]>
Commit | Line | Data |
---|---|---|
fc96d58c SA |
1 | /* |
2 | * TI OMAP4 ISS V4L2 Driver - Generic video node | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments, Inc. | |
5 | * | |
6 | * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <asm/cacheflush.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/pagemap.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/module.h> | |
a288b78b | 22 | |
fc96d58c SA |
23 | #include <media/v4l2-dev.h> |
24 | #include <media/v4l2-ioctl.h> | |
a288b78b | 25 | #include <media/v4l2-mc.h> |
fc96d58c SA |
26 | |
27 | #include "iss_video.h" | |
28 | #include "iss.h" | |
29 | ||
fc96d58c SA |
30 | /* ----------------------------------------------------------------------------- |
31 | * Helper functions | |
32 | */ | |
33 | ||
34 | static struct iss_format_info formats[] = { | |
3336f07a BB |
35 | { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, |
36 | MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, | |
a1d4eab0 | 37 | V4L2_PIX_FMT_GREY, 8, "Greyscale 8 bpp", }, |
3336f07a BB |
38 | { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10, |
39 | MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8, | |
a1d4eab0 | 40 | V4L2_PIX_FMT_Y10, 10, "Greyscale 10 bpp", }, |
3336f07a BB |
41 | { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10, |
42 | MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8, | |
a1d4eab0 | 43 | V4L2_PIX_FMT_Y12, 12, "Greyscale 12 bpp", }, |
3336f07a BB |
44 | { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, |
45 | MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, | |
a1d4eab0 | 46 | V4L2_PIX_FMT_SBGGR8, 8, "BGGR Bayer 8 bpp", }, |
3336f07a BB |
47 | { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, |
48 | MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, | |
a1d4eab0 | 49 | V4L2_PIX_FMT_SGBRG8, 8, "GBRG Bayer 8 bpp", }, |
3336f07a BB |
50 | { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, |
51 | MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, | |
a1d4eab0 | 52 | V4L2_PIX_FMT_SGRBG8, 8, "GRBG Bayer 8 bpp", }, |
3336f07a BB |
53 | { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, |
54 | MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, | |
a1d4eab0 | 55 | V4L2_PIX_FMT_SRGGB8, 8, "RGGB Bayer 8 bpp", }, |
3336f07a BB |
56 | { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, |
57 | MEDIA_BUS_FMT_SGRBG10_1X10, 0, | |
a1d4eab0 | 58 | V4L2_PIX_FMT_SGRBG10DPCM8, 8, "GRBG Bayer 10 bpp DPCM8", }, |
3336f07a BB |
59 | { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, |
60 | MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8, | |
a1d4eab0 | 61 | V4L2_PIX_FMT_SBGGR10, 10, "BGGR Bayer 10 bpp", }, |
3336f07a BB |
62 | { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, |
63 | MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8, | |
a1d4eab0 | 64 | V4L2_PIX_FMT_SGBRG10, 10, "GBRG Bayer 10 bpp", }, |
3336f07a BB |
65 | { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, |
66 | MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8, | |
a1d4eab0 | 67 | V4L2_PIX_FMT_SGRBG10, 10, "GRBG Bayer 10 bpp", }, |
3336f07a BB |
68 | { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, |
69 | MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8, | |
a1d4eab0 | 70 | V4L2_PIX_FMT_SRGGB10, 10, "RGGB Bayer 10 bpp", }, |
3336f07a BB |
71 | { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10, |
72 | MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8, | |
a1d4eab0 | 73 | V4L2_PIX_FMT_SBGGR12, 12, "BGGR Bayer 12 bpp", }, |
3336f07a BB |
74 | { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10, |
75 | MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8, | |
a1d4eab0 | 76 | V4L2_PIX_FMT_SGBRG12, 12, "GBRG Bayer 12 bpp", }, |
3336f07a BB |
77 | { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10, |
78 | MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8, | |
a1d4eab0 | 79 | V4L2_PIX_FMT_SGRBG12, 12, "GRBG Bayer 12 bpp", }, |
3336f07a BB |
80 | { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10, |
81 | MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8, | |
a1d4eab0 | 82 | V4L2_PIX_FMT_SRGGB12, 12, "RGGB Bayer 12 bpp", }, |
3336f07a BB |
83 | { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16, |
84 | MEDIA_BUS_FMT_UYVY8_1X16, 0, | |
a1d4eab0 | 85 | V4L2_PIX_FMT_UYVY, 16, "YUV 4:2:2 (UYVY)", }, |
3336f07a BB |
86 | { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16, |
87 | MEDIA_BUS_FMT_YUYV8_1X16, 0, | |
a1d4eab0 | 88 | V4L2_PIX_FMT_YUYV, 16, "YUV 4:2:2 (YUYV)", }, |
3336f07a BB |
89 | { MEDIA_BUS_FMT_YUYV8_1_5X8, MEDIA_BUS_FMT_YUYV8_1_5X8, |
90 | MEDIA_BUS_FMT_YUYV8_1_5X8, 0, | |
a1d4eab0 | 91 | V4L2_PIX_FMT_NV12, 8, "YUV 4:2:0 (NV12)", }, |
fc96d58c SA |
92 | }; |
93 | ||
94 | const struct iss_format_info * | |
3336f07a | 95 | omap4iss_video_format_info(u32 code) |
fc96d58c SA |
96 | { |
97 | unsigned int i; | |
98 | ||
99 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
100 | if (formats[i].code == code) | |
101 | return &formats[i]; | |
102 | } | |
103 | ||
104 | return NULL; | |
105 | } | |
106 | ||
107 | /* | |
108 | * iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format | |
109 | * @video: ISS video instance | |
110 | * @mbus: v4l2_mbus_framefmt format (input) | |
111 | * @pix: v4l2_pix_format format (output) | |
112 | * | |
113 | * Fill the output pix structure with information from the input mbus format. | |
114 | * The bytesperline and sizeimage fields are computed from the requested bytes | |
115 | * per line value in the pix format and information from the video instance. | |
