1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Authors: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
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 const 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_resume_and_get(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 .stop_streaming = bdisp_stop_streaming,
535 .start_streaming = bdisp_start_streaming,
536 };
537
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)538 static int queue_init(void *priv,
539 struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
540 {
541 struct bdisp_ctx *ctx = priv;
542 int ret;
543
544 memset(src_vq, 0, sizeof(*src_vq));
545 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
546 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
547 src_vq->drv_priv = ctx;
548 src_vq->ops = &bdisp_qops;
549 src_vq->mem_ops = &vb2_dma_contig_memops;
550 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
551 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
552 src_vq->lock = &ctx->bdisp_dev->lock;
553 src_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
554
555 ret = vb2_queue_init(src_vq);
556 if (ret)
557 return ret;
558
559 memset(dst_vq, 0, sizeof(*dst_vq));
560 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
561 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
562 dst_vq->drv_priv = ctx;
563 dst_vq->ops = &bdisp_qops;
564 dst_vq->mem_ops = &vb2_dma_contig_memops;
565 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
566 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
567 dst_vq->lock = &ctx->bdisp_dev->lock;
568 dst_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
569
570 return vb2_queue_init(dst_vq);
571 }
572
bdisp_open(struct file * file)573 static int bdisp_open(struct file *file)
574 {
575 struct bdisp_dev *bdisp = video_drvdata(file);
576 struct bdisp_ctx *ctx = NULL;
577 int ret;
578
579 if (mutex_lock_interruptible(&bdisp->lock))
580 return -ERESTARTSYS;
581
582 /* Allocate memory for both context and node */
583 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
584 if (!ctx) {
585 ret = -ENOMEM;
586 goto unlock;
587 }
588 ctx->bdisp_dev = bdisp;
589
590 if (bdisp_hw_alloc_nodes(ctx)) {
591 dev_err(bdisp->dev, "no memory for nodes\n");
592 ret = -ENOMEM;
593 goto mem_ctx;
594 }
595
596 v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev);
597
598 ret = bdisp_ctrls_create(ctx);
599 if (ret) {
600 dev_err(bdisp->dev, "Failed to create control\n");
601 goto error_fh;
602 }
603
604 /* Use separate control handler per file handle */
605 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
606 file->private_data = &ctx->fh;
607 v4l2_fh_add(&ctx->fh);
608
609 /* Default format */
610 ctx->src = bdisp_dflt_fmt;
611 ctx->dst = bdisp_dflt_fmt;
612
613 /* Setup the device context for mem2mem mode. */
614 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx,
615 queue_init);
616 if (IS_ERR(ctx->fh.m2m_ctx)) {
617 dev_err(bdisp->dev, "Failed to initialize m2m context\n");
618 ret = PTR_ERR(ctx->fh.m2m_ctx);
619 goto error_ctrls;
620 }
621
622 bdisp->m2m.refcnt++;
623 set_bit(ST_M2M_OPEN, &bdisp->state);
624
625 dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx);
626
627 mutex_unlock(&bdisp->lock);
628
629 return 0;
630
631 error_ctrls:
632 bdisp_ctrls_delete(ctx);
633 v4l2_fh_del(&ctx->fh);
634 error_fh:
635 v4l2_fh_exit(&ctx->fh);
636 bdisp_hw_free_nodes(ctx);
637 mem_ctx:
638 kfree(ctx);
639 unlock:
640 mutex_unlock(&bdisp->lock);
641
642 return ret;
643 }
644
bdisp_release(struct file * file)645 static int bdisp_release(struct file *file)
646 {
647 struct bdisp_ctx *ctx = fh_to_ctx(file->private_data);
648 struct bdisp_dev *bdisp = ctx->bdisp_dev;
649
650 dev_dbg(bdisp->dev, "%s\n", __func__);
651
652 mutex_lock(&bdisp->lock);
