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 			u64 min_rate = 0;
540 			unsigned long rate;
541 
542 			for (j = VFE_LINE_RDI0; j < vfe->line_num; j++) {
543 				u32 tmp;
544 				u8 bpp;
545 
546 				if (j == VFE_LINE_PIX) {
547 					tmp = pixel_clock[j];
548 				} else {
549 					struct vfe_line *l = &vfe->line[j];
550 
551 					bpp = vfe_get_bpp(l->formats,
552 						l->nformats,
553 						l->fmt[MSM_VFE_PAD_SINK].code);
554 					tmp = pixel_clock[j] * bpp / 64;
555 				}
556 
557 				if (min_rate < tmp)
558 					min_rate = tmp;
559 			}
560 
561 			camss_add_clock_margin(&min_rate);
562 
563 			rate = clk_get_rate(clock->clk);
564 			if (rate < min_rate)
565 				return -EBUSY;
566 		}
567 	}
568 
569 	return 0;
570 }
571 
572 /*
573  * vfe_get - Power up and reset VFE module
574  * @vfe: VFE Device
575  *
576  * Return 0 on success or a negative error code otherwise
577  */
578 int vfe_get(struct vfe_device *vfe)
579 {
580 	int ret;
581 
582 	mutex_lock(&vfe->power_lock);
583 
584 	if (vfe->power_count == 0) {
585 		ret = vfe->ops->pm_domain_on(vfe);
586 		if (ret < 0)
587 			goto error_pm_domain;
588 
589 		ret = pm_runtime_resume_and_get(vfe->camss->dev);
590 		if (ret < 0)
591 			goto error_domain_off;
592 
593 		ret = vfe_set_clock_rates(vfe);
594 		if (ret < 0)
595 			goto error_pm_runtime_get;
596 
597 		ret = camss_enable_clocks(vfe->nclocks, vfe->clock,
598 					  vfe->camss->dev);
599 		if (ret < 0)
600 			goto error_pm_runtime_get;
601 
602 		ret = vfe_reset(vfe);
603 		if (ret < 0)
604 			goto error_reset;
605 
606 		vfe_reset_output_maps(vfe);
607 
608 		vfe_init_outputs(vfe);
609 
610 		vfe->ops->hw_version(vfe);
611 	} else {
612 		ret = vfe_check_clock_rates(vfe);
613 		if (ret < 0)
614 			goto error_pm_runtime_get;
615 	}
616 	vfe->power_count++;
617 
618 	mutex_unlock(&vfe->power_lock);
619 
620 	return 0;
621 
622 error_reset:
623 	camss_disable_clocks(vfe->nclocks, vfe->clock);
624 
625 error_pm_runtime_get:
626 	pm_runtime_put_sync(vfe->camss->dev);
627 error_domain_off:
628 	vfe->ops->pm_domain_off(vfe);
629 
630 error_pm_domain:
631 	mutex_unlock(&vfe->power_lock);
632 
633 	return ret;
634 }
635 
636 /*
637  * vfe_put - Power down VFE module
638  * @vfe: VFE Device
639  */
640 void vfe_put(struct vfe_device *vfe)
641 {
642 	mutex_lock(&vfe->power_lock);
643 
644 	if (vfe->power_count == 0) {
645 		dev_err(vfe->camss->dev, "vfe power off on power_count == 0\n");
646 		goto exit;
647 	} else if (vfe->power_count == 1) {
648 		if (vfe->was_streaming) {
649 			vfe->was_streaming = 0;
650 			vfe->ops->vfe_halt(vfe);
651 		}
652 		camss_disable_clocks(vfe->nclocks, vfe->clock);
653 		pm_runtime_put_sync(vfe->camss->dev);
654 		vfe->ops->pm_domain_off(vfe);
655 	}
656 
657 	vfe->power_count--;
658 
659 exit:
660 	mutex_unlock(&vfe->power_lock);
661 }
662 
663 /*
664  * vfe_flush_buffers - Return all vb2 buffers
665  * @vid: Video device structure
666  * @state: vb2 buffer state of the returned buffers
667  *
668  * Return all buffers to vb2. This includes queued pending buffers (still
669  * unused) and any buffers given to the hardware but again still not used.
