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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / platform / sti / bdisp / bdisp-v4l2.c
blobd12a419c044a16a96991a26324a60078b34f3037
1 /*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Authors: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
4 * License terms: GNU General Public License (GPL), version 2
5 */
6
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 /* User configuration change */
25 #define BDISP_PARAMS BIT(0) /* Config updated */
26 #define BDISP_SRC_FMT BIT(1) /* Source set */
27 #define BDISP_DST_FMT BIT(2) /* Destination set */
28 #define BDISP_CTX_STOP_REQ BIT(3) /* Stop request */
29 #define BDISP_CTX_ABORT BIT(4) /* Abort while device run */
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
38 enum bdisp_dev_flags {
39 ST_M2M_OPEN, /* Driver opened */
40 ST_M2M_RUNNING, /* HW device running */
41 ST_M2M_SUSPENDED, /* Driver suspended */
42 ST_M2M_SUSPENDING, /* Driver being suspended */
43 };
44
45 static const struct bdisp_fmt bdisp_formats[] = {
46 /* ARGB888. [31:0] A:R:G:B 8:8:8:8 little endian */
47 {
48 .pixelformat = V4L2_PIX_FMT_ABGR32, /* is actually ARGB */
49 .nb_planes = 1,
50 .bpp = 32,
51 .bpp_plane0 = 32,
52 .w_align = 1,
53 .h_align = 1
54 },
55 /* XRGB888. [31:0] x:R:G:B 8:8:8:8 little endian */
56 {
57 .pixelformat = V4L2_PIX_FMT_XBGR32, /* is actually xRGB */
58 .nb_planes = 1,
59 .bpp = 32,
60 .bpp_plane0 = 32,
61 .w_align = 1,
62 .h_align = 1
63 },
64 /* RGB565. [15:0] R:G:B 5:6:5 little endian */
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 /* NV12. YUV420SP - 1 plane for Y + 1 plane for (CbCr) */
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 /* RGB888. [23:0] B:G:R 8:8:8 little endian */
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 /* YU12. YUV420P - 1 plane for Y + 1 plane for Cb + 1 plane for Cr
92 * To keep as the LAST element of this table (no support on capture)
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 /* Default format : HD ARGB32*/
105 #define BDISP_DEF_WIDTH 1920
106 #define BDISP_DEF_HEIGHT 1080
107
108 static 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
120 static 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
129 static 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
138 static 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
150 static 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
164 static 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
181 static 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
208 static 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
236 static 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
248 static void bdisp_job_abort(void *priv)
249 {
250 __bdisp_job_abort((struct bdisp_ctx *)priv);
251 }
252
253 static 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 /* UV (NV12) or U (420P) */
263 paddr[1] = (dma_addr_t)(paddr[0] +
264 frame->bytesperline * frame->height);
265
266 if (frame->fmt->nb_planes > 2)
267 /* V (420P) */
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
281 static 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
305 static 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);
356 out:
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
363 static struct v4l2_m2m_ops bdisp_m2m_ops = {
364 .device_run = bdisp_device_run,
365 .job_abort = bdisp_job_abort,
366 };
367
368 static 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
390 static 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
404 static const struct v4l2_ctrl_ops bdisp_c_ops = {
405 .s_ctrl = bdisp_s_ctrl,
406 };
407
408 static 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
432 static 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
440 static int bdisp_queue_setup(struct vb2_queue *vq,
441 unsigned int *nb_buf, unsigned int *nb_planes,
442 unsigned int sizes[], void *allocators[])
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 allocators[0] = ctx->bdisp_dev->alloc_ctx;
457
458 if (*nb_planes)
459 return sizes[0] < frame->sizeimage ? -EINVAL : 0;
460
461 *nb_planes = 1;
462 sizes[0] = frame->sizeimage;
463
464 return 0;
465 }
466
467 static int bdisp_buf_prepare(struct vb2_buffer *vb)
468 {
