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fc96d58c SA |
1 | /* |
2 | * TI OMAP4 ISS V4L2 Driver - Generic video node | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments, Inc. | |
5 | * | |
6 | * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <asm/cacheflush.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/pagemap.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/module.h> | |
22 | #include <media/v4l2-dev.h> | |
23 | #include <media/v4l2-ioctl.h> | |
24 | ||
25 | #include "iss_video.h" | |
26 | #include "iss.h" | |
27 | ||
28 | ||
29 | /* ----------------------------------------------------------------------------- | |
30 | * Helper functions | |
31 | */ | |
32 | ||
33 | static struct iss_format_info formats[] = { | |
34 | { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, | |
35 | V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, | |
36 | V4L2_PIX_FMT_GREY, 8, }, | |
37 | { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10, | |
38 | V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8, | |
39 | V4L2_PIX_FMT_Y10, 10, }, | |
40 | { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10, | |
41 | V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8, | |
42 | V4L2_PIX_FMT_Y12, 12, }, | |
43 | { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, | |
44 | V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, | |
45 | V4L2_PIX_FMT_SBGGR8, 8, }, | |
46 | { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, | |
47 | V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, | |
48 | V4L2_PIX_FMT_SGBRG8, 8, }, | |
49 | { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, | |
50 | V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, | |
51 | V4L2_PIX_FMT_SGRBG8, 8, }, | |
52 | { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, | |
53 | V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, | |
54 | V4L2_PIX_FMT_SRGGB8, 8, }, | |
55 | { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, | |
56 | V4L2_MBUS_FMT_SGRBG10_1X10, 0, | |
57 | V4L2_PIX_FMT_SGRBG10DPCM8, 8, }, | |
58 | { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10, | |
59 | V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8, | |
60 | V4L2_PIX_FMT_SBGGR10, 10, }, | |
61 | { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10, | |
62 | V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8, | |
63 | V4L2_PIX_FMT_SGBRG10, 10, }, | |
64 | { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10, | |
65 | V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8, | |
66 | V4L2_PIX_FMT_SGRBG10, 10, }, | |
67 | { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10, | |
68 | V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8, | |
69 | V4L2_PIX_FMT_SRGGB10, 10, }, | |
70 | { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10, | |
71 | V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8, | |
72 | V4L2_PIX_FMT_SBGGR12, 12, }, | |
73 | { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10, | |
74 | V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8, | |
75 | V4L2_PIX_FMT_SGBRG12, 12, }, | |
76 | { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10, | |
77 | V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8, | |
78 | V4L2_PIX_FMT_SGRBG12, 12, }, | |
79 | { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10, | |
80 | V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8, | |
81 | V4L2_PIX_FMT_SRGGB12, 12, }, | |
82 | { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16, | |
83 | V4L2_MBUS_FMT_UYVY8_1X16, 0, | |
84 | V4L2_PIX_FMT_UYVY, 16, }, | |
85 | { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16, | |
86 | V4L2_MBUS_FMT_YUYV8_1X16, 0, | |
87 | V4L2_PIX_FMT_YUYV, 16, }, | |
88 | { V4L2_MBUS_FMT_YUYV8_1_5X8, V4L2_MBUS_FMT_YUYV8_1_5X8, | |
89 | V4L2_MBUS_FMT_YUYV8_1_5X8, 0, | |
90 | V4L2_PIX_FMT_NV12, 8, }, | |
91 | }; | |
92 | ||
93 | const struct iss_format_info * | |
94 | omap4iss_video_format_info(enum v4l2_mbus_pixelcode code) | |
95 | { | |
96 | unsigned int i; | |
97 | ||
98 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
99 | if (formats[i].code == code) | |
100 | return &formats[i]; | |
101 | } | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
106 | /* | |
107 | * iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format | |
108 | * @video: ISS video instance | |
109 | * @mbus: v4l2_mbus_framefmt format (input) | |
110 | * @pix: v4l2_pix_format format (output) | |
111 | * | |
112 | * Fill the output pix structure with information from the input mbus format. | |
113 | * The bytesperline and sizeimage fields are computed from the requested bytes | |
114 | * per line value in the pix format and information from the video instance. | |
115 | * | |
116 | * Return the number of padding bytes at end of line. | |
117 | */ | |
118 | static unsigned int iss_video_mbus_to_pix(const struct iss_video *video, | |
119 | const struct v4l2_mbus_framefmt *mbus, | |
120 | struct v4l2_pix_format *pix) | |
121 | { | |
122 | unsigned int bpl = pix->bytesperline; | |
123 | unsigned int min_bpl; | |
