drivers/staging/media/omap4iss/iss

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This source file includes following definitions.
resizer_print_status
resizer_enable
resizer_set_outaddr
resizer_configure
resizer_isr_buffer
omap4iss_resizer_isr
resizer_video_queue
resizer_set_stream
__resizer_get_format
resizer_try_format
resizer_enum_mbus_code
resizer_enum_frame_size
resizer_get_format
resizer_set_format
resizer_link_validate
resizer_init_formats
resizer_link_setup
resizer_init_entities
omap4iss_resizer_unregister_entities
omap4iss_resizer_register_entities
omap4iss_resizer_init
omap4iss_resizer_create_links
omap4iss_resizer_cleanup
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * TI OMAP4 ISS V4L2 Driver - ISP RESIZER module
   4  *
   5  * Copyright (C) 2012 Texas Instruments, Inc.
   6  *
   7  * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
   8  */
   9 
  10 #include <linux/module.h>
  11 #include <linux/uaccess.h>
  12 #include <linux/delay.h>
  13 #include <linux/device.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/mm.h>
  16 #include <linux/sched.h>
  17 
  18 #include "iss.h"
  19 #include "iss_regs.h"
  20 #include "iss_resizer.h"
  21 
  22 static const unsigned int resizer_fmts[] = {
  23         MEDIA_BUS_FMT_UYVY8_1X16,
  24         MEDIA_BUS_FMT_YUYV8_1X16,
  25 };
  26 
  27 /*
  28  * resizer_print_status - Print current RESIZER Module register values.
  29  * @resizer: Pointer to ISS ISP RESIZER device.
  30  *
  31  * Also prints other debug information stored in the RESIZER module.
  32  */
  33 #define RSZ_PRINT_REGISTER(iss, name)\
  34         dev_dbg(iss->dev, "###RSZ " #name "=0x%08x\n", \
  35                 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_##name))
  36 
  37 #define RZA_PRINT_REGISTER(iss, name)\
  38         dev_dbg(iss->dev, "###RZA " #name "=0x%08x\n", \
  39                 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_##name))
  40 
  41 static void resizer_print_status(struct iss_resizer_device *resizer)
  42 {
  43         struct iss_device *iss = to_iss_device(resizer);
  44 
  45         dev_dbg(iss->dev, "-------------RESIZER Register dump-------------\n");
  46 
  47         RSZ_PRINT_REGISTER(iss, SYSCONFIG);
  48         RSZ_PRINT_REGISTER(iss, IN_FIFO_CTRL);
  49         RSZ_PRINT_REGISTER(iss, FRACDIV);
  50         RSZ_PRINT_REGISTER(iss, SRC_EN);
  51         RSZ_PRINT_REGISTER(iss, SRC_MODE);
  52         RSZ_PRINT_REGISTER(iss, SRC_FMT0);
  53         RSZ_PRINT_REGISTER(iss, SRC_FMT1);
  54         RSZ_PRINT_REGISTER(iss, SRC_VPS);
  55         RSZ_PRINT_REGISTER(iss, SRC_VSZ);
  56         RSZ_PRINT_REGISTER(iss, SRC_HPS);
  57         RSZ_PRINT_REGISTER(iss, SRC_HSZ);
  58         RSZ_PRINT_REGISTER(iss, DMA_RZA);
  59         RSZ_PRINT_REGISTER(iss, DMA_RZB);
  60         RSZ_PRINT_REGISTER(iss, DMA_STA);
  61         RSZ_PRINT_REGISTER(iss, GCK_MMR);
  62         RSZ_PRINT_REGISTER(iss, GCK_SDR);
  63         RSZ_PRINT_REGISTER(iss, IRQ_RZA);
  64         RSZ_PRINT_REGISTER(iss, IRQ_RZB);
  65         RSZ_PRINT_REGISTER(iss, YUV_Y_MIN);
  66         RSZ_PRINT_REGISTER(iss, YUV_Y_MAX);
  67         RSZ_PRINT_REGISTER(iss, YUV_C_MIN);
  68         RSZ_PRINT_REGISTER(iss, YUV_C_MAX);
  69         RSZ_PRINT_REGISTER(iss, SEQ);
  70 
  71         RZA_PRINT_REGISTER(iss, EN);
  72         RZA_PRINT_REGISTER(iss, MODE);
  73         RZA_PRINT_REGISTER(iss, 420);
  74         RZA_PRINT_REGISTER(iss, I_VPS);
  75         RZA_PRINT_REGISTER(iss, I_HPS);
  76         RZA_PRINT_REGISTER(iss, O_VSZ);
  77         RZA_PRINT_REGISTER(iss, O_HSZ);
  78         RZA_PRINT_REGISTER(iss, V_PHS_Y);
  79         RZA_PRINT_REGISTER(iss, V_PHS_C);
  80         RZA_PRINT_REGISTER(iss, V_DIF);
  81         RZA_PRINT_REGISTER(iss, V_TYP);
  82         RZA_PRINT_REGISTER(iss, V_LPF);
  83         RZA_PRINT_REGISTER(iss, H_PHS);
  84         RZA_PRINT_REGISTER(iss, H_DIF);
  85         RZA_PRINT_REGISTER(iss, H_TYP);
  86         RZA_PRINT_REGISTER(iss, H_LPF);
  87         RZA_PRINT_REGISTER(iss, DWN_EN);
  88         RZA_PRINT_REGISTER(iss, SDR_Y_BAD_H);
  89         RZA_PRINT_REGISTER(iss, SDR_Y_BAD_L);
  90         RZA_PRINT_REGISTER(iss, SDR_Y_SAD_H);
  91         RZA_PRINT_REGISTER(iss, SDR_Y_SAD_L);
  92         RZA_PRINT_REGISTER(iss, SDR_Y_OFT);
