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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> | |
29 | #include <linux/pagemap.h> | |
30 | #include <linux/scatterlist.h> | |
31 | #include <linux/sched.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/vmalloc.h> | |
34 | #include <media/v4l2-dev.h> | |
35 | #include <media/v4l2-ioctl.h> | |
36 | #include <plat/iommu.h> | |
37 | #include <plat/iovmm.h> | |
38 | #include <plat/omap-pm.h> | |
39 | ||
40 | #include "ispvideo.h" | |
41 | #include "isp.h" | |
42 | ||
43 | ||
44 | /* ----------------------------------------------------------------------------- | |
45 | * Helper functions | |
46 | */ | |
47 | ||
48 | static struct isp_format_info formats[] = { | |
49 | { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, | |
c09af044 MJ |
50 | V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, |
51 | V4L2_PIX_FMT_GREY, 8, }, | |
5782f97b | 52 | { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10, |
c09af044 MJ |
53 | V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8, |
54 | V4L2_PIX_FMT_Y10, 10, }, | |
5782f97b | 55 | { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10, |
c09af044 MJ |
56 | V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8, |
57 | V4L2_PIX_FMT_Y12, 12, }, | |
5782f97b | 58 | { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, |
c09af044 MJ |
59 | V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, |
60 | V4L2_PIX_FMT_SBGGR8, 8, }, | |
5782f97b | 61 | { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, |
c09af044 MJ |
62 | V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, |
63 | V4L2_PIX_FMT_SGBRG8, 8, }, | |
5782f97b | 64 | { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, |
c09af044 MJ |
65 | V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, |
66 | V4L2_PIX_FMT_SGRBG8, 8, }, | |
5782f97b | 67 | { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, |
c09af044 MJ |
68 | V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, |
69 | V4L2_PIX_FMT_SRGGB8, 8, }, | |
ad614acb | 70 | { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, |
c09af044 MJ |
71 | V4L2_MBUS_FMT_SGRBG10_1X10, 0, |
72 | V4L2_PIX_FMT_SGRBG10DPCM8, 8, }, | |
ad614acb | 73 | { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10, |
c09af044 MJ |
74 | V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8, |
75 | V4L2_PIX_FMT_SBGGR10, 10, }, | |
ad614acb | 76 | { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10, |
c09af044 MJ |
77 | V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8, |
78 | V4L2_PIX_FMT_SGBRG10, 10, }, | |
ad614acb | 79 | { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10, |
c09af044 MJ |
80 | V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8, |
81 | V4L2_PIX_FMT_SGRBG10, 10, }, | |
ad614acb | 82 | { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10, |
c09af044 MJ |
83 | V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8, |
84 | V4L2_PIX_FMT_SRGGB10, 10, }, | |
ad614acb | 85 | { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10, |
c09af044 MJ |
86 | V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8, |
87 | V4L2_PIX_FMT_SBGGR12, 12, }, | |
ad614acb | 88 | { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10, |
c09af044 MJ |
89 | V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8, |
90 | V4L2_PIX_FMT_SGBRG12, 12, }, | |
ad614acb | 91 | { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10, |
c09af044 MJ |
92 | V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8, |
93 | V4L2_PIX_FMT_SGRBG12, 12, }, | |
ad614acb | 94 | { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10, |
c09af044 MJ |
95 | V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8, |
96 | V4L2_PIX_FMT_SRGGB12, 12, }, | |
ad614acb | 97 | { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16, |
c09af044 MJ |
98 | V4L2_MBUS_FMT_UYVY8_1X16, 0, |
99 | V4L2_PIX_FMT_UYVY, 16, }, | |
ad614acb | 100 | { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16, |
c09af044 MJ |
101 | V4L2_MBUS_FMT_YUYV8_1X16, 0, |
102 | V4L2_PIX_FMT_YUYV, 16, }, | |
ad614acb LP |
103 | }; |
104 | ||
105 | const struct isp_format_info * | |
106 | omap3isp_video_format_info(enum v4l2_mbus_pixelcode code) | |
107 | { | |
108 | unsigned int i; | |
109 | ||
110 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
111 | if (formats[i].code == code) | |
112 | return &formats[i]; | |
113 | } | |
114 | ||
115 | return NULL; | |
116 | } | |
117 | ||
c09af044 MJ |
118 | /* |
119 | * Decide whether desired output pixel code can be obtained with | |
120 | * the lane shifter by shifting the input pixel code. | |
121 | * @in: input pixelcode to shifter | |
122 | * @out: output pixelcode from shifter | |
123 | * @additional_shift: # of bits the sensor's LSB is offset from CAMEXT[0] | |
124 | * | |
125 | * return true if the combination is possible | |
126 | * return false otherwise | |
127 | */ | |
128 | static bool isp_video_is_shiftable(enum v4l2_mbus_pixelcode in, | |
129 | enum v4l2_mbus_pixelcode out, | |
130 | unsigned int additional_shift) | |
131 | { | |
132 | const struct isp_format_info *in_info, *out_info; | |
133 | ||
134 | if (in == out) | |
135 | return true; | |
136 | ||
137 | in_info = omap3isp_video_format_info(in); | |
138 | out_info = omap3isp_video_format_info(out); | |
139 | ||
140 | if ((in_info->flavor == 0) || (out_info->flavor == 0)) | |
141 | return false; | |
142 | ||
143 | if (in_info->flavor != out_info->flavor) | |
144 | return false; | |
145 | ||
146 | return in_info->bpp - out_info->bpp + additional_shift <= 6; | |
147 | } | |
148 | ||
ad614acb LP |
149 | /* |
150 | * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format | |
151 | * @video: ISP video instance | |
152 | * @mbus: v4l2_mbus_framefmt format (input) | |
153 | * @pix: v4l2_pix_format format (output) | |
154 | * | |
155 | * Fill the output pix structure with information from the input mbus format. | |
156 | * The bytesperline and sizeimage fields are computed from the requested bytes | |
157 | * per line value in the pix format and information from the video instance. | |
158 | * | |
