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->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
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->vb2_buf.timestamp = src_vb->vb2_buf.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,unsigned int * nb_buf,unsigned int * nb_planes,unsigned int sizes[],struct device * alloc_devs[])440 static int bdisp_queue_setup(struct vb2_queue *vq,
441 unsigned int *nb_buf, unsigned int *nb_planes,
442 unsigned int sizes[], struct device *alloc_devs[])
443 {
444 struct bdisp_ctx *ctx = vb2_get_drv_priv(vq);
445 struct bdisp_frame *frame = ctx_get_frame(ctx, vq->type);
446
447 if (IS_ERR(frame)) {
448 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
449 return PTR_ERR(frame);
450 }
451
452 if (!frame->fmt) {
453 dev_err(ctx->bdisp_dev->dev, "Invalid format\n");
454 return -EINVAL;
455 }
456
457 if (*nb_planes)
458 return sizes[0] < frame->sizeimage ? -EINVAL : 0;
459
460 *nb_planes = 1;
461 sizes[0] = frame->sizeimage;
462
463 return 0;
464 }
465
bdisp_buf_prepare(struct vb2_buffer * vb)466 static int bdisp_buf_prepare(struct vb2_buffer *vb)
467 {
468 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
469 struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type);
470
471 if (IS_ERR(frame)) {
472 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
473 return PTR_ERR(frame);
474 }
475
476 if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
477 vb2_set_plane_payload(vb, 0, frame->sizeimage);
478
479 return 0;
480 }
481
bdisp_buf_queue(struct vb2_buffer * vb)482 static void bdisp_buf_queue(struct vb2_buffer *vb)
483 {
484 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
485 struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
486
487 /* return to V4L2 any 0-size buffer so it can be dequeued by user */
488 if (!vb2_get_plane_payload(vb, 0)) {
489 dev_dbg(ctx->bdisp_dev->dev, "0 data buffer, skip it\n");
490 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
491 return;
492 }
493
494 if (ctx->fh.m2m_ctx)
495 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
496 }
497
bdisp_start_streaming(struct vb2_queue * q,unsigned int count)498 static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count)
499 {
500 struct bdisp_ctx *ctx = q->drv_priv;
501 struct vb2_v4l2_buffer *buf;
502 int ret = pm_runtime_get_sync(ctx->bdisp_dev->dev);
503
504 if (ret < 0) {
505 dev_err(ctx->bdisp_dev->dev, "failed to set runtime PM\n");
506
507 if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
508 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
509 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
510 } else {
511 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
512 v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
513 }
514
515 return ret;
516 }
517
518 return 0;
519 }
520
bdisp_stop_streaming(struct vb2_queue * q)521 static void bdisp_stop_streaming(struct vb2_queue *q)
522 {
523 struct bdisp_ctx *ctx = q->drv_priv;
524
525 __bdisp_job_abort(ctx);
526
527 pm_runtime_put(ctx->bdisp_dev->dev);
528 }
529
530 static const struct vb2_ops bdisp_qops = {
531 .queue_setup = bdisp_queue_setup,
532 .buf_prepare = bdisp_buf_prepare,
533 .buf_queue = bdisp_buf_queue,
534 .wait_prepare = vb2_ops_wait_prepare,
535 .wait_finish = vb2_ops_wait_finish,
536 .stop_streaming = bdisp_stop_streaming,
537 .start_streaming = bdisp_start_streaming,
538 };
539
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)540 static int queue_init(void *priv,
541 struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
542 {
543 struct bdisp_ctx *ctx = priv;
544 int ret;
545
546 memset(src_vq, 0, sizeof(*src_vq));
547 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
