Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/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 <linux/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         void __iomem            *base_emma;
211         struct clk              *clk_emma_ahb, *clk_emma_ipg;
212 
213         struct v4l2_m2m_dev     *m2m_dev;
214 };
215 
216 struct emmaprp_ctx {
217         struct emmaprp_dev      *dev;
218         /* Abort requested by m2m */
219         int                     aborting;
220         struct emmaprp_q_data   q_data[2];
221         struct v4l2_m2m_ctx     *m2m_ctx;
222 };
223 
224 static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
225                                          enum v4l2_buf_type type)
226 {
227         switch (type) {
228         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
229                 return &(ctx->q_data[V4L2_M2M_SRC]);
230         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
231                 return &(ctx->q_data[V4L2_M2M_DST]);
232         default:
233                 BUG();
234         }
235         return NULL;
236 }
237 
238 /*
239  * mem2mem callbacks
240  */
241 static void emmaprp_job_abort(void *priv)
242 {
243         struct emmaprp_ctx *ctx = priv;
244         struct emmaprp_dev *pcdev = ctx->dev;
245 
246         ctx->aborting = 1;
247 
248         dprintk(pcdev, "Aborting task\n");
249 
250         v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
251 }
252 
253 static void emmaprp_lock(void *priv)
254 {
255         struct emmaprp_ctx *ctx = priv;
256         struct emmaprp_dev *pcdev = ctx->dev;
257         mutex_lock(&pcdev->dev_mutex);
258 }
259 
260 static void emmaprp_unlock(void *priv)
261 {
262         struct emmaprp_ctx *ctx = priv;
263         struct emmaprp_dev *pcdev = ctx->dev;
264         mutex_unlock(&pcdev->dev_mutex);
265 }
266 
267 static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
268 {
269         dprintk(pcdev,
270                 "eMMa-PrP Registers:\n"
271                 "  SOURCE_Y_PTR = 0x%08X\n"
272                 "  SRC_FRAME_SIZE = 0x%08X\n"
273                 "  DEST_Y_PTR = 0x%08X\n"
274                 "  DEST_CR_PTR = 0x%08X\n"
275                 "  DEST_CB_PTR = 0x%08X\n"
276                 "  CH2_OUT_IMAGE_SIZE = 0x%08X\n"
277                 "  CNTL = 0x%08X\n",
278                 readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
279                 readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
280                 readl(pcdev->base_emma + PRP_DEST_Y_PTR),
281                 readl(pcdev->base_emma + PRP_DEST_CR_PTR),
282                 readl(pcdev->base_emma + PRP_DEST_CB_PTR),
283                 readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
284                 readl(pcdev->base_emma + PRP_CNTL));
285 }
286 
287 static void emmaprp_device_run(void *priv)
288 {
289         struct emmaprp_ctx *ctx = priv;
290         struct emmaprp_q_data *s_q_data, *d_q_data;
291         struct vb2_buffer *src_buf, *dst_buf;
292         struct emmaprp_dev *pcdev = ctx->dev;
293         unsigned int s_width, s_height;
294         unsigned int d_width, d_height;
295         unsigned int d_size;
296         dma_addr_t p_in, p_out;
297         u32 tmp;
298 
299         src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
300         dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
301 
302         s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
303         s_width = s_q_data->width;
304         s_height = s_q_data->height;
305 
306         d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
307         d_width = d_q_data->width;
308         d_height = d_q_data->height;
309         d_size = d_width * d_height;
310 
311         p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
312         p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
313         if (!p_in || !p_out) {
314                 v4l2_err(&pcdev->v4l2_dev,
315                          "Acquiring kernel pointers to buffers failed\n");
316                 return;
317         }
318 
319         /* Input frame parameters */
320         writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
321         writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
322                pcdev->base_emma + PRP_SRC_FRAME_SIZE);
323 
324         /* Output frame parameters */
325         writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
326         writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
327         writel(p_out + d_size + (d_size >> 2),
328                pcdev->base_emma + PRP_DEST_CR_PTR);
329         writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
330                pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
331 
332         /* IRQ configuration */
333         tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
334         writel(tmp | PRP_INTR_RDERR |
335                 PRP_INTR_CH2WERR |
336                 PRP_INTR_CH2FC,
