1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Support eMMa-PrP through mem2mem framework.
4 *
5 * eMMa-PrP is a piece of HW that allows fetching buffers
6 * from one memory location and do several operations on
7 * them such as scaling or format conversion giving, as a result
8 * a new processed buffer in another memory location.
9 *
10 * Based on mem2mem_testdev.c by Pawel Osciak.
11 *
12 * Copyright (c) 2011 Vista Silicon S.L.
13 * Javier Martin <javier.martin@vista-silicon.com>
14 */
15 #include <linux/module.h>
16 #include <linux/clk.h>
17 #include <linux/slab.h>
18 #include <linux/interrupt.h>
19 #include <linux/io.h>
20
21 #include <linux/platform_device.h>
22 #include <media/v4l2-mem2mem.h>
23 #include <media/v4l2-device.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/videobuf2-dma-contig.h>
26 #include <linux/sizes.h>
27
28 #define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
29
30 MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
31 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
32 MODULE_LICENSE("GPL");
33 MODULE_VERSION("0.0.1");
34
35 static bool debug;
36 module_param(debug, bool, 0644);
37
38 #define MIN_W 32
39 #define MIN_H 32
40 #define MAX_W 2040
41 #define MAX_H 2046
42
43 #define S_ALIGN 1 /* multiple of 2 */
44 #define W_ALIGN_YUV420 3 /* multiple of 8 */
45 #define W_ALIGN_OTHERS 2 /* multiple of 4 */
46 #define H_ALIGN 1 /* multiple of 2 */
47
48 /* Flags that indicate a format can be used for capture/output */
49 #define MEM2MEM_CAPTURE (1 << 0)
50 #define MEM2MEM_OUTPUT (1 << 1)
51
52 #define MEM2MEM_NAME "m2m-emmaprp"
53
54 /* In bytes, per queue */
55 #define MEM2MEM_VID_MEM_LIMIT SZ_16M
56
57 #define dprintk(dev, fmt, arg...) \
58 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
59
60 /* EMMA PrP */
61 #define PRP_CNTL 0x00
62 #define PRP_INTR_CNTL 0x04
63 #define PRP_INTRSTATUS 0x08
64 #define PRP_SOURCE_Y_PTR 0x0c
65 #define PRP_SOURCE_CB_PTR 0x10
66 #define PRP_SOURCE_CR_PTR 0x14
67 #define PRP_DEST_RGB1_PTR 0x18
68 #define PRP_DEST_RGB2_PTR 0x1c
69 #define PRP_DEST_Y_PTR 0x20
70 #define PRP_DEST_CB_PTR 0x24
71 #define PRP_DEST_CR_PTR 0x28
72 #define PRP_SRC_FRAME_SIZE 0x2c
73 #define PRP_DEST_CH1_LINE_STRIDE 0x30
74 #define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
75 #define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
76 #define PRP_CH1_OUT_IMAGE_SIZE 0x3c
77 #define PRP_CH2_OUT_IMAGE_SIZE 0x40
78 #define PRP_SRC_LINE_STRIDE 0x44
79 #define PRP_CSC_COEF_012 0x48
80 #define PRP_CSC_COEF_345 0x4c
81 #define PRP_CSC_COEF_678 0x50
82 #define PRP_CH1_RZ_HORI_COEF1 0x54
83 #define PRP_CH1_RZ_HORI_COEF2 0x58
84 #define PRP_CH1_RZ_HORI_VALID 0x5c
85 #define PRP_CH1_RZ_VERT_COEF1 0x60
86 #define PRP_CH1_RZ_VERT_COEF2 0x64
87 #define PRP_CH1_RZ_VERT_VALID 0x68
88 #define PRP_CH2_RZ_HORI_COEF1 0x6c
89 #define PRP_CH2_RZ_HORI_COEF2 0x70
90 #define PRP_CH2_RZ_HORI_VALID 0x74
91 #define PRP_CH2_RZ_VERT_COEF1 0x78
92 #define PRP_CH2_RZ_VERT_COEF2 0x7c
93 #define PRP_CH2_RZ_VERT_VALID 0x80
94
95 #define PRP_CNTL_CH1EN (1 << 0)
96 #define PRP_CNTL_CH2EN (1 << 1)
97 #define PRP_CNTL_CSIEN (1 << 2)
98 #define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
99 #define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
100 #define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
101 #define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
102 #define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
103 #define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
104 #define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
105 #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
106 #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
107 #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
108 #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
109 #define PRP_CNTL_CH1_LEN (1 << 9)
110 #define PRP_CNTL_CH2_LEN (1 << 10)
111 #define PRP_CNTL_SKIP_FRAME (1 << 11)
112 #define PRP_CNTL_SWRST (1 << 12)
