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Merge branch 'late/cleanup' into devel-late
[deliverable/linux.git] / drivers / media / video / s5p-mfc / s5p_mfc.c
1 /*
2 * Samsung S5P Multi Format Codec v 5.1
3 *
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Kamil Debski, <k.debski@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13 #include <linux/clk.h>
14 #include <linux/delay.h>
15 #include <linux/interrupt.h>
16 #include <linux/io.h>
17 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
21 #include <linux/videodev2.h>
22 #include <linux/workqueue.h>
23 #include <media/videobuf2-core.h>
24 #include "regs-mfc.h"
25 #include "s5p_mfc_ctrl.h"
26 #include "s5p_mfc_debug.h"
27 #include "s5p_mfc_dec.h"
28 #include "s5p_mfc_enc.h"
29 #include "s5p_mfc_intr.h"
30 #include "s5p_mfc_opr.h"
31 #include "s5p_mfc_pm.h"
32 #include "s5p_mfc_shm.h"
33
34 #define S5P_MFC_NAME "s5p-mfc"
35 #define S5P_MFC_DEC_NAME "s5p-mfc-dec"
36 #define S5P_MFC_ENC_NAME "s5p-mfc-enc"
37
38 int debug;
39 module_param(debug, int, S_IRUGO | S_IWUSR);
40 MODULE_PARM_DESC(debug, "Debug level - higher value produces more verbose messages");
41
42 /* Helper functions for interrupt processing */
43 /* Remove from hw execution round robin */
44 static void clear_work_bit(struct s5p_mfc_ctx *ctx)
45 {
46 struct s5p_mfc_dev *dev = ctx->dev;
47
48 spin_lock(&dev->condlock);
49 clear_bit(ctx->num, &dev->ctx_work_bits);
50 spin_unlock(&dev->condlock);
51 }
52
53 /* Wake up context wait_queue */
54 static void wake_up_ctx(struct s5p_mfc_ctx *ctx, unsigned int reason,
55 unsigned int err)
56 {
57 ctx->int_cond = 1;
58 ctx->int_type = reason;
59 ctx->int_err = err;
60 wake_up(&ctx->queue);
61 }
62
63 /* Wake up device wait_queue */
64 static void wake_up_dev(struct s5p_mfc_dev *dev, unsigned int reason,
65 unsigned int err)
66 {
67 dev->int_cond = 1;
68 dev->int_type = reason;
69 dev->int_err = err;
70 wake_up(&dev->queue);
71 }
72
73 static void s5p_mfc_watchdog(unsigned long arg)
74 {
75 struct s5p_mfc_dev *dev = (struct s5p_mfc_dev *)arg;
76
77 if (test_bit(0, &dev->hw_lock))
78 atomic_inc(&dev->watchdog_cnt);
79 if (atomic_read(&dev->watchdog_cnt) >= MFC_WATCHDOG_CNT) {
80 /* This means that hw is busy and no interrupts were
81 * generated by hw for the Nth time of running this
82 * watchdog timer. This usually means a serious hw
83 * error. Now it is time to kill all instances and
84 * reset the MFC. */
85 mfc_err("Time out during waiting for HW\n");
86 queue_work(dev->watchdog_workqueue, &dev->watchdog_work);
87 }
88 dev->watchdog_timer.expires = jiffies +
89 msecs_to_jiffies(MFC_WATCHDOG_INTERVAL);
90 add_timer(&dev->watchdog_timer);
91 }
92
93 static void s5p_mfc_watchdog_worker(struct work_struct *work)
94 {
95 struct s5p_mfc_dev *dev;
96 struct s5p_mfc_ctx *ctx;
97 unsigned long flags;
98 int mutex_locked;
99 int i, ret;
100
101 dev = container_of(work, struct s5p_mfc_dev, watchdog_work);
102
103 mfc_err("Driver timeout error handling\n");
104 /* Lock the mutex that protects open and release.
105 * This is necessary as they may load and unload firmware. */
106 mutex_locked = mutex_trylock(&dev->mfc_mutex);
107 if (!mutex_locked)
108 mfc_err("Error: some instance may be closing/opening\n");
109 spin_lock_irqsave(&dev->irqlock, flags);
110
111 s5p_mfc_clock_off();
112
113 for (i = 0; i < MFC_NUM_CONTEXTS; i++) {
114 ctx = dev->ctx[i];
115 if (!ctx)
116 continue;
117 ctx->state = MFCINST_ERROR;
118 s5p_mfc_cleanup_queue(&ctx->dst_queue, &ctx->vq_dst);
119 s5p_mfc_cleanup_queue(&ctx->src_queue, &ctx->vq_src);
120 clear_work_bit(ctx);
121 wake_up_ctx(ctx, S5P_FIMV_R2H_CMD_ERR_RET, 0);
122 }
123 clear_bit(0, &dev->hw_lock);
124 spin_unlock_irqrestore(&dev->irqlock, flags);
125 /* Double check if there is at least one instance running.
