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[media] v4l: Rename vb2_queue.timestamp_type as timestamp_flags
[deliverable/linux.git] / drivers / media / platform / mx2_emmaprp.c
1 /*
2 * Support eMMa-PrP through mem2mem framework.
3 *
4 * eMMa-PrP is a piece of HW that allows fetching buffers
5 * from one memory location and do several operations on
6 * them such as scaling or format conversion giving, as a result
7 * a new processed buffer in another memory location.
8 *
9 * Based on mem2mem_testdev.c by Pawel Osciak.
10 *
11 * Copyright (c) 2011 Vista Silicon S.L.
12 * Javier Martin <javier.martin@vista-silicon.com>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version
18 */
19 #include <linux/module.h>
20 #include <linux/clk.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/io.h>
24
25 #include <linux/platform_device.h>
26 #include <media/v4l2-mem2mem.h>
27 #include <media/v4l2-device.h>
28 #include <media/v4l2-ioctl.h>
29 #include <media/videobuf2-dma-contig.h>
30 #include <asm/sizes.h>
31
32 #define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
33
34 MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
35 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
36 MODULE_LICENSE("GPL");
37 MODULE_VERSION("0.0.1");
38
39 static bool debug;
40 module_param(debug, bool, 0644);
41
42 #define MIN_W 32
43 #define MIN_H 32
44 #define MAX_W 2040
45 #define MAX_H 2046
46
47 #define S_ALIGN 1 /* multiple of 2 */
48 #define W_ALIGN_YUV420 3 /* multiple of 8 */
49 #define W_ALIGN_OTHERS 2 /* multiple of 4 */
50 #define H_ALIGN 1 /* multiple of 2 */
51
52 /* Flags that indicate a format can be used for capture/output */
53 #define MEM2MEM_CAPTURE (1 << 0)
54 #define MEM2MEM_OUTPUT (1 << 1)
55
56 #define MEM2MEM_NAME "m2m-emmaprp"
57
58 /* In bytes, per queue */
59 #define MEM2MEM_VID_MEM_LIMIT SZ_16M
60
61 #define dprintk(dev, fmt, arg...) \
62 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
63
64 /* EMMA PrP */
65 #define PRP_CNTL 0x00
66 #define PRP_INTR_CNTL 0x04
67 #define PRP_INTRSTATUS 0x08
68 #define PRP_SOURCE_Y_PTR 0x0c
69 #define PRP_SOURCE_CB_PTR 0x10
70 #define PRP_SOURCE_CR_PTR 0x14
71 #define PRP_DEST_RGB1_PTR 0x18
72 #define PRP_DEST_RGB2_PTR 0x1c
73 #define PRP_DEST_Y_PTR 0x20
74 #define PRP_DEST_CB_PTR 0x24
75 #define PRP_DEST_CR_PTR 0x28
76 #define PRP_SRC_FRAME_SIZE 0x2c
77 #define PRP_DEST_CH1_LINE_STRIDE 0x30
78 #define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
79 #define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
80 #define PRP_CH1_OUT_IMAGE_SIZE 0x3c
81 #define PRP_CH2_OUT_IMAGE_SIZE 0x40
82 #define PRP_SRC_LINE_STRIDE 0x44
83 #define PRP_CSC_COEF_012 0x48
84 #define PRP_CSC_COEF_345 0x4c
85 #define PRP_CSC_COEF_678 0x50
86 #define PRP_CH1_RZ_HORI_COEF1 0x54
87 #define PRP_CH1_RZ_HORI_COEF2 0x58
88 #define PRP_CH1_RZ_HORI_VALID 0x5c
89 #define PRP_CH1_RZ_VERT_COEF1 0x60
90 #define PRP_CH1_RZ_VERT_COEF2 0x64
91 #define PRP_CH1_RZ_VERT_VALID 0x68
92 #define PRP_CH2_RZ_HORI_COEF1 0x6c
93 #define PRP_CH2_RZ_HORI_COEF2 0x70
94 #define PRP_CH2_RZ_HORI_VALID 0x74
95 #define PRP_CH2_RZ_VERT_COEF1 0x78
96 #define PRP_CH2_RZ_VERT_COEF2 0x7c
97 #define PRP_CH2_RZ_VERT_VALID 0x80
98
