drivers/staging/media/omap4iss/iss_ipipeif.c

   1 /*
   2  * TI OMAP4 ISS V4L2 Driver - ISP IPIPEIF module
   3  *
   4  * Copyright (C) 2012 Texas Instruments, Inc.
   5  *
   6  * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/uaccess.h>
  16 #include <linux/delay.h>
  17 #include <linux/device.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/mm.h>
  20 #include <linux/sched.h>
  21
  22 #include "iss.h"
  23 #include "iss_regs.h"
  24 #include "iss_ipipeif.h"
  25
  26 static const unsigned int ipipeif_fmts[] = {
  27         MEDIA_BUS_FMT_SGRBG10_1X10,
  28         MEDIA_BUS_FMT_SRGGB10_1X10,
  29         MEDIA_BUS_FMT_SBGGR10_1X10,
  30         MEDIA_BUS_FMT_SGBRG10_1X10,
  31         MEDIA_BUS_FMT_UYVY8_1X16,
  32         MEDIA_BUS_FMT_YUYV8_1X16,
  33 };
  34
  35 /*
  36  * ipipeif_print_status - Print current IPIPEIF Module register values.
  37  * @ipipeif: Pointer to ISS ISP IPIPEIF device.
  38  *
  39  * Also prints other debug information stored in the IPIPEIF module.
  40  */
  41 #define IPIPEIF_PRINT_REGISTER(iss, name)\
  42         dev_dbg(iss->dev, "###IPIPEIF " #name "=0x%08x\n", \
  43                 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_##name))
  44
  45 #define ISIF_PRINT_REGISTER(iss, name)\
  46         dev_dbg(iss->dev, "###ISIF " #name "=0x%08x\n", \
  47                 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_##name))
  48
  49 #define ISP5_PRINT_REGISTER(iss, name)\
  50         dev_dbg(iss->dev, "###ISP5 " #name "=0x%08x\n", \
  51                 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_##name))
  52
  53 static void ipipeif_print_status(struct iss_ipipeif_device *ipipeif)
  54 {
  55         struct iss_device *iss = to_iss_device(ipipeif);
  56
  57         dev_dbg(iss->dev, "-------------IPIPEIF Register dump-------------\n");
  58
  59         IPIPEIF_PRINT_REGISTER(iss, CFG1);
  60         IPIPEIF_PRINT_REGISTER(iss, CFG2);
  61
  62         ISIF_PRINT_REGISTER(iss, SYNCEN);
  63         ISIF_PRINT_REGISTER(iss, CADU);
  64         ISIF_PRINT_REGISTER(iss, CADL);
  65         ISIF_PRINT_REGISTER(iss, MODESET);
  66         ISIF_PRINT_REGISTER(iss, CCOLP);
  67         ISIF_PRINT_REGISTER(iss, SPH);
  68         ISIF_PRINT_REGISTER(iss, LNH);
  69         ISIF_PRINT_REGISTER(iss, LNV);
  70         ISIF_PRINT_REGISTER(iss, VDINT(0));
  71         ISIF_PRINT_REGISTER(iss, HSIZE);
  72
  73         ISP5_PRINT_REGISTER(iss, SYSCONFIG);
  74         ISP5_PRINT_REGISTER(iss, CTRL);
  75         ISP5_PRINT_REGISTER(iss, IRQSTATUS(0));
  76         ISP5_PRINT_REGISTER(iss, IRQENABLE_SET(0));
  77         ISP5_PRINT_REGISTER(iss, IRQENABLE_CLR(0));
  78
  79         dev_dbg(iss->dev, "-----------------------------------------------\n");
  80 }
  81
  82 static void ipipeif_write_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
  83 {
  84         struct iss_device *iss = to_iss_device(ipipeif);
  85
  86         iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_SYNCEN,
  87                        ISIF_SYNCEN_DWEN, enable ? ISIF_SYNCEN_DWEN : 0);
  88 }
  89
  90 /*
  91  * ipipeif_enable - Enable/Disable IPIPEIF.
