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
bdisp_ctx_state_lock_set(u32 state,struct bdisp_ctx * ctx)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
bdisp_ctx_state_lock_clear(u32 state,struct bdisp_ctx * ctx)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
bdisp_ctx_state_is_set(u32 mask,struct bdisp_ctx * ctx)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
bdisp_find_fmt(u32 pixelformat)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
ctx_get_frame(struct bdisp_ctx * ctx,enum v4l2_buf_type type)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
bdisp_job_finish(struct bdisp_ctx * ctx,int vb_state)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->timestamp = src_vb->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
bdisp_ctx_stop_req(struct bdisp_ctx * ctx)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
__bdisp_job_abort(struct bdisp_ctx * ctx)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
bdisp_job_abort(void * priv)248 static void bdisp_job_abort(void *priv)
249 {
250 __bdisp_job_abort((struct bdisp_ctx *)priv);
251 }
252
bdisp_get_addr(struct bdisp_ctx * ctx,struct vb2_buffer * vb,struct bdisp_frame * frame,dma_addr_t * paddr)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
bdisp_get_bufs(struct bdisp_ctx * ctx)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->timestamp = src_vb->timestamp;
301
302 return 0;
303 }
304
bdisp_device_run(void * priv)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
__bdisp_s_ctrl(struct bdisp_ctx * ctx,struct v4l2_ctrl * ctrl)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
bdisp_s_ctrl(struct v4l2_ctrl * ctrl)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
bdisp_ctrls_create(struct bdisp_ctx * ctx)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
bdisp_ctrls_delete(struct bdisp_ctx * ctx)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
bdisp_queue_setup(struct vb2_queue * vq,const void * parg,unsigned int * nb_buf,unsigned int * nb_planes,unsigned int sizes[],void * allocators[])440 static int bdisp_queue_setup(struct vb2_queue *vq,
441 const void *parg,
442 unsigned int *nb_buf, unsigned int *nb_planes,
443 unsigned int sizes[], void *allocators[])
444 {
445 const struct v4l2_format *fmt = parg;
446 struct bdisp_ctx *ctx = vb2_get_drv_priv(vq);
447 struct bdisp_frame *frame = ctx_get_frame(ctx, vq->type);
448
449 if (IS_ERR(frame)) {
450 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
451 return PTR_ERR(frame);
452 }
453
454 if (!frame->fmt) {
455 dev_err(ctx->bdisp_dev->dev, "Invalid format\n");
456 return -EINVAL;
457 }
458
459 if (fmt && fmt->fmt.pix.sizeimage < frame->sizeimage)
460 return -EINVAL;
461
462 *nb_planes = 1;
463 sizes[0] = fmt ? fmt->fmt.pix.sizeimage : frame->sizeimage;
464 allocators[0] = ctx->bdisp_dev->alloc_ctx;
465
466 return 0;
467 }
468
bdisp_buf_prepare(struct vb2_buffer * vb)469 static int bdisp_buf_prepare(struct vb2_buffer *vb)
470 {
471 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
472 struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type);
473
474 if (IS_ERR(frame)) {
475 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
476 return PTR_ERR(frame);
477 }
478
479 if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
480 vb2_set_plane_payload(vb, 0, frame->sizeimage);
481
482 return 0;
483 }
484
bdisp_buf_queue(struct vb2_buffer * vb)485 static void bdisp_buf_queue(struct vb2_buffer *vb)
486 {
487 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
488 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
489
490 /* return to V4L2 any 0-size buffer so it can be dequeued by user */
491 if (!vb2_get_plane_payload(vb, 0)) {
492 dev_dbg(ctx->bdisp_dev->dev, "0 data buffer, skip it\n");
493 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
494 return;
495 }
496
497 if (ctx->fh.m2m_ctx)
498 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
499 }
500
