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Commit | Line | Data |
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ad614acb LP |
1 | /* |
2 | * ispvideo.c | |
3 | * | |
4 | * TI OMAP3 ISP - Generic video node | |
5 | * | |
6 | * Copyright (C) 2009-2010 Nokia Corporation | |
7 | * | |
8 | * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
9 | * Sakari Ailus <sakari.ailus@iki.fi> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
23 | * 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <asm/cacheflush.h> | |
27 | #include <linux/clk.h> | |
28 | #include <linux/mm.h> | |
025521f9 | 29 | #include <linux/module.h> |
ad614acb LP |
30 | #include <linux/pagemap.h> |
31 | #include <linux/scatterlist.h> | |
32 | #include <linux/sched.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/vmalloc.h> | |
35 | #include <media/v4l2-dev.h> | |
36 | #include <media/v4l2-ioctl.h> | |
ad614acb LP |
37 | |
38 | #include "ispvideo.h" | |
39 | #include "isp.h" | |
40 | ||
41 | ||
42 | /* ----------------------------------------------------------------------------- | |
43 | * Helper functions | |
44 | */ | |
45 | ||
8f4f298e SA |
46 | /* |
47 | * NOTE: When adding new media bus codes, always remember to add | |
48 | * corresponding in-memory formats to the table below!!! | |
49 | */ | |
ad614acb LP |
50 | static struct isp_format_info formats[] = { |
51 | { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, | |
c09af044 | 52 | V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, |
1697e49a | 53 | V4L2_PIX_FMT_GREY, 8, 1, }, |
5782f97b | 54 | { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10, |
c09af044 | 55 | V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8, |
1697e49a | 56 | V4L2_PIX_FMT_Y10, 10, 2, }, |
5782f97b | 57 | { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10, |
c09af044 | 58 | V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8, |
1697e49a | 59 | V4L2_PIX_FMT_Y12, 12, 2, }, |
5782f97b | 60 | { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, |
c09af044 | 61 | V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, |
1697e49a | 62 | V4L2_PIX_FMT_SBGGR8, 8, 1, }, |
5782f97b | 63 | { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, |
c09af044 | 64 | V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, |
1697e49a | 65 | V4L2_PIX_FMT_SGBRG8, 8, 1, }, |
5782f97b | 66 | { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, |
c09af044 | 67 | V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, |
1697e49a | 68 | V4L2_PIX_FMT_SGRBG8, 8, 1, }, |
5782f97b | 69 | { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, |
c09af044 | 70 | V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, |
1697e49a | 71 | V4L2_PIX_FMT_SRGGB8, 8, 1, }, |
8f4f298e SA |
72 | { V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, |
73 | V4L2_MBUS_FMT_SBGGR10_1X10, 0, | |
1697e49a | 74 | V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, }, |
8f4f298e SA |
75 | { V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, |
76 | V4L2_MBUS_FMT_SGBRG10_1X10, 0, | |
1697e49a | 77 | V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, }, |
ad614acb | 78 | { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, |
c09af044 | 79 | V4L2_MBUS_FMT_SGRBG10_1X10, 0, |
1697e49a | 80 | V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, }, |
8f4f298e SA |
81 | { V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, |
82 | V4L2_MBUS_FMT_SRGGB10_1X10, 0, | |
1697e49a | 83 | V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, }, |
ad614acb | 84 | { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10, |
c09af044 | 85 | V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8, |
1697e49a | 86 | V4L2_PIX_FMT_SBGGR10, 10, 2, }, |
ad614acb | 87 | { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10, |
c09af044 | 88 | V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8, |
1697e49a | 89 | V4L2_PIX_FMT_SGBRG10, 10, 2, }, |
ad614acb | 90 | { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10, |
c09af044 | 91 | V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8, |
1697e49a | 92 | V4L2_PIX_FMT_SGRBG10, 10, 2, }, |
ad614acb | 93 | { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10, |
c09af044 | 94 | V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8, |
1697e49a | 95 | V4L2_PIX_FMT_SRGGB10, 10, 2, }, |
ad614acb | 96 | { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10, |
c09af044 | 97 | V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8, |
1697e49a | 98 | V4L2_PIX_FMT_SBGGR12, 12, 2, }, |
ad614acb | 99 | { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10, |
c09af044 | 100 | V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8, |
1697e49a | 101 | V4L2_PIX_FMT_SGBRG12, 12, 2, }, |
ad614acb | 102 | { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10, |
c09af044 | 103 | V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8, |
1697e49a | 104 | V4L2_PIX_FMT_SGRBG12, 12, 2, }, |
ad614acb | 105 | { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10, |
c09af044 | 106 | V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8, |
1697e49a | 107 | V4L2_PIX_FMT_SRGGB12, 12, 2, }, |
ad614acb | 108 | { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16, |
c09af044 | 109 | V4L2_MBUS_FMT_UYVY8_1X16, 0, |
1697e49a | 110 | V4L2_PIX_FMT_UYVY, 16, 2, }, |
ad614acb | 111 | { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16, |
c09af044 | 112 | V4L2_MBUS_FMT_YUYV8_1X16, 0, |
1697e49a | 113 | V4L2_PIX_FMT_YUYV, 16, 2, }, |
0810fd9c LP |
114 | { V4L2_MBUS_FMT_UYVY8_2X8, V4L2_MBUS_FMT_UYVY8_2X8, |
115 | V4L2_MBUS_FMT_UYVY8_2X8, 0, | |
116 | V4L2_PIX_FMT_UYVY, 8, 2, }, | |
117 | { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_MBUS_FMT_YUYV8_2X8, | |
118 | V4L2_MBUS_FMT_YUYV8_2X8, 0, | |
119 | V4L2_PIX_FMT_YUYV, 8, 2, }, | |
c51364ca LP |
120 | /* Empty entry to catch the unsupported pixel code (0) used by the CCDC |
121 | * module and avoid NULL pointer dereferences. | |
122 | */ | |
123 | { 0, } | |
ad614acb LP |
124 | }; |
125 | ||
126 | const struct isp_format_info * | |
127 | omap3isp_video_format_info(enum v4l2_mbus_pixelcode code) | |
128 | { | |
129 | unsigned int i; | |
130 | ||
131 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
132 | if (formats[i].code == code) | |
133 | return &formats[i]; | |
134 | } | |
135 | ||
136 | return NULL; | |
137 | } | |
138 | ||
139 | /* | |
140 | * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format | |
141 | * @video: ISP video instance | |
142 | * @mbus: v4l2_mbus_framefmt format (input) | |
143 | * @pix: v4l2_pix_format format (output) | |
144 | * | |
145 | * Fill the output pix structure with information from the input mbus format. | |