548 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
549 src_vq->drv_priv = ctx;
550 src_vq->ops = &bdisp_qops;
551 src_vq->mem_ops = &vb2_dma_contig_memops;
552 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
553 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
554 src_vq->lock = &ctx->bdisp_dev->lock;
555 src_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
556
557 ret = vb2_queue_init(src_vq);
558 if (ret)
559 return ret;
560
561 memset(dst_vq, 0, sizeof(*dst_vq));
562 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
563 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
564 dst_vq->drv_priv = ctx;
565 dst_vq->ops = &bdisp_qops;
566 dst_vq->mem_ops = &vb2_dma_contig_memops;
567 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
568 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
569 dst_vq->lock = &ctx->bdisp_dev->lock;
570 dst_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
571
572 return vb2_queue_init(dst_vq);
573 }
574
bdisp_open(struct file * file)575 static int bdisp_open(struct file *file)
576 {
577 struct bdisp_dev *bdisp = video_drvdata(file);
578 struct bdisp_ctx *ctx = NULL;
579 int ret;
580
581 if (mutex_lock_interruptible(&bdisp->lock))
582 return -ERESTARTSYS;
583
584 /* Allocate memory for both context and node */
585 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
586 if (!ctx) {
587 ret = -ENOMEM;
588 goto unlock;
589 }
590 ctx->bdisp_dev = bdisp;
591
592 if (bdisp_hw_alloc_nodes(ctx)) {
593 dev_err(bdisp->dev, "no memory for nodes\n");
594 ret = -ENOMEM;
595 goto mem_ctx;
596 }
597
598 v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev);
599
600 ret = bdisp_ctrls_create(ctx);
601 if (ret) {
602 dev_err(bdisp->dev, "Failed to create control\n");
603 goto error_fh;
604 }
605
606 /* Use separate control handler per file handle */
607 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
608 file->private_data = &ctx->fh;
609 v4l2_fh_add(&ctx->fh);
610
611 /* Default format */
612 ctx->src = bdisp_dflt_fmt;
613 ctx->dst = bdisp_dflt_fmt;
614
615 /* Setup the device context for mem2mem mode. */
616 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx,
617 queue_init);
618 if (IS_ERR(ctx->fh.m2m_ctx)) {
619 dev_err(bdisp->dev, "Failed to initialize m2m context\n");
620 ret = PTR_ERR(ctx->fh.m2m_ctx);
621 goto error_ctrls;
622 }
623
624 bdisp->m2m.refcnt++;
625 set_bit(ST_M2M_OPEN, &bdisp->state);
626
627 dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx);
628
629 mutex_unlock(&bdisp->lock);
630
631 return 0;
632
633 error_ctrls:
634 bdisp_ctrls_delete(ctx);
635 error_fh:
636 v4l2_fh_del(&ctx->fh);
637 v4l2_fh_exit(&ctx->fh);
638 bdisp_hw_free_nodes(ctx);
639 mem_ctx:
640 kfree(ctx);
641 unlock:
642 mutex_unlock(&bdisp->lock);
643
644 return ret;
645 }
646
bdisp_release(struct file * file)647 static int bdisp_release(struct file *file)
648 {
649 struct bdisp_ctx *ctx = fh_to_ctx(file->private_data);
650 struct bdisp_dev *bdisp = ctx->bdisp_dev;
651
652 dev_dbg(bdisp->dev, "%s\n", __func__);
653
654 if (mutex_lock_interruptible(&bdisp->lock))
655 return -ERESTARTSYS;
656
657 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
658
659 bdisp_ctrls_delete(ctx);
660
661 v4l2_fh_del(&ctx->fh);
662 v4l2_fh_exit(&ctx->fh);
663
664 if (--bdisp->m2m.refcnt <= 0)
665 clear_bit(ST_M2M_OPEN, &bdisp->state);
666
667 bdisp_hw_free_nodes(ctx);
668
669 kfree(ctx);
670
671 mutex_unlock(&bdisp->lock);
672
673 return 0;
674 }
675
676 static const struct v4l2_file_operations bdisp_fops = {
677 .owner = THIS_MODULE,
678 .open = bdisp_open,
679 .release = bdisp_release,
680 .poll = v4l2_m2m_fop_poll,
681 .unlocked_ioctl = video_ioctl2,