126 * If no instance is in memory than no firmware should be present */
127 if (dev->num_inst > 0) {
128 ret = s5p_mfc_reload_firmware(dev);
129 if (ret) {
130 mfc_err("Failed to reload FW\n");
131 goto unlock;
132 }
133 s5p_mfc_clock_on();
134 ret = s5p_mfc_init_hw(dev);
135 if (ret)
136 mfc_err("Failed to reinit FW\n");
137 }
138 unlock:
139 if (mutex_locked)
140 mutex_unlock(&dev->mfc_mutex);
141 }
142
143 static enum s5p_mfc_node_type s5p_mfc_get_node_type(struct file *file)
144 {
145 struct video_device *vdev = video_devdata(file);
146
147 if (!vdev) {
148 mfc_err("failed to get video_device");
149 return MFCNODE_INVALID;
150 }
151 if (vdev->index == 0)
152 return MFCNODE_DECODER;
153 else if (vdev->index == 1)
154 return MFCNODE_ENCODER;
155 return MFCNODE_INVALID;
156 }
157
158 static void s5p_mfc_clear_int_flags(struct s5p_mfc_dev *dev)
159 {
160 mfc_write(dev, 0, S5P_FIMV_RISC_HOST_INT);
161 mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD);
162 mfc_write(dev, 0xffff, S5P_FIMV_SI_RTN_CHID);
163 }
164
165 static void s5p_mfc_handle_frame_all_extracted(struct s5p_mfc_ctx *ctx)
166 {
167 struct s5p_mfc_buf *dst_buf;
168
169 ctx->state = MFCINST_FINISHED;
170 ctx->sequence++;
171 while (!list_empty(&ctx->dst_queue)) {
172 dst_buf = list_entry(ctx->dst_queue.next,
173 struct s5p_mfc_buf, list);
174 mfc_debug(2, "Cleaning up buffer: %d\n",
175 dst_buf->b->v4l2_buf.index);
176 vb2_set_plane_payload(dst_buf->b, 0, 0);
177 vb2_set_plane_payload(dst_buf->b, 1, 0);
178 list_del(&dst_buf->list);
179 ctx->dst_queue_cnt--;
180 dst_buf->b->v4l2_buf.sequence = (ctx->sequence++);
181
182 if (s5p_mfc_read_shm(ctx, PIC_TIME_TOP) ==
183 s5p_mfc_read_shm(ctx, PIC_TIME_BOT))
184 dst_buf->b->v4l2_buf.field = V4L2_FIELD_NONE;
185 else
186 dst_buf->b->v4l2_buf.field = V4L2_FIELD_INTERLACED;
187
188 ctx->dec_dst_flag &= ~(1 << dst_buf->b->v4l2_buf.index);
189 vb2_buffer_done(dst_buf->b, VB2_BUF_STATE_DONE);
190 }
191 }
192
193 static void s5p_mfc_handle_frame_copy_time(struct s5p_mfc_ctx *ctx)
194 {
195 struct s5p_mfc_dev *dev = ctx->dev;
196 struct s5p_mfc_buf *dst_buf, *src_buf;
197 size_t dec_y_addr = s5p_mfc_get_dec_y_adr();
198 unsigned int frame_type = s5p_mfc_get_frame_type();
199
200 /* Copy timestamp / timecode from decoded src to dst and set
201 appropraite flags */
202 src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list);
203 list_for_each_entry(dst_buf, &ctx->dst_queue, list) {
204 if (vb2_dma_contig_plane_dma_addr(dst_buf->b, 0) == dec_y_addr) {
205 memcpy(&dst_buf->b->v4l2_buf.timecode,
206 &src_buf->b->v4l2_buf.timecode,
207 sizeof(struct v4l2_timecode));
208 memcpy(&dst_buf->b->v4l2_buf.timestamp,
209 &src_buf->b->v4l2_buf.timestamp,
210 sizeof(struct timeval));
211 switch (frame_type) {
212 case S5P_FIMV_DECODE_FRAME_I_FRAME:
213 dst_buf->b->v4l2_buf.flags |=
214 V4L2_BUF_FLAG_KEYFRAME;
215 break;
216 case S5P_FIMV_DECODE_FRAME_P_FRAME:
217 dst_buf->b->v4l2_buf.flags |=
218 V4L2_BUF_FLAG_PFRAME;
219 break;
220 case S5P_FIMV_DECODE_FRAME_B_FRAME:
221 dst_buf->b->v4l2_buf.flags |=
222 V4L2_BUF_FLAG_BFRAME;
223 break;
224 }
225 break;
226 }
227 }
228 }
229
230 static void s5p_mfc_handle_frame_new(struct s5p_mfc_ctx *ctx, unsigned int err)
231 {
232 struct s5p_mfc_dev *dev = ctx->dev;
233 struct s5p_mfc_buf *dst_buf;
234 size_t dspl_y_addr = s5p_mfc_get_dspl_y_adr();
235 unsigned int frame_type = s5p_mfc_get_frame_type();
236 unsigned int index;
237
238 /* If frame is same as previous then skip and do not dequeue */
239 if (frame_type == S5P_FIMV_DECODE_FRAME_SKIPPED) {
240 if (!ctx->after_packed_pb)
241 ctx->sequence++;
242 ctx->after_packed_pb = 0;
243 return;
244 }
245 ctx->sequence++;
246 /* The MFC returns address of the buffer, now we have to
247 * check which videobuf does it correspond to */
248 list_for_each_entry(dst_buf, &ctx->dst_queue, list) {
249 /* Check if this is the buffer we're looking for */
250 if (vb2_dma_contig_plane_dma_addr(dst_buf->b, 0) == dspl_y_addr) {
251 list_del(&dst_buf->list);
252 ctx->dst_queue_cnt--;
253 dst_buf->b->v4l2_buf.sequence = ctx->sequence;
254 if (s5p_mfc_read_shm(ctx, PIC_TIME_TOP) ==
255 s5p_mfc_read_shm(ctx, PIC_TIME_BOT))
256 dst_buf->b->v4l2_buf.field = V4L2_FIELD_NONE;
257 else
258 dst_buf->b->v4l2_buf.field =
259 V4L2_FIELD_INTERLACED;
260 vb2_set_plane_payload(dst_buf->b, 0, ctx->luma_size);
261 vb2_set_plane_payload(dst_buf->b, 1, ctx->chroma_size);
262 clear_bit(dst_buf->b->v4l2_buf.index,
263 &ctx->dec_dst_flag);
264
265 vb2_buffer_done(dst_buf->b,
266 err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
267
268 index = dst_buf->b->v4l2_buf.index;
269 break;
270 }
271 }
272 }
273
274 /* Handle frame decoding interrupt */
