1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * camss-vfe.c
4  *
5  * Qualcomm MSM Camera Subsystem - VFE (Video Front End) Module
6  *
7  * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
8  * Copyright (C) 2015-2018 Linaro Ltd.
9  */
10 #include <linux/clk.h>
11 #include <linux/completion.h>
12 #include <linux/interrupt.h>
13 #include <linux/iommu.h>
14 #include <linux/mutex.h>
15 #include <linux/of.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/spinlock_types.h>
19 #include <linux/spinlock.h>
20 #include <media/media-entity.h>
21 #include <media/v4l2-device.h>
22 #include <media/v4l2-subdev.h>
23 
24 #include "camss-vfe.h"
25 #include "camss.h"
26 
27 #define MSM_VFE_NAME "msm_vfe"
28 
29 /* VFE reset timeout */
30 #define VFE_RESET_TIMEOUT_MS 50
31 
32 #define SCALER_RATIO_MAX 16
33 
34 struct vfe_format {
35 	u32 code;
36 	u8 bpp;
37 };
38 
39 static const struct vfe_format formats_rdi_8x16[] = {
40 	{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
41 	{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
42 	{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
43 	{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
44 	{ MEDIA_BUS_FMT_SBGGR8_1X8, 8 },
45 	{ MEDIA_BUS_FMT_SGBRG8_1X8, 8 },
46 	{ MEDIA_BUS_FMT_SGRBG8_1X8, 8 },
47 	{ MEDIA_BUS_FMT_SRGGB8_1X8, 8 },
48 	{ MEDIA_BUS_FMT_SBGGR10_1X10, 10 },
49 	{ MEDIA_BUS_FMT_SGBRG10_1X10, 10 },
50 	{ MEDIA_BUS_FMT_SGRBG10_1X10, 10 },
51 	{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
52 	{ MEDIA_BUS_FMT_SBGGR12_1X12, 12 },
53 	{ MEDIA_BUS_FMT_SGBRG12_1X12, 12 },
54 	{ MEDIA_BUS_FMT_SGRBG12_1X12, 12 },
55 	{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
56 	{ MEDIA_BUS_FMT_Y10_1X10, 10 },
57 };
58 
59 static const struct vfe_format formats_pix_8x16[] = {
60 	{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
61 	{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
62 	{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
63 	{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
64 };
65 
66 static const struct vfe_format formats_rdi_8x96[] = {
67 	{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
68 	{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
69 	{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
70 	{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
71 	{ MEDIA_BUS_FMT_SBGGR8_1X8, 8 },
72 	{ MEDIA_BUS_FMT_SGBRG8_1X8, 8 },
73 	{ MEDIA_BUS_FMT_SGRBG8_1X8, 8 },
74 	{ MEDIA_BUS_FMT_SRGGB8_1X8, 8 },
75 	{ MEDIA_BUS_FMT_SBGGR10_1X10, 10 },
76 	{ MEDIA_BUS_FMT_SGBRG10_1X10, 10 },
77 	{ MEDIA_BUS_FMT_SGRBG10_1X10, 10 },
78 	{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
79 	{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, 16 },
80 	{ MEDIA_BUS_FMT_SBGGR12_1X12, 12 },
81 	{ MEDIA_BUS_FMT_SGBRG12_1X12, 12 },
82 	{ MEDIA_BUS_FMT_SGRBG12_1X12, 12 },
83 	{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
84 	{ MEDIA_BUS_FMT_SBGGR14_1X14, 14 },
85 	{ MEDIA_BUS_FMT_SGBRG14_1X14, 14 },
86 	{ MEDIA_BUS_FMT_SGRBG14_1X14, 14 },
87 	{ MEDIA_BUS_FMT_SRGGB14_1X14, 14 },
88 	{ MEDIA_BUS_FMT_Y10_1X10, 10 },
89 	{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, 16 },
90 };
91 
92 static const struct vfe_format formats_pix_8x96[] = {
93 	{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
94 	{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
95 	{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
96 	{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
97 };
98 
99 static const struct vfe_format formats_rdi_845[] = {
100 	{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
101 	{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
102 	{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
103 	{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
104 	{ MEDIA_BUS_FMT_SBGGR8_1X8, 8 },
105 	{ MEDIA_BUS_FMT_SGBRG8_1X8, 8 },
106 	{ MEDIA_BUS_FMT_SGRBG8_1X8, 8 },
107 	{ MEDIA_BUS_FMT_SRGGB8_1X8, 8 },
108 	{ MEDIA_BUS_FMT_SBGGR10_1X10, 10 },
109 	{ MEDIA_BUS_FMT_SGBRG10_1X10, 10 },
110 	{ MEDIA_BUS_FMT_SGRBG10_1X10, 10 },
111 	{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
112 	{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, 16 },
113 	{ MEDIA_BUS_FMT_SBGGR12_1X12, 12 },
114 	{ MEDIA_BUS_FMT_SGBRG12_1X12, 12 },
115 	{ MEDIA_BUS_FMT_SGRBG12_1X12, 12 },
116 	{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
117 	{ MEDIA_BUS_FMT_SBGGR14_1X14, 14 },
118 	{ MEDIA_BUS_FMT_SGBRG14_1X14, 14 },
119 	{ MEDIA_BUS_FMT_SGRBG14_1X14, 14 },
120 	{ MEDIA_BUS_FMT_SRGGB14_1X14, 14 },
121 	{ MEDIA_BUS_FMT_Y8_1X8, 8 },
122 	{ MEDIA_BUS_FMT_Y10_1X10, 10 },
123 	{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, 16 },
124 };
125 
126 /*
127  * vfe_get_bpp - map media bus format to bits per pixel
128  * @formats: supported media bus formats array
129  * @nformats: size of @formats array
130  * @code: media bus format code
131  *
132  * Return number of bits per pixel
133  */
134 static u8 vfe_get_bpp(const struct vfe_format *formats,
135 		      unsigned int nformats, u32 code)
136 {
137 	unsigned int i;
138 
139 	for (i = 0; i < nformats; i++)
140 		if (code == formats[i].code)
141 			return formats[i].bpp;
142 
143 	WARN(1, "Unknown format\n");
144 
145 	return formats[0].bpp;
146 }
147 
148 static u32 vfe_find_code(u32 *code, unsigned int n_code,
149 			 unsigned int index, u32 req_code)
150 {
151 	int i;
152 
153 	if (!req_code && (index >= n_code))
154 		return 0;
155 
156 	for (i = 0; i < n_code; i++)