  92  * @enable: enable flag
  93  *
  94  */
  95 static void ipipeif_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
  96 {
  97         struct iss_device *iss = to_iss_device(ipipeif);
  98
  99         iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_SYNCEN,
 100                        ISIF_SYNCEN_SYEN, enable ? ISIF_SYNCEN_SYEN : 0);
 101 }
 102
 103 /* -----------------------------------------------------------------------------
 104  * Format- and pipeline-related configuration helpers
 105  */
 106
 107 /*
 108  * ipipeif_set_outaddr - Set memory address to save output image
 109  * @ipipeif: Pointer to ISP IPIPEIF device.
 110  * @addr: 32-bit memory address aligned on 32 byte boundary.
 111  *
 112  * Sets the memory address where the output will be saved.
 113  */
 114 static void ipipeif_set_outaddr(struct iss_ipipeif_device *ipipeif, u32 addr)
 115 {
 116         struct iss_device *iss = to_iss_device(ipipeif);
 117
 118         /* Save address split in Base Address H & L */
 119         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CADU,
 120                       (addr >> (16 + 5)) & ISIF_CADU_MASK);
 121         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CADL,
 122                       (addr >> 5) & ISIF_CADL_MASK);
 123 }
 124
 125 static void ipipeif_configure(struct iss_ipipeif_device *ipipeif)
 126 {
 127         struct iss_device *iss = to_iss_device(ipipeif);
 128         const struct iss_format_info *info;
 129         struct v4l2_mbus_framefmt *format;
 130         u32 isif_ccolp = 0;
 131
 132         omap4iss_configure_bridge(iss, ipipeif->input);
 133
 134         /* IPIPEIF_PAD_SINK */
 135         format = &ipipeif->formats[IPIPEIF_PAD_SINK];
 136
 137         /* IPIPEIF with YUV422 input from ISIF */
 138         iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG1,
 139                     IPIPEIF_CFG1_INPSRC1_MASK | IPIPEIF_CFG1_INPSRC2_MASK);
 140
 141         /* Select ISIF/IPIPEIF input format */
 142         switch (format->code) {
 143         case MEDIA_BUS_FMT_UYVY8_1X16:
 144         case MEDIA_BUS_FMT_YUYV8_1X16:
 145                 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_MODESET,
 146                                ISIF_MODESET_CCDMD | ISIF_MODESET_INPMOD_MASK |
 147                                ISIF_MODESET_CCDW_MASK,
 148                                ISIF_MODESET_INPMOD_YCBCR16);
 149
 150                 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG2,
 151                                IPIPEIF_CFG2_YUV8, IPIPEIF_CFG2_YUV16);
 152
 153                 break;
 154         case MEDIA_BUS_FMT_SGRBG10_1X10:
 155                 isif_ccolp = ISIF_CCOLP_CP0_F0_GR |
 156                         ISIF_CCOLP_CP1_F0_R |
 157                         ISIF_CCOLP_CP2_F0_B |
 158                         ISIF_CCOLP_CP3_F0_GB;
 159                 goto cont_raw;
 160         case MEDIA_BUS_FMT_SRGGB10_1X10:
 161                 isif_ccolp = ISIF_CCOLP_CP0_F0_R |
 162                         ISIF_CCOLP_CP1_F0_GR |
 163                         ISIF_CCOLP_CP2_F0_GB |
 164                         ISIF_CCOLP_CP3_F0_B;
 165                 goto cont_raw;
 166         case MEDIA_BUS_FMT_SBGGR10_1X10:
 167                 isif_ccolp = ISIF_CCOLP_CP0_F0_B |
 168                         ISIF_CCOLP_CP1_F0_GB |
 169                         ISIF_CCOLP_CP2_F0_GR |
 170                         ISIF_CCOLP_CP3_F0_R;
 171                 goto cont_raw;
 172         case MEDIA_BUS_FMT_SGBRG10_1X10:
 173                 isif_ccolp = ISIF_CCOLP_CP0_F0_GB |
 174                         ISIF_CCOLP_CP1_F0_B |
 175                         ISIF_CCOLP_CP2_F0_R |
 176                         ISIF_CCOLP_CP3_F0_GR;
 177 cont_raw:
 178                 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG2,
 179                             IPIPEIF_CFG2_YUV16);
 180
 181                 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_MODESET,
 182                                ISIF_MODESET_CCDMD | ISIF_MODESET_INPMOD_MASK |