124 | unsigned int i; | |
125 | ||
126 | memset(pix, 0, sizeof(*pix)); | |
127 | pix->width = mbus->width; | |
128 | pix->height = mbus->height; | |
129 | ||
130 | /* Skip the last format in the loop so that it will be selected if no | |
131 | * match is found. | |
132 | */ | |
133 | for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { | |
134 | if (formats[i].code == mbus->code) | |
135 | break; | |
136 | } | |
137 | ||
138 | min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8; | |
139 | ||
140 | /* Clamp the requested bytes per line value. If the maximum bytes per | |
141 | * line value is zero, the module doesn't support user configurable line | |
142 | * sizes. Override the requested value with the minimum in that case. | |
143 | */ | |
144 | if (video->bpl_max) | |
145 | bpl = clamp(bpl, min_bpl, video->bpl_max); | |
146 | else | |
147 | bpl = min_bpl; | |
148 | ||
149 | if (!video->bpl_zero_padding || bpl != min_bpl) | |
150 | bpl = ALIGN(bpl, video->bpl_alignment); | |
151 | ||
152 | pix->pixelformat = formats[i].pixelformat; | |
153 | pix->bytesperline = bpl; | |
154 | pix->sizeimage = pix->bytesperline * pix->height; | |
155 | pix->colorspace = mbus->colorspace; | |
156 | pix->field = mbus->field; | |
157 | ||
158 | /* FIXME: Special case for NV12! We should make this nicer... */ | |
159 | if (pix->pixelformat == V4L2_PIX_FMT_NV12) | |
160 | pix->sizeimage += (pix->bytesperline * pix->height) / 2; | |
161 | ||
162 | return bpl - min_bpl; | |
163 | } | |
164 | ||
165 | static void iss_video_pix_to_mbus(const struct v4l2_pix_format *pix, | |
166 | struct v4l2_mbus_framefmt *mbus) | |
167 | { | |
168 | unsigned int i; | |
169 | ||
170 | memset(mbus, 0, sizeof(*mbus)); | |
171 | mbus->width = pix->width; | |
172 | mbus->height = pix->height; | |
173 | ||
174 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
175 | if (formats[i].pixelformat == pix->pixelformat) | |
176 | break; | |
177 | } | |
178 | ||
179 | if (WARN_ON(i == ARRAY_SIZE(formats))) | |
180 | return; | |
181 | ||
182 | mbus->code = formats[i].code; | |
183 | mbus->colorspace = pix->colorspace; | |
184 | mbus->field = pix->field; | |
185 | } | |
186 | ||
187 | static struct v4l2_subdev * | |
188 | iss_video_remote_subdev(struct iss_video *video, u32 *pad) | |
189 | { | |
190 | struct media_pad *remote; | |
191 | ||
192 | remote = media_entity_remote_pad(&video->pad); | |
193 | ||
194 | if (remote == NULL || | |
195 | media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV) | |
196 | return NULL; | |
197 | ||
198 | if (pad) | |
199 | *pad = remote->index; | |
200 | ||
201 | return media_entity_to_v4l2_subdev(remote->entity); | |
202 | } | |
203 | ||
204 | /* Return a pointer to the ISS video instance at the far end of the pipeline. */ | |
205 | static struct iss_video * | |
206 | iss_video_far_end(struct iss_video *video) | |
207 | { | |
208 | struct media_entity_graph graph; | |
209 | struct media_entity *entity = &video->video.entity; | |
210 | struct media_device *mdev = entity->parent; | |
211 | struct iss_video *far_end = NULL; | |
212 | ||
213 | mutex_lock(&mdev->graph_mutex); | |
214 | media_entity_graph_walk_start(&graph, entity); | |
215 | ||
216 | while ((entity = media_entity_graph_walk_next(&graph))) { | |
217 | if (entity == &video->video.entity) | |
218 | continue; | |
219 | ||
220 | if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) | |
221 | continue; | |
222 | ||
223 | far_end = to_iss_video(media_entity_to_video_device(entity)); | |
224 | if (far_end->type != video->type) | |
225 | break; | |
226 | ||
227 | far_end = NULL; | |
228 | } | |
229 | ||
230 | mutex_unlock(&mdev->graph_mutex); | |
231 | return far_end; | |
232 | } | |
233 | ||
234 | static int | |
235 | __iss_video_get_format(struct iss_video *video, struct v4l2_format *format) | |
236 | { | |
237 | struct v4l2_subdev_format fmt; | |
238 | struct v4l2_subdev *subdev; | |
239 | u32 pad; | |
240 | int ret; | |
241 | ||
242 | subdev = iss_video_remote_subdev(video, &pad); | |
243 | if (subdev == NULL) | |
244 | return -EINVAL; | |
245 | ||
246 | mutex_lock(&video->mutex); | |
247 | ||
248 | fmt.pad = pad; | |
249 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
250 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
251 | if (ret == -ENOIOCTLCMD) | |
252 | ret = -EINVAL; | |
253 | ||
254 | mutex_unlock(&video->mutex); | |
255 | ||
256 | if (ret) | |
257 | return ret; | |
258 | ||
259 | format->type = video->type; | |
260 | return iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); | |
261 | } | |
262 | ||
263 | static int | |
264 | iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh) | |
265 | { | |
266 | struct v4l2_format format; | |
267 | int ret; | |
268 | ||
269 | memcpy(&format, &vfh->format, sizeof(format)); | |
270 | ret = __iss_video_get_format(video, &format); | |
271 | if (ret < 0) | |
272 | return ret; | |
273 | ||
274 | if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat || | |
275 | vfh->format.fmt.pix.height != format.fmt.pix.height || | |
