1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * camss.c
4  *
5  * Qualcomm MSM Camera Subsystem - Core
6  *
7  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
8  * Copyright (C) 2015-2018 Linaro Ltd.
9  */
10 #include <linux/clk.h>
11 #include <linux/interconnect.h>
12 #include <linux/media-bus-format.h>
13 #include <linux/media.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/of.h>
17 #include <linux/of_graph.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/pm_domain.h>
20 #include <linux/slab.h>
21 #include <linux/videodev2.h>
22 
23 #include <media/media-device.h>
24 #include <media/v4l2-async.h>
25 #include <media/v4l2-device.h>
26 #include <media/v4l2-mc.h>
27 #include <media/v4l2-fwnode.h>
28 
29 #include "camss.h"
30 
31 #define CAMSS_CLOCK_MARGIN_NUMERATOR 105
32 #define CAMSS_CLOCK_MARGIN_DENOMINATOR 100
33 
34 static const struct resources csiphy_res_8x16[] = {
35 	/* CSIPHY0 */
36 	{
37 		.regulators = {},
38 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy0_timer" },
39 		.clock_rate = { { 0 },
40 				{ 0 },
41 				{ 0 },
42 				{ 100000000, 200000000 } },
43 		.reg = { "csiphy0", "csiphy0_clk_mux" },
44 		.interrupt = { "csiphy0" }
45 	},
46 
47 	/* CSIPHY1 */
48 	{
49 		.regulators = {},
50 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy1_timer" },
51 		.clock_rate = { { 0 },
52 				{ 0 },
53 				{ 0 },
54 				{ 100000000, 200000000 } },
55 		.reg = { "csiphy1", "csiphy1_clk_mux" },
56 		.interrupt = { "csiphy1" }
57 	}
58 };
59 
60 static const struct resources csid_res_8x16[] = {
61 	/* CSID0 */
62 	{
63 		.regulators = { "vdda" },
64 		.clock = { "top_ahb", "ispif_ahb", "csi0_ahb", "ahb",
65 			   "csi0", "csi0_phy", "csi0_pix", "csi0_rdi" },
66 		.clock_rate = { { 0 },
67 				{ 0 },
68 				{ 0 },
69 				{ 0 },
70 				{ 100000000, 200000000 },
71 				{ 0 },
72 				{ 0 },
73 				{ 0 } },
74 		.reg = { "csid0" },
75 		.interrupt = { "csid0" }
76 	},
77 
78 	/* CSID1 */
79 	{
80 		.regulators = { "vdda" },
81 		.clock = { "top_ahb", "ispif_ahb", "csi1_ahb", "ahb",
82 			   "csi1", "csi1_phy", "csi1_pix", "csi1_rdi" },
83 		.clock_rate = { { 0 },
84 				{ 0 },
85 				{ 0 },
86 				{ 0 },
87 				{ 100000000, 200000000 },
88 				{ 0 },
89 				{ 0 },
90 				{ 0 } },
91 		.reg = { "csid1" },
92 		.interrupt = { "csid1" }
93 	},
94 };
95 
96 static const struct resources_ispif ispif_res_8x16 = {
97 	/* ISPIF */
98 	.clock = { "top_ahb", "ahb", "ispif_ahb",
99 		   "csi0", "csi0_pix", "csi0_rdi",
100 		   "csi1", "csi1_pix", "csi1_rdi" },
101 	.clock_for_reset = { "vfe0", "csi_vfe0" },
102 	.reg = { "ispif", "csi_clk_mux" },
103 	.interrupt = "ispif"
104 
105 };
106 
107 static const struct resources vfe_res_8x16[] = {
108 	/* VFE0 */
109 	{
110 		.regulators = {},
111 		.clock = { "top_ahb", "vfe0", "csi_vfe0",
112 			   "vfe_ahb", "vfe_axi", "ahb" },
113 		.clock_rate = { { 0 },
114 				{ 50000000, 80000000, 100000000, 160000000,
115 				  177780000, 200000000, 266670000, 320000000,
116 				  400000000, 465000000 },
117 				{ 0 },
118 				{ 0 },
119 				{ 0 },
120 				{ 0 },
121 				{ 0 },
122 				{ 0 },
123 				{ 0 } },
124 		.reg = { "vfe0" },
125 		.interrupt = { "vfe0" }
126 	}
127 };
128 
129 static const struct resources csiphy_res_8x96[] = {
130 	/* CSIPHY0 */
131 	{
132 		.regulators = {},
133 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy0_timer" },
134 		.clock_rate = { { 0 },
135 				{ 0 },
136 				{ 0 },
137 				{ 100000000, 200000000, 266666667 } },
138 		.reg = { "csiphy0", "csiphy0_clk_mux" },
139 		.interrupt = { "csiphy0" }
140 	},
141 
142 	/* CSIPHY1 */
143 	{
144 		.regulators = {},
145 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy1_timer" },
146 		.clock_rate = { { 0 },
147 				{ 0 },
148 				{ 0 },
149 				{ 100000000, 200000000, 266666667 } },
150 		.reg = { "csiphy1", "csiphy1_clk_mux" },
151 		.interrupt = { "csiphy1" }
152 	},
153 
154 	/* CSIPHY2 */
155 	{
156 		.regulators = {},
157 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy2_timer" },
158 		.clock_rate = { { 0 },
159 				{ 0 },
160 				{ 0 },
161 				{ 100000000, 200000000, 266666667 } },
162 		.reg = { "csiphy2", "csiphy2_clk_mux" },
163 		.interrupt = { "csiphy2" }
164 	}
165 };
166 
167 static const struct resources csid_res_8x96[] = {
168 	/* CSID0 */
169 	{
170 		.regulators = { "vdda" },
171 		.clock = { "top_ahb", "ispif_ahb", "csi0_ahb", "ahb",
172 			   "csi0", "csi0_phy", "csi0_pix", "csi0_rdi" },
173 		.clock_rate = { { 0 },
174 				{ 0 },
175 				{ 0 },
176 				{ 0 },
177 				{ 100000000, 200000000, 266666667 },
178 				{ 0 },
179 				{ 0 },
180 				{ 0 } },
181 		.reg = { "csid0" },
182 		.interrupt = { "csid0" }
183 	},
184 
185 	/* CSID1 */
186 	{
187 		.regulators = { "vdda" },
188 		.clock = { "top_ahb", "ispif_ahb", "csi1_ahb", "ahb",
189 			   "csi1", "csi1_phy", "csi1_pix", "csi1_rdi" },
190 		.clock_rate = { { 0 },
191 				{ 0 },
192 				{ 0 },
193 				{ 0 },
194 				{ 100000000, 200000000, 266666667 },
195 				{ 0 },
196 				{ 0 },
197 				{ 0 } },
198 		.reg = { "csid1" },
199 		.interrupt = { "csid1" }
200 	},
201 
202 	/* CSID2 */
203 	{
204 		.regulators = { "vdda" },
205 		.clock = { "top_ahb", "ispif_ahb", "csi2_ahb", "ahb",
206 			   "csi2", "csi2_phy", "csi2_pix", "csi2_rdi" },
207 		.clock_rate = { { 0 },
208 				{ 0 },
209 				{ 0 },
210 				{ 0 },
211 				{ 100000000, 200000000, 266666667 },
212 				{ 0 },
213 				{ 0 },
214 				{ 0 } },
215 		.reg = { "csid2" },
216 		.interrupt = { "csid2" }
217 	},
218 
219 	/* CSID3 */
220 	{
221 		.regulators = { "vdda" },
222 		.clock = { "top_ahb", "ispif_ahb", "csi3_ahb", "ahb",
223 			   "csi3", "csi3_phy", "csi3_pix", "csi3_rdi" },
224 		.clock_rate = { { 0 },
225 				{ 0 },
226 				{ 0 },
227 				{ 0 },
228 				{ 100000000, 200000000, 266666667 },
229 				{ 0 },
