LXR linux/drivers/staging/media/omap4iss/iss

   1/*
   2 * TI OMAP4 ISS V4L2 Driver - ISP RESIZER 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_resizer.h"
  25
  26static const unsigned int resizer_fmts[] = {
  27        MEDIA_BUS_FMT_UYVY8_1X16,
  28        MEDIA_BUS_FMT_YUYV8_1X16,
  29};
  30
  31/*
  32 * resizer_print_status - Print current RESIZER Module register values.
  33 * @resizer: Pointer to ISS ISP RESIZER device.
  34 *
  35 * Also prints other debug information stored in the RESIZER module.
  36 */
  37#define RSZ_PRINT_REGISTER(iss, name)\
  38        dev_dbg(iss->dev, "###RSZ " #name "=0x%08x\n", \
  39                iss_reg_read(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_##name))
  40
  41#define RZA_PRINT_REGISTER(iss, name)\
  42        dev_dbg(iss->dev, "###RZA " #name "=0x%08x\n", \
  43                iss_reg_read(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_##name))
  44
  45static void resizer_print_status(struct iss_resizer_device *resizer)
  46{
  47        struct iss_device *iss = to_iss_device(resizer);
  48
  49        dev_dbg(iss->dev, "-------------RESIZER Register dump-------------\n");
  50
  51        RSZ_PRINT_REGISTER(iss, SYSCONFIG);
  52        RSZ_PRINT_REGISTER(iss, IN_FIFO_CTRL);
  53        RSZ_PRINT_REGISTER(iss, FRACDIV);
  54        RSZ_PRINT_REGISTER(iss, SRC_EN);
  55        RSZ_PRINT_REGISTER(iss, SRC_MODE);
  56        RSZ_PRINT_REGISTER(iss, SRC_FMT0);
  57        RSZ_PRINT_REGISTER(iss, SRC_FMT1);
  58        RSZ_PRINT_REGISTER(iss, SRC_VPS);
  59        RSZ_PRINT_REGISTER(iss, SRC_VSZ);
  60        RSZ_PRINT_REGISTER(iss, SRC_HPS);
  61        RSZ_PRINT_REGISTER(iss, SRC_HSZ);
  62        RSZ_PRINT_REGISTER(iss, DMA_RZA);
  63        RSZ_PRINT_REGISTER(iss, DMA_RZB);
  64        RSZ_PRINT_REGISTER(iss, DMA_STA);
  65        RSZ_PRINT_REGISTER(iss, GCK_MMR);
  66        RSZ_PRINT_REGISTER(iss, GCK_SDR);
  67        RSZ_PRINT_REGISTER(iss, IRQ_RZA);
  68        RSZ_PRINT_REGISTER(iss, IRQ_RZB);
  69        RSZ_PRINT_REGISTER(iss, YUV_Y_MIN);
  70        RSZ_PRINT_REGISTER(iss, YUV_Y_MAX);
  71        RSZ_PRINT_REGISTER(iss, YUV_C_MIN);
  72        RSZ_PRINT_REGISTER(iss, YUV_C_MAX);
  73        RSZ_PRINT_REGISTER(iss, SEQ);
  74
  75        RZA_PRINT_REGISTER(iss, EN);
  76        RZA_PRINT_REGISTER(iss, MODE);
  77        RZA_PRINT_REGISTER(iss, 420);
  78        RZA_PRINT_REGISTER(iss, I_VPS);
  79        RZA_PRINT_REGISTER(iss, I_HPS);
  80        RZA_PRINT_REGISTER(iss, O_VSZ);
  81        RZA_PRINT_REGISTER(iss, O_HSZ);
  82        RZA_PRINT_REGISTER(iss, V_PHS_Y);
  83        RZA_PRINT_REGISTER(iss, V_PHS_C);
  84        RZA_PRINT_REGISTER(iss, V_DIF);
  85        RZA_PRINT_REGISTER(iss, V_TYP);
  86        RZA_PRINT_REGISTER(iss, V_LPF);
  87        RZA_PRINT_REGISTER(iss, H_PHS);
  88        RZA_PRINT_REGISTER(iss, H_DIF);
  89        RZA_PRINT_REGISTER(iss, H_TYP);
  90        RZA_PRINT_REGISTER(iss, H_LPF);
  91        RZA_PRINT_REGISTER(iss, DWN_EN);
  92        RZA_PRINT_REGISTER(iss, SDR_Y_BAD_H);
  93        RZA_PRINT_REGISTER(iss, SDR_Y_BAD_L);
  94        RZA_PRINT_REGISTER(iss, SDR_Y_SAD_H);
  95        RZA_PRINT_REGISTER(iss, SDR_Y_SAD_L);
  96        RZA_PRINT_REGISTER(iss, SDR_Y_OFT);
  97        RZA_PRINT_REGISTER(iss, SDR_Y_PTR_S);
  98        RZA_PRINT_REGISTER(iss, SDR_Y_PTR_E);
  99        RZA_PRINT_REGISTER(iss, SDR_C_BAD_H);
 100        RZA_PRINT_REGISTER(iss, SDR_C_BAD_L);
 101        RZA_PRINT_REGISTER(iss, SDR_C_SAD_H);
 102        RZA_PRINT_REGISTER(iss, SDR_C_SAD_L);
 103        RZA_PRINT_REGISTER(iss, SDR_C_OFT);
 104        RZA_PRINT_REGISTER(iss, SDR_C_PTR_S);
 105        RZA_PRINT_REGISTER(iss, SDR_C_PTR_E);
 106
 107        dev_dbg(iss->dev, "-----------------------------------------------\n");