146 | * The bytesperline and sizeimage fields are computed from the requested bytes | |
147 | * per line value in the pix format and information from the video instance. | |
148 | * | |
149 | * Return the number of padding bytes at end of line. | |
150 | */ | |
151 | static unsigned int isp_video_mbus_to_pix(const struct isp_video *video, | |
152 | const struct v4l2_mbus_framefmt *mbus, | |
153 | struct v4l2_pix_format *pix) | |
154 | { | |
155 | unsigned int bpl = pix->bytesperline; | |
156 | unsigned int min_bpl; | |
157 | unsigned int i; | |
158 | ||
159 | memset(pix, 0, sizeof(*pix)); | |
160 | pix->width = mbus->width; | |
161 | pix->height = mbus->height; | |
162 | ||
163 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
164 | if (formats[i].code == mbus->code) | |
165 | break; | |
166 | } | |
167 | ||
168 | if (WARN_ON(i == ARRAY_SIZE(formats))) | |
169 | return 0; | |
170 | ||
1697e49a | 171 | min_bpl = pix->width * formats[i].bpp; |
ad614acb LP |
172 | |
173 | /* Clamp the requested bytes per line value. If the maximum bytes per | |
174 | * line value is zero, the module doesn't support user configurable line | |
175 | * sizes. Override the requested value with the minimum in that case. | |
176 | */ | |
177 | if (video->bpl_max) | |
178 | bpl = clamp(bpl, min_bpl, video->bpl_max); | |
179 | else | |
180 | bpl = min_bpl; | |
181 | ||
182 | if (!video->bpl_zero_padding || bpl != min_bpl) | |
183 | bpl = ALIGN(bpl, video->bpl_alignment); | |
184 | ||
185 | pix->pixelformat = formats[i].pixelformat; | |
186 | pix->bytesperline = bpl; | |
187 | pix->sizeimage = pix->bytesperline * pix->height; | |
188 | pix->colorspace = mbus->colorspace; | |
189 | pix->field = mbus->field; | |
190 | ||
191 | return bpl - min_bpl; | |
192 | } | |
193 | ||
194 | static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix, | |
195 | struct v4l2_mbus_framefmt *mbus) | |
196 | { | |
197 | unsigned int i; | |
198 | ||
199 | memset(mbus, 0, sizeof(*mbus)); | |
200 | mbus->width = pix->width; | |
201 | mbus->height = pix->height; | |
202 | ||
c3cd2574 LP |
203 | /* Skip the last format in the loop so that it will be selected if no |
204 | * match is found. | |
205 | */ | |
206 | for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { | |
ad614acb LP |
207 | if (formats[i].pixelformat == pix->pixelformat) |
208 | break; | |
209 | } | |
210 | ||
ad614acb LP |
211 | mbus->code = formats[i].code; |
212 | mbus->colorspace = pix->colorspace; | |
213 | mbus->field = pix->field; | |
214 | } | |
215 | ||
216 | static struct v4l2_subdev * | |
217 | isp_video_remote_subdev(struct isp_video *video, u32 *pad) | |
218 | { | |
219 | struct media_pad *remote; | |
220 | ||
1bddf1b3 | 221 | remote = media_entity_remote_pad(&video->pad); |
ad614acb LP |
222 | |
223 | if (remote == NULL || | |
224 | media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV) | |
225 | return NULL; | |
226 | ||
227 | if (pad) | |
228 | *pad = remote->index; | |
229 | ||
230 | return media_entity_to_v4l2_subdev(remote->entity); | |
231 | } | |
232 | ||
233 | /* Return a pointer to the ISP video instance at the far end of the pipeline. */ | |
ae5df813 SA |
234 | static int isp_video_get_graph_data(struct isp_video *video, |
235 | struct isp_pipeline *pipe) | |
ad614acb LP |
236 | { |
237 | struct media_entity_graph graph; | |
238 | struct media_entity *entity = &video->video.entity; | |
239 | struct media_device *mdev = entity->parent; | |
240 | struct isp_video *far_end = NULL; | |
241 | ||
242 | mutex_lock(&mdev->graph_mutex); | |
243 | media_entity_graph_walk_start(&graph, entity); | |
244 | ||
245 | while ((entity = media_entity_graph_walk_next(&graph))) { | |
ae5df813 SA |
246 | struct isp_video *__video; |
247 | ||
248 | pipe->entities |= 1 << entity->id; | |
249 | ||
250 | if (far_end != NULL) | |
251 | continue; | |
252 | ||
ad614acb LP |
253 | if (entity == &video->video.entity) |
254 | continue; | |
255 | ||
256 | if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) | |
257 | continue; | |
258 | ||
ae5df813 SA |
259 | __video = to_isp_video(media_entity_to_video_device(entity)); |
260 | if (__video->type != video->type) | |
261 | far_end = __video; | |
ad614acb LP |
262 | } |
263 | ||
264 | mutex_unlock(&mdev->graph_mutex); | |
ae5df813 SA |
265 | |
266 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
267 | pipe->input = far_end; | |
268 | pipe->output = video; | |
269 | } else { | |
270 | if (far_end == NULL) | |
271 | return -EPIPE; | |
272 | ||
273 | pipe->input = video; | |
274 | pipe->output = far_end; | |
275 | } | |
276 | ||
277 | return 0; | |
ad614acb LP |
278 | } |
279 | ||
ad614acb LP |
280 | static int |
281 | __isp_video_get_format(struct isp_video *video, struct v4l2_format *format) | |
282 | { | |
283 | struct v4l2_subdev_format fmt; | |
284 | struct v4l2_subdev *subdev; | |
285 | u32 pad; | |
286 | int ret; | |
287 | ||
288 | subdev = isp_video_remote_subdev(video, &pad); | |
289 | if (subdev == NULL) | |
290 | return -EINVAL; | |
291 | ||
ad614acb LP |
292 | fmt.pad = pad; |
293 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
ad614acb | 294 | |
5264682a LP |
295 | mutex_lock(&video->mutex); |
296 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
ad614acb LP |
297 | mutex_unlock(&video->mutex); |
298 | ||
299 | if (ret) | |
300 | return ret; | |
301 | ||
302 | format->type = video->type; | |
303 | return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); | |
304 | } | |
305 | ||
306 | static int | |
307 | isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh) | |
308 | { | |
309 | struct v4l2_format format; | |
310 | int ret; | |
311 | ||
312 | memcpy(&format, &vfh->format, sizeof(format)); | |
313 | ret = __isp_video_get_format(video, &format); | |
314 | if (ret < 0) | |
315 | return ret; | |
316 | ||
317 | if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat || | |
318 | vfh->format.fmt.pix.height != format.fmt.pix.height || | |
319 | vfh->format.fmt.pix.width != format.fmt.pix.width || | |
320 | vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline || | |
321 | vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage) | |
322 | return -EINVAL; | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
ad614acb LP |
327 | /* ----------------------------------------------------------------------------- |
328 | * Video queue operations | |
329 | */ | |
330 | ||
331 | static void isp_video_queue_prepare(struct isp_video_queue *queue, | |
332 | unsigned int *nbuffers, unsigned int *size) | |
333 | { | |
334 | struct isp_video_fh *vfh = | |
335 | container_of(queue, struct isp_video_fh, queue); | |
