1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * V4L2 Deinterlacer Subdev for Freescale i.MX5/6 SOC
4 *
5 * Copyright (c) 2017 Mentor Graphics Inc.
6 */
7 #include <media/v4l2-ctrls.h>
8 #include <media/v4l2-device.h>
9 #include <media/v4l2-ioctl.h>
10 #include <media/v4l2-mc.h>
11 #include <media/v4l2-subdev.h>
12 #include <media/imx.h>
13 #include "imx-media.h"
14
15 /*
16 * This subdev implements two different video pipelines:
17 *
18 * CSI -> VDIC
19 *
20 * In this pipeline, the CSI sends a single interlaced field F(n-1)
21 * directly to the VDIC (and optionally the following field F(n)
22 * can be sent to memory via IDMAC channel 13). This pipeline only works
23 * in VDIC's high motion mode, which only requires a single field for
24 * processing. The other motion modes (low and medium) require three
25 * fields, so this pipeline does not work in those modes. Also, it is
26 * not clear how this pipeline can deal with the various field orders
27 * (sequential BT/TB, interlaced BT/TB).
28 *
29 * MEM -> CH8,9,10 -> VDIC
30 *
31 * In this pipeline, previous field F(n-1), current field F(n), and next
32 * field F(n+1) are transferred to the VDIC via IDMAC channels 8,9,10.
33 * These memory buffers can come from a video output or mem2mem device.
34 * All motion modes are supported by this pipeline.
35 *
36 * The "direct" CSI->VDIC pipeline requires no DMA, but it can only be
37 * used in high motion mode.
38 */
39
40 struct vdic_priv;
41
42 struct vdic_pipeline_ops {
43 int (*setup)(struct vdic_priv *priv);
44 void (*start)(struct vdic_priv *priv);
45 void (*stop)(struct vdic_priv *priv);
46 void (*disable)(struct vdic_priv *priv);
47 };
48
49 /*
50 * Min/Max supported width and heights.
51 */
52 #define MIN_W 176
53 #define MIN_H 144
54 #define MAX_W_VDIC 968
55 #define MAX_H_VDIC 2048
56 #define W_ALIGN 4 /* multiple of 16 pixels */
57 #define H_ALIGN 1 /* multiple of 2 lines */
58 #define S_ALIGN 1 /* multiple of 2 */
59
60 struct vdic_priv {
61 struct device *ipu_dev;
62 struct ipu_soc *ipu;
63
64 struct v4l2_subdev sd;
65 struct media_pad pad[VDIC_NUM_PADS];
66
67 /* lock to protect all members below */
68 struct mutex lock;
69
70 /* IPU units we require */
71 struct ipu_vdi *vdi;
72
73 int active_input_pad;
74
75 struct ipuv3_channel *vdi_in_ch_p; /* F(n-1) transfer channel */
76 struct ipuv3_channel *vdi_in_ch; /* F(n) transfer channel */
77 struct ipuv3_channel *vdi_in_ch_n; /* F(n+1) transfer channel */
78
79 /* pipeline operations */
80 struct vdic_pipeline_ops *ops;
81
82 /* current and previous input buffers indirect path */
83 struct imx_media_buffer *curr_in_buf;
84 struct imx_media_buffer *prev_in_buf;
85
86 /*
87 * translated field type, input line stride, and field size
88 * for indirect path
89 */
90 u32 fieldtype;
91 u32 in_stride;
92 u32 field_size;
93
94 /* the source (a video device or subdev) */
95 struct media_entity *src;
96 /* the sink that will receive the progressive out buffers */
97 struct v4l2_subdev *sink_sd;
98
99 struct v4l2_mbus_framefmt format_mbus[VDIC_NUM_PADS];
100 const struct imx_media_pixfmt *cc[VDIC_NUM_PADS];
101 struct v4l2_fract frame_interval[VDIC_NUM_PADS];
102
103 /* the video device at IDMAC input pad */
104 struct imx_media_video_dev *vdev;
105
106 bool csi_direct; /* using direct CSI->VDIC->IC pipeline */
107
108 /* motion select control */
109 struct v4l2_ctrl_handler ctrl_hdlr;
110 enum ipu_motion_sel motion;
