drivers/media/platform/omap3isp/ispresizer.c

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This source file includes following definitions.
__resizer_get_format
__resizer_get_crop
resizer_set_filters
resizer_set_bilinear
resizer_set_ycpos
resizer_set_phase
resizer_set_luma
resizer_set_source
resizer_set_ratio
resizer_set_output_size
resizer_set_output_offset
resizer_set_start
resizer_set_input_size
resizer_set_input_offset
resizer_set_intype
__resizer_set_inaddr
omap3isp_resizer_max_rate
resizer_adjust_bandwidth
omap3isp_resizer_busy
resizer_set_inaddr
resizer_set_outaddr
resizer_print_status
resizer_calc_ratios
resizer_set_crop_params
resizer_configure
resizer_enable_oneshot
omap3isp_resizer_isr_frame_sync
resizer_isr_buffer
omap3isp_resizer_isr
resizer_video_queue
resizer_set_stream
resizer_try_crop
resizer_get_selection
resizer_set_selection
resizer_max_in_width
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
omap3isp_resizer_unregister_entities
omap3isp_resizer_register_entities
resizer_init_entities
omap3isp_resizer_init
omap3isp_resizer_cleanup
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ispresizer.c
   4  *
   5  * TI OMAP3 ISP - Resizer module
   6  *
   7  * Copyright (C) 2010 Nokia Corporation
   8  * Copyright (C) 2009 Texas Instruments, Inc
   9  *
  10  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  11  *           Sakari Ailus <sakari.ailus@iki.fi>
  12  */
  13 
  14 #include <linux/device.h>
  15 #include <linux/mm.h>
  16 #include <linux/module.h>
  17 
  18 #include "isp.h"
  19 #include "ispreg.h"
  20 #include "ispresizer.h"
  21 
  22 /*
  23  * Resizer Constants
  24  */
  25 #define MIN_RESIZE_VALUE                64
  26 #define MID_RESIZE_VALUE                512
  27 #define MAX_RESIZE_VALUE                1024
  28 
  29 #define MIN_IN_WIDTH                    32
  30 #define MIN_IN_HEIGHT                   32
  31 #define MAX_IN_WIDTH_MEMORY_MODE        4095
  32 #define MAX_IN_WIDTH_ONTHEFLY_MODE_ES1  1280
  33 #define MAX_IN_WIDTH_ONTHEFLY_MODE_ES2  4095
  34 #define MAX_IN_HEIGHT                   4095
  35 
  36 #define MIN_OUT_WIDTH                   16
  37 #define MIN_OUT_HEIGHT                  2
  38 #define MAX_OUT_HEIGHT                  4095
  39 
  40 /*
  41  * Resizer Use Constraints
  42  * "TRM ES3.1, table 12-46"
  43  */
  44 #define MAX_4TAP_OUT_WIDTH_ES1          1280
  45 #define MAX_7TAP_OUT_WIDTH_ES1          640
  46 #define MAX_4TAP_OUT_WIDTH_ES2          3312
  47 #define MAX_7TAP_OUT_WIDTH_ES2          1650
  48 #define MAX_4TAP_OUT_WIDTH_3630         4096
  49 #define MAX_7TAP_OUT_WIDTH_3630         2048
  50 
  51 /*
  52  * Constants for ratio calculation
  53  */
  54 #define RESIZE_DIVISOR                  256
  55 #define DEFAULT_PHASE                   1
  56 
  57 /*
  58  * Default (and only) configuration of filter coefficients.
  59  * 7-tap mode is for scale factors 0.25x to 0.5x.
  60  * 4-tap mode is for scale factors 0.5x to 4.0x.
  61  * There shouldn't be any reason to recalculate these, EVER.
  62  */
  63 static const struct isprsz_coef filter_coefs = {
  64         /* For 8-phase 4-tap horizontal filter: */
  65         {
  66                 0x0000, 0x0100, 0x0000, 0x0000,
  67                 0x03FA, 0x00F6, 0x0010, 0x0000,
  68                 0x03F9, 0x00DB, 0x002C, 0x0000,
  69                 0x03FB, 0x00B3, 0x0053, 0x03FF,
  70                 0x03FD, 0x0082, 0x0084, 0x03FD,
  71                 0x03FF, 0x0053, 0x00B3, 0x03FB,
  72                 0x0000, 0x002C, 0x00DB, 0x03F9,
  73                 0x0000, 0x0010, 0x00F6, 0x03FA
  74         },
  75         /* For 8-phase 4-tap vertical filter: */
  76         {
  77                 0x0000, 0x0100, 0x0000, 0x0000,
  78                 0x03FA, 0x00F6, 0x0010, 0x0000,
  79                 0x03F9, 0x00DB, 0x002C, 0x0000,
  80                 0x03FB, 0x00B3, 0x0053, 0x03FF,
  81                 0x03FD, 0x0082, 0x0084, 0x03FD,
  82                 0x03FF, 0x0053, 0x00B3, 0x03FB,
  83                 0x0000, 0x002C, 0x00DB, 0x03F9,
  84                 0x0000, 0x0010, 0x00F6, 0x03FA
  85         },
  86         /* For 4-phase 7-tap horizontal filter: */
  87         #define DUMMY 0
  88         {
  89                 0x0004, 0x0023, 0x005A, 0x0058, 0x0023, 0x0004, 0x0000, DUMMY,
  90                 0x0002, 0x0018, 0x004d, 0x0060, 0x0031, 0x0008, 0x0000, DUMMY,
  91                 0x0001, 0x000f, 0x003f, 0x0062, 0x003f, 0x000f, 0x0001, DUMMY,
  92                 0x0000, 0x0008, 0x0031, 0x0060, 0x004d, 0x0018, 0x0002, DUMMY
  93         },
  94         /* For 4-phase 7-tap vertical filter: */
  95         {
  96                 0x0004, 0x0023, 0x005A, 0x0058, 0x0023, 0x0004, 0x0000, DUMMY,
  97                 0x0002, 0x0018, 0x004d, 0x0060, 0x0031, 0x0008, 0x0000, DUMMY,
  98                 0x0001, 0x000f, 0x003f, 0x0062, 0x003f, 0x000f, 0x0001, DUMMY,
  99                 0x0000, 0x0008, 0x0031, 0x0060, 0x004d, 0x0018, 0x0002, DUMMY
 100         }
 101         /*
 102          * The dummy padding is required in 7-tap mode because of how the
 103          * registers are arranged physically.
 104          */
 105         #undef DUMMY
 106 };
 107 
 108 /*
 109  * __resizer_get_format - helper function for getting resizer format
 110  * @res   : pointer to resizer private structure
 111  * @pad   : pad number
 112  * @cfg: V4L2 subdev pad configuration
 113  * @which : wanted subdev format
 114  * return zero
 115  */
 116 static struct v4l2_mbus_framefmt *
 117 __resizer_get_format(struct isp_res_device *res, struct v4l2_subdev_pad_config *cfg,
 118                      unsigned int pad, enum v4l2_subdev_format_whence which)
 119 {
 120         if (which == V4L2_SUBDEV_FORMAT_TRY)
 121                 return v4l2_subdev_get_try_format(&res->subdev, cfg, pad);
 122         else
 123                 return &res->formats[pad];
 124 }
 125 
 126 /*
 127  * __resizer_get_crop - helper function for getting resizer crop rectangle
 128  * @res   : pointer to resizer private structure
 129  * @cfg: V4L2 subdev pad configuration
 130  * @which : wanted subdev crop rectangle
 131  */
 132 static struct v4l2_rect *
 133 __resizer_get_crop(struct isp_res_device *res, struct v4l2_subdev_pad_config *cfg,
 134                    enum v4l2_subdev_format_whence which)
 135 {
 136         if (which == V4L2_SUBDEV_FORMAT_TRY)
 137                 return v4l2_subdev_get_try_crop(&res->subdev, cfg, RESZ_PAD_SINK);
 138         else
 139                 return &res->crop.request;
 140 }
 141 
 142 /*
 143  * resizer_set_filters - Set resizer filters
 144  * @res: Device context.