336 | struct isp_video *video = vfh->video; | |
337 | ||
338 | *size = vfh->format.fmt.pix.sizeimage; | |
339 | if (*size == 0) | |
340 | return; | |
341 | ||
342 | *nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size)); | |
343 | } | |
344 | ||
ad614acb LP |
345 | static int isp_video_buffer_prepare(struct isp_video_buffer *buf) |
346 | { | |
347 | struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue); | |
348 | struct isp_buffer *buffer = to_isp_buffer(buf); | |
349 | struct isp_video *video = vfh->video; | |
ad614acb | 350 | |
661112cb LP |
351 | /* Refuse to prepare the buffer is the video node has registered an |
352 | * error. We don't need to take any lock here as the operation is | |
353 | * inherently racy. The authoritative check will be performed in the | |
354 | * queue handler, which can't return an error, this check is just a best | |
355 | * effort to notify userspace as early as possible. | |
356 | */ | |
357 | if (unlikely(video->error)) | |
358 | return -EIO; | |
359 | ||
9000427a | 360 | buffer->isp_addr = buf->dma; |
ad614acb LP |
361 | return 0; |
362 | } | |
363 | ||
364 | /* | |
365 | * isp_video_buffer_queue - Add buffer to streaming queue | |
366 | * @buf: Video buffer | |
367 | * | |
368 | * In memory-to-memory mode, start streaming on the pipeline if buffers are | |
369 | * queued on both the input and the output, if the pipeline isn't already busy. | |
370 | * If the pipeline is busy, it will be restarted in the output module interrupt | |
371 | * handler. | |
372 | */ | |
373 | static void isp_video_buffer_queue(struct isp_video_buffer *buf) | |
374 | { | |
375 | struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue); | |
376 | struct isp_buffer *buffer = to_isp_buffer(buf); | |
377 | struct isp_video *video = vfh->video; | |
378 | struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); | |
379 | enum isp_pipeline_state state; | |
380 | unsigned long flags; | |
381 | unsigned int empty; | |
382 | unsigned int start; | |
383 | ||
e8feb876 LP |
384 | spin_lock_irqsave(&video->irqlock, flags); |
385 | ||
661112cb LP |
386 | if (unlikely(video->error)) { |
387 | buf->state = ISP_BUF_STATE_ERROR; | |
388 | wake_up(&buf->wait); | |
e8feb876 | 389 | spin_unlock_irqrestore(&video->irqlock, flags); |
661112cb LP |
390 | return; |
391 | } | |
392 | ||
ad614acb | 393 | empty = list_empty(&video->dmaqueue); |
eb2c00d2 | 394 | list_add_tail(&buffer->irqlist, &video->dmaqueue); |
ad614acb | 395 | |
e8feb876 LP |
396 | spin_unlock_irqrestore(&video->irqlock, flags); |
397 | ||
ad614acb LP |
398 | if (empty) { |
399 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
400 | state = ISP_PIPELINE_QUEUE_OUTPUT; | |
401 | else | |
402 | state = ISP_PIPELINE_QUEUE_INPUT; | |
403 | ||
404 | spin_lock_irqsave(&pipe->lock, flags); | |
405 | pipe->state |= state; | |
406 | video->ops->queue(video, buffer); | |
407 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; | |
408 | ||
409 | start = isp_pipeline_ready(pipe); | |
410 | if (start) | |
411 | pipe->state |= ISP_PIPELINE_STREAM; | |
412 | spin_unlock_irqrestore(&pipe->lock, flags); | |
413 | ||
414 | if (start) | |
415 | omap3isp_pipeline_set_stream(pipe, | |
416 | ISP_PIPELINE_STREAM_SINGLESHOT); | |
417 | } | |
418 | } | |
419 | ||
420 | static const struct isp_video_queue_operations isp_video_queue_ops = { | |
421 | .queue_prepare = &isp_video_queue_prepare, | |
422 | .buffer_prepare = &isp_video_buffer_prepare, | |
423 | .buffer_queue = &isp_video_buffer_queue, | |
ad614acb LP |
424 | }; |
425 | ||
426 | /* | |
427 | * omap3isp_video_buffer_next - Complete the current buffer and return the next | |
428 | * @video: ISP video object | |
ad614acb LP |
429 | * |
430 | * Remove the current video buffer from the DMA queue and fill its timestamp, | |
431 | * field count and state fields before waking up its completion handler. | |
432 | * | |
875e2e3e LP |
433 | * For capture video nodes the buffer state is set to ISP_BUF_STATE_DONE if no |
434 | * error has been flagged in the pipeline, or to ISP_BUF_STATE_ERROR otherwise. | |
435 | * For video output nodes the buffer state is always set to ISP_BUF_STATE_DONE. | |
ad614acb LP |
436 | * |
437 | * The DMA queue is expected to contain at least one buffer. | |
438 | * | |
439 | * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is | |
440 | * empty. | |
441 | */ | |
875e2e3e | 442 | struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video) |
ad614acb LP |
443 | { |
444 | struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); | |
445 | struct isp_video_queue *queue = video->queue; | |
2a6dc96b LP |
446 | struct isp_video_fh *vfh = |
447 | container_of(queue, struct isp_video_fh, queue); | |
ad614acb | 448 | enum isp_pipeline_state state; |
eb2c00d2 | 449 | struct isp_buffer *buf; |
ad614acb LP |
450 | unsigned long flags; |
451 | struct timespec ts; | |
452 | ||
e8feb876 | 453 | spin_lock_irqsave(&video->irqlock, flags); |
ad614acb | 454 | if (WARN_ON(list_empty(&video->dmaqueue))) { |
e8feb876 | 455 | spin_unlock_irqrestore(&video->irqlock, flags); |
ad614acb LP |
456 | return NULL; |
457 | } | |
458 | ||
eb2c00d2 | 459 | buf = list_first_entry(&video->dmaqueue, struct isp_buffer, |
ad614acb LP |
460 | irqlist); |
461 | list_del(&buf->irqlist); | |
e8feb876 | 462 | spin_unlock_irqrestore(&video->irqlock, flags); |
ad614acb | 463 | |
eb2c00d2 | 464 | buf->buffer.vbuf.bytesused = vfh->format.fmt.pix.sizeimage; |
2a6dc96b | 465 | |
ad614acb | 466 | ktime_get_ts(&ts); |
eb2c00d2 LP |
467 | buf->buffer.vbuf.timestamp.tv_sec = ts.tv_sec; |
468 | buf->buffer.vbuf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
ad614acb LP |
469 | |
470 | /* Do frame number propagation only if this is the output video node. | |
471 | * Frame number either comes from the CSI receivers or it gets | |
472 | * incremented here if H3A is not active. | |
473 | * Note: There is no guarantee that the output buffer will finish | |
474 | * first, so the input number might lag behind by 1 in some cases. | |
475 | */ | |
476 | if (video == pipe->output && !pipe->do_propagation) | |
eb2c00d2 LP |
477 | buf->buffer.vbuf.sequence = |
478 | atomic_inc_return(&pipe->frame_number); | |
ad614acb | 479 | else |
eb2c00d2 | 480 | buf->buffer.vbuf.sequence = atomic_read(&pipe->frame_number); |
ad614acb | 481 | |
875e2e3e LP |
482 | /* Report pipeline errors to userspace on the capture device side. */ |
483 | if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) { | |
eb2c00d2 | 484 | buf->buffer.state = ISP_BUF_STATE_ERROR; |
875e2e3e LP |
485 | pipe->error = false; |
486 | } else { | |
eb2c00d2 | 487 | buf->buffer.state = ISP_BUF_STATE_DONE; |