  93         RZA_PRINT_REGISTER(iss, SDR_Y_PTR_S);
  94         RZA_PRINT_REGISTER(iss, SDR_Y_PTR_E);
  95         RZA_PRINT_REGISTER(iss, SDR_C_BAD_H);
  96         RZA_PRINT_REGISTER(iss, SDR_C_BAD_L);
  97         RZA_PRINT_REGISTER(iss, SDR_C_SAD_H);
  98         RZA_PRINT_REGISTER(iss, SDR_C_SAD_L);
  99         RZA_PRINT_REGISTER(iss, SDR_C_OFT);
 100         RZA_PRINT_REGISTER(iss, SDR_C_PTR_S);
 101         RZA_PRINT_REGISTER(iss, SDR_C_PTR_E);
 102 
 103         dev_dbg(iss->dev, "-----------------------------------------------\n");
 104 }
 105 
 106 /*
 107  * resizer_enable - Enable/Disable RESIZER.
 108  * @enable: enable flag
 109  *
 110  */
 111 static void resizer_enable(struct iss_resizer_device *resizer, u8 enable)
 112 {
 113         struct iss_device *iss = to_iss_device(resizer);
 114 
 115         iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_EN,
 116                        RSZ_SRC_EN_SRC_EN, enable ? RSZ_SRC_EN_SRC_EN : 0);
 117 
 118         /* TODO: Enable RSZB */
 119         iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_EN, RSZ_EN_EN,
 120                        enable ? RSZ_EN_EN : 0);
 121 }
 122 
 123 /* -----------------------------------------------------------------------------
 124  * Format- and pipeline-related configuration helpers
 125  */
 126 
 127 /*
 128  * resizer_set_outaddr - Set memory address to save output image
 129  * @resizer: Pointer to ISP RESIZER device.
 130  * @addr: 32-bit memory address aligned on 32 byte boundary.
 131  *
 132  * Sets the memory address where the output will be saved.
 133  */
 134 static void resizer_set_outaddr(struct iss_resizer_device *resizer, u32 addr)
 135 {
 136         struct iss_device *iss = to_iss_device(resizer);
 137         struct v4l2_mbus_framefmt *informat, *outformat;
 138 
 139         informat = &resizer->formats[RESIZER_PAD_SINK];
 140         outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM];
 141 
 142         /* Save address split in Base Address H & L */
 143         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_BAD_H,
 144                       (addr >> 16) & 0xffff);
 145         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_BAD_L,
 146                       addr & 0xffff);
 147 
 148         /* SAD = BAD */
 149         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_SAD_H,
 150                       (addr >> 16) & 0xffff);
 151         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_SAD_L,
 152                       addr & 0xffff);
 153 
 154         /* Program UV buffer address... Hardcoded to be contiguous! */
 155         if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) &&
 156             (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) {
 157                 u32 c_addr = addr + resizer->video_out.bpl_value
 158                            * outformat->height;
 159 
 160                 /* Ensure Y_BAD_L[6:0] = C_BAD_L[6:0]*/
 161                 if ((c_addr ^ addr) & 0x7f) {
 162                         c_addr &= ~0x7f;
 163                         c_addr += 0x80;
 164                         c_addr |= addr & 0x7f;
 165                 }
 166 
 167                 /* Save address split in Base Address H & L */
 168                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_BAD_H,
 169                               (c_addr >> 16) & 0xffff);
 170                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_BAD_L,
 171                               c_addr & 0xffff);
 172 
 173                 /* SAD = BAD */
 174                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_SAD_H,
 175                               (c_addr >> 16) & 0xffff);
 176                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_SAD_L,
 177                               c_addr & 0xffff);
 178         }
 179 }
 180 
 181 static void resizer_configure(struct iss_resizer_device *resizer)
 182 {
 183         struct iss_device *iss = to_iss_device(resizer);
 184         struct v4l2_mbus_framefmt *informat, *outformat;
 185 
 186         informat = &resizer->formats[RESIZER_PAD_SINK];
 187         outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM];
 188 
 189         /* Disable pass-through more. Despite its name, the BYPASS bit controls
 190          * pass-through mode, not bypass mode.