159 | * Return the number of padding bytes at end of line. | |
160 | */ | |
161 | static unsigned int isp_video_mbus_to_pix(const struct isp_video *video, | |
162 | const struct v4l2_mbus_framefmt *mbus, | |
163 | struct v4l2_pix_format *pix) | |
164 | { | |
165 | unsigned int bpl = pix->bytesperline; | |
166 | unsigned int min_bpl; | |
167 | unsigned int i; | |
168 | ||
169 | memset(pix, 0, sizeof(*pix)); | |
170 | pix->width = mbus->width; | |
171 | pix->height = mbus->height; | |
172 | ||
173 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
174 | if (formats[i].code == mbus->code) | |
175 | break; | |
176 | } | |
177 | ||
178 | if (WARN_ON(i == ARRAY_SIZE(formats))) | |
179 | return 0; | |
180 | ||
181 | min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8; | |
182 | ||
183 | /* Clamp the requested bytes per line value. If the maximum bytes per | |
184 | * line value is zero, the module doesn't support user configurable line | |
185 | * sizes. Override the requested value with the minimum in that case. | |
186 | */ | |
187 | if (video->bpl_max) | |
188 | bpl = clamp(bpl, min_bpl, video->bpl_max); | |
189 | else | |
190 | bpl = min_bpl; | |
191 | ||
192 | if (!video->bpl_zero_padding || bpl != min_bpl) | |
193 | bpl = ALIGN(bpl, video->bpl_alignment); | |
194 | ||
195 | pix->pixelformat = formats[i].pixelformat; | |
196 | pix->bytesperline = bpl; | |
197 | pix->sizeimage = pix->bytesperline * pix->height; | |
198 | pix->colorspace = mbus->colorspace; | |
199 | pix->field = mbus->field; | |
200 | ||
201 | return bpl - min_bpl; | |
202 | } | |
203 | ||
204 | static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix, | |
205 | struct v4l2_mbus_framefmt *mbus) | |
206 | { | |
207 | unsigned int i; | |
208 | ||
209 | memset(mbus, 0, sizeof(*mbus)); | |
210 | mbus->width = pix->width; | |
211 | mbus->height = pix->height; | |
212 | ||
213 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
214 | if (formats[i].pixelformat == pix->pixelformat) | |
215 | break; | |
216 | } | |
217 | ||
218 | if (WARN_ON(i == ARRAY_SIZE(formats))) | |
219 | return; | |
220 | ||
221 | mbus->code = formats[i].code; | |
222 | mbus->colorspace = pix->colorspace; | |
223 | mbus->field = pix->field; | |
224 | } | |
225 | ||
226 | static struct v4l2_subdev * | |
227 | isp_video_remote_subdev(struct isp_video *video, u32 *pad) | |
228 | { | |
229 | struct media_pad *remote; | |
230 | ||
231 | remote = media_entity_remote_source(&video->pad); | |
232 | ||
233 | if (remote == NULL || | |
234 | media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV) | |
235 | return NULL; | |
236 | ||
237 | if (pad) | |
238 | *pad = remote->index; | |
239 | ||
240 | return media_entity_to_v4l2_subdev(remote->entity); | |
241 | } | |
242 | ||
243 | /* Return a pointer to the ISP video instance at the far end of the pipeline. */ | |
244 | static struct isp_video * | |
245 | isp_video_far_end(struct isp_video *video) | |
246 | { | |
247 | struct media_entity_graph graph; | |
248 | struct media_entity *entity = &video->video.entity; | |
249 | struct media_device *mdev = entity->parent; | |
250 | struct isp_video *far_end = NULL; | |
251 | ||
252 | mutex_lock(&mdev->graph_mutex); | |
253 | media_entity_graph_walk_start(&graph, entity); | |
254 | ||
255 | while ((entity = media_entity_graph_walk_next(&graph))) { | |
256 | if (entity == &video->video.entity) | |
257 | continue; | |
258 | ||
259 | if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) | |
260 | continue; | |
261 | ||
262 | far_end = to_isp_video(media_entity_to_video_device(entity)); | |
263 | if (far_end->type != video->type) | |
264 | break; | |
265 | ||
266 | far_end = NULL; | |
267 | } | |
268 | ||
269 | mutex_unlock(&mdev->graph_mutex); | |
270 | return far_end; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Validate a pipeline by checking both ends of all links for format | |
275 | * discrepancies. | |
276 | * | |
277 | * Compute the minimum time per frame value as the maximum of time per frame | |
278 | * limits reported by every block in the pipeline. | |
279 | * | |
280 | * Return 0 if all formats match, or -EPIPE if at least one link is found with | |
281 | * different formats on its two ends. | |
282 | */ | |
283 | static int isp_video_validate_pipeline(struct isp_pipeline *pipe) | |
284 | { | |
285 | struct isp_device *isp = pipe->output->isp; | |
286 | struct v4l2_subdev_format fmt_source; | |
287 | struct v4l2_subdev_format fmt_sink; | |
288 | struct media_pad *pad; | |
289 | struct v4l2_subdev *subdev; | |
290 | int ret; | |
291 | ||
292 | pipe->max_rate = pipe->l3_ick; | |
293 | ||
294 | subdev = isp_video_remote_subdev(pipe->output, NULL); | |
295 | if (subdev == NULL) | |
296 | return -EPIPE; | |
297 | ||
298 | while (1) { | |
c09af044 | 299 | unsigned int shifter_link; |
ad614acb LP |
300 | /* Retrieve the sink format */ |
301 | pad = &subdev->entity.pads[0]; | |
302 | if (!(pad->flags & MEDIA_PAD_FL_SINK)) | |
303 | break; | |
304 | ||
305 | fmt_sink.pad = pad->index; | |
306 | fmt_sink.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
307 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_sink); | |
308 | if (ret < 0 && ret != -ENOIOCTLCMD) | |
309 | return -EPIPE; | |
310 | ||
311 | /* Update the maximum frame rate */ | |
312 | if (subdev == &isp->isp_res.subdev) | |
313 | omap3isp_resizer_max_rate(&isp->isp_res, | |
314 | &pipe->max_rate); | |
315 | ||
316 | /* Check ccdc maximum data rate when data comes from sensor | |
317 | * TODO: Include ccdc rate in pipe->max_rate and compare the | |
318 | * total pipe rate with the input data rate from sensor. | |
319 | */ | |
320 | if (subdev == &isp->isp_ccdc.subdev && pipe->input == NULL) { | |
321 | unsigned int rate = UINT_MAX; | |
322 | ||
323 | omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate); | |
324 | if (isp->isp_ccdc.vpcfg.pixelclk > rate) | |
325 | return -ENOSPC; | |
326 | } | |
327 | ||
c09af044 MJ |
328 | /* If sink pad is on CCDC, the link has the lane shifter |
329 | * in the middle of it. */ | |
330 | shifter_link = subdev == &isp->isp_ccdc.subdev; | |
