Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

Linux/drivers/media/platform/sh_veu.c

  1 /*
  2  * sh-mobile VEU mem2mem driver
  3  *
  4  * Copyright (C) 2012 Renesas Electronics Corporation
  5  * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
  6  * Copyright (C) 2008 Magnus Damm
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the version 2 of the GNU General Public License as
 10  * published by the Free Software Foundation
 11  */
 12 
 13 #include <linux/err.h>
 14 #include <linux/fs.h>
 15 #include <linux/kernel.h>
 16 #include <linux/module.h>
 17 #include <linux/interrupt.h>
 18 #include <linux/io.h>
 19 #include <linux/platform_device.h>
 20 #include <linux/pm_runtime.h>
 21 #include <linux/slab.h>
 22 #include <linux/types.h>
 23 #include <linux/videodev2.h>
 24 
 25 #include <media/v4l2-dev.h>
 26 #include <media/v4l2-device.h>
 27 #include <media/v4l2-ioctl.h>
 28 #include <media/v4l2-mem2mem.h>
 29 #include <media/v4l2-image-sizes.h>
 30 #include <media/videobuf2-dma-contig.h>
 31 
 32 #define VEU_STR 0x00 /* start register */
 33 #define VEU_SWR 0x10 /* src: line length */
 34 #define VEU_SSR 0x14 /* src: image size */
 35 #define VEU_SAYR 0x18 /* src: y/rgb plane address */
 36 #define VEU_SACR 0x1c /* src: c plane address */
 37 #define VEU_BSSR 0x20 /* bundle mode register */
 38 #define VEU_EDWR 0x30 /* dst: line length */
 39 #define VEU_DAYR 0x34 /* dst: y/rgb plane address */
 40 #define VEU_DACR 0x38 /* dst: c plane address */
 41 #define VEU_TRCR 0x50 /* transform control */
 42 #define VEU_RFCR 0x54 /* resize scale */
 43 #define VEU_RFSR 0x58 /* resize clip */
 44 #define VEU_ENHR 0x5c /* enhance */
 45 #define VEU_FMCR 0x70 /* filter mode */
 46 #define VEU_VTCR 0x74 /* lowpass vertical */
 47 #define VEU_HTCR 0x78 /* lowpass horizontal */
 48 #define VEU_APCR 0x80 /* color match */
 49 #define VEU_ECCR 0x84 /* color replace */
 50 #define VEU_AFXR 0x90 /* fixed mode */
 51 #define VEU_SWPR 0x94 /* swap */
 52 #define VEU_EIER 0xa0 /* interrupt mask */
 53 #define VEU_EVTR 0xa4 /* interrupt event */
 54 #define VEU_STAR 0xb0 /* status */
 55 #define VEU_BSRR 0xb4 /* reset */
 56 
 57 #define VEU_MCR00 0x200 /* color conversion matrix coefficient 00 */
 58 #define VEU_MCR01 0x204 /* color conversion matrix coefficient 01 */
 59 #define VEU_MCR02 0x208 /* color conversion matrix coefficient 02 */
 60 #define VEU_MCR10 0x20c /* color conversion matrix coefficient 10 */
 61 #define VEU_MCR11 0x210 /* color conversion matrix coefficient 11 */
 62 #define VEU_MCR12 0x214 /* color conversion matrix coefficient 12 */
 63 #define VEU_MCR20 0x218 /* color conversion matrix coefficient 20 */
 64 #define VEU_MCR21 0x21c /* color conversion matrix coefficient 21 */
 65 #define VEU_MCR22 0x220 /* color conversion matrix coefficient 22 */
 66 #define VEU_COFFR 0x224 /* color conversion offset */
 67 #define VEU_CBR   0x228 /* color conversion clip */
 68 
 69 /*
 70  * 4092x4092 max size is the normal case. In some cases it can be reduced to
 71  * 2048x2048, in other cases it can be 4092x8188 or even 8188x8188.
 72  */
 73 #define MAX_W 4092
 74 #define MAX_H 4092
 75 #define MIN_W 8
 76 #define MIN_H 8
 77 #define ALIGN_W 4
 78 
 79 /* 3 buffers of 2048 x 1536 - 3 megapixels @ 16bpp */
 80 #define VIDEO_MEM_LIMIT ALIGN(2048 * 1536 * 2 * 3, 1024 * 1024)
 81 
 82 #define MEM2MEM_DEF_TRANSLEN 1
 83 
 84 struct sh_veu_dev;
 85 
 86 struct sh_veu_file {
 87         struct sh_veu_dev *veu_dev;
 88         bool cfg_needed;
 89 };
 90 
 91 struct sh_veu_format {
 92         char *name;
 93         u32 fourcc;
 94         unsigned int depth;
 95         unsigned int ydepth;
 96 };
 97 
 98 /* video data format */
 99 struct sh_veu_vfmt {
100         /* Replace with v4l2_rect */
101         struct v4l2_rect                frame;
102         unsigned int                    bytesperline;
103         unsigned int                    offset_y;
104         unsigned int                    offset_c;
105         const struct sh_veu_format      *fmt;
106 };
107 
108 struct sh_veu_dev {
109         struct v4l2_device v4l2_dev;
110         struct video_device vdev;
111         struct v4l2_m2m_dev *m2m_dev;
112         struct device *dev;
113         struct v4l2_m2m_ctx *m2m_ctx;
114         struct sh_veu_vfmt vfmt_out;
115         struct sh_veu_vfmt vfmt_in;
116         /* Only single user per direction so far */
117         struct sh_veu_file *capture;
118         struct sh_veu_file *output;
119         struct mutex fop_lock;
120         void __iomem *base;
121         struct vb2_alloc_ctx *alloc_ctx;
122         spinlock_t lock;
123         bool is_2h;
124         unsigned int xaction;
125         bool aborting;
126 };
127 
128 enum sh_veu_fmt_idx {
129         SH_VEU_FMT_NV12,
130         SH_VEU_FMT_NV16,
131         SH_VEU_FMT_NV24,
132         SH_VEU_FMT_RGB332,
133         SH_VEU_FMT_RGB444,
134         SH_VEU_FMT_RGB565,
135         SH_VEU_FMT_RGB666,
136         SH_VEU_FMT_RGB24,
137 };
138 
139 #define DEFAULT_IN_WIDTH        VGA_WIDTH
140 #define DEFAULT_IN_HEIGHT       VGA_HEIGHT
141 #define DEFAULT_IN_FMTIDX       SH_VEU_FMT_NV12
142 #define DEFAULT_OUT_WIDTH       VGA_WIDTH
143 #define DEFAULT_OUT_HEIGHT      VGA_HEIGHT
144 #define DEFAULT_OUT_FMTIDX      SH_VEU_FMT_RGB565
145 
146 /*
147  * Alignment: Y-plane should be 4-byte aligned for NV12 and NV16, and 8-byte
148  * aligned for NV24.