116 | * | |
117 | * Return the number of padding bytes at end of line. | |
118 | */ | |
119 | static unsigned int iss_video_mbus_to_pix(const struct iss_video *video, | |
120 | const struct v4l2_mbus_framefmt *mbus, | |
121 | struct v4l2_pix_format *pix) | |
122 | { | |
123 | unsigned int bpl = pix->bytesperline; | |
124 | unsigned int min_bpl; | |
125 | unsigned int i; | |
126 | ||
127 | memset(pix, 0, sizeof(*pix)); | |
128 | pix->width = mbus->width; | |
129 | pix->height = mbus->height; | |
130 | ||
131 | /* Skip the last format in the loop so that it will be selected if no | |
132 | * match is found. | |
133 | */ | |
134 | for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { | |
135 | if (formats[i].code == mbus->code) | |
136 | break; | |
137 | } | |
138 | ||
139 | min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8; | |
140 | ||
141 | /* Clamp the requested bytes per line value. If the maximum bytes per | |
142 | * line value is zero, the module doesn't support user configurable line | |
143 | * sizes. Override the requested value with the minimum in that case. | |
144 | */ | |
145 | if (video->bpl_max) | |
146 | bpl = clamp(bpl, min_bpl, video->bpl_max); | |
147 | else | |
148 | bpl = min_bpl; | |
149 | ||
150 | if (!video->bpl_zero_padding || bpl != min_bpl) | |
151 | bpl = ALIGN(bpl, video->bpl_alignment); | |
152 | ||
153 | pix->pixelformat = formats[i].pixelformat; | |
154 | pix->bytesperline = bpl; | |
155 | pix->sizeimage = pix->bytesperline * pix->height; | |
156 | pix->colorspace = mbus->colorspace; | |
157 | pix->field = mbus->field; | |
158 | ||
159 | /* FIXME: Special case for NV12! We should make this nicer... */ | |
160 | if (pix->pixelformat == V4L2_PIX_FMT_NV12) | |
161 | pix->sizeimage += (pix->bytesperline * pix->height) / 2; | |
162 | ||
163 | return bpl - min_bpl; | |
164 | } | |
165 | ||
166 | static void iss_video_pix_to_mbus(const struct v4l2_pix_format *pix, | |
167 | struct v4l2_mbus_framefmt *mbus) | |
168 | { | |
169 | unsigned int i; | |
170 | ||
171 | memset(mbus, 0, sizeof(*mbus)); | |
172 | mbus->width = pix->width; | |
173 | mbus->height = pix->height; | |
174 | ||
ac0eb480 LP |
175 | /* Skip the last format in the loop so that it will be selected if no |
176 | * match is found. | |
177 | */ | |
178 | for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { | |
fc96d58c SA |
179 | if (formats[i].pixelformat == pix->pixelformat) |
180 | break; | |
181 | } | |
182 | ||
fc96d58c SA |
183 | mbus->code = formats[i].code; |
184 | mbus->colorspace = pix->colorspace; | |
185 | mbus->field = pix->field; | |
186 | } | |
187 | ||
188 | static struct v4l2_subdev * | |
189 | iss_video_remote_subdev(struct iss_video *video, u32 *pad) | |
190 | { | |
191 | struct media_pad *remote; | |
192 | ||
193 | remote = media_entity_remote_pad(&video->pad); | |
194 | ||
3efdf62c | 195 | if (!remote || !is_media_entity_v4l2_subdev(remote->entity)) |
fc96d58c SA |
196 | return NULL; |
197 | ||
198 | if (pad) | |
199 | *pad = remote->index; | |
200 | ||
201 | return media_entity_to_v4l2_subdev(remote->entity); | |
202 | } | |
203 | ||
204 | /* Return a pointer to the ISS video instance at the far end of the pipeline. */ | |
205 | static struct iss_video * | |
206 | iss_video_far_end(struct iss_video *video) | |
207 | { | |
208 | struct media_entity_graph graph; | |
209 | struct media_entity *entity = &video->video.entity; | |
d10c9894 | 210 | struct media_device *mdev = entity->graph_obj.mdev; |
fc96d58c SA |
211 | struct iss_video *far_end = NULL; |
212 | ||
213 | mutex_lock(&mdev->graph_mutex); | |
809fe79a SA |
214 | |
215 | if (media_entity_graph_walk_init(&graph, mdev)) { | |
216 | mutex_unlock(&mdev->graph_mutex); | |
217 | return NULL; | |
218 | } | |
219 | ||
fc96d58c SA |
220 | media_entity_graph_walk_start(&graph, entity); |
221 | ||
222 | while ((entity = media_entity_graph_walk_next(&graph))) { | |
223 | if (entity == &video->video.entity) | |
224 | continue; | |
225 | ||
45b46879 | 226 | if (!is_media_entity_v4l2_video_device(entity)) |
fc96d58c SA |
227 | continue; |
228 | ||
229 | far_end = to_iss_video(media_entity_to_video_device(entity)); | |
230 | if (far_end->type != video->type) | |
231 | break; | |
232 | ||
233 | far_end = NULL; | |
234 | } | |
235 | ||
236 | mutex_unlock(&mdev->graph_mutex); | |
809fe79a SA |
237 | |
238 | media_entity_graph_walk_cleanup(&graph); | |
239 | ||
fc96d58c SA |
240 | return far_end; |
241 | } | |
242 | ||
243 | static int | |
cc3c2ac2 LP |
244 | __iss_video_get_format(struct iss_video *video, |
245 | struct v4l2_mbus_framefmt *format) | |
fc96d58c SA |
246 | { |
247 | struct v4l2_subdev_format fmt; | |
248 | struct v4l2_subdev *subdev; | |
249 | u32 pad; | |
250 | int ret; | |
251 | ||
252 | subdev = iss_video_remote_subdev(video, &pad); | |
9058fc92 | 253 | if (!subdev) |
fc96d58c SA |
254 | return -EINVAL; |
255 | ||
cc3c2ac2 | 256 | memset(&fmt, 0, sizeof(fmt)); |
fc96d58c SA |
257 | fmt.pad = pad; |
258 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
fc96d58c | 259 | |
c3dbc70d LP |
260 | mutex_lock(&video->mutex); |
261 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
fc96d58c SA |
262 | mutex_unlock(&video->mutex); |
263 | ||
264 | if (ret) | |
265 | return ret; | |
266 | ||
cc3c2ac2 LP |
267 | *format = fmt.format; |
268 | return 0; | |
fc96d58c SA |
269 | } |
270 | ||
271 | static int | |
272 | iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh) | |
273 | { | |
cc3c2ac2 LP |
274 | struct v4l2_mbus_framefmt format; |
275 | struct v4l2_pix_format pixfmt; | |
fc96d58c SA |
276 | int ret; |
277 | ||
