1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * A virtual codec example device.
4  *
5  * Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
6  *
7  * This is a virtual codec device driver for testing the codec framework.
8  * It simulates a device that uses memory buffers for both source and
9  * destination and encodes or decodes the data.
10  */
11 
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/fs.h>
15 #include <linux/sched.h>
16 #include <linux/slab.h>
17 
18 #include <linux/platform_device.h>
19 #include <media/v4l2-mem2mem.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-ioctl.h>
22 #include <media/v4l2-ctrls.h>
23 #include <media/v4l2-event.h>
24 #include <media/videobuf2-vmalloc.h>
25 
26 #include "codec-v4l2-fwht.h"
27 
28 MODULE_DESCRIPTION("Virtual codec device");
29 MODULE_AUTHOR("Hans Verkuil <hans.verkuil@cisco.com>");
30 MODULE_LICENSE("GPL v2");
31 
32 static bool multiplanar;
33 module_param(multiplanar, bool, 0444);
34 MODULE_PARM_DESC(multiplanar,
35 		 " use multi-planar API instead of single-planar API");
36 
37 static unsigned int debug;
38 module_param(debug, uint, 0644);
39 MODULE_PARM_DESC(debug, " activates debug info");
40 
41 #define VICODEC_NAME		"vicodec"
42 #define MAX_WIDTH		4096U
43 #define MIN_WIDTH		640U
44 #define MAX_HEIGHT		2160U
45 #define MIN_HEIGHT		360U
46 
47 #define dprintk(dev, fmt, arg...) \
48 	v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
49 
50 
51 struct pixfmt_info {
52 	u32 id;
53 	unsigned int bytesperline_mult;
54 	unsigned int sizeimage_mult;
55 	unsigned int sizeimage_div;
56 	unsigned int luma_step;
57 	unsigned int chroma_step;
58 	/* Chroma plane subsampling */
59 	unsigned int width_div;
60 	unsigned int height_div;
61 };
62 
63 static const struct v4l2_fwht_pixfmt_info pixfmt_fwht = {
64 	V4L2_PIX_FMT_FWHT, 0, 3, 1, 1, 1, 1, 1, 0, 1
65 };
66 
67 static const struct v4l2_fwht_pixfmt_info pixfmt_stateless_fwht = {
68 	V4L2_PIX_FMT_FWHT_STATELESS, 0, 3, 1, 1, 1, 1, 1, 0, 1
69 };
70 
vicodec_dev_release(struct device * dev)71 static void vicodec_dev_release(struct device *dev)
72 {
73 }
74 
75 static struct platform_device vicodec_pdev = {
76 	.name		= VICODEC_NAME,
77 	.dev.release	= vicodec_dev_release,
78 };
79 
80 /* Per-queue, driver-specific private data */
81 struct vicodec_q_data {
82 	unsigned int		coded_width;
83 	unsigned int		coded_height;
84 	unsigned int		visible_width;
85 	unsigned int		visible_height;
86 	unsigned int		sizeimage;
87 	unsigned int		vb2_sizeimage;
88 	unsigned int		sequence;
89 	const struct v4l2_fwht_pixfmt_info *info;
90 };
91 
92 enum {
93 	V4L2_M2M_SRC = 0,
94 	V4L2_M2M_DST = 1,
95 };
96 
97 struct vicodec_dev_instance {
98 	struct video_device     vfd;
99 	struct mutex            mutex;
100 	spinlock_t              lock;
101 	struct v4l2_m2m_dev     *m2m_dev;
102 };
103 
104 struct vicodec_dev {
105 	struct v4l2_device	v4l2_dev;
106 	struct vicodec_dev_instance stateful_enc;
107 	struct vicodec_dev_instance stateful_dec;
108 	struct vicodec_dev_instance stateless_dec;
109 #ifdef CONFIG_MEDIA_CONTROLLER
110 	struct media_device	mdev;
111 #endif
112 
113 };
114 
115 struct vicodec_ctx {
116 	struct v4l2_fh		fh;
117 	struct vicodec_dev	*dev;
118 	bool			is_enc;
119 	bool			is_stateless;
120 	spinlock_t		*lock;
121 
122 	struct v4l2_ctrl_handler hdl;
123 
124 	/* Source and destination queue data */
125 	struct vicodec_q_data   q_data[2];
126 	struct v4l2_fwht_state	state;
127 
128 	u32			cur_buf_offset;
129 	u32			comp_max_size;
130 	u32			comp_size;
131 	u32			header_size;
132 	u32			comp_magic_cnt;
133 	bool			comp_has_frame;
134 	bool			comp_has_next_frame;
135 	bool			first_source_change_sent;
136 	bool			source_changed;
137 };
138 
139 static const struct v4l2_event vicodec_eos_event = {
140 	.type = V4L2_EVENT_EOS
141 };
142 
file2ctx(struct file * file)143 static inline struct vicodec_ctx *file2ctx(struct file *file)
144 {
145 	return container_of(file->private_data, struct vicodec_ctx, fh);
146 }
147 
get_q_data(struct vicodec_ctx * ctx,enum v4l2_buf_type type)148 static struct vicodec_q_data *get_q_data(struct vicodec_ctx *ctx,
149 					 enum v4l2_buf_type type)
150 {
151 	switch (type) {
152 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
153 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
154 		return &ctx->q_data[V4L2_M2M_SRC];
155 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
156 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
157 		return &ctx->q_data[V4L2_M2M_DST];
158 	default:
159 		break;
160 	}
161 	return NULL;
162 }
163 
copy_cap_to_ref(const u8 * cap,const struct v4l2_fwht_pixfmt_info * info,struct v4l2_fwht_state * state)164 static void copy_cap_to_ref(const u8 *cap, const struct v4l2_fwht_pixfmt_info *info,
165 		struct v4l2_fwht_state *state)
166 {
167 	int plane_idx;
168 	u8 *p_ref = state->ref_frame.buf;
169 	unsigned int cap_stride = state->stride;
170 	unsigned int ref_stride = state->ref_stride;
171 
172 	for (plane_idx = 0; plane_idx < info->planes_num; plane_idx++) {
173 		int i;
174 		unsigned int h_div = (plane_idx == 1 || plane_idx == 2) ?
175 			info->height_div : 1;
176 		const u8 *row_cap = cap;
177 		u8 *row_ref = p_ref;
178 
179 		if (info->planes_num == 3 && plane_idx == 1) {
180 			cap_stride /= 2;
181 			ref_stride /= 2;
182 		}
183 
184 		if (plane_idx == 1 &&
185 		    (info->id == V4L2_PIX_FMT_NV24 ||
186 		     info->id == V4L2_PIX_FMT_NV42)) {
187 			cap_stride *= 2;
188 			ref_stride *= 2;
189 		}
190 
191 		for (i = 0; i < state->visible_height / h_div; i++) {
192 			memcpy(row_ref, row_cap, ref_stride);
193 			row_ref += ref_stride;
194 			row_cap += cap_stride;
195 		}
196 		cap += cap_stride * (state->coded_height / h_div);
197 		p_ref += ref_stride * (state->coded_height / h_div);
198 	}
199 }
200 
validate_by_version(unsigned int flags,unsigned int version)201 static bool validate_by_version(unsigned int flags, unsigned int version)
202 {
203 	if (!version || version > V4L2_FWHT_VERSION)
204 		return false;
205 
206 	if (version >= 2) {
207 		unsigned int components_num = 1 +
208 			((flags & V4L2_FWHT_FL_COMPONENTS_NUM_MSK) >>
209 			 V4L2_FWHT_FL_COMPONENTS_NUM_OFFSET);
210 		unsigned int pixenc = flags & V4L2_FWHT_FL_PIXENC_MSK;
211 
212 		if (components_num == 0 || components_num > 4 || !pixenc)
213 			return false;
214 	}
215 	return true;
216 }
217 
validate_stateless_params_flags(const struct v4l2_ctrl_fwht_params * params,const struct v4l2_fwht_pixfmt_info * cur_info)218 static bool validate_stateless_params_flags(const struct v4l2_ctrl_fwht_params *params,
219 					    const struct v4l2_fwht_pixfmt_info *cur_info)
220 {
221 	unsigned int width_div =
222 		(params->flags & V4L2_FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
223 	unsigned int height_div =
224 		(params->flags & V4L2_FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
225 	unsigned int components_num = 3;
226 	unsigned int pixenc = 0;
227 
228 	if (params->version < 3)
229 		return false;
230 
231 	components_num = 1 + ((params->flags & V4L2_FWHT_FL_COMPONENTS_NUM_MSK) >>
232 			      V4L2_FWHT_FL_COMPONENTS_NUM_OFFSET);
233 	pixenc = (params->flags & V4L2_FWHT_FL_PIXENC_MSK);
234 	if (v4l2_fwht_validate_fmt(cur_info, width_div, height_div,
235 				    components_num, pixenc))
236 		return true;
237 	return false;
238 }
239 
240 
update_state_from_header(struct vicodec_ctx * ctx)241 static void update_state_from_header(struct vicodec_ctx *ctx)
242 {
243 	const struct fwht_cframe_hdr *p_hdr = &ctx->state.header;
244 
245 	ctx->state.visible_width = ntohl(p_hdr->width);
246 	ctx->state.visible_height = ntohl(p_hdr->height);
247 	ctx->state.colorspace = ntohl(p_hdr->colorspace);
248 	ctx->state.xfer_func = ntohl(p_hdr->xfer_func);
249 	ctx->state.ycbcr_enc = ntohl(p_hdr->ycbcr_enc);
250 	ctx->state.quantization = ntohl(p_hdr->quantization);
251 }
252 
device_process(struct vicodec_ctx * ctx,struct vb2_v4l2_buffer * src_vb,struct vb2_v4l2_buffer * dst_vb)253 static int device_process(struct vicodec_ctx *ctx,
254 			  struct vb2_v4l2_buffer *src_vb,
255 			  struct vb2_v4l2_buffer *dst_vb)
256 {
257 	struct vicodec_dev *dev = ctx->dev;
258 	struct v4l2_fwht_state *state = &ctx->state;
259 	u8 *p_src, *p_dst;
260 	int ret = 0;
261 
262 	if (ctx->is_enc || ctx->is_stateless)
263 		p_src = vb2_plane_vaddr(&src_vb->vb2_buf, 0);
264 	else
265 		p_src = state->compressed_frame;
266 
267 	if (ctx->is_stateless) {
268 		struct media_request *src_req = src_vb->vb2_buf.req_obj.req;
269 
270 		ret = v4l2_ctrl_request_setup(src_req, &ctx->hdl);
271 		if (ret)
272 			return ret;
273 		update_state_from_header(ctx);
274 
275 		ctx->state.header.size =
276 			htonl(vb2_get_plane_payload(&src_vb->vb2_buf, 0));
277 		/*
278 		 * set the reference buffer from the reference timestamp
279 		 * only if this is a P-frame
280 		 */
281 		if (!(ntohl(ctx->state.header.flags) & V4L2_FWHT_FL_I_FRAME)) {
282 			struct vb2_buffer *ref_vb2_buf;
283 			int ref_buf_idx;
284 			struct vb2_queue *vq_cap =
285 				v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
286 						V4L2_BUF_TYPE_VIDEO_CAPTURE);
287 
288 			ref_buf_idx = vb2_find_timestamp(vq_cap,
289 							 ctx->state.ref_frame_ts, 0);
290 			if (ref_buf_idx < 0)
291 				return -EINVAL;
292 
293 			ref_vb2_buf = vq_cap->bufs[ref_buf_idx];
294 			if (ref_vb2_buf->state == VB2_BUF_STATE_ERROR)
295 				ret = -EINVAL;
296 			ctx->state.ref_frame.buf =
297 				vb2_plane_vaddr(ref_vb2_buf, 0);
298 		} else {
299 			ctx->state.ref_frame.buf = NULL;
300 		}
301 	}
302 	p_dst = vb2_plane_vaddr(&dst_vb->vb2_buf, 0);
303 	if (!p_src || !p_dst) {
304 		v4l2_err(&dev->v4l2_dev,
305 			 "Acquiring kernel pointers to buffers failed\n");
306 		return -EFAULT;
307 	}
308 
309 	if (ctx->is_enc) {
310 		struct vicodec_q_data *q_src;
311 		int comp_sz_or_errcode;
312 
313 		q_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
314 		state->info = q_src->info;
315 		comp_sz_or_errcode = v4l2_fwht_encode(state, p_src, p_dst);
316 		if (comp_sz_or_errcode < 0)
317 			return comp_sz_or_errcode;
318 		vb2_set_plane_payload(&dst_vb->vb2_buf, 0, comp_sz_or_errcode);
319 	} else {
320 		struct vicodec_q_data *q_dst;
321 		unsigned int comp_frame_size = ntohl(ctx->state.header.size);
322 
