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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / gpu / drm / mediatek / mtk_dsi.c
blob5fa1073cf26b9f78f64ffd7f9ba5b7337f1bf0f7
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
15 #include <video/mipi_display.h>
16 #include <video/videomode.h>
17
18 #include <drm/drm_atomic_helper.h>
19 #include <drm/drm_bridge.h>
20 #include <drm/drm_mipi_dsi.h>
21 #include <drm/drm_of.h>
22 #include <drm/drm_panel.h>
23 #include <drm/drm_print.h>
24 #include <drm/drm_probe_helper.h>
25
26 #include "mtk_drm_ddp_comp.h"
27
28 #define DSI_START 0x00
29
30 #define DSI_INTEN 0x08
31
32 #define DSI_INTSTA 0x0c
33 #define LPRX_RD_RDY_INT_FLAG BIT(0)
34 #define CMD_DONE_INT_FLAG BIT(1)
35 #define TE_RDY_INT_FLAG BIT(2)
36 #define VM_DONE_INT_FLAG BIT(3)
37 #define EXT_TE_RDY_INT_FLAG BIT(4)
38 #define DSI_BUSY BIT(31)
39
40 #define DSI_CON_CTRL 0x10
41 #define DSI_RESET BIT(0)
42 #define DSI_EN BIT(1)
43 #define DPHY_RESET BIT(2)
44
45 #define DSI_MODE_CTRL 0x14
46 #define MODE (3)
47 #define CMD_MODE 0
48 #define SYNC_PULSE_MODE 1
49 #define SYNC_EVENT_MODE 2
50 #define BURST_MODE 3
51 #define FRM_MODE BIT(16)
52 #define MIX_MODE BIT(17)
53
54 #define DSI_TXRX_CTRL 0x18
55 #define VC_NUM BIT(1)
56 #define LANE_NUM (0xf << 2)
57 #define DIS_EOT BIT(6)
58 #define NULL_EN BIT(7)
59 #define TE_FREERUN BIT(8)
60 #define EXT_TE_EN BIT(9)
61 #define EXT_TE_EDGE BIT(10)
62 #define MAX_RTN_SIZE (0xf << 12)
63 #define HSTX_CKLP_EN BIT(16)
64
65 #define DSI_PSCTRL 0x1c
66 #define DSI_PS_WC 0x3fff
67 #define DSI_PS_SEL (3 << 16)
68 #define PACKED_PS_16BIT_RGB565 (0 << 16)
69 #define LOOSELY_PS_18BIT_RGB666 (1 << 16)
70 #define PACKED_PS_18BIT_RGB666 (2 << 16)
71 #define PACKED_PS_24BIT_RGB888 (3 << 16)
72
73 #define DSI_VSA_NL 0x20
74 #define DSI_VBP_NL 0x24
75 #define DSI_VFP_NL 0x28
76 #define DSI_VACT_NL 0x2C
77 #define DSI_SIZE_CON 0x38
78 #define DSI_HSA_WC 0x50
79 #define DSI_HBP_WC 0x54
80 #define DSI_HFP_WC 0x58
81
82 #define DSI_CMDQ_SIZE 0x60
83 #define CMDQ_SIZE 0x3f
84
85 #define DSI_HSTX_CKL_WC 0x64
86
87 #define DSI_RX_DATA0 0x74
88 #define DSI_RX_DATA1 0x78
89 #define DSI_RX_DATA2 0x7c
90 #define DSI_RX_DATA3 0x80
91
92 #define DSI_RACK 0x84
93 #define RACK BIT(0)
94
95 #define DSI_PHY_LCCON 0x104
96 #define LC_HS_TX_EN BIT(0)
97 #define LC_ULPM_EN BIT(1)
98 #define LC_WAKEUP_EN BIT(2)
99
100 #define DSI_PHY_LD0CON 0x108
101 #define LD0_HS_TX_EN BIT(0)
102 #define LD0_ULPM_EN BIT(1)
103 #define LD0_WAKEUP_EN BIT(2)
104
105 #define DSI_PHY_TIMECON0 0x110
106 #define LPX (0xff << 0)
107 #define HS_PREP (0xff << 8)
108 #define HS_ZERO (0xff << 16)
109 #define HS_TRAIL (0xff << 24)
110
111 #define DSI_PHY_TIMECON1 0x114
112 #define TA_GO (0xff << 0)
113 #define TA_SURE (0xff << 8)
114 #define TA_GET (0xff << 16)
115 #define DA_HS_EXIT (0xff << 24)
116
117 #define DSI_PHY_TIMECON2 0x118
118 #define CONT_DET (0xff << 0)
119 #define CLK_ZERO (0xff << 16)
120 #define CLK_TRAIL (0xff << 24)
121
122 #define DSI_PHY_TIMECON3 0x11c
123 #define CLK_HS_PREP (0xff << 0)
124 #define CLK_HS_POST (0xff << 8)
125 #define CLK_HS_EXIT (0xff << 16)
126
127 #define DSI_VM_CMD_CON 0x130
128 #define VM_CMD_EN BIT(0)
129 #define TS_VFP_EN BIT(5)
130
131 #define DSI_SHADOW_DEBUG 0x190U
132 #define FORCE_COMMIT BIT(0)
133 #define BYPASS_SHADOW BIT(1)
134
135 #define CONFIG (0xff << 0)
136 #define SHORT_PACKET 0
137 #define LONG_PACKET 2
138 #define BTA BIT(2)
139 #define DATA_ID (0xff << 8)
140 #define DATA_0 (0xff << 16)
141 #define DATA_1 (0xff << 24)
142
143 #define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0))
144
145 #define MTK_DSI_HOST_IS_READ(type) \
146 ((type == MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM) || \
147 (type == MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM) || \
148 (type == MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM) || \
149 (type == MIPI_DSI_DCS_READ))
150
151 struct mtk_phy_timing {
152 u32 lpx;
153 u32 da_hs_prepare;
154 u32 da_hs_zero;
155 u32 da_hs_trail;
156
157 u32 ta_go;
158 u32 ta_sure;
159 u32 ta_get;
160 u32 da_hs_exit;
161
162 u32 clk_hs_zero;
163 u32 clk_hs_trail;
164
165 u32 clk_hs_prepare;
166 u32 clk_hs_post;
167 u32 clk_hs_exit;
168 };
169
170 struct phy;
171
172 struct mtk_dsi_driver_data {
173 const u32 reg_cmdq_off;
174 bool has_shadow_ctl;
175 bool has_size_ctl;
176 };
177
178 struct mtk_dsi {
179 struct mtk_ddp_comp ddp_comp;
180 struct device *dev;
181 struct mipi_dsi_host host;
182 struct drm_encoder encoder;