230 				{ 0 },
231 				{ 0 } },
232 		.reg = { "csid3" },
233 		.interrupt = { "csid3" }
234 	}
235 };
236 
237 static const struct resources_ispif ispif_res_8x96 = {
238 	/* ISPIF */
239 	.clock = { "top_ahb", "ahb", "ispif_ahb",
240 		   "csi0", "csi0_pix", "csi0_rdi",
241 		   "csi1", "csi1_pix", "csi1_rdi",
242 		   "csi2", "csi2_pix", "csi2_rdi",
243 		   "csi3", "csi3_pix", "csi3_rdi" },
244 	.clock_for_reset = { "vfe0", "csi_vfe0", "vfe1", "csi_vfe1" },
245 	.reg = { "ispif", "csi_clk_mux" },
246 	.interrupt = "ispif"
247 };
248 
249 static const struct resources vfe_res_8x96[] = {
250 	/* VFE0 */
251 	{
252 		.regulators = {},
253 		.clock = { "top_ahb", "ahb", "vfe0", "csi_vfe0", "vfe_ahb",
254 			   "vfe0_ahb", "vfe_axi", "vfe0_stream"},
255 		.clock_rate = { { 0 },
256 				{ 0 },
257 				{ 75000000, 100000000, 300000000,
258 				  320000000, 480000000, 600000000 },
259 				{ 0 },
260 				{ 0 },
261 				{ 0 },
262 				{ 0 },
263 				{ 0 } },
264 		.reg = { "vfe0" },
265 		.interrupt = { "vfe0" }
266 	},
267 
268 	/* VFE1 */
269 	{
270 		.regulators = {},
271 		.clock = { "top_ahb", "ahb", "vfe1", "csi_vfe1", "vfe_ahb",
272 			   "vfe1_ahb", "vfe_axi", "vfe1_stream"},
273 		.clock_rate = { { 0 },
274 				{ 0 },
275 				{ 75000000, 100000000, 300000000,
276 				  320000000, 480000000, 600000000 },
277 				{ 0 },
278 				{ 0 },
279 				{ 0 },
280 				{ 0 },
281 				{ 0 } },
282 		.reg = { "vfe1" },
283 		.interrupt = { "vfe1" }
284 	}
285 };
286 
287 static const struct resources csiphy_res_660[] = {
288 	/* CSIPHY0 */
289 	{
290 		.regulators = {},
291 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy0_timer",
292 			   "csi0_phy", "csiphy_ahb2crif" },
293 		.clock_rate = { { 0 },
294 				{ 0 },
295 				{ 0 },
296 				{ 100000000, 200000000, 269333333 },
297 				{ 0 } },
298 		.reg = { "csiphy0", "csiphy0_clk_mux" },
299 		.interrupt = { "csiphy0" }
300 	},
301 
302 	/* CSIPHY1 */
303 	{
304 		.regulators = {},
305 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy1_timer",
306 			   "csi1_phy", "csiphy_ahb2crif" },
307 		.clock_rate = { { 0 },
308 				{ 0 },
309 				{ 0 },
310 				{ 100000000, 200000000, 269333333 },
311 				{ 0 } },
312 		.reg = { "csiphy1", "csiphy1_clk_mux" },
313 		.interrupt = { "csiphy1" }
314 	},
315 
316 	/* CSIPHY2 */
317 	{
318 		.regulators = {},
319 		.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy2_timer",
320 			   "csi2_phy", "csiphy_ahb2crif" },
321 		.clock_rate = { { 0 },
322 				{ 0 },
323 				{ 0 },
324 				{ 100000000, 200000000, 269333333 },
325 				{ 0 } },
326 		.reg = { "csiphy2", "csiphy2_clk_mux" },
327 		.interrupt = { "csiphy2" }
328 	}
329 };
330 
331 static const struct resources csid_res_660[] = {
332 	/* CSID0 */
333 	{
334 		.regulators = { "vdda", "vdd_sec" },
335 		.clock = { "top_ahb", "ispif_ahb", "csi0_ahb", "ahb",
336 			   "csi0", "csi0_phy", "csi0_pix", "csi0_rdi",
337 			   "cphy_csid0" },
338 		.clock_rate = { { 0 },
339 				{ 0 },
340 				{ 0 },
341 				{ 0 },
342 				{ 100000000, 200000000, 310000000,
343 				  404000000, 465000000 },
344 				{ 0 },
345 				{ 0 },
346 				{ 0 },
347 				{ 0 } },
348 		.reg = { "csid0" },
349 		.interrupt = { "csid0" }
350 	},
351 
352 	/* CSID1 */
353 	{
354 		.regulators = { "vdda", "vdd_sec" },
355 		.clock = { "top_ahb", "ispif_ahb", "csi1_ahb", "ahb",
356 			   "csi1", "csi1_phy", "csi1_pix", "csi1_rdi",
357 			   "cphy_csid1" },
358 		.clock_rate = { { 0 },
359 				{ 0 },
360 				{ 0 },
361 				{ 0 },
362 				{ 100000000, 200000000, 310000000,
363 				  404000000, 465000000 },
364 				{ 0 },
365 				{ 0 },
366 				{ 0 },
367 				{ 0 } },
368 		.reg = { "csid1" },
369 		.interrupt = { "csid1" }
370 	},
371 
372 	/* CSID2 */
373 	{
374 		.regulators = { "vdda", "vdd_sec" },
375 		.clock = { "top_ahb", "ispif_ahb", "csi2_ahb", "ahb",
376 			   "csi2", "csi2_phy", "csi2_pix", "csi2_rdi",
377 			   "cphy_csid2" },
378 		.clock_rate = { { 0 },
379 				{ 0 },
380 				{ 0 },
381 				{ 0 },
382 				{ 100000000, 200000000, 310000000,
383 				  404000000, 465000000 },
384 				{ 0 },
385 				{ 0 },
386 				{ 0 },
387 				{ 0 } },
388 		.reg = { "csid2" },
389 		.interrupt = { "csid2" }
390 	},
391 
392 	/* CSID3 */
393 	{
394 		.regulators = { "vdda", "vdd_sec" },
395 		.clock = { "top_ahb", "ispif_ahb", "csi3_ahb", "ahb",
396 			   "csi3", "csi3_phy", "csi3_pix", "csi3_rdi",
397 			   "cphy_csid3" },
398 		.clock_rate = { { 0 },
399 				{ 0 },
400 				{ 0 },
401 				{ 0 },
402 				{ 100000000, 200000000, 310000000,
403 				  404000000, 465000000 },
404 				{ 0 },
405 				{ 0 },
406 				{ 0 },
407 				{ 0 } },
408 		.reg = { "csid3" },
409 		.interrupt = { "csid3" }
410 	}
411 };
412 
413 static const struct resources_ispif ispif_res_660 = {
414 	/* ISPIF */
415 	.clock = { "top_ahb", "ahb", "ispif_ahb",
416 		   "csi0", "csi0_pix", "csi0_rdi",
417 		   "csi1", "csi1_pix", "csi1_rdi",
418 		   "csi2", "csi2_pix", "csi2_rdi",
419 		   "csi3", "csi3_pix", "csi3_rdi" },
420 	.clock_for_reset = { "vfe0", "csi_vfe0", "vfe1", "csi_vfe1" },
421 	.reg = { "ispif", "csi_clk_mux" },
422 	.interrupt = "ispif"
423 };
424 
425 static const struct resources vfe_res_660[] = {
426 	/* VFE0 */
427 	{
428 		.regulators = {},
429 		.clock = { "throttle_axi", "top_ahb", "ahb", "vfe0",
430 			   "csi_vfe0", "vfe_ahb", "vfe0_ahb", "vfe_axi",
431 			   "vfe0_stream"},
432 		.clock_rate = { { 0 },
433 				{ 0 },
434 				{ 0 },
435 				{ 120000000, 200000000, 256000000,
436 				  300000000, 404000000, 480000000,
437 				  540000000, 576000000 },
438 				{ 0 },
439 				{ 0 },
440 				{ 0 },
441 				{ 0 },
442 				{ 0 } },
443 		.reg = { "vfe0" },
444 		.interrupt = { "vfe0" }
445 	},
446 
447 	/* VFE1 */
448 	{
449 		.regulators = {},
450 		.clock = { "throttle_axi", "top_ahb", "ahb", "vfe1",
