1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * vsp1_wpf.c -- R-Car VSP1 Write Pixel Formatter
4 *
5 * Copyright (C) 2013-2014 Renesas Electronics Corporation
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10 #include <linux/device.h>
11
12 #include <media/v4l2-subdev.h>
13
14 #include "vsp1.h"
15 #include "vsp1_dl.h"
16 #include "vsp1_pipe.h"
17 #include "vsp1_rwpf.h"
18 #include "vsp1_video.h"
19
20 #define WPF_GEN2_MAX_WIDTH 2048U
21 #define WPF_GEN2_MAX_HEIGHT 2048U
22 #define WPF_GEN3_MAX_WIDTH 8190U
23 #define WPF_GEN3_MAX_HEIGHT 8190U
24
25 /* -----------------------------------------------------------------------------
26 * Device Access
27 */
28
vsp1_wpf_write(struct vsp1_rwpf * wpf,struct vsp1_dl_body * dlb,u32 reg,u32 data)29 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf,
30 struct vsp1_dl_body *dlb, u32 reg, u32 data)
31 {
32 vsp1_dl_body_write(dlb, reg + wpf->entity.index * VI6_WPF_OFFSET, data);
33 }
34
35 /* -----------------------------------------------------------------------------
36 * Controls
37 */
38
39 enum wpf_flip_ctrl {
40 WPF_CTRL_VFLIP = 0,
41 WPF_CTRL_HFLIP = 1,
42 };
43
vsp1_wpf_set_rotation(struct vsp1_rwpf * wpf,unsigned int rotation)44 static int vsp1_wpf_set_rotation(struct vsp1_rwpf *wpf, unsigned int rotation)
45 {
46 struct vsp1_video *video = wpf->video;
47 struct v4l2_mbus_framefmt *sink_format;
48 struct v4l2_mbus_framefmt *source_format;
49 bool rotate;
50 int ret = 0;
51
52 /*
53 * Only consider the 0°/180° from/to 90°/270° modifications, the rest
54 * is taken care of by the flipping configuration.
55 */
56 rotate = rotation == 90 || rotation == 270;
57 if (rotate == wpf->flip.rotate)
58 return 0;
59
60 /* Changing rotation isn't allowed when buffers are allocated. */
61 mutex_lock(&video->lock);
62
63 if (vb2_is_busy(&video->queue)) {
64 ret = -EBUSY;
65 goto done;
66 }
67
68 sink_format = vsp1_entity_get_pad_format(&wpf->entity,
69 wpf->entity.config,
70 RWPF_PAD_SINK);
71 source_format = vsp1_entity_get_pad_format(&wpf->entity,
72 wpf->entity.config,
73 RWPF_PAD_SOURCE);
74
75 mutex_lock(&wpf->entity.lock);
76
77 if (rotate) {
78 source_format->width = sink_format->height;
79 source_format->height = sink_format->width;
80 } else {
81 source_format->width = sink_format->width;
82 source_format->height = sink_format->height;
83 }
84
85 wpf->flip.rotate = rotate;
86
87 mutex_unlock(&wpf->entity.lock);
88
89 done:
90 mutex_unlock(&video->lock);
91 return ret;
92 }
93
vsp1_wpf_s_ctrl(struct v4l2_ctrl * ctrl)94 static int vsp1_wpf_s_ctrl(struct v4l2_ctrl *ctrl)
95 {
96 struct vsp1_rwpf *wpf =
97 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
98 unsigned int rotation;
99 u32 flip = 0;
100 int ret;
101
102 /* Update the rotation. */
103 rotation = wpf->flip.ctrls.rotate ? wpf->flip.ctrls.rotate->val : 0;
104 ret = vsp1_wpf_set_rotation(wpf, rotation);
105 if (ret < 0)
106 return ret;
107
108 /*
109 * Compute the flip value resulting from all three controls, with
110 * rotation by 180° flipping the image in both directions. Store the
111 * result in the pending flip field for the next frame that will be
112 * processed.