183 struct drm_connector conn;
184 struct drm_panel *panel;
185 struct drm_bridge *bridge;
186 struct phy *phy;
187
188 void __iomem *regs;
189
190 struct clk *engine_clk;
191 struct clk *digital_clk;
192 struct clk *hs_clk;
193
194 u32 data_rate;
195
196 unsigned long mode_flags;
197 enum mipi_dsi_pixel_format format;
198 unsigned int lanes;
199 struct videomode vm;
200 struct mtk_phy_timing phy_timing;
201 int refcount;
202 bool enabled;
203 u32 irq_data;
204 wait_queue_head_t irq_wait_queue;
205 const struct mtk_dsi_driver_data *driver_data;
206 };
207
208 static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e)
209 {
210 return container_of(e, struct mtk_dsi, encoder);
211 }
212
213 static inline struct mtk_dsi *connector_to_dsi(struct drm_connector *c)
214 {
215 return container_of(c, struct mtk_dsi, conn);
216 }
217
218 static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h)
219 {
220 return container_of(h, struct mtk_dsi, host);
221 }
222
223 static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
224 {
225 u32 temp = readl(dsi->regs + offset);
226
227 writel((temp & ~mask) | (data & mask), dsi->regs + offset);
228 }
229
230 static void mtk_dsi_phy_timconfig(struct mtk_dsi *dsi)
231 {
232 u32 timcon0, timcon1, timcon2, timcon3;
233 u32 data_rate_mhz = DIV_ROUND_UP(dsi->data_rate, 1000000);
234 struct mtk_phy_timing *timing = &dsi->phy_timing;
235
236 timing->lpx = (60 * data_rate_mhz / (8 * 1000)) + 1;
237 timing->da_hs_prepare = (80 * data_rate_mhz + 4 * 1000) / 8000;
238 timing->da_hs_zero = (170 * data_rate_mhz + 10 * 1000) / 8000 + 1 -
239 timing->da_hs_prepare;
240 timing->da_hs_trail = timing->da_hs_prepare + 1;
241
242 timing->ta_go = 4 * timing->lpx - 2;
243 timing->ta_sure = timing->lpx + 2;
244 timing->ta_get = 4 * timing->lpx;
245 timing->da_hs_exit = 2 * timing->lpx + 1;
246
247 timing->clk_hs_prepare = 70 * data_rate_mhz / (8 * 1000);
248 timing->clk_hs_post = timing->clk_hs_prepare + 8;
249 timing->clk_hs_trail = timing->clk_hs_prepare;
250 timing->clk_hs_zero = timing->clk_hs_trail * 4;
251 timing->clk_hs_exit = 2 * timing->clk_hs_trail;
252
253 timcon0 = timing->lpx | timing->da_hs_prepare << 8 |
254 timing->da_hs_zero << 16 | timing->da_hs_trail << 24;
255 timcon1 = timing->ta_go | timing->ta_sure << 8 |
256 timing->ta_get << 16 | timing->da_hs_exit << 24;
257 timcon2 = 1 << 8 | timing->clk_hs_zero << 16 |
258 timing->clk_hs_trail << 24;
259 timcon3 = timing->clk_hs_prepare | timing->clk_hs_post << 8 |
260 timing->clk_hs_exit << 16;
261
262 writel(timcon0, dsi->regs + DSI_PHY_TIMECON0);
263 writel(timcon1, dsi->regs + DSI_PHY_TIMECON1);
264 writel(timcon2, dsi->regs + DSI_PHY_TIMECON2);
265 writel(timcon3, dsi->regs + DSI_PHY_TIMECON3);
266 }
267
268 static void mtk_dsi_enable(struct mtk_dsi *dsi)
269 {
270 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN);
271 }
272
273 static void mtk_dsi_disable(struct mtk_dsi *dsi)
274 {
275 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0);
276 }
277
278 static void mtk_dsi_reset_engine(struct mtk_dsi *dsi)
279 {
280 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET);
281 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0);
282 }
283
284 static void mtk_dsi_reset_dphy(struct mtk_dsi *dsi)
285 {
286 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, DPHY_RESET);
287 mtk_dsi_mask(dsi, DSI_CON_CTRL, DPHY_RESET, 0);
288 }
289
290 static void mtk_dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi)
291 {
292 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
293 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
294 }
295
296 static void mtk_dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi)
297 {
298 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
299 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN);
300 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0);
301 }
302
303 static void mtk_dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi)
304 {
305 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0);
306 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
307 }
308
309 static void mtk_dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi)
310 {
311 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
312 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN);
313 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0);
314 }
315
316 static bool mtk_dsi_clk_hs_state(struct mtk_dsi *dsi)
317 {
318 u32 tmp_reg1;
319
320 tmp_reg1 = readl(dsi->regs + DSI_PHY_LCCON);
321 return ((tmp_reg1 & LC_HS_TX_EN) == 1) ? true : false;