331 | ||
ad614acb LP |
332 | /* Retrieve the source format */ |
333 | pad = media_entity_remote_source(pad); | |
334 | if (pad == NULL || | |
335 | media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) | |
336 | break; | |
337 | ||
338 | subdev = media_entity_to_v4l2_subdev(pad->entity); | |
339 | ||
340 | fmt_source.pad = pad->index; | |
341 | fmt_source.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
342 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_source); | |
343 | if (ret < 0 && ret != -ENOIOCTLCMD) | |
344 | return -EPIPE; | |
345 | ||
346 | /* Check if the two ends match */ | |
c09af044 | 347 | if (fmt_source.format.width != fmt_sink.format.width || |
ad614acb LP |
348 | fmt_source.format.height != fmt_sink.format.height) |
349 | return -EPIPE; | |
c09af044 MJ |
350 | |
351 | if (shifter_link) { | |
352 | unsigned int parallel_shift = 0; | |
353 | if (isp->isp_ccdc.input == CCDC_INPUT_PARALLEL) { | |
354 | struct isp_parallel_platform_data *pdata = | |
355 | &((struct isp_v4l2_subdevs_group *) | |
356 | subdev->host_priv)->bus.parallel; | |
357 | parallel_shift = pdata->data_lane_shift * 2; | |
358 | } | |
359 | if (!isp_video_is_shiftable(fmt_source.format.code, | |
360 | fmt_sink.format.code, | |
361 | parallel_shift)) | |
362 | return -EPIPE; | |
363 | } else if (fmt_source.format.code != fmt_sink.format.code) | |
364 | return -EPIPE; | |
ad614acb LP |
365 | } |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | static int | |
371 | __isp_video_get_format(struct isp_video *video, struct v4l2_format *format) | |
372 | { | |
373 | struct v4l2_subdev_format fmt; | |
374 | struct v4l2_subdev *subdev; | |
375 | u32 pad; | |
376 | int ret; | |
377 | ||
378 | subdev = isp_video_remote_subdev(video, &pad); | |
379 | if (subdev == NULL) | |
380 | return -EINVAL; | |
381 | ||
382 | mutex_lock(&video->mutex); | |
383 | ||
384 | fmt.pad = pad; | |
385 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
386 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
387 | if (ret == -ENOIOCTLCMD) | |
388 | ret = -EINVAL; | |
389 | ||
390 | mutex_unlock(&video->mutex); | |
391 | ||
392 | if (ret) | |
393 | return ret; | |
394 | ||
395 | format->type = video->type; | |
396 | return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); | |
397 | } | |
398 | ||
399 | static int | |
400 | isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh) | |
401 | { | |
402 | struct v4l2_format format; | |
403 | int ret; | |
404 | ||
405 | memcpy(&format, &vfh->format, sizeof(format)); | |
406 | ret = __isp_video_get_format(video, &format); | |
407 | if (ret < 0) | |
408 | return ret; | |
409 | ||
410 | if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat || | |
411 | vfh->format.fmt.pix.height != format.fmt.pix.height || | |
412 | vfh->format.fmt.pix.width != format.fmt.pix.width || | |
413 | vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline || | |
414 | vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage) | |
415 | return -EINVAL; | |
416 | ||
417 | return ret; | |
418 | } | |
419 | ||
420 | /* ----------------------------------------------------------------------------- | |
421 | * IOMMU management | |
422 | */ | |
423 | ||
424 | #define IOMMU_FLAG (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8) | |
425 | ||
426 | /* | |
427 | * ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list | |
428 | * @dev: Device pointer specific to the OMAP3 ISP. | |
429 | * @sglist: Pointer to source Scatter gather list to allocate. | |
430 | * @sglen: Number of elements of the scatter-gatter list. | |
431 | * | |
432 | * Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if | |
433 | * we ran out of memory. | |
434 | */ | |
435 | static dma_addr_t | |
436 | ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen) | |
437 | { | |
438 | struct sg_table *sgt; | |
439 | u32 da; | |
440 | ||
441 | sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); | |
442 | if (sgt == NULL) | |
443 | return -ENOMEM; | |
444 | ||
445 | sgt->sgl = (struct scatterlist *)sglist; | |
446 | sgt->nents = sglen; | |
447 | sgt->orig_nents = sglen; | |
448 | ||
f626b52d | 449 | da = iommu_vmap(isp->domain, isp->iommu, 0, sgt, IOMMU_FLAG); |
ad614acb LP |
450 | if (IS_ERR_VALUE(da)) |
451 | kfree(sgt); | |
452 | ||
453 | return da; | |
454 | } | |
455 | ||
456 | /* | |
457 | * ispmmu_vunmap - Unmap a device address from the ISP MMU | |
458 | * @dev: Device pointer specific to the OMAP3 ISP. | |
459 | * @da: Device address generated from a ispmmu_vmap call. | |
460 | */ | |
461 | static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da) | |
462 | { | |
463 | struct sg_table *sgt; | |
464 | ||
f626b52d | 465 | sgt = iommu_vunmap(isp->domain, isp->iommu, (u32)da); |
ad614acb LP |
466 | kfree(sgt); |
467 | } | |
468 | ||
469 | /* ----------------------------------------------------------------------------- | |
470 | * Video queue operations | |
471 | */ | |
472 | ||
473 | static void isp_video_queue_prepare(struct isp_video_queue *queue, | |
474 | unsigned int *nbuffers, unsigned int *size) | |
475 | { | |
476 | struct isp_video_fh *vfh = | |
477 | container_of(queue, struct isp_video_fh, queue); | |
478 | struct isp_video *video = vfh->video; | |
479 | ||
480 | *size = vfh->format.fmt.pix.sizeimage; | |
481 | if (*size == 0) | |
482 | return; | |
483 | ||
484 | *nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size)); | |
485 | } | |
486 | ||
487 | static void isp_video_buffer_cleanup(struct isp_video_buffer *buf) | |
488 | { | |
489 | struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue); | |
490 | struct isp_buffer *buffer = to_isp_buffer(buf); | |
491 | struct isp_video *video = vfh->video; | |
492 | ||
493 | if (buffer->isp_addr) { | |
494 | ispmmu_vunmap(video->isp, buffer->isp_addr); | |
495 | buffer->isp_addr = 0; | |
496 | } | |
497 | } | |
498 | ||
499 | static int isp_video_buffer_prepare(struct isp_video_buffer *buf) | |
500 | { | |
501 | struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue); | |
502 | struct isp_buffer *buffer = to_isp_buffer(buf); | |