113 */
114 if (wpf->flip.ctrls.vflip->val)
115 flip |= BIT(WPF_CTRL_VFLIP);
116
117 if (wpf->flip.ctrls.hflip && wpf->flip.ctrls.hflip->val)
118 flip |= BIT(WPF_CTRL_HFLIP);
119
120 if (rotation == 180 || rotation == 270)
121 flip ^= BIT(WPF_CTRL_VFLIP) | BIT(WPF_CTRL_HFLIP);
122
123 spin_lock_irq(&wpf->flip.lock);
124 wpf->flip.pending = flip;
125 spin_unlock_irq(&wpf->flip.lock);
126
127 return 0;
128 }
129
130 static const struct v4l2_ctrl_ops vsp1_wpf_ctrl_ops = {
131 .s_ctrl = vsp1_wpf_s_ctrl,
132 };
133
wpf_init_controls(struct vsp1_rwpf * wpf)134 static int wpf_init_controls(struct vsp1_rwpf *wpf)
135 {
136 struct vsp1_device *vsp1 = wpf->entity.vsp1;
137 unsigned int num_flip_ctrls;
138
139 spin_lock_init(&wpf->flip.lock);
140
141 if (wpf->entity.index != 0) {
142 /* Only WPF0 supports flipping. */
143 num_flip_ctrls = 0;
144 } else if (vsp1_feature(vsp1, VSP1_HAS_WPF_HFLIP)) {
145 /*
146 * When horizontal flip is supported the WPF implements three
147 * controls (horizontal flip, vertical flip and rotation).
148 */
149 num_flip_ctrls = 3;
150 } else if (vsp1_feature(vsp1, VSP1_HAS_WPF_VFLIP)) {
151 /*
152 * When only vertical flip is supported the WPF implements a
153 * single control (vertical flip).
154 */
155 num_flip_ctrls = 1;
156 } else {
157 /* Otherwise flipping is not supported. */
158 num_flip_ctrls = 0;
159 }
160
161 vsp1_rwpf_init_ctrls(wpf, num_flip_ctrls);
162
163 if (num_flip_ctrls >= 1) {
164 wpf->flip.ctrls.vflip =
165 v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
166 V4L2_CID_VFLIP, 0, 1, 1, 0);
167 }
168
169 if (num_flip_ctrls == 3) {
170 wpf->flip.ctrls.hflip =
171 v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
172 V4L2_CID_HFLIP, 0, 1, 1, 0);
173 wpf->flip.ctrls.rotate =
174 v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
175 V4L2_CID_ROTATE, 0, 270, 90, 0);
176 v4l2_ctrl_cluster(3, &wpf->flip.ctrls.vflip);
177 }
178
179 if (wpf->ctrls.error) {
180 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
181 wpf->entity.index);
182 return wpf->ctrls.error;
183 }
184
185 return 0;
186 }
187
188 /* -----------------------------------------------------------------------------
189 * V4L2 Subdevice Core Operations
190 */
191
wpf_s_stream(struct v4l2_subdev * subdev,int enable)192 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
193 {
194 struct vsp1_rwpf *wpf = to_rwpf(subdev);
195 struct vsp1_device *vsp1 = wpf->entity.vsp1;
196
197 if (enable)
198 return 0;
199
200 /*
201 * Write to registers directly when stopping the stream as there will be
202 * no pipeline run to apply the display list.
203 */
204 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
205 vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
206 VI6_WPF_SRCRPF, 0);
207
208 return 0;
209 }
210
211 /* -----------------------------------------------------------------------------
212 * V4L2 Subdevice Operations
213 */
214
215 static const struct v4l2_subdev_video_ops wpf_video_ops = {
216 .s_stream = wpf_s_stream,
217 };
218
219 static const struct v4l2_subdev_ops wpf_ops = {
220 .video = &wpf_video_ops,
221 .pad = &vsp1_rwpf_pad_ops,
222 };
223
224 /* -----------------------------------------------------------------------------
225 * VSP1 Entity Operations
226 */
227
vsp1_wpf_destroy(struct vsp1_entity * entity)228 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
229 {
230 struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
231
232 vsp1_dlm_destroy(wpf->dlm);
233 }
234
wpf_configure_writeback_chain(struct vsp1_rwpf * wpf,struct vsp1_dl_list * dl)235 static int wpf_configure_writeback_chain(struct vsp1_rwpf *wpf,
236 struct vsp1_dl_list *dl)
237 {
238 unsigned int index = wpf->entity.index;
239 struct vsp1_dl_list *dl_next;
240 struct vsp1_dl_body *dlb;