323 		q_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
324 		if (comp_frame_size > ctx->comp_max_size)
325 			return -EINVAL;
326 		state->info = q_dst->info;
327 		ret = v4l2_fwht_decode(state, p_src, p_dst);
328 		if (ret < 0)
329 			return ret;
330 		if (!ctx->is_stateless)
331 			copy_cap_to_ref(p_dst, ctx->state.info, &ctx->state);
332 
333 		vb2_set_plane_payload(&dst_vb->vb2_buf, 0, q_dst->sizeimage);
334 		if (ntohl(ctx->state.header.flags) & V4L2_FWHT_FL_I_FRAME)
335 			dst_vb->flags |= V4L2_BUF_FLAG_KEYFRAME;
336 		else
337 			dst_vb->flags |= V4L2_BUF_FLAG_PFRAME;
338 	}
339 	return ret;
340 }
341 
342 /*
343  * mem2mem callbacks
344  */
get_next_header(struct vicodec_ctx * ctx,u8 ** pp,u32 sz)345 static enum vb2_buffer_state get_next_header(struct vicodec_ctx *ctx,
346 					     u8 **pp, u32 sz)
347 {
348 	static const u8 magic[] = {
349 		0x4f, 0x4f, 0x4f, 0x4f, 0xff, 0xff, 0xff, 0xff
350 	};
351 	u8 *p = *pp;
352 	u32 state;
353 	u8 *header = (u8 *)&ctx->state.header;
354 
355 	state = VB2_BUF_STATE_DONE;
356 
357 	if (!ctx->header_size) {
358 		state = VB2_BUF_STATE_ERROR;
359 		for (; p < *pp + sz; p++) {
360 			u32 copy;
361 
362 			p = memchr(p, magic[ctx->comp_magic_cnt],
363 				   *pp + sz - p);
364 			if (!p) {
365 				ctx->comp_magic_cnt = 0;
366 				p = *pp + sz;
367 				break;
368 			}
369 			copy = sizeof(magic) - ctx->comp_magic_cnt;
370 			if (*pp + sz - p < copy)
371 				copy = *pp + sz - p;
372 
373 			memcpy(header + ctx->comp_magic_cnt, p, copy);
374 			ctx->comp_magic_cnt += copy;
375 			if (!memcmp(header, magic, ctx->comp_magic_cnt)) {
376 				p += copy;
377 				state = VB2_BUF_STATE_DONE;
378 				break;
379 			}
380 			ctx->comp_magic_cnt = 0;
381 		}
382 		if (ctx->comp_magic_cnt < sizeof(magic)) {
383 			*pp = p;
384 			return state;
385 		}
386 		ctx->header_size = sizeof(magic);
387 	}
388 
389 	if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
390 		u32 copy = sizeof(struct fwht_cframe_hdr) - ctx->header_size;
391 
392 		if (*pp + sz - p < copy)
393 			copy = *pp + sz - p;
394 
395 		memcpy(header + ctx->header_size, p, copy);
396 		p += copy;
397 		ctx->header_size += copy;
398 	}
399 	*pp = p;
400 	return state;
401 }
402 
403 /* device_run() - prepares and starts the device */
device_run(void * priv)404 static void device_run(void *priv)
405 {
406 	struct vicodec_ctx *ctx = priv;
407 	struct vicodec_dev *dev = ctx->dev;
408 	struct vb2_v4l2_buffer *src_buf, *dst_buf;
409 	struct vicodec_q_data *q_src, *q_dst;
410 	u32 state;
411 	struct media_request *src_req;
412 
413 	src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
414 	dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
415 	src_req = src_buf->vb2_buf.req_obj.req;
416 
417 	q_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
418 	q_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
419 
420 	state = VB2_BUF_STATE_DONE;
421 	if (device_process(ctx, src_buf, dst_buf))
422 		state = VB2_BUF_STATE_ERROR;
423 	else
424 		dst_buf->sequence = q_dst->sequence++;
425 	dst_buf->flags &= ~V4L2_BUF_FLAG_LAST;
426 	v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, false);
427 
428 	spin_lock(ctx->lock);
429 	if (!ctx->comp_has_next_frame &&
430 	    v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx, src_buf)) {
431 		dst_buf->flags |= V4L2_BUF_FLAG_LAST;
432 		v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
433 		v4l2_m2m_mark_stopped(ctx->fh.m2m_ctx);
434 	}
435 	if (ctx->is_enc || ctx->is_stateless) {
436 		src_buf->sequence = q_src->sequence++;
437 		src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
438 		v4l2_m2m_buf_done(src_buf, state);
439 	} else if (vb2_get_plane_payload(&src_buf->vb2_buf, 0) == ctx->cur_buf_offset) {
440 		src_buf->sequence = q_src->sequence++;
441 		src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
442 		v4l2_m2m_buf_done(src_buf, state);
443 		ctx->cur_buf_offset = 0;
444 		ctx->comp_has_next_frame = false;
445 	}
446 	v4l2_m2m_buf_done(dst_buf, state);
447 
448 	ctx->comp_size = 0;
449 	ctx->header_size = 0;
450 	ctx->comp_magic_cnt = 0;
451 	ctx->comp_has_frame = false;
452 	spin_unlock(ctx->lock);
453 	if (ctx->is_stateless && src_req)
454 		v4l2_ctrl_request_complete(src_req, &ctx->hdl);
455 
456 	if (ctx->is_enc)
457 		v4l2_m2m_job_finish(dev->stateful_enc.m2m_dev, ctx->fh.m2m_ctx);
458 	else if (ctx->is_stateless)
459 		v4l2_m2m_job_finish(dev->stateless_dec.m2m_dev,
460 				    ctx->fh.m2m_ctx);
461 	else
462 		v4l2_m2m_job_finish(dev->stateful_dec.m2m_dev, ctx->fh.m2m_ctx);
463 }
464 
job_remove_src_buf(struct vicodec_ctx * ctx,u32 state)465 static void job_remove_src_buf(struct vicodec_ctx *ctx, u32 state)
466 {
467 	struct vb2_v4l2_buffer *src_buf;
468 	struct vicodec_q_data *q_src;
469 
470 	q_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
471 	spin_lock(ctx->lock);
472 	src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
473 	src_buf->sequence = q_src->sequence++;
474 	v4l2_m2m_buf_done(src_buf, state);
475 	ctx->cur_buf_offset = 0;
476 	spin_unlock(ctx->lock);
477 }
478 
479 static const struct v4l2_fwht_pixfmt_info *
info_from_header(const struct fwht_cframe_hdr * p_hdr)480 info_from_header(const struct fwht_cframe_hdr *p_hdr)
481 {
482 	unsigned int flags = ntohl(p_hdr->flags);
483 	unsigned int width_div = (flags & V4L2_FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
484 	unsigned int height_div = (flags & V4L2_FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
485 	unsigned int components_num = 3;
486 	unsigned int pixenc = 0;
487 	unsigned int version = ntohl(p_hdr->version);
488 
489 	if (version >= 2) {
490 		components_num = 1 + ((flags & V4L2_FWHT_FL_COMPONENTS_NUM_MSK) >>
491 				V4L2_FWHT_FL_COMPONENTS_NUM_OFFSET);
492 		pixenc = (flags & V4L2_FWHT_FL_PIXENC_MSK);
493 	}
494 	return v4l2_fwht_find_nth_fmt(width_div, height_div,
495 				     components_num, pixenc, 0);
496 }
497 
is_header_valid(const struct fwht_cframe_hdr * p_hdr)498 static bool is_header_valid(const struct fwht_cframe_hdr *p_hdr)
499 {
500 	const struct v4l2_fwht_pixfmt_info *info;
501 	unsigned int w = ntohl(p_hdr->width);
502 	unsigned int h = ntohl(p_hdr->height);
503 	unsigned int version = ntohl(p_hdr->version);
504 	unsigned int flags = ntohl(p_hdr->flags);
505 
506 	if (w < MIN_WIDTH || w > MAX_WIDTH || h < MIN_HEIGHT || h > MAX_HEIGHT)
507 		return false;
508 
509 	if (!validate_by_version(flags, version))
510 		return false;
511 
512 	info = info_from_header(p_hdr);
513 	if (!info)
514 		return false;
515 	return true;
516 }
517 
update_capture_data_from_header(struct vicodec_ctx * ctx)518 static void update_capture_data_from_header(struct vicodec_ctx *ctx)
519 {
520 	struct vicodec_q_data *q_dst = get_q_data(ctx,
521 						  V4L2_BUF_TYPE_VIDEO_CAPTURE);
522 	const struct fwht_cframe_hdr *p_hdr = &ctx->state.header;
523 	const struct v4l2_fwht_pixfmt_info *info = info_from_header(p_hdr);
524 	unsigned int flags = ntohl(p_hdr->flags);
525 	unsigned int hdr_width_div = (flags & V4L2_FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
526 	unsigned int hdr_height_div = (flags & V4L2_FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
527 
528 	/*
529 	 * This function should not be used by a stateless codec since
530 	 * it changes values in q_data that are not request specific
531 	 */
532 	WARN_ON(ctx->is_stateless);
533 
534 	q_dst->info = info;
535 	q_dst->visible_width = ntohl(p_hdr->width);
536 	q_dst->visible_height = ntohl(p_hdr->height);
537 	q_dst->coded_width = vic_round_dim(q_dst->visible_width, hdr_width_div);
538 	q_dst->coded_height = vic_round_dim(q_dst->visible_height,
539 					    hdr_height_div);
540 
541 	q_dst->sizeimage = q_dst->coded_width * q_dst->coded_height *
542 		q_dst->info->sizeimage_mult / q_dst->info->sizeimage_div;
543 	ctx->state.colorspace = ntohl(p_hdr->colorspace);
544 
545 	ctx->state.xfer_func = ntohl(p_hdr->xfer_func);
546 	ctx->state.ycbcr_enc = ntohl(p_hdr->ycbcr_enc);
547 	ctx->state.quantization = ntohl(p_hdr->quantization);
548 }
549 
set_last_buffer(struct vb2_v4l2_buffer * dst_buf,const struct vb2_v4l2_buffer * src_buf,struct vicodec_ctx * ctx)550 static void set_last_buffer(struct vb2_v4l2_buffer *dst_buf,
551 			    const struct vb2_v4l2_buffer *src_buf,
552 			    struct vicodec_ctx *ctx)
553 {
554 	struct vicodec_q_data *q_dst = get_q_data(ctx,
555 						  V4L2_BUF_TYPE_VIDEO_CAPTURE);
556 
557 	vb2_set_plane_payload(&dst_buf->vb2_buf, 0, 0);
558 	dst_buf->sequence = q_dst->sequence++;
559 
560 	v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, !ctx->is_enc);
561 	dst_buf->flags |= V4L2_BUF_FLAG_LAST;
562 	v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
563 }
564 
job_ready(void * priv)565 static int job_ready(void *priv)
566 {
567 	static const u8 magic[] = {
568 		0x4f, 0x4f, 0x4f, 0x4f, 0xff, 0xff, 0xff, 0xff
569 	};
570 	struct vicodec_ctx *ctx = priv;
571 	struct vb2_v4l2_buffer *src_buf;
572 	u8 *p_src;
573 	u8 *p;
574 	u32 sz;
575 	u32 state;
576 	struct vicodec_q_data *q_dst = get_q_data(ctx,
577 						  V4L2_BUF_TYPE_VIDEO_CAPTURE);
578 	unsigned int flags;
579 	unsigned int hdr_width_div;
580 	unsigned int hdr_height_div;
581 	unsigned int max_to_copy;
582 	unsigned int comp_frame_size;
583 
584 	if (ctx->source_changed)
585 		return 0;
586 	if (ctx->is_stateless || ctx->is_enc || ctx->comp_has_frame)
587 		return 1;
588 
589 restart:
590 	ctx->comp_has_next_frame = false;
591 	src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
592 	if (!src_buf)
593 		return 0;
594 	p_src = vb2_plane_vaddr(&src_buf->vb2_buf, 0);
595 	sz = vb2_get_plane_payload(&src_buf->vb2_buf, 0);
596 	p = p_src + ctx->cur_buf_offset;
597 
598 	state = VB2_BUF_STATE_DONE;
599 
600 	if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
601 		state = get_next_header(ctx, &p, p_src + sz - p);
602 		if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
603 			if (v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx,
604 							      src_buf))
605 				return 1;
606 			job_remove_src_buf(ctx, state);
607 			goto restart;
608 		}
609 	}
610 
611 	comp_frame_size = ntohl(ctx->state.header.size);
612 
613 	/*
614 	 * The current scanned frame might be the first frame of a new
615 	 * resolution so its size might be larger than ctx->comp_max_size.
