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7#include <linux/errno.h>
8#include <linux/interrupt.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/of.h>
12#include <linux/pm_runtime.h>
13#include <linux/slab.h>
14
15#include <media/v4l2-event.h>
16#include <media/v4l2-ioctl.h>
17
18#include "bdisp.h"
19
20#define BDISP_MAX_CTRL_NUM 10
21
22#define BDISP_WORK_TIMEOUT ((100 * HZ) / 1000)
23
24
25#define BDISP_PARAMS BIT(0)
26#define BDISP_SRC_FMT BIT(1)
27#define BDISP_DST_FMT BIT(2)
28#define BDISP_CTX_STOP_REQ BIT(3)
29#define BDISP_CTX_ABORT BIT(4)
30
31#define BDISP_MIN_W 1
32#define BDISP_MAX_W 8191
33#define BDISP_MIN_H 1
34#define BDISP_MAX_H 8191
35
36#define fh_to_ctx(__fh) container_of(__fh, struct bdisp_ctx, fh)
37
38enum bdisp_dev_flags {
39 ST_M2M_OPEN,
40 ST_M2M_RUNNING,
41 ST_M2M_SUSPENDED,
42 ST_M2M_SUSPENDING,
43};
44
45static const struct bdisp_fmt bdisp_formats[] = {
46
47 {
48 .pixelformat = V4L2_PIX_FMT_ABGR32,
49 .nb_planes = 1,
50 .bpp = 32,
51 .bpp_plane0 = 32,
52 .w_align = 1,
53 .h_align = 1
54 },
55
56 {
57 .pixelformat = V4L2_PIX_FMT_XBGR32,
58 .nb_planes = 1,
59 .bpp = 32,
60 .bpp_plane0 = 32,
61 .w_align = 1,
62 .h_align = 1
63 },
64
65 {
66 .pixelformat = V4L2_PIX_FMT_RGB565,
67 .nb_planes = 1,
68 .bpp = 16,
69 .bpp_plane0 = 16,
70 .w_align = 1,
71 .h_align = 1
72 },
73
74 {
75 .pixelformat = V4L2_PIX_FMT_NV12,
76 .nb_planes = 2,
77 .bpp = 12,
78 .bpp_plane0 = 8,
79 .w_align = 2,
80 .h_align = 2
81 },
82
83 {
84 .pixelformat = V4L2_PIX_FMT_RGB24,
85 .nb_planes = 1,
86 .bpp = 24,
87 .bpp_plane0 = 24,
88 .w_align = 1,
89 .h_align = 1
90 },
91
92
93
94 {
95 .pixelformat = V4L2_PIX_FMT_YUV420,
96 .nb_planes = 3,
97 .bpp = 12,
98 .bpp_plane0 = 8,
99 .w_align = 2,
100 .h_align = 2
101 }
102};
103
104
105#define BDISP_DEF_WIDTH 1920
106#define BDISP_DEF_HEIGHT 1080
107
108static const struct bdisp_frame bdisp_dflt_fmt = {
109 .width = BDISP_DEF_WIDTH,
110 .height = BDISP_DEF_HEIGHT,
111 .fmt = &bdisp_formats[0],
112 .field = V4L2_FIELD_NONE,
113 .bytesperline = BDISP_DEF_WIDTH * 4,
114 .sizeimage = BDISP_DEF_WIDTH * BDISP_DEF_HEIGHT * 4,
115 .colorspace = V4L2_COLORSPACE_REC709,
116 .crop = {0, 0, BDISP_DEF_WIDTH, BDISP_DEF_HEIGHT},
117 .paddr = {0, 0, 0, 0}
118};
119
120static inline void bdisp_ctx_state_lock_set(u32 state, struct bdisp_ctx *ctx)
121{
122 unsigned long flags;
123
124 spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
125 ctx->state |= state;
126 spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
127}
128
129static inline void bdisp_ctx_state_lock_clear(u32 state, struct bdisp_ctx *ctx)
130{
131 unsigned long flags;
132
133 spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
134 ctx->state &= ~state;
135 spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
136}
137
138static inline bool bdisp_ctx_state_is_set(u32 mask, struct bdisp_ctx *ctx)
139{
140 unsigned long flags;
141 bool ret;
142
143 spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
144 ret = (ctx->state & mask) == mask;
145 spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
146
147 return ret;
148}
149
150static const struct bdisp_fmt *bdisp_find_fmt(u32 pixelformat)
151{
152 const struct bdisp_fmt *fmt;
153 unsigned int i;
154
155 for (i = 0; i < ARRAY_SIZE(bdisp_formats); i++) {
156 fmt = &bdisp_formats[i];
157 if (fmt->pixelformat == pixelformat)
158 return fmt;
159 }
160
161 return NULL;
162}
163
164static struct bdisp_frame *ctx_get_frame(struct bdisp_ctx *ctx,
165 enum v4l2_buf_type type)
166{
167 switch (type) {
168 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
169 return &ctx->src;
170 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
171 return &ctx->dst;
172 default:
173 dev_err(ctx->bdisp_dev->dev,
174 "Wrong buffer/video queue type (%d)\n", type);
175 break;
176 }
177
178 return ERR_PTR(-EINVAL);
179}
180
181static void bdisp_job_finish(struct bdisp_ctx *ctx, int vb_state)
182{
183 struct vb2_v4l2_buffer *src_vb, *dst_vb;
184
185 if (WARN(!ctx || !ctx->fh.m2m_ctx, "Null hardware context\n"))
186 return;
187
188 dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__);
189
190 src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
191 dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
192
193 if (src_vb && dst_vb) {
194 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
195 dst_vb->timecode = src_vb->timecode;
196 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
197 dst_vb->flags |= src_vb->flags &
198 V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
199
200 v4l2_m2m_buf_done(src_vb, vb_state);
201 v4l2_m2m_buf_done(dst_vb, vb_state);
202
203 v4l2_m2m_job_finish(ctx->bdisp_dev->m2m.m2m_dev,
204 ctx->fh.m2m_ctx);
205 }
206}