111
112 int stream_count;
113 };
114
vdic_put_ipu_resources(struct vdic_priv * priv)115 static void vdic_put_ipu_resources(struct vdic_priv *priv)
116 {
117 if (priv->vdi_in_ch_p)
118 ipu_idmac_put(priv->vdi_in_ch_p);
119 priv->vdi_in_ch_p = NULL;
120
121 if (priv->vdi_in_ch)
122 ipu_idmac_put(priv->vdi_in_ch);
123 priv->vdi_in_ch = NULL;
124
125 if (priv->vdi_in_ch_n)
126 ipu_idmac_put(priv->vdi_in_ch_n);
127 priv->vdi_in_ch_n = NULL;
128
129 if (!IS_ERR_OR_NULL(priv->vdi))
130 ipu_vdi_put(priv->vdi);
131 priv->vdi = NULL;
132 }
133
vdic_get_ipu_resources(struct vdic_priv * priv)134 static int vdic_get_ipu_resources(struct vdic_priv *priv)
135 {
136 int ret, err_chan;
137 struct ipuv3_channel *ch;
138 struct ipu_vdi *vdi;
139
140 vdi = ipu_vdi_get(priv->ipu);
141 if (IS_ERR(vdi)) {
142 v4l2_err(&priv->sd, "failed to get VDIC\n");
143 ret = PTR_ERR(vdi);
144 goto out;
145 }
146 priv->vdi = vdi;
147
148 if (!priv->csi_direct) {
149 ch = ipu_idmac_get(priv->ipu, IPUV3_CHANNEL_MEM_VDI_PREV);
150 if (IS_ERR(ch)) {
151 err_chan = IPUV3_CHANNEL_MEM_VDI_PREV;
152 ret = PTR_ERR(ch);
153 goto out_err_chan;
154 }
155 priv->vdi_in_ch_p = ch;
156
157 ch = ipu_idmac_get(priv->ipu, IPUV3_CHANNEL_MEM_VDI_CUR);
158 if (IS_ERR(ch)) {
159 err_chan = IPUV3_CHANNEL_MEM_VDI_CUR;
160 ret = PTR_ERR(ch);
161 goto out_err_chan;
162 }
163 priv->vdi_in_ch = ch;
164
165 ch = ipu_idmac_get(priv->ipu, IPUV3_CHANNEL_MEM_VDI_NEXT);
166 if (IS_ERR(ch)) {
167 err_chan = IPUV3_CHANNEL_MEM_VDI_NEXT;
168 ret = PTR_ERR(ch);
169 goto out_err_chan;
170 }
171 priv->vdi_in_ch_n = ch;
172 }
173
174 return 0;
175
176 out_err_chan:
177 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n", err_chan);
178 out:
179 vdic_put_ipu_resources(priv);
180 return ret;
181 }
182
183 /*
184 * This function is currently unused, but will be called when the
185 * output/mem2mem device at the IDMAC input pad sends us a new
186 * buffer. It kicks off the IDMAC read channels to bring in the
187 * buffer fields from memory and begin the conversions.
188 */
prepare_vdi_in_buffers(struct vdic_priv * priv,struct imx_media_buffer * curr)189 static void __maybe_unused prepare_vdi_in_buffers(struct vdic_priv *priv,
190 struct imx_media_buffer *curr)
191 {
192 dma_addr_t prev_phys, curr_phys, next_phys;
193 struct imx_media_buffer *prev;
194 struct vb2_buffer *curr_vb, *prev_vb;
195 u32 fs = priv->field_size;
196 u32 is = priv->in_stride;
197
198 /* current input buffer is now previous */
199 priv->prev_in_buf = priv->curr_in_buf;
200 priv->curr_in_buf = curr;
201 prev = priv->prev_in_buf ? priv->prev_in_buf : curr;
202
203 prev_vb = &prev->vbuf.vb2_buf;
204 curr_vb = &curr->vbuf.vb2_buf;
205
206 switch (priv->fieldtype) {
207 case V4L2_FIELD_SEQ_TB:
208 case V4L2_FIELD_SEQ_BT:
209 prev_phys = vb2_dma_contig_plane_dma_addr(prev_vb, 0) + fs;
210 curr_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0);
211 next_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0) + fs;
212 break;
213 case V4L2_FIELD_INTERLACED_TB:
214 case V4L2_FIELD_INTERLACED_BT:
215 case V4L2_FIELD_INTERLACED:
216 prev_phys = vb2_dma_contig_plane_dma_addr(prev_vb, 0) + is;
217 curr_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0);
218 next_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0) + is;
219 break;
220 default:
221 /*
222 * can't get here, priv->fieldtype can only be one of
223 * the above. This is to quiet smatch errors.