 191          */
 192         iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_FMT0,
 193                     RSZ_SRC_FMT0_BYPASS);
 194 
 195         /* Select RSZ input */
 196         iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_FMT0,
 197                        RSZ_SRC_FMT0_SEL,
 198                        resizer->input == RESIZER_INPUT_IPIPEIF ?
 199                        RSZ_SRC_FMT0_SEL : 0);
 200 
 201         /* RSZ ignores WEN signal from IPIPE/IPIPEIF */
 202         iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_MODE,
 203                     RSZ_SRC_MODE_WRT);
 204 
 205         /* Set Resizer in free-running mode */
 206         iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_MODE,
 207                     RSZ_SRC_MODE_OST);
 208 
 209         /* Init Resizer A */
 210         iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_MODE,
 211                     RZA_MODE_ONE_SHOT);
 212 
 213         /* Set size related things now */
 214         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_VPS, 0);
 215         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_HPS, 0);
 216         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_VSZ,
 217                       informat->height - 2);
 218         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_HSZ,
 219                       informat->width - 1);
 220 
 221         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_I_VPS, 0);
 222         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_I_HPS, 0);
 223 
 224         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_O_VSZ,
 225                       outformat->height - 2);
 226         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_O_HSZ,
 227                       outformat->width - 1);
 228 
 229         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_V_DIF, 0x100);
 230         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_H_DIF, 0x100);
 231 
 232         /* Buffer output settings */
 233         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_PTR_S, 0);
 234         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_PTR_E,
 235                       outformat->height - 1);
 236 
 237         iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_OFT,
 238                       resizer->video_out.bpl_value);
 239 
 240         /* UYVY -> NV12 conversion */
 241         if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) &&
 242             (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) {
 243                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_420,
 244                               RSZ_420_CEN | RSZ_420_YEN);
 245 
 246                 /* UV Buffer output settings */
 247                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_PTR_S,
 248                               0);
 249                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_PTR_E,
 250                               outformat->height - 1);
 251 
 252                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_OFT,
 253                               resizer->video_out.bpl_value);
 254         } else {
 255                 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_420, 0);
 256         }
 257 }
 258 
 259 /* -----------------------------------------------------------------------------
 260  * Interrupt handling
 261  */
 262 
 263 static void resizer_isr_buffer(struct iss_resizer_device *resizer)
 264 {
 265         struct iss_buffer *buffer;
 266 
 267         /* The whole resizer needs to be stopped. Disabling RZA only produces
 268          * input FIFO overflows, most probably when the next frame is received.
 269          */
 270         resizer_enable(resizer, 0);
 271 
 272         buffer = omap4iss_video_buffer_next(&resizer->video_out);
 273         if (!buffer)
 274                 return;
 275 
 276         resizer_set_outaddr(resizer, buffer->iss_addr);
 277 
 278         resizer_enable(resizer, 1);
 279 }
 280 
 281 /*
 282  * omap4iss_resizer_isr - Configure resizer during interframe time.
 283  * @resizer: Pointer to ISP RESIZER device.
