if (!mtk_dp->enabled) {
2466 dev_err(mtk_dp->dev, "%s, DP is not ready!\n", __func__);
2467 return -ENODEV;
2468 }
2469
2470 mtk_dp->info.audio_cur_cfg.channels = params->cea.channels;
2471 mtk_dp->info.audio_cur_cfg.sample_rate = params->sample_rate;
2472
2473 mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
2474
2475 return 0;
2476}
2477
2478static int mtk_dp_audio_startup(struct device *dev, void *data)
2479{
2480 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2481
2482 mtk_dp_audio_mute(mtk_dp, false);
2483
2484 return 0;
2485}
2486
2487static void mtk_dp_audio_shutdown(struct device *dev, void *data)
2488{
2489 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2490
2491 mtk_dp_audio_mute(mtk_dp, true);
2492}
2493
2494static int mtk_dp_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
2495 size_t len)
2496{
2497 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2498
2499 if (mtk_dp->enabled)
2500 memcpy(buf, mtk_dp->conn->eld, len);
2501 else
2502 memset(buf, 0, len);
2503
2504 return 0;
2505}
2506
2507static int mtk_dp_audio_hook_plugged_cb(struct device *dev, void *data,
2508 hdmi_codec_plugged_cb fn,
2509 struct device *codec_dev)
2510{
2511 struct mtk_dp *mtk_dp = data;
2512
2513 mutex_lock(&mtk_dp->update_plugged_status_lock);
2514 mtk_dp->plugged_cb = fn;
2515 mtk_dp->codec_dev = codec_dev;
2516 mutex_unlock(&mtk_dp->update_plugged_status_lock);
2517
2518 mtk_dp_update_plugged_status(mtk_dp);
2519
2520 return 0;
2521}
2522
2523static const struct hdmi_codec_ops mtk_dp_audio_codec_ops = {
2524 .hw_params = mtk_dp_audio_hw_params,
2525 .audio_startup = mtk_dp_audio_startup,
2526 .audio_shutdown = mtk_dp_audio_shutdown,
2527 .get_eld = mtk_dp_audio_get_eld,
2528 .hook_plugged_cb = mtk_dp_audio_hook_plugged_cb,
2529 .no_capture_mute = 1,
2530};
2531
2532static int mtk_dp_register_audio_driver(struct device *dev)
2533{
2534 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2535 struct hdmi_codec_pdata codec_data = {
2536 .ops = &mtk_dp_audio_codec_ops,
2537 .max_i2s_channels = 8,
2538 .i2s = 1,
2539 .data = mtk_dp,
2540 };
2541
2542 mtk_dp->audio_pdev = platform_device_register_data(dev,
2543 HDMI_CODEC_DRV_NAME,
2544 PLATFORM_DEVID_AUTO,
2545 &codec_data,
2546 sizeof(codec_data));
2547 return PTR_ERR_OR_ZERO(mtk_dp->audio_pdev);
2548}
2549
2550static int mtk_dp_register_phy(struct mtk_dp *mtk_dp)
2551{
2552 struct device *dev = mtk_dp->dev;
2553
2554 mtk_dp->phy_dev = platform_device_register_data(dev, "mediatek-dp-phy",
2555 PLATFORM_DEVID_AUTO,
2556 &mtk_dp->regs,
2557 sizeof(struct regmap *));
2558 if (IS_ERR(mtk_dp->phy_dev))
2559 return dev_err_probe(dev, PTR_ERR(mtk_dp->phy_dev),
2560 "Failed to create device mediatek-dp-phy\n");
2561
2562 mtk_dp_get_calibration_data(mtk_dp);
2563
2564 mtk_dp->phy = devm_phy_get(&mtk_dp->phy_dev->dev, "dp");
2565 if (IS_ERR(mtk_dp->phy)) {
2566 platform_device_unregister(mtk_dp->phy_dev);
2567 return dev_err_probe(dev, PTR_ERR(mtk_dp->phy), "Failed to get phy\n");
2568 }
2569
2570 return 0;
2571}
2572
2573static int mtk_dp_edp_link_panel(struct drm_dp_aux *mtk_aux)
2574{
2575 struct mtk_dp *mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
2576 struct device *dev = mtk_aux->dev;
2577 int ret;
2578
2579 mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
2580
2581 /* Power off the DP and AUX: either detection is done, or no panel present */
2582 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2583 DP_PWR_STATE_BANDGAP_TPLL,
2584 DP_PWR_STATE_MASK);
2585 mtk_dp_power_disable(mtk_dp);
2586
2587 if (IS_ERR(mtk_dp->next_bridge)) {
2588 ret = PTR_ERR(mtk_dp->next_bridge);
2589 mtk_dp->next_bridge = NULL;
2590 return ret;
2591 }
2592
2593 /* For eDP, we add the bridge only if the panel was found */
2594 ret = devm_drm_bridge_add(dev, &mtk_dp->bridge);
2595 if (ret)
2596 return ret;
2597
2598 return 0;
2599}
2600
2601static int mtk_dp_probe(struct platform_device *pdev)
2602{
2603 struct mtk_dp *mtk_dp;
2604 struct device *dev = &pdev->dev;
2605 int ret;
2606
2607 mtk_dp = devm_kzalloc(dev, sizeof(*mtk_dp), GFP_KERNEL);
2608 if (!mtk_dp)
2609 return -ENOMEM;
2610
2611 mtk_dp->dev = dev;
2612 mtk_dp->data = (struct mtk_dp_data *)of_device_get_match_data(dev);
2613
2614 ret = mtk_dp_dt_parse(mtk_dp, pdev);
2615 if (ret)
2616 return dev_err_probe(dev, ret, "Failed to parse dt\n");
2617
2618 /*
2619 * Request the interrupt and install service routine only if we are
2620 * on full DisplayPort.
