1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ispvideo.c
4 *
5 * TI OMAP3 ISP - Generic video node
6 *
7 * Copyright (C) 2009-2010 Nokia Corporation
8 *
9 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 * Sakari Ailus <sakari.ailus@iki.fi>
11 */
12
13 #include <linux/clk.h>
14 #include <linux/mm.h>
15 #include <linux/module.h>
16 #include <linux/pagemap.h>
17 #include <linux/scatterlist.h>
18 #include <linux/sched.h>
19 #include <linux/slab.h>
20 #include <linux/vmalloc.h>
21
22 #include <media/v4l2-dev.h>
23 #include <media/v4l2-ioctl.h>
24 #include <media/v4l2-mc.h>
25 #include <media/videobuf2-dma-contig.h>
26
27 #include "ispvideo.h"
28 #include "isp.h"
29
30
31 /* -----------------------------------------------------------------------------
32 * Helper functions
33 */
34
35 /*
36 * NOTE: When adding new media bus codes, always remember to add
37 * corresponding in-memory formats to the table below!!!
38 *
39 * If there are multiple entries with the same pixelformat but
40 * different media bus codes, then keep those together. Otherwise
41 * isp_video_enum_format() cannot detect duplicate pixelformats.
42 */
43 static struct isp_format_info formats[] = {
44 { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
45 MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
46 V4L2_PIX_FMT_GREY, 8, 1, },
47 { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10,
48 MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8,
49 V4L2_PIX_FMT_Y10, 10, 2, },
50 { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10,
51 MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8,
52 V4L2_PIX_FMT_Y12, 12, 2, },
53 { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
54 MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
55 V4L2_PIX_FMT_SBGGR8, 8, 1, },
56 { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
57 MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
58 V4L2_PIX_FMT_SGBRG8, 8, 1, },
59 { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
60 MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
61 V4L2_PIX_FMT_SGRBG8, 8, 1, },
62 { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
63 MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
64 V4L2_PIX_FMT_SRGGB8, 8, 1, },
65 { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
66 MEDIA_BUS_FMT_SBGGR10_1X10, 0,
67 V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, },
68 { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
69 MEDIA_BUS_FMT_SGBRG10_1X10, 0,
70 V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, },
71 { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
72 MEDIA_BUS_FMT_SGRBG10_1X10, 0,
73 V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, },
74 { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
75 MEDIA_BUS_FMT_SRGGB10_1X10, 0,
76 V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, },
77 { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10,
78 MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8,
79 V4L2_PIX_FMT_SBGGR10, 10, 2, },
80 { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10,
81 MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8,
82 V4L2_PIX_FMT_SGBRG10, 10, 2, },
83 { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10,
84 MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8,
85 V4L2_PIX_FMT_SGRBG10, 10, 2, },
86 { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10,
87 MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8,
88 V4L2_PIX_FMT_SRGGB10, 10, 2, },
89 { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10,
90 MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8,
91 V4L2_PIX_FMT_SBGGR12, 12, 2, },
92 { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10,
93 MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8,
94 V4L2_PIX_FMT_SGBRG12, 12, 2, },
95 { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10,
96 MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8,
97 V4L2_PIX_FMT_SGRBG12, 12, 2, },
98 { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10,
99 MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8,
100 V4L2_PIX_FMT_SRGGB12, 12, 2, },
101 { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16,
102 MEDIA_BUS_FMT_UYVY8_1X16, 0,
103 V4L2_PIX_FMT_UYVY, 16, 2, },
104 { MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8,
105 MEDIA_BUS_FMT_UYVY8_2X8, 0,
106 V4L2_PIX_FMT_UYVY, 8, 2, },
107 { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16,
108 MEDIA_BUS_FMT_YUYV8_1X16, 0,
109 V4L2_PIX_FMT_YUYV, 16, 2, },
110 { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8,
111 MEDIA_BUS_FMT_YUYV8_2X8, 0,
112 V4L2_PIX_FMT_YUYV, 8, 2, },
113 /* Empty entry to catch the unsupported pixel code (0) used by the CCDC
114 * module and avoid NULL pointer dereferences.
115 */
116 { 0, }
117 };
118
omap3isp_video_format_info(u32 code)119 const struct isp_format_info *omap3isp_video_format_info(u32 code)
120 {
121 unsigned int i;
122
123 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
124 if (formats[i].code == code)
125 return &formats[i];
126 }
127
128 return NULL;
129 }
130
131 /*
132 * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
133 * @video: ISP video instance
134 * @mbus: v4l2_mbus_framefmt format (input)
135 * @pix: v4l2_pix_format format (output)
136 *
137 * Fill the output pix structure with information from the input mbus format.
138 * The bytesperline and sizeimage fields are computed from the requested bytes
139 * per line value in the pix format and information from the video instance.
140 *
141 * Return the number of padding bytes at end of line.
142 */
isp_video_mbus_to_pix(const struct isp_video * video,const struct v4l2_mbus_framefmt * mbus,struct v4l2_pix_format * pix)143 static unsigned int isp_video_mbus_to_pix(const struct isp_video *video,
144 const struct v4l2_mbus_framefmt *mbus,
145 struct v4l2_pix_format *pix)
146 {
147 unsigned int bpl = pix->bytesperline;
148 unsigned int min_bpl;
149 unsigned int i;
150
151 memset(pix, 0, sizeof(*pix));
152 pix->width = mbus->width;
153 pix->height = mbus->height;
154
155 for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
156 if (formats[i].code == mbus->code)
157 break;
158 }
159
160 if (WARN_ON(i == ARRAY_SIZE(formats) - 1))
161 return 0;
162
163 min_bpl = pix->width * formats[i].bpp;
164
165 /* Clamp the requested bytes per line value. If the maximum bytes per
166 * line value is zero, the module doesn't support user configurable line
167 * sizes. Override the requested value with the minimum in that case.
168 */
169 if (video->bpl_max)
170 bpl = clamp(bpl, min_bpl, video->bpl_max);
171 else
172 bpl = min_bpl;
173
174 if (!video->bpl_zero_padding || bpl != min_bpl)
175 bpl = ALIGN(bpl, video->bpl_alignment);
176
177 pix->pixelformat = formats[i].pixelformat;
178 pix->bytesperline = bpl;
179 pix->sizeimage = pix->bytesperline * pix->height;
180 pix->colorspace = mbus->colorspace;
181 pix->field = mbus->field;
182
183 return bpl - min_bpl;
184 }
185
isp_video_pix_to_mbus(const struct v4l2_pix_format * pix,struct v4l2_mbus_framefmt * mbus)186 static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix,
187 struct v4l2_mbus_framefmt *mbus)
188 {
189 unsigned int i;
190
191 memset(mbus, 0, sizeof(*mbus));
192 mbus->width = pix->width;
193 mbus->height = pix->height;
194
195 /* Skip the last format in the loop so that it will be selected if no
196 * match is found.