875e2e3e | 488 | } |
ad614acb | 489 | |
eb2c00d2 | 490 | wake_up(&buf->buffer.wait); |
ad614acb LP |
491 | |
492 | if (list_empty(&video->dmaqueue)) { | |
493 | if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
494 | state = ISP_PIPELINE_QUEUE_OUTPUT | |
495 | | ISP_PIPELINE_STREAM; | |
496 | else | |
497 | state = ISP_PIPELINE_QUEUE_INPUT | |
498 | | ISP_PIPELINE_STREAM; | |
499 | ||
500 | spin_lock_irqsave(&pipe->lock, flags); | |
501 | pipe->state &= ~state; | |
502 | if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS) | |
503 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; | |
504 | spin_unlock_irqrestore(&pipe->lock, flags); | |
505 | return NULL; | |
506 | } | |
507 | ||
508 | if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { | |
509 | spin_lock_irqsave(&pipe->lock, flags); | |
510 | pipe->state &= ~ISP_PIPELINE_STREAM; | |
511 | spin_unlock_irqrestore(&pipe->lock, flags); | |
512 | } | |
513 | ||
eb2c00d2 | 514 | buf = list_first_entry(&video->dmaqueue, struct isp_buffer, |
ad614acb | 515 | irqlist); |
eb2c00d2 LP |
516 | buf->buffer.state = ISP_BUF_STATE_ACTIVE; |
517 | return buf; | |
ad614acb LP |
518 | } |
519 | ||
661112cb LP |
520 | /* |
521 | * omap3isp_video_cancel_stream - Cancel stream on a video node | |
522 | * @video: ISP video object | |
523 | * | |
524 | * Cancelling a stream mark all buffers on the video node as erroneous and makes | |
525 | * sure no new buffer can be queued. | |
526 | */ | |
527 | void omap3isp_video_cancel_stream(struct isp_video *video) | |
528 | { | |
661112cb LP |
529 | unsigned long flags; |
530 | ||
e8feb876 | 531 | spin_lock_irqsave(&video->irqlock, flags); |
661112cb LP |
532 | |
533 | while (!list_empty(&video->dmaqueue)) { | |
eb2c00d2 | 534 | struct isp_buffer *buf; |
661112cb LP |
535 | |
536 | buf = list_first_entry(&video->dmaqueue, | |
eb2c00d2 | 537 | struct isp_buffer, irqlist); |
661112cb LP |
538 | list_del(&buf->irqlist); |
539 | ||
eb2c00d2 LP |
540 | buf->buffer.state = ISP_BUF_STATE_ERROR; |
541 | wake_up(&buf->buffer.wait); | |
661112cb LP |
542 | } |
543 | ||
544 | video->error = true; | |
545 | ||
e8feb876 | 546 | spin_unlock_irqrestore(&video->irqlock, flags); |
661112cb LP |
547 | } |
548 | ||
ad614acb LP |
549 | /* |
550 | * omap3isp_video_resume - Perform resume operation on the buffers | |
551 | * @video: ISP video object | |
25985edc | 552 | * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise |
ad614acb LP |
553 | * |
554 | * This function is intended to be used on suspend/resume scenario. It | |
555 | * requests video queue layer to discard buffers marked as DONE if it's in | |
556 | * continuous mode and requests ISP modules to queue again the ACTIVE buffer | |
557 | * if there's any. | |
558 | */ | |
559 | void omap3isp_video_resume(struct isp_video *video, int continuous) | |
560 | { | |
561 | struct isp_buffer *buf = NULL; | |
562 | ||
988d54c4 LP |
563 | if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
564 | mutex_lock(&video->queue_lock); | |
ad614acb | 565 | omap3isp_video_queue_discard_done(video->queue); |
988d54c4 LP |
566 | mutex_unlock(&video->queue_lock); |
567 | } | |
ad614acb LP |
568 | |
569 | if (!list_empty(&video->dmaqueue)) { | |
570 | buf = list_first_entry(&video->dmaqueue, | |
eb2c00d2 | 571 | struct isp_buffer, irqlist); |
ad614acb LP |
572 | video->ops->queue(video, buf); |
573 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; | |
574 | } else { | |
575 | if (continuous) | |
576 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; | |
577 | } | |
578 | } | |
579 | ||
580 | /* ----------------------------------------------------------------------------- | |
581 | * V4L2 ioctls | |
582 | */ | |
583 | ||
584 | static int | |
585 | isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) | |
586 | { | |
587 | struct isp_video *video = video_drvdata(file); | |
588 | ||
589 | strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver)); | |
590 | strlcpy(cap->card, video->video.name, sizeof(cap->card)); | |
591 | strlcpy(cap->bus_info, "media", sizeof(cap->bus_info)); | |
ad614acb LP |
592 | |
593 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
594 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
595 | else | |
596 | cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | static int | |
602 | isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format) | |
603 | { | |
604 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
605 | struct isp_video *video = video_drvdata(file); | |
606 | ||
607 | if (format->type != video->type) | |
608 | return -EINVAL; | |
609 | ||
610 | mutex_lock(&video->mutex); | |
611 | *format = vfh->format; | |
612 | mutex_unlock(&video->mutex); | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | static int | |
618 | isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format) | |
619 | { | |
620 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
621 | struct isp_video *video = video_drvdata(file); | |
622 | struct v4l2_mbus_framefmt fmt; | |
623 | ||
624 | if (format->type != video->type) | |
625 | return -EINVAL; | |
626 | ||
627 | mutex_lock(&video->mutex); | |
628 | ||
629 | /* Fill the bytesperline and sizeimage fields by converting to media bus | |
630 | * format and back to pixel format. | |
631 | */ | |
632 | isp_video_pix_to_mbus(&format->fmt.pix, &fmt); | |
633 | isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix); | |
634 | ||
635 | vfh->format = *format; | |
636 | ||
637 | mutex_unlock(&video->mutex); | |
638 | return 0; | |
639 | } | |
640 | ||
641 | static int | |
642 | isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format) | |
643 | { | |
644 | struct isp_video *video = video_drvdata(file); | |
645 | struct v4l2_subdev_format fmt; | |
646 | struct v4l2_subdev *subdev; | |
647 | u32 pad; | |
648 | int ret; | |
649 | ||
650 | if (format->type != video->type) | |
651 | return -EINVAL; | |
652 | ||
653 | subdev = isp_video_remote_subdev(video, &pad); | |
654 | if (subdev == NULL) | |
655 | return -EINVAL; | |
656 | ||
657 | isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format); | |
658 | ||
659 | fmt.pad = pad; | |
660 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
661 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
662 | if (ret) | |
a694f1b2 | 663 | return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
ad614acb LP |
664 | |
665 | isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); | |
666 | return 0; | |
667 | } | |
668 | ||
669 | static int | |
670 | isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap) | |
671 | { | |
672 | struct isp_video *video = video_drvdata(file); | |