 284  * @events: RESIZER events
 285  */
 286 void omap4iss_resizer_isr(struct iss_resizer_device *resizer, u32 events)
 287 {
 288         struct iss_device *iss = to_iss_device(resizer);
 289         struct iss_pipeline *pipe =
 290                              to_iss_pipeline(&resizer->subdev.entity);
 291 
 292         if (events & (ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
 293                       ISP5_IRQ_RSZ_FIFO_OVF)) {
 294                 dev_dbg(iss->dev, "RSZ Err: FIFO_IN_BLK:%d, FIFO_OVF:%d\n",
 295                         events & ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR ? 1 : 0,
 296                         events & ISP5_IRQ_RSZ_FIFO_OVF ? 1 : 0);
 297                 omap4iss_pipeline_cancel_stream(pipe);
 298         }
 299 
 300         if (omap4iss_module_sync_is_stopping(&resizer->wait,
 301                                              &resizer->stopping))
 302                 return;
 303 
 304         if (events & ISP5_IRQ_RSZ_INT_DMA)
 305                 resizer_isr_buffer(resizer);
 306 }
 307 
 308 /* -----------------------------------------------------------------------------
 309  * ISS video operations
 310  */
 311 
 312 static int resizer_video_queue(struct iss_video *video,
 313                                struct iss_buffer *buffer)
 314 {
 315         struct iss_resizer_device *resizer = container_of(video,
 316                                 struct iss_resizer_device, video_out);
 317 
 318         if (!(resizer->output & RESIZER_OUTPUT_MEMORY))
 319                 return -ENODEV;
 320 
 321         resizer_set_outaddr(resizer, buffer->iss_addr);
 322 
 323         /*
 324          * If streaming was enabled before there was a buffer queued
 325          * or underrun happened in the ISR, the hardware was not enabled
 326          * and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set.
 327          * Enable it now.
 328          */
 329         if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
 330                 resizer_enable(resizer, 1);
 331                 iss_video_dmaqueue_flags_clr(video);
 332         }
 333 
 334         return 0;
 335 }
 336 
 337 static const struct iss_video_operations resizer_video_ops = {
 338         .queue = resizer_video_queue,
 339 };
 340 
 341 /* -----------------------------------------------------------------------------
 342  * V4L2 subdev operations
 343  */
 344 
 345 /*
 346  * resizer_set_stream - Enable/Disable streaming on the RESIZER module
 347  * @sd: ISP RESIZER V4L2 subdevice
 348  * @enable: Enable/disable stream
 349  */
 350 static int resizer_set_stream(struct v4l2_subdev *sd, int enable)
 351 {
 352         struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 353         struct iss_device *iss = to_iss_device(resizer);
 354         struct iss_video *video_out = &resizer->video_out;
 355         int ret = 0;
 356 
 357         if (resizer->state == ISS_PIPELINE_STREAM_STOPPED) {
 358                 if (enable == ISS_PIPELINE_STREAM_STOPPED)
 359                         return 0;
 360 
 361                 omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ);
 362 
 363                 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_MMR,
 364                             RSZ_GCK_MMR_MMR);
 365                 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_SDR,
 366                             RSZ_GCK_SDR_CORE);
 367 
 368                 /* FIXME: Enable RSZB also */
 369                 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SYSCONFIG,
 370                             RSZ_SYSCONFIG_RSZA_CLK_EN);
 371         }
 372 
 373         switch (enable) {
 374         case ISS_PIPELINE_STREAM_CONTINUOUS:
 375 
 376                 resizer_configure(resizer);
 377                 resizer_print_status(resizer);
 378 
 379                 /*
 380                  * When outputting to memory with no buffer available, let the
 381                  * buffer queue handler start the hardware. A DMA queue flag
 382                  * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
 383                  * a buffer available.