224 */
225 return;
226 }
227
228 ipu_cpmem_set_buffer(priv->vdi_in_ch_p, 0, prev_phys);
229 ipu_cpmem_set_buffer(priv->vdi_in_ch, 0, curr_phys);
230 ipu_cpmem_set_buffer(priv->vdi_in_ch_n, 0, next_phys);
231
232 ipu_idmac_select_buffer(priv->vdi_in_ch_p, 0);
233 ipu_idmac_select_buffer(priv->vdi_in_ch, 0);
234 ipu_idmac_select_buffer(priv->vdi_in_ch_n, 0);
235 }
236
setup_vdi_channel(struct vdic_priv * priv,struct ipuv3_channel * channel,dma_addr_t phys0,dma_addr_t phys1)237 static int setup_vdi_channel(struct vdic_priv *priv,
238 struct ipuv3_channel *channel,
239 dma_addr_t phys0, dma_addr_t phys1)
240 {
241 struct imx_media_video_dev *vdev = priv->vdev;
242 unsigned int burst_size;
243 struct ipu_image image;
244 int ret;
245
246 ipu_cpmem_zero(channel);
247
248 memset(&image, 0, sizeof(image));
249 image.pix = vdev->fmt.fmt.pix;
250 image.rect = vdev->compose;
251 /* one field to VDIC channels */
252 image.pix.height /= 2;
253 image.rect.height /= 2;
254 image.phys0 = phys0;
255 image.phys1 = phys1;
256
257 ret = ipu_cpmem_set_image(channel, &image);
258 if (ret)
259 return ret;
260
261 burst_size = (image.pix.width & 0xf) ? 8 : 16;
262 ipu_cpmem_set_burstsize(channel, burst_size);
263
264 ipu_cpmem_set_axi_id(channel, 1);
265
266 ipu_idmac_set_double_buffer(channel, false);
267
268 return 0;
269 }
270
vdic_setup_direct(struct vdic_priv * priv)271 static int vdic_setup_direct(struct vdic_priv *priv)
272 {
273 /* set VDIC to receive from CSI for direct path */
274 ipu_fsu_link(priv->ipu, IPUV3_CHANNEL_CSI_DIRECT,
275 IPUV3_CHANNEL_CSI_VDI_PREV);
276
277 return 0;
278 }
279
vdic_start_direct(struct vdic_priv * priv)280 static void vdic_start_direct(struct vdic_priv *priv)
281 {
282 }
283
vdic_stop_direct(struct vdic_priv * priv)284 static void vdic_stop_direct(struct vdic_priv *priv)
285 {
286 }
287
vdic_disable_direct(struct vdic_priv * priv)288 static void vdic_disable_direct(struct vdic_priv *priv)
289 {
290 ipu_fsu_unlink(priv->ipu, IPUV3_CHANNEL_CSI_DIRECT,
291 IPUV3_CHANNEL_CSI_VDI_PREV);
292 }
293
vdic_setup_indirect(struct vdic_priv * priv)294 static int vdic_setup_indirect(struct vdic_priv *priv)
295 {
296 struct v4l2_mbus_framefmt *infmt;
297 const struct imx_media_pixfmt *incc;
298 int in_size, ret;
299
300 infmt = &priv->format_mbus[VDIC_SINK_PAD_IDMAC];
301 incc = priv->cc[VDIC_SINK_PAD_IDMAC];
302
303 in_size = (infmt->width * incc->bpp * infmt->height) >> 3;
304
305 /* 1/2 full image size */
306 priv->field_size = in_size / 2;
307 priv->in_stride = incc->planar ?