 145  * @h_coeff: horizontal coefficient
 146  * @v_coeff: vertical coefficient
 147  * Return none
 148  */
 149 static void resizer_set_filters(struct isp_res_device *res, const u16 *h_coeff,
 150                                 const u16 *v_coeff)
 151 {
 152         struct isp_device *isp = to_isp_device(res);
 153         u32 startaddr_h, startaddr_v, tmp_h, tmp_v;
 154         int i;
 155 
 156         startaddr_h = ISPRSZ_HFILT10;
 157         startaddr_v = ISPRSZ_VFILT10;
 158 
 159         for (i = 0; i < COEFF_CNT; i += 2) {
 160                 tmp_h = h_coeff[i] |
 161                         (h_coeff[i + 1] << ISPRSZ_HFILT_COEF1_SHIFT);
 162                 tmp_v = v_coeff[i] |
 163                         (v_coeff[i + 1] << ISPRSZ_VFILT_COEF1_SHIFT);
 164                 isp_reg_writel(isp, tmp_h, OMAP3_ISP_IOMEM_RESZ, startaddr_h);
 165                 isp_reg_writel(isp, tmp_v, OMAP3_ISP_IOMEM_RESZ, startaddr_v);
 166                 startaddr_h += 4;
 167                 startaddr_v += 4;
 168         }
 169 }
 170 
 171 /*
 172  * resizer_set_bilinear - Chrominance horizontal algorithm select
 173  * @res: Device context.
 174  * @type: Filtering interpolation type.
 175  *
 176  * Filtering that is same as luminance processing is
 177  * intended only for downsampling, and bilinear interpolation
 178  * is intended only for upsampling.
 179  */
 180 static void resizer_set_bilinear(struct isp_res_device *res,
 181                                  enum resizer_chroma_algo type)
 182 {
 183         struct isp_device *isp = to_isp_device(res);
 184 
 185         if (type == RSZ_BILINEAR)
 186                 isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 187                             ISPRSZ_CNT_CBILIN);
 188         else
 189                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 190                             ISPRSZ_CNT_CBILIN);
 191 }
 192 
 193 /*
 194  * resizer_set_ycpos - Luminance and chrominance order
 195  * @res: Device context.
 196  * @pixelcode: pixel code.
 197  */
 198 static void resizer_set_ycpos(struct isp_res_device *res, u32 pixelcode)
 199 {
 200         struct isp_device *isp = to_isp_device(res);
 201 
 202         switch (pixelcode) {
 203         case MEDIA_BUS_FMT_YUYV8_1X16:
 204                 isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 205                             ISPRSZ_CNT_YCPOS);
 206                 break;
 207         case MEDIA_BUS_FMT_UYVY8_1X16:
 208                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 209                             ISPRSZ_CNT_YCPOS);
 210                 break;
 211         default:
 212                 return;
 213         }
 214 }
 215 
 216 /*
 217  * resizer_set_phase - Setup horizontal and vertical starting phase
 218  * @res: Device context.
 219  * @h_phase: horizontal phase parameters.
 220  * @v_phase: vertical phase parameters.
 221  *
 222  * Horizontal and vertical phase range is 0 to 7
 223  */
 224 static void resizer_set_phase(struct isp_res_device *res, u32 h_phase,
 225                               u32 v_phase)
 226 {
 227         struct isp_device *isp = to_isp_device(res);
 228         u32 rgval;
 229 
 230         rgval = isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT) &
 231               ~(ISPRSZ_CNT_HSTPH_MASK | ISPRSZ_CNT_VSTPH_MASK);
 232         rgval |= (h_phase << ISPRSZ_CNT_HSTPH_SHIFT) & ISPRSZ_CNT_HSTPH_MASK;
 233         rgval |= (v_phase << ISPRSZ_CNT_VSTPH_SHIFT) & ISPRSZ_CNT_VSTPH_MASK;
 234 
 235         isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT);
 236 }
 237 
 238 /*
 239  * resizer_set_luma - Setup luminance enhancer parameters
 240  * @res: Device context.
 241  * @luma: Structure for luminance enhancer parameters.
 242  *
 243  * Algorithm select:
 244  *  0x0: Disable
 245  *  0x1: [-1  2 -1]/2 high-pass filter
 246  *  0x2: [-1 -2  6 -2 -1]/4 high-pass filter
 247  *
 248  * Maximum gain:
 249  *  The data is coded in U4Q4 representation.
 250  *
 251  * Slope:
 252  *  The data is coded in U4Q4 representation.
 253  *
 254  * Coring offset:
 255  *  The data is coded in U8Q0 representation.
 256  *
 257  * The new luminance value is computed as:
 258  *  Y += HPF(Y) x max(GAIN, (HPF(Y) - CORE) x SLOP + 8) >> 4.
 259  */
 260 static void resizer_set_luma(struct isp_res_device *res,
 261                              struct resizer_luma_yenh *luma)
 262 {
 263         struct isp_device *isp = to_isp_device(res);
 264         u32 rgval;
 265 
 266         rgval  = (luma->algo << ISPRSZ_YENH_ALGO_SHIFT)
 267                   & ISPRSZ_YENH_ALGO_MASK;
 268         rgval |= (luma->gain << ISPRSZ_YENH_GAIN_SHIFT)
 269                   & ISPRSZ_YENH_GAIN_MASK;
 270         rgval |= (luma->slope << ISPRSZ_YENH_SLOP_SHIFT)
 271                   & ISPRSZ_YENH_SLOP_MASK;
 272         rgval |= (luma->core << ISPRSZ_YENH_CORE_SHIFT)
 273                   & ISPRSZ_YENH_CORE_MASK;
 274 
 275         isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_YENH);
 276 }
 277 
 278 /*
 279  * resizer_set_source - Input source select
 280  * @res: Device context.
 281  * @source: Input source type
 282  *
 283  * If this field is set to RESIZER_INPUT_VP, the resizer input is fed from
 284  * Preview/CCDC engine, otherwise from memory.
 285  */
 286 static void resizer_set_source(struct isp_res_device *res,
 287                                enum resizer_input_entity source)
 288 {
 289         struct isp_device *isp = to_isp_device(res);
 290 
 291         if (source == RESIZER_INPUT_MEMORY)
 292                 isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 293                             ISPRSZ_CNT_INPSRC);
 294         else
 295                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 296                             ISPRSZ_CNT_INPSRC);
 297 }
 298 
 299 /*
 300  * resizer_set_ratio - Setup horizontal and vertical resizing value
 301  * @res: Device context.
 302  * @ratio: Structure for ratio parameters.