616 	 * In that case it is copied up to the current buffer capacity and
617 	 * the copy will continue after allocating new large enough buffer
618 	 * when restreaming
619 	 */
620 	max_to_copy = min(comp_frame_size, ctx->comp_max_size);
621 
622 	if (ctx->comp_size < max_to_copy) {
623 		u32 copy = max_to_copy - ctx->comp_size;
624 
625 		if (copy > p_src + sz - p)
626 			copy = p_src + sz - p;
627 
628 		memcpy(ctx->state.compressed_frame + ctx->comp_size,
629 		       p, copy);
630 		p += copy;
631 		ctx->comp_size += copy;
632 		if (ctx->comp_size < max_to_copy) {
633 			if (v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx,
634 							      src_buf))
635 				return 1;
636 			job_remove_src_buf(ctx, state);
637 			goto restart;
638 		}
639 	}
640 	ctx->cur_buf_offset = p - p_src;
641 	if (ctx->comp_size == comp_frame_size)
642 		ctx->comp_has_frame = true;
643 	ctx->comp_has_next_frame = false;
644 	if (ctx->comp_has_frame && sz - ctx->cur_buf_offset >=
645 			sizeof(struct fwht_cframe_hdr)) {
646 		struct fwht_cframe_hdr *p_hdr = (struct fwht_cframe_hdr *)p;
647 		u32 frame_size = ntohl(p_hdr->size);
648 		u32 remaining = sz - ctx->cur_buf_offset - sizeof(*p_hdr);
649 
650 		if (!memcmp(p, magic, sizeof(magic)))
651 			ctx->comp_has_next_frame = remaining >= frame_size;
652 	}
653 	/*
654 	 * if the header is invalid the device_run will just drop the frame
655 	 * with an error
656 	 */
657 	if (!is_header_valid(&ctx->state.header) && ctx->comp_has_frame)
658 		return 1;
659 	flags = ntohl(ctx->state.header.flags);
660 	hdr_width_div = (flags & V4L2_FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
661 	hdr_height_div = (flags & V4L2_FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
662 
663 	if (ntohl(ctx->state.header.width) != q_dst->visible_width ||
664 	    ntohl(ctx->state.header.height) != q_dst->visible_height ||
665 	    !q_dst->info ||
666 	    hdr_width_div != q_dst->info->width_div ||
667 	    hdr_height_div != q_dst->info->height_div) {
668 		static const struct v4l2_event rs_event = {
669 			.type = V4L2_EVENT_SOURCE_CHANGE,
670 			.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
671 		};
672 
673 		struct vb2_v4l2_buffer *dst_buf =
674 			v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
675 
676 		update_capture_data_from_header(ctx);
677 		v4l2_event_queue_fh(&ctx->fh, &rs_event);
678 		set_last_buffer(dst_buf, src_buf, ctx);
679 		ctx->source_changed = true;
680 		return 0;
681 	}
682 	return 1;
683 }
684 
685 /*
686  * video ioctls
687  */
688 
find_fmt(u32 fmt)689 static const struct v4l2_fwht_pixfmt_info *find_fmt(u32 fmt)
690 {
691 	const struct v4l2_fwht_pixfmt_info *info =
692 		v4l2_fwht_find_pixfmt(fmt);
693 
694 	if (!info)
695 		info = v4l2_fwht_get_pixfmt(0);
696 	return info;
697 }
698 
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)699 static int vidioc_querycap(struct file *file, void *priv,
700 			   struct v4l2_capability *cap)
701 {
702 	strscpy(cap->driver, VICODEC_NAME, sizeof(cap->driver));
703 	strscpy(cap->card, VICODEC_NAME, sizeof(cap->card));
704 	snprintf(cap->bus_info, sizeof(cap->bus_info),
705 			"platform:%s", VICODEC_NAME);
706 	return 0;
707 }
708 
enum_fmt(struct v4l2_fmtdesc * f,struct vicodec_ctx * ctx,bool is_out)709 static int enum_fmt(struct v4l2_fmtdesc *f, struct vicodec_ctx *ctx,
710 		    bool is_out)
711 {
712 	bool is_uncomp = (ctx->is_enc && is_out) || (!ctx->is_enc && !is_out);
713 
714 	if (V4L2_TYPE_IS_MULTIPLANAR(f->type) && !multiplanar)
715 		return -EINVAL;
716 	if (!V4L2_TYPE_IS_MULTIPLANAR(f->type) && multiplanar)
717 		return -EINVAL;
718 
719 	if (is_uncomp) {
720 		const struct v4l2_fwht_pixfmt_info *info =
721 					get_q_data(ctx, f->type)->info;
722 
723 		if (ctx->is_enc ||
724 		    !vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q))
725 			info = v4l2_fwht_get_pixfmt(f->index);
726 		else
727 			info = v4l2_fwht_find_nth_fmt(info->width_div,
728 						     info->height_div,
729 						     info->components_num,
730 						     info->pixenc,
731 						     f->index);
732 		if (!info)
733 			return -EINVAL;
734 		f->pixelformat = info->id;
735 	} else {
736 		if (f->index)
737 			return -EINVAL;
738 		f->pixelformat = ctx->is_stateless ?
739 			V4L2_PIX_FMT_FWHT_STATELESS : V4L2_PIX_FMT_FWHT;
740 		if (!ctx->is_enc && !ctx->is_stateless)
741 			f->flags = V4L2_FMT_FLAG_DYN_RESOLUTION |
742 				   V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM;
743 	}
744 	return 0;
745 }
746 
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)747 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
748 				   struct v4l2_fmtdesc *f)
749 {
750 	struct vicodec_ctx *ctx = file2ctx(file);
751 
752 	return enum_fmt(f, ctx, false);
753 }
754 
vidioc_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * f)755 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
756 				   struct v4l2_fmtdesc *f)
757 {
758 	struct vicodec_ctx *ctx = file2ctx(file);
759 
760 	return enum_fmt(f, ctx, true);
761 }
762 
vidioc_g_fmt(struct vicodec_ctx * ctx,struct v4l2_format * f)763 static int vidioc_g_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f)
764 {
765 	struct vb2_queue *vq;
766 	struct vicodec_q_data *q_data;
767 	struct v4l2_pix_format_mplane *pix_mp;
768 	struct v4l2_pix_format *pix;
769 	const struct v4l2_fwht_pixfmt_info *info;
770 
771 	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
772 	if (!vq)
773 		return -EINVAL;
774 
775 	q_data = get_q_data(ctx, f->type);
776 	info = q_data->info;
777 
778 	switch (f->type) {
779 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
780 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
781 		if (multiplanar)
782 			return -EINVAL;
783 		pix = &f->fmt.pix;
784 		pix->width = q_data->coded_width;
785 		pix->height = q_data->coded_height;
786 		pix->field = V4L2_FIELD_NONE;
787 		pix->pixelformat = info->id;
788 		pix->bytesperline = q_data->coded_width *
789 					info->bytesperline_mult;
790 		pix->sizeimage = q_data->sizeimage;
791 		pix->colorspace = ctx->state.colorspace;
792 		pix->xfer_func = ctx->state.xfer_func;
793 		pix->ycbcr_enc = ctx->state.ycbcr_enc;
794 		pix->quantization = ctx->state.quantization;
795 		break;
796 
797 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
798 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
799 		if (!multiplanar)
800 			return -EINVAL;
801 		pix_mp = &f->fmt.pix_mp;
802 		pix_mp->width = q_data->coded_width;
803 		pix_mp->height = q_data->coded_height;
804 		pix_mp->field = V4L2_FIELD_NONE;
805 		pix_mp->pixelformat = info->id;
806 		pix_mp->num_planes = 1;
807 		pix_mp->plane_fmt[0].bytesperline =
808 				q_data->coded_width * info->bytesperline_mult;
809 		pix_mp->plane_fmt[0].sizeimage = q_data->sizeimage;
810 		pix_mp->colorspace = ctx->state.colorspace;
811 		pix_mp->xfer_func = ctx->state.xfer_func;
812 		pix_mp->ycbcr_enc = ctx->state.ycbcr_enc;
813 		pix_mp->quantization = ctx->state.quantization;
814 		break;
815 	default:
816 		return -EINVAL;
817 	}
818 	return 0;
819 }
820 
vidioc_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)821 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
822 				struct v4l2_format *f)
823 {
824 	return vidioc_g_fmt(file2ctx(file), f);
825 }
826 
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)827 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
828 				struct v4l2_format *f)
829 {
830 	return vidioc_g_fmt(file2ctx(file), f);
831 }
832 
vidioc_try_fmt(struct vicodec_ctx * ctx,struct v4l2_format * f)833 static int vidioc_try_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f)
834 {
835 	struct v4l2_pix_format_mplane *pix_mp;
836 	struct v4l2_pix_format *pix;
837 	struct v4l2_plane_pix_format *plane;
838 	const struct v4l2_fwht_pixfmt_info *info = ctx->is_stateless ?