 183                                ISIF_MODESET_CCDW_MASK, ISIF_MODESET_INPMOD_RAW |
 184                                ISIF_MODESET_CCDW_2BIT);
 185
 186                 info = omap4iss_video_format_info(format->code);
 187                 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CGAMMAWD,
 188                                ISIF_CGAMMAWD_GWDI_MASK,
 189                                ISIF_CGAMMAWD_GWDI(info->bpp));
 190
 191                 /* Set RAW Bayer pattern */
 192                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CCOLP,
 193                               isif_ccolp);
 194                 break;
 195         }
 196
 197         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_SPH, 0 & ISIF_SPH_MASK);
 198         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_LNH,
 199                       (format->width - 1) & ISIF_LNH_MASK);
 200         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_LNV,
 201                       (format->height - 1) & ISIF_LNV_MASK);
 202
 203         /* Generate ISIF0 on the last line of the image */
 204         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_VDINT(0),
 205                       format->height - 1);
 206
 207         /* IPIPEIF_PAD_SOURCE_ISIF_SF */
 208         format = &ipipeif->formats[IPIPEIF_PAD_SOURCE_ISIF_SF];
 209
 210         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_HSIZE,
 211                       (ipipeif->video_out.bpl_value >> 5) &
 212                       ISIF_HSIZE_HSIZE_MASK);
 213
 214         /* IPIPEIF_PAD_SOURCE_VP */
 215         /* Do nothing? */
 216 }
 217
 218 /* -----------------------------------------------------------------------------
 219  * Interrupt handling
 220  */
 221
 222 static void ipipeif_isr_buffer(struct iss_ipipeif_device *ipipeif)
 223 {
 224         struct iss_buffer *buffer;
 225
 226         /* The ISIF generates VD0 interrupts even when writes are disabled.
 227          * deal with it anyway). Disabling the ISIF when no buffer is available
 228          * is thus not be enough, we need to handle the situation explicitly.
 229          */
 230         if (list_empty(&ipipeif->video_out.dmaqueue))
 231                 return;
 232
 233         ipipeif_write_enable(ipipeif, 0);
 234
 235         buffer = omap4iss_video_buffer_next(&ipipeif->video_out);
 236         if (!buffer)
 237                 return;
 238
 239         ipipeif_set_outaddr(ipipeif, buffer->iss_addr);
 240
 241         ipipeif_write_enable(ipipeif, 1);
 242 }
 243
 244 /*
 245  * omap4iss_ipipeif_isr - Configure ipipeif during interframe time.
 246  * @ipipeif: Pointer to ISP IPIPEIF device.
 247  * @events: IPIPEIF events
 248  */
 249 void omap4iss_ipipeif_isr(struct iss_ipipeif_device *ipipeif, u32 events)
 250 {
 251         if (omap4iss_module_sync_is_stopping(&ipipeif->wait,
 252                                              &ipipeif->stopping))
 253                 return;
 254
 255         if ((events & ISP5_IRQ_ISIF_INT(0)) &&
 256             (ipipeif->output & IPIPEIF_OUTPUT_MEMORY))
 257                 ipipeif_isr_buffer(ipipeif);
 258 }
 259
 260 /* -----------------------------------------------------------------------------
 261  * ISP video operations
 262  */
 263
 264 static int ipipeif_video_queue(struct iss_video *video,
 265                                struct iss_buffer *buffer)
 266 {
 267         struct iss_ipipeif_device *ipipeif = container_of(video,
 268                                 struct iss_ipipeif_device, video_out);
 269
 270         if (!(ipipeif->output & IPIPEIF_OUTPUT_MEMORY))
 271                 return -ENODEV;
 272
 273         ipipeif_set_outaddr(ipipeif, buffer->iss_addr);
 274
 275         /*
 276          * If streaming was enabled before there was a buffer queued
 277          * or underrun happened in the ISR, the hardware was not enabled
 278          * and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set.
 279          * Enable it now.
