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