308 infmt->width : (infmt->width * incc->bpp) >> 3;
309
310 priv->prev_in_buf = NULL;
311 priv->curr_in_buf = NULL;
312
313 priv->fieldtype = infmt->field;
314
315 /* init the vdi-in channels */
316 ret = setup_vdi_channel(priv, priv->vdi_in_ch_p, 0, 0);
317 if (ret)
318 return ret;
319 ret = setup_vdi_channel(priv, priv->vdi_in_ch, 0, 0);
320 if (ret)
321 return ret;
322 return setup_vdi_channel(priv, priv->vdi_in_ch_n, 0, 0);
323 }
324
vdic_start_indirect(struct vdic_priv * priv)325 static void vdic_start_indirect(struct vdic_priv *priv)
326 {
327 /* enable the channels */
328 ipu_idmac_enable_channel(priv->vdi_in_ch_p);
329 ipu_idmac_enable_channel(priv->vdi_in_ch);
330 ipu_idmac_enable_channel(priv->vdi_in_ch_n);
331 }
332
vdic_stop_indirect(struct vdic_priv * priv)333 static void vdic_stop_indirect(struct vdic_priv *priv)
334 {
335 /* disable channels */
336 ipu_idmac_disable_channel(priv->vdi_in_ch_p);
337 ipu_idmac_disable_channel(priv->vdi_in_ch);
338 ipu_idmac_disable_channel(priv->vdi_in_ch_n);
339 }
340
vdic_disable_indirect(struct vdic_priv * priv)341 static void vdic_disable_indirect(struct vdic_priv *priv)
342 {
343 }
344
345 static struct vdic_pipeline_ops direct_ops = {
346 .setup = vdic_setup_direct,
347 .start = vdic_start_direct,
348 .stop = vdic_stop_direct,
349 .disable = vdic_disable_direct,
350 };
351
352 static struct vdic_pipeline_ops indirect_ops = {
353 .setup = vdic_setup_indirect,
354 .start = vdic_start_indirect,
355 .stop = vdic_stop_indirect,
356 .disable = vdic_disable_indirect,
357 };
358
vdic_start(struct vdic_priv * priv)359 static int vdic_start(struct vdic_priv *priv)
360 {
361 struct v4l2_mbus_framefmt *infmt;
362 int ret;
363
364 infmt = &priv->format_mbus[priv->active_input_pad];
365
366 priv->ops = priv->csi_direct ? &direct_ops : &indirect_ops;
367
368 ret = vdic_get_ipu_resources(priv);
369 if (ret)
370 return ret;
371
372 /*
373 * init the VDIC.
374 *
375 * note we don't give infmt->code to ipu_vdi_setup(). The VDIC
376 * only supports 4:2:2 or 4:2:0, and this subdev will only
377 * negotiate 4:2:2 at its sink pads.
378 */
379 ipu_vdi_setup(priv->vdi, MEDIA_BUS_FMT_UYVY8_2X8,
380 infmt->width, infmt->height);
381 ipu_vdi_set_field_order(priv->vdi, V4L2_STD_UNKNOWN, infmt->field);
382 ipu_vdi_set_motion(priv->vdi, priv->motion);
383
384 ret = priv->ops->setup(priv);
385 if (ret)
386 goto out_put_ipu;
387
388 ipu_vdi_enable(priv->vdi);
389
390 priv->ops->start(priv);
391
392 return 0;
393
394 out_put_ipu:
395 vdic_put_ipu_resources(priv);
396 return ret;
397 }
398
vdic_stop(struct vdic_priv * priv)399 static void vdic_stop(struct vdic_priv *priv)
400 {
401 priv->ops->stop(priv);
402 ipu_vdi_disable(priv->vdi);
403 priv->ops->disable(priv);
404
405 vdic_put_ipu_resources(priv);
406 }
407
408 /*
409 * V4L2 subdev operations.
410 */
411
vdic_s_ctrl(struct v4l2_ctrl * ctrl)412 static int vdic_s_ctrl(struct v4l2_ctrl *ctrl)
413 {
414 struct vdic_priv *priv = container_of(ctrl->handler,
415 struct vdic_priv, ctrl_hdlr);
416 enum ipu_motion_sel motion;
417 int ret = 0;
418
419 mutex_lock(&priv->lock);
420
421 switch (ctrl->id) {
422 case V4L2_CID_DEINTERLACING_MODE:
423 motion = ctrl->val;
424 if (motion != priv->motion) {
425 /* can't change motion control mid-streaming */
426 if (priv->stream_count > 0) {
427 ret = -EBUSY;
428 goto out;
429 }
430 priv->motion = motion;
431 }
432 break;
433 default:
434 v4l2_err(&priv->sd, "Invalid control\n");
435 ret = -EINVAL;
436 }
437
438 out:
439 mutex_unlock(&priv->lock);
440 return ret;
441 }
442
443 static const struct v4l2_ctrl_ops vdic_ctrl_ops = {
444 .s_ctrl = vdic_s_ctrl,
445 };
446
447 static const char * const vdic_ctrl_motion_menu[] = {
448 "No Motion Compensation",