503 | struct isp_video *video = vfh->video; | |
504 | unsigned long addr; | |
505 | ||
506 | addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen); | |
507 | if (IS_ERR_VALUE(addr)) | |
508 | return -EIO; | |
509 | ||
510 | if (!IS_ALIGNED(addr, 32)) { | |
511 | dev_dbg(video->isp->dev, "Buffer address must be " | |
512 | "aligned to 32 bytes boundary.\n"); | |
513 | ispmmu_vunmap(video->isp, buffer->isp_addr); | |
514 | return -EINVAL; | |
515 | } | |
516 | ||
517 | buf->vbuf.bytesused = vfh->format.fmt.pix.sizeimage; | |
518 | buffer->isp_addr = addr; | |
519 | return 0; | |
520 | } | |
521 | ||
522 | /* | |
523 | * isp_video_buffer_queue - Add buffer to streaming queue | |
524 | * @buf: Video buffer | |
525 | * | |
526 | * In memory-to-memory mode, start streaming on the pipeline if buffers are | |
527 | * queued on both the input and the output, if the pipeline isn't already busy. | |
528 | * If the pipeline is busy, it will be restarted in the output module interrupt | |
529 | * handler. | |
530 | */ | |
531 | static void isp_video_buffer_queue(struct isp_video_buffer *buf) | |
532 | { | |
533 | struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue); | |
534 | struct isp_buffer *buffer = to_isp_buffer(buf); | |
535 | struct isp_video *video = vfh->video; | |
536 | struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); | |
537 | enum isp_pipeline_state state; | |
538 | unsigned long flags; | |
539 | unsigned int empty; | |
540 | unsigned int start; | |
541 | ||
542 | empty = list_empty(&video->dmaqueue); | |
543 | list_add_tail(&buffer->buffer.irqlist, &video->dmaqueue); | |
544 | ||
545 | if (empty) { | |
546 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
547 | state = ISP_PIPELINE_QUEUE_OUTPUT; | |
548 | else | |
549 | state = ISP_PIPELINE_QUEUE_INPUT; | |
550 | ||
551 | spin_lock_irqsave(&pipe->lock, flags); | |
552 | pipe->state |= state; | |
553 | video->ops->queue(video, buffer); | |
554 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; | |
555 | ||
556 | start = isp_pipeline_ready(pipe); | |
557 | if (start) | |
558 | pipe->state |= ISP_PIPELINE_STREAM; | |
559 | spin_unlock_irqrestore(&pipe->lock, flags); | |
560 | ||
561 | if (start) | |
562 | omap3isp_pipeline_set_stream(pipe, | |
563 | ISP_PIPELINE_STREAM_SINGLESHOT); | |
564 | } | |
565 | } | |
566 | ||
567 | static const struct isp_video_queue_operations isp_video_queue_ops = { | |
568 | .queue_prepare = &isp_video_queue_prepare, | |
569 | .buffer_prepare = &isp_video_buffer_prepare, | |
570 | .buffer_queue = &isp_video_buffer_queue, | |
571 | .buffer_cleanup = &isp_video_buffer_cleanup, | |
572 | }; | |
573 | ||
574 | /* | |
575 | * omap3isp_video_buffer_next - Complete the current buffer and return the next | |
576 | * @video: ISP video object | |
25985edc | 577 | * @error: Whether an error occurred during capture |
ad614acb LP |
578 | * |
579 | * Remove the current video buffer from the DMA queue and fill its timestamp, | |
580 | * field count and state fields before waking up its completion handler. | |
581 | * | |
25985edc | 582 | * The buffer state is set to VIDEOBUF_DONE if no error occurred (@error is 0) |
ad614acb LP |
583 | * or VIDEOBUF_ERROR otherwise (@error is non-zero). |
584 | * | |
585 | * The DMA queue is expected to contain at least one buffer. | |
586 | * | |
587 | * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is | |
588 | * empty. | |
589 | */ | |
590 | struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video, | |
591 | unsigned int error) | |
592 | { | |
593 | struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); | |
594 | struct isp_video_queue *queue = video->queue; | |
595 | enum isp_pipeline_state state; | |
596 | struct isp_video_buffer *buf; | |
597 | unsigned long flags; | |
598 | struct timespec ts; | |
599 | ||
600 | spin_lock_irqsave(&queue->irqlock, flags); | |
601 | if (WARN_ON(list_empty(&video->dmaqueue))) { | |
602 | spin_unlock_irqrestore(&queue->irqlock, flags); | |
603 | return NULL; | |
604 | } | |
605 | ||
606 | buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer, | |
607 | irqlist); | |
608 | list_del(&buf->irqlist); | |
609 | spin_unlock_irqrestore(&queue->irqlock, flags); | |
610 | ||
611 | ktime_get_ts(&ts); | |
612 | buf->vbuf.timestamp.tv_sec = ts.tv_sec; | |
613 | buf->vbuf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
614 | ||
615 | /* Do frame number propagation only if this is the output video node. | |
616 | * Frame number either comes from the CSI receivers or it gets | |
617 | * incremented here if H3A is not active. | |
618 | * Note: There is no guarantee that the output buffer will finish | |
619 | * first, so the input number might lag behind by 1 in some cases. | |
620 | */ | |
621 | if (video == pipe->output && !pipe->do_propagation) | |
622 | buf->vbuf.sequence = atomic_inc_return(&pipe->frame_number); | |
623 | else | |
624 | buf->vbuf.sequence = atomic_read(&pipe->frame_number); | |
625 | ||
626 | buf->state = error ? ISP_BUF_STATE_ERROR : ISP_BUF_STATE_DONE; | |
627 | ||
628 | wake_up(&buf->wait); | |
629 | ||
630 | if (list_empty(&video->dmaqueue)) { | |
631 | if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
632 | state = ISP_PIPELINE_QUEUE_OUTPUT | |
633 | | ISP_PIPELINE_STREAM; | |
634 | else | |
635 | state = ISP_PIPELINE_QUEUE_INPUT | |
636 | | ISP_PIPELINE_STREAM; | |
637 | ||
638 | spin_lock_irqsave(&pipe->lock, flags); | |
639 | pipe->state &= ~state; | |
640 | if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS) | |
641 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; | |
642 | spin_unlock_irqrestore(&pipe->lock, flags); | |
643 | return NULL; | |
644 | } | |
645 | ||
646 | if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { | |
647 | spin_lock_irqsave(&pipe->lock, flags); | |
648 | pipe->state &= ~ISP_PIPELINE_STREAM; | |
649 | spin_unlock_irqrestore(&pipe->lock, flags); | |
650 | } | |
651 | ||
652 | buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer, | |
653 | irqlist); | |
654 | buf->state = ISP_BUF_STATE_ACTIVE; | |
655 | return to_isp_buffer(buf); | |