653
654 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
655
656 bdisp_ctrls_delete(ctx);
657
658 v4l2_fh_del(&ctx->fh);
659 v4l2_fh_exit(&ctx->fh);
660
661 if (--bdisp->m2m.refcnt <= 0)
662 clear_bit(ST_M2M_OPEN, &bdisp->state);
663
664 bdisp_hw_free_nodes(ctx);
665
666 kfree(ctx);
667
668 mutex_unlock(&bdisp->lock);
669
670 return 0;
671 }
672
673 static const struct v4l2_file_operations bdisp_fops = {
674 .owner = THIS_MODULE,
675 .open = bdisp_open,
676 .release = bdisp_release,
677 .poll = v4l2_m2m_fop_poll,
678 .unlocked_ioctl = video_ioctl2,
679 .mmap = v4l2_m2m_fop_mmap,
680 };
681
bdisp_querycap(struct file * file,void * fh,struct v4l2_capability * cap)682 static int bdisp_querycap(struct file *file, void *fh,
683 struct v4l2_capability *cap)
684 {
685 struct bdisp_ctx *ctx = fh_to_ctx(fh);
686 struct bdisp_dev *bdisp = ctx->bdisp_dev;
687
688 strscpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver));
689 strscpy(cap->card, bdisp->pdev->name, sizeof(cap->card));
690 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s%d",
691 BDISP_NAME, bdisp->id);
692 return 0;
693 }
694
bdisp_enum_fmt(struct file * file,void * fh,struct v4l2_fmtdesc * f)695 static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
696 {
697 struct bdisp_ctx *ctx = fh_to_ctx(fh);
698 const struct bdisp_fmt *fmt;
699
700 if (f->index >= ARRAY_SIZE(bdisp_formats))
701 return -EINVAL;
702
703 fmt = &bdisp_formats[f->index];
704
705 if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) &&
706 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
707 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
708 return -EINVAL;
709 }
710 f->pixelformat = fmt->pixelformat;
711
712 return 0;
713 }
714
bdisp_g_fmt(struct file * file,void * fh,struct v4l2_format * f)715 static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
716 {
717 struct bdisp_ctx *ctx = fh_to_ctx(fh);
718 struct v4l2_pix_format *pix;
719 struct bdisp_frame *frame = ctx_get_frame(ctx, f->type);
720
721 if (IS_ERR(frame)) {
722 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
723 return PTR_ERR(frame);
724 }
725
726 pix = &f->fmt.pix;
727 pix->width = frame->width;
728 pix->height = frame->height;
729 pix->pixelformat = frame->fmt->pixelformat;
730 pix->field = frame->field;
731 pix->bytesperline = frame->bytesperline;
732 pix->sizeimage = frame->sizeimage;
733 pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
734 frame->colorspace : bdisp_dflt_fmt.colorspace;
735
736 return 0;
737 }
738
bdisp_try_fmt(struct file * file,void * fh,struct v4l2_format * f)739 static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
740 {
741 struct bdisp_ctx *ctx = fh_to_ctx(fh);
742 struct v4l2_pix_format *pix = &f->fmt.pix;
743 const struct bdisp_fmt *format;
744 u32 in_w, in_h;
745
746 format = bdisp_find_fmt(pix->pixelformat);
747 if (!format) {
748 dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
749 pix->pixelformat);
750 return -EINVAL;
751 }
752
753 /* YUV420P only supported for VIDEO_OUTPUT */
754 if ((format->pixelformat == V4L2_PIX_FMT_YUV420) &&
755 (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
756 dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
757 return -EINVAL;
758 }
759
760 /* Field (interlaced only supported on OUTPUT) */
761 if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
762 (pix->field != V4L2_FIELD_INTERLACED))
763 pix->field = V4L2_FIELD_NONE;
764
765 /* Adjust width & height */
766 in_w = pix->width;
767 in_h = pix->height;
768 v4l_bound_align_image(&pix->width,
769 BDISP_MIN_W, BDISP_MAX_W,
770 ffs(format->w_align) - 1,
771 &pix->height,
772 BDISP_MIN_H, BDISP_MAX_H,
773 ffs(format->h_align) - 1,
774 0);
775 if ((pix->width != in_w) || (pix->height != in_h))
776 dev_dbg(ctx->bdisp_dev->dev,