bdisp_start_streaming(struct vb2_queue * q,unsigned int count)501 static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count)
502 {
503 struct bdisp_ctx *ctx = q->drv_priv;
504 struct vb2_v4l2_buffer *buf;
505 int ret = pm_runtime_get_sync(ctx->bdisp_dev->dev);
506
507 if (ret < 0) {
508 dev_err(ctx->bdisp_dev->dev, "failed to set runtime PM\n");
509
510 if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
511 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
512 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
513 } else {
514 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
515 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
516 }
517
518 return ret;
519 }
520
521 return 0;
522 }
523
bdisp_stop_streaming(struct vb2_queue * q)524 static void bdisp_stop_streaming(struct vb2_queue *q)
525 {
526 struct bdisp_ctx *ctx = q->drv_priv;
527
528 __bdisp_job_abort(ctx);
529
530 pm_runtime_put(ctx->bdisp_dev->dev);
531 }
532
533 static struct vb2_ops bdisp_qops = {
534 .queue_setup = bdisp_queue_setup,
535 .buf_prepare = bdisp_buf_prepare,
536 .buf_queue = bdisp_buf_queue,
537 .wait_prepare = vb2_ops_wait_prepare,
538 .wait_finish = vb2_ops_wait_finish,
539 .stop_streaming = bdisp_stop_streaming,
540 .start_streaming = bdisp_start_streaming,
541 };
542
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)543 static int queue_init(void *priv,
544 struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
545 {
546 struct bdisp_ctx *ctx = priv;
547 int ret;
548
549 memset(src_vq, 0, sizeof(*src_vq));
550 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
551 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
552 src_vq->drv_priv = ctx;
553 src_vq->ops = &bdisp_qops;
554 src_vq->mem_ops = &vb2_dma_contig_memops;
555 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
556 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
557 src_vq->lock = &ctx->bdisp_dev->lock;
558
559 ret = vb2_queue_init(src_vq);
560 if (ret)
561 return ret;
562
563 memset(dst_vq, 0, sizeof(*dst_vq));
564 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
565 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
566 dst_vq->drv_priv = ctx;
567 dst_vq->ops = &bdisp_qops;
568 dst_vq->mem_ops = &vb2_dma_contig_memops;
569 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
570 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
571 dst_vq->lock = &ctx->bdisp_dev->lock;
572
573 return vb2_queue_init(dst_vq);
574 }
575
bdisp_open(struct file * file)576 static int bdisp_open(struct file *file)
577 {
578 struct bdisp_dev *bdisp = video_drvdata(file);
579 struct bdisp_ctx *ctx = NULL;
580 int ret;
581
582 if (mutex_lock_interruptible(&bdisp->lock))
583 return -ERESTARTSYS;
584
585 /* Allocate memory for both context and node */
586 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
587 if (!ctx) {
588 ret = -ENOMEM;
589 goto unlock;
590 }
591 ctx->bdisp_dev = bdisp;
592
593 if (bdisp_hw_alloc_nodes(ctx)) {
594 dev_err(bdisp->dev, "no memory for nodes\n");
595 ret = -ENOMEM;
596 goto mem_ctx;
597 }
598
599 v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev);
600
601 ret = bdisp_ctrls_create(ctx);
602 if (ret) {
603 dev_err(bdisp->dev, "Failed to create control\n");
604 goto error_fh;
605 }
606
607 /* Use separate control handler per file handle */
608 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
609 file->private_data = &ctx->fh;
610 v4l2_fh_add(&ctx->fh);
611
612 /* Default format */
613 ctx->src = bdisp_dflt_fmt;
614 ctx->dst = bdisp_dflt_fmt;
615
616 /* Setup the device context for mem2mem mode. */
617 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx,
618 queue_init);
619 if (IS_ERR(ctx->fh.m2m_ctx)) {
620 dev_err(bdisp->dev, "Failed to initialize m2m context\n");
621 ret = PTR_ERR(ctx->fh.m2m_ctx);
622 goto error_ctrls;
623 }
624
625 bdisp->m2m.refcnt++;
626 set_bit(ST_M2M_OPEN, &bdisp->state);
627