670  *
671  * Return 0 on success or a negative error code otherwise
672  */
673 int vfe_flush_buffers(struct camss_video *vid,
674 		      enum vb2_buffer_state state)
675 {
676 	struct vfe_line *line = container_of(vid, struct vfe_line, video_out);
677 	struct vfe_device *vfe = to_vfe(line);
678 	struct vfe_output *output;
679 	unsigned long flags;
680 
681 	output = &line->output;
682 
683 	spin_lock_irqsave(&vfe->output_lock, flags);
684 
685 	vfe_buf_flush_pending(output, state);
686 
687 	if (output->buf[0])
688 		vb2_buffer_done(&output->buf[0]->vb.vb2_buf, state);
689 
690 	if (output->buf[1])
691 		vb2_buffer_done(&output->buf[1]->vb.vb2_buf, state);
692 
693 	if (output->last_buffer) {
694 		vb2_buffer_done(&output->last_buffer->vb.vb2_buf, state);
695 		output->last_buffer = NULL;
696 	}
697 
698 	spin_unlock_irqrestore(&vfe->output_lock, flags);
699 
700 	return 0;
701 }
702 
703 /*
704  * vfe_set_power - Power on/off VFE module
705  * @sd: VFE V4L2 subdevice
706  * @on: Requested power state
707  *
708  * Return 0 on success or a negative error code otherwise
709  */
710 static int vfe_set_power(struct v4l2_subdev *sd, int on)
711 {
712 	struct vfe_line *line = v4l2_get_subdevdata(sd);
713 	struct vfe_device *vfe = to_vfe(line);
714 	int ret;
715 
716 	if (on) {
717 		ret = vfe_get(vfe);
718 		if (ret < 0)
719 			return ret;
720 	} else {
721 		vfe_put(vfe);
722 	}
723 
724 	return 0;
725 }
726 
727 /*
728  * vfe_set_stream - Enable/disable streaming on VFE module
729  * @sd: VFE V4L2 subdevice
730  * @enable: Requested streaming state
731  *
732  * Main configuration of VFE module is triggered here.
733  *
734  * Return 0 on success or a negative error code otherwise
735  */
736 static int vfe_set_stream(struct v4l2_subdev *sd, int enable)
737 {
738 	struct vfe_line *line = v4l2_get_subdevdata(sd);
739 	struct vfe_device *vfe = to_vfe(line);
740 	int ret;
741 
742 	if (enable) {
743 		line->output.state = VFE_OUTPUT_RESERVED;
744 		ret = vfe->ops->vfe_enable(line);
745 		if (ret < 0)
746 			dev_err(vfe->camss->dev,
747 				"Failed to enable vfe outputs\n");
748 	} else {
749 		ret = vfe->ops->vfe_disable(line);
750 		if (ret < 0)
751 			dev_err(vfe->camss->dev,
752 				"Failed to disable vfe outputs\n");
753 	}
754 
755 	return ret;
756 }
757 
758 /*
759  * __vfe_get_format - Get pointer to format structure
760  * @line: VFE line
761  * @cfg: V4L2 subdev pad configuration
762  * @pad: pad from which format is requested
763  * @which: TRY or ACTIVE format
764  *
765  * Return pointer to TRY or ACTIVE format structure
766  */
767 static struct v4l2_mbus_framefmt *
768 __vfe_get_format(struct vfe_line *line,
769 		 struct v4l2_subdev_state *sd_state,
770 		 unsigned int pad,
771 		 enum v4l2_subdev_format_whence which)
772 {
773 	if (which == V4L2_SUBDEV_FORMAT_TRY)
774 		return v4l2_subdev_get_try_format(&line->subdev, sd_state,
775 						  pad);
776 
777 	return &line->fmt[pad];
778 }
779 
780 /*
781  * __vfe_get_compose - Get pointer to compose selection structure
782  * @line: VFE line
783  * @cfg: V4L2 subdev pad configuration
784  * @which: TRY or ACTIVE format
785  *
786  * Return pointer to TRY or ACTIVE compose rectangle structure
787  */
788 static struct v4l2_rect *
789 __vfe_get_compose(struct vfe_line *line,
790 		  struct v4l2_subdev_state *sd_state,
791 		  enum v4l2_subdev_format_whence which)
792 {
793 	if (which == V4L2_SUBDEV_FORMAT_TRY)
794 		return v4l2_subdev_get_try_compose(&line->subdev, sd_state,
795 						   MSM_VFE_PAD_SINK);
796 
797 	return &line->compose;
798 }
799 
800 /*
801  * __vfe_get_crop - Get pointer to crop selection structure
802  * @line: VFE line
803  * @cfg: V4L2 subdev pad configuration
804  * @which: TRY or ACTIVE format
805  *
806  * Return pointer to TRY or ACTIVE crop rectangle structure
807  */
808 static struct v4l2_rect *
809 __vfe_get_crop(struct vfe_line *line,
810 	       struct v4l2_subdev_state *sd_state,
811 	       enum v4l2_subdev_format_whence which)
812 {
813 	if (which == V4L2_SUBDEV_FORMAT_TRY)
814 		return v4l2_subdev_get_try_crop(&line->subdev, sd_state,
815 						MSM_VFE_PAD_SRC);
816 
817 	return &line->crop;
818 }
819 
820 /*
821  * vfe_try_format - Handle try format by pad subdev method