777 "%s size updated: %dx%d -> %dx%d\n", __func__,
778 in_w, in_h, pix->width, pix->height);
779
780 pix->bytesperline = (pix->width * format->bpp_plane0) / 8;
781 pix->sizeimage = (pix->width * pix->height * format->bpp) / 8;
782
783 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
784 pix->colorspace = bdisp_dflt_fmt.colorspace;
785
786 return 0;
787 }
788
bdisp_s_fmt(struct file * file,void * fh,struct v4l2_format * f)789 static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
790 {
791 struct bdisp_ctx *ctx = fh_to_ctx(fh);
792 struct vb2_queue *vq;
793 struct bdisp_frame *frame;
794 struct v4l2_pix_format *pix;
795 int ret;
796 u32 state;
797
798 ret = bdisp_try_fmt(file, fh, f);
799 if (ret) {
800 dev_err(ctx->bdisp_dev->dev, "Cannot set format\n");
801 return ret;
802 }
803
804 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
805 if (vb2_is_streaming(vq)) {
806 dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type);
807 return -EBUSY;
808 }
809
810 frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
811 &ctx->src : &ctx->dst;
812 pix = &f->fmt.pix;
813 frame->fmt = bdisp_find_fmt(pix->pixelformat);
814 if (!frame->fmt) {
815 dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
816 pix->pixelformat);
817 return -EINVAL;
818 }
819
820 frame->width = pix->width;
821 frame->height = pix->height;
822 frame->bytesperline = pix->bytesperline;
823 frame->sizeimage = pix->sizeimage;
824 frame->field = pix->field;
825 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
826 frame->colorspace = pix->colorspace;
827
828 frame->crop.width = frame->width;
829 frame->crop.height = frame->height;
830 frame->crop.left = 0;
831 frame->crop.top = 0;
832
833 state = BDISP_PARAMS;
834 state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
835 BDISP_DST_FMT : BDISP_SRC_FMT;
836 bdisp_ctx_state_lock_set(state, ctx);
837
838 return 0;
839 }
840
bdisp_g_selection(struct file * file,void * fh,struct v4l2_selection * s)841 static int bdisp_g_selection(struct file *file, void *fh,
842 struct v4l2_selection *s)
843 {
844 struct bdisp_frame *frame;
845 struct bdisp_ctx *ctx = fh_to_ctx(fh);
846
847 frame = ctx_get_frame(ctx, s->type);
848 if (IS_ERR(frame)) {
849 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
850 return PTR_ERR(frame);
851 }
852
853 switch (s->type) {
854 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
855 switch (s->target) {
856 case V4L2_SEL_TGT_CROP:
857 /* cropped frame */
858 s->r = frame->crop;
859 break;
860 case V4L2_SEL_TGT_CROP_DEFAULT:
861 case V4L2_SEL_TGT_CROP_BOUNDS:
862 /* complete frame */
863 s->r.left = 0;
864 s->r.top = 0;
865 s->r.width = frame->width;
866 s->r.height = frame->height;
867 break;
868 default:
869 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
870 return -EINVAL;
871 }
872 break;
873
874 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
875 switch (s->target) {
876 case V4L2_SEL_TGT_COMPOSE:
877 case V4L2_SEL_TGT_COMPOSE_PADDED:
878 /* composed (cropped) frame */
879 s->r = frame->crop;
880 break;
881 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
882 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
883 /* complete frame */
884 s->r.left = 0;
885 s->r.top = 0;
886 s->r.width = frame->width;
887 s->r.height = frame->height;
888 break;
889 default:
890 dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
891 return -EINVAL;
892 }
893 break;
894
895 default:
896 dev_err(ctx->bdisp_dev->dev, "Invalid type\n");
897 return -EINVAL;
898 }
899
900 return 0;
901 }
902
is_rect_enclosed(struct v4l2_rect * a,struct v4l2_rect * b)903 static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
904 {
905 /* Return 1 if a is enclosed in b, or 0 otherwise. */
906
907 if (a->left < b->left || a->top < b->top)