 280          */
 281         if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
 282                 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
 283                         ipipeif_write_enable(ipipeif, 1);
 284                 ipipeif_enable(ipipeif, 1);
 285                 iss_video_dmaqueue_flags_clr(video);
 286         }
 287
 288         return 0;
 289 }
 290
 291 static const struct iss_video_operations ipipeif_video_ops = {
 292         .queue = ipipeif_video_queue,
 293 };
 294
 295 /* -----------------------------------------------------------------------------
 296  * V4L2 subdev operations
 297  */
 298
 299 #define IPIPEIF_DRV_SUBCLK_MASK (OMAP4_ISS_ISP_SUBCLK_IPIPEIF |\
 300                                  OMAP4_ISS_ISP_SUBCLK_ISIF)
 301 /*
 302  * ipipeif_set_stream - Enable/Disable streaming on the IPIPEIF module
 303  * @sd: ISP IPIPEIF V4L2 subdevice
 304  * @enable: Enable/disable stream
 305  */
 306 static int ipipeif_set_stream(struct v4l2_subdev *sd, int enable)
 307 {
 308         struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 309         struct iss_device *iss = to_iss_device(ipipeif);
 310         struct iss_video *video_out = &ipipeif->video_out;
 311         int ret = 0;
 312
 313         if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED) {
 314                 if (enable == ISS_PIPELINE_STREAM_STOPPED)
 315                         return 0;
 316
 317                 omap4iss_isp_subclk_enable(iss, IPIPEIF_DRV_SUBCLK_MASK);
 318         }
 319
 320         switch (enable) {
 321         case ISS_PIPELINE_STREAM_CONTINUOUS:
 322
 323                 ipipeif_configure(ipipeif);
 324                 ipipeif_print_status(ipipeif);
 325
 326                 /*
 327                  * When outputting to memory with no buffer available, let the
 328                  * buffer queue handler start the hardware. A DMA queue flag
 329                  * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
 330                  * a buffer available.
 331                  */
 332                 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY &&
 333                     !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
 334                         break;
 335
 336                 atomic_set(&ipipeif->stopping, 0);
 337                 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
 338                         ipipeif_write_enable(ipipeif, 1);
 339                 ipipeif_enable(ipipeif, 1);
 340                 iss_video_dmaqueue_flags_clr(video_out);
 341                 break;
 342
 343         case ISS_PIPELINE_STREAM_STOPPED:
 344                 if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED)
 345                         return 0;
 346                 if (omap4iss_module_sync_idle(&sd->entity, &ipipeif->wait,
 347                                               &ipipeif->stopping))
 348                         ret = -ETIMEDOUT;
 349
 350                 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
 351                         ipipeif_write_enable(ipipeif, 0);
 352                 ipipeif_enable(ipipeif, 0);
 353                 omap4iss_isp_subclk_disable(iss, IPIPEIF_DRV_SUBCLK_MASK);
 354                 iss_video_dmaqueue_flags_clr(video_out);
 355                 break;
 356         }
 357
 358         ipipeif->state = enable;
 359         return ret;
 360 }
 361
 362 static struct v4l2_mbus_framefmt *
 363 __ipipeif_get_format(struct iss_ipipeif_device *ipipeif,
 364                      struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 365                      enum v4l2_subdev_format_whence which)
 366 {
 367         if (which == V4L2_SUBDEV_FORMAT_TRY)
 368                 return v4l2_subdev_get_try_format(&ipipeif->subdev, cfg, pad);
 369         return &ipipeif->formats[pad];
 370 }
 371
 372 /*
 373  * ipipeif_try_format - Try video format on a pad
 374  * @ipipeif: ISS IPIPEIF device
 375  * @cfg: V4L2 subdev pad config
 376  * @pad: Pad number
 377  * @fmt: Format
 378  */
 379 static void
 380 ipipeif_try_format(struct iss_ipipeif_device *ipipeif,
 381                    struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 382                    struct v4l2_mbus_framefmt *fmt,
 383                    enum v4l2_subdev_format_whence which)
 384 {
 385         struct v4l2_mbus_framefmt *format;
 386         unsigned int width = fmt->width;
 387         unsigned int height = fmt->height;
 388         unsigned int i;
 389
 390         switch (pad) {
 391         case IPIPEIF_PAD_SINK:
 392                 /* TODO: If the IPIPEIF output formatter pad is connected
 393                  * directly to the resizer, only YUV formats can be used.