822  * @line: VFE line
823  * @cfg: V4L2 subdev pad configuration
824  * @pad: pad on which format is requested
825  * @fmt: pointer to v4l2 format structure
826  * @which: wanted subdev format
827  */
828 static void vfe_try_format(struct vfe_line *line,
829 			   struct v4l2_subdev_state *sd_state,
830 			   unsigned int pad,
831 			   struct v4l2_mbus_framefmt *fmt,
832 			   enum v4l2_subdev_format_whence which)
833 {
834 	unsigned int i;
835 	u32 code;
836 
837 	switch (pad) {
838 	case MSM_VFE_PAD_SINK:
839 		/* Set format on sink pad */
840 
841 		for (i = 0; i < line->nformats; i++)
842 			if (fmt->code == line->formats[i].code)
843 				break;
844 
845 		/* If not found, use UYVY as default */
846 		if (i >= line->nformats)
847 			fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
848 
849 		fmt->width = clamp_t(u32, fmt->width, 1, 8191);
850 		fmt->height = clamp_t(u32, fmt->height, 1, 8191);
851 
852 		fmt->field = V4L2_FIELD_NONE;
853 		fmt->colorspace = V4L2_COLORSPACE_SRGB;
854 
855 		break;
856 
857 	case MSM_VFE_PAD_SRC:
858 		/* Set and return a format same as sink pad */
859 		code = fmt->code;
860 
861 		*fmt = *__vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK,
862 					 which);
863 
864 		fmt->code = vfe_src_pad_code(line, fmt->code, 0, code);
865 
866 		if (line->id == VFE_LINE_PIX) {
867 			struct v4l2_rect *rect;
868 
869 			rect = __vfe_get_crop(line, sd_state, which);
870 
871 			fmt->width = rect->width;
872 			fmt->height = rect->height;
873 		}
874 
875 		break;
876 	}
877 
878 	fmt->colorspace = V4L2_COLORSPACE_SRGB;
879 }
880 
881 /*
882  * vfe_try_compose - Handle try compose selection by pad subdev method
883  * @line: VFE line
884  * @cfg: V4L2 subdev pad configuration
885  * @rect: pointer to v4l2 rect structure
886  * @which: wanted subdev format
887  */
888 static void vfe_try_compose(struct vfe_line *line,
889 			    struct v4l2_subdev_state *sd_state,
890 			    struct v4l2_rect *rect,
891 			    enum v4l2_subdev_format_whence which)
892 {
893 	struct v4l2_mbus_framefmt *fmt;
894 
895 	fmt = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK, which);
896 
897 	if (rect->width > fmt->width)
898 		rect->width = fmt->width;
899 
900 	if (rect->height > fmt->height)
901 		rect->height = fmt->height;
902 
903 	if (fmt->width > rect->width * SCALER_RATIO_MAX)
904 		rect->width = (fmt->width + SCALER_RATIO_MAX - 1) /
905 							SCALER_RATIO_MAX;
906 
907 	rect->width &= ~0x1;
908 
909 	if (fmt->height > rect->height * SCALER_RATIO_MAX)
910 		rect->height = (fmt->height + SCALER_RATIO_MAX - 1) /
911 							SCALER_RATIO_MAX;
912 
913 	if (rect->width < 16)
914 		rect->width = 16;
915 
916 	if (rect->height < 4)
917 		rect->height = 4;
918 }
919 
920 /*
921  * vfe_try_crop - Handle try crop selection by pad subdev method
922  * @line: VFE line
923  * @cfg: V4L2 subdev pad configuration
924  * @rect: pointer to v4l2 rect structure
925  * @which: wanted subdev format
926  */
927 static void vfe_try_crop(struct vfe_line *line,
928 			 struct v4l2_subdev_state *sd_state,
929 			 struct v4l2_rect *rect,
930 			 enum v4l2_subdev_format_whence which)
931 {
932 	struct v4l2_rect *compose;
933 
934 	compose = __vfe_get_compose(line, sd_state, which);
935 
936 	if (rect->width > compose->width)
937 		rect->width = compose->width;
938 
939 	if (rect->width + rect->left > compose->width)
940 		rect->left = compose->width - rect->width;
941 
942 	if (rect->height > compose->height)
943 		rect->height = compose->height;
944 
945 	if (rect->height + rect->top > compose->height)
946 		rect->top = compose->height - rect->height;
947 
948 	/* wm in line based mode writes multiple of 16 horizontally */
949 	rect->left += (rect->width & 0xf) >> 1;
950 	rect->width &= ~0xf;
951 
952 	if (rect->width < 16) {
953 		rect->left = 0;
954 		rect->width = 16;
955 	}
956 
957 	if (rect->height < 4) {
958 		rect->top = 0;
959 		rect->height = 4;
960 	}
961 }
962 
963 /*
964  * vfe_enum_mbus_code - Handle pixel format enumeration
965  * @sd: VFE V4L2 subdevice
966  * @cfg: V4L2 subdev pad configuration
967  * @code: pointer to v4l2_subdev_mbus_code_enum structure
968  *
969  * return -EINVAL or zero on success
970  */
