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_Y10_1X10, 10 },
122 	{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, 16 },
123 };
124 
125 /*
126  * vfe_get_bpp - map media bus format to bits per pixel
127  * @formats: supported media bus formats array
128  * @nformats: size of @formats array
129  * @code: media bus format code
130  *
131  * Return number of bits per pixel
132  */
133 static u8 vfe_get_bpp(const struct vfe_format *formats,
134 		      unsigned int nformats, u32 code)
135 {
136 	unsigned int i;
137 
138 	for (i = 0; i < nformats; i++)
139 		if (code == formats[i].code)
140 			return formats[i].bpp;
141 
142 	WARN(1, "Unknown format\n");
143 
144 	return formats[0].bpp;
145 }
146 
147 static u32 vfe_find_code(u32 *code, unsigned int n_code,
148 			 unsigned int index, u32 req_code)
149 {
150 	int i;
151 
152 	if (!req_code && (index >= n_code))
153 		return 0;
154 
155 	for (i = 0; i < n_code; i++)
156 		if (req_code) {
157 			if (req_code == code[i])
158 				return req_code;
159 		} else {
160 			if (i == index)
161 				return code[i];
162 		}
163 
164 	return code[0];
165 }
166 
167 static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
168 			    unsigned int index, u32 src_req_code)
169 {
170 	struct vfe_device *vfe = to_vfe(line);
171 
172 	if (vfe->camss->version == CAMSS_8x16)
173 		switch (sink_code) {
174 		case MEDIA_BUS_FMT_YUYV8_2X8:
175 		{
176 			u32 src_code[] = {
177 				MEDIA_BUS_FMT_YUYV8_2X8,
178 				MEDIA_BUS_FMT_YUYV8_1_5X8,
179 			};
180 
181 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
182 					     index, src_req_code);
183 		}
184 		case MEDIA_BUS_FMT_YVYU8_2X8:
185 		{
186 			u32 src_code[] = {
187 				MEDIA_BUS_FMT_YVYU8_2X8,
188 				MEDIA_BUS_FMT_YVYU8_1_5X8,
189 			};
190 
191 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
192 					     index, src_req_code);
193 		}
194 		case MEDIA_BUS_FMT_UYVY8_2X8:
195 		{
196 			u32 src_code[] = {
197 				MEDIA_BUS_FMT_UYVY8_2X8,
198 				MEDIA_BUS_FMT_UYVY8_1_5X8,
199 			};
200 
201 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
202 					     index, src_req_code);
203 		}
204 		case MEDIA_BUS_FMT_VYUY8_2X8:
205 		{
206 			u32 src_code[] = {
207 				MEDIA_BUS_FMT_VYUY8_2X8,
208 				MEDIA_BUS_FMT_VYUY8_1_5X8,
209 			};
210 
211 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
212 					     index, src_req_code);
213 		}
214 		default:
215 			if (index > 0)
216 				return 0;
217 
218 			return sink_code;
219 		}
220 	else if (vfe->camss->version == CAMSS_8x96 ||
221 		 vfe->camss->version == CAMSS_660 ||
222 		 vfe->camss->version == CAMSS_845)
223 		switch (sink_code) {
224 		case MEDIA_BUS_FMT_YUYV8_2X8:
225 		{
226 			u32 src_code[] = {
227 				MEDIA_BUS_FMT_YUYV8_2X8,
228 				MEDIA_BUS_FMT_YVYU8_2X8,
229 				MEDIA_BUS_FMT_UYVY8_2X8,
230 				MEDIA_BUS_FMT_VYUY8_2X8,
231 				MEDIA_BUS_FMT_YUYV8_1_5X8,
232 			};
233 
234 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
235 					     index, src_req_code);
236 		}
237 		case MEDIA_BUS_FMT_YVYU8_2X8:
238 		{
239 			u32 src_code[] = {
240 				MEDIA_BUS_FMT_YVYU8_2X8,
241 				MEDIA_BUS_FMT_YUYV8_2X8,
242 				MEDIA_BUS_FMT_UYVY8_2X8,
243 				MEDIA_BUS_FMT_VYUY8_2X8,
244 				MEDIA_BUS_FMT_YVYU8_1_5X8,
245 			};
246 
247 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
248 					     index, src_req_code);
249 		}
250 		case MEDIA_BUS_FMT_UYVY8_2X8:
251 		{
252 			u32 src_code[] = {
253 				MEDIA_BUS_FMT_UYVY8_2X8,
254 				MEDIA_BUS_FMT_YUYV8_2X8,
255 				MEDIA_BUS_FMT_YVYU8_2X8,
256 				MEDIA_BUS_FMT_VYUY8_2X8,
257 				MEDIA_BUS_FMT_UYVY8_1_5X8,
258 			};
259 
260 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
261 					     index, src_req_code);
262 		}
263 		case MEDIA_BUS_FMT_VYUY8_2X8:
264 		{
265 			u32 src_code[] = {
266 				MEDIA_BUS_FMT_VYUY8_2X8,
267 				MEDIA_BUS_FMT_YUYV8_2X8,
268 				MEDIA_BUS_FMT_YVYU8_2X8,
269 				MEDIA_BUS_FMT_UYVY8_2X8,
270 				MEDIA_BUS_FMT_VYUY8_1_5X8,
271 			};
272 
273 			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
274 					     index, src_req_code);
275 		}
276 		default:
277 			if (index > 0)
278 				return 0;
279 
280 			return sink_code;
281 		}
282 	else
283 		return 0;
284 }
285 
286 int vfe_reset(struct vfe_device *vfe)
287 {
288 	unsigned long time;
289 
290 	reinit_completion(&vfe->reset_complete);
291 
292 	vfe->ops->global_reset(vfe);
293 
294 	time = wait_for_completion_timeout(&vfe->reset_complete,
295 		msecs_to_jiffies(VFE_RESET_TIMEOUT_MS));
296 	if (!time) {
297 		dev_err(vfe->camss->dev, "VFE reset timeout\n");
298 		return -EIO;
299 	}
300 
301 	return 0;
302 }
303 
304 static void vfe_init_outputs(struct vfe_device *vfe)
305 {
306 	int i;
307 
308 	for (i = 0; i < vfe->line_num; i++) {
309 		struct vfe_output *output = &vfe->line[i].output;
310 
311 		output->state = VFE_OUTPUT_OFF;
312 		output->buf[0] = NULL;
313 		output->buf[1] = NULL;
314 		INIT_LIST_HEAD(&output->pending_bufs);
315 	}
316 }
317 
318 static void vfe_reset_output_maps(struct vfe_device *vfe)
319 {
320 	int i;
321 
322 	for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++)
323 		vfe->wm_output_map[i] = VFE_LINE_NONE;
324 }
325 
326 int vfe_reserve_wm(struct vfe_device *vfe, enum vfe_line_id line_id)
327 {
328 	int ret = -EBUSY;
329 	int i;
330 
331 	for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++) {
332 		if (vfe->wm_output_map[i] == VFE_LINE_NONE) {
333 			vfe->wm_output_map[i] = line_id;
334 			ret = i;
335 			break;
336 		}
337 	}
338 
339 	return ret;
340 }
341 
342 int vfe_release_wm(struct vfe_device *vfe, u8 wm)
343 {
344 	if (wm >= ARRAY_SIZE(vfe->wm_output_map))
345 		return -EINVAL;
346 
347 	vfe->wm_output_map[wm] = VFE_LINE_NONE;
348 
349 	return 0;
350 }
351 
352 struct camss_buffer *vfe_buf_get_pending(struct vfe_output *output)
353 {
354 	struct camss_buffer *buffer = NULL;
355 
356 	if (!list_empty(&output->pending_bufs)) {
357 		buffer = list_first_entry(&output->pending_bufs,
358 					  struct camss_buffer,
359 					  queue);
360 		list_del(&buffer->queue);
361 	}
362 
363 	return buffer;
364 }
365 
366 void vfe_buf_add_pending(struct vfe_output *output,
367 			 struct camss_buffer *buffer)
368 {
369 	INIT_LIST_HEAD(&buffer->queue);
370 	list_add_tail(&buffer->queue, &output->pending_bufs);
371 }
372 
373 /*
374  * vfe_buf_flush_pending - Flush all pending buffers.