628 dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx);
629
630 mutex_unlock(&bdisp->lock);
631
632 return 0;
633
634 error_ctrls:
635 bdisp_ctrls_delete(ctx);
636 error_fh:
637 v4l2_fh_del(&ctx->fh);
638 v4l2_fh_exit(&ctx->fh);
639 bdisp_hw_free_nodes(ctx);
640 mem_ctx:
641 kfree(ctx);
642 unlock:
643 mutex_unlock(&bdisp->lock);
644
645 return ret;
646 }
647
bdisp_release(struct file * file)648 static int bdisp_release(struct file *file)
649 {
650 struct bdisp_ctx *ctx = fh_to_ctx(file->private_data);
651 struct bdisp_dev *bdisp = ctx->bdisp_dev;
652
653 dev_dbg(bdisp->dev, "%s\n", __func__);
654
655 if (mutex_lock_interruptible(&bdisp->lock))
656 return -ERESTARTSYS;
657
658 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
659
660 bdisp_ctrls_delete(ctx);
661
662 v4l2_fh_del(&ctx->fh);
663 v4l2_fh_exit(&ctx->fh);
664
665 if (--bdisp->m2m.refcnt <= 0)
666 clear_bit(ST_M2M_OPEN, &bdisp->state);
667
668 bdisp_hw_free_nodes(ctx);
669
670 kfree(ctx);
671
672 mutex_unlock(&bdisp->lock);
673
674 return 0;
675 }
676
677 static const struct v4l2_file_operations bdisp_fops = {
678 .owner = THIS_MODULE,
679 .open = bdisp_open,
680 .release = bdisp_release,
681 .poll = v4l2_m2m_fop_poll,
682 .unlocked_ioctl = video_ioctl2,
683 .mmap = v4l2_m2m_fop_mmap,
684 };
685
bdisp_querycap(struct file * file,void * fh,struct v4l2_capability * cap)686 static int bdisp_querycap(struct file *file, void *fh,
687 struct v4l2_capability *cap)
688 {
689 struct bdisp_ctx *ctx = fh_to_ctx(fh);
690 struct bdisp_dev *bdisp = ctx->bdisp_dev;
691
692 strlcpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver));
693 strlcpy(cap->card, bdisp->pdev->name, sizeof(cap->card));
694 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s%d",
695 BDISP_NAME, bdisp->id);
696
697 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
698
699 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
700
701 return 0;
702 }
703
bdisp_enum_fmt(struct file * file,void * fh,struct v4l2_fmtdesc * f)704 static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
705 {
706 struct bdisp_ctx *ctx = fh_to_ctx(fh);
707 const struct bdisp_fmt *fmt;
708
709 if (f->index >= ARRAY_SIZE(bdisp_formats))
710 return -EINVAL;
711
712 fmt = &bdisp_formats[f->index];
713
714 if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) &&
715 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
716 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
717 return -EINVAL;
718 }
719 f->pixelformat = fmt->pixelformat;
720
721 return 0;
722 }
723
bdisp_g_fmt(struct file * file,void * fh,struct v4l2_format * f)724 static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
725 {
726 struct bdisp_ctx *ctx = fh_to_ctx(fh);
727 struct v4l2_pix_format *pix = &f->fmt.pix;
728 struct bdisp_frame *frame = ctx_get_frame(ctx, f->type);
729
730 if (IS_ERR(frame)) {
731 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
732 return PTR_ERR(frame);
733 }
734
735 pix = &f->fmt.pix;
736 pix->width = frame->width;
737 pix->height = frame->height;
738 pix->pixelformat = frame->fmt->pixelformat;
739 pix->field = frame->field;
740 pix->bytesperline = frame->bytesperline;
741 pix->sizeimage = frame->sizeimage;
742 pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
743 frame->colorspace : bdisp_dflt_fmt.colorspace;
744
745 return 0;
746 }
747
bdisp_try_fmt(struct file * file,void * fh,struct v4l2_format * f)748 static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
749 {
750 struct bdisp_ctx *ctx = fh_to_ctx(fh);
751 struct v4l2_pix_format *pix = &f->fmt.pix;
752 const struct bdisp_fmt *format;
753 u32 in_w, in_h;
754
755 format = bdisp_find_fmt(pix->pixelformat);
756 if (!format) {
757 dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
758 pix->pixelformat);
759 return -EINVAL;
760 }
761
762 /* YUV420P only supported for VIDEO_OUTPUT */
763 if ((format->pixelformat == V4L2_PIX_FMT_YUV420) &&
764 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