241
242 dl_next = vsp1_dl_list_get(wpf->dlm);
243 if (!dl_next) {
244 dev_err(wpf->entity.vsp1->dev,
245 "Failed to obtain a dl list, disabling writeback\n");
246 return -ENOMEM;
247 }
248
249 dlb = vsp1_dl_list_get_body0(dl_next);
250 vsp1_dl_body_write(dlb, VI6_WPF_WRBCK_CTRL(index), 0);
251 vsp1_dl_list_add_chain(dl, dl_next);
252
253 return 0;
254 }
255
wpf_configure_stream(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)256 static void wpf_configure_stream(struct vsp1_entity *entity,
257 struct vsp1_pipeline *pipe,
258 struct vsp1_dl_list *dl,
259 struct vsp1_dl_body *dlb)
260 {
261 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
262 struct vsp1_device *vsp1 = wpf->entity.vsp1;
263 const struct v4l2_mbus_framefmt *source_format;
264 const struct v4l2_mbus_framefmt *sink_format;
265 unsigned int index = wpf->entity.index;
266 unsigned int i;
267 u32 outfmt = 0;
268 u32 srcrpf = 0;
269 int ret;
270
271 sink_format = vsp1_entity_get_pad_format(&wpf->entity,
272 wpf->entity.config,
273 RWPF_PAD_SINK);
274 source_format = vsp1_entity_get_pad_format(&wpf->entity,
275 wpf->entity.config,
276 RWPF_PAD_SOURCE);
277
278 /* Format */
279 if (!pipe->lif || wpf->writeback) {
280 const struct v4l2_pix_format_mplane *format = &wpf->format;
281 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
282
283 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
284
285 if (wpf->flip.rotate)
286 outfmt |= VI6_WPF_OUTFMT_ROT;
287
288 if (fmtinfo->alpha)
289 outfmt |= VI6_WPF_OUTFMT_PXA;
290 if (fmtinfo->swap_yc)
291 outfmt |= VI6_WPF_OUTFMT_SPYCS;
292 if (fmtinfo->swap_uv)
293 outfmt |= VI6_WPF_OUTFMT_SPUVS;
294
295 /* Destination stride and byte swapping. */
296 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_Y,
297 format->plane_fmt[0].bytesperline);
298 if (format->num_planes > 1)
299 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_STRIDE_C,
300 format->plane_fmt[1].bytesperline);
301
302 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSWAP, fmtinfo->swap);
303
304 if (vsp1_feature(vsp1, VSP1_HAS_WPF_HFLIP) && index == 0)
305 vsp1_wpf_write(wpf, dlb, VI6_WPF_ROT_CTRL,
306 VI6_WPF_ROT_CTRL_LN16 |
307 (256 << VI6_WPF_ROT_CTRL_LMEM_WD_SHIFT));
308 }
309
310 if (sink_format->code != source_format->code)
311 outfmt |= VI6_WPF_OUTFMT_CSC;
312
313 wpf->outfmt = outfmt;
314
315 vsp1_dl_body_write(dlb, VI6_DPR_WPF_FPORCH(index),
316 VI6_DPR_WPF_FPORCH_FP_WPFN);
317
318 /*
319 * Sources. If the pipeline has a single input and BRx is not used,
320 * configure it as the master layer. Otherwise configure all
321 * inputs as sub-layers and select the virtual RPF as the master
322 * layer.
323 */
324 for (i = 0; i < vsp1->info->rpf_count; ++i) {
325 struct vsp1_rwpf *input = pipe->inputs[i];
326
327 if (!input)
328 continue;
329
330 srcrpf |= (!pipe->brx && pipe->num_inputs == 1)
331 ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
332 : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
333 }
334
335 if (pipe->brx)
336 srcrpf |= pipe->brx->type == VSP1_ENTITY_BRU
337 ? VI6_WPF_SRCRPF_VIRACT_MST
338 : VI6_WPF_SRCRPF_VIRACT2_MST;
339
340 vsp1_wpf_write(wpf, dlb, VI6_WPF_SRCRPF, srcrpf);
341
342 /* Enable interrupts. */
343 vsp1_dl_body_write(dlb, VI6_WPF_IRQ_STA(index), 0);
344 vsp1_dl_body_write(dlb, VI6_WPF_IRQ_ENB(index),
345 VI6_WPF_IRQ_ENB_DFEE);
346
347 /*
348 * Configure writeback for display pipelines (the wpf writeback flag is
349 * never set for memory-to-memory pipelines). Start by adding a chained
350 * display list to disable writeback after a single frame, and process
351 * to enable writeback. If the display list allocation fails don't
352 * enable writeback as we wouldn't be able to safely disable it,
353 * resulting in possible memory corruption.