375  * @output: VFE output
376  * @state: vb2 buffer state
377  */
378 static void vfe_buf_flush_pending(struct vfe_output *output,
379 				  enum vb2_buffer_state state)
380 {
381 	struct camss_buffer *buf;
382 	struct camss_buffer *t;
383 
384 	list_for_each_entry_safe(buf, t, &output->pending_bufs, queue) {
385 		vb2_buffer_done(&buf->vb.vb2_buf, state);
386 		list_del(&buf->queue);
387 	}
388 }
389 
390 int vfe_put_output(struct vfe_line *line)
391 {
392 	struct vfe_device *vfe = to_vfe(line);
393 	struct vfe_output *output = &line->output;
394 	unsigned long flags;
395 	unsigned int i;
396 
397 	spin_lock_irqsave(&vfe->output_lock, flags);
398 
399 	for (i = 0; i < output->wm_num; i++)
400 		vfe_release_wm(vfe, output->wm_idx[i]);
401 
402 	output->state = VFE_OUTPUT_OFF;
403 
404 	spin_unlock_irqrestore(&vfe->output_lock, flags);
405 	return 0;
406 }
407 
408 /**
409  * vfe_isr_comp_done() - Process composite image done interrupt
410  * @vfe: VFE Device
411  * @comp: Composite image id
412  */
413 void vfe_isr_comp_done(struct vfe_device *vfe, u8 comp)
414 {
415 	unsigned int i;
416 
417 	for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++)
418 		if (vfe->wm_output_map[i] == VFE_LINE_PIX) {
419 			vfe->isr_ops.wm_done(vfe, i);
420 			break;
421 		}
422 }
423 
424 void vfe_isr_reset_ack(struct vfe_device *vfe)
425 {
426 	complete(&vfe->reset_complete);
427 }
428 
429 /*
430  * vfe_set_clock_rates - Calculate and set clock rates on VFE module
431  * @vfe: VFE device
432  *
433  * Return 0 on success or a negative error code otherwise
434  */
435 static int vfe_set_clock_rates(struct vfe_device *vfe)
436 {
437 	struct device *dev = vfe->camss->dev;
438 	u64 pixel_clock[VFE_LINE_NUM_MAX];
439 	int i, j;
440 	int ret;
441 
442 	for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
443 		ret = camss_get_pixel_clock(&vfe->line[i].subdev.entity,
444 					    &pixel_clock[i]);
445 		if (ret)
446 			pixel_clock[i] = 0;
447 	}
448 
449 	for (i = 0; i < vfe->nclocks; i++) {
450 		struct camss_clock *clock = &vfe->clock[i];
451 
452 		if (!strcmp(clock->name, "vfe0") ||
453 		    !strcmp(clock->name, "vfe1") ||
454 		    !strcmp(clock->name, "vfe_lite")) {
455 			u64 min_rate = 0;
456 			long rate;
457 
458 			for (j = VFE_LINE_RDI0; j < vfe->line_num; j++) {
459 				u32 tmp;
460 				u8 bpp;
461 
462 				if (j == VFE_LINE_PIX) {
463 					tmp = pixel_clock[j];
464 				} else {
465 					struct vfe_line *l = &vfe->line[j];
466 
467 					bpp = vfe_get_bpp(l->formats,
468 						l->nformats,
469 						l->fmt[MSM_VFE_PAD_SINK].code);
470 					tmp = pixel_clock[j] * bpp / 64;
471 				}
472 
473 				if (min_rate < tmp)
474 					min_rate = tmp;
475 			}
476 
477 			camss_add_clock_margin(&min_rate);
478 
479 			for (j = 0; j < clock->nfreqs; j++)
480 				if (min_rate < clock->freq[j])
481 					break;
482 
483 			if (j == clock->nfreqs) {
484 				dev_err(dev,
485 					"Pixel clock is too high for VFE");
486 				return -EINVAL;
487 			}
488 
489 			/* if sensor pixel clock is not available */
490 			/* set highest possible VFE clock rate */
491 			if (min_rate == 0)
492 				j = clock->nfreqs - 1;
493 
494 			rate = clk_round_rate(clock->clk, clock->freq[j]);
495 			if (rate < 0) {
496 				dev_err(dev, "clk round rate failed: %ld\n",
497 					rate);
498 				return -EINVAL;
499 			}
500 
501 			ret = clk_set_rate(clock->clk, rate);
502 			if (ret < 0) {
503 				dev_err(dev, "clk set rate failed: %d\n", ret);
504 				return ret;
505 			}
506 		}
507 	}
508 
509 	return 0;
510 }
511 
512 /*
513  * vfe_check_clock_rates - Check current clock rates on VFE module
514  * @vfe: VFE device
515  *
516  * Return 0 if current clock rates are suitable for a new pipeline
517  * or a negative error code otherwise
518  */
519 static int vfe_check_clock_rates(struct vfe_device *vfe)
520 {
521 	u64 pixel_clock[VFE_LINE_NUM_MAX];
522 	int i, j;
523 	int ret;
524 
525 	for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
526 		ret = camss_get_pixel_clock(&vfe->line[i].subdev.entity,
527 					    &pixel_clock[i]);
528 		if (ret)
529 			pixel_clock[i] = 0;
530 	}
531 
532 	for (i = 0; i < vfe->nclocks; i++) {
533 		struct camss_clock *clock = &vfe->clock[i];
534 
535 		if (!strcmp(clock->name, "vfe0") ||
536 		    !strcmp(clock->name, "vfe1")) {
537 			u64 min_rate = 0;
538 			unsigned long rate;
539 
540 			for (j = VFE_LINE_RDI0; j < vfe->line_num; j++) {
541 				u32 tmp;
542 				u8 bpp;
543 
544 				if (j == VFE_LINE_PIX) {
545 					tmp = pixel_clock[j];
546 				} else {