157 		if (req_code) {
158 			if (req_code == code[i])
159 				return req_code;
160 		} else {
161 			if (i == index)
162 				return code[i];
163 		}
164 
165 	return code[0];
166 }
167 
168 static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
169 			    unsigned int index, u32 src_req_code)
170 {
171 	struct vfe_device *vfe = to_vfe(line);
172 
173 	if (vfe->camss->version == CAMSS_8x16)
174 		switch (sink_code) {
175 		case MEDIA_BUS_FMT_YUYV8_2X8:
176 		{
177 			u32 src_code[] = {
178 				MEDIA_BUS_FMT_YUYV8_2X8,
179 				MEDIA_BUS_FMT_YUYV8_1_5X8,
180 			};
181 
182 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
183 					     index, src_req_code);
184 		}
185 		case MEDIA_BUS_FMT_YVYU8_2X8:
186 		{
187 			u32 src_code[] = {
188 				MEDIA_BUS_FMT_YVYU8_2X8,
189 				MEDIA_BUS_FMT_YVYU8_1_5X8,
190 			};
191 
192 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
193 					     index, src_req_code);
194 		}
195 		case MEDIA_BUS_FMT_UYVY8_2X8:
196 		{
197 			u32 src_code[] = {
198 				MEDIA_BUS_FMT_UYVY8_2X8,
199 				MEDIA_BUS_FMT_UYVY8_1_5X8,
200 			};
201 
202 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
203 					     index, src_req_code);
204 		}
205 		case MEDIA_BUS_FMT_VYUY8_2X8:
206 		{
207 			u32 src_code[] = {
208 				MEDIA_BUS_FMT_VYUY8_2X8,
209 				MEDIA_BUS_FMT_VYUY8_1_5X8,
210 			};
211 
212 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
213 					     index, src_req_code);
214 		}
215 		default:
216 			if (index > 0)
217 				return 0;
218 
219 			return sink_code;
220 		}
221 	else if (vfe->camss->version == CAMSS_8x96 ||
222 		 vfe->camss->version == CAMSS_660 ||
223 		 vfe->camss->version == CAMSS_845 ||
224 		 vfe->camss->version == CAMSS_8250)
225 		switch (sink_code) {
226 		case MEDIA_BUS_FMT_YUYV8_2X8:
227 		{
228 			u32 src_code[] = {
229 				MEDIA_BUS_FMT_YUYV8_2X8,
230 				MEDIA_BUS_FMT_YVYU8_2X8,
231 				MEDIA_BUS_FMT_UYVY8_2X8,
232 				MEDIA_BUS_FMT_VYUY8_2X8,
233 				MEDIA_BUS_FMT_YUYV8_1_5X8,
234 			};
235 
236 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
237 					     index, src_req_code);
238 		}
239 		case MEDIA_BUS_FMT_YVYU8_2X8:
240 		{
241 			u32 src_code[] = {
242 				MEDIA_BUS_FMT_YVYU8_2X8,
243 				MEDIA_BUS_FMT_YUYV8_2X8,
244 				MEDIA_BUS_FMT_UYVY8_2X8,
245 				MEDIA_BUS_FMT_VYUY8_2X8,
246 				MEDIA_BUS_FMT_YVYU8_1_5X8,
247 			};
248 
249 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
250 					     index, src_req_code);
251 		}
252 		case MEDIA_BUS_FMT_UYVY8_2X8:
253 		{
254 			u32 src_code[] = {
255 				MEDIA_BUS_FMT_UYVY8_2X8,
256 				MEDIA_BUS_FMT_YUYV8_2X8,
257 				MEDIA_BUS_FMT_YVYU8_2X8,
258 				MEDIA_BUS_FMT_VYUY8_2X8,
259 				MEDIA_BUS_FMT_UYVY8_1_5X8,
260 			};
261 
262 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
263 					     index, src_req_code);
264 		}
265 		case MEDIA_BUS_FMT_VYUY8_2X8:
266 		{
267 			u32 src_code[] = {
268 				MEDIA_BUS_FMT_VYUY8_2X8,
269 				MEDIA_BUS_FMT_YUYV8_2X8,
270 				MEDIA_BUS_FMT_YVYU8_2X8,
271 				MEDIA_BUS_FMT_UYVY8_2X8,
272 				MEDIA_BUS_FMT_VYUY8_1_5X8,
273 			};
274 
275 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
276 					     index, src_req_code);
277 		}
278 		default:
279 			if (index > 0)
280 				return 0;
281 
282 			return sink_code;
283 		}
284 	else
285 		return 0;
286 }
287 
288 int vfe_reset(struct vfe_device *vfe)
289 {
290 	unsigned long time;
291 
292 	reinit_completion(&vfe->reset_complete);
293 
294 	vfe->ops->global_reset(vfe);
295 
296 	time = wait_for_completion_timeout(&vfe->reset_complete,
297 		msecs_to_jiffies(VFE_RESET_TIMEOUT_MS));
298 	if (!time) {
299 		dev_err(vfe->camss->dev, "VFE reset timeout\n");
300 		return -EIO;
301 	}
302 
303 	return 0;
304 }
305 
306 static void vfe_init_outputs(struct vfe_device *vfe)
307 {
308 	int i;
309 
310 	for (i = 0; i < vfe->line_num; i++) {
311 		struct vfe_output *output = &vfe->line[i].output;
312 
313 		output->state = VFE_OUTPUT_OFF;
314 		output->buf[0] = NULL;
315 		output->buf[1] = NULL;
316 		INIT_LIST_HEAD(&output->pending_bufs);
317 	}
318 }
319 
320 static void vfe_reset_output_maps(struct vfe_device *vfe)
321 {
322 	int i;
323 
324 	for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++)
325 		vfe->wm_output_map[i] = VFE_LINE_NONE;
326 }
327 
328 int vfe_reserve_wm(struct vfe_device *vfe, enum vfe_line_id line_id)
329 {
330 	int ret = -EBUSY;
331 	int i;
332 
333 	for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++) {
334 		if (vfe->wm_output_map[i] == VFE_LINE_NONE) {
335 			vfe->wm_output_map[i] = line_id;
336 			ret = i;
337 			break;
338 		}
339 	}
340 
341 	return ret;
342 }
343 
344 int vfe_release_wm(struct vfe_device *vfe, u8 wm)
345 {
346 	if (wm >= ARRAY_SIZE(vfe->wm_output_map))
347 		return -EINVAL;
348 
349 	vfe->wm_output_map[wm] = VFE_LINE_NONE;
350 
351 	return 0;
352 }
353 
354 struct camss_buffer *vfe_buf_get_pending(struct vfe_output *output)
355 {
356 	struct camss_buffer *buffer = NULL;
357 
358 	if (!list_empty(&output->pending_bufs)) {
359 		buffer = list_first_entry(&output->pending_bufs,
360 					  struct camss_buffer,
361 					  queue);
362 		list_del(&buffer->queue);
363 	}
364 
365 	return buffer;
366 }
367 
368 void vfe_buf_add_pending(struct vfe_output *output,
369 			 struct camss_buffer *buffer)
370 {
371 	INIT_LIST_HEAD(&buffer->queue);
372 	list_add_tail(&buffer->queue, &output->pending_bufs);
373 }
374 
375 /*
376  * vfe_buf_flush_pending - Flush all pending buffers.