 108}
 109
 110/*
 111 * resizer_enable - Enable/Disable RESIZER.
 112 * @enable: enable flag
 113 *
 114 */
 115static void resizer_enable(struct iss_resizer_device *resizer, u8 enable)
 116{
 117        struct iss_device *iss = to_iss_device(resizer);
 118
 119        iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_EN,
 120                       RSZ_SRC_EN_SRC_EN, enable ? RSZ_SRC_EN_SRC_EN : 0);
 121
 122        /* TODO: Enable RSZB */
 123        iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_EN, RSZ_EN_EN,
 124                       enable ? RSZ_EN_EN : 0);
 125}
 126
 127/* -----------------------------------------------------------------------------
 128 * Format- and pipeline-related configuration helpers
 129 */
 130
 131/*
 132 * resizer_set_outaddr - Set memory address to save output image
 133 * @resizer: Pointer to ISP RESIZER device.
 134 * @addr: 32-bit memory address aligned on 32 byte boundary.
 135 *
 136 * Sets the memory address where the output will be saved.
 137 */
 138static void resizer_set_outaddr(struct iss_resizer_device *resizer, u32 addr)
 139{
 140        struct iss_device *iss = to_iss_device(resizer);
 141        struct v4l2_mbus_framefmt *informat, *outformat;
 142
 143        informat = &resizer->formats[RESIZER_PAD_SINK];
 144        outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM];
 145
 146        /* Save address split in Base Address H & L */
 147        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_BAD_H,
 148                      (addr >> 16) & 0xffff);
 149        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_BAD_L,
 150                      addr & 0xffff);
 151
 152        /* SAD = BAD */
 153        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_SAD_H,
 154                      (addr >> 16) & 0xffff);
 155        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_SAD_L,
 156                      addr & 0xffff);
 157
 158        /* Program UV buffer address... Hardcoded to be contiguous! */
 159        if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) &&
 160            (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) {
 161                u32 c_addr = addr + resizer->video_out.bpl_value
 162                           * outformat->height;
 163
 164                /* Ensure Y_BAD_L[6:0] = C_BAD_L[6:0]*/
 165                if ((c_addr ^ addr) & 0x7f) {
 166                        c_addr &= ~0x7f;
 167                        c_addr += 0x80;
 168                        c_addr |= addr & 0x7f;
 169                }
 170
 171                /* Save address split in Base Address H & L */
 172                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_BAD_H,
 173                              (c_addr >> 16) & 0xffff);
 174                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_BAD_L,
 175                              c_addr & 0xffff);
 176
 177                /* SAD = BAD */
 178                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_SAD_H,
 179                              (c_addr >> 16) & 0xffff);
 180                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_SAD_L,
 181                              c_addr & 0xffff);
 182        }
 183}
 184
 185static void resizer_configure(struct iss_resizer_device *resizer)
 186{
 187        struct iss_device *iss = to_iss_device(resizer);
 188        struct v4l2_mbus_framefmt *informat, *outformat;
 189
 190        informat = &resizer->formats[RESIZER_PAD_SINK];
 191        outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM];
 192
 193        /* Disable pass-through more. Despite its name, the BYPASS bit controls
 194         * pass-through mode, not bypass mode.