207
208static int bdisp_ctx_stop_req(struct bdisp_ctx *ctx)
209{
210 struct bdisp_ctx *curr_ctx;
211 struct bdisp_dev *bdisp = ctx->bdisp_dev;
212 int ret;
213
214 dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__);
215
216 cancel_delayed_work(&bdisp->timeout_work);
217
218 curr_ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
219 if (!test_bit(ST_M2M_RUNNING, &bdisp->state) || (curr_ctx != ctx))
220 return 0;
221
222 bdisp_ctx_state_lock_set(BDISP_CTX_STOP_REQ, ctx);
223
224 ret = wait_event_timeout(bdisp->irq_queue,
225 !bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx),
226 BDISP_WORK_TIMEOUT);
227
228 if (!ret) {
229 dev_err(ctx->bdisp_dev->dev, "%s IRQ timeout\n", __func__);
230 return -ETIMEDOUT;
231 }
232
233 return 0;
234}
235
236static void __bdisp_job_abort(struct bdisp_ctx *ctx)
237{
238 int ret;
239
240 ret = bdisp_ctx_stop_req(ctx);
241 if ((ret == -ETIMEDOUT) || (ctx->state & BDISP_CTX_ABORT)) {
242 bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ | BDISP_CTX_ABORT,
243 ctx);
244 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
245 }
246}
247
248static void bdisp_job_abort(void *priv)
249{
250 __bdisp_job_abort((struct bdisp_ctx *)priv);
251}
252
253static int bdisp_get_addr(struct bdisp_ctx *ctx, struct vb2_buffer *vb,
254 struct bdisp_frame *frame, dma_addr_t *paddr)
255{
256 if (!vb || !frame)
257 return -EINVAL;
258
259 paddr[0] = vb2_dma_contig_plane_dma_addr(vb, 0);
260
261 if (frame->fmt->nb_planes > 1)
262
263 paddr[1] = (dma_addr_t)(paddr[0] +
264 frame->bytesperline * frame->height);
265
266 if (frame->fmt->nb_planes > 2)
267
268 paddr[2] = (dma_addr_t)(paddr[1] +
269 (frame->bytesperline * frame->height) / 4);
270
271 if (frame->fmt->nb_planes > 3)
272 dev_dbg(ctx->bdisp_dev->dev, "ignoring some planes\n");
273
274 dev_dbg(ctx->bdisp_dev->dev,
275 "%s plane[0]=%pad plane[1]=%pad plane[2]=%pad\n",
276 __func__, &paddr[0], &paddr[1], &paddr[2]);
277
278 return 0;
279}
280
281static int bdisp_get_bufs(struct bdisp_ctx *ctx)
282{
283 struct bdisp_frame *src, *dst;
284 struct vb2_v4l2_buffer *src_vb, *dst_vb;
285 int ret;
286
287 src = &ctx->src;
288 dst = &ctx->dst;
289
290 src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
291 ret = bdisp_get_addr(ctx, &src_vb->vb2_buf, src, src->paddr);
292 if (ret)
293 return ret;
294
295 dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
296 ret = bdisp_get_addr(ctx, &dst_vb->vb2_buf, dst, dst->paddr);
297 if (ret)
298 return ret;
299
300 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
301
302 return 0;
303}
304
305static void bdisp_device_run(void *priv)
306{
307 struct bdisp_ctx *ctx = priv;
308 struct bdisp_dev *bdisp;
309 unsigned long flags;
310 int err = 0;
311
312 if (WARN(!ctx, "Null hardware context\n"))
313 return;
314
315 bdisp = ctx->bdisp_dev;
316 dev_dbg(bdisp->dev, "%s\n", __func__);
317 spin_lock_irqsave(&bdisp->slock, flags);
318
319 if (bdisp->m2m.ctx != ctx) {
320 dev_dbg(bdisp->dev, "ctx updated: %p -> %p\n",
321 bdisp->m2m.ctx, ctx);
322 ctx->state |= BDISP_PARAMS;
323 bdisp->m2m.ctx = ctx;
324 }
325
326 if (ctx->state & BDISP_CTX_STOP_REQ) {
327 ctx->state &= ~BDISP_CTX_STOP_REQ;
328 ctx->state |= BDISP_CTX_ABORT;
329 wake_up(&bdisp->irq_queue);
330 goto out;
331 }
332
333 err = bdisp_get_bufs(ctx);
334 if (err) {
335 dev_err(bdisp->dev, "cannot get address\n");
336 goto out;
337 }
338
339 bdisp_dbg_perf_begin(bdisp);
340
341 err = bdisp_hw_reset(bdisp);
342 if (err) {
343 dev_err(bdisp->dev, "could not get HW ready\n");
344 goto out;
345 }
346
347 err = bdisp_hw_update(ctx);
348 if (err) {
349 dev_err(bdisp->dev, "could not send HW request\n");
350 goto out;
351 }
352
353 queue_delayed_work(bdisp->work_queue, &bdisp->timeout_work,
354 BDISP_WORK_TIMEOUT);
355 set_bit(ST_M2M_RUNNING, &bdisp->state);
356out:
357 ctx->state &= ~BDISP_PARAMS;
358 spin_unlock_irqrestore(&bdisp->slock, flags);
359 if (err)
360 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
361}
362
363static const struct v4l2_m2m_ops bdisp_m2m_ops = {
364 .device_run = bdisp_device_run,
365 .job_abort = bdisp_job_abort,
366};
367
368static int __bdisp_s_ctrl(struct bdisp_ctx *ctx, struct v4l2_ctrl *ctrl)
369{
370 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
371 return 0;
372
373 switch (ctrl->id) {
374 case V4L2_CID_HFLIP:
375 ctx->hflip = ctrl->val;
376 break;
377 case V4L2_CID_VFLIP:
378 ctx->vflip = ctrl->val;
379 break;
380 default:
381 dev_err(ctx->bdisp_dev->dev, "unknown control %d\n", ctrl->id);
382 return -EINVAL;
383 }
384
385 ctx->state |= BDISP_PARAMS;
386
387 return 0;
388}
389
390static int bdisp_s_ctrl(struct v4l2_ctrl *ctrl)
391{
392 struct bdisp_ctx *ctx = container_of(ctrl->handler, struct bdisp_ctx,