fc96d58c SA |
278 | ret = __iss_video_get_format(video, &format); |
279 | if (ret < 0) | |
280 | return ret; | |
281 | ||
cc3c2ac2 LP |
282 | pixfmt.bytesperline = 0; |
283 | ret = iss_video_mbus_to_pix(video, &format, &pixfmt); | |
284 | ||
285 | if (vfh->format.fmt.pix.pixelformat != pixfmt.pixelformat || | |
286 | vfh->format.fmt.pix.height != pixfmt.height || | |
287 | vfh->format.fmt.pix.width != pixfmt.width || | |
288 | vfh->format.fmt.pix.bytesperline != pixfmt.bytesperline || | |
289 | vfh->format.fmt.pix.sizeimage != pixfmt.sizeimage) | |
fc96d58c SA |
290 | return -EINVAL; |
291 | ||
292 | return ret; | |
293 | } | |
294 | ||
295 | /* ----------------------------------------------------------------------------- | |
296 | * Video queue operations | |
297 | */ | |
298 | ||
a0fe029c | 299 | static int iss_video_queue_setup(struct vb2_queue *vq, |
fc96d58c SA |
300 | unsigned int *count, unsigned int *num_planes, |
301 | unsigned int sizes[], void *alloc_ctxs[]) | |
302 | { | |
303 | struct iss_video_fh *vfh = vb2_get_drv_priv(vq); | |
304 | struct iss_video *video = vfh->video; | |
305 | ||
306 | /* Revisit multi-planar support for NV12 */ | |
307 | *num_planes = 1; | |
308 | ||
309 | sizes[0] = vfh->format.fmt.pix.sizeimage; | |
310 | if (sizes[0] == 0) | |
311 | return -EINVAL; | |
312 | ||
a0fe029c | 313 | *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0])); |
fc96d58c SA |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static void iss_video_buf_cleanup(struct vb2_buffer *vb) | |
319 | { | |
2d700715 JS |
320 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
321 | struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); | |
fc96d58c SA |
322 | |
323 | if (buffer->iss_addr) | |
324 | buffer->iss_addr = 0; | |
325 | } | |
326 | ||
327 | static int iss_video_buf_prepare(struct vb2_buffer *vb) | |
328 | { | |
2d700715 | 329 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
fc96d58c | 330 | struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); |
2d700715 | 331 | struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
fc96d58c SA |
332 | struct iss_video *video = vfh->video; |
333 | unsigned long size = vfh->format.fmt.pix.sizeimage; | |
334 | dma_addr_t addr; | |
335 | ||
336 | if (vb2_plane_size(vb, 0) < size) | |
337 | return -ENOBUFS; | |
338 | ||
339 | addr = vb2_dma_contig_plane_dma_addr(vb, 0); | |
340 | if (!IS_ALIGNED(addr, 32)) { | |
499226fb LP |
341 | dev_dbg(video->iss->dev, |
342 | "Buffer address must be aligned to 32 bytes boundary.\n"); | |
fc96d58c SA |
343 | return -EINVAL; |
344 | } | |
345 | ||
346 | vb2_set_plane_payload(vb, 0, size); | |
347 | buffer->iss_addr = addr; | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static void iss_video_buf_queue(struct vb2_buffer *vb) | |
352 | { | |
2d700715 | 353 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
fc96d58c SA |
354 | struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); |
355 | struct iss_video *video = vfh->video; | |
2d700715 | 356 | struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
fc96d58c | 357 | struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); |
fc96d58c | 358 | unsigned long flags; |
112da085 | 359 | bool empty; |
fc96d58c SA |
360 | |
361 | spin_lock_irqsave(&video->qlock, flags); | |
112da085 | 362 | |
cb766937 LP |
363 | /* Mark the buffer is faulty and give it back to the queue immediately |
364 | * if the video node has registered an error. vb2 will perform the same | |
365 | * check when preparing the buffer, but that is inherently racy, so we | |
366 | * need to handle the race condition with an authoritative check here. | |
367 | */ | |
112da085 LP |
368 | if (unlikely(video->error)) { |
369 | vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); | |
370 | spin_unlock_irqrestore(&video->qlock, flags); | |
371 | return; | |
372 | } | |
373 | ||
fc96d58c SA |
374 | empty = list_empty(&video->dmaqueue); |
375 | list_add_tail(&buffer->list, &video->dmaqueue); | |
112da085 | 376 | |
fc96d58c SA |
377 | spin_unlock_irqrestore(&video->qlock, flags); |
378 | ||
379 | if (empty) { | |
380 | enum iss_pipeline_state state; | |
381 | unsigned int start; | |
382 | ||
383 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
384 | state = ISS_PIPELINE_QUEUE_OUTPUT; | |
385 | else | |
386 | state = ISS_PIPELINE_QUEUE_INPUT; | |
387 | ||
388 | spin_lock_irqsave(&pipe->lock, flags); | |
389 | pipe->state |= state; | |
390 | video->ops->queue(video, buffer); | |
391 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED; | |
392 | ||
393 | start = iss_pipeline_ready(pipe); | |
394 | if (start) | |
395 | pipe->state |= ISS_PIPELINE_STREAM; | |
396 | spin_unlock_irqrestore(&pipe->lock, flags); | |
397 | ||
398 | if (start) | |
399 | omap4iss_pipeline_set_stream(pipe, | |
400 | ISS_PIPELINE_STREAM_SINGLESHOT); | |
401 | } | |
402 | } | |
403 | ||
fbac1400 | 404 | static const struct vb2_ops iss_video_vb2ops = { |
fc96d58c SA |
405 | .queue_setup = iss_video_queue_setup, |
406 | .buf_prepare = iss_video_buf_prepare, | |
407 | .buf_queue = iss_video_buf_queue, | |
408 | .buf_cleanup = iss_video_buf_cleanup, | |
409 | }; | |
410 | ||
411 | /* | |
412 | * omap4iss_video_buffer_next - Complete the current buffer and return the next | |
413 | * @video: ISS video object | |
414 | * | |
415 | * Remove the current video buffer from the DMA queue and fill its timestamp, | |
416 | * field count and state fields before waking up its completion handler. | |
417 | * | |
418 | * For capture video nodes, the buffer state is set to VB2_BUF_STATE_DONE if no | |