547 					struct vfe_line *l = &vfe->line[j];
548 
549 					bpp = vfe_get_bpp(l->formats,
550 						l->nformats,
551 						l->fmt[MSM_VFE_PAD_SINK].code);
552 					tmp = pixel_clock[j] * bpp / 64;
553 				}
554 
555 				if (min_rate < tmp)
556 					min_rate = tmp;
557 			}
558 
559 			camss_add_clock_margin(&min_rate);
560 
561 			rate = clk_get_rate(clock->clk);
562 			if (rate < min_rate)
563 				return -EBUSY;
564 		}
565 	}
566 
567 	return 0;
568 }
569 
570 /*
571  * vfe_get - Power up and reset VFE module
572  * @vfe: VFE Device
573  *
574  * Return 0 on success or a negative error code otherwise
575  */
576 static int vfe_get(struct vfe_device *vfe)
577 {
578 	int ret;
579 
580 	mutex_lock(&vfe->power_lock);
581 
582 	if (vfe->power_count == 0) {
583 		ret = vfe->ops->pm_domain_on(vfe);
584 		if (ret < 0)
585 			goto error_pm_domain;
586 
587 		ret = pm_runtime_get_sync(vfe->camss->dev);
588 		if (ret < 0)
589 			goto error_pm_runtime_get;
590 
591 		ret = vfe_set_clock_rates(vfe);
592 		if (ret < 0)
593 			goto error_pm_runtime_get;
594 
595 		ret = camss_enable_clocks(vfe->nclocks, vfe->clock,
596 					  vfe->camss->dev);
597 		if (ret < 0)
598 			goto error_pm_runtime_get;
599 
600 		ret = vfe_reset(vfe);
601 		if (ret < 0)
602 			goto error_reset;
603 
604 		vfe_reset_output_maps(vfe);
605 
606 		vfe_init_outputs(vfe);
607 	} else {
608 		ret = vfe_check_clock_rates(vfe);
609 		if (ret < 0)
610 			goto error_pm_runtime_get;
611 	}
612 	vfe->power_count++;
613 
614 	mutex_unlock(&vfe->power_lock);
615 
616 	return 0;
617 
618 error_reset:
619 	camss_disable_clocks(vfe->nclocks, vfe->clock);
620 
621 error_pm_runtime_get:
622 	pm_runtime_put_sync(vfe->camss->dev);
623 	vfe->ops->pm_domain_off(vfe);
624 
625 error_pm_domain:
626 	mutex_unlock(&vfe->power_lock);
627 
628 	return ret;
629 }
630 
631 /*
632  * vfe_put - Power down VFE module
633  * @vfe: VFE Device
634  */
635 static void vfe_put(struct vfe_device *vfe)
636 {
637 	mutex_lock(&vfe->power_lock);
638 
639 	if (vfe->power_count == 0) {
640 		dev_err(vfe->camss->dev, "vfe power off on power_count == 0\n");
641 		goto exit;
642 	} else if (vfe->power_count == 1) {
643 		if (vfe->was_streaming) {
644 			vfe->was_streaming = 0;
645 			vfe->ops->vfe_halt(vfe);
646 		}
647 		camss_disable_clocks(vfe->nclocks, vfe->clock);
648 		pm_runtime_put_sync(vfe->camss->dev);
649 		vfe->ops->pm_domain_off(vfe);
650 	}
651 
652 	vfe->power_count--;
653 
654 exit:
655 	mutex_unlock(&vfe->power_lock);
656 }
657 
658 /*
659  * vfe_flush_buffers - Return all vb2 buffers
660  * @vid: Video device structure
661  * @state: vb2 buffer state of the returned buffers
662  *
663  * Return all buffers to vb2. This includes queued pending buffers (still
664  * unused) and any buffers given to the hardware but again still not used.
665  *
666  * Return 0 on success or a negative error code otherwise
667  */
668 int vfe_flush_buffers(struct camss_video *vid,
669 		      enum vb2_buffer_state state)
670 {
671 	struct vfe_line *line = container_of(vid, struct vfe_line, video_out);
672 	struct vfe_device *vfe = to_vfe(line);
673 	struct vfe_output *output;
674 	unsigned long flags;
675 
676 	output = &line->output;
677 
678 	spin_lock_irqsave(&vfe->output_lock, flags);
679 
680 	vfe_buf_flush_pending(output, state);
681 
682 	if (output->buf[0])
683 		vb2_buffer_done(&output->buf[0]->vb.vb2_buf, state);
684 
685 	if (output->buf[1])
686 		vb2_buffer_done(&output->buf[1]->vb.vb2_buf, state);
687 
688 	if (output->last_buffer) {
689 		vb2_buffer_done(&output->last_buffer->vb.vb2_buf, state);
690 		output->last_buffer = NULL;
691 	}
692 
693 	spin_unlock_irqrestore(&vfe->output_lock, flags);
694 
695 	return 0;
696 }
697 
698 /*
699  * vfe_set_power - Power on/off VFE module
700  * @sd: VFE V4L2 subdevice
701  * @on: Requested power state
702  *
703  * Return 0 on success or a negative error code otherwise
704  */
705 static int vfe_set_power(struct v4l2_subdev *sd, int on)
706 {
707 	struct vfe_line *line = v4l2_get_subdevdata(sd);
708 	struct vfe_device *vfe = to_vfe(line);
709 	int ret;
710 
711 	if (on) {
712 		ret = vfe_get(vfe);
713 		if (ret < 0)
714 			return ret;
715 
716 		vfe->ops->hw_version_read(vfe, vfe->camss->dev);
717 	} else {
718 		vfe_put(vfe);
719 	}
720 
721 	return 0;
722 }
723 
724 /*
725  * vfe_set_stream - Enable/disable streaming on VFE module
726  * @sd: VFE V4L2 subdevice
727  * @enable: Requested streaming state
728  *
729  * Main configuration of VFE module is triggered here.