393 ctrl_handler);
394 unsigned long flags;
395 int ret;
396
397 spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
398 ret = __bdisp_s_ctrl(ctx, ctrl);
399 spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
400
401 return ret;
402}
403
404static const struct v4l2_ctrl_ops bdisp_c_ops = {
405 .s_ctrl = bdisp_s_ctrl,
406};
407
408static int bdisp_ctrls_create(struct bdisp_ctx *ctx)
409{
410 if (ctx->ctrls_rdy)
411 return 0;
412
413 v4l2_ctrl_handler_init(&ctx->ctrl_handler, BDISP_MAX_CTRL_NUM);
414
415 ctx->bdisp_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
416 &bdisp_c_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
417 ctx->bdisp_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
418 &bdisp_c_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
419
420 if (ctx->ctrl_handler.error) {
421 int err = ctx->ctrl_handler.error;
422
423 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
424 return err;
425 }
426
427 ctx->ctrls_rdy = true;
428
429 return 0;
430}
431
432static void bdisp_ctrls_delete(struct bdisp_ctx *ctx)
433{
434 if (ctx->ctrls_rdy) {
435 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
436 ctx->ctrls_rdy = false;
437 }
438}
439
440static int bdisp_queue_setup(struct vb2_queue *vq,
441 unsigned int *nb_buf, unsigned int *nb_planes,
442 unsigned int sizes[], struct device *alloc_devs[])
443{
444 struct bdisp_ctx *ctx = vb2_get_drv_priv(vq);
445 struct bdisp_frame *frame = ctx_get_frame(ctx, vq->type);
446
447 if (IS_ERR(frame)) {
448 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
449 return PTR_ERR(frame);
450 }
451
452 if (!frame->fmt) {
453 dev_err(ctx->bdisp_dev->dev, "Invalid format\n");
454 return -EINVAL;
455 }
456
457 if (*nb_planes)
458 return sizes[0] < frame->sizeimage ? -EINVAL : 0;
459
460 *nb_planes = 1;
461 sizes[0] = frame->sizeimage;
462
463 return 0;
464}
465
466static int bdisp_buf_prepare(struct vb2_buffer *vb)
467{
468 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
469 struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type);
470
471 if (IS_ERR(frame)) {
472 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
473 return PTR_ERR(frame);
474 }
475
476 if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
477 vb2_set_plane_payload(vb, 0, frame->sizeimage);
478
479 return 0;
480}
481
482static void bdisp_buf_queue(struct vb2_buffer *vb)
483{
484 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
485 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
486
487
488 if (!vb2_get_plane_payload(vb, 0)) {
489 dev_dbg(ctx->bdisp_dev->dev, "0 data buffer, skip it\n");
490 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
491 return;
492 }
493
494 if (ctx->fh.m2m_ctx)
495 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
496}
497
498static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count)
499{
500 struct bdisp_ctx *ctx = q->drv_priv;
501 struct vb2_v4l2_buffer *buf;
502 int ret = pm_runtime_get_sync(ctx->bdisp_dev->dev);
503
504 if (ret < 0) {
505 dev_err(ctx->bdisp_dev->dev, "failed to set runtime PM\n");
506
507 if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
508 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
509 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
510 } else {
511 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
512 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
513 }
514
515 return ret;
516 }
517
518 return 0;
519}
520
521static void bdisp_stop_streaming(struct vb2_queue *q)
522{
523 struct bdisp_ctx *ctx = q->drv_priv;
524
525 __bdisp_job_abort(ctx);
526
527 pm_runtime_put(ctx->bdisp_dev->dev);
528}
529
530static const struct vb2_ops bdisp_qops = {
531 .queue_setup = bdisp_queue_setup,
532 .buf_prepare = bdisp_buf_prepare,
533 .buf_queue = bdisp_buf_queue,
534 .wait_prepare = vb2_ops_wait_prepare,
535 .wait_finish = vb2_ops_wait_finish,
536 .stop_streaming = bdisp_stop_streaming,
537 .start_streaming = bdisp_start_streaming,
538};
539
540static int queue_init(void *priv,
541 struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
542{
543 struct bdisp_ctx *ctx = priv;
544 int ret;
545
546 memset(src_vq, 0, sizeof(*src_vq));
547 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
548 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
549 src_vq->drv_priv = ctx;
550 src_vq->ops = &bdisp_qops;
551 src_vq->mem_ops = &vb2_dma_contig_memops;
552 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
553 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
554 src_vq->lock = &ctx->bdisp_dev->lock;
555 src_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
556
557 ret = vb2_queue_init(src_vq);
558 if (ret)
559 return ret;
560