682 .mmap = v4l2_m2m_fop_mmap,
683 };
684
bdisp_querycap(struct file * file,void * fh,struct v4l2_capability * cap)685 static int bdisp_querycap(struct file *file, void *fh,
686 struct v4l2_capability *cap)
687 {
688 struct bdisp_ctx *ctx = fh_to_ctx(fh);
689 struct bdisp_dev *bdisp = ctx->bdisp_dev;
690
691 strlcpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver));
692 strlcpy(cap->card, bdisp->pdev->name, sizeof(cap->card));
693 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s%d",
694 BDISP_NAME, bdisp->id);
695
696 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
697
698 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
699
700 return 0;
701 }
702
bdisp_enum_fmt(struct file * file,void * fh,struct v4l2_fmtdesc * f)703 static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
704 {
705 struct bdisp_ctx *ctx = fh_to_ctx(fh);
706 const struct bdisp_fmt *fmt;
707
708 if (f->index >= ARRAY_SIZE(bdisp_formats))
709 return -EINVAL;
710
711 fmt = &bdisp_formats[f->index];
712
713 if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) &&
714 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
715 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
716 return -EINVAL;
717 }
718 f->pixelformat = fmt->pixelformat;
719
720 return 0;
721 }
722
bdisp_g_fmt(struct file * file,void * fh,struct v4l2_format * f)723 static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
724 {
725 struct bdisp_ctx *ctx = fh_to_ctx(fh);
726 struct v4l2_pix_format *pix = &f->fmt.pix;
727 struct bdisp_frame *frame = ctx_get_frame(ctx, f->type);
728
729 if (IS_ERR(frame)) {
730 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
731 return PTR_ERR(frame);
732 }
733
734 pix = &f->fmt.pix;
735 pix->width = frame->width;
736 pix->height = frame->height;
737 pix->pixelformat = frame->fmt->pixelformat;
738 pix->field = frame->field;
739 pix->bytesperline = frame->bytesperline;
740 pix->sizeimage = frame->sizeimage;
741 pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
742 frame->colorspace : bdisp_dflt_fmt.colorspace;
743
744 return 0;
745 }
746
bdisp_try_fmt(struct file * file,void * fh,struct v4l2_format * f)747 static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
748 {
749 struct bdisp_ctx *ctx = fh_to_ctx(fh);
750 struct v4l2_pix_format *pix = &f->fmt.pix;
751 const struct bdisp_fmt *format;
752 u32 in_w, in_h;
753
754 format = bdisp_find_fmt(pix->pixelformat);
755 if (!format) {
756 dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
757 pix->pixelformat);
758 return -EINVAL;
759 }
760
761 /* YUV420P only supported for VIDEO_OUTPUT */
762 if ((format->pixelformat == V4L2_PIX_FMT_YUV420) &&
763 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
764 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
765 return -EINVAL;
766 }
767
768 /* Field (interlaced only supported on OUTPUT) */
769 if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
770 (pix->field != V4L2_FIELD_INTERLACED))
771 pix->field = V4L2_FIELD_NONE;
772
773 /* Adjust width & height */
774 in_w = pix->width;
775 in_h = pix->height;
776 v4l_bound_align_image(&pix->width,
777 BDISP_MIN_W, BDISP_MAX_W,
778 ffs(format->w_align) - 1,
779 &pix->height,
780 BDISP_MIN_H, BDISP_MAX_H,
781 ffs(format->h_align) - 1,
782 0);
783 if ((pix->width != in_w) || (pix->height != in_h))
784 dev_dbg(ctx->bdisp_dev->dev,
785 "%s size updated: %dx%d -> %dx%d\n", __func__,
786 in_w, in_h, pix->width, pix->height);
787
788 pix->bytesperline = (pix->width * format->bpp_plane0) / 8;
789 pix->sizeimage = (pix->width * pix->height * format->bpp) / 8;
790
791 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
792 pix->colorspace = bdisp_dflt_fmt.colorspace;