730  *
731  * Return 0 on success or a negative error code otherwise
732  */
733 static int vfe_set_stream(struct v4l2_subdev *sd, int enable)
734 {
735 	struct vfe_line *line = v4l2_get_subdevdata(sd);
736 	struct vfe_device *vfe = to_vfe(line);
737 	int ret;
738 
739 	if (enable) {
740 		ret = vfe->ops->vfe_enable(line);
741 		if (ret < 0)
742 			dev_err(vfe->camss->dev,
743 				"Failed to enable vfe outputs\n");
744 	} else {
745 		ret = vfe->ops->vfe_disable(line);
746 		if (ret < 0)
747 			dev_err(vfe->camss->dev,
748 				"Failed to disable vfe outputs\n");
749 	}
750 
751 	return ret;
752 }
753 
754 /*
755  * __vfe_get_format - Get pointer to format structure
756  * @line: VFE line
757  * @cfg: V4L2 subdev pad configuration
758  * @pad: pad from which format is requested
759  * @which: TRY or ACTIVE format
760  *
761  * Return pointer to TRY or ACTIVE format structure
762  */
763 static struct v4l2_mbus_framefmt *
764 __vfe_get_format(struct vfe_line *line,
765 		 struct v4l2_subdev_pad_config *cfg,
766 		 unsigned int pad,
767 		 enum v4l2_subdev_format_whence which)
768 {
769 	if (which == V4L2_SUBDEV_FORMAT_TRY)
770 		return v4l2_subdev_get_try_format(&line->subdev, cfg, pad);
771 
772 	return &line->fmt[pad];
773 }
774 
775 /*
776  * __vfe_get_compose - Get pointer to compose selection structure
777  * @line: VFE line
778  * @cfg: V4L2 subdev pad configuration
779  * @which: TRY or ACTIVE format
780  *
781  * Return pointer to TRY or ACTIVE compose rectangle structure
782  */
783 static struct v4l2_rect *
784 __vfe_get_compose(struct vfe_line *line,
785 		  struct v4l2_subdev_pad_config *cfg,
786 		  enum v4l2_subdev_format_whence which)
787 {
788 	if (which == V4L2_SUBDEV_FORMAT_TRY)
789 		return v4l2_subdev_get_try_compose(&line->subdev, cfg,
790 						   MSM_VFE_PAD_SINK);
791 
792 	return &line->compose;
793 }
794 
795 /*
796  * __vfe_get_crop - Get pointer to crop selection structure
797  * @line: VFE line
798  * @cfg: V4L2 subdev pad configuration
799  * @which: TRY or ACTIVE format
800  *
801  * Return pointer to TRY or ACTIVE crop rectangle structure
802  */
803 static struct v4l2_rect *
804 __vfe_get_crop(struct vfe_line *line,
805 	       struct v4l2_subdev_pad_config *cfg,
806 	       enum v4l2_subdev_format_whence which)
807 {
808 	if (which == V4L2_SUBDEV_FORMAT_TRY)
809 		return v4l2_subdev_get_try_crop(&line->subdev, cfg,
810 						MSM_VFE_PAD_SRC);
811 
812 	return &line->crop;
813 }
814 
815 /*
816  * vfe_try_format - Handle try format by pad subdev method
817  * @line: VFE line
818  * @cfg: V4L2 subdev pad configuration
819  * @pad: pad on which format is requested
820  * @fmt: pointer to v4l2 format structure
821  * @which: wanted subdev format
822  */
823 static void vfe_try_format(struct vfe_line *line,
824 			   struct v4l2_subdev_pad_config *cfg,
825 			   unsigned int pad,
826 			   struct v4l2_mbus_framefmt *fmt,
827 			   enum v4l2_subdev_format_whence which)
828 {
829 	unsigned int i;
830 	u32 code;
831 
832 	switch (pad) {
833 	case MSM_VFE_PAD_SINK:
834 		/* Set format on sink pad */
835 
836 		for (i = 0; i < line->nformats; i++)
837 			if (fmt->code == line->formats[i].code)
838 				break;
839 
840 		/* If not found, use UYVY as default */
841 		if (i >= line->nformats)
842 			fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
843 
844 		fmt->width = clamp_t(u32, fmt->width, 1, 8191);
845 		fmt->height = clamp_t(u32, fmt->height, 1, 8191);
846 
847 		fmt->field = V4L2_FIELD_NONE;
848 		fmt->colorspace = V4L2_COLORSPACE_SRGB;
849 
850 		break;
851 
852 	case MSM_VFE_PAD_SRC:
853 		/* Set and return a format same as sink pad */
854 		code = fmt->code;
855 
856 		*fmt = *__vfe_get_format(line, cfg, MSM_VFE_PAD_SINK, which);
857 
858 		fmt->code = vfe_src_pad_code(line, fmt->code, 0, code);
859 
860 		if (line->id == VFE_LINE_PIX) {
861 			struct v4l2_rect *rect;
862 
863 			rect = __vfe_get_crop(line, cfg, which);
864 
865 			fmt->width = rect->width;
866 			fmt->height = rect->height;
867 		}
868 
869 		break;
870 	}
871 
872 	fmt->colorspace = V4L2_COLORSPACE_SRGB;
873 }
874 
875 /*
876  * vfe_try_compose - Handle try compose selection by pad subdev method
877  * @line: VFE line
878  * @cfg: V4L2 subdev pad configuration
879  * @rect: pointer to v4l2 rect structure
880  * @which: wanted subdev format
881  */
882 static void vfe_try_compose(struct vfe_line *line,
883 			    struct v4l2_subdev_pad_config *cfg,
884 			    struct v4l2_rect *rect,
885 			    enum v4l2_subdev_format_whence which)
886 {
887 	struct v4l2_mbus_framefmt *fmt;
888 
889 	fmt = __vfe_get_format(line, cfg, MSM_VFE_PAD_SINK, which);
890 
891 	if (rect->width > fmt->width)
892 		rect->width = fmt->width;
893 
894 	if (rect->height > fmt->height)
895 		rect->height = fmt->height;
896 
897 	if (fmt->width > rect->width * SCALER_RATIO_MAX)
898 		rect->width = (fmt->width + SCALER_RATIO_MAX - 1) /
899 							SCALER_RATIO_MAX;
900 
901 	rect->width &= ~0x1;
902 
903 	if (fmt->height > rect->height * SCALER_RATIO_MAX)
