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[media] i.MX27: Visstrim_M10: Add support for deinterlacing driver
[linux-block.git] / drivers / media / video / mx2_emmaprp.c
CommitLineData
8091cb7d
JM		 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
34MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
35MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
36MODULE_LICENSE("GPL");
37MODULE_VERSION("0.0.1");
38
39static bool debug;
40module_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
151struct emmaprp_fmt {
152 char *name;
153 u32 fourcc;
154 /* Types the format can be used for */
155 u32 types;
156};
157
158static 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 */
172struct emmaprp_q_data {
173 unsigned int width;
174 unsigned int height;
175 unsigned int sizeimage;
176 struct emmaprp_fmt *fmt;
177};
178
179enum {
180 V4L2_M2M_SRC = 0,
181 V4L2_M2M_DST = 1,
182};
183
184#define NUM_FORMATS ARRAY_SIZE(formats)
185
186static 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
203struct 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;
213 struct resource *res_emma;
214
215 struct v4l2_m2m_dev *m2m_dev;
216 struct vb2_alloc_ctx *alloc_ctx;
217};
218
219struct 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
227static 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 */
244static 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
256static 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
263static 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
270static 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
290static 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
352static 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 ocurred, 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 spin_lock_irqsave(&pcdev->irqlock, flags);
381 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
382 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
383 spin_unlock_irqrestore(&pcdev->irqlock, flags);
384 }
385 }
386
387 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
388 return IRQ_HANDLED;
389}
390
391/*
392 * video ioctls
393 */
394static int vidioc_querycap(struct file *file, void *priv,
395 struct v4l2_capability *cap)
396{
397 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
398 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
f0476a83
SN		 399 /*
400 * This is only a mem-to-mem video device. The capture and output
401 * device capability flags are left only for backward compatibility
402 * and are scheduled for removal.
403 */
404 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
405 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
8091cb7d
JM		 406 return 0;
407}
408
409static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
410{
411 int i, num;
412 struct emmaprp_fmt *fmt;
413
414 num = 0;
415
416 for (i = 0; i < NUM_FORMATS; ++i) {
417 if (formats[i].types & type) {
418 /* index-th format of type type found ? */
419 if (num == f->index)
420 break;
421 /* Correct type but haven't reached our index yet,
422 * just increment per-type index */
423 ++num;
424 }
425 }
426
427 if (i < NUM_FORMATS) {
428 /* Format found */
429 fmt = &formats[i];
430 strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
431 f->pixelformat = fmt->fourcc;
432 return 0;
433 }
434
435 /* Format not found */
436 return -EINVAL;
437}
438
439static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
440 struct v4l2_fmtdesc *f)
441{
442 return enum_fmt(f, MEM2MEM_CAPTURE);
443}
444
445static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
446 struct v4l2_fmtdesc *f)
447{
448 return enum_fmt(f, MEM2MEM_OUTPUT);
449}
450
451static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
452{
453 struct vb2_queue *vq;
454 struct emmaprp_q_data *q_data;
455
456 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
457 if (!vq)
458 return -EINVAL;
459
460 q_data = get_q_data(ctx, f->type);
461
462 f->fmt.pix.width = q_data->width;
463 f->fmt.pix.height = q_data->height;
464 f->fmt.pix.field = V4L2_FIELD_NONE;
465 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
466 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
467 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
468 else /* YUYV */
469 f->fmt.pix.bytesperline = q_data->width * 2;
470 f->fmt.pix.sizeimage = q_data->sizeimage;
471
472 return 0;
473}
474
475static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
476 struct v4l2_format *f)
477{
478 return vidioc_g_fmt(priv, f);
479}
480
481static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
482 struct v4l2_format *f)
483{
484 return vidioc_g_fmt(priv, f);
485}
486
487static int vidioc_try_fmt(struct v4l2_format *f)
488{