656 | } | |
657 | ||
658 | /* | |
659 | * omap3isp_video_resume - Perform resume operation on the buffers | |
660 | * @video: ISP video object | |
25985edc | 661 | * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise |
ad614acb LP |
662 | * |
663 | * This function is intended to be used on suspend/resume scenario. It | |
664 | * requests video queue layer to discard buffers marked as DONE if it's in | |
665 | * continuous mode and requests ISP modules to queue again the ACTIVE buffer | |
666 | * if there's any. | |
667 | */ | |
668 | void omap3isp_video_resume(struct isp_video *video, int continuous) | |
669 | { | |
670 | struct isp_buffer *buf = NULL; | |
671 | ||
672 | if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
673 | omap3isp_video_queue_discard_done(video->queue); | |
674 | ||
675 | if (!list_empty(&video->dmaqueue)) { | |
676 | buf = list_first_entry(&video->dmaqueue, | |
677 | struct isp_buffer, buffer.irqlist); | |
678 | video->ops->queue(video, buf); | |
679 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; | |
680 | } else { | |
681 | if (continuous) | |
682 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; | |
683 | } | |
684 | } | |
685 | ||
686 | /* ----------------------------------------------------------------------------- | |
687 | * V4L2 ioctls | |
688 | */ | |
689 | ||
690 | static int | |
691 | isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) | |
692 | { | |
693 | struct isp_video *video = video_drvdata(file); | |
694 | ||
695 | strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver)); | |
696 | strlcpy(cap->card, video->video.name, sizeof(cap->card)); | |
697 | strlcpy(cap->bus_info, "media", sizeof(cap->bus_info)); | |
ad614acb LP |
698 | |
699 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
700 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
701 | else | |
702 | cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
707 | static int | |
708 | isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format) | |
709 | { | |
710 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
711 | struct isp_video *video = video_drvdata(file); | |
712 | ||
713 | if (format->type != video->type) | |
714 | return -EINVAL; | |
715 | ||
716 | mutex_lock(&video->mutex); | |
717 | *format = vfh->format; | |
718 | mutex_unlock(&video->mutex); | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | static int | |
724 | isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format) | |
725 | { | |
726 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
727 | struct isp_video *video = video_drvdata(file); | |
728 | struct v4l2_mbus_framefmt fmt; | |
729 | ||
730 | if (format->type != video->type) | |
731 | return -EINVAL; | |
732 | ||
733 | mutex_lock(&video->mutex); | |
734 | ||
735 | /* Fill the bytesperline and sizeimage fields by converting to media bus | |
736 | * format and back to pixel format. | |
737 | */ | |
738 | isp_video_pix_to_mbus(&format->fmt.pix, &fmt); | |
739 | isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix); | |
740 | ||
741 | vfh->format = *format; | |
742 | ||
743 | mutex_unlock(&video->mutex); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | static int | |
748 | isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format) | |
749 | { | |
750 | struct isp_video *video = video_drvdata(file); | |
751 | struct v4l2_subdev_format fmt; | |
752 | struct v4l2_subdev *subdev; | |
753 | u32 pad; | |
754 | int ret; | |
755 | ||
756 | if (format->type != video->type) | |
757 | return -EINVAL; | |
758 | ||
759 | subdev = isp_video_remote_subdev(video, &pad); | |
760 | if (subdev == NULL) | |
761 | return -EINVAL; | |
762 | ||
763 | isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format); | |
764 | ||
765 | fmt.pad = pad; | |
766 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
767 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
768 | if (ret) | |
769 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
770 | ||
771 | isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); | |
772 | return 0; | |
773 | } | |
774 | ||
775 | static int | |
776 | isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap) | |
777 | { | |
778 | struct isp_video *video = video_drvdata(file); | |
779 | struct v4l2_subdev *subdev; | |
780 | int ret; | |
781 | ||
782 | subdev = isp_video_remote_subdev(video, NULL); | |
783 | if (subdev == NULL) | |
784 | return -EINVAL; | |
785 | ||
786 | mutex_lock(&video->mutex); | |
787 | ret = v4l2_subdev_call(subdev, video, cropcap, cropcap); | |
788 | mutex_unlock(&video->mutex); | |
789 | ||
790 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
791 | } | |
792 | ||
793 | static int | |
794 | isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop) | |
795 | { | |
796 | struct isp_video *video = video_drvdata(file); | |
797 | struct v4l2_subdev_format format; | |
798 | struct v4l2_subdev *subdev; | |
799 | u32 pad; | |
800 | int ret; | |
801 | ||
802 | subdev = isp_video_remote_subdev(video, &pad); | |
803 | if (subdev == NULL) | |
804 | return -EINVAL; | |
805 | ||
806 | /* Try the get crop operation first and fallback to get format if not | |
807 | * implemented. | |
808 | */ | |
809 | ret = v4l2_subdev_call(subdev, video, g_crop, crop); | |
810 | if (ret != -ENOIOCTLCMD) | |
811 | return ret; | |
812 | ||
813 | format.pad = pad; | |
814 | format.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
815 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format); | |
816 | if (ret < 0) | |
817 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
818 | ||
819 | crop->c.left = 0; | |
820 | crop->c.top = 0; | |
821 | crop->c.width = format.format.width; | |
822 | crop->c.height = format.format.height; | |
823 | ||
824 | return 0; | |
825 | } | |
826 | ||
827 | static int | |
828 | isp_video_set_crop(struct file *file, void *fh, struct v4l2_crop *crop) | |
829 | { | |
830 | struct isp_video *video = video_drvdata(file); | |
831 | struct v4l2_subdev *subdev; | |
832 | int ret; | |
833 | ||
834 | subdev = isp_video_remote_subdev(video, NULL); | |
835 | if (subdev == NULL) | |