276 | vfh->format.fmt.pix.width != format.fmt.pix.width || | |
277 | vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline || | |
278 | vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage) | |
279 | return -EINVAL; | |
280 | ||
281 | return ret; | |
282 | } | |
283 | ||
284 | /* ----------------------------------------------------------------------------- | |
285 | * Video queue operations | |
286 | */ | |
287 | ||
288 | static int iss_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, | |
289 | unsigned int *count, unsigned int *num_planes, | |
290 | unsigned int sizes[], void *alloc_ctxs[]) | |
291 | { | |
292 | struct iss_video_fh *vfh = vb2_get_drv_priv(vq); | |
293 | struct iss_video *video = vfh->video; | |
294 | ||
295 | /* Revisit multi-planar support for NV12 */ | |
296 | *num_planes = 1; | |
297 | ||
298 | sizes[0] = vfh->format.fmt.pix.sizeimage; | |
299 | if (sizes[0] == 0) | |
300 | return -EINVAL; | |
301 | ||
302 | alloc_ctxs[0] = video->alloc_ctx; | |
303 | ||
304 | *count = min(*count, (unsigned int)(video->capture_mem / PAGE_ALIGN(sizes[0]))); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | static void iss_video_buf_cleanup(struct vb2_buffer *vb) | |
310 | { | |
311 | struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb); | |
312 | ||
313 | if (buffer->iss_addr) | |
314 | buffer->iss_addr = 0; | |
315 | } | |
316 | ||
317 | static int iss_video_buf_prepare(struct vb2_buffer *vb) | |
318 | { | |
319 | struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); | |
320 | struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb); | |
321 | struct iss_video *video = vfh->video; | |
322 | unsigned long size = vfh->format.fmt.pix.sizeimage; | |
323 | dma_addr_t addr; | |
324 | ||
325 | if (vb2_plane_size(vb, 0) < size) | |
326 | return -ENOBUFS; | |
327 | ||
328 | addr = vb2_dma_contig_plane_dma_addr(vb, 0); | |
329 | if (!IS_ALIGNED(addr, 32)) { | |
330 | dev_dbg(video->iss->dev, "Buffer address must be " | |
331 | "aligned to 32 bytes boundary.\n"); | |
332 | return -EINVAL; | |
333 | } | |
334 | ||
335 | vb2_set_plane_payload(vb, 0, size); | |
336 | buffer->iss_addr = addr; | |
337 | return 0; | |
338 | } | |
339 | ||
340 | static void iss_video_buf_queue(struct vb2_buffer *vb) | |
341 | { | |
342 | struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); | |
343 | struct iss_video *video = vfh->video; | |
344 | struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb); | |
345 | struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); | |
346 | unsigned int empty; | |
347 | unsigned long flags; | |
348 | ||
349 | spin_lock_irqsave(&video->qlock, flags); | |
350 | empty = list_empty(&video->dmaqueue); | |
351 | list_add_tail(&buffer->list, &video->dmaqueue); | |
352 | spin_unlock_irqrestore(&video->qlock, flags); | |
353 | ||
354 | if (empty) { | |
355 | enum iss_pipeline_state state; | |
356 | unsigned int start; | |
357 | ||
358 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
359 | state = ISS_PIPELINE_QUEUE_OUTPUT; | |
360 | else | |
361 | state = ISS_PIPELINE_QUEUE_INPUT; | |
362 | ||
363 | spin_lock_irqsave(&pipe->lock, flags); | |
364 | pipe->state |= state; | |
365 | video->ops->queue(video, buffer); | |
366 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED; | |
367 | ||
368 | start = iss_pipeline_ready(pipe); | |
369 | if (start) | |
370 | pipe->state |= ISS_PIPELINE_STREAM; | |
371 | spin_unlock_irqrestore(&pipe->lock, flags); | |
372 | ||
373 | if (start) | |
374 | omap4iss_pipeline_set_stream(pipe, | |
375 | ISS_PIPELINE_STREAM_SINGLESHOT); | |
376 | } | |
377 | } | |
378 | ||
379 | static struct vb2_ops iss_video_vb2ops = { | |
380 | .queue_setup = iss_video_queue_setup, | |
381 | .buf_prepare = iss_video_buf_prepare, | |
382 | .buf_queue = iss_video_buf_queue, | |
383 | .buf_cleanup = iss_video_buf_cleanup, | |
384 | }; | |
385 | ||
386 | /* | |
387 | * omap4iss_video_buffer_next - Complete the current buffer and return the next | |
388 | * @video: ISS video object | |
389 | * | |
390 | * Remove the current video buffer from the DMA queue and fill its timestamp, | |
391 | * field count and state fields before waking up its completion handler. | |
392 | * | |
393 | * For capture video nodes, the buffer state is set to VB2_BUF_STATE_DONE if no | |
394 | * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise. | |
395 | * | |
396 | * The DMA queue is expected to contain at least one buffer. | |
397 | * | |
398 | * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is | |
399 | * empty. | |
400 | */ | |
401 | struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video) | |
402 | { | |
403 | struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); | |
404 | enum iss_pipeline_state state; | |
405 | struct iss_buffer *buf; | |
406 | unsigned long flags; | |
407 | struct timespec ts; | |
408 | ||
409 | spin_lock_irqsave(&video->qlock, flags); | |
410 | if (WARN_ON(list_empty(&video->dmaqueue))) { | |
411 | spin_unlock_irqrestore(&video->qlock, flags); | |
412 | return NULL; | |
413 | } | |
414 | ||