99 #define PRP_CNTL_CH1EN (1 << 0)
100 #define PRP_CNTL_CH2EN (1 << 1)
101 #define PRP_CNTL_CSIEN (1 << 2)
102 #define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
103 #define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
104 #define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
105 #define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
106 #define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
107 #define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
108 #define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
109 #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
110 #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
111 #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
112 #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
113 #define PRP_CNTL_CH1_LEN (1 << 9)
114 #define PRP_CNTL_CH2_LEN (1 << 10)
115 #define PRP_CNTL_SKIP_FRAME (1 << 11)
116 #define PRP_CNTL_SWRST (1 << 12)
117 #define PRP_CNTL_CLKEN (1 << 13)
118 #define PRP_CNTL_WEN (1 << 14)
119 #define PRP_CNTL_CH1BYP (1 << 15)
120 #define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
121 #define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
122 #define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
123 #define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
124 #define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
125 #define PRP_CNTL_CH2B1EN (1 << 29)
126 #define PRP_CNTL_CH2B2EN (1 << 30)
127 #define PRP_CNTL_CH2FEN (1 << 31)
128
129 #define PRP_SIZE_HEIGHT(x) (x)
130 #define PRP_SIZE_WIDTH(x) ((x) << 16)
131
132 /* IRQ Enable and status register */
133 #define PRP_INTR_RDERR (1 << 0)
134 #define PRP_INTR_CH1WERR (1 << 1)
135 #define PRP_INTR_CH2WERR (1 << 2)
136 #define PRP_INTR_CH1FC (1 << 3)
137 #define PRP_INTR_CH2FC (1 << 5)
138 #define PRP_INTR_LBOVF (1 << 7)
139 #define PRP_INTR_CH2OVF (1 << 8)
140
141 #define PRP_INTR_ST_RDERR (1 << 0)
142 #define PRP_INTR_ST_CH1WERR (1 << 1)
143 #define PRP_INTR_ST_CH2WERR (1 << 2)
144 #define PRP_INTR_ST_CH2B2CI (1 << 3)
145 #define PRP_INTR_ST_CH2B1CI (1 << 4)
146 #define PRP_INTR_ST_CH1B2CI (1 << 5)
147 #define PRP_INTR_ST_CH1B1CI (1 << 6)
148 #define PRP_INTR_ST_LBOVF (1 << 7)
149 #define PRP_INTR_ST_CH2OVF (1 << 8)
150
151 struct emmaprp_fmt {
152 char *name;
153 u32 fourcc;
154 /* Types the format can be used for */
155 u32 types;
156 };
157
158 static struct emmaprp_fmt formats[] = {
159 {
160 .name = "YUV 4:2:0 Planar",
161 .fourcc = V4L2_PIX_FMT_YUV420,
162 .types = MEM2MEM_CAPTURE,
163 },
164 {
165 .name = "4:2:2, packed, YUYV",
166 .fourcc = V4L2_PIX_FMT_YUYV,
167 .types = MEM2MEM_OUTPUT,
168 },
169 };
170
171 /* Per-queue, driver-specific private data */
172 struct emmaprp_q_data {
173 unsigned int width;
174 unsigned int height;
175 unsigned int sizeimage;
176 struct emmaprp_fmt *fmt;
177 };
178
179 enum {
180 V4L2_M2M_SRC = 0,
181 V4L2_M2M_DST = 1,
182 };
183
184 #define NUM_FORMATS ARRAY_SIZE(formats)
185
186 static struct emmaprp_fmt *find_format(struct v4l2_format *f)
187 {
188 struct emmaprp_fmt *fmt;
189 unsigned int k;
190
191 for (k = 0; k < NUM_FORMATS; k++) {
192 fmt = &formats[k];
193 if (fmt->fourcc == f->fmt.pix.pixelformat)