419 | * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise. | |
420 | * | |
421 | * The DMA queue is expected to contain at least one buffer. | |
422 | * | |
423 | * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is | |
424 | * empty. | |
425 | */ | |
426 | struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video) | |
427 | { | |
428 | struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); | |
429 | enum iss_pipeline_state state; | |
430 | struct iss_buffer *buf; | |
431 | unsigned long flags; | |
fc96d58c SA |
432 | |
433 | spin_lock_irqsave(&video->qlock, flags); | |
434 | if (WARN_ON(list_empty(&video->dmaqueue))) { | |
435 | spin_unlock_irqrestore(&video->qlock, flags); | |
436 | return NULL; | |
437 | } | |
438 | ||
439 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, | |
440 | list); | |
441 | list_del(&buf->list); | |
442 | spin_unlock_irqrestore(&video->qlock, flags); | |
443 | ||
d6dd645e | 444 | buf->vb.vb2_buf.timestamp = ktime_get_ns(); |
fc96d58c SA |
445 | |
446 | /* Do frame number propagation only if this is the output video node. | |
447 | * Frame number either comes from the CSI receivers or it gets | |
448 | * incremented here if H3A is not active. | |
449 | * Note: There is no guarantee that the output buffer will finish | |
450 | * first, so the input number might lag behind by 1 in some cases. | |
451 | */ | |
452 | if (video == pipe->output && !pipe->do_propagation) | |
2d700715 | 453 | buf->vb.sequence = |
a0fe029c | 454 | atomic_inc_return(&pipe->frame_number); |
fc96d58c | 455 | else |
2d700715 | 456 | buf->vb.sequence = atomic_read(&pipe->frame_number); |
fc96d58c | 457 | |
2d700715 | 458 | vb2_buffer_done(&buf->vb.vb2_buf, pipe->error ? |
a0fe029c | 459 | VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); |
fc96d58c SA |
460 | pipe->error = false; |
461 | ||
462 | spin_lock_irqsave(&video->qlock, flags); | |
463 | if (list_empty(&video->dmaqueue)) { | |
464 | spin_unlock_irqrestore(&video->qlock, flags); | |
465 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
466 | state = ISS_PIPELINE_QUEUE_OUTPUT | |
467 | | ISS_PIPELINE_STREAM; | |
468 | else | |
469 | state = ISS_PIPELINE_QUEUE_INPUT | |
470 | | ISS_PIPELINE_STREAM; | |
471 | ||
472 | spin_lock_irqsave(&pipe->lock, flags); | |
473 | pipe->state &= ~state; | |
474 | if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS) | |
475 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; | |
476 | spin_unlock_irqrestore(&pipe->lock, flags); | |
477 | return NULL; | |
478 | } | |
479 | ||
9058fc92 | 480 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input) { |
f7d40eea | 481 | spin_lock(&pipe->lock); |
fc96d58c | 482 | pipe->state &= ~ISS_PIPELINE_STREAM; |
f7d40eea | 483 | spin_unlock(&pipe->lock); |
fc96d58c SA |
484 | } |
485 | ||
486 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, | |
487 | list); | |
488 | spin_unlock_irqrestore(&video->qlock, flags); | |
2d700715 | 489 | buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE; |
fc96d58c SA |
490 | return buf; |
491 | } | |
492 | ||
112da085 LP |
493 | /* |
494 | * omap4iss_video_cancel_stream - Cancel stream on a video node | |
495 | * @video: ISS video object | |
496 | * | |
497 | * Cancelling a stream mark all buffers on the video node as erroneous and makes | |
498 | * sure no new buffer can be queued. | |
499 | */ | |
500 | void omap4iss_video_cancel_stream(struct iss_video *video) | |
501 | { | |
502 | unsigned long flags; | |
503 | ||
504 | spin_lock_irqsave(&video->qlock, flags); | |
505 | ||
506 | while (!list_empty(&video->dmaqueue)) { | |
507 | struct iss_buffer *buf; | |
508 | ||
509 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, | |
510 | list); | |
511 | list_del(&buf->list); | |
2d700715 | 512 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
112da085 LP |
513 | } |
514 | ||
cb766937 | 515 | vb2_queue_error(video->queue); |
112da085 LP |
516 | video->error = true; |
517 | ||
518 | spin_unlock_irqrestore(&video->qlock, flags); | |
519 | } | |
520 | ||
fc96d58c SA |
521 | /* ----------------------------------------------------------------------------- |
522 | * V4L2 ioctls | |
523 | */ | |
524 | ||
525 | static int | |
526 | iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) | |
527 | { | |
528 | struct iss_video *video = video_drvdata(file); | |
529 | ||
530 | strlcpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver)); | |
531 | strlcpy(cap->card, video->video.name, sizeof(cap->card)); | |
532 | strlcpy(cap->bus_info, "media", sizeof(cap->bus_info)); | |
533 | ||
534 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
35c71be8 | 535 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
fc96d58c | 536 | else |
35c71be8 LP |
537 | cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; |
538 | ||
539 | cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING | |
540 | | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT; | |
fc96d58c SA |
541 | |
542 | return 0; | |
543 | } | |
544 | ||
0b1d4249 LP |
545 | static int |
546 | iss_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f) | |
547 | { | |
548 | struct iss_video *video = video_drvdata(file); | |
549 | struct v4l2_mbus_framefmt format; | |
550 | unsigned int index = f->index; | |
551 | unsigned int i; | |
552 | int ret; | |
553 | ||
554 | if (f->type != video->type) | |
555 | return -EINVAL; | |
556 | ||
557 | ret = __iss_video_get_format(video, &format); | |
558 | if (ret < 0) | |
559 | return ret; | |
560 | ||
561 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { | |
562 | const struct iss_format_info *info = &formats[i]; | |