839 		&pixfmt_stateless_fwht : &pixfmt_fwht;
840 
841 	switch (f->type) {
842 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
843 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
844 		pix = &f->fmt.pix;
845 		if (pix->pixelformat != V4L2_PIX_FMT_FWHT &&
846 		    pix->pixelformat != V4L2_PIX_FMT_FWHT_STATELESS)
847 			info = find_fmt(pix->pixelformat);
848 
849 		pix->width = clamp(pix->width, MIN_WIDTH, MAX_WIDTH);
850 		pix->width = vic_round_dim(pix->width, info->width_div);
851 
852 		pix->height = clamp(pix->height, MIN_HEIGHT, MAX_HEIGHT);
853 		pix->height = vic_round_dim(pix->height, info->height_div);
854 
855 		pix->field = V4L2_FIELD_NONE;
856 		pix->bytesperline =
857 			pix->width * info->bytesperline_mult;
858 		pix->sizeimage = pix->width * pix->height *
859 			info->sizeimage_mult / info->sizeimage_div;
860 		if (pix->pixelformat == V4L2_PIX_FMT_FWHT)
861 			pix->sizeimage += sizeof(struct fwht_cframe_hdr);
862 		break;
863 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
864 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
865 		pix_mp = &f->fmt.pix_mp;
866 		plane = pix_mp->plane_fmt;
867 		if (pix_mp->pixelformat != V4L2_PIX_FMT_FWHT &&
868 		    pix_mp->pixelformat != V4L2_PIX_FMT_FWHT_STATELESS)
869 			info = find_fmt(pix_mp->pixelformat);
870 		pix_mp->num_planes = 1;
871 
872 		pix_mp->width = clamp(pix_mp->width, MIN_WIDTH, MAX_WIDTH);
873 		pix_mp->width = vic_round_dim(pix_mp->width, info->width_div);
874 
875 		pix_mp->height = clamp(pix_mp->height, MIN_HEIGHT, MAX_HEIGHT);
876 		pix_mp->height = vic_round_dim(pix_mp->height,
877 					       info->height_div);
878 
879 		pix_mp->field = V4L2_FIELD_NONE;
880 		plane->bytesperline =
881 			pix_mp->width * info->bytesperline_mult;
882 		plane->sizeimage = pix_mp->width * pix_mp->height *
883 			info->sizeimage_mult / info->sizeimage_div;
884 		if (pix_mp->pixelformat == V4L2_PIX_FMT_FWHT)
885 			plane->sizeimage += sizeof(struct fwht_cframe_hdr);
886 		break;
887 	default:
888 		return -EINVAL;
889 	}
890 
891 	return 0;
892 }
893 
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)894 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
895 				  struct v4l2_format *f)
896 {
897 	struct vicodec_ctx *ctx = file2ctx(file);
898 	struct v4l2_pix_format_mplane *pix_mp;
899 	struct v4l2_pix_format *pix;
900 
901 	switch (f->type) {
902 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
903 		if (multiplanar)
904 			return -EINVAL;
905 		pix = &f->fmt.pix;
906 		pix->pixelformat = ctx->is_enc ? V4L2_PIX_FMT_FWHT :
907 				   find_fmt(f->fmt.pix.pixelformat)->id;
908 		pix->colorspace = ctx->state.colorspace;
909 		pix->xfer_func = ctx->state.xfer_func;
910 		pix->ycbcr_enc = ctx->state.ycbcr_enc;
911 		pix->quantization = ctx->state.quantization;
912 		break;
913 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
914 		if (!multiplanar)
915 			return -EINVAL;
916 		pix_mp = &f->fmt.pix_mp;
917 		pix_mp->pixelformat = ctx->is_enc ? V4L2_PIX_FMT_FWHT :
918 				      find_fmt(pix_mp->pixelformat)->id;
919 		pix_mp->colorspace = ctx->state.colorspace;
920 		pix_mp->xfer_func = ctx->state.xfer_func;
921 		pix_mp->ycbcr_enc = ctx->state.ycbcr_enc;
922 		pix_mp->quantization = ctx->state.quantization;
923 		break;
924 	default:
925 		return -EINVAL;
926 	}
927 
928 	return vidioc_try_fmt(ctx, f);
929 }
930 
vidioc_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)931 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
932 				  struct v4l2_format *f)
933 {
934 	struct vicodec_ctx *ctx = file2ctx(file);
935 	struct v4l2_pix_format_mplane *pix_mp;
936 	struct v4l2_pix_format *pix;
937 
938 	switch (f->type) {
939 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
940 		if (multiplanar)
941 			return -EINVAL;
942 		pix = &f->fmt.pix;
943 		if (ctx->is_enc)
944 			pix->pixelformat = find_fmt(pix->pixelformat)->id;
945 		else if (ctx->is_stateless)
946 			pix->pixelformat = V4L2_PIX_FMT_FWHT_STATELESS;
947 		else
948 			pix->pixelformat = V4L2_PIX_FMT_FWHT;
949 		if (!pix->colorspace)
950 			pix->colorspace = V4L2_COLORSPACE_REC709;
951 		break;
952 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
953 		if (!multiplanar)
954 			return -EINVAL;
955 		pix_mp = &f->fmt.pix_mp;
956 		if (ctx->is_enc)
957 			pix_mp->pixelformat = find_fmt(pix_mp->pixelformat)->id;
958 		else if (ctx->is_stateless)
959 			pix_mp->pixelformat = V4L2_PIX_FMT_FWHT_STATELESS;
960 		else
961 			pix_mp->pixelformat = V4L2_PIX_FMT_FWHT;
962 		if (!pix_mp->colorspace)
963 			pix_mp->colorspace = V4L2_COLORSPACE_REC709;
964 		break;
965 	default:
966 		return -EINVAL;
967 	}
968 
969 	return vidioc_try_fmt(ctx, f);
970 }
971 
vidioc_s_fmt(struct vicodec_ctx * ctx,struct v4l2_format * f)972 static int vidioc_s_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f)
973 {
974 	struct vicodec_q_data *q_data;
975 	struct vb2_queue *vq;
976 	bool fmt_changed = true;
977 	struct v4l2_pix_format_mplane *pix_mp;
978 	struct v4l2_pix_format *pix;
979 
980 	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
981 	if (!vq)
982 		return -EINVAL;
983 
984 	q_data = get_q_data(ctx, f->type);
985 	if (!q_data)
986 		return -EINVAL;
987 
988 	switch (f->type) {
989 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
990 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
991 		pix = &f->fmt.pix;
992 		if (ctx->is_enc && V4L2_TYPE_IS_OUTPUT(f->type))
993 			fmt_changed =
994 				!q_data->info ||
995 				q_data->info->id != pix->pixelformat ||
996 				q_data->coded_width != pix->width ||
997 				q_data->coded_height != pix->height;
998 
999 		if (vb2_is_busy(vq) && fmt_changed)
1000 			return -EBUSY;
1001 
1002 		if (pix->pixelformat == V4L2_PIX_FMT_FWHT)
1003 			q_data->info = &pixfmt_fwht;
1004 		else if (pix->pixelformat == V4L2_PIX_FMT_FWHT_STATELESS)
1005 			q_data->info = &pixfmt_stateless_fwht;
1006 		else
1007 			q_data->info = find_fmt(pix->pixelformat);
1008 		q_data->coded_width = pix->width;
1009 		q_data->coded_height = pix->height;
1010 		q_data->sizeimage = pix->sizeimage;
1011 		break;
1012 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1013 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1014 		pix_mp = &f->fmt.pix_mp;
1015 		if (ctx->is_enc && V4L2_TYPE_IS_OUTPUT(f->type))
1016 			fmt_changed =
1017 				!q_data->info ||
1018 				q_data->info->id != pix_mp->pixelformat ||
1019 				q_data->coded_width != pix_mp->width ||
1020 				q_data->coded_height != pix_mp->height;
1021 
1022 		if (vb2_is_busy(vq) && fmt_changed)
1023 			return -EBUSY;
1024 
1025 		if (pix_mp->pixelformat == V4L2_PIX_FMT_FWHT)
1026 			q_data->info = &pixfmt_fwht;
1027 		else if (pix_mp->pixelformat == V4L2_PIX_FMT_FWHT_STATELESS)
1028 			q_data->info = &pixfmt_stateless_fwht;
1029 		else
1030 			q_data->info = find_fmt(pix_mp->pixelformat);
1031 		q_data->coded_width = pix_mp->width;
1032 		q_data->coded_height = pix_mp->height;
1033 		q_data->sizeimage = pix_mp->plane_fmt[0].sizeimage;
1034 		break;
1035 	default:
1036 		return -EINVAL;
1037 	}
1038 
1039 	dprintk(ctx->dev,
1040 		"Setting format for type %d, coded wxh: %dx%d, fourcc: 0x%08x\n",
1041 		f->type, q_data->coded_width, q_data->coded_height,
1042 		q_data->info->id);
1043 
1044 	return 0;
1045 }
1046 
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)1047 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1048 				struct v4l2_format *f)
1049 {
1050 	int ret;
1051 
1052 	ret = vidioc_try_fmt_vid_cap(file, priv, f);
1053 	if (ret)
1054 		return ret;
1055 
1056 	return vidioc_s_fmt(file2ctx(file), f);
1057 }
1058 
vidioc_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)1059 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
1060 				struct v4l2_format *f)
1061 {
1062 	struct vicodec_ctx *ctx = file2ctx(file);
1063 	struct vicodec_q_data *q_data;
1064 	struct vicodec_q_data *q_data_cap;
1065 	struct v4l2_pix_format *pix;
1066 	struct v4l2_pix_format_mplane *pix_mp;
1067 	u32 coded_w = 0, coded_h = 0;
1068 	unsigned int size = 0;
1069 	int ret;
1070 
1071 	q_data = get_q_data(ctx, f->type);
1072 	q_data_cap = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1073 
1074 	ret = vidioc_try_fmt_vid_out(file, priv, f);
1075 	if (ret)
1076 		return ret;
1077 
1078 	if (ctx->is_enc) {
1079 		struct vb2_queue *vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
1080 		struct vb2_queue *vq_cap = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
1081 							   V4L2_BUF_TYPE_VIDEO_CAPTURE);
1082 		const struct v4l2_fwht_pixfmt_info *info = ctx->is_stateless ?