194 break;
195 }
196
197 if (k == NUM_FORMATS)
198 return NULL;
199
200 return &formats[k];
201 }
202
203 struct emmaprp_dev {
204 struct v4l2_device v4l2_dev;
205 struct video_device *vfd;
206
207 struct mutex dev_mutex;
208 spinlock_t irqlock;
209
210 int irq_emma;
211 void __iomem *base_emma;
212 struct clk *clk_emma_ahb, *clk_emma_ipg;
213 struct resource *res_emma;
214
215 struct v4l2_m2m_dev *m2m_dev;
216 struct vb2_alloc_ctx *alloc_ctx;
217 };
218
219 struct emmaprp_ctx {
220 struct emmaprp_dev *dev;
221 /* Abort requested by m2m */
222 int aborting;
223 struct emmaprp_q_data q_data[2];
224 struct v4l2_m2m_ctx *m2m_ctx;
225 };
226
227 static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
228 enum v4l2_buf_type type)
229 {
230 switch (type) {
231 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
232 return &(ctx->q_data[V4L2_M2M_SRC]);
233 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
234 return &(ctx->q_data[V4L2_M2M_DST]);
235 default:
236 BUG();
237 }
238 return NULL;
239 }
240
241 /*
242 * mem2mem callbacks
243 */
244 static void emmaprp_job_abort(void *priv)
245 {
246 struct emmaprp_ctx *ctx = priv;
247 struct emmaprp_dev *pcdev = ctx->dev;
248
249 ctx->aborting = 1;
250
251 dprintk(pcdev, "Aborting task\n");
252
253 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
254 }
255
256 static void emmaprp_lock(void *priv)
257 {
258 struct emmaprp_ctx *ctx = priv;
259 struct emmaprp_dev *pcdev = ctx->dev;
260 mutex_lock(&pcdev->dev_mutex);
261 }
262
263 static void emmaprp_unlock(void *priv)
264 {
265 struct emmaprp_ctx *ctx = priv;
266 struct emmaprp_dev *pcdev = ctx->dev;
267 mutex_unlock(&pcdev->dev_mutex);
268 }
269
270 static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
271 {
272 dprintk(pcdev,
273 "eMMa-PrP Registers:\n"
274 " SOURCE_Y_PTR = 0x%08X\n"
275 " SRC_FRAME_SIZE = 0x%08X\n"
276 " DEST_Y_PTR = 0x%08X\n"
277 " DEST_CR_PTR = 0x%08X\n"
278 " DEST_CB_PTR = 0x%08X\n"
279 " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
280 " CNTL = 0x%08X\n",
281 readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
282 readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
283 readl(pcdev->base_emma + PRP_DEST_Y_PTR),
284 readl(pcdev->base_emma + PRP_DEST_CR_PTR),
285 readl(pcdev->base_emma + PRP_DEST_CB_PTR),
286 readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
287 readl(pcdev->base_emma + PRP_CNTL));
288 }
289
290 static void emmaprp_device_run(void *priv)
291 {
292 struct emmaprp_ctx *ctx = priv;
293 struct emmaprp_q_data *s_q_data, *d_q_data;
294 struct vb2_buffer *src_buf, *dst_buf;
295 struct emmaprp_dev *pcdev = ctx->dev;
296 unsigned int s_width, s_height;
297 unsigned int d_width, d_height;
298 unsigned int d_size;
299 dma_addr_t p_in, p_out;
300 u32 tmp;
301
302 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
303 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
304
305 s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
306 s_width = s_q_data->width;
307 s_height = s_q_data->height;
308
309 d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
310 d_width = d_q_data->width;
311 d_height = d_q_data->height;
312 d_size = d_width * d_height;
313