 303  *
 304  * Resizing range from 64 to 1024
 305  */
 306 static void resizer_set_ratio(struct isp_res_device *res,
 307                               const struct resizer_ratio *ratio)
 308 {
 309         struct isp_device *isp = to_isp_device(res);
 310         const u16 *h_filter, *v_filter;
 311         u32 rgval;
 312 
 313         rgval = isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT) &
 314                               ~(ISPRSZ_CNT_HRSZ_MASK | ISPRSZ_CNT_VRSZ_MASK);
 315         rgval |= ((ratio->horz - 1) << ISPRSZ_CNT_HRSZ_SHIFT)
 316                   & ISPRSZ_CNT_HRSZ_MASK;
 317         rgval |= ((ratio->vert - 1) << ISPRSZ_CNT_VRSZ_SHIFT)
 318                   & ISPRSZ_CNT_VRSZ_MASK;
 319         isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT);
 320 
 321         /* prepare horizontal filter coefficients */
 322         if (ratio->horz > MID_RESIZE_VALUE)
 323                 h_filter = &filter_coefs.h_filter_coef_7tap[0];
 324         else
 325                 h_filter = &filter_coefs.h_filter_coef_4tap[0];
 326 
 327         /* prepare vertical filter coefficients */
 328         if (ratio->vert > MID_RESIZE_VALUE)
 329                 v_filter = &filter_coefs.v_filter_coef_7tap[0];
 330         else
 331                 v_filter = &filter_coefs.v_filter_coef_4tap[0];
 332 
 333         resizer_set_filters(res, h_filter, v_filter);
 334 }
 335 
 336 /*
 337  * resizer_set_dst_size - Setup the output height and width
 338  * @res: Device context.
 339  * @width: Output width.
 340  * @height: Output height.
 341  *
 342  * Width :
 343  *  The value must be EVEN.
 344  *
 345  * Height:
 346  *  The number of bytes written to SDRAM must be
 347  *  a multiple of 16-bytes if the vertical resizing factor
 348  *  is greater than 1x (upsizing)
 349  */
 350 static void resizer_set_output_size(struct isp_res_device *res,
 351                                     u32 width, u32 height)
 352 {
 353         struct isp_device *isp = to_isp_device(res);
 354         u32 rgval;
 355 
 356         rgval  = (width << ISPRSZ_OUT_SIZE_HORZ_SHIFT)
 357                  & ISPRSZ_OUT_SIZE_HORZ_MASK;
 358         rgval |= (height << ISPRSZ_OUT_SIZE_VERT_SHIFT)
 359                  & ISPRSZ_OUT_SIZE_VERT_MASK;
 360         isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_OUT_SIZE);
 361 }
 362 
 363 /*
 364  * resizer_set_output_offset - Setup memory offset for the output lines.
 365  * @res: Device context.
 366  * @offset: Memory offset.
 367  *
 368  * The 5 LSBs are forced to be zeros by the hardware to align on a 32-byte
 369  * boundary; the 5 LSBs are read-only. For optimal use of SDRAM bandwidth,
 370  * the SDRAM line offset must be set on a 256-byte boundary
 371  */
 372 static void resizer_set_output_offset(struct isp_res_device *res, u32 offset)
 373 {
 374         struct isp_device *isp = to_isp_device(res);
 375 
 376         isp_reg_writel(isp, offset, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_OUTOFF);
 377 }
 378 
 379 /*
 380  * resizer_set_start - Setup vertical and horizontal start position
 381  * @res: Device context.
 382  * @left: Horizontal start position.
 383  * @top: Vertical start position.
 384  *
 385  * Vertical start line:
 386  *  This field makes sense only when the resizer obtains its input
 387  *  from the preview engine/CCDC
 388  *
 389  * Horizontal start pixel:
 390  *  Pixels are coded on 16 bits for YUV and 8 bits for color separate data.
 391  *  When the resizer gets its input from SDRAM, this field must be set
 392  *  to <= 15 for YUV 16-bit data and <= 31 for 8-bit color separate data
 393  */
 394 static void resizer_set_start(struct isp_res_device *res, u32 left, u32 top)
 395 {
 396         struct isp_device *isp = to_isp_device(res);
 397         u32 rgval;
 398 
 399         rgval = (left << ISPRSZ_IN_START_HORZ_ST_SHIFT)
 400                 & ISPRSZ_IN_START_HORZ_ST_MASK;
 401         rgval |= (top << ISPRSZ_IN_START_VERT_ST_SHIFT)
 402                  & ISPRSZ_IN_START_VERT_ST_MASK;
 403 
 404         isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_IN_START);
 405 }
 406 
 407 /*
 408  * resizer_set_input_size - Setup the input size
 409  * @res: Device context.
 410  * @width: The range is 0 to 4095 pixels
 411  * @height: The range is 0 to 4095 lines
 412  */
 413 static void resizer_set_input_size(struct isp_res_device *res,
 414                                    u32 width, u32 height)
 415 {
 416         struct isp_device *isp = to_isp_device(res);
 417         u32 rgval;
 418 
 419         rgval = (width << ISPRSZ_IN_SIZE_HORZ_SHIFT)
 420                 & ISPRSZ_IN_SIZE_HORZ_MASK;
 421         rgval |= (height << ISPRSZ_IN_SIZE_VERT_SHIFT)
 422                  & ISPRSZ_IN_SIZE_VERT_MASK;
 423 
 424         isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_IN_SIZE);
 425 }
 426 
 427 /*
 428  * resizer_set_src_offs - Setup the memory offset for the input lines
 429  * @res: Device context.
 430  * @offset: Memory offset.
 431  *
 432  * The 5 LSBs are forced to be zeros by the hardware to align on a 32-byte
 433  * boundary; the 5 LSBs are read-only. This field must be programmed to be
 434  * 0x0 if the resizer input is from preview engine/CCDC.
 435  */
 436 static void resizer_set_input_offset(struct isp_res_device *res, u32 offset)
 437 {
 438         struct isp_device *isp = to_isp_device(res);
 439 
 440         isp_reg_writel(isp, offset, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_INOFF);
 441 }
 442 
 443 /*
 444  * resizer_set_intype - Input type select
 445  * @res: Device context.
 446  * @type: Pixel format type.
 447  */
 448 static void resizer_set_intype(struct isp_res_device *res,
 449                                enum resizer_colors_type type)
 450 {
 451         struct isp_device *isp = to_isp_device(res);
 452 
 453         if (type == RSZ_COLOR8)
 454                 isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 455                             ISPRSZ_CNT_INPTYP);
 456         else
 457                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
 458                             ISPRSZ_CNT_INPTYP);
 459 }
 460 
 461 /*
 462  * __resizer_set_inaddr - Helper function for set input address
 463  * @res : pointer to resizer private data structure
 464  * @addr: input address
 465  * return none
 466  */
 467 static void __resizer_set_inaddr(struct isp_res_device *res, u32 addr)
 468 {
 469         struct isp_device *isp = to_isp_device(res);
 470 
 471         isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_INADD);
 472 }
 473 
 474 /*
 475  * The data rate at the horizontal resizer output must not exceed half the
 476  * functional clock or 100 MP/s, whichever is lower. According to the TRM
 477  * there's no similar requirement for the vertical resizer output. However
 478  * experience showed that vertical upscaling by 4 leads to SBL overflows (with
 479  * data rates at the resizer output exceeding 300 MP/s). Limiting the resizer
 480  * output data rate to the functional clock or 200 MP/s, whichever is lower,
 481  * seems to get rid of SBL overflows.