971 static int vfe_enum_mbus_code(struct v4l2_subdev *sd,
972 			      struct v4l2_subdev_state *sd_state,
973 			      struct v4l2_subdev_mbus_code_enum *code)
974 {
975 	struct vfe_line *line = v4l2_get_subdevdata(sd);
976 
977 	if (code->pad == MSM_VFE_PAD_SINK) {
978 		if (code->index >= line->nformats)
979 			return -EINVAL;
980 
981 		code->code = line->formats[code->index].code;
982 	} else {
983 		struct v4l2_mbus_framefmt *sink_fmt;
984 
985 		sink_fmt = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK,
986 					    code->which);
987 
988 		code->code = vfe_src_pad_code(line, sink_fmt->code,
989 					      code->index, 0);
990 		if (!code->code)
991 			return -EINVAL;
992 	}
993 
994 	return 0;
995 }
996 
997 /*
998  * vfe_enum_frame_size - Handle frame size enumeration
999  * @sd: VFE V4L2 subdevice
1000  * @cfg: V4L2 subdev pad configuration
1001  * @fse: pointer to v4l2_subdev_frame_size_enum structure
1002  *
1003  * Return -EINVAL or zero on success
1004  */
1005 static int vfe_enum_frame_size(struct v4l2_subdev *sd,
1006 			       struct v4l2_subdev_state *sd_state,
1007 			       struct v4l2_subdev_frame_size_enum *fse)
1008 {
1009 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1010 	struct v4l2_mbus_framefmt format;
1011 
1012 	if (fse->index != 0)
1013 		return -EINVAL;
1014 
1015 	format.code = fse->code;
1016 	format.width = 1;
1017 	format.height = 1;
1018 	vfe_try_format(line, sd_state, fse->pad, &format, fse->which);
1019 	fse->min_width = format.width;
1020 	fse->min_height = format.height;
1021 
1022 	if (format.code != fse->code)
1023 		return -EINVAL;
1024 
1025 	format.code = fse->code;
1026 	format.width = -1;
1027 	format.height = -1;
1028 	vfe_try_format(line, sd_state, fse->pad, &format, fse->which);
1029 	fse->max_width = format.width;
1030 	fse->max_height = format.height;
1031 
1032 	return 0;
1033 }
1034 
1035 /*
1036  * vfe_get_format - Handle get format by pads subdev method
1037  * @sd: VFE V4L2 subdevice
1038  * @cfg: V4L2 subdev pad configuration
1039  * @fmt: pointer to v4l2 subdev format structure
1040  *
1041  * Return -EINVAL or zero on success
1042  */
1043 static int vfe_get_format(struct v4l2_subdev *sd,
1044 			  struct v4l2_subdev_state *sd_state,
1045 			  struct v4l2_subdev_format *fmt)
1046 {
1047 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1048 	struct v4l2_mbus_framefmt *format;
1049 
1050 	format = __vfe_get_format(line, sd_state, fmt->pad, fmt->which);
1051 	if (format == NULL)
1052 		return -EINVAL;
1053 
1054 	fmt->format = *format;
1055 
1056 	return 0;
1057 }
1058 
1059 static int vfe_set_selection(struct v4l2_subdev *sd,
1060 			     struct v4l2_subdev_state *sd_state,
1061 			     struct v4l2_subdev_selection *sel);
1062 
1063 /*
1064  * vfe_set_format - Handle set format by pads subdev method
1065  * @sd: VFE V4L2 subdevice
1066  * @cfg: V4L2 subdev pad configuration
1067  * @fmt: pointer to v4l2 subdev format structure
1068  *
1069  * Return -EINVAL or zero on success
1070  */
1071 static int vfe_set_format(struct v4l2_subdev *sd,
1072 			  struct v4l2_subdev_state *sd_state,
1073 			  struct v4l2_subdev_format *fmt)
1074 {
1075 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1076 	struct v4l2_mbus_framefmt *format;
1077 
1078 	format = __vfe_get_format(line, sd_state, fmt->pad, fmt->which);
1079 	if (format == NULL)
1080 		return -EINVAL;
1081 
1082 	vfe_try_format(line, sd_state, fmt->pad, &fmt->format, fmt->which);
1083 	*format = fmt->format;
1084 
1085 	if (fmt->pad == MSM_VFE_PAD_SINK) {
1086 		struct v4l2_subdev_selection sel = { 0 };
1087 		int ret;
1088 
1089 		/* Propagate the format from sink to source */
1090 		format = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SRC,
1091 					  fmt->which);
1092 
1093 		*format = fmt->format;
1094 		vfe_try_format(line, sd_state, MSM_VFE_PAD_SRC, format,
1095 			       fmt->which);
1096 
1097 		if (line->id != VFE_LINE_PIX)
1098 			return 0;
1099 
1100 		/* Reset sink pad compose selection */
1101 		sel.which = fmt->which;
1102 		sel.pad = MSM_VFE_PAD_SINK;
1103 		sel.target = V4L2_SEL_TGT_COMPOSE;
1104 		sel.r.width = fmt->format.width;
1105 		sel.r.height = fmt->format.height;
1106 		ret = vfe_set_selection(sd, sd_state, &sel);