451 			   "csi_vfe1", "vfe_ahb", "vfe1_ahb", "vfe_axi",
452 			   "vfe1_stream"},
453 		.clock_rate = { { 0 },
454 				{ 0 },
455 				{ 0 },
456 				{ 120000000, 200000000, 256000000,
457 				  300000000, 404000000, 480000000,
458 				  540000000, 576000000 },
459 				{ 0 },
460 				{ 0 },
461 				{ 0 },
462 				{ 0 },
463 				{ 0 } },
464 		.reg = { "vfe1" },
465 		.interrupt = { "vfe1" }
466 	}
467 };
468 
469 static const struct resources csiphy_res_845[] = {
470 	/* CSIPHY0 */
471 	{
472 		.regulators = {},
473 		.clock = { "camnoc_axi", "soc_ahb", "slow_ahb_src",
474 				"cpas_ahb", "cphy_rx_src", "csiphy0",
475 				"csiphy0_timer_src", "csiphy0_timer" },
476 		.clock_rate = { { 0 },
477 				{ 0 },
478 				{ 0 },
479 				{ 0 },
480 				{ 0 },
481 				{ 0 },
482 				{ 0 },
483 				{ 19200000, 240000000, 269333333 } },
484 		.reg = { "csiphy0" },
485 		.interrupt = { "csiphy0" }
486 	},
487 
488 	/* CSIPHY1 */
489 	{
490 		.regulators = {},
491 		.clock = { "camnoc_axi", "soc_ahb", "slow_ahb_src",
492 				"cpas_ahb", "cphy_rx_src", "csiphy1",
493 				"csiphy1_timer_src", "csiphy1_timer" },
494 		.clock_rate = { { 0 },
495 				{ 0 },
496 				{ 0 },
497 				{ 0 },
498 				{ 0 },
499 				{ 0 },
500 				{ 0 },
501 				{ 19200000, 240000000, 269333333 } },
502 		.reg = { "csiphy1" },
503 		.interrupt = { "csiphy1" }
504 	},
505 
506 	/* CSIPHY2 */
507 	{
508 		.regulators = {},
509 		.clock = { "camnoc_axi", "soc_ahb", "slow_ahb_src",
510 				"cpas_ahb", "cphy_rx_src", "csiphy2",
511 				"csiphy2_timer_src", "csiphy2_timer" },
512 		.clock_rate = { { 0 },
513 				{ 0 },
514 				{ 0 },
515 				{ 0 },
516 				{ 0 },
517 				{ 0 },
518 				{ 0 },
519 				{ 19200000, 240000000, 269333333 } },
520 		.reg = { "csiphy2" },
521 		.interrupt = { "csiphy2" }
522 	},
523 
524 	/* CSIPHY3 */
525 	{
526 		.regulators = {},
527 		.clock = { "camnoc_axi", "soc_ahb", "slow_ahb_src",
528 				"cpas_ahb", "cphy_rx_src", "csiphy3",
529 				"csiphy3_timer_src", "csiphy3_timer" },
530 		.clock_rate = { { 0 },
531 				{ 0 },
532 				{ 0 },
533 				{ 0 },
534 				{ 0 },
535 				{ 0 },
536 				{ 0 },
537 				{ 19200000, 240000000, 269333333 } },
538 		.reg = { "csiphy3" },
539 		.interrupt = { "csiphy3" }
540 	}
541 };
542 
543 static const struct resources csid_res_845[] = {
544 	/* CSID0 */
545 	{
546 		.regulators = { "vdda-phy", "vdda-pll" },
547 		.clock = { "cpas_ahb", "cphy_rx_src", "slow_ahb_src",
548 				"soc_ahb", "vfe0", "vfe0_src",
549 				"vfe0_cphy_rx", "csi0",
550 				"csi0_src" },
551 		.clock_rate = { { 0 },
552 				{ 384000000 },
553 				{ 80000000 },
554 				{ 0 },
555 				{ 19200000, 100000000, 320000000, 404000000, 480000000, 600000000 },
556 				{ 320000000 },
557 				{ 0 },
558 				{ 19200000, 75000000, 384000000, 538666667 },
559 				{ 384000000 } },
560 		.reg = { "csid0" },
561 		.interrupt = { "csid0" }
562 	},
563 
564 	/* CSID1 */
565 	{
566 		.regulators = { "vdda-phy", "vdda-pll" },
567 		.clock = { "cpas_ahb", "cphy_rx_src", "slow_ahb_src",
568 				"soc_ahb", "vfe1", "vfe1_src",
569 				"vfe1_cphy_rx", "csi1",
570 				"csi1_src" },
571 		.clock_rate = { { 0 },
572 				{ 384000000 },
573 				{ 80000000 },
574 				{ 0 },
575 				{ 19200000, 100000000, 320000000, 404000000, 480000000, 600000000 },
576 				{ 320000000 },
577 				{ 0 },
578 				{ 19200000, 75000000, 384000000, 538666667 },
579 				{ 384000000 } },
580 		.reg = { "csid1" },
581 		.interrupt = { "csid1" }
582 	},
583 
584 	/* CSID2 */
585 	{
586 		.regulators = { "vdda-phy", "vdda-pll" },
587 		.clock = { "cpas_ahb", "cphy_rx_src", "slow_ahb_src",
588 				"soc_ahb", "vfe_lite", "vfe_lite_src",
589 				"vfe_lite_cphy_rx", "csi2",
590 				"csi2_src" },
591 		.clock_rate = { { 0 },
592 				{ 384000000 },
593 				{ 80000000 },
594 				{ 0 },
595 				{ 19200000, 100000000, 320000000, 404000000, 480000000, 600000000 },
596 				{ 320000000 },
597 				{ 0 },
598 				{ 19200000, 75000000, 384000000, 538666667 },
599 				{ 384000000 } },
600 		.reg = { "csid2" },
601 		.interrupt = { "csid2" }
602 	}
603 };
604 
605 static const struct resources vfe_res_845[] = {
606 	/* VFE0 */
607 	{
608 		.regulators = {},
609 		.clock = { "camnoc_axi", "cpas_ahb", "slow_ahb_src",
610 				"soc_ahb", "vfe0", "vfe0_axi",
611 				"vfe0_src", "csi0",
612 				"csi0_src"},
613 		.clock_rate = { { 0 },
614 				{ 0 },
615 				{ 80000000 },
616 				{ 0 },
617 				{ 19200000, 100000000, 320000000, 404000000, 480000000, 600000000 },
618 				{ 0 },
619 				{ 320000000 },
620 				{ 19200000, 75000000, 384000000, 538666667 },
621 				{ 384000000 } },
622 		.reg = { "vfe0" },
623 		.interrupt = { "vfe0" }
624 	},
625 
626 	/* VFE1 */
627 	{
628 		.regulators = {},
629 		.clock = { "camnoc_axi", "cpas_ahb", "slow_ahb_src",
630 				"soc_ahb", "vfe1", "vfe1_axi",
631 				"vfe1_src", "csi1",
632 				"csi1_src"},
633 		.clock_rate = { { 0 },
634 				{ 0 },
635 				{ 80000000 },
636 				{ 0 },
637 				{ 19200000, 100000000, 320000000, 404000000, 480000000, 600000000 },
638 				{ 0 },
639 				{ 320000000 },
640 				{ 19200000, 75000000, 384000000, 538666667 },
641 				{ 384000000 } },
642 		.reg = { "vfe1" },
643 		.interrupt = { "vfe1" }
644 	},
645 
646 	/* VFE-lite */
647 	{
648 		.regulators = {},
649 		.clock = { "camnoc_axi", "cpas_ahb", "slow_ahb_src",
650 				"soc_ahb", "vfe_lite",
651 				"vfe_lite_src", "csi2",
652 				"csi2_src"},
653 		.clock_rate = { { 0 },
654 				{ 0 },
655 				{ 80000000 },
656 				{ 0 },
657 				{ 19200000, 100000000, 320000000, 404000000, 480000000, 600000000 },
658 				{ 320000000 },
659 				{ 19200000, 75000000, 384000000, 538666667 },
660 				{ 384000000 } },
661 		.reg = { "vfe_lite" },
662 		.interrupt = { "vfe_lite" }
663 	}
664 };
665 
666 static const struct resources csiphy_res_8250[] = {
667 	/* CSIPHY0 */
668 	{
669 		.regulators = {},