275 static void s5p_mfc_handle_frame(struct s5p_mfc_ctx *ctx,
276 unsigned int reason, unsigned int err)
277 {
278 struct s5p_mfc_dev *dev = ctx->dev;
279 unsigned int dst_frame_status;
280 struct s5p_mfc_buf *src_buf;
281 unsigned long flags;
282 unsigned int res_change;
283
284 unsigned int index;
285
286 dst_frame_status = s5p_mfc_get_dspl_status()
287 & S5P_FIMV_DEC_STATUS_DECODING_STATUS_MASK;
288 res_change = s5p_mfc_get_dspl_status()
289 & S5P_FIMV_DEC_STATUS_RESOLUTION_MASK;
290 mfc_debug(2, "Frame Status: %x\n", dst_frame_status);
291 if (ctx->state == MFCINST_RES_CHANGE_INIT)
292 ctx->state = MFCINST_RES_CHANGE_FLUSH;
293 if (res_change) {
294 ctx->state = MFCINST_RES_CHANGE_INIT;
295 s5p_mfc_clear_int_flags(dev);
296 wake_up_ctx(ctx, reason, err);
297 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
298 BUG();
299 s5p_mfc_clock_off();
300 s5p_mfc_try_run(dev);
301 return;
302 }
303 if (ctx->dpb_flush_flag)
304 ctx->dpb_flush_flag = 0;
305
306 spin_lock_irqsave(&dev->irqlock, flags);
307 /* All frames remaining in the buffer have been extracted */
308 if (dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_EMPTY) {
309 if (ctx->state == MFCINST_RES_CHANGE_FLUSH) {
310 s5p_mfc_handle_frame_all_extracted(ctx);
311 ctx->state = MFCINST_RES_CHANGE_END;
312 goto leave_handle_frame;
313 } else {
314 s5p_mfc_handle_frame_all_extracted(ctx);
315 }
316 }
317
318 if (dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_DISPLAY ||
319 dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_ONLY)
320 s5p_mfc_handle_frame_copy_time(ctx);
321
322 /* A frame has been decoded and is in the buffer */
323 if (dst_frame_status == S5P_FIMV_DEC_STATUS_DISPLAY_ONLY ||
324 dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_DISPLAY) {
325 s5p_mfc_handle_frame_new(ctx, err);
326 } else {
327 mfc_debug(2, "No frame decode\n");
328 }
329 /* Mark source buffer as complete */
330 if (dst_frame_status != S5P_FIMV_DEC_STATUS_DISPLAY_ONLY
331 && !list_empty(&ctx->src_queue)) {
332 src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf,
333 list);
334 ctx->consumed_stream += s5p_mfc_get_consumed_stream();
335 if (ctx->codec_mode != S5P_FIMV_CODEC_H264_DEC &&
336 s5p_mfc_get_frame_type() == S5P_FIMV_DECODE_FRAME_P_FRAME
337 && ctx->consumed_stream + STUFF_BYTE <
338 src_buf->b->v4l2_planes[0].bytesused) {
339 /* Run MFC again on the same buffer */
340 mfc_debug(2, "Running again the same buffer\n");
341 ctx->after_packed_pb = 1;
342 } else {
343 index = src_buf->b->v4l2_buf.index;
344 mfc_debug(2, "MFC needs next buffer\n");
345 ctx->consumed_stream = 0;
346 list_del(&src_buf->list);
347 ctx->src_queue_cnt--;
348 if (s5p_mfc_err_dec(err) > 0)
349 vb2_buffer_done(src_buf->b, VB2_BUF_STATE_ERROR);
350 else
351 vb2_buffer_done(src_buf->b, VB2_BUF_STATE_DONE);
352 }
353 }
354 leave_handle_frame:
355 spin_unlock_irqrestore(&dev->irqlock, flags);
356 if ((ctx->src_queue_cnt == 0 && ctx->state != MFCINST_FINISHING)
357 || ctx->dst_queue_cnt < ctx->dpb_count)
358 clear_work_bit(ctx);
359 s5p_mfc_clear_int_flags(dev);
360 wake_up_ctx(ctx, reason, err);
361 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
362 BUG();
363 s5p_mfc_clock_off();
364 s5p_mfc_try_run(dev);
365 }
366
367 /* Error handling for interrupt */
368 static void s5p_mfc_handle_error(struct s5p_mfc_ctx *ctx,
369 unsigned int reason, unsigned int err)
370 {
371 struct s5p_mfc_dev *dev;
372 unsigned long flags;
373
374 /* If no context is available then all necessary
375 * processing has been done. */
376 if (ctx == NULL)
377 return;
378
379 dev = ctx->dev;
380 mfc_err("Interrupt Error: %08x\n", err);
381 s5p_mfc_clear_int_flags(dev);
382 wake_up_dev(dev, reason, err);
383
384 /* Error recovery is dependent on the state of context */
385 switch (ctx->state) {
386 case MFCINST_INIT:
387 /* This error had to happen while acquireing instance */
388 case MFCINST_GOT_INST:
389 /* This error had to happen while parsing the header */
390 case MFCINST_HEAD_PARSED:
391 /* This error had to happen while setting dst buffers */
392 case MFCINST_RETURN_INST:
393 /* This error had to happen while releasing instance */
394 clear_work_bit(ctx);
395 wake_up_ctx(ctx, reason, err);
396 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
397 BUG();
398 s5p_mfc_clock_off();
399 ctx->state = MFCINST_ERROR;
400 break;
401 case MFCINST_FINISHING:
402 case MFCINST_FINISHED:
403 case MFCINST_RUNNING:
404 /* It is higly probable that an error occured
405 * while decoding a frame */
406 clear_work_bit(ctx);
407 ctx->state = MFCINST_ERROR;
408 /* Mark all dst buffers as having an error */
409 spin_lock_irqsave(&dev->irqlock, flags);