354 */
355 if (wpf->writeback) {
356 ret = wpf_configure_writeback_chain(wpf, dl);
357 if (ret < 0)
358 wpf->writeback = false;
359 }
360
361 vsp1_dl_body_write(dlb, VI6_WPF_WRBCK_CTRL(index),
362 wpf->writeback ? VI6_WPF_WRBCK_CTRL_WBMD : 0);
363 }
364
wpf_configure_frame(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)365 static void wpf_configure_frame(struct vsp1_entity *entity,
366 struct vsp1_pipeline *pipe,
367 struct vsp1_dl_list *dl,
368 struct vsp1_dl_body *dlb)
369 {
370 const unsigned int mask = BIT(WPF_CTRL_VFLIP)
371 | BIT(WPF_CTRL_HFLIP);
372 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
373 unsigned long flags;
374 u32 outfmt;
375
376 spin_lock_irqsave(&wpf->flip.lock, flags);
377 wpf->flip.active = (wpf->flip.active & ~mask)
378 | (wpf->flip.pending & mask);
379 spin_unlock_irqrestore(&wpf->flip.lock, flags);
380
381 outfmt = (wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT) | wpf->outfmt;
382
383 if (wpf->flip.active & BIT(WPF_CTRL_VFLIP))
384 outfmt |= VI6_WPF_OUTFMT_FLP;
385 if (wpf->flip.active & BIT(WPF_CTRL_HFLIP))
386 outfmt |= VI6_WPF_OUTFMT_HFLP;
387
388 vsp1_wpf_write(wpf, dlb, VI6_WPF_OUTFMT, outfmt);
389 }
390
wpf_configure_partition(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)391 static void wpf_configure_partition(struct vsp1_entity *entity,
392 struct vsp1_pipeline *pipe,
393 struct vsp1_dl_list *dl,
394 struct vsp1_dl_body *dlb)
395 {
396 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
397 struct vsp1_device *vsp1 = wpf->entity.vsp1;
398 struct vsp1_rwpf_memory mem = wpf->mem;
399 const struct v4l2_mbus_framefmt *sink_format;
400 const struct v4l2_pix_format_mplane *format = &wpf->format;
401 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
402 unsigned int width;
403 unsigned int height;
404 unsigned int left;
405 unsigned int offset;
406 unsigned int flip;
407 unsigned int i;
408
409 sink_format = vsp1_entity_get_pad_format(&wpf->entity,
410 wpf->entity.config,
411 RWPF_PAD_SINK);
412 width = sink_format->width;
413 height = sink_format->height;
414 left = 0;
415
416 /*
417 * Cropping. The partition algorithm can split the image into
418 * multiple slices.
419 */
420 if (pipe->partitions > 1) {
421 width = pipe->partition->wpf.width;
422 left = pipe->partition->wpf.left;
423 }
424
425 vsp1_wpf_write(wpf, dlb, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
426 (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
427 (width << VI6_WPF_SZCLIP_SIZE_SHIFT));
428 vsp1_wpf_write(wpf, dlb, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
429 (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
430 (height << VI6_WPF_SZCLIP_SIZE_SHIFT));
431
432 /*
433 * For display pipelines without writeback enabled there's no memory
434 * address to configure, return now.
435 */
436 if (pipe->lif && !wpf->writeback)
437 return;
438
439 /*
440 * Update the memory offsets based on flipping configuration.
441 * The destination addresses point to the locations where the
442 * VSP starts writing to memory, which can be any corner of the
443 * image depending on the combination of flipping and rotation.
444 */
445
446 /*
447 * First take the partition left coordinate into account.
448 * Compute the offset to order the partitions correctly on the
449 * output based on whether flipping is enabled. Consider
450 * horizontal flipping when rotation is disabled but vertical
451 * flipping when rotation is enabled, as rotating the image
452 * switches the horizontal and vertical directions. The offset
453 * is applied horizontally or vertically accordingly.
454 */
455 flip = wpf->flip.active;
456
457 if (flip & BIT(WPF_CTRL_HFLIP) && !wpf->flip.rotate)
458 offset = format->width - left - width;
459 else if (flip & BIT(WPF_CTRL_VFLIP) && wpf->flip.rotate)
460 offset = format->height - left - width;
461 else
462 offset = left;
463
464 for (i = 0; i < format->num_planes; ++i) {
465 unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
466 unsigned int vsub = i > 0 ? fmtinfo->vsub : 1;
467
468 if (wpf->flip.rotate)
469 mem.addr[i] += offset / vsub
470 * format->plane_fmt[i].bytesperline;
471 else
472 mem.addr[i] += offset / hsub
473 * fmtinfo->bpp[i] / 8;
474 }
475
476 if (flip & BIT(WPF_CTRL_VFLIP)) {
477 /*
478 * When rotating the output (after rotation) image
479 * height is equal to the partition width (before
480 * rotation). Otherwise it is equal to the output
481 * image height.