 195         */
 196        iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_FMT0,
 197                    RSZ_SRC_FMT0_BYPASS);
 198
 199        /* Select RSZ input */
 200        iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_FMT0,
 201                       RSZ_SRC_FMT0_SEL,
 202                       resizer->input == RESIZER_INPUT_IPIPEIF ?
 203                       RSZ_SRC_FMT0_SEL : 0);
 204
 205        /* RSZ ignores WEN signal from IPIPE/IPIPEIF */
 206        iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_MODE,
 207                    RSZ_SRC_MODE_WRT);
 208
 209        /* Set Resizer in free-running mode */
 210        iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_MODE,
 211                    RSZ_SRC_MODE_OST);
 212
 213        /* Init Resizer A */
 214        iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_MODE,
 215                    RZA_MODE_ONE_SHOT);
 216
 217        /* Set size related things now */
 218        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_VPS, 0);
 219        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_HPS, 0);
 220        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_VSZ,
 221                      informat->height - 2);
 222        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_HSZ,
 223                      informat->width - 1);
 224
 225        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_I_VPS, 0);
 226        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_I_HPS, 0);
 227
 228        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_O_VSZ,
 229                      outformat->height - 2);
 230        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_O_HSZ,
 231                      outformat->width - 1);
 232
 233        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_V_DIF, 0x100);
 234        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_H_DIF, 0x100);
 235
 236        /* Buffer output settings */
 237        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_PTR_S, 0);
 238        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_PTR_E,
 239                      outformat->height - 1);
 240
 241        iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_OFT,
 242                      resizer->video_out.bpl_value);
 243
 244        /* UYVY -> NV12 conversion */
 245        if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) &&
 246            (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) {
 247                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_420,
 248                              RSZ_420_CEN | RSZ_420_YEN);
 249
 250                /* UV Buffer output settings */
 251                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_PTR_S,
 252                              0);
 253                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_PTR_E,
 254                              outformat->height - 1);
 255
 256                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_OFT,
 257                              resizer->video_out.bpl_value);
 258        } else {
 259                iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_420, 0);
 260        }
 261}
 262
 263/* -----------------------------------------------------------------------------
 264 * Interrupt handling
 265 */
 266
 267static void resizer_isr_buffer(struct iss_resizer_device *resizer)
 268{
 269        struct iss_buffer *buffer;
 270
 271        /* The whole resizer needs to be stopped. Disabling RZA only produces
 272         * input FIFO overflows, most probably when the next frame is received.
 273         */
 274        resizer_enable(resizer, 0);
 275
 276        buffer = omap4iss_video_buffer_next(&resizer->video_out);
 277        if (!buffer)
 278                return;
 279
 280        resizer_set_outaddr(resizer, buffer->iss_addr);
 281
 282        resizer_enable(resizer, 1);
 283}
 284
 285/*
 286 * omap4iss_resizer_isr - Configure resizer during interframe time.
 287 * @resizer: Pointer to ISP RESIZER device.