1107 		if (ret < 0)
1108 			return ret;
1109 	}
1110 
1111 	return 0;
1112 }
1113 
1114 /*
1115  * vfe_get_selection - Handle get selection by pads subdev method
1116  * @sd: VFE V4L2 subdevice
1117  * @cfg: V4L2 subdev pad configuration
1118  * @sel: pointer to v4l2 subdev selection structure
1119  *
1120  * Return -EINVAL or zero on success
1121  */
1122 static int vfe_get_selection(struct v4l2_subdev *sd,
1123 			     struct v4l2_subdev_state *sd_state,
1124 			     struct v4l2_subdev_selection *sel)
1125 {
1126 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1127 	struct v4l2_subdev_format fmt = { 0 };
1128 	struct v4l2_rect *rect;
1129 	int ret;
1130 
1131 	if (line->id != VFE_LINE_PIX)
1132 		return -EINVAL;
1133 
1134 	if (sel->pad == MSM_VFE_PAD_SINK)
1135 		switch (sel->target) {
1136 		case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1137 			fmt.pad = sel->pad;
1138 			fmt.which = sel->which;
1139 			ret = vfe_get_format(sd, sd_state, &fmt);
1140 			if (ret < 0)
1141 				return ret;
1142 
1143 			sel->r.left = 0;
1144 			sel->r.top = 0;
1145 			sel->r.width = fmt.format.width;
1146 			sel->r.height = fmt.format.height;
1147 			break;
1148 		case V4L2_SEL_TGT_COMPOSE:
1149 			rect = __vfe_get_compose(line, sd_state, sel->which);
1150 			if (rect == NULL)
1151 				return -EINVAL;
1152 
1153 			sel->r = *rect;
1154 			break;
1155 		default:
1156 			return -EINVAL;
1157 		}
1158 	else if (sel->pad == MSM_VFE_PAD_SRC)
1159 		switch (sel->target) {
1160 		case V4L2_SEL_TGT_CROP_BOUNDS:
1161 			rect = __vfe_get_compose(line, sd_state, sel->which);
1162 			if (rect == NULL)
1163 				return -EINVAL;
1164 
1165 			sel->r.left = rect->left;
1166 			sel->r.top = rect->top;
1167 			sel->r.width = rect->width;
1168 			sel->r.height = rect->height;
1169 			break;
1170 		case V4L2_SEL_TGT_CROP:
1171 			rect = __vfe_get_crop(line, sd_state, sel->which);
1172 			if (rect == NULL)
1173 				return -EINVAL;
1174 
1175 			sel->r = *rect;
1176 			break;
1177 		default:
1178 			return -EINVAL;
1179 		}
1180 
1181 	return 0;
1182 }
1183 
1184 /*
1185  * vfe_set_selection - Handle set selection by pads subdev method
1186  * @sd: VFE V4L2 subdevice
1187  * @cfg: V4L2 subdev pad configuration
1188  * @sel: pointer to v4l2 subdev selection structure
1189  *
1190  * Return -EINVAL or zero on success
1191  */
1192 static int vfe_set_selection(struct v4l2_subdev *sd,
1193 			     struct v4l2_subdev_state *sd_state,
1194 			     struct v4l2_subdev_selection *sel)
1195 {
1196 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1197 	struct v4l2_rect *rect;
1198 	int ret;
1199 
1200 	if (line->id != VFE_LINE_PIX)
1201 		return -EINVAL;
1202 
1203 	if (sel->target == V4L2_SEL_TGT_COMPOSE &&
1204 		sel->pad == MSM_VFE_PAD_SINK) {
1205 		struct v4l2_subdev_selection crop = { 0 };
1206 
1207 		rect = __vfe_get_compose(line, sd_state, sel->which);
1208 		if (rect == NULL)
1209 			return -EINVAL;
1210 
1211 		vfe_try_compose(line, sd_state, &sel->r, sel->which);
1212 		*rect = sel->r;
1213 
1214 		/* Reset source crop selection */
1215 		crop.which = sel->which;
1216 		crop.pad = MSM_VFE_PAD_SRC;
1217 		crop.target = V4L2_SEL_TGT_CROP;
1218 		crop.r = *rect;
1219 		ret = vfe_set_selection(sd, sd_state, &crop);
1220 	} else if (sel->target == V4L2_SEL_TGT_CROP &&
1221 		sel->pad == MSM_VFE_PAD_SRC) {
1222 		struct v4l2_subdev_format fmt = { 0 };
1223 
1224 		rect = __vfe_get_crop(line, sd_state, sel->which);
1225 		if (rect == NULL)
1226 			return -EINVAL;
1227 
1228 		vfe_try_crop(line, sd_state, &sel->r, sel->which);
1229 		*rect = sel->r;
1230 
1231 		/* Reset source pad format width and height */
1232 		fmt.which = sel->which;
1233 		fmt.pad = MSM_VFE_PAD_SRC;
1234 		ret = vfe_get_format(sd, sd_state, &fmt);
1235 		if (ret < 0)
1236 			return ret;
1237 
1238 		fmt.format.width = rect->width;
1239 		fmt.format.height = rect->height;
1240 		ret = vfe_set_format(sd, sd_state, &fmt);
1241 	} else {
1242 		ret = -EINVAL;
1243 	}
1244 
1245 	return ret;
1246 }
1247 
1248 /*
1249  * vfe_init_formats - Initialize formats on all pads
1250  * @sd: VFE V4L2 subdevice
1251  * @fh: V4L2 subdev file handle
1252  *
1253  * Initialize all pad formats with default values.