765 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
766 return -EINVAL;
767 }
768
769 /* Field (interlaced only supported on OUTPUT) */
770 if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
771 (pix->field != V4L2_FIELD_INTERLACED))
772 pix->field = V4L2_FIELD_NONE;
773
774 /* Adjust width & height */
775 in_w = pix->width;
776 in_h = pix->height;
777 v4l_bound_align_image(&pix->width,
778 BDISP_MIN_W, BDISP_MAX_W,
779 ffs(format->w_align) - 1,
780 &pix->height,
781 BDISP_MIN_H, BDISP_MAX_H,
782 ffs(format->h_align) - 1,
783 0);
784 if ((pix->width != in_w) || (pix->height != in_h))
785 dev_dbg(ctx->bdisp_dev->dev,
786 "%s size updated: %dx%d -> %dx%d\n", __func__,
787 in_w, in_h, pix->width, pix->height);
788
789 pix->bytesperline = (pix->width * format->bpp_plane0) / 8;
790 pix->sizeimage = (pix->width * pix->height * format->bpp) / 8;
791
792 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
793 pix->colorspace = bdisp_dflt_fmt.colorspace;
794
795 return 0;
796 }
797
bdisp_s_fmt(struct file * file,void * fh,struct v4l2_format * f)798 static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
799 {
800 struct bdisp_ctx *ctx = fh_to_ctx(fh);
801 struct vb2_queue *vq;
802 struct bdisp_frame *frame;
803 struct v4l2_pix_format *pix;
804 int ret;
805 u32 state;
806
807 ret = bdisp_try_fmt(file, fh, f);
808 if (ret) {
809 dev_err(ctx->bdisp_dev->dev, "Cannot set format\n");
810 return ret;
811 }
812
813 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
814 if (vb2_is_streaming(vq)) {
815 dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type);
816 return -EBUSY;
817 }
818
819 frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
820 &ctx->src : &ctx->dst;
821 pix = &f->fmt.pix;
822 frame->fmt = bdisp_find_fmt(pix->pixelformat);
823 if (!frame->fmt) {
824 dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
825 pix->pixelformat);
826 return -EINVAL;
827 }
828
829 frame->width = pix->width;
830 frame->height = pix->height;
831 frame->bytesperline = pix->bytesperline;
832 frame->sizeimage = pix->sizeimage;
833 frame->field = pix->field;
834 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
835 frame->colorspace = pix->colorspace;
836
837 frame->crop.width = frame->width;
838 frame->crop.height = frame->height;
839 frame->crop.left = 0;
840 frame->crop.top = 0;
841
842 state = BDISP_PARAMS;
843 state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
844 BDISP_DST_FMT : BDISP_SRC_FMT;
845 bdisp_ctx_state_lock_set(state, ctx);
846
847 return 0;
848 }
849
bdisp_g_selection(struct file * file,void * fh,struct v4l2_selection * s)850 static int bdisp_g_selection(struct file *file, void *fh,
851 struct v4l2_selection *s)
852 {
853 struct bdisp_frame *frame;
854 struct bdisp_ctx *ctx = fh_to_ctx(fh);
855
856 frame = ctx_get_frame(ctx, s->type);
857 if (IS_ERR(frame)) {
858 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
859 return PTR_ERR(frame);
860 }
861
862 switch (s->type) {
863 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
864 switch (s->target) {
865 case V4L2_SEL_TGT_CROP:
866 /* cropped frame */
867 s->r = frame->crop;
868 break;
869 case V4L2_SEL_TGT_CROP_DEFAULT:
870 case V4L2_SEL_TGT_CROP_BOUNDS:
871 /* complete frame */
872 s->r.left = 0;
873 s->r.top = 0;
874 s->r.width = frame->width;
875 s->r.height = frame->height;
876 break;
877 default:
878 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
879 return -EINVAL;
880 }
881 break;
882
883 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
884 switch (s->target) {
885 case V4L2_SEL_TGT_COMPOSE:
886 case V4L2_SEL_TGT_COMPOSE_PADDED:
887 /* composed (cropped) frame */
888 s->r = frame->crop;
889 break;
890 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
891 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
892 /* complete frame */
893 s->r.left = 0;
894 s->r.top = 0;
895 s->r.width = frame->width;