197 */
198 for (i = 0; i < ARRAY_SIZE(formats) - 2; ++i) {
199 if (formats[i].pixelformat == pix->pixelformat)
200 break;
201 }
202
203 mbus->code = formats[i].code;
204 mbus->colorspace = pix->colorspace;
205 mbus->field = pix->field;
206 }
207
208 static struct v4l2_subdev *
isp_video_remote_subdev(struct isp_video * video,u32 * pad)209 isp_video_remote_subdev(struct isp_video *video, u32 *pad)
210 {
211 struct media_pad *remote;
212
213 remote = media_pad_remote_pad_first(&video->pad);
214
215 if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
216 return NULL;
217
218 if (pad)
219 *pad = remote->index;
220
221 return media_entity_to_v4l2_subdev(remote->entity);
222 }
223
224 /* Return a pointer to the ISP video instance at the far end of the pipeline. */
isp_video_get_graph_data(struct isp_video * video,struct isp_pipeline * pipe)225 static int isp_video_get_graph_data(struct isp_video *video,
226 struct isp_pipeline *pipe)
227 {
228 struct media_pipeline_entity_iter iter;
229 struct media_entity *entity;
230 struct isp_video *far_end = NULL;
231 int ret;
232
233 ret = media_pipeline_entity_iter_init(&pipe->pipe, &iter);
234 if (ret)
235 return ret;
236
237 media_pipeline_for_each_entity(&pipe->pipe, &iter, entity) {
238 struct isp_video *__video;
239
240 media_entity_enum_set(&pipe->ent_enum, entity);
241
242 if (far_end != NULL)
243 continue;
244
245 if (entity == &video->video.entity)
246 continue;
247
248 if (!is_media_entity_v4l2_video_device(entity))
249 continue;
250
251 __video = to_isp_video(media_entity_to_video_device(entity));
252 if (__video->type != video->type)
253 far_end = __video;
254 }
255
256 media_pipeline_entity_iter_cleanup(&iter);
257
258 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
259 pipe->input = far_end;
260 pipe->output = video;
261 } else {
262 if (far_end == NULL)
263 return -EPIPE;
264
265 pipe->input = video;
266 pipe->output = far_end;
267 }
268
269 return 0;
270 }
271
272 static int
__isp_video_get_format(struct isp_video * video,struct v4l2_format * format)273 __isp_video_get_format(struct isp_video *video, struct v4l2_format *format)
274 {
275 struct v4l2_subdev_format fmt = {
276 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
277 };
278 struct v4l2_subdev *subdev;
279 u32 pad;
280 int ret;
281
282 subdev = isp_video_remote_subdev(video, &pad);
283 if (subdev == NULL)
284 return -EINVAL;
285
286 fmt.pad = pad;
287
288 mutex_lock(&video->mutex);
289 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
290 mutex_unlock(&video->mutex);
291
292 if (ret)
293 return ret;
294
295 format->type = video->type;
296 return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
297 }
298
299 static int
isp_video_check_format(struct isp_video * video,struct isp_video_fh * vfh)300 isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
301 {
302 struct v4l2_format format;
303 int ret;
304
305 memcpy(&format, &vfh->format, sizeof(format));
306 ret = __isp_video_get_format(video, &format);
307 if (ret < 0)
308 return ret;
309
310 if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
311 vfh->format.fmt.pix.height != format.fmt.pix.height ||
312 vfh->format.fmt.pix.width != format.fmt.pix.width ||
313 vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
314 vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage ||
315 vfh->format.fmt.pix.field != format.fmt.pix.field)
316 return -EINVAL;
317
318 return 0;
319 }
320
321 /* -----------------------------------------------------------------------------
322 * Video queue operations
323 */
324
isp_video_queue_setup(struct vb2_queue * queue,unsigned int * count,unsigned int * num_planes,unsigned int sizes[],struct device * alloc_devs[])325 static int isp_video_queue_setup(struct vb2_queue *queue,
326 unsigned int *count, unsigned int *num_planes,
327 unsigned int sizes[], struct device *alloc_devs[])
328 {
329 struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
330 struct isp_video *video = vfh->video;
331
332 if (*num_planes) {
333 if (*num_planes != 1)
334 return -EINVAL;
335 if (sizes[0] < vfh->format.fmt.pix.sizeimage)
336 return -EINVAL;
337 return 0;
338 }
339 *num_planes = 1;
340
341 sizes[0] = vfh->format.fmt.pix.sizeimage;
342 if (sizes[0] == 0)
343 return -EINVAL;
344
345 *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
346
347 return 0;
348 }
349
isp_video_buffer_prepare(struct vb2_buffer * buf)350 static int isp_video_buffer_prepare(struct vb2_buffer *buf)
351 {
352 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
353 struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
354 unsigned int size = vfh->format.fmt.pix.sizeimage;
355 struct isp_buffer *buffer = to_isp_buffer(vbuf);
356 struct isp_video *video = vfh->video;
357 dma_addr_t addr;
358
359 /* Refuse to prepare the buffer is the video node has registered an
360 * error. We don't need to take any lock here as the operation is
361 * inherently racy. The authoritative check will be performed in the
362 * queue handler, which can't return an error, this check is just a best
363 * effort to notify userspace as early as possible.
364 */
365 if (unlikely(video->error))
366 return -EIO;
367
368 addr = vb2_dma_contig_plane_dma_addr(buf, 0);
369 if (!IS_ALIGNED(addr, 32)) {
370 dev_dbg(video->isp->dev,
371 "Buffer address must be aligned to 32 bytes boundary.\n");
372 return -EINVAL;
373 }
374
375 if (vb2_plane_size(&buffer->vb.vb2_buf, 0) < size) {
376 dev_dbg(video->isp->dev,
377 "data will not fit into plane (%lu < %u)\n",
378 vb2_plane_size(&buffer->vb.vb2_buf, 0), size);
379 return -EINVAL;
380 }
381 vb2_set_plane_payload(&buffer->vb.vb2_buf, 0, size);
382 buffer->dma = addr;
383
384 return 0;
385 }
386
387 /*
388 * isp_video_buffer_queue - Add buffer to streaming queue
389 * @buf: Video buffer
390 *
391 * In memory-to-memory mode, start streaming on the pipeline if buffers are
392 * queued on both the input and the output, if the pipeline isn't already busy.
393 * If the pipeline is busy, it will be restarted in the output module interrupt
394 * handler.