836 | return -EINVAL; | |
837 | ||
838 | mutex_lock(&video->mutex); | |
839 | ret = v4l2_subdev_call(subdev, video, s_crop, crop); | |
840 | mutex_unlock(&video->mutex); | |
841 | ||
842 | return ret == -ENOIOCTLCMD ? -EINVAL : ret; | |
843 | } | |
844 | ||
845 | static int | |
846 | isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
847 | { | |
848 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
849 | struct isp_video *video = video_drvdata(file); | |
850 | ||
851 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
852 | video->type != a->type) | |
853 | return -EINVAL; | |
854 | ||
855 | memset(a, 0, sizeof(*a)); | |
856 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
857 | a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; | |
858 | a->parm.output.timeperframe = vfh->timeperframe; | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | static int | |
864 | isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
865 | { | |
866 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
867 | struct isp_video *video = video_drvdata(file); | |
868 | ||
869 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
870 | video->type != a->type) | |
871 | return -EINVAL; | |
872 | ||
873 | if (a->parm.output.timeperframe.denominator == 0) | |
874 | a->parm.output.timeperframe.denominator = 1; | |
875 | ||
876 | vfh->timeperframe = a->parm.output.timeperframe; | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
881 | static int | |
882 | isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) | |
883 | { | |
884 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
885 | ||
886 | return omap3isp_video_queue_reqbufs(&vfh->queue, rb); | |
887 | } | |
888 | ||
889 | static int | |
890 | isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
891 | { | |
892 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
893 | ||
894 | return omap3isp_video_queue_querybuf(&vfh->queue, b); | |
895 | } | |
896 | ||
897 | static int | |
898 | isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
899 | { | |
900 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
901 | ||
902 | return omap3isp_video_queue_qbuf(&vfh->queue, b); | |
903 | } | |
904 | ||
905 | static int | |
906 | isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
907 | { | |
908 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
909 | ||
910 | return omap3isp_video_queue_dqbuf(&vfh->queue, b, | |
911 | file->f_flags & O_NONBLOCK); | |
912 | } | |
913 | ||
914 | /* | |
915 | * Stream management | |
916 | * | |
917 | * Every ISP pipeline has a single input and a single output. The input can be | |
918 | * either a sensor or a video node. The output is always a video node. | |
919 | * | |
920 | * As every pipeline has an output video node, the ISP video objects at the | |
921 | * pipeline output stores the pipeline state. It tracks the streaming state of | |
922 | * both the input and output, as well as the availability of buffers. | |
923 | * | |
924 | * In sensor-to-memory mode, frames are always available at the pipeline input. | |
925 | * Starting the sensor usually requires I2C transfers and must be done in | |
926 | * interruptible context. The pipeline is started and stopped synchronously | |
927 | * to the stream on/off commands. All modules in the pipeline will get their | |
928 | * subdev set stream handler called. The module at the end of the pipeline must | |
929 | * delay starting the hardware until buffers are available at its output. | |
930 | * | |
931 | * In memory-to-memory mode, starting/stopping the stream requires | |
932 | * synchronization between the input and output. ISP modules can't be stopped | |
933 | * in the middle of a frame, and at least some of the modules seem to become | |
934 | * busy as soon as they're started, even if they don't receive a frame start | |
935 | * event. For that reason frames need to be processed in single-shot mode. The | |
936 | * driver needs to wait until a frame is completely processed and written to | |
937 | * memory before restarting the pipeline for the next frame. Pipelined | |
938 | * processing might be possible but requires more testing. | |
939 | * | |
940 | * Stream start must be delayed until buffers are available at both the input | |
941 | * and output. The pipeline must be started in the videobuf queue callback with | |
942 | * the buffers queue spinlock held. The modules subdev set stream operation must | |
943 | * not sleep. | |
944 | */ | |
945 | static int | |
946 | isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) | |
947 | { | |
948 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
949 | struct isp_video *video = video_drvdata(file); | |
950 | enum isp_pipeline_state state; | |
951 | struct isp_pipeline *pipe; | |
952 | struct isp_video *far_end; | |
953 | unsigned long flags; | |
954 | int ret; | |
955 | ||
956 | if (type != video->type) | |
957 | return -EINVAL; | |
958 | ||
959 | mutex_lock(&video->stream_lock); | |
960 | ||
961 | if (video->streaming) { | |
962 | mutex_unlock(&video->stream_lock); | |
963 | return -EBUSY; | |
964 | } | |
965 | ||
966 | /* Start streaming on the pipeline. No link touching an entity in the | |
967 | * pipeline can be activated or deactivated once streaming is started. | |
968 | */ | |
969 | pipe = video->video.entity.pipe | |
970 | ? to_isp_pipeline(&video->video.entity) : &video->pipe; | |
971 | media_entity_pipeline_start(&video->video.entity, &pipe->pipe); | |
972 | ||
973 | /* Verify that the currently configured format matches the output of | |
974 | * the connected subdev. | |
975 | */ | |
976 | ret = isp_video_check_format(video, vfh); | |
977 | if (ret < 0) | |
978 | goto error; | |
979 | ||
980 | video->bpl_padding = ret; | |
981 | video->bpl_value = vfh->format.fmt.pix.bytesperline; | |
982 | ||
983 | /* Find the ISP video node connected at the far end of the pipeline and | |
984 | * update the pipeline. | |
985 | */ | |
986 | far_end = isp_video_far_end(video); | |
987 | ||
988 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