670 		.clock = { "csiphy0", "csiphy0_timer" },
671 		.clock_rate = { { 400000000 },
672 				{ 300000000 } },
673 		.reg = { "csiphy0" },
674 		.interrupt = { "csiphy0" }
675 	},
676 	/* CSIPHY1 */
677 	{
678 		.regulators = {},
679 		.clock = { "csiphy1", "csiphy1_timer" },
680 		.clock_rate = { { 400000000 },
681 				{ 300000000 } },
682 		.reg = { "csiphy1" },
683 		.interrupt = { "csiphy1" }
684 	},
685 	/* CSIPHY2 */
686 	{
687 		.regulators = {},
688 		.clock = { "csiphy2", "csiphy2_timer" },
689 		.clock_rate = { { 400000000 },
690 				{ 300000000 } },
691 		.reg = { "csiphy2" },
692 		.interrupt = { "csiphy2" }
693 	},
694 	/* CSIPHY3 */
695 	{
696 		.regulators = {},
697 		.clock = { "csiphy3", "csiphy3_timer" },
698 		.clock_rate = { { 400000000 },
699 				{ 300000000 } },
700 		.reg = { "csiphy3" },
701 		.interrupt = { "csiphy3" }
702 	},
703 	/* CSIPHY4 */
704 	{
705 		.regulators = {},
706 		.clock = { "csiphy4", "csiphy4_timer" },
707 		.clock_rate = { { 400000000 },
708 				{ 300000000 } },
709 		.reg = { "csiphy4" },
710 		.interrupt = { "csiphy4" }
711 	},
712 	/* CSIPHY5 */
713 	{
714 		.regulators = {},
715 		.clock = { "csiphy5", "csiphy5_timer" },
716 		.clock_rate = { { 400000000 },
717 				{ 300000000 } },
718 		.reg = { "csiphy5" },
719 		.interrupt = { "csiphy5" }
720 	}
721 };
722 
723 static const struct resources csid_res_8250[] = {
724 	/* CSID0 */
725 	{
726 		.regulators = { "vdda-phy", "vdda-pll" },
727 		.clock = { "vfe0_csid", "vfe0_cphy_rx", "vfe0", "vfe0_areg", "vfe0_ahb" },
728 		.clock_rate = { { 400000000 },
729 				{ 400000000 },
730 				{ 350000000, 475000000, 576000000, 720000000 },
731 				{ 100000000, 200000000, 300000000, 400000000 },
732 				{ 0 } },
733 		.reg = { "csid0" },
734 		.interrupt = { "csid0" }
735 	},
736 	/* CSID1 */
737 	{
738 		.regulators = { "vdda-phy", "vdda-pll" },
739 		.clock = { "vfe1_csid", "vfe1_cphy_rx", "vfe1", "vfe1_areg", "vfe1_ahb" },
740 		.clock_rate = { { 400000000 },
741 				{ 400000000 },
742 				{ 350000000, 475000000, 576000000, 720000000 },
743 				{ 100000000, 200000000, 300000000, 400000000 },
744 				{ 0 } },
745 		.reg = { "csid1" },
746 		.interrupt = { "csid1" }
747 	},
748 	/* CSID2 */
749 	{
750 		.regulators = { "vdda-phy", "vdda-pll" },
751 		.clock = { "vfe_lite_csid", "vfe_lite_cphy_rx", "vfe_lite",  "vfe_lite_ahb" },
752 		.clock_rate = { { 400000000 },
753 				{ 400000000 },
754 				{ 400000000, 480000000 },
755 				{ 0 } },
756 		.reg = { "csid2" },
757 		.interrupt = { "csid2" }
758 	},
759 	/* CSID3 */
760 	{
761 		.regulators = { "vdda-phy", "vdda-pll" },
762 		.clock = { "vfe_lite_csid", "vfe_lite_cphy_rx", "vfe_lite",  "vfe_lite_ahb" },
763 		.clock_rate = { { 400000000 },
764 				{ 400000000 },
765 				{ 400000000, 480000000 },
766 				{ 0 } },
767 		.reg = { "csid3" },
768 		.interrupt = { "csid3" }
769 	}
770 };
771 
772 static const struct resources vfe_res_8250[] = {
773 	/* VFE0 */
774 	{
775 		.regulators = {},
776 		.clock = { "camnoc_axi_src", "slow_ahb_src", "cpas_ahb",
777 			   "camnoc_axi", "vfe0_ahb", "vfe0_areg", "vfe0",
778 			   "vfe0_axi", "cam_hf_axi" },
779 		.clock_rate = { { 19200000, 300000000, 400000000, 480000000 },
780 				{ 19200000, 80000000 },
781 				{ 19200000 },
782 				{ 0 },
783 				{ 0 },
784 				{ 100000000, 200000000, 300000000, 400000000 },
785 				{ 350000000, 475000000, 576000000, 720000000 },
786 				{ 0 },
787 				{ 0 } },
788 		.reg = { "vfe0" },
789 		.interrupt = { "vfe0" }
790 	},
791 	/* VFE1 */
792 	{
793 		.regulators = {},
794 		.clock = { "camnoc_axi_src", "slow_ahb_src", "cpas_ahb",
795 			   "camnoc_axi", "vfe1_ahb", "vfe1_areg", "vfe1",
796 			   "vfe1_axi", "cam_hf_axi" },
797 		.clock_rate = { { 19200000, 300000000, 400000000, 480000000 },
798 				{ 19200000, 80000000 },
799 				{ 19200000 },
800 				{ 0 },
801 				{ 0 },
802 				{ 100000000, 200000000, 300000000, 400000000 },
803 				{ 350000000, 475000000, 576000000, 720000000 },
804 				{ 0 },
805 				{ 0 } },
806 		.reg = { "vfe1" },
807 		.interrupt = { "vfe1" }
808 	},
809 	/* VFE2 (lite) */
810 	{
811 		.regulators = {},
812 		.clock = { "camnoc_axi_src", "slow_ahb_src", "cpas_ahb",
813 			   "camnoc_axi", "vfe_lite_ahb", "vfe_lite_axi",
814 			   "vfe_lite", "cam_hf_axi" },
815 		.clock_rate = { { 19200000, 300000000, 400000000, 480000000 },
816 				{ 19200000, 80000000 },
817 				{ 19200000 },
818 				{ 0 },
819 				{ 0 },
820 				{ 0 },
821 				{ 400000000, 480000000 },
822 				{ 0 } },
823 		.reg = { "vfe_lite0" },
824 		.interrupt = { "vfe_lite0" }
825 	},
826 	/* VFE3 (lite) */
827 	{
828 		.regulators = {},
829 		.clock = { "camnoc_axi_src", "slow_ahb_src", "cpas_ahb",
830 			   "camnoc_axi", "vfe_lite_ahb", "vfe_lite_axi",
831 			   "vfe_lite", "cam_hf_axi" },
832 		.clock_rate = { { 19200000, 300000000, 400000000, 480000000 },
833 				{ 19200000, 80000000 },
834 				{ 19200000 },
835 				{ 0 },
836 				{ 0 },
837 				{ 0 },
838 				{ 400000000, 480000000 },
839 				{ 0 } },
840 		.reg = { "vfe_lite1" },
841 		.interrupt = { "vfe_lite1" }
842 	},
843 };
844 
845 static const struct resources_icc icc_res_sm8250[] = {
846 	{
847 		.name = "cam_ahb",
848 		.icc_bw_tbl.avg = 38400,
849 		.icc_bw_tbl.peak = 76800,
850 	},
851 	{
852 		.name = "cam_hf_0_mnoc",
853 		.icc_bw_tbl.avg = 2097152,
854 		.icc_bw_tbl.peak = 2097152,
855 	},
856 	{
857 		.name = "cam_sf_0_mnoc",
858 		.icc_bw_tbl.avg = 0,
859 		.icc_bw_tbl.peak = 2097152,
860 	},
861 	{
862 		.name = "cam_sf_icp_mnoc",
863 		.icc_bw_tbl.avg = 2097152,
864 		.icc_bw_tbl.peak = 2097152,
865 	},
866 };
867 
868 /*
869  * camss_add_clock_margin - Add margin to clock frequency rate
870  * @rate: Clock frequency rate
871  *
872  * When making calculations with physical clock frequency values
873  * some safety margin must be added. Add it.