113 #define PRP_CNTL_CLKEN (1 << 13)
114 #define PRP_CNTL_WEN (1 << 14)
115 #define PRP_CNTL_CH1BYP (1 << 15)
116 #define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
117 #define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
118 #define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
119 #define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
120 #define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
121 #define PRP_CNTL_CH2B1EN (1 << 29)
122 #define PRP_CNTL_CH2B2EN (1 << 30)
123 #define PRP_CNTL_CH2FEN (1UL << 31)
124
125 #define PRP_SIZE_HEIGHT(x) (x)
126 #define PRP_SIZE_WIDTH(x) ((x) << 16)
127
128 /* IRQ Enable and status register */
129 #define PRP_INTR_RDERR (1 << 0)
130 #define PRP_INTR_CH1WERR (1 << 1)
131 #define PRP_INTR_CH2WERR (1 << 2)
132 #define PRP_INTR_CH1FC (1 << 3)
133 #define PRP_INTR_CH2FC (1 << 5)
134 #define PRP_INTR_LBOVF (1 << 7)
135 #define PRP_INTR_CH2OVF (1 << 8)
136
137 #define PRP_INTR_ST_RDERR (1 << 0)
138 #define PRP_INTR_ST_CH1WERR (1 << 1)
139 #define PRP_INTR_ST_CH2WERR (1 << 2)
140 #define PRP_INTR_ST_CH2B2CI (1 << 3)
141 #define PRP_INTR_ST_CH2B1CI (1 << 4)
142 #define PRP_INTR_ST_CH1B2CI (1 << 5)
143 #define PRP_INTR_ST_CH1B1CI (1 << 6)
144 #define PRP_INTR_ST_LBOVF (1 << 7)
145 #define PRP_INTR_ST_CH2OVF (1 << 8)
146
147 struct emmaprp_fmt {
148 u32 fourcc;
149 /* Types the format can be used for */
150 u32 types;
151 };
152
153 static struct emmaprp_fmt formats[] = {
154 {
155 .fourcc = V4L2_PIX_FMT_YUV420,
156 .types = MEM2MEM_CAPTURE,
157 },
158 {
159 .fourcc = V4L2_PIX_FMT_YUYV,
160 .types = MEM2MEM_OUTPUT,
161 },
162 };
163
164 /* Per-queue, driver-specific private data */
165 struct emmaprp_q_data {
166 unsigned int width;
167 unsigned int height;
168 unsigned int sizeimage;
169 struct emmaprp_fmt *fmt;
170 };
171
172 enum {
173 V4L2_M2M_SRC = 0,
174 V4L2_M2M_DST = 1,
175 };
176
177 #define NUM_FORMATS ARRAY_SIZE(formats)
178
find_format(struct v4l2_format * f)179 static struct emmaprp_fmt *find_format(struct v4l2_format *f)
180 {
181 struct emmaprp_fmt *fmt;
182 unsigned int k;
183
184 for (k = 0; k < NUM_FORMATS; k++) {
185 fmt = &formats[k];
186 if (fmt->fourcc == f->fmt.pix.pixelformat)
187 break;
188 }
189
190 if (k == NUM_FORMATS)
191 return NULL;
192
193 return &formats[k];
194 }
195
196 struct emmaprp_dev {
197 struct v4l2_device v4l2_dev;
198 struct video_device *vfd;
199
200 struct mutex dev_mutex;
201 spinlock_t irqlock;
202
203 void __iomem *base_emma;
204 struct clk *clk_emma_ahb, *clk_emma_ipg;
205
206 struct v4l2_m2m_dev *m2m_dev;
207 };
208
209 struct emmaprp_ctx {
210 struct v4l2_fh fh;
211 struct emmaprp_dev *dev;
212 /* Abort requested by m2m */
213 int aborting;
214 struct emmaprp_q_data q_data[2];
215 };
216
get_q_data(struct emmaprp_ctx * ctx,enum v4l2_buf_type type)217 static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
218 enum v4l2_buf_type type)
219 {
220 switch (type) {
221 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
222 return &(ctx->q_data[V4L2_M2M_SRC]);
223 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
224 return &(ctx->q_data[V4L2_M2M_DST]);
225 default:
226 BUG();
227 }
228 return NULL;
229 }
230
231 /*
232 * mem2mem callbacks
233 */
emmaprp_job_abort(void * priv)234 static void emmaprp_job_abort(void *priv)
235 {
236 struct emmaprp_ctx *ctx = priv;
237 struct emmaprp_dev *pcdev = ctx->dev;
238
239 ctx->aborting = 1;
240
241 dprintk(pcdev, "Aborting task\n");
242
243 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->fh.m2m_ctx);
244 }
245
emmaprp_dump_regs(struct emmaprp_dev * pcdev)246 static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
247 {
248 dprintk(pcdev,
249 "eMMa-PrP Registers:\n"
250 " SOURCE_Y_PTR = 0x%08X\n"
251 " SRC_FRAME_SIZE = 0x%08X\n"
252 " DEST_Y_PTR = 0x%08X\n"
253 " DEST_CR_PTR = 0x%08X\n"
254 " DEST_CB_PTR = 0x%08X\n"
255 " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
256 " CNTL = 0x%08X\n",