563 | ||
564 | if (format.code != info->code) | |
565 | continue; | |
566 | ||
567 | if (index == 0) { | |
568 | f->pixelformat = info->pixelformat; | |
569 | strlcpy(f->description, info->description, | |
570 | sizeof(f->description)); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | index--; | |
575 | } | |
576 | ||
577 | return -EINVAL; | |
578 | } | |
579 | ||
fc96d58c SA |
580 | static int |
581 | iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format) | |
582 | { | |
583 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
584 | struct iss_video *video = video_drvdata(file); | |
585 | ||
586 | if (format->type != video->type) | |
587 | return -EINVAL; | |
588 | ||
589 | mutex_lock(&video->mutex); | |
590 | *format = vfh->format; | |
591 | mutex_unlock(&video->mutex); | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
596 | static int | |
597 | iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format) | |
598 | { | |
599 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
600 | struct iss_video *video = video_drvdata(file); | |
601 | struct v4l2_mbus_framefmt fmt; | |
602 | ||
603 | if (format->type != video->type) | |
604 | return -EINVAL; | |
605 | ||
606 | mutex_lock(&video->mutex); | |
607 | ||
608 | /* Fill the bytesperline and sizeimage fields by converting to media bus | |
609 | * format and back to pixel format. | |
610 | */ | |
611 | iss_video_pix_to_mbus(&format->fmt.pix, &fmt); | |
612 | iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix); | |
613 | ||
614 | vfh->format = *format; | |
615 | ||
616 | mutex_unlock(&video->mutex); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | static int | |
621 | iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format) | |
622 | { | |
623 | struct iss_video *video = video_drvdata(file); | |
624 | struct v4l2_subdev_format fmt; | |
625 | struct v4l2_subdev *subdev; | |
626 | u32 pad; | |
627 | int ret; | |
628 | ||
629 | if (format->type != video->type) | |
630 | return -EINVAL; | |
631 | ||
632 | subdev = iss_video_remote_subdev(video, &pad); | |
9058fc92 | 633 | if (!subdev) |
fc96d58c SA |
634 | return -EINVAL; |
635 | ||
636 | iss_video_pix_to_mbus(&format->fmt.pix, &fmt.format); | |
637 | ||
638 | fmt.pad = pad; | |
639 | fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; | |
640 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); | |
641 | if (ret) | |
e43484e4 | 642 | return ret; |
fc96d58c SA |
643 | |
644 | iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); | |
645 | return 0; | |
646 | } | |
647 | ||
fc96d58c SA |
648 | static int |
649 | iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
650 | { | |
651 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
652 | struct iss_video *video = video_drvdata(file); | |
653 | ||
654 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
655 | video->type != a->type) | |
656 | return -EINVAL; | |
657 | ||
658 | memset(a, 0, sizeof(*a)); | |
659 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
660 | a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; | |
661 | a->parm.output.timeperframe = vfh->timeperframe; | |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | static int | |
667 | iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) | |
668 | { | |
669 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
670 | struct iss_video *video = video_drvdata(file); | |
671 | ||
672 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || | |
673 | video->type != a->type) | |
674 | return -EINVAL; | |
675 | ||
676 | if (a->parm.output.timeperframe.denominator == 0) | |
677 | a->parm.output.timeperframe.denominator = 1; | |
678 | ||
679 | vfh->timeperframe = a->parm.output.timeperframe; | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
684 | static int | |
685 | iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) | |
686 | { | |
687 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
688 | ||
689 | return vb2_reqbufs(&vfh->queue, rb); | |
690 | } | |
691 | ||
692 | static int | |
693 | iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
694 | { | |
695 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
696 | ||
697 | return vb2_querybuf(&vfh->queue, b); | |
698 | } | |
699 | ||
700 | static int | |
701 | iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
702 | { | |
703 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
704 | ||
705 | return vb2_qbuf(&vfh->queue, b); | |
706 | } | |
707 | ||
3e90f789 LP |
708 | static int |
709 | iss_video_expbuf(struct file *file, void *fh, struct v4l2_exportbuffer *e) | |
710 | { | |
711 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
712 | ||
713 | return vb2_expbuf(&vfh->queue, e); | |
714 | } | |
715 | ||
fc96d58c SA |
716 | static int |
717 | iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
718 | { | |
719 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
720 | ||
721 | return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK); | |
722 | } | |
723 | ||
724 | /* | |
725 | * Stream management | |
726 | * | |
727 | * Every ISS pipeline has a single input and a single output. The input can be | |
728 | * either a sensor or a video node. The output is always a video node. | |
729 | * | |
730 | * As every pipeline has an output video node, the ISS video objects at the | |
731 | * pipeline output stores the pipeline state. It tracks the streaming state of | |
732 | * both the input and output, as well as the availability of buffers. | |
733 | * | |
734 | * In sensor-to-memory mode, frames are always available at the pipeline input. | |