874  */
875 inline void camss_add_clock_margin(u64 *rate)
876 {
877 	*rate *= CAMSS_CLOCK_MARGIN_NUMERATOR;
878 	*rate = div_u64(*rate, CAMSS_CLOCK_MARGIN_DENOMINATOR);
879 }
880 
881 /*
882  * camss_enable_clocks - Enable multiple clocks
883  * @nclocks: Number of clocks in clock array
884  * @clock: Clock array
885  * @dev: Device
886  *
887  * Return 0 on success or a negative error code otherwise
888  */
889 int camss_enable_clocks(int nclocks, struct camss_clock *clock,
890 			struct device *dev)
891 {
892 	int ret;
893 	int i;
894 
895 	for (i = 0; i < nclocks; i++) {
896 		ret = clk_prepare_enable(clock[i].clk);
897 		if (ret) {
898 			dev_err(dev, "clock enable failed: %d\n", ret);
899 			goto error;
900 		}
901 	}
902 
903 	return 0;
904 
905 error:
906 	for (i--; i >= 0; i--)
907 		clk_disable_unprepare(clock[i].clk);
908 
909 	return ret;
910 }
911 
912 /*
913  * camss_disable_clocks - Disable multiple clocks
914  * @nclocks: Number of clocks in clock array
915  * @clock: Clock array
916  */
917 void camss_disable_clocks(int nclocks, struct camss_clock *clock)
918 {
919 	int i;
920 
921 	for (i = nclocks - 1; i >= 0; i--)
922 		clk_disable_unprepare(clock[i].clk);
923 }
924 
925 /*
926  * camss_find_sensor - Find a linked media entity which represents a sensor
927  * @entity: Media entity to start searching from
928  *
929  * Return a pointer to sensor media entity or NULL if not found
930  */
931 struct media_entity *camss_find_sensor(struct media_entity *entity)
932 {
933 	struct media_pad *pad;
934 
935 	while (1) {
936 		pad = &entity->pads[0];
937 		if (!(pad->flags & MEDIA_PAD_FL_SINK))
938 			return NULL;
939 
940 		pad = media_pad_remote_pad_first(pad);
941 		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
942 			return NULL;
943 
944 		entity = pad->entity;
945 
946 		if (entity->function == MEDIA_ENT_F_CAM_SENSOR)
947 			return entity;
948 	}
949 }
950 
951 /**
952  * camss_get_link_freq - Get link frequency from sensor
953  * @entity: Media entity in the current pipeline
954  * @bpp: Number of bits per pixel for the current format
955  * @lanes: Number of lanes in the link to the sensor
956  *
957  * Return link frequency on success or a negative error code otherwise
958  */
959 s64 camss_get_link_freq(struct media_entity *entity, unsigned int bpp,
960 			unsigned int lanes)
961 {
962 	struct media_entity *sensor;
963 	struct v4l2_subdev *subdev;
964 
965 	sensor = camss_find_sensor(entity);
966 	if (!sensor)
967 		return -ENODEV;
968 
969 	subdev = media_entity_to_v4l2_subdev(sensor);
970 
971 	return v4l2_get_link_freq(subdev->ctrl_handler, bpp, 2 * lanes);
972 }
973 
974 /*
975  * camss_get_pixel_clock - Get pixel clock rate from sensor
976  * @entity: Media entity in the current pipeline
977  * @pixel_clock: Received pixel clock value
978  *
979  * Return 0 on success or a negative error code otherwise
980  */
981 int camss_get_pixel_clock(struct media_entity *entity, u64 *pixel_clock)
982 {
983 	struct media_entity *sensor;
984 	struct v4l2_subdev *subdev;
985 	struct v4l2_ctrl *ctrl;
986 
987 	sensor = camss_find_sensor(entity);
988 	if (!sensor)
989 		return -ENODEV;
990 
991 	subdev = media_entity_to_v4l2_subdev(sensor);
992 
993 	ctrl = v4l2_ctrl_find(subdev->ctrl_handler, V4L2_CID_PIXEL_RATE);
994 
995 	if (!ctrl)
996 		return -EINVAL;
997 
998 	*pixel_clock = v4l2_ctrl_g_ctrl_int64(ctrl);
999 
1000 	return 0;
1001 }
1002 
1003 int camss_pm_domain_on(struct camss *camss, int id)
1004 {
1005 	int ret = 0;
1006 
1007 	if (id < camss->vfe_num) {
1008 		struct vfe_device *vfe = &camss->vfe[id];
1009 
1010 		ret = vfe->ops->pm_domain_on(vfe);
1011 	}
1012 
1013 	return ret;
1014 }
1015 
1016 void camss_pm_domain_off(struct camss *camss, int id)
1017 {
1018 	if (id < camss->vfe_num) {
1019 		struct vfe_device *vfe = &camss->vfe[id];
1020 
1021 		vfe->ops->pm_domain_off(vfe);
1022 	}
1023 }
1024 
1025 /*
1026  * camss_of_parse_endpoint_node - Parse port endpoint node
1027  * @dev: Device
1028  * @node: Device node to be parsed
1029  * @csd: Parsed data from port endpoint node
1030  *
1031  * Return 0 on success or a negative error code on failure
1032  */
1033 static int camss_of_parse_endpoint_node(struct device *dev,
1034 					struct device_node *node,
1035 					struct camss_async_subdev *csd)
1036 {
1037 	struct csiphy_lanes_cfg *lncfg = &csd->interface.csi2.lane_cfg;
1038 	struct v4l2_mbus_config_mipi_csi2 *mipi_csi2;
1039 	struct v4l2_fwnode_endpoint vep = { { 0 } };
1040 	unsigned int i;
1041 
1042 	v4l2_fwnode_endpoint_parse(of_fwnode_handle(node), &vep);
1043 
1044 	csd->interface.csiphy_id = vep.base.port;
1045 
1046 	mipi_csi2 = &vep.bus.mipi_csi2;
1047 	lncfg->clk.pos = mipi_csi2->clock_lane;
1048 	lncfg->clk.pol = mipi_csi2->lane_polarities[0];
1049 	lncfg->num_data = mipi_csi2->num_data_lanes;
1050 
1051 	lncfg->data = devm_kcalloc(dev,
1052 				   lncfg->num_data, sizeof(*lncfg->data),
1053 				   GFP_KERNEL);
1054 	if (!lncfg->data)
1055 		return -ENOMEM;
1056 
1057 	for (i = 0; i < lncfg->num_data; i++) {
1058 		lncfg->data[i].pos = mipi_csi2->data_lanes[i];
1059 		lncfg->data[i].pol = mipi_csi2->lane_polarities[i + 1];
1060 	}
1061 
1062 	return 0;
1063 }
1064 
1065 /*
1066  * camss_of_parse_ports - Parse ports node
1067  * @dev: Device
1068  * @notifier: v4l2_device notifier data
1069  *
1070  * Return number of "port" nodes found in "ports" node
1071  */
1072 static int camss_of_parse_ports(struct camss *camss)
1073 {
1074 	struct device *dev = camss->dev;
1075 	struct device_node *node = NULL;
1076 	struct device_node *remote = NULL;
1077 	int ret, num_subdevs = 0;
1078 
1079 	for_each_endpoint_of_node(dev->of_node, node) {
1080 		struct camss_async_subdev *csd;
1081 
1082 		if (!of_device_is_available(node))
1083 			continue;
1084 
1085 		remote = of_graph_get_remote_port_parent(node);
1086 		if (!remote) {
1087 			dev_err(dev, "Cannot get remote parent\n");
1088 			ret = -EINVAL;
1089 			goto err_cleanup;
1090 		}
1091 
1092 		csd = v4l2_async_nf_add_fwnode(&camss->notifier,
1093 					       of_fwnode_handle(remote),
1094 					       struct camss_async_subdev);
1095 		of_node_put(remote);
1096 		if (IS_ERR(csd)) {
1097 			ret = PTR_ERR(csd);
1098 			goto err_cleanup;
1099 		}
1100 
1101 		ret = camss_of_parse_endpoint_node(dev, node, csd);
1102 		if (ret < 0)
1103 			goto err_cleanup;
1104 
1105 		num_subdevs++;
1106 	}
1107 
1108 	return num_subdevs;
1109 
1110 err_cleanup:
1111 	of_node_put(node);
1112 	return ret;
1113 }
1114 
1115 /*
1116  * camss_init_subdevices - Initialize subdev structures and resources
1117  * @camss: CAMSS device
1118  *
1119  * Return 0 on success or a negative error code on failure
1120  */
1121 static int camss_init_subdevices(struct camss *camss)
1122 {
1123 	const struct resources *csiphy_res;
1124 	const struct resources *csid_res;