322 }
323
324 static void mtk_dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter)
325 {
326 if (enter && !mtk_dsi_clk_hs_state(dsi))
327 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN);
328 else if (!enter && mtk_dsi_clk_hs_state(dsi))
329 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
330 }
331
332 static void mtk_dsi_set_mode(struct mtk_dsi *dsi)
333 {
334 u32 vid_mode = CMD_MODE;
335
336 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
337 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
338 vid_mode = BURST_MODE;
339 else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
340 vid_mode = SYNC_PULSE_MODE;
341 else
342 vid_mode = SYNC_EVENT_MODE;
343 }
344
345 writel(vid_mode, dsi->regs + DSI_MODE_CTRL);
346 }
347
348 static void mtk_dsi_set_vm_cmd(struct mtk_dsi *dsi)
349 {
350 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, VM_CMD_EN, VM_CMD_EN);
351 mtk_dsi_mask(dsi, DSI_VM_CMD_CON, TS_VFP_EN, TS_VFP_EN);
352 }
353
354 static void mtk_dsi_ps_control_vact(struct mtk_dsi *dsi)
355 {
356 struct videomode *vm = &dsi->vm;
357 u32 dsi_buf_bpp, ps_wc;
358 u32 ps_bpp_mode;
359
360 if (dsi->format == MIPI_DSI_FMT_RGB565)
361 dsi_buf_bpp = 2;
362 else
363 dsi_buf_bpp = 3;
364
365 ps_wc = vm->hactive * dsi_buf_bpp;
366 ps_bpp_mode = ps_wc;
367
368 switch (dsi->format) {
369 case MIPI_DSI_FMT_RGB888:
370 ps_bpp_mode |= PACKED_PS_24BIT_RGB888;
371 break;
372 case MIPI_DSI_FMT_RGB666:
373 ps_bpp_mode |= PACKED_PS_18BIT_RGB666;
374 break;
375 case MIPI_DSI_FMT_RGB666_PACKED:
376 ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666;
377 break;
378 case MIPI_DSI_FMT_RGB565:
379 ps_bpp_mode |= PACKED_PS_16BIT_RGB565;
380 break;
381 }
382
383 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
384 writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL);
385 writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC);
386 }
387
388 static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi)
389 {
390 u32 tmp_reg;
391
392 switch (dsi->lanes) {
393 case 1:
394 tmp_reg = 1 << 2;
395 break;
396 case 2:
397 tmp_reg = 3 << 2;
398 break;
399 case 3:
400 tmp_reg = 7 << 2;
401 break;
402 case 4:
403 tmp_reg = 0xf << 2;
404 break;
405 default:
406 tmp_reg = 0xf << 2;
407 break;
408 }
409
410 tmp_reg |= (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) << 6;
411 tmp_reg |= (dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET) >> 3;
412
413 writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
414 }
415
416 static void mtk_dsi_ps_control(struct mtk_dsi *dsi)
417 {
418 u32 dsi_tmp_buf_bpp;
419 u32 tmp_reg;
420
421 switch (dsi->format) {
422 case MIPI_DSI_FMT_RGB888:
423 tmp_reg = PACKED_PS_24BIT_RGB888;
424 dsi_tmp_buf_bpp = 3;
425 break;
426 case MIPI_DSI_FMT_RGB666:
427 tmp_reg = LOOSELY_PS_18BIT_RGB666;
428 dsi_tmp_buf_bpp = 3;
429 break;
430 case MIPI_DSI_FMT_RGB666_PACKED:
431 tmp_reg = PACKED_PS_18BIT_RGB666;
432 dsi_tmp_buf_bpp = 3;
433 break;
434 case MIPI_DSI_FMT_RGB565:
435 tmp_reg = PACKED_PS_16BIT_RGB565;
436 dsi_tmp_buf_bpp = 2;
437 break;
438 default:
439 tmp_reg = PACKED_PS_24BIT_RGB888;
440 dsi_tmp_buf_bpp = 3;
441 break;
442 }
443
444 tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC;
445 writel(tmp_reg, dsi->regs + DSI_PSCTRL);
446 }
447
448 static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
449 {
450 u32 horizontal_sync_active_byte;
451 u32 horizontal_backporch_byte;
452 u32 horizontal_frontporch_byte;
453 u32 dsi_tmp_buf_bpp, data_phy_cycles;
454 struct mtk_phy_timing *timing = &dsi->phy_timing;
455
456 struct videomode *vm = &dsi->vm;
457
458 if (dsi->format == MIPI_DSI_FMT_RGB565)
459 dsi_tmp_buf_bpp = 2;
460 else
461 dsi_tmp_buf_bpp = 3;
462
463 writel(vm->vsync_len, dsi->regs + DSI_VSA_NL);
464 writel(vm->vback_porch, dsi->regs + DSI_VBP_NL);
465 writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL);
466 writel(vm->vactive, dsi->regs + DSI_VACT_NL);
467
468 if (dsi->driver_data->has_size_ctl)
469 writel(vm->vactive << 16 | vm->hactive,
470 dsi->regs + DSI_SIZE_CON);
471
472 horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
473
474 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
475 horizontal_backporch_byte =
476 (vm->hback_porch * dsi_tmp_buf_bpp - 10);
477 else
478 horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) *
479 dsi_tmp_buf_bpp - 10);
480
481 data_phy_cycles = timing->lpx + timing->da_hs_prepare +
482 timing->da_hs_zero + timing->da_hs_exit + 3;
483
484 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) {