1254  *
1255  * Return 0 on success or a negative error code otherwise
1256  */
1257 static int vfe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1258 {
1259 	struct v4l2_subdev_format format = {
1260 		.pad = MSM_VFE_PAD_SINK,
1261 		.which = fh ? V4L2_SUBDEV_FORMAT_TRY :
1262 			      V4L2_SUBDEV_FORMAT_ACTIVE,
1263 		.format = {
1264 			.code = MEDIA_BUS_FMT_UYVY8_2X8,
1265 			.width = 1920,
1266 			.height = 1080
1267 		}
1268 	};
1269 
1270 	return vfe_set_format(sd, fh ? fh->state : NULL, &format);
1271 }
1272 
1273 /*
1274  * msm_vfe_subdev_init - Initialize VFE device structure and resources
1275  * @vfe: VFE device
1276  * @res: VFE module resources table
1277  *
1278  * Return 0 on success or a negative error code otherwise
1279  */
1280 int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
1281 			const struct resources *res, u8 id)
1282 {
1283 	struct device *dev = camss->dev;
1284 	struct platform_device *pdev = to_platform_device(dev);
1285 	int i, j;
1286 	int ret;
1287 
1288 	switch (camss->version) {
1289 	case CAMSS_8x16:
1290 		vfe->ops = &vfe_ops_4_1;
1291 		break;
1292 	case CAMSS_8x96:
1293 		vfe->ops = &vfe_ops_4_7;
1294 		break;
1295 	case CAMSS_660:
1296 		vfe->ops = &vfe_ops_4_8;
1297 		break;
1298 	case CAMSS_845:
1299 		vfe->ops = &vfe_ops_170;
1300 		break;
1301 	case CAMSS_8250:
1302 		vfe->ops = &vfe_ops_480;
1303 		break;
1304 	default:
1305 		return -EINVAL;
1306 	}
1307 	vfe->ops->subdev_init(dev, vfe);
1308 
1309 	/* Memory */
1310 
1311 	vfe->base = devm_platform_ioremap_resource_byname(pdev, res->reg[0]);
1312 	if (IS_ERR(vfe->base)) {
1313 		dev_err(dev, "could not map memory\n");
1314 		return PTR_ERR(vfe->base);
1315 	}
1316 
1317 	/* Interrupt */
1318 
1319 	ret = platform_get_irq_byname(pdev, res->interrupt[0]);
1320 	if (ret < 0)
1321 		return ret;
1322 
1323 	vfe->irq = ret;
1324 	snprintf(vfe->irq_name, sizeof(vfe->irq_name), "%s_%s%d",
1325 		 dev_name(dev), MSM_VFE_NAME, id);
1326 	ret = devm_request_irq(dev, vfe->irq, vfe->ops->isr,
1327 			       IRQF_TRIGGER_RISING, vfe->irq_name, vfe);
1328 	if (ret < 0) {
1329 		dev_err(dev, "request_irq failed: %d\n", ret);
1330 		return ret;
1331 	}
1332 
1333 	/* Clocks */
1334 
1335 	vfe->nclocks = 0;
1336 	while (res->clock[vfe->nclocks])
1337 		vfe->nclocks++;
1338 
1339 	vfe->clock = devm_kcalloc(dev, vfe->nclocks, sizeof(*vfe->clock),
1340 				  GFP_KERNEL);
1341 	if (!vfe->clock)
1342 		return -ENOMEM;
1343 
1344 	for (i = 0; i < vfe->nclocks; i++) {
1345 		struct camss_clock *clock = &vfe->clock[i];
1346 
1347 		clock->clk = devm_clk_get(dev, res->clock[i]);
1348 		if (IS_ERR(clock->clk))
1349 			return PTR_ERR(clock->clk);
1350 
1351 		clock->name = res->clock[i];
1352 
1353 		clock->nfreqs = 0;
1354 		while (res->clock_rate[i][clock->nfreqs])
1355 			clock->nfreqs++;
1356 
1357 		if (!clock->nfreqs) {
1358 			clock->freq = NULL;
1359 			continue;
1360 		}
1361 
1362 		clock->freq = devm_kcalloc(dev,
1363 					   clock->nfreqs,
1364 					   sizeof(*clock->freq),
1365 					   GFP_KERNEL);
1366 		if (!clock->freq)
1367 			return -ENOMEM;
1368 
1369 		for (j = 0; j < clock->nfreqs; j++)
1370 			clock->freq[j] = res->clock_rate[i][j];
1371 	}
1372 
1373 	mutex_init(&vfe->power_lock);
1374 	vfe->power_count = 0;
1375 
1376 	mutex_init(&vfe->stream_lock);
1377 	vfe->stream_count = 0;
1378 
