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path: root/drivers/media/platform/sti/bdisp/bdisp-v4l2.c
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Diffstat (limited to 'drivers/media/platform/sti/bdisp/bdisp-v4l2.c')
-rw-r--r--drivers/media/platform/sti/bdisp/bdisp-v4l2.c1416
1 files changed, 1416 insertions, 0 deletions
diff --git a/drivers/media/platform/sti/bdisp/bdisp-v4l2.c b/drivers/media/platform/sti/bdisp/bdisp-v4l2.c
new file mode 100644
index 000000000000..9e782ebe18da
--- /dev/null
+++ b/drivers/media/platform/sti/bdisp/bdisp-v4l2.c
@@ -0,0 +1,1416 @@
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
38enum 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
45static 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
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_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->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
195 dst_vb->v4l2_buf.timecode = src_vb->v4l2_buf.timecode;
196 dst_vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
197 dst_vb->v4l2_buf.flags |= src_vb->v4l2_buf.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 /* 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
281static int bdisp_get_bufs(struct bdisp_ctx *ctx)
282{
283 struct bdisp_frame *src, *dst;
284 struct vb2_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, 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, dst, dst->paddr);
297 if (ret)
298 return ret;
299
300 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_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 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 const struct v4l2_format *fmt,
442 unsigned int *nb_buf, unsigned int *nb_planes,
443 unsigned int sizes[], void *allocators[])
444{
445 struct bdisp_ctx *ctx = vb2_get_drv_priv(vq);
446 struct bdisp_frame *frame = ctx_get_frame(ctx, vq->type);
447
448 if (IS_ERR(frame)) {
449 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
450 return PTR_ERR(frame);
451 }
452
453 if (!frame->fmt) {
454 dev_err(ctx->bdisp_dev->dev, "Invalid format\n");
455 return -EINVAL;
456 }
457
458 if (fmt && fmt->fmt.pix.sizeimage < frame->sizeimage)
459 return -EINVAL;
460
461 *nb_planes = 1;
462 sizes[0] = fmt ? fmt->fmt.pix.sizeimage : frame->sizeimage;
463 allocators[0] = ctx->bdisp_dev->alloc_ctx;
464
465 return 0;
466}
467
468static int bdisp_buf_prepare(struct vb2_buffer *vb)
469{
470 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
471 struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type);
472
473 if (IS_ERR(frame)) {
474 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
475 return PTR_ERR(frame);
476 }
477
478 if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
479 vb2_set_plane_payload(vb, 0, frame->sizeimage);
480
481 return 0;
482}
483
484static void bdisp_buf_queue(struct vb2_buffer *vb)
485{
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, vb);
497}
498
499static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count)
500{
501 struct bdisp_ctx *ctx = q->drv_priv;
502 struct vb2_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
522static 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
531static 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
541static 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
574static 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
632error_ctrls:
633 bdisp_ctrls_delete(ctx);
634error_fh:
635 v4l2_fh_del(&ctx->fh);
636 v4l2_fh_exit(&ctx->fh);
637 bdisp_hw_free_nodes(ctx);
638mem_ctx:
639 kfree(ctx);
640unlock:
641 mutex_unlock(&bdisp->lock);
642
643 return ret;
644}
645
646static 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
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 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
702static 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
722static 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