1083 			&pixfmt_stateless_fwht : &pixfmt_fwht;
1084 
1085 		if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1086 			coded_w = f->fmt.pix.width;
1087 			coded_h = f->fmt.pix.height;
1088 		} else {
1089 			coded_w = f->fmt.pix_mp.width;
1090 			coded_h = f->fmt.pix_mp.height;
1091 		}
1092 		if (vb2_is_busy(vq) && (coded_w != q_data->coded_width ||
1093 					coded_h != q_data->coded_height))
1094 			return -EBUSY;
1095 		size = coded_w * coded_h *
1096 			info->sizeimage_mult / info->sizeimage_div;
1097 		if (!ctx->is_stateless)
1098 			size += sizeof(struct fwht_cframe_hdr);
1099 
1100 		if (vb2_is_busy(vq_cap) && size > q_data_cap->sizeimage)
1101 			return -EBUSY;
1102 	}
1103 
1104 	ret = vidioc_s_fmt(file2ctx(file), f);
1105 	if (!ret) {
1106 		if (ctx->is_enc) {
1107 			q_data->visible_width = coded_w;
1108 			q_data->visible_height = coded_h;
1109 			q_data_cap->coded_width = coded_w;
1110 			q_data_cap->coded_height = coded_h;
1111 			q_data_cap->sizeimage = size;
1112 		}
1113 
1114 		switch (f->type) {
1115 		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1116 			pix = &f->fmt.pix;
1117 			ctx->state.colorspace = pix->colorspace;
1118 			ctx->state.xfer_func = pix->xfer_func;
1119 			ctx->state.ycbcr_enc = pix->ycbcr_enc;
1120 			ctx->state.quantization = pix->quantization;
1121 			break;
1122 		case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1123 			pix_mp = &f->fmt.pix_mp;
1124 			ctx->state.colorspace = pix_mp->colorspace;
1125 			ctx->state.xfer_func = pix_mp->xfer_func;
1126 			ctx->state.ycbcr_enc = pix_mp->ycbcr_enc;
1127 			ctx->state.quantization = pix_mp->quantization;
1128 			break;
1129 		default:
1130 			break;
1131 		}
1132 	}
1133 	return ret;
1134 }
1135 
vidioc_g_selection(struct file * file,void * priv,struct v4l2_selection * s)1136 static int vidioc_g_selection(struct file *file, void *priv,
1137 			      struct v4l2_selection *s)
1138 {
1139 	struct vicodec_ctx *ctx = file2ctx(file);
1140 	struct vicodec_q_data *q_data;
1141 
1142 	q_data = get_q_data(ctx, s->type);
1143 	if (!q_data)
1144 		return -EINVAL;
1145 	/*
1146 	 * encoder supports only cropping on the OUTPUT buffer
1147 	 * decoder supports only composing on the CAPTURE buffer
1148 	 */
1149 	if (ctx->is_enc && s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1150 		switch (s->target) {
1151 		case V4L2_SEL_TGT_CROP:
1152 			s->r.left = 0;
1153 			s->r.top = 0;
1154 			s->r.width = q_data->visible_width;
1155 			s->r.height = q_data->visible_height;
1156 			return 0;
1157 		case V4L2_SEL_TGT_CROP_DEFAULT:
1158 		case V4L2_SEL_TGT_CROP_BOUNDS:
1159 			s->r.left = 0;
1160 			s->r.top = 0;
1161 			s->r.width = q_data->coded_width;
1162 			s->r.height = q_data->coded_height;
1163 			return 0;
1164 		}
1165 	} else if (!ctx->is_enc && s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1166 		switch (s->target) {
1167 		case V4L2_SEL_TGT_COMPOSE:
1168 			s->r.left = 0;
1169 			s->r.top = 0;
1170 			s->r.width = q_data->visible_width;
1171 			s->r.height = q_data->visible_height;
1172 			return 0;
1173 		case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1174 		case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1175 			s->r.left = 0;
1176 			s->r.top = 0;
1177 			s->r.width = q_data->coded_width;
1178 			s->r.height = q_data->coded_height;
1179 			return 0;
1180 		}
1181 	}
1182 	return -EINVAL;
1183 }
1184 
vidioc_s_selection(struct file * file,void * priv,struct v4l2_selection * s)1185 static int vidioc_s_selection(struct file *file, void *priv,
1186 			      struct v4l2_selection *s)
1187 {
1188 	struct vicodec_ctx *ctx = file2ctx(file);
1189 	struct vicodec_q_data *q_data;
1190 
1191 	if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1192 		return -EINVAL;
1193 
1194 	q_data = get_q_data(ctx, s->type);
1195 	if (!q_data)
1196 		return -EINVAL;
1197 
1198 	if (!ctx->is_enc || s->target != V4L2_SEL_TGT_CROP)
1199 		return -EINVAL;
1200 
1201 	s->r.left = 0;
1202 	s->r.top = 0;
1203 	q_data->visible_width = clamp(s->r.width, MIN_WIDTH,
1204 				      q_data->coded_width);
1205 	s->r.width = q_data->visible_width;
1206 	q_data->visible_height = clamp(s->r.height, MIN_HEIGHT,
1207 				       q_data->coded_height);
1208 	s->r.height = q_data->visible_height;
1209 	return 0;
1210 }
1211 
vicodec_encoder_cmd(struct file * file,void * fh,struct v4l2_encoder_cmd * ec)1212 static int vicodec_encoder_cmd(struct file *file, void *fh,
1213 			    struct v4l2_encoder_cmd *ec)
1214 {
1215 	struct vicodec_ctx *ctx = file2ctx(file);
1216 	int ret;
1217 
1218 	ret = v4l2_m2m_ioctl_try_encoder_cmd(file, fh, ec);
1219 	if (ret < 0)
1220 		return ret;
1221 
1222 	if (!vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q) ||
1223 	    !vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))
1224 		return 0;
1225 
1226 	ret = v4l2_m2m_ioctl_encoder_cmd(file, fh, ec);
1227 	if (ret < 0)
1228 		return ret;
1229 
1230 	if (ec->cmd == V4L2_ENC_CMD_STOP &&
1231 	    v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1232 		v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1233 
1234 	if (ec->cmd == V4L2_ENC_CMD_START &&
1235 	    v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1236 		vb2_clear_last_buffer_dequeued(&ctx->fh.m2m_ctx->cap_q_ctx.q);
1237 
1238 	return 0;
1239 }
1240 
vicodec_decoder_cmd(struct file * file,void * fh,struct v4l2_decoder_cmd * dc)1241 static int vicodec_decoder_cmd(struct file *file, void *fh,
1242 			    struct v4l2_decoder_cmd *dc)
1243 {
1244 	struct vicodec_ctx *ctx = file2ctx(file);
1245 	int ret;
1246 
1247 	ret = v4l2_m2m_ioctl_try_decoder_cmd(file, fh, dc);
1248 	if (ret < 0)
1249 		return ret;
1250 
1251 	if (!vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q) ||
1252 	    !vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))
1253 		return 0;
1254 
1255 	ret = v4l2_m2m_ioctl_decoder_cmd(file, fh, dc);
1256 	if (ret < 0)
1257 		return ret;
1258 
1259 	if (dc->cmd == V4L2_DEC_CMD_STOP &&
1260 	    v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1261 		v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1262 
1263 	if (dc->cmd == V4L2_DEC_CMD_START &&
1264 	    v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1265 		vb2_clear_last_buffer_dequeued(&ctx->fh.m2m_ctx->cap_q_ctx.q);
1266 
1267 	return 0;
1268 }
1269 
vicodec_enum_framesizes(struct file * file,void * fh,struct v4l2_frmsizeenum * fsize)1270 static int vicodec_enum_framesizes(struct file *file, void *fh,
1271 				   struct v4l2_frmsizeenum *fsize)
1272 {
1273 	switch (fsize->pixel_format) {
1274 	case V4L2_PIX_FMT_FWHT_STATELESS:
1275 		break;
1276 	case V4L2_PIX_FMT_FWHT:
1277 		break;
1278 	default:
1279 		if (find_fmt(fsize->pixel_format)->id == fsize->pixel_format)
1280 			break;
1281 		return -EINVAL;
1282 	}
1283 
1284 	if (fsize->index)
1285 		return -EINVAL;
1286 
1287 	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1288 
1289 	fsize->stepwise.min_width = MIN_WIDTH;
1290 	fsize->stepwise.max_width = MAX_WIDTH;
1291 	fsize->stepwise.step_width = 8;
1292 	fsize->stepwise.min_height = MIN_HEIGHT;
1293 	fsize->stepwise.max_height = MAX_HEIGHT;
1294 	fsize->stepwise.step_height = 8;
1295 
1296 	return 0;
1297 }
1298 
vicodec_subscribe_event(struct v4l2_fh * fh,const struct v4l2_event_subscription * sub)1299 static int vicodec_subscribe_event(struct v4l2_fh *fh,
1300 				const struct v4l2_event_subscription *sub)
1301 {
1302 	struct vicodec_ctx *ctx = container_of(fh, struct vicodec_ctx, fh);
1303 
1304 	switch (sub->type) {
1305 	case V4L2_EVENT_SOURCE_CHANGE:
1306 		if (ctx->is_enc)
1307 			return -EINVAL;
1308 		fallthrough;
1309 	case V4L2_EVENT_EOS:
1310 		if (ctx->is_stateless)
1311 			return -EINVAL;
1312 		return v4l2_event_subscribe(fh, sub, 0, NULL);
1313 	default:
1314 		return v4l2_ctrl_subscribe_event(fh, sub);
1315 	}
1316 }
1317 
1318 static const struct v4l2_ioctl_ops vicodec_ioctl_ops = {
1319 	.vidioc_querycap	= vidioc_querycap,
1320 
1321 	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1322 	.vidioc_g_fmt_vid_cap	= vidioc_g_fmt_vid_cap,
1323 	.vidioc_try_fmt_vid_cap	= vidioc_try_fmt_vid_cap,
1324 	.vidioc_s_fmt_vid_cap	= vidioc_s_fmt_vid_cap,
1325 
1326 	.vidioc_g_fmt_vid_cap_mplane	= vidioc_g_fmt_vid_cap,
1327 	.vidioc_try_fmt_vid_cap_mplane	= vidioc_try_fmt_vid_cap,
1328 	.vidioc_s_fmt_vid_cap_mplane	= vidioc_s_fmt_vid_cap,
1329 
1330 	.vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
1331 	.vidioc_g_fmt_vid_out	= vidioc_g_fmt_vid_out,
1332 	.vidioc_try_fmt_vid_out	= vidioc_try_fmt_vid_out,
1333 	.vidioc_s_fmt_vid_out	= vidioc_s_fmt_vid_out,
1334 
1335 	.vidioc_g_fmt_vid_out_mplane	= vidioc_g_fmt_vid_out,
1336 	.vidioc_try_fmt_vid_out_mplane	= vidioc_try_fmt_vid_out,
1337 	.vidioc_s_fmt_vid_out_mplane	= vidioc_s_fmt_vid_out,
1338 
1339 	.vidioc_reqbufs		= v4l2_m2m_ioctl_reqbufs,
1340 	.vidioc_querybuf	= v4l2_m2m_ioctl_querybuf,
1341 	.vidioc_qbuf		= v4l2_m2m_ioctl_qbuf,
1342 	.vidioc_dqbuf		= v4l2_m2m_ioctl_dqbuf,
1343 	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
1344 	.vidioc_create_bufs	= v4l2_m2m_ioctl_create_bufs,
1345 	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,
1346 
1347 	.vidioc_streamon	= v4l2_m2m_ioctl_streamon,
1348 	.vidioc_streamoff	= v4l2_m2m_ioctl_streamoff,
1349 
1350 	.vidioc_g_selection	= vidioc_g_selection,
1351 	.vidioc_s_selection	= vidioc_s_selection,
1352 
1353 	.vidioc_try_encoder_cmd	= v4l2_m2m_ioctl_try_encoder_cmd,
1354 	.vidioc_encoder_cmd	= vicodec_encoder_cmd,
1355 	.vidioc_try_decoder_cmd	= v4l2_m2m_ioctl_try_decoder_cmd,
1356 	.vidioc_decoder_cmd	= vicodec_decoder_cmd,
1357 	.vidioc_enum_framesizes = vicodec_enum_framesizes,
1358 
1359 	.vidioc_subscribe_event = vicodec_subscribe_event,
1360 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1361 };
1362 
1363 
1364 /*
1365  * Queue operations
1366  */
1367 
vicodec_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])1368 static int vicodec_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
1369 			       unsigned int *nplanes, unsigned int sizes[],
1370 			       struct device *alloc_devs[])
1371 {
1372 	struct vicodec_ctx *ctx = vb2_get_drv_priv(vq);
1373 	struct vicodec_q_data *q_data = get_q_data(ctx, vq->type);
1374 	unsigned int size = q_data->sizeimage;
1375 
1376 	if (*nplanes)
1377 		return sizes[0] < size ? -EINVAL : 0;
1378 
1379 	*nplanes = 1;
1380 	sizes[0] = size;
1381 	q_data->vb2_sizeimage = size;
1382 	return 0;
1383 }
1384 
vicodec_buf_out_validate(struct vb2_buffer * vb)1385 static int vicodec_buf_out_validate(struct vb2_buffer *vb)
1386 {
1387 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1388 
1389 	vbuf->field = V4L2_FIELD_NONE;
1390 	return 0;
1391 }
1392 