149  */
150 static const struct sh_veu_format sh_veu_fmt[] = {
151         [SH_VEU_FMT_NV12]   = { .ydepth = 8, .depth = 12, .name = "NV12", .fourcc = V4L2_PIX_FMT_NV12 },
152         [SH_VEU_FMT_NV16]   = { .ydepth = 8, .depth = 16, .name = "NV16", .fourcc = V4L2_PIX_FMT_NV16 },
153         [SH_VEU_FMT_NV24]   = { .ydepth = 8, .depth = 24, .name = "NV24", .fourcc = V4L2_PIX_FMT_NV24 },
154         [SH_VEU_FMT_RGB332] = { .ydepth = 8, .depth = 8, .name = "RGB332", .fourcc = V4L2_PIX_FMT_RGB332 },
155         [SH_VEU_FMT_RGB444] = { .ydepth = 16, .depth = 16, .name = "RGB444", .fourcc = V4L2_PIX_FMT_RGB444 },
156         [SH_VEU_FMT_RGB565] = { .ydepth = 16, .depth = 16, .name = "RGB565", .fourcc = V4L2_PIX_FMT_RGB565 },
157         [SH_VEU_FMT_RGB666] = { .ydepth = 32, .depth = 32, .name = "BGR666", .fourcc = V4L2_PIX_FMT_BGR666 },
158         [SH_VEU_FMT_RGB24]  = { .ydepth = 24, .depth = 24, .name = "RGB24", .fourcc = V4L2_PIX_FMT_RGB24 },
159 };
160 
161 #define DEFAULT_IN_VFMT (struct sh_veu_vfmt){                                           \
162         .frame = {                                                                      \
163                 .width = VGA_WIDTH,                                                     \
164                 .height = VGA_HEIGHT,                                                   \
165         },                                                                              \
166         .bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_IN_FMTIDX].ydepth) >> 3,        \
167         .fmt = &sh_veu_fmt[DEFAULT_IN_FMTIDX],                                          \
168 }
169 
170 #define DEFAULT_OUT_VFMT (struct sh_veu_vfmt){                                          \
171         .frame = {                                                                      \
172                 .width = VGA_WIDTH,                                                     \
173                 .height = VGA_HEIGHT,                                                   \
174         },                                                                              \
175         .bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_OUT_FMTIDX].ydepth) >> 3,       \
176         .fmt = &sh_veu_fmt[DEFAULT_OUT_FMTIDX],                                         \
177 }
178 
179 /*
180  * TODO: add support for further output formats:
181  *      SH_VEU_FMT_NV12,
182  *      SH_VEU_FMT_NV16,
183  *      SH_VEU_FMT_NV24,
184  *      SH_VEU_FMT_RGB332,
185  *      SH_VEU_FMT_RGB444,
186  *      SH_VEU_FMT_RGB666,
187  *      SH_VEU_FMT_RGB24,
188  */
189 
190 static const int sh_veu_fmt_out[] = {
191         SH_VEU_FMT_RGB565,
192 };
193 
194 /*
195  * TODO: add support for further input formats:
196  *      SH_VEU_FMT_NV16,
197  *      SH_VEU_FMT_NV24,
198  *      SH_VEU_FMT_RGB565,
199  *      SH_VEU_FMT_RGB666,
200  *      SH_VEU_FMT_RGB24,
201  */
202 static const int sh_veu_fmt_in[] = {
203         SH_VEU_FMT_NV12,
204 };
205 
206 static enum v4l2_colorspace sh_veu_4cc2cspace(u32 fourcc)
207 {
208         switch (fourcc) {
209         default:
210                 BUG();
211         case V4L2_PIX_FMT_NV12:
212         case V4L2_PIX_FMT_NV16:
213         case V4L2_PIX_FMT_NV24:
214                 return V4L2_COLORSPACE_JPEG;
215         case V4L2_PIX_FMT_RGB332:
216         case V4L2_PIX_FMT_RGB444:
217         case V4L2_PIX_FMT_RGB565:
218         case V4L2_PIX_FMT_BGR666:
219         case V4L2_PIX_FMT_RGB24:
220                 return V4L2_COLORSPACE_SRGB;
221         }
222 }
223 
224 static u32 sh_veu_reg_read(struct sh_veu_dev *veu, unsigned int reg)
225 {
226         return ioread32(veu->base + reg);
227 }
228 
229 static void sh_veu_reg_write(struct sh_veu_dev *veu, unsigned int reg,
230                              u32 value)
231 {
232         iowrite32(value, veu->base + reg);
233 }
234 
235                 /* ========== mem2mem callbacks ========== */
236 
237 static void sh_veu_job_abort(void *priv)
238 {
239         struct sh_veu_dev *veu = priv;
240 
241         /* Will cancel the transaction in the next interrupt handler */
242         veu->aborting = true;
243 }
244 
245 static void sh_veu_process(struct sh_veu_dev *veu,
246                            struct vb2_buffer *src_buf,
247                            struct vb2_buffer *dst_buf)
248 {
249         dma_addr_t addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
250 
251         sh_veu_reg_write(veu, VEU_DAYR, addr + veu->vfmt_out.offset_y);
252         sh_veu_reg_write(veu, VEU_DACR, veu->vfmt_out.offset_c ?