746static 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
796static 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
848static 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 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
855 /* Composing / capture is not supported */
856 dev_dbg(ctx->bdisp_dev->dev, "Not supported for capture\n");
857 return -EINVAL;
858 }
859
860 frame = ctx_get_frame(ctx, s->type);
861 if (IS_ERR(frame)) {
862 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
863 return PTR_ERR(frame);
864 }
865
866 switch (s->target) {
867 case V4L2_SEL_TGT_CROP:
868 /* cropped frame */
869 s->r = frame->crop;
870 break;
871 case V4L2_SEL_TGT_CROP_DEFAULT:
872 case V4L2_SEL_TGT_CROP_BOUNDS:
873 /* complete frame */
874 s->r.left = 0;
875 s->r.top = 0;
876 s->r.width = frame->width;
877 s->r.height = frame->height;
878 break;
879 default:
880 dev_dbg(ctx->bdisp_dev->dev, "Invalid target\n");
881 return -EINVAL;
882 }
883
884 return 0;
885}
886
887static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
888{
889 /* Return 1 if a is enclosed in b, or 0 otherwise. */
890
891 if (a->left < b->left || a->top < b->top)
892 return 0;
893
894 if (a->left + a->width > b->left + b->width)
895 return 0;
896
897 if (a->top + a->height > b->top + b->height)
898 return 0;
899
900 return 1;
901}
902
903static int bdisp_s_selection(struct file *file, void *fh,
904 struct v4l2_selection *s)
905{
906 struct bdisp_frame *frame;
907 struct bdisp_ctx *ctx = fh_to_ctx(fh);
908 struct v4l2_rect *in, out;
909
910 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
911 /* Composing / capture is not supported */
912 dev_dbg(ctx->bdisp_dev->dev, "Not supported for capture\n");
913 return -EINVAL;
914 }
915
916 if (s->target != V4L2_SEL_TGT_CROP) {
917 dev_dbg(ctx->bdisp_dev->dev, "Invalid target\n");
918 return -EINVAL;
919 }
920
921 frame = ctx_get_frame(ctx, s->type);
922 if (IS_ERR(frame)) {
923 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
924 return PTR_ERR(frame);
925 }
926
927 in = &s->r;
928 out = *in;
929
930 /* Align and check origin */
931 out.left = ALIGN(in->left, frame->fmt->w_align);
932 out.top = ALIGN(in->top, frame->fmt->h_align);
933
934 if ((out.left < 0) || (out.left >= frame->width) ||
935 (out.top < 0) || (out.top >= frame->height)) {
936 dev_err(ctx->bdisp_dev->dev,
937 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
938 out.width, out.height, out.left, out.top,
939 frame->width, frame->height);
940 return -EINVAL;
941 }
942
943 /* Align and check size */
944 out.width = ALIGN(in->width, frame->fmt->w_align);
945 out.height = ALIGN(in->height, frame->fmt->w_align);
946
947 if (((out.left + out.width) > frame->width) ||
948 ((out.top + out.height) > frame->height)) {
949 dev_err(ctx->bdisp_dev->dev,
950 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
951 out.width, out.height, out.left, out.top,
952 frame->width, frame->height);
953 return -EINVAL;
954 }
955
956 /* Checks adjust constraints flags */
957 if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
958 return -ERANGE;
959
960 if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
961 return -ERANGE;
962
963 if ((out.left != in->left) || (out.top != in->top) ||
964 (out.width != in->width) || (out.height != in->height)) {
965 dev_dbg(ctx->bdisp_dev->dev,
966 "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
967 __func__, in->width, in->height, in->left, in->top,
968 out.width, out.height, out.left, out.top);
969 *in = out;
970 }
971
972 frame->crop = out;
973
974 bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
975
976 return 0;
977}
978
979static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
980{
981 struct bdisp_ctx *ctx = fh_to_ctx(fh);
982
983 if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
984 !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
985 dev_err(ctx->bdisp_dev->dev, "src not defined\n");
986 return -EINVAL;
987 }