485 if ((vm->hfront_porch + vm->hback_porch) * dsi_tmp_buf_bpp >
486 data_phy_cycles * dsi->lanes + 18) {
487 horizontal_frontporch_byte =
488 vm->hfront_porch * dsi_tmp_buf_bpp -
489 (data_phy_cycles * dsi->lanes + 18) *
490 vm->hfront_porch /
491 (vm->hfront_porch + vm->hback_porch);
492
493 horizontal_backporch_byte =
494 horizontal_backporch_byte -
495 (data_phy_cycles * dsi->lanes + 18) *
496 vm->hback_porch /
497 (vm->hfront_porch + vm->hback_porch);
498 } else {
499 DRM_WARN("HFP less than d-phy, FPS will under 60Hz\n");
500 horizontal_frontporch_byte = vm->hfront_porch *
501 dsi_tmp_buf_bpp;
502 }
503 } else {
504 if ((vm->hfront_porch + vm->hback_porch) * dsi_tmp_buf_bpp >
505 data_phy_cycles * dsi->lanes + 12) {
506 horizontal_frontporch_byte =
507 vm->hfront_porch * dsi_tmp_buf_bpp -
508 (data_phy_cycles * dsi->lanes + 12) *
509 vm->hfront_porch /
510 (vm->hfront_porch + vm->hback_porch);
511 horizontal_backporch_byte = horizontal_backporch_byte -
512 (data_phy_cycles * dsi->lanes + 12) *
513 vm->hback_porch /
514 (vm->hfront_porch + vm->hback_porch);
515 } else {
516 DRM_WARN("HFP less than d-phy, FPS will under 60Hz\n");
517 horizontal_frontporch_byte = vm->hfront_porch *
518 dsi_tmp_buf_bpp;
519 }
520 }
521
522 writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
523 writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
524 writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
525
526 mtk_dsi_ps_control(dsi);
527 }
528
529 static void mtk_dsi_start(struct mtk_dsi *dsi)
530 {
531 writel(0, dsi->regs + DSI_START);
532 writel(1, dsi->regs + DSI_START);
533 }
534
535 static void mtk_dsi_stop(struct mtk_dsi *dsi)
536 {
537 writel(0, dsi->regs + DSI_START);
538 }
539
540 static void mtk_dsi_set_cmd_mode(struct mtk_dsi *dsi)
541 {
542 writel(CMD_MODE, dsi->regs + DSI_MODE_CTRL);
543 }
544
545 static void mtk_dsi_set_interrupt_enable(struct mtk_dsi *dsi)
546 {
547 u32 inten = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
548
549 writel(inten, dsi->regs + DSI_INTEN);
550 }
551
552 static void mtk_dsi_irq_data_set(struct mtk_dsi *dsi, u32 irq_bit)
553 {
554 dsi->irq_data |= irq_bit;
555 }
556
557 static void mtk_dsi_irq_data_clear(struct mtk_dsi *dsi, u32 irq_bit)
558 {
559 dsi->irq_data &= ~irq_bit;
560 }
561
562 static s32 mtk_dsi_wait_for_irq_done(struct mtk_dsi *dsi, u32 irq_flag,
563 unsigned int timeout)
564 {
565 s32 ret = 0;
566 unsigned long jiffies = msecs_to_jiffies(timeout);
567
568 ret = wait_event_interruptible_timeout(dsi->irq_wait_queue,
569 dsi->irq_data & irq_flag,
570 jiffies);
571 if (ret == 0) {
572 DRM_WARN("Wait DSI IRQ(0x%08x) Timeout\n", irq_flag);
573
574 mtk_dsi_enable(dsi);
575 mtk_dsi_reset_engine(dsi);
576 }
577
578 return ret;
579 }
580
581 static irqreturn_t mtk_dsi_irq(int irq, void *dev_id)
582 {
583 struct mtk_dsi *dsi = dev_id;
584 u32 status, tmp;
585 u32 flag = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG;
586
587 status = readl(dsi->regs + DSI_INTSTA) & flag;
588
589 if (status) {
590 do {
591 mtk_dsi_mask(dsi, DSI_RACK, RACK, RACK);
592 tmp = readl(dsi->regs + DSI_INTSTA);
593 } while (tmp & DSI_BUSY);
594
595 mtk_dsi_mask(dsi, DSI_INTSTA, status, 0);
596 mtk_dsi_irq_data_set(dsi, status);
597 wake_up_interruptible(&dsi->irq_wait_queue);
598 }
599
600 return IRQ_HANDLED;
601 }
602
603 static s32 mtk_dsi_switch_to_cmd_mode(struct mtk_dsi *dsi, u8 irq_flag, u32 t)
604 {
605 mtk_dsi_irq_data_clear(dsi, irq_flag);
606 mtk_dsi_set_cmd_mode(dsi);
607
608 if (!mtk_dsi_wait_for_irq_done(dsi, irq_flag, t)) {
609 DRM_ERROR("failed to switch cmd mode\n");
610 return -ETIME;
611 } else {
612 return 0;
613 }
614 }
615
616 static int mtk_dsi_poweron(struct mtk_dsi *dsi)
617 {
618 struct device *dev = dsi->host.dev;
619 int ret;
620 u32 bit_per_pixel;
621
622 if (++dsi->refcount != 1)
623 return 0;
624
625 switch (dsi->format) {
626 case MIPI_DSI_FMT_RGB565:
627 bit_per_pixel = 16;
628 break;
629 case MIPI_DSI_FMT_RGB666_PACKED:
630 bit_per_pixel = 18;
631 break;
632 case MIPI_DSI_FMT_RGB666:
633 case MIPI_DSI_FMT_RGB888:
634 default:
635 bit_per_pixel = 24;
636 break;
637 }
638
639 dsi->data_rate = DIV_ROUND_UP_ULL(dsi->vm.pixelclock * bit_per_pixel,
640 dsi->lanes);
641
642 ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
643 if (ret < 0) {
644 dev_err(dev, "Failed to set data rate: %d\n", ret);
645 goto err_refcount;
646 }
647
648 phy_power_on(dsi->phy);
649
650 ret = clk_prepare_enable(dsi->engine_clk);
651 if (ret < 0) {