415 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, | |
416 | list); | |
417 | list_del(&buf->list); | |
418 | spin_unlock_irqrestore(&video->qlock, flags); | |
419 | ||
420 | ktime_get_ts(&ts); | |
421 | buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec; | |
422 | buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
423 | ||
424 | /* Do frame number propagation only if this is the output video node. | |
425 | * Frame number either comes from the CSI receivers or it gets | |
426 | * incremented here if H3A is not active. | |
427 | * Note: There is no guarantee that the output buffer will finish | |
428 | * first, so the input number might lag behind by 1 in some cases. | |
429 | */ | |
430 | if (video == pipe->output && !pipe->do_propagation) | |
431 | buf->vb.v4l2_buf.sequence = atomic_inc_return(&pipe->frame_number); | |
432 | else | |
433 | buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number); | |
434 | ||
435 | vb2_buffer_done(&buf->vb, pipe->error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); | |
436 | pipe->error = false; | |
437 | ||
438 | spin_lock_irqsave(&video->qlock, flags); | |
439 | if (list_empty(&video->dmaqueue)) { | |
440 | spin_unlock_irqrestore(&video->qlock, flags); | |
441 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
442 | state = ISS_PIPELINE_QUEUE_OUTPUT | |
443 | | ISS_PIPELINE_STREAM; | |
444 | else | |
445 | state = ISS_PIPELINE_QUEUE_INPUT | |
446 | | ISS_PIPELINE_STREAM; | |
447 | ||
448 | spin_lock_irqsave(&pipe->lock, flags); | |
449 | pipe->state &= ~state; | |
450 | if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS) | |
451 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; | |
452 | spin_unlock_irqrestore(&pipe->lock, flags); | |
453 | return NULL; | |
454 | } | |
455 | ||
456 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { | |
457 | spin_lock_irqsave(&pipe->lock, flags); | |
458 | pipe->state &= ~ISS_PIPELINE_STREAM; | |
459 | spin_unlock_irqrestore(&pipe->lock, flags); | |
460 | } | |
461 | ||
462 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, | |
463 | list); | |
464 | spin_unlock_irqrestore(&video->qlock, flags); | |
465 | buf->vb.state = VB2_BUF_STATE_ACTIVE; | |
466 | return buf; | |
467 | } | |
468 | ||
469 | /* ----------------------------------------------------------------------------- | |
470 | * V4L2 ioctls | |
471 | */ | |
472 | ||
473 | static int | |
474 | iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) | |
475 | { | |
476 | struct iss_video *video = video_drvdata(file); | |
477 | ||
478 | strlcpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver)); | |
479 | strlcpy(cap->card, video->video.name, sizeof(cap->card)); | |
480 | strlcpy(cap->bus_info, "media", sizeof(cap->bus_info)); | |
481 | ||
482 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
483 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
484 | else | |
485 | cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
490 | static int | |
491 | iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format) | |
492 | { | |
493 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
494 | struct iss_video *video = video_drvdata(file); | |
495 | ||
496 | if (format->type != video->type) | |
497 | return -EINVAL; | |
498 | ||
499 | mutex_lock(&video->mutex); | |
500 | *format = vfh->format; | |
501 | mutex_unlock(&video->mutex); | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | static int | |
507 | iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format) | |
508 | { | |
509 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
510 | struct iss_video *video = video_drvdata(file); | |
511 | struct v4l2_mbus_framefmt fmt; | |
512 | ||
513 | if (format->type != video->type) | |
514 | return -EINVAL; | |
515 | ||
516 | mutex_lock(&video->mutex); | |
517 | ||
518 | /* Fill the bytesperline and sizeimage fields by converting to media bus | |
519 | * format and back to pixel format. | |
520 | */ | |
521 | iss_video_pix_to_mbus(&format->fmt.pix, &fmt); | |
522 | iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix); | |
523 | ||
524 | vfh->format = *format; | |
525 | ||
526 | mutex_unlock(&video->mutex); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | static int | |
531 | iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format) | |
532 | { | |
533 | struct iss_video *video = video_drvdata(file); | |
534 | struct v4l2_subdev_format fmt; | |
535 | struct v4l2_subdev *subdev; | |
536 | u32 pad; | |
537 | int ret; | |
538 | ||
539 | if (format->type != video->type) | |
540 | return -EINVAL; | |
541 | ||
542 | subdev = iss_video_remote_subdev(video, &pad); | |
543 | if (subdev == NULL) | |
544 | return -EINVAL; | |
545 | ||
546 | iss_video_pix_to_mbus(&format->fmt.pix, &fmt.format); | |
547 | ||
548 | fmt.pad = pad; | |
549 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
550 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
551 | if (ret) | |
552 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
553 | ||
554 | iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | static int | |