673 | struct v4l2_subdev *subdev; | |
674 | int ret; | |
675 | ||
676 | subdev = isp_video_remote_subdev(video, NULL); | |
677 | if (subdev == NULL) | |
678 | return -EINVAL; | |
679 | ||
680 | mutex_lock(&video->mutex); | |
681 | ret = v4l2_subdev_call(subdev, video, cropcap, cropcap); | |
682 | mutex_unlock(&video->mutex); | |
683 | ||
a694f1b2 | 684 | return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
ad614acb LP |
685 | } |
686 | ||
687 | static int | |
688 | isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop) | |
689 | { | |
690 | struct isp_video *video = video_drvdata(file); | |
691 | struct v4l2_subdev_format format; | |
692 | struct v4l2_subdev *subdev; | |
693 | u32 pad; | |
694 | int ret; | |
695 | ||
696 | subdev = isp_video_remote_subdev(video, &pad); | |
697 | if (subdev == NULL) | |
698 | return -EINVAL; | |
699 | ||
700 | /* Try the get crop operation first and fallback to get format if not | |
701 | * implemented. | |
702 | */ | |
703 | ret = v4l2_subdev_call(subdev, video, g_crop, crop); | |
704 | if (ret != -ENOIOCTLCMD) | |
705 | return ret; | |
706 | ||
707 | format.pad = pad; | |
708 | format.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
709 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format); | |
710 | if (ret < 0) | |
a694f1b2 | 711 | return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
ad614acb LP |
712 | |
713 | crop->c.left = 0; | |
714 | crop->c.top = 0; | |
715 | crop->c.width = format.format.width; | |
716 | crop->c.height = format.format.height; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | static int | |
1fa48cd5 | 722 | isp_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop) |
ad614acb LP |
723 | { |
724 | struct isp_video *video = video_drvdata(file); | |
725 | struct v4l2_subdev *subdev; | |
726 | int ret; | |
727 | ||
728 | subdev = isp_video_remote_subdev(video, NULL); | |
729 | if (subdev == NULL) | |
730 | return -EINVAL; | |
731 | ||
732 | mutex_lock(&video->mutex); | |
733 | ret = v4l2_subdev_call(subdev, video, s_crop, crop); | |
734 | mutex_unlock(&video->mutex); | |
735 | ||
a694f1b2 | 736 | return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
ad614acb LP |
737 | } |
738 | ||
739 | static int | |
740 | isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
741 | { | |
742 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
743 | struct isp_video *video = video_drvdata(file); | |
744 | ||
745 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
746 | video->type != a->type) | |
747 | return -EINVAL; | |
748 | ||
749 | memset(a, 0, sizeof(*a)); | |
750 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
751 | a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; | |
752 | a->parm.output.timeperframe = vfh->timeperframe; | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | static int | |
758 | isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
759 | { | |
760 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
761 | struct isp_video *video = video_drvdata(file); | |
762 | ||
763 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
764 | video->type != a->type) | |
765 | return -EINVAL; | |
766 | ||
767 | if (a->parm.output.timeperframe.denominator == 0) | |
768 | a->parm.output.timeperframe.denominator = 1; | |
769 | ||
770 | vfh->timeperframe = a->parm.output.timeperframe; | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | static int | |
776 | isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) | |
777 | { | |
778 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
988d54c4 LP |
779 | struct isp_video *video = video_drvdata(file); |
780 | int ret; | |
781 | ||
782 | mutex_lock(&video->queue_lock); | |
783 | ret = omap3isp_video_queue_reqbufs(&vfh->queue, rb); | |
784 | mutex_unlock(&video->queue_lock); | |
ad614acb | 785 | |
988d54c4 | 786 | return ret; |
ad614acb LP |
787 | } |
788 | ||
789 | static int | |
790 | isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
791 | { | |
792 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
988d54c4 LP |
793 | struct isp_video *video = video_drvdata(file); |
794 | int ret; | |
ad614acb | 795 | |
988d54c4 LP |
796 | mutex_lock(&video->queue_lock); |
797 | ret = omap3isp_video_queue_querybuf(&vfh->queue, b); | |
798 | mutex_unlock(&video->queue_lock); | |
799 | ||
800 | return ret; | |
ad614acb LP |
801 | } |
802 | ||
803 | static int | |
804 | isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
805 | { | |
806 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
988d54c4 LP |
807 | struct isp_video *video = video_drvdata(file); |
808 | int ret; | |
809 | ||
810 | mutex_lock(&video->queue_lock); | |
811 | ret = omap3isp_video_queue_qbuf(&vfh->queue, b); | |
812 | mutex_unlock(&video->queue_lock); | |
ad614acb | 813 | |
988d54c4 | 814 | return ret; |
ad614acb LP |
815 | } |
816 | ||
817 | static int | |
818 | isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
819 | { | |
820 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
988d54c4 LP |
821 | struct isp_video *video = video_drvdata(file); |
822 | int ret; | |
823 | ||
824 | mutex_lock(&video->queue_lock); | |
825 | ret = omap3isp_video_queue_dqbuf(&vfh->queue, b, | |
826 | file->f_flags & O_NONBLOCK); | |
827 | mutex_unlock(&video->queue_lock); | |
ad614acb | 828 | |
988d54c4 | 829 | return ret; |
ad614acb LP |
830 | } |
831 | ||
ccddd916 SA |
832 | static int isp_video_check_external_subdevs(struct isp_video *video, |
833 | struct isp_pipeline *pipe) | |
834 | { | |
835 | struct isp_device *isp = video->isp; | |
836 | struct media_entity *ents[] = { | |
837 | &isp->isp_csi2a.subdev.entity, | |
838 | &isp->isp_csi2c.subdev.entity, | |
839 | &isp->isp_ccp2.subdev.entity, | |
840 | &isp->isp_ccdc.subdev.entity | |
841 | }; | |
842 | struct media_pad *source_pad; | |
843 | struct media_entity *source = NULL; | |
844 | struct media_entity *sink; | |
845 | struct v4l2_subdev_format fmt; | |
846 | struct v4l2_ext_controls ctrls; | |
847 | struct v4l2_ext_control ctrl; | |
848 | unsigned int i; | |
7c486c0f | 849 | int ret; |
ccddd916 | 850 | |
4b2f1ed1 LP |
851 | /* Memory-to-memory pipelines have no external subdev. */ |
852 | if (pipe->input != NULL) | |
853 | return 0; | |
854 | ||
ccddd916 SA |
855 | for (i = 0; i < ARRAY_SIZE(ents); i++) { |
856 | /* Is the entity part of the pipeline? */ | |
857 | if (!(pipe->entities & (1 << ents[i]->id))) | |
858 | continue; | |
859 | ||
860 | /* ISP entities have always sink pad == 0. Find source. */ | |
1bddf1b3 | 861 | source_pad = media_entity_remote_pad(&ents[i]->pads[0]); |
ccddd916 SA |
862 | if (source_pad == NULL) |
863 | continue; | |
864 | ||