896 s->r.height = frame->height;
897 break;
898 default:
899 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
900 return -EINVAL;
901 }
902 break;
903
904 default:
905 dev_err(ctx->bdisp_dev->dev, "Invalid type\n");
906 return -EINVAL;
907 }
908
909 return 0;
910 }
911
is_rect_enclosed(struct v4l2_rect * a,struct v4l2_rect * b)912 static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
913 {
914 /* Return 1 if a is enclosed in b, or 0 otherwise. */
915
916 if (a->left < b->left || a->top < b->top)
917 return 0;
918
919 if (a->left + a->width > b->left + b->width)
920 return 0;
921
922 if (a->top + a->height > b->top + b->height)
923 return 0;
924
925 return 1;
926 }
927
bdisp_s_selection(struct file * file,void * fh,struct v4l2_selection * s)928 static int bdisp_s_selection(struct file *file, void *fh,
929 struct v4l2_selection *s)
930 {
931 struct bdisp_frame *frame;
932 struct bdisp_ctx *ctx = fh_to_ctx(fh);
933 struct v4l2_rect *in, out;
934 bool valid = false;
935
936 if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
937 (s->target == V4L2_SEL_TGT_CROP))
938 valid = true;
939
940 if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
941 (s->target == V4L2_SEL_TGT_COMPOSE))
942 valid = true;
943
944 if (!valid) {
945 dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n");
946 return -EINVAL;
947 }
948
949 frame = ctx_get_frame(ctx, s->type);
950 if (IS_ERR(frame)) {
951 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
952 return PTR_ERR(frame);
953 }
954
955 in = &s->r;
956 out = *in;
957
958 /* Align and check origin */
959 out.left = ALIGN(in->left, frame->fmt->w_align);
960 out.top = ALIGN(in->top, frame->fmt->h_align);
961
962 if ((out.left < 0) || (out.left >= frame->width) ||
963 (out.top < 0) || (out.top >= frame->height)) {
964 dev_err(ctx->bdisp_dev->dev,
965 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
966 out.width, out.height, out.left, out.top,
967 frame->width, frame->height);
968 return -EINVAL;
969 }
970
971 /* Align and check size */
972 out.width = ALIGN(in->width, frame->fmt->w_align);
973 out.height = ALIGN(in->height, frame->fmt->w_align);
974
975 if (((out.left + out.width) > frame->width) ||
976 ((out.top + out.height) > frame->height)) {
977 dev_err(ctx->bdisp_dev->dev,
978 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
979 out.width, out.height, out.left, out.top,
980 frame->width, frame->height);
981 return -EINVAL;
982 }
983
984 /* Checks adjust constraints flags */
985 if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
986 return -ERANGE;
987
988 if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
989 return -ERANGE;
990
991 if ((out.left != in->left) || (out.top != in->top) ||
992 (out.width != in->width) || (out.height != in->height)) {
993 dev_dbg(ctx->bdisp_dev->dev,
994 "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
995 __func__, in->width, in->height, in->left, in->top,
996 out.width, out.height, out.left, out.top);
997 *in = out;
998 }
999
1000 frame->crop = out;
1001
1002 bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
1003
1004 return 0;
1005 }
1006
bdisp_streamon(struct file * file,void * fh,enum v4l2_buf_type type)1007 static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1008 {
1009 struct bdisp_ctx *ctx = fh_to_ctx(fh);
1010
1011 if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
1012 !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
1013 dev_err(ctx->bdisp_dev->dev, "src not defined\n");
1014 return -EINVAL;
1015 }
1016
1017 if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
1018 !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
1019 dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
1020 return -EINVAL;
1021 }
1022
1023 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
1024 }
1025
1026 static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
1027 .vidioc_querycap = bdisp_querycap,