793
794 return 0;
795 }
796
bdisp_s_fmt(struct file * file,void * fh,struct v4l2_format * f)797 static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
798 {
799 struct bdisp_ctx *ctx = fh_to_ctx(fh);
800 struct vb2_queue *vq;
801 struct bdisp_frame *frame;
802 struct v4l2_pix_format *pix;
803 int ret;
804 u32 state;
805
806 ret = bdisp_try_fmt(file, fh, f);
807 if (ret) {
808 dev_err(ctx->bdisp_dev->dev, "Cannot set format\n");
809 return ret;
810 }
811
812 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
813 if (vb2_is_streaming(vq)) {
814 dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type);
815 return -EBUSY;
816 }
817
818 frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
819 &ctx->src : &ctx->dst;
820 pix = &f->fmt.pix;
821 frame->fmt = bdisp_find_fmt(pix->pixelformat);
822 if (!frame->fmt) {
823 dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
824 pix->pixelformat);
825 return -EINVAL;
826 }
827
828 frame->width = pix->width;
829 frame->height = pix->height;
830 frame->bytesperline = pix->bytesperline;
831 frame->sizeimage = pix->sizeimage;
832 frame->field = pix->field;
833 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
834 frame->colorspace = pix->colorspace;
835
836 frame->crop.width = frame->width;
837 frame->crop.height = frame->height;
838 frame->crop.left = 0;
839 frame->crop.top = 0;
840
841 state = BDISP_PARAMS;
842 state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
843 BDISP_DST_FMT : BDISP_SRC_FMT;
844 bdisp_ctx_state_lock_set(state, ctx);
845
846 return 0;
847 }
848
bdisp_g_selection(struct file * file,void * fh,struct v4l2_selection * s)849 static int bdisp_g_selection(struct file *file, void *fh,
850 struct v4l2_selection *s)
851 {
852 struct bdisp_frame *frame;
853 struct bdisp_ctx *ctx = fh_to_ctx(fh);
854
855 frame = ctx_get_frame(ctx, s->type);
856 if (IS_ERR(frame)) {
857 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
858 return PTR_ERR(frame);
859 }
860
861 switch (s->type) {
862 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
863 switch (s->target) {
864 case V4L2_SEL_TGT_CROP:
865 /* cropped frame */
866 s->r = frame->crop;
867 break;
868 case V4L2_SEL_TGT_CROP_DEFAULT:
869 case V4L2_SEL_TGT_CROP_BOUNDS:
870 /* complete frame */
871 s->r.left = 0;
872 s->r.top = 0;
873 s->r.width = frame->width;
874 s->r.height = frame->height;
875 break;
876 default:
877 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
878 return -EINVAL;
879 }
880 break;
881
882 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
883 switch (s->target) {
884 case V4L2_SEL_TGT_COMPOSE:
885 case V4L2_SEL_TGT_COMPOSE_PADDED:
886 /* composed (cropped) frame */
887 s->r = frame->crop;
888 break;
889 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
890 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
891 /* complete frame */
892 s->r.left = 0;
893 s->r.top = 0;
894 s->r.width = frame->width;
895 s->r.height = frame->height;
896 break;
897 default:
898 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
899 return -EINVAL;
900 }
901 break;
902
903 default:
904 dev_err(ctx->bdisp_dev->dev, "Invalid type\n");
905 return -EINVAL;
906 }
907
908 return 0;
909 }
910
is_rect_enclosed(struct v4l2_rect * a,struct v4l2_rect * b)911 static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
912 {
913 /* Return 1 if a is enclosed in b, or 0 otherwise. */
914
915 if (a->left < b->left || a->top < b->top)
916 return 0;
917
918 if (a->left + a->width > b->left + b->width)
919 return 0;
920
921 if (a->top + a->height > b->top + b->height)
922 return 0;
923
924 return 1;
925 }
926
bdisp_s_selection(struct file * file,void * fh,struct v4l2_selection * s)927 static int bdisp_s_selection(struct file *file, void *fh,