314 p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
315 p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
316 if (!p_in || !p_out) {
317 v4l2_err(&pcdev->v4l2_dev,
318 "Acquiring kernel pointers to buffers failed\n");
319 return;
320 }
321
322 /* Input frame parameters */
323 writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
324 writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
325 pcdev->base_emma + PRP_SRC_FRAME_SIZE);
326
327 /* Output frame parameters */
328 writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
329 writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
330 writel(p_out + d_size + (d_size >> 2),
331 pcdev->base_emma + PRP_DEST_CR_PTR);
332 writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
333 pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
334
335 /* IRQ configuration */
336 tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
337 writel(tmp | PRP_INTR_RDERR |
338 PRP_INTR_CH2WERR |
339 PRP_INTR_CH2FC,
340 pcdev->base_emma + PRP_INTR_CNTL);
341
342 emmaprp_dump_regs(pcdev);
343
344 /* Enable transfer */
345 tmp = readl(pcdev->base_emma + PRP_CNTL);
346 writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
347 PRP_CNTL_DATA_IN_YUV422 |
348 PRP_CNTL_CH2EN,
349 pcdev->base_emma + PRP_CNTL);
350 }
351
352 static irqreturn_t emmaprp_irq(int irq_emma, void *data)
353 {
354 struct emmaprp_dev *pcdev = data;
355 struct emmaprp_ctx *curr_ctx;
356 struct vb2_buffer *src_vb, *dst_vb;
357 unsigned long flags;
358 u32 irqst;
359
360 /* Check irq flags and clear irq */
361 irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
362 writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
363 dprintk(pcdev, "irqst = 0x%08x\n", irqst);
364
365 curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
366 if (curr_ctx == NULL) {
367 pr_err("Instance released before the end of transaction\n");
368 return IRQ_HANDLED;
369 }
370
371 if (!curr_ctx->aborting) {
372 if ((irqst & PRP_INTR_ST_RDERR) ||
373 (irqst & PRP_INTR_ST_CH2WERR)) {
374 pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
375 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
376 } else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
377 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
378 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
379
380 src_vb->v4l2_buf.timestamp = dst_vb->v4l2_buf.timestamp;
381 src_vb->v4l2_buf.timecode = dst_vb->v4l2_buf.timecode;
382
383 spin_lock_irqsave(&pcdev->irqlock, flags);
384 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
385 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
386 spin_unlock_irqrestore(&pcdev->irqlock, flags);
387 }
388 }
389
390 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
391 return IRQ_HANDLED;
392 }
393
394 /*
395 * video ioctls
396 */
397 static int vidioc_querycap(struct file *file, void *priv,
398 struct v4l2_capability *cap)
399 {
400 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
401 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
402 /*
403 * This is only a mem-to-mem video device. The capture and output
404 * device capability flags are left only for backward compatibility
405 * and are scheduled for removal.