395 */
isp_video_buffer_queue(struct vb2_buffer * buf)396 static void isp_video_buffer_queue(struct vb2_buffer *buf)
397 {
398 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
399 struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
400 struct isp_buffer *buffer = to_isp_buffer(vbuf);
401 struct isp_video *video = vfh->video;
402 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
403 enum isp_pipeline_state state;
404 unsigned long flags;
405 unsigned int empty;
406 unsigned int start;
407
408 spin_lock_irqsave(&video->irqlock, flags);
409
410 if (unlikely(video->error)) {
411 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_ERROR);
412 spin_unlock_irqrestore(&video->irqlock, flags);
413 return;
414 }
415
416 empty = list_empty(&video->dmaqueue);
417 list_add_tail(&buffer->irqlist, &video->dmaqueue);
418
419 spin_unlock_irqrestore(&video->irqlock, flags);
420
421 if (empty) {
422 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
423 state = ISP_PIPELINE_QUEUE_OUTPUT;
424 else
425 state = ISP_PIPELINE_QUEUE_INPUT;
426
427 spin_lock_irqsave(&pipe->lock, flags);
428 pipe->state |= state;
429 video->ops->queue(video, buffer);
430 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
431
432 start = isp_pipeline_ready(pipe);
433 if (start)
434 pipe->state |= ISP_PIPELINE_STREAM;
435 spin_unlock_irqrestore(&pipe->lock, flags);
436
437 if (start)
438 omap3isp_pipeline_set_stream(pipe,
439 ISP_PIPELINE_STREAM_SINGLESHOT);
440 }
441 }
442
443 /*
444 * omap3isp_video_return_buffers - Return all queued buffers to videobuf2
445 * @video: ISP video object
446 * @state: new state for the returned buffers
447 *
448 * Return all buffers queued on the video node to videobuf2 in the given state.
449 * The buffer state should be VB2_BUF_STATE_QUEUED if called due to an error
450 * when starting the stream, or VB2_BUF_STATE_ERROR otherwise.
451 *
452 * The function must be called with the video irqlock held.
453 */
omap3isp_video_return_buffers(struct isp_video * video,enum vb2_buffer_state state)454 static void omap3isp_video_return_buffers(struct isp_video *video,
455 enum vb2_buffer_state state)
456 {
457 while (!list_empty(&video->dmaqueue)) {
458 struct isp_buffer *buf;
459
460 buf = list_first_entry(&video->dmaqueue,
461 struct isp_buffer, irqlist);
462 list_del(&buf->irqlist);
463 vb2_buffer_done(&buf->vb.vb2_buf, state);
464 }
465 }
466
isp_video_start_streaming(struct vb2_queue * queue,unsigned int count)467 static int isp_video_start_streaming(struct vb2_queue *queue,
468 unsigned int count)
469 {
470 struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
471 struct isp_video *video = vfh->video;
472 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
473 unsigned long flags;
474 int ret;
475
476 /* In sensor-to-memory mode, the stream can be started synchronously
477 * to the stream on command. In memory-to-memory mode, it will be
478 * started when buffers are queued on both the input and output.
479 */
480 if (pipe->input)
481 return 0;
482
483 ret = omap3isp_pipeline_set_stream(pipe,
484 ISP_PIPELINE_STREAM_CONTINUOUS);
485 if (ret < 0) {
486 spin_lock_irqsave(&video->irqlock, flags);
487 omap3isp_video_return_buffers(video, VB2_BUF_STATE_QUEUED);
488 spin_unlock_irqrestore(&video->irqlock, flags);
489 return ret;
490 }
491
492 spin_lock_irqsave(&video->irqlock, flags);
493 if (list_empty(&video->dmaqueue))
494 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
495 spin_unlock_irqrestore(&video->irqlock, flags);
496
497 return 0;
498 }
499
500 static const struct vb2_ops isp_video_queue_ops = {
501 .queue_setup = isp_video_queue_setup,
502 .buf_prepare = isp_video_buffer_prepare,
503 .buf_queue = isp_video_buffer_queue,
504 .start_streaming = isp_video_start_streaming,
505 };
506
507 /*
508 * omap3isp_video_buffer_next - Complete the current buffer and return the next
509 * @video: ISP video object
510 *
511 * Remove the current video buffer from the DMA queue and fill its timestamp and
512 * field count before handing it back to videobuf2.
513 *
514 * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no
515 * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
516 * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE.
517 *
518 * The DMA queue is expected to contain at least one buffer.
519 *
520 * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
521 * empty.
522 */
omap3isp_video_buffer_next(struct isp_video * video)523 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
524 {
525 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
526 enum vb2_buffer_state vb_state;
527 struct isp_buffer *buf;
528 unsigned long flags;
529
530 spin_lock_irqsave(&video->irqlock, flags);
531 if (WARN_ON(list_empty(&video->dmaqueue))) {
532 spin_unlock_irqrestore(&video->irqlock, flags);
533 return NULL;
534 }
535
536 buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
537 irqlist);
538 list_del(&buf->irqlist);
539 spin_unlock_irqrestore(&video->irqlock, flags);
540
541 buf->vb.vb2_buf.timestamp = ktime_get_ns();
542
543 /* Do frame number propagation only if this is the output video node.
544 * Frame number either comes from the CSI receivers or it gets
545 * incremented here if H3A is not active.
546 * Note: There is no guarantee that the output buffer will finish
547 * first, so the input number might lag behind by 1 in some cases.
548 */
549 if (video == pipe->output && !pipe->do_propagation)
550 buf->vb.sequence =
551 atomic_inc_return(&pipe->frame_number);
552 else
553 buf->vb.sequence = atomic_read(&pipe->frame_number);
554
555 if (pipe->field != V4L2_FIELD_NONE)
556 buf->vb.sequence /= 2;
557
558 buf->vb.field = pipe->field;
559
560 /* Report pipeline errors to userspace on the capture device side. */
561 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
562 vb_state = VB2_BUF_STATE_ERROR;
563 pipe->error = false;
564 } else {
565 vb_state = VB2_BUF_STATE_DONE;
566 }
567
568 vb2_buffer_done(&buf->vb.vb2_buf, vb_state);
569
570 spin_lock_irqsave(&video->irqlock, flags);
571
572 if (list_empty(&video->dmaqueue)) {
573 enum isp_pipeline_state state;
574
575 spin_unlock_irqrestore(&video->irqlock, flags);
576
577 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
578 state = ISP_PIPELINE_QUEUE_OUTPUT
579 | ISP_PIPELINE_STREAM;
580 else
581 state = ISP_PIPELINE_QUEUE_INPUT
582 | ISP_PIPELINE_STREAM;
583
584 spin_lock_irqsave(&pipe->lock, flags);
585 pipe->state &= ~state;
586 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
587 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
588 spin_unlock_irqrestore(&pipe->lock, flags);
589 return NULL;
590 }
591
592 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
593 spin_lock(&pipe->lock);
594 pipe->state &= ~ISP_PIPELINE_STREAM;
595 spin_unlock(&pipe->lock);
596 }
597
598 buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
599 irqlist);
600
601 spin_unlock_irqrestore(&video->irqlock, flags);
602
603 return buf;
604 }
605
606 /*
607 * omap3isp_video_cancel_stream - Cancel stream on a video node
608 * @video: ISP video object
609 *
610 * Cancelling a stream returns all buffers queued on the video node to videobuf2
611 * in the erroneous state and makes sure no new buffer can be queued.