410 s5p_mfc_cleanup_queue(&ctx->dst_queue, &ctx->vq_dst);
411 /* Mark all src buffers as having an error */
412 s5p_mfc_cleanup_queue(&ctx->src_queue, &ctx->vq_src);
413 spin_unlock_irqrestore(&dev->irqlock, flags);
414 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
415 BUG();
416 s5p_mfc_clock_off();
417 break;
418 default:
419 mfc_err("Encountered an error interrupt which had not been handled\n");
420 break;
421 }
422 return;
423 }
424
425 /* Header parsing interrupt handling */
426 static void s5p_mfc_handle_seq_done(struct s5p_mfc_ctx *ctx,
427 unsigned int reason, unsigned int err)
428 {
429 struct s5p_mfc_dev *dev;
430 unsigned int guard_width, guard_height;
431
432 if (ctx == NULL)
433 return;
434 dev = ctx->dev;
435 if (ctx->c_ops->post_seq_start) {
436 if (ctx->c_ops->post_seq_start(ctx))
437 mfc_err("post_seq_start() failed\n");
438 } else {
439 ctx->img_width = s5p_mfc_get_img_width();
440 ctx->img_height = s5p_mfc_get_img_height();
441
442 ctx->buf_width = ALIGN(ctx->img_width,
443 S5P_FIMV_NV12MT_HALIGN);
444 ctx->buf_height = ALIGN(ctx->img_height,
445 S5P_FIMV_NV12MT_VALIGN);
446 mfc_debug(2, "SEQ Done: Movie dimensions %dx%d, "
447 "buffer dimensions: %dx%d\n", ctx->img_width,
448 ctx->img_height, ctx->buf_width,
449 ctx->buf_height);
450 if (ctx->codec_mode == S5P_FIMV_CODEC_H264_DEC) {
451 ctx->luma_size = ALIGN(ctx->buf_width *
452 ctx->buf_height, S5P_FIMV_DEC_BUF_ALIGN);
453 ctx->chroma_size = ALIGN(ctx->buf_width *
454 ALIGN((ctx->img_height >> 1),
455 S5P_FIMV_NV12MT_VALIGN),
456 S5P_FIMV_DEC_BUF_ALIGN);
457 ctx->mv_size = ALIGN(ctx->buf_width *
458 ALIGN((ctx->buf_height >> 2),
459 S5P_FIMV_NV12MT_VALIGN),
460 S5P_FIMV_DEC_BUF_ALIGN);
461 } else {
462 guard_width = ALIGN(ctx->img_width + 24,
463 S5P_FIMV_NV12MT_HALIGN);
464 guard_height = ALIGN(ctx->img_height + 16,
465 S5P_FIMV_NV12MT_VALIGN);
466 ctx->luma_size = ALIGN(guard_width *
467 guard_height, S5P_FIMV_DEC_BUF_ALIGN);
468 guard_width = ALIGN(ctx->img_width + 16,
469 S5P_FIMV_NV12MT_HALIGN);
470 guard_height = ALIGN((ctx->img_height >> 1) + 4,
471 S5P_FIMV_NV12MT_VALIGN);
472 ctx->chroma_size = ALIGN(guard_width *
473 guard_height, S5P_FIMV_DEC_BUF_ALIGN);
474 ctx->mv_size = 0;
475 }
476 ctx->dpb_count = s5p_mfc_get_dpb_count();
477 if (ctx->img_width == 0 || ctx->img_height == 0)
478 ctx->state = MFCINST_ERROR;
479 else
480 ctx->state = MFCINST_HEAD_PARSED;
481 }
482 s5p_mfc_clear_int_flags(dev);
483 clear_work_bit(ctx);
484 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
485 BUG();
486 s5p_mfc_clock_off();
487 s5p_mfc_try_run(dev);
488 wake_up_ctx(ctx, reason, err);
489 }
490
491 /* Header parsing interrupt handling */
492 static void s5p_mfc_handle_init_buffers(struct s5p_mfc_ctx *ctx,
493 unsigned int reason, unsigned int err)
494 {
495 struct s5p_mfc_buf *src_buf;
496 struct s5p_mfc_dev *dev;
497 unsigned long flags;
498
499 if (ctx == NULL)
500 return;
501 dev = ctx->dev;
502 s5p_mfc_clear_int_flags(dev);
503 ctx->int_type = reason;
504 ctx->int_err = err;
505 ctx->int_cond = 1;
506 spin_lock(&dev->condlock);
507 clear_bit(ctx->num, &dev->ctx_work_bits);
508 spin_unlock(&dev->condlock);
509 if (err == 0) {
510 ctx->state = MFCINST_RUNNING;
511 if (!ctx->dpb_flush_flag) {
512 spin_lock_irqsave(&dev->irqlock, flags);
513 if (!list_empty(&ctx->src_queue)) {
514 src_buf = list_entry(ctx->src_queue.next,
515 struct s5p_mfc_buf, list);
516 list_del(&src_buf->list);
517 ctx->src_queue_cnt--;
518 vb2_buffer_done(src_buf->b,
519 VB2_BUF_STATE_DONE);
520 }
521 spin_unlock_irqrestore(&dev->irqlock, flags);
522 } else {
523 ctx->dpb_flush_flag = 0;
524 }
525 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
526 BUG();
527
528 s5p_mfc_clock_off();
529
530 wake_up(&ctx->queue);
531 s5p_mfc_try_run(dev);
532 } else {
533 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
534 BUG();
535
536 s5p_mfc_clock_off();
537
538 wake_up(&ctx->queue);
539 }
540 }
541
542 /* Interrupt processing */
543 static irqreturn_t s5p_mfc_irq(int irq, void *priv)
544 {
545 struct s5p_mfc_dev *dev = priv;
546 struct s5p_mfc_ctx *ctx;
547 unsigned int reason;
548 unsigned int err;
549
550 mfc_debug_enter();
551 /* Reset the timeout watchdog */
552 atomic_set(&dev->watchdog_cnt, 0);
553 ctx = dev->ctx[dev->curr_ctx];
554 /* Get the reason of interrupt and the error code */
555 reason = s5p_mfc_get_int_reason();
556 err = s5p_mfc_get_int_err();
557 mfc_debug(1, "Int reason: %d (err: %08x)\n", reason, err);
558 switch (reason) {
559 case S5P_FIMV_R2H_CMD_ERR_RET:
560 /* An error has occured */
561 if (ctx->state == MFCINST_RUNNING &&
562 s5p_mfc_err_dec(err) >= S5P_FIMV_ERR_WARNINGS_START)
563 s5p_mfc_handle_frame(ctx, reason, err);
564 else