908 return 0;
909
910 if (a->left + a->width > b->left + b->width)
911 return 0;
912
913 if (a->top + a->height > b->top + b->height)
914 return 0;
915
916 return 1;
917 }
918
bdisp_s_selection(struct file * file,void * fh,struct v4l2_selection * s)919 static int bdisp_s_selection(struct file *file, void *fh,
920 struct v4l2_selection *s)
921 {
922 struct bdisp_frame *frame;
923 struct bdisp_ctx *ctx = fh_to_ctx(fh);
924 struct v4l2_rect *in, out;
925 bool valid = false;
926
927 if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
928 (s->target == V4L2_SEL_TGT_CROP))
929 valid = true;
930
931 if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
932 (s->target == V4L2_SEL_TGT_COMPOSE))
933 valid = true;
934
935 if (!valid) {
936 dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n");
937 return -EINVAL;
938 }
939
940 frame = ctx_get_frame(ctx, s->type);
941 if (IS_ERR(frame)) {
942 dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
943 return PTR_ERR(frame);
944 }
945
946 in = &s->r;
947 out = *in;
948
949 /* Align and check origin */
950 out.left = ALIGN(in->left, frame->fmt->w_align);
951 out.top = ALIGN(in->top, frame->fmt->h_align);
952
953 if ((out.left < 0) || (out.left >= frame->width) ||
954 (out.top < 0) || (out.top >= frame->height)) {
955 dev_err(ctx->bdisp_dev->dev,
956 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
957 out.width, out.height, out.left, out.top,
958 frame->width, frame->height);
959 return -EINVAL;
960 }
961
962 /* Align and check size */
963 out.width = ALIGN(in->width, frame->fmt->w_align);
964 out.height = ALIGN(in->height, frame->fmt->w_align);
965
966 if (((out.left + out.width) > frame->width) ||
967 ((out.top + out.height) > frame->height)) {
968 dev_err(ctx->bdisp_dev->dev,
969 "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
970 out.width, out.height, out.left, out.top,
971 frame->width, frame->height);
972 return -EINVAL;
973 }
974
975 /* Checks adjust constraints flags */
976 if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
977 return -ERANGE;
978
979 if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
980 return -ERANGE;
981
982 if ((out.left != in->left) || (out.top != in->top) ||
983 (out.width != in->width) || (out.height != in->height)) {
984 dev_dbg(ctx->bdisp_dev->dev,
985 "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
986 __func__, in->width, in->height, in->left, in->top,
987 out.width, out.height, out.left, out.top);
988 *in = out;
989 }
990
991 frame->crop = out;
992
993 bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
994
995 return 0;
996 }
997
bdisp_streamon(struct file * file,void * fh,enum v4l2_buf_type type)998 static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
999 {
1000 struct bdisp_ctx *ctx = fh_to_ctx(fh);
1001
1002 if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
1003 !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
1004 dev_err(ctx->bdisp_dev->dev, "src not defined\n");
1005 return -EINVAL;
1006 }
1007
1008 if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
1009 !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
1010 dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
1011 return -EINVAL;
1012 }
1013
1014 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
1015 }
1016
1017 static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
1018 .vidioc_querycap = bdisp_querycap,
1019 .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt,
1020 .vidioc_enum_fmt_vid_out = bdisp_enum_fmt,
1021 .vidioc_g_fmt_vid_cap = bdisp_g_fmt,
1022 .vidioc_g_fmt_vid_out = bdisp_g_fmt,
1023 .vidioc_try_fmt_vid_cap = bdisp_try_fmt,
1024 .vidioc_try_fmt_vid_out = bdisp_try_fmt,
1025 .vidioc_s_fmt_vid_cap = bdisp_s_fmt,
1026 .vidioc_s_fmt_vid_out = bdisp_s_fmt,