1028 .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt,
1029 .vidioc_enum_fmt_vid_out = bdisp_enum_fmt,
1030 .vidioc_g_fmt_vid_cap = bdisp_g_fmt,
1031 .vidioc_g_fmt_vid_out = bdisp_g_fmt,
1032 .vidioc_try_fmt_vid_cap = bdisp_try_fmt,
1033 .vidioc_try_fmt_vid_out = bdisp_try_fmt,
1034 .vidioc_s_fmt_vid_cap = bdisp_s_fmt,
1035 .vidioc_s_fmt_vid_out = bdisp_s_fmt,
1036 .vidioc_g_selection = bdisp_g_selection,
1037 .vidioc_s_selection = bdisp_s_selection,
1038 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
1039 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
1040 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
1041 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
1042 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
1043 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
1044 .vidioc_streamon = bdisp_streamon,
1045 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
1046 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1047 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1048 };
1049
bdisp_register_device(struct bdisp_dev * bdisp)1050 static int bdisp_register_device(struct bdisp_dev *bdisp)
1051 {
1052 int ret;
1053
1054 if (!bdisp)
1055 return -ENODEV;
1056
1057 bdisp->vdev.fops = &bdisp_fops;
1058 bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops;
1059 bdisp->vdev.release = video_device_release_empty;
1060 bdisp->vdev.lock = &bdisp->lock;
1061 bdisp->vdev.vfl_dir = VFL_DIR_M2M;
1062 bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev;
1063 snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
1064 BDISP_NAME, bdisp->id);
1065
1066 video_set_drvdata(&bdisp->vdev, bdisp);
1067
1068 bdisp->m2m.vdev = &bdisp->vdev;
1069 bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
1070 if (IS_ERR(bdisp->m2m.m2m_dev)) {
1071 dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
1072 return PTR_ERR(bdisp->m2m.m2m_dev);
1073 }
1074
1075 ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1);
1076 if (ret) {
1077 dev_err(bdisp->dev,
1078 "%s(): failed to register video device\n", __func__);
1079 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1080 return ret;
1081 }
1082
1083 return 0;
1084 }
1085
bdisp_unregister_device(struct bdisp_dev * bdisp)1086 static void bdisp_unregister_device(struct bdisp_dev *bdisp)
1087 {
1088 if (!bdisp)
1089 return;
1090
1091 if (bdisp->m2m.m2m_dev)
1092 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1093
1094 video_unregister_device(bdisp->m2m.vdev);
1095 }
1096
bdisp_irq_thread(int irq,void * priv)1097 static irqreturn_t bdisp_irq_thread(int irq, void *priv)
1098 {
1099 struct bdisp_dev *bdisp = priv;
1100 struct bdisp_ctx *ctx;
1101
1102 spin_lock(&bdisp->slock);
1103
1104 bdisp_dbg_perf_end(bdisp);
1105
1106 cancel_delayed_work(&bdisp->timeout_work);
1107
1108 if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
1109 goto isr_unlock;
1110
1111 if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
1112 set_bit(ST_M2M_SUSPENDED, &bdisp->state);
1113 wake_up(&bdisp->irq_queue);
1114 goto isr_unlock;
1115 }
1116
1117 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1118 if (!ctx || !ctx->fh.m2m_ctx)
1119 goto isr_unlock;
1120
1121 spin_unlock(&bdisp->slock);
1122
1123 bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
1124
1125 if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
1126 bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
1127 wake_up(&bdisp->irq_queue);
1128 }
1129
1130 return IRQ_HANDLED;
1131
1132 isr_unlock:
1133 spin_unlock(&bdisp->slock);
1134
1135 return IRQ_HANDLED;
1136 }
1137
bdisp_irq_handler(int irq,void * priv)1138 static irqreturn_t bdisp_irq_handler(int irq, void *priv)
1139 {
1140 if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
1141 return IRQ_NONE;
1142 else
1143 return IRQ_WAKE_THREAD;
1144 }
1145
bdisp_irq_timeout(struct work_struct * ptr)1146 static void bdisp_irq_timeout(struct work_struct *ptr)
1147 {