989 | state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT; | |
990 | pipe->input = far_end; | |
991 | pipe->output = video; | |
992 | } else { | |
993 | if (far_end == NULL) { | |
994 | ret = -EPIPE; | |
995 | goto error; | |
996 | } | |
997 | ||
998 | state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT; | |
999 | pipe->input = video; | |
1000 | pipe->output = far_end; | |
1001 | } | |
1002 | ||
4b0ec19e LP |
1003 | if (video->isp->pdata->set_constraints) |
1004 | video->isp->pdata->set_constraints(video->isp, true); | |
ad614acb LP |
1005 | pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]); |
1006 | ||
1007 | /* Validate the pipeline and update its state. */ | |
1008 | ret = isp_video_validate_pipeline(pipe); | |
1009 | if (ret < 0) | |
1010 | goto error; | |
1011 | ||
1012 | spin_lock_irqsave(&pipe->lock, flags); | |
1013 | pipe->state &= ~ISP_PIPELINE_STREAM; | |
1014 | pipe->state |= state; | |
1015 | spin_unlock_irqrestore(&pipe->lock, flags); | |
1016 | ||
1017 | /* Set the maximum time per frame as the value requested by userspace. | |
1018 | * This is a soft limit that can be overridden if the hardware doesn't | |
1019 | * support the request limit. | |
1020 | */ | |
1021 | if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) | |
1022 | pipe->max_timeperframe = vfh->timeperframe; | |
1023 | ||
1024 | video->queue = &vfh->queue; | |
1025 | INIT_LIST_HEAD(&video->dmaqueue); | |
1026 | atomic_set(&pipe->frame_number, -1); | |
1027 | ||
1028 | ret = omap3isp_video_queue_streamon(&vfh->queue); | |
1029 | if (ret < 0) | |
1030 | goto error; | |
1031 | ||
1032 | /* In sensor-to-memory mode, the stream can be started synchronously | |
1033 | * to the stream on command. In memory-to-memory mode, it will be | |
1034 | * started when buffers are queued on both the input and output. | |
1035 | */ | |
1036 | if (pipe->input == NULL) { | |
1037 | ret = omap3isp_pipeline_set_stream(pipe, | |
1038 | ISP_PIPELINE_STREAM_CONTINUOUS); | |
1039 | if (ret < 0) | |
1040 | goto error; | |
1041 | spin_lock_irqsave(&video->queue->irqlock, flags); | |
1042 | if (list_empty(&video->dmaqueue)) | |
1043 | video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; | |
1044 | spin_unlock_irqrestore(&video->queue->irqlock, flags); | |
1045 | } | |
1046 | ||
1047 | error: | |
1048 | if (ret < 0) { | |
1049 | omap3isp_video_queue_streamoff(&vfh->queue); | |
4b0ec19e LP |
1050 | if (video->isp->pdata->set_constraints) |
1051 | video->isp->pdata->set_constraints(video->isp, false); | |
ad614acb LP |
1052 | media_entity_pipeline_stop(&video->video.entity); |
1053 | video->queue = NULL; | |
1054 | } | |
1055 | ||
1056 | if (!ret) | |
1057 | video->streaming = 1; | |
1058 | ||
1059 | mutex_unlock(&video->stream_lock); | |
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | static int | |
1064 | isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) | |
1065 | { | |
1066 | struct isp_video_fh *vfh = to_isp_video_fh(fh); | |
1067 | struct isp_video *video = video_drvdata(file); | |
1068 | struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); | |
1069 | enum isp_pipeline_state state; | |
1070 | unsigned int streaming; | |
1071 | unsigned long flags; | |
1072 | ||
1073 | if (type != video->type) | |
1074 | return -EINVAL; | |
1075 | ||
1076 | mutex_lock(&video->stream_lock); | |
1077 | ||
1078 | /* Make sure we're not streaming yet. */ | |
1079 | mutex_lock(&vfh->queue.lock); | |
1080 | streaming = vfh->queue.streaming; | |
1081 | mutex_unlock(&vfh->queue.lock); | |
1082 | ||
1083 | if (!streaming) | |
1084 | goto done; | |
1085 | ||
1086 | /* Update the pipeline state. */ | |
1087 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1088 | state = ISP_PIPELINE_STREAM_OUTPUT | |
1089 | | ISP_PIPELINE_QUEUE_OUTPUT; | |
1090 | else | |
1091 | state = ISP_PIPELINE_STREAM_INPUT | |
1092 | | ISP_PIPELINE_QUEUE_INPUT; | |
1093 | ||
1094 | spin_lock_irqsave(&pipe->lock, flags); | |
1095 | pipe->state &= ~state; | |
1096 | spin_unlock_irqrestore(&pipe->lock, flags); | |
1097 | ||
1098 | /* Stop the stream. */ | |
1099 | omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED); | |
1100 | omap3isp_video_queue_streamoff(&vfh->queue); | |
1101 | video->queue = NULL; | |
1102 | video->streaming = 0; | |
1103 | ||
4b0ec19e LP |
1104 | if (video->isp->pdata->set_constraints) |
1105 | video->isp->pdata->set_constraints(video->isp, false); | |
ad614acb LP |
1106 | media_entity_pipeline_stop(&video->video.entity); |
1107 | ||
1108 | done: | |
1109 | mutex_unlock(&video->stream_lock); | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | static int | |
1114 | isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) | |
1115 | { | |
1116 | if (input->index > 0) | |
1117 | return -EINVAL; | |
1118 | ||
1119 | strlcpy(input->name, "camera", sizeof(input->name)); | |
1120 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1121 | ||
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | static int | |
1126 | isp_video_g_input(struct file *file, void *fh, unsigned int *input) | |
1127 | { | |
1128 | *input = 0; | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | static int | |
1134 | isp_video_s_input(struct file *file, void *fh, unsigned int input) | |
1135 | { | |
1136 | return input == 0 ? 0 : -EINVAL; | |
1137 | } | |
1138 | ||
1139 | static const struct v4l2_ioctl_ops isp_video_ioctl_ops = { | |
1140 | .vidioc_querycap = isp_video_querycap, | |
1141 | .vidioc_g_fmt_vid_cap = isp_video_get_format, | |
1142 | .vidioc_s_fmt_vid_cap = isp_video_set_format, | |
1143 | .vidioc_try_fmt_vid_cap = isp_video_try_format, | |
1144 | .vidioc_g_fmt_vid_out = isp_video_get_format, | |
1145 | .vidioc_s_fmt_vid_out = isp_video_set_format, | |
1146 | .vidioc_try_fmt_vid_out = isp_video_try_format, | |
1147 | .vidioc_cropcap = isp_video_cropcap, | |
1148 | .vidioc_g_crop = isp_video_get_crop, | |
1149 | .vidioc_s_crop = isp_video_set_crop, | |
1150 | .vidioc_g_parm = isp_video_get_param, | |
1151 | .vidioc_s_parm = isp_video_set_param, | |
1152 | .vidioc_reqbufs = isp_video_reqbufs, | |
1153 | .vidioc_querybuf = isp_video_querybuf, | |