1027 .vidioc_g_selection = bdisp_g_selection,
1028 .vidioc_s_selection = bdisp_s_selection,
1029 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
1030 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
1031 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
1032 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
1033 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
1034 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
1035 .vidioc_streamon = bdisp_streamon,
1036 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
1037 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1038 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1039 };
1040
bdisp_register_device(struct bdisp_dev * bdisp)1041 static int bdisp_register_device(struct bdisp_dev *bdisp)
1042 {
1043 int ret;
1044
1045 if (!bdisp)
1046 return -ENODEV;
1047
1048 bdisp->vdev.fops = &bdisp_fops;
1049 bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops;
1050 bdisp->vdev.release = video_device_release_empty;
1051 bdisp->vdev.lock = &bdisp->lock;
1052 bdisp->vdev.vfl_dir = VFL_DIR_M2M;
1053 bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev;
1054 bdisp->vdev.device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
1055 snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
1056 BDISP_NAME, bdisp->id);
1057
1058 video_set_drvdata(&bdisp->vdev, bdisp);
1059
1060 bdisp->m2m.vdev = &bdisp->vdev;
1061 bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
1062 if (IS_ERR(bdisp->m2m.m2m_dev)) {
1063 dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
1064 return PTR_ERR(bdisp->m2m.m2m_dev);
1065 }
1066
1067 ret = video_register_device(&bdisp->vdev, VFL_TYPE_VIDEO, -1);
1068 if (ret) {
1069 dev_err(bdisp->dev,
1070 "%s(): failed to register video device\n", __func__);
1071 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1072 return ret;
1073 }
1074
1075 return 0;
1076 }
1077
bdisp_unregister_device(struct bdisp_dev * bdisp)1078 static void bdisp_unregister_device(struct bdisp_dev *bdisp)
1079 {
1080 if (!bdisp)
1081 return;
1082
1083 if (bdisp->m2m.m2m_dev)
1084 v4l2_m2m_release(bdisp->m2m.m2m_dev);
1085
1086 video_unregister_device(bdisp->m2m.vdev);
1087 }
1088
bdisp_irq_thread(int irq,void * priv)1089 static irqreturn_t bdisp_irq_thread(int irq, void *priv)
1090 {
1091 struct bdisp_dev *bdisp = priv;
1092 struct bdisp_ctx *ctx;
1093
1094 spin_lock(&bdisp->slock);
1095
1096 bdisp_dbg_perf_end(bdisp);
1097
1098 cancel_delayed_work(&bdisp->timeout_work);
1099
1100 if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
1101 goto isr_unlock;
1102
1103 if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
1104 set_bit(ST_M2M_SUSPENDED, &bdisp->state);
1105 wake_up(&bdisp->irq_queue);
1106 goto isr_unlock;
1107 }
1108
1109 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1110 if (!ctx || !ctx->fh.m2m_ctx)
1111 goto isr_unlock;
1112
1113 spin_unlock(&bdisp->slock);
1114
1115 bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
1116
1117 if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
1118 bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
1119 wake_up(&bdisp->irq_queue);
1120 }
1121
1122 return IRQ_HANDLED;
1123
1124 isr_unlock:
1125 spin_unlock(&bdisp->slock);
1126
1127 return IRQ_HANDLED;
1128 }
1129
bdisp_irq_handler(int irq,void * priv)1130 static irqreturn_t bdisp_irq_handler(int irq, void *priv)
1131 {
1132 if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
1133 return IRQ_NONE;
1134 else
1135 return IRQ_WAKE_THREAD;
1136 }
1137
bdisp_irq_timeout(struct work_struct * ptr)1138 static void bdisp_irq_timeout(struct work_struct *ptr)
1139 {
1140 struct delayed_work *twork = to_delayed_work(ptr);
1141 struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
