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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 */
5
6#include <linux/clk.h>
7#include <linux/component.h>
8#include <linux/iopoll.h>
9#include <linux/irq.h>
10#include <linux/of.h>
11#include <linux/of_platform.h>
12#include <linux/phy/phy.h>
13#include <linux/platform_device.h>
14#include <linux/reset.h>
15
16#include <video/mipi_display.h>
17#include <video/videomode.h>
18
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_bridge.h>
21#include <drm/drm_bridge_connector.h>
22#include <drm/drm_mipi_dsi.h>
23#include <drm/drm_of.h>
24#include <drm/drm_panel.h>
25#include <drm/drm_print.h>
26#include <drm/drm_probe_helper.h>
27#include <drm/drm_simple_kms_helper.h>
28
29#include "mtk_disp_drv.h"
30#include "mtk_drm_ddp_comp.h"
31#include "mtk_drm_drv.h"
32
33#define DSI_START 0x00
34
35#define DSI_INTEN 0x08
36
37#define DSI_INTSTA 0x0c
38#define LPRX_RD_RDY_INT_FLAG BIT(0)
39#define CMD_DONE_INT_FLAG BIT(1)
40#define TE_RDY_INT_FLAG BIT(2)
41#define VM_DONE_INT_FLAG BIT(3)
42#define EXT_TE_RDY_INT_FLAG BIT(4)
43#define DSI_BUSY BIT(31)
44
45#define DSI_CON_CTRL 0x10
46#define DSI_RESET BIT(0)
47#define DSI_EN BIT(1)
48#define DPHY_RESET BIT(2)
49
50#define DSI_MODE_CTRL 0x14
51#define MODE (3)
52#define CMD_MODE 0
53#define SYNC_PULSE_MODE 1
54#define SYNC_EVENT_MODE 2
55#define BURST_MODE 3
56#define FRM_MODE BIT(16)
57#define MIX_MODE BIT(17)
58
59#define DSI_TXRX_CTRL 0x18
60#define VC_NUM BIT(1)
61#define LANE_NUM (0xf << 2)
62#define DIS_EOT BIT(6)
63#define NULL_EN BIT(7)
64#define TE_FREERUN BIT(8)
65#define EXT_TE_EN BIT(9)
66#define EXT_TE_EDGE BIT(10)
67#define MAX_RTN_SIZE (0xf << 12)
68#define HSTX_CKLP_EN BIT(16)
69
70#define DSI_PSCTRL 0x1c
71#define DSI_PS_WC 0x3fff
72#define DSI_PS_SEL (3 << 16)
73#define PACKED_PS_16BIT_RGB565 (0 << 16)
74#define LOOSELY_PS_18BIT_RGB666 (1 << 16)
75#define PACKED_PS_18BIT_RGB666 (2 << 16)
76#define PACKED_PS_24BIT_RGB888 (3 << 16)
77
78#define DSI_VSA_NL 0x20
79#define DSI_VBP_NL 0x24
80#define DSI_VFP_NL 0x28
81#define DSI_VACT_NL 0x2C
82#define DSI_SIZE_CON 0x38
83#define DSI_HSA_WC 0x50
84#define DSI_HBP_WC 0x54
85#define DSI_HFP_WC 0x58
86
87#define DSI_CMDQ_SIZE 0x60
88#define CMDQ_SIZE 0x3f
89#define CMDQ_SIZE_SEL BIT(15)
90
91#define DSI_HSTX_CKL_WC 0x64
92
93#define DSI_RX_DATA0 0x74
94#define DSI_RX_DATA1 0x78
95#define DSI_RX_DATA2 0x7c
96#define DSI_RX_DATA3 0x80
97
98#define DSI_RACK 0x84
99#define RACK BIT(0)
100
101#define DSI_PHY_LCCON 0x104
102#define LC_HS_TX_EN BIT(0)
103#define LC_ULPM_EN BIT(1)
104#define LC_WAKEUP_EN BIT(2)
105
106#define DSI_PHY_LD0CON 0x108
107#define LD0_HS_TX_EN BIT(0)
108#define LD0_ULPM_EN BIT(1)
109#define LD0_WAKEUP_EN BIT(2)
110
111#define DSI_PHY_TIMECON0 0x110
112#define LPX (0xff << 0)
113#define HS_PREP (0xff << 8)
114#define HS_ZERO (0xff << 16)
115#define HS_TRAIL (0xff << 24)
116
117#define DSI_PHY_TIMECON1 0x114
118#define TA_GO (0xff << 0)
119#define TA_SURE (0xff << 8)
120#define TA_GET (0xff << 16)
121#define DA_HS_EXIT (0xff << 24)
122
123#define DSI_PHY_TIMECON2 0x118
124#define CONT_DET (0xff << 0)
125#define CLK_ZERO (0xff << 16)
126#define CLK_TRAIL (0xff << 24)
127
128#define DSI_PHY_TIMECON3 0x11c
129#define CLK_HS_PREP (0xff << 0)
130#define CLK_HS_POST (0xff << 8)
131#define CLK_HS_EXIT (0xff << 16)
132
133#define DSI_VM_CMD_CON 0x130
134#define VM_CMD_EN BIT(0)
135#define TS_VFP_EN BIT(5)
136
137#define DSI_SHADOW_DEBUG 0x190U
138#define FORCE_COMMIT BIT(0)
139#define BYPASS_SHADOW BIT(1)
140
141#define CONFIG (0xff << 0)
142#define SHORT_PACKET 0
143#define LONG_PACKET 2
144#define BTA BIT(2)
145#define DATA_ID (0xff << 8)
146#define DATA_0 (0xff << 16)
147#define DATA_1 (0xff << 24)
148
149#define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0))
150
151#define MTK_DSI_HOST_IS_READ(type) \
152 ((type == MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM) || \
153 (type == MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM) || \
154 (type == MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM) || \
155 (type == MIPI_DSI_DCS_READ))
156
157struct mtk_phy_timing {
158 u32 lpx;
159 u32 da_hs_prepare;
160 u32 da_hs_zero;
161 u32 da_hs_trail;
162
163 u32 ta_go;
164 u32 ta_sure;
165 u32 ta_get;
166 u32 da_hs_exit;
167
168 u32 clk_hs_zero;
169 u32 clk_hs_trail;
170
171 u32 clk_hs_prepare;
172 u32 clk_hs_post;
173 u32 clk_hs_exit;
174};
175
176struct phy;
177
178struct mtk_dsi_driver_data {
179 const u32 reg_cmdq_off;
180 bool has_shadow_ctl;
181 bool has_size_ctl;
182 bool cmdq_long_packet_ctl;
183};
184
185struct mtk_dsi {
186 struct device *dev;
187 struct mipi_dsi_host host;
188 struct drm_encoder encoder;
189 struct drm_bridge bridge;
190 struct drm_bridge *next_bridge;
191 struct drm_connector *connector;
192 struct phy *phy;
193
194 void __iomem *regs;
195
196 struct clk *engine_clk;
197 struct clk *digital_clk;
198 struct clk *hs_clk;
199
200 u32 data_rate;
201
202 unsigned long mode_flags;
203 enum mipi_dsi_pixel_format format;
204 unsigned int lanes;
205 struct videomode vm;
206 struct mtk_phy_timing phy_timing;
207 int refcount;
208 bool enabled;
209 bool lanes_ready;
210 u32 irq_data;
211 wait_queue_head_t irq_wait_queue;
212 const struct mtk_dsi_driver_data *driver_data;
213};
214
215static inline struct mtk_dsi *bridge_to_dsi(struct drm_bridge *b)
216{
217 return container_of(b, struct mtk_dsi, bridge);
218}
219
220static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h)
221{
222 return container_of(h, struct mtk_dsi, host);
223}
224
225static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
226{
227 u32 temp = readl(dsi->regs + offset);
228
229 writel((temp & ~mask) | (data & mask), dsi->regs + offset);
230}
231
232static void mtk_dsi_phy_timconfig(struct mtk_dsi *dsi)
233{
234 u32 timcon0, timcon1, timcon2, timcon3;
235 u32 data_rate_mhz = DIV_ROUND_UP(dsi->data_rate, 1000000);
236 struct mtk_phy_timing *timing = &dsi->phy_timing;
237
238 timing->lpx = (60 * data_rate_mhz / (8 * 1000)) + 1;
239 timing->da_hs_prepare = (80 * data_rate_mhz + 4 * 1000) / 8000;
240 timing->da_hs_zero = (170 * data_rate_mhz + 10 * 1000) / 8000 + 1 -
241 timing->da_hs_prepare;
242 timing->da_hs_trail = timing->da_hs_prepare + 1;
243
244 timing->ta_go = 4 * timing->lpx - 2;
245 timing->ta_sure = timing->lpx + 2;
246 timing->ta_get = 4 * timing->lpx;
247 timing->da_hs_exit = 2 * timing->lpx + 1;
248
249 timing->clk_hs_prepare = 70 * data_rate_mhz / (8 * 1000);
250 timing->clk_hs_post = timing->clk_hs_prepare + 8;
251 timing->clk_hs_trail = timing->clk_hs_prepare;
252 timing->clk_hs_zero = timing->clk_hs_trail * 4;
253 timing->clk_hs_exit = 2 * timing->clk_hs_trail;
254
255 timcon0 = timing->lpx | timing->da_hs_prepare << 8 |
256 timing->da_hs_zero << 16 | timing->da_hs_trail << 24;
257 timcon1 = timing->ta_go | timing->ta_sure << 8 |
258 timing->ta_get << 16 | timing->da_hs_exit << 24;
259 timcon2 = 1 << 8 | timing->clk_hs_zero << 16 |
260 timing->clk_hs_trail << 24;
261 timcon3 = timing->clk_hs_prepare | timing->clk_hs_post << 8 |
262 timing->clk_hs_exit << 16;
263
264 writel(timcon0, dsi->regs + DSI_PHY_TIMECON0);
265 writel(timcon1, dsi->regs + DSI_PHY_TIMECON1);
266 writel(timcon2, dsi->regs + DSI_PHY_TIMECON2);
267 writel(timcon3, dsi->regs + DSI_PHY_TIMECON3);
268}
269
270static void mtk_dsi_enable(struct mtk_dsi *dsi)
271{
272 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN);
273}
274
275static void mtk_dsi_disable(struct mtk_dsi *dsi)
276{
277 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0);
278}
279
280static void mtk_dsi_reset_engine(struct mtk_dsi *dsi)
281{