469 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
470 struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type);
471
472 if (IS_ERR(frame)) {
473 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
474 return PTR_ERR(frame);
475 }
476
477 if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
478 vb2_set_plane_payload(vb, 0, frame->sizeimage);
479
480 return 0;
481 }
482
483 static void bdisp_buf_queue(struct vb2_buffer *vb)
484 {
485 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
486 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
487
488 /* return to V4L2 any 0-size buffer so it can be dequeued by user */
489 if (!vb2_get_plane_payload(vb, 0)) {
490 dev_dbg(ctx->bdisp_dev->dev, "0 data buffer, skip it\n");
491 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
492 return;
493 }
494
495 if (ctx->fh.m2m_ctx)
496 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
497 }
498
499 static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count)
500 {
501 struct bdisp_ctx *ctx = q->drv_priv;
502 struct vb2_v4l2_buffer *buf;
503 int ret = pm_runtime_get_sync(ctx->bdisp_dev->dev);
504
505 if (ret < 0) {
506 dev_err(ctx->bdisp_dev->dev, "failed to set runtime PM\n");
507
508 if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
509 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
510 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
511 } else {
512 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
513 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
514 }
515
516 return ret;
517 }
518
519 return 0;
520 }
521
522 static void bdisp_stop_streaming(struct vb2_queue *q)
523 {
524 struct bdisp_ctx *ctx = q->drv_priv;
525
526 __bdisp_job_abort(ctx);
527
528 pm_runtime_put(ctx->bdisp_dev->dev);
529 }
530
531 static struct vb2_ops bdisp_qops = {
532 .queue_setup = bdisp_queue_setup,
533 .buf_prepare = bdisp_buf_prepare,
534 .buf_queue = bdisp_buf_queue,
535 .wait_prepare = vb2_ops_wait_prepare,
536 .wait_finish = vb2_ops_wait_finish,
537 .stop_streaming = bdisp_stop_streaming,
538 .start_streaming = bdisp_start_streaming,
539 };
540
541 static int queue_init(void *priv,
542 struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
543 {
544 struct bdisp_ctx *ctx = priv;
545 int ret;
546
547 memset(src_vq, 0, sizeof(*src_vq));
548 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
549 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
550 src_vq->drv_priv = ctx;
551 src_vq->ops = &bdisp_qops;
552 src_vq->mem_ops = &vb2_dma_contig_memops;
553 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
554 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
555 src_vq->lock = &ctx->bdisp_dev->lock;
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
571 return vb2_queue_init(dst_vq);
572 }
573
574 static int bdisp_open(struct file *file)
575 {
576 struct bdisp_dev *bdisp = video_drvdata(file);
577 struct bdisp_ctx *ctx = NULL;
578 int ret;
579
580 if (mutex_lock_interruptible(&bdisp->lock))
581 return -ERESTARTSYS;
582
583 /* Allocate memory for both context and node */
584 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
585 if (!ctx) {
586 ret = -ENOMEM;
587 goto unlock;
588 }
589 ctx->bdisp_dev = bdisp;
590
591 if (bdisp_hw_alloc_nodes(ctx)) {
592 dev_err(bdisp->dev, "no memory for nodes\n");
593 ret = -ENOMEM;
594 goto mem_ctx;
595 }
596
597 v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev);
598
599 ret = bdisp_ctrls_create(ctx);
600 if (ret) {
601 dev_err(bdisp->dev, "Failed to create control\n");
602 goto error_fh;
603 }
604
605 /* Use separate control handler per file handle */
606 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
607 file->private_data = &ctx->fh;
608 v4l2_fh_add(&ctx->fh);
609
610 /* Default format */
611 ctx->src = bdisp_dflt_fmt;
612 ctx->dst = bdisp_dflt_fmt;
613
614 /* Setup the device context for mem2mem mode. */
615 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx,
616 queue_init);
617 if (IS_ERR(ctx->fh.m2m_ctx)) {
618 dev_err(bdisp->dev, "Failed to initialize m2m context\n");
619 ret = PTR_ERR(ctx->fh.m2m_ctx);
620 goto error_ctrls;
621 }
622
623 bdisp->m2m.refcnt++;
624 set_bit(ST_M2M_OPEN, &bdisp->state);
625
626 dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx);
627