1142 timeout_work);
1143 struct bdisp_ctx *ctx;
1144
1145 ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1146
1147 dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
1148
1149 spin_lock(&bdisp->slock);
1150 clear_bit(ST_M2M_RUNNING, &bdisp->state);
1151 spin_unlock(&bdisp->slock);
1152
1153 bdisp_hw_reset(bdisp);
1154
1155 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1156 }
1157
bdisp_m2m_suspend(struct bdisp_dev * bdisp)1158 static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
1159 {
1160 unsigned long flags;
1161 long time_left;
1162
1163 spin_lock_irqsave(&bdisp->slock, flags);
1164 if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
1165 spin_unlock_irqrestore(&bdisp->slock, flags);
1166 return 0;
1167 }
1168 clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
1169 set_bit(ST_M2M_SUSPENDING, &bdisp->state);
1170 spin_unlock_irqrestore(&bdisp->slock, flags);
1171
1172 time_left = wait_event_timeout(bdisp->irq_queue,
1173 test_bit(ST_M2M_SUSPENDED, &bdisp->state),
1174 BDISP_WORK_TIMEOUT);
1175
1176 clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
1177
1178 if (!time_left) {
1179 dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
1180 return -EAGAIN;
1181 }
1182
1183 return 0;
1184 }
1185
bdisp_m2m_resume(struct bdisp_dev * bdisp)1186 static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
1187 {
1188 struct bdisp_ctx *ctx;
1189 unsigned long flags;
1190
1191 spin_lock_irqsave(&bdisp->slock, flags);
1192 ctx = bdisp->m2m.ctx;
1193 bdisp->m2m.ctx = NULL;
1194 spin_unlock_irqrestore(&bdisp->slock, flags);
1195
1196 if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
1197 bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1198
1199 return 0;
1200 }
1201
bdisp_runtime_resume(struct device * dev)1202 static int bdisp_runtime_resume(struct device *dev)
1203 {
1204 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1205 int ret = clk_enable(bdisp->clock);
1206
1207 if (ret)
1208 return ret;
1209
1210 return bdisp_m2m_resume(bdisp);
1211 }
1212
bdisp_runtime_suspend(struct device * dev)1213 static int bdisp_runtime_suspend(struct device *dev)
1214 {
1215 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1216 int ret = bdisp_m2m_suspend(bdisp);
1217
1218 if (!ret)
1219 clk_disable(bdisp->clock);
1220
1221 return ret;
1222 }
1223
bdisp_resume(struct device * dev)1224 static int bdisp_resume(struct device *dev)
1225 {
1226 struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1227 unsigned long flags;
1228 int opened;
1229
1230 spin_lock_irqsave(&bdisp->slock, flags);
1231 opened = test_bit(ST_M2M_OPEN, &bdisp->state);
1232 spin_unlock_irqrestore(&bdisp->slock, flags);
1233
1234 if (!opened)
1235 return 0;
1236
1237 if (!pm_runtime_suspended(dev))
1238 return bdisp_runtime_resume(dev);
1239
1240 return 0;
1241 }
1242
bdisp_suspend(struct device * dev)1243 static int bdisp_suspend(struct device *dev)
1244 {
1245 if (!pm_runtime_suspended(dev))
1246 return bdisp_runtime_suspend(dev);
1247
1248 return 0;
1249 }
1250
1251 static const struct dev_pm_ops bdisp_pm_ops = {
1252 .suspend = bdisp_suspend,
1253 .resume = bdisp_resume,
1254 .runtime_suspend = bdisp_runtime_suspend,
1255 .runtime_resume = bdisp_runtime_resume,
1256 };
1257
bdisp_remove(struct platform_device * pdev)1258 static void bdisp_remove(struct platform_device *pdev)
1259 {
1260 struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
1261
1262 bdisp_unregister_device(bdisp);
1263
1264 bdisp_hw_free_filters(bdisp->dev);
1265
1266 pm_runtime_disable(&pdev->dev);
1267
1268 bdisp_debugfs_remove(bdisp);
1269
1270 v4l2_device_unregister(&bdisp->v4l2_dev);
1271
1272 if (!IS_ERR(bdisp->clock))
1273 clk_unprepare(bdisp->clock);
1274
1275 destroy_workqueue(bdisp->work_queue);
1276