904 		rect->height = (fmt->height + SCALER_RATIO_MAX - 1) /
905 							SCALER_RATIO_MAX;
906 
907 	if (rect->width < 16)
908 		rect->width = 16;
909 
910 	if (rect->height < 4)
911 		rect->height = 4;
912 }
913 
914 /*
915  * vfe_try_crop - Handle try crop selection by pad subdev method
916  * @line: VFE line
917  * @cfg: V4L2 subdev pad configuration
918  * @rect: pointer to v4l2 rect structure
919  * @which: wanted subdev format
920  */
921 static void vfe_try_crop(struct vfe_line *line,
922 			 struct v4l2_subdev_pad_config *cfg,
923 			 struct v4l2_rect *rect,
924 			 enum v4l2_subdev_format_whence which)
925 {
926 	struct v4l2_rect *compose;
927 
928 	compose = __vfe_get_compose(line, cfg, which);
929 
930 	if (rect->width > compose->width)
931 		rect->width = compose->width;
932 
933 	if (rect->width + rect->left > compose->width)
934 		rect->left = compose->width - rect->width;
935 
936 	if (rect->height > compose->height)
937 		rect->height = compose->height;
938 
939 	if (rect->height + rect->top > compose->height)
940 		rect->top = compose->height - rect->height;
941 
942 	/* wm in line based mode writes multiple of 16 horizontally */
943 	rect->left += (rect->width & 0xf) >> 1;
944 	rect->width &= ~0xf;
945 
946 	if (rect->width < 16) {
947 		rect->left = 0;
948 		rect->width = 16;
949 	}
950 
951 	if (rect->height < 4) {
952 		rect->top = 0;
953 		rect->height = 4;
954 	}
955 }
956 
957 /*
958  * vfe_enum_mbus_code - Handle pixel format enumeration
959  * @sd: VFE V4L2 subdevice
960  * @cfg: V4L2 subdev pad configuration
961  * @code: pointer to v4l2_subdev_mbus_code_enum structure
962  *
963  * return -EINVAL or zero on success
964  */
965 static int vfe_enum_mbus_code(struct v4l2_subdev *sd,
966 			      struct v4l2_subdev_pad_config *cfg,
967 			      struct v4l2_subdev_mbus_code_enum *code)
968 {
969 	struct vfe_line *line = v4l2_get_subdevdata(sd);
970 
971 	if (code->pad == MSM_VFE_PAD_SINK) {
972 		if (code->index >= line->nformats)
973 			return -EINVAL;
974 
975 		code->code = line->formats[code->index].code;
976 	} else {
977 		struct v4l2_mbus_framefmt *sink_fmt;
978 
979 		sink_fmt = __vfe_get_format(line, cfg, MSM_VFE_PAD_SINK,
980 					    code->which);
981 
982 		code->code = vfe_src_pad_code(line, sink_fmt->code,
983 					      code->index, 0);
984 		if (!code->code)
985 			return -EINVAL;
986 	}
987 
988 	return 0;
989 }
990 
991 /*
992  * vfe_enum_frame_size - Handle frame size enumeration
993  * @sd: VFE V4L2 subdevice
994  * @cfg: V4L2 subdev pad configuration
995  * @fse: pointer to v4l2_subdev_frame_size_enum structure
996  *
997  * Return -EINVAL or zero on success
998  */
999 static int vfe_enum_frame_size(struct v4l2_subdev *sd,
1000 			       struct v4l2_subdev_pad_config *cfg,
1001 			       struct v4l2_subdev_frame_size_enum *fse)
1002 {
1003 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1004 	struct v4l2_mbus_framefmt format;
1005 
1006 	if (fse->index != 0)
1007 		return -EINVAL;
1008 
1009 	format.code = fse->code;
1010 	format.width = 1;
1011 	format.height = 1;
1012 	vfe_try_format(line, cfg, fse->pad, &format, fse->which);
1013 	fse->min_width = format.width;
1014 	fse->min_height = format.height;
1015 
1016 	if (format.code != fse->code)
1017 		return -EINVAL;
1018 
1019 	format.code = fse->code;
1020 	format.width = -1;
1021 	format.height = -1;
1022 	vfe_try_format(line, cfg, fse->pad, &format, fse->which);
1023 	fse->max_width = format.width;
1024 	fse->max_height = format.height;
1025 
1026 	return 0;
1027 }
1028 
1029 /*
1030  * vfe_get_format - Handle get format by pads subdev method
1031  * @sd: VFE V4L2 subdevice
1032  * @cfg: V4L2 subdev pad configuration
1033  * @fmt: pointer to v4l2 subdev format structure
1034  *
1035  * Return -EINVAL or zero on success
1036  */
1037 static int vfe_get_format(struct v4l2_subdev *sd,
1038 			  struct v4l2_subdev_pad_config *cfg,
1039 			  struct v4l2_subdev_format *fmt)
1040 {
1041 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1042 	struct v4l2_mbus_framefmt *format;
1043 
1044 	format = __vfe_get_format(line, cfg, fmt->pad, fmt->which);
1045 	if (format == NULL)
1046 		return -EINVAL;
1047 
1048 	fmt->format = *format;
1049 
1050 	return 0;
1051 }
1052 
1053 static int vfe_set_selection(struct v4l2_subdev *sd,
1054 			     struct v4l2_subdev_pad_config *cfg,
1055 			     struct v4l2_subdev_selection *sel);
1056 
1057 /*
1058  * vfe_set_format - Handle set format by pads subdev method
1059  * @sd: VFE V4L2 subdevice
1060  * @cfg: V4L2 subdev pad configuration
1061  * @fmt: pointer to v4l2 subdev format structure
1062  *
1063  * Return -EINVAL or zero on success
1064  */
1065 static int vfe_set_format(struct v4l2_subdev *sd,
1066 			  struct v4l2_subdev_pad_config *cfg,
1067 			  struct v4l2_subdev_format *fmt)
1068 {
1069 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1070 	struct v4l2_mbus_framefmt *format;
1071 
1072 	format = __vfe_get_format(line, cfg, fmt->pad, fmt->which);
1073 	if (format == NULL)