628 mutex_unlock(&bdisp->lock);
629
630 return 0;
631
632 error_ctrls:
633 bdisp_ctrls_delete(ctx);
634 error_fh:
635 v4l2_fh_del(&ctx->fh);
636 v4l2_fh_exit(&ctx->fh);
637 bdisp_hw_free_nodes(ctx);
638 mem_ctx:
639 kfree(ctx);
640 unlock:
641 mutex_unlock(&bdisp->lock);
642
643 return ret;
644 }
645
646 static int bdisp_release(struct file *file)
647 {
648 struct bdisp_ctx *ctx = fh_to_ctx(file->private_data);
649 struct bdisp_dev *bdisp = ctx->bdisp_dev;
650
651 dev_dbg(bdisp->dev, "%s\n", __func__);
652
653 if (mutex_lock_interruptible(&bdisp->lock))
654 return -ERESTARTSYS;
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
675 static 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
684 static 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 strlcpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver));
691 strlcpy(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
695 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
696
697 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
698
699 return 0;
700 }
701
702 static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
703 {
704 struct bdisp_ctx *ctx = fh_to_ctx(fh);
705 const struct bdisp_fmt *fmt;
706
707 if (f->index >= ARRAY_SIZE(bdisp_formats))
708 return -EINVAL;
709
710 fmt = &bdisp_formats[f->index];
711
712 if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) &&
713 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
714 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
715 return -EINVAL;
716 }
717 f->pixelformat = fmt->pixelformat;
718
719 return 0;
720 }
721
722 static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
723 {
724 struct bdisp_ctx *ctx = fh_to_ctx(fh);
725 struct v4l2_pix_format *pix = &f->fmt.pix;
726 struct bdisp_frame *frame = ctx_get_frame(ctx, f->type);
727
728 if (IS_ERR(frame)) {
729 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
730 return PTR_ERR(frame);
731 }
732
733 pix = &f->fmt.pix;
734 pix->width = frame->width;
735 pix->height = frame->height;
736 pix->pixelformat = frame->fmt->pixelformat;
737 pix->field = frame->field;
738 pix->bytesperline = frame->bytesperline;
739 pix->sizeimage = frame->sizeimage;
740 pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
741 frame->colorspace : bdisp_dflt_fmt.colorspace;
742
743 return 0;
744 }
745
746 static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
747 {
748 struct bdisp_ctx *ctx = fh_to_ctx(fh);
749 struct v4l2_pix_format *pix = &f->fmt.pix;
750 const struct bdisp_fmt *format;
751 u32 in_w, in_h;
752
753 format = bdisp_find_fmt(pix->pixelformat);
754 if (!format) {
755 dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
756 pix->pixelformat);
757 return -EINVAL;
758 }
759
760 /* YUV420P only supported for VIDEO_OUTPUT */
761 if ((format->pixelformat == V4L2_PIX_FMT_YUV420) &&
762 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
763 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
764 return -EINVAL;
765 }
766
767 /* Field (interlaced only supported on OUTPUT) */
768 if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
769 (pix->field != V4L2_FIELD_INTERLACED))
770 pix->field = V4L2_FIELD_NONE;
771
772 /* Adjust width & height */
773 in_w = pix->width;
774 in_h = pix->height;
775 v4l_bound_align_image(&pix->width,
776 BDISP_MIN_W, BDISP_MAX_W,
777 ffs(format->w_align) - 1,
778 &pix->height,
779 BDISP_MIN_H, BDISP_MAX_H,
780 ffs(format->h_align) - 1,
781 0);
782 if ((pix->width != in_w) || (pix->height != in_h))
783 dev_dbg(ctx->bdisp_dev->dev,
784 "%s size updated: %dx%d -> %dx%d\n", __func__,
785 in_w, in_h, pix->width, pix->height);
786
787 pix->bytesperline = (pix->width * format->bpp_plane0) / 8;
788 pix->sizeimage = (pix->width * pix->height * format->bpp) / 8;
789
790 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
791 pix->colorspace = bdisp_dflt_fmt.colorspace;
792
793 return 0;
794 }
795
796 static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
797 {
798 struct bdisp_ctx *ctx = fh_to_ctx(fh);
799 struct vb2_queue *vq;
800 struct bdisp_frame *frame;
801 struct v4l2_pix_format *pix;
802 int ret;
803 u32 state;
804
805 ret = bdisp_try_fmt(file, fh, f);
806 if (ret) {
807 dev_err(ctx->bdisp_dev->dev, "Cannot set format\n");
808 return ret;