 384                  */
 385                 if (resizer->output & RESIZER_OUTPUT_MEMORY &&
 386                     !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
 387                         break;
 388 
 389                 atomic_set(&resizer->stopping, 0);
 390                 resizer_enable(resizer, 1);
 391                 iss_video_dmaqueue_flags_clr(video_out);
 392                 break;
 393 
 394         case ISS_PIPELINE_STREAM_STOPPED:
 395                 if (resizer->state == ISS_PIPELINE_STREAM_STOPPED)
 396                         return 0;
 397                 if (omap4iss_module_sync_idle(&sd->entity, &resizer->wait,
 398                                               &resizer->stopping))
 399                         ret = -ETIMEDOUT;
 400 
 401                 resizer_enable(resizer, 0);
 402                 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SYSCONFIG,
 403                             RSZ_SYSCONFIG_RSZA_CLK_EN);
 404                 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_SDR,
 405                             RSZ_GCK_SDR_CORE);
 406                 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_MMR,
 407                             RSZ_GCK_MMR_MMR);
 408                 omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ);
 409                 iss_video_dmaqueue_flags_clr(video_out);
 410                 break;
 411         }
 412 
 413         resizer->state = enable;
 414         return ret;
 415 }
 416 
 417 static struct v4l2_mbus_framefmt *
 418 __resizer_get_format(struct iss_resizer_device *resizer,
 419                      struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 420                      enum v4l2_subdev_format_whence which)
 421 {
 422         if (which == V4L2_SUBDEV_FORMAT_TRY)
 423                 return v4l2_subdev_get_try_format(&resizer->subdev, cfg, pad);
 424         return &resizer->formats[pad];
 425 }
 426 
 427 /*
 428  * resizer_try_format - Try video format on a pad
 429  * @resizer: ISS RESIZER device
 430  * @cfg: V4L2 subdev pad config
 431  * @pad: Pad number
 432  * @fmt: Format
 433  */
 434 static void
 435 resizer_try_format(struct iss_resizer_device *resizer,
 436                    struct v4l2_subdev_pad_config *cfg, unsigned int pad,
 437                    struct v4l2_mbus_framefmt *fmt,
 438                    enum v4l2_subdev_format_whence which)
 439 {
 440         u32 pixelcode;
 441         struct v4l2_mbus_framefmt *format;
 442         unsigned int width = fmt->width;
 443         unsigned int height = fmt->height;
 444         unsigned int i;
 445 
 446         switch (pad) {
 447         case RESIZER_PAD_SINK:
 448                 for (i = 0; i < ARRAY_SIZE(resizer_fmts); i++) {
 449                         if (fmt->code == resizer_fmts[i])
 450                                 break;
 451                 }
 452 
 453                 /* If not found, use UYVY as default */
 454                 if (i >= ARRAY_SIZE(resizer_fmts))
 455                         fmt->code = MEDIA_BUS_FMT_UYVY8_1X16;
 456 
 457                 /* Clamp the input size. */
 458                 fmt->width = clamp_t(u32, width, 1, 8192);
 459                 fmt->height = clamp_t(u32, height, 1, 8192);
 460                 break;
 461 
 462         case RESIZER_PAD_SOURCE_MEM:
 463                 pixelcode = fmt->code;
 464                 format = __resizer_get_format(resizer, cfg, RESIZER_PAD_SINK,
 465                                               which);
 466                 memcpy(fmt, format, sizeof(*fmt));
 467 
 468                 if ((pixelcode == MEDIA_BUS_FMT_YUYV8_1_5X8) &&
 469                     (fmt->code == MEDIA_BUS_FMT_UYVY8_1X16))
 470                         fmt->code = pixelcode;
 471 
 472                 /* The data formatter truncates the number of horizontal output
 473                  * pixels to a multiple of 16. To avoid clipping data, allow
 474                  * callers to request an output size bigger than the input size
 475                  * up to the nearest multiple of 16.
 476                  */
 477                 fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15);
 478                 fmt->width &= ~15;
 479                 fmt->height = clamp_t(u32, height, 32, fmt->height);
 480                 break;
 481         }
 482 
 483         fmt->colorspace = V4L2_COLORSPACE_JPEG;
 484         fmt->field = V4L2_FIELD_NONE;
 485 }
 486 
 487 /*
 488  * resizer_enum_mbus_code - Handle pixel format enumeration
 489  * @sd     : pointer to v4l2 subdev structure
 490  * @cfg: V4L2 subdev pad config
 491  * @code   : pointer to v4l2_subdev_mbus_code_enum structure
 492  * return -EINVAL or zero on success
 493  */
 494 static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
 495                                   struct v4l2_subdev_pad_config *cfg,
 496                                   struct v4l2_subdev_mbus_code_enum *code)
 497 {
 498         struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 499         struct v4l2_mbus_framefmt *format;
 500 
 501         switch (code->pad) {
 502         case RESIZER_PAD_SINK:
 503                 if (code->index >= ARRAY_SIZE(resizer_fmts))
 504                         return -EINVAL;
 505 
 506                 code->code = resizer_fmts[code->index];
 507                 break;
 508 