282 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET);
283 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0);
284}
285
286static void mtk_dsi_reset_dphy(struct mtk_dsi *dsi)
287{
288 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, DPHY_RESET);
289 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, 0);
290}
291
292static void mtk_dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi)
293{
294 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
295 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
296}
297
298static void mtk_dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi)
299{
300 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
301 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN);
302 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0);
303}
304
305static void mtk_dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi)
306{
307 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0);
308 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
309}
310
311static void mtk_dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi)
312{
313 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
314 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN);
315 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0);
316}
317
318static bool mtk_dsi_clk_hs_state(struct mtk_dsi *dsi)
319{
320 return readl(dsi->regs + DSI_PHY_LCCON) & LC_HS_TX_EN;
321}
322
323static void mtk_dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter)
324{
325 if (enter && !mtk_dsi_clk_hs_state(dsi))
326 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN);
327 else if (!enter && mtk_dsi_clk_hs_state(dsi))
328 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
329}
330
331static void mtk_dsi_set_mode(struct mtk_dsi *dsi)
332{
333 u32 vid_mode = CMD_MODE;
334
335 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
336 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
337 vid_mode = BURST_MODE;
338 else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
339 vid_mode = SYNC_PULSE_MODE;
340 else
341 vid_mode = SYNC_EVENT_MODE;
342 }
343
344 writel(vid_mode, dsi->regs + DSI_MODE_CTRL);
345}
346
347static void mtk_dsi_set_vm_cmd(struct mtk_dsi *dsi)
348{
349 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, VM_CMD_EN, VM_CMD_EN);
350 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, TS_VFP_EN, TS_VFP_EN);
351}
352
353static void mtk_dsi_ps_control_vact(struct mtk_dsi *dsi)
354{
355 struct videomode *vm = &dsi->vm;
356 u32 dsi_buf_bpp, ps_wc;
357 u32 ps_bpp_mode;
358
359 if (dsi->format == MIPI_DSI_FMT_RGB565)
360 dsi_buf_bpp = 2;
361 else
362 dsi_buf_bpp = 3;
363
364 ps_wc = vm->hactive * dsi_buf_bpp;
365 ps_bpp_mode = ps_wc;
366
367 switch (dsi->format) {
368 case MIPI_DSI_FMT_RGB888:
369 ps_bpp_mode |= PACKED_PS_24BIT_RGB888;
370 break;
371 case MIPI_DSI_FMT_RGB666:
372 ps_bpp_mode |= PACKED_PS_18BIT_RGB666;
373 break;
374 case MIPI_DSI_FMT_RGB666_PACKED:
375 ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666;
376 break;
377 case MIPI_DSI_FMT_RGB565:
378 ps_bpp_mode |= PACKED_PS_16BIT_RGB565;
379 break;
380 }
381
382 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
383 writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL);
384 writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC);
385}
386
387static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi)
388{
389 u32 tmp_reg;
390
391 switch (dsi->lanes) {
392 case 1:
393 tmp_reg = 1 << 2;
394 break;
395 case 2:
396 tmp_reg = 3 << 2;
397 break;
398 case 3:
399 tmp_reg = 7 << 2;
400 break;
401 case 4:
402 tmp_reg = 0xf << 2;
403 break;
404 default:
405 tmp_reg = 0xf << 2;
406 break;
407 }
408
409 if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
410 tmp_reg |= HSTX_CKLP_EN;
411
412 if (dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)
413 tmp_reg |= DIS_EOT;
414
415 writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
416}
417
418static void mtk_dsi_ps_control(struct mtk_dsi *dsi)
419{
420 u32 dsi_tmp_buf_bpp;
421 u32 tmp_reg;
422
423 switch (dsi->format) {
424 case MIPI_DSI_FMT_RGB888:
425 tmp_reg = PACKED_PS_24BIT_RGB888;
426 dsi_tmp_buf_bpp = 3;
427 break;
428 case MIPI_DSI_FMT_RGB666:
429 tmp_reg = LOOSELY_PS_18BIT_RGB666;
430 dsi_tmp_buf_bpp = 3;
431 break;
432 case MIPI_DSI_FMT_RGB666_PACKED:
433 tmp_reg = PACKED_PS_18BIT_RGB666;
434 dsi_tmp_buf_bpp = 3;
435 break;
436 case MIPI_DSI_FMT_RGB565:
437 tmp_reg = PACKED_PS_16BIT_RGB565;
438 dsi_tmp_buf_bpp = 2;
439 break;
440 default:
441 tmp_reg = PACKED_PS_24BIT_RGB888;
442 dsi_tmp_buf_bpp = 3;
443 break;
444 }
445
446 tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC;
447 writel(tmp_reg, dsi->regs + DSI_PSCTRL);
448}
449
450static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
451{
452 u32 horizontal_sync_active_byte;
453 u32 horizontal_backporch_byte;
454 u32 horizontal_frontporch_byte;
455 u32 horizontal_front_back_byte;
456 u32 data_phy_cycles_byte;
457 u32 dsi_tmp_buf_bpp, data_phy_cycles;
458 u32 delta;
459 struct mtk_phy_timing *timing = &dsi->phy_timing;
460
461 struct videomode *vm = &dsi->vm;
462
463 if (dsi->format == MIPI_DSI_FMT_RGB565)
464 dsi_tmp_buf_bpp = 2;
465 else
466 dsi_tmp_buf_bpp = 3;
467
468 writel(vm->vsync_len, dsi->regs + DSI_VSA_NL);
469 writel(vm->vback_porch, dsi->regs + DSI_VBP_NL);
470 writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL);
471 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
472
473 if (dsi->driver_data->has_size_ctl)
474 writel(vm->vactive << 16 | vm->hactive,
475 dsi->regs + DSI_SIZE_CON);
476
477 horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
478
479 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
480 horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp - 10;
481 else
482 horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *
483 dsi_tmp_buf_bpp - 10;
484
485 data_phy_cycles = timing->lpx + timing->da_hs_prepare +
486 timing->da_hs_zero + timing->da_hs_exit + 3;
487
488 delta = dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST ? 18 : 12;
489 delta += dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET ? 0 : 2;
490
491 horizontal_frontporch_byte = vm->hfront_porch * dsi_tmp_buf_bpp;
492 horizontal_front_back_byte = horizontal_frontporch_byte + horizontal_backporch_byte;
493 data_phy_cycles_byte = data_phy_cycles * dsi->lanes + delta;
494
495 if (horizontal_front_back_byte > data_phy_cycles_byte) {
496 horizontal_frontporch_byte -= data_phy_cycles_byte *
497 horizontal_frontporch_byte /
498 horizontal_front_back_byte;
499
500 horizontal_backporch_byte -= data_phy_cycles_byte *
501 horizontal_backporch_byte /
502 horizontal_front_back_byte;
503 } else {
504 DRM_WARN("HFP + HBP less than d-phy, FPS will under 60Hz\n");
505 }
506
507 if ((dsi->mode_flags & MIPI_DSI_HS_PKT_END_ALIGNED) &&
508 (dsi->lanes == 4)) {
509 horizontal_sync_active_byte =
510 roundup(horizontal_sync_active_byte, dsi->lanes) - 2;
511 horizontal_frontporch_byte =
512 roundup(horizontal_frontporch_byte, dsi->lanes) - 2;
513 horizontal_backporch_byte =
514 roundup(horizontal_backporch_byte, dsi->lanes) - 2;
515 horizontal_backporch_byte -=
516 (vm->hactive * dsi_tmp_buf_bpp + 2) % dsi->lanes;
517 }
518
519 writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
520 writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
521 writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
522
523 mtk_dsi_ps_control(dsi);
524}
525
526static void mtk_dsi_start(struct mtk_dsi *dsi)
527{
528 writel(0, dsi->regs + DSI_START);
529 writel(1, dsi->regs + DSI_START);
530}
531
532static void mtk_dsi_stop(struct mtk_dsi *dsi)
533{