 482  *
 483  * The maximum data rate at the output of the horizontal resizer can thus be
 484  * computed with
 485  *
 486  * max intermediate rate <= L3 clock * input height / output height
 487  * max intermediate rate <= L3 clock / 2
 488  *
 489  * The maximum data rate at the resizer input is then
 490  *
 491  * max input rate <= max intermediate rate * input width / output width
 492  *
 493  * where the input width and height are the resizer input crop rectangle size.
 494  * The TRM doesn't clearly explain if that's a maximum instant data rate or a
 495  * maximum average data rate.
 496  */
 497 void omap3isp_resizer_max_rate(struct isp_res_device *res,
 498                                unsigned int *max_rate)
 499 {
 500         struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
 501         const struct v4l2_mbus_framefmt *ofmt = &res->formats[RESZ_PAD_SOURCE];
 502         unsigned long limit = min(pipe->l3_ick, 200000000UL);
 503         unsigned long clock;
 504 
 505         clock = div_u64((u64)limit * res->crop.active.height, ofmt->height);
 506         clock = min(clock, limit / 2);
 507         *max_rate = div_u64((u64)clock * res->crop.active.width, ofmt->width);
 508 }
 509 
 510 /*
 511  * When the resizer processes images from memory, the driver must slow down read
 512  * requests on the input to at least comply with the internal data rate
 513  * requirements. If the application real-time requirements can cope with slower
 514  * processing, the resizer can be slowed down even more to put less pressure on
 515  * the overall system.
 516  *
 517  * When the resizer processes images on the fly (either from the CCDC or the
 518  * preview module), the same data rate requirements apply but they can't be
 519  * enforced at the resizer level. The image input module (sensor, CCP2 or
 520  * preview module) must not provide image data faster than the resizer can
 521  * process.
 522  *
 523  * For live image pipelines, the data rate is set by the frame format, size and
 524  * rate. The sensor output frame rate must not exceed the maximum resizer data
 525  * rate.
 526  *
 527  * The resizer slows down read requests by inserting wait cycles in the SBL
 528  * requests. The maximum number of 256-byte requests per second can be computed
 529  * as (the data rate is multiplied by 2 to convert from pixels per second to
 530  * bytes per second)
 531  *
 532  * request per second = data rate * 2 / 256
 533  * cycles per request = cycles per second / requests per second
 534  *
 535  * The number of cycles per second is controlled by the L3 clock, leading to
 536  *
 537  * cycles per request = L3 frequency / 2 * 256 / data rate
 538  */
 539 static void resizer_adjust_bandwidth(struct isp_res_device *res)
 540 {
 541         struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
 542         struct isp_device *isp = to_isp_device(res);
 543         unsigned long l3_ick = pipe->l3_ick;
 544         struct v4l2_fract *timeperframe;
 545         unsigned int cycles_per_frame;
 546         unsigned int requests_per_frame;
 547         unsigned int cycles_per_request;
 548         unsigned int granularity;
 549         unsigned int minimum;
 550         unsigned int maximum;
 551         unsigned int value;
 552 
 553         if (res->input != RESIZER_INPUT_MEMORY) {
 554                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
 555                             ISPSBL_SDR_REQ_RSZ_EXP_MASK);
 556                 return;
 557         }
 558 
 559         switch (isp->revision) {
 560         case ISP_REVISION_1_0:
 561         case ISP_REVISION_2_0:
 562         default:
 563                 granularity = 1024;
 564                 break;
 565 
 566         case ISP_REVISION_15_0:
 567                 granularity = 32;
 568                 break;
 569         }
 570 
 571         /* Compute the minimum number of cycles per request, based on the
 572          * pipeline maximum data rate. This is an absolute lower bound if we
 573          * don't want SBL overflows, so round the value up.
 574          */
 575         cycles_per_request = div_u64((u64)l3_ick / 2 * 256 + pipe->max_rate - 1,
 576                                      pipe->max_rate);
 577         minimum = DIV_ROUND_UP(cycles_per_request, granularity);
 578 
 579         /* Compute the maximum number of cycles per request, based on the
 580          * requested frame rate. This is a soft upper bound to achieve a frame
 581          * rate equal or higher than the requested value, so round the value
 582          * down.
 583          */
 584         timeperframe = &pipe->max_timeperframe;
 585 
 586         requests_per_frame = DIV_ROUND_UP(res->crop.active.width * 2, 256)
 587                            * res->crop.active.height;
 588         cycles_per_frame = div_u64((u64)l3_ick * timeperframe->numerator,
 589                                    timeperframe->denominator);
 590         cycles_per_request = cycles_per_frame / requests_per_frame;
 591 
 592         maximum = cycles_per_request / granularity;
 593 
 594         value = max(minimum, maximum);
 595 
 596         dev_dbg(isp->dev, "%s: cycles per request = %u\n", __func__, value);
 597         isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
 598                         ISPSBL_SDR_REQ_RSZ_EXP_MASK,
 599                         value << ISPSBL_SDR_REQ_RSZ_EXP_SHIFT);
 600 }
 601 
 602 /*
 603  * omap3isp_resizer_busy - Checks if ISP resizer is busy.
 604  *
 605  * Returns busy field from ISPRSZ_PCR register.
 606  */
 607 int omap3isp_resizer_busy(struct isp_res_device *res)
 608 {
 609         struct isp_device *isp = to_isp_device(res);
 610 
 611         return isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_PCR) &
 612                              ISPRSZ_PCR_BUSY;
 613 }
 614 
 615 /*
 616  * resizer_set_inaddr - Sets the memory address of the input frame.
 617  * @addr: 32bit memory address aligned on 32byte boundary.
 618  */
 619 static void resizer_set_inaddr(struct isp_res_device *res, u32 addr)
 620 {
 621         res->addr_base = addr;
 622 
 623         /* This will handle crop settings in stream off state */
 624         if (res->crop_offset)
 625                 addr += res->crop_offset & ~0x1f;
 626 
 627         __resizer_set_inaddr(res, addr);
 628 }
 629 
 630 /*
 631  * Configures the memory address to which the output frame is written.
 632  * @addr: 32bit memory address aligned on 32byte boundary.
 633  * Note: For SBL efficiency reasons the address should be on a 256-byte
 634  * boundary.
 635  */
 636 static void resizer_set_outaddr(struct isp_res_device *res, u32 addr)
 637 {
 638         struct isp_device *isp = to_isp_device(res);
 639 
 640         /*
 641          * Set output address. This needs to be in its own function
 642          * because it changes often.
 643          */
 644         isp_reg_writel(isp, addr << ISPRSZ_SDR_OUTADD_ADDR_SHIFT,
 645                        OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_OUTADD);
 646 }
 647 
 648 /*
 649  * resizer_print_status - Prints the values of the resizer module registers.