 394                  */
 395                 for (i = 0; i < ARRAY_SIZE(ipipeif_fmts); i++) {
 396                         if (fmt->code == ipipeif_fmts[i])
 397                                 break;
 398                 }
 399
 400                 /* If not found, use SGRBG10 as default */
 401                 if (i >= ARRAY_SIZE(ipipeif_fmts))
 402                         fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
 403
 404                 /* Clamp the input size. */
 405                 fmt->width = clamp_t(u32, width, 1, 8192);
 406                 fmt->height = clamp_t(u32, height, 1, 8192);
 407                 break;
 408
 409         case IPIPEIF_PAD_SOURCE_ISIF_SF:
 410                 format = __ipipeif_get_format(ipipeif, cfg, IPIPEIF_PAD_SINK,
 411                                               which);
 412                 memcpy(fmt, format, sizeof(*fmt));
 413
 414                 /* The data formatter truncates the number of horizontal output
 415                  * pixels to a multiple of 16. To avoid clipping data, allow
 416                  * callers to request an output size bigger than the input size
 417                  * up to the nearest multiple of 16.
 418                  */
 419                 fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15);
 420                 fmt->width &= ~15;
 421                 fmt->height = clamp_t(u32, height, 32, fmt->height);
 422                 break;
 423
 424         case IPIPEIF_PAD_SOURCE_VP:
 425                 format = __ipipeif_get_format(ipipeif, cfg, IPIPEIF_PAD_SINK,
 426                                               which);
 427                 memcpy(fmt, format, sizeof(*fmt));
 428
 429                 fmt->width = clamp_t(u32, width, 32, fmt->width);
 430                 fmt->height = clamp_t(u32, height, 32, fmt->height);
 431                 break;
 432         }
 433
 434         /* Data is written to memory unpacked, each 10-bit or 12-bit pixel is
 435          * stored on 2 bytes.
 436          */
 437         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 438         fmt->field = V4L2_FIELD_NONE;
 439 }
 440
 441 /*
 442  * ipipeif_enum_mbus_code - Handle pixel format enumeration
 443  * @sd     : pointer to v4l2 subdev structure
 444  * @cfg    : V4L2 subdev pad config
 445  * @code   : pointer to v4l2_subdev_mbus_code_enum structure
 446  * return -EINVAL or zero on success
 447  */
 448 static int ipipeif_enum_mbus_code(struct v4l2_subdev *sd,
 449                                   struct v4l2_subdev_pad_config *cfg,
 450                                   struct v4l2_subdev_mbus_code_enum *code)
 451 {
 452         struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 453         struct v4l2_mbus_framefmt *format;
 454
 455         switch (code->pad) {
 456         case IPIPEIF_PAD_SINK:
 457                 if (code->index >= ARRAY_SIZE(ipipeif_fmts))
 458                         return -EINVAL;
 459
 460                 code->code = ipipeif_fmts[code->index];
 461                 break;
 462
 463         case IPIPEIF_PAD_SOURCE_ISIF_SF:
 464         case IPIPEIF_PAD_SOURCE_VP:
 465                 /* No format conversion inside IPIPEIF */
 466                 if (code->index != 0)
 467                         return -EINVAL;
 468
 469                 format = __ipipeif_get_format(ipipeif, cfg, IPIPEIF_PAD_SINK,
 470                                               code->which);
 471
 472                 code->code = format->code;
 473                 break;
 474
 475         default:
 476                 return -EINVAL;
 477         }
 478
 479         return 0;
 480 }
 481
 482 static int ipipeif_enum_frame_size(struct v4l2_subdev *sd,
 483                                    struct v4l2_subdev_pad_config *cfg,
 484                                    struct v4l2_subdev_frame_size_enum *fse)
 485 {
 486         struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 487         struct v4l2_mbus_framefmt format;
 488
 489         if (fse->index != 0)
 490                 return -EINVAL;
 491
 492         format.code = fse->code;
 493         format.width = 1;
 494         format.height = 1;
 495         ipipeif_try_format(ipipeif, cfg, fse->pad, &format, fse->which);
 496         fse->min_width = format.width;
 497         fse->min_height = format.height;
 498
 499         if (format.code != fse->code)
 500                 return -EINVAL;
 501
 502         format.code = fse->code;
 503         format.width = -1;
 504         format.height = -1;
 505         ipipeif_try_format(ipipeif, cfg, fse->pad, &format, fse->which);
 506         fse->max_width = format.width;
 507         fse->max_height = format.height;
 508
 509         return 0;
 510 }
 511
 512 /*
 513  * ipipeif_get_format - Retrieve the video format on a pad
 514  * @sd : ISP IPIPEIF V4L2 subdevice
 515  * @cfg: V4L2 subdev pad config
 516  * @fmt: Format
 517  *
 518  * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 519  * to the format type.