377  * @output: VFE output
378  * @state: vb2 buffer state
379  */
380 static void vfe_buf_flush_pending(struct vfe_output *output,
381 				  enum vb2_buffer_state state)
382 {
383 	struct camss_buffer *buf;
384 	struct camss_buffer *t;
385 
386 	list_for_each_entry_safe(buf, t, &output->pending_bufs, queue) {
387 		vb2_buffer_done(&buf->vb.vb2_buf, state);
388 		list_del(&buf->queue);
389 	}
390 }
391 
392 int vfe_put_output(struct vfe_line *line)
393 {
394 	struct vfe_device *vfe = to_vfe(line);
395 	struct vfe_output *output = &line->output;
396 	unsigned long flags;
397 	unsigned int i;
398 
399 	spin_lock_irqsave(&vfe->output_lock, flags);
400 
401 	for (i = 0; i < output->wm_num; i++)
402 		vfe_release_wm(vfe, output->wm_idx[i]);
403 
404 	output->state = VFE_OUTPUT_OFF;
405 
406 	spin_unlock_irqrestore(&vfe->output_lock, flags);
407 	return 0;
408 }
409 
410 /**
411  * vfe_isr_comp_done() - Process composite image done interrupt
412  * @vfe: VFE Device
413  * @comp: Composite image id
414  */
415 void vfe_isr_comp_done(struct vfe_device *vfe, u8 comp)
416 {
417 	unsigned int i;
418 
419 	for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++)
420 		if (vfe->wm_output_map[i] == VFE_LINE_PIX) {
421 			vfe->isr_ops.wm_done(vfe, i);
422 			break;
423 		}
424 }
425 
426 void vfe_isr_reset_ack(struct vfe_device *vfe)
427 {
428 	complete(&vfe->reset_complete);
429 }
430 
431 /*
432  * vfe_set_clock_rates - Calculate and set clock rates on VFE module
433  * @vfe: VFE device
434  *
435  * Return 0 on success or a negative error code otherwise
436  */
437 static int vfe_set_clock_rates(struct vfe_device *vfe)
438 {
439 	struct device *dev = vfe->camss->dev;
440 	u64 pixel_clock[VFE_LINE_NUM_MAX];
441 	int i, j;
442 	int ret;
443 
444 	for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
445 		ret = camss_get_pixel_clock(&vfe->line[i].subdev.entity,
446 					    &pixel_clock[i]);
447 		if (ret)
448 			pixel_clock[i] = 0;
449 	}
450 
451 	for (i = 0; i < vfe->nclocks; i++) {
452 		struct camss_clock *clock = &vfe->clock[i];
453 
454 		if (!strcmp(clock->name, "vfe0") ||
455 		    !strcmp(clock->name, "vfe1") ||
456 		    !strcmp(clock->name, "vfe_lite")) {
457 			u64 min_rate = 0;
458 			long rate;
459 
460 			for (j = VFE_LINE_RDI0; j < vfe->line_num; j++) {
461 				u32 tmp;
462 				u8 bpp;
463 
464 				if (j == VFE_LINE_PIX) {
465 					tmp = pixel_clock[j];
466 				} else {
467 					struct vfe_line *l = &vfe->line[j];
468 
469 					bpp = vfe_get_bpp(l->formats,
470 						l->nformats,
471 						l->fmt[MSM_VFE_PAD_SINK].code);
472 					tmp = pixel_clock[j] * bpp / 64;
473 				}
474 
475 				if (min_rate < tmp)
476 					min_rate = tmp;
477 			}
478 
479 			camss_add_clock_margin(&min_rate);
480 
481 			for (j = 0; j < clock->nfreqs; j++)
482 				if (min_rate < clock->freq[j])
483 					break;
484 
485 			if (j == clock->nfreqs) {
486 				dev_err(dev,
487 					"Pixel clock is too high for VFE");
488 				return -EINVAL;
489 			}
490 
491 			/* if sensor pixel clock is not available */
492 			/* set highest possible VFE clock rate */
493 			if (min_rate == 0)
494 				j = clock->nfreqs - 1;
495 
496 			rate = clk_round_rate(clock->clk, clock->freq[j]);
497 			if (rate < 0) {
498 				dev_err(dev, "clk round rate failed: %ld\n",
499 					rate);
500 				return -EINVAL;
501 			}
502 
503 			ret = clk_set_rate(clock->clk, rate);
504 			if (ret < 0) {
505 				dev_err(dev, "clk set rate failed: %d\n", ret);
506 				return ret;
507 			}
508 		}
509 	}
510 
511 	return 0;
512 }
513 
514 /*
515  * vfe_check_clock_rates - Check current clock rates on VFE module
516  * @vfe: VFE device
517  *
518  * Return 0 if current clock rates are suitable for a new pipeline
519  * or a negative error code otherwise
520  */
521 static int vfe_check_clock_rates(struct vfe_device *vfe)
522 {
523 	u64 pixel_clock[VFE_LINE_NUM_MAX];
524 	int i, j;
525 	int ret;
526 
527 	for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
528 		ret = camss_get_pixel_clock(&vfe->line[i].subdev.entity,
529 					    &pixel_clock[i]);
530 		if (ret)
531 			pixel_clock[i] = 0;
532 	}
533 
534 	for (i = 0; i < vfe->nclocks; i++) {
535 		struct camss_clock *clock = &vfe->clock[i];
536 
537 		if (!strcmp(clock->name, "vfe0") ||
538 		    !strcmp(clock->name, "vfe1") ||
539 		    !strcmp(clock->name, "vfe_lite")) {
540 			u64 min_rate = 0;
541 			unsigned long rate;
542 
543 			for (j = VFE_LINE_RDI0; j < vfe->line_num; j++) {
544 				u32 tmp;
545 				u8 bpp;
546 
547 				if (j == VFE_LINE_PIX) {
548 					tmp = pixel_clock[j];
549 				} else {
550 					struct vfe_line *l = &vfe->line[j];
551 
552 					bpp = vfe_get_bpp(l->formats,
553 						l->nformats,
554 						l->fmt[MSM_VFE_PAD_SINK].code);
555 					tmp = pixel_clock[j] * bpp / 64;
556 				}
557 
558 				if (min_rate < tmp)
559 					min_rate = tmp;
560 			}
561 
562 			camss_add_clock_margin(&min_rate);
563 
564 			rate = clk_get_rate(clock->clk);
565 			if (rate < min_rate)
566 				return -EBUSY;
567 		}
568 	}
569 
570 	return 0;
571 }
572 
573 /*
574  * vfe_get - Power up and reset VFE module
575  * @vfe: VFE Device
576  *
577  * Return 0 on success or a negative error code otherwise
578  */
579 int vfe_get(struct vfe_device *vfe)
580 {
581 	int ret;
582 
583 	mutex_lock(&vfe->power_lock);
584 
585 	if (vfe->power_count == 0) {
586 		ret = vfe->ops->pm_domain_on(vfe);
587 		if (ret < 0)
588 			goto error_pm_domain;
589 
590 		ret = pm_runtime_resume_and_get(vfe->camss->dev);
591 		if (ret < 0)
592 			goto error_domain_off;
593 
594 		ret = vfe_set_clock_rates(vfe);
595 		if (ret < 0)
596 			goto error_pm_runtime_get;
597 
598 		ret = camss_enable_clocks(vfe->nclocks, vfe->clock,
599 					  vfe->camss->dev);
600 		if (ret < 0)
601 			goto error_pm_runtime_get;
602 
603 		ret = vfe_reset(vfe);
604 		if (ret < 0)
605 			goto error_reset;
606 
607 		vfe_reset_output_maps(vfe);
608 
609 		vfe_init_outputs(vfe);
610 
611 		vfe->ops->hw_version(vfe);
612 	} else {
613 		ret = vfe_check_clock_rates(vfe);
614 		if (ret < 0)
615 			goto error_pm_domain;
616 	}
617 	vfe->power_count++;
618 
619 	mutex_unlock(&vfe->power_lock);
620 
621 	return 0;
622 
623 error_reset:
624 	camss_disable_clocks(vfe->nclocks, vfe->clock);
625 
626 error_pm_runtime_get:
627 	pm_runtime_put_sync(vfe->camss->dev);
628 error_domain_off:
629 	vfe->ops->pm_domain_off(vfe);
630 
631 error_pm_domain:
632 	mutex_unlock(&vfe->power_lock);
633 
634 	return ret;
635 }
636 
637 /*
638  * vfe_put - Power down VFE module
639  * @vfe: VFE Device
640  */
641 void vfe_put(struct vfe_device *vfe)
642 {
643 	mutex_lock(&vfe->power_lock);
644 
645 	if (vfe->power_count == 0) {
646 		dev_err(vfe->camss->dev, "vfe power off on power_count == 0\n");
647 		goto exit;
648 	} else if (vfe->power_count == 1) {
649 		if (vfe->was_streaming) {
650 			vfe->was_streaming = 0;
651 			vfe->ops->vfe_halt(vfe);
652 		}
653 		camss_disable_clocks(vfe->nclocks, vfe->clock);
654 		pm_runtime_put_sync(vfe->camss->dev);
655 		vfe->ops->pm_domain_off(vfe);
656 	}
657 
658 	vfe->power_count--;
659 
660 exit:
661 	mutex_unlock(&vfe->power_lock);
662 }
663 
664 /*
665  * vfe_flush_buffers - Return all vb2 buffers
666  * @vid: Video device structure
667  * @state: vb2 buffer state of the returned buffers
668  *
669  * Return all buffers to vb2. This includes queued pending buffers (still
670  * unused) and any buffers given to the hardware but again still not used.