2621 * For eDP, polling the HPD instead is more convenient because we
2622 * don't expect any (un)plug events during runtime, hence we can
2623 * avoid some locking.
2624 */
2625 if (mtk_dp->data->bridge_type != DRM_MODE_CONNECTOR_eDP) {
2626 mtk_dp->irq = platform_get_irq(pdev, 0);
2627 if (mtk_dp->irq < 0)
2628 return dev_err_probe(dev, mtk_dp->irq,
2629 "failed to request dp irq resource\n");
2630
2631 spin_lock_init(&mtk_dp->irq_thread_lock);
2632
2633 irq_set_status_flags(mtk_dp->irq, IRQ_NOAUTOEN);
2634 ret = devm_request_threaded_irq(dev, mtk_dp->irq, mtk_dp_hpd_event,
2635 mtk_dp_hpd_event_thread,
2636 IRQ_TYPE_LEVEL_HIGH, dev_name(dev),
2637 mtk_dp);
2638 if (ret)
2639 return dev_err_probe(dev, ret,
2640 "failed to request mediatek dptx irq\n");
2641
2642 mtk_dp->need_debounce = true;
2643 timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
2644 }
2645
2646 mtk_dp->aux.name = "aux_mtk_dp";
2647 mtk_dp->aux.dev = dev;
2648 mtk_dp->aux.transfer = mtk_dp_aux_transfer;
2649 mtk_dp->aux.wait_hpd_asserted = mtk_dp_wait_hpd_asserted;
2650 drm_dp_aux_init(&mtk_dp->aux);
2651
2652 platform_set_drvdata(pdev, mtk_dp);
2653
2654 if (mtk_dp->data->audio_supported) {
2655 mutex_init(&mtk_dp->update_plugged_status_lock);
2656
2657 ret = mtk_dp_register_audio_driver(dev);
2658 if (ret) {
2659 dev_err(dev, "Failed to register audio driver: %d\n",
2660 ret);
2661 return ret;
2662 }
2663 }
2664
2665 ret = mtk_dp_register_phy(mtk_dp);
2666 if (ret)
2667 return ret;
2668
2669 mtk_dp->bridge.funcs = &mtk_dp_bridge_funcs;
2670 mtk_dp->bridge.of_node = dev->of_node;
2671 mtk_dp->bridge.type = mtk_dp->data->bridge_type;
2672
2673 if (mtk_dp->bridge.type == DRM_MODE_CONNECTOR_eDP) {
2674 /*
2675 * Set the data lanes to idle in case the bootloader didn't
2676 * properly close the eDP port to avoid stalls and then
2677 * reinitialize, reset and power on the AUX block.
2678 */
2679 mtk_dp_set_idle_pattern(mtk_dp, true);
2680 mtk_dp_initialize_aux_settings(mtk_dp);
2681 mtk_dp_power_enable(mtk_dp);
2682
2683 /* Disable HW interrupts: we don't need any for eDP */
2684 mtk_dp_hwirq_enable(mtk_dp, false);
2685
2686 /*
2687 * Power on the AUX to allow reading the EDID from aux-bus:
2688 * please note that it is necessary to call power off in the
2689 * .done_probing() callback (mtk_dp_edp_link_panel), as only
2690 * there we can safely assume that we finished reading EDID.