482 */
483 if (wpf->flip.rotate)
484 height = width;
485 else
486 height = format->height;
487
488 mem.addr[0] += (height - 1)
489 * format->plane_fmt[0].bytesperline;
490
491 if (format->num_planes > 1) {
492 offset = (height / fmtinfo->vsub - 1)
493 * format->plane_fmt[1].bytesperline;
494 mem.addr[1] += offset;
495 mem.addr[2] += offset;
496 }
497 }
498
499 if (wpf->flip.rotate && !(flip & BIT(WPF_CTRL_HFLIP))) {
500 unsigned int hoffset = max(0, (int)format->width - 16);
501
502 /*
503 * Compute the output coordinate. The partition
504 * horizontal (left) offset becomes a vertical offset.
505 */
506 for (i = 0; i < format->num_planes; ++i) {
507 unsigned int hsub = i > 0 ? fmtinfo->hsub : 1;
508
509 mem.addr[i] += hoffset / hsub
510 * fmtinfo->bpp[i] / 8;
511 }
512 }
513
514 /*
515 * On Gen3+ hardware the SPUVS bit has no effect on 3-planar
516 * formats. Swap the U and V planes manually in that case.
517 */
518 if (vsp1->info->gen >= 3 && format->num_planes == 3 &&
519 fmtinfo->swap_uv)
520 swap(mem.addr[1], mem.addr[2]);
521
522 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_Y, mem.addr[0]);
523 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C0, mem.addr[1]);
524 vsp1_wpf_write(wpf, dlb, VI6_WPF_DSTM_ADDR_C1, mem.addr[2]);
525
526 /*
527 * Writeback operates in single-shot mode and lasts for a single frame,
528 * reset the writeback flag to false for the next frame.
529 */
530 wpf->writeback = false;
531 }
532
wpf_max_width(struct vsp1_entity * entity,struct vsp1_pipeline * pipe)533 static unsigned int wpf_max_width(struct vsp1_entity *entity,
534 struct vsp1_pipeline *pipe)
535 {
536 struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
537
538 return wpf->flip.rotate ? 256 : wpf->max_width;
539 }
540
wpf_partition(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_partition * partition,unsigned int partition_idx,struct vsp1_partition_window * window)541 static void wpf_partition(struct vsp1_entity *entity,
542 struct vsp1_pipeline *pipe,
543 struct vsp1_partition *partition,
544 unsigned int partition_idx,
545 struct vsp1_partition_window *window)
546 {
547 partition->wpf = *window;
548 }
549
550 static const struct vsp1_entity_operations wpf_entity_ops = {
551 .destroy = vsp1_wpf_destroy,
552 .configure_stream = wpf_configure_stream,
553 .configure_frame = wpf_configure_frame,
554 .configure_partition = wpf_configure_partition,
555 .max_width = wpf_max_width,
556 .partition = wpf_partition,
557 };
558
559 /* -----------------------------------------------------------------------------
560 * Initialization and Cleanup
561 */
562
vsp1_wpf_create(struct vsp1_device * vsp1,unsigned int index)563 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
564 {
565 struct vsp1_rwpf *wpf;
566 char name[6];
567 int ret;
568
569 wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
570 if (wpf == NULL)
571 return ERR_PTR(-ENOMEM);
572
573 if (vsp1->info->gen == 2) {
574 wpf->max_width = WPF_GEN2_MAX_WIDTH;
575 wpf->max_height = WPF_GEN2_MAX_HEIGHT;
576 } else {
577 wpf->max_width = WPF_GEN3_MAX_WIDTH;
578 wpf->max_height = WPF_GEN3_MAX_HEIGHT;
579 }
580
581 wpf->entity.ops = &wpf_entity_ops;
582 wpf->entity.type = VSP1_ENTITY_WPF;
583 wpf->entity.index = index;
584
585 sprintf(name, "wpf.%u", index);
586 ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops,
587 MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
588 if (ret < 0)
589 return ERR_PTR(ret);
590
591 /* Initialize the display list manager. */
592 wpf->dlm = vsp1_dlm_create(vsp1, index, 64);
593 if (!wpf->dlm) {
594 ret = -ENOMEM;
595 goto error;
596 }
597
598 /* Initialize the control handler. */
599 ret = wpf_init_controls(wpf);
600 if (ret < 0) {
601 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
602 index);
603 goto error;
604 }
605
606 v4l2_ctrl_handler_setup(&wpf->ctrls);
607
608 return wpf;
609
610 error:
611 vsp1_entity_destroy(&wpf->entity);
612 return ERR_PTR(ret);
613 }
614