671  *
672  * Return 0 on success or a negative error code otherwise
673  */
674 int vfe_flush_buffers(struct camss_video *vid,
675 		      enum vb2_buffer_state state)
676 {
677 	struct vfe_line *line = container_of(vid, struct vfe_line, video_out);
678 	struct vfe_device *vfe = to_vfe(line);
679 	struct vfe_output *output;
680 	unsigned long flags;
681 
682 	output = &line->output;
683 
684 	spin_lock_irqsave(&vfe->output_lock, flags);
685 
686 	vfe_buf_flush_pending(output, state);
687 
688 	if (output->buf[0])
689 		vb2_buffer_done(&output->buf[0]->vb.vb2_buf, state);
690 
691 	if (output->buf[1])
692 		vb2_buffer_done(&output->buf[1]->vb.vb2_buf, state);
693 
694 	if (output->last_buffer) {
695 		vb2_buffer_done(&output->last_buffer->vb.vb2_buf, state);
696 		output->last_buffer = NULL;
697 	}
698 
699 	spin_unlock_irqrestore(&vfe->output_lock, flags);
700 
701 	return 0;
702 }
703 
704 /*
705  * vfe_set_power - Power on/off VFE module
706  * @sd: VFE V4L2 subdevice
707  * @on: Requested power state
708  *
709  * Return 0 on success or a negative error code otherwise
710  */
711 static int vfe_set_power(struct v4l2_subdev *sd, int on)
712 {
713 	struct vfe_line *line = v4l2_get_subdevdata(sd);
714 	struct vfe_device *vfe = to_vfe(line);
715 	int ret;
716 
717 	if (on) {
718 		ret = vfe_get(vfe);
719 		if (ret < 0)
720 			return ret;
721 	} else {
722 		vfe_put(vfe);
723 	}
724 
725 	return 0;
726 }
727 
728 /*
729  * vfe_set_stream - Enable/disable streaming on VFE module
730  * @sd: VFE V4L2 subdevice
731  * @enable: Requested streaming state
732  *
733  * Main configuration of VFE module is triggered here.
734  *
735  * Return 0 on success or a negative error code otherwise
736  */
737 static int vfe_set_stream(struct v4l2_subdev *sd, int enable)
738 {
739 	struct vfe_line *line = v4l2_get_subdevdata(sd);
740 	struct vfe_device *vfe = to_vfe(line);
741 	int ret;
742 
743 	if (enable) {
744 		line->output.state = VFE_OUTPUT_RESERVED;
745 		ret = vfe->ops->vfe_enable(line);
746 		if (ret < 0)
747 			dev_err(vfe->camss->dev,
748 				"Failed to enable vfe outputs\n");
749 	} else {
750 		ret = vfe->ops->vfe_disable(line);
751 		if (ret < 0)
752 			dev_err(vfe->camss->dev,
753 				"Failed to disable vfe outputs\n");
754 	}
755 
756 	return ret;
757 }
758 
759 /*
760  * __vfe_get_format - Get pointer to format structure
761  * @line: VFE line
762  * @cfg: V4L2 subdev pad configuration
763  * @pad: pad from which format is requested
764  * @which: TRY or ACTIVE format
765  *
766  * Return pointer to TRY or ACTIVE format structure
767  */
768 static struct v4l2_mbus_framefmt *
769 __vfe_get_format(struct vfe_line *line,
770 		 struct v4l2_subdev_state *sd_state,
771 		 unsigned int pad,
772 		 enum v4l2_subdev_format_whence which)
773 {
774 	if (which == V4L2_SUBDEV_FORMAT_TRY)
775 		return v4l2_subdev_get_try_format(&line->subdev, sd_state,
776 						  pad);
777 
778 	return &line->fmt[pad];
779 }
780 
781 /*
782  * __vfe_get_compose - Get pointer to compose selection structure
783  * @line: VFE line
784  * @cfg: V4L2 subdev pad configuration
785  * @which: TRY or ACTIVE format
786  *
787  * Return pointer to TRY or ACTIVE compose rectangle structure
788  */
789 static struct v4l2_rect *
790 __vfe_get_compose(struct vfe_line *line,
791 		  struct v4l2_subdev_state *sd_state,
792 		  enum v4l2_subdev_format_whence which)
793 {
794 	if (which == V4L2_SUBDEV_FORMAT_TRY)
795 		return v4l2_subdev_get_try_compose(&line->subdev, sd_state,
796 						   MSM_VFE_PAD_SINK);
797 
798 	return &line->compose;
799 }
800 
801 /*
802  * __vfe_get_crop - Get pointer to crop selection structure
803  * @line: VFE line
804  * @cfg: V4L2 subdev pad configuration
805  * @which: TRY or ACTIVE format
806  *
807  * Return pointer to TRY or ACTIVE crop rectangle structure
808  */
809 static struct v4l2_rect *
810 __vfe_get_crop(struct vfe_line *line,
811 	       struct v4l2_subdev_state *sd_state,
812 	       enum v4l2_subdev_format_whence which)
813 {
814 	if (which == V4L2_SUBDEV_FORMAT_TRY)
815 		return v4l2_subdev_get_try_crop(&line->subdev, sd_state,
816 						MSM_VFE_PAD_SRC);
817 
818 	return &line->crop;
819 }
820 
821 /*
822  * vfe_try_format - Handle try format by pad subdev method
823  * @line: VFE line
824  * @cfg: V4L2 subdev pad configuration
825  * @pad: pad on which format is requested
826  * @fmt: pointer to v4l2 format structure
827  * @which: wanted subdev format
828  */
829 static void vfe_try_format(struct vfe_line *line,
830 			   struct v4l2_subdev_state *sd_state,
831 			   unsigned int pad,
832 			   struct v4l2_mbus_framefmt *fmt,
833 			   enum v4l2_subdev_format_whence which)
834 {
835 	unsigned int i;
836 	u32 code;
837 
838 	switch (pad) {
839 	case MSM_VFE_PAD_SINK:
840 		/* Set format on sink pad */
841 
842 		for (i = 0; i < line->nformats; i++)
843 			if (fmt->code == line->formats[i].code)
844 				break;
845 
846 		/* If not found, use UYVY as default */
847 		if (i >= line->nformats)
848 			fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
849 
850 		fmt->width = clamp_t(u32, fmt->width, 1, 8191);
851 		fmt->height = clamp_t(u32, fmt->height, 1, 8191);
852 
853 		fmt->field = V4L2_FIELD_NONE;
854 		fmt->colorspace = V4L2_COLORSPACE_SRGB;
855 
856 		break;
857 
858 	case MSM_VFE_PAD_SRC:
859 		/* Set and return a format same as sink pad */
860 		code = fmt->code;
861 
862 		*fmt = *__vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK,
863 					 which);
864 
865 		fmt->code = vfe_src_pad_code(line, fmt->code, 0, code);
866 
867 		if (line->id == VFE_LINE_PIX) {
868 			struct v4l2_rect *rect;
869 