559 | iss_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap) | |
560 | { | |
561 | struct iss_video *video = video_drvdata(file); | |
562 | struct v4l2_subdev *subdev; | |
563 | int ret; | |
564 | ||
565 | subdev = iss_video_remote_subdev(video, NULL); | |
566 | if (subdev == NULL) | |
567 | return -EINVAL; | |
568 | ||
569 | mutex_lock(&video->mutex); | |
570 | ret = v4l2_subdev_call(subdev, video, cropcap, cropcap); | |
571 | mutex_unlock(&video->mutex); | |
572 | ||
573 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
574 | } | |
575 | ||
576 | static int | |
577 | iss_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop) | |
578 | { | |
579 | struct iss_video *video = video_drvdata(file); | |
580 | struct v4l2_subdev_format format; | |
581 | struct v4l2_subdev *subdev; | |
582 | u32 pad; | |
583 | int ret; | |
584 | ||
585 | subdev = iss_video_remote_subdev(video, &pad); | |
586 | if (subdev == NULL) | |
587 | return -EINVAL; | |
588 | ||
589 | /* Try the get crop operation first and fallback to get format if not | |
590 | * implemented. | |
591 | */ | |
592 | ret = v4l2_subdev_call(subdev, video, g_crop, crop); | |
593 | if (ret != -ENOIOCTLCMD) | |
594 | return ret; | |
595 | ||
596 | format.pad = pad; | |
597 | format.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
598 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format); | |
599 | if (ret < 0) | |
600 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
601 | ||
602 | crop->c.left = 0; | |
603 | crop->c.top = 0; | |
604 | crop->c.width = format.format.width; | |
605 | crop->c.height = format.format.height; | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
610 | static int | |
611 | iss_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop) | |
612 | { | |
613 | struct iss_video *video = video_drvdata(file); | |
614 | struct v4l2_subdev *subdev; | |
615 | int ret; | |
616 | ||
617 | subdev = iss_video_remote_subdev(video, NULL); | |
618 | if (subdev == NULL) | |
619 | return -EINVAL; | |
620 | ||
621 | mutex_lock(&video->mutex); | |
622 | ret = v4l2_subdev_call(subdev, video, s_crop, crop); | |
623 | mutex_unlock(&video->mutex); | |
624 | ||
625 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
626 | } | |
627 | ||
628 | static int | |
629 | iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
630 | { | |
631 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
632 | struct iss_video *video = video_drvdata(file); | |
633 | ||
634 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
635 | video->type != a->type) | |
636 | return -EINVAL; | |
637 | ||
638 | memset(a, 0, sizeof(*a)); | |
639 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
640 | a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; | |
641 | a->parm.output.timeperframe = vfh->timeperframe; | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | static int | |
647 | iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
648 | { | |
649 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
650 | struct iss_video *video = video_drvdata(file); | |
651 | ||
652 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
653 | video->type != a->type) | |
654 | return -EINVAL; | |
655 | ||
656 | if (a->parm.output.timeperframe.denominator == 0) | |
657 | a->parm.output.timeperframe.denominator = 1; | |
658 | ||
659 | vfh->timeperframe = a->parm.output.timeperframe; | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static int | |
665 | iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) | |
666 | { | |
667 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
668 | ||
669 | return vb2_reqbufs(&vfh->queue, rb); | |
670 | } | |
671 | ||
672 | static int | |
673 | iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
674 | { | |
675 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
676 | ||
677 | return vb2_querybuf(&vfh->queue, b); | |
678 | } | |
679 | ||
680 | static int | |
681 | iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
682 | { | |
683 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
684 | ||
685 | return vb2_qbuf(&vfh->queue, b); | |
686 | } | |
687 | ||
688 | static int | |
689 | iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
690 | { | |
691 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
692 | ||
693 | return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK); | |
694 | } | |
695 | ||
696 | /* | |
697 | * Stream management | |
698 | * | |
699 | * Every ISS pipeline has a single input and a single output. The input can be | |
700 | * either a sensor or a video node. The output is always a video node. | |
701 | * | |
702 | * As every pipeline has an output video node, the ISS video objects at the | |
703 | * pipeline output stores the pipeline state. It tracks the streaming state of | |
704 | * both the input and output, as well as the availability of buffers. | |
705 | * | |
706 | * In sensor-to-memory mode, frames are always available at the pipeline input. | |
707 | * Starting the sensor usually requires I2C transfers and must be done in | |