2691 */
2692 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2693 DP_PWR_STATE_BANDGAP_TPLL_LANE,
2694 DP_PWR_STATE_MASK);
2695
2696 ret = devm_of_dp_aux_populate_bus(&mtk_dp->aux, mtk_dp_edp_link_panel);
2697 if (ret) {
2698 /* -ENODEV this means that the panel is not on the aux-bus */
2699 if (ret == -ENODEV) {
2700 ret = mtk_dp_edp_link_panel(&mtk_dp->aux);
2701 if (ret)
2702 return ret;
2703 } else {
2704 mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
2705 DP_PWR_STATE_BANDGAP_TPLL,
2706 DP_PWR_STATE_MASK);
2707 mtk_dp_power_disable(mtk_dp);
2708 return ret;
2709 }
2710 }
2711 } else {
2712 mtk_dp->bridge.ops = DRM_BRIDGE_OP_DETECT |
2713 DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
2714 ret = devm_drm_bridge_add(dev, &mtk_dp->bridge);
2715 if (ret)
2716 return dev_err_probe(dev, ret, "Failed to add bridge\n");
2717 }
2718
2719 pm_runtime_enable(dev);
2720 pm_runtime_get_sync(dev);
2721
2722 return 0;
2723}
2724
2725static void mtk_dp_remove(struct platform_device *pdev)
2726{
2727 struct mtk_dp *mtk_dp = platform_get_drvdata(pdev);
2728
2729 pm_runtime_put(&pdev->dev);
2730 pm_runtime_disable(&pdev->dev);
2731 if (mtk_dp->data->bridge_type != DRM_MODE_CONNECTOR_eDP)
2732 del_timer_sync(&mtk_dp->debounce_timer);
2733 platform_device_unregister(mtk_dp->phy_dev);
2734 if (mtk_dp->audio_pdev)
2735 platform_device_unregister(mtk_dp->audio_pdev);
2736}
2737
2738#ifdef CONFIG_PM_SLEEP
2739static int mtk_dp_suspend(struct device *dev)
2740{
2741 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2742
2743 mtk_dp_power_disable(mtk_dp);
2744 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP)
2745 mtk_dp_hwirq_enable(mtk_dp, false);
2746 pm_runtime_put_sync(dev);
2747
2748 return 0;
2749}
2750
2751static int mtk_dp_resume(struct device *dev)
2752{
2753 struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
2754
2755 pm_runtime_get_sync(dev);
2756 mtk_dp_init_port(mtk_dp);
2757 if (mtk_dp->bridge.type != DRM_MODE_CONNECTOR_eDP)
2758 mtk_dp_hwirq_enable(mtk_dp, true);
2759 mtk_dp_power_enable(mtk_dp);
2760
2761 return 0;
2762}
2763#endif
2764
2765static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend, mtk_dp_resume);
2766
2767static const struct mtk_dp_data mt8188_dp_data = {
2768 .bridge_type = DRM_MODE_CONNECTOR_DisplayPort,
2769 .smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
2770 .efuse_fmt = mt8195_dp_efuse_fmt,
2771 .audio_supported = true,
2772 .audio_pkt_in_hblank_area = true,
2773 .audio_m_div2_bit = MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
2774};
2775
2776static const struct mtk_dp_data mt8195_edp_data = {
2777 .bridge_type = DRM_MODE_CONNECTOR_eDP,
2778 .smc_cmd = MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE,
2779 .efuse_fmt = mt8195_edp_efuse_fmt,
2780 .audio_supported = false,
2781 .audio_m_div2_bit = MT8195_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
2782};
2783
2784static const struct mtk_dp_data mt8195_dp_data = {
2785 .bridge_type = DRM_MODE_CONNECTOR_DisplayPort,
2786 .smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
2787 .efuse_fmt = mt8195_dp_efuse_fmt,
2788 .audio_supported = true,
2789 .audio_m_div2_bit = MT8195_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
2790};
2791
2792static const struct of_device_id mtk_dp_of_match[] = {
2793 {
2794 .compatible = "mediatek,mt8188-edp-tx",
2795 .data = &mt8195_edp_data,
2796 },
2797 {
2798 .compatible = "mediatek,mt8188-dp-tx",
2799 .data = &mt8188_dp_data,
2800 },
2801 {
2802 .compatible = "mediatek,mt8195-edp-tx",
2803 .data = &mt8195_edp_data,
2804 },
2805 {
2806 .compatible = "mediatek,mt8195-dp-tx",
2807 .data = &mt8195_dp_data,
2808 },
2809 {},
2810};
2811MODULE_DEVICE_TABLE(of, mtk_dp_of_match);
2812
2813static struct platform_driver mtk_dp_driver = {
2814 .probe = mtk_dp_probe,
2815 .remove_new = mtk_dp_remove,
2816 .driver = {
2817 .name = "mediatek-drm-dp",
2818 .of_match_table = mtk_dp_of_match,
2819 .pm = &mtk_dp_pm_ops,
2820 },
2821};
2822
2823module_platform_driver(mtk_dp_driver);
2824
2825MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>");
2826MODULE_AUTHOR("Markus Schneider-Pargmann <msp@baylibre.com>");
2827MODULE_AUTHOR("Bo-Chen Chen <rex-bc.chen@mediatek.com>");
2828MODULE_DESCRIPTION("MediaTek DisplayPort Driver");
2829MODULE_LICENSE("GPL");
2830MODULE_SOFTDEP("pre: phy_mtk_dp");