870 			rect = __vfe_get_crop(line, sd_state, which);
871 
872 			fmt->width = rect->width;
873 			fmt->height = rect->height;
874 		}
875 
876 		break;
877 	}
878 
879 	fmt->colorspace = V4L2_COLORSPACE_SRGB;
880 }
881 
882 /*
883  * vfe_try_compose - Handle try compose selection by pad subdev method
884  * @line: VFE line
885  * @cfg: V4L2 subdev pad configuration
886  * @rect: pointer to v4l2 rect structure
887  * @which: wanted subdev format
888  */
889 static void vfe_try_compose(struct vfe_line *line,
890 			    struct v4l2_subdev_state *sd_state,
891 			    struct v4l2_rect *rect,
892 			    enum v4l2_subdev_format_whence which)
893 {
894 	struct v4l2_mbus_framefmt *fmt;
895 
896 	fmt = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK, which);
897 
898 	if (rect->width > fmt->width)
899 		rect->width = fmt->width;
900 
901 	if (rect->height > fmt->height)
902 		rect->height = fmt->height;
903 
904 	if (fmt->width > rect->width * SCALER_RATIO_MAX)
905 		rect->width = (fmt->width + SCALER_RATIO_MAX - 1) /
906 							SCALER_RATIO_MAX;
907 
908 	rect->width &= ~0x1;
909 
910 	if (fmt->height > rect->height * SCALER_RATIO_MAX)
911 		rect->height = (fmt->height + SCALER_RATIO_MAX - 1) /
912 							SCALER_RATIO_MAX;
913 
914 	if (rect->width < 16)
915 		rect->width = 16;
916 
917 	if (rect->height < 4)
918 		rect->height = 4;
919 }
920 
921 /*
922  * vfe_try_crop - Handle try crop selection by pad subdev method
923  * @line: VFE line
924  * @cfg: V4L2 subdev pad configuration
925  * @rect: pointer to v4l2 rect structure
926  * @which: wanted subdev format
927  */
928 static void vfe_try_crop(struct vfe_line *line,
929 			 struct v4l2_subdev_state *sd_state,
930 			 struct v4l2_rect *rect,
931 			 enum v4l2_subdev_format_whence which)
932 {
933 	struct v4l2_rect *compose;
934 
935 	compose = __vfe_get_compose(line, sd_state, which);
936 
937 	if (rect->width > compose->width)
938 		rect->width = compose->width;
939 
940 	if (rect->width + rect->left > compose->width)
941 		rect->left = compose->width - rect->width;
942 
943 	if (rect->height > compose->height)
944 		rect->height = compose->height;
945 
946 	if (rect->height + rect->top > compose->height)
947 		rect->top = compose->height - rect->height;
948 
949 	/* wm in line based mode writes multiple of 16 horizontally */
950 	rect->left += (rect->width & 0xf) >> 1;
951 	rect->width &= ~0xf;
952 
953 	if (rect->width < 16) {
954 		rect->left = 0;
955 		rect->width = 16;
956 	}
957 
958 	if (rect->height < 4) {
959 		rect->top = 0;
960 		rect->height = 4;
961 	}
962 }
963 
964 /*
965  * vfe_enum_mbus_code - Handle pixel format enumeration
966  * @sd: VFE V4L2 subdevice
967  * @cfg: V4L2 subdev pad configuration
968  * @code: pointer to v4l2_subdev_mbus_code_enum structure
969  *
970  * return -EINVAL or zero on success
971  */
972 static int vfe_enum_mbus_code(struct v4l2_subdev *sd,
973 			      struct v4l2_subdev_state *sd_state,
974 			      struct v4l2_subdev_mbus_code_enum *code)
975 {
976 	struct vfe_line *line = v4l2_get_subdevdata(sd);
977 
978 	if (code->pad == MSM_VFE_PAD_SINK) {
979 		if (code->index >= line->nformats)
980 			return -EINVAL;
981 
982 		code->code = line->formats[code->index].code;
983 	} else {
984 		struct v4l2_mbus_framefmt *sink_fmt;
985 
986 		sink_fmt = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK,
987 					    code->which);
988 
989 		code->code = vfe_src_pad_code(line, sink_fmt->code,
990 					      code->index, 0);
991 		if (!code->code)
992 			return -EINVAL;
993 	}
994 
995 	return 0;
996 }
997 
998 /*
999  * vfe_enum_frame_size - Handle frame size enumeration
1000  * @sd: VFE V4L2 subdevice
1001  * @cfg: V4L2 subdev pad configuration
1002  * @fse: pointer to v4l2_subdev_frame_size_enum structure
1003  *
1004  * Return -EINVAL or zero on success
1005  */
1006 static int vfe_enum_frame_size(struct v4l2_subdev *sd,
1007 			       struct v4l2_subdev_state *sd_state,
1008 			       struct v4l2_subdev_frame_size_enum *fse)
1009 {
1010 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1011 	struct v4l2_mbus_framefmt format;
1012 
1013 	if (fse->index != 0)
1014 		return -EINVAL;
1015 
1016 	format.code = fse->code;
1017 	format.width = 1;
1018 	format.height = 1;
1019 	vfe_try_format(line, sd_state, fse->pad, &format, fse->which);
1020 	fse->min_width = format.width;
1021 	fse->min_height = format.height;
1022 
1023 	if (format.code != fse->code)
1024 		return -EINVAL;
1025 
1026 	format.code = fse->code;
1027 	format.width = -1;
1028 	format.height = -1;
1029 	vfe_try_format(line, sd_state, fse->pad, &format, fse->which);
1030 	fse->max_width = format.width;
1031 	fse->max_height = format.height;
1032 
1033 	return 0;
1034 }
1035 
1036 /*
1037  * vfe_get_format - Handle get format by pads subdev method
1038  * @sd: VFE V4L2 subdevice
1039  * @cfg: V4L2 subdev pad configuration
1040  * @fmt: pointer to v4l2 subdev format structure
1041  *
1042  * Return -EINVAL or zero on success
1043  */
1044 static int vfe_get_format(struct v4l2_subdev *sd,
1045 			  struct v4l2_subdev_state *sd_state,
1046 			  struct v4l2_subdev_format *fmt)
1047 {
1048 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1049 	struct v4l2_mbus_framefmt *format;
1050 
1051 	format = __vfe_get_format(line, sd_state, fmt->pad, fmt->which);
1052 	if (format == NULL)
1053 		return -EINVAL;
1054 
1055 	fmt->format = *format;
1056 
1057 	return 0;
1058 }
1059 
1060 static int vfe_set_selection(struct v4l2_subdev *sd,
1061 			     struct v4l2_subdev_state *sd_state,
1062 			     struct v4l2_subdev_selection *sel);
1063 
1064 /*
1065  * vfe_set_format - Handle set format by pads subdev method