257 readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
258 readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
259 readl(pcdev->base_emma + PRP_DEST_Y_PTR),
260 readl(pcdev->base_emma + PRP_DEST_CR_PTR),
261 readl(pcdev->base_emma + PRP_DEST_CB_PTR),
262 readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
263 readl(pcdev->base_emma + PRP_CNTL));
264 }
265
emmaprp_device_run(void * priv)266 static void emmaprp_device_run(void *priv)
267 {
268 struct emmaprp_ctx *ctx = priv;
269 struct emmaprp_q_data *s_q_data, *d_q_data;
270 struct vb2_v4l2_buffer *src_buf, *dst_buf;
271 struct emmaprp_dev *pcdev = ctx->dev;
272 unsigned int s_width, s_height;
273 unsigned int d_width, d_height;
274 unsigned int d_size;
275 dma_addr_t p_in, p_out;
276 u32 tmp;
277
278 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
279 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
280
281 s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
282 s_width = s_q_data->width;
283 s_height = s_q_data->height;
284
285 d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
286 d_width = d_q_data->width;
287 d_height = d_q_data->height;
288 d_size = d_width * d_height;
289
290 p_in = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
291 p_out = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
292 if (!p_in || !p_out) {
293 v4l2_err(&pcdev->v4l2_dev,
294 "Acquiring kernel pointers to buffers failed\n");
295 return;
296 }
297
298 /* Input frame parameters */
299 writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
300 writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
301 pcdev->base_emma + PRP_SRC_FRAME_SIZE);
302
303 /* Output frame parameters */
304 writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
305 writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
306 writel(p_out + d_size + (d_size >> 2),
307 pcdev->base_emma + PRP_DEST_CR_PTR);
308 writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
309 pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
310
311 /* IRQ configuration */
312 tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
313 writel(tmp | PRP_INTR_RDERR |
314 PRP_INTR_CH2WERR |
315 PRP_INTR_CH2FC,
316 pcdev->base_emma + PRP_INTR_CNTL);
317
318 emmaprp_dump_regs(pcdev);
319
320 /* Enable transfer */
321 tmp = readl(pcdev->base_emma + PRP_CNTL);
322 writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
323 PRP_CNTL_DATA_IN_YUV422 |
324 PRP_CNTL_CH2EN,
325 pcdev->base_emma + PRP_CNTL);
326 }
327
emmaprp_irq(int irq_emma,void * data)328 static irqreturn_t emmaprp_irq(int irq_emma, void *data)
329 {
330 struct emmaprp_dev *pcdev = data;
331 struct emmaprp_ctx *curr_ctx;
332 struct vb2_v4l2_buffer *src_vb, *dst_vb;
333 unsigned long flags;
334 u32 irqst;
335
336 /* Check irq flags and clear irq */
337 irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
338 writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
339 dprintk(pcdev, "irqst = 0x%08x\n", irqst);
340
341 curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
342 if (curr_ctx == NULL) {
343 pr_err("Instance released before the end of transaction\n");
344 return IRQ_HANDLED;
345 }
346
347 if (!curr_ctx->aborting) {
348 if ((irqst & PRP_INTR_ST_RDERR) ||
349 (irqst & PRP_INTR_ST_CH2WERR)) {
350 pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
351 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
352 } else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
353 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
354 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
355
356 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
357 dst_vb->flags &=
358 ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
359 dst_vb->flags |=
360 src_vb->flags
361 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
362 dst_vb->timecode = src_vb->timecode;
363
364 spin_lock_irqsave(&pcdev->irqlock, flags);
365 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
366 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