561 memset(dst_vq, 0, sizeof(*dst_vq));
562 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
563 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
564 dst_vq->drv_priv = ctx;
565 dst_vq->ops = &bdisp_qops;
566 dst_vq->mem_ops = &vb2_dma_contig_memops;
567 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
568 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
569 dst_vq->lock = &ctx->bdisp_dev->lock;
570 dst_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
571
572 return vb2_queue_init(dst_vq);
573}
574
575static int bdisp_open(struct file *file)
576{
577 struct bdisp_dev *bdisp = video_drvdata(file);
578 struct bdisp_ctx *ctx = NULL;
579 int ret;
580
581 if (mutex_lock_interruptible(&bdisp->lock))
582 return -ERESTARTSYS;
583
584
585 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
586 if (!ctx) {
587 ret = -ENOMEM;
588 goto unlock;
589 }
590 ctx->bdisp_dev = bdisp;
591
592 if (bdisp_hw_alloc_nodes(ctx)) {
593 dev_err(bdisp->dev, "no memory for nodes\n");
594 ret = -ENOMEM;
595 goto mem_ctx;
596 }
597
598 v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev);
599
600 ret = bdisp_ctrls_create(ctx);
601 if (ret) {
602 dev_err(bdisp->dev, "Failed to create control\n");
603 goto error_fh;
604 }
605
606
607 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
608 file->private_data = &ctx->fh;
609 v4l2_fh_add(&ctx->fh);
610
611
612 ctx->src = bdisp_dflt_fmt;
613 ctx->dst = bdisp_dflt_fmt;
614
615
616 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx,
617 queue_init);
618 if (IS_ERR(ctx->fh.m2m_ctx)) {
619 dev_err(bdisp->dev, "Failed to initialize m2m context\n");
620 ret = PTR_ERR(ctx->fh.m2m_ctx);
621 goto error_ctrls;
622 }
623
624 bdisp->m2m.refcnt++;
625 set_bit(ST_M2M_OPEN, &bdisp->state);
626
627 dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx);
628
629 mutex_unlock(&bdisp->lock);
630
631 return 0;
632
633error_ctrls:
634 bdisp_ctrls_delete(ctx);
635 v4l2_fh_del(&ctx->fh);
636error_fh:
637 v4l2_fh_exit(&ctx->fh);
638 bdisp_hw_free_nodes(ctx);
639mem_ctx:
640 kfree(ctx);
641unlock:
642 mutex_unlock(&bdisp->lock);
643
644 return ret;
645}
646
647static int bdisp_release(struct file *file)
648{
649 struct bdisp_ctx *ctx = fh_to_ctx(file->private_data);
650 struct bdisp_dev *bdisp = ctx->bdisp_dev;
651
652 dev_dbg(bdisp->dev, "%s\n", __func__);
653
654 mutex_lock(&bdisp->lock);
655
656 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
657
658 bdisp_ctrls_delete(ctx);
659
660 v4l2_fh_del(&ctx->fh);
661 v4l2_fh_exit(&ctx->fh);
662
663 if (--bdisp->m2m.refcnt <= 0)
664 clear_bit(ST_M2M_OPEN, &bdisp->state);
665
666 bdisp_hw_free_nodes(ctx);
667
668 kfree(ctx);
669
670 mutex_unlock(&bdisp->lock);
671
672 return 0;
673}
674
675static const struct v4l2_file_operations bdisp_fops = {
676 .owner = THIS_MODULE,
677 .open = bdisp_open,
678 .release = bdisp_release,
679 .poll = v4l2_m2m_fop_poll,
680 .unlocked_ioctl = video_ioctl2,
681 .mmap = v4l2_m2m_fop_mmap,
682};
683
684static int bdisp_querycap(struct file *file, void *fh,
685 struct v4l2_capability *cap)
686{
687 struct bdisp_ctx *ctx = fh_to_ctx(fh);
688 struct bdisp_dev *bdisp = ctx->bdisp_dev;
689
690 strscpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver));
691 strscpy(cap->card, bdisp->pdev->name, sizeof(cap->card));
692 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s%d",
693 BDISP_NAME, bdisp->id);
694 return 0;
695}
696
697static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
698{
699 struct bdisp_ctx *ctx = fh_to_ctx(fh);
700 const struct bdisp_fmt *fmt;
701
702 if (f->index >= ARRAY_SIZE(bdisp_formats))
703 return -EINVAL;
704
705 fmt = &bdisp_formats[f->index];
706
707 if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) &&
708 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
709 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
710 return -EINVAL;
711 }
712 f->pixelformat = fmt->pixelformat;
713
714 return 0;
715}
716
717static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
718{
719 struct bdisp_ctx *ctx = fh_to_ctx(fh);
720 struct v4l2_pix_format *pix;
721 struct bdisp_frame *frame = ctx_get_frame(ctx, f->type);
722
723 if (IS_ERR(frame)) {
724 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
725 return PTR_ERR(frame);
726 }
727
728 pix = &f->fmt.pix;
729 pix->width = frame->width;
730 pix->height = frame->height;
731 pix->pixelformat = frame->fmt->pixelformat;
732 pix->field = frame->field;
733 pix->bytesperline = frame->bytesperline;
734 pix->sizeimage = frame->sizeimage;
735 pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
736 frame->colorspace : bdisp_dflt_fmt.colorspace;
737
738 return 0;
739}
740
741static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