489 enum v4l2_field field;
490
491
492 if (!find_format(f))
493 return -EINVAL;
494
495 field = f->fmt.pix.field;
496 if (field == V4L2_FIELD_ANY)
497 field = V4L2_FIELD_NONE;
498 else if (V4L2_FIELD_NONE != field)
499 return -EINVAL;
500
501 /* V4L2 specification suggests the driver corrects the format struct
502 * if any of the dimensions is unsupported */
503 f->fmt.pix.field = field;
504
505 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
506 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
507 W_ALIGN_YUV420, &f->fmt.pix.height,
508 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
509 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
510 } else {
511 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
512 W_ALIGN_OTHERS, &f->fmt.pix.height,
513 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
514 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
515 }
516 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
517
518 return 0;
519}
520
521static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
522 struct v4l2_format *f)
523{
524 struct emmaprp_fmt *fmt;
525 struct emmaprp_ctx *ctx = priv;
526
527 fmt = find_format(f);
528 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
529 v4l2_err(&ctx->dev->v4l2_dev,
530 "Fourcc format (0x%08x) invalid.\n",
531 f->fmt.pix.pixelformat);
532 return -EINVAL;
533 }
534
535 return vidioc_try_fmt(f);
536}
537
538static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
539 struct v4l2_format *f)
540{
541 struct emmaprp_fmt *fmt;
542 struct emmaprp_ctx *ctx = priv;
543
544 fmt = find_format(f);
545 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
546 v4l2_err(&ctx->dev->v4l2_dev,
547 "Fourcc format (0x%08x) invalid.\n",
548 f->fmt.pix.pixelformat);
549 return -EINVAL;
550 }
551
552 return vidioc_try_fmt(f);
553}
554
555static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
556{
557 struct emmaprp_q_data *q_data;
558 struct vb2_queue *vq;
559 int ret;
560
561 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
562 if (!vq)
563 return -EINVAL;
564
565 q_data = get_q_data(ctx, f->type);
566 if (!q_data)
567 return -EINVAL;
568
569 if (vb2_is_busy(vq)) {
570 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
571 return -EBUSY;
572 }
573
574 ret = vidioc_try_fmt(f);
575 if (ret)
576 return ret;
577
578 q_data->fmt = find_format(f);
579 q_data->width = f->fmt.pix.width;
580 q_data->height = f->fmt.pix.height;
581 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
582 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
583 else /* YUYV */
584 q_data->sizeimage = q_data->width * q_data->height * 2;
585
586 dprintk(ctx->dev,
587 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
588 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
589
590 return 0;
591}
592
593static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
594 struct v4l2_format *f)
595{
596 int ret;
597
598 ret = vidioc_try_fmt_vid_cap(file, priv, f);
599 if (ret)
600 return ret;
601
602 return vidioc_s_fmt(priv, f);
603}
604
605static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
606 struct v4l2_format *f)
607{
608 int ret;
609
610 ret = vidioc_try_fmt_vid_out(file, priv, f);
611 if (ret)
612 return ret;
613
614 return vidioc_s_fmt(priv, f);
615}
616
617static int vidioc_reqbufs(struct file *file, void *priv,
618 struct v4l2_requestbuffers *reqbufs)
619{
620 struct emmaprp_ctx *ctx = priv;
621
622 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
623}
624
625static int vidioc_querybuf(struct file *file, void *priv,
626 struct v4l2_buffer *buf)
627{
628 struct emmaprp_ctx *ctx = priv;
629
630 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
631}
632
633static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
634{
635 struct emmaprp_ctx *ctx = priv;
636
637 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
638}
639
640static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
641{
642 struct emmaprp_ctx *ctx = priv;
643
644 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
645}
646
647static int vidioc_streamon(struct file *file, void *priv,
648 enum v4l2_buf_type type)
649{
650 struct emmaprp_ctx *ctx = priv;
651
652 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
653}
654
655static int vidioc_streamoff(struct file *file, void *priv,
656 enum v4l2_buf_type type)
657{
658 struct emmaprp_ctx *ctx = priv;
659
660 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
661}
662
663static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
664 .vidioc_querycap = vidioc_querycap,
665
666 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
667 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
668 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