928 struct v4l2_selection *s)
929 {
930 struct bdisp_frame *frame;
931 struct bdisp_ctx *ctx = fh_to_ctx(fh);
932 struct v4l2_rect *in, out;
933 bool valid = false;
934
935 if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
936 (s->target == V4L2_SEL_TGT_CROP))
937 valid = true;
938
939 if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
940 (s->target == V4L2_SEL_TGT_COMPOSE))
941 valid = true;
942
943 if (!valid) {
944 dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n");
945 return -EINVAL;
946 }
947
948 frame = ctx_get_frame(ctx, s->type);
949 if (IS_ERR(frame)) {
950 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
951 return PTR_ERR(frame);
952 }
953
954 in = &s->r;
955 out = *in;
956
957 /* Align and check origin */
958 out.left = ALIGN(in->left, frame->fmt->w_align);
959 out.top = ALIGN(in->top, frame->fmt->h_align);
960
961 if ((out.left < 0) || (out.left >= frame->width) ||
962 (out.top < 0) || (out.top >= frame->height)) {
963 dev_err(ctx->bdisp_dev->dev,
964 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
965 out.width, out.height, out.left, out.top,
966 frame->width, frame->height);
967 return -EINVAL;
968 }
969
970 /* Align and check size */
971 out.width = ALIGN(in->width, frame->fmt->w_align);
972 out.height = ALIGN(in->height, frame->fmt->w_align);
973
974 if (((out.left + out.width) > frame->width) ||
975 ((out.top + out.height) > frame->height)) {
976 dev_err(ctx->bdisp_dev->dev,
977 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
978 out.width, out.height, out.left, out.top,
979 frame->width, frame->height);
980 return -EINVAL;
981 }
982
983 /* Checks adjust constraints flags */
984 if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
985 return -ERANGE;
986
987 if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
988 return -ERANGE;
989
990 if ((out.left != in->left) || (out.top != in->top) ||
991 (out.width != in->width) || (out.height != in->height)) {
992 dev_dbg(ctx->bdisp_dev->dev,
993 "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
994 __func__, in->width, in->height, in->left, in->top,
995 out.width, out.height, out.left, out.top);
996 *in = out;
997 }
998
999 frame->crop = out;
1000
1001 bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
1002
1003 return 0;
1004 }
1005
bdisp_streamon(struct file * file,void * fh,enum v4l2_buf_type type)1006 static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1007 {
1008 struct bdisp_ctx *ctx = fh_to_ctx(fh);
1009
1010 if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
1011 !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
1012 dev_err(ctx->bdisp_dev->dev, "src not defined\n");
1013 return -EINVAL;
1014 }
1015
1016 if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
1017 !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
1018 dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
1019 return -EINVAL;
1020 }
1021
1022 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
1023 }
1024
1025 static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
1026 .vidioc_querycap = bdisp_querycap,
1027 .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt,
1028 .vidioc_enum_fmt_vid_out = bdisp_enum_fmt,
1029 .vidioc_g_fmt_vid_cap = bdisp_g_fmt,
1030 .vidioc_g_fmt_vid_out = bdisp_g_fmt,
1031 .vidioc_try_fmt_vid_cap = bdisp_try_fmt,
1032 .vidioc_try_fmt_vid_out = bdisp_try_fmt,
1033 .vidioc_s_fmt_vid_cap = bdisp_s_fmt,
1034 .vidioc_s_fmt_vid_out = bdisp_s_fmt,
1035 .vidioc_g_selection = bdisp_g_selection,
1036 .vidioc_s_selection = bdisp_s_selection,
1037 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
1038 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