742{
743 struct bdisp_ctx *ctx = fh_to_ctx(fh);
744 struct v4l2_pix_format *pix = &f->fmt.pix;
745 const struct bdisp_fmt *format;
746 u32 in_w, in_h;
747
748 format = bdisp_find_fmt(pix->pixelformat);
749 if (!format) {
750 dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
751 pix->pixelformat);
752 return -EINVAL;
753 }
754
755
756 if ((format->pixelformat == V4L2_PIX_FMT_YUV420) &&
757 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
758 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
759 return -EINVAL;
760 }
761
762
763 if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
764 (pix->field != V4L2_FIELD_INTERLACED))
765 pix->field = V4L2_FIELD_NONE;
766
767
768 in_w = pix->width;
769 in_h = pix->height;
770 v4l_bound_align_image(&pix->width,
771 BDISP_MIN_W, BDISP_MAX_W,
772 ffs(format->w_align) - 1,
773 &pix->height,
774 BDISP_MIN_H, BDISP_MAX_H,
775 ffs(format->h_align) - 1,
776 0);
777 if ((pix->width != in_w) || (pix->height != in_h))
778 dev_dbg(ctx->bdisp_dev->dev,
779 "%s size updated: %dx%d -> %dx%d\n", __func__,
780 in_w, in_h, pix->width, pix->height);
781
782 pix->bytesperline = (pix->width * format->bpp_plane0) / 8;
783 pix->sizeimage = (pix->width * pix->height * format->bpp) / 8;
784
785 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
786 pix->colorspace = bdisp_dflt_fmt.colorspace;
787
788 return 0;
789}
790
791static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
792{
793 struct bdisp_ctx *ctx = fh_to_ctx(fh);
794 struct vb2_queue *vq;
795 struct bdisp_frame *frame;
796 struct v4l2_pix_format *pix;
797 int ret;
798 u32 state;
799
800 ret = bdisp_try_fmt(file, fh, f);
801 if (ret) {
802 dev_err(ctx->bdisp_dev->dev, "Cannot set format\n");
803 return ret;
804 }
805
806 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
807 if (vb2_is_streaming(vq)) {
808 dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type);
809 return -EBUSY;
810 }
811
812 frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
813 &ctx->src : &ctx->dst;
814 pix = &f->fmt.pix;
815 frame->fmt = bdisp_find_fmt(pix->pixelformat);
816 if (!frame->fmt) {
817 dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
818 pix->pixelformat);
819 return -EINVAL;
820 }
821
822 frame->width = pix->width;
823 frame->height = pix->height;
824 frame->bytesperline = pix->bytesperline;
825 frame->sizeimage = pix->sizeimage;
826 frame->field = pix->field;
827 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
828 frame->colorspace = pix->colorspace;
829
830 frame->crop.width = frame->width;
831 frame->crop.height = frame->height;
832 frame->crop.left = 0;
833 frame->crop.top = 0;
834
835 state = BDISP_PARAMS;
836 state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
837 BDISP_DST_FMT : BDISP_SRC_FMT;
838 bdisp_ctx_state_lock_set(state, ctx);
839
840 return 0;
841}
842
843static int bdisp_g_selection(struct file *file, void *fh,
844 struct v4l2_selection *s)
845{
846 struct bdisp_frame *frame;
847 struct bdisp_ctx *ctx = fh_to_ctx(fh);
848
849 frame = ctx_get_frame(ctx, s->type);
850 if (IS_ERR(frame)) {
851 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
852 return PTR_ERR(frame);
853 }
854
855 switch (s->type) {
856 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
857 switch (s->target) {
858 case V4L2_SEL_TGT_CROP:
859
860 s->r = frame->crop;
861 break;
862 case V4L2_SEL_TGT_CROP_DEFAULT:
863 case V4L2_SEL_TGT_CROP_BOUNDS:
864
865 s->r.left = 0;
866 s->r.top = 0;
867 s->r.width = frame->width;
868 s->r.height = frame->height;
869 break;
870 default:
871 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
872 return -EINVAL;
873 }
874 break;
875
876 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
877 switch (s->target) {
878 case V4L2_SEL_TGT_COMPOSE:
879 case V4L2_SEL_TGT_COMPOSE_PADDED:
880
881 s->r = frame->crop;
882 break;
883 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
884 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
885
886 s->r.left = 0;
887 s->r.top = 0;
888 s->r.width = frame->width;
889 s->r.height = frame->height;
890 break;
891 default:
892 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
893 return -EINVAL;
894 }
895 break;
896
897 default:
898 dev_err(ctx->bdisp_dev->dev, "Invalid type\n");
899 return -EINVAL;
900 }
901
902 return 0;
903}
904
905static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
906{
907
908
909 if (a->left < b->left || a->top < b->top)
910 return 0;
911
912 if (a->left + a->width > b->left + b->width)
913 return 0;
914
915 if (a->top + a->height > b->top + b->height)
916 return 0;
917
918 return 1;
919}
920
921static int bdisp_s_selection(struct file *file, void *fh,
922 struct v4l2_selection *s)
923{