809 }
810
811 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
812 if (vb2_is_streaming(vq)) {
813 dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type);
814 return -EBUSY;
815 }
816
817 frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
818 &ctx->src : &ctx->dst;
819 pix = &f->fmt.pix;
820 frame->fmt = bdisp_find_fmt(pix->pixelformat);
821 if (!frame->fmt) {
822 dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
823 pix->pixelformat);
824 return -EINVAL;
825 }
826
827 frame->width = pix->width;
828 frame->height = pix->height;
829 frame->bytesperline = pix->bytesperline;
830 frame->sizeimage = pix->sizeimage;
831 frame->field = pix->field;
832 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
833 frame->colorspace = pix->colorspace;
834
835 frame->crop.width = frame->width;
836 frame->crop.height = frame->height;
837 frame->crop.left = 0;
838 frame->crop.top = 0;
839
840 state = BDISP_PARAMS;
841 state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
842 BDISP_DST_FMT : BDISP_SRC_FMT;
843 bdisp_ctx_state_lock_set(state, ctx);
844
845 return 0;
846 }
847
848 static int bdisp_g_selection(struct file *file, void *fh,
849 struct v4l2_selection *s)
850 {
851 struct bdisp_frame *frame;
852 struct bdisp_ctx *ctx = fh_to_ctx(fh);
853
854 frame = ctx_get_frame(ctx, s->type);
855 if (IS_ERR(frame)) {
856 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
857 return PTR_ERR(frame);
858 }
859
860 switch (s->type) {
861 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
862 switch (s->target) {
863 case V4L2_SEL_TGT_CROP:
864 /* cropped frame */
865 s->r = frame->crop;
866 break;
867 case V4L2_SEL_TGT_CROP_DEFAULT:
868 case V4L2_SEL_TGT_CROP_BOUNDS:
869 /* complete frame */
870 s->r.left = 0;
871 s->r.top = 0;
872 s->r.width = frame->width;
873 s->r.height = frame->height;
874 break;
875 default:
876 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
877 return -EINVAL;
878 }
879 break;
880
881 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
882 switch (s->target) {
883 case V4L2_SEL_TGT_COMPOSE:
884 case V4L2_SEL_TGT_COMPOSE_PADDED:
885 /* composed (cropped) frame */
886 s->r = frame->crop;
887 break;
888 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
889 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
890 /* complete frame */
891 s->r.left = 0;
892 s->r.top = 0;
893 s->r.width = frame->width;
894 s->r.height = frame->height;
895 break;
896 default:
897 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
898 return -EINVAL;
899 }
900 break;
901
902 default:
903 dev_err(ctx->bdisp_dev->dev, "Invalid type\n");
904 return -EINVAL;
905 }
906
907 return 0;
908 }
909
910 static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
911 {
912 /* Return 1 if a is enclosed in b, or 0 otherwise. */
913
914 if (a->left < b->left || a->top < b->top)
915 return 0;
916
917 if (a->left + a->width > b->left + b->width)
918 return 0;
919
920 if (a->top + a->height > b->top + b->height)
921 return 0;
922
923 return 1;
924 }
925
926 static int bdisp_s_selection(struct file *file, void *fh,
927 struct v4l2_selection *s)
928 {
929 struct bdisp_frame *frame;
930 struct bdisp_ctx *ctx = fh_to_ctx(fh);
931 struct v4l2_rect *in, out;
932 bool valid = false;
933
934 if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
935 (s->target == V4L2_SEL_TGT_CROP))
936 valid = true;
937
938 if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
939 (s->target == V4L2_SEL_TGT_COMPOSE))
940 valid = true;
941
942 if (!valid) {
943 dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n");
944 return -EINVAL;
945 }
946
947 frame = ctx_get_frame(ctx, s->type);
948 if (IS_ERR(frame)) {
949 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
950 return PTR_ERR(frame);
951 }
952
953 in = &s->r;
954 out = *in;
955
956 /* Align and check origin */
957 out.left = ALIGN(in->left, frame->fmt->w_align);
958 out.top = ALIGN(in->top, frame->fmt->h_align);
959
960 if ((out.left < 0) || (out.left >= frame->width) ||
961 (out.top < 0) || (out.top >= frame->height)) {
962 dev_err(ctx->bdisp_dev->dev,
963 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
964 out.width, out.height, out.left, out.top,
965 frame->width, frame->height);
966 return -EINVAL;
967 }
968