612 */
omap3isp_video_cancel_stream(struct isp_video * video)613 void omap3isp_video_cancel_stream(struct isp_video *video)
614 {
615 unsigned long flags;
616
617 spin_lock_irqsave(&video->irqlock, flags);
618 omap3isp_video_return_buffers(video, VB2_BUF_STATE_ERROR);
619 video->error = true;
620 spin_unlock_irqrestore(&video->irqlock, flags);
621 }
622
623 /*
624 * omap3isp_video_resume - Perform resume operation on the buffers
625 * @video: ISP video object
626 * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
627 *
628 * This function is intended to be used on suspend/resume scenario. It
629 * requests video queue layer to discard buffers marked as DONE if it's in
630 * continuous mode and requests ISP modules to queue again the ACTIVE buffer
631 * if there's any.
632 */
omap3isp_video_resume(struct isp_video * video,int continuous)633 void omap3isp_video_resume(struct isp_video *video, int continuous)
634 {
635 struct isp_buffer *buf = NULL;
636
637 if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
638 mutex_lock(&video->queue_lock);
639 vb2_discard_done(video->queue);
640 mutex_unlock(&video->queue_lock);
641 }
642
643 if (!list_empty(&video->dmaqueue)) {
644 buf = list_first_entry(&video->dmaqueue,
645 struct isp_buffer, irqlist);
646 video->ops->queue(video, buf);
647 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
648 } else {
649 if (continuous)
650 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
651 }
652 }
653
654 /* -----------------------------------------------------------------------------
655 * V4L2 ioctls
656 */
657
658 static int
isp_video_querycap(struct file * file,void * fh,struct v4l2_capability * cap)659 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
660 {
661 struct isp_video *video = video_drvdata(file);
662
663 strscpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
664 strscpy(cap->card, video->video.name, sizeof(cap->card));
665
666 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
667 | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS | V4L2_CAP_IO_MC;
668
669 return 0;
670 }
671
672 static int
isp_video_enum_format(struct file * file,void * fh,struct v4l2_fmtdesc * f)673 isp_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
674 {
675 struct isp_video *video = video_drvdata(file);
676 unsigned int i, j;
677
678 if (f->type != video->type)
679 return -EINVAL;
680
681 for (i = 0, j = 0; i < ARRAY_SIZE(formats); i++) {
682 /* Weed out duplicate pixelformats with different mbus codes */
683 if (!f->mbus_code && i &&
684 formats[i - 1].pixelformat == formats[i].pixelformat)
685 continue;
686 if (f->mbus_code && formats[i].code != f->mbus_code)
687 continue;
688
689 if (j == f->index) {
690 f->pixelformat = formats[i].pixelformat;
691 return 0;
692 }
693 j++;
694 }
695
696 return -EINVAL;
697 }
698
699 static int
isp_video_get_format(struct file * file,void * fh,struct v4l2_format * format)700 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
701 {
702 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
703 struct isp_video *video = video_drvdata(file);
704
705 if (format->type != video->type)
706 return -EINVAL;
707
708 mutex_lock(&video->mutex);
709 *format = vfh->format;
710 mutex_unlock(&video->mutex);
711
712 return 0;
713 }
714
715 static int
isp_video_try_format(struct file * file,void * fh,struct v4l2_format * format)716 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
717 {
718 struct isp_video *video = video_drvdata(file);
719 struct v4l2_subdev_format fmt = {
720 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
721 };
722 struct v4l2_subdev *subdev;
723 u32 pad;
724 int ret;
725
726 if (format->type != video->type)
727 return -EINVAL;
728
729 /* Replace unsupported field orders with sane defaults. */
730 switch (format->fmt.pix.field) {
731 case V4L2_FIELD_NONE:
732 /* Progressive is supported everywhere. */
733 break;
734 case V4L2_FIELD_ALTERNATE:
735 /* ALTERNATE is not supported on output nodes. */
736 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
737 format->fmt.pix.field = V4L2_FIELD_NONE;
738 break;
739 case V4L2_FIELD_INTERLACED:
740 /* The ISP has no concept of video standard, select the
741 * top-bottom order when the unqualified interlaced order is
742 * requested.
743 */
744 format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
745 fallthrough;
746 case V4L2_FIELD_INTERLACED_TB:
747 case V4L2_FIELD_INTERLACED_BT:
748 /* Interlaced orders are only supported at the CCDC output. */
749 if (video != &video->isp->isp_ccdc.video_out)
750 format->fmt.pix.field = V4L2_FIELD_NONE;
751 break;
752 case V4L2_FIELD_TOP:
753 case V4L2_FIELD_BOTTOM:
754 case V4L2_FIELD_SEQ_TB:
755 case V4L2_FIELD_SEQ_BT:
756 default:
757 /* All other field orders are currently unsupported, default to
758 * progressive.
759 */
760 format->fmt.pix.field = V4L2_FIELD_NONE;
761 break;
762 }
763
764 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
765 isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
766 isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
767 return 0;
768 }
769
770 subdev = isp_video_remote_subdev(video, &pad);
771 if (subdev == NULL)
772 return -EINVAL;
773
774 isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
775
776 fmt.pad = pad;
777 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
778 if (ret)
779 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
780
781 isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
782 return 0;
783 }
784
785 static int
isp_video_set_format(struct file * file,void * fh,struct v4l2_format * format)786 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
787 {
788 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
789 struct isp_video *video = video_drvdata(file);
790 int ret;
791
792 ret = isp_video_try_format(file, fh, format);
793 if (ret)
794 return ret;
795
796 mutex_lock(&video->mutex);
797 vfh->format = *format;
798 mutex_unlock(&video->mutex);
799
800 return 0;
801 }
802
803 static int
isp_video_get_selection(struct file * file,void * fh,struct v4l2_selection * sel)804 isp_video_get_selection(struct file *file, void *fh, struct v4l2_selection *sel)
805 {
806 struct isp_video *video = video_drvdata(file);
807 struct v4l2_subdev_format format = {
808 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
809 };
810 struct v4l2_subdev *subdev;
811 struct v4l2_subdev_selection sdsel = {
812 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
813 .target = sel->target,
814 };
815 u32 pad;
816 int ret;
817
818 switch (sel->target) {
819 case V4L2_SEL_TGT_CROP:
820 case V4L2_SEL_TGT_CROP_BOUNDS:
821 case V4L2_SEL_TGT_CROP_DEFAULT:
822 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
823 return -EINVAL;
824 break;
825 case V4L2_SEL_TGT_COMPOSE:
826 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
827 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
828 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
829 return -EINVAL;
830 break;
831 default:
832 return -EINVAL;
833 }
834 subdev = isp_video_remote_subdev(video, &pad);
835 if (subdev == NULL)
836 return -EINVAL;
837
838 /* Try the get selection operation first and fallback to get format if not
839 * implemented.