406 */
407 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
408 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
409 return 0;
410 }
411
412 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
413 {
414 int i, num;
415 struct emmaprp_fmt *fmt;
416
417 num = 0;
418
419 for (i = 0; i < NUM_FORMATS; ++i) {
420 if (formats[i].types & type) {
421 /* index-th format of type type found ? */
422 if (num == f->index)
423 break;
424 /* Correct type but haven't reached our index yet,
425 * just increment per-type index */
426 ++num;
427 }
428 }
429
430 if (i < NUM_FORMATS) {
431 /* Format found */
432 fmt = &formats[i];
433 strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
434 f->pixelformat = fmt->fourcc;
435 return 0;
436 }
437
438 /* Format not found */
439 return -EINVAL;
440 }
441
442 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
443 struct v4l2_fmtdesc *f)
444 {
445 return enum_fmt(f, MEM2MEM_CAPTURE);
446 }
447
448 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
449 struct v4l2_fmtdesc *f)
450 {
451 return enum_fmt(f, MEM2MEM_OUTPUT);
452 }
453
454 static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
455 {
456 struct vb2_queue *vq;
457 struct emmaprp_q_data *q_data;
458
459 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
460 if (!vq)
461 return -EINVAL;
462
463 q_data = get_q_data(ctx, f->type);
464
465 f->fmt.pix.width = q_data->width;
466 f->fmt.pix.height = q_data->height;
467 f->fmt.pix.field = V4L2_FIELD_NONE;
468 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
469 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
470 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
471 else /* YUYV */
472 f->fmt.pix.bytesperline = q_data->width * 2;
473 f->fmt.pix.sizeimage = q_data->sizeimage;
474
475 return 0;
476 }
477
478 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
479 struct v4l2_format *f)
480 {
481 return vidioc_g_fmt(priv, f);
482 }
483
484 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
485 struct v4l2_format *f)
486 {
487 return vidioc_g_fmt(priv, f);
488 }
489
490 static int vidioc_try_fmt(struct v4l2_format *f)
491 {
492 enum v4l2_field field;
493
494
495 if (!find_format(f))
496 return -EINVAL;
497
498 field = f->fmt.pix.field;
499 if (field == V4L2_FIELD_ANY)
500 field = V4L2_FIELD_NONE;
501 else if (V4L2_FIELD_NONE != field)
502 return -EINVAL;
503
504 /* V4L2 specification suggests the driver corrects the format struct
505 * if any of the dimensions is unsupported */
506 f->fmt.pix.field = field;
507
508 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
509 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
510 W_ALIGN_YUV420, &f->fmt.pix.height,
511 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
512 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
513 } else {
514 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
515 W_ALIGN_OTHERS, &f->fmt.pix.height,
516 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
517 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
518 }
519 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
520
521 return 0;
522 }
523
524 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
525 struct v4l2_format *f)
526 {
527 struct emmaprp_fmt *fmt;
528 struct emmaprp_ctx *ctx = priv;
529
530 fmt = find_format(f);
531 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
532 v4l2_err(&ctx->dev->v4l2_dev,
533 "Fourcc format (0x%08x) invalid.\n",
534 f->fmt.pix.pixelformat);
535 return -EINVAL;
536 }
537
538 return vidioc_try_fmt(f);
539 }
540
541 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
542 struct v4l2_format *f)
543 {
544 struct emmaprp_fmt *fmt;
545 struct emmaprp_ctx *ctx = priv;
546
547 fmt = find_format(f);
548 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
549 v4l2_err(&ctx->dev->v4l2_dev,
550 "Fourcc format (0x%08x) invalid.\n",
551 f->fmt.pix.pixelformat);
552 return -EINVAL;
553 }
554
555 return vidioc_try_fmt(f);
556 }
557
558 static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
559 {
560 struct emmaprp_q_data *q_data;
561 struct vb2_queue *vq;
562 int ret;
563
564 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