534 writel(0, dsi->regs + DSI_START);
535}
536
537static void mtk_dsi_set_cmd_mode(struct mtk_dsi *dsi)
538{
539 writel(CMD_MODE, dsi->regs + DSI_MODE_CTRL);
540}
541
542static void mtk_dsi_set_interrupt_enable(struct mtk_dsi *dsi)
543{
544 u32 inten = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
545
546 writel(inten, dsi->regs + DSI_INTEN);
547}
548
549static void mtk_dsi_irq_data_set(struct mtk_dsi *dsi, u32 irq_bit)
550{
551 dsi->irq_data |= irq_bit;
552}
553
554static void mtk_dsi_irq_data_clear(struct mtk_dsi *dsi, u32 irq_bit)
555{
556 dsi->irq_data &= ~irq_bit;
557}
558
559static s32 mtk_dsi_wait_for_irq_done(struct mtk_dsi *dsi, u32 irq_flag,
560 unsigned int timeout)
561{
562 s32 ret = 0;
563 unsigned long jiffies = msecs_to_jiffies(timeout);
564
565 ret = wait_event_interruptible_timeout(dsi->irq_wait_queue,
566 dsi->irq_data & irq_flag,
567 jiffies);
568 if (ret == 0) {
569 DRM_WARN("Wait DSI IRQ(0x%08x) Timeout\n", irq_flag);
570
571 mtk_dsi_enable(dsi);
572 mtk_dsi_reset_engine(dsi);
573 }
574
575 return ret;
576}
577
578static irqreturn_t mtk_dsi_irq(int irq, void *dev_id)
579{
580 struct mtk_dsi *dsi = dev_id;
581 u32 status, tmp;
582 u32 flag = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
583
584 status = readl(dsi->regs + DSI_INTSTA) & flag;
585
586 if (status) {
587 do {
588 mtk_dsi_mask(dsi, DSI_RACK, RACK, RACK);
589 tmp = readl(dsi->regs + DSI_INTSTA);
590 } while (tmp & DSI_BUSY);
591
592 mtk_dsi_mask(dsi, DSI_INTSTA, status, 0);
593 mtk_dsi_irq_data_set(dsi, status);
594 wake_up_interruptible(&dsi->irq_wait_queue);
595 }
596
597 return IRQ_HANDLED;
598}
599
600static s32 mtk_dsi_switch_to_cmd_mode(struct mtk_dsi *dsi, u8 irq_flag, u32 t)
601{
602 mtk_dsi_irq_data_clear(dsi, irq_flag);
603 mtk_dsi_set_cmd_mode(dsi);
604
605 if (!mtk_dsi_wait_for_irq_done(dsi, irq_flag, t)) {
606 DRM_ERROR("failed to switch cmd mode\n");
607 return -ETIME;
608 } else {
609 return 0;
610 }
611}
612
613static int mtk_dsi_poweron(struct mtk_dsi *dsi)
614{
615 struct device *dev = dsi->host.dev;
616 int ret;
617 u32 bit_per_pixel;
618
619 if (++dsi->refcount != 1)
620 return 0;
621
622 switch (dsi->format) {
623 case MIPI_DSI_FMT_RGB565:
624 bit_per_pixel = 16;
625 break;
626 case MIPI_DSI_FMT_RGB666_PACKED:
627 bit_per_pixel = 18;
628 break;
629 case MIPI_DSI_FMT_RGB666:
630 case MIPI_DSI_FMT_RGB888:
631 default:
632 bit_per_pixel = 24;
633 break;
634 }
635
636 dsi->data_rate = DIV_ROUND_UP_ULL(dsi->vm.pixelclock * bit_per_pixel,
637 dsi->lanes);
638
639 ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
640 if (ret < 0) {
641 dev_err(dev, "Failed to set data rate: %d\n", ret);
642 goto err_refcount;
643 }
644
645 phy_power_on(dsi->phy);
646
647 ret = clk_prepare_enable(dsi->engine_clk);
648 if (ret < 0) {
649 dev_err(dev, "Failed to enable engine clock: %d\n", ret);
650 goto err_phy_power_off;
651 }
652
653 ret = clk_prepare_enable(dsi->digital_clk);
654 if (ret < 0) {
655 dev_err(dev, "Failed to enable digital clock: %d\n", ret);
656 goto err_disable_engine_clk;
657 }
658
659 mtk_dsi_enable(dsi);
660
661 if (dsi->driver_data->has_shadow_ctl)
662 writel(FORCE_COMMIT | BYPASS_SHADOW,
663 dsi->regs + DSI_SHADOW_DEBUG);
664
665 mtk_dsi_reset_engine(dsi);
666 mtk_dsi_phy_timconfig(dsi);
667
668 mtk_dsi_ps_control_vact(dsi);
669 mtk_dsi_set_vm_cmd(dsi);
670 mtk_dsi_config_vdo_timing(dsi);
671 mtk_dsi_set_interrupt_enable(dsi);
672
673 return 0;
674err_disable_engine_clk:
675 clk_disable_unprepare(dsi->engine_clk);
676err_phy_power_off:
677 phy_power_off(dsi->phy);
678err_refcount:
679 dsi->refcount--;
680 return ret;
681}
682
683static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
684{
685 if (WARN_ON(dsi->refcount == 0))
686 return;
687
688 if (--dsi->refcount != 0)
689 return;
690
691 /*
692 * mtk_dsi_stop() and mtk_dsi_start() is asymmetric, since
693 * mtk_dsi_stop() should be called after mtk_drm_crtc_atomic_disable(),
694 * which needs irq for vblank, and mtk_dsi_stop() will disable irq.
695 * mtk_dsi_start() needs to be called in mtk_output_dsi_enable(),
696 * after dsi is fully set.
697 */
698 mtk_dsi_stop(dsi);
699
700 mtk_dsi_switch_to_cmd_mode(dsi, VM_DONE_INT_FLAG, 500);
701 mtk_dsi_reset_engine(dsi);
702 mtk_dsi_lane0_ulp_mode_enter(dsi);
703 mtk_dsi_clk_ulp_mode_enter(dsi);
704 /* set the lane number as 0 to pull down mipi */
705 writel(0, dsi->regs + DSI_TXRX_CTRL);
706
707 mtk_dsi_disable(dsi);
708
709 clk_disable_unprepare(dsi->engine_clk);
710 clk_disable_unprepare(dsi->digital_clk);
711
712 phy_power_off(dsi->phy);
713
714 dsi->lanes_ready = false;
715}
716
717static void mtk_dsi_lane_ready(struct mtk_dsi *dsi)
718{
719 if (!dsi->lanes_ready) {
720 dsi->lanes_ready = true;
721 mtk_dsi_rxtx_control(dsi);
722 usleep_range(30, 100);
723 mtk_dsi_reset_dphy(dsi);
724 mtk_dsi_clk_ulp_mode_leave(dsi);
725 mtk_dsi_lane0_ulp_mode_leave(dsi);
726 mtk_dsi_clk_hs_mode(dsi, 0);
727 usleep_range(1000, 3000);
728 /* The reaction time after pulling up the mipi signal for dsi_rx */
729 }
730}
731
732static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
733{
734 if (dsi->enabled)
735 return;
736
737 mtk_dsi_lane_ready(dsi);
738 mtk_dsi_set_mode(dsi);
739 mtk_dsi_clk_hs_mode(dsi, 1);
740
741 mtk_dsi_start(dsi);
742
743 dsi->enabled = true;
744}
745
746static void mtk_output_dsi_disable(struct mtk_dsi *dsi)
747{
748 if (!dsi->enabled)
749 return;
750
751 dsi->enabled = false;
752}
753
754static int mtk_dsi_bridge_attach(struct drm_bridge *bridge,
755 enum drm_bridge_attach_flags flags)
756{
757 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
758
759 /* Attach the panel or bridge to the dsi bridge */
760 return drm_bridge_attach(bridge->encoder, dsi->next_bridge,
761 &dsi->bridge, flags);
762}
763
764static void mtk_dsi_bridge_mode_set(struct drm_bridge *bridge,
765 const struct drm_display_mode *mode,
766 const struct drm_display_mode *adjusted)
767{
768 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
769
770 drm_display_mode_to_videomode(adjusted, &dsi->vm);
771}
772
773static void mtk_dsi_bridge_atomic_disable(struct drm_bridge *bridge,
774 struct drm_bridge_state *old_bridge_state)
775{
776 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
777
778 mtk_output_dsi_disable(dsi);
779}
780
781static void mtk_dsi_bridge_atomic_enable(struct drm_bridge *bridge,
782 struct drm_bridge_state *old_bridge_state)
783{
784 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
785
786 if (dsi->refcount == 0)
787 return;
788
789 mtk_output_dsi_enable(dsi);
790}
791
792static void mtk_dsi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
793 struct drm_bridge_state *old_bridge_state)
794{
795 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
796 int ret;
797
798 ret = mtk_dsi_poweron(dsi);
799 if (ret < 0)
800 DRM_ERROR("failed to power on dsi\n");
801}
802
803static void mtk_dsi_bridge_atomic_post_disable(struct drm_bridge *bridge,
804 struct drm_bridge_state *old_bridge_state)
805{
806 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
807
808 mtk_dsi_poweroff(dsi);
809}
810
811static enum drm_mode_status
812mtk_dsi_bridge_mode_valid(struct drm_bridge *bridge,
813 const struct drm_display_info *info,
814 const struct drm_display_mode *mode)
815{
816 struct mtk_dsi *dsi = bridge_to_dsi(bridge);
817 u32 bpp;
818
819 if (dsi->format == MIPI_DSI_FMT_RGB565)
820 bpp = 16;
821 else
822 bpp = 24;
823
824 if (mode->clock * bpp / dsi->lanes > 1500000)
825 return MODE_CLOCK_HIGH;
826
827 return MODE_OK;
828}
829
830static const struct drm_bridge_funcs mtk_dsi_bridge_funcs = {
831 .attach = mtk_dsi_bridge_attach,
832 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