1277 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1278 }
1279
bdisp_probe(struct platform_device * pdev)1280 static int bdisp_probe(struct platform_device *pdev)
1281 {
1282 struct bdisp_dev *bdisp;
1283 struct device *dev = &pdev->dev;
1284 int ret;
1285
1286 dev_dbg(dev, "%s\n", __func__);
1287
1288 bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
1289 if (!bdisp)
1290 return -ENOMEM;
1291
1292 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
1293 if (ret)
1294 return ret;
1295
1296 bdisp->pdev = pdev;
1297 bdisp->dev = dev;
1298 platform_set_drvdata(pdev, bdisp);
1299
1300 if (dev->of_node)
1301 bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME);
1302 else
1303 bdisp->id = pdev->id;
1304
1305 init_waitqueue_head(&bdisp->irq_queue);
1306 INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout);
1307 bdisp->work_queue = create_workqueue(BDISP_NAME);
1308 if (!bdisp->work_queue)
1309 return -ENOMEM;
1310
1311 spin_lock_init(&bdisp->slock);
1312 mutex_init(&bdisp->lock);
1313
1314 /* get resources */
1315 bdisp->regs = devm_platform_ioremap_resource(pdev, 0);
1316 if (IS_ERR(bdisp->regs)) {
1317 ret = PTR_ERR(bdisp->regs);
1318 goto err_wq;
1319 }
1320
1321 bdisp->clock = devm_clk_get(dev, BDISP_NAME);
1322 if (IS_ERR(bdisp->clock)) {
1323 dev_err(dev, "failed to get clock\n");
1324 ret = PTR_ERR(bdisp->clock);
1325 goto err_wq;
1326 }
1327
1328 ret = clk_prepare(bdisp->clock);
1329 if (ret < 0) {
1330 dev_err(dev, "clock prepare failed\n");
1331 bdisp->clock = ERR_PTR(-EINVAL);
1332 goto err_wq;
1333 }
1334
1335 ret = platform_get_irq(pdev, 0);
1336 if (ret < 0)
1337 goto err_clk;
1338
1339 ret = devm_request_threaded_irq(dev, ret, bdisp_irq_handler,
1340 bdisp_irq_thread, IRQF_ONESHOT,
1341 pdev->name, bdisp);
1342 if (ret) {
1343 dev_err(dev, "failed to install irq\n");
1344 goto err_clk;
1345 }
1346
1347 /* v4l2 register */
1348 ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
1349 if (ret) {
1350 dev_err(dev, "failed to register\n");
1351 goto err_clk;
1352 }
1353
1354 /* Debug */
1355 bdisp_debugfs_create(bdisp);
1356
1357 /* Power management */
1358 pm_runtime_enable(dev);
1359 ret = pm_runtime_resume_and_get(dev);
1360 if (ret < 0) {
1361 dev_err(dev, "failed to set PM\n");
1362 goto err_remove;
1363 }
1364
1365 /* Filters */
1366 if (bdisp_hw_alloc_filters(bdisp->dev)) {
1367 dev_err(bdisp->dev, "no memory for filters\n");
1368 ret = -ENOMEM;
1369 goto err_pm;
1370 }
1371
1372 /* Register */
1373 ret = bdisp_register_device(bdisp);
1374 if (ret) {
1375 dev_err(dev, "failed to register\n");
1376 goto err_filter;
1377 }
1378
1379 dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
1380 bdisp->id, bdisp->vdev.num);
1381
1382 pm_runtime_put(dev);
1383
1384 return 0;
1385
1386 err_filter:
1387 bdisp_hw_free_filters(bdisp->dev);
1388 err_pm:
1389 pm_runtime_put(dev);
1390 err_remove:
1391 pm_runtime_disable(dev);
1392 bdisp_debugfs_remove(bdisp);
1393 v4l2_device_unregister(&bdisp->v4l2_dev);
1394 err_clk:
1395 clk_unprepare(bdisp->clock);
1396 err_wq:
1397 destroy_workqueue(bdisp->work_queue);
1398 return ret;
1399 }
1400
1401 static const struct of_device_id bdisp_match_types[] = {
1402 {
1403 .compatible = "st,stih407-bdisp",
1404 },
1405 { /* end node */ }
1406 };
1407
1408 MODULE_DEVICE_TABLE(of, bdisp_match_types);
1409
1410 static struct platform_driver bdisp_driver = {
1411 .probe = bdisp_probe,
1412 .remove = bdisp_remove,
1413 .driver = {
1414 .name = BDISP_NAME,
1415 .of_match_table = bdisp_match_types,
1416 .pm = &bdisp_pm_ops,
1417 },
1418 };
1419
1420 module_platform_driver(bdisp_driver);
1421
1422 MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
1423 MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
1424 MODULE_LICENSE("GPL");
1425