840 */
841 sdsel.pad = pad;
842 ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
843 if (!ret)
844 sel->r = sdsel.r;
845 if (ret != -ENOIOCTLCMD)
846 return ret;
847
848 format.pad = pad;
849 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
850 if (ret < 0)
851 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
852
853 sel->r.left = 0;
854 sel->r.top = 0;
855 sel->r.width = format.format.width;
856 sel->r.height = format.format.height;
857
858 return 0;
859 }
860
861 static int
isp_video_set_selection(struct file * file,void * fh,struct v4l2_selection * sel)862 isp_video_set_selection(struct file *file, void *fh, struct v4l2_selection *sel)
863 {
864 struct isp_video *video = video_drvdata(file);
865 struct v4l2_subdev *subdev;
866 struct v4l2_subdev_selection sdsel = {
867 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
868 .target = sel->target,
869 .flags = sel->flags,
870 .r = sel->r,
871 };
872 u32 pad;
873 int ret;
874
875 switch (sel->target) {
876 case V4L2_SEL_TGT_CROP:
877 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
878 return -EINVAL;
879 break;
880 case V4L2_SEL_TGT_COMPOSE:
881 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
882 return -EINVAL;
883 break;
884 default:
885 return -EINVAL;
886 }
887 subdev = isp_video_remote_subdev(video, &pad);
888 if (subdev == NULL)
889 return -EINVAL;
890
891 sdsel.pad = pad;
892 mutex_lock(&video->mutex);
893 ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel);
894 mutex_unlock(&video->mutex);
895 if (!ret)
896 sel->r = sdsel.r;
897
898 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
899 }
900
901 static int
isp_video_get_param(struct file * file,void * fh,struct v4l2_streamparm * a)902 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
903 {
904 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
905 struct isp_video *video = video_drvdata(file);
906
907 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
908 video->type != a->type)
909 return -EINVAL;
910
911 memset(a, 0, sizeof(*a));
912 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
913 a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
914 a->parm.output.timeperframe = vfh->timeperframe;
915
916 return 0;
917 }
918
919 static int
isp_video_set_param(struct file * file,void * fh,struct v4l2_streamparm * a)920 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
921 {
922 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
923 struct isp_video *video = video_drvdata(file);
924
925 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
926 video->type != a->type)
927 return -EINVAL;
928
929 if (a->parm.output.timeperframe.denominator == 0)
930 a->parm.output.timeperframe.denominator = 1;
931 if (a->parm.output.timeperframe.numerator == 0)
932 a->parm.output.timeperframe.numerator = 1;
933
934 a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
935 vfh->timeperframe = a->parm.output.timeperframe;
936
937 return 0;
938 }
939
940 static int
isp_video_reqbufs(struct file * file,void * fh,struct v4l2_requestbuffers * rb)941 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
942 {
943 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
944 struct isp_video *video = video_drvdata(file);
945 int ret;
946
947 mutex_lock(&video->queue_lock);
948 ret = vb2_reqbufs(&vfh->queue, rb);
949 mutex_unlock(&video->queue_lock);
950
951 return ret;
952 }
953
954 static int
isp_video_create_bufs(struct file * file,void * fh,struct v4l2_create_buffers * p)955 isp_video_create_bufs(struct file *file, void *fh, struct v4l2_create_buffers *p)
956 {
957 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
958 struct isp_video *video = video_drvdata(file);
959 int ret;
960
961 mutex_lock(&video->queue_lock);
962 ret = vb2_create_bufs(&vfh->queue, p);
963 mutex_unlock(&video->queue_lock);
964
965 return ret;
966 }
967
968 static int
isp_video_querybuf(struct file * file,void * fh,struct v4l2_buffer * b)969 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
970 {
971 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
972 struct isp_video *video = video_drvdata(file);
973 int ret;
974
975 mutex_lock(&video->queue_lock);
976 ret = vb2_querybuf(&vfh->queue, b);
977 mutex_unlock(&video->queue_lock);
978
979 return ret;
980 }
981
982 static int
isp_video_prepare_buf(struct file * file,void * fh,struct v4l2_buffer * b)983 isp_video_prepare_buf(struct file *file, void *fh, struct v4l2_buffer *b)
984 {
985 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
986 struct isp_video *video = video_drvdata(file);
987 int ret;
988
989 mutex_lock(&video->queue_lock);
990 ret = vb2_prepare_buf(&vfh->queue, video->video.v4l2_dev->mdev, b);
991 mutex_unlock(&video->queue_lock);
992
993 return ret;
994 }
995
996 static int
isp_video_qbuf(struct file * file,void * fh,struct v4l2_buffer * b)997 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
998 {
999 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
1000 struct isp_video *video = video_drvdata(file);
1001 int ret;
1002
1003 mutex_lock(&video->queue_lock);
1004 ret = vb2_qbuf(&vfh->queue, video->video.v4l2_dev->mdev, b);
1005 mutex_unlock(&video->queue_lock);
1006
1007 return ret;
1008 }
1009
1010 static int
isp_video_dqbuf(struct file * file,void * fh,struct v4l2_buffer * b)1011 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
1012 {
1013 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
1014 struct isp_video *video = video_drvdata(file);
1015 int ret;
1016
1017 mutex_lock(&video->queue_lock);
1018 ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
1019 mutex_unlock(&video->queue_lock);
1020
1021 return ret;
1022 }
1023
isp_video_check_external_subdevs(struct isp_video * video,struct isp_pipeline * pipe)1024 static int isp_video_check_external_subdevs(struct isp_video *video,
1025 struct isp_pipeline *pipe)
1026 {
1027 struct isp_device *isp = video->isp;
1028 struct media_entity *ents[] = {
1029 &isp->isp_csi2a.subdev.entity,
1030 &isp->isp_csi2c.subdev.entity,
1031 &isp->isp_ccp2.subdev.entity,
1032 &isp->isp_ccdc.subdev.entity
1033 };
1034 struct media_pad *source_pad;
1035 struct media_entity *source = NULL;
1036 struct media_entity *sink;