988
989 if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
990 !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
991 dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
992 return -EINVAL;
993 }
994
995 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
996}
997
998static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
999 .vidioc_querycap = bdisp_querycap,
1000 .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt,
1001 .vidioc_enum_fmt_vid_out = bdisp_enum_fmt,
1002 .vidioc_g_fmt_vid_cap = bdisp_g_fmt,
1003 .vidioc_g_fmt_vid_out = bdisp_g_fmt,
1004 .vidioc_try_fmt_vid_cap = bdisp_try_fmt,
1005 .vidioc_try_fmt_vid_out = bdisp_try_fmt,
1006 .vidioc_s_fmt_vid_cap = bdisp_s_fmt,
1007 .vidioc_s_fmt_vid_out = bdisp_s_fmt,
1008 .vidioc_g_selection = bdisp_g_selection,
1009 .vidioc_s_selection = bdisp_s_selection,
1010 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
1011 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
1012 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
1013 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
1014 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
1015 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
1016 .vidioc_streamon = bdisp_streamon,
1017 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
1018 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1019 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1020};
1021
1022static int bdisp_register_device(struct bdisp_dev *bdisp)
1023{
1024 int ret;
1025
1026 if (!bdisp)
1027 return -ENODEV;
1028
1029 bdisp->vdev.fops = &bdisp_fops;
1030 bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops;
1031 bdisp->vdev.release = video_device_release_empty;
1032 bdisp->vdev.lock = &bdisp->lock;
1033 bdisp->vdev.vfl_dir = VFL_DIR_M2M;
1034 bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev;
1035 snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
1036 BDISP_NAME, bdisp->id);
1037
1038 video_set_drvdata(&bdisp->vdev, bdisp);
1039
1040 bdisp->m2m.vdev = &bdisp->vdev;
1041 bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
1042 if (IS_ERR(bdisp->m2m.m2m_dev)) {
1043 dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
1044 return PTR_ERR(bdisp->m2m.m2m_dev);
1045 }
1046
1047 ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1);
1048 if (ret) {
1049 dev_err(bdisp->dev,
1050 "%s(): failed to register video device\n", __func__);
1051 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1052 return ret;
1053 }
1054
1055 return 0;
1056}
1057
1058static void bdisp_unregister_device(struct bdisp_dev *bdisp)
1059{
1060 if (!bdisp)
1061 return;
1062
1063 if (bdisp->m2m.m2m_dev)
1064 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1065
1066 video_unregister_device(bdisp->m2m.vdev);
1067}
1068
1069static irqreturn_t bdisp_irq_thread(int irq, void *priv)
1070{
1071 struct bdisp_dev *bdisp = priv;
1072 struct bdisp_ctx *ctx;
1073
1074 spin_lock(&bdisp->slock);
1075
1076 bdisp_dbg_perf_end(bdisp);
1077
1078 cancel_delayed_work(&bdisp->timeout_work);
1079
1080 if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
1081 goto isr_unlock;
1082
1083 if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
1084 set_bit(ST_M2M_SUSPENDED, &bdisp->state);
1085 wake_up(&bdisp->irq_queue);
1086 goto isr_unlock;
1087 }
1088
1089 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1090 if (!ctx || !ctx->fh.m2m_ctx)
1091 goto isr_unlock;
1092
1093 spin_unlock(&bdisp->slock);
1094
1095 bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
1096
1097 if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
1098 bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
1099 wake_up(&bdisp->irq_queue);
1100 }
1101
1102 return IRQ_HANDLED;
1103
1104isr_unlock:
1105 spin_unlock(&bdisp->slock);
1106
1107 return IRQ_HANDLED;
1108}
1109
1110static irqreturn_t bdisp_irq_handler(int irq, void *priv)
1111{
1112 if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