924 struct bdisp_frame *frame;
925 struct bdisp_ctx *ctx = fh_to_ctx(fh);
926 struct v4l2_rect *in, out;
927 bool valid = false;
928
929 if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
930 (s->target == V4L2_SEL_TGT_CROP))
931 valid = true;
932
933 if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
934 (s->target == V4L2_SEL_TGT_COMPOSE))
935 valid = true;
936
937 if (!valid) {
938 dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n");
939 return -EINVAL;
940 }
941
942 frame = ctx_get_frame(ctx, s->type);
943 if (IS_ERR(frame)) {
944 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
945 return PTR_ERR(frame);
946 }
947
948 in = &s->r;
949 out = *in;
950
951
952 out.left = ALIGN(in->left, frame->fmt->w_align);
953 out.top = ALIGN(in->top, frame->fmt->h_align);
954
955 if ((out.left < 0) || (out.left >= frame->width) ||
956 (out.top < 0) || (out.top >= frame->height)) {
957 dev_err(ctx->bdisp_dev->dev,
958 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
959 out.width, out.height, out.left, out.top,
960 frame->width, frame->height);
961 return -EINVAL;
962 }
963
964
965 out.width = ALIGN(in->width, frame->fmt->w_align);
966 out.height = ALIGN(in->height, frame->fmt->w_align);
967
968 if (((out.left + out.width) > frame->width) ||
969 ((out.top + out.height) > frame->height)) {
970 dev_err(ctx->bdisp_dev->dev,
971 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
972 out.width, out.height, out.left, out.top,
973 frame->width, frame->height);
974 return -EINVAL;
975 }
976
977
978 if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
979 return -ERANGE;
980
981 if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
982 return -ERANGE;
983
984 if ((out.left != in->left) || (out.top != in->top) ||
985 (out.width != in->width) || (out.height != in->height)) {
986 dev_dbg(ctx->bdisp_dev->dev,
987 "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
988 __func__, in->width, in->height, in->left, in->top,
989 out.width, out.height, out.left, out.top);
990 *in = out;
991 }
992
993 frame->crop = out;
994
995 bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
996
997 return 0;
998}
999
1000static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1001{
1002 struct bdisp_ctx *ctx = fh_to_ctx(fh);
1003
1004 if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
1005 !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
1006 dev_err(ctx->bdisp_dev->dev, "src not defined\n");
1007 return -EINVAL;
1008 }
1009
1010 if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
1011 !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
1012 dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
1013 return -EINVAL;
1014 }
1015
1016 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
1017}
1018
1019static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
1020 .vidioc_querycap = bdisp_querycap,
1021 .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt,
1022 .vidioc_enum_fmt_vid_out = bdisp_enum_fmt,
1023 .vidioc_g_fmt_vid_cap = bdisp_g_fmt,
1024 .vidioc_g_fmt_vid_out = bdisp_g_fmt,
1025 .vidioc_try_fmt_vid_cap = bdisp_try_fmt,
1026 .vidioc_try_fmt_vid_out = bdisp_try_fmt,
1027 .vidioc_s_fmt_vid_cap = bdisp_s_fmt,
1028 .vidioc_s_fmt_vid_out = bdisp_s_fmt,
1029 .vidioc_g_selection = bdisp_g_selection,
1030 .vidioc_s_selection = bdisp_s_selection,
1031 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
1032 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
1033 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
1034 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
1035 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
1036 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
1037 .vidioc_streamon = bdisp_streamon,
1038 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
1039 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1040 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1041};
1042
1043static int bdisp_register_device(struct bdisp_dev *bdisp)
1044{
1045 int ret;
1046
1047 if (!bdisp)
1048 return -ENODEV;
1049
1050 bdisp->vdev.fops = &bdisp_fops;
1051 bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops;
1052 bdisp->vdev.release = video_device_release_empty;
1053 bdisp->vdev.lock = &bdisp->lock;
1054 bdisp->vdev.vfl_dir = VFL_DIR_M2M;
1055 bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev;
1056 bdisp->vdev.device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
1057 snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
1058 BDISP_NAME, bdisp->id);
1059
1060 video_set_drvdata(&bdisp->vdev, bdisp);
1061
1062 bdisp->m2m.vdev = &bdisp->vdev;
1063 bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
1064 if (IS_ERR(bdisp->m2m.m2m_dev)) {