1074 		return -EINVAL;
1075 
1076 	vfe_try_format(line, cfg, fmt->pad, &fmt->format, fmt->which);
1077 	*format = fmt->format;
1078 
1079 	if (fmt->pad == MSM_VFE_PAD_SINK) {
1080 		struct v4l2_subdev_selection sel = { 0 };
1081 		int ret;
1082 
1083 		/* Propagate the format from sink to source */
1084 		format = __vfe_get_format(line, cfg, MSM_VFE_PAD_SRC,
1085 					  fmt->which);
1086 
1087 		*format = fmt->format;
1088 		vfe_try_format(line, cfg, MSM_VFE_PAD_SRC, format,
1089 			       fmt->which);
1090 
1091 		if (line->id != VFE_LINE_PIX)
1092 			return 0;
1093 
1094 		/* Reset sink pad compose selection */
1095 		sel.which = fmt->which;
1096 		sel.pad = MSM_VFE_PAD_SINK;
1097 		sel.target = V4L2_SEL_TGT_COMPOSE;
1098 		sel.r.width = fmt->format.width;
1099 		sel.r.height = fmt->format.height;
1100 		ret = vfe_set_selection(sd, cfg, &sel);
1101 		if (ret < 0)
1102 			return ret;
1103 	}
1104 
1105 	return 0;
1106 }
1107 
1108 /*
1109  * vfe_get_selection - Handle get selection by pads subdev method
1110  * @sd: VFE V4L2 subdevice
1111  * @cfg: V4L2 subdev pad configuration
1112  * @sel: pointer to v4l2 subdev selection structure
1113  *
1114  * Return -EINVAL or zero on success
1115  */
1116 static int vfe_get_selection(struct v4l2_subdev *sd,
1117 			     struct v4l2_subdev_pad_config *cfg,
1118 			     struct v4l2_subdev_selection *sel)
1119 {
1120 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1121 	struct v4l2_subdev_format fmt = { 0 };
1122 	struct v4l2_rect *rect;
1123 	int ret;
1124 
1125 	if (line->id != VFE_LINE_PIX)
1126 		return -EINVAL;
1127 
1128 	if (sel->pad == MSM_VFE_PAD_SINK)
1129 		switch (sel->target) {
1130 		case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1131 			fmt.pad = sel->pad;
1132 			fmt.which = sel->which;
1133 			ret = vfe_get_format(sd, cfg, &fmt);
1134 			if (ret < 0)
1135 				return ret;
1136 
1137 			sel->r.left = 0;
1138 			sel->r.top = 0;
1139 			sel->r.width = fmt.format.width;
1140 			sel->r.height = fmt.format.height;
1141 			break;
1142 		case V4L2_SEL_TGT_COMPOSE:
1143 			rect = __vfe_get_compose(line, cfg, sel->which);
1144 			if (rect == NULL)
1145 				return -EINVAL;
1146 
1147 			sel->r = *rect;
1148 			break;
1149 		default:
1150 			return -EINVAL;
1151 		}
1152 	else if (sel->pad == MSM_VFE_PAD_SRC)
1153 		switch (sel->target) {
1154 		case V4L2_SEL_TGT_CROP_BOUNDS:
1155 			rect = __vfe_get_compose(line, cfg, sel->which);
1156 			if (rect == NULL)
1157 				return -EINVAL;
1158 
1159 			sel->r.left = rect->left;
1160 			sel->r.top = rect->top;
1161 			sel->r.width = rect->width;
1162 			sel->r.height = rect->height;
1163 			break;
1164 		case V4L2_SEL_TGT_CROP:
1165 			rect = __vfe_get_crop(line, cfg, sel->which);
1166 			if (rect == NULL)
1167 				return -EINVAL;
1168 
1169 			sel->r = *rect;
1170 			break;
1171 		default:
1172 			return -EINVAL;
1173 		}
1174 
1175 	return 0;
1176 }
1177 
1178 /*
1179  * vfe_set_selection - Handle set selection by pads subdev method
1180  * @sd: VFE V4L2 subdevice
1181  * @cfg: V4L2 subdev pad configuration
1182  * @sel: pointer to v4l2 subdev selection structure
1183  *
1184  * Return -EINVAL or zero on success
1185  */
1186 static int vfe_set_selection(struct v4l2_subdev *sd,
1187 			     struct v4l2_subdev_pad_config *cfg,
1188 			     struct v4l2_subdev_selection *sel)
1189 {
1190 	struct vfe_line *line = v4l2_get_subdevdata(sd);
1191 	struct v4l2_rect *rect;
1192 	int ret;
1193 
1194 	if (line->id != VFE_LINE_PIX)
1195 		return -EINVAL;
1196 
1197 	if (sel->target == V4L2_SEL_TGT_COMPOSE &&
1198 		sel->pad == MSM_VFE_PAD_SINK) {
1199 		struct v4l2_subdev_selection crop = { 0 };
1200 
1201 		rect = __vfe_get_compose(line, cfg, sel->which);
1202 		if (rect == NULL)
1203 			return -EINVAL;
1204 
1205 		vfe_try_compose(line, cfg, &sel->r, sel->which);
1206 		*rect = sel->r;
1207 
1208 		/* Reset source crop selection */
1209 		crop.which = sel->which;
1210 		crop.pad = MSM_VFE_PAD_SRC;
1211 		crop.target = V4L2_SEL_TGT_CROP;
1212 		crop.r = *rect;
1213 		ret = vfe_set_selection(sd, cfg, &crop);
1214 	} else if (sel->target == V4L2_SEL_TGT_CROP &&
1215 		sel->pad == MSM_VFE_PAD_SRC) {
1216 		struct v4l2_subdev_format fmt = { 0 };
1217 
1218 		rect = __vfe_get_crop(line, cfg, sel->which);
1219 		if (rect == NULL)
1220 			return -EINVAL;
1221 
1222 		vfe_try_crop(line, cfg, &sel->r, sel->which);
1223 		*rect = sel->r;
1224 
1225 		/* Reset source pad format width and height */
1226 		fmt.which = sel->which;
1227 		fmt.pad = MSM_VFE_PAD_SRC;
1228 		ret = vfe_get_format(sd, cfg, &fmt);
1229 		if (ret < 0)
1230 			return ret;
1231 
1232 		fmt.format.width = rect->width;
1233 		fmt.format.height = rect->height;
1234 		ret = vfe_set_format(sd, cfg, &fmt);
1235 	} else {
1236 		ret = -EINVAL;
1237 	}
1238 
1239 	return ret;
1240 }
1241 
1242 /*
1243  * vfe_init_formats - Initialize formats on all pads
1244  * @sd: VFE V4L2 subdevice
1245  * @fh: V4L2 subdev file handle
1246  *
1247  * Initialize all pad formats with default values.