1125 	const struct resources_ispif *ispif_res;
1126 	const struct resources *vfe_res;
1127 	unsigned int i;
1128 	int ret;
1129 
1130 	if (camss->version == CAMSS_8x16) {
1131 		csiphy_res = csiphy_res_8x16;
1132 		csid_res = csid_res_8x16;
1133 		ispif_res = &ispif_res_8x16;
1134 		vfe_res = vfe_res_8x16;
1135 	} else if (camss->version == CAMSS_8x96) {
1136 		csiphy_res = csiphy_res_8x96;
1137 		csid_res = csid_res_8x96;
1138 		ispif_res = &ispif_res_8x96;
1139 		vfe_res = vfe_res_8x96;
1140 	} else if (camss->version == CAMSS_660) {
1141 		csiphy_res = csiphy_res_660;
1142 		csid_res = csid_res_660;
1143 		ispif_res = &ispif_res_660;
1144 		vfe_res = vfe_res_660;
1145 	}  else if (camss->version == CAMSS_845) {
1146 		csiphy_res = csiphy_res_845;
1147 		csid_res = csid_res_845;
1148 		/* Titan VFEs don't have an ISPIF  */
1149 		ispif_res = NULL;
1150 		vfe_res = vfe_res_845;
1151 	} else if (camss->version == CAMSS_8250) {
1152 		csiphy_res = csiphy_res_8250;
1153 		csid_res = csid_res_8250;
1154 		/* Titan VFEs don't have an ISPIF  */
1155 		ispif_res = NULL;
1156 		vfe_res = vfe_res_8250;
1157 	} else {
1158 		return -EINVAL;
1159 	}
1160 
1161 	for (i = 0; i < camss->csiphy_num; i++) {
1162 		ret = msm_csiphy_subdev_init(camss, &camss->csiphy[i],
1163 					     &csiphy_res[i], i);
1164 		if (ret < 0) {
1165 			dev_err(camss->dev,
1166 				"Failed to init csiphy%d sub-device: %d\n",
1167 				i, ret);
1168 			return ret;
1169 		}
1170 	}
1171 
1172 	/* note: SM8250 requires VFE to be initialized before CSID */
1173 	for (i = 0; i < camss->vfe_num + camss->vfe_lite_num; i++) {
1174 		ret = msm_vfe_subdev_init(camss, &camss->vfe[i],
1175 					  &vfe_res[i], i);
1176 		if (ret < 0) {
1177 			dev_err(camss->dev,
1178 				"Fail to init vfe%d sub-device: %d\n", i, ret);
1179 			return ret;
1180 		}
1181 	}
1182 
1183 	for (i = 0; i < camss->csid_num; i++) {
1184 		ret = msm_csid_subdev_init(camss, &camss->csid[i],
1185 					   &csid_res[i], i);
1186 		if (ret < 0) {
1187 			dev_err(camss->dev,
1188 				"Failed to init csid%d sub-device: %d\n",
1189 				i, ret);
1190 			return ret;
1191 		}
1192 	}
1193 
1194 	ret = msm_ispif_subdev_init(camss, ispif_res);
1195 	if (ret < 0) {
1196 		dev_err(camss->dev, "Failed to init ispif sub-device: %d\n",
1197 		ret);
1198 		return ret;
1199 	}
1200 
1201 	return 0;
1202 }
1203 
1204 /*
1205  * camss_register_entities - Register subdev nodes and create links
1206  * @camss: CAMSS device
1207  *
1208  * Return 0 on success or a negative error code on failure
1209  */
1210 static int camss_register_entities(struct camss *camss)
1211 {
1212 	int i, j, k;
1213 	int ret;
1214 
1215 	for (i = 0; i < camss->csiphy_num; i++) {
1216 		ret = msm_csiphy_register_entity(&camss->csiphy[i],
1217 						 &camss->v4l2_dev);
1218 		if (ret < 0) {
1219 			dev_err(camss->dev,
1220 				"Failed to register csiphy%d entity: %d\n",
1221 				i, ret);
1222 			goto err_reg_csiphy;
1223 		}
1224 	}
1225 
1226 	for (i = 0; i < camss->csid_num; i++) {
1227 		ret = msm_csid_register_entity(&camss->csid[i],
1228 					       &camss->v4l2_dev);
1229 		if (ret < 0) {
1230 			dev_err(camss->dev,
1231 				"Failed to register csid%d entity: %d\n",
1232 				i, ret);
1233 			goto err_reg_csid;
1234 		}
1235 	}
1236 
1237 	ret = msm_ispif_register_entities(camss->ispif,
1238 					  &camss->v4l2_dev);
1239 	if (ret < 0) {
1240 		dev_err(camss->dev, "Failed to register ispif entities: %d\n",
1241 		ret);
1242 		goto err_reg_ispif;
1243 	}
1244 
1245 	for (i = 0; i < camss->vfe_num + camss->vfe_lite_num; i++) {
1246 		ret = msm_vfe_register_entities(&camss->vfe[i],
1247 						&camss->v4l2_dev);
1248 		if (ret < 0) {
1249 			dev_err(camss->dev,
1250 				"Failed to register vfe%d entities: %d\n",
1251 				i, ret);
1252 			goto err_reg_vfe;
1253 		}
1254 	}
1255 
1256 	for (i = 0; i < camss->csiphy_num; i++) {
1257 		for (j = 0; j < camss->csid_num; j++) {
1258 			ret = media_create_pad_link(
1259 				&camss->csiphy[i].subdev.entity,
1260 				MSM_CSIPHY_PAD_SRC,
1261 				&camss->csid[j].subdev.entity,
1262 				MSM_CSID_PAD_SINK,
1263 				0);
1264 			if (ret < 0) {
1265 				dev_err(camss->dev,
1266 					"Failed to link %s->%s entities: %d\n",
1267 					camss->csiphy[i].subdev.entity.name,
1268 					camss->csid[j].subdev.entity.name,
1269 					ret);
1270 				goto err_link;
1271 			}
1272 		}
1273 	}
1274 
1275 	if (camss->ispif) {
1276 		for (i = 0; i < camss->csid_num; i++) {
1277 			for (j = 0; j < camss->ispif->line_num; j++) {
1278 				ret = media_create_pad_link(
1279 					&camss->csid[i].subdev.entity,
1280 					MSM_CSID_PAD_SRC,
1281 					&camss->ispif->line[j].subdev.entity,
1282 					MSM_ISPIF_PAD_SINK,
1283 					0);
1284 				if (ret < 0) {
1285 					dev_err(camss->dev,
1286 						"Failed to link %s->%s entities: %d\n",
1287 						camss->csid[i].subdev.entity.name,
1288 						camss->ispif->line[j].subdev.entity.name,
1289 						ret);
1290 					goto err_link;
1291 				}
1292 			}
1293 		}
1294 
1295 		for (i = 0; i < camss->ispif->line_num; i++)
1296 			for (k = 0; k < camss->vfe_num; k++)
1297 				for (j = 0; j < camss->vfe[k].line_num; j++) {
1298 					struct v4l2_subdev *ispif = &camss->ispif->line[i].subdev;
1299 					struct v4l2_subdev *vfe = &camss->vfe[k].line[j].subdev;
1300 
1301 					ret = media_create_pad_link(&ispif->entity,
1302 								    MSM_ISPIF_PAD_SRC,
1303 								    &vfe->entity,
1304 								    MSM_VFE_PAD_SINK,
1305 								    0);
1306 					if (ret < 0) {
1307 						dev_err(camss->dev,
1308 							"Failed to link %s->%s entities: %d\n",
1309 							ispif->entity.name,
1310 							vfe->entity.name,
1311 							ret);
1312 						goto err_link;
1313 					}
1314 				}
1315 	} else {
1316 		for (i = 0; i < camss->csid_num; i++)
1317 			for (k = 0; k < camss->vfe_num + camss->vfe_lite_num; k++)
1318 				for (j = 0; j < camss->vfe[k].line_num; j++) {
1319 					struct v4l2_subdev *csid = &camss->csid[i].subdev;
1320 					struct v4l2_subdev *vfe = &camss->vfe[k].line[j].subdev;
1321 
1322 					ret = media_create_pad_link(&csid->entity,
1323 								    MSM_CSID_PAD_FIRST_SRC + j,
1324 								    &vfe->entity,
1325 								    MSM_VFE_PAD_SINK,
1326 								    0);
1327 					if (ret < 0) {
1328 						dev_err(camss->dev,
1329 							"Failed to link %s->%s entities: %d\n",
1330 							csid->entity.name,
1331 							vfe->entity.name,
1332 							ret);
1333 						goto err_link;
1334 					}
1335 				}
1336 	}
1337 
1338 	return 0;
1339 
1340 err_link:
1341 	i = camss->vfe_num + camss->vfe_lite_num;
1342 err_reg_vfe:
1343 	for (i--; i >= 0; i--)
1344 		msm_vfe_unregister_entities(&camss->vfe[i]);
1345 
1346 err_reg_ispif:
1347 	msm_ispif_unregister_entities(camss->ispif);
1348 
1349 	i = camss->csid_num;
1350 err_reg_csid:
1351 	for (i--; i >= 0; i--)