1037 struct v4l2_subdev_format fmt = {
1038 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1039 };
1040 struct v4l2_ext_controls ctrls;
1041 struct v4l2_ext_control ctrl;
1042 unsigned int i;
1043 int ret;
1044
1045 /* Memory-to-memory pipelines have no external subdev. */
1046 if (pipe->input != NULL)
1047 return 0;
1048
1049 for (i = 0; i < ARRAY_SIZE(ents); i++) {
1050 /* Is the entity part of the pipeline? */
1051 if (!media_entity_enum_test(&pipe->ent_enum, ents[i]))
1052 continue;
1053
1054 /* ISP entities have always sink pad == 0. Find source. */
1055 source_pad = media_pad_remote_pad_first(&ents[i]->pads[0]);
1056 if (source_pad == NULL)
1057 continue;
1058
1059 source = source_pad->entity;
1060 sink = ents[i];
1061 break;
1062 }
1063
1064 if (!source) {
1065 dev_warn(isp->dev, "can't find source, failing now\n");
1066 return -EINVAL;
1067 }
1068
1069 if (!is_media_entity_v4l2_subdev(source))
1070 return 0;
1071
1072 pipe->external = media_entity_to_v4l2_subdev(source);
1073
1074 fmt.pad = source_pad->index;
1075 ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
1076 pad, get_fmt, NULL, &fmt);
1077 if (unlikely(ret < 0)) {
1078 dev_warn(isp->dev, "get_fmt returned null!\n");
1079 return ret;
1080 }
1081
1082 pipe->external_width =
1083 omap3isp_video_format_info(fmt.format.code)->width;
1084
1085 memset(&ctrls, 0, sizeof(ctrls));
1086 memset(&ctrl, 0, sizeof(ctrl));
1087
1088 ctrl.id = V4L2_CID_PIXEL_RATE;
1089
1090 ctrls.count = 1;
1091 ctrls.controls = &ctrl;
1092 ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &video->video,
1093 NULL, &ctrls);
1094 if (ret < 0) {
1095 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
1096 pipe->external->name);
1097 return ret;
1098 }
1099
1100 pipe->external_rate = ctrl.value64;
1101
1102 if (media_entity_enum_test(&pipe->ent_enum,
1103 &isp->isp_ccdc.subdev.entity)) {
1104 unsigned int rate = UINT_MAX;
1105 /*
1106 * Check that maximum allowed CCDC pixel rate isn't
1107 * exceeded by the pixel rate.
1108 */
1109 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
1110 if (pipe->external_rate > rate)
1111 return -ENOSPC;
1112 }
1113
1114 return 0;
1115 }
1116
1117 /*
1118 * Stream management
1119 *
1120 * Every ISP pipeline has a single input and a single output. The input can be
1121 * either a sensor or a video node. The output is always a video node.
1122 *
1123 * As every pipeline has an output video node, the ISP video objects at the
1124 * pipeline output stores the pipeline state. It tracks the streaming state of
1125 * both the input and output, as well as the availability of buffers.
1126 *
1127 * In sensor-to-memory mode, frames are always available at the pipeline input.
1128 * Starting the sensor usually requires I2C transfers and must be done in
1129 * interruptible context. The pipeline is started and stopped synchronously
1130 * to the stream on/off commands. All modules in the pipeline will get their
1131 * subdev set stream handler called. The module at the end of the pipeline must
1132 * delay starting the hardware until buffers are available at its output.
1133 *
1134 * In memory-to-memory mode, starting/stopping the stream requires
1135 * synchronization between the input and output. ISP modules can't be stopped
1136 * in the middle of a frame, and at least some of the modules seem to become
1137 * busy as soon as they're started, even if they don't receive a frame start
1138 * event. For that reason frames need to be processed in single-shot mode. The
1139 * driver needs to wait until a frame is completely processed and written to
1140 * memory before restarting the pipeline for the next frame. Pipelined
1141 * processing might be possible but requires more testing.
1142 *
1143 * Stream start must be delayed until buffers are available at both the input
1144 * and output. The pipeline must be started in the vb2 queue callback with
1145 * the buffers queue spinlock held. The modules subdev set stream operation must
1146 * not sleep.
1147 */
1148 static int
isp_video_streamon(struct file * file,void * fh,enum v4l2_buf_type type)1149 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1150 {
1151 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
1152 struct isp_video *video = video_drvdata(file);
1153 enum isp_pipeline_state state;
1154 struct isp_pipeline *pipe;
1155 unsigned long flags;
1156 int ret;
1157
1158 if (type != video->type)
1159 return -EINVAL;
1160
1161 mutex_lock(&video->stream_lock);
1162
1163 /* Start streaming on the pipeline. No link touching an entity in the
1164 * pipeline can be activated or deactivated once streaming is started.
1165 */
1166 pipe = to_isp_pipeline(&video->video.entity) ? : &video->pipe;
1167
1168 ret = media_entity_enum_init(&pipe->ent_enum, &video->isp->media_dev);
1169 if (ret)
1170 goto err_enum_init;
1171
1172 /* TODO: Implement PM QoS */
1173 pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
1174 pipe->max_rate = pipe->l3_ick;
1175
1176 ret = video_device_pipeline_start(&video->video, &pipe->pipe);
1177 if (ret < 0)
1178 goto err_pipeline_start;
1179
1180 /* Verify that the currently configured format matches the output of
1181 * the connected subdev.
1182 */
1183 ret = isp_video_check_format(video, vfh);
1184 if (ret < 0)
1185 goto err_check_format;
1186
1187 video->bpl_padding = ret;
1188 video->bpl_value = vfh->format.fmt.pix.bytesperline;
1189
1190 ret = isp_video_get_graph_data(video, pipe);
1191 if (ret < 0)
1192 goto err_check_format;
1193
1194 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1195 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1196 else
1197 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1198
1199 ret = isp_video_check_external_subdevs(video, pipe);
1200 if (ret < 0)
1201 goto err_check_format;
1202
1203 pipe->error = false;
1204
1205 spin_lock_irqsave(&pipe->lock, flags);
1206 pipe->state &= ~ISP_PIPELINE_STREAM;
1207 pipe->state |= state;
1208 spin_unlock_irqrestore(&pipe->lock, flags);
1209
1210 /* Set the maximum time per frame as the value requested by userspace.
1211 * This is a soft limit that can be overridden if the hardware doesn't
1212 * support the request limit.