1065 dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
1066 return PTR_ERR(bdisp->m2m.m2m_dev);
1067 }
1068
1069 ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1);
1070 if (ret) {
1071 dev_err(bdisp->dev,
1072 "%s(): failed to register video device\n", __func__);
1073 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1074 return ret;
1075 }
1076
1077 return 0;
1078}
1079
1080static void bdisp_unregister_device(struct bdisp_dev *bdisp)
1081{
1082 if (!bdisp)
1083 return;
1084
1085 if (bdisp->m2m.m2m_dev)
1086 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1087
1088 video_unregister_device(bdisp->m2m.vdev);
1089}
1090
1091static irqreturn_t bdisp_irq_thread(int irq, void *priv)
1092{
1093 struct bdisp_dev *bdisp = priv;
1094 struct bdisp_ctx *ctx;
1095
1096 spin_lock(&bdisp->slock);
1097
1098 bdisp_dbg_perf_end(bdisp);
1099
1100 cancel_delayed_work(&bdisp->timeout_work);
1101
1102 if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
1103 goto isr_unlock;
1104
1105 if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
1106 set_bit(ST_M2M_SUSPENDED, &bdisp->state);
1107 wake_up(&bdisp->irq_queue);
1108 goto isr_unlock;
1109 }
1110
1111 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1112 if (!ctx || !ctx->fh.m2m_ctx)
1113 goto isr_unlock;
1114
1115 spin_unlock(&bdisp->slock);
1116
1117 bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
1118
1119 if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
1120 bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
1121 wake_up(&bdisp->irq_queue);
1122 }
1123
1124 return IRQ_HANDLED;
1125
1126isr_unlock:
1127 spin_unlock(&bdisp->slock);
1128
1129 return IRQ_HANDLED;
1130}
1131
1132static irqreturn_t bdisp_irq_handler(int irq, void *priv)
1133{
1134 if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
1135 return IRQ_NONE;
1136 else
1137 return IRQ_WAKE_THREAD;
1138}
1139
1140static void bdisp_irq_timeout(struct work_struct *ptr)
1141{
1142 struct delayed_work *twork = to_delayed_work(ptr);
1143 struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
1144 timeout_work);
1145 struct bdisp_ctx *ctx;
1146
1147 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1148
1149 dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
1150
1151 spin_lock(&bdisp->slock);
1152 clear_bit(ST_M2M_RUNNING, &bdisp->state);
1153 spin_unlock(&bdisp->slock);
1154
1155 bdisp_hw_reset(bdisp);
1156
1157 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1158}
1159
1160static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
1161{
1162 unsigned long flags;
1163 int timeout;
1164
1165 spin_lock_irqsave(&bdisp->slock, flags);
1166 if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
1167 spin_unlock_irqrestore(&bdisp->slock, flags);
1168 return 0;
1169 }
1170 clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
1171 set_bit(ST_M2M_SUSPENDING, &bdisp->state);
1172 spin_unlock_irqrestore(&bdisp->slock, flags);
1173
1174 timeout = wait_event_timeout(bdisp->irq_queue,
1175 test_bit(ST_M2M_SUSPENDED, &bdisp->state),
1176 BDISP_WORK_TIMEOUT);
1177
1178 clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
1179
1180 if (!timeout) {
1181 dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
1182 return -EAGAIN;
1183 }
1184
1185 return 0;
1186}
1187
1188static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
1189{
1190 struct bdisp_ctx *ctx;
1191 unsigned long flags;
1192
1193 spin_lock_irqsave(&bdisp->slock, flags);
1194 ctx = bdisp->m2m.ctx;
1195 bdisp->m2m.ctx = NULL;
1196 spin_unlock_irqrestore(&bdisp->slock, flags);
1197
1198 if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
1199 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1200
1201 return 0;
1202}
1203
1204static int bdisp_runtime_resume(struct device *dev)
1205{
1206 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1207 int ret = clk_enable(bdisp->clock);
1208
1209 if (ret)
1210 return ret;
1211
1212 return bdisp_m2m_resume(bdisp);
1213}
1214
1215static int bdisp_runtime_suspend(struct device *dev)
1216{
1217 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1218 int ret = bdisp_m2m_suspend(bdisp);
1219
1220 if (!ret)
1221 clk_disable(bdisp->clock);
1222
1223 return ret;
1224}
1225
1226static int bdisp_resume(struct device *dev)
1227{
1228 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1229 unsigned long flags;
1230 int opened;
1231
1232 spin_lock_irqsave(&bdisp->slock, flags);
1233 opened = test_bit(ST_M2M_OPEN, &bdisp->state);
1234 spin_unlock_irqrestore(&bdisp->slock, flags);
1235
1236 if (!opened)
1237 return 0;
1238
1239 if (!pm_runtime_suspended(dev))
1240 return bdisp_runtime_resume(dev);
1241
1242 return 0;
1243}
1244
1245static int bdisp_suspend(struct device *dev)