652 dev_err(dev, "Failed to enable engine clock: %d\n", ret);
653 goto err_phy_power_off;
654 }
655
656 ret = clk_prepare_enable(dsi->digital_clk);
657 if (ret < 0) {
658 dev_err(dev, "Failed to enable digital clock: %d\n", ret);
659 goto err_disable_engine_clk;
660 }
661
662 mtk_dsi_enable(dsi);
663
664 if (dsi->driver_data->has_shadow_ctl)
665 writel(FORCE_COMMIT | BYPASS_SHADOW,
666 dsi->regs + DSI_SHADOW_DEBUG);
667
668 mtk_dsi_reset_engine(dsi);
669 mtk_dsi_phy_timconfig(dsi);
670
671 mtk_dsi_rxtx_control(dsi);
672 usleep_range(30, 100);
673 mtk_dsi_reset_dphy(dsi);
674 mtk_dsi_ps_control_vact(dsi);
675 mtk_dsi_set_vm_cmd(dsi);
676 mtk_dsi_config_vdo_timing(dsi);
677 mtk_dsi_set_interrupt_enable(dsi);
678
679 mtk_dsi_clk_ulp_mode_leave(dsi);
680 mtk_dsi_lane0_ulp_mode_leave(dsi);
681 mtk_dsi_clk_hs_mode(dsi, 0);
682
683 if (dsi->panel) {
684 if (drm_panel_prepare(dsi->panel)) {
685 DRM_ERROR("failed to prepare the panel\n");
686 goto err_disable_digital_clk;
687 }
688 }
689
690 return 0;
691 err_disable_digital_clk:
692 clk_disable_unprepare(dsi->digital_clk);
693 err_disable_engine_clk:
694 clk_disable_unprepare(dsi->engine_clk);
695 err_phy_power_off:
696 phy_power_off(dsi->phy);
697 err_refcount:
698 dsi->refcount--;
699 return ret;
700 }
701
702 static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
703 {
704 if (WARN_ON(dsi->refcount == 0))
705 return;
706
707 if (--dsi->refcount != 0)
708 return;
709
710 /*
711 * mtk_dsi_stop() and mtk_dsi_start() is asymmetric, since
712 * mtk_dsi_stop() should be called after mtk_drm_crtc_atomic_disable(),
713 * which needs irq for vblank, and mtk_dsi_stop() will disable irq.
714 * mtk_dsi_start() needs to be called in mtk_output_dsi_enable(),
715 * after dsi is fully set.
716 */
717 mtk_dsi_stop(dsi);
718
719 if (!mtk_dsi_switch_to_cmd_mode(dsi, VM_DONE_INT_FLAG, 500)) {
720 if (dsi->panel) {
721 if (drm_panel_unprepare(dsi->panel)) {
722 DRM_ERROR("failed to unprepare the panel\n");
723 return;
724 }
725 }
726 }
727
728 mtk_dsi_reset_engine(dsi);
729 mtk_dsi_lane0_ulp_mode_enter(dsi);
730 mtk_dsi_clk_ulp_mode_enter(dsi);
731
732 mtk_dsi_disable(dsi);
733
734 clk_disable_unprepare(dsi->engine_clk);
735 clk_disable_unprepare(dsi->digital_clk);
736
737 phy_power_off(dsi->phy);
738 }
739
740 static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
741 {
742 int ret;
743
744 if (dsi->enabled)
745 return;
746
747 ret = mtk_dsi_poweron(dsi);
748 if (ret < 0) {
749 DRM_ERROR("failed to power on dsi\n");
750 return;
751 }
752
753 mtk_dsi_set_mode(dsi);
754 mtk_dsi_clk_hs_mode(dsi, 1);
755
756 mtk_dsi_start(dsi);
757
758 if (dsi->panel) {
759 if (drm_panel_enable(dsi->panel)) {
760 DRM_ERROR("failed to enable the panel\n");
761 goto err_dsi_power_off;
762 }
763 }
764
765 dsi->enabled = true;
766
767 return;
768 err_dsi_power_off:
769 mtk_dsi_stop(dsi);
770 mtk_dsi_poweroff(dsi);
771 }
772
773 static void mtk_output_dsi_disable(struct mtk_dsi *dsi)
774 {
775 if (!dsi->enabled)
776 return;
777
778 if (dsi->panel) {
779 if (drm_panel_disable(dsi->panel)) {
780 DRM_ERROR("failed to disable the panel\n");
781 return;
782 }
783 }
784
785 mtk_dsi_poweroff(dsi);
786
787 dsi->enabled = false;
788 }
789
790 static void mtk_dsi_encoder_destroy(struct drm_encoder *encoder)
791 {
792 drm_encoder_cleanup(encoder);
793 }
794
795 static const struct drm_encoder_funcs mtk_dsi_encoder_funcs = {
796 .destroy = mtk_dsi_encoder_destroy,
797 };
798
799 static bool mtk_dsi_encoder_mode_fixup(struct drm_encoder *encoder,
800 const struct drm_display_mode *mode,
801 struct drm_display_mode *adjusted_mode)
802 {
803 return true;
804 }
805
806 static void mtk_dsi_encoder_mode_set(struct drm_encoder *encoder,
807 struct drm_display_mode *mode,
808 struct drm_display_mode *adjusted)
809 {
810 struct mtk_dsi *dsi = encoder_to_dsi(encoder);
811
812 drm_display_mode_to_videomode(adjusted, &dsi->vm);
813 }
814
815 static void mtk_dsi_encoder_disable(struct drm_encoder *encoder)
816 {
817 struct mtk_dsi *dsi = encoder_to_dsi(encoder);
818
819 mtk_output_dsi_disable(dsi);
820 }
821
822 static void mtk_dsi_encoder_enable(struct drm_encoder *encoder)
823 {
824 struct mtk_dsi *dsi = encoder_to_dsi(encoder);
825
826 mtk_output_dsi_enable(dsi);
827 }
828
829 static int mtk_dsi_connector_get_modes(struct drm_connector *connector)
830 {
831 struct mtk_dsi *dsi = connector_to_dsi(connector);
832
833 return drm_panel_get_modes(dsi->panel, connector);
834 }
835
836 static const struct drm_encoder_helper_funcs mtk_dsi_encoder_helper_funcs = {