1213 */
1214 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1215 pipe->max_timeperframe = vfh->timeperframe;
1216
1217 video->queue = &vfh->queue;
1218 INIT_LIST_HEAD(&video->dmaqueue);
1219 atomic_set(&pipe->frame_number, -1);
1220 pipe->field = vfh->format.fmt.pix.field;
1221
1222 mutex_lock(&video->queue_lock);
1223 ret = vb2_streamon(&vfh->queue, type);
1224 mutex_unlock(&video->queue_lock);
1225 if (ret < 0)
1226 goto err_check_format;
1227
1228 mutex_unlock(&video->stream_lock);
1229
1230 return 0;
1231
1232 err_check_format:
1233 video_device_pipeline_stop(&video->video);
1234 err_pipeline_start:
1235 /* TODO: Implement PM QoS */
1236 /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1237 * will get triggered the next time the CCDC is powered up will try to
1238 * access buffers that might have been freed but still present in the
1239 * DMA queue. This can easily get triggered if the above
1240 * omap3isp_pipeline_set_stream() call fails on a system with a
1241 * free-running sensor.
1242 */
1243 INIT_LIST_HEAD(&video->dmaqueue);
1244 video->queue = NULL;
1245
1246 media_entity_enum_cleanup(&pipe->ent_enum);
1247
1248 err_enum_init:
1249 mutex_unlock(&video->stream_lock);
1250
1251 return ret;
1252 }
1253
1254 static int
isp_video_streamoff(struct file * file,void * fh,enum v4l2_buf_type type)1255 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1256 {
1257 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
1258 struct isp_video *video = video_drvdata(file);
1259 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1260 enum isp_pipeline_state state;
1261 unsigned int streaming;
1262 unsigned long flags;
1263
1264 if (type != video->type)
1265 return -EINVAL;
1266
1267 mutex_lock(&video->stream_lock);
1268
1269 /* Make sure we're not streaming yet. */
1270 mutex_lock(&video->queue_lock);
1271 streaming = vb2_is_streaming(&vfh->queue);
1272 mutex_unlock(&video->queue_lock);
1273
1274 if (!streaming)
1275 goto done;
1276
1277 /* Update the pipeline state. */
1278 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1279 state = ISP_PIPELINE_STREAM_OUTPUT
1280 | ISP_PIPELINE_QUEUE_OUTPUT;
1281 else
1282 state = ISP_PIPELINE_STREAM_INPUT
1283 | ISP_PIPELINE_QUEUE_INPUT;
1284
1285 spin_lock_irqsave(&pipe->lock, flags);
1286 pipe->state &= ~state;
1287 spin_unlock_irqrestore(&pipe->lock, flags);
1288
1289 /* Stop the stream. */
1290 omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1291 omap3isp_video_cancel_stream(video);
1292
1293 mutex_lock(&video->queue_lock);
1294 vb2_streamoff(&vfh->queue, type);
1295 mutex_unlock(&video->queue_lock);
1296 video->queue = NULL;
1297 video->error = false;
1298
1299 /* TODO: Implement PM QoS */
1300 video_device_pipeline_stop(&video->video);
1301
1302 media_entity_enum_cleanup(&pipe->ent_enum);
1303
1304 done:
1305 mutex_unlock(&video->stream_lock);
1306 return 0;
1307 }
1308
1309 static int
isp_video_enum_input(struct file * file,void * fh,struct v4l2_input * input)1310 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1311 {
1312 if (input->index > 0)
1313 return -EINVAL;
1314
1315 strscpy(input->name, "camera", sizeof(input->name));
1316 input->type = V4L2_INPUT_TYPE_CAMERA;
1317
1318 return 0;
1319 }
1320
1321 static int
isp_video_g_input(struct file * file,void * fh,unsigned int * input)1322 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1323 {
1324 *input = 0;
1325
1326 return 0;
1327 }
1328
1329 static int
isp_video_s_input(struct file * file,void * fh,unsigned int input)1330 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1331 {
1332 return input == 0 ? 0 : -EINVAL;
1333 }
1334
1335 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1336 .vidioc_querycap = isp_video_querycap,
1337 .vidioc_enum_fmt_vid_cap = isp_video_enum_format,
1338 .vidioc_g_fmt_vid_cap = isp_video_get_format,
1339 .vidioc_s_fmt_vid_cap = isp_video_set_format,
1340 .vidioc_try_fmt_vid_cap = isp_video_try_format,
1341 .vidioc_enum_fmt_vid_out = isp_video_enum_format,
1342 .vidioc_g_fmt_vid_out = isp_video_get_format,
1343 .vidioc_s_fmt_vid_out = isp_video_set_format,
1344 .vidioc_try_fmt_vid_out = isp_video_try_format,
1345 .vidioc_g_selection = isp_video_get_selection,
1346 .vidioc_s_selection = isp_video_set_selection,
1347 .vidioc_g_parm = isp_video_get_param,
1348 .vidioc_s_parm = isp_video_set_param,
1349 .vidioc_reqbufs = isp_video_reqbufs,
1350 .vidioc_create_bufs = isp_video_create_bufs,
1351 .vidioc_querybuf = isp_video_querybuf,
1352 .vidioc_prepare_buf = isp_video_prepare_buf,
1353 .vidioc_qbuf = isp_video_qbuf,
1354 .vidioc_dqbuf = isp_video_dqbuf,
1355 .vidioc_streamon = isp_video_streamon,
1356 .vidioc_streamoff = isp_video_streamoff,
1357 .vidioc_enum_input = isp_video_enum_input,
1358 .vidioc_g_input = isp_video_g_input,
1359 .vidioc_s_input = isp_video_s_input,
1360 };
1361
1362 /* -----------------------------------------------------------------------------
1363 * V4L2 file operations
1364 */
1365
isp_video_open(struct file * file)1366 static int isp_video_open(struct file *file)
1367 {
1368 struct isp_video *video = video_drvdata(file);
1369 struct v4l2_mbus_framefmt fmt;
1370 struct isp_video_fh *handle;
1371 struct vb2_queue *queue;
1372 int ret = 0;
1373
1374 handle = kzalloc_obj(*handle);
1375 if (handle == NULL)
1376 return -ENOMEM;
1377
1378 v4l2_fh_init(&handle->vfh, &video->video);
1379 v4l2_fh_add(&handle->vfh, file);
1380
1381 /* If this is the first user, initialise the pipeline. */
1382 if (omap3isp_get(video->isp) == NULL) {
1383 ret = -EBUSY;
1384 goto done;
1385 }
1386
1387 ret = v4l2_pipeline_pm_get(&video->video.entity);
1388 if (ret < 0) {
1389 omap3isp_put(video->isp);
1390 goto done;
1391 }
1392
1393 queue = &handle->queue;
1394 queue->type = video->type;
1395 queue->io_modes = VB2_MMAP | VB2_USERPTR;
1396 queue->drv_priv = handle;
1397 queue->ops = &isp_video_queue_ops;