253                          addr + veu->vfmt_out.offset_c : 0);
254         dev_dbg(veu->dev, "%s(): dst base %lx, y: %x, c: %x\n", __func__,
255                 (unsigned long)addr,
256                 veu->vfmt_out.offset_y, veu->vfmt_out.offset_c);
257 
258         addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
259         sh_veu_reg_write(veu, VEU_SAYR, addr + veu->vfmt_in.offset_y);
260         sh_veu_reg_write(veu, VEU_SACR, veu->vfmt_in.offset_c ?
261                          addr + veu->vfmt_in.offset_c : 0);
262         dev_dbg(veu->dev, "%s(): src base %lx, y: %x, c: %x\n", __func__,
263                 (unsigned long)addr,
264                 veu->vfmt_in.offset_y, veu->vfmt_in.offset_c);
265 
266         sh_veu_reg_write(veu, VEU_STR, 1);
267 
268         sh_veu_reg_write(veu, VEU_EIER, 1); /* enable interrupt in VEU */
269 }
270 
271 /**
272  * sh_veu_device_run() - prepares and starts the device
273  *
274  * This will be called by the framework when it decides to schedule a particular
275  * instance.
276  */
277 static void sh_veu_device_run(void *priv)
278 {
279         struct sh_veu_dev *veu = priv;
280         struct vb2_buffer *src_buf, *dst_buf;
281 
282         src_buf = v4l2_m2m_next_src_buf(veu->m2m_ctx);
283         dst_buf = v4l2_m2m_next_dst_buf(veu->m2m_ctx);
284 
285         if (src_buf && dst_buf)
286                 sh_veu_process(veu, src_buf, dst_buf);
287 }
288 
289                 /* ========== video ioctls ========== */
290 
291 static bool sh_veu_is_streamer(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
292                                enum v4l2_buf_type type)
293 {
294         return (type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
295                 veu_file == veu->capture) ||
296                 (type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
297                  veu_file == veu->output);
298 }
299 
300 static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
301                              struct vb2_queue *dst_vq);
302 
303 /*
304  * It is not unusual to have video nodes open()ed multiple times. While some
305  * V4L2 operations are non-intrusive, like querying formats and various
306  * parameters, others, like setting formats, starting and stopping streaming,
307  * queuing and dequeuing buffers, directly affect hardware configuration and /
308  * or execution. This function verifies availability of the requested interface
309  * and, if available, reserves it for the requesting user.
310  */
311 static int sh_veu_stream_init(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
312                               enum v4l2_buf_type type)
313 {
314         struct sh_veu_file **stream;
315 
316         switch (type) {
317         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
318                 stream = &veu->capture;
319                 break;
320         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
321                 stream = &veu->output;
322                 break;
323         default:
324                 return -EINVAL;
325         }
326 
327         if (*stream == veu_file)
328                 return 0;
329 
330         if (*stream)
331                 return -EBUSY;
332 
333         *stream = veu_file;
334 
335         return 0;
336 }
337 
338 static int sh_veu_context_init(struct sh_veu_dev *veu)
339 {
340         if (veu->m2m_ctx)
341                 return 0;
342 
343         veu->m2m_ctx = v4l2_m2m_ctx_init(veu->m2m_dev, veu,
344                                          sh_veu_queue_init);
345 
346         return PTR_ERR_OR_ZERO(veu->m2m_ctx);
347 }
348 
349 static int sh_veu_querycap(struct file *file, void *priv,
350                            struct v4l2_capability *cap)
351 {
352         strlcpy(cap->driver, "sh-veu", sizeof(cap->driver));
353         strlcpy(cap->card, "sh-mobile VEU", sizeof(cap->card));
354         strlcpy(cap->bus_info, "platform:sh-veu", sizeof(cap->bus_info));
355         cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
356         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
357 
358         return 0;
359 }
360 
361 static int sh_veu_enum_fmt(struct v4l2_fmtdesc *f, const int *fmt, int fmt_num)
362 {
363         if (f->index >= fmt_num)
364                 return -EINVAL;
365 
366         strlcpy(f->description, sh_veu_fmt[fmt[f->index]].name, sizeof(f->description));
367         f->pixelformat = sh_veu_fmt[fmt[f->index]].fourcc;
368         return 0;
369 }
370 
371 static int sh_veu_enum_fmt_vid_cap(struct file *file, void *priv,
372                                    struct v4l2_fmtdesc *f)
373 {
374         return sh_veu_enum_fmt(f, sh_veu_fmt_out, ARRAY_SIZE(sh_veu_fmt_out));
375 }
376 
377 static int sh_veu_enum_fmt_vid_out(struct file *file, void *priv,
378                                    struct v4l2_fmtdesc *f)
379 {
380         return sh_veu_enum_fmt(f, sh_veu_fmt_in, ARRAY_SIZE(sh_veu_fmt_in));
381 }
382 
383 static struct sh_veu_vfmt *sh_veu_get_vfmt(struct sh_veu_dev *veu,
384                                            enum v4l2_buf_type type)
385 {
386         switch (type) {
387         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
388                 return &veu->vfmt_out;
389         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
390                 return &veu->vfmt_in;
391         default:
392                 return NULL;
393         }
394 }
395 
396 static int sh_veu_g_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
397 {
398         struct v4l2_pix_format *pix = &f->fmt.pix;
399         struct sh_veu_dev *veu = veu_file->veu_dev;
400         struct sh_veu_vfmt *vfmt;
401 
402         vfmt = sh_veu_get_vfmt(veu, f->type);
403 
404         pix->width              = vfmt->frame.width;
405         pix->height             = vfmt->frame.height;
406         pix->field              = V4L2_FIELD_NONE;
407         pix->pixelformat        = vfmt->fmt->fourcc;
408         pix->colorspace         = sh_veu_4cc2cspace(pix->pixelformat);
409         pix->bytesperline       = vfmt->bytesperline;
410         pix->sizeimage          = vfmt->bytesperline * pix->height *
411                 vfmt->fmt->depth / vfmt->fmt->ydepth;