 509         case RESIZER_PAD_SOURCE_MEM:
 510                 format = __resizer_get_format(resizer, cfg, RESIZER_PAD_SINK,
 511                                               code->which);
 512 
 513                 if (code->index == 0) {
 514                         code->code = format->code;
 515                         break;
 516                 }
 517 
 518                 switch (format->code) {
 519                 case MEDIA_BUS_FMT_UYVY8_1X16:
 520                         if (code->index == 1)
 521                                 code->code = MEDIA_BUS_FMT_YUYV8_1_5X8;
 522                         else
 523                                 return -EINVAL;
 524                         break;
 525                 default:
 526                         if (code->index != 0)
 527                                 return -EINVAL;
 528                 }
 529 
 530                 break;
 531 
 532         default:
 533                 return -EINVAL;
 534         }
 535 
 536         return 0;
 537 }
 538 
 539 static int resizer_enum_frame_size(struct v4l2_subdev *sd,
 540                                    struct v4l2_subdev_pad_config *cfg,
 541                                    struct v4l2_subdev_frame_size_enum *fse)
 542 {
 543         struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 544         struct v4l2_mbus_framefmt format;
 545 
 546         if (fse->index != 0)
 547                 return -EINVAL;
 548 
 549         format.code = fse->code;
 550         format.width = 1;
 551         format.height = 1;
 552         resizer_try_format(resizer, cfg, fse->pad, &format, fse->which);
 553         fse->min_width = format.width;
 554         fse->min_height = format.height;
 555 
 556         if (format.code != fse->code)
 557                 return -EINVAL;
 558 
 559         format.code = fse->code;
 560         format.width = -1;
 561         format.height = -1;
 562         resizer_try_format(resizer, cfg, fse->pad, &format, fse->which);
 563         fse->max_width = format.width;
 564         fse->max_height = format.height;
 565 
 566         return 0;
 567 }
 568 
 569 /*
 570  * resizer_get_format - Retrieve the video format on a pad
 571  * @sd : ISP RESIZER V4L2 subdevice
 572  * @cfg: V4L2 subdev pad config
 573  * @fmt: Format
 574  *
 575  * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 576  * to the format type.
 577  */
 578 static int resizer_get_format(struct v4l2_subdev *sd,
 579                               struct v4l2_subdev_pad_config *cfg,
 580                               struct v4l2_subdev_format *fmt)
 581 {
 582         struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 583         struct v4l2_mbus_framefmt *format;
 584 
 585         format = __resizer_get_format(resizer, cfg, fmt->pad, fmt->which);
 586         if (!format)
 587                 return -EINVAL;
 588 
 589         fmt->format = *format;
 590         return 0;
 591 }
 592 
 593 /*
 594  * resizer_set_format - Set the video format on a pad
 595  * @sd : ISP RESIZER V4L2 subdevice
 596  * @cfg: V4L2 subdev pad config
 597  * @fmt: Format
 598  *
 599  * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 600  * to the format type.
 601  */
 602 static int resizer_set_format(struct v4l2_subdev *sd,
 603                               struct v4l2_subdev_pad_config *cfg,
 604                               struct v4l2_subdev_format *fmt)
 605 {
 606         struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 607         struct v4l2_mbus_framefmt *format;
 608 
 609         format = __resizer_get_format(resizer, cfg, fmt->pad, fmt->which);
 610         if (!format)
 611                 return -EINVAL;
 612 
 613         resizer_try_format(resizer, cfg, fmt->pad, &fmt->format, fmt->which);
 614         *format = fmt->format;
 615 
 616         /* Propagate the format from sink to source */
 617         if (fmt->pad == RESIZER_PAD_SINK) {
 618                 format = __resizer_get_format(resizer, cfg,
 619                                               RESIZER_PAD_SOURCE_MEM,
 620                                               fmt->which);
 621                 *format = fmt->format;
 622                 resizer_try_format(resizer, cfg, RESIZER_PAD_SOURCE_MEM, format,
 623                                    fmt->which);
 624         }
 625 
 626         return 0;
 627 }
 628 
 629 static int resizer_link_validate(struct v4l2_subdev *sd,
 630                                  struct media_link *link,
 631                                  struct v4l2_subdev_format *source_fmt,
 632                                  struct v4l2_subdev_format *sink_fmt)
 633 {
 634         /* Check if the two ends match */
 635         if (source_fmt->format.width != sink_fmt->format.width ||
 636             source_fmt->format.height != sink_fmt->format.height)
 637                 return -EPIPE;
 638 
 639         if (source_fmt->format.code != sink_fmt->format.code)
 640                 return -EPIPE;
 641 
 642         return 0;
 643 }
 644 
 645 /*
 646  * resizer_init_formats - Initialize formats on all pads
 647  * @sd: ISP RESIZER V4L2 subdevice
 648  * @fh: V4L2 subdev file handle
 649  *
 650  * Initialize all pad formats with default values. If fh is not NULL, try
 651  * formats are initialized on the file handle. Otherwise active formats are
 652  * initialized on the device.