708 | * interruptible context. The pipeline is started and stopped synchronously | |
709 | * to the stream on/off commands. All modules in the pipeline will get their | |
710 | * subdev set stream handler called. The module at the end of the pipeline must | |
711 | * delay starting the hardware until buffers are available at its output. | |
712 | * | |
713 | * In memory-to-memory mode, starting/stopping the stream requires | |
714 | * synchronization between the input and output. ISS modules can't be stopped | |
715 | * in the middle of a frame, and at least some of the modules seem to become | |
716 | * busy as soon as they're started, even if they don't receive a frame start | |
717 | * event. For that reason frames need to be processed in single-shot mode. The | |
718 | * driver needs to wait until a frame is completely processed and written to | |
719 | * memory before restarting the pipeline for the next frame. Pipelined | |
720 | * processing might be possible but requires more testing. | |
721 | * | |
722 | * Stream start must be delayed until buffers are available at both the input | |
723 | * and output. The pipeline must be started in the videobuf queue callback with | |
724 | * the buffers queue spinlock held. The modules subdev set stream operation must | |
725 | * not sleep. | |
726 | */ | |
727 | static int | |
728 | iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) | |
729 | { | |
730 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
731 | struct iss_video *video = video_drvdata(file); | |
732 | enum iss_pipeline_state state; | |
733 | struct iss_pipeline *pipe; | |
734 | struct iss_video *far_end; | |
735 | unsigned long flags; | |
736 | int ret; | |
737 | ||
738 | if (type != video->type) | |
739 | return -EINVAL; | |
740 | ||
741 | mutex_lock(&video->stream_lock); | |
742 | ||
743 | if (video->streaming) { | |
744 | mutex_unlock(&video->stream_lock); | |
745 | return -EBUSY; | |
746 | } | |
747 | ||
748 | /* Start streaming on the pipeline. No link touching an entity in the | |
749 | * pipeline can be activated or deactivated once streaming is started. | |
750 | */ | |
751 | pipe = video->video.entity.pipe | |
752 | ? to_iss_pipeline(&video->video.entity) : &video->pipe; | |
753 | pipe->external = NULL; | |
754 | pipe->external_rate = 0; | |
755 | pipe->external_bpp = 0; | |
756 | ||
757 | if (video->iss->pdata->set_constraints) | |
758 | video->iss->pdata->set_constraints(video->iss, true); | |
759 | ||
760 | ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe); | |
761 | if (ret < 0) | |
762 | goto err_media_entity_pipeline_start; | |
763 | ||
764 | /* Verify that the currently configured format matches the output of | |
765 | * the connected subdev. | |
766 | */ | |
767 | ret = iss_video_check_format(video, vfh); | |
768 | if (ret < 0) | |
769 | goto err_iss_video_check_format; | |
770 | ||
771 | video->bpl_padding = ret; | |
772 | video->bpl_value = vfh->format.fmt.pix.bytesperline; | |
773 | ||
774 | /* Find the ISS video node connected at the far end of the pipeline and | |
775 | * update the pipeline. | |
776 | */ | |
777 | far_end = iss_video_far_end(video); | |
778 | ||
779 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
780 | state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT; | |
781 | pipe->input = far_end; | |
782 | pipe->output = video; | |
783 | } else { | |
784 | if (far_end == NULL) { | |
785 | ret = -EPIPE; | |
786 | goto err_iss_video_check_format; | |
787 | } | |
788 | ||
789 | state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT; | |
790 | pipe->input = video; | |
791 | pipe->output = far_end; | |
792 | } | |
793 | ||
794 | spin_lock_irqsave(&pipe->lock, flags); | |
795 | pipe->state &= ~ISS_PIPELINE_STREAM; | |
796 | pipe->state |= state; | |
797 | spin_unlock_irqrestore(&pipe->lock, flags); | |
798 | ||
799 | /* Set the maximum time per frame as the value requested by userspace. | |
800 | * This is a soft limit that can be overridden if the hardware doesn't | |
801 | * support the request limit. | |
802 | */ | |
803 | if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) | |
804 | pipe->max_timeperframe = vfh->timeperframe; | |
805 | ||
806 | video->queue = &vfh->queue; | |
807 | INIT_LIST_HEAD(&video->dmaqueue); | |
808 | spin_lock_init(&video->qlock); | |
809 | atomic_set(&pipe->frame_number, -1); | |
810 | ||
811 | ret = vb2_streamon(&vfh->queue, type); | |
812 | if (ret < 0) | |
813 | goto err_iss_video_check_format; | |
814 | ||
815 | /* In sensor-to-memory mode, the stream can be started synchronously | |
816 | * to the stream on command. In memory-to-memory mode, it will be | |
817 | * started when buffers are queued on both the input and output. | |
818 | */ | |
819 | if (pipe->input == NULL) { | |
820 | unsigned long flags; | |
821 | ret = omap4iss_pipeline_set_stream(pipe, | |
822 | ISS_PIPELINE_STREAM_CONTINUOUS); | |
823 | if (ret < 0) | |
824 | goto err_omap4iss_set_stream; | |
825 | spin_lock_irqsave(&video->qlock, flags); | |
826 | if (list_empty(&video->dmaqueue)) | |