565 if (!vq)
566 return -EINVAL;
567
568 q_data = get_q_data(ctx, f->type);
569 if (!q_data)
570 return -EINVAL;
571
572 if (vb2_is_busy(vq)) {
573 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
574 return -EBUSY;
575 }
576
577 ret = vidioc_try_fmt(f);
578 if (ret)
579 return ret;
580
581 q_data->fmt = find_format(f);
582 q_data->width = f->fmt.pix.width;
583 q_data->height = f->fmt.pix.height;
584 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
585 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
586 else /* YUYV */
587 q_data->sizeimage = q_data->width * q_data->height * 2;
588
589 dprintk(ctx->dev,
590 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
591 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
592
593 return 0;
594 }
595
596 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
597 struct v4l2_format *f)
598 {
599 int ret;
600
601 ret = vidioc_try_fmt_vid_cap(file, priv, f);
602 if (ret)
603 return ret;
604
605 return vidioc_s_fmt(priv, f);
606 }
607
608 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
609 struct v4l2_format *f)
610 {
611 int ret;
612
613 ret = vidioc_try_fmt_vid_out(file, priv, f);
614 if (ret)
615 return ret;
616
617 return vidioc_s_fmt(priv, f);
618 }
619
620 static int vidioc_reqbufs(struct file *file, void *priv,
621 struct v4l2_requestbuffers *reqbufs)
622 {
623 struct emmaprp_ctx *ctx = priv;
624
625 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
626 }
627
628 static int vidioc_querybuf(struct file *file, void *priv,
629 struct v4l2_buffer *buf)
630 {
631 struct emmaprp_ctx *ctx = priv;
632
633 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
634 }
635
636 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
637 {
638 struct emmaprp_ctx *ctx = priv;
639
640 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
641 }
642
643 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
644 {
645 struct emmaprp_ctx *ctx = priv;
646
647 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
648 }
649
650 static int vidioc_streamon(struct file *file, void *priv,
651 enum v4l2_buf_type type)
652 {
653 struct emmaprp_ctx *ctx = priv;
654
655 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
656 }
657
658 static int vidioc_streamoff(struct file *file, void *priv,
659 enum v4l2_buf_type type)
660 {
661 struct emmaprp_ctx *ctx = priv;
662
663 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
664 }
665
666 static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
667 .vidioc_querycap = vidioc_querycap,
668
669 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
670 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
671 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
672 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
673
674 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
675 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
676 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
677 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
678
679 .vidioc_reqbufs = vidioc_reqbufs,
680 .vidioc_querybuf = vidioc_querybuf,
681
682 .vidioc_qbuf = vidioc_qbuf,
683 .vidioc_dqbuf = vidioc_dqbuf,
684
685 .vidioc_streamon = vidioc_streamon,
686 .vidioc_streamoff = vidioc_streamoff,
687 };
688
689
690 /*
691 * Queue operations
692 */
693 static int emmaprp_queue_setup(struct vb2_queue *vq,
694 const struct v4l2_format *fmt,
695 unsigned int *nbuffers, unsigned int *nplanes,
696 unsigned int sizes[], void *alloc_ctxs[])
697 {
698 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
699 struct emmaprp_q_data *q_data;
700 unsigned int size, count = *nbuffers;
701
702 q_data = get_q_data(ctx, vq->type);
703
704 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
705 size = q_data->width * q_data->height * 3 / 2;
706 else
707 size = q_data->width * q_data->height * 2;
708
709 while (size * count > MEM2MEM_VID_MEM_LIMIT)
710 (count)--;
711
712 *nplanes = 1;
713 *nbuffers = count;
714 sizes[0] = size;
715
716 alloc_ctxs[0] = ctx->dev->alloc_ctx;
717
718 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
719
720 return 0;
721 }
722
723 static int emmaprp_buf_prepare(struct vb2_buffer *vb)