565 s5p_mfc_handle_error(ctx, reason, err);
566 clear_bit(0, &dev->enter_suspend);
567 break;
568
569 case S5P_FIMV_R2H_CMD_SLICE_DONE_RET:
570 case S5P_FIMV_R2H_CMD_FRAME_DONE_RET:
571 if (ctx->c_ops->post_frame_start) {
572 if (ctx->c_ops->post_frame_start(ctx))
573 mfc_err("post_frame_start() failed\n");
574 s5p_mfc_clear_int_flags(dev);
575 wake_up_ctx(ctx, reason, err);
576 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
577 BUG();
578 s5p_mfc_clock_off();
579 s5p_mfc_try_run(dev);
580 } else {
581 s5p_mfc_handle_frame(ctx, reason, err);
582 }
583 break;
584
585 case S5P_FIMV_R2H_CMD_SEQ_DONE_RET:
586 s5p_mfc_handle_seq_done(ctx, reason, err);
587 break;
588
589 case S5P_FIMV_R2H_CMD_OPEN_INSTANCE_RET:
590 ctx->inst_no = s5p_mfc_get_inst_no();
591 ctx->state = MFCINST_GOT_INST;
592 clear_work_bit(ctx);
593 wake_up(&ctx->queue);
594 goto irq_cleanup_hw;
595
596 case S5P_FIMV_R2H_CMD_CLOSE_INSTANCE_RET:
597 clear_work_bit(ctx);
598 ctx->state = MFCINST_FREE;
599 wake_up(&ctx->queue);
600 goto irq_cleanup_hw;
601
602 case S5P_FIMV_R2H_CMD_SYS_INIT_RET:
603 case S5P_FIMV_R2H_CMD_FW_STATUS_RET:
604 case S5P_FIMV_R2H_CMD_SLEEP_RET:
605 case S5P_FIMV_R2H_CMD_WAKEUP_RET:
606 if (ctx)
607 clear_work_bit(ctx);
608 s5p_mfc_clear_int_flags(dev);
609 wake_up_dev(dev, reason, err);
610 clear_bit(0, &dev->hw_lock);
611 clear_bit(0, &dev->enter_suspend);
612 break;
613
614 case S5P_FIMV_R2H_CMD_INIT_BUFFERS_RET:
615 s5p_mfc_handle_init_buffers(ctx, reason, err);
616 break;
617 default:
618 mfc_debug(2, "Unknown int reason\n");
619 s5p_mfc_clear_int_flags(dev);
620 }
621 mfc_debug_leave();
622 return IRQ_HANDLED;
623 irq_cleanup_hw:
624 s5p_mfc_clear_int_flags(dev);
625 ctx->int_type = reason;
626 ctx->int_err = err;
627 ctx->int_cond = 1;
628 if (test_and_clear_bit(0, &dev->hw_lock) == 0)
629 mfc_err("Failed to unlock hw\n");
630
631 s5p_mfc_clock_off();
632
633 s5p_mfc_try_run(dev);
634 mfc_debug(2, "Exit via irq_cleanup_hw\n");
635 return IRQ_HANDLED;
636 }
637
638 /* Open an MFC node */
639 static int s5p_mfc_open(struct file *file)
640 {
641 struct s5p_mfc_dev *dev = video_drvdata(file);
642 struct s5p_mfc_ctx *ctx = NULL;
643 struct vb2_queue *q;
644 unsigned long flags;
645 int ret = 0;
646
647 mfc_debug_enter();
648 dev->num_inst++; /* It is guarded by mfc_mutex in vfd */
649 /* Allocate memory for context */
650 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
651 if (!ctx) {
652 mfc_err("Not enough memory\n");
653 ret = -ENOMEM;
654 goto err_alloc;
655 }
656 v4l2_fh_init(&ctx->fh, video_devdata(file));
657 file->private_data = &ctx->fh;
658 v4l2_fh_add(&ctx->fh);
659 ctx->dev = dev;
660 INIT_LIST_HEAD(&ctx->src_queue);
661 INIT_LIST_HEAD(&ctx->dst_queue);
662 ctx->src_queue_cnt = 0;
663 ctx->dst_queue_cnt = 0;
664 /* Get context number */
665 ctx->num = 0;
666 while (dev->ctx[ctx->num]) {
667 ctx->num++;
668 if (ctx->num >= MFC_NUM_CONTEXTS) {
669 mfc_err("Too many open contexts\n");
670 ret = -EBUSY;
671 goto err_no_ctx;
672 }
673 }
674 /* Mark context as idle */
675 spin_lock_irqsave(&dev->condlock, flags);
676 clear_bit(ctx->num, &dev->ctx_work_bits);
677 spin_unlock_irqrestore(&dev->condlock, flags);
678 dev->ctx[ctx->num] = ctx;
679 if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
680 ctx->type = MFCINST_DECODER;
681 ctx->c_ops = get_dec_codec_ops();
682 /* Setup ctrl handler */
683 ret = s5p_mfc_dec_ctrls_setup(ctx);
684 if (ret) {
685 mfc_err("Failed to setup mfc controls\n");
686 goto err_ctrls_setup;
687 }
688 } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
689 ctx->type = MFCINST_ENCODER;
690 ctx->c_ops = get_enc_codec_ops();
691 /* only for encoder */
692 INIT_LIST_HEAD(&ctx->ref_queue);
693 ctx->ref_queue_cnt = 0;
694 /* Setup ctrl handler */
695 ret = s5p_mfc_enc_ctrls_setup(ctx);
696 if (ret) {
697 mfc_err("Failed to setup mfc controls\n");
698 goto err_ctrls_setup;
699 }
700 } else {
701 ret = -ENOENT;
702 goto err_bad_node;
703 }
704 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
705 ctx->inst_no = -1;
706 /* Load firmware if this is the first instance */
707 if (dev->num_inst == 1) {
708 dev->watchdog_timer.expires = jiffies +
709 msecs_to_jiffies(MFC_WATCHDOG_INTERVAL);
710 add_timer(&dev->watchdog_timer);
711 ret = s5p_mfc_power_on();
712 if (ret < 0) {
713 mfc_err("power on failed\n");
714 goto err_pwr_enable;
715 }
716 s5p_mfc_clock_on();
717 ret = s5p_mfc_alloc_and_load_firmware(dev);
718 if (ret)
719 goto err_alloc_fw;
720 /* Init the FW */
721 ret = s5p_mfc_init_hw(dev);
722 if (ret)
723 goto err_init_hw;
724 s5p_mfc_clock_off();
725 }
726 /* Init videobuf2 queue for CAPTURE */
727 q = &ctx->vq_dst;
728 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