367 spin_unlock_irqrestore(&pcdev->irqlock, flags);
368 }
369 }
370
371 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->fh.m2m_ctx);
372 return IRQ_HANDLED;
373 }
374
375 /*
376 * video ioctls
377 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)378 static int vidioc_querycap(struct file *file, void *priv,
379 struct v4l2_capability *cap)
380 {
381 strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
382 strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
383 return 0;
384 }
385
enum_fmt(struct v4l2_fmtdesc * f,u32 type)386 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
387 {
388 int i, num;
389 struct emmaprp_fmt *fmt;
390
391 num = 0;
392
393 for (i = 0; i < NUM_FORMATS; ++i) {
394 if (formats[i].types & type) {
395 /* index-th format of type type found ? */
396 if (num == f->index)
397 break;
398 /* Correct type but haven't reached our index yet,
399 * just increment per-type index */
400 ++num;
401 }
402 }
403
404 if (i < NUM_FORMATS) {
405 /* Format found */
406 fmt = &formats[i];
407 f->pixelformat = fmt->fourcc;
408 return 0;
409 }
410
411 /* Format not found */
412 return -EINVAL;
413 }
414
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)415 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
416 struct v4l2_fmtdesc *f)
417 {
418 return enum_fmt(f, MEM2MEM_CAPTURE);
419 }
420
vidioc_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * f)421 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
422 struct v4l2_fmtdesc *f)
423 {
424 return enum_fmt(f, MEM2MEM_OUTPUT);
425 }
426
vidioc_g_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)427 static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
428 {
429 struct vb2_queue *vq;
430 struct emmaprp_q_data *q_data;
431
432 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
433 if (!vq)
434 return -EINVAL;
435
436 q_data = get_q_data(ctx, f->type);
437
438 f->fmt.pix.width = q_data->width;
439 f->fmt.pix.height = q_data->height;
440 f->fmt.pix.field = V4L2_FIELD_NONE;
441 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
442 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
443 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
444 else /* YUYV */
445 f->fmt.pix.bytesperline = q_data->width * 2;
446 f->fmt.pix.sizeimage = q_data->sizeimage;
447
448 return 0;
449 }
450
vidioc_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)451 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
452 struct v4l2_format *f)
453 {
454 return vidioc_g_fmt(priv, f);
455 }
456
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)457 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
458 struct v4l2_format *f)
459 {
460 return vidioc_g_fmt(priv, f);
461 }
462
vidioc_try_fmt(struct v4l2_format * f)463 static int vidioc_try_fmt(struct v4l2_format *f)
464 {
465 enum v4l2_field field;
466
467
468 if (!find_format(f))
469 return -EINVAL;
470
471 field = f->fmt.pix.field;
472 if (field == V4L2_FIELD_ANY)
473 field = V4L2_FIELD_NONE;
474 else if (V4L2_FIELD_NONE != field)
475 return -EINVAL;
476
477 /* V4L2 specification suggests the driver corrects the format struct
478 * if any of the dimensions is unsupported */
479 f->fmt.pix.field = field;
480
481 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
482 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
483 W_ALIGN_YUV420, &f->fmt.pix.height,
484 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
485 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
486 } else {
487 v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
488 W_ALIGN_OTHERS, &f->fmt.pix.height,
489 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
490 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
491 }
492 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
493
494 return 0;
495 }
496
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)497 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
498 struct v4l2_format *f)
499 {
500 struct emmaprp_fmt *fmt;