vicodec_buf_prepare(struct vb2_buffer * vb)1393 static int vicodec_buf_prepare(struct vb2_buffer *vb)
1394 {
1395 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1396 	struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1397 	struct vicodec_q_data *q_data;
1398 
1399 	dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
1400 
1401 	q_data = get_q_data(ctx, vb->vb2_queue->type);
1402 	if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
1403 		if (vbuf->field == V4L2_FIELD_ANY)
1404 			vbuf->field = V4L2_FIELD_NONE;
1405 		if (vbuf->field != V4L2_FIELD_NONE) {
1406 			dprintk(ctx->dev, "%s field isn't supported\n",
1407 					__func__);
1408 			return -EINVAL;
1409 		}
1410 	}
1411 
1412 	if (vb2_plane_size(vb, 0) < q_data->vb2_sizeimage) {
1413 		dprintk(ctx->dev,
1414 			"%s data will not fit into plane (%lu < %lu)\n",
1415 			__func__, vb2_plane_size(vb, 0),
1416 			(long)q_data->vb2_sizeimage);
1417 		return -EINVAL;
1418 	}
1419 
1420 	return 0;
1421 }
1422 
vicodec_buf_queue(struct vb2_buffer * vb)1423 static void vicodec_buf_queue(struct vb2_buffer *vb)
1424 {
1425 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1426 	struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1427 	unsigned int sz = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
1428 	u8 *p_src = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
1429 	u8 *p = p_src;
1430 	struct vb2_queue *vq_out = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
1431 						   V4L2_BUF_TYPE_VIDEO_OUTPUT);
1432 	struct vb2_queue *vq_cap = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
1433 						   V4L2_BUF_TYPE_VIDEO_CAPTURE);
1434 	bool header_valid = false;
1435 	static const struct v4l2_event rs_event = {
1436 		.type = V4L2_EVENT_SOURCE_CHANGE,
1437 		.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
1438 	};
1439 
1440 	if (V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type) &&
1441 	    vb2_is_streaming(vb->vb2_queue) &&
1442 	    v4l2_m2m_dst_buf_is_last(ctx->fh.m2m_ctx)) {
1443 		unsigned int i;
1444 
1445 		for (i = 0; i < vb->num_planes; i++)
1446 			vb2_set_plane_payload(vb, i, 0);
1447 
1448 		vbuf->field = V4L2_FIELD_NONE;
1449 		vbuf->sequence =
1450 			get_q_data(ctx, vb->vb2_queue->type)->sequence++;
1451 
1452 		v4l2_m2m_last_buffer_done(ctx->fh.m2m_ctx, vbuf);
1453 		v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1454 		return;
1455 	}
1456 
1457 	/* buf_queue handles only the first source change event */
1458 	if (ctx->first_source_change_sent) {
1459 		v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1460 		return;
1461 	}
1462 
1463 	/*
1464 	 * if both queues are streaming, the source change event is
1465 	 * handled in job_ready
1466 	 */
1467 	if (vb2_is_streaming(vq_cap) && vb2_is_streaming(vq_out)) {
1468 		v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1469 		return;
1470 	}
1471 
1472 	/*
1473 	 * source change event is relevant only for the stateful decoder
1474 	 * in the compressed stream
1475 	 */
1476 	if (ctx->is_stateless || ctx->is_enc ||
1477 	    V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type)) {
1478 		v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1479 		return;
1480 	}
1481 
1482 	do {
1483 		enum vb2_buffer_state state =
1484 			get_next_header(ctx, &p, p_src + sz - p);
1485 
1486 		if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
1487 			v4l2_m2m_buf_done(vbuf, state);
1488 			return;
1489 		}
1490 		header_valid = is_header_valid(&ctx->state.header);
1491 		/*
1492 		 * p points right after the end of the header in the
1493 		 * buffer. If the header is invalid we set p to point
1494 		 * to the next byte after the start of the header
1495 		 */
1496 		if (!header_valid) {
1497 			p = p - sizeof(struct fwht_cframe_hdr) + 1;
1498 			if (p < p_src)
1499 				p = p_src;
1500 			ctx->header_size = 0;
1501 			ctx->comp_magic_cnt = 0;
1502 		}
1503 
1504 	} while (!header_valid);
1505 
1506 	ctx->cur_buf_offset = p - p_src;
1507 	update_capture_data_from_header(ctx);
1508 	ctx->first_source_change_sent = true;
1509 	v4l2_event_queue_fh(&ctx->fh, &rs_event);
1510 	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1511 }
1512 
vicodec_return_bufs(struct vb2_queue * q,u32 state)1513 static void vicodec_return_bufs(struct vb2_queue *q, u32 state)
1514 {
1515 	struct vicodec_ctx *ctx = vb2_get_drv_priv(q);
1516 	struct vb2_v4l2_buffer *vbuf;
1517 
1518 	for (;;) {
1519 		if (V4L2_TYPE_IS_OUTPUT(q->type))
1520 			vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
1521 		else
1522 			vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
1523 		if (vbuf == NULL)
1524 			return;
1525 		v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req,
1526 					   &ctx->hdl);
1527 		spin_lock(ctx->lock);
1528 		v4l2_m2m_buf_done(vbuf, state);
1529 		spin_unlock(ctx->lock);
1530 	}
1531 }
1532 
total_frame_size(struct vicodec_q_data * q_data)1533 static unsigned int total_frame_size(struct vicodec_q_data *q_data)
1534 {
1535 	unsigned int size;
1536 	unsigned int chroma_div;
1537 
1538 	if (!q_data->info) {
1539 		WARN_ON(1);
1540 		return 0;
1541 	}
1542 	size = q_data->coded_width * q_data->coded_height;
1543 	chroma_div = q_data->info->width_div * q_data->info->height_div;
1544 
1545 	if (q_data->info->components_num == 4)
1546 		return 2 * size + 2 * (size / chroma_div);
1547 	else if (q_data->info->components_num == 3)
1548 		return size + 2 * (size / chroma_div);
1549 	return size;
1550 }
1551 
vicodec_start_streaming(struct vb2_queue * q,unsigned int count)1552 static int vicodec_start_streaming(struct vb2_queue *q,
1553 				   unsigned int count)
1554 {
1555 	struct vicodec_ctx *ctx = vb2_get_drv_priv(q);
1556 	struct vicodec_q_data *q_data = get_q_data(ctx, q->type);
1557 	struct v4l2_fwht_state *state = &ctx->state;
1558 	const struct v4l2_fwht_pixfmt_info *info = q_data->info;
1559 	unsigned int size = q_data->coded_width * q_data->coded_height;
1560 	unsigned int chroma_div;
1561 	unsigned int total_planes_size;
1562 	u8 *new_comp_frame = NULL;
1563 
1564 	chroma_div = info->width_div * info->height_div;
1565 	q_data->sequence = 0;
1566 
1567 	v4l2_m2m_update_start_streaming_state(ctx->fh.m2m_ctx, q);
1568 
1569 	state->gop_cnt = 0;
1570 
1571 	if ((V4L2_TYPE_IS_OUTPUT(q->type) && !ctx->is_enc) ||
1572 	    (V4L2_TYPE_IS_CAPTURE(q->type) && ctx->is_enc))
1573 		return 0;
1574 
1575 	if (info->id == V4L2_PIX_FMT_FWHT ||
1576 	    info->id == V4L2_PIX_FMT_FWHT_STATELESS) {
1577 		vicodec_return_bufs(q, VB2_BUF_STATE_QUEUED);
1578 		return -EINVAL;
1579 	}
1580 	total_planes_size = total_frame_size(q_data);
1581 	ctx->comp_max_size = total_planes_size;
1582 
1583 	state->visible_width = q_data->visible_width;
1584 	state->visible_height = q_data->visible_height;
1585 	state->coded_width = q_data->coded_width;
1586 	state->coded_height = q_data->coded_height;
1587 	state->stride = q_data->coded_width *
1588 				info->bytesperline_mult;
1589 
1590 	if (ctx->is_stateless) {
1591 		state->ref_stride = state->stride;
1592 		return 0;
1593 	}
1594 	state->ref_stride = q_data->coded_width * info->luma_alpha_step;
1595 
1596 	state->ref_frame.buf = kvmalloc(total_planes_size, GFP_KERNEL);
1597 	state->ref_frame.luma = state->ref_frame.buf;
1598 	new_comp_frame = kvmalloc(ctx->comp_max_size, GFP_KERNEL);
1599 
1600 	if (!state->ref_frame.luma || !new_comp_frame) {
1601 		kvfree(state->ref_frame.luma);
1602 		kvfree(new_comp_frame);
1603 		vicodec_return_bufs(q, VB2_BUF_STATE_QUEUED);
1604 		return -ENOMEM;
1605 	}
1606 	/*
1607 	 * if state->compressed_frame was already allocated then
1608 	 * it contain data of the first frame of the new resolution
1609 	 */
1610 	if (state->compressed_frame) {
1611 		if (ctx->comp_size > ctx->comp_max_size)
1612 			ctx->comp_size = ctx->comp_max_size;
1613 
1614 		memcpy(new_comp_frame,
1615 		       state->compressed_frame, ctx->comp_size);
1616 	}
1617 
1618 	kvfree(state->compressed_frame);
1619 	state->compressed_frame = new_comp_frame;
1620 
1621 	if (info->components_num < 3) {
1622 		state->ref_frame.cb = NULL;
1623 		state->ref_frame.cr = NULL;
1624 		state->ref_frame.alpha = NULL;
1625 		return 0;
1626 	}
1627 
1628 	state->ref_frame.cb = state->ref_frame.luma + size;
1629 	state->ref_frame.cr = state->ref_frame.cb + size / chroma_div;
1630 
1631 	if (info->components_num == 4)
1632 		state->ref_frame.alpha =
1633 			state->ref_frame.cr + size / chroma_div;
1634 	else
1635 		state->ref_frame.alpha = NULL;
1636 
1637 	return 0;
1638 }
1639 
vicodec_stop_streaming(struct vb2_queue * q)1640 static void vicodec_stop_streaming(struct vb2_queue *q)
1641 {
1642 	struct vicodec_ctx *ctx = vb2_get_drv_priv(q);
1643 
1644 	vicodec_return_bufs(q, VB2_BUF_STATE_ERROR);
1645 
1646 	v4l2_m2m_update_stop_streaming_state(ctx->fh.m2m_ctx, q);
1647 
1648 	if (V4L2_TYPE_IS_OUTPUT(q->type) &&
1649 	    v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1650 		v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1651 
1652 	if (!ctx->is_enc && V4L2_TYPE_IS_OUTPUT(q->type))
1653 		ctx->first_source_change_sent = false;
1654 
1655 	if ((!V4L2_TYPE_IS_OUTPUT(q->type) && !ctx->is_enc) ||
1656 	    (V4L2_TYPE_IS_OUTPUT(q->type) && ctx->is_enc)) {
1657 		if (!ctx->is_stateless)
1658 			kvfree(ctx->state.ref_frame.buf);
1659 		ctx->state.ref_frame.buf = NULL;
1660 		ctx->state.ref_frame.luma = NULL;
1661 		ctx->comp_max_size = 0;
1662 		ctx->source_changed = false;
1663 	}
1664 	if (V4L2_TYPE_IS_OUTPUT(q->type) && !ctx->is_enc) {
1665 		ctx->cur_buf_offset = 0;
1666 		ctx->comp_size = 0;
1667 		ctx->header_size = 0;
1668 		ctx->comp_magic_cnt = 0;
1669 		ctx->comp_has_frame = false;
1670 		ctx->comp_has_next_frame = false;
1671 	}
1672 }
1673 
vicodec_buf_request_complete(struct vb2_buffer * vb)1674 static void vicodec_buf_request_complete(struct vb2_buffer *vb)
1675 {
1676 	struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1677 
1678 	v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl);
1679 }
1680 
1681 
1682 static const struct vb2_ops vicodec_qops = {
1683 	.queue_setup		= vicodec_queue_setup,
1684 	.buf_out_validate	= vicodec_buf_out_validate,
1685 	.buf_prepare		= vicodec_buf_prepare,
1686 	.buf_queue		= vicodec_buf_queue,
1687 	.buf_request_complete	= vicodec_buf_request_complete,
1688 	.start_streaming	= vicodec_start_streaming,
1689 	.stop_streaming		= vicodec_stop_streaming,
1690 	.wait_prepare		= vb2_ops_wait_prepare,
1691 	.wait_finish		= vb2_ops_wait_finish,
1692 };
1693 
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)1694 static int queue_init(void *priv, struct vb2_queue *src_vq,
1695 		      struct vb2_queue *dst_vq)
1696 {
1697 	struct vicodec_ctx *ctx = priv;
1698 	int ret;
1699 
1700 	src_vq->type = (multiplanar ?