 653  */
 654 static int resizer_init_formats(struct v4l2_subdev *sd,
 655                                 struct v4l2_subdev_fh *fh)
 656 {
 657         struct v4l2_subdev_format format;
 658 
 659         memset(&format, 0, sizeof(format));
 660         format.pad = RESIZER_PAD_SINK;
 661         format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 662         format.format.code = MEDIA_BUS_FMT_UYVY8_1X16;
 663         format.format.width = 4096;
 664         format.format.height = 4096;
 665         resizer_set_format(sd, fh ? fh->pad : NULL, &format);
 666 
 667         return 0;
 668 }
 669 
 670 /* V4L2 subdev video operations */
 671 static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = {
 672         .s_stream = resizer_set_stream,
 673 };
 674 
 675 /* V4L2 subdev pad operations */
 676 static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = {
 677         .enum_mbus_code = resizer_enum_mbus_code,
 678         .enum_frame_size = resizer_enum_frame_size,
 679         .get_fmt = resizer_get_format,
 680         .set_fmt = resizer_set_format,
 681         .link_validate = resizer_link_validate,
 682 };
 683 
 684 /* V4L2 subdev operations */
 685 static const struct v4l2_subdev_ops resizer_v4l2_ops = {
 686         .video = &resizer_v4l2_video_ops,
 687         .pad = &resizer_v4l2_pad_ops,
 688 };
 689 
 690 /* V4L2 subdev internal operations */
 691 static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = {
 692         .open = resizer_init_formats,
 693 };
 694 
 695 /* -----------------------------------------------------------------------------
 696  * Media entity operations
 697  */
 698 
 699 /*
 700  * resizer_link_setup - Setup RESIZER connections
 701  * @entity: RESIZER media entity
 702  * @local: Pad at the local end of the link
 703  * @remote: Pad at the remote end of the link
 704  * @flags: Link flags
 705  *
 706  * return -EINVAL or zero on success
 707  */
 708 static int resizer_link_setup(struct media_entity *entity,
 709                               const struct media_pad *local,
 710                               const struct media_pad *remote, u32 flags)
 711 {
 712         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 713         struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd);
 714         struct iss_device *iss = to_iss_device(resizer);
 715         unsigned int index = local->index;
 716 
 717         /* FIXME: this is actually a hack! */
 718         if (is_media_entity_v4l2_subdev(remote->entity))
 719                 index |= 2 << 16;
 720 
 721         switch (index) {
 722         case RESIZER_PAD_SINK | 2 << 16:
 723                 /* Read from IPIPE or IPIPEIF. */
 724                 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
 725                         resizer->input = RESIZER_INPUT_NONE;
 726                         break;
 727                 }
 728 
 729                 if (resizer->input != RESIZER_INPUT_NONE)
 730                         return -EBUSY;
 731 
 732                 if (remote->entity == &iss->ipipeif.subdev.entity)
 733                         resizer->input = RESIZER_INPUT_IPIPEIF;
 734                 else if (remote->entity == &iss->ipipe.subdev.entity)
 735                         resizer->input = RESIZER_INPUT_IPIPE;
 736 
 737                 break;
 738 
 739         case RESIZER_PAD_SOURCE_MEM:
 740                 /* Write to memory */
 741                 if (flags & MEDIA_LNK_FL_ENABLED) {
 742                         if (resizer->output & ~RESIZER_OUTPUT_MEMORY)
 743                                 return -EBUSY;
 744                         resizer->output |= RESIZER_OUTPUT_MEMORY;
 745                 } else {
 746                         resizer->output &= ~RESIZER_OUTPUT_MEMORY;
 747                 }
 748                 break;
 749 
 750         default:
 751                 return -EINVAL;
 752         }
 753 
 754         return 0;
 755 }
 756 
 757 /* media operations */
 758 static const struct media_entity_operations resizer_media_ops = {
 759         .link_setup = resizer_link_setup,
 760         .link_validate = v4l2_subdev_link_validate,
 761 };
 762 
 763 /*
 764  * resizer_init_entities - Initialize V4L2 subdev and media entity
 765  * @resizer: ISS ISP RESIZER module
 766  *
 767  * Return 0 on success and a negative error code on failure.