729 q->drv_priv = &ctx->fh;
730 if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
731 q->io_modes = VB2_MMAP;
732 q->ops = get_dec_queue_ops();
733 } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
734 q->io_modes = VB2_MMAP | VB2_USERPTR;
735 q->ops = get_enc_queue_ops();
736 } else {
737 ret = -ENOENT;
738 goto err_queue_init;
739 }
740 q->mem_ops = (struct vb2_mem_ops *)&vb2_dma_contig_memops;
741 ret = vb2_queue_init(q);
742 if (ret) {
743 mfc_err("Failed to initialize videobuf2 queue(capture)\n");
744 goto err_queue_init;
745 }
746 /* Init videobuf2 queue for OUTPUT */
747 q = &ctx->vq_src;
748 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
749 q->io_modes = VB2_MMAP;
750 q->drv_priv = &ctx->fh;
751 if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
752 q->io_modes = VB2_MMAP;
753 q->ops = get_dec_queue_ops();
754 } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
755 q->io_modes = VB2_MMAP | VB2_USERPTR;
756 q->ops = get_enc_queue_ops();
757 } else {
758 ret = -ENOENT;
759 goto err_queue_init;
760 }
761 q->mem_ops = (struct vb2_mem_ops *)&vb2_dma_contig_memops;
762 ret = vb2_queue_init(q);
763 if (ret) {
764 mfc_err("Failed to initialize videobuf2 queue(output)\n");
765 goto err_queue_init;
766 }
767 init_waitqueue_head(&ctx->queue);
768 mfc_debug_leave();
769 return ret;
770 /* Deinit when failure occured */
771 err_queue_init:
772 err_init_hw:
773 s5p_mfc_release_firmware(dev);
774 err_alloc_fw:
775 dev->ctx[ctx->num] = NULL;
776 del_timer_sync(&dev->watchdog_timer);
777 s5p_mfc_clock_off();
778 err_pwr_enable:
779 if (dev->num_inst == 1) {
780 if (s5p_mfc_power_off() < 0)
781 mfc_err("power off failed\n");
782 s5p_mfc_release_firmware(dev);
783 }
784 err_ctrls_setup:
785 s5p_mfc_dec_ctrls_delete(ctx);
786 err_bad_node:
787 err_no_ctx:
788 v4l2_fh_del(&ctx->fh);
789 v4l2_fh_exit(&ctx->fh);
790 kfree(ctx);
791 err_alloc:
792 dev->num_inst--;
793 mfc_debug_leave();
794 return ret;
795 }
796
797 /* Release MFC context */
798 static int s5p_mfc_release(struct file *file)
799 {
800 struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data);
801 struct s5p_mfc_dev *dev = ctx->dev;
802 unsigned long flags;
803
804 mfc_debug_enter();
805 s5p_mfc_clock_on();
806 vb2_queue_release(&ctx->vq_src);
807 vb2_queue_release(&ctx->vq_dst);
808 /* Mark context as idle */
809 spin_lock_irqsave(&dev->condlock, flags);
810 clear_bit(ctx->num, &dev->ctx_work_bits);
811 spin_unlock_irqrestore(&dev->condlock, flags);
812 /* If instance was initialised then
813 * return instance and free reosurces */
814 if (ctx->inst_no != MFC_NO_INSTANCE_SET) {
815 mfc_debug(2, "Has to free instance\n");
816 ctx->state = MFCINST_RETURN_INST;
817 spin_lock_irqsave(&dev->condlock, flags);
818 set_bit(ctx->num, &dev->ctx_work_bits);
819 spin_unlock_irqrestore(&dev->condlock, flags);
820 s5p_mfc_clean_ctx_int_flags(ctx);
821 s5p_mfc_try_run(dev);
822 /* Wait until instance is returned or timeout occured */
823 if (s5p_mfc_wait_for_done_ctx
824 (ctx, S5P_FIMV_R2H_CMD_CLOSE_INSTANCE_RET, 0)) {
825 s5p_mfc_clock_off();
826 mfc_err("Err returning instance\n");
827 }
828 mfc_debug(2, "After free instance\n");
829 /* Free resources */
830 s5p_mfc_release_codec_buffers(ctx);
831 s5p_mfc_release_instance_buffer(ctx);
832 if (ctx->type == MFCINST_DECODER)
833 s5p_mfc_release_dec_desc_buffer(ctx);
834
835 ctx->inst_no = MFC_NO_INSTANCE_SET;
836 }
837 /* hardware locking scheme */
838 if (dev->curr_ctx == ctx->num)
839 clear_bit(0, &dev->hw_lock);
840 dev->num_inst--;
841 if (dev->num_inst == 0) {
842 mfc_debug(2, "Last instance - release firmware\n");
843 /* reset <-> F/W release */
844 s5p_mfc_reset(dev);
845 s5p_mfc_release_firmware(dev);
846 del_timer_sync(&dev->watchdog_timer);
847 if (s5p_mfc_power_off() < 0)
848 mfc_err("Power off failed\n");
849 }
850 mfc_debug(2, "Shutting down clock\n");
851 s5p_mfc_clock_off();
852 dev->ctx[ctx->num] = NULL;
853 s5p_mfc_dec_ctrls_delete(ctx);
854 v4l2_fh_del(&ctx->fh);
855 v4l2_fh_exit(&ctx->fh);
856 kfree(ctx);
857 mfc_debug_leave();
858 return 0;
859 }
860
861 /* Poll */
862 static unsigned int s5p_mfc_poll(struct file *file,
863 struct poll_table_struct *wait)
864 {
865 struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data);
866 struct s5p_mfc_dev *dev = ctx->dev;
867 struct vb2_queue *src_q, *dst_q;
868 struct vb2_buffer *src_vb = NULL, *dst_vb = NULL;
869 unsigned int rc = 0;
870 unsigned long flags;
871
872 src_q = &ctx->vq_src;
873 dst_q = &ctx->vq_dst;
874 /*
875 * There has to be at least one buffer queued on each queued_list, which
876 * means either in driver already or waiting for driver to claim it
877 * and start processing.