337                 pcdev->base_emma + PRP_INTR_CNTL);
338 
339         emmaprp_dump_regs(pcdev);
340 
341         /* Enable transfer */
342         tmp = readl(pcdev->base_emma + PRP_CNTL);
343         writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
344                 PRP_CNTL_DATA_IN_YUV422 |
345                 PRP_CNTL_CH2EN,
346                 pcdev->base_emma + PRP_CNTL);
347 }
348 
349 static irqreturn_t emmaprp_irq(int irq_emma, void *data)
350 {
351         struct emmaprp_dev *pcdev = data;
352         struct emmaprp_ctx *curr_ctx;
353         struct vb2_v4l2_buffer *src_vb, *dst_vb;
354         unsigned long flags;
355         u32 irqst;
356 
357         /* Check irq flags and clear irq */
358         irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
359         writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
360         dprintk(pcdev, "irqst = 0x%08x\n", irqst);
361 
362         curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
363         if (curr_ctx == NULL) {
364                 pr_err("Instance released before the end of transaction\n");
365                 return IRQ_HANDLED;
366         }
367 
368         if (!curr_ctx->aborting) {
369                 if ((irqst & PRP_INTR_ST_RDERR) ||
370                 (irqst & PRP_INTR_ST_CH2WERR)) {
371                         pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
372                         writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
373                 } else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
374                         src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
375                         dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
376 
377                         dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
378                         dst_vb->flags &=
379                                 ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
380                         dst_vb->flags |=
381                                 src_vb->flags
382                                 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
383                         dst_vb->timecode = src_vb->timecode;
384 
385                         spin_lock_irqsave(&pcdev->irqlock, flags);
386                         v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
387                         v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
388                         spin_unlock_irqrestore(&pcdev->irqlock, flags);
389                 }
390         }
391 
392         v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
393         return IRQ_HANDLED;
394 }
395 
396 /*
397  * video ioctls
398  */
399 static int vidioc_querycap(struct file *file, void *priv,
400                            struct v4l2_capability *cap)
401 {
402         strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
403         strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
404         cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
405         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
406         return 0;
407 }
408 
409 static 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 
439 static 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 
445 static 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 
451 static 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 
475 static 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 
481 static 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 
487 static 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 
521 static 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 
538 static 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 
555 static 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 
593 static 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 
605 static 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 
617 static 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 
625 static 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 
633 static 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 
640 static 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 
647 static 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 
655 static 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 
663 static 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  */
690 static int emmaprp_queue_setup(struct vb2_queue *vq,
691                                 unsigned int *nbuffers, unsigned int *nplanes,
692                                 unsigned int sizes[], struct device *alloc_devs[])
693 {
694         struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
695         struct emmaprp_q_data *q_data;
696         unsigned int size, count = *nbuffers;
697 
698         q_data = get_q_data(ctx, vq->type);
699 
700         if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
701                 size = q_data->width * q_data->height * 3 / 2;