1039 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
1040 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
1041 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
1042 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
1043 .vidioc_streamon = bdisp_streamon,
1044 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
1045 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1046 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1047 };
1048
bdisp_register_device(struct bdisp_dev * bdisp)1049 static int bdisp_register_device(struct bdisp_dev *bdisp)
1050 {
1051 int ret;
1052
1053 if (!bdisp)
1054 return -ENODEV;
1055
1056 bdisp->vdev.fops = &bdisp_fops;
1057 bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops;
1058 bdisp->vdev.release = video_device_release_empty;
1059 bdisp->vdev.lock = &bdisp->lock;
1060 bdisp->vdev.vfl_dir = VFL_DIR_M2M;
1061 bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev;
1062 snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
1063 BDISP_NAME, bdisp->id);
1064
1065 video_set_drvdata(&bdisp->vdev, bdisp);
1066
1067 bdisp->m2m.vdev = &bdisp->vdev;
1068 bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
1069 if (IS_ERR(bdisp->m2m.m2m_dev)) {
1070 dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
1071 return PTR_ERR(bdisp->m2m.m2m_dev);
1072 }
1073
1074 ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1);
1075 if (ret) {
1076 dev_err(bdisp->dev,
1077 "%s(): failed to register video device\n", __func__);
1078 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1079 return ret;
1080 }
1081
1082 return 0;
1083 }
1084
bdisp_unregister_device(struct bdisp_dev * bdisp)1085 static void bdisp_unregister_device(struct bdisp_dev *bdisp)
1086 {
1087 if (!bdisp)
1088 return;
1089
1090 if (bdisp->m2m.m2m_dev)
1091 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1092
1093 video_unregister_device(bdisp->m2m.vdev);
1094 }
1095
bdisp_irq_thread(int irq,void * priv)1096 static irqreturn_t bdisp_irq_thread(int irq, void *priv)
1097 {
1098 struct bdisp_dev *bdisp = priv;
1099 struct bdisp_ctx *ctx;
1100
1101 spin_lock(&bdisp->slock);
1102
1103 bdisp_dbg_perf_end(bdisp);
1104
1105 cancel_delayed_work(&bdisp->timeout_work);
1106
1107 if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
1108 goto isr_unlock;
1109
1110 if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
1111 set_bit(ST_M2M_SUSPENDED, &bdisp->state);
1112 wake_up(&bdisp->irq_queue);
1113 goto isr_unlock;
1114 }
1115
1116 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1117 if (!ctx || !ctx->fh.m2m_ctx)
1118 goto isr_unlock;
1119
1120 spin_unlock(&bdisp->slock);
1121
1122 bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
1123
1124 if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
1125 bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
1126 wake_up(&bdisp->irq_queue);
1127 }
1128
1129 return IRQ_HANDLED;
1130
1131 isr_unlock:
1132 spin_unlock(&bdisp->slock);
1133
1134 return IRQ_HANDLED;
1135 }
1136
bdisp_irq_handler(int irq,void * priv)1137 static irqreturn_t bdisp_irq_handler(int irq, void *priv)
1138 {
1139 if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
1140 return IRQ_NONE;
1141 else
1142 return IRQ_WAKE_THREAD;
1143 }
1144
bdisp_irq_timeout(struct work_struct * ptr)1145 static void bdisp_irq_timeout(struct work_struct *ptr)
1146 {
1147 struct delayed_work *twork = to_delayed_work(ptr);
1148 struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
1149 timeout_work);
1150 struct bdisp_ctx *ctx;
1151
1152 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1153
1154 dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
1155