878 */
879 if ((!src_q->streaming || list_empty(&src_q->queued_list))
880 && (!dst_q->streaming || list_empty(&dst_q->queued_list))) {
881 rc = POLLERR;
882 goto end;
883 }
884 mutex_unlock(&dev->mfc_mutex);
885 poll_wait(file, &src_q->done_wq, wait);
886 poll_wait(file, &dst_q->done_wq, wait);
887 mutex_lock(&dev->mfc_mutex);
888 spin_lock_irqsave(&src_q->done_lock, flags);
889 if (!list_empty(&src_q->done_list))
890 src_vb = list_first_entry(&src_q->done_list, struct vb2_buffer,
891 done_entry);
892 if (src_vb && (src_vb->state == VB2_BUF_STATE_DONE
893 || src_vb->state == VB2_BUF_STATE_ERROR))
894 rc |= POLLOUT | POLLWRNORM;
895 spin_unlock_irqrestore(&src_q->done_lock, flags);
896 spin_lock_irqsave(&dst_q->done_lock, flags);
897 if (!list_empty(&dst_q->done_list))
898 dst_vb = list_first_entry(&dst_q->done_list, struct vb2_buffer,
899 done_entry);
900 if (dst_vb && (dst_vb->state == VB2_BUF_STATE_DONE
901 || dst_vb->state == VB2_BUF_STATE_ERROR))
902 rc |= POLLIN | POLLRDNORM;
903 spin_unlock_irqrestore(&dst_q->done_lock, flags);
904 end:
905 return rc;
906 }
907
908 /* Mmap */
909 static int s5p_mfc_mmap(struct file *file, struct vm_area_struct *vma)
910 {
911 struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data);
912 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
913 int ret;
914 if (offset < DST_QUEUE_OFF_BASE) {
915 mfc_debug(2, "mmaping source\n");
916 ret = vb2_mmap(&ctx->vq_src, vma);
917 } else { /* capture */
918 mfc_debug(2, "mmaping destination\n");
919 vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
920 ret = vb2_mmap(&ctx->vq_dst, vma);
921 }
922 return ret;
923 }
924
925 /* v4l2 ops */
926 static const struct v4l2_file_operations s5p_mfc_fops = {
927 .owner = THIS_MODULE,
928 .open = s5p_mfc_open,
929 .release = s5p_mfc_release,
930 .poll = s5p_mfc_poll,
931 .unlocked_ioctl = video_ioctl2,
932 .mmap = s5p_mfc_mmap,
933 };
934
935 static int match_child(struct device *dev, void *data)
936 {
937 if (!dev_name(dev))
938 return 0;
939 return !strcmp(dev_name(dev), (char *)data);
940 }
941
942 /* MFC probe function */
943 static int s5p_mfc_probe(struct platform_device *pdev)
944 {
945 struct s5p_mfc_dev *dev;
946 struct video_device *vfd;
947 struct resource *res;
948 int ret;
949
950 pr_debug("%s++\n", __func__);
951 dev = devm_kzalloc(&pdev->dev, sizeof *dev, GFP_KERNEL);
952 if (!dev) {
953 dev_err(&pdev->dev, "Not enough memory for MFC device\n");
954 return -ENOMEM;
955 }
956
957 spin_lock_init(&dev->irqlock);
958 spin_lock_init(&dev->condlock);
959 dev->plat_dev = pdev;
960 if (!dev->plat_dev) {
961 dev_err(&pdev->dev, "No platform data specified\n");
962 return -ENODEV;
963 }
964
965 ret = s5p_mfc_init_pm(dev);
966 if (ret < 0) {
967 dev_err(&pdev->dev, "failed to get mfc clock source\n");
968 return ret;
969 }
970
971 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
972
973 dev->regs_base = devm_request_and_ioremap(&pdev->dev, res);
974 if (dev->regs_base == NULL) {
975 dev_err(&pdev->dev, "Failed to obtain io memory\n");
976 return -ENOENT;
977 }
978
979 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
980 if (res == NULL) {
981 dev_err(&pdev->dev, "failed to get irq resource\n");
982 ret = -ENOENT;
983 goto err_res;
984 }
985 dev->irq = res->start;
986 ret = devm_request_irq(&pdev->dev, dev->irq, s5p_mfc_irq,
987 IRQF_DISABLED, pdev->name, dev);
988 if (ret) {
989 dev_err(&pdev->dev, "Failed to install irq (%d)\n", ret);
990 goto err_res;
991 }
992
993 dev->mem_dev_l = device_find_child(&dev->plat_dev->dev, "s5p-mfc-l",
994 match_child);
995 if (!dev->mem_dev_l) {
996 mfc_err("Mem child (L) device get failed\n");
997 ret = -ENODEV;
998 goto err_res;
999 }
1000 dev->mem_dev_r = device_find_child(&dev->plat_dev->dev, "s5p-mfc-r",
1001 match_child);
1002 if (!dev->mem_dev_r) {
1003 mfc_err("Mem child (R) device get failed\n");
1004 ret = -ENODEV;
1005 goto err_res;
1006 }
1007
1008 dev->alloc_ctx[0] = vb2_dma_contig_init_ctx(dev->mem_dev_l);
1009 if (IS_ERR_OR_NULL(dev->alloc_ctx[0])) {
1010 ret = PTR_ERR(dev->alloc_ctx[0]);
1011 goto err_res;
1012 }
1013 dev->alloc_ctx[1] = vb2_dma_contig_init_ctx(dev->mem_dev_r);
1014 if (IS_ERR_OR_NULL(dev->alloc_ctx[1])) {
1015 ret = PTR_ERR(dev->alloc_ctx[1]);
1016 goto err_mem_init_ctx_1;
1017 }
1018
1019 mutex_init(&dev->mfc_mutex);
1020
1021 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1022 if (ret)
1023 goto err_v4l2_dev_reg;
1024 init_waitqueue_head(&dev->queue);
1025
1026 /* decoder */
1027 vfd = video_device_alloc();
1028 if (!vfd) {
1029 v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
1030 ret = -ENOMEM;
1031 goto err_dec_alloc;
1032 }
1033 vfd->fops = &s5p_mfc_fops,
1034 vfd->ioctl_ops = get_dec_v4l2_ioctl_ops();
1035 vfd->release = video_device_release,
1036 vfd->lock = &dev->mfc_mutex;
1037 /* Locking in file operations other than ioctl should be done
1038 by the driver, not the V4L2 core.