1398 queue->mem_ops = &vb2_dma_contig_memops;
1399 queue->buf_struct_size = sizeof(struct isp_buffer);
1400 queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1401 queue->dev = video->isp->dev;
1402 queue->lock = &video->queue_lock;
1403
1404 ret = vb2_queue_init(&handle->queue);
1405 if (ret < 0) {
1406 omap3isp_put(video->isp);
1407 goto done;
1408 }
1409
1410 memset(&handle->format, 0, sizeof(handle->format));
1411 handle->format.type = video->type;
1412 handle->format.fmt.pix.width = 720;
1413 handle->format.fmt.pix.height = 480;
1414 handle->format.fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1415 handle->format.fmt.pix.field = V4L2_FIELD_NONE;
1416 handle->format.fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
1417 isp_video_pix_to_mbus(&handle->format.fmt.pix, &fmt);
1418 isp_video_mbus_to_pix(video, &fmt, &handle->format.fmt.pix);
1419 handle->timeperframe.numerator = 1;
1420 handle->timeperframe.denominator = 1;
1421
1422 handle->video = video;
1423
1424 done:
1425 if (ret < 0) {
1426 v4l2_fh_del(&handle->vfh, file);
1427 v4l2_fh_exit(&handle->vfh);
1428 kfree(handle);
1429 }
1430
1431 return ret;
1432 }
1433
isp_video_release(struct file * file)1434 static int isp_video_release(struct file *file)
1435 {
1436 struct isp_video *video = video_drvdata(file);
1437 struct v4l2_fh *vfh = file_to_v4l2_fh(file);
1438 struct isp_video_fh *handle = file_to_isp_video_fh(file);
1439
1440 /* Disable streaming and free the buffers queue resources. */
1441 isp_video_streamoff(file, vfh, video->type);
1442
1443 mutex_lock(&video->queue_lock);
1444 vb2_queue_release(&handle->queue);
1445 mutex_unlock(&video->queue_lock);
1446
1447 v4l2_pipeline_pm_put(&video->video.entity);
1448
1449 /* Release the file handle. */
1450 v4l2_fh_del(vfh, file);
1451 v4l2_fh_exit(vfh);
1452 kfree(handle);
1453
1454 omap3isp_put(video->isp);
1455
1456 return 0;
1457 }
1458
isp_video_poll(struct file * file,poll_table * wait)1459 static __poll_t isp_video_poll(struct file *file, poll_table *wait)
1460 {
1461 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
1462 struct isp_video *video = video_drvdata(file);
1463 __poll_t ret;
1464
1465 mutex_lock(&video->queue_lock);
1466 ret = vb2_poll(&vfh->queue, file, wait);
1467 mutex_unlock(&video->queue_lock);
1468
1469 return ret;
1470 }
1471
isp_video_mmap(struct file * file,struct vm_area_struct * vma)1472 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1473 {
1474 struct isp_video_fh *vfh = file_to_isp_video_fh(file);
1475
1476 return vb2_mmap(&vfh->queue, vma);
1477 }
1478
1479 static const struct v4l2_file_operations isp_video_fops = {
1480 .owner = THIS_MODULE,
1481 .unlocked_ioctl = video_ioctl2,
1482 .open = isp_video_open,
1483 .release = isp_video_release,
1484 .poll = isp_video_poll,
1485 .mmap = isp_video_mmap,
1486 };
1487
1488 /* -----------------------------------------------------------------------------
1489 * ISP video core
1490 */
1491
1492 static const struct isp_video_operations isp_video_dummy_ops = {
1493 };
1494
omap3isp_video_init(struct isp_video * video,const char * name)1495 int omap3isp_video_init(struct isp_video *video, const char *name)
1496 {
1497 const char *direction;
1498 int ret;
1499
1500 switch (video->type) {
1501 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1502 direction = "output";
1503 video->pad.flags = MEDIA_PAD_FL_SINK
1504 | MEDIA_PAD_FL_MUST_CONNECT;
1505 break;
1506 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1507 direction = "input";
1508 video->pad.flags = MEDIA_PAD_FL_SOURCE
1509 | MEDIA_PAD_FL_MUST_CONNECT;
1510 video->video.vfl_dir = VFL_DIR_TX;
1511 break;
1512
1513 default:
1514 return -EINVAL;
1515 }
1516
1517 ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1518 if (ret < 0)
1519 return ret;
1520
1521 mutex_init(&video->mutex);
1522 atomic_set(&video->active, 0);
1523
1524 spin_lock_init(&video->pipe.lock);
1525 mutex_init(&video->stream_lock);
1526 mutex_init(&video->queue_lock);
1527 spin_lock_init(&video->irqlock);
1528
1529 /* Initialize the video device. */
1530 if (video->ops == NULL)
1531 video->ops = &isp_video_dummy_ops;
1532
1533 video->video.fops = &isp_video_fops;
1534 snprintf(video->video.name, sizeof(video->video.name),
1535 "OMAP3 ISP %s %s", name, direction);
1536 video->video.vfl_type = VFL_TYPE_VIDEO;
1537 video->video.release = video_device_release_empty;
1538 video->video.ioctl_ops = &isp_video_ioctl_ops;
1539 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1540 video->video.device_caps = V4L2_CAP_VIDEO_CAPTURE
1541 | V4L2_CAP_STREAMING | V4L2_CAP_IO_MC;
1542 v4l2_disable_ioctl(&video->video, VIDIOC_S_PARM);
1543 v4l2_disable_ioctl(&video->video, VIDIOC_G_PARM);
1544 } else {
1545 video->video.device_caps = V4L2_CAP_VIDEO_OUTPUT
1546 | V4L2_CAP_STREAMING | V4L2_CAP_IO_MC;
1547 }
1548
1549 video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1550
1551 video_set_drvdata(&video->video, video);
1552
1553 return 0;
1554 }
1555
omap3isp_video_cleanup(struct isp_video * video)1556 void omap3isp_video_cleanup(struct isp_video *video)
1557 {
1558 media_entity_cleanup(&video->video.entity);
1559 mutex_destroy(&video->queue_lock);
1560 mutex_destroy(&video->stream_lock);
1561 mutex_destroy(&video->mutex);
1562 }
1563
omap3isp_video_register(struct isp_video * video,struct v4l2_device * vdev)1564 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1565 {
1566 int ret;
1567
1568 video->video.v4l2_dev = vdev;
1569
1570 ret = video_register_device(&video->video, VFL_TYPE_VIDEO, -1);
1571 if (ret < 0)
1572 dev_err(video->isp->dev,
1573 "%s: could not register video device (%d)\n",
1574 __func__, ret);
1575
1576 return ret;
1577 }
1578
omap3isp_video_unregister(struct isp_video * video)1579 void omap3isp_video_unregister(struct isp_video *video)
1580 {
1581 video_unregister_device(&video->video);
1582 }
1583