669 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
670
671 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
672 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
673 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
674 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
675
676 .vidioc_reqbufs = vidioc_reqbufs,
677 .vidioc_querybuf = vidioc_querybuf,
678
679 .vidioc_qbuf = vidioc_qbuf,
680 .vidioc_dqbuf = vidioc_dqbuf,
681
682 .vidioc_streamon = vidioc_streamon,
683 .vidioc_streamoff = vidioc_streamoff,
684};
685
686
687/*
688 * Queue operations
689 */
690static int emmaprp_queue_setup(struct vb2_queue *vq,
691 const struct v4l2_format *fmt,
692 unsigned int *nbuffers, unsigned int *nplanes,
693 unsigned int sizes[], void *alloc_ctxs[])
694{
695 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
696 struct emmaprp_q_data *q_data;
697 unsigned int size, count = *nbuffers;
698
699 q_data = get_q_data(ctx, vq->type);
700
701 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
702 size = q_data->width * q_data->height * 3 / 2;
703 else
704 size = q_data->width * q_data->height * 2;
705
706 while (size * count > MEM2MEM_VID_MEM_LIMIT)
707 (count)--;
708
709 *nplanes = 1;
710 *nbuffers = count;
711 sizes[0] = size;
712
713 alloc_ctxs[0] = ctx->dev->alloc_ctx;
714
715 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
716
717 return 0;
718}
719
720static int emmaprp_buf_prepare(struct vb2_buffer *vb)
721{
722 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
723 struct emmaprp_q_data *q_data;
724
725 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
726
727 q_data = get_q_data(ctx, vb->vb2_queue->type);
728
729 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
730 dprintk(ctx->dev, "%s data will not fit into plane"
731 "(%lu < %lu)\n", __func__,
732 vb2_plane_size(vb, 0),
733 (long)q_data->sizeimage);
734 return -EINVAL;
735 }
736
737 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
738
739 return 0;
740}
741
742static void emmaprp_buf_queue(struct vb2_buffer *vb)
743{
744 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
745 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
746}
747
748static struct vb2_ops emmaprp_qops = {
749 .queue_setup = emmaprp_queue_setup,
750 .buf_prepare = emmaprp_buf_prepare,
751 .buf_queue = emmaprp_buf_queue,
752};
753
754static int queue_init(void *priv, struct vb2_queue *src_vq,
755 struct vb2_queue *dst_vq)
756{
757 struct emmaprp_ctx *ctx = priv;
758 int ret;
759
760 memset(src_vq, 0, sizeof(*src_vq));
761 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
28638601 762 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
8091cb7d
JM		 763 src_vq->drv_priv = ctx;
764 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
765 src_vq->ops = &emmaprp_qops;
766 src_vq->mem_ops = &vb2_dma_contig_memops;
767
768 ret = vb2_queue_init(src_vq);
769 if (ret)
770 return ret;
771
772 memset(dst_vq, 0, sizeof(*dst_vq));
773 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
28638601 774 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
8091cb7d
JM		 775 dst_vq->drv_priv = ctx;
776 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
777 dst_vq->ops = &emmaprp_qops;
778 dst_vq->mem_ops = &vb2_dma_contig_memops;
779
780 return vb2_queue_init(dst_vq);
781}
782
783/*
784 * File operations
785 */
786static int emmaprp_open(struct file *file)
787{
788 struct emmaprp_dev *pcdev = video_drvdata(file);
789 struct emmaprp_ctx *ctx;
790
791 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
792 if (!ctx)
793 return -ENOMEM;
794
795 file->private_data = ctx;
796 ctx->dev = pcdev;
797
798 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
799
800 if (IS_ERR(ctx->m2m_ctx)) {
801 int ret = PTR_ERR(ctx->m2m_ctx);
802
803 kfree(ctx);
804 return ret;
805 }
806
807 clk_enable(pcdev->clk_emma);
808 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
809 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
810
811 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
812
813 return 0;
814}
815
816static int emmaprp_release(struct file *file)
817{
818 struct emmaprp_dev *pcdev = video_drvdata(file);
819 struct emmaprp_ctx *ctx = file->private_data;
820
821 dprintk(pcdev, "Releasing instance %p\n", ctx);
822
823 clk_disable(pcdev->clk_emma);
824 v4l2_m2m_ctx_release(ctx->m2m_ctx);
825 kfree(ctx);
826
827 return 0;
828}
829
830static unsigned int emmaprp_poll(struct file *file,
831 struct poll_table_struct *wait)
832{
833 struct emmaprp_ctx *ctx = file->private_data;
834
835 return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
836}
837
838static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
839{
840 struct emmaprp_ctx *ctx = file->private_data;