837 .mode_fixup = mtk_dsi_encoder_mode_fixup,
838 .mode_set = mtk_dsi_encoder_mode_set,
839 .disable = mtk_dsi_encoder_disable,
840 .enable = mtk_dsi_encoder_enable,
841 };
842
843 static const struct drm_connector_funcs mtk_dsi_connector_funcs = {
844 .fill_modes = drm_helper_probe_single_connector_modes,
845 .destroy = drm_connector_cleanup,
846 .reset = drm_atomic_helper_connector_reset,
847 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
848 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
849 };
850
851 static const struct drm_connector_helper_funcs
852 mtk_dsi_connector_helper_funcs = {
853 .get_modes = mtk_dsi_connector_get_modes,
854 };
855
856 static int mtk_dsi_create_connector(struct drm_device *drm, struct mtk_dsi *dsi)
857 {
858 int ret;
859
860 ret = drm_connector_init(drm, &dsi->conn, &mtk_dsi_connector_funcs,
861 DRM_MODE_CONNECTOR_DSI);
862 if (ret) {
863 DRM_ERROR("Failed to connector init to drm\n");
864 return ret;
865 }
866
867 drm_connector_helper_add(&dsi->conn, &mtk_dsi_connector_helper_funcs);
868
869 dsi->conn.dpms = DRM_MODE_DPMS_OFF;
870 drm_connector_attach_encoder(&dsi->conn, &dsi->encoder);
871
872 if (dsi->panel) {
873 ret = drm_panel_attach(dsi->panel, &dsi->conn);
874 if (ret) {
875 DRM_ERROR("Failed to attach panel to drm\n");
876 goto err_connector_cleanup;
877 }
878 }
879
880 return 0;
881
882 err_connector_cleanup:
883 drm_connector_cleanup(&dsi->conn);
884 return ret;
885 }
886
887 static int mtk_dsi_create_conn_enc(struct drm_device *drm, struct mtk_dsi *dsi)
888 {
889 int ret;
890
891 ret = drm_encoder_init(drm, &dsi->encoder, &mtk_dsi_encoder_funcs,
892 DRM_MODE_ENCODER_DSI, NULL);
893 if (ret) {
894 DRM_ERROR("Failed to encoder init to drm\n");
895 return ret;
896 }
897 drm_encoder_helper_add(&dsi->encoder, &mtk_dsi_encoder_helper_funcs);
898
899 /*
900 * Currently display data paths are statically assigned to a crtc each.
901 * crtc 0 is OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0
902 */
903 dsi->encoder.possible_crtcs = 1;
904
905 /* If there's a bridge, attach to it and let it create the connector */
906 if (dsi->bridge) {
907 ret = drm_bridge_attach(&dsi->encoder, dsi->bridge, NULL);
908 if (ret) {
909 DRM_ERROR("Failed to attach bridge to drm\n");
910 goto err_encoder_cleanup;
911 }
912 } else {
913 /* Otherwise create our own connector and attach to a panel */
914 ret = mtk_dsi_create_connector(drm, dsi);
915 if (ret)
916 goto err_encoder_cleanup;
917 }
918
919 return 0;
920
921 err_encoder_cleanup:
922 drm_encoder_cleanup(&dsi->encoder);
923 return ret;
924 }
925
926 static void mtk_dsi_destroy_conn_enc(struct mtk_dsi *dsi)
927 {
928 drm_encoder_cleanup(&dsi->encoder);
929 /* Skip connector cleanup if creation was delegated to the bridge */
930 if (dsi->conn.dev)
931 drm_connector_cleanup(&dsi->conn);
932 if (dsi->panel)
933 drm_panel_detach(dsi->panel);
934 }
935
936 static void mtk_dsi_ddp_start(struct mtk_ddp_comp *comp)
937 {
938 struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp);
939
940 mtk_dsi_poweron(dsi);
941 }
942
943 static void mtk_dsi_ddp_stop(struct mtk_ddp_comp *comp)
944 {
945 struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp);
946
947 mtk_dsi_poweroff(dsi);
948 }
949
950 static const struct mtk_ddp_comp_funcs mtk_dsi_funcs = {
951 .start = mtk_dsi_ddp_start,
952 .stop = mtk_dsi_ddp_stop,
953 };
954
955 static int mtk_dsi_host_attach(struct mipi_dsi_host *host,
956 struct mipi_dsi_device *device)
957 {
958 struct mtk_dsi *dsi = host_to_dsi(host);
959
960 dsi->lanes = device->lanes;
961 dsi->format = device->format;
962 dsi->mode_flags = device->mode_flags;
963
964 if (dsi->conn.dev)
965 drm_helper_hpd_irq_event(dsi->conn.dev);
966
967 return 0;
968 }
969
970 static int mtk_dsi_host_detach(struct mipi_dsi_host *host,
971 struct mipi_dsi_device *device)
972 {
973 struct mtk_dsi *dsi = host_to_dsi(host);
974
975 if (dsi->conn.dev)
976 drm_helper_hpd_irq_event(dsi->conn.dev);
977
978 return 0;
979 }
980
981 static void mtk_dsi_wait_for_idle(struct mtk_dsi *dsi)
982 {
983 int ret;
984 u32 val;
985
986 ret = readl_poll_timeout(dsi->regs + DSI_INTSTA, val, !(val & DSI_BUSY),
987 4, 2000000);
988 if (ret) {
989 DRM_WARN("polling dsi wait not busy timeout!\n");
990
991 mtk_dsi_enable(dsi);
992 mtk_dsi_reset_engine(dsi);
993 }
994 }
995
996 static u32 mtk_dsi_recv_cnt(u8 type, u8 *read_data)
997 {
998 switch (type) {
999 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
1000 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
1001 return 1;