 650  */
 651 #define RSZ_PRINT_REGISTER(isp, name)\
 652         dev_dbg(isp->dev, "###RSZ " #name "=0x%08x\n", \
 653                 isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_##name))
 654 
 655 static void resizer_print_status(struct isp_res_device *res)
 656 {
 657         struct isp_device *isp = to_isp_device(res);
 658 
 659         dev_dbg(isp->dev, "-------------Resizer Register dump----------\n");
 660 
 661         RSZ_PRINT_REGISTER(isp, PCR);
 662         RSZ_PRINT_REGISTER(isp, CNT);
 663         RSZ_PRINT_REGISTER(isp, OUT_SIZE);
 664         RSZ_PRINT_REGISTER(isp, IN_START);
 665         RSZ_PRINT_REGISTER(isp, IN_SIZE);
 666         RSZ_PRINT_REGISTER(isp, SDR_INADD);
 667         RSZ_PRINT_REGISTER(isp, SDR_INOFF);
 668         RSZ_PRINT_REGISTER(isp, SDR_OUTADD);
 669         RSZ_PRINT_REGISTER(isp, SDR_OUTOFF);
 670         RSZ_PRINT_REGISTER(isp, YENH);
 671 
 672         dev_dbg(isp->dev, "--------------------------------------------\n");
 673 }
 674 
 675 /*
 676  * resizer_calc_ratios - Helper function for calculating resizer ratios
 677  * @res: pointer to resizer private data structure
 678  * @input: input frame size
 679  * @output: output frame size
 680  * @ratio : return calculated ratios
 681  * return none
 682  *
 683  * The resizer uses a polyphase sample rate converter. The upsampling filter
 684  * has a fixed number of phases that depend on the resizing ratio. As the ratio
 685  * computation depends on the number of phases, we need to compute a first
 686  * approximation and then refine it.
 687  *
 688  * The input/output/ratio relationship is given by the OMAP34xx TRM:
 689  *
 690  * - 8-phase, 4-tap mode (RSZ = 64 ~ 512)
 691  *      iw = (32 * sph + (ow - 1) * hrsz + 16) >> 8 + 7
 692  *      ih = (32 * spv + (oh - 1) * vrsz + 16) >> 8 + 4
 693  * - 4-phase, 7-tap mode (RSZ = 513 ~ 1024)
 694  *      iw = (64 * sph + (ow - 1) * hrsz + 32) >> 8 + 7
 695  *      ih = (64 * spv + (oh - 1) * vrsz + 32) >> 8 + 7
 696  *
 697  * iw and ih are the input width and height after cropping. Those equations need
 698  * to be satisfied exactly for the resizer to work correctly.
 699  *
 700  * The equations can't be easily reverted, as the >> 8 operation is not linear.
 701  * In addition, not all input sizes can be achieved for a given output size. To
 702  * get the highest input size lower than or equal to the requested input size,
 703  * we need to compute the highest resizing ratio that satisfies the following
 704  * inequality (taking the 4-tap mode width equation as an example)
 705  *
 706  *      iw >= (32 * sph + (ow - 1) * hrsz + 16) >> 8 - 7
 707  *
 708  * (where iw is the requested input width) which can be rewritten as
 709  *
 710  *        iw - 7            >= (32 * sph + (ow - 1) * hrsz + 16) >> 8
 711  *       (iw - 7) << 8      >=  32 * sph + (ow - 1) * hrsz + 16 - b
 712  *      ((iw - 7) << 8) + b >=  32 * sph + (ow - 1) * hrsz + 16
 713  *
 714  * where b is the value of the 8 least significant bits of the right hand side
 715  * expression of the last inequality. The highest resizing ratio value will be
 716  * achieved when b is equal to its maximum value of 255. That resizing ratio
 717  * value will still satisfy the original inequality, as b will disappear when
 718  * the expression will be shifted right by 8.
 719  *
 720  * The reverted equations thus become
 721  *
 722  * - 8-phase, 4-tap mode
 723  *      hrsz = ((iw - 7) * 256 + 255 - 16 - 32 * sph) / (ow - 1)
 724  *      vrsz = ((ih - 4) * 256 + 255 - 16 - 32 * spv) / (oh - 1)
 725  * - 4-phase, 7-tap mode
 726  *      hrsz = ((iw - 7) * 256 + 255 - 32 - 64 * sph) / (ow - 1)
 727  *      vrsz = ((ih - 7) * 256 + 255 - 32 - 64 * spv) / (oh - 1)
 728  *
 729  * The ratios are integer values, and are rounded down to ensure that the
 730  * cropped input size is not bigger than the uncropped input size.
 731  *
 732  * As the number of phases/taps, used to select the correct equations to compute
 733  * the ratio, depends on the ratio, we start with the 4-tap mode equations to
 734  * compute an approximation of the ratio, and switch to the 7-tap mode equations
 735  * if the approximation is higher than the ratio threshold.
 736  *
 737  * As the 7-tap mode equations will return a ratio smaller than or equal to the
 738  * 4-tap mode equations, the resulting ratio could become lower than or equal to
 739  * the ratio threshold. This 'equations loop' isn't an issue as long as the
 740  * correct equations are used to compute the final input size. Starting with the
 741  * 4-tap mode equations ensure that, in case of values resulting in a 'ratio
 742  * loop', the smallest of the ratio values will be used, never exceeding the
 743  * requested input size.
 744  *
 745  * We first clamp the output size according to the hardware capability to avoid
 746  * auto-cropping the input more than required to satisfy the TRM equations. The
 747  * minimum output size is achieved with a scaling factor of 1024. It is thus
 748  * computed using the 7-tap equations.
 749  *
 750  *      min ow = ((iw - 7) * 256 - 32 - 64 * sph) / 1024 + 1
 751  *      min oh = ((ih - 7) * 256 - 32 - 64 * spv) / 1024 + 1
 752  *
 753  * Similarly, the maximum output size is achieved with a scaling factor of 64
 754  * and computed using the 4-tap equations.
 755  *
 756  *      max ow = ((iw - 7) * 256 + 255 - 16 - 32 * sph) / 64 + 1
 757  *      max oh = ((ih - 4) * 256 + 255 - 16 - 32 * spv) / 64 + 1
 758  *
 759  * The additional +255 term compensates for the round down operation performed
 760  * by the TRM equations when shifting the value right by 8 bits.
 761  *
 762  * We then compute and clamp the ratios (x1/4 ~ x4). Clamping the output size to
 763  * the maximum value guarantees that the ratio value will never be smaller than
 764  * the minimum, but it could still slightly exceed the maximum. Clamping the
 765  * ratio will thus result in a resizing factor slightly larger than the
 766  * requested value.
 767  *
 768  * To accommodate that, and make sure the TRM equations are satisfied exactly, we
 769  * compute the input crop rectangle as the last step.
 770  *
 771  * As if the situation wasn't complex enough, the maximum output width depends
 772  * on the vertical resizing ratio.  Fortunately, the output height doesn't
 773  * depend on the horizontal resizing ratio. We can then start by computing the
 774  * output height and the vertical ratio, and then move to computing the output
 775  * width and the horizontal ratio.
 776  */
 777 static void resizer_calc_ratios(struct isp_res_device *res,
 778                                 struct v4l2_rect *input,
 779                                 struct v4l2_mbus_framefmt *output,
 780                                 struct resizer_ratio *ratio)
 781 {
 782         struct isp_device *isp = to_isp_device(res);
 783         const unsigned int spv = DEFAULT_PHASE;
 784         const unsigned int sph = DEFAULT_PHASE;
 785         unsigned int upscaled_width;
 786         unsigned int upscaled_height;
 787         unsigned int min_width;
 788         unsigned int min_height;
 789         unsigned int max_width;
 790         unsigned int max_height;
 791         unsigned int width_alignment;
 792         unsigned int width;
 793         unsigned int height;
 794 
 795         /*
 796          * Clamp the output height based on the hardware capabilities and
 797          * compute the vertical resizing ratio.