1154 | .vidioc_qbuf = isp_video_qbuf, | |
1155 | .vidioc_dqbuf = isp_video_dqbuf, | |
1156 | .vidioc_streamon = isp_video_streamon, | |
1157 | .vidioc_streamoff = isp_video_streamoff, | |
1158 | .vidioc_enum_input = isp_video_enum_input, | |
1159 | .vidioc_g_input = isp_video_g_input, | |
1160 | .vidioc_s_input = isp_video_s_input, | |
1161 | }; | |
1162 | ||
1163 | /* ----------------------------------------------------------------------------- | |
1164 | * V4L2 file operations | |
1165 | */ | |
1166 | ||
1167 | static int isp_video_open(struct file *file) | |
1168 | { | |
1169 | struct isp_video *video = video_drvdata(file); | |
1170 | struct isp_video_fh *handle; | |
1171 | int ret = 0; | |
1172 | ||
1173 | handle = kzalloc(sizeof(*handle), GFP_KERNEL); | |
1174 | if (handle == NULL) | |
1175 | return -ENOMEM; | |
1176 | ||
1177 | v4l2_fh_init(&handle->vfh, &video->video); | |
1178 | v4l2_fh_add(&handle->vfh); | |
1179 | ||
1180 | /* If this is the first user, initialise the pipeline. */ | |
1181 | if (omap3isp_get(video->isp) == NULL) { | |
1182 | ret = -EBUSY; | |
1183 | goto done; | |
1184 | } | |
1185 | ||
1186 | ret = omap3isp_pipeline_pm_use(&video->video.entity, 1); | |
1187 | if (ret < 0) { | |
1188 | omap3isp_put(video->isp); | |
1189 | goto done; | |
1190 | } | |
1191 | ||
1192 | omap3isp_video_queue_init(&handle->queue, video->type, | |
1193 | &isp_video_queue_ops, video->isp->dev, | |
1194 | sizeof(struct isp_buffer)); | |
1195 | ||
1196 | memset(&handle->format, 0, sizeof(handle->format)); | |
1197 | handle->format.type = video->type; | |
1198 | handle->timeperframe.denominator = 1; | |
1199 | ||
1200 | handle->video = video; | |
1201 | file->private_data = &handle->vfh; | |
1202 | ||
1203 | done: | |
1204 | if (ret < 0) { | |
1205 | v4l2_fh_del(&handle->vfh); | |
1206 | kfree(handle); | |
1207 | } | |
1208 | ||
1209 | return ret; | |
1210 | } | |
1211 | ||
1212 | static int isp_video_release(struct file *file) | |
1213 | { | |
1214 | struct isp_video *video = video_drvdata(file); | |
1215 | struct v4l2_fh *vfh = file->private_data; | |
1216 | struct isp_video_fh *handle = to_isp_video_fh(vfh); | |
1217 | ||
1218 | /* Disable streaming and free the buffers queue resources. */ | |
1219 | isp_video_streamoff(file, vfh, video->type); | |
1220 | ||
1221 | mutex_lock(&handle->queue.lock); | |
1222 | omap3isp_video_queue_cleanup(&handle->queue); | |
1223 | mutex_unlock(&handle->queue.lock); | |
1224 | ||
1225 | omap3isp_pipeline_pm_use(&video->video.entity, 0); | |
1226 | ||
1227 | /* Release the file handle. */ | |
1228 | v4l2_fh_del(vfh); | |
1229 | kfree(handle); | |
1230 | file->private_data = NULL; | |
1231 | ||
1232 | omap3isp_put(video->isp); | |
1233 | ||
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | static unsigned int isp_video_poll(struct file *file, poll_table *wait) | |
1238 | { | |
1239 | struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); | |
1240 | struct isp_video_queue *queue = &vfh->queue; | |
1241 | ||
1242 | return omap3isp_video_queue_poll(queue, file, wait); | |
1243 | } | |
1244 | ||
1245 | static int isp_video_mmap(struct file *file, struct vm_area_struct *vma) | |
1246 | { | |
1247 | struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); | |
1248 | ||
1249 | return omap3isp_video_queue_mmap(&vfh->queue, vma); | |
1250 | } | |
1251 | ||
1252 | static struct v4l2_file_operations isp_video_fops = { | |
1253 | .owner = THIS_MODULE, | |
1254 | .unlocked_ioctl = video_ioctl2, | |
1255 | .open = isp_video_open, | |
1256 | .release = isp_video_release, | |
1257 | .poll = isp_video_poll, | |
1258 | .mmap = isp_video_mmap, | |
1259 | }; | |
1260 | ||
1261 | /* ----------------------------------------------------------------------------- | |
1262 | * ISP video core | |
1263 | */ | |
1264 | ||
1265 | static const struct isp_video_operations isp_video_dummy_ops = { | |
1266 | }; | |
1267 | ||
1268 | int omap3isp_video_init(struct isp_video *video, const char *name) | |
1269 | { | |
1270 | const char *direction; | |
1271 | int ret; | |
1272 | ||
1273 | switch (video->type) { | |
1274 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
1275 | direction = "output"; | |
1276 | video->pad.flags = MEDIA_PAD_FL_SINK; | |
1277 | break; | |
1278 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: | |
1279 | direction = "input"; | |
1280 | video->pad.flags = MEDIA_PAD_FL_SOURCE; | |
1281 | break; | |
1282 | ||
1283 | default: | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | ||
1287 | ret = media_entity_init(&video->video.entity, 1, &video->pad, 0); | |
1288 | if (ret < 0) | |
1289 | return ret; | |
1290 | ||
1291 | mutex_init(&video->mutex); | |
1292 | atomic_set(&video->active, 0); | |
1293 | ||
1294 | spin_lock_init(&video->pipe.lock); | |
1295 | mutex_init(&video->stream_lock); | |
1296 | ||
1297 | /* Initialize the video device. */ | |
1298 | if (video->ops == NULL) | |
1299 | video->ops = &isp_video_dummy_ops; | |
1300 | ||
1301 | video->video.fops = &isp_video_fops; | |
1302 | snprintf(video->video.name, sizeof(video->video.name), | |
1303 | "OMAP3 ISP %s %s", name, direction); | |
1304 | video->video.vfl_type = VFL_TYPE_GRABBER; | |
1305 | video->video.release = video_device_release_empty; | |
1306 | video->video.ioctl_ops = &isp_video_ioctl_ops; | |
1307 | video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED; | |
1308 | ||
1309 | video_set_drvdata(&video->video, video); | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev) | |
1315 | { | |
1316 | int ret; | |
1317 | ||
1318 | video->video.v4l2_dev = vdev; | |
1319 | ||
1320 | ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); | |
1321 | if (ret < 0) | |
1322 | printk(KERN_ERR "%s: could not register video device (%d)\n", | |
1323 | __func__, ret); | |
1324 | ||
1325 | return ret; | |
1326 | } | |
1327 | ||
1328 | void omap3isp_video_unregister(struct isp_video *video) | |
1329 | { | |
1330 | if (video_is_registered(&video->video)) { | |
1331 | media_entity_cleanup(&video->video.entity); | |
1332 | video_unregister_device(&video->video); | |
1333 | } | |
1334 | } |