865 | source = source_pad->entity; | |
866 | sink = ents[i]; | |
867 | break; | |
868 | } | |
869 | ||
870 | if (!source) { | |
871 | dev_warn(isp->dev, "can't find source, failing now\n"); | |
7c486c0f | 872 | return -EINVAL; |
ccddd916 SA |
873 | } |
874 | ||
875 | if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV) | |
876 | return 0; | |
877 | ||
878 | pipe->external = media_entity_to_v4l2_subdev(source); | |
879 | ||
880 | fmt.pad = source_pad->index; | |
881 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
882 | ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink), | |
883 | pad, get_fmt, NULL, &fmt); | |
884 | if (unlikely(ret < 0)) { | |
885 | dev_warn(isp->dev, "get_fmt returned null!\n"); | |
886 | return ret; | |
887 | } | |
888 | ||
1697e49a LP |
889 | pipe->external_width = |
890 | omap3isp_video_format_info(fmt.format.code)->width; | |
ccddd916 SA |
891 | |
892 | memset(&ctrls, 0, sizeof(ctrls)); | |
893 | memset(&ctrl, 0, sizeof(ctrl)); | |
894 | ||
895 | ctrl.id = V4L2_CID_PIXEL_RATE; | |
896 | ||
897 | ctrls.count = 1; | |
898 | ctrls.controls = &ctrl; | |
899 | ||
900 | ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls); | |
901 | if (ret < 0) { | |
902 | dev_warn(isp->dev, "no pixel rate control in subdev %s\n", | |
903 | pipe->external->name); | |
904 | return ret; | |
905 | } | |
906 | ||
907 | pipe->external_rate = ctrl.value64; | |
908 | ||
a6d7a62d SA |
909 | if (pipe->entities & (1 << isp->isp_ccdc.subdev.entity.id)) { |
910 | unsigned int rate = UINT_MAX; | |
911 | /* | |
912 | * Check that maximum allowed CCDC pixel rate isn't | |
913 | * exceeded by the pixel rate. | |
914 | */ | |
915 | omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate); | |
916 | if (pipe->external_rate > rate) | |
917 | return -ENOSPC; | |
918 | } | |
919 | ||
ccddd916 SA |
920 | return 0; |
921 | } | |
922 | ||
ad614acb LP |
923 | /* |
924 | * Stream management | |
925 | * | |
926 | * Every ISP pipeline has a single input and a single output. The input can be | |
927 | * either a sensor or a video node. The output is always a video node. | |
928 | * | |
929 | * As every pipeline has an output video node, the ISP video objects at the | |
930 | * pipeline output stores the pipeline state. It tracks the streaming state of | |
931 | * both the input and output, as well as the availability of buffers. | |
932 | * | |
933 | * In sensor-to-memory mode, frames are always available at the pipeline input. | |
934 | * Starting the sensor usually requires I2C transfers and must be done in | |
935 | * interruptible context. The pipeline is started and stopped synchronously | |
936 | * to the stream on/off commands. All modules in the pipeline will get their | |
937 | * subdev set stream handler called. The module at the end of the pipeline must | |
938 | * delay starting the hardware until buffers are available at its output. | |
939 | * | |
940 | * In memory-to-memory mode, starting/stopping the stream requires | |
941 | * synchronization between the input and output. ISP modules can't be stopped | |
942 | * in the middle of a frame, and at least some of the modules seem to become | |
943 | * busy as soon as they're started, even if they don't receive a frame start | |
944 | * event. For that reason frames need to be processed in single-shot mode. The | |
945 | * driver needs to wait until a frame is completely processed and written to | |
946 | * memory before restarting the pipeline for the next frame. Pipelined | |
947 | * processing might be possible but requires more testing. | |
948 | * | |
949 | * Stream start must be delayed until buffers are available at both the input | |
950 | * and output. The pipeline must be started in the videobuf queue callback with | |
951 | * the buffers queue spinlock held. The modules subdev set stream operation must | |
952 | * not sleep. | |
953 | */ | |
954 | static int | |
955 | isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) | |
956 | { | |
957 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
958 | struct isp_video *video = video_drvdata(file); | |
959 | enum isp_pipeline_state state; | |
960 | struct isp_pipeline *pipe; | |
ad614acb LP |
961 | unsigned long flags; |
962 | int ret; | |
963 | ||
964 | if (type != video->type) | |
965 | return -EINVAL; | |
966 | ||
967 | mutex_lock(&video->stream_lock); | |
968 | ||
969 | if (video->streaming) { | |
970 | mutex_unlock(&video->stream_lock); | |
971 | return -EBUSY; | |
972 | } | |
973 | ||
974 | /* Start streaming on the pipeline. No link touching an entity in the | |
975 | * pipeline can be activated or deactivated once streaming is started. | |
976 | */ | |
977 | pipe = video->video.entity.pipe | |
978 | ? to_isp_pipeline(&video->video.entity) : &video->pipe; | |
b0cd79ed | 979 | |
ae5df813 SA |
980 | pipe->entities = 0; |
981 | ||
b0cd79ed SA |
982 | if (video->isp->pdata->set_constraints) |
983 | video->isp->pdata->set_constraints(video->isp, true); | |
984 | pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]); | |
985 | pipe->max_rate = pipe->l3_ick; | |
986 | ||
da39257f SA |
987 | ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe); |
988 | if (ret < 0) | |
989 | goto err_pipeline_start; | |
ad614acb LP |
990 | |
991 | /* Verify that the currently configured format matches the output of | |
992 | * the connected subdev. | |
993 | */ | |
994 | ret = isp_video_check_format(video, vfh); | |
995 | if (ret < 0) | |
da39257f | 996 | goto err_check_format; |
ad614acb LP |
997 | |
998 | video->bpl_padding = ret; | |
999 | video->bpl_value = vfh->format.fmt.pix.bytesperline; | |
1000 | ||
ae5df813 SA |
1001 | ret = isp_video_get_graph_data(video, pipe); |
1002 | if (ret < 0) | |
1003 | goto err_check_format; | |
ad614acb | 1004 | |
ae5df813 | 1005 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
ad614acb | 1006 | state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT; |
ae5df813 | 1007 | else |
ad614acb | 1008 | state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT; |
ad614acb | 1009 | |
ccddd916 SA |
1010 | ret = isp_video_check_external_subdevs(video, pipe); |
1011 | if (ret < 0) | |
1012 | goto err_check_format; | |
1013 | ||
875e2e3e LP |
1014 | pipe->error = false; |
1015 | ||
ad614acb LP |
1016 | spin_lock_irqsave(&pipe->lock, flags); |
1017 | pipe->state &= ~ISP_PIPELINE_STREAM; | |
1018 | pipe->state |= state; | |
1019 | spin_unlock_irqrestore(&pipe->lock, flags); | |
1020 | ||
1021 | /* Set the maximum time per frame as the value requested by userspace. | |
1022 | * This is a soft limit that can be overridden if the hardware doesn't | |
1023 | * support the request limit. | |
1024 | */ | |