1148 struct delayed_work *twork = to_delayed_work(ptr);
1149 struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
1150 timeout_work);
1151 struct bdisp_ctx *ctx;
1152
1153 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1154
1155 dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
1156
1157 spin_lock(&bdisp->slock);
1158 clear_bit(ST_M2M_RUNNING, &bdisp->state);
1159 spin_unlock(&bdisp->slock);
1160
1161 bdisp_hw_reset(bdisp);
1162
1163 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1164 }
1165
bdisp_m2m_suspend(struct bdisp_dev * bdisp)1166 static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
1167 {
1168 unsigned long flags;
1169 int timeout;
1170
1171 spin_lock_irqsave(&bdisp->slock, flags);
1172 if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
1173 spin_unlock_irqrestore(&bdisp->slock, flags);
1174 return 0;
1175 }
1176 clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
1177 set_bit(ST_M2M_SUSPENDING, &bdisp->state);
1178 spin_unlock_irqrestore(&bdisp->slock, flags);
1179
1180 timeout = wait_event_timeout(bdisp->irq_queue,
1181 test_bit(ST_M2M_SUSPENDED, &bdisp->state),
1182 BDISP_WORK_TIMEOUT);
1183
1184 clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
1185
1186 if (!timeout) {
1187 dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
1188 return -EAGAIN;
1189 }
1190
1191 return 0;
1192 }
1193
bdisp_m2m_resume(struct bdisp_dev * bdisp)1194 static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
1195 {
1196 struct bdisp_ctx *ctx;
1197 unsigned long flags;
1198
1199 spin_lock_irqsave(&bdisp->slock, flags);
1200 ctx = bdisp->m2m.ctx;
1201 bdisp->m2m.ctx = NULL;
1202 spin_unlock_irqrestore(&bdisp->slock, flags);
1203
1204 if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
1205 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1206
1207 return 0;
1208 }
1209
bdisp_runtime_resume(struct device * dev)1210 static int bdisp_runtime_resume(struct device *dev)
1211 {
1212 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1213 int ret = clk_enable(bdisp->clock);
1214
1215 if (ret)
1216 return ret;
1217
1218 return bdisp_m2m_resume(bdisp);
1219 }
1220
bdisp_runtime_suspend(struct device * dev)1221 static int bdisp_runtime_suspend(struct device *dev)
1222 {
1223 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1224 int ret = bdisp_m2m_suspend(bdisp);
1225
1226 if (!ret)
1227 clk_disable(bdisp->clock);
1228
1229 return ret;
1230 }
1231
bdisp_resume(struct device * dev)1232 static int bdisp_resume(struct device *dev)
1233 {
1234 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1235 unsigned long flags;
1236 int opened;
1237
1238 spin_lock_irqsave(&bdisp->slock, flags);
1239 opened = test_bit(ST_M2M_OPEN, &bdisp->state);
1240 spin_unlock_irqrestore(&bdisp->slock, flags);
1241
1242 if (!opened)
1243 return 0;
1244
1245 if (!pm_runtime_suspended(dev))
1246 return bdisp_runtime_resume(dev);
1247
1248 return 0;
1249 }
1250
bdisp_suspend(struct device * dev)1251 static int bdisp_suspend(struct device *dev)
1252 {
1253 if (!pm_runtime_suspended(dev))
1254 return bdisp_runtime_suspend(dev);
1255
1256 return 0;
1257 }
1258
1259 static const struct dev_pm_ops bdisp_pm_ops = {
1260 .suspend = bdisp_suspend,
1261 .resume = bdisp_resume,
1262 .runtime_suspend = bdisp_runtime_suspend,
1263 .runtime_resume = bdisp_runtime_resume,
1264 };
1265
bdisp_remove(struct platform_device * pdev)1266 static int bdisp_remove(struct platform_device *pdev)
1267 {
1268 struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
1269
1270 bdisp_unregister_device(bdisp);
1271
1272 bdisp_hw_free_filters(bdisp->dev);
1273
1274 vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
1275
1276 pm_runtime_disable(&pdev->dev);
1277
1278 bdisp_debugfs_remove(bdisp);
1279
1280 v4l2_device_unregister(&bdisp->v4l2_dev);
1281
1282 if (!IS_ERR(bdisp->clock))
1283 clk_unprepare(bdisp->clock);
1284
1285 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1286