1379 	spin_lock_init(&vfe->output_lock);
1380 
1381 	vfe->camss = camss;
1382 	vfe->id = id;
1383 	vfe->reg_update = 0;
1384 
1385 	for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
1386 		struct vfe_line *l = &vfe->line[i];
1387 
1388 		l->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1389 		l->video_out.camss = camss;
1390 		l->id = i;
1391 		init_completion(&l->output.sof);
1392 		init_completion(&l->output.reg_update);
1393 
1394 		if (camss->version == CAMSS_8x16) {
1395 			if (i == VFE_LINE_PIX) {
1396 				l->formats = formats_pix_8x16;
1397 				l->nformats = ARRAY_SIZE(formats_pix_8x16);
1398 			} else {
1399 				l->formats = formats_rdi_8x16;
1400 				l->nformats = ARRAY_SIZE(formats_rdi_8x16);
1401 			}
1402 		} else if (camss->version == CAMSS_8x96 ||
1403 			   camss->version == CAMSS_660) {
1404 			if (i == VFE_LINE_PIX) {
1405 				l->formats = formats_pix_8x96;
1406 				l->nformats = ARRAY_SIZE(formats_pix_8x96);
1407 			} else {
1408 				l->formats = formats_rdi_8x96;
1409 				l->nformats = ARRAY_SIZE(formats_rdi_8x96);
1410 			}
1411 		} else if (camss->version == CAMSS_845 ||
1412 			   camss->version == CAMSS_8250) {
1413 			l->formats = formats_rdi_845;
1414 			l->nformats = ARRAY_SIZE(formats_rdi_845);
1415 		} else {
1416 			return -EINVAL;
1417 		}
1418 	}
1419 
1420 	init_completion(&vfe->reset_complete);
1421 	init_completion(&vfe->halt_complete);
1422 
1423 	return 0;
1424 }
1425 
1426 /*
1427  * vfe_link_setup - Setup VFE connections
1428  * @entity: Pointer to media entity structure
1429  * @local: Pointer to local pad
1430  * @remote: Pointer to remote pad
1431  * @flags: Link flags
1432  *
1433  * Return 0 on success
1434  */
1435 static int vfe_link_setup(struct media_entity *entity,
1436 			  const struct media_pad *local,
1437 			  const struct media_pad *remote, u32 flags)
1438 {
1439 	if (flags & MEDIA_LNK_FL_ENABLED)
1440 		if (media_pad_remote_pad_first(local))
1441 			return -EBUSY;
1442 
1443 	return 0;
1444 }
1445 
1446 static const struct v4l2_subdev_core_ops vfe_core_ops = {
1447 	.s_power = vfe_set_power,
1448 };
1449 
1450 static const struct v4l2_subdev_video_ops vfe_video_ops = {
1451 	.s_stream = vfe_set_stream,
1452 };
1453 
1454 static const struct v4l2_subdev_pad_ops vfe_pad_ops = {
1455 	.enum_mbus_code = vfe_enum_mbus_code,
1456 	.enum_frame_size = vfe_enum_frame_size,
1457 	.get_fmt = vfe_get_format,
1458 	.set_fmt = vfe_set_format,
1459 	.get_selection = vfe_get_selection,
1460 	.set_selection = vfe_set_selection,
1461 };
1462 
1463 static const struct v4l2_subdev_ops vfe_v4l2_ops = {
1464 	.core = &vfe_core_ops,
1465 	.video = &vfe_video_ops,
1466 	.pad = &vfe_pad_ops,
1467 };
1468 
1469 static const struct v4l2_subdev_internal_ops vfe_v4l2_internal_ops = {
1470 	.open = vfe_init_formats,
1471 };
1472 
1473 static const struct media_entity_operations vfe_media_ops = {
1474 	.link_setup = vfe_link_setup,
1475 	.link_validate = v4l2_subdev_link_validate,
1476 };
1477 
1478 /*
1479  * msm_vfe_register_entities - Register subdev node for VFE module
1480  * @vfe: VFE device
1481  * @v4l2_dev: V4L2 device
1482  *
1483  * Initialize and register a subdev node for the VFE module. Then
1484  * call msm_video_register() to register the video device node which
1485  * will be connected to this subdev node. Then actually create the
1486  * media link between them.