1025 | if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) | |
1026 | pipe->max_timeperframe = vfh->timeperframe; | |
1027 | ||
1028 | video->queue = &vfh->queue; | |
1029 | INIT_LIST_HEAD(&video->dmaqueue); | |
1030 | atomic_set(&pipe->frame_number, -1); | |
1031 | ||
988d54c4 | 1032 | mutex_lock(&video->queue_lock); |
ad614acb | 1033 | ret = omap3isp_video_queue_streamon(&vfh->queue); |
988d54c4 | 1034 | mutex_unlock(&video->queue_lock); |
ad614acb | 1035 | if (ret < 0) |
da39257f | 1036 | goto err_check_format; |
ad614acb LP |
1037 | |
1038 | /* In sensor-to-memory mode, the stream can be started synchronously | |
1039 | * to the stream on command. In memory-to-memory mode, it will be | |
1040 | * started when buffers are queued on both the input and output. | |
1041 | */ | |
1042 | if (pipe->input == NULL) { | |
1043 | ret = omap3isp_pipeline_set_stream(pipe, | |
1044 | ISP_PIPELINE_STREAM_CONTINUOUS); | |
1045 | if (ret < 0) | |
da39257f | 1046 | goto err_set_stream; |
e8feb876 | 1047 | spin_lock_irqsave(&video->irqlock, flags); |
ad614acb LP |
1048 | if (list_empty(&video->dmaqueue)) |
1049 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; | |
e8feb876 | 1050 | spin_unlock_irqrestore(&video->irqlock, flags); |
ad614acb LP |
1051 | } |
1052 | ||
da39257f | 1053 | video->streaming = 1; |
ad614acb | 1054 | |
da39257f SA |
1055 | mutex_unlock(&video->stream_lock); |
1056 | return 0; | |
1057 | ||
1058 | err_set_stream: | |
988d54c4 | 1059 | mutex_lock(&video->queue_lock); |
da39257f | 1060 | omap3isp_video_queue_streamoff(&vfh->queue); |
988d54c4 | 1061 | mutex_unlock(&video->queue_lock); |
da39257f SA |
1062 | err_check_format: |
1063 | media_entity_pipeline_stop(&video->video.entity); | |
1064 | err_pipeline_start: | |
1065 | if (video->isp->pdata->set_constraints) | |
1066 | video->isp->pdata->set_constraints(video->isp, false); | |
1067 | /* The DMA queue must be emptied here, otherwise CCDC interrupts that | |
1068 | * will get triggered the next time the CCDC is powered up will try to | |
1069 | * access buffers that might have been freed but still present in the | |
1070 | * DMA queue. This can easily get triggered if the above | |
1071 | * omap3isp_pipeline_set_stream() call fails on a system with a | |
1072 | * free-running sensor. | |
1073 | */ | |
1074 | INIT_LIST_HEAD(&video->dmaqueue); | |
1075 | video->queue = NULL; | |
ad614acb LP |
1076 | |
1077 | mutex_unlock(&video->stream_lock); | |
1078 | return ret; | |
1079 | } | |
1080 | ||
1081 | static int | |
1082 | isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) | |
1083 | { | |
1084 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
1085 | struct isp_video *video = video_drvdata(file); | |
1086 | struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); | |
1087 | enum isp_pipeline_state state; | |
1088 | unsigned int streaming; | |
1089 | unsigned long flags; | |
1090 | ||
1091 | if (type != video->type) | |
1092 | return -EINVAL; | |
1093 | ||
1094 | mutex_lock(&video->stream_lock); | |
1095 | ||
1096 | /* Make sure we're not streaming yet. */ | |
988d54c4 | 1097 | mutex_lock(&video->queue_lock); |
ad614acb | 1098 | streaming = vfh->queue.streaming; |
988d54c4 | 1099 | mutex_unlock(&video->queue_lock); |
ad614acb LP |
1100 | |
1101 | if (!streaming) | |
1102 | goto done; | |
1103 | ||
1104 | /* Update the pipeline state. */ | |
1105 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1106 | state = ISP_PIPELINE_STREAM_OUTPUT | |
1107 | | ISP_PIPELINE_QUEUE_OUTPUT; | |
1108 | else | |
1109 | state = ISP_PIPELINE_STREAM_INPUT | |
1110 | | ISP_PIPELINE_QUEUE_INPUT; | |
1111 | ||
1112 | spin_lock_irqsave(&pipe->lock, flags); | |
1113 | pipe->state &= ~state; | |
1114 | spin_unlock_irqrestore(&pipe->lock, flags); | |
1115 | ||
1116 | /* Stop the stream. */ | |
1117 | omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED); | |
08344492 LP |
1118 | omap3isp_video_cancel_stream(video); |
1119 | ||
988d54c4 | 1120 | mutex_lock(&video->queue_lock); |
ad614acb | 1121 | omap3isp_video_queue_streamoff(&vfh->queue); |
988d54c4 | 1122 | mutex_unlock(&video->queue_lock); |
ad614acb LP |
1123 | video->queue = NULL; |
1124 | video->streaming = 0; | |
661112cb | 1125 | video->error = false; |
ad614acb | 1126 | |
4b0ec19e LP |
1127 | if (video->isp->pdata->set_constraints) |
1128 | video->isp->pdata->set_constraints(video->isp, false); | |
ad614acb LP |
1129 | media_entity_pipeline_stop(&video->video.entity); |
1130 | ||
1131 | done: | |
1132 | mutex_unlock(&video->stream_lock); | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | static int | |
1137 | isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) | |
1138 | { | |
1139 | if (input->index > 0) | |
1140 | return -EINVAL; | |
1141 | ||
1142 | strlcpy(input->name, "camera", sizeof(input->name)); | |
1143 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | static int | |
1149 | isp_video_g_input(struct file *file, void *fh, unsigned int *input) | |
1150 | { | |
1151 | *input = 0; | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | static int | |
1157 | isp_video_s_input(struct file *file, void *fh, unsigned int input) | |
1158 | { | |
1159 | return input == 0 ? 0 : -EINVAL; | |
1160 | } | |
1161 | ||
1162 | static const struct v4l2_ioctl_ops isp_video_ioctl_ops = { | |
1163 | .vidioc_querycap = isp_video_querycap, | |
1164 | .vidioc_g_fmt_vid_cap = isp_video_get_format, | |
1165 | .vidioc_s_fmt_vid_cap = isp_video_set_format, | |
1166 | .vidioc_try_fmt_vid_cap = isp_video_try_format, | |
1167 | .vidioc_g_fmt_vid_out = isp_video_get_format, | |
1168 | .vidioc_s_fmt_vid_out = isp_video_set_format, | |
1169 | .vidioc_try_fmt_vid_out = isp_video_try_format, | |
1170 | .vidioc_cropcap = isp_video_cropcap, | |
1171 | .vidioc_g_crop = isp_video_get_crop, | |
1172 | .vidioc_s_crop = isp_video_set_crop, | |
1173 | .vidioc_g_parm = isp_video_get_param, | |
1174 | .vidioc_s_parm = isp_video_set_param, | |
1175 | .vidioc_reqbufs = isp_video_reqbufs, | |
1176 | .vidioc_querybuf = isp_video_querybuf, | |
1177 | .vidioc_qbuf = isp_video_qbuf, | |
1178 | .vidioc_dqbuf = isp_video_dqbuf, | |
1179 | .vidioc_streamon = isp_video_streamon, | |
1180 | .vidioc_streamoff = isp_video_streamoff, | |
1181 | .vidioc_enum_input = isp_video_enum_input, | |
1182 | .vidioc_g_input = isp_video_g_input, | |
1183 | .vidioc_s_input = isp_video_s_input, | |
1184 | }; | |
1185 | ||
1186 | /* ----------------------------------------------------------------------------- | |
1187 | * V4L2 file operations | |
1188 | */ | |
1189 | ||
1190 | static int isp_video_open(struct file *file) | |
1191 | { | |
1192 | struct isp_video *video = video_drvdata(file); | |