1002 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
1003 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
1004 return 2;
1005 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
1006 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
1007 return read_data[1] + read_data[2] * 16;
1008 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
1009 DRM_INFO("type is 0x02, try again\n");
1010 break;
1011 default:
1012 DRM_INFO("type(0x%x) not recognized\n", type);
1013 break;
1014 }
1015
1016 return 0;
1017 }
1018
1019 static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)
1020 {
1021 const char *tx_buf = msg->tx_buf;
1022 u8 config, cmdq_size, cmdq_off, type = msg->type;
1023 u32 reg_val, cmdq_mask, i;
1024 u32 reg_cmdq_off = dsi->driver_data->reg_cmdq_off;
1025
1026 if (MTK_DSI_HOST_IS_READ(type))
1027 config = BTA;
1028 else
1029 config = (msg->tx_len > 2) ? LONG_PACKET : SHORT_PACKET;
1030
1031 if (msg->tx_len > 2) {
1032 cmdq_size = 1 + (msg->tx_len + 3) / 4;
1033 cmdq_off = 4;
1034 cmdq_mask = CONFIG | DATA_ID | DATA_0 | DATA_1;
1035 reg_val = (msg->tx_len << 16) | (type << 8) | config;
1036 } else {
1037 cmdq_size = 1;
1038 cmdq_off = 2;
1039 cmdq_mask = CONFIG | DATA_ID;
1040 reg_val = (type << 8) | config;
1041 }
1042
1043 for (i = 0; i < msg->tx_len; i++)
1044 mtk_dsi_mask(dsi, (reg_cmdq_off + cmdq_off + i) & (~0x3U),
1045 (0xffUL << (((i + cmdq_off) & 3U) * 8U)),
1046 tx_buf[i] << (((i + cmdq_off) & 3U) * 8U));
1047
1048 mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
1049 mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
1050 }
1051
1052 static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
1053 const struct mipi_dsi_msg *msg, u8 flag)
1054 {
1055 mtk_dsi_wait_for_idle(dsi);
1056 mtk_dsi_irq_data_clear(dsi, flag);
1057 mtk_dsi_cmdq(dsi, msg);
1058 mtk_dsi_start(dsi);
1059
1060 if (!mtk_dsi_wait_for_irq_done(dsi, flag, 2000))
1061 return -ETIME;
1062 else
1063 return 0;
1064 }
1065
1066 static ssize_t mtk_dsi_host_transfer(struct mipi_dsi_host *host,
1067 const struct mipi_dsi_msg *msg)
1068 {
1069 struct mtk_dsi *dsi = host_to_dsi(host);
1070 u32 recv_cnt, i;
1071 u8 read_data[16];
1072 void *src_addr;
1073 u8 irq_flag = CMD_DONE_INT_FLAG;
1074
1075 if (readl(dsi->regs + DSI_MODE_CTRL) & MODE) {
1076 DRM_ERROR("dsi engine is not command mode\n");
1077 return -EINVAL;
1078 }
1079
1080 if (MTK_DSI_HOST_IS_READ(msg->type))
1081 irq_flag |= LPRX_RD_RDY_INT_FLAG;
1082
1083 if (mtk_dsi_host_send_cmd(dsi, msg, irq_flag) < 0)
1084 return -ETIME;
1085
1086 if (!MTK_DSI_HOST_IS_READ(msg->type))
1087 return 0;
1088
1089 if (!msg->rx_buf) {
1090 DRM_ERROR("dsi receive buffer size may be NULL\n");
1091 return -EINVAL;
1092 }
1093
1094 for (i = 0; i < 16; i++)
1095 *(read_data + i) = readb(dsi->regs + DSI_RX_DATA0 + i);
1096
1097 recv_cnt = mtk_dsi_recv_cnt(read_data[0], read_data);
1098
1099 if (recv_cnt > 2)
1100 src_addr = &read_data[4];
1101 else
1102 src_addr = &read_data[1];
1103
1104 if (recv_cnt > 10)
1105 recv_cnt = 10;
1106
1107 if (recv_cnt > msg->rx_len)
1108 recv_cnt = msg->rx_len;
1109
1110 if (recv_cnt)
1111 memcpy(msg->rx_buf, src_addr, recv_cnt);
1112
1113 DRM_INFO("dsi get %d byte data from the panel address(0x%x)\n",
1114 recv_cnt, *((u8 *)(msg->tx_buf)));
1115
1116 return recv_cnt;
1117 }
1118
1119 static const struct mipi_dsi_host_ops mtk_dsi_ops = {
1120 .attach = mtk_dsi_host_attach,
1121 .detach = mtk_dsi_host_detach,
1122 .transfer = mtk_dsi_host_transfer,
1123 };
1124
1125 static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
1126 {
1127 int ret;
1128 struct drm_device *drm = data;
1129 struct mtk_dsi *dsi = dev_get_drvdata(dev);
1130
1131 ret = mtk_ddp_comp_register(drm, &dsi->ddp_comp);
1132 if (ret < 0) {
1133 dev_err(dev, "Failed to register component %pOF: %d\n",
1134 dev->of_node, ret);
1135 return ret;
1136 }
1137
1138 ret = mtk_dsi_create_conn_enc(drm, dsi);
1139 if (ret) {
1140 DRM_ERROR("Encoder create failed with %d\n", ret);
1141 goto err_unregister;
1142 }
1143
1144 return 0;
1145
1146 err_unregister:
1147 mtk_ddp_comp_unregister(drm, &dsi->ddp_comp);
1148 return ret;
1149 }
1150
1151 static void mtk_dsi_unbind(struct device *dev, struct device *master,
1152 void *data)
1153 {
1154 struct drm_device *drm = data;
1155 struct mtk_dsi *dsi = dev_get_drvdata(dev);
1156
1157 mtk_dsi_destroy_conn_enc(dsi);
1158 mtk_ddp_comp_unregister(drm, &dsi->ddp_comp);
1159 }
1160
1161 static const struct component_ops mtk_dsi_component_ops = {
1162 .bind = mtk_dsi_bind,