833 .atomic_disable = mtk_dsi_bridge_atomic_disable,
834 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
835 .atomic_enable = mtk_dsi_bridge_atomic_enable,
836 .atomic_pre_enable = mtk_dsi_bridge_atomic_pre_enable,
837 .atomic_post_disable = mtk_dsi_bridge_atomic_post_disable,
838 .atomic_reset = drm_atomic_helper_bridge_reset,
839 .mode_valid = mtk_dsi_bridge_mode_valid,
840 .mode_set = mtk_dsi_bridge_mode_set,
841};
842
843void mtk_dsi_ddp_start(struct device *dev)
844{
845 struct mtk_dsi *dsi = dev_get_drvdata(dev);
846
847 mtk_dsi_poweron(dsi);
848}
849
850void mtk_dsi_ddp_stop(struct device *dev)
851{
852 struct mtk_dsi *dsi = dev_get_drvdata(dev);
853
854 mtk_dsi_poweroff(dsi);
855}
856
857static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
858{
859 int ret;
860
861 ret = drm_simple_encoder_init(drm, &dsi->encoder,
862 DRM_MODE_ENCODER_DSI);
863 if (ret) {
864 DRM_ERROR("Failed to encoder init to drm\n");
865 return ret;
866 }
867
868 dsi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm, dsi->host.dev);
869
870 ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL,
871 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
872 if (ret)
873 goto err_cleanup_encoder;
874
875 dsi->connector = drm_bridge_connector_init(drm, &dsi->encoder);
876 if (IS_ERR(dsi->connector)) {
877 DRM_ERROR("Unable to create bridge connector\n");
878 ret = PTR_ERR(dsi->connector);
879 goto err_cleanup_encoder;
880 }
881 drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
882
883 return 0;
884
885err_cleanup_encoder:
886 drm_encoder_cleanup(&dsi->encoder);
887 return ret;
888}
889
890unsigned int mtk_dsi_encoder_index(struct device *dev)
891{
892 struct mtk_dsi *dsi = dev_get_drvdata(dev);
893 unsigned int encoder_index = drm_encoder_index(&dsi->encoder);
894
895 dev_dbg(dev, "encoder index:%d\n", encoder_index);
896 return encoder_index;
897}
898
899static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
900{
901 int ret;
902 struct drm_device *drm = data;
903 struct mtk_dsi *dsi = dev_get_drvdata(dev);
904
905 ret = mtk_dsi_encoder_init(drm, dsi);
906 if (ret)
907 return ret;
908
909 return device_reset_optional(dev);
910}
911
912static void mtk_dsi_unbind(struct device *dev, struct device *master,
913 void *data)
914{
915 struct mtk_dsi *dsi = dev_get_drvdata(dev);
916
917 drm_encoder_cleanup(&dsi->encoder);
918}
919
920static const struct component_ops mtk_dsi_component_ops = {
921 .bind = mtk_dsi_bind,
922 .unbind = mtk_dsi_unbind,
923};
924
925static int mtk_dsi_host_attach(struct mipi_dsi_host *host,
926 struct mipi_dsi_device *device)
927{
928 struct mtk_dsi *dsi = host_to_dsi(host);
929 struct device *dev = host->dev;
930 int ret;
931
932 dsi->lanes = device->lanes;
933 dsi->format = device->format;
934 dsi->mode_flags = device->mode_flags;
935 dsi->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);
936 if (IS_ERR(dsi->next_bridge))
937 return PTR_ERR(dsi->next_bridge);
938
939 drm_bridge_add(&dsi->bridge);
940
941 ret = component_add(host->dev, &mtk_dsi_component_ops);
942 if (ret) {
943 DRM_ERROR("failed to add dsi_host component: %d\n", ret);
944 drm_bridge_remove(&dsi->bridge);
945 return ret;
946 }
947
948 return 0;
949}
950
951static int mtk_dsi_host_detach(struct mipi_dsi_host *host,
952 struct mipi_dsi_device *device)
953{
954 struct mtk_dsi *dsi = host_to_dsi(host);
955
956 component_del(host->dev, &mtk_dsi_component_ops);
957 drm_bridge_remove(&dsi->bridge);
958 return 0;
959}
960
961static void mtk_dsi_wait_for_idle(struct mtk_dsi *dsi)
962{
963 int ret;
964 u32 val;
965
966 ret = readl_poll_timeout(dsi->regs + DSI_INTSTA, val, !(val & DSI_BUSY),
967 4, 2000000);
968 if (ret) {
969 DRM_WARN("polling dsi wait not busy timeout!\n");
970
971 mtk_dsi_enable(dsi);
972 mtk_dsi_reset_engine(dsi);
973 }
974}
975
976static u32 mtk_dsi_recv_cnt(u8 type, u8 *read_data)
977{
978 switch (type) {
979 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
980 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
981 return 1;
982 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
983 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
984 return 2;
985 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
986 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
987 return read_data[1] + read_data[2] * 16;
988 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
989 DRM_INFO("type is 0x02, try again\n");
990 break;
991 default:
992 DRM_INFO("type(0x%x) not recognized\n", type);
993 break;
994 }
995
996 return 0;
997}
998
999static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)
1000{
1001 const char *tx_buf = msg->tx_buf;
1002 u8 config, cmdq_size, cmdq_off, type = msg->type;
1003 u32 reg_val, cmdq_mask, i;
1004 u32 reg_cmdq_off = dsi->driver_data->reg_cmdq_off;
1005
1006 if (MTK_DSI_HOST_IS_READ(type))
1007 config = BTA;
1008 else
1009 config = (msg->tx_len > 2) ? LONG_PACKET : SHORT_PACKET;
1010
1011 if (msg->tx_len > 2) {
1012 cmdq_size = 1 + (msg->tx_len + 3) / 4;
1013 cmdq_off = 4;
1014 cmdq_mask = CONFIG | DATA_ID | DATA_0 | DATA_1;
1015 reg_val = (msg->tx_len << 16) | (type << 8) | config;
1016 } else {
1017 cmdq_size = 1;
1018 cmdq_off = 2;
1019 cmdq_mask = CONFIG | DATA_ID;
1020 reg_val = (type << 8) | config;
1021 }
1022
1023 for (i = 0; i < msg->tx_len; i++)
1024 mtk_dsi_mask(dsi, (reg_cmdq_off + cmdq_off + i) & (~0x3U),
1025 (0xffUL << (((i + cmdq_off) & 3U) * 8U)),
1026 tx_buf[i] << (((i + cmdq_off) & 3U) * 8U));
1027
1028 mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
1029 mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
1030 if (dsi->driver_data->cmdq_long_packet_ctl) {
1031 /* Disable setting cmdq_size automatically for long packets */
1032 mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL);
1033 }
1034}
1035
1036static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
1037 const struct mipi_dsi_msg *msg, u8 flag)
1038{
1039 mtk_dsi_wait_for_idle(dsi);
1040 mtk_dsi_irq_data_clear(dsi, flag);
1041 mtk_dsi_cmdq(dsi, msg);
1042 mtk_dsi_start(dsi);
1043
1044 if (!mtk_dsi_wait_for_irq_done(dsi, flag, 2000))
1045 return -ETIME;
1046 else
1047 return 0;
1048}
1049
1050static ssize_t mtk_dsi_host_transfer(struct mipi_dsi_host *host,
1051 const struct mipi_dsi_msg *msg)
1052{
1053 struct mtk_dsi *dsi = host_to_dsi(host);
1054 u32 recv_cnt, i;
1055 u8 read_data[16];
1056 void *src_addr;
1057 u8 irq_flag = CMD_DONE_INT_FLAG;
1058 u32 dsi_mode;
1059 int ret;
1060
1061 dsi_mode = readl(dsi->regs + DSI_MODE_CTRL);
1062 if (dsi_mode & MODE) {
1063 mtk_dsi_stop(dsi);
1064 ret = mtk_dsi_switch_to_cmd_mode(dsi, VM_DONE_INT_FLAG, 500);
1065 if (ret)
1066 goto restore_dsi_mode;
1067 }
1068
1069 if (MTK_DSI_HOST_IS_READ(msg->type))
1070 irq_flag |= LPRX_RD_RDY_INT_FLAG;
1071
1072 mtk_dsi_lane_ready(dsi);
1073
1074 ret = mtk_dsi_host_send_cmd(dsi, msg, irq_flag);
1075 if (ret)
1076 goto restore_dsi_mode;
1077
1078 if (!MTK_DSI_HOST_IS_READ(msg->type)) {
1079 recv_cnt = 0;
1080 goto restore_dsi_mode;
1081 }
1082
1083 if (!msg->rx_buf) {
1084 DRM_ERROR("dsi receive buffer size may be NULL\n");
1085 ret = -EINVAL;
1086 goto restore_dsi_mode;
1087 }
1088
1089 for (i = 0; i < 16; i++)
1090 *(read_data + i) = readb(dsi->regs + DSI_RX_DATA0 + i);
1091
1092 recv_cnt = mtk_dsi_recv_cnt(read_data[0], read_data);
1093
1094 if (recv_cnt > 2)
1095 src_addr = &read_data[4];
1096 else
1097 src_addr = &read_data[1];
1098
1099 if (recv_cnt > 10)
1100 recv_cnt = 10;
1101
1102 if (recv_cnt > msg->rx_len)
1103 recv_cnt = msg->rx_len;
1104
1105 if (recv_cnt)
1106 memcpy(msg->rx_buf, src_addr, recv_cnt);
1107
1108 DRM_INFO("dsi get %d byte data from the panel address(0x%x)\n",