 768  */
 769 static int resizer_init_entities(struct iss_resizer_device *resizer)
 770 {
 771         struct v4l2_subdev *sd = &resizer->subdev;
 772         struct media_pad *pads = resizer->pads;
 773         struct media_entity *me = &sd->entity;
 774         int ret;
 775 
 776         resizer->input = RESIZER_INPUT_NONE;
 777 
 778         v4l2_subdev_init(sd, &resizer_v4l2_ops);
 779         sd->internal_ops = &resizer_v4l2_internal_ops;
 780         strscpy(sd->name, "OMAP4 ISS ISP resizer", sizeof(sd->name));
 781         sd->grp_id = BIT(16);   /* group ID for iss subdevs */
 782         v4l2_set_subdevdata(sd, resizer);
 783         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 784 
 785         pads[RESIZER_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
 786         pads[RESIZER_PAD_SOURCE_MEM].flags = MEDIA_PAD_FL_SOURCE;
 787 
 788         me->ops = &resizer_media_ops;
 789         ret = media_entity_pads_init(me, RESIZER_PADS_NUM, pads);
 790         if (ret < 0)
 791                 return ret;
 792 
 793         resizer_init_formats(sd, NULL);
 794 
 795         resizer->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 796         resizer->video_out.ops = &resizer_video_ops;
 797         resizer->video_out.iss = to_iss_device(resizer);
 798         resizer->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
 799         resizer->video_out.bpl_alignment = 32;
 800         resizer->video_out.bpl_zero_padding = 1;
 801         resizer->video_out.bpl_max = 0x1ffe0;
 802 
 803         return omap4iss_video_init(&resizer->video_out, "ISP resizer a");
 804 }
 805 
 806 void omap4iss_resizer_unregister_entities(struct iss_resizer_device *resizer)
 807 {
 808         v4l2_device_unregister_subdev(&resizer->subdev);
 809         omap4iss_video_unregister(&resizer->video_out);
 810 }
 811 
 812 int omap4iss_resizer_register_entities(struct iss_resizer_device *resizer,
 813                                        struct v4l2_device *vdev)
 814 {
 815         int ret;
 816 
 817         /* Register the subdev and video node. */
 818         ret = v4l2_device_register_subdev(vdev, &resizer->subdev);
 819         if (ret < 0)
 820                 goto error;
 821 
 822         ret = omap4iss_video_register(&resizer->video_out, vdev);
 823         if (ret < 0)
 824                 goto error;
 825 
 826         return 0;
 827 
 828 error:
 829         omap4iss_resizer_unregister_entities(resizer);
 830         return ret;
 831 }
 832 
 833 /* -----------------------------------------------------------------------------
 834  * ISP RESIZER initialisation and cleanup
 835  */
 836 
 837 /*
 838  * omap4iss_resizer_init - RESIZER module initialization.
 839  * @iss: Device pointer specific to the OMAP4 ISS.
 840  *
 841  * TODO: Get the initialisation values from platform data.
 842  *
 843  * Return 0 on success or a negative error code otherwise.
 844  */
 845 int omap4iss_resizer_init(struct iss_device *iss)
 846 {
 847         struct iss_resizer_device *resizer = &iss->resizer;
 848 
 849         resizer->state = ISS_PIPELINE_STREAM_STOPPED;
 850         init_waitqueue_head(&resizer->wait);
 851 
 852         return resizer_init_entities(resizer);
 853 }
 854 
 855 /*
 856  * omap4iss_resizer_create_links() - RESIZER pads links creation
 857  * @iss: Pointer to ISS device
 858  *
 859  * return negative error code or zero on success
 860  */
 861 int omap4iss_resizer_create_links(struct iss_device *iss)
 862 {
 863         struct iss_resizer_device *resizer = &iss->resizer;
 864 
 865         /* Connect the RESIZER subdev to the video node. */
 866         return media_create_pad_link(&resizer->subdev.entity,
 867                                      RESIZER_PAD_SOURCE_MEM,
 868                                      &resizer->video_out.video.entity, 0, 0);
 869 }
 870 
 871 /*
 872  * omap4iss_resizer_cleanup - RESIZER module cleanup.
 873  * @iss: Device pointer specific to the OMAP4 ISS.
 874  */
 875 void omap4iss_resizer_cleanup(struct iss_device *iss)
 876 {
 877         struct iss_resizer_device *resizer = &iss->resizer;
 878 
 879         media_entity_cleanup(&resizer->subdev.entity);
 880 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/staging/media/omap4iss/iss_resizer.c

DEFINITIONS