735 | * Starting the sensor usually requires I2C transfers and must be done in | |
736 | * interruptible context. The pipeline is started and stopped synchronously | |
737 | * to the stream on/off commands. All modules in the pipeline will get their | |
738 | * subdev set stream handler called. The module at the end of the pipeline must | |
739 | * delay starting the hardware until buffers are available at its output. | |
740 | * | |
741 | * In memory-to-memory mode, starting/stopping the stream requires | |
742 | * synchronization between the input and output. ISS modules can't be stopped | |
743 | * in the middle of a frame, and at least some of the modules seem to become | |
744 | * busy as soon as they're started, even if they don't receive a frame start | |
745 | * event. For that reason frames need to be processed in single-shot mode. The | |
746 | * driver needs to wait until a frame is completely processed and written to | |
747 | * memory before restarting the pipeline for the next frame. Pipelined | |
748 | * processing might be possible but requires more testing. | |
749 | * | |
750 | * Stream start must be delayed until buffers are available at both the input | |
751 | * and output. The pipeline must be started in the videobuf queue callback with | |
752 | * the buffers queue spinlock held. The modules subdev set stream operation must | |
753 | * not sleep. | |
754 | */ | |
755 | static int | |
756 | iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) | |
757 | { | |
758 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
759 | struct iss_video *video = video_drvdata(file); | |
f3632ba8 | 760 | struct media_entity_graph graph; |
6246b2a7 | 761 | struct media_entity *entity = &video->video.entity; |
fc96d58c SA |
762 | enum iss_pipeline_state state; |
763 | struct iss_pipeline *pipe; | |
764 | struct iss_video *far_end; | |
765 | unsigned long flags; | |
766 | int ret; | |
767 | ||
768 | if (type != video->type) | |
769 | return -EINVAL; | |
770 | ||
771 | mutex_lock(&video->stream_lock); | |
772 | ||
fc96d58c SA |
773 | /* Start streaming on the pipeline. No link touching an entity in the |
774 | * pipeline can be activated or deactivated once streaming is started. | |
775 | */ | |
6246b2a7 SA |
776 | pipe = entity->pipe |
777 | ? to_iss_pipeline(entity) : &video->pipe; | |
fc96d58c SA |
778 | pipe->external = NULL; |
779 | pipe->external_rate = 0; | |
780 | pipe->external_bpp = 0; | |
6246b2a7 SA |
781 | |
782 | ret = media_entity_enum_init(&pipe->ent_enum, entity->graph_obj.mdev); | |
783 | if (ret) | |
809fe79a SA |
784 | goto err_graph_walk_init; |
785 | ||
786 | ret = media_entity_graph_walk_init(&graph, entity->graph_obj.mdev); | |
787 | if (ret) | |
788 | goto err_graph_walk_init; | |
fc96d58c SA |
789 | |
790 | if (video->iss->pdata->set_constraints) | |
791 | video->iss->pdata->set_constraints(video->iss, true); | |
792 | ||
6246b2a7 | 793 | ret = media_entity_pipeline_start(entity, &pipe->pipe); |
fc96d58c SA |
794 | if (ret < 0) |
795 | goto err_media_entity_pipeline_start; | |
796 | ||
f3632ba8 LP |
797 | media_entity_graph_walk_start(&graph, entity); |
798 | while ((entity = media_entity_graph_walk_next(&graph))) | |
6246b2a7 | 799 | media_entity_enum_set(&pipe->ent_enum, entity); |
f3632ba8 | 800 | |
fc96d58c SA |
801 | /* Verify that the currently configured format matches the output of |
802 | * the connected subdev. | |
803 | */ | |
804 | ret = iss_video_check_format(video, vfh); | |
805 | if (ret < 0) | |
806 | goto err_iss_video_check_format; | |
807 | ||
808 | video->bpl_padding = ret; | |
809 | video->bpl_value = vfh->format.fmt.pix.bytesperline; | |
810 | ||
811 | /* Find the ISS video node connected at the far end of the pipeline and | |
812 | * update the pipeline. | |
813 | */ | |
814 | far_end = iss_video_far_end(video); | |
815 | ||
816 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
817 | state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT; | |
818 | pipe->input = far_end; | |
819 | pipe->output = video; | |
820 | } else { | |
9058fc92 | 821 | if (!far_end) { |
fc96d58c SA |
822 | ret = -EPIPE; |
823 | goto err_iss_video_check_format; | |
824 | } | |
825 | ||
826 | state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT; | |
827 | pipe->input = video; | |
828 | pipe->output = far_end; | |
829 | } | |
830 | ||
831 | spin_lock_irqsave(&pipe->lock, flags); | |
832 | pipe->state &= ~ISS_PIPELINE_STREAM; | |
833 | pipe->state |= state; | |
834 | spin_unlock_irqrestore(&pipe->lock, flags); | |
835 | ||
836 | /* Set the maximum time per frame as the value requested by userspace. | |
837 | * This is a soft limit that can be overridden if the hardware doesn't | |
838 | * support the request limit. | |
839 | */ | |
840 | if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) | |
841 | pipe->max_timeperframe = vfh->timeperframe; | |
842 | ||
843 | video->queue = &vfh->queue; | |
844 | INIT_LIST_HEAD(&video->dmaqueue); | |
112da085 | 845 | video->error = false; |
fc96d58c SA |
846 | atomic_set(&pipe->frame_number, -1); |
847 | ||
848 | ret = vb2_streamon(&vfh->queue, type); | |
849 | if (ret < 0) | |
850 | goto err_iss_video_check_format; | |
851 | ||
852 | /* In sensor-to-memory mode, the stream can be started synchronously | |
853 | * to the stream on command. In memory-to-memory mode, it will be | |
854 | * started when buffers are queued on both the input and output. | |
855 | */ | |
9058fc92 | 856 | if (!pipe->input) { |
fc96d58c | 857 | unsigned long flags; |
00ef07e3 | 858 | |
fc96d58c SA |
859 | ret = omap4iss_pipeline_set_stream(pipe, |