1109 recv_cnt, *((u8 *)(msg->tx_buf)));
1110
1111restore_dsi_mode:
1112 if (dsi_mode & MODE) {
1113 mtk_dsi_set_mode(dsi);
1114 mtk_dsi_start(dsi);
1115 }
1116
1117 return ret < 0 ? ret : recv_cnt;
1118}
1119
1120static const struct mipi_dsi_host_ops mtk_dsi_ops = {
1121 .attach = mtk_dsi_host_attach,
1122 .detach = mtk_dsi_host_detach,
1123 .transfer = mtk_dsi_host_transfer,
1124};
1125
1126static int mtk_dsi_probe(struct platform_device *pdev)
1127{
1128 struct mtk_dsi *dsi;
1129 struct device *dev = &pdev->dev;
1130 struct resource *regs;
1131 int irq_num;
1132 int ret;
1133
1134 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
1135 if (!dsi)
1136 return -ENOMEM;
1137
1138 dsi->host.ops = &mtk_dsi_ops;
1139 dsi->host.dev = dev;
1140 ret = mipi_dsi_host_register(&dsi->host);
1141 if (ret < 0) {
1142 dev_err(dev, "failed to register DSI host: %d\n", ret);
1143 return ret;
1144 }
1145
1146 dsi->driver_data = of_device_get_match_data(dev);
1147
1148 dsi->engine_clk = devm_clk_get(dev, "engine");
1149 if (IS_ERR(dsi->engine_clk)) {
1150 ret = PTR_ERR(dsi->engine_clk);
1151
1152 if (ret != -EPROBE_DEFER)
1153 dev_err(dev, "Failed to get engine clock: %d\n", ret);
1154 goto err_unregister_host;
1155 }
1156
1157 dsi->digital_clk = devm_clk_get(dev, "digital");
1158 if (IS_ERR(dsi->digital_clk)) {
1159 ret = PTR_ERR(dsi->digital_clk);
1160
1161 if (ret != -EPROBE_DEFER)
1162 dev_err(dev, "Failed to get digital clock: %d\n", ret);
1163 goto err_unregister_host;
1164 }
1165
1166 dsi->hs_clk = devm_clk_get(dev, "hs");
1167 if (IS_ERR(dsi->hs_clk)) {
1168 ret = PTR_ERR(dsi->hs_clk);
1169 dev_err(dev, "Failed to get hs clock: %d\n", ret);
1170 goto err_unregister_host;
1171 }
1172
1173 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1174 dsi->regs = devm_ioremap_resource(dev, regs);
1175 if (IS_ERR(dsi->regs)) {
1176 ret = PTR_ERR(dsi->regs);
1177 dev_err(dev, "Failed to ioremap memory: %d\n", ret);
1178 goto err_unregister_host;
1179 }
1180
1181 dsi->phy = devm_phy_get(dev, "dphy");
1182 if (IS_ERR(dsi->phy)) {
1183 ret = PTR_ERR(dsi->phy);
1184 dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret);
1185 goto err_unregister_host;
1186 }
1187
1188 irq_num = platform_get_irq(pdev, 0);
1189 if (irq_num < 0) {
1190 ret = irq_num;
1191 goto err_unregister_host;
1192 }
1193
1194 ret = devm_request_irq(&pdev->dev, irq_num, mtk_dsi_irq,
1195 IRQF_TRIGGER_NONE, dev_name(&pdev->dev), dsi);
1196 if (ret) {
1197 dev_err(&pdev->dev, "failed to request mediatek dsi irq\n");
1198 goto err_unregister_host;
1199 }
1200
1201 init_waitqueue_head(&dsi->irq_wait_queue);
1202
1203 platform_set_drvdata(pdev, dsi);
1204
1205 dsi->bridge.funcs = &mtk_dsi_bridge_funcs;
1206 dsi->bridge.of_node = dev->of_node;
1207 dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
1208
1209 return 0;
1210
1211err_unregister_host:
1212 mipi_dsi_host_unregister(&dsi->host);
1213 return ret;
1214}
1215
1216static void mtk_dsi_remove(struct platform_device *pdev)
1217{
1218 struct mtk_dsi *dsi = platform_get_drvdata(pdev);
1219
1220 mtk_output_dsi_disable(dsi);
1221 mipi_dsi_host_unregister(&dsi->host);
1222}
1223
1224static const struct mtk_dsi_driver_data mt8173_dsi_driver_data = {
1225 .reg_cmdq_off = 0x200,
1226};
1227
1228static const struct mtk_dsi_driver_data mt2701_dsi_driver_data = {
1229 .reg_cmdq_off = 0x180,
1230};
1231
1232static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {
1233 .reg_cmdq_off = 0x200,
1234 .has_shadow_ctl = true,
1235 .has_size_ctl = true,
1236};
1237
1238static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
1239 .reg_cmdq_off = 0xd00,
1240 .has_shadow_ctl = true,
1241 .has_size_ctl = true,
1242};
1243
1244static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
1245 .reg_cmdq_off = 0xd00,
1246 .has_shadow_ctl = true,
1247 .has_size_ctl = true,
1248 .cmdq_long_packet_ctl = true,
1249};
1250
1251static const struct of_device_id mtk_dsi_of_match[] = {
1252 { .compatible = "mediatek,mt2701-dsi",
1253 .data = &mt2701_dsi_driver_data },
1254 { .compatible = "mediatek,mt8173-dsi",
1255 .data = &mt8173_dsi_driver_data },
1256 { .compatible = "mediatek,mt8183-dsi",
1257 .data = &mt8183_dsi_driver_data },
1258 { .compatible = "mediatek,mt8186-dsi",
1259 .data = &mt8186_dsi_driver_data },
1260 { .compatible = "mediatek,mt8188-dsi",
1261 .data = &mt8188_dsi_driver_data },
1262 { },
1263};
1264MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);
1265
1266struct platform_driver mtk_dsi_driver = {
1267 .probe = mtk_dsi_probe,
1268 .remove_new = mtk_dsi_remove,
1269 .driver = {
1270 .name = "mtk-dsi",
1271 .of_match_table = mtk_dsi_of_match,
1272 },
1273};
1/*
2 * Copyright (c) 2015 MediaTek Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include <drm/drmP.h>
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_crtc_helper.h>
17#include <drm/drm_mipi_dsi.h>
18#include <drm/drm_panel.h>
19#include <linux/clk.h>
20#include <linux/component.h>
21#include <linux/of.h>
22#include <linux/of_platform.h>
23#include <linux/of_graph.h>
24#include <linux/phy/phy.h>
25#include <linux/platform_device.h>
26#include <video/videomode.h>
27
28#include "mtk_drm_ddp_comp.h"
29
30#define DSI_VIDEO_FIFO_DEPTH (1920 / 4)
31#define DSI_HOST_FIFO_DEPTH 64
32
33#define DSI_START 0x00
34
35#define DSI_CON_CTRL 0x10
36#define DSI_RESET BIT(0)
37#define DSI_EN BIT(1)
38
39#define DSI_MODE_CTRL 0x14
40#define MODE (3)
41#define CMD_MODE 0
42#define SYNC_PULSE_MODE 1
43#define SYNC_EVENT_MODE 2
44#define BURST_MODE 3
45#define FRM_MODE BIT(16)
46#define MIX_MODE BIT(17)
47
48#define DSI_TXRX_CTRL 0x18
49#define VC_NUM (2 << 0)
50#define LANE_NUM (0xf << 2)
51#define DIS_EOT BIT(6)
52#define NULL_EN BIT(7)
53#define TE_FREERUN BIT(8)
54#define EXT_TE_EN BIT(9)
55#define EXT_TE_EDGE BIT(10)
56#define MAX_RTN_SIZE (0xf << 12)
57#define HSTX_CKLP_EN BIT(16)
58
59#define DSI_PSCTRL 0x1c
60#define DSI_PS_WC 0x3fff
61#define DSI_PS_SEL (3 << 16)
62#define PACKED_PS_16BIT_RGB565 (0 << 16)
63#define LOOSELY_PS_18BIT_RGB666 (1 << 16)
64#define PACKED_PS_18BIT_RGB666 (2 << 16)
65#define PACKED_PS_24BIT_RGB888 (3 << 16)
66
67#define DSI_VSA_NL 0x20
68#define DSI_VBP_NL 0x24
69#define DSI_VFP_NL 0x28
70#define DSI_VACT_NL 0x2C
71#define DSI_HSA_WC 0x50
72#define DSI_HBP_WC 0x54
73#define DSI_HFP_WC 0x58
74
75#define DSI_HSTX_CKL_WC 0x64
76
77#define DSI_PHY_LCCON 0x104
78#define LC_HS_TX_EN BIT(0)
79#define LC_ULPM_EN BIT(1)
80#define LC_WAKEUP_EN BIT(2)
81
82#define DSI_PHY_LD0CON 0x108
83#define LD0_HS_TX_EN BIT(0)
84#define LD0_ULPM_EN BIT(1)
85#define LD0_WAKEUP_EN BIT(2)
86
87#define DSI_PHY_TIMECON0 0x110
88#define LPX (0xff << 0)
89#define HS_PREP (0xff << 8)
90#define HS_ZERO (0xff << 16)
91#define HS_TRAIL (0xff << 24)
92
93#define DSI_PHY_TIMECON1 0x114
94#define TA_GO (0xff << 0)
95#define TA_SURE (0xff << 8)
96#define TA_GET (0xff << 16)
97#define DA_HS_EXIT (0xff << 24)
98
99#define DSI_PHY_TIMECON2 0x118
100#define CONT_DET (0xff << 0)
101#define CLK_ZERO (0xff << 16)
102#define CLK_TRAIL (0xff << 24)
103
104#define DSI_PHY_TIMECON3 0x11c
105#define CLK_HS_PREP (0xff << 0)
106#define CLK_HS_POST (0xff << 8)
107#define CLK_HS_EXIT (0xff << 16)
108
109#define T_LPX 5
110#define T_HS_PREP 6
111#define T_HS_TRAIL 8
112#define T_HS_EXIT 7
113#define T_HS_ZERO 10
114
115#define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0))
116
117struct phy;
118
119struct mtk_dsi {
120 struct mtk_ddp_comp ddp_comp;
121 struct device *dev;
122 struct mipi_dsi_host host;
123 struct drm_encoder encoder;
124 struct drm_connector conn;
125 struct drm_panel *panel;
126 struct drm_bridge *bridge;