1193 | struct isp_video_fh *handle; | |
1194 | int ret = 0; | |
1195 | ||
1196 | handle = kzalloc(sizeof(*handle), GFP_KERNEL); | |
1197 | if (handle == NULL) | |
1198 | return -ENOMEM; | |
1199 | ||
1200 | v4l2_fh_init(&handle->vfh, &video->video); | |
1201 | v4l2_fh_add(&handle->vfh); | |
1202 | ||
1203 | /* If this is the first user, initialise the pipeline. */ | |
1204 | if (omap3isp_get(video->isp) == NULL) { | |
1205 | ret = -EBUSY; | |
1206 | goto done; | |
1207 | } | |
1208 | ||
1209 | ret = omap3isp_pipeline_pm_use(&video->video.entity, 1); | |
1210 | if (ret < 0) { | |
1211 | omap3isp_put(video->isp); | |
1212 | goto done; | |
1213 | } | |
1214 | ||
1215 | omap3isp_video_queue_init(&handle->queue, video->type, | |
1216 | &isp_video_queue_ops, video->isp->dev, | |
1217 | sizeof(struct isp_buffer)); | |
1218 | ||
1219 | memset(&handle->format, 0, sizeof(handle->format)); | |
1220 | handle->format.type = video->type; | |
1221 | handle->timeperframe.denominator = 1; | |
1222 | ||
1223 | handle->video = video; | |
1224 | file->private_data = &handle->vfh; | |
1225 | ||
1226 | done: | |
1227 | if (ret < 0) { | |
1228 | v4l2_fh_del(&handle->vfh); | |
1229 | kfree(handle); | |
1230 | } | |
1231 | ||
1232 | return ret; | |
1233 | } | |
1234 | ||
1235 | static int isp_video_release(struct file *file) | |
1236 | { | |
1237 | struct isp_video *video = video_drvdata(file); | |
1238 | struct v4l2_fh *vfh = file->private_data; | |
1239 | struct isp_video_fh *handle = to_isp_video_fh(vfh); | |
1240 | ||
1241 | /* Disable streaming and free the buffers queue resources. */ | |
1242 | isp_video_streamoff(file, vfh, video->type); | |
1243 | ||
988d54c4 | 1244 | mutex_lock(&video->queue_lock); |
ad614acb | 1245 | omap3isp_video_queue_cleanup(&handle->queue); |
988d54c4 | 1246 | mutex_unlock(&video->queue_lock); |
ad614acb LP |
1247 | |
1248 | omap3isp_pipeline_pm_use(&video->video.entity, 0); | |
1249 | ||
1250 | /* Release the file handle. */ | |
1251 | v4l2_fh_del(vfh); | |
1252 | kfree(handle); | |
1253 | file->private_data = NULL; | |
1254 | ||
1255 | omap3isp_put(video->isp); | |
1256 | ||
1257 | return 0; | |
1258 | } | |
1259 | ||
1260 | static unsigned int isp_video_poll(struct file *file, poll_table *wait) | |
1261 | { | |
1262 | struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); | |
988d54c4 LP |
1263 | struct isp_video *video = video_drvdata(file); |
1264 | int ret; | |
ad614acb | 1265 | |
988d54c4 LP |
1266 | mutex_lock(&video->queue_lock); |
1267 | ret = omap3isp_video_queue_poll(&vfh->queue, file, wait); | |
1268 | mutex_unlock(&video->queue_lock); | |
1269 | ||
1270 | return ret; | |
ad614acb LP |
1271 | } |
1272 | ||
1273 | static int isp_video_mmap(struct file *file, struct vm_area_struct *vma) | |
1274 | { | |
1275 | struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); | |
988d54c4 LP |
1276 | struct isp_video *video = video_drvdata(file); |
1277 | int ret; | |
1278 | ||
1279 | mutex_lock(&video->queue_lock); | |
1280 | ret = omap3isp_video_queue_mmap(&vfh->queue, vma); | |
1281 | mutex_unlock(&video->queue_lock); | |
ad614acb | 1282 | |
988d54c4 | 1283 | return ret; |
ad614acb LP |
1284 | } |
1285 | ||
1286 | static struct v4l2_file_operations isp_video_fops = { | |
1287 | .owner = THIS_MODULE, | |
1288 | .unlocked_ioctl = video_ioctl2, | |
1289 | .open = isp_video_open, | |
1290 | .release = isp_video_release, | |
1291 | .poll = isp_video_poll, | |
1292 | .mmap = isp_video_mmap, | |
1293 | }; | |
1294 | ||
1295 | /* ----------------------------------------------------------------------------- | |
1296 | * ISP video core | |
1297 | */ | |
1298 | ||
1299 | static const struct isp_video_operations isp_video_dummy_ops = { | |
1300 | }; | |
1301 | ||
1302 | int omap3isp_video_init(struct isp_video *video, const char *name) | |
1303 | { | |
1304 | const char *direction; | |
1305 | int ret; | |
1306 | ||
1307 | switch (video->type) { | |
1308 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
1309 | direction = "output"; | |
8dad936a SA |
1310 | video->pad.flags = MEDIA_PAD_FL_SINK |
1311 | | MEDIA_PAD_FL_MUST_CONNECT; | |
ad614acb LP |
1312 | break; |
1313 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: | |
1314 | direction = "input"; | |
8dad936a SA |
1315 | video->pad.flags = MEDIA_PAD_FL_SOURCE |
1316 | | MEDIA_PAD_FL_MUST_CONNECT; | |
954f340f | 1317 | video->video.vfl_dir = VFL_DIR_TX; |
ad614acb LP |
1318 | break; |
1319 | ||
1320 | default: | |
1321 | return -EINVAL; | |
1322 | } | |
1323 | ||
1324 | ret = media_entity_init(&video->video.entity, 1, &video->pad, 0); | |
1325 | if (ret < 0) | |
1326 | return ret; | |
1327 | ||
1328 | mutex_init(&video->mutex); | |
1329 | atomic_set(&video->active, 0); | |
1330 | ||
1331 | spin_lock_init(&video->pipe.lock); | |
1332 | mutex_init(&video->stream_lock); | |
988d54c4 | 1333 | mutex_init(&video->queue_lock); |
e8feb876 | 1334 | spin_lock_init(&video->irqlock); |
ad614acb LP |
1335 | |
1336 | /* Initialize the video device. */ | |
1337 | if (video->ops == NULL) | |
1338 | video->ops = &isp_video_dummy_ops; | |
1339 | ||
1340 | video->video.fops = &isp_video_fops; | |
1341 | snprintf(video->video.name, sizeof(video->video.name), | |
1342 | "OMAP3 ISP %s %s", name, direction); | |
1343 | video->video.vfl_type = VFL_TYPE_GRABBER; | |
1344 | video->video.release = video_device_release_empty; | |
1345 | video->video.ioctl_ops = &isp_video_ioctl_ops; | |
1346 | video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED; | |
1347 | ||
1348 | video_set_drvdata(&video->video, video); | |
1349 | ||
1350 | return 0; | |
1351 | } | |
1352 | ||
63b4ca23 LP |
1353 | void omap3isp_video_cleanup(struct isp_video *video) |
1354 | { | |
1355 | media_entity_cleanup(&video->video.entity); | |
988d54c4 | 1356 | mutex_destroy(&video->queue_lock); |
ed33ac8e LP |
1357 | mutex_destroy(&video->stream_lock); |
1358 | mutex_destroy(&video->mutex); | |
63b4ca23 LP |
1359 | } |
1360 | ||
ad614acb LP |
1361 | int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev) |
1362 | { | |
1363 | int ret; | |
1364 | ||
1365 | video->video.v4l2_dev = vdev; | |
1366 | ||
1367 | ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); | |
1368 | if (ret < 0) | |
4feca39b LP |
1369 | dev_err(video->isp->dev, |
1370 | "%s: could not register video device (%d)\n", | |
ad614acb LP |
1371 | __func__, ret); |
1372 | ||
1373 | return ret; | |
1374 | } | |
1375 | ||
1376 | void omap3isp_video_unregister(struct isp_video *video) | |
1377 | { | |
63b4ca23 | 1378 | if (video_is_registered(&video->video)) |
ad614acb | 1379 | video_unregister_device(&video->video); |
ad614acb | 1380 | } |