1113 return IRQ_NONE;
1114 else
1115 return IRQ_WAKE_THREAD;
1116}
1117
1118static void bdisp_irq_timeout(struct work_struct *ptr)
1119{
1120 struct delayed_work *twork = to_delayed_work(ptr);
1121 struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
1122 timeout_work);
1123 struct bdisp_ctx *ctx;
1124
1125 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1126
1127 dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
1128
1129 spin_lock(&bdisp->slock);
1130 clear_bit(ST_M2M_RUNNING, &bdisp->state);
1131 spin_unlock(&bdisp->slock);
1132
1133 bdisp_hw_reset(bdisp);
1134
1135 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1136}
1137
1138static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
1139{
1140 unsigned long flags;
1141 int timeout;
1142
1143 spin_lock_irqsave(&bdisp->slock, flags);
1144 if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
1145 spin_unlock_irqrestore(&bdisp->slock, flags);
1146 return 0;
1147 }
1148 clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
1149 set_bit(ST_M2M_SUSPENDING, &bdisp->state);
1150 spin_unlock_irqrestore(&bdisp->slock, flags);
1151
1152 timeout = wait_event_timeout(bdisp->irq_queue,
1153 test_bit(ST_M2M_SUSPENDED, &bdisp->state),
1154 BDISP_WORK_TIMEOUT);
1155
1156 clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
1157
1158 if (!timeout) {
1159 dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
1160 return -EAGAIN;
1161 }
1162
1163 return 0;
1164}
1165
1166static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
1167{
1168 struct bdisp_ctx *ctx;
1169 unsigned long flags;
1170
1171 spin_lock_irqsave(&bdisp->slock, flags);
1172 ctx = bdisp->m2m.ctx;
1173 bdisp->m2m.ctx = NULL;
1174 spin_unlock_irqrestore(&bdisp->slock, flags);
1175
1176 if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
1177 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1178
1179 return 0;
1180}
1181
1182static int bdisp_runtime_resume(struct device *dev)
1183{
1184 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1185 int ret = clk_enable(bdisp->clock);
1186
1187 if (ret)
1188 return ret;
1189
1190 return bdisp_m2m_resume(bdisp);
1191}
1192
1193static int bdisp_runtime_suspend(struct device *dev)
1194{
1195 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1196 int ret = bdisp_m2m_suspend(bdisp);
1197
1198 if (!ret)
1199 clk_disable(bdisp->clock);
1200
1201 return ret;
1202}
1203
1204static int bdisp_resume(struct device *dev)
1205{
1206 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1207 unsigned long flags;
1208 int opened;
1209
1210 spin_lock_irqsave(&bdisp->slock, flags);
1211 opened = test_bit(ST_M2M_OPEN, &bdisp->state);
1212 spin_unlock_irqrestore(&bdisp->slock, flags);
1213
1214 if (!opened)
1215 return 0;
1216
1217 if (!pm_runtime_suspended(dev))
1218 return bdisp_runtime_resume(dev);
1219
1220 return 0;
1221}
1222
1223static int bdisp_suspend(struct device *dev)
1224{
1225 if (!pm_runtime_suspended(dev))
1226 return bdisp_runtime_suspend(dev);
1227
1228 return 0;
1229}
1230
1231static const struct dev_pm_ops bdisp_pm_ops = {
1232 .suspend = bdisp_suspend,
1233 .resume = bdisp_resume,
1234 .runtime_suspend = bdisp_runtime_suspend,
1235 .runtime_resume = bdisp_runtime_resume,
1236};
1237
1238static int bdisp_remove(struct platform_device *pdev)
1239{
1240 struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
1241
1242 bdisp_unregister_device(bdisp);
1243
1244 bdisp_hw_free_filters(bdisp->dev);
1245
1246 vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
1247
1248 pm_runtime_disable(&pdev->dev);
1249
1250 bdisp_debugfs_remove(bdisp);
1251
1252 v4l2_device_unregister(&bdisp->v4l2_dev);
1253
1254 if (!IS_ERR(bdisp->clock))
1255 clk_unprepare(bdisp->clock);
1256
1257 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1258
1259 return 0;
1260}
1261
1262static int bdisp_probe(struct platform_device *pdev)
1263{
1264 struct bdisp_dev *bdisp;
1265 struct resource *res;