 798          */
 799         min_height = ((input->height - 7) * 256 - 32 - 64 * spv) / 1024 + 1;
 800         min_height = max_t(unsigned int, min_height, MIN_OUT_HEIGHT);
 801         max_height = ((input->height - 4) * 256 + 255 - 16 - 32 * spv) / 64 + 1;
 802         max_height = min_t(unsigned int, max_height, MAX_OUT_HEIGHT);
 803         output->height = clamp(output->height, min_height, max_height);
 804 
 805         ratio->vert = ((input->height - 4) * 256 + 255 - 16 - 32 * spv)
 806                     / (output->height - 1);
 807         if (ratio->vert > MID_RESIZE_VALUE)
 808                 ratio->vert = ((input->height - 7) * 256 + 255 - 32 - 64 * spv)
 809                             / (output->height - 1);
 810         ratio->vert = clamp_t(unsigned int, ratio->vert,
 811                               MIN_RESIZE_VALUE, MAX_RESIZE_VALUE);
 812 
 813         if (ratio->vert <= MID_RESIZE_VALUE) {
 814                 upscaled_height = (output->height - 1) * ratio->vert
 815                                 + 32 * spv + 16;
 816                 height = (upscaled_height >> 8) + 4;
 817         } else {
 818                 upscaled_height = (output->height - 1) * ratio->vert
 819                                 + 64 * spv + 32;
 820                 height = (upscaled_height >> 8) + 7;
 821         }
 822 
 823         /*
 824          * Compute the minimum and maximum output widths based on the hardware
 825          * capabilities. The maximum depends on the vertical resizing ratio.
 826          */
 827         min_width = ((input->width - 7) * 256 - 32 - 64 * sph) / 1024 + 1;
 828         min_width = max_t(unsigned int, min_width, MIN_OUT_WIDTH);
 829 
 830         if (ratio->vert <= MID_RESIZE_VALUE) {
 831                 switch (isp->revision) {
 832                 case ISP_REVISION_1_0:
 833                         max_width = MAX_4TAP_OUT_WIDTH_ES1;
 834                         break;
 835 
 836                 case ISP_REVISION_2_0:
 837                 default:
 838                         max_width = MAX_4TAP_OUT_WIDTH_ES2;
 839                         break;
 840 
 841                 case ISP_REVISION_15_0:
 842                         max_width = MAX_4TAP_OUT_WIDTH_3630;
 843                         break;
 844                 }
 845         } else {
 846                 switch (isp->revision) {
 847                 case ISP_REVISION_1_0:
 848                         max_width = MAX_7TAP_OUT_WIDTH_ES1;
 849                         break;
 850 
 851                 case ISP_REVISION_2_0:
 852                 default:
 853                         max_width = MAX_7TAP_OUT_WIDTH_ES2;
 854                         break;
 855 
 856                 case ISP_REVISION_15_0:
 857                         max_width = MAX_7TAP_OUT_WIDTH_3630;
 858                         break;
 859                 }
 860         }
 861         max_width = min(((input->width - 7) * 256 + 255 - 16 - 32 * sph) / 64
 862                         + 1, max_width);
 863 
 864         /*
 865          * The output width must be even, and must be a multiple of 16 bytes
 866          * when upscaling vertically. Clamp the output width to the valid range.
 867          * Take the alignment into account (the maximum width in 7-tap mode on
 868          * ES2 isn't a multiple of 8) and align the result up to make sure it
 869          * won't be smaller than the minimum.
 870          */
 871         width_alignment = ratio->vert < 256 ? 8 : 2;
 872         output->width = clamp(output->width, min_width,
 873                               max_width & ~(width_alignment - 1));
 874         output->width = ALIGN(output->width, width_alignment);
 875 
 876         ratio->horz = ((input->width - 7) * 256 + 255 - 16 - 32 * sph)
 877                     / (output->width - 1);
 878         if (ratio->horz > MID_RESIZE_VALUE)
 879                 ratio->horz = ((input->width - 7) * 256 + 255 - 32 - 64 * sph)
 880                             / (output->width - 1);
 881         ratio->horz = clamp_t(unsigned int, ratio->horz,
 882                               MIN_RESIZE_VALUE, MAX_RESIZE_VALUE);
 883 
 884         if (ratio->horz <= MID_RESIZE_VALUE) {
 885                 upscaled_width = (output->width - 1) * ratio->horz
 886                                + 32 * sph + 16;
 887                 width = (upscaled_width >> 8) + 7;
 888         } else {
 889                 upscaled_width = (output->width - 1) * ratio->horz
 890                                + 64 * sph + 32;
 891                 width = (upscaled_width >> 8) + 7;
 892         }
 893 
 894         /* Center the new crop rectangle. */
 895         input->left += (input->width - width) / 2;
 896         input->top += (input->height - height) / 2;
 897         input->width = width;
 898         input->height = height;
 899 }
 900 
 901 /*
 902  * resizer_set_crop_params - Setup hardware with cropping parameters
 903  * @res : resizer private structure
 904  * @input : format on sink pad
 905  * @output : format on source pad
 906  * return none
 907  */
 908 static void resizer_set_crop_params(struct isp_res_device *res,
 909                                     const struct v4l2_mbus_framefmt *input,
 910                                     const struct v4l2_mbus_framefmt *output)
 911 {
 912         resizer_set_ratio(res, &res->ratio);
 913 
 914         /* Set chrominance horizontal algorithm */
 915         if (res->ratio.horz >= RESIZE_DIVISOR)
 916                 resizer_set_bilinear(res, RSZ_THE_SAME);
 917         else
 918                 resizer_set_bilinear(res, RSZ_BILINEAR);
 919 
 920         resizer_adjust_bandwidth(res);
 921 
 922         if (res->input == RESIZER_INPUT_MEMORY) {
 923                 /* Calculate additional offset for crop */
 924                 res->crop_offset = (res->crop.active.top * input->width +
 925                                     res->crop.active.left) * 2;
 926                 /*
 927                  * Write lowest 4 bits of horizontal pixel offset (in pixels),
 928                  * vertical start must be 0.
 929                  */
 930                 resizer_set_start(res, (res->crop_offset / 2) & 0xf, 0);
 931 
 932                 /*
 933                  * Set start (read) address for cropping, in bytes.
 934                  * Lowest 5 bits must be zero.
 935                  */
 936                 __resizer_set_inaddr(res,
 937                                 res->addr_base + (res->crop_offset & ~0x1f));
 938         } else {
 939                 /*
 940                  * Set vertical start line and horizontal starting pixel.
 941                  * If the input is from CCDC/PREV, horizontal start field is
 942                  * in bytes (twice number of pixels).