827 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; | |
828 | spin_unlock_irqrestore(&video->qlock, flags); | |
829 | } | |
830 | ||
831 | if (ret < 0) { | |
832 | err_omap4iss_set_stream: | |
833 | vb2_streamoff(&vfh->queue, type); | |
834 | err_iss_video_check_format: | |
835 | media_entity_pipeline_stop(&video->video.entity); | |
836 | err_media_entity_pipeline_start: | |
837 | if (video->iss->pdata->set_constraints) | |
838 | video->iss->pdata->set_constraints(video->iss, false); | |
839 | video->queue = NULL; | |
840 | } | |
841 | ||
842 | if (!ret) | |
843 | video->streaming = 1; | |
844 | ||
845 | mutex_unlock(&video->stream_lock); | |
846 | return ret; | |
847 | } | |
848 | ||
849 | static int | |
850 | iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) | |
851 | { | |
852 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
853 | struct iss_video *video = video_drvdata(file); | |
854 | struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); | |
855 | enum iss_pipeline_state state; | |
856 | unsigned long flags; | |
857 | ||
858 | if (type != video->type) | |
859 | return -EINVAL; | |
860 | ||
861 | mutex_lock(&video->stream_lock); | |
862 | ||
863 | if (!vb2_is_streaming(&vfh->queue)) | |
864 | goto done; | |
865 | ||
866 | /* Update the pipeline state. */ | |
867 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
868 | state = ISS_PIPELINE_STREAM_OUTPUT | |
869 | | ISS_PIPELINE_QUEUE_OUTPUT; | |
870 | else | |
871 | state = ISS_PIPELINE_STREAM_INPUT | |
872 | | ISS_PIPELINE_QUEUE_INPUT; | |
873 | ||
874 | spin_lock_irqsave(&pipe->lock, flags); | |
875 | pipe->state &= ~state; | |
876 | spin_unlock_irqrestore(&pipe->lock, flags); | |
877 | ||
878 | /* Stop the stream. */ | |
879 | omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED); | |
880 | vb2_streamoff(&vfh->queue, type); | |
881 | video->queue = NULL; | |
882 | video->streaming = 0; | |
883 | ||
884 | if (video->iss->pdata->set_constraints) | |
885 | video->iss->pdata->set_constraints(video->iss, false); | |
886 | media_entity_pipeline_stop(&video->video.entity); | |
887 | ||
888 | done: | |
889 | mutex_unlock(&video->stream_lock); | |
890 | return 0; | |
891 | } | |
892 | ||
893 | static int | |
894 | iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) | |
895 | { | |
896 | if (input->index > 0) | |
897 | return -EINVAL; | |
898 | ||
899 | strlcpy(input->name, "camera", sizeof(input->name)); | |
900 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | static int | |
906 | iss_video_g_input(struct file *file, void *fh, unsigned int *input) | |
907 | { | |
908 | *input = 0; | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
913 | static const struct v4l2_ioctl_ops iss_video_ioctl_ops = { | |
914 | .vidioc_querycap = iss_video_querycap, | |
915 | .vidioc_g_fmt_vid_cap = iss_video_get_format, | |
916 | .vidioc_s_fmt_vid_cap = iss_video_set_format, | |
917 | .vidioc_try_fmt_vid_cap = iss_video_try_format, | |
918 | .vidioc_g_fmt_vid_out = iss_video_get_format, | |
919 | .vidioc_s_fmt_vid_out = iss_video_set_format, | |
920 | .vidioc_try_fmt_vid_out = iss_video_try_format, | |
921 | .vidioc_cropcap = iss_video_cropcap, | |
922 | .vidioc_g_crop = iss_video_get_crop, | |
923 | .vidioc_s_crop = iss_video_set_crop, | |
924 | .vidioc_g_parm = iss_video_get_param, | |
925 | .vidioc_s_parm = iss_video_set_param, | |
926 | .vidioc_reqbufs = iss_video_reqbufs, | |
927 | .vidioc_querybuf = iss_video_querybuf, | |
928 | .vidioc_qbuf = iss_video_qbuf, | |
929 | .vidioc_dqbuf = iss_video_dqbuf, | |
930 | .vidioc_streamon = iss_video_streamon, | |
931 | .vidioc_streamoff = iss_video_streamoff, | |
932 | .vidioc_enum_input = iss_video_enum_input, | |
933 | .vidioc_g_input = iss_video_g_input, | |
934 | }; | |
935 | ||
936 | /* ----------------------------------------------------------------------------- | |
937 | * V4L2 file operations | |
938 | */ | |
939 | ||
940 | static int iss_video_open(struct file *file) | |
941 | { | |
942 | struct iss_video *video = video_drvdata(file); | |
943 | struct iss_video_fh *handle; | |
944 | struct vb2_queue *q; | |
945 | int ret = 0; | |
946 | ||
947 | handle = kzalloc(sizeof(*handle), GFP_KERNEL); | |
948 | if (handle == NULL) | |
949 | return -ENOMEM; | |
950 | ||
951 | v4l2_fh_init(&handle->vfh, &video->video); | |
952 | v4l2_fh_add(&handle->vfh); | |
953 | ||
954 | /* If this is the first user, initialise the pipeline. */ | |
955 | if (omap4iss_get(video->iss) == NULL) { | |
956 | ret = -EBUSY; | |
957 | goto done; | |
958 | } | |
959 | ||
960 | ret = omap4iss_pipeline_pm_use(&video->video.entity, 1); | |
961 | if (ret < 0) { | |
962 | omap4iss_put(video->iss); | |
963 | goto done; | |
964 | } | |
965 | ||
966 | video->alloc_ctx = vb2_dma_contig_init_ctx(video->iss->dev); | |
967 | if (IS_ERR(video->alloc_ctx)) { | |
968 | ret = PTR_ERR(video->alloc_ctx); | |
969 | omap4iss_put(video->iss); | |
970 | goto done; | |
971 | } | |
972 | ||
973 | q = &handle->queue; | |
974 | ||
975 | q->type = video->type; | |
976 | q->io_modes = VB2_MMAP; | |