1701 			V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
1702 			V4L2_BUF_TYPE_VIDEO_OUTPUT);
1703 	src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1704 	src_vq->drv_priv = ctx;
1705 	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1706 	src_vq->ops = &vicodec_qops;
1707 	src_vq->mem_ops = &vb2_vmalloc_memops;
1708 	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1709 	if (ctx->is_enc)
1710 		src_vq->lock = &ctx->dev->stateful_enc.mutex;
1711 	else if (ctx->is_stateless)
1712 		src_vq->lock = &ctx->dev->stateless_dec.mutex;
1713 	else
1714 		src_vq->lock = &ctx->dev->stateful_dec.mutex;
1715 	src_vq->supports_requests = ctx->is_stateless;
1716 	src_vq->requires_requests = ctx->is_stateless;
1717 	ret = vb2_queue_init(src_vq);
1718 	if (ret)
1719 		return ret;
1720 
1721 	dst_vq->type = (multiplanar ?
1722 			V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
1723 			V4L2_BUF_TYPE_VIDEO_CAPTURE);
1724 	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1725 	dst_vq->drv_priv = ctx;
1726 	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1727 	dst_vq->ops = &vicodec_qops;
1728 	dst_vq->mem_ops = &vb2_vmalloc_memops;
1729 	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1730 	dst_vq->lock = src_vq->lock;
1731 
1732 	return vb2_queue_init(dst_vq);
1733 }
1734 
vicodec_try_ctrl(struct v4l2_ctrl * ctrl)1735 static int vicodec_try_ctrl(struct v4l2_ctrl *ctrl)
1736 {
1737 	struct vicodec_ctx *ctx = container_of(ctrl->handler,
1738 			struct vicodec_ctx, hdl);
1739 	const struct v4l2_ctrl_fwht_params *params;
1740 	struct vicodec_q_data *q_dst = get_q_data(ctx,
1741 			V4L2_BUF_TYPE_VIDEO_CAPTURE);
1742 
1743 	switch (ctrl->id) {
1744 	case V4L2_CID_STATELESS_FWHT_PARAMS:
1745 		if (!q_dst->info)
1746 			return -EINVAL;
1747 		params = ctrl->p_new.p_fwht_params;
1748 		if (params->width > q_dst->coded_width ||
1749 		    params->width < MIN_WIDTH ||
1750 		    params->height > q_dst->coded_height ||
1751 		    params->height < MIN_HEIGHT)
1752 			return -EINVAL;
1753 		if (!validate_by_version(params->flags, params->version))
1754 			return -EINVAL;
1755 		if (!validate_stateless_params_flags(params, q_dst->info))
1756 			return -EINVAL;
1757 		return 0;
1758 	default:
1759 		return 0;
1760 	}
1761 	return 0;
1762 }
1763 
update_header_from_stateless_params(struct vicodec_ctx * ctx,const struct v4l2_ctrl_fwht_params * params)1764 static void update_header_from_stateless_params(struct vicodec_ctx *ctx,
1765 						const struct v4l2_ctrl_fwht_params *params)
1766 {
1767 	struct fwht_cframe_hdr *p_hdr = &ctx->state.header;
1768 
1769 	p_hdr->magic1 = FWHT_MAGIC1;
1770 	p_hdr->magic2 = FWHT_MAGIC2;
1771 	p_hdr->version = htonl(params->version);
1772 	p_hdr->width = htonl(params->width);
1773 	p_hdr->height = htonl(params->height);
1774 	p_hdr->flags = htonl(params->flags);
1775 	p_hdr->colorspace = htonl(params->colorspace);
1776 	p_hdr->xfer_func = htonl(params->xfer_func);
1777 	p_hdr->ycbcr_enc = htonl(params->ycbcr_enc);
1778 	p_hdr->quantization = htonl(params->quantization);
1779 }
1780 
vicodec_s_ctrl(struct v4l2_ctrl * ctrl)1781 static int vicodec_s_ctrl(struct v4l2_ctrl *ctrl)
1782 {
1783 	struct vicodec_ctx *ctx = container_of(ctrl->handler,
1784 					       struct vicodec_ctx, hdl);
1785 	const struct v4l2_ctrl_fwht_params *params;
1786 
1787 	switch (ctrl->id) {
1788 	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
1789 		ctx->state.gop_size = ctrl->val;
1790 		return 0;
1791 	case V4L2_CID_FWHT_I_FRAME_QP:
1792 		ctx->state.i_frame_qp = ctrl->val;
1793 		return 0;
1794 	case V4L2_CID_FWHT_P_FRAME_QP:
1795 		ctx->state.p_frame_qp = ctrl->val;
1796 		return 0;
1797 	case V4L2_CID_STATELESS_FWHT_PARAMS:
1798 		params = ctrl->p_new.p_fwht_params;
1799 		update_header_from_stateless_params(ctx, params);
1800 		ctx->state.ref_frame_ts = params->backward_ref_ts;
1801 		return 0;
1802 	}
1803 	return -EINVAL;
1804 }
1805 
1806 static const struct v4l2_ctrl_ops vicodec_ctrl_ops = {
1807 	.s_ctrl = vicodec_s_ctrl,
1808 	.try_ctrl = vicodec_try_ctrl,
1809 };
1810 
1811 static const struct v4l2_ctrl_config vicodec_ctrl_stateless_state = {
1812 	.ops		= &vicodec_ctrl_ops,
1813 	.id		= V4L2_CID_STATELESS_FWHT_PARAMS,
1814 	.elem_size      = sizeof(struct v4l2_ctrl_fwht_params),
1815 };
1816 
1817 /*
1818  * File operations
1819  */
vicodec_open(struct file * file)1820 static int vicodec_open(struct file *file)
1821 {
1822 	const struct v4l2_fwht_pixfmt_info *info = v4l2_fwht_get_pixfmt(0);
1823 	struct video_device *vfd = video_devdata(file);
1824 	struct vicodec_dev *dev = video_drvdata(file);
1825 	struct vicodec_ctx *ctx = NULL;
1826 	struct v4l2_ctrl_handler *hdl;
1827 	unsigned int raw_size;
1828 	unsigned int comp_size;
1829 	int rc = 0;
1830 
1831 	if (mutex_lock_interruptible(vfd->lock))
1832 		return -ERESTARTSYS;
1833 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1834 	if (!ctx) {
1835 		rc = -ENOMEM;
1836 		goto open_unlock;
1837 	}
1838 
1839 	if (vfd == &dev->stateful_enc.vfd)
1840 		ctx->is_enc = true;
1841 	else if (vfd == &dev->stateless_dec.vfd)
1842 		ctx->is_stateless = true;
1843 
1844 	v4l2_fh_init(&ctx->fh, video_devdata(file));
1845 	file->private_data = &ctx->fh;
1846 	ctx->dev = dev;
1847 	hdl = &ctx->hdl;
1848 	v4l2_ctrl_handler_init(hdl, 5);
1849 	v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_MPEG_VIDEO_GOP_SIZE,
1850 			  1, 16, 1, 10);
1851 	v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_FWHT_I_FRAME_QP,
1852 			  1, 31, 1, 20);
1853 	v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_FWHT_P_FRAME_QP,
1854 			  1, 31, 1, 20);
1855 	if (ctx->is_enc)
1856 		v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops,
1857 				  V4L2_CID_MIN_BUFFERS_FOR_OUTPUT, 1, 1, 1, 1);
1858 	if (ctx->is_stateless)
1859 		v4l2_ctrl_new_custom(hdl, &vicodec_ctrl_stateless_state, NULL);
1860 	if (hdl->error) {
1861 		rc = hdl->error;
1862 		v4l2_ctrl_handler_free(hdl);
1863 		kfree(ctx);
1864 		goto open_unlock;
1865 	}
1866 	ctx->fh.ctrl_handler = hdl;
1867 	v4l2_ctrl_handler_setup(hdl);
1868 
1869 	if (ctx->is_enc)
1870 		ctx->q_data[V4L2_M2M_SRC].info = info;
1871 	else if (ctx->is_stateless)
1872 		ctx->q_data[V4L2_M2M_SRC].info = &pixfmt_stateless_fwht;
1873 	else
1874 		ctx->q_data[V4L2_M2M_SRC].info = &pixfmt_fwht;
1875 	ctx->q_data[V4L2_M2M_SRC].coded_width = 1280;
1876 	ctx->q_data[V4L2_M2M_SRC].coded_height = 720;
1877 	ctx->q_data[V4L2_M2M_SRC].visible_width = 1280;
1878 	ctx->q_data[V4L2_M2M_SRC].visible_height = 720;
1879 	raw_size = 1280 * 720 * info->sizeimage_mult / info->sizeimage_div;
1880 	comp_size = 1280 * 720 * pixfmt_fwht.sizeimage_mult /
1881 				 pixfmt_fwht.sizeimage_div;
1882 	if (ctx->is_enc)
1883 		ctx->q_data[V4L2_M2M_SRC].sizeimage = raw_size;
1884 	else if (ctx->is_stateless)
1885 		ctx->q_data[V4L2_M2M_SRC].sizeimage = comp_size;
1886 	else
1887 		ctx->q_data[V4L2_M2M_SRC].sizeimage =
1888 			comp_size + sizeof(struct fwht_cframe_hdr);
1889 	ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
1890 	if (ctx->is_enc) {
1891 		ctx->q_data[V4L2_M2M_DST].info = &pixfmt_fwht;
1892 		ctx->q_data[V4L2_M2M_DST].sizeimage =
1893 			comp_size + sizeof(struct fwht_cframe_hdr);
1894 	} else {
1895 		ctx->q_data[V4L2_M2M_DST].info = info;
1896 		ctx->q_data[V4L2_M2M_DST].sizeimage = raw_size;
1897 	}
1898 
1899 	ctx->state.colorspace = V4L2_COLORSPACE_REC709;
1900 
1901 	if (ctx->is_enc) {
1902 		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_enc.m2m_dev,
1903 						    ctx, &queue_init);
1904 		ctx->lock = &dev->stateful_enc.lock;
1905 	} else if (ctx->is_stateless) {
1906 		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateless_dec.m2m_dev,
1907 						    ctx, &queue_init);
1908 		ctx->lock = &dev->stateless_dec.lock;
1909 	} else {
1910 		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_dec.m2m_dev,
1911 						    ctx, &queue_init);
1912 		ctx->lock = &dev->stateful_dec.lock;
1913 	}
1914 
1915 	if (IS_ERR(ctx->fh.m2m_ctx)) {
1916 		rc = PTR_ERR(ctx->fh.m2m_ctx);
1917 
1918 		v4l2_ctrl_handler_free(hdl);
1919 		v4l2_fh_exit(&ctx->fh);
1920 		kfree(ctx);
1921 		goto open_unlock;
1922 	}
1923 
1924 	v4l2_fh_add(&ctx->fh);
1925 
1926 open_unlock:
1927 	mutex_unlock(vfd->lock);
1928 	return rc;
1929 }
1930 
vicodec_release(struct file * file)1931 static int vicodec_release(struct file *file)
1932 {
1933 	struct video_device *vfd = video_devdata(file);
1934 	struct vicodec_ctx *ctx = file2ctx(file);
1935 
1936 	mutex_lock(vfd->lock);
1937 	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1938 	mutex_unlock(vfd->lock);
1939 	v4l2_fh_del(&ctx->fh);
1940 	v4l2_fh_exit(&ctx->fh);
1941 	v4l2_ctrl_handler_free(&ctx->hdl);
1942 	kvfree(ctx->state.compressed_frame);
1943 	kfree(ctx);
1944 
1945 	return 0;
1946 }
1947 
vicodec_request_validate(struct media_request * req)1948 static int vicodec_request_validate(struct media_request *req)
1949 {
1950 	struct media_request_object *obj;
1951 	struct v4l2_ctrl_handler *parent_hdl, *hdl;
1952 	struct vicodec_ctx *ctx = NULL;
1953 	struct v4l2_ctrl *ctrl;
1954 	unsigned int count;