860 | ISS_PIPELINE_STREAM_CONTINUOUS); | |
861 | if (ret < 0) | |
862 | goto err_omap4iss_set_stream; | |
863 | spin_lock_irqsave(&video->qlock, flags); | |
864 | if (list_empty(&video->dmaqueue)) | |
865 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; | |
866 | spin_unlock_irqrestore(&video->qlock, flags); | |
867 | } | |
868 | ||
809fe79a SA |
869 | media_entity_graph_walk_cleanup(&graph); |
870 | ||
2b16b44a | 871 | mutex_unlock(&video->stream_lock); |
6246b2a7 | 872 | |
2b16b44a LP |
873 | return 0; |
874 | ||
fc96d58c | 875 | err_omap4iss_set_stream: |
2b16b44a | 876 | vb2_streamoff(&vfh->queue, type); |
fc96d58c | 877 | err_iss_video_check_format: |
2b16b44a | 878 | media_entity_pipeline_stop(&video->video.entity); |
fc96d58c | 879 | err_media_entity_pipeline_start: |
2b16b44a LP |
880 | if (video->iss->pdata->set_constraints) |
881 | video->iss->pdata->set_constraints(video->iss, false); | |
882 | video->queue = NULL; | |
fc96d58c | 883 | |
809fe79a SA |
884 | media_entity_graph_walk_cleanup(&graph); |
885 | ||
886 | err_graph_walk_init: | |
6246b2a7 SA |
887 | media_entity_enum_cleanup(&pipe->ent_enum); |
888 | ||
fc96d58c | 889 | mutex_unlock(&video->stream_lock); |
6246b2a7 | 890 | |
fc96d58c SA |
891 | return ret; |
892 | } | |
893 | ||
894 | static int | |
895 | iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) | |
896 | { | |
897 | struct iss_video_fh *vfh = to_iss_video_fh(fh); | |
898 | struct iss_video *video = video_drvdata(file); | |
899 | struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); | |
900 | enum iss_pipeline_state state; | |
901 | unsigned long flags; | |
902 | ||
903 | if (type != video->type) | |
904 | return -EINVAL; | |
905 | ||
906 | mutex_lock(&video->stream_lock); | |
907 | ||
908 | if (!vb2_is_streaming(&vfh->queue)) | |
909 | goto done; | |
910 | ||
911 | /* Update the pipeline state. */ | |
912 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
913 | state = ISS_PIPELINE_STREAM_OUTPUT | |
914 | | ISS_PIPELINE_QUEUE_OUTPUT; | |
915 | else | |
916 | state = ISS_PIPELINE_STREAM_INPUT | |
917 | | ISS_PIPELINE_QUEUE_INPUT; | |
918 | ||
919 | spin_lock_irqsave(&pipe->lock, flags); | |
920 | pipe->state &= ~state; | |
921 | spin_unlock_irqrestore(&pipe->lock, flags); | |
922 | ||
923 | /* Stop the stream. */ | |
924 | omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED); | |
925 | vb2_streamoff(&vfh->queue, type); | |
926 | video->queue = NULL; | |
fc96d58c | 927 | |
6246b2a7 SA |
928 | media_entity_enum_cleanup(&pipe->ent_enum); |
929 | ||
fc96d58c SA |
930 | if (video->iss->pdata->set_constraints) |
931 | video->iss->pdata->set_constraints(video->iss, false); | |
932 | media_entity_pipeline_stop(&video->video.entity); | |
933 | ||
934 | done: | |
935 | mutex_unlock(&video->stream_lock); | |
936 | return 0; | |
937 | } | |
938 | ||
939 | static int | |
940 | iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) | |
941 | { | |
942 | if (input->index > 0) | |
943 | return -EINVAL; | |
944 | ||
945 | strlcpy(input->name, "camera", sizeof(input->name)); | |
946 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
947 | ||
948 | return 0; | |
949 | } | |
950 | ||
951 | static int | |
952 | iss_video_g_input(struct file *file, void *fh, unsigned int *input) | |
953 | { | |
954 | *input = 0; | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
16422f55 LP |
959 | static int |
960 | iss_video_s_input(struct file *file, void *fh, unsigned int input) | |
961 | { | |
962 | return input == 0 ? 0 : -EINVAL; | |
963 | } | |
964 | ||
fc96d58c SA |
965 | static const struct v4l2_ioctl_ops iss_video_ioctl_ops = { |
966 | .vidioc_querycap = iss_video_querycap, | |
0b1d4249 | 967 | .vidioc_enum_fmt_vid_cap = iss_video_enum_format, |
fc96d58c SA |
968 | .vidioc_g_fmt_vid_cap = iss_video_get_format, |
969 | .vidioc_s_fmt_vid_cap = iss_video_set_format, | |
970 | .vidioc_try_fmt_vid_cap = iss_video_try_format, | |
971 | .vidioc_g_fmt_vid_out = iss_video_get_format, | |
972 | .vidioc_s_fmt_vid_out = iss_video_set_format, | |
973 | .vidioc_try_fmt_vid_out = iss_video_try_format, | |
fc96d58c SA |
974 | .vidioc_g_parm = iss_video_get_param, |
975 | .vidioc_s_parm = iss_video_set_param, | |
976 | .vidioc_reqbufs = iss_video_reqbufs, | |
977 | .vidioc_querybuf = iss_video_querybuf, | |
978 | .vidioc_qbuf = iss_video_qbuf, | |
3e90f789 | 979 | .vidioc_expbuf = iss_video_expbuf, |
fc96d58c SA |
980 | .vidioc_dqbuf = iss_video_dqbuf, |
981 | .vidioc_streamon = iss_video_streamon, | |
982 | .vidioc_streamoff = iss_video_streamoff, | |
983 | .vidioc_enum_input = iss_video_enum_input, | |
984 | .vidioc_g_input = iss_video_g_input, | |
16422f55 | 985 | .vidioc_s_input = iss_video_s_input, |
fc96d58c SA |
986 | }; |
987 | ||
988 | /* ----------------------------------------------------------------------------- | |
989 | * V4L2 file operations | |
990 | */ | |
991 | ||
992 | static int iss_video_open(struct file *file) | |
993 | { | |
994 | struct iss_video *video = video_drvdata(file); | |
995 | struct iss_video_fh *handle; | |
996 | struct vb2_queue *q; | |
997 | int ret = 0; | |
998 | ||
999 | handle = kzalloc(sizeof(*handle), GFP_KERNEL); | |
9058fc92 | 1000 | if (!handle) |
fc96d58c SA |
1001 | return -ENOMEM; |
1002 | ||
1003 | v4l2_fh_init(&handle->vfh, &video->video); | |
1004 | v4l2_fh_add(&handle->vfh); | |
1005 | ||
1006 | /* If this is the first user, initialise the pipeline. */ | |
9058fc92 | 1007 | if (!omap4iss_get(video->iss)) { |
fc96d58c SA |
1008 | ret = -EBUSY; |
1009 | goto done; | |
1010 | } | |
1011 | ||
a288b78b | 1012 | ret = v4l2_pipeline_pm_use(&video->video.entity, 1); |