702         else
703                 size = q_data->width * q_data->height * 2;
704 
705         while (size * count > MEM2MEM_VID_MEM_LIMIT)
706                 (count)--;
707 
708         *nplanes = 1;
709         *nbuffers = count;
710         sizes[0] = size;
711 
712         dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
713 
714         return 0;
715 }
716 
717 static int emmaprp_buf_prepare(struct vb2_buffer *vb)
718 {
719         struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
720         struct emmaprp_q_data *q_data;
721 
722         dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
723 
724         q_data = get_q_data(ctx, vb->vb2_queue->type);
725 
726         if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
727                 dprintk(ctx->dev, "%s data will not fit into plane"
728                                   "(%lu < %lu)\n", __func__,
729                                   vb2_plane_size(vb, 0),
730                                   (long)q_data->sizeimage);
731                 return -EINVAL;
732         }
733 
734         vb2_set_plane_payload(vb, 0, q_data->sizeimage);
735 
736         return 0;
737 }
738 
739 static void emmaprp_buf_queue(struct vb2_buffer *vb)
740 {
741         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
742         struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
743         v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
744 }
745 
746 static struct vb2_ops emmaprp_qops = {
747         .queue_setup     = emmaprp_queue_setup,
748         .buf_prepare     = emmaprp_buf_prepare,
749         .buf_queue       = emmaprp_buf_queue,
750 };
751 
752 static int queue_init(void *priv, struct vb2_queue *src_vq,
753                       struct vb2_queue *dst_vq)
754 {
755         struct emmaprp_ctx *ctx = priv;
756         int ret;
757 
758         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
759         src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
760         src_vq->drv_priv = ctx;
761         src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
762         src_vq->ops = &emmaprp_qops;
763         src_vq->mem_ops = &vb2_dma_contig_memops;
764         src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
765         src_vq->dev = ctx->dev->v4l2_dev.dev;
766 
767         ret = vb2_queue_init(src_vq);
768         if (ret)
769                 return ret;
770 
771         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
772         dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
773         dst_vq->drv_priv = ctx;
774         dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
775         dst_vq->ops = &emmaprp_qops;
776         dst_vq->mem_ops = &vb2_dma_contig_memops;
777         dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
778         dst_vq->dev = ctx->dev->v4l2_dev.dev;
779 
780         return vb2_queue_init(dst_vq);
781 }
782 
783 /*
784  * File operations
785  */
786 static 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         if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
799                 kfree(ctx);
800                 return -ERESTARTSYS;
801         }
802 
803         ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
804 
805         if (IS_ERR(ctx->m2m_ctx)) {
806                 int ret = PTR_ERR(ctx->m2m_ctx);
807 
808                 mutex_unlock(&pcdev->dev_mutex);
809                 kfree(ctx);
810                 return ret;
811         }
812 
813         clk_prepare_enable(pcdev->clk_emma_ipg);
814         clk_prepare_enable(pcdev->clk_emma_ahb);
815         ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
816         ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
817         mutex_unlock(&pcdev->dev_mutex);
818 
819         dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
820 
821         return 0;
822 }
823 
824 static int emmaprp_release(struct file *file)
825 {
826         struct emmaprp_dev *pcdev = video_drvdata(file);
827         struct emmaprp_ctx *ctx = file->private_data;
828 
829         dprintk(pcdev, "Releasing instance %p\n", ctx);
830 
831         mutex_lock(&pcdev->dev_mutex);
832         clk_disable_unprepare(pcdev->clk_emma_ahb);
833         clk_disable_unprepare(pcdev->clk_emma_ipg);
834         v4l2_m2m_ctx_release(ctx->m2m_ctx);
835         mutex_unlock(&pcdev->dev_mutex);
836         kfree(ctx);
837 
838         return 0;
839 }
840 
841 static unsigned int emmaprp_poll(struct file *file,
842                                  struct poll_table_struct *wait)
843 {
844         struct emmaprp_dev *pcdev = video_drvdata(file);
845         struct emmaprp_ctx *ctx = file->private_data;
846         unsigned int res;
847 
848         mutex_lock(&pcdev->dev_mutex);
849         res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
850         mutex_unlock(&pcdev->dev_mutex);
851         return res;
852 }
853 
854 static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
855 {