449 "Low Motion",
450 "Medium Motion",
451 "High Motion",
452 };
453
vdic_init_controls(struct vdic_priv * priv)454 static int vdic_init_controls(struct vdic_priv *priv)
455 {
456 struct v4l2_ctrl_handler *hdlr = &priv->ctrl_hdlr;
457 int ret;
458
459 v4l2_ctrl_handler_init(hdlr, 1);
460
461 v4l2_ctrl_new_std_menu_items(hdlr, &vdic_ctrl_ops,
462 V4L2_CID_DEINTERLACING_MODE,
463 HIGH_MOTION, 0, HIGH_MOTION,
464 vdic_ctrl_motion_menu);
465
466 priv->sd.ctrl_handler = hdlr;
467
468 if (hdlr->error) {
469 ret = hdlr->error;
470 goto out_free;
471 }
472
473 v4l2_ctrl_handler_setup(hdlr);
474 return 0;
475
476 out_free:
477 v4l2_ctrl_handler_free(hdlr);
478 return ret;
479 }
480
vdic_s_stream(struct v4l2_subdev * sd,int enable)481 static int vdic_s_stream(struct v4l2_subdev *sd, int enable)
482 {
483 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
484 struct v4l2_subdev *src_sd = NULL;
485 int ret = 0;
486
487 mutex_lock(&priv->lock);
488
489 if (!priv->src || !priv->sink_sd) {
490 ret = -EPIPE;
491 goto out;
492 }
493
494 if (priv->csi_direct)
495 src_sd = media_entity_to_v4l2_subdev(priv->src);
496
497 /*
498 * enable/disable streaming only if stream_count is
499 * going from 0 to 1 / 1 to 0.
500 */
501 if (priv->stream_count != !enable)
502 goto update_count;
503
504 dev_dbg(priv->ipu_dev, "%s: stream %s\n", sd->name,
505 enable ? "ON" : "OFF");
506
507 if (enable)
508 ret = vdic_start(priv);
509 else
510 vdic_stop(priv);
511 if (ret)
512 goto out;
513
514 if (src_sd) {
515 /* start/stop upstream */
516 ret = v4l2_subdev_call(src_sd, video, s_stream, enable);
517 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
518 if (ret) {
519 if (enable)
520 vdic_stop(priv);
521 goto out;
522 }
523 }
524
525 update_count:
526 priv->stream_count += enable ? 1 : -1;
527 if (priv->stream_count < 0)
528 priv->stream_count = 0;
529 out:
530 mutex_unlock(&priv->lock);
531 return ret;
532 }
533
534 static struct v4l2_mbus_framefmt *
__vdic_get_fmt(struct vdic_priv * priv,struct v4l2_subdev_pad_config * cfg,unsigned int pad,enum v4l2_subdev_format_whence which)535 __vdic_get_fmt(struct vdic_priv *priv, struct v4l2_subdev_pad_config *cfg,
536 unsigned int pad, enum v4l2_subdev_format_whence which)
537 {
538 if (which == V4L2_SUBDEV_FORMAT_TRY)
539 return v4l2_subdev_get_try_format(&priv->sd, cfg, pad);
540 else
541 return &priv->format_mbus[pad];
542 }
543
vdic_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)544 static int vdic_enum_mbus_code(struct v4l2_subdev *sd,
545 struct v4l2_subdev_pad_config *cfg,
546 struct v4l2_subdev_mbus_code_enum *code)
547 {
548 if (code->pad >= VDIC_NUM_PADS)
549 return -EINVAL;
550
551 return imx_media_enum_ipu_format(&code->code, code->index, CS_SEL_YUV);
552 }
553
vdic_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat)554 static int vdic_get_fmt(struct v4l2_subdev *sd,
555 struct v4l2_subdev_pad_config *cfg,
556 struct v4l2_subdev_format *sdformat)
557 {
558 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
559 struct v4l2_mbus_framefmt *fmt;
560 int ret = 0;
561
562 if (sdformat->pad >= VDIC_NUM_PADS)
563 return -EINVAL;
564
565 mutex_lock(&priv->lock);
566
567 fmt = __vdic_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
568 if (!fmt) {
569 ret = -EINVAL;
570 goto out;
571 }
572
573 sdformat->format = *fmt;
574 out:
575 mutex_unlock(&priv->lock);
576 return ret;
577 }
578
vdic_try_fmt(struct vdic_priv * priv,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat,const struct imx_media_pixfmt ** cc)579 static void vdic_try_fmt(struct vdic_priv *priv,
580 struct v4l2_subdev_pad_config *cfg,
581 struct v4l2_subdev_format *sdformat,
582 const struct imx_media_pixfmt **cc)
583 {