412         dev_dbg(veu->dev, "%s(): type: %d, size %u @ %ux%u, fmt %x\n", __func__,
413                 f->type, pix->sizeimage, pix->width, pix->height, pix->pixelformat);
414 
415         return 0;
416 }
417 
418 static int sh_veu_g_fmt_vid_out(struct file *file, void *priv,
419                                 struct v4l2_format *f)
420 {
421         return sh_veu_g_fmt(priv, f);
422 }
423 
424 static int sh_veu_g_fmt_vid_cap(struct file *file, void *priv,
425                                 struct v4l2_format *f)
426 {
427         return sh_veu_g_fmt(priv, f);
428 }
429 
430 static int sh_veu_try_fmt(struct v4l2_format *f, const struct sh_veu_format *fmt)
431 {
432         struct v4l2_pix_format *pix = &f->fmt.pix;
433         unsigned int y_bytes_used;
434 
435         /*
436          * V4L2 specification suggests, that the driver should correct the
437          * format struct if any of the dimensions is unsupported
438          */
439         switch (pix->field) {
440         default:
441         case V4L2_FIELD_ANY:
442                 pix->field = V4L2_FIELD_NONE;
443                 /* fall through: continue handling V4L2_FIELD_NONE */
444         case V4L2_FIELD_NONE:
445                 break;
446         }
447 
448         v4l_bound_align_image(&pix->width, MIN_W, MAX_W, ALIGN_W,
449                               &pix->height, MIN_H, MAX_H, 0, 0);
450 
451         y_bytes_used = (pix->width * fmt->ydepth) >> 3;
452 
453         if (pix->bytesperline < y_bytes_used)
454                 pix->bytesperline = y_bytes_used;
455         pix->sizeimage = pix->height * pix->bytesperline * fmt->depth / fmt->ydepth;
456 
457         pix->pixelformat        = fmt->fourcc;
458         pix->colorspace         = sh_veu_4cc2cspace(pix->pixelformat);
459 
460         pr_debug("%s(): type: %d, size %u\n", __func__, f->type, pix->sizeimage);
461 
462         return 0;
463 }
464 
465 static const struct sh_veu_format *sh_veu_find_fmt(const struct v4l2_format *f)
466 {
467         const int *fmt;
468         int i, n, dflt;
469 
470         pr_debug("%s(%d;%d)\n", __func__, f->type, f->fmt.pix.field);
471 
472         switch (f->type) {
473         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
474                 fmt = sh_veu_fmt_out;
475                 n = ARRAY_SIZE(sh_veu_fmt_out);
476                 dflt = DEFAULT_OUT_FMTIDX;
477                 break;
478         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
479         default:
480                 fmt = sh_veu_fmt_in;
481                 n = ARRAY_SIZE(sh_veu_fmt_in);
482                 dflt = DEFAULT_IN_FMTIDX;
483                 break;
484         }
485 
486         for (i = 0; i < n; i++)
487                 if (sh_veu_fmt[fmt[i]].fourcc == f->fmt.pix.pixelformat)
488                         return &sh_veu_fmt[fmt[i]];
489 
490         return &sh_veu_fmt[dflt];
491 }
492 
493 static int sh_veu_try_fmt_vid_cap(struct file *file, void *priv,
494                                   struct v4l2_format *f)
495 {
496         const struct sh_veu_format *fmt;
497 
498         fmt = sh_veu_find_fmt(f);
499         if (!fmt)
500                 /* wrong buffer type */
501                 return -EINVAL;
502 
503         return sh_veu_try_fmt(f, fmt);
504 }
505 
506 static int sh_veu_try_fmt_vid_out(struct file *file, void *priv,
507                                   struct v4l2_format *f)
508 {
509         const struct sh_veu_format *fmt;
510 
511         fmt = sh_veu_find_fmt(f);
512         if (!fmt)
513                 /* wrong buffer type */
514                 return -EINVAL;
515 
516         return sh_veu_try_fmt(f, fmt);
517 }
518 
519 static void sh_veu_colour_offset(struct sh_veu_dev *veu, struct sh_veu_vfmt *vfmt)
520 {
521         /* dst_left and dst_top validity will be verified in CROP / COMPOSE */
522         unsigned int left = vfmt->frame.left & ~0x03;
523         unsigned int top = vfmt->frame.top;
524         dma_addr_t offset = ((left * veu->vfmt_out.fmt->depth) >> 3) +
525                 top * veu->vfmt_out.bytesperline;
526         unsigned int y_line;
527 
528         vfmt->offset_y = offset;
529 
530         switch (vfmt->fmt->fourcc) {
531         case V4L2_PIX_FMT_NV12:
532         case V4L2_PIX_FMT_NV16:
533         case V4L2_PIX_FMT_NV24:
534                 y_line = ALIGN(vfmt->frame.width, 16);
535                 vfmt->offset_c = offset + y_line * vfmt->frame.height;
536                 break;
537         case V4L2_PIX_FMT_RGB332:
538         case V4L2_PIX_FMT_RGB444:
539         case V4L2_PIX_FMT_RGB565:
540         case V4L2_PIX_FMT_BGR666:
541         case V4L2_PIX_FMT_RGB24:
542                 vfmt->offset_c = 0;
543                 break;
544         default:
545                 BUG();
546         }
547 }
548 
549 static int sh_veu_s_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
550 {
551         struct v4l2_pix_format *pix = &f->fmt.pix;
552         struct sh_veu_dev *veu = veu_file->veu_dev;
553         struct sh_veu_vfmt *vfmt;
554         struct vb2_queue *vq;
555         int ret = sh_veu_context_init(veu);
556         if (ret < 0)
557                 return ret;
558 
559         vq = v4l2_m2m_get_vq(veu->m2m_ctx, f->type);
560         if (!vq)
561                 return -EINVAL;
562 
563         if (vb2_is_busy(vq)) {
564                 v4l2_err(&veu_file->veu_dev->v4l2_dev, "%s queue busy\n", __func__);
565                 return -EBUSY;
566         }
567 
568         vfmt = sh_veu_get_vfmt(veu, f->type);
569         /* called after try_fmt(), hence vfmt != NULL. Implicit BUG_ON() below */
570 
571         vfmt->fmt               = sh_veu_find_fmt(f);
572         /* vfmt->fmt != NULL following the same argument as above */
573         vfmt->frame.width       = pix->width;
574         vfmt->frame.height      = pix->height;
575         vfmt->bytesperline      = pix->bytesperline;
576 
577         sh_veu_colour_offset(veu, vfmt);
578 
579         /*
580          * We could also verify and require configuration only if any parameters
581          * actually have changed, but it is unlikely, that the user requests the
582          * same configuration several times without closing the device.