 943                  */
 944                 resizer_set_start(res, res->crop.active.left * 2,
 945                                   res->crop.active.top);
 946                 /* Input address and offset must be 0 for preview/ccdc input */
 947                 __resizer_set_inaddr(res, 0);
 948                 resizer_set_input_offset(res, 0);
 949         }
 950 
 951         /* Set the input size */
 952         resizer_set_input_size(res, res->crop.active.width,
 953                                res->crop.active.height);
 954 }
 955 
 956 static void resizer_configure(struct isp_res_device *res)
 957 {
 958         struct v4l2_mbus_framefmt *informat, *outformat;
 959         struct resizer_luma_yenh luma = {0, 0, 0, 0};
 960 
 961         resizer_set_source(res, res->input);
 962 
 963         informat = &res->formats[RESZ_PAD_SINK];
 964         outformat = &res->formats[RESZ_PAD_SOURCE];
 965 
 966         /* RESZ_PAD_SINK */
 967         if (res->input == RESIZER_INPUT_VP)
 968                 resizer_set_input_offset(res, 0);
 969         else
 970                 resizer_set_input_offset(res, ALIGN(informat->width, 0x10) * 2);
 971 
 972         /* YUV422 interleaved, default phase, no luma enhancement */
 973         resizer_set_intype(res, RSZ_YUV422);
 974         resizer_set_ycpos(res, informat->code);
 975         resizer_set_phase(res, DEFAULT_PHASE, DEFAULT_PHASE);
 976         resizer_set_luma(res, &luma);
 977 
 978         /* RESZ_PAD_SOURCE */
 979         resizer_set_output_offset(res, ALIGN(outformat->width * 2, 32));
 980         resizer_set_output_size(res, outformat->width, outformat->height);
 981 
 982         resizer_set_crop_params(res, informat, outformat);
 983 }
 984 
 985 /* -----------------------------------------------------------------------------
 986  * Interrupt handling
 987  */
 988 
 989 static void resizer_enable_oneshot(struct isp_res_device *res)
 990 {
 991         struct isp_device *isp = to_isp_device(res);
 992 
 993         isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_PCR,
 994                     ISPRSZ_PCR_ENABLE | ISPRSZ_PCR_ONESHOT);
 995 }
 996 
 997 void omap3isp_resizer_isr_frame_sync(struct isp_res_device *res)
 998 {
 999         /*
1000          * If ISP_VIDEO_DMAQUEUE_QUEUED is set, DMA queue had an underrun
1001          * condition, the module was paused and now we have a buffer queued
1002          * on the output again. Restart the pipeline if running in continuous
1003          * mode.
1004          */
1005         if (res->state == ISP_PIPELINE_STREAM_CONTINUOUS &&
1006             res->video_out.dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED) {
1007                 resizer_enable_oneshot(res);
1008                 isp_video_dmaqueue_flags_clr(&res->video_out);
1009         }
1010 }
1011 
1012 static void resizer_isr_buffer(struct isp_res_device *res)
1013 {
1014         struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
1015         struct isp_buffer *buffer;
1016         int restart = 0;
1017 
1018         if (res->state == ISP_PIPELINE_STREAM_STOPPED)
1019                 return;
1020 
1021         /* Complete the output buffer and, if reading from memory, the input
1022          * buffer.
1023          */
1024         buffer = omap3isp_video_buffer_next(&res->video_out);
1025         if (buffer != NULL) {
1026                 resizer_set_outaddr(res, buffer->dma);
1027                 restart = 1;
1028         }
1029 
1030         pipe->state |= ISP_PIPELINE_IDLE_OUTPUT;
1031 
1032         if (res->input == RESIZER_INPUT_MEMORY) {
1033                 buffer = omap3isp_video_buffer_next(&res->video_in);
1034                 if (buffer != NULL)
1035                         resizer_set_inaddr(res, buffer->dma);
1036                 pipe->state |= ISP_PIPELINE_IDLE_INPUT;
1037         }
1038 
1039         if (res->state == ISP_PIPELINE_STREAM_SINGLESHOT) {
1040                 if (isp_pipeline_ready(pipe))
1041                         omap3isp_pipeline_set_stream(pipe,
1042                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
1043         } else {
1044                 /* If an underrun occurs, the video queue operation handler will
1045                  * restart the resizer. Otherwise restart it immediately.
1046                  */
1047                 if (restart)
1048                         resizer_enable_oneshot(res);
1049         }
1050 }
1051 
1052 /*
1053  * omap3isp_resizer_isr - ISP resizer interrupt handler
1054  *
1055  * Manage the resizer video buffers and configure shadowed and busy-locked
1056  * registers.
1057  */
1058 void omap3isp_resizer_isr(struct isp_res_device *res)
1059 {
1060         struct v4l2_mbus_framefmt *informat, *outformat;
1061         unsigned long flags;
1062 
1063         if (omap3isp_module_sync_is_stopping(&res->wait, &res->stopping))
1064                 return;
1065 
1066         spin_lock_irqsave(&res->lock, flags);
1067 
1068         if (res->applycrop) {
1069                 outformat = __resizer_get_format(res, NULL, RESZ_PAD_SOURCE,
1070                                               V4L2_SUBDEV_FORMAT_ACTIVE);
1071                 informat = __resizer_get_format(res, NULL, RESZ_PAD_SINK,
1072                                               V4L2_SUBDEV_FORMAT_ACTIVE);
1073                 resizer_set_crop_params(res, informat, outformat);
1074                 res->applycrop = 0;
1075         }
1076 
1077         spin_unlock_irqrestore(&res->lock, flags);
1078 
1079         resizer_isr_buffer(res);
1080 }
1081 
1082 /* -----------------------------------------------------------------------------
1083  * ISP video operations
1084  */
1085 
1086 static int resizer_video_queue(struct isp_video *video,
1087                                struct isp_buffer *buffer)
1088 {
1089         struct isp_res_device *res = &video->isp->isp_res;
1090 
1091         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1092                 resizer_set_inaddr(res, buffer->dma);
1093 
1094         /*
1095          * We now have a buffer queued on the output. Despite what the
1096          * TRM says, the resizer can't be restarted immediately.
1097          * Enabling it in one shot mode in the middle of a frame (or at
1098          * least asynchronously to the frame) results in the output
1099          * being shifted randomly left/right and up/down, as if the
1100          * hardware didn't synchronize itself to the beginning of the
1101          * frame correctly.
1102          *
1103          * Restart the resizer on the next sync interrupt if running in
1104          * continuous mode or when starting the stream.
1105          */
1106         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1107                 resizer_set_outaddr(res, buffer->dma);
1108 
1109         return 0;
1110 }
1111 
1112 static const struct isp_video_operations resizer_video_ops = {
1113         .queue = resizer_video_queue,
1114 };
1115 
1116 /* -----------------------------------------------------------------------------
1117  * V4L2 subdev operations
1118  */
1119 
1120 /*
1121  * resizer_set_stream - Enable/Disable streaming on resizer subdev
1122  * @sd: ISP resizer V4L2 subdev
1123  * @enable: 1 == Enable, 0 == Disable
1124  *
1125  * The resizer hardware can't be enabled without a memory buffer to write to.
1126  * As the s_stream operation is called in response to a STREAMON call without
1127  * any buffer queued yet, just update the state field and return immediately.
1128  * The resizer will be enabled in resizer_video_queue().