1039 This driver needs auditing so that this flag can be removed. */
1040 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
1041 vfd->v4l2_dev = &dev->v4l2_dev;
1042 snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_DEC_NAME);
1043 dev->vfd_dec = vfd;
1044 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1045 if (ret) {
1046 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1047 video_device_release(vfd);
1048 goto err_dec_reg;
1049 }
1050 v4l2_info(&dev->v4l2_dev,
1051 "decoder registered as /dev/video%d\n", vfd->num);
1052 video_set_drvdata(vfd, dev);
1053
1054 /* encoder */
1055 vfd = video_device_alloc();
1056 if (!vfd) {
1057 v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
1058 ret = -ENOMEM;
1059 goto err_enc_alloc;
1060 }
1061 vfd->fops = &s5p_mfc_fops,
1062 vfd->ioctl_ops = get_enc_v4l2_ioctl_ops();
1063 vfd->release = video_device_release,
1064 vfd->lock = &dev->mfc_mutex;
1065 /* This should not be necessary */
1066 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
1067 vfd->v4l2_dev = &dev->v4l2_dev;
1068 snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_ENC_NAME);
1069 dev->vfd_enc = vfd;
1070 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1071 if (ret) {
1072 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1073 video_device_release(vfd);
1074 goto err_enc_reg;
1075 }
1076 v4l2_info(&dev->v4l2_dev,
1077 "encoder registered as /dev/video%d\n", vfd->num);
1078 video_set_drvdata(vfd, dev);
1079 platform_set_drvdata(pdev, dev);
1080
1081 dev->hw_lock = 0;
1082 dev->watchdog_workqueue = create_singlethread_workqueue(S5P_MFC_NAME);
1083 INIT_WORK(&dev->watchdog_work, s5p_mfc_watchdog_worker);
1084 atomic_set(&dev->watchdog_cnt, 0);
1085 init_timer(&dev->watchdog_timer);
1086 dev->watchdog_timer.data = (unsigned long)dev;
1087 dev->watchdog_timer.function = s5p_mfc_watchdog;
1088
1089 pr_debug("%s--\n", __func__);
1090 return 0;
1091
1092 /* Deinit MFC if probe had failed */
1093 err_enc_reg:
1094 video_device_release(dev->vfd_enc);
1095 err_enc_alloc:
1096 video_unregister_device(dev->vfd_dec);
1097 err_dec_reg:
1098 video_device_release(dev->vfd_dec);
1099 err_dec_alloc:
1100 v4l2_device_unregister(&dev->v4l2_dev);
1101 err_v4l2_dev_reg:
1102 vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[1]);
1103 err_mem_init_ctx_1:
1104 vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]);
1105 err_res:
1106 s5p_mfc_final_pm(dev);
1107
1108 pr_debug("%s-- with error\n", __func__);
1109 return ret;
1110
1111 }
1112
1113 /* Remove the driver */
1114 static int __devexit s5p_mfc_remove(struct platform_device *pdev)
1115 {
1116 struct s5p_mfc_dev *dev = platform_get_drvdata(pdev);
1117
1118 v4l2_info(&dev->v4l2_dev, "Removing %s\n", pdev->name);
1119
1120 del_timer_sync(&dev->watchdog_timer);
1121 flush_workqueue(dev->watchdog_workqueue);
1122 destroy_workqueue(dev->watchdog_workqueue);
1123
1124 video_unregister_device(dev->vfd_enc);
1125 video_unregister_device(dev->vfd_dec);
1126 v4l2_device_unregister(&dev->v4l2_dev);
1127 vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]);
1128 vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[1]);
1129
1130 s5p_mfc_final_pm(dev);
1131 return 0;
1132 }
1133
1134 #ifdef CONFIG_PM_SLEEP
1135
1136 static int s5p_mfc_suspend(struct device *dev)
1137 {
1138 struct platform_device *pdev = to_platform_device(dev);
1139 struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);
1140 int ret;
1141
1142 if (m_dev->num_inst == 0)
1143 return 0;
1144 return s5p_mfc_sleep(m_dev);
1145 if (test_and_set_bit(0, &m_dev->enter_suspend) != 0) {
1146 mfc_err("Error: going to suspend for a second time\n");
1147 return -EIO;
1148 }
1149
1150 /* Check if we're processing then wait if it necessary. */
1151 while (test_and_set_bit(0, &m_dev->hw_lock) != 0) {
1152 /* Try and lock the HW */
1153 /* Wait on the interrupt waitqueue */
1154 ret = wait_event_interruptible_timeout(m_dev->queue,
1155 m_dev->int_cond || m_dev->ctx[m_dev->curr_ctx]->int_cond,
1156 msecs_to_jiffies(MFC_INT_TIMEOUT));
1157
1158 if (ret == 0) {
1159 mfc_err("Waiting for hardware to finish timed out\n");
1160 return -EIO;
1161 }
1162 }
1163 return 0;
1164 }
1165
1166 static int s5p_mfc_resume(struct device *dev)
1167 {
1168 struct platform_device *pdev = to_platform_device(dev);
1169 struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);
1170
1171 if (m_dev->num_inst == 0)
1172 return 0;
1173 return s5p_mfc_wakeup(m_dev);
1174 }
1175 #endif
1176
1177 #ifdef CONFIG_PM_RUNTIME
1178 static int s5p_mfc_runtime_suspend(struct device *dev)
1179 {
1180 struct platform_device *pdev = to_platform_device(dev);
1181 struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);
1182
1183 atomic_set(&m_dev->pm.power, 0);
1184 return 0;
1185 }
1186
1187 static int s5p_mfc_runtime_resume(struct device *dev)
1188 {
1189 struct platform_device *pdev = to_platform_device(dev);
1190 struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);
1191 int pre_power;
1192
1193 if (!m_dev->alloc_ctx)
1194 return 0;
1195 pre_power = atomic_read(&m_dev->pm.power);
1196 atomic_set(&m_dev->pm.power, 1);
1197 return 0;
1198 }
1199 #endif
1200
1201 /* Power management */
1202 static const struct dev_pm_ops s5p_mfc_pm_ops = {
1203 SET_SYSTEM_SLEEP_PM_OPS(s5p_mfc_suspend, s5p_mfc_resume)
1204 SET_RUNTIME_PM_OPS(s5p_mfc_runtime_suspend, s5p_mfc_runtime_resume,
1205 NULL)
1206 };
1207
1208 static struct platform_driver s5p_mfc_driver = {
1209 .probe = s5p_mfc_probe,
1210 .remove = __devexit_p(s5p_mfc_remove),
1211 .driver = {
1212 .name = S5P_MFC_NAME,
1213 .owner = THIS_MODULE,
1214 .pm = &s5p_mfc_pm_ops
1215 },
1216 };
1217
1218 module_platform_driver(s5p_mfc_driver);
1219
1220 MODULE_LICENSE("GPL");
1221 MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
1222 MODULE_DESCRIPTION("Samsung S5P Multi Format Codec V4L2 driver");
1223
Linux kernel - Deliverables
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