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