583          */
584         veu_file->cfg_needed = true;
585 
586         dev_dbg(veu->dev,
587                 "Setting format for type %d, wxh: %dx%d, fmt: %x\n",
588                 f->type, pix->width, pix->height, vfmt->fmt->fourcc);
589 
590         return 0;
591 }
592 
593 static int sh_veu_s_fmt_vid_cap(struct file *file, void *priv,
594                                 struct v4l2_format *f)
595 {
596         int ret = sh_veu_try_fmt_vid_cap(file, priv, f);
597         if (ret)
598                 return ret;
599 
600         return sh_veu_s_fmt(priv, f);
601 }
602 
603 static int sh_veu_s_fmt_vid_out(struct file *file, void *priv,
604                                 struct v4l2_format *f)
605 {
606         int ret = sh_veu_try_fmt_vid_out(file, priv, f);
607         if (ret)
608                 return ret;
609 
610         return sh_veu_s_fmt(priv, f);
611 }
612 
613 static int sh_veu_reqbufs(struct file *file, void *priv,
614                           struct v4l2_requestbuffers *reqbufs)
615 {
616         struct sh_veu_file *veu_file = priv;
617         struct sh_veu_dev *veu = veu_file->veu_dev;
618         int ret = sh_veu_context_init(veu);
619         if (ret < 0)
620                 return ret;
621 
622         ret = sh_veu_stream_init(veu, veu_file, reqbufs->type);
623         if (ret < 0)
624                 return ret;
625 
626         return v4l2_m2m_reqbufs(file, veu->m2m_ctx, reqbufs);
627 }
628 
629 static int sh_veu_querybuf(struct file *file, void *priv,
630                            struct v4l2_buffer *buf)
631 {
632         struct sh_veu_file *veu_file = priv;
633 
634         if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
635                 return -EBUSY;
636 
637         return v4l2_m2m_querybuf(file, veu_file->veu_dev->m2m_ctx, buf);
638 }
639 
640 static int sh_veu_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
641 {
642         struct sh_veu_file *veu_file = priv;
643 
644         dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
645         if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
646                 return -EBUSY;
647 
648         return v4l2_m2m_qbuf(file, veu_file->veu_dev->m2m_ctx, buf);
649 }
650 
651 static int sh_veu_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
652 {
653         struct sh_veu_file *veu_file = priv;
654 
655         dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
656         if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
657                 return -EBUSY;
658 
659         return v4l2_m2m_dqbuf(file, veu_file->veu_dev->m2m_ctx, buf);
660 }
661 
662 static void sh_veu_calc_scale(struct sh_veu_dev *veu,
663                               int size_in, int size_out, int crop_out,
664                               u32 *mant, u32 *frac, u32 *rep)
665 {
666         u32 fixpoint;
667 
668         /* calculate FRAC and MANT */
669         *rep = *mant = *frac = 0;
670 
671         if (size_in == size_out) {
672                 if (crop_out != size_out)
673                         *mant = 1; /* needed for cropping */
674                 return;
675         }
676 
677         /* VEU2H special upscale */
678         if (veu->is_2h && size_out > size_in) {
679                 u32 fixpoint = (4096 * size_in) / size_out;
680                 *mant = fixpoint / 4096;
681                 *frac = (fixpoint - (*mant * 4096)) & ~0x07;
682 
683                 switch (*frac) {
684                 case 0x800:
685                         *rep = 1;
686                         break;
687                 case 0x400:
688                         *rep = 3;
689                         break;
690                 case 0x200:
691                         *rep = 7;
692                         break;
693                 }
694                 if (*rep)
695                         return;
696         }
697 
698         fixpoint = (4096 * (size_in - 1)) / (size_out + 1);
699         *mant = fixpoint / 4096;
700         *frac = fixpoint - (*mant * 4096);
701 
702         if (*frac & 0x07) {
703                 /*
704                  * FIXME: do we really have to round down twice in the
705                  * up-scaling case?
706                  */
707                 *frac &= ~0x07;
708                 if (size_out > size_in)
709                         *frac -= 8; /* round down if scaling up */
710                 else
711                         *frac += 8; /* round up if scaling down */
712         }
713 }
714 
715 static unsigned long sh_veu_scale_v(struct sh_veu_dev *veu,
716                                     int size_in, int size_out, int crop_out)
717 {
718         u32 mant, frac, value, rep;
719 
720         sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
721 
722         /* set scale */
723         value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff0000) |
724                 (((mant << 12) | frac) << 16);
725 
726         sh_veu_reg_write(veu, VEU_RFCR, value);
727 
728         /* set clip */
729         value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff0000) |
730                 (((rep << 12) | crop_out) << 16);
731 
732         sh_veu_reg_write(veu, VEU_RFSR, value);
733 
734         return ALIGN((size_in * crop_out) / size_out, 4);
735 }
736 
737 static unsigned long sh_veu_scale_h(struct sh_veu_dev *veu,
738                                     int size_in, int size_out, int crop_out)
739 {
740         u32 mant, frac, value, rep;
741 
742         sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
743 
744         /* set scale */
745         value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff) |
746                 (mant << 12) | frac;
747 
748         sh_veu_reg_write(veu, VEU_RFCR, value);
749 
750         /* set clip */
751         value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff) |
752                 (rep << 12) | crop_out;
753 
754         sh_veu_reg_write(veu, VEU_RFSR, value);
755 
756         return ALIGN((size_in * crop_out) / size_out, 4);
757 }
758 
759 static void sh_veu_configure(struct sh_veu_dev *veu)
760 {
761         u32 src_width, src_stride, src_height;
762         u32 dst_width, dst_stride, dst_height;
763         u32 real_w, real_h;
764 
765         /* reset VEU */
766         sh_veu_reg_write(veu, VEU_BSRR, 0x100);
767 
768         src_width = veu->vfmt_in.frame.width;
769         src_height = veu->vfmt_in.frame.height;
770         src_stride = ALIGN(veu->vfmt_in.frame.width, 16);
771 
772         dst_width = real_w = veu->vfmt_out.frame.width;
773         dst_height = real_h = veu->vfmt_out.frame.height;
774         /* Datasheet is unclear - whether it's always number of bytes or not */
775         dst_stride = veu->vfmt_out.bytesperline;
776 
777         /*
778          * So far real_w == dst_width && real_h == dst_height, but it wasn't
779          * necessarily the case in the original vidix driver, so, it may change
780          * here in the future too.