127 struct phy *phy;
128
129 void __iomem *regs;
130
131 struct clk *engine_clk;
132 struct clk *digital_clk;
133 struct clk *hs_clk;
134
135 u32 data_rate;
136
137 unsigned long mode_flags;
138 enum mipi_dsi_pixel_format format;
139 unsigned int lanes;
140 struct videomode vm;
141 int refcount;
142 bool enabled;
143};
144
145static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e)
146{
147 return container_of(e, struct mtk_dsi, encoder);
148}
149
150static inline struct mtk_dsi *connector_to_dsi(struct drm_connector *c)
151{
152 return container_of(c, struct mtk_dsi, conn);
153}
154
155static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h)
156{
157 return container_of(h, struct mtk_dsi, host);
158}
159
160static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
161{
162 u32 temp = readl(dsi->regs + offset);
163
164 writel((temp & ~mask) | (data & mask), dsi->regs + offset);
165}
166
167static void dsi_phy_timconfig(struct mtk_dsi *dsi)
168{
169 u32 timcon0, timcon1, timcon2, timcon3;
170 u32 ui, cycle_time;
171
172 ui = 1000 / dsi->data_rate + 0x01;
173 cycle_time = 8000 / dsi->data_rate + 0x01;
174
175 timcon0 = T_LPX | T_HS_PREP << 8 | T_HS_ZERO << 16 | T_HS_TRAIL << 24;
176 timcon1 = 4 * T_LPX | (3 * T_LPX / 2) << 8 | 5 * T_LPX << 16 |
177 T_HS_EXIT << 24;
178 timcon2 = ((NS_TO_CYCLE(0x64, cycle_time) + 0xa) << 24) |
179 (NS_TO_CYCLE(0x150, cycle_time) << 16);
180 timcon3 = NS_TO_CYCLE(0x40, cycle_time) | (2 * T_LPX) << 16 |
181 NS_TO_CYCLE(80 + 52 * ui, cycle_time) << 8;
182
183 writel(timcon0, dsi->regs + DSI_PHY_TIMECON0);
184 writel(timcon1, dsi->regs + DSI_PHY_TIMECON1);
185 writel(timcon2, dsi->regs + DSI_PHY_TIMECON2);
186 writel(timcon3, dsi->regs + DSI_PHY_TIMECON3);
187}
188
189static void mtk_dsi_enable(struct mtk_dsi *dsi)
190{
191 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN);
192}
193
194static void mtk_dsi_disable(struct mtk_dsi *dsi)
195{
196 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0);
197}
198
199static void mtk_dsi_reset(struct mtk_dsi *dsi)
200{
201 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET);
202 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0);
203}
204
205static int mtk_dsi_poweron(struct mtk_dsi *dsi)
206{
207 struct device *dev = dsi->dev;
208 int ret;
209 u64 pixel_clock, total_bits;
210 u32 htotal, htotal_bits, bit_per_pixel, overhead_cycles, overhead_bits;
211
212 if (++dsi->refcount != 1)
213 return 0;
214
215 switch (dsi->format) {
216 case MIPI_DSI_FMT_RGB565:
217 bit_per_pixel = 16;
218 break;
219 case MIPI_DSI_FMT_RGB666_PACKED:
220 bit_per_pixel = 18;
221 break;
222 case MIPI_DSI_FMT_RGB666:
223 case MIPI_DSI_FMT_RGB888:
224 default:
225 bit_per_pixel = 24;
226 break;
227 }
228
229 /**
230 * vm.pixelclock is in kHz, pixel_clock unit is Hz, so multiply by 1000
231 * htotal_time = htotal * byte_per_pixel / num_lanes
232 * overhead_time = lpx + hs_prepare + hs_zero + hs_trail + hs_exit
233 * mipi_ratio = (htotal_time + overhead_time) / htotal_time
234 * data_rate = pixel_clock * bit_per_pixel * mipi_ratio / num_lanes;
235 */
236 pixel_clock = dsi->vm.pixelclock * 1000;
237 htotal = dsi->vm.hactive + dsi->vm.hback_porch + dsi->vm.hfront_porch +
238 dsi->vm.hsync_len;
239 htotal_bits = htotal * bit_per_pixel;
240
241 overhead_cycles = T_LPX + T_HS_PREP + T_HS_ZERO + T_HS_TRAIL +
242 T_HS_EXIT;
243 overhead_bits = overhead_cycles * dsi->lanes * 8;
244 total_bits = htotal_bits + overhead_bits;
245
246 dsi->data_rate = DIV_ROUND_UP_ULL(pixel_clock * total_bits,
247 htotal * dsi->lanes);
248
249 ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
250 if (ret < 0) {
251 dev_err(dev, "Failed to set data rate: %d\n", ret);
252 goto err_refcount;
253 }
254
255 phy_power_on(dsi->phy);
256
257 ret = clk_prepare_enable(dsi->engine_clk);
258 if (ret < 0) {
259 dev_err(dev, "Failed to enable engine clock: %d\n", ret);
260 goto err_phy_power_off;
261 }
262
263 ret = clk_prepare_enable(dsi->digital_clk);
264 if (ret < 0) {
265 dev_err(dev, "Failed to enable digital clock: %d\n", ret);
266 goto err_disable_engine_clk;
267 }
268
269 mtk_dsi_enable(dsi);
270 mtk_dsi_reset(dsi);
271 dsi_phy_timconfig(dsi);
272
273 return 0;
274
275err_disable_engine_clk:
276 clk_disable_unprepare(dsi->engine_clk);
277err_phy_power_off:
278 phy_power_off(dsi->phy);
279err_refcount:
280 dsi->refcount--;
281 return ret;
282}
283
284static void dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi)
285{
286 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
287 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
288}
289
290static void dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi)
291{
292 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
293 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN);
294 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0);
295}
296
297static void dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi)
298{
299 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0);
300 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
301}
302
303static void dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi)
304{
305 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
306 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN);
307 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0);
308}
309
310static bool dsi_clk_hs_state(struct mtk_dsi *dsi)
311{
312 u32 tmp_reg1;
313
314 tmp_reg1 = readl(dsi->regs + DSI_PHY_LCCON);
315 return ((tmp_reg1 & LC_HS_TX_EN) == 1) ? true : false;
316}
317
318static void dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter)
319{
320 if (enter && !dsi_clk_hs_state(dsi))
321 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN);
322 else if (!enter && dsi_clk_hs_state(dsi))
323 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
324}
325
326static void dsi_set_mode(struct mtk_dsi *dsi)
327{
328 u32 vid_mode = CMD_MODE;
329
330 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
331 vid_mode = SYNC_PULSE_MODE;
332
333 if ((dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) &&
334 !(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE))
335 vid_mode = BURST_MODE;
336 }
337
338 writel(vid_mode, dsi->regs + DSI_MODE_CTRL);
339}
340
341static void dsi_ps_control_vact(struct mtk_dsi *dsi)
342{
343 struct videomode *vm = &dsi->vm;
344 u32 dsi_buf_bpp, ps_wc;
345 u32 ps_bpp_mode;
346
347 if (dsi->format == MIPI_DSI_FMT_RGB565)
348 dsi_buf_bpp = 2;
349 else
350 dsi_buf_bpp = 3;
351
352 ps_wc = vm->hactive * dsi_buf_bpp;
353 ps_bpp_mode = ps_wc;
354
355 switch (dsi->format) {
356 case MIPI_DSI_FMT_RGB888:
357 ps_bpp_mode |= PACKED_PS_24BIT_RGB888;
358 break;
359 case MIPI_DSI_FMT_RGB666:
360 ps_bpp_mode |= PACKED_PS_18BIT_RGB666;
361 break;
362 case MIPI_DSI_FMT_RGB666_PACKED:
363 ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666;
364 break;
365 case MIPI_DSI_FMT_RGB565:
366 ps_bpp_mode |= PACKED_PS_16BIT_RGB565;
367 break;
368 }
369
370 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
371 writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL);
372 writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC);
373}
374
375static void dsi_rxtx_control(struct mtk_dsi *dsi)
376{
377 u32 tmp_reg;
378
379 switch (dsi->lanes) {
380 case 1:
381 tmp_reg = 1 << 2;
382 break;
383 case 2:
384 tmp_reg = 3 << 2;
385 break;
386 case 3:
387 tmp_reg = 7 << 2;
388 break;
389 case 4:
390 tmp_reg = 0xf << 2;
391 break;
392 default:
393 tmp_reg = 0xf << 2;
394 break;
395 }
396
397 writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
398}
399
400static void dsi_ps_control(struct mtk_dsi *dsi)
401{
402 unsigned int dsi_tmp_buf_bpp;