 288 * @events: RESIZER events
 289 */
 290void omap4iss_resizer_isr(struct iss_resizer_device *resizer, u32 events)
 291{
 292        struct iss_device *iss = to_iss_device(resizer);
 293        struct iss_pipeline *pipe =
 294                             to_iss_pipeline(&resizer->subdev.entity);
 295
 296        if (events & (ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
 297                      ISP5_IRQ_RSZ_FIFO_OVF)) {
 298                dev_dbg(iss->dev, "RSZ Err: FIFO_IN_BLK:%d, FIFO_OVF:%d\n",
 299                        events & ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR ? 1 : 0,
 300                        events & ISP5_IRQ_RSZ_FIFO_OVF ? 1 : 0);
 301                omap4iss_pipeline_cancel_stream(pipe);
 302        }
 303
 304        if (omap4iss_module_sync_is_stopping(&resizer->wait,
 305                                             &resizer->stopping))
 306                return;
 307
 308        if (events & ISP5_IRQ_RSZ_INT_DMA)
 309                resizer_isr_buffer(resizer);
 310}
 311
 312/* -----------------------------------------------------------------------------
 313 * ISS video operations
 314 */
 315
 316static int resizer_video_queue(struct iss_video *video,
 317                               struct iss_buffer *buffer)
 318{
 319        struct iss_resizer_device *resizer = container_of(video,
 320                                struct iss_resizer_device, video_out);
 321
 322        if (!(resizer->output & RESIZER_OUTPUT_MEMORY))
 323                return -ENODEV;
 324
 325        resizer_set_outaddr(resizer, buffer->iss_addr);
 326
 327        /*
 328         * If streaming was enabled before there was a buffer queued
 329         * or underrun happened in the ISR, the hardware was not enabled
 330         * and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set.
 331         * Enable it now.
 332         */
 333        if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
 334                resizer_enable(resizer, 1);
 335                iss_video_dmaqueue_flags_clr(video);
 336        }
 337
 338        return 0;
 339}
 340
 341static const struct iss_video_operations resizer_video_ops = {
 342        .queue = resizer_video_queue,
 343};
 344
 345/* -----------------------------------------------------------------------------
 346 * V4L2 subdev operations
 347 */
 348
 349/*
 350 * resizer_set_stream - Enable/Disable streaming on the RESIZER module
 351 * @sd: ISP RESIZER V4L2 subdevice
 352 * @enable: Enable/disable stream
 353 */
 354static int resizer_set_stream(struct v4l2_subdev *sd, int enable)
 355{
 356        struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 357        struct iss_device *iss = to_iss_device(resizer);
 358        struct iss_video *video_out = &resizer->video_out;
 359        int ret = 0;
 360
 361        if (resizer->state == ISS_PIPELINE_STREAM_STOPPED) {
 362                if (enable == ISS_PIPELINE_STREAM_STOPPED)
 363                        return 0;
 364
 365                omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ);
 366
 367                iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_MMR,
 368                            RSZ_GCK_MMR_MMR);
 369                iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_SDR,
 370                            RSZ_GCK_SDR_CORE);
 371
 372                /* FIXME: Enable RSZB also */
 373                iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SYSCONFIG,
 374                            RSZ_SYSCONFIG_RSZA_CLK_EN);
 375        }
 376
 377        switch (enable) {
 378        case ISS_PIPELINE_STREAM_CONTINUOUS:
 379
 380                resizer_configure(resizer);
 381                resizer_print_status(resizer);
 382
 383                /*
 384                 * When outputting to memory with no buffer available, let the
 385                 * buffer queue handler start the hardware. A DMA queue flag
 386                 * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
 387                 * a buffer available.
 388                 */
 389                if (resizer->output & RESIZER_OUTPUT_MEMORY &&
 390                    !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
 391                        break;
 392
 393                atomic_set(&resizer->stopping, 0);
 394                resizer_enable(resizer, 1);
 395                iss_video_dmaqueue_flags_clr(video_out);
 396                break;
 397
 398        case ISS_PIPELINE_STREAM_STOPPED:
 399                if (resizer->state == ISS_PIPELINE_STREAM_STOPPED)
 400                        return 0;
 401                if (omap4iss_module_sync_idle(&sd->entity, &resizer->wait,
 402                                              &resizer->stopping))
 403                        ret = -ETIMEDOUT;
 404
 405                resizer_enable(resizer, 0);