781          */
782         src_width = sh_veu_scale_h(veu, src_width, real_w, dst_width);
783         src_height = sh_veu_scale_v(veu, src_height, real_h, dst_height);
784 
785         sh_veu_reg_write(veu, VEU_SWR, src_stride);
786         sh_veu_reg_write(veu, VEU_SSR, src_width | (src_height << 16));
787         sh_veu_reg_write(veu, VEU_BSSR, 0); /* not using bundle mode */
788 
789         sh_veu_reg_write(veu, VEU_EDWR, dst_stride);
790         sh_veu_reg_write(veu, VEU_DACR, 0); /* unused for RGB */
791 
792         sh_veu_reg_write(veu, VEU_SWPR, 0x67);
793         sh_veu_reg_write(veu, VEU_TRCR, (6 << 16) | (0 << 14) | 2 | 4);
794 
795         if (veu->is_2h) {
796                 sh_veu_reg_write(veu, VEU_MCR00, 0x0cc5);
797                 sh_veu_reg_write(veu, VEU_MCR01, 0x0950);
798                 sh_veu_reg_write(veu, VEU_MCR02, 0x0000);
799 
800                 sh_veu_reg_write(veu, VEU_MCR10, 0x397f);
801                 sh_veu_reg_write(veu, VEU_MCR11, 0x0950);
802                 sh_veu_reg_write(veu, VEU_MCR12, 0x3ccd);
803 
804                 sh_veu_reg_write(veu, VEU_MCR20, 0x0000);
805                 sh_veu_reg_write(veu, VEU_MCR21, 0x0950);
806                 sh_veu_reg_write(veu, VEU_MCR22, 0x1023);
807 
808                 sh_veu_reg_write(veu, VEU_COFFR, 0x00800010);
809         }
810 }
811 
812 static int sh_veu_streamon(struct file *file, void *priv,
813                            enum v4l2_buf_type type)
814 {
815         struct sh_veu_file *veu_file = priv;
816 
817         if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
818                 return -EBUSY;
819 
820         if (veu_file->cfg_needed) {
821                 struct sh_veu_dev *veu = veu_file->veu_dev;
822                 veu_file->cfg_needed = false;
823                 sh_veu_configure(veu_file->veu_dev);
824                 veu->xaction = 0;
825                 veu->aborting = false;
826         }
827 
828         return v4l2_m2m_streamon(file, veu_file->veu_dev->m2m_ctx, type);
829 }
830 
831 static int sh_veu_streamoff(struct file *file, void *priv,
832                             enum v4l2_buf_type type)
833 {
834         struct sh_veu_file *veu_file = priv;
835 
836         if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
837                 return -EBUSY;
838 
839         return v4l2_m2m_streamoff(file, veu_file->veu_dev->m2m_ctx, type);
840 }
841 
842 static const struct v4l2_ioctl_ops sh_veu_ioctl_ops = {
843         .vidioc_querycap        = sh_veu_querycap,
844 
845         .vidioc_enum_fmt_vid_cap = sh_veu_enum_fmt_vid_cap,
846         .vidioc_g_fmt_vid_cap   = sh_veu_g_fmt_vid_cap,
847         .vidioc_try_fmt_vid_cap = sh_veu_try_fmt_vid_cap,
848         .vidioc_s_fmt_vid_cap   = sh_veu_s_fmt_vid_cap,
849 
850         .vidioc_enum_fmt_vid_out = sh_veu_enum_fmt_vid_out,
851         .vidioc_g_fmt_vid_out   = sh_veu_g_fmt_vid_out,
852         .vidioc_try_fmt_vid_out = sh_veu_try_fmt_vid_out,
853         .vidioc_s_fmt_vid_out   = sh_veu_s_fmt_vid_out,
854 
855         .vidioc_reqbufs         = sh_veu_reqbufs,
856         .vidioc_querybuf        = sh_veu_querybuf,
857 
858         .vidioc_qbuf            = sh_veu_qbuf,
859         .vidioc_dqbuf           = sh_veu_dqbuf,
860 
861         .vidioc_streamon        = sh_veu_streamon,
862         .vidioc_streamoff       = sh_veu_streamoff,
863 };
864 
865                 /* ========== Queue operations ========== */
866 
867 static int sh_veu_queue_setup(struct vb2_queue *vq,
868                               const struct v4l2_format *f,
869                               unsigned int *nbuffers, unsigned int *nplanes,
870                               unsigned int sizes[], void *alloc_ctxs[])
871 {
872         struct sh_veu_dev *veu = vb2_get_drv_priv(vq);
873         struct sh_veu_vfmt *vfmt;
874         unsigned int size, count = *nbuffers;
875 
876         if (f) {
877                 const struct v4l2_pix_format *pix = &f->fmt.pix;
878                 const struct sh_veu_format *fmt = sh_veu_find_fmt(f);
879                 struct v4l2_format ftmp = *f;
880 
881                 if (fmt->fourcc != pix->pixelformat)
882                         return -EINVAL;
883                 sh_veu_try_fmt(&ftmp, fmt);
884                 if (ftmp.fmt.pix.width != pix->width ||
885                     ftmp.fmt.pix.height != pix->height)
886                         return -EINVAL;
887                 size = pix->bytesperline ? pix->bytesperline * pix->height * fmt->depth / fmt->ydepth :
888                         pix->width * pix->height * fmt->depth / fmt->ydepth;
889         } else {
890                 vfmt = sh_veu_get_vfmt(veu, vq->type);
891                 size = vfmt->bytesperline * vfmt->frame.height * vfmt->fmt->depth / vfmt->fmt->ydepth;
892         }
893 
894         if (count < 2)
895                 *nbuffers = count = 2;
896 
897         if (size * count > VIDEO_MEM_LIMIT) {
898                 count = VIDEO_MEM_LIMIT / size;
899                 *nbuffers = count;
900         }
901 
902         *nplanes = 1;
903         sizes[0] = size;
904         alloc_ctxs[0] = veu->alloc_ctx;
905 
906         dev_dbg(veu->dev, "get %d buffer(s) of size %d each.\n", count, size);
907 
908         return 0;
909 }
910 
911 static int sh_veu_buf_prepare(struct vb2_buffer *vb)
912 {
913         struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
914         struct sh_veu_vfmt *vfmt;