841
842 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
843}
844
845static const struct v4l2_file_operations emmaprp_fops = {
846 .owner = THIS_MODULE,
847 .open = emmaprp_open,
848 .release = emmaprp_release,
849 .poll = emmaprp_poll,
850 .unlocked_ioctl = video_ioctl2,
851 .mmap = emmaprp_mmap,
852};
853
854static struct video_device emmaprp_videodev = {
855 .name = MEM2MEM_NAME,
856 .fops = &emmaprp_fops,
857 .ioctl_ops = &emmaprp_ioctl_ops,
858 .minor = -1,
859 .release = video_device_release,
860};
861
862static struct v4l2_m2m_ops m2m_ops = {
863 .device_run = emmaprp_device_run,
864 .job_abort = emmaprp_job_abort,
865 .lock = emmaprp_lock,
866 .unlock = emmaprp_unlock,
867};
868
869static int emmaprp_probe(struct platform_device *pdev)
870{
871 struct emmaprp_dev *pcdev;
872 struct video_device *vfd;
873 struct resource *res_emma;
874 int irq_emma;
875 int ret;
876
877 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
878 if (!pcdev)
879 return -ENOMEM;
880
881 spin_lock_init(&pcdev->irqlock);
882
883 pcdev->clk_emma = clk_get(&pdev->dev, NULL);
884 if (IS_ERR(pcdev->clk_emma)) {
885 ret = PTR_ERR(pcdev->clk_emma);
886 goto free_dev;
887 }
888
889 irq_emma = platform_get_irq(pdev, 0);
890 res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0);
891 if (irq_emma < 0 || res_emma == NULL) {
892 dev_err(&pdev->dev, "Missing platform resources data\n");
893 ret = -ENODEV;
894 goto free_clk;
895 }
896
897 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
898 if (ret)
899 goto free_clk;
900
901 mutex_init(&pcdev->dev_mutex);
902
903 vfd = video_device_alloc();
904 if (!vfd) {
905 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
906 ret = -ENOMEM;
907 goto unreg_dev;
908 }
909
910 *vfd = emmaprp_videodev;
5126f259
HV		 911 /* Locking in file operations other than ioctl should be done
912 by the driver, not the V4L2 core.
913 This driver needs auditing so that this flag can be removed. */
914 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
8091cb7d
JM		 915 vfd->lock = &pcdev->dev_mutex;
916
917 video_set_drvdata(vfd, pcdev);
918 snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
919 pcdev->vfd = vfd;
920 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
921 " Device registered as /dev/video%d\n", vfd->num);
922
923 platform_set_drvdata(pdev, pcdev);
924
925 if (devm_request_mem_region(&pdev->dev, res_emma->start,
926 resource_size(res_emma), MEM2MEM_NAME) == NULL)
927 goto rel_vdev;
928
929 pcdev->base_emma = devm_ioremap(&pdev->dev, res_emma->start,
930 resource_size(res_emma));
931 if (!pcdev->base_emma)
932 goto rel_vdev;
933
934 pcdev->irq_emma = irq_emma;
935 pcdev->res_emma = res_emma;
936
937 if (devm_request_irq(&pdev->dev, pcdev->irq_emma, emmaprp_irq,
938 0, MEM2MEM_NAME, pcdev) < 0)
939 goto rel_vdev;
940
941 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
942 if (IS_ERR(pcdev->alloc_ctx)) {
943 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
944 ret = PTR_ERR(pcdev->alloc_ctx);
945 goto rel_vdev;
946 }
947
948 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
949 if (IS_ERR(pcdev->m2m_dev)) {
950 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
951 ret = PTR_ERR(pcdev->m2m_dev);
952 goto rel_ctx;
953 }
954
955 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
956 if (ret) {
957 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
958 goto rel_m2m;
959 }
960
961 return 0;
962
963
964rel_m2m:
965 v4l2_m2m_release(pcdev->m2m_dev);
966rel_ctx:
967 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
968rel_vdev:
969 video_device_release(vfd);
970unreg_dev:
971 v4l2_device_unregister(&pcdev->v4l2_dev);
972free_clk:
973 clk_put(pcdev->clk_emma);
974free_dev:
975 kfree(pcdev);
976
977 return ret;
978}
979
980static int emmaprp_remove(struct platform_device *pdev)
981{
982 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
983
984 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
985
986 video_unregister_device(pcdev->vfd);
987 v4l2_m2m_release(pcdev->m2m_dev);
988 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
989 v4l2_device_unregister(&pcdev->v4l2_dev);
990 clk_put(pcdev->clk_emma);
991 kfree(pcdev);
992
993 return 0;
994}
995
996static struct platform_driver emmaprp_pdrv = {
997 .probe = emmaprp_probe,
998 .remove = emmaprp_remove,
999 .driver = {
1000 .name = MEM2MEM_NAME,
1001 .owner = THIS_MODULE,
1002 },
1003};
1004
1005static void __exit emmaprp_exit(void)
1006{
1007 platform_driver_unregister(&emmaprp_pdrv);
1008}
1009
1010static int __init emmaprp_init(void)
1011{
1012 return platform_driver_register(&emmaprp_pdrv);
1013}
1014
1015module_init(emmaprp_init);
1016module_exit(emmaprp_exit);
Linux 6.x block layer and io_uring tree(s)