1246{
1247 if (!pm_runtime_suspended(dev))
1248 return bdisp_runtime_suspend(dev);
1249
1250 return 0;
1251}
1252
1253static const struct dev_pm_ops bdisp_pm_ops = {
1254 .suspend = bdisp_suspend,
1255 .resume = bdisp_resume,
1256 .runtime_suspend = bdisp_runtime_suspend,
1257 .runtime_resume = bdisp_runtime_resume,
1258};
1259
1260static int bdisp_remove(struct platform_device *pdev)
1261{
1262 struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
1263
1264 bdisp_unregister_device(bdisp);
1265
1266 bdisp_hw_free_filters(bdisp->dev);
1267
1268 pm_runtime_disable(&pdev->dev);
1269
1270 bdisp_debugfs_remove(bdisp);
1271
1272 v4l2_device_unregister(&bdisp->v4l2_dev);
1273
1274 if (!IS_ERR(bdisp->clock))
1275 clk_unprepare(bdisp->clock);
1276
1277 destroy_workqueue(bdisp->work_queue);
1278
1279 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1280
1281 return 0;
1282}
1283
1284static int bdisp_probe(struct platform_device *pdev)
1285{
1286 struct bdisp_dev *bdisp;
1287 struct resource *res;
1288 struct device *dev = &pdev->dev;
1289 int ret;
1290
1291 dev_dbg(dev, "%s\n", __func__);
1292
1293 bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
1294 if (!bdisp)
1295 return -ENOMEM;
1296
1297 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
1298 if (ret)
1299 return ret;
1300
1301 bdisp->pdev = pdev;
1302 bdisp->dev = dev;
1303 platform_set_drvdata(pdev, bdisp);
1304
1305 if (dev->of_node)
1306 bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME);
1307 else
1308 bdisp->id = pdev->id;
1309
1310 init_waitqueue_head(&bdisp->irq_queue);
1311 INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout);
1312 bdisp->work_queue = create_workqueue(BDISP_NAME);
1313
1314 spin_lock_init(&bdisp->slock);
1315 mutex_init(&bdisp->lock);
1316
1317
1318 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1319 bdisp->regs = devm_ioremap_resource(dev, res);
1320 if (IS_ERR(bdisp->regs)) {
1321 dev_err(dev, "failed to get regs\n");
1322 ret = PTR_ERR(bdisp->regs);
1323 goto err_wq;
1324 }
1325
1326 bdisp->clock = devm_clk_get(dev, BDISP_NAME);
1327 if (IS_ERR(bdisp->clock)) {
1328 dev_err(dev, "failed to get clock\n");
1329 ret = PTR_ERR(bdisp->clock);
1330 goto err_wq;
1331 }
1332
1333 ret = clk_prepare(bdisp->clock);
1334 if (ret < 0) {
1335 dev_err(dev, "clock prepare failed\n");
1336 bdisp->clock = ERR_PTR(-EINVAL);
1337 goto err_wq;
1338 }
1339
1340 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1341 if (!res) {
1342 dev_err(dev, "failed to get IRQ resource\n");
1343 ret = -EINVAL;
1344 goto err_clk;
1345 }
1346
1347 ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler,
1348 bdisp_irq_thread, IRQF_ONESHOT,
1349 pdev->name, bdisp);
1350 if (ret) {
1351 dev_err(dev, "failed to install irq\n");
1352 goto err_clk;
1353 }
1354
1355
1356 ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
1357 if (ret) {
1358 dev_err(dev, "failed to register\n");
1359 goto err_clk;
1360 }
1361
1362
1363 ret = bdisp_debugfs_create(bdisp);
1364 if (ret) {
1365 dev_err(dev, "failed to create debugfs\n");
1366 goto err_v4l2;
1367 }
1368
1369
1370 pm_runtime_enable(dev);
1371 ret = pm_runtime_get_sync(dev);
1372 if (ret < 0) {
1373 dev_err(dev, "failed to set PM\n");
1374 goto err_dbg;
1375 }
1376
1377
1378 if (bdisp_hw_alloc_filters(bdisp->dev)) {
1379 dev_err(bdisp->dev, "no memory for filters\n");
1380 ret = -ENOMEM;
1381 goto err_pm;
1382 }
1383
1384
1385 ret = bdisp_register_device(bdisp);
1386 if (ret) {
1387 dev_err(dev, "failed to register\n");
1388 goto err_filter;
1389 }
1390
1391 dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
1392 bdisp->id, bdisp->vdev.num);
1393
1394 pm_runtime_put(dev);
1395
1396 return 0;
1397
1398err_filter:
1399 bdisp_hw_free_filters(bdisp->dev);
1400err_pm:
1401 pm_runtime_put(dev);
1402err_dbg:
1403 bdisp_debugfs_remove(bdisp);
1404err_v4l2:
1405 v4l2_device_unregister(&bdisp->v4l2_dev);
1406err_clk:
1407 if (!IS_ERR(bdisp->clock))
1408 clk_unprepare(bdisp->clock);
1409err_wq:
1410 destroy_workqueue(bdisp->work_queue);
1411 return ret;
1412}
1413
1414static const struct of_device_id bdisp_match_types[] = {
1415 {
1416 .compatible = "st,stih407-bdisp",
1417 },
1418 { }
1419};
1420
1421MODULE_DEVICE_TABLE(of, bdisp_match_types);
1422
1423static struct platform_driver bdisp_driver = {
1424 .probe = bdisp_probe,
1425 .remove = bdisp_remove,
1426 .driver = {
1427 .name = BDISP_NAME,
1428 .of_match_table = bdisp_match_types,
1429 .pm = &bdisp_pm_ops,
1430 },
1431};
1432
1433module_platform_driver(bdisp_driver);
1434
1435MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
1436MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
1437MODULE_LICENSE("GPL");
1438