1066  * @sd: VFE V4L2 subdevice
1067  * @cfg: V4L2 subdev pad configuration
1068  * @fmt: pointer to v4l2 subdev format structure
1069  *
1070  * Return -EINVAL or zero on success
1071  */
1072 static int vfe_set_format(struct v4l2_subdev *sd,
1073 			  struct v4l2_subdev_state *sd_state,
1074 			  struct v4l2_subdev_format *fmt)
1075 {
1076 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1077 	struct v4l2_mbus_framefmt *format;
1078 
1079 	format = __vfe_get_format(line, sd_state, fmt->pad, fmt->which);
1080 	if (format == NULL)
1081 		return -EINVAL;
1082 
1083 	vfe_try_format(line, sd_state, fmt->pad, &fmt->format, fmt->which);
1084 	*format = fmt->format;
1085 
1086 	if (fmt->pad == MSM_VFE_PAD_SINK) {
1087 		struct v4l2_subdev_selection sel = { 0 };
1088 		int ret;
1089 
1090 		/* Propagate the format from sink to source */
1091 		format = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SRC,
1092 					  fmt->which);
1093 
1094 		*format = fmt->format;
1095 		vfe_try_format(line, sd_state, MSM_VFE_PAD_SRC, format,
1096 			       fmt->which);
1097 
1098 		if (line->id != VFE_LINE_PIX)
1099 			return 0;
1100 
1101 		/* Reset sink pad compose selection */
1102 		sel.which = fmt->which;
1103 		sel.pad = MSM_VFE_PAD_SINK;
1104 		sel.target = V4L2_SEL_TGT_COMPOSE;
1105 		sel.r.width = fmt->format.width;
1106 		sel.r.height = fmt->format.height;
1107 		ret = vfe_set_selection(sd, sd_state, &sel);
1108 		if (ret < 0)
1109 			return ret;
1110 	}
1111 
1112 	return 0;
1113 }
1114 
1115 /*
1116  * vfe_get_selection - Handle get selection by pads subdev method
1117  * @sd: VFE V4L2 subdevice
1118  * @cfg: V4L2 subdev pad configuration
1119  * @sel: pointer to v4l2 subdev selection structure
1120  *
1121  * Return -EINVAL or zero on success
1122  */
1123 static int vfe_get_selection(struct v4l2_subdev *sd,
1124 			     struct v4l2_subdev_state *sd_state,
1125 			     struct v4l2_subdev_selection *sel)
1126 {
1127 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1128 	struct v4l2_subdev_format fmt = { 0 };
1129 	struct v4l2_rect *rect;
1130 	int ret;
1131 
1132 	if (line->id != VFE_LINE_PIX)
1133 		return -EINVAL;
1134 
1135 	if (sel->pad == MSM_VFE_PAD_SINK)
1136 		switch (sel->target) {
1137 		case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1138 			fmt.pad = sel->pad;
1139 			fmt.which = sel->which;
1140 			ret = vfe_get_format(sd, sd_state, &fmt);
1141 			if (ret < 0)
1142 				return ret;
1143 
1144 			sel->r.left = 0;
1145 			sel->r.top = 0;
1146 			sel->r.width = fmt.format.width;
1147 			sel->r.height = fmt.format.height;
1148 			break;
1149 		case V4L2_SEL_TGT_COMPOSE:
1150 			rect = __vfe_get_compose(line, sd_state, sel->which);
1151 			if (rect == NULL)
1152 				return -EINVAL;
1153 
1154 			sel->r = *rect;
1155 			break;
1156 		default:
1157 			return -EINVAL;
1158 		}
1159 	else if (sel->pad == MSM_VFE_PAD_SRC)
1160 		switch (sel->target) {
1161 		case V4L2_SEL_TGT_CROP_BOUNDS:
1162 			rect = __vfe_get_compose(line, sd_state, sel->which);
1163 			if (rect == NULL)
1164 				return -EINVAL;
1165 
1166 			sel->r.left = rect->left;
1167 			sel->r.top = rect->top;
1168 			sel->r.width = rect->width;
1169 			sel->r.height = rect->height;
1170 			break;
1171 		case V4L2_SEL_TGT_CROP:
1172 			rect = __vfe_get_crop(line, sd_state, sel->which);
1173 			if (rect == NULL)
1174 				return -EINVAL;
1175 
1176 			sel->r = *rect;
1177 			break;
1178 		default:
1179 			return -EINVAL;
1180 		}
1181 
1182 	return 0;
1183 }
1184 
1185 /*
1186  * vfe_set_selection - Handle set selection by pads subdev method
1187  * @sd: VFE V4L2 subdevice
1188  * @cfg: V4L2 subdev pad configuration
1189  * @sel: pointer to v4l2 subdev selection structure
1190  *
1191  * Return -EINVAL or zero on success
1192  */
1193 static int vfe_set_selection(struct v4l2_subdev *sd,
1194 			     struct v4l2_subdev_state *sd_state,
1195 			     struct v4l2_subdev_selection *sel)
1196 {
1197 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1198 	struct v4l2_rect *rect;
1199 	int ret;
1200 
1201 	if (line->id != VFE_LINE_PIX)
1202 		return -EINVAL;
1203 
1204 	if (sel->target == V4L2_SEL_TGT_COMPOSE &&
1205 		sel->pad == MSM_VFE_PAD_SINK) {
1206 		struct v4l2_subdev_selection crop = { 0 };
1207 
1208 		rect = __vfe_get_compose(line, sd_state, sel->which);
1209 		if (rect == NULL)
1210 			return -EINVAL;
1211 
1212 		vfe_try_compose(line, sd_state, &sel->r, sel->which);
1213 		*rect = sel->r;
1214 
1215 		/* Reset source crop selection */
1216 		crop.which = sel->which;
1217 		crop.pad = MSM_VFE_PAD_SRC;
1218 		crop.target = V4L2_SEL_TGT_CROP;
1219 		crop.r = *rect;
1220 		ret = vfe_set_selection(sd, sd_state, &crop);
1221 	} else if (sel->target == V4L2_SEL_TGT_CROP &&
1222 		sel->pad == MSM_VFE_PAD_SRC) {
1223 		struct v4l2_subdev_format fmt = { 0 };
1224 
1225 		rect = __vfe_get_crop(line, sd_state, sel->which);
1226 		if (rect == NULL)
1227 			return -EINVAL;
1228 
1229 		vfe_try_crop(line, sd_state, &sel->r, sel->which);
1230 		*rect = sel->r;
1231 
1232 		/* Reset source pad format width and height */
1233 		fmt.which = sel->which;
1234 		fmt.pad = MSM_VFE_PAD_SRC;
1235 		ret = vfe_get_format(sd, sd_state, &fmt);
1236 		if (ret < 0)
1237 			return ret;
1238 
1239 		fmt.format.width = rect->width;
1240 		fmt.format.height = rect->height;
1241 		ret = vfe_set_format(sd, sd_state, &fmt);
1242 	} else {
1243 		ret = -EINVAL;
1244 	}
1245 
1246 	return ret;
1247 }
1248 
1249 /*
1250  * vfe_init_formats - Initialize formats on all pads
1251  * @sd: VFE V4L2 subdevice
1252  * @fh: V4L2 subdev file handle
1253  *
1254  * Initialize all pad formats with default values.