724 {
725 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
726 struct emmaprp_q_data *q_data;
727
728 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
729
730 q_data = get_q_data(ctx, vb->vb2_queue->type);
731
732 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
733 dprintk(ctx->dev, "%s data will not fit into plane"
734 "(%lu < %lu)\n", __func__,
735 vb2_plane_size(vb, 0),
736 (long)q_data->sizeimage);
737 return -EINVAL;
738 }
739
740 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
741
742 return 0;
743 }
744
745 static void emmaprp_buf_queue(struct vb2_buffer *vb)
746 {
747 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
748 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
749 }
750
751 static struct vb2_ops emmaprp_qops = {
752 .queue_setup = emmaprp_queue_setup,
753 .buf_prepare = emmaprp_buf_prepare,
754 .buf_queue = emmaprp_buf_queue,
755 };
756
757 static int queue_init(void *priv, struct vb2_queue *src_vq,
758 struct vb2_queue *dst_vq)
759 {
760 struct emmaprp_ctx *ctx = priv;
761 int ret;
762
763 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
764 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
765 src_vq->drv_priv = ctx;
766 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
767 src_vq->ops = &emmaprp_qops;
768 src_vq->mem_ops = &vb2_dma_contig_memops;
769 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
770
771 ret = vb2_queue_init(src_vq);
772 if (ret)
773 return ret;
774
775 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
776 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
777 dst_vq->drv_priv = ctx;
778 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
779 dst_vq->ops = &emmaprp_qops;
780 dst_vq->mem_ops = &vb2_dma_contig_memops;
781 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
782
783 return vb2_queue_init(dst_vq);
784 }
785
786 /*
787 * File operations
788 */
789 static int emmaprp_open(struct file *file)
790 {
791 struct emmaprp_dev *pcdev = video_drvdata(file);
792 struct emmaprp_ctx *ctx;
793
794 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
795 if (!ctx)
796 return -ENOMEM;
797
798 file->private_data = ctx;
799 ctx->dev = pcdev;
800
801 if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
802 kfree(ctx);
803 return -ERESTARTSYS;
804 }
805
806 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
807
808 if (IS_ERR(ctx->m2m_ctx)) {
809 int ret = PTR_ERR(ctx->m2m_ctx);
810
811 mutex_unlock(&pcdev->dev_mutex);
812 kfree(ctx);
813 return ret;
814 }
815
816 clk_prepare_enable(pcdev->clk_emma_ipg);
817 clk_prepare_enable(pcdev->clk_emma_ahb);
818 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
819 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
820 mutex_unlock(&pcdev->dev_mutex);
821
822 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
823
824 return 0;
825 }
826
827 static int emmaprp_release(struct file *file)
828 {
829 struct emmaprp_dev *pcdev = video_drvdata(file);
830 struct emmaprp_ctx *ctx = file->private_data;
831
832 dprintk(pcdev, "Releasing instance %p\n", ctx);
833
834 mutex_lock(&pcdev->dev_mutex);
835 clk_disable_unprepare(pcdev->clk_emma_ahb);
836 clk_disable_unprepare(pcdev->clk_emma_ipg);
837 v4l2_m2m_ctx_release(ctx->m2m_ctx);
838 mutex_unlock(&pcdev->dev_mutex);
839 kfree(ctx);
840
841 return 0;
842 }
843
844 static unsigned int emmaprp_poll(struct file *file,
845 struct poll_table_struct *wait)
846 {
847 struct emmaprp_dev *pcdev = video_drvdata(file);
848 struct emmaprp_ctx *ctx = file->private_data;
849 unsigned int res;
850
851 mutex_lock(&pcdev->dev_mutex);
852 res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
853 mutex_unlock(&pcdev->dev_mutex);
854 return res;
855 }
856
857 static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
858 {
859 struct emmaprp_dev *pcdev = video_drvdata(file);
860 struct emmaprp_ctx *ctx = file->private_data;
861 int ret;
862
863 if (mutex_lock_interruptible(&pcdev->dev_mutex))
864 return -ERESTARTSYS;
865 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
866 mutex_unlock(&pcdev->dev_mutex);
867 return ret;
868 }
869
870 static const struct v4l2_file_operations emmaprp_fops = {