 406                iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SYSCONFIG,
 407                            RSZ_SYSCONFIG_RSZA_CLK_EN);
 408                iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_SDR,
 409                            RSZ_GCK_SDR_CORE);
 410                iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_MMR,
 411                            RSZ_GCK_MMR_MMR);
 412                omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ);
 413                iss_video_dmaqueue_flags_clr(video_out);
 414                break;
 415        }
 416
 417        resizer->state = enable;
 418        return ret;
 419}
 420
 421static struct v4l2_mbus_framefmt *
 422__resizer_get_format(struct iss_resizer_device *resizer,
 423                     struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 424                     enum v4l2_subdev_format_whence which)
 425{
 426        if (which == V4L2_SUBDEV_FORMAT_TRY)
 427                return v4l2_subdev_get_try_format(&resizer->subdev, cfg, pad);
 428        return &resizer->formats[pad];
 429}
 430
 431/*
 432 * resizer_try_format - Try video format on a pad
 433 * @resizer: ISS RESIZER device
 434 * @cfg: V4L2 subdev pad config
 435 * @pad: Pad number
 436 * @fmt: Format
 437 */
 438static void
 439resizer_try_format(struct iss_resizer_device *resizer,
 440                   struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 441                   struct v4l2_mbus_framefmt *fmt,
 442                   enum v4l2_subdev_format_whence which)
 443{
 444        u32 pixelcode;
 445        struct v4l2_mbus_framefmt *format;
 446        unsigned int width = fmt->width;
 447        unsigned int height = fmt->height;
 448        unsigned int i;
 449
 450        switch (pad) {
 451        case RESIZER_PAD_SINK:
 452                for (i = 0; i < ARRAY_SIZE(resizer_fmts); i++) {
 453                        if (fmt->code == resizer_fmts[i])
 454                                break;
 455                }
 456
 457                /* If not found, use UYVY as default */
 458                if (i >= ARRAY_SIZE(resizer_fmts))
 459                        fmt->code = MEDIA_BUS_FMT_UYVY8_1X16;
 460
 461                /* Clamp the input size. */
 462                fmt->width = clamp_t(u32, width, 1, 8192);
 463                fmt->height = clamp_t(u32, height, 1, 8192);
 464                break;
 465
 466        case RESIZER_PAD_SOURCE_MEM:
 467                pixelcode = fmt->code;
 468                format = __resizer_get_format(resizer, cfg, RESIZER_PAD_SINK,
 469                                              which);
 470                memcpy(fmt, format, sizeof(*fmt));
 471
 472                if ((pixelcode == MEDIA_BUS_FMT_YUYV8_1_5X8) &&
 473                    (fmt->code == MEDIA_BUS_FMT_UYVY8_1X16))
 474                        fmt->code = pixelcode;
 475
 476                /* The data formatter truncates the number of horizontal output
 477                 * pixels to a multiple of 16. To avoid clipping data, allow
 478                 * callers to request an output size bigger than the input size
 479                 * up to the nearest multiple of 16.
 480                 */
 481                fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15);
 482                fmt->width &= ~15;
 483                fmt->height = clamp_t(u32, height, 32, fmt->height);
 484                break;
 485        }
 486
 487        fmt->colorspace = V4L2_COLORSPACE_JPEG;
 488        fmt->field = V4L2_FIELD_NONE;
 489}
 490
 491/*
 492 * resizer_enum_mbus_code - Handle pixel format enumeration
 493 * @sd     : pointer to v4l2 subdev structure
 494 * @cfg: V4L2 subdev pad config
 495 * @code   : pointer to v4l2_subdev_mbus_code_enum structure
 496 * return -EINVAL or zero on success
 497 */
 498static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
 499                                  struct v4l2_subdev_pad_config *cfg,
 500                                  struct v4l2_subdev_mbus_code_enum *code)
 501{
 502        struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 503        struct v4l2_mbus_framefmt *format;
 504
 505        switch (code->pad) {
 506        case RESIZER_PAD_SINK:
 507                if (code->index >= ARRAY_SIZE(resizer_fmts))
 508                        return -EINVAL;
 509
 510                code->code = resizer_fmts[code->index];
 511                break;
 512
 513        case RESIZER_PAD_SOURCE_MEM:
 514                format = __resizer_get_format(resizer, cfg, RESIZER_PAD_SINK,
 515                                              code->which);
 516
 517                if (code->index == 0) {
 518                        code->code = format->code;
 519                        break;
 520                }
 521
 522                switch (format->code) {