501 struct emmaprp_ctx *ctx = priv;
502
503 fmt = find_format(f);
504 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
505 v4l2_err(&ctx->dev->v4l2_dev,
506 "Fourcc format (0x%08x) invalid.\n",
507 f->fmt.pix.pixelformat);
508 return -EINVAL;
509 }
510
511 return vidioc_try_fmt(f);
512 }
513
vidioc_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)514 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
515 struct v4l2_format *f)
516 {
517 struct emmaprp_fmt *fmt;
518 struct emmaprp_ctx *ctx = priv;
519
520 fmt = find_format(f);
521 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
522 v4l2_err(&ctx->dev->v4l2_dev,
523 "Fourcc format (0x%08x) invalid.\n",
524 f->fmt.pix.pixelformat);
525 return -EINVAL;
526 }
527
528 return vidioc_try_fmt(f);
529 }
530
vidioc_s_fmt(struct emmaprp_ctx * ctx,struct v4l2_format * f)531 static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
532 {
533 struct emmaprp_q_data *q_data;
534 struct vb2_queue *vq;
535 int ret;
536
537 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
538 if (!vq)
539 return -EINVAL;
540
541 q_data = get_q_data(ctx, f->type);
542 if (!q_data)
543 return -EINVAL;
544
545 if (vb2_is_busy(vq)) {
546 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
547 return -EBUSY;
548 }
549
550 ret = vidioc_try_fmt(f);
551 if (ret)
552 return ret;
553
554 q_data->fmt = find_format(f);
555 q_data->width = f->fmt.pix.width;
556 q_data->height = f->fmt.pix.height;
557 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
558 q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
559 else /* YUYV */
560 q_data->sizeimage = q_data->width * q_data->height * 2;
561
562 dprintk(ctx->dev,
563 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
564 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
565
566 return 0;
567 }
568
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)569 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
570 struct v4l2_format *f)
571 {
572 int ret;
573
574 ret = vidioc_try_fmt_vid_cap(file, priv, f);
575 if (ret)
576 return ret;
577
578 return vidioc_s_fmt(priv, f);
579 }
580
vidioc_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)581 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
582 struct v4l2_format *f)
583 {
584 int ret;
585
586 ret = vidioc_try_fmt_vid_out(file, priv, f);
587 if (ret)
588 return ret;
589
590 return vidioc_s_fmt(priv, f);
591 }
592
593 static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
594 .vidioc_querycap = vidioc_querycap,
595
596 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
597 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
598 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
599 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
600
601 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
602 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
603 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
604 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
605
606 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
607 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
608 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
609 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
610 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
611 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
612 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
613 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
614 };
615
616
617 /*
618 * Queue operations
619 */
emmaprp_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])620 static int emmaprp_queue_setup(struct vb2_queue *vq,
621 unsigned int *nbuffers, unsigned int *nplanes,
622 unsigned int sizes[], struct device *alloc_devs[])
623 {
624 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
625 struct emmaprp_q_data *q_data;
626 unsigned int size, count = *nbuffers;
627
628 q_data = get_q_data(ctx, vq->type);
629
630 if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