 520  */
 521 static int ipipeif_get_format(struct v4l2_subdev *sd,
 522                               struct v4l2_subdev_pad_config *cfg,
 523                               struct v4l2_subdev_format *fmt)
 524 {
 525         struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 526         struct v4l2_mbus_framefmt *format;
 527
 528         format = __ipipeif_get_format(ipipeif, cfg, fmt->pad, fmt->which);
 529         if (!format)
 530                 return -EINVAL;
 531
 532         fmt->format = *format;
 533         return 0;
 534 }
 535
 536 /*
 537  * ipipeif_set_format - Set the video format on a pad
 538  * @sd : ISP IPIPEIF V4L2 subdevice
 539  * @cfg: V4L2 subdev pad config
 540  * @fmt: Format
 541  *
 542  * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 543  * to the format type.
 544  */
 545 static int ipipeif_set_format(struct v4l2_subdev *sd,
 546                               struct v4l2_subdev_pad_config *cfg,
 547                               struct v4l2_subdev_format *fmt)
 548 {
 549         struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 550         struct v4l2_mbus_framefmt *format;
 551
 552         format = __ipipeif_get_format(ipipeif, cfg, fmt->pad, fmt->which);
 553         if (!format)
 554                 return -EINVAL;
 555
 556         ipipeif_try_format(ipipeif, cfg, fmt->pad, &fmt->format, fmt->which);
 557         *format = fmt->format;
 558
 559         /* Propagate the format from sink to source */
 560         if (fmt->pad == IPIPEIF_PAD_SINK) {
 561                 format = __ipipeif_get_format(ipipeif, cfg,
 562                                               IPIPEIF_PAD_SOURCE_ISIF_SF,
 563                                               fmt->which);
 564                 *format = fmt->format;
 565                 ipipeif_try_format(ipipeif, cfg, IPIPEIF_PAD_SOURCE_ISIF_SF,
 566                                    format, fmt->which);
 567
 568                 format = __ipipeif_get_format(ipipeif, cfg,
 569                                               IPIPEIF_PAD_SOURCE_VP,
 570                                               fmt->which);
 571                 *format = fmt->format;
 572                 ipipeif_try_format(ipipeif, cfg, IPIPEIF_PAD_SOURCE_VP, format,
 573                                    fmt->which);
 574         }
 575
 576         return 0;
 577 }
 578
 579 static int ipipeif_link_validate(struct v4l2_subdev *sd,
 580                                  struct media_link *link,
 581                                  struct v4l2_subdev_format *source_fmt,
 582                                  struct v4l2_subdev_format *sink_fmt)
 583 {
 584         /* Check if the two ends match */
 585         if (source_fmt->format.width != sink_fmt->format.width ||
 586             source_fmt->format.height != sink_fmt->format.height)
 587                 return -EPIPE;
 588
 589         if (source_fmt->format.code != sink_fmt->format.code)
 590                 return -EPIPE;
 591
 592         return 0;
 593 }
 594
 595 /*
 596  * ipipeif_init_formats - Initialize formats on all pads
 597  * @sd: ISP IPIPEIF V4L2 subdevice
 598  * @fh: V4L2 subdev file handle
 599  *
 600  * Initialize all pad formats with default values. If fh is not NULL, try
 601  * formats are initialized on the file handle. Otherwise active formats are
 602  * initialized on the device.