969 /* Align and check size */
970 out.width = ALIGN(in->width, frame->fmt->w_align);
971 out.height = ALIGN(in->height, frame->fmt->w_align);
972
973 if (((out.left + out.width) > frame->width) ||
974 ((out.top + out.height) > frame->height)) {
975 dev_err(ctx->bdisp_dev->dev,
976 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
977 out.width, out.height, out.left, out.top,
978 frame->width, frame->height);
979 return -EINVAL;
980 }
981
982 /* Checks adjust constraints flags */
983 if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
984 return -ERANGE;
985
986 if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
987 return -ERANGE;
988
989 if ((out.left != in->left) || (out.top != in->top) ||
990 (out.width != in->width) || (out.height != in->height)) {
991 dev_dbg(ctx->bdisp_dev->dev,
992 "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
993 __func__, in->width, in->height, in->left, in->top,
994 out.width, out.height, out.left, out.top);
995 *in = out;
996 }
997
998 frame->crop = out;
999
1000 bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
1001
1002 return 0;
1003 }
1004
1005 static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1006 {
1007 struct bdisp_ctx *ctx = fh_to_ctx(fh);
1008
1009 if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
1010 !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
1011 dev_err(ctx->bdisp_dev->dev, "src not defined\n");
1012 return -EINVAL;
1013 }
1014
1015 if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
1016 !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
1017 dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
1018 return -EINVAL;
1019 }
1020
1021 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
1022 }
1023
1024 static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
1025 .vidioc_querycap = bdisp_querycap,
1026 .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt,
1027 .vidioc_enum_fmt_vid_out = bdisp_enum_fmt,
1028 .vidioc_g_fmt_vid_cap = bdisp_g_fmt,
1029 .vidioc_g_fmt_vid_out = bdisp_g_fmt,
1030 .vidioc_try_fmt_vid_cap = bdisp_try_fmt,
1031 .vidioc_try_fmt_vid_out = bdisp_try_fmt,
1032 .vidioc_s_fmt_vid_cap = bdisp_s_fmt,
1033 .vidioc_s_fmt_vid_out = bdisp_s_fmt,
1034 .vidioc_g_selection = bdisp_g_selection,
1035 .vidioc_s_selection = bdisp_s_selection,
1036 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
1037 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
1038 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
1039 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
1040 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
1041 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
1042 .vidioc_streamon = bdisp_streamon,
1043 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
1044 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1045 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1046 };
1047
1048 static int bdisp_register_device(struct bdisp_dev *bdisp)
1049 {
1050 int ret;
1051
1052 if (!bdisp)
1053 return -ENODEV;
1054
1055 bdisp->vdev.fops = &bdisp_fops;
1056 bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops;
1057 bdisp->vdev.release = video_device_release_empty;
1058 bdisp->vdev.lock = &bdisp->lock;
1059 bdisp->vdev.vfl_dir = VFL_DIR_M2M;
1060 bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev;
1061 snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
1062 BDISP_NAME, bdisp->id);
1063
1064 video_set_drvdata(&bdisp->vdev, bdisp);
1065
1066 bdisp->m2m.vdev = &bdisp->vdev;
1067 bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
1068 if (IS_ERR(bdisp->m2m.m2m_dev)) {
1069 dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
1070 return PTR_ERR(bdisp->m2m.m2m_dev);
1071 }
1072
1073 ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1);
1074 if (ret) {
1075 dev_err(bdisp->dev,
1076 "%s(): failed to register video device\n", __func__);
1077 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1078 return ret;
1079 }
1080
1081 return 0;
1082 }
1083
1084 static void bdisp_unregister_device(struct bdisp_dev *bdisp)
1085 {
1086 if (!bdisp)
1087 return;
1088
1089 if (bdisp->m2m.m2m_dev)
1090 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1091
1092 video_unregister_device(bdisp->m2m.vdev);
1093 }
1094