1156 spin_lock(&bdisp->slock);
1157 clear_bit(ST_M2M_RUNNING, &bdisp->state);
1158 spin_unlock(&bdisp->slock);
1159
1160 bdisp_hw_reset(bdisp);
1161
1162 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1163 }
1164
bdisp_m2m_suspend(struct bdisp_dev * bdisp)1165 static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
1166 {
1167 unsigned long flags;
1168 int timeout;
1169
1170 spin_lock_irqsave(&bdisp->slock, flags);
1171 if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
1172 spin_unlock_irqrestore(&bdisp->slock, flags);
1173 return 0;
1174 }
1175 clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
1176 set_bit(ST_M2M_SUSPENDING, &bdisp->state);
1177 spin_unlock_irqrestore(&bdisp->slock, flags);
1178
1179 timeout = wait_event_timeout(bdisp->irq_queue,
1180 test_bit(ST_M2M_SUSPENDED, &bdisp->state),
1181 BDISP_WORK_TIMEOUT);
1182
1183 clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
1184
1185 if (!timeout) {
1186 dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
1187 return -EAGAIN;
1188 }
1189
1190 return 0;
1191 }
1192
bdisp_m2m_resume(struct bdisp_dev * bdisp)1193 static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
1194 {
1195 struct bdisp_ctx *ctx;
1196 unsigned long flags;
1197
1198 spin_lock_irqsave(&bdisp->slock, flags);
1199 ctx = bdisp->m2m.ctx;
1200 bdisp->m2m.ctx = NULL;
1201 spin_unlock_irqrestore(&bdisp->slock, flags);
1202
1203 if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
1204 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1205
1206 return 0;
1207 }
1208
bdisp_runtime_resume(struct device * dev)1209 static int bdisp_runtime_resume(struct device *dev)
1210 {
1211 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1212 int ret = clk_enable(bdisp->clock);
1213
1214 if (ret)
1215 return ret;
1216
1217 return bdisp_m2m_resume(bdisp);
1218 }
1219
bdisp_runtime_suspend(struct device * dev)1220 static int bdisp_runtime_suspend(struct device *dev)
1221 {
1222 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1223 int ret = bdisp_m2m_suspend(bdisp);
1224
1225 if (!ret)
1226 clk_disable(bdisp->clock);
1227
1228 return ret;
1229 }
1230
bdisp_resume(struct device * dev)1231 static int bdisp_resume(struct device *dev)
1232 {
1233 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1234 unsigned long flags;
1235 int opened;
1236
1237 spin_lock_irqsave(&bdisp->slock, flags);
1238 opened = test_bit(ST_M2M_OPEN, &bdisp->state);
1239 spin_unlock_irqrestore(&bdisp->slock, flags);
1240
1241 if (!opened)
1242 return 0;
1243
1244 if (!pm_runtime_suspended(dev))
1245 return bdisp_runtime_resume(dev);
1246
1247 return 0;
1248 }
1249
bdisp_suspend(struct device * dev)1250 static int bdisp_suspend(struct device *dev)
1251 {
1252 if (!pm_runtime_suspended(dev))
1253 return bdisp_runtime_suspend(dev);
1254
1255 return 0;
1256 }
1257
1258 static const struct dev_pm_ops bdisp_pm_ops = {
1259 .suspend = bdisp_suspend,
1260 .resume = bdisp_resume,
1261 .runtime_suspend = bdisp_runtime_suspend,
1262 .runtime_resume = bdisp_runtime_resume,
1263 };
1264
bdisp_remove(struct platform_device * pdev)1265 static int bdisp_remove(struct platform_device *pdev)
1266 {
1267 struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
1268
1269 bdisp_unregister_device(bdisp);
1270
1271 bdisp_hw_free_filters(bdisp->dev);
1272
1273 pm_runtime_disable(&pdev->dev);
1274
1275 bdisp_debugfs_remove(bdisp);
1276
1277 v4l2_device_unregister(&bdisp->v4l2_dev);
1278
1279 if (!IS_ERR(bdisp->clock))
1280 clk_unprepare(bdisp->clock);
1281
1282 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1283
1284 return 0;
1285 }
1286
bdisp_probe(struct platform_device * pdev)1287 static int bdisp_probe(struct platform_device *pdev)