fc96d58c SA |
1013 | if (ret < 0) { |
1014 | omap4iss_put(video->iss); | |
1015 | goto done; | |
1016 | } | |
1017 | ||
fc96d58c SA |
1018 | q = &handle->queue; |
1019 | ||
1020 | q->type = video->type; | |
3e90f789 | 1021 | q->io_modes = VB2_MMAP | VB2_DMABUF; |
fc96d58c SA |
1022 | q->drv_priv = handle; |
1023 | q->ops = &iss_video_vb2ops; | |
1024 | q->mem_ops = &vb2_dma_contig_memops; | |
1025 | q->buf_struct_size = sizeof(struct iss_buffer); | |
ade48681 | 1026 | q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
57813da4 | 1027 | q->dev = video->iss->dev; |
fc96d58c SA |
1028 | |
1029 | ret = vb2_queue_init(q); | |
1030 | if (ret) { | |
1031 | omap4iss_put(video->iss); | |
1032 | goto done; | |
1033 | } | |
1034 | ||
1035 | memset(&handle->format, 0, sizeof(handle->format)); | |
1036 | handle->format.type = video->type; | |
1037 | handle->timeperframe.denominator = 1; | |
1038 | ||
1039 | handle->video = video; | |
1040 | file->private_data = &handle->vfh; | |
1041 | ||
1042 | done: | |
1043 | if (ret < 0) { | |
1044 | v4l2_fh_del(&handle->vfh); | |
1045 | kfree(handle); | |
1046 | } | |
1047 | ||
1048 | return ret; | |
1049 | } | |
1050 | ||
1051 | static int iss_video_release(struct file *file) | |
1052 | { | |
1053 | struct iss_video *video = video_drvdata(file); | |
1054 | struct v4l2_fh *vfh = file->private_data; | |
1055 | struct iss_video_fh *handle = to_iss_video_fh(vfh); | |
1056 | ||
1057 | /* Disable streaming and free the buffers queue resources. */ | |
1058 | iss_video_streamoff(file, vfh, video->type); | |
1059 | ||
a288b78b | 1060 | v4l2_pipeline_pm_use(&video->video.entity, 0); |
fc96d58c SA |
1061 | |
1062 | /* Release the videobuf2 queue */ | |
1063 | vb2_queue_release(&handle->queue); | |
1064 | ||
fc96d58c SA |
1065 | v4l2_fh_del(vfh); |
1066 | kfree(handle); | |
1067 | file->private_data = NULL; | |
1068 | ||
1069 | omap4iss_put(video->iss); | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static unsigned int iss_video_poll(struct file *file, poll_table *wait) | |
1075 | { | |
1076 | struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); | |
1077 | ||
1078 | return vb2_poll(&vfh->queue, file, wait); | |
1079 | } | |
1080 | ||
1081 | static int iss_video_mmap(struct file *file, struct vm_area_struct *vma) | |
1082 | { | |
1083 | struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); | |
1084 | ||
29ee6261 | 1085 | return vb2_mmap(&vfh->queue, vma); |
fc96d58c SA |
1086 | } |
1087 | ||
1088 | static struct v4l2_file_operations iss_video_fops = { | |
1089 | .owner = THIS_MODULE, | |
1090 | .unlocked_ioctl = video_ioctl2, | |
1091 | .open = iss_video_open, | |
1092 | .release = iss_video_release, | |
1093 | .poll = iss_video_poll, | |
1094 | .mmap = iss_video_mmap, | |
1095 | }; | |
1096 | ||
1097 | /* ----------------------------------------------------------------------------- | |
1098 | * ISS video core | |
1099 | */ | |
1100 | ||
1101 | static const struct iss_video_operations iss_video_dummy_ops = { | |
1102 | }; | |
1103 | ||
1104 | int omap4iss_video_init(struct iss_video *video, const char *name) | |
1105 | { | |
1106 | const char *direction; | |
1107 | int ret; | |
1108 | ||
1109 | switch (video->type) { | |
1110 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
1111 | direction = "output"; | |
1112 | video->pad.flags = MEDIA_PAD_FL_SINK; | |
1113 | break; | |
1114 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: | |
1115 | direction = "input"; | |
1116 | video->pad.flags = MEDIA_PAD_FL_SOURCE; | |
1117 | break; | |
1118 | ||
1119 | default: | |
1120 | return -EINVAL; | |
1121 | } | |
1122 | ||
ab22e77c | 1123 | ret = media_entity_pads_init(&video->video.entity, 1, &video->pad); |
fc96d58c SA |
1124 | if (ret < 0) |
1125 | return ret; | |
1126 | ||
2b44ac9e | 1127 | spin_lock_init(&video->qlock); |
fc96d58c SA |
1128 | mutex_init(&video->mutex); |
1129 | atomic_set(&video->active, 0); | |
1130 | ||
1131 | spin_lock_init(&video->pipe.lock); | |
1132 | mutex_init(&video->stream_lock); | |
1133 | ||
1134 | /* Initialize the video device. */ | |
9058fc92 | 1135 | if (!video->ops) |
fc96d58c SA |
1136 | video->ops = &iss_video_dummy_ops; |
1137 | ||
1138 | video->video.fops = &iss_video_fops; | |
1139 | snprintf(video->video.name, sizeof(video->video.name), | |
1140 | "OMAP4 ISS %s %s", name, direction); | |
1141 | video->video.vfl_type = VFL_TYPE_GRABBER; | |
1142 | video->video.release = video_device_release_empty; | |
1143 | video->video.ioctl_ops = &iss_video_ioctl_ops; | |
1144 | video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED; | |
1145 | ||
1146 | video_set_drvdata(&video->video, video); | |
1147 | ||
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | void omap4iss_video_cleanup(struct iss_video *video) | |
1152 | { | |
1153 | media_entity_cleanup(&video->video.entity); | |
1154 | mutex_destroy(&video->stream_lock); | |
1155 | mutex_destroy(&video->mutex); | |
1156 | } | |
1157 | ||
1158 | int omap4iss_video_register(struct iss_video *video, struct v4l2_device *vdev) | |
1159 | { | |
1160 | int ret; | |
1161 | ||
1162 | video->video.v4l2_dev = vdev; | |
1163 | ||
1164 | ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); | |
1165 | if (ret < 0) | |
4cd89e91 | 1166 | dev_err(video->iss->dev, |
8c6ccbeb | 1167 | "could not register video device (%d)\n", ret); |
fc96d58c SA |
1168 | |
1169 | return ret; | |
1170 | } | |
1171 | ||
1172 | void omap4iss_video_unregister(struct iss_video *video) | |
1173 | { | |
2b7f0b64 | 1174 | video_unregister_device(&video->video); |
fc96d58c | 1175 | } |