856         struct emmaprp_dev *pcdev = video_drvdata(file);
857         struct emmaprp_ctx *ctx = file->private_data;
858         int ret;
859 
860         if (mutex_lock_interruptible(&pcdev->dev_mutex))
861                 return -ERESTARTSYS;
862         ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
863         mutex_unlock(&pcdev->dev_mutex);
864         return ret;
865 }
866 
867 static const struct v4l2_file_operations emmaprp_fops = {
868         .owner          = THIS_MODULE,
869         .open           = emmaprp_open,
870         .release        = emmaprp_release,
871         .poll           = emmaprp_poll,
872         .unlocked_ioctl = video_ioctl2,
873         .mmap           = emmaprp_mmap,
874 };
875 
876 static struct video_device emmaprp_videodev = {
877         .name           = MEM2MEM_NAME,
878         .fops           = &emmaprp_fops,
879         .ioctl_ops      = &emmaprp_ioctl_ops,
880         .minor          = -1,
881         .release        = video_device_release,
882         .vfl_dir        = VFL_DIR_M2M,
883 };
884 
885 static struct v4l2_m2m_ops m2m_ops = {
886         .device_run     = emmaprp_device_run,
887         .job_abort      = emmaprp_job_abort,
888         .lock           = emmaprp_lock,
889         .unlock         = emmaprp_unlock,
890 };
891 
892 static int emmaprp_probe(struct platform_device *pdev)
893 {
894         struct emmaprp_dev *pcdev;
895         struct video_device *vfd;
896         struct resource *res;
897         int irq, ret;
898 
899         pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
900         if (!pcdev)
901                 return -ENOMEM;
902 
903         spin_lock_init(&pcdev->irqlock);
904 
905         pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
906         if (IS_ERR(pcdev->clk_emma_ipg)) {
907                 return PTR_ERR(pcdev->clk_emma_ipg);
908         }
909 
910         pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
911         if (IS_ERR(pcdev->clk_emma_ahb))
912                 return PTR_ERR(pcdev->clk_emma_ahb);
913 
914         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
915         pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res);
916         if (IS_ERR(pcdev->base_emma))
917                 return PTR_ERR(pcdev->base_emma);
918 
919         ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
920         if (ret)
921                 return ret;
922 
923         mutex_init(&pcdev->dev_mutex);
924 
925         vfd = video_device_alloc();
926         if (!vfd) {
927                 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
928                 ret = -ENOMEM;
929                 goto unreg_dev;
930         }
931 
932         *vfd = emmaprp_videodev;
933         vfd->lock = &pcdev->dev_mutex;
934         vfd->v4l2_dev = &pcdev->v4l2_dev;
935 
936         video_set_drvdata(vfd, pcdev);
937         snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
938         pcdev->vfd = vfd;
939         v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
940                         " Device registered as /dev/video%d\n", vfd->num);
941 
942         platform_set_drvdata(pdev, pcdev);
943 
944         irq = platform_get_irq(pdev, 0);
945         ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
946                                dev_name(&pdev->dev), pcdev);
947         if (ret)
948                 goto rel_vdev;
949 
950         pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
951         if (IS_ERR(pcdev->m2m_dev)) {
952                 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
953                 ret = PTR_ERR(pcdev->m2m_dev);
954                 goto rel_vdev;
955         }
956 
957         ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
958         if (ret) {
959                 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
960                 goto rel_m2m;
961         }
962 
963         return 0;
964 
965 
966 rel_m2m:
967         v4l2_m2m_release(pcdev->m2m_dev);
968 rel_vdev:
969         video_device_release(vfd);
970 unreg_dev:
971         v4l2_device_unregister(&pcdev->v4l2_dev);
972 
973         mutex_destroy(&pcdev->dev_mutex);
974 
975         return ret;
976 }
977 
978 static int emmaprp_remove(struct platform_device *pdev)
979 {
980         struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
981 
982         v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
983 
984         video_unregister_device(pcdev->vfd);
985         v4l2_m2m_release(pcdev->m2m_dev);
986         v4l2_device_unregister(&pcdev->v4l2_dev);
987         mutex_destroy(&pcdev->dev_mutex);
988 
989         return 0;
990 }
991 
992 static struct platform_driver emmaprp_pdrv = {
993         .probe          = emmaprp_probe,
994         .remove         = emmaprp_remove,
995         .driver         = {
996                 .name   = MEM2MEM_NAME,
997         },
998 };
999 module_platform_driver(emmaprp_pdrv);
1000 

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