1255  *
1256  * Return 0 on success or a negative error code otherwise
1257  */
1258 static int vfe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1259 {
1260 	struct v4l2_subdev_format format = {
1261 		.pad = MSM_VFE_PAD_SINK,
1262 		.which = fh ? V4L2_SUBDEV_FORMAT_TRY :
1263 			      V4L2_SUBDEV_FORMAT_ACTIVE,
1264 		.format = {
1265 			.code = MEDIA_BUS_FMT_UYVY8_2X8,
1266 			.width = 1920,
1267 			.height = 1080
1268 		}
1269 	};
1270 
1271 	return vfe_set_format(sd, fh ? fh->state : NULL, &format);
1272 }
1273 
1274 /*
1275  * msm_vfe_subdev_init - Initialize VFE device structure and resources
1276  * @vfe: VFE device
1277  * @res: VFE module resources table
1278  *
1279  * Return 0 on success or a negative error code otherwise
1280  */
1281 int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
1282 			const struct resources *res, u8 id)
1283 {
1284 	struct device *dev = camss->dev;
1285 	struct platform_device *pdev = to_platform_device(dev);
1286 	int i, j;
1287 	int ret;
1288 
1289 	switch (camss->version) {
1290 	case CAMSS_8x16:
1291 		vfe->ops = &vfe_ops_4_1;
1292 		break;
1293 	case CAMSS_8x96:
1294 		vfe->ops = &vfe_ops_4_7;
1295 		break;
1296 	case CAMSS_660:
1297 		vfe->ops = &vfe_ops_4_8;
1298 		break;
1299 	case CAMSS_845:
1300 		vfe->ops = &vfe_ops_170;
1301 		break;
1302 	case CAMSS_8250:
1303 		vfe->ops = &vfe_ops_480;
1304 		break;
1305 	default:
1306 		return -EINVAL;
1307 	}
1308 	vfe->ops->subdev_init(dev, vfe);
1309 
1310 	/* Memory */
1311 
1312 	vfe->base = devm_platform_ioremap_resource_byname(pdev, res->reg[0]);
1313 	if (IS_ERR(vfe->base)) {
1314 		dev_err(dev, "could not map memory\n");
1315 		return PTR_ERR(vfe->base);
1316 	}
1317 
1318 	/* Interrupt */
1319 
1320 	ret = platform_get_irq_byname(pdev, res->interrupt[0]);
1321 	if (ret < 0)
1322 		return ret;
1323 
1324 	vfe->irq = ret;
1325 	snprintf(vfe->irq_name, sizeof(vfe->irq_name), "%s_%s%d",
1326 		 dev_name(dev), MSM_VFE_NAME, id);
1327 	ret = devm_request_irq(dev, vfe->irq, vfe->ops->isr,
1328 			       IRQF_TRIGGER_RISING, vfe->irq_name, vfe);
1329 	if (ret < 0) {
1330 		dev_err(dev, "request_irq failed: %d\n", ret);
1331 		return ret;
1332 	}
1333 
1334 	/* Clocks */
1335 
1336 	vfe->nclocks = 0;
1337 	while (res->clock[vfe->nclocks])
1338 		vfe->nclocks++;
1339 
1340 	vfe->clock = devm_kcalloc(dev, vfe->nclocks, sizeof(*vfe->clock),
1341 				  GFP_KERNEL);
1342 	if (!vfe->clock)
1343 		return -ENOMEM;
1344 
1345 	for (i = 0; i < vfe->nclocks; i++) {
1346 		struct camss_clock *clock = &vfe->clock[i];
1347 
1348 		clock->clk = devm_clk_get(dev, res->clock[i]);
1349 		if (IS_ERR(clock->clk))
1350 			return PTR_ERR(clock->clk);
1351 
1352 		clock->name = res->clock[i];
1353 
1354 		clock->nfreqs = 0;
1355 		while (res->clock_rate[i][clock->nfreqs])
1356 			clock->nfreqs++;
1357 
1358 		if (!clock->nfreqs) {
1359 			clock->freq = NULL;
1360 			continue;
1361 		}
1362 
1363 		clock->freq = devm_kcalloc(dev,
1364 					   clock->nfreqs,
1365 					   sizeof(*clock->freq),
1366 					   GFP_KERNEL);
1367 		if (!clock->freq)
1368 			return -ENOMEM;
1369 
1370 		for (j = 0; j < clock->nfreqs; j++)
1371 			clock->freq[j] = res->clock_rate[i][j];
1372 	}
1373 
1374 	mutex_init(&vfe->power_lock);
1375 	vfe->power_count = 0;
1376 
1377 	mutex_init(&vfe->stream_lock);
1378 	vfe->stream_count = 0;
1379 
1380 	spin_lock_init(&vfe->output_lock);
1381 
1382 	vfe->camss = camss;
1383 	vfe->id = id;
1384 	vfe->reg_update = 0;
1385 
1386 	for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
1387 		struct vfe_line *l = &vfe->line[i];
1388 
1389 		l->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1390 		l->video_out.camss = camss;
1391 		l->id = i;
1392 		init_completion(&l->output.sof);
1393 		init_completion(&l->output.reg_update);
1394 
1395 		if (camss->version == CAMSS_8x16) {
1396 			if (i == VFE_LINE_PIX) {
1397 				l->formats = formats_pix_8x16;
1398 				l->nformats = ARRAY_SIZE(formats_pix_8x16);
1399 			} else {
1400 				l->formats = formats_rdi_8x16;
1401 				l->nformats = ARRAY_SIZE(formats_rdi_8x16);
1402 			}
1403 		} else if (camss->version == CAMSS_8x96 ||
1404 			   camss->version == CAMSS_660) {
1405 			if (i == VFE_LINE_PIX) {
1406 				l->formats = formats_pix_8x96;
1407 				l->nformats = ARRAY_SIZE(formats_pix_8x96);
1408 			} else {
1409 				l->formats = formats_rdi_8x96;
1410 				l->nformats = ARRAY_SIZE(formats_rdi_8x96);
1411 			}
1412 		} else if (camss->version == CAMSS_845 ||
1413 			   camss->version == CAMSS_8250) {
1414 			l->formats = formats_rdi_845;
1415 			l->nformats = ARRAY_SIZE(formats_rdi_845);
1416 		} else {
1417 			return -EINVAL;
1418 		}
1419 	}
1420 
1421 	init_completion(&vfe->reset_complete);
1422 	init_completion(&vfe->halt_complete);
1423 
1424 	return 0;
1425 }
1426 
1427 /*
1428  * vfe_link_setup - Setup VFE connections
1429  * @entity: Pointer to media entity structure
1430  * @local: Pointer to local pad
1431  * @remote: Pointer to remote pad
1432  * @flags: Link flags
1433  *
1434  * Return 0 on success
1435  */
1436 static int vfe_link_setup(struct media_entity *entity,
1437 			  const struct media_pad *local,
1438 			  const struct media_pad *remote, u32 flags)
1439 {
1440 	if (flags & MEDIA_LNK_FL_ENABLED)
1441 		if (media_pad_remote_pad_first(local))
1442 			return -EBUSY;
1443 
1444 	return 0;
1445 }
1446 
1447 static const struct v4l2_subdev_core_ops vfe_core_ops = {