915         unsigned int sizeimage;
916 
917         vfmt = sh_veu_get_vfmt(veu, vb->vb2_queue->type);
918         sizeimage = vfmt->bytesperline * vfmt->frame.height *
919                 vfmt->fmt->depth / vfmt->fmt->ydepth;
920 
921         if (vb2_plane_size(vb, 0) < sizeimage) {
922                 dev_dbg(veu->dev, "%s data will not fit into plane (%lu < %u)\n",
923                         __func__, vb2_plane_size(vb, 0), sizeimage);
924                 return -EINVAL;
925         }
926 
927         vb2_set_plane_payload(vb, 0, sizeimage);
928 
929         return 0;
930 }
931 
932 static void sh_veu_buf_queue(struct vb2_buffer *vb)
933 {
934         struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
935         dev_dbg(veu->dev, "%s(%d)\n", __func__, vb->v4l2_buf.type);
936         v4l2_m2m_buf_queue(veu->m2m_ctx, vb);
937 }
938 
939 static const struct vb2_ops sh_veu_qops = {
940         .queue_setup     = sh_veu_queue_setup,
941         .buf_prepare     = sh_veu_buf_prepare,
942         .buf_queue       = sh_veu_buf_queue,
943         .wait_prepare    = vb2_ops_wait_prepare,
944         .wait_finish     = vb2_ops_wait_finish,
945 };
946 
947 static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
948                              struct vb2_queue *dst_vq)
949 {
950         struct sh_veu_dev *veu = priv;
951         int ret;
952 
953         memset(src_vq, 0, sizeof(*src_vq));
954         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
955         src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
956         src_vq->drv_priv = veu;
957         src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
958         src_vq->ops = &sh_veu_qops;
959         src_vq->mem_ops = &vb2_dma_contig_memops;
960         src_vq->lock = &veu->fop_lock;
961 
962         ret = vb2_queue_init(src_vq);
963         if (ret < 0)
964                 return ret;
965 
966         memset(dst_vq, 0, sizeof(*dst_vq));
967         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
968         dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
969         dst_vq->drv_priv = veu;
970         dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
971         dst_vq->ops = &sh_veu_qops;
972         dst_vq->mem_ops = &vb2_dma_contig_memops;
973         dst_vq->lock = &veu->fop_lock;
974 
975         return vb2_queue_init(dst_vq);
976 }
977 
978                 /* ========== File operations ========== */
979 
980 static int sh_veu_open(struct file *file)
981 {
982         struct sh_veu_dev *veu = video_drvdata(file);
983         struct sh_veu_file *veu_file;
984 
985         veu_file = kzalloc(sizeof(*veu_file), GFP_KERNEL);
986         if (!veu_file)
987                 return -ENOMEM;
988 
989         veu_file->veu_dev = veu;
990         veu_file->cfg_needed = true;
991 
992         file->private_data = veu_file;
993 
994         pm_runtime_get_sync(veu->dev);
995 
996         dev_dbg(veu->dev, "Created instance %p\n", veu_file);
997 
998         return 0;
999 }
1000 
1001 static int sh_veu_release(struct file *file)
1002 {
1003         struct sh_veu_dev *veu = video_drvdata(file);
1004         struct sh_veu_file *veu_file = file->private_data;
1005 
1006         dev_dbg(veu->dev, "Releasing instance %p\n", veu_file);
1007 
1008         if (veu_file == veu->capture) {
1009                 veu->capture = NULL;
1010                 vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE));
1011         }
1012 
1013         if (veu_file == veu->output) {
1014                 veu->output = NULL;
1015                 vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT));
1016         }
1017 
1018         if (!veu->output && !veu->capture && veu->m2m_ctx) {
1019                 v4l2_m2m_ctx_release(veu->m2m_ctx);
1020                 veu->m2m_ctx = NULL;
1021         }
1022 
1023         pm_runtime_put(veu->dev);
1024 
1025         kfree(veu_file);
1026 
1027         return 0;
1028 }
1029 
1030 static unsigned int sh_veu_poll(struct file *file,
1031                                 struct poll_table_struct *wait)
1032 {
1033         struct sh_veu_file *veu_file = file->private_data;
1034 
1035         return v4l2_m2m_poll(file, veu_file->veu_dev->m2m_ctx, wait);
1036 }
1037 
1038 static int sh_veu_mmap(struct file *file, struct vm_area_struct *vma)
1039 {
1040         struct sh_veu_file *veu_file = file->private_data;
1041 
1042         return v4l2_m2m_mmap(file, veu_file->veu_dev->m2m_ctx, vma);
1043 }
1044 
1045 static const struct v4l2_file_operations sh_veu_fops = {
1046         .owner          = THIS_MODULE,
1047         .open           = sh_veu_open,
1048         .release        = sh_veu_release,
1049         .poll           = sh_veu_poll,
1050         .unlocked_ioctl = video_ioctl2,
1051         .mmap           = sh_veu_mmap,
1052 };
1053 
1054 static const struct video_device sh_veu_videodev = {
1055         .name           = "sh-veu",
1056         .fops           = &sh_veu_fops,
1057         .ioctl_ops      = &sh_veu_ioctl_ops,
1058         .minor          = -1,
1059         .release        = video_device_release_empty,
1060         .vfl_dir        = VFL_DIR_M2M,
1061 };
1062 
1063 static const struct v4l2_m2m_ops sh_veu_m2m_ops = {
1064         .device_run     = sh_veu_device_run,
1065         .job_abort      = sh_veu_job_abort,
1066 };
1067 
1068 static irqreturn_t sh_veu_bh(int irq, void *dev_id)
1069 {
1070         struct sh_veu_dev *veu = dev_id;
1071 