631 size = q_data->width * q_data->height * 3 / 2;
632 else
633 size = q_data->width * q_data->height * 2;
634
635 while (size * count > MEM2MEM_VID_MEM_LIMIT)
636 (count)--;
637
638 *nplanes = 1;
639 *nbuffers = count;
640 sizes[0] = size;
641
642 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
643
644 return 0;
645 }
646
emmaprp_buf_prepare(struct vb2_buffer * vb)647 static int emmaprp_buf_prepare(struct vb2_buffer *vb)
648 {
649 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
650 struct emmaprp_q_data *q_data;
651
652 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
653
654 q_data = get_q_data(ctx, vb->vb2_queue->type);
655
656 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
657 dprintk(ctx->dev,
658 "%s data will not fit into plane(%lu < %lu)\n",
659 __func__, vb2_plane_size(vb, 0),
660 (long)q_data->sizeimage);
661 return -EINVAL;
662 }
663
664 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
665
666 return 0;
667 }
668
emmaprp_buf_queue(struct vb2_buffer * vb)669 static void emmaprp_buf_queue(struct vb2_buffer *vb)
670 {
671 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
672 struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
673 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
674 }
675
676 static const struct vb2_ops emmaprp_qops = {
677 .queue_setup = emmaprp_queue_setup,
678 .buf_prepare = emmaprp_buf_prepare,
679 .buf_queue = emmaprp_buf_queue,
680 .wait_prepare = vb2_ops_wait_prepare,
681 .wait_finish = vb2_ops_wait_finish,
682 };
683
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)684 static int queue_init(void *priv, struct vb2_queue *src_vq,
685 struct vb2_queue *dst_vq)
686 {
687 struct emmaprp_ctx *ctx = priv;
688 int ret;
689
690 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
691 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
692 src_vq->drv_priv = ctx;
693 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
694 src_vq->ops = &emmaprp_qops;
695 src_vq->mem_ops = &vb2_dma_contig_memops;
696 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
697 src_vq->dev = ctx->dev->v4l2_dev.dev;
698 src_vq->lock = &ctx->dev->dev_mutex;
699
700 ret = vb2_queue_init(src_vq);
701 if (ret)
702 return ret;
703
704 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
705 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
706 dst_vq->drv_priv = ctx;
707 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
708 dst_vq->ops = &emmaprp_qops;
709 dst_vq->mem_ops = &vb2_dma_contig_memops;
710 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
711 dst_vq->dev = ctx->dev->v4l2_dev.dev;
712 dst_vq->lock = &ctx->dev->dev_mutex;
713
714 return vb2_queue_init(dst_vq);
715 }
716
717 /*
718 * File operations
719 */
emmaprp_open(struct file * file)720 static int emmaprp_open(struct file *file)
721 {
722 struct emmaprp_dev *pcdev = video_drvdata(file);
723 struct emmaprp_ctx *ctx;
724
725 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
726 if (!ctx)
727 return -ENOMEM;
728
729 v4l2_fh_init(&ctx->fh, video_devdata(file));
730 file->private_data = &ctx->fh;
731 ctx->dev = pcdev;
732
733 if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
734 kfree(ctx);
735 return -ERESTARTSYS;
736 }
737
738 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
739
740 if (IS_ERR(ctx->fh.m2m_ctx)) {
741 int ret = PTR_ERR(ctx->fh.m2m_ctx);
742
743 mutex_unlock(&pcdev->dev_mutex);
744 kfree(ctx);
745 return ret;
746 }
747
748 clk_prepare_enable(pcdev->clk_emma_ipg);
749 clk_prepare_enable(pcdev->clk_emma_ahb);
750 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
751 ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
752 v4l2_fh_add(&ctx->fh);
753 mutex_unlock(&pcdev->dev_mutex);
754
755 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->fh.m2m_ctx);
756
757 return 0;
758 }
759
emmaprp_release(struct file * file)760 static int emmaprp_release(struct file *file)
761 {
762 struct emmaprp_dev *pcdev = video_drvdata(file);