1163 .unbind = mtk_dsi_unbind,
1164 };
1165
1166 static int mtk_dsi_probe(struct platform_device *pdev)
1167 {
1168 struct mtk_dsi *dsi;
1169 struct device *dev = &pdev->dev;
1170 struct resource *regs;
1171 int irq_num;
1172 int comp_id;
1173 int ret;
1174
1175 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
1176 if (!dsi)
1177 return -ENOMEM;
1178
1179 dsi->host.ops = &mtk_dsi_ops;
1180 dsi->host.dev = dev;
1181 ret = mipi_dsi_host_register(&dsi->host);
1182 if (ret < 0) {
1183 dev_err(dev, "failed to register DSI host: %d\n", ret);
1184 return ret;
1185 }
1186
1187 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
1188 &dsi->panel, &dsi->bridge);
1189 if (ret)
1190 goto err_unregister_host;
1191
1192 dsi->driver_data = of_device_get_match_data(dev);
1193
1194 dsi->engine_clk = devm_clk_get(dev, "engine");
1195 if (IS_ERR(dsi->engine_clk)) {
1196 ret = PTR_ERR(dsi->engine_clk);
1197 dev_err(dev, "Failed to get engine clock: %d\n", ret);
1198 goto err_unregister_host;
1199 }
1200
1201 dsi->digital_clk = devm_clk_get(dev, "digital");
1202 if (IS_ERR(dsi->digital_clk)) {
1203 ret = PTR_ERR(dsi->digital_clk);
1204 dev_err(dev, "Failed to get digital clock: %d\n", ret);
1205 goto err_unregister_host;
1206 }
1207
1208 dsi->hs_clk = devm_clk_get(dev, "hs");
1209 if (IS_ERR(dsi->hs_clk)) {
1210 ret = PTR_ERR(dsi->hs_clk);
1211 dev_err(dev, "Failed to get hs clock: %d\n", ret);
1212 goto err_unregister_host;
1213 }
1214
1215 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1216 dsi->regs = devm_ioremap_resource(dev, regs);
1217 if (IS_ERR(dsi->regs)) {
1218 ret = PTR_ERR(dsi->regs);
1219 dev_err(dev, "Failed to ioremap memory: %d\n", ret);
1220 goto err_unregister_host;
1221 }
1222
1223 dsi->phy = devm_phy_get(dev, "dphy");
1224 if (IS_ERR(dsi->phy)) {
1225 ret = PTR_ERR(dsi->phy);
1226 dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret);
1227 goto err_unregister_host;
1228 }
1229
1230 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DSI);
1231 if (comp_id < 0) {
1232 dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
1233 ret = comp_id;
1234 goto err_unregister_host;
1235 }
1236
1237 ret = mtk_ddp_comp_init(dev, dev->of_node, &dsi->ddp_comp, comp_id,
1238 &mtk_dsi_funcs);
1239 if (ret) {
1240 dev_err(dev, "Failed to initialize component: %d\n", ret);
1241 goto err_unregister_host;
1242 }
1243
1244 irq_num = platform_get_irq(pdev, 0);
1245 if (irq_num < 0) {
1246 dev_err(&pdev->dev, "failed to get dsi irq_num: %d\n", irq_num);
1247 ret = irq_num;
1248 goto err_unregister_host;
1249 }
1250
1251 irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW);
1252 ret = devm_request_irq(&pdev->dev, irq_num, mtk_dsi_irq,
1253 IRQF_TRIGGER_LOW, dev_name(&pdev->dev), dsi);
1254 if (ret) {
1255 dev_err(&pdev->dev, "failed to request mediatek dsi irq\n");
1256 goto err_unregister_host;
1257 }
1258
1259 init_waitqueue_head(&dsi->irq_wait_queue);
1260
1261 platform_set_drvdata(pdev, dsi);
1262
1263 ret = component_add(&pdev->dev, &mtk_dsi_component_ops);
1264 if (ret) {
1265 dev_err(&pdev->dev, "failed to add component: %d\n", ret);
1266 goto err_unregister_host;
1267 }
1268
1269 return 0;
1270
1271 err_unregister_host:
1272 mipi_dsi_host_unregister(&dsi->host);
1273 return ret;
1274 }
1275
1276 static int mtk_dsi_remove(struct platform_device *pdev)
1277 {
1278 struct mtk_dsi *dsi = platform_get_drvdata(pdev);
1279
1280 mtk_output_dsi_disable(dsi);
1281 component_del(&pdev->dev, &mtk_dsi_component_ops);
1282 mipi_dsi_host_unregister(&dsi->host);
1283
1284 return 0;
1285 }
1286
1287 static const struct mtk_dsi_driver_data mt8173_dsi_driver_data = {
1288 .reg_cmdq_off = 0x200,
1289 };
1290
1291 static const struct mtk_dsi_driver_data mt2701_dsi_driver_data = {
1292 .reg_cmdq_off = 0x180,
1293 };
1294
1295 static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {
1296 .reg_cmdq_off = 0x200,
1297 .has_shadow_ctl = true,
1298 .has_size_ctl = true,
1299 };
1300
1301 static const struct of_device_id mtk_dsi_of_match[] = {
1302 { .compatible = "mediatek,mt2701-dsi",
1303 .data = &mt2701_dsi_driver_data },
1304 { .compatible = "mediatek,mt8173-dsi",
1305 .data = &mt8173_dsi_driver_data },
1306 { .compatible = "mediatek,mt8183-dsi",
1307 .data = &mt8183_dsi_driver_data },
1308 { },
1309 };
1310
1311 struct platform_driver mtk_dsi_driver = {
1312 .probe = mtk_dsi_probe,
1313 .remove = mtk_dsi_remove,
1314 .driver = {
1315 .name = "mtk-dsi",
1316 .of_match_table = mtk_dsi_of_match,
1317 },
1318 };
Linux with added FPC-III support