871 .owner = THIS_MODULE,
872 .open = emmaprp_open,
873 .release = emmaprp_release,
874 .poll = emmaprp_poll,
875 .unlocked_ioctl = video_ioctl2,
876 .mmap = emmaprp_mmap,
877 };
878
879 static struct video_device emmaprp_videodev = {
880 .name = MEM2MEM_NAME,
881 .fops = &emmaprp_fops,
882 .ioctl_ops = &emmaprp_ioctl_ops,
883 .minor = -1,
884 .release = video_device_release,
885 .vfl_dir = VFL_DIR_M2M,
886 };
887
888 static struct v4l2_m2m_ops m2m_ops = {
889 .device_run = emmaprp_device_run,
890 .job_abort = emmaprp_job_abort,
891 .lock = emmaprp_lock,
892 .unlock = emmaprp_unlock,
893 };
894
895 static int emmaprp_probe(struct platform_device *pdev)
896 {
897 struct emmaprp_dev *pcdev;
898 struct video_device *vfd;
899 struct resource *res_emma;
900 int irq_emma;
901 int ret;
902
903 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
904 if (!pcdev)
905 return -ENOMEM;
906
907 spin_lock_init(&pcdev->irqlock);
908
909 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
910 if (IS_ERR(pcdev->clk_emma_ipg)) {
911 return PTR_ERR(pcdev->clk_emma_ipg);
912 }
913
914 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
915 if (IS_ERR(pcdev->clk_emma_ahb))
916 return PTR_ERR(pcdev->clk_emma_ahb);
917
918 irq_emma = platform_get_irq(pdev, 0);
919 res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0);
920 if (irq_emma < 0 || res_emma == NULL) {
921 dev_err(&pdev->dev, "Missing platform resources data\n");
922 return -ENODEV;
923 }
924
925 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
926 if (ret)
927 return ret;
928
929 mutex_init(&pcdev->dev_mutex);
930
931 vfd = video_device_alloc();
932 if (!vfd) {
933 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
934 ret = -ENOMEM;
935 goto unreg_dev;
936 }
937
938 *vfd = emmaprp_videodev;
939 vfd->lock = &pcdev->dev_mutex;
940 vfd->v4l2_dev = &pcdev->v4l2_dev;
941
942 video_set_drvdata(vfd, pcdev);
943 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
944 pcdev->vfd = vfd;
945 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
946 " Device registered as /dev/video%d\n", vfd->num);
947
948 platform_set_drvdata(pdev, pcdev);
949
950 pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res_emma);
951 if (IS_ERR(pcdev->base_emma)) {
952 ret = PTR_ERR(pcdev->base_emma);
953 goto rel_vdev;
954 }
955
956 pcdev->irq_emma = irq_emma;
957 pcdev->res_emma = res_emma;
958
959 if (devm_request_irq(&pdev->dev, pcdev->irq_emma, emmaprp_irq,
960 0, MEM2MEM_NAME, pcdev) < 0) {
961 ret = -ENODEV;
962 goto rel_vdev;
963 }
964
965 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
966 if (IS_ERR(pcdev->alloc_ctx)) {
967 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
968 ret = PTR_ERR(pcdev->alloc_ctx);
969 goto rel_vdev;
970 }
971
972 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
973 if (IS_ERR(pcdev->m2m_dev)) {
974 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
975 ret = PTR_ERR(pcdev->m2m_dev);
976 goto rel_ctx;
977 }
978
979 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
980 if (ret) {
981 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
982 goto rel_m2m;
983 }
984
985 return 0;
986
987
988 rel_m2m:
989 v4l2_m2m_release(pcdev->m2m_dev);
990 rel_ctx:
991 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
992 rel_vdev:
993 video_device_release(vfd);
994 unreg_dev:
995 v4l2_device_unregister(&pcdev->v4l2_dev);
996
997 return ret;
998 }
999
1000 static int emmaprp_remove(struct platform_device *pdev)
1001 {
1002 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
1003
1004 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
1005
1006 video_unregister_device(pcdev->vfd);
1007 v4l2_m2m_release(pcdev->m2m_dev);
1008 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1009 v4l2_device_unregister(&pcdev->v4l2_dev);
1010
1011 return 0;
1012 }
1013
1014 static struct platform_driver emmaprp_pdrv = {
1015 .probe = emmaprp_probe,
1016 .remove = emmaprp_remove,
1017 .driver = {
1018 .name = MEM2MEM_NAME,
1019 .owner = THIS_MODULE,
1020 },
1021 };
1022 module_platform_driver(emmaprp_pdrv);
Linux kernel - Deliverables
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