763 struct emmaprp_ctx *ctx = file->private_data;
764
765 dprintk(pcdev, "Releasing instance %p\n", ctx);
766
767 mutex_lock(&pcdev->dev_mutex);
768 clk_disable_unprepare(pcdev->clk_emma_ahb);
769 clk_disable_unprepare(pcdev->clk_emma_ipg);
770 v4l2_fh_del(&ctx->fh);
771 v4l2_fh_exit(&ctx->fh);
772 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
773 mutex_unlock(&pcdev->dev_mutex);
774 kfree(ctx);
775
776 return 0;
777 }
778
779 static const struct v4l2_file_operations emmaprp_fops = {
780 .owner = THIS_MODULE,
781 .open = emmaprp_open,
782 .release = emmaprp_release,
783 .poll = v4l2_m2m_fop_poll,
784 .unlocked_ioctl = video_ioctl2,
785 .mmap = v4l2_m2m_fop_mmap,
786 };
787
788 static const struct video_device emmaprp_videodev = {
789 .name = MEM2MEM_NAME,
790 .fops = &emmaprp_fops,
791 .ioctl_ops = &emmaprp_ioctl_ops,
792 .minor = -1,
793 .release = video_device_release,
794 .vfl_dir = VFL_DIR_M2M,
795 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
796 };
797
798 static const struct v4l2_m2m_ops m2m_ops = {
799 .device_run = emmaprp_device_run,
800 .job_abort = emmaprp_job_abort,
801 };
802
emmaprp_probe(struct platform_device * pdev)803 static int emmaprp_probe(struct platform_device *pdev)
804 {
805 struct emmaprp_dev *pcdev;
806 struct video_device *vfd;
807 int irq, ret;
808
809 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
810 if (!pcdev)
811 return -ENOMEM;
812
813 spin_lock_init(&pcdev->irqlock);
814
815 pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
816 if (IS_ERR(pcdev->clk_emma_ipg)) {
817 return PTR_ERR(pcdev->clk_emma_ipg);
818 }
819
820 pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
821 if (IS_ERR(pcdev->clk_emma_ahb))
822 return PTR_ERR(pcdev->clk_emma_ahb);
823
824 pcdev->base_emma = devm_platform_ioremap_resource(pdev, 0);
825 if (IS_ERR(pcdev->base_emma))
826 return PTR_ERR(pcdev->base_emma);
827
828 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
829 if (ret)
830 return ret;
831
832 mutex_init(&pcdev->dev_mutex);
833
834 vfd = video_device_alloc();
835 if (!vfd) {
836 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
837 ret = -ENOMEM;
838 goto unreg_dev;
839 }
840
841 *vfd = emmaprp_videodev;
842 vfd->lock = &pcdev->dev_mutex;
843 vfd->v4l2_dev = &pcdev->v4l2_dev;
844
845 video_set_drvdata(vfd, pcdev);
846 pcdev->vfd = vfd;
847 v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
848 " Device registered as /dev/video%d\n", vfd->num);
849
850 platform_set_drvdata(pdev, pcdev);
851
852 irq = platform_get_irq(pdev, 0);
853 if (irq < 0) {
854 ret = irq;
855 goto rel_vdev;
856 }
857
858 ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
859 dev_name(&pdev->dev), pcdev);
860 if (ret)
861 goto rel_vdev;
862
863 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
864 if (IS_ERR(pcdev->m2m_dev)) {
865 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
866 ret = PTR_ERR(pcdev->m2m_dev);
867 goto rel_vdev;
868 }
869
870 ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
871 if (ret) {
872 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
873 goto rel_m2m;
874 }
875
876 return 0;
877
878
879 rel_m2m:
880 v4l2_m2m_release(pcdev->m2m_dev);
881 rel_vdev:
882 video_device_release(vfd);
883 unreg_dev:
884 v4l2_device_unregister(&pcdev->v4l2_dev);
885
886 mutex_destroy(&pcdev->dev_mutex);
887
888 return ret;
889 }
890
emmaprp_remove(struct platform_device * pdev)891 static void emmaprp_remove(struct platform_device *pdev)
892 {
893 struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
894
895 v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
896
897 video_unregister_device(pcdev->vfd);
898 v4l2_m2m_release(pcdev->m2m_dev);
899 v4l2_device_unregister(&pcdev->v4l2_dev);
900 mutex_destroy(&pcdev->dev_mutex);
901 }
902
903 static struct platform_driver emmaprp_pdrv = {
904 .probe = emmaprp_probe,
905 .remove_new = emmaprp_remove,
906 .driver = {
907 .name = MEM2MEM_NAME,
908 },
909 };
910 module_platform_driver(emmaprp_pdrv);
911