1248  *
1249  * Return 0 on success or a negative error code otherwise
1250  */
1251 static int vfe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1252 {
1253 	struct v4l2_subdev_format format = {
1254 		.pad = MSM_VFE_PAD_SINK,
1255 		.which = fh ? V4L2_SUBDEV_FORMAT_TRY :
1256 			      V4L2_SUBDEV_FORMAT_ACTIVE,
1257 		.format = {
1258 			.code = MEDIA_BUS_FMT_UYVY8_2X8,
1259 			.width = 1920,
1260 			.height = 1080
1261 		}
1262 	};
1263 
1264 	return vfe_set_format(sd, fh ? fh->pad : NULL, &format);
1265 }
1266 
1267 /*
1268  * msm_vfe_subdev_init - Initialize VFE device structure and resources
1269  * @vfe: VFE device
1270  * @res: VFE module resources table
1271  *
1272  * Return 0 on success or a negative error code otherwise
1273  */
1274 int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
1275 			const struct resources *res, u8 id)
1276 {
1277 	struct device *dev = camss->dev;
1278 	struct platform_device *pdev = to_platform_device(dev);
1279 	struct resource *r;
1280 	int i, j;
1281 	int ret;
1282 
1283 	switch (camss->version) {
1284 	case CAMSS_8x16:
1285 		vfe->ops = &vfe_ops_4_1;
1286 		break;
1287 	case CAMSS_8x96:
1288 		vfe->ops = &vfe_ops_4_7;
1289 		break;
1290 	case CAMSS_660:
1291 		vfe->ops = &vfe_ops_4_8;
1292 		break;
1293 
1294 	case CAMSS_845:
1295 		vfe->ops = &vfe_ops_170;
1296 		break;
1297 	default:
1298 		return -EINVAL;
1299 	}
1300 	vfe->ops->subdev_init(dev, vfe);
1301 
1302 	/* Memory */
1303 
1304 	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[0]);
1305 	vfe->base = devm_ioremap_resource(dev, r);
1306 	if (IS_ERR(vfe->base)) {
1307 		dev_err(dev, "could not map memory\n");
1308 		return PTR_ERR(vfe->base);
1309 	}
1310 
1311 	/* Interrupt */
1312 
1313 	r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1314 					 res->interrupt[0]);
1315 	if (!r) {
1316 		dev_err(dev, "missing IRQ\n");
1317 		return -EINVAL;
1318 	}
1319 
1320 	vfe->irq = r->start;
1321 	snprintf(vfe->irq_name, sizeof(vfe->irq_name), "%s_%s%d",
1322 		 dev_name(dev), MSM_VFE_NAME, vfe->id);
1323 	ret = devm_request_irq(dev, vfe->irq, vfe->ops->isr,
1324 			       IRQF_TRIGGER_RISING, vfe->irq_name, vfe);
1325 	if (ret < 0) {
1326 		dev_err(dev, "request_irq failed: %d\n", ret);
1327 		return ret;
1328 	}
1329 
1330 	/* Clocks */
1331 
1332 	vfe->nclocks = 0;
1333 	while (res->clock[vfe->nclocks])
1334 		vfe->nclocks++;
1335 
1336 	vfe->clock = devm_kcalloc(dev, vfe->nclocks, sizeof(*vfe->clock),
1337 				  GFP_KERNEL);
1338 	if (!vfe->clock)
1339 		return -ENOMEM;
1340 
1341 	for (i = 0; i < vfe->nclocks; i++) {
1342 		struct camss_clock *clock = &vfe->clock[i];
1343 
1344 		clock->clk = devm_clk_get(dev, res->clock[i]);
1345 		if (IS_ERR(clock->clk))
1346 			return PTR_ERR(clock->clk);
1347 
1348 		clock->name = res->clock[i];
1349 
1350 		clock->nfreqs = 0;
1351 		while (res->clock_rate[i][clock->nfreqs])
1352 			clock->nfreqs++;
1353 
1354 		if (!clock->nfreqs) {
1355 			clock->freq = NULL;
1356 			continue;
1357 		}
1358 
1359 		clock->freq = devm_kcalloc(dev,
1360 					   clock->nfreqs,
1361 					   sizeof(*clock->freq),
1362 					   GFP_KERNEL);
1363 		if (!clock->freq)
1364 			return -ENOMEM;
1365 
1366 		for (j = 0; j < clock->nfreqs; j++)
1367 			clock->freq[j] = res->clock_rate[i][j];
1368 	}
1369 
1370 	mutex_init(&vfe->power_lock);
1371 	vfe->power_count = 0;
1372 
1373 	mutex_init(&vfe->stream_lock);
1374 	vfe->stream_count = 0;
1375 
1376 	spin_lock_init(&vfe->output_lock);
1377 
1378 	vfe->camss = camss;
1379 	vfe->id = id;
1380 	vfe->reg_update = 0;
1381 
1382 	for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
1383 		struct vfe_line *l = &vfe->line[i];
1384 
1385 		l->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1386 		l->video_out.camss = camss;
1387 		l->id = i;
1388 		init_completion(&l->output.sof);
1389 		init_completion(&l->output.reg_update);
1390 
1391 		if (camss->version == CAMSS_8x16) {
1392 			if (i == VFE_LINE_PIX) {
1393 				l->formats = formats_pix_8x16;
1394 				l->nformats = ARRAY_SIZE(formats_pix_8x16);
1395 			} else {
1396 				l->formats = formats_rdi_8x16;
1397 				l->nformats = ARRAY_SIZE(formats_rdi_8x16);
1398 			}
1399 		} else if (camss->version == CAMSS_8x96 ||
1400 			   camss->version == CAMSS_660) {
1401 			if (i == VFE_LINE_PIX) {
1402 				l->formats = formats_pix_8x96;
1403 				l->nformats = ARRAY_SIZE(formats_pix_8x96);
1404 			} else {
1405 				l->formats = formats_rdi_8x96;
1406 				l->nformats = ARRAY_SIZE(formats_rdi_8x96);
1407 			}
1408 		} else if (camss->version == CAMSS_845) {
1409 			l->formats = formats_rdi_845;
1410 			l->nformats = ARRAY_SIZE(formats_rdi_845);
1411 		} else {
1412 			return -EINVAL;
1413 		}
1414 	}
1415 
1416 	init_completion(&vfe->reset_complete);
1417 	init_completion(&vfe->halt_complete);
1418 
1419 	return 0;
1420 }
1421 
1422 /*
1423  * msm_vfe_get_vfe_id - Get VFE HW module id
1424  * @entity: Pointer to VFE media entity structure
1425  * @id: Return CSID HW module id here
1426  */
1427 void msm_vfe_get_vfe_id(struct media_entity *entity, u8 *id)
1428 {
1429 	struct v4l2_subdev *sd;
1430 	struct vfe_line *line;
1431 	struct vfe_device *vfe;
1432 
1433 	sd = media_entity_to_v4l2_subdev(entity);
1434 	line = v4l2_get_subdevdata(sd);
1435 	vfe = to_vfe(line);
1436 
1437 	*id = vfe->id;
1438 }
1439 
1440 /*
1441  * msm_vfe_get_vfe_line_id - Get VFE line id by media entity
1442  * @entity: Pointer to VFE media entity structure
1443  * @id: Return VFE line id here
1444  */
1445 void msm_vfe_get_vfe_line_id(struct media_entity *entity, enum vfe_line_id *id)
1446 {
1447 	struct v4l2_subdev *sd;
1448 	struct vfe_line *line;
1449 
1450 	sd = media_entity_to_v4l2_subdev(entity);
1451 	line = v4l2_get_subdevdata(sd);
1452 
1453 	*id = line->id;
1454 }
1455 
1456 /*
1457  * vfe_link_setup - Setup VFE connections
1458  * @entity: Pointer to media entity structure
1459  * @local: Pointer to local pad
1460  * @remote: Pointer to remote pad
1461  * @flags: Link flags
1462  *
1463  * Return 0 on success
1464  */
1465 static int vfe_link_setup(struct media_entity *entity,
1466 			  const struct media_pad *local,
1467 			  const struct media_pad *remote, u32 flags)
1468 {
1469 	if (flags & MEDIA_LNK_FL_ENABLED)
1470 		if (media_entity_remote_pad(local))
1471 			return -EBUSY;
1472 
1473 	return 0;
1474 }
1475 
1476 static const struct v4l2_subdev_core_ops vfe_core_ops = {
1477 	.s_power = vfe_set_power,
1478 };
1479 
1480 static const struct v4l2_subdev_video_ops vfe_video_ops = {
1481 	.s_stream = vfe_set_stream,
1482 };
1483 
1484 static const struct v4l2_subdev_pad_ops vfe_pad_ops = {
1485 	.enum_mbus_code = vfe_enum_mbus_code,
1486 	.enum_frame_size = vfe_enum_frame_size,
1487 	.get_fmt = vfe_get_format,
1488 	.set_fmt = vfe_set_format,
1489 	.get_selection = vfe_get_selection,
1490 	.set_selection = vfe_set_selection,
1491 };
1492 
1493 static const struct v4l2_subdev_ops vfe_v4l2_ops = {
1494 	.core = &vfe_core_ops,
1495 	.video = &vfe_video_ops,
1496 	.pad = &vfe_pad_ops,
1497 };
1498 
1499 static const struct v4l2_subdev_internal_ops vfe_v4l2_internal_ops = {
1500 	.open = vfe_init_formats,
1501 };
1502 
1503 static const struct media_entity_operations vfe_media_ops = {
1504 	.link_setup = vfe_link_setup,
1505 	.link_validate = v4l2_subdev_link_validate,
1506 };
1507 
1508 /*
1509  * msm_vfe_register_entities - Register subdev node for VFE module
1510  * @vfe: VFE device
1511  * @v4l2_dev: V4L2 device
1512  *
1513  * Initialize and register a subdev node for the VFE module. Then
1514  * call msm_video_register() to register the video device node which
1515  * will be connected to this subdev node. Then actually create the
1516  * media link between them.