977 | q->drv_priv = handle; | |
978 | q->ops = &iss_video_vb2ops; | |
979 | q->mem_ops = &vb2_dma_contig_memops; | |
980 | q->buf_struct_size = sizeof(struct iss_buffer); | |
981 | ||
982 | ret = vb2_queue_init(q); | |
983 | if (ret) { | |
984 | omap4iss_put(video->iss); | |
985 | goto done; | |
986 | } | |
987 | ||
988 | memset(&handle->format, 0, sizeof(handle->format)); | |
989 | handle->format.type = video->type; | |
990 | handle->timeperframe.denominator = 1; | |
991 | ||
992 | handle->video = video; | |
993 | file->private_data = &handle->vfh; | |
994 | ||
995 | done: | |
996 | if (ret < 0) { | |
997 | v4l2_fh_del(&handle->vfh); | |
998 | kfree(handle); | |
999 | } | |
1000 | ||
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | static int iss_video_release(struct file *file) | |
1005 | { | |
1006 | struct iss_video *video = video_drvdata(file); | |
1007 | struct v4l2_fh *vfh = file->private_data; | |
1008 | struct iss_video_fh *handle = to_iss_video_fh(vfh); | |
1009 | ||
1010 | /* Disable streaming and free the buffers queue resources. */ | |
1011 | iss_video_streamoff(file, vfh, video->type); | |
1012 | ||
1013 | omap4iss_pipeline_pm_use(&video->video.entity, 0); | |
1014 | ||
1015 | /* Release the videobuf2 queue */ | |
1016 | vb2_queue_release(&handle->queue); | |
1017 | ||
1018 | /* Release the file handle. */ | |
1019 | v4l2_fh_del(vfh); | |
1020 | kfree(handle); | |
1021 | file->private_data = NULL; | |
1022 | ||
1023 | omap4iss_put(video->iss); | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | static unsigned int iss_video_poll(struct file *file, poll_table *wait) | |
1029 | { | |
1030 | struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); | |
1031 | ||
1032 | return vb2_poll(&vfh->queue, file, wait); | |
1033 | } | |
1034 | ||
1035 | static int iss_video_mmap(struct file *file, struct vm_area_struct *vma) | |
1036 | { | |
1037 | struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); | |
1038 | ||
1039 | return vb2_mmap(&vfh->queue, vma);; | |
1040 | } | |
1041 | ||
1042 | static struct v4l2_file_operations iss_video_fops = { | |
1043 | .owner = THIS_MODULE, | |
1044 | .unlocked_ioctl = video_ioctl2, | |
1045 | .open = iss_video_open, | |
1046 | .release = iss_video_release, | |
1047 | .poll = iss_video_poll, | |
1048 | .mmap = iss_video_mmap, | |
1049 | }; | |
1050 | ||
1051 | /* ----------------------------------------------------------------------------- | |
1052 | * ISS video core | |
1053 | */ | |
1054 | ||
1055 | static const struct iss_video_operations iss_video_dummy_ops = { | |
1056 | }; | |
1057 | ||
1058 | int omap4iss_video_init(struct iss_video *video, const char *name) | |
1059 | { | |
1060 | const char *direction; | |
1061 | int ret; | |
1062 | ||
1063 | switch (video->type) { | |
1064 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
1065 | direction = "output"; | |
1066 | video->pad.flags = MEDIA_PAD_FL_SINK; | |
1067 | break; | |
1068 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: | |
1069 | direction = "input"; | |
1070 | video->pad.flags = MEDIA_PAD_FL_SOURCE; | |
1071 | break; | |
1072 | ||
1073 | default: | |
1074 | return -EINVAL; | |
1075 | } | |
1076 | ||
1077 | ret = media_entity_init(&video->video.entity, 1, &video->pad, 0); | |
1078 | if (ret < 0) | |
1079 | return ret; | |
1080 | ||
1081 | mutex_init(&video->mutex); | |
1082 | atomic_set(&video->active, 0); | |
1083 | ||
1084 | spin_lock_init(&video->pipe.lock); | |
1085 | mutex_init(&video->stream_lock); | |
1086 | ||
1087 | /* Initialize the video device. */ | |
1088 | if (video->ops == NULL) | |
1089 | video->ops = &iss_video_dummy_ops; | |
1090 | ||
1091 | video->video.fops = &iss_video_fops; | |
1092 | snprintf(video->video.name, sizeof(video->video.name), | |
1093 | "OMAP4 ISS %s %s", name, direction); | |
1094 | video->video.vfl_type = VFL_TYPE_GRABBER; | |
1095 | video->video.release = video_device_release_empty; | |
1096 | video->video.ioctl_ops = &iss_video_ioctl_ops; | |
1097 | video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED; | |
1098 | ||
1099 | video_set_drvdata(&video->video, video); | |
1100 | ||
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | void omap4iss_video_cleanup(struct iss_video *video) | |
1105 | { | |
1106 | media_entity_cleanup(&video->video.entity); | |
1107 | mutex_destroy(&video->stream_lock); | |
1108 | mutex_destroy(&video->mutex); | |
1109 | } | |
1110 | ||
1111 | int omap4iss_video_register(struct iss_video *video, struct v4l2_device *vdev) | |
1112 | { | |
1113 | int ret; | |
1114 | ||
1115 | video->video.v4l2_dev = vdev; | |
1116 | ||
1117 | ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); | |
1118 | if (ret < 0) | |
1119 | printk(KERN_ERR "%s: could not register video device (%d)\n", | |
1120 | __func__, ret); | |
1121 | ||
1122 | return ret; | |
1123 | } | |
1124 | ||
1125 | void omap4iss_video_unregister(struct iss_video *video) | |
1126 | { | |
1127 | if (video_is_registered(&video->video)) | |
1128 | video_unregister_device(&video->video); | |
1129 | } |