1095 static irqreturn_t bdisp_irq_thread(int irq, void *priv)
1096 {
1097 struct bdisp_dev *bdisp = priv;
1098 struct bdisp_ctx *ctx;
1099
1100 spin_lock(&bdisp->slock);
1101
1102 bdisp_dbg_perf_end(bdisp);
1103
1104 cancel_delayed_work(&bdisp->timeout_work);
1105
1106 if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
1107 goto isr_unlock;
1108
1109 if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
1110 set_bit(ST_M2M_SUSPENDED, &bdisp->state);
1111 wake_up(&bdisp->irq_queue);
1112 goto isr_unlock;
1113 }
1114
1115 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1116 if (!ctx || !ctx->fh.m2m_ctx)
1117 goto isr_unlock;
1118
1119 spin_unlock(&bdisp->slock);
1120
1121 bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
1122
1123 if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
1124 bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
1125 wake_up(&bdisp->irq_queue);
1126 }
1127
1128 return IRQ_HANDLED;
1129
1130 isr_unlock:
1131 spin_unlock(&bdisp->slock);
1132
1133 return IRQ_HANDLED;
1134 }
1135
1136 static irqreturn_t bdisp_irq_handler(int irq, void *priv)
1137 {
1138 if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
1139 return IRQ_NONE;
1140 else
1141 return IRQ_WAKE_THREAD;
1142 }
1143
1144 static void bdisp_irq_timeout(struct work_struct *ptr)
1145 {
1146 struct delayed_work *twork = to_delayed_work(ptr);
1147 struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
1148 timeout_work);
1149 struct bdisp_ctx *ctx;
1150
1151 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1152
1153 dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
1154
1155 spin_lock(&bdisp->slock);
1156 clear_bit(ST_M2M_RUNNING, &bdisp->state);
1157 spin_unlock(&bdisp->slock);
1158
1159 bdisp_hw_reset(bdisp);
1160
1161 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1162 }
1163
1164 static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
1165 {
1166 unsigned long flags;
1167 int timeout;
1168
1169 spin_lock_irqsave(&bdisp->slock, flags);
1170 if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
1171 spin_unlock_irqrestore(&bdisp->slock, flags);
1172 return 0;
1173 }
1174 clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
1175 set_bit(ST_M2M_SUSPENDING, &bdisp->state);
1176 spin_unlock_irqrestore(&bdisp->slock, flags);
1177
1178 timeout = wait_event_timeout(bdisp->irq_queue,
1179 test_bit(ST_M2M_SUSPENDED, &bdisp->state),
1180 BDISP_WORK_TIMEOUT);
1181
1182 clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
1183
1184 if (!timeout) {
1185 dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
1186 return -EAGAIN;
1187 }
1188
1189 return 0;
1190 }
1191
1192 static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
1193 {
1194 struct bdisp_ctx *ctx;
1195 unsigned long flags;
1196
1197 spin_lock_irqsave(&bdisp->slock, flags);
1198 ctx = bdisp->m2m.ctx;
1199 bdisp->m2m.ctx = NULL;
1200 spin_unlock_irqrestore(&bdisp->slock, flags);
1201
1202 if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
1203 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1204
1205 return 0;
1206 }
1207
1208 static int bdisp_runtime_resume(struct device *dev)
1209 {
1210 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1211 int ret = clk_enable(bdisp->clock);
1212
1213 if (ret)
1214 return ret;
1215
1216 return bdisp_m2m_resume(bdisp);
1217 }
1218
1219 static int bdisp_runtime_suspend(struct device *dev)
1220 {
1221 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1222 int ret = bdisp_m2m_suspend(bdisp);
1223
1224 if (!ret)
1225 clk_disable(bdisp->clock);
1226
1227 return ret;
1228 }
1229
1230 static int bdisp_resume(struct device *dev)
1231 {
1232 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1233 unsigned long flags;
1234 int opened;
1235
1236 spin_lock_irqsave(&bdisp->slock, flags);
1237 opened = test_bit(ST_M2M_OPEN, &bdisp->state);
1238 spin_unlock_irqrestore(&bdisp->slock, flags);
1239
1240 if (!opened)
1241 return 0;
1242
1243 if (!pm_runtime_suspended(dev))
1244 return bdisp_runtime_resume(dev);
1245
1246 return 0;
1247 }
1248
1249 static int bdisp_suspend(struct device *dev)
1250 {
1251 if (!pm_runtime_suspended(dev))
1252 return bdisp_runtime_suspend(dev);
1253
1254 return 0;
1255 }
1256
1257 static const struct dev_pm_ops bdisp_pm_ops = {