1517  *
1518  * Return 0 on success or a negative error code otherwise
1519  */
1520 int msm_vfe_register_entities(struct vfe_device *vfe,
1521 			      struct v4l2_device *v4l2_dev)
1522 {
1523 	struct device *dev = vfe->camss->dev;
1524 	struct v4l2_subdev *sd;
1525 	struct media_pad *pads;
1526 	struct camss_video *video_out;
1527 	int ret;
1528 	int i;
1529 
1530 	for (i = 0; i < vfe->line_num; i++) {
1531 		char name[32];
1532 
1533 		sd = &vfe->line[i].subdev;
1534 		pads = vfe->line[i].pads;
1535 		video_out = &vfe->line[i].video_out;
1536 
1537 		v4l2_subdev_init(sd, &vfe_v4l2_ops);
1538 		sd->internal_ops = &vfe_v4l2_internal_ops;
1539 		sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1540 		if (i == VFE_LINE_PIX)
1541 			snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s",
1542 				 MSM_VFE_NAME, vfe->id, "pix");
1543 		else
1544 			snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s%d",
1545 				 MSM_VFE_NAME, vfe->id, "rdi", i);
1546 
1547 		v4l2_set_subdevdata(sd, &vfe->line[i]);
1548 
1549 		ret = vfe_init_formats(sd, NULL);
1550 		if (ret < 0) {
1551 			dev_err(dev, "Failed to init format: %d\n", ret);
1552 			goto error_init;
1553 		}
1554 
1555 		pads[MSM_VFE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1556 		pads[MSM_VFE_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
1557 
1558 		sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1559 		sd->entity.ops = &vfe_media_ops;
1560 		ret = media_entity_pads_init(&sd->entity, MSM_VFE_PADS_NUM,
1561 					     pads);
1562 		if (ret < 0) {
1563 			dev_err(dev, "Failed to init media entity: %d\n", ret);
1564 			goto error_init;
1565 		}
1566 
1567 		ret = v4l2_device_register_subdev(v4l2_dev, sd);
1568 		if (ret < 0) {
1569 			dev_err(dev, "Failed to register subdev: %d\n", ret);
1570 			goto error_reg_subdev;
1571 		}
1572 
1573 		video_out->ops = &vfe->video_ops;
1574 		video_out->bpl_alignment = 8;
1575 		video_out->line_based = 0;
1576 		if (i == VFE_LINE_PIX) {
1577 			video_out->bpl_alignment = 16;
1578 			video_out->line_based = 1;
1579 		}
1580 		snprintf(name, ARRAY_SIZE(name), "%s%d_%s%d",
1581 			 MSM_VFE_NAME, vfe->id, "video", i);
1582 		ret = msm_video_register(video_out, v4l2_dev, name,
1583 					 i == VFE_LINE_PIX ? 1 : 0);
1584 		if (ret < 0) {
1585 			dev_err(dev, "Failed to register video node: %d\n",
1586 				ret);
1587 			goto error_reg_video;
1588 		}
1589 
1590 		ret = media_create_pad_link(
1591 				&sd->entity, MSM_VFE_PAD_SRC,
1592 				&video_out->vdev.entity, 0,
1593 				MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
1594 		if (ret < 0) {
1595 			dev_err(dev, "Failed to link %s->%s entities: %d\n",
1596 				sd->entity.name, video_out->vdev.entity.name,
1597 				ret);
1598 			goto error_link;
1599 		}
1600 	}
1601 
1602 	return 0;
1603 
1604 error_link:
1605 	msm_video_unregister(video_out);
1606 
1607 error_reg_video:
1608 	v4l2_device_unregister_subdev(sd);
1609 
1610 error_reg_subdev:
1611 	media_entity_cleanup(&sd->entity);
1612 
1613 error_init:
1614 	for (i--; i >= 0; i--) {
1615 		sd = &vfe->line[i].subdev;
1616 		video_out = &vfe->line[i].video_out;
1617 
1618 		msm_video_unregister(video_out);
1619 		v4l2_device_unregister_subdev(sd);
1620 		media_entity_cleanup(&sd->entity);
1621 	}
1622 
1623 	return ret;
1624 }
1625 
1626 /*
1627  * msm_vfe_unregister_entities - Unregister VFE module subdev node
1628  * @vfe: VFE device
1629  */
1630 void msm_vfe_unregister_entities(struct vfe_device *vfe)
1631 {
1632 	int i;
1633 
1634 	mutex_destroy(&vfe->power_lock);
1635 	mutex_destroy(&vfe->stream_lock);
1636 
1637 	for (i = 0; i < vfe->line_num; i++) {
1638 		struct v4l2_subdev *sd = &vfe->line[i].subdev;
1639 		struct camss_video *video_out = &vfe->line[i].video_out;
1640 
1641 		msm_video_unregister(video_out);
1642 		v4l2_device_unregister_subdev(sd);
1643 		media_entity_cleanup(&sd->entity);
1644 	}
1645 }
1646