 523                case MEDIA_BUS_FMT_UYVY8_1X16:
 524                        if (code->index == 1)
 525                                code->code = MEDIA_BUS_FMT_YUYV8_1_5X8;
 526                        else
 527                                return -EINVAL;
 528                        break;
 529                default:
 530                        if (code->index != 0)
 531                                return -EINVAL;
 532                }
 533
 534                break;
 535
 536        default:
 537                return -EINVAL;
 538        }
 539
 540        return 0;
 541}
 542
 543static int resizer_enum_frame_size(struct v4l2_subdev *sd,
 544                                   struct v4l2_subdev_pad_config *cfg,
 545                                   struct v4l2_subdev_frame_size_enum *fse)
 546{
 547        struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 548        struct v4l2_mbus_framefmt format;
 549
 550        if (fse->index != 0)
 551                return -EINVAL;
 552
 553        format.code = fse->code;
 554        format.width = 1;
 555        format.height = 1;
 556        resizer_try_format(resizer, cfg, fse->pad, &format, fse->which);
 557        fse->min_width = format.width;
 558        fse->min_height = format.height;
 559
 560        if (format.code != fse->code)
 561                return -EINVAL;
 562
 563        format.code = fse->code;
 564        format.width = -1;
 565        format.height = -1;
 566        resizer_try_format(resizer, cfg, fse->pad, &format, fse->which);
 567        fse->max_width = format.width;
 568        fse->max_height = format.height;
 569
 570        return 0;
 571}
 572
 573/*
 574 * resizer_get_format - Retrieve the video format on a pad
 575 * @sd : ISP RESIZER V4L2 subdevice
 576 * @cfg: V4L2 subdev pad config
 577 * @fmt: Format
 578 *
 579 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 580 * to the format type.
 581 */
 582static int resizer_get_format(struct v4l2_subdev *sd,
 583                              struct v4l2_subdev_pad_config *cfg,
 584                              struct v4l2_subdev_format *fmt)
 585{
 586        struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 587        struct v4l2_mbus_framefmt *format;
 588
 589        format = __resizer_get_format(resizer, cfg, fmt->pad, fmt->which);
 590        if (!format)
 591                return -EINVAL;
 592
 593        fmt->format = *format;
 594        return 0;
 595}
 596
 597/*
 598 * resizer_set_format - Set the video format on a pad
 599 * @sd : ISP RESIZER V4L2 subdevice
 600 * @cfg: V4L2 subdev pad config
 601 * @fmt: Format
 602 *
 603 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 604 * to the format type.
 605 */
 606static int resizer_set_format(struct v4l2_subdev *sd,
 607                              struct v4l2_subdev_pad_config *cfg,
 608                              struct v4l2_subdev_format *fmt)
 609{
 610        struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 611        struct v4l2_mbus_framefmt *format;
 612
 613        format = __resizer_get_format(resizer, cfg, fmt->pad, fmt->which);
 614        if (!format)
 615                return -EINVAL;
 616
 617        resizer_try_format(resizer, cfg, fmt->pad, &fmt->format, fmt->which);
 618        *format = fmt->format;
 619
 620        /* Propagate the format from sink to source */
 621        if (fmt->pad == RESIZER_PAD_SINK) {
 622                format = __resizer_get_format(resizer, cfg,
 623                                              RESIZER_PAD_SOURCE_MEM,
 624                                              fmt->which);
 625                *format = fmt->format;
 626                resizer_try_format(resizer, cfg, RESIZER_PAD_SOURCE_MEM, format,
 627                                   fmt->which);
 628        }
 629
 630        return 0;
 631}
 632
 633static int resizer_link_validate(struct v4l2_subdev *sd,
 634                                 struct media_link *link,
 635                                 struct v4l2_subdev_format *source_fmt,
 636                                 struct v4l2_subdev_format *sink_fmt)
 637{
 638        /* Check if the two ends match */
 639        if (source_fmt->format.width != sink_fmt->format.width ||
 640            source_fmt->format.height != sink_fmt->format.height)
 641                return -EPIPE;
 642
 643        if (source_fmt->format.code != sink_fmt->format.code)
 644                return -EPIPE;
 645
 646        return 0;
 647}
 648
 649/*
 650 * resizer_init_formats - Initialize formats on all pads
 651 * @sd: ISP RESIZER V4L2 subdevice
 652 * @fh: V4L2 subdev file handle
 653 *
 654 * Initialize all pad formats with default values. If fh is not NULL, try
 655 * formats are initialized on the file handle. Otherwise active formats are
 656 * initialized on the device.