 603  */
 604 static int ipipeif_init_formats(struct v4l2_subdev *sd,
 605                                 struct v4l2_subdev_fh *fh)
 606 {
 607         struct v4l2_subdev_format format;
 608
 609         memset(&format, 0, sizeof(format));
 610         format.pad = IPIPEIF_PAD_SINK;
 611         format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 612         format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
 613         format.format.width = 4096;
 614         format.format.height = 4096;
 615         ipipeif_set_format(sd, fh ? fh->pad : NULL, &format);
 616
 617         return 0;
 618 }
 619
 620 /* V4L2 subdev video operations */
 621 static const struct v4l2_subdev_video_ops ipipeif_v4l2_video_ops = {
 622         .s_stream = ipipeif_set_stream,
 623 };
 624
 625 /* V4L2 subdev pad operations */
 626 static const struct v4l2_subdev_pad_ops ipipeif_v4l2_pad_ops = {
 627         .enum_mbus_code = ipipeif_enum_mbus_code,
 628         .enum_frame_size = ipipeif_enum_frame_size,
 629         .get_fmt = ipipeif_get_format,
 630         .set_fmt = ipipeif_set_format,
 631         .link_validate = ipipeif_link_validate,
 632 };
 633
 634 /* V4L2 subdev operations */
 635 static const struct v4l2_subdev_ops ipipeif_v4l2_ops = {
 636         .video = &ipipeif_v4l2_video_ops,
 637         .pad = &ipipeif_v4l2_pad_ops,
 638 };
 639
 640 /* V4L2 subdev internal operations */
 641 static const struct v4l2_subdev_internal_ops ipipeif_v4l2_internal_ops = {
 642         .open = ipipeif_init_formats,
 643 };
 644
 645 /* -----------------------------------------------------------------------------
 646  * Media entity operations
 647  */
 648
 649 /*
 650  * ipipeif_link_setup - Setup IPIPEIF connections
 651  * @entity: IPIPEIF media entity
 652  * @local: Pad at the local end of the link
 653  * @remote: Pad at the remote end of the link
 654  * @flags: Link flags
 655  *
 656  * return -EINVAL or zero on success
 657  */
 658 static int ipipeif_link_setup(struct media_entity *entity,
 659                               const struct media_pad *local,
 660                               const struct media_pad *remote, u32 flags)
 661 {
 662         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 663         struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
 664         struct iss_device *iss = to_iss_device(ipipeif);
 665
 666         switch (local->index | media_entity_type(remote->entity)) {
 667         case IPIPEIF_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
 668                 /* Read from the sensor CSI2a or CSI2b. */
 669                 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
 670                         ipipeif->input = IPIPEIF_INPUT_NONE;
 671                         break;
 672                 }
 673
 674                 if (ipipeif->input != IPIPEIF_INPUT_NONE)
 675                         return -EBUSY;
 676
 677                 if (remote->entity == &iss->csi2a.subdev.entity)
 678                         ipipeif->input = IPIPEIF_INPUT_CSI2A;
 679                 else if (remote->entity == &iss->csi2b.subdev.entity)
 680                         ipipeif->input = IPIPEIF_INPUT_CSI2B;
 681
 682                 break;
 683
 684         case IPIPEIF_PAD_SOURCE_ISIF_SF | MEDIA_ENT_T_DEVNODE:
 685                 /* Write to memory */
 686                 if (flags & MEDIA_LNK_FL_ENABLED) {
 687                         if (ipipeif->output & ~IPIPEIF_OUTPUT_MEMORY)
 688                                 return -EBUSY;
 689                         ipipeif->output |= IPIPEIF_OUTPUT_MEMORY;
 690                 } else {
 691                         ipipeif->output &= ~IPIPEIF_OUTPUT_MEMORY;
 692                 }
 693                 break;
 694
 695         case IPIPEIF_PAD_SOURCE_VP | MEDIA_ENT_T_V4L2_SUBDEV:
 696                 /* Send to IPIPE/RESIZER */
 697                 if (flags & MEDIA_LNK_FL_ENABLED) {
 698                         if (ipipeif->output & ~IPIPEIF_OUTPUT_VP)
 699                                 return -EBUSY;
 700                         ipipeif->output |= IPIPEIF_OUTPUT_VP;
 701                 } else {
 702                         ipipeif->output &= ~IPIPEIF_OUTPUT_VP;
 703                 }
 704                 break;
 705
 706         default:
 707                 return -EINVAL;
 708         }
 709
 710         return 0;
 711 }
 712
 713 /* media operations */
 714 static const struct media_entity_operations ipipeif_media_ops = {
 715         .link_setup = ipipeif_link_setup,
 716         .link_validate = v4l2_subdev_link_validate,
 717 };
 718
 719 /*
 720  * ipipeif_init_entities - Initialize V4L2 subdev and media entity
 721  * @ipipeif: ISS ISP IPIPEIF module
 722  *
 723  * Return 0 on success and a negative error code on failure.