1288 {
1289 struct bdisp_dev *bdisp;
1290 struct resource *res;
1291 struct device *dev = &pdev->dev;
1292 int ret;
1293
1294 dev_dbg(dev, "%s\n", __func__);
1295
1296 bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
1297 if (!bdisp)
1298 return -ENOMEM;
1299
1300 bdisp->pdev = pdev;
1301 bdisp->dev = dev;
1302 platform_set_drvdata(pdev, bdisp);
1303
1304 if (dev->of_node)
1305 bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME);
1306 else
1307 bdisp->id = pdev->id;
1308
1309 init_waitqueue_head(&bdisp->irq_queue);
1310 INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout);
1311 bdisp->work_queue = create_workqueue(BDISP_NAME);
1312
1313 spin_lock_init(&bdisp->slock);
1314 mutex_init(&bdisp->lock);
1315
1316 /* get resources */
1317 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1318 bdisp->regs = devm_ioremap_resource(dev, res);
1319 if (IS_ERR(bdisp->regs)) {
1320 dev_err(dev, "failed to get regs\n");
1321 return PTR_ERR(bdisp->regs);
1322 }
1323
1324 bdisp->clock = devm_clk_get(dev, BDISP_NAME);
1325 if (IS_ERR(bdisp->clock)) {
1326 dev_err(dev, "failed to get clock\n");
1327 return PTR_ERR(bdisp->clock);
1328 }
1329
1330 ret = clk_prepare(bdisp->clock);
1331 if (ret < 0) {
1332 dev_err(dev, "clock prepare failed\n");
1333 bdisp->clock = ERR_PTR(-EINVAL);
1334 return ret;
1335 }
1336
1337 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1338 if (!res) {
1339 dev_err(dev, "failed to get IRQ resource\n");
1340 goto err_clk;
1341 }
1342
1343 ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler,
1344 bdisp_irq_thread, IRQF_ONESHOT,
1345 pdev->name, bdisp);
1346 if (ret) {
1347 dev_err(dev, "failed to install irq\n");
1348 goto err_clk;
1349 }
1350
1351 /* v4l2 register */
1352 ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
1353 if (ret) {
1354 dev_err(dev, "failed to register\n");
1355 goto err_clk;
1356 }
1357
1358 /* Debug */
1359 ret = bdisp_debugfs_create(bdisp);
1360 if (ret) {
1361 dev_err(dev, "failed to create debugfs\n");
1362 goto err_v4l2;
1363 }
1364
1365 /* Power management */
1366 pm_runtime_enable(dev);
1367 ret = pm_runtime_get_sync(dev);
1368 if (ret < 0) {
1369 dev_err(dev, "failed to set PM\n");
1370 goto err_dbg;
1371 }
1372
1373 /* Filters */
1374 if (bdisp_hw_alloc_filters(bdisp->dev)) {
1375 dev_err(bdisp->dev, "no memory for filters\n");
1376 ret = -ENOMEM;
1377 goto err_pm;
1378 }
1379
1380 /* Register */
1381 ret = bdisp_register_device(bdisp);
1382 if (ret) {
1383 dev_err(dev, "failed to register\n");
1384 goto err_filter;
1385 }
1386
1387 dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
1388 bdisp->id, bdisp->vdev.num);
1389
1390 pm_runtime_put(dev);
1391
1392 return 0;
1393
1394 err_filter:
1395 bdisp_hw_free_filters(bdisp->dev);
1396 err_pm:
1397 pm_runtime_put(dev);
1398 err_dbg:
1399 bdisp_debugfs_remove(bdisp);
1400 err_v4l2:
1401 v4l2_device_unregister(&bdisp->v4l2_dev);
1402 err_clk:
1403 if (!IS_ERR(bdisp->clock))
1404 clk_unprepare(bdisp->clock);
1405
1406 return ret;
1407 }
1408
1409 static const struct of_device_id bdisp_match_types[] = {
1410 {
1411 .compatible = "st,stih407-bdisp",
1412 },
1413 { /* end node */ }
1414 };
1415
1416 MODULE_DEVICE_TABLE(of, bdisp_match_types);
1417
1418 static struct platform_driver bdisp_driver = {
1419 .probe = bdisp_probe,
1420 .remove = bdisp_remove,
1421 .driver = {
1422 .name = BDISP_NAME,
1423 .of_match_table = bdisp_match_types,
1424 .pm = &bdisp_pm_ops,
1425 },
1426 };
1427
1428 module_platform_driver(bdisp_driver);
1429
1430 MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
1431 MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
1432 MODULE_LICENSE("GPL");
1433