1352 		msm_csid_unregister_entity(&camss->csid[i]);
1353 
1354 	i = camss->csiphy_num;
1355 err_reg_csiphy:
1356 	for (i--; i >= 0; i--)
1357 		msm_csiphy_unregister_entity(&camss->csiphy[i]);
1358 
1359 	return ret;
1360 }
1361 
1362 /*
1363  * camss_unregister_entities - Unregister subdev nodes
1364  * @camss: CAMSS device
1365  *
1366  * Return 0 on success or a negative error code on failure
1367  */
1368 static void camss_unregister_entities(struct camss *camss)
1369 {
1370 	unsigned int i;
1371 
1372 	for (i = 0; i < camss->csiphy_num; i++)
1373 		msm_csiphy_unregister_entity(&camss->csiphy[i]);
1374 
1375 	for (i = 0; i < camss->csid_num; i++)
1376 		msm_csid_unregister_entity(&camss->csid[i]);
1377 
1378 	msm_ispif_unregister_entities(camss->ispif);
1379 
1380 	for (i = 0; i < camss->vfe_num + camss->vfe_lite_num; i++)
1381 		msm_vfe_unregister_entities(&camss->vfe[i]);
1382 }
1383 
1384 static int camss_subdev_notifier_bound(struct v4l2_async_notifier *async,
1385 				       struct v4l2_subdev *subdev,
1386 				       struct v4l2_async_connection *asd)
1387 {
1388 	struct camss *camss = container_of(async, struct camss, notifier);
1389 	struct camss_async_subdev *csd =
1390 		container_of(asd, struct camss_async_subdev, asd);
1391 	u8 id = csd->interface.csiphy_id;
1392 	struct csiphy_device *csiphy = &camss->csiphy[id];
1393 
1394 	csiphy->cfg.csi2 = &csd->interface.csi2;
1395 	subdev->host_priv = csiphy;
1396 
1397 	return 0;
1398 }
1399 
1400 static int camss_subdev_notifier_complete(struct v4l2_async_notifier *async)
1401 {
1402 	struct camss *camss = container_of(async, struct camss, notifier);
1403 	struct v4l2_device *v4l2_dev = &camss->v4l2_dev;
1404 	struct v4l2_subdev *sd;
1405 	int ret;
1406 
1407 	list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
1408 		if (sd->host_priv) {
1409 			struct media_entity *sensor = &sd->entity;
1410 			struct csiphy_device *csiphy =
1411 					(struct csiphy_device *) sd->host_priv;
1412 			struct media_entity *input = &csiphy->subdev.entity;
1413 			unsigned int i;
1414 
1415 			for (i = 0; i < sensor->num_pads; i++) {
1416 				if (sensor->pads[i].flags & MEDIA_PAD_FL_SOURCE)
1417 					break;
1418 			}
1419 			if (i == sensor->num_pads) {
1420 				dev_err(camss->dev,
1421 					"No source pad in external entity\n");
1422 				return -EINVAL;
1423 			}
1424 
1425 			ret = media_create_pad_link(sensor, i,
1426 				input, MSM_CSIPHY_PAD_SINK,
1427 				MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
1428 			if (ret < 0) {
1429 				dev_err(camss->dev,
1430 					"Failed to link %s->%s entities: %d\n",
1431 					sensor->name, input->name, ret);
1432 				return ret;
1433 			}
1434 		}
1435 	}
1436 
1437 	ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev);
1438 	if (ret < 0)
1439 		return ret;
1440 
1441 	return media_device_register(&camss->media_dev);
1442 }
1443 
1444 static const struct v4l2_async_notifier_operations camss_subdev_notifier_ops = {
1445 	.bound = camss_subdev_notifier_bound,
1446 	.complete = camss_subdev_notifier_complete,
1447 };
1448 
1449 static const struct media_device_ops camss_media_ops = {
1450 	.link_notify = v4l2_pipeline_link_notify,
1451 };
1452 
1453 static int camss_configure_pd(struct camss *camss)
1454 {
1455 	struct device *dev = camss->dev;
1456 	int i;
1457 	int ret;
1458 
1459 	camss->genpd_num = of_count_phandle_with_args(dev->of_node,
1460 						      "power-domains",
1461 						      "#power-domain-cells");
1462 	if (camss->genpd_num < 0) {
1463 		dev_err(dev, "Power domains are not defined for camss\n");
1464 		return camss->genpd_num;
1465 	}
1466 
1467 	/*
1468 	 * If a platform device has just one power domain, then it is attached
1469 	 * at platform_probe() level, thus there shall be no need and even no
1470 	 * option to attach it again, this is the case for CAMSS on MSM8916.
1471 	 */
1472 	if (camss->genpd_num == 1)
1473 		return 0;
1474 
1475 	camss->genpd = devm_kmalloc_array(dev, camss->genpd_num,
1476 					  sizeof(*camss->genpd), GFP_KERNEL);
1477 	if (!camss->genpd)
1478 		return -ENOMEM;
1479 
1480 	camss->genpd_link = devm_kmalloc_array(dev, camss->genpd_num,
1481 					       sizeof(*camss->genpd_link),
1482 					       GFP_KERNEL);
1483 	if (!camss->genpd_link)
1484 		return -ENOMEM;
1485 
1486 	/*
1487 	 * VFE power domains are in the beginning of the list, and while all
1488 	 * power domains should be attached, only if TITAN_TOP power domain is
1489 	 * found in the list, it should be linked over here.
1490 	 */
1491 	for (i = 0; i < camss->genpd_num; i++) {
1492 		camss->genpd[i] = dev_pm_domain_attach_by_id(camss->dev, i);
1493 		if (IS_ERR(camss->genpd[i])) {
1494 			ret = PTR_ERR(camss->genpd[i]);
1495 			goto fail_pm;
1496 		}
1497 	}
1498 
1499 	if (i > camss->vfe_num) {
1500 		camss->genpd_link[i - 1] = device_link_add(camss->dev, camss->genpd[i - 1],
1501 							   DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
1502 							   DL_FLAG_RPM_ACTIVE);
1503 		if (!camss->genpd_link[i - 1]) {
1504 			ret = -EINVAL;
1505 			goto fail_pm;
1506 		}
1507 	}
1508 
1509 	return 0;
1510 
1511 fail_pm:
1512 	for (--i ; i >= 0; i--)
1513 		dev_pm_domain_detach(camss->genpd[i], true);
1514 
1515 	return ret;
1516 }
1517 
1518 static int camss_icc_get(struct camss *camss)
1519 {
1520 	const struct resources_icc *icc_res;
1521 	int nbr_icc_paths = 0;
1522 	int i;
1523 
1524 	if (camss->version == CAMSS_8250) {
1525 		icc_res = &icc_res_sm8250[0];
1526 		nbr_icc_paths =	ICC_SM8250_COUNT;
1527 	}
1528 
1529 	for (i = 0; i < nbr_icc_paths; i++) {
1530 		camss->icc_path[i] = devm_of_icc_get(camss->dev,
1531 						     icc_res[i].name);
1532 		if (IS_ERR(camss->icc_path[i]))
1533 			return PTR_ERR(camss->icc_path[i]);
1534 
1535 		camss->icc_bw_tbl[i] = icc_res[i].icc_bw_tbl;
1536 	}
1537 
1538 	return 0;
1539 }
1540 
1541 /*
1542  * camss_probe - Probe CAMSS platform device
1543  * @pdev: Pointer to CAMSS platform device
1544  *
1545  * Return 0 on success or a negative error code on failure
1546  */
1547 static int camss_probe(struct platform_device *pdev)
1548 {
1549 	struct device *dev = &pdev->dev;
1550 	struct camss *camss;
1551 	int num_subdevs, ret;
1552 
1553 	camss = devm_kzalloc(dev, sizeof(*camss), GFP_KERNEL);
1554 	if (!camss)
1555 		return -ENOMEM;
1556 
1557 	atomic_set(&camss->ref_count, 0);
1558 	camss->dev = dev;
1559 	platform_set_drvdata(pdev, camss);
1560 
1561 	if (of_device_is_compatible(dev->of_node, "qcom,msm8916-camss")) {
1562 		camss->version = CAMSS_8x16;
1563 		camss->csiphy_num = 2;
1564 		camss->csid_num = 2;
1565 		camss->vfe_num = 1;
1566 	} else if (of_device_is_compatible(dev->of_node,
1567 					   "qcom,msm8996-camss")) {
1568 		camss->version = CAMSS_8x96;
1569 		camss->csiphy_num = 3;
1570 		camss->csid_num = 4;
1571 		camss->vfe_num = 2;
1572 	} else if (of_device_is_compatible(dev->of_node,