1266 struct device *dev = &pdev->dev;
1267 int ret;
1268
1269 dev_dbg(dev, "%s\n", __func__);
1270
1271 bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
1272 if (!bdisp)
1273 return -ENOMEM;
1274
1275 bdisp->pdev = pdev;
1276 bdisp->dev = dev;
1277 platform_set_drvdata(pdev, bdisp);
1278
1279 if (dev->of_node)
1280 bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME);
1281 else
1282 bdisp->id = pdev->id;
1283
1284 init_waitqueue_head(&bdisp->irq_queue);
1285 INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout);
1286 bdisp->work_queue = create_workqueue(BDISP_NAME);
1287
1288 spin_lock_init(&bdisp->slock);
1289 mutex_init(&bdisp->lock);
1290
1291 /* get resources */
1292 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1293 bdisp->regs = devm_ioremap_resource(dev, res);
1294 if (IS_ERR(bdisp->regs)) {
1295 dev_err(dev, "failed to get regs\n");
1296 return PTR_ERR(bdisp->regs);
1297 }
1298
1299 bdisp->clock = devm_clk_get(dev, BDISP_NAME);
1300 if (IS_ERR(bdisp->clock)) {
1301 dev_err(dev, "failed to get clock\n");
1302 return PTR_ERR(bdisp->clock);
1303 }
1304
1305 ret = clk_prepare(bdisp->clock);
1306 if (ret < 0) {
1307 dev_err(dev, "clock prepare failed\n");
1308 bdisp->clock = ERR_PTR(-EINVAL);
1309 return ret;
1310 }
1311
1312 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1313 if (!res) {
1314 dev_err(dev, "failed to get IRQ resource\n");
1315 goto err_clk;
1316 }
1317
1318 ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler,
1319 bdisp_irq_thread, IRQF_ONESHOT,
1320 pdev->name, bdisp);
1321 if (ret) {
1322 dev_err(dev, "failed to install irq\n");
1323 goto err_clk;
1324 }
1325
1326 /* v4l2 register */
1327 ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
1328 if (ret) {
1329 dev_err(dev, "failed to register\n");
1330 goto err_clk;
1331 }
1332
1333 /* Debug */
1334 ret = bdisp_debugfs_create(bdisp);
1335 if (ret) {
1336 dev_err(dev, "failed to create debugfs\n");
1337 goto err_v4l2;
1338 }
1339
1340 /* Power management */
1341 pm_runtime_enable(dev);
1342 ret = pm_runtime_get_sync(dev);
1343 if (ret < 0) {
1344 dev_err(dev, "failed to set PM\n");
1345 goto err_dbg;
1346 }
1347
1348 /* Continuous memory allocator */
1349 bdisp->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1350 if (IS_ERR(bdisp->alloc_ctx)) {
1351 ret = PTR_ERR(bdisp->alloc_ctx);
1352 goto err_pm;
1353 }
1354
1355 /* Filters */
1356 if (bdisp_hw_alloc_filters(bdisp->dev)) {
1357 dev_err(bdisp->dev, "no memory for filters\n");
1358 ret = -ENOMEM;
1359 goto err_vb2_dma;
1360 }
1361
1362 /* Register */
1363 ret = bdisp_register_device(bdisp);
1364 if (ret) {
1365 dev_err(dev, "failed to register\n");
1366 goto err_filter;
1367 }
1368
1369 dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
1370 bdisp->id, bdisp->vdev.num);
1371
1372 pm_runtime_put(dev);
1373
1374 return 0;
1375
1376err_filter:
1377 bdisp_hw_free_filters(bdisp->dev);
1378err_vb2_dma:
1379 vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
1380err_pm:
1381 pm_runtime_put(dev);
1382err_dbg:
1383 bdisp_debugfs_remove(bdisp);
1384err_v4l2:
1385 v4l2_device_unregister(&bdisp->v4l2_dev);
1386err_clk:
1387 if (!IS_ERR(bdisp->clock))
1388 clk_unprepare(bdisp->clock);
1389
1390 return ret;
1391}
1392
1393static const struct of_device_id bdisp_match_types[] = {
1394 {
1395 .compatible = "st,stih407-bdisp",
1396 },
1397 { /* end node */ }
1398};
1399
1400MODULE_DEVICE_TABLE(of, bdisp_match_types);
1401
1402static struct platform_driver bdisp_driver = {
1403 .probe = bdisp_probe,
1404 .remove = bdisp_remove,
1405 .driver = {
1406 .name = BDISP_NAME,
1407 .of_match_table = bdisp_match_types,
1408 .pm = &bdisp_pm_ops,
1409 },
1410};
1411
1412module_platform_driver(bdisp_driver);
1413
1414MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
1415MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
1416MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-09 11:00:24 -0500