403 u32 tmp_reg;
404
405 switch (dsi->format) {
406 case MIPI_DSI_FMT_RGB888:
407 tmp_reg = PACKED_PS_24BIT_RGB888;
408 dsi_tmp_buf_bpp = 3;
409 break;
410 case MIPI_DSI_FMT_RGB666:
411 tmp_reg = LOOSELY_PS_18BIT_RGB666;
412 dsi_tmp_buf_bpp = 3;
413 break;
414 case MIPI_DSI_FMT_RGB666_PACKED:
415 tmp_reg = PACKED_PS_18BIT_RGB666;
416 dsi_tmp_buf_bpp = 3;
417 break;
418 case MIPI_DSI_FMT_RGB565:
419 tmp_reg = PACKED_PS_16BIT_RGB565;
420 dsi_tmp_buf_bpp = 2;
421 break;
422 default:
423 tmp_reg = PACKED_PS_24BIT_RGB888;
424 dsi_tmp_buf_bpp = 3;
425 break;
426 }
427
428 tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC;
429 writel(tmp_reg, dsi->regs + DSI_PSCTRL);
430}
431
432static void dsi_config_vdo_timing(struct mtk_dsi *dsi)
433{
434 unsigned int horizontal_sync_active_byte;
435 unsigned int horizontal_backporch_byte;
436 unsigned int horizontal_frontporch_byte;
437 unsigned int dsi_tmp_buf_bpp;
438
439 struct videomode *vm = &dsi->vm;
440
441 if (dsi->format == MIPI_DSI_FMT_RGB565)
442 dsi_tmp_buf_bpp = 2;
443 else
444 dsi_tmp_buf_bpp = 3;
445
446 writel(vm->vsync_len, dsi->regs + DSI_VSA_NL);
447 writel(vm->vback_porch, dsi->regs + DSI_VBP_NL);
448 writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL);
449 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
450
451 horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
452
453 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
454 horizontal_backporch_byte =
455 (vm->hback_porch * dsi_tmp_buf_bpp - 10);
456 else
457 horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) *
458 dsi_tmp_buf_bpp - 10);
459
460 horizontal_frontporch_byte = (vm->hfront_porch * dsi_tmp_buf_bpp - 12);
461
462 writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
463 writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
464 writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
465
466 dsi_ps_control(dsi);
467}
468
469static void mtk_dsi_start(struct mtk_dsi *dsi)
470{
471 writel(0, dsi->regs + DSI_START);
472 writel(1, dsi->regs + DSI_START);
473}
474
475static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
476{
477 if (WARN_ON(dsi->refcount == 0))
478 return;
479
480 if (--dsi->refcount != 0)
481 return;
482
483 dsi_lane0_ulp_mode_enter(dsi);
484 dsi_clk_ulp_mode_enter(dsi);
485
486 mtk_dsi_disable(dsi);
487
488 clk_disable_unprepare(dsi->engine_clk);
489 clk_disable_unprepare(dsi->digital_clk);
490
491 phy_power_off(dsi->phy);
492}
493
494static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
495{
496 int ret;
497
498 if (dsi->enabled)
499 return;
500
501 if (dsi->panel) {
502 if (drm_panel_prepare(dsi->panel)) {
503 DRM_ERROR("failed to setup the panel\n");
504 return;
505 }
506 }
507
508 ret = mtk_dsi_poweron(dsi);
509 if (ret < 0) {
510 DRM_ERROR("failed to power on dsi\n");
511 return;
512 }
513
514 dsi_rxtx_control(dsi);
515
516 dsi_clk_ulp_mode_leave(dsi);
517 dsi_lane0_ulp_mode_leave(dsi);
518 dsi_clk_hs_mode(dsi, 0);
519 dsi_set_mode(dsi);
520
521 dsi_ps_control_vact(dsi);
522 dsi_config_vdo_timing(dsi);
523
524 dsi_set_mode(dsi);
525 dsi_clk_hs_mode(dsi, 1);
526
527 mtk_dsi_start(dsi);
528
529 dsi->enabled = true;
530}
531
532static void mtk_output_dsi_disable(struct mtk_dsi *dsi)
533{
534 if (!dsi->enabled)
535 return;
536
537 if (dsi->panel) {
538 if (drm_panel_disable(dsi->panel)) {
539 DRM_ERROR("failed to disable the panel\n");
540 return;
541 }
542 }
543
544 mtk_dsi_poweroff(dsi);
545
546 dsi->enabled = false;
547}
548
549static void mtk_dsi_encoder_destroy(struct drm_encoder *encoder)
550{
551 drm_encoder_cleanup(encoder);
552}
553
554static const struct drm_encoder_funcs mtk_dsi_encoder_funcs = {
555 .destroy = mtk_dsi_encoder_destroy,
556};
557
558static bool mtk_dsi_encoder_mode_fixup(struct drm_encoder *encoder,
559 const struct drm_display_mode *mode,
560 struct drm_display_mode *adjusted_mode)
561{
562 return true;
563}
564
565static void mtk_dsi_encoder_mode_set(struct drm_encoder *encoder,
566 struct drm_display_mode *mode,
567 struct drm_display_mode *adjusted)
568{
569 struct mtk_dsi *dsi = encoder_to_dsi(encoder);
570
571 dsi->vm.pixelclock = adjusted->clock;
572 dsi->vm.hactive = adjusted->hdisplay;
573 dsi->vm.hback_porch = adjusted->htotal - adjusted->hsync_end;
574 dsi->vm.hfront_porch = adjusted->hsync_start - adjusted->hdisplay;
575 dsi->vm.hsync_len = adjusted->hsync_end - adjusted->hsync_start;
576
577 dsi->vm.vactive = adjusted->vdisplay;
578 dsi->vm.vback_porch = adjusted->vtotal - adjusted->vsync_end;
579 dsi->vm.vfront_porch = adjusted->vsync_start - adjusted->vdisplay;
580 dsi->vm.vsync_len = adjusted->vsync_end - adjusted->vsync_start;
581}
582
583static void mtk_dsi_encoder_disable(struct drm_encoder *encoder)
584{
585 struct mtk_dsi *dsi = encoder_to_dsi(encoder);
586
587 mtk_output_dsi_disable(dsi);
588}
589
590static void mtk_dsi_encoder_enable(struct drm_encoder *encoder)
591{
592 struct mtk_dsi *dsi = encoder_to_dsi(encoder);
593
594 mtk_output_dsi_enable(dsi);
595}
596
597static int mtk_dsi_connector_get_modes(struct drm_connector *connector)
598{
599 struct mtk_dsi *dsi = connector_to_dsi(connector);
600
601 return drm_panel_get_modes(dsi->panel);
602}
603
604static const struct drm_encoder_helper_funcs mtk_dsi_encoder_helper_funcs = {
605 .mode_fixup = mtk_dsi_encoder_mode_fixup,
606 .mode_set = mtk_dsi_encoder_mode_set,
607 .disable = mtk_dsi_encoder_disable,
608 .enable = mtk_dsi_encoder_enable,
609};
610
611static const struct drm_connector_funcs mtk_dsi_connector_funcs = {
612 .dpms = drm_atomic_helper_connector_dpms,
613 .fill_modes = drm_helper_probe_single_connector_modes,
614 .destroy = drm_connector_cleanup,
615 .reset = drm_atomic_helper_connector_reset,
616 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
617 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
618};
619
620static const struct drm_connector_helper_funcs
621 mtk_dsi_connector_helper_funcs = {
622 .get_modes = mtk_dsi_connector_get_modes,
623};
624
625static int mtk_drm_attach_bridge(struct drm_bridge *bridge,
626 struct drm_encoder *encoder)
627{
628 int ret;
629
630 if (!bridge)
631 return -ENOENT;
632
633 encoder->bridge = bridge;
634 bridge->encoder = encoder;
635 ret = drm_bridge_attach(encoder->dev, bridge);
636 if (ret) {
637 DRM_ERROR("Failed to attach bridge to drm\n");
638 encoder->bridge = NULL;
639 bridge->encoder = NULL;
640 }
641
642 return ret;
643}
644
645static int mtk_dsi_create_connector(struct drm_device *drm, struct mtk_dsi *dsi)
646{
647 int ret;
648
649 ret = drm_connector_init(drm, &dsi->conn, &mtk_dsi_connector_funcs,
650 DRM_MODE_CONNECTOR_DSI);
651 if (ret) {
652 DRM_ERROR("Failed to connector init to drm\n");
653 return ret;
654 }
655
656 drm_connector_helper_add(&dsi->conn, &mtk_dsi_connector_helper_funcs);
657
658 dsi->conn.dpms = DRM_MODE_DPMS_OFF;
659 drm_mode_connector_attach_encoder(&dsi->conn, &dsi->encoder);
660
661 if (dsi->panel) {
662 ret = drm_panel_attach(dsi->panel, &dsi->conn);
663 if (ret) {
664 DRM_ERROR("Failed to attach panel to drm\n");
665 goto err_connector_cleanup;
666 }
667 }
668
669 return 0;
670
671err_connector_cleanup:
672 drm_connector_cleanup(&dsi->conn);
673 return ret;
674}
675
676static int mtk_dsi_create_conn_enc(struct drm_device *drm, struct mtk_dsi *dsi)
677{
678 int ret;
679
680 ret = drm_encoder_init(drm, &dsi->encoder, &mtk_dsi_encoder_funcs,
681 DRM_MODE_ENCODER_DSI, NULL);
682 if (ret) {
683 DRM_ERROR("Failed to encoder init to drm\n");
684 return ret;
685 }
686 drm_encoder_helper_add(&dsi->encoder, &mtk_dsi_encoder_helper_funcs);
687
688 /*
689 * Currently display data paths are statically assigned to a crtc each.