1573 					   "qcom,sdm660-camss")) {
1574 		camss->version = CAMSS_660;
1575 		camss->csiphy_num = 3;
1576 		camss->csid_num = 4;
1577 		camss->vfe_num = 2;
1578 	} else if (of_device_is_compatible(dev->of_node,
1579 					   "qcom,sdm845-camss")) {
1580 		camss->version = CAMSS_845;
1581 		camss->csiphy_num = 4;
1582 		camss->csid_num = 3;
1583 		camss->vfe_num = 2;
1584 		camss->vfe_lite_num = 1;
1585 	} else if (of_device_is_compatible(dev->of_node,
1586 					   "qcom,sm8250-camss")) {
1587 		camss->version = CAMSS_8250;
1588 		camss->csiphy_num = 6;
1589 		camss->csid_num = 4;
1590 		camss->vfe_num = 2;
1591 		camss->vfe_lite_num = 2;
1592 	} else {
1593 		return -EINVAL;
1594 	}
1595 
1596 	camss->csiphy = devm_kcalloc(dev, camss->csiphy_num,
1597 				     sizeof(*camss->csiphy), GFP_KERNEL);
1598 	if (!camss->csiphy)
1599 		return -ENOMEM;
1600 
1601 	camss->csid = devm_kcalloc(dev, camss->csid_num, sizeof(*camss->csid),
1602 				   GFP_KERNEL);
1603 	if (!camss->csid)
1604 		return -ENOMEM;
1605 
1606 	if (camss->version == CAMSS_8x16 ||
1607 	    camss->version == CAMSS_8x96) {
1608 		camss->ispif = devm_kcalloc(dev, 1, sizeof(*camss->ispif), GFP_KERNEL);
1609 		if (!camss->ispif)
1610 			return -ENOMEM;
1611 	}
1612 
1613 	camss->vfe = devm_kcalloc(dev, camss->vfe_num + camss->vfe_lite_num,
1614 				  sizeof(*camss->vfe), GFP_KERNEL);
1615 	if (!camss->vfe)
1616 		return -ENOMEM;
1617 
1618 	ret = camss_icc_get(camss);
1619 	if (ret < 0)
1620 		goto err_cleanup;
1621 
1622 	ret = camss_configure_pd(camss);
1623 	if (ret < 0) {
1624 		dev_err(dev, "Failed to configure power domains: %d\n", ret);
1625 		goto err_cleanup;
1626 	}
1627 
1628 	ret = camss_init_subdevices(camss);
1629 	if (ret < 0)
1630 		goto err_cleanup;
1631 
1632 	ret = dma_set_mask_and_coherent(dev, 0xffffffff);
1633 	if (ret)
1634 		goto err_cleanup;
1635 
1636 	camss->media_dev.dev = camss->dev;
1637 	strscpy(camss->media_dev.model, "Qualcomm Camera Subsystem",
1638 		sizeof(camss->media_dev.model));
1639 	camss->media_dev.ops = &camss_media_ops;
1640 	media_device_init(&camss->media_dev);
1641 
1642 	camss->v4l2_dev.mdev = &camss->media_dev;
1643 	ret = v4l2_device_register(camss->dev, &camss->v4l2_dev);
1644 	if (ret < 0) {
1645 		dev_err(dev, "Failed to register V4L2 device: %d\n", ret);
1646 		goto err_cleanup;
1647 	}
1648 
1649 	v4l2_async_nf_init(&camss->notifier, &camss->v4l2_dev);
1650 
1651 	num_subdevs = camss_of_parse_ports(camss);
1652 	if (num_subdevs < 0) {
1653 		ret = num_subdevs;
1654 		goto err_cleanup;
1655 	}
1656 
1657 	ret = camss_register_entities(camss);
1658 	if (ret < 0)
1659 		goto err_cleanup;
1660 
1661 	if (num_subdevs) {
1662 		camss->notifier.ops = &camss_subdev_notifier_ops;
1663 
1664 		ret = v4l2_async_nf_register(&camss->notifier);
1665 		if (ret) {
1666 			dev_err(dev,
1667 				"Failed to register async subdev nodes: %d\n",
1668 				ret);
1669 			goto err_register_subdevs;
1670 		}
1671 	} else {
1672 		ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev);
1673 		if (ret < 0) {
1674 			dev_err(dev, "Failed to register subdev nodes: %d\n",
1675 				ret);
1676 			goto err_register_subdevs;
1677 		}
1678 
1679 		ret = media_device_register(&camss->media_dev);
1680 		if (ret < 0) {
1681 			dev_err(dev, "Failed to register media device: %d\n",
1682 				ret);
1683 			goto err_register_subdevs;
1684 		}
1685 	}
1686 
1687 	pm_runtime_enable(dev);
1688 
1689 	return 0;
1690 
1691 err_register_subdevs:
1692 	camss_unregister_entities(camss);
1693 err_cleanup:
1694 	v4l2_device_unregister(&camss->v4l2_dev);
1695 	v4l2_async_nf_cleanup(&camss->notifier);
1696 
1697 	return ret;
1698 }
1699 
1700 void camss_delete(struct camss *camss)
1701 {
1702 	int i;
1703 
1704 	v4l2_device_unregister(&camss->v4l2_dev);
1705 	media_device_unregister(&camss->media_dev);
1706 	media_device_cleanup(&camss->media_dev);
1707 
1708 	pm_runtime_disable(camss->dev);
1709 
1710 	if (camss->genpd_num == 1)
1711 		return;
1712 
1713 	if (camss->genpd_num > camss->vfe_num)
1714 		device_link_del(camss->genpd_link[camss->genpd_num - 1]);
1715 
1716 	for (i = 0; i < camss->genpd_num; i++)
1717 		dev_pm_domain_detach(camss->genpd[i], true);
1718 }
1719 
1720 /*
1721  * camss_remove - Remove CAMSS platform device
1722  * @pdev: Pointer to CAMSS platform device
1723  *
1724  * Always returns 0.
1725  */
1726 static void camss_remove(struct platform_device *pdev)
1727 {
1728 	struct camss *camss = platform_get_drvdata(pdev);
1729 
1730 	v4l2_async_nf_unregister(&camss->notifier);
1731 	v4l2_async_nf_cleanup(&camss->notifier);
1732 	camss_unregister_entities(camss);
1733 
1734 	if (atomic_read(&camss->ref_count) == 0)
1735 		camss_delete(camss);
1736 }
1737 
1738 static const struct of_device_id camss_dt_match[] = {
1739 	{ .compatible = "qcom,msm8916-camss" },
1740 	{ .compatible = "qcom,msm8996-camss" },
1741 	{ .compatible = "qcom,sdm660-camss" },
1742 	{ .compatible = "qcom,sdm845-camss" },
1743 	{ .compatible = "qcom,sm8250-camss" },
1744 	{ }
1745 };
1746 
1747 MODULE_DEVICE_TABLE(of, camss_dt_match);
1748 
1749 static int __maybe_unused camss_runtime_suspend(struct device *dev)
1750 {
1751 	struct camss *camss = dev_get_drvdata(dev);
1752 	int nbr_icc_paths = 0;
1753 	int i;
1754 	int ret;
1755 
1756 	if (camss->version == CAMSS_8250)
1757 		nbr_icc_paths =	ICC_SM8250_COUNT;
1758 
1759 	for (i = 0; i < nbr_icc_paths; i++) {
1760 		ret = icc_set_bw(camss->icc_path[i], 0, 0);
1761 		if (ret)
1762 			return ret;
1763 	}
1764 
1765 	return 0;
1766 }
1767 
1768 static int __maybe_unused camss_runtime_resume(struct device *dev)
1769 {
1770 	struct camss *camss = dev_get_drvdata(dev);
1771 	int nbr_icc_paths = 0;
1772 	int i;
1773 	int ret;
1774 
1775 	if (camss->version == CAMSS_8250)
1776 		nbr_icc_paths =	ICC_SM8250_COUNT;
1777 
1778 	for (i = 0; i < nbr_icc_paths; i++) {
1779 		ret = icc_set_bw(camss->icc_path[i],
1780 				 camss->icc_bw_tbl[i].avg,
1781 				 camss->icc_bw_tbl[i].peak);
1782 		if (ret)
1783 			return ret;
1784 	}
1785 
1786 	return 0;
1787 }
1788 
1789 static const struct dev_pm_ops camss_pm_ops = {
1790 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1791 				pm_runtime_force_resume)
1792 	SET_RUNTIME_PM_OPS(camss_runtime_suspend, camss_runtime_resume, NULL)
1793 };
1794 
1795 static struct platform_driver qcom_camss_driver = {
1796 	.probe = camss_probe,
1797 	.remove_new = camss_remove,
1798 	.driver = {
1799 		.name = "qcom-camss",
1800 		.of_match_table = camss_dt_match,
1801 		.pm = &camss_pm_ops,
1802 	},
1803 };
1804 
1805 module_platform_driver(qcom_camss_driver);
1806 
1807 MODULE_ALIAS("platform:qcom-camss");
1808 MODULE_DESCRIPTION("Qualcomm Camera Subsystem driver");
1809 MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>");
1810 MODULE_LICENSE("GPL v2");
1811