1448 	.s_power = vfe_set_power,
1449 };
1450 
1451 static const struct v4l2_subdev_video_ops vfe_video_ops = {
1452 	.s_stream = vfe_set_stream,
1453 };
1454 
1455 static const struct v4l2_subdev_pad_ops vfe_pad_ops = {
1456 	.enum_mbus_code = vfe_enum_mbus_code,
1457 	.enum_frame_size = vfe_enum_frame_size,
1458 	.get_fmt = vfe_get_format,
1459 	.set_fmt = vfe_set_format,
1460 	.get_selection = vfe_get_selection,
1461 	.set_selection = vfe_set_selection,
1462 };
1463 
1464 static const struct v4l2_subdev_ops vfe_v4l2_ops = {
1465 	.core = &vfe_core_ops,
1466 	.video = &vfe_video_ops,
1467 	.pad = &vfe_pad_ops,
1468 };
1469 
1470 static const struct v4l2_subdev_internal_ops vfe_v4l2_internal_ops = {
1471 	.open = vfe_init_formats,
1472 };
1473 
1474 static const struct media_entity_operations vfe_media_ops = {
1475 	.link_setup = vfe_link_setup,
1476 	.link_validate = v4l2_subdev_link_validate,
1477 };
1478 
1479 /*
1480  * msm_vfe_register_entities - Register subdev node for VFE module
1481  * @vfe: VFE device
1482  * @v4l2_dev: V4L2 device
1483  *
1484  * Initialize and register a subdev node for the VFE module. Then
1485  * call msm_video_register() to register the video device node which
1486  * will be connected to this subdev node. Then actually create the
1487  * media link between them.
1488  *
1489  * Return 0 on success or a negative error code otherwise
1490  */
1491 int msm_vfe_register_entities(struct vfe_device *vfe,
1492 			      struct v4l2_device *v4l2_dev)
1493 {
1494 	struct device *dev = vfe->camss->dev;
1495 	struct v4l2_subdev *sd;
1496 	struct media_pad *pads;
1497 	struct camss_video *video_out;
1498 	int ret;
1499 	int i;
1500 
1501 	for (i = 0; i < vfe->line_num; i++) {
1502 		char name[32];
1503 
1504 		sd = &vfe->line[i].subdev;
1505 		pads = vfe->line[i].pads;
1506 		video_out = &vfe->line[i].video_out;
1507 
1508 		v4l2_subdev_init(sd, &vfe_v4l2_ops);
1509 		sd->internal_ops = &vfe_v4l2_internal_ops;
1510 		sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1511 		if (i == VFE_LINE_PIX)
1512 			snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s",
1513 				 MSM_VFE_NAME, vfe->id, "pix");
1514 		else
1515 			snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s%d",
1516 				 MSM_VFE_NAME, vfe->id, "rdi", i);
1517 
1518 		v4l2_set_subdevdata(sd, &vfe->line[i]);
1519 
1520 		ret = vfe_init_formats(sd, NULL);
1521 		if (ret < 0) {
1522 			dev_err(dev, "Failed to init format: %d\n", ret);
1523 			goto error_init;
1524 		}
1525 
1526 		pads[MSM_VFE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1527 		pads[MSM_VFE_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
1528 
1529 		sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1530 		sd->entity.ops = &vfe_media_ops;
1531 		ret = media_entity_pads_init(&sd->entity, MSM_VFE_PADS_NUM,
1532 					     pads);
1533 		if (ret < 0) {
1534 			dev_err(dev, "Failed to init media entity: %d\n", ret);
1535 			goto error_init;
1536 		}
1537 
1538 		ret = v4l2_device_register_subdev(v4l2_dev, sd);
1539 		if (ret < 0) {
1540 			dev_err(dev, "Failed to register subdev: %d\n", ret);
1541 			goto error_reg_subdev;
1542 		}
1543 
1544 		video_out->ops = &vfe->video_ops;
1545 		if (vfe->camss->version == CAMSS_845 ||
1546 		    vfe->camss->version == CAMSS_8250)
1547 			video_out->bpl_alignment = 16;
1548 		else
1549 			video_out->bpl_alignment = 8;
1550 		video_out->line_based = 0;
1551 		if (i == VFE_LINE_PIX) {
1552 			video_out->bpl_alignment = 16;
1553 			video_out->line_based = 1;
1554 		}
1555 		snprintf(name, ARRAY_SIZE(name), "%s%d_%s%d",
1556 			 MSM_VFE_NAME, vfe->id, "video", i);
1557 		ret = msm_video_register(video_out, v4l2_dev, name,
1558 					 i == VFE_LINE_PIX ? 1 : 0);
1559 		if (ret < 0) {
1560 			dev_err(dev, "Failed to register video node: %d\n",
1561 				ret);
1562 			goto error_reg_video;
1563 		}
1564 
1565 		ret = media_create_pad_link(
1566 				&sd->entity, MSM_VFE_PAD_SRC,
1567 				&video_out->vdev.entity, 0,
1568 				MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
1569 		if (ret < 0) {
1570 			dev_err(dev, "Failed to link %s->%s entities: %d\n",
1571 				sd->entity.name, video_out->vdev.entity.name,
1572 				ret);
1573 			goto error_link;
1574 		}
1575 	}
1576 
1577 	return 0;
1578 
1579 error_link:
1580 	msm_video_unregister(video_out);
1581 
1582 error_reg_video:
1583 	v4l2_device_unregister_subdev(sd);
1584 
1585 error_reg_subdev:
1586 	media_entity_cleanup(&sd->entity);
1587 
1588 error_init:
1589 	for (i--; i >= 0; i--) {
1590 		sd = &vfe->line[i].subdev;
1591 		video_out = &vfe->line[i].video_out;
1592 
1593 		msm_video_unregister(video_out);
1594 		v4l2_device_unregister_subdev(sd);
1595 		media_entity_cleanup(&sd->entity);
1596 	}
1597 
1598 	return ret;
1599 }
1600 
1601 /*
1602  * msm_vfe_unregister_entities - Unregister VFE module subdev node
1603  * @vfe: VFE device
1604  */
1605 void msm_vfe_unregister_entities(struct vfe_device *vfe)
1606 {
1607 	int i;
1608 
1609 	mutex_destroy(&vfe->power_lock);
1610 	mutex_destroy(&vfe->stream_lock);
1611 
1612 	for (i = 0; i < vfe->line_num; i++) {
1613 		struct v4l2_subdev *sd = &vfe->line[i].subdev;
1614 		struct camss_video *video_out = &vfe->line[i].video_out;
1615 
1616 		msm_video_unregister(video_out);
1617 		v4l2_device_unregister_subdev(sd);
1618 		media_entity_cleanup(&sd->entity);
1619 	}
1620 }
1621