1258 .suspend = bdisp_suspend,
1259 .resume = bdisp_resume,
1260 .runtime_suspend = bdisp_runtime_suspend,
1261 .runtime_resume = bdisp_runtime_resume,
1262 };
1263
1264 static int bdisp_remove(struct platform_device *pdev)
1265 {
1266 struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
1267
1268 bdisp_unregister_device(bdisp);
1269
1270 bdisp_hw_free_filters(bdisp->dev);
1271
1272 vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
1273
1274 pm_runtime_disable(&pdev->dev);
1275
1276 bdisp_debugfs_remove(bdisp);
1277
1278 v4l2_device_unregister(&bdisp->v4l2_dev);
1279
1280 if (!IS_ERR(bdisp->clock))
1281 clk_unprepare(bdisp->clock);
1282
1283 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1284
1285 return 0;
1286 }
1287
1288 static int bdisp_probe(struct platform_device *pdev)
1289 {
1290 struct bdisp_dev *bdisp;
1291 struct resource *res;
1292 struct device *dev = &pdev->dev;
1293 int ret;
1294
1295 dev_dbg(dev, "%s\n", __func__);
1296
1297 bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
1298 if (!bdisp)
1299 return -ENOMEM;
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 /* get resources */
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 return PTR_ERR(bdisp->regs);
1323 }
1324
1325 bdisp->clock = devm_clk_get(dev, BDISP_NAME);
1326 if (IS_ERR(bdisp->clock)) {
1327 dev_err(dev, "failed to get clock\n");
1328 return PTR_ERR(bdisp->clock);
1329 }
1330
1331 ret = clk_prepare(bdisp->clock);
1332 if (ret < 0) {
1333 dev_err(dev, "clock prepare failed\n");
1334 bdisp->clock = ERR_PTR(-EINVAL);
1335 return ret;
1336 }
1337
1338 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1339 if (!res) {
1340 dev_err(dev, "failed to get IRQ resource\n");
1341 goto err_clk;
1342 }
1343
1344 ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler,
1345 bdisp_irq_thread, IRQF_ONESHOT,
1346 pdev->name, bdisp);
1347 if (ret) {
1348 dev_err(dev, "failed to install irq\n");
1349 goto err_clk;
1350 }
1351
1352 /* v4l2 register */
1353 ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
1354 if (ret) {
1355 dev_err(dev, "failed to register\n");
1356 goto err_clk;
1357 }
1358
1359 /* Debug */
1360 ret = bdisp_debugfs_create(bdisp);
1361 if (ret) {
1362 dev_err(dev, "failed to create debugfs\n");
1363 goto err_v4l2;
1364 }
1365
1366 /* Power management */
1367 pm_runtime_enable(dev);
1368 ret = pm_runtime_get_sync(dev);
1369 if (ret < 0) {
1370 dev_err(dev, "failed to set PM\n");
1371 goto err_dbg;
1372 }
1373
1374 /* Continuous memory allocator */
1375 bdisp->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1376 if (IS_ERR(bdisp->alloc_ctx)) {
1377 ret = PTR_ERR(bdisp->alloc_ctx);
1378 goto err_pm;
1379 }
1380
1381 /* Filters */
1382 if (bdisp_hw_alloc_filters(bdisp->dev)) {
1383 dev_err(bdisp->dev, "no memory for filters\n");
1384 ret = -ENOMEM;
1385 goto err_vb2_dma;
1386 }
1387
1388 /* Register */
1389 ret = bdisp_register_device(bdisp);
1390 if (ret) {
1391 dev_err(dev, "failed to register\n");
1392 goto err_filter;
1393 }
1394
1395 dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
1396 bdisp->id, bdisp->vdev.num);
1397
1398 pm_runtime_put(dev);
1399
1400 return 0;
1401
1402 err_filter:
1403 bdisp_hw_free_filters(bdisp->dev);
1404 err_vb2_dma:
1405 vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
1406 err_pm:
1407 pm_runtime_put(dev);
1408 err_dbg:
1409 bdisp_debugfs_remove(bdisp);
1410 err_v4l2:
1411 v4l2_device_unregister(&bdisp->v4l2_dev);
1412 err_clk:
1413 if (!IS_ERR(bdisp->clock))
1414 clk_unprepare(bdisp->clock);
1415
1416 return ret;
1417 }
1418
1419 static const struct of_device_id bdisp_match_types[] = {
1420 {
1421 .compatible = "st,stih407-bdisp",
1422 },
1423 { /* end node */ }
1424 };
1425
1426 MODULE_DEVICE_TABLE(of, bdisp_match_types);
1427
1428 static struct platform_driver bdisp_driver = {
1429 .probe = bdisp_probe,
1430 .remove = bdisp_remove,
1431 .driver = {
1432 .name = BDISP_NAME,
1433 .of_match_table = bdisp_match_types,
1434 .pm = &bdisp_pm_ops,
1435 },
1436 };
1437
1438 module_platform_driver(bdisp_driver);
1439
1440 MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
1441 MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
1442 MODULE_LICENSE("GPL");
Linux with added FPC-III support