 724  */
 725 static int ipipeif_init_entities(struct iss_ipipeif_device *ipipeif)
 726 {
 727         struct v4l2_subdev *sd = &ipipeif->subdev;
 728         struct media_pad *pads = ipipeif->pads;
 729         struct media_entity *me = &sd->entity;
 730         int ret;
 731
 732         ipipeif->input = IPIPEIF_INPUT_NONE;
 733
 734         v4l2_subdev_init(sd, &ipipeif_v4l2_ops);
 735         sd->internal_ops = &ipipeif_v4l2_internal_ops;
 736         strlcpy(sd->name, "OMAP4 ISS ISP IPIPEIF", sizeof(sd->name));
 737         sd->grp_id = 1 << 16;   /* group ID for iss subdevs */
 738         v4l2_set_subdevdata(sd, ipipeif);
 739         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 740
 741         pads[IPIPEIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
 742         pads[IPIPEIF_PAD_SOURCE_ISIF_SF].flags = MEDIA_PAD_FL_SOURCE;
 743         pads[IPIPEIF_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;
 744
 745         me->ops = &ipipeif_media_ops;
 746         ret = media_entity_init(me, IPIPEIF_PADS_NUM, pads, 0);
 747         if (ret < 0)
 748                 return ret;
 749
 750         ipipeif_init_formats(sd, NULL);
 751
 752         ipipeif->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 753         ipipeif->video_out.ops = &ipipeif_video_ops;
 754         ipipeif->video_out.iss = to_iss_device(ipipeif);
 755         ipipeif->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
 756         ipipeif->video_out.bpl_alignment = 32;
 757         ipipeif->video_out.bpl_zero_padding = 1;
 758         ipipeif->video_out.bpl_max = 0x1ffe0;
 759
 760         ret = omap4iss_video_init(&ipipeif->video_out, "ISP IPIPEIF");
 761         if (ret < 0)
 762                 return ret;
 763
 764         /* Connect the IPIPEIF subdev to the video node. */
 765         ret = media_entity_create_link(&ipipeif->subdev.entity,
 766                                        IPIPEIF_PAD_SOURCE_ISIF_SF,
 767                                        &ipipeif->video_out.video.entity, 0, 0);
 768         if (ret < 0)
 769                 return ret;
 770
 771         return 0;
 772 }
 773
 774 void omap4iss_ipipeif_unregister_entities(struct iss_ipipeif_device *ipipeif)
 775 {
 776         v4l2_device_unregister_subdev(&ipipeif->subdev);
 777         omap4iss_video_unregister(&ipipeif->video_out);
 778 }
 779
 780 int omap4iss_ipipeif_register_entities(struct iss_ipipeif_device *ipipeif,
 781                                        struct v4l2_device *vdev)
 782 {
 783         int ret;
 784
 785         /* Register the subdev and video node. */
 786         ret = v4l2_device_register_subdev(vdev, &ipipeif->subdev);
 787         if (ret < 0)
 788                 goto error;
 789
 790         ret = omap4iss_video_register(&ipipeif->video_out, vdev);
 791         if (ret < 0)
 792                 goto error;
 793
 794         return 0;
 795
 796 error:
 797         omap4iss_ipipeif_unregister_entities(ipipeif);
 798         return ret;
 799 }
 800
 801 /* -----------------------------------------------------------------------------
 802  * ISP IPIPEIF initialisation and cleanup
 803  */
 804
 805 /*
 806  * omap4iss_ipipeif_init - IPIPEIF module initialization.
 807  * @iss: Device pointer specific to the OMAP4 ISS.
 808  *
 809  * TODO: Get the initialisation values from platform data.
 810  *
 811  * Return 0 on success or a negative error code otherwise.
 812  */
 813 int omap4iss_ipipeif_init(struct iss_device *iss)
 814 {
 815         struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
 816
 817         ipipeif->state = ISS_PIPELINE_STREAM_STOPPED;
 818         init_waitqueue_head(&ipipeif->wait);
 819
 820         return ipipeif_init_entities(ipipeif);
 821 }
 822
 823 /*
 824  * omap4iss_ipipeif_cleanup - IPIPEIF module cleanup.
 825  * @iss: Device pointer specific to the OMAP4 ISS.
 826  */
 827 void omap4iss_ipipeif_cleanup(struct iss_device *iss)
 828 {
 829         struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
 830
 831         media_entity_cleanup(&ipipeif->subdev.entity);
 832 }