690 * crtc 0 is OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0
691 */
692 dsi->encoder.possible_crtcs = 1;
693
694 /* If there's a bridge, attach to it and let it create the connector */
695 ret = mtk_drm_attach_bridge(dsi->bridge, &dsi->encoder);
696 if (ret) {
697 /* Otherwise create our own connector and attach to a panel */
698 ret = mtk_dsi_create_connector(drm, dsi);
699 if (ret)
700 goto err_encoder_cleanup;
701 }
702
703 return 0;
704
705err_encoder_cleanup:
706 drm_encoder_cleanup(&dsi->encoder);
707 return ret;
708}
709
710static void mtk_dsi_destroy_conn_enc(struct mtk_dsi *dsi)
711{
712 drm_encoder_cleanup(&dsi->encoder);
713 /* Skip connector cleanup if creation was delegated to the bridge */
714 if (dsi->conn.dev)
715 drm_connector_cleanup(&dsi->conn);
716}
717
718static void mtk_dsi_ddp_start(struct mtk_ddp_comp *comp)
719{
720 struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp);
721
722 mtk_dsi_poweron(dsi);
723}
724
725static void mtk_dsi_ddp_stop(struct mtk_ddp_comp *comp)
726{
727 struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp);
728
729 mtk_dsi_poweroff(dsi);
730}
731
732static const struct mtk_ddp_comp_funcs mtk_dsi_funcs = {
733 .start = mtk_dsi_ddp_start,
734 .stop = mtk_dsi_ddp_stop,
735};
736
737static int mtk_dsi_host_attach(struct mipi_dsi_host *host,
738 struct mipi_dsi_device *device)
739{
740 struct mtk_dsi *dsi = host_to_dsi(host);
741
742 dsi->lanes = device->lanes;
743 dsi->format = device->format;
744 dsi->mode_flags = device->mode_flags;
745
746 if (dsi->conn.dev)
747 drm_helper_hpd_irq_event(dsi->conn.dev);
748
749 return 0;
750}
751
752static int mtk_dsi_host_detach(struct mipi_dsi_host *host,
753 struct mipi_dsi_device *device)
754{
755 struct mtk_dsi *dsi = host_to_dsi(host);
756
757 if (dsi->conn.dev)
758 drm_helper_hpd_irq_event(dsi->conn.dev);
759
760 return 0;
761}
762
763static const struct mipi_dsi_host_ops mtk_dsi_ops = {
764 .attach = mtk_dsi_host_attach,
765 .detach = mtk_dsi_host_detach,
766};
767
768static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
769{
770 int ret;
771 struct drm_device *drm = data;
772 struct mtk_dsi *dsi = dev_get_drvdata(dev);
773
774 ret = mtk_ddp_comp_register(drm, &dsi->ddp_comp);
775 if (ret < 0) {
776 dev_err(dev, "Failed to register component %s: %d\n",
777 dev->of_node->full_name, ret);
778 return ret;
779 }
780
781 ret = mipi_dsi_host_register(&dsi->host);
782 if (ret < 0) {
783 dev_err(dev, "failed to register DSI host: %d\n", ret);
784 goto err_ddp_comp_unregister;
785 }
786
787 ret = mtk_dsi_create_conn_enc(drm, dsi);
788 if (ret) {
789 DRM_ERROR("Encoder create failed with %d\n", ret);
790 goto err_unregister;
791 }
792
793 return 0;
794
795err_unregister:
796 mipi_dsi_host_unregister(&dsi->host);
797err_ddp_comp_unregister:
798 mtk_ddp_comp_unregister(drm, &dsi->ddp_comp);
799 return ret;
800}
801
802static void mtk_dsi_unbind(struct device *dev, struct device *master,
803 void *data)
804{
805 struct drm_device *drm = data;
806 struct mtk_dsi *dsi = dev_get_drvdata(dev);
807
808 mtk_dsi_destroy_conn_enc(dsi);
809 mipi_dsi_host_unregister(&dsi->host);
810 mtk_ddp_comp_unregister(drm, &dsi->ddp_comp);
811}
812
813static const struct component_ops mtk_dsi_component_ops = {
814 .bind = mtk_dsi_bind,
815 .unbind = mtk_dsi_unbind,
816};
817
818static int mtk_dsi_probe(struct platform_device *pdev)
819{
820 struct mtk_dsi *dsi;
821 struct device *dev = &pdev->dev;
822 struct device_node *remote_node, *endpoint;
823 struct resource *regs;
824 int comp_id;
825 int ret;
826
827 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
828 if (!dsi)
829 return -ENOMEM;
830
831 dsi->host.ops = &mtk_dsi_ops;
832 dsi->host.dev = dev;
833
834 endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
835 if (endpoint) {
836 remote_node = of_graph_get_remote_port_parent(endpoint);
837 if (!remote_node) {
838 dev_err(dev, "No panel connected\n");
839 return -ENODEV;
840 }
841
842 dsi->bridge = of_drm_find_bridge(remote_node);
843 dsi->panel = of_drm_find_panel(remote_node);
844 of_node_put(remote_node);
845 if (!dsi->bridge && !dsi->panel) {
846 dev_info(dev, "Waiting for bridge or panel driver\n");
847 return -EPROBE_DEFER;
848 }
849 }
850
851 dsi->engine_clk = devm_clk_get(dev, "engine");
852 if (IS_ERR(dsi->engine_clk)) {
853 ret = PTR_ERR(dsi->engine_clk);
854 dev_err(dev, "Failed to get engine clock: %d\n", ret);
855 return ret;
856 }
857
858 dsi->digital_clk = devm_clk_get(dev, "digital");
859 if (IS_ERR(dsi->digital_clk)) {
860 ret = PTR_ERR(dsi->digital_clk);
861 dev_err(dev, "Failed to get digital clock: %d\n", ret);
862 return ret;
863 }
864
865 dsi->hs_clk = devm_clk_get(dev, "hs");
866 if (IS_ERR(dsi->hs_clk)) {
867 ret = PTR_ERR(dsi->hs_clk);
868 dev_err(dev, "Failed to get hs clock: %d\n", ret);
869 return ret;
870 }
871
872 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
873 dsi->regs = devm_ioremap_resource(dev, regs);
874 if (IS_ERR(dsi->regs)) {
875 ret = PTR_ERR(dsi->regs);
876 dev_err(dev, "Failed to ioremap memory: %d\n", ret);
877 return ret;
878 }
879
880 dsi->phy = devm_phy_get(dev, "dphy");
881 if (IS_ERR(dsi->phy)) {
882 ret = PTR_ERR(dsi->phy);
883 dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret);
884 return ret;
885 }
886
887 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DSI);
888 if (comp_id < 0) {
889 dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
890 return comp_id;
891 }
892
893 ret = mtk_ddp_comp_init(dev, dev->of_node, &dsi->ddp_comp, comp_id,
894 &mtk_dsi_funcs);
895 if (ret) {
896 dev_err(dev, "Failed to initialize component: %d\n", ret);
897 return ret;
898 }
899
900 platform_set_drvdata(pdev, dsi);
901
902 return component_add(&pdev->dev, &mtk_dsi_component_ops);
903}
904
905static int mtk_dsi_remove(struct platform_device *pdev)
906{
907 struct mtk_dsi *dsi = platform_get_drvdata(pdev);
908
909 mtk_output_dsi_disable(dsi);
910 component_del(&pdev->dev, &mtk_dsi_component_ops);
911
912 return 0;
913}
914
915static const struct of_device_id mtk_dsi_of_match[] = {
916 { .compatible = "mediatek,mt8173-dsi" },
917 { },
918};
919
920struct platform_driver mtk_dsi_driver = {
921 .probe = mtk_dsi_probe,
922 .remove = mtk_dsi_remove,
923 .driver = {
924 .name = "mtk-dsi",
925 .of_match_table = mtk_dsi_of_match,
926 },
927};