 657 */
 658static int resizer_init_formats(struct v4l2_subdev *sd,
 659                                struct v4l2_subdev_fh *fh)
 660{
 661        struct v4l2_subdev_format format;
 662
 663        memset(&format, 0, sizeof(format));
 664        format.pad = RESIZER_PAD_SINK;
 665        format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 666        format.format.code = MEDIA_BUS_FMT_UYVY8_1X16;
 667        format.format.width = 4096;
 668        format.format.height = 4096;
 669        resizer_set_format(sd, fh ? fh->pad : NULL, &format);
 670
 671        return 0;
 672}
 673
 674/* V4L2 subdev video operations */
 675static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = {
 676        .s_stream = resizer_set_stream,
 677};
 678
 679/* V4L2 subdev pad operations */
 680static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = {
 681        .enum_mbus_code = resizer_enum_mbus_code,
 682        .enum_frame_size = resizer_enum_frame_size,
 683        .get_fmt = resizer_get_format,
 684        .set_fmt = resizer_set_format,
 685        .link_validate = resizer_link_validate,
 686};
 687
 688/* V4L2 subdev operations */
 689static const struct v4l2_subdev_ops resizer_v4l2_ops = {
 690        .video = &resizer_v4l2_video_ops,
 691        .pad = &resizer_v4l2_pad_ops,
 692};
 693
 694/* V4L2 subdev internal operations */
 695static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = {
 696        .open = resizer_init_formats,
 697};
 698
 699/* -----------------------------------------------------------------------------
 700 * Media entity operations
 701 */
 702
 703/*
 704 * resizer_link_setup - Setup RESIZER connections
 705 * @entity: RESIZER media entity
 706 * @local: Pad at the local end of the link
 707 * @remote: Pad at the remote end of the link
 708 * @flags: Link flags
 709 *
 710 * return -EINVAL or zero on success
 711 */
 712static int resizer_link_setup(struct media_entity *entity,
 713                              const struct media_pad *local,
 714                              const struct media_pad *remote, u32 flags)
 715{
 716        struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 717        struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 718        struct iss_device *iss = to_iss_device(resizer);
 719        unsigned int index = local->index;
 720
 721        /* FIXME: this is actually a hack! */
 722        if (is_media_entity_v4l2_subdev(remote->entity))
 723                index |= 2 << 16;
 724
 725        switch (index) {
 726        case RESIZER_PAD_SINK | 2 << 16:
 727                /* Read from IPIPE or IPIPEIF. */
 728                if (!(flags & MEDIA_LNK_FL_ENABLED)) {
 729                        resizer->input = RESIZER_INPUT_NONE;
 730                        break;
 731                }
 732
 733                if (resizer->input != RESIZER_INPUT_NONE)
 734                        return -EBUSY;
 735
 736                if (remote->entity == &iss->ipipeif.subdev.entity)
 737                        resizer->input = RESIZER_INPUT_IPIPEIF;
 738                else if (remote->entity == &iss->ipipe.subdev.entity)
 739                        resizer->input = RESIZER_INPUT_IPIPE;
 740
 741                break;
 742
 743        case RESIZER_PAD_SOURCE_MEM:
 744                /* Write to memory */
 745                if (flags & MEDIA_LNK_FL_ENABLED) {
 746                        if (resizer->output & ~RESIZER_OUTPUT_MEMORY)
 747                                return -EBUSY;
 748                        resizer->output |= RESIZER_OUTPUT_MEMORY;
 749                } else {
 750                        resizer->output &= ~RESIZER_OUTPUT_MEMORY;
 751                }
 752                break;
 753
 754        default:
 755                return -EINVAL;
 756        }
 757
 758        return 0;
 759}
 760
 761/* media operations */
 762static const struct media_entity_operations resizer_media_ops = {
 763        .link_setup = resizer_link_setup,
 764        .link_validate = v4l2_subdev_link_validate,
 765};
 766
 767/*
 768 * resizer_init_entities - Initialize V4L2 subdev and media entity
 769 * @resizer: ISS ISP RESIZER module
 770 *
 771 * Return 0 on success and a negative error code on failure.