584 struct v4l2_mbus_framefmt *infmt;
585
586 *cc = imx_media_find_ipu_format(sdformat->format.code, CS_SEL_YUV);
587 if (!*cc) {
588 u32 code;
589
590 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV);
591 *cc = imx_media_find_ipu_format(code, CS_SEL_YUV);
592 sdformat->format.code = (*cc)->codes[0];
593 }
594
595 infmt = __vdic_get_fmt(priv, cfg, priv->active_input_pad,
596 sdformat->which);
597
598 switch (sdformat->pad) {
599 case VDIC_SRC_PAD_DIRECT:
600 sdformat->format = *infmt;
601 /* output is always progressive! */
602 sdformat->format.field = V4L2_FIELD_NONE;
603 break;
604 case VDIC_SINK_PAD_DIRECT:
605 case VDIC_SINK_PAD_IDMAC:
606 v4l_bound_align_image(&sdformat->format.width,
607 MIN_W, MAX_W_VDIC, W_ALIGN,
608 &sdformat->format.height,
609 MIN_H, MAX_H_VDIC, H_ALIGN, S_ALIGN);
610
611 /* input must be interlaced! Choose SEQ_TB if not */
612 if (!V4L2_FIELD_HAS_BOTH(sdformat->format.field))
613 sdformat->format.field = V4L2_FIELD_SEQ_TB;
614 break;
615 }
616
617 imx_media_try_colorimetry(&sdformat->format, true);
618 }
619
vdic_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat)620 static int vdic_set_fmt(struct v4l2_subdev *sd,
621 struct v4l2_subdev_pad_config *cfg,
622 struct v4l2_subdev_format *sdformat)
623 {
624 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
625 const struct imx_media_pixfmt *cc;
626 struct v4l2_mbus_framefmt *fmt;
627 int ret = 0;
628
629 if (sdformat->pad >= VDIC_NUM_PADS)
630 return -EINVAL;
631
632 mutex_lock(&priv->lock);
633
634 if (priv->stream_count > 0) {
635 ret = -EBUSY;
636 goto out;
637 }
638
639 vdic_try_fmt(priv, cfg, sdformat, &cc);
640
641 fmt = __vdic_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
642 *fmt = sdformat->format;
643
644 /* propagate format to source pad */
645 if (sdformat->pad == VDIC_SINK_PAD_DIRECT ||
646 sdformat->pad == VDIC_SINK_PAD_IDMAC) {
647 const struct imx_media_pixfmt *outcc;
648 struct v4l2_mbus_framefmt *outfmt;
649 struct v4l2_subdev_format format;
650
651 format.pad = VDIC_SRC_PAD_DIRECT;
652 format.which = sdformat->which;
653 format.format = sdformat->format;
654 vdic_try_fmt(priv, cfg, &format, &outcc);
655
656 outfmt = __vdic_get_fmt(priv, cfg, VDIC_SRC_PAD_DIRECT,
657 sdformat->which);
658 *outfmt = format.format;
659 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
660 priv->cc[VDIC_SRC_PAD_DIRECT] = outcc;
661 }
662
663 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
664 priv->cc[sdformat->pad] = cc;
665 out:
666 mutex_unlock(&priv->lock);
667 return ret;
668 }
669
vdic_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)670 static int vdic_link_setup(struct media_entity *entity,
671 const struct media_pad *local,
672 const struct media_pad *remote, u32 flags)
673 {
674 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
675 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
676 struct v4l2_subdev *remote_sd;
677 int ret = 0;
678
679 dev_dbg(priv->ipu_dev, "%s: link setup %s -> %s",
680 sd->name, remote->entity->name, local->entity->name);
681
682 mutex_lock(&priv->lock);
683
684 if (local->flags & MEDIA_PAD_FL_SOURCE) {
685 if (!is_media_entity_v4l2_subdev(remote->entity)) {
686 ret = -EINVAL;
687 goto out;
688 }
689
690 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
691
692 if (flags & MEDIA_LNK_FL_ENABLED) {
693 if (priv->sink_sd) {
694 ret = -EBUSY;
695 goto out;
696 }
697 priv->sink_sd = remote_sd;
698 } else {
699 priv->sink_sd = NULL;
700 }
701
702 goto out;
703 }
704
705 /* this is a sink pad */
706
707 if (flags & MEDIA_LNK_FL_ENABLED) {
708 if (priv->src) {
709 ret = -EBUSY;
710 goto out;
711 }
712 } else {
713 priv->src = NULL;
714 goto out;
715 }
716
717 if (local->index == VDIC_SINK_PAD_IDMAC) {