1487  *
1488  * Return 0 on success or a negative error code otherwise
1489  */
1490 int msm_vfe_register_entities(struct vfe_device *vfe,
1491 			      struct v4l2_device *v4l2_dev)
1492 {
1493 	struct device *dev = vfe->camss->dev;
1494 	struct v4l2_subdev *sd;
1495 	struct media_pad *pads;
1496 	struct camss_video *video_out;
1497 	int ret;
1498 	int i;
1499 
1500 	for (i = 0; i < vfe->line_num; i++) {
1501 		char name[32];
1502 
1503 		sd = &vfe->line[i].subdev;
1504 		pads = vfe->line[i].pads;
1505 		video_out = &vfe->line[i].video_out;
1506 
1507 		v4l2_subdev_init(sd, &vfe_v4l2_ops);
1508 		sd->internal_ops = &vfe_v4l2_internal_ops;
1509 		sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1510 		if (i == VFE_LINE_PIX)
1511 			snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s",
1512 				 MSM_VFE_NAME, vfe->id, "pix");
1513 		else
1514 			snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s%d",
1515 				 MSM_VFE_NAME, vfe->id, "rdi", i);
1516 
1517 		v4l2_set_subdevdata(sd, &vfe->line[i]);
1518 
1519 		ret = vfe_init_formats(sd, NULL);
1520 		if (ret < 0) {
1521 			dev_err(dev, "Failed to init format: %d\n", ret);
1522 			goto error_init;
1523 		}
1524 
1525 		pads[MSM_VFE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1526 		pads[MSM_VFE_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
1527 
1528 		sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1529 		sd->entity.ops = &vfe_media_ops;
1530 		ret = media_entity_pads_init(&sd->entity, MSM_VFE_PADS_NUM,
1531 					     pads);
1532 		if (ret < 0) {
1533 			dev_err(dev, "Failed to init media entity: %d\n", ret);
1534 			goto error_init;
1535 		}
1536 
1537 		ret = v4l2_device_register_subdev(v4l2_dev, sd);
1538 		if (ret < 0) {
1539 			dev_err(dev, "Failed to register subdev: %d\n", ret);
1540 			goto error_reg_subdev;
1541 		}
1542 
1543 		video_out->ops = &vfe->video_ops;
1544 		video_out->bpl_alignment = 8;
1545 		video_out->line_based = 0;
1546 		if (i == VFE_LINE_PIX) {
1547 			video_out->bpl_alignment = 16;
1548 			video_out->line_based = 1;
1549 		}
1550 		snprintf(name, ARRAY_SIZE(name), "%s%d_%s%d",
1551 			 MSM_VFE_NAME, vfe->id, "video", i);
1552 		ret = msm_video_register(video_out, v4l2_dev, name,
1553 					 i == VFE_LINE_PIX ? 1 : 0);
1554 		if (ret < 0) {
1555 			dev_err(dev, "Failed to register video node: %d\n",
1556 				ret);
1557 			goto error_reg_video;
1558 		}
1559 
1560 		ret = media_create_pad_link(
1561 				&sd->entity, MSM_VFE_PAD_SRC,
1562 				&video_out->vdev.entity, 0,
1563 				MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
1564 		if (ret < 0) {
1565 			dev_err(dev, "Failed to link %s->%s entities: %d\n",
1566 				sd->entity.name, video_out->vdev.entity.name,
1567 				ret);
1568 			goto error_link;
1569 		}
1570 	}
1571 
1572 	return 0;
1573 
1574 error_link:
1575 	msm_video_unregister(video_out);
1576 
1577 error_reg_video:
1578 	v4l2_device_unregister_subdev(sd);
1579 
1580 error_reg_subdev:
1581 	media_entity_cleanup(&sd->entity);
1582 
1583 error_init:
1584 	for (i--; i >= 0; i--) {
1585 		sd = &vfe->line[i].subdev;
1586 		video_out = &vfe->line[i].video_out;
1587 
1588 		msm_video_unregister(video_out);
1589 		v4l2_device_unregister_subdev(sd);
1590 		media_entity_cleanup(&sd->entity);
1591 	}
1592 
1593 	return ret;
1594 }
1595 
1596 /*
1597  * msm_vfe_unregister_entities - Unregister VFE module subdev node
1598  * @vfe: VFE device
1599  */
1600 void msm_vfe_unregister_entities(struct vfe_device *vfe)
1601 {
1602 	int i;
1603 
1604 	mutex_destroy(&vfe->power_lock);
1605 	mutex_destroy(&vfe->stream_lock);
1606 
1607 	for (i = 0; i < vfe->line_num; i++) {
1608 		struct v4l2_subdev *sd = &vfe->line[i].subdev;
1609 		struct camss_video *video_out = &vfe->line[i].video_out;
1610 
1611 		msm_video_unregister(video_out);
1612 		v4l2_device_unregister_subdev(sd);
1613 		media_entity_cleanup(&sd->entity);
1614 	}
1615 }
1616