 772 */
 773static int resizer_init_entities(struct iss_resizer_device *resizer)
 774{
 775        struct v4l2_subdev *sd = &resizer->subdev;
 776        struct media_pad *pads = resizer->pads;
 777        struct media_entity *me = &sd->entity;
 778        int ret;
 779
 780        resizer->input = RESIZER_INPUT_NONE;
 781
 782        v4l2_subdev_init(sd, &resizer_v4l2_ops);
 783        sd->internal_ops = &resizer_v4l2_internal_ops;
 784        strlcpy(sd->name, "OMAP4 ISS ISP resizer", sizeof(sd->name));
 785        sd->grp_id = 1 << 16;   /* group ID for iss subdevs */
 786        v4l2_set_subdevdata(sd, resizer);
 787        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 788
 789        pads[RESIZER_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
 790        pads[RESIZER_PAD_SOURCE_MEM].flags = MEDIA_PAD_FL_SOURCE;
 791
 792        me->ops = &resizer_media_ops;
 793        ret = media_entity_pads_init(me, RESIZER_PADS_NUM, pads);
 794        if (ret < 0)
 795                return ret;
 796
 797        resizer_init_formats(sd, NULL);
 798
 799        resizer->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 800        resizer->video_out.ops = &resizer_video_ops;
 801        resizer->video_out.iss = to_iss_device(resizer);
 802        resizer->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
 803        resizer->video_out.bpl_alignment = 32;
 804        resizer->video_out.bpl_zero_padding = 1;
 805        resizer->video_out.bpl_max = 0x1ffe0;
 806
 807        return omap4iss_video_init(&resizer->video_out, "ISP resizer a");
 808}
 809
 810void omap4iss_resizer_unregister_entities(struct iss_resizer_device *resizer)
 811{
 812        v4l2_device_unregister_subdev(&resizer->subdev);
 813        omap4iss_video_unregister(&resizer->video_out);
 814}
 815
 816int omap4iss_resizer_register_entities(struct iss_resizer_device *resizer,
 817                                       struct v4l2_device *vdev)
 818{
 819        int ret;
 820
 821        /* Register the subdev and video node. */
 822        ret = v4l2_device_register_subdev(vdev, &resizer->subdev);
 823        if (ret < 0)
 824                goto error;
 825
 826        ret = omap4iss_video_register(&resizer->video_out, vdev);
 827        if (ret < 0)
 828                goto error;
 829
 830        return 0;
 831
 832error:
 833        omap4iss_resizer_unregister_entities(resizer);
 834        return ret;
 835}
 836
 837/* -----------------------------------------------------------------------------
 838 * ISP RESIZER initialisation and cleanup
 839 */
 840
 841/*
 842 * omap4iss_resizer_init - RESIZER module initialization.
 843 * @iss: Device pointer specific to the OMAP4 ISS.
 844 *
 845 * TODO: Get the initialisation values from platform data.
 846 *
 847 * Return 0 on success or a negative error code otherwise.
 848 */
 849int omap4iss_resizer_init(struct iss_device *iss)
 850{
 851        struct iss_resizer_device *resizer = &iss->resizer;
 852
 853        resizer->state = ISS_PIPELINE_STREAM_STOPPED;
 854        init_waitqueue_head(&resizer->wait);
 855
 856        return resizer_init_entities(resizer);
 857}
 858
 859/*
 860 * omap4iss_resizer_create_links() - RESIZER pads links creation
 861 * @iss: Pointer to ISS device
 862 *
 863 * return negative error code or zero on success
 864 */
 865int omap4iss_resizer_create_links(struct iss_device *iss)
 866{
 867        struct iss_resizer_device *resizer = &iss->resizer;
 868
 869        /* Connect the RESIZER subdev to the video node. */
 870        return media_create_pad_link(&resizer->subdev.entity,
 871                                     RESIZER_PAD_SOURCE_MEM,
 872                                     &resizer->video_out.video.entity, 0, 0);
 873}
 874
 875/*
 876 * omap4iss_resizer_cleanup - RESIZER module cleanup.
 877 * @iss: Device pointer specific to the OMAP4 ISS.
 878 */
 879void omap4iss_resizer_cleanup(struct iss_device *iss)
 880{
 881        struct iss_resizer_device *resizer = &iss->resizer;
 882
 883        media_entity_cleanup(&resizer->subdev.entity);
 884}
 885