718 struct imx_media_video_dev *vdev = priv->vdev;
719
720 if (!is_media_entity_v4l2_video_device(remote->entity)) {
721 ret = -EINVAL;
722 goto out;
723 }
724 if (!vdev) {
725 ret = -ENODEV;
726 goto out;
727 }
728
729 priv->csi_direct = false;
730 } else {
731 if (!is_media_entity_v4l2_subdev(remote->entity)) {
732 ret = -EINVAL;
733 goto out;
734 }
735
736 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
737
738 /* direct pad must connect to a CSI */
739 if (!(remote_sd->grp_id & IMX_MEDIA_GRP_ID_IPU_CSI) ||
740 remote->index != CSI_SRC_PAD_DIRECT) {
741 ret = -EINVAL;
742 goto out;
743 }
744
745 priv->csi_direct = true;
746 }
747
748 priv->src = remote->entity;
749 /* record which input pad is now active */
750 priv->active_input_pad = local->index;
751 out:
752 mutex_unlock(&priv->lock);
753 return ret;
754 }
755
vdic_link_validate(struct v4l2_subdev * sd,struct media_link * link,struct v4l2_subdev_format * source_fmt,struct v4l2_subdev_format * sink_fmt)756 static int vdic_link_validate(struct v4l2_subdev *sd,
757 struct media_link *link,
758 struct v4l2_subdev_format *source_fmt,
759 struct v4l2_subdev_format *sink_fmt)
760 {
761 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
762 int ret;
763
764 ret = v4l2_subdev_link_validate_default(sd, link,
765 source_fmt, sink_fmt);
766 if (ret)
767 return ret;
768
769 mutex_lock(&priv->lock);
770
771 if (priv->csi_direct && priv->motion != HIGH_MOTION) {
772 v4l2_err(&priv->sd,
773 "direct CSI pipeline requires high motion\n");
774 ret = -EINVAL;
775 }
776
777 mutex_unlock(&priv->lock);
778 return ret;
779 }
780
vdic_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)781 static int vdic_g_frame_interval(struct v4l2_subdev *sd,
782 struct v4l2_subdev_frame_interval *fi)
783 {
784 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
785
786 if (fi->pad >= VDIC_NUM_PADS)
787 return -EINVAL;
788
789 mutex_lock(&priv->lock);
790
791 fi->interval = priv->frame_interval[fi->pad];
792
793 mutex_unlock(&priv->lock);
794
795 return 0;
796 }
797
vdic_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)798 static int vdic_s_frame_interval(struct v4l2_subdev *sd,
799 struct v4l2_subdev_frame_interval *fi)
800 {
801 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
802 struct v4l2_fract *input_fi, *output_fi;
803 int ret = 0;
804
805 mutex_lock(&priv->lock);
806
807 input_fi = &priv->frame_interval[priv->active_input_pad];
808 output_fi = &priv->frame_interval[VDIC_SRC_PAD_DIRECT];
809
810 switch (fi->pad) {
811 case VDIC_SINK_PAD_DIRECT:
812 case VDIC_SINK_PAD_IDMAC:
813 /* No limits on valid input frame intervals */
814 if (fi->interval.numerator == 0 ||
815 fi->interval.denominator == 0)
816 fi->interval = priv->frame_interval[fi->pad];
817 /* Reset output interval */
818 *output_fi = fi->interval;
819 if (priv->csi_direct)
820 output_fi->denominator *= 2;
821 break;
822 case VDIC_SRC_PAD_DIRECT:
823 /*
824 * frame rate at output pad is double input
825 * rate when using direct CSI->VDIC pipeline.
826 *
827 * TODO: implement VDIC frame skipping
828 */
829 fi->interval = *input_fi;
830 if (priv->csi_direct)
831 fi->interval.denominator *= 2;
832 break;
833 default:
834 ret = -EINVAL;
835 goto out;
836 }
837
838 priv->frame_interval[fi->pad] = fi->interval;
839 out:
840 mutex_unlock(&priv->lock);
841 return ret;
842 }
843
844 /*
845 * retrieve our pads parsed from the OF graph by the media device
846 */
vdic_registered(struct v4l2_subdev * sd)847 static int vdic_registered(struct v4l2_subdev *sd)
848 {
849 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
850 int i, ret;
851 u32 code;
852
853 for (i = 0; i < VDIC_NUM_PADS; i++) {
854 priv->pad[i].flags = (i == VDIC_SRC_PAD_DIRECT) ?