1955 
1956 	list_for_each_entry(obj, &req->objects, list) {
1957 		struct vb2_buffer *vb;
1958 
1959 		if (vb2_request_object_is_buffer(obj)) {
1960 			vb = container_of(obj, struct vb2_buffer, req_obj);
1961 			ctx = vb2_get_drv_priv(vb->vb2_queue);
1962 
1963 			break;
1964 		}
1965 	}
1966 
1967 	if (!ctx) {
1968 		pr_err("No buffer was provided with the request\n");
1969 		return -ENOENT;
1970 	}
1971 
1972 	count = vb2_request_buffer_cnt(req);
1973 	if (!count) {
1974 		v4l2_info(&ctx->dev->v4l2_dev,
1975 			  "No buffer was provided with the request\n");
1976 		return -ENOENT;
1977 	} else if (count > 1) {
1978 		v4l2_info(&ctx->dev->v4l2_dev,
1979 			  "More than one buffer was provided with the request\n");
1980 		return -EINVAL;
1981 	}
1982 
1983 	parent_hdl = &ctx->hdl;
1984 
1985 	hdl = v4l2_ctrl_request_hdl_find(req, parent_hdl);
1986 	if (!hdl) {
1987 		v4l2_info(&ctx->dev->v4l2_dev, "Missing codec control\n");
1988 		return -ENOENT;
1989 	}
1990 	ctrl = v4l2_ctrl_request_hdl_ctrl_find(hdl,
1991 					       vicodec_ctrl_stateless_state.id);
1992 	v4l2_ctrl_request_hdl_put(hdl);
1993 	if (!ctrl) {
1994 		v4l2_info(&ctx->dev->v4l2_dev,
1995 			  "Missing required codec control\n");
1996 		return -ENOENT;
1997 	}
1998 
1999 	return vb2_request_validate(req);
2000 }
2001 
2002 static const struct v4l2_file_operations vicodec_fops = {
2003 	.owner		= THIS_MODULE,
2004 	.open		= vicodec_open,
2005 	.release	= vicodec_release,
2006 	.poll		= v4l2_m2m_fop_poll,
2007 	.unlocked_ioctl	= video_ioctl2,
2008 	.mmap		= v4l2_m2m_fop_mmap,
2009 };
2010 
2011 static const struct video_device vicodec_videodev = {
2012 	.name		= VICODEC_NAME,
2013 	.vfl_dir	= VFL_DIR_M2M,
2014 	.fops		= &vicodec_fops,
2015 	.ioctl_ops	= &vicodec_ioctl_ops,
2016 	.minor		= -1,
2017 	.release	= video_device_release_empty,
2018 };
2019 
2020 static const struct media_device_ops vicodec_m2m_media_ops = {
2021 	.req_validate	= vicodec_request_validate,
2022 	.req_queue	= v4l2_m2m_request_queue,
2023 };
2024 
2025 static const struct v4l2_m2m_ops m2m_ops = {
2026 	.device_run	= device_run,
2027 	.job_ready	= job_ready,
2028 };
2029 
register_instance(struct vicodec_dev * dev,struct vicodec_dev_instance * dev_instance,const char * name,bool is_enc)2030 static int register_instance(struct vicodec_dev *dev,
2031 			     struct vicodec_dev_instance *dev_instance,
2032 			     const char *name, bool is_enc)
2033 {
2034 	struct video_device *vfd;
2035 	int ret;
2036 
2037 	spin_lock_init(&dev_instance->lock);
2038 	mutex_init(&dev_instance->mutex);
2039 	dev_instance->m2m_dev = v4l2_m2m_init(&m2m_ops);
2040 	if (IS_ERR(dev_instance->m2m_dev)) {
2041 		v4l2_err(&dev->v4l2_dev, "Failed to init vicodec enc device\n");
2042 		return PTR_ERR(dev_instance->m2m_dev);
2043 	}
2044 
2045 	dev_instance->vfd = vicodec_videodev;
2046 	vfd = &dev_instance->vfd;
2047 	vfd->lock = &dev_instance->mutex;
2048 	vfd->v4l2_dev = &dev->v4l2_dev;
2049 	strscpy(vfd->name, name, sizeof(vfd->name));
2050 	vfd->device_caps = V4L2_CAP_STREAMING |
2051 		(multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
2052 	if (is_enc) {
2053 		v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
2054 		v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
2055 	} else {
2056 		v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
2057 		v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
2058 	}
2059 	video_set_drvdata(vfd, dev);
2060 
2061 	ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
2062 	if (ret) {
2063 		v4l2_err(&dev->v4l2_dev, "Failed to register video device '%s'\n", name);
2064 		v4l2_m2m_release(dev_instance->m2m_dev);
2065 		return ret;
2066 	}
2067 	v4l2_info(&dev->v4l2_dev, "Device '%s' registered as /dev/video%d\n",
2068 		  name, vfd->num);
2069 	return 0;
2070 }
2071 
vicodec_v4l2_dev_release(struct v4l2_device * v4l2_dev)2072 static void vicodec_v4l2_dev_release(struct v4l2_device *v4l2_dev)
2073 {
2074 	struct vicodec_dev *dev = container_of(v4l2_dev, struct vicodec_dev, v4l2_dev);
2075 
2076 	v4l2_device_unregister(&dev->v4l2_dev);
2077 	v4l2_m2m_release(dev->stateful_enc.m2m_dev);
2078 	v4l2_m2m_release(dev->stateful_dec.m2m_dev);
2079 	v4l2_m2m_release(dev->stateless_dec.m2m_dev);
2080 #ifdef CONFIG_MEDIA_CONTROLLER
2081 	media_device_cleanup(&dev->mdev);
2082 #endif
2083 	kfree(dev);
2084 }
2085 
vicodec_probe(struct platform_device * pdev)2086 static int vicodec_probe(struct platform_device *pdev)
2087 {
2088 	struct vicodec_dev *dev;
2089 	int ret;
2090 
2091 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2092 	if (!dev)
2093 		return -ENOMEM;
2094 
2095 	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
2096 	if (ret)
2097 		goto free_dev;
2098 
2099 	dev->v4l2_dev.release = vicodec_v4l2_dev_release;
2100 
2101 #ifdef CONFIG_MEDIA_CONTROLLER
2102 	dev->mdev.dev = &pdev->dev;
2103 	strscpy(dev->mdev.model, "vicodec", sizeof(dev->mdev.model));
2104 	strscpy(dev->mdev.bus_info, "platform:vicodec",
2105 		sizeof(dev->mdev.bus_info));
2106 	media_device_init(&dev->mdev);
2107 	dev->mdev.ops = &vicodec_m2m_media_ops;
2108 	dev->v4l2_dev.mdev = &dev->mdev;
2109 #endif
2110 
2111 	platform_set_drvdata(pdev, dev);
2112 
2113 	ret = register_instance(dev, &dev->stateful_enc, "stateful-encoder",
2114 				true);
2115 	if (ret)
2116 		goto unreg_dev;
2117 
2118 	ret = register_instance(dev, &dev->stateful_dec, "stateful-decoder",
2119 				false);
2120 	if (ret)
2121 		goto unreg_sf_enc;
2122 
2123 	ret = register_instance(dev, &dev->stateless_dec, "stateless-decoder",
2124 				false);
2125 	if (ret)
2126 		goto unreg_sf_dec;
2127 
2128 #ifdef CONFIG_MEDIA_CONTROLLER
2129 	ret = v4l2_m2m_register_media_controller(dev->stateful_enc.m2m_dev,
2130 						 &dev->stateful_enc.vfd,
2131 						 MEDIA_ENT_F_PROC_VIDEO_ENCODER);
2132 	if (ret) {
2133 		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for enc\n");
2134 		goto unreg_m2m;
2135 	}
2136 
2137 	ret = v4l2_m2m_register_media_controller(dev->stateful_dec.m2m_dev,
2138 						 &dev->stateful_dec.vfd,
2139 						 MEDIA_ENT_F_PROC_VIDEO_DECODER);
2140 	if (ret) {
2141 		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for dec\n");
2142 		goto unreg_m2m_sf_enc_mc;
2143 	}
2144 
2145 	ret = v4l2_m2m_register_media_controller(dev->stateless_dec.m2m_dev,
2146 						 &dev->stateless_dec.vfd,
2147 						 MEDIA_ENT_F_PROC_VIDEO_DECODER);
2148 	if (ret) {
2149 		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for stateless dec\n");
2150 		goto unreg_m2m_sf_dec_mc;
2151 	}
2152 
2153 	ret = media_device_register(&dev->mdev);
2154 	if (ret) {
2155 		v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
2156 		goto unreg_m2m_sl_dec_mc;
2157 	}
2158 #endif
2159 	return 0;
2160 
2161 #ifdef CONFIG_MEDIA_CONTROLLER
2162 unreg_m2m_sl_dec_mc:
2163 	v4l2_m2m_unregister_media_controller(dev->stateless_dec.m2m_dev);
2164 unreg_m2m_sf_dec_mc:
2165 	v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
2166 unreg_m2m_sf_enc_mc:
2167 	v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
2168 unreg_m2m:
2169 	video_unregister_device(&dev->stateless_dec.vfd);
2170 	v4l2_m2m_release(dev->stateless_dec.m2m_dev);
2171 #endif
2172 unreg_sf_dec:
2173 	video_unregister_device(&dev->stateful_dec.vfd);
2174 	v4l2_m2m_release(dev->stateful_dec.m2m_dev);
2175 unreg_sf_enc:
2176 	video_unregister_device(&dev->stateful_enc.vfd);
2177 	v4l2_m2m_release(dev->stateful_enc.m2m_dev);
2178 unreg_dev:
2179 	v4l2_device_unregister(&dev->v4l2_dev);
2180 free_dev:
2181 	kfree(dev);
2182 
2183 	return ret;
2184 }
2185 
vicodec_remove(struct platform_device * pdev)2186 static int vicodec_remove(struct platform_device *pdev)
2187 {
2188 	struct vicodec_dev *dev = platform_get_drvdata(pdev);
2189 
2190 	v4l2_info(&dev->v4l2_dev, "Removing " VICODEC_NAME);
2191 
2192 #ifdef CONFIG_MEDIA_CONTROLLER
2193 	media_device_unregister(&dev->mdev);
2194 	v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
2195 	v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
2196 	v4l2_m2m_unregister_media_controller(dev->stateless_dec.m2m_dev);
2197 #endif
2198 
2199 	video_unregister_device(&dev->stateful_enc.vfd);
2200 	video_unregister_device(&dev->stateful_dec.vfd);
2201 	video_unregister_device(&dev->stateless_dec.vfd);
2202 	v4l2_device_put(&dev->v4l2_dev);
2203 
2204 	return 0;
2205 }
2206 
2207 static struct platform_driver vicodec_pdrv = {
2208 	.probe		= vicodec_probe,
2209 	.remove		= vicodec_remove,
2210 	.driver		= {
2211 		.name	= VICODEC_NAME,
2212 	},
2213 };
2214 
vicodec_exit(void)2215 static void __exit vicodec_exit(void)
2216 {
2217 	platform_driver_unregister(&vicodec_pdrv);
2218 	platform_device_unregister(&vicodec_pdev);
2219 }
2220 
vicodec_init(void)2221 static int __init vicodec_init(void)
2222 {
2223 	int ret;
2224 
2225 	ret = platform_device_register(&vicodec_pdev);
2226 	if (ret)
2227 		return ret;
2228 
2229 	ret = platform_driver_register(&vicodec_pdrv);
2230 	if (ret)
2231 		platform_device_unregister(&vicodec_pdev);
2232 
2233 	return ret;
2234 }
2235 
2236 module_init(vicodec_init);
2237 module_exit(vicodec_exit);
2238