1072         if (veu->xaction == MEM2MEM_DEF_TRANSLEN || veu->aborting) {
1073                 v4l2_m2m_job_finish(veu->m2m_dev, veu->m2m_ctx);
1074                 veu->xaction = 0;
1075         } else {
1076                 sh_veu_device_run(veu);
1077         }
1078 
1079         return IRQ_HANDLED;
1080 }
1081 
1082 static irqreturn_t sh_veu_isr(int irq, void *dev_id)
1083 {
1084         struct sh_veu_dev *veu = dev_id;
1085         struct vb2_buffer *dst;
1086         struct vb2_buffer *src;
1087         u32 status = sh_veu_reg_read(veu, VEU_EVTR);
1088 
1089         /* bundle read mode not used */
1090         if (!(status & 1))
1091                 return IRQ_NONE;
1092 
1093         /* disable interrupt in VEU */
1094         sh_veu_reg_write(veu, VEU_EIER, 0);
1095         /* halt operation */
1096         sh_veu_reg_write(veu, VEU_STR, 0);
1097         /* ack int, write 0 to clear bits */
1098         sh_veu_reg_write(veu, VEU_EVTR, status & ~1);
1099 
1100         /* conversion completed */
1101         dst = v4l2_m2m_dst_buf_remove(veu->m2m_ctx);
1102         src = v4l2_m2m_src_buf_remove(veu->m2m_ctx);
1103         if (!src || !dst)
1104                 return IRQ_NONE;
1105 
1106         spin_lock(&veu->lock);
1107         v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
1108         v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
1109         spin_unlock(&veu->lock);
1110 
1111         veu->xaction++;
1112 
1113         return IRQ_WAKE_THREAD;
1114 }
1115 
1116 static int sh_veu_probe(struct platform_device *pdev)
1117 {
1118         struct sh_veu_dev *veu;
1119         struct resource *reg_res;
1120         struct video_device *vdev;
1121         int irq, ret;
1122 
1123         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1124         irq = platform_get_irq(pdev, 0);
1125 
1126         if (!reg_res || irq <= 0) {
1127                 dev_err(&pdev->dev, "Insufficient VEU platform information.\n");
1128                 return -ENODEV;
1129         }
1130 
1131         veu = devm_kzalloc(&pdev->dev, sizeof(*veu), GFP_KERNEL);
1132         if (!veu)
1133                 return -ENOMEM;
1134 
1135         veu->is_2h = resource_size(reg_res) == 0x22c;
1136 
1137         veu->base = devm_ioremap_resource(&pdev->dev, reg_res);
1138         if (IS_ERR(veu->base))
1139                 return PTR_ERR(veu->base);
1140 
1141         ret = devm_request_threaded_irq(&pdev->dev, irq, sh_veu_isr, sh_veu_bh,
1142                                         0, "veu", veu);
1143         if (ret < 0)
1144                 return ret;
1145 
1146         ret = v4l2_device_register(&pdev->dev, &veu->v4l2_dev);
1147         if (ret < 0) {
1148                 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1149                 return ret;
1150         }
1151 
1152         vdev = &veu->vdev;
1153 
1154         veu->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1155         if (IS_ERR(veu->alloc_ctx)) {
1156                 ret = PTR_ERR(veu->alloc_ctx);
1157                 goto einitctx;
1158         }
1159 
1160         *vdev = sh_veu_videodev;
1161         vdev->v4l2_dev = &veu->v4l2_dev;
1162         spin_lock_init(&veu->lock);
1163         mutex_init(&veu->fop_lock);
1164         vdev->lock = &veu->fop_lock;
1165 
1166         video_set_drvdata(vdev, veu);
1167 
1168         veu->dev        = &pdev->dev;
1169         veu->vfmt_out   = DEFAULT_OUT_VFMT;
1170         veu->vfmt_in    = DEFAULT_IN_VFMT;
1171 
1172         veu->m2m_dev = v4l2_m2m_init(&sh_veu_m2m_ops);
1173         if (IS_ERR(veu->m2m_dev)) {
1174                 ret = PTR_ERR(veu->m2m_dev);
1175                 v4l2_err(&veu->v4l2_dev, "Failed to init mem2mem device: %d\n", ret);
1176                 goto em2minit;
1177         }
1178 
1179         pm_runtime_enable(&pdev->dev);
1180         pm_runtime_resume(&pdev->dev);
1181 
1182         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1183         pm_runtime_suspend(&pdev->dev);
1184         if (ret < 0)
1185                 goto evidreg;
1186 
1187         return ret;
1188 
1189 evidreg:
1190         pm_runtime_disable(&pdev->dev);
1191         v4l2_m2m_release(veu->m2m_dev);
1192 em2minit:
1193         vb2_dma_contig_cleanup_ctx(veu->alloc_ctx);
1194 einitctx:
1195         v4l2_device_unregister(&veu->v4l2_dev);
1196         return ret;
1197 }
1198 
1199 static int sh_veu_remove(struct platform_device *pdev)
1200 {
1201         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1202         struct sh_veu_dev *veu = container_of(v4l2_dev,
1203                                               struct sh_veu_dev, v4l2_dev);
1204 
1205         video_unregister_device(&veu->vdev);
1206         pm_runtime_disable(&pdev->dev);
1207         v4l2_m2m_release(veu->m2m_dev);
1208         vb2_dma_contig_cleanup_ctx(veu->alloc_ctx);
1209         v4l2_device_unregister(&veu->v4l2_dev);
1210 
1211         return 0;
1212 }
1213 
1214 static struct platform_driver __refdata sh_veu_pdrv = {
1215         .remove         = sh_veu_remove,
1216         .driver         = {
1217                 .name   = "sh_veu",
1218         },
1219 };
1220 
1221 module_platform_driver_probe(sh_veu_pdrv, sh_veu_probe);
1222 
1223 MODULE_DESCRIPTION("sh-mobile VEU mem2mem driver");
1224 MODULE_AUTHOR("Guennadi Liakhovetski, <g.liakhovetski@gmx.de>");
1225 MODULE_LICENSE("GPL v2");
1226 

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