855 MEDIA_PAD_FL_SOURCE : MEDIA_PAD_FL_SINK;
856
857 code = 0;
858 if (i != VDIC_SINK_PAD_IDMAC)
859 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV);
860
861 /* set a default mbus format */
862 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i],
863 640, 480, code, V4L2_FIELD_NONE,
864 &priv->cc[i]);
865 if (ret)
866 return ret;
867
868 /* init default frame interval */
869 priv->frame_interval[i].numerator = 1;
870 priv->frame_interval[i].denominator = 30;
871 if (i == VDIC_SRC_PAD_DIRECT)
872 priv->frame_interval[i].denominator *= 2;
873 }
874
875 priv->active_input_pad = VDIC_SINK_PAD_DIRECT;
876
877 ret = vdic_init_controls(priv);
878 if (ret)
879 return ret;
880
881 ret = media_entity_pads_init(&sd->entity, VDIC_NUM_PADS, priv->pad);
882 if (ret)
883 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
884
885 return ret;
886 }
887
vdic_unregistered(struct v4l2_subdev * sd)888 static void vdic_unregistered(struct v4l2_subdev *sd)
889 {
890 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
891
892 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
893 }
894
895 static const struct v4l2_subdev_pad_ops vdic_pad_ops = {
896 .init_cfg = imx_media_init_cfg,
897 .enum_mbus_code = vdic_enum_mbus_code,
898 .get_fmt = vdic_get_fmt,
899 .set_fmt = vdic_set_fmt,
900 .link_validate = vdic_link_validate,
901 };
902
903 static const struct v4l2_subdev_video_ops vdic_video_ops = {
904 .g_frame_interval = vdic_g_frame_interval,
905 .s_frame_interval = vdic_s_frame_interval,
906 .s_stream = vdic_s_stream,
907 };
908
909 static const struct media_entity_operations vdic_entity_ops = {
910 .link_setup = vdic_link_setup,
911 .link_validate = v4l2_subdev_link_validate,
912 };
913
914 static const struct v4l2_subdev_ops vdic_subdev_ops = {
915 .video = &vdic_video_ops,
916 .pad = &vdic_pad_ops,
917 };
918
919 static const struct v4l2_subdev_internal_ops vdic_internal_ops = {
920 .registered = vdic_registered,
921 .unregistered = vdic_unregistered,
922 };
923
imx_media_vdic_register(struct v4l2_device * v4l2_dev,struct device * ipu_dev,struct ipu_soc * ipu,u32 grp_id)924 struct v4l2_subdev *imx_media_vdic_register(struct v4l2_device *v4l2_dev,
925 struct device *ipu_dev,
926 struct ipu_soc *ipu,
927 u32 grp_id)
928 {
929 struct vdic_priv *priv;
930 int ret;
931
932 priv = devm_kzalloc(ipu_dev, sizeof(*priv), GFP_KERNEL);
933 if (!priv)
934 return ERR_PTR(-ENOMEM);
935
936 priv->ipu_dev = ipu_dev;
937 priv->ipu = ipu;
938
939 v4l2_subdev_init(&priv->sd, &vdic_subdev_ops);
940 v4l2_set_subdevdata(&priv->sd, priv);
941 priv->sd.internal_ops = &vdic_internal_ops;
942 priv->sd.entity.ops = &vdic_entity_ops;
943 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
944 priv->sd.owner = ipu_dev->driver->owner;
945 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
946 priv->sd.grp_id = grp_id;
947 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name),
948 priv->sd.grp_id, ipu_get_num(ipu));
949
950 mutex_init(&priv->lock);
951
952 ret = v4l2_device_register_subdev(v4l2_dev, &priv->sd);
953 if (ret)
954 goto free;
955
956 return &priv->sd;
957 free:
958 mutex_destroy(&priv->lock);
959 return ERR_PTR(ret);
960 }
961
imx_media_vdic_unregister(struct v4l2_subdev * sd)962 int imx_media_vdic_unregister(struct v4l2_subdev *sd)
963 {
964 struct vdic_priv *priv = v4l2_get_subdevdata(sd);
965
966 v4l2_info(sd, "Removing\n");
967
968 v4l2_device_unregister_subdev(sd);
969 mutex_destroy(&priv->lock);
970 media_entity_cleanup(&sd->entity);
971
972 return 0;
973 }
974