1287 return 0;
1288 }
1289
bdisp_probe(struct platform_device * pdev)1290 static int bdisp_probe(struct platform_device *pdev)
1291 {
1292 struct bdisp_dev *bdisp;
1293 struct resource *res;
1294 struct device *dev = &pdev->dev;
1295 int ret;
1296
1297 dev_dbg(dev, "%s\n", __func__);
1298
1299 bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
1300 if (!bdisp)
1301 return -ENOMEM;
1302
1303 bdisp->pdev = pdev;
1304 bdisp->dev = dev;
1305 platform_set_drvdata(pdev, bdisp);
1306
1307 if (dev->of_node)
1308 bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME);
1309 else
1310 bdisp->id = pdev->id;
1311
1312 init_waitqueue_head(&bdisp->irq_queue);
1313 INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout);
1314 bdisp->work_queue = create_workqueue(BDISP_NAME);
1315
1316 spin_lock_init(&bdisp->slock);
1317 mutex_init(&bdisp->lock);
1318
1319 /* get resources */
1320 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1321 bdisp->regs = devm_ioremap_resource(dev, res);
1322 if (IS_ERR(bdisp->regs)) {
1323 dev_err(dev, "failed to get regs\n");
1324 return PTR_ERR(bdisp->regs);
1325 }
1326
1327 bdisp->clock = devm_clk_get(dev, BDISP_NAME);
1328 if (IS_ERR(bdisp->clock)) {
1329 dev_err(dev, "failed to get clock\n");
1330 return PTR_ERR(bdisp->clock);
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 return ret;
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 goto err_clk;
1344 }
1345
1346 ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler,
1347 bdisp_irq_thread, IRQF_ONESHOT,
1348 pdev->name, bdisp);
1349 if (ret) {
1350 dev_err(dev, "failed to install irq\n");
1351 goto err_clk;
1352 }
1353
1354 /* v4l2 register */
1355 ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
1356 if (ret) {
1357 dev_err(dev, "failed to register\n");
1358 goto err_clk;
1359 }
1360
1361 /* Debug */
1362 ret = bdisp_debugfs_create(bdisp);
1363 if (ret) {
1364 dev_err(dev, "failed to create debugfs\n");
1365 goto err_v4l2;
1366 }
1367
1368 /* Power management */
1369 pm_runtime_enable(dev);
1370 ret = pm_runtime_get_sync(dev);
1371 if (ret < 0) {
1372 dev_err(dev, "failed to set PM\n");
1373 goto err_dbg;
1374 }
1375
1376 /* Continuous memory allocator */
1377 bdisp->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1378 if (IS_ERR(bdisp->alloc_ctx)) {
1379 ret = PTR_ERR(bdisp->alloc_ctx);
1380 goto err_pm;
1381 }
1382
1383 /* Filters */
1384 if (bdisp_hw_alloc_filters(bdisp->dev)) {
1385 dev_err(bdisp->dev, "no memory for filters\n");
1386 ret = -ENOMEM;
1387 goto err_vb2_dma;
1388 }
1389
1390 /* Register */
1391 ret = bdisp_register_device(bdisp);
1392 if (ret) {
1393 dev_err(dev, "failed to register\n");
1394 goto err_filter;
1395 }
1396
1397 dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
1398 bdisp->id, bdisp->vdev.num);
1399
1400 pm_runtime_put(dev);
1401
1402 return 0;
1403
1404 err_filter:
1405 bdisp_hw_free_filters(bdisp->dev);
1406 err_vb2_dma:
1407 vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx);
1408 err_pm:
1409 pm_runtime_put(dev);
1410 err_dbg:
1411 bdisp_debugfs_remove(bdisp);
1412 err_v4l2:
1413 v4l2_device_unregister(&bdisp->v4l2_dev);
1414 err_clk:
1415 if (!IS_ERR(bdisp->clock))
1416 clk_unprepare(bdisp->clock);
1417
1418 return ret;
1419 }
1420
1421 static const struct of_device_id bdisp_match_types[] = {
1422 {
1423 .compatible = "st,stih407-bdisp",
1424 },
1425 { /* end node */ }
1426 };
1427
1428 MODULE_DEVICE_TABLE(of, bdisp_match_types);
1429
1430 static struct platform_driver bdisp_driver = {
1431 .probe = bdisp_probe,
1432 .remove = bdisp_remove,
1433 .driver = {
1434 .name = BDISP_NAME,
1435 .of_match_table = bdisp_match_types,
1436 .pm = &bdisp_pm_ops,
1437 },
1438 };
1439
1440 module_platform_driver(bdisp_driver);
1441
1442 MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
1443 MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
1444 MODULE_LICENSE("GPL");
1445