1129  */
1130 static int resizer_set_stream(struct v4l2_subdev *sd, int enable)
1131 {
1132         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1133         struct isp_video *video_out = &res->video_out;
1134         struct isp_device *isp = to_isp_device(res);
1135         struct device *dev = to_device(res);
1136 
1137         if (res->state == ISP_PIPELINE_STREAM_STOPPED) {
1138                 if (enable == ISP_PIPELINE_STREAM_STOPPED)
1139                         return 0;
1140 
1141                 omap3isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_RESIZER);
1142                 resizer_configure(res);
1143                 resizer_print_status(res);
1144         }
1145 
1146         switch (enable) {
1147         case ISP_PIPELINE_STREAM_CONTINUOUS:
1148                 omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_WRITE);
1149                 if (video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED) {
1150                         resizer_enable_oneshot(res);
1151                         isp_video_dmaqueue_flags_clr(video_out);
1152                 }
1153                 break;
1154 
1155         case ISP_PIPELINE_STREAM_SINGLESHOT:
1156                 if (res->input == RESIZER_INPUT_MEMORY)
1157                         omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_READ);
1158                 omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_WRITE);
1159 
1160                 resizer_enable_oneshot(res);
1161                 break;
1162 
1163         case ISP_PIPELINE_STREAM_STOPPED:
1164                 if (omap3isp_module_sync_idle(&sd->entity, &res->wait,
1165                                               &res->stopping))
1166                         dev_dbg(dev, "%s: module stop timeout.\n", sd->name);
1167                 omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_RESIZER_READ |
1168                                 OMAP3_ISP_SBL_RESIZER_WRITE);
1169                 omap3isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_RESIZER);
1170                 isp_video_dmaqueue_flags_clr(video_out);
1171                 break;
1172         }
1173 
1174         res->state = enable;
1175         return 0;
1176 }
1177 
1178 /*
1179  * resizer_try_crop - mangles crop parameters.
1180  */
1181 static void resizer_try_crop(const struct v4l2_mbus_framefmt *sink,
1182                              const struct v4l2_mbus_framefmt *source,
1183                              struct v4l2_rect *crop)
1184 {
1185         const unsigned int spv = DEFAULT_PHASE;
1186         const unsigned int sph = DEFAULT_PHASE;
1187 
1188         /* Crop rectangle is constrained by the output size so that zoom ratio
1189          * cannot exceed +/-4.0.
1190          */
1191         unsigned int min_width =
1192                 ((32 * sph + (source->width - 1) * 64 + 16) >> 8) + 7;
1193         unsigned int min_height =
1194                 ((32 * spv + (source->height - 1) * 64 + 16) >> 8) + 4;
1195         unsigned int max_width =
1196                 ((64 * sph + (source->width - 1) * 1024 + 32) >> 8) + 7;
1197         unsigned int max_height =
1198                 ((64 * spv + (source->height - 1) * 1024 + 32) >> 8) + 7;
1199 
1200         crop->width = clamp_t(u32, crop->width, min_width, max_width);
1201         crop->height = clamp_t(u32, crop->height, min_height, max_height);
1202 
1203         /* Crop can not go beyond of the input rectangle */
1204         crop->left = clamp_t(u32, crop->left, 0, sink->width - MIN_IN_WIDTH);
1205         crop->width = clamp_t(u32, crop->width, MIN_IN_WIDTH,
1206                               sink->width - crop->left);
1207         crop->top = clamp_t(u32, crop->top, 0, sink->height - MIN_IN_HEIGHT);
1208         crop->height = clamp_t(u32, crop->height, MIN_IN_HEIGHT,
1209                                sink->height - crop->top);
1210 }
1211 
1212 /*
1213  * resizer_get_selection - Retrieve a selection rectangle on a pad
1214  * @sd: ISP resizer V4L2 subdevice
1215  * @cfg: V4L2 subdev pad configuration
1216  * @sel: Selection rectangle
1217  *
1218  * The only supported rectangles are the crop rectangles on the sink pad.
1219  *
1220  * Return 0 on success or a negative error code otherwise.
1221  */
1222 static int resizer_get_selection(struct v4l2_subdev *sd,
1223                                  struct v4l2_subdev_pad_config *cfg,
1224                                  struct v4l2_subdev_selection *sel)
1225 {
1226         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1227         struct v4l2_mbus_framefmt *format_source;
1228         struct v4l2_mbus_framefmt *format_sink;
1229         struct resizer_ratio ratio;
1230 
1231         if (sel->pad != RESZ_PAD_SINK)
1232                 return -EINVAL;
1233 
1234         format_sink = __resizer_get_format(res, cfg, RESZ_PAD_SINK,
1235                                            sel->which);
1236         format_source = __resizer_get_format(res, cfg, RESZ_PAD_SOURCE,
1237                                              sel->which);
1238 
1239         switch (sel->target) {
1240         case V4L2_SEL_TGT_CROP_BOUNDS:
1241                 sel->r.left = 0;
1242                 sel->r.top = 0;
1243                 sel->r.width = INT_MAX;
1244                 sel->r.height = INT_MAX;
1245 
1246                 resizer_try_crop(format_sink, format_source, &sel->r);
1247                 resizer_calc_ratios(res, &sel->r, format_source, &ratio);
1248                 break;
1249 
1250         case V4L2_SEL_TGT_CROP:
1251                 sel->r = *__resizer_get_crop(res, cfg, sel->which);
1252                 resizer_calc_ratios(res, &sel->r, format_source, &ratio);
1253                 break;
1254 
1255         default:
1256                 return -EINVAL;
1257         }
1258 
1259         return 0;
1260 }
1261 
1262 /*
1263  * resizer_set_selection - Set a selection rectangle on a pad
1264  * @sd: ISP resizer V4L2 subdevice
1265  * @cfg: V4L2 subdev pad configuration
1266  * @sel: Selection rectangle
1267  *
1268  * The only supported rectangle is the actual crop rectangle on the sink pad.
1269  *
1270  * FIXME: This function currently behaves as if the KEEP_CONFIG selection flag
1271  * was always set.
1272  *
1273  * Return 0 on success or a negative error code otherwise.
1274  */
1275 static int resizer_set_selection(struct v4l2_subdev *sd,
1276                                  struct v4l2_subdev_pad_config *cfg,
1277                                  struct v4l2_subdev_selection *sel)
1278 {
1279         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1280         struct isp_device *isp = to_isp_device(res);
1281         const struct v4l2_mbus_framefmt *format_sink;
1282         struct v4l2_mbus_framefmt format_source;
1283         struct resizer_ratio ratio;
1284         unsigned long flags;
1285 
1286         if (sel->target != V4L2_SEL_TGT_CROP ||
1287             sel->pad != RESZ_PAD_SINK)
1288                 return -EINVAL;
1289 
1290         format_sink = __resizer_get_format(res, cfg, RESZ_PAD_SINK,
1291                                            sel->which);
1292         format_source = *__resizer_get_format(res, cfg, RESZ_PAD_SOURCE,
1293                                               sel->which);
1294 
1295         dev_dbg(isp->dev, "%s(%s): req %ux%u -> (%d,%d)/%ux%u -> %ux%u\n",
1296                 __func__, sel->which == V4L2_SUBDEV_FORMAT_TRY ? "try" : "act",
1297                 format_sink->width, format_sink->height,
1298                 sel->r.left, sel->r.top, sel->r.width, sel->r.height,
1299                 format_source.width, format_source.height);
1300 
1301         /* Clamp the crop rectangle to the bounds, and then mangle it further to
1302          * fulfill the TRM equations. Store the clamped but otherwise unmangled
1303          * rectangle to avoid cropping the input multiple times: when an
1304          * application sets the output format, the current crop rectangle is
1305          * mangled during crop rectangle computation, which would lead to a new,
1306          * smaller input crop rectangle every time the output size is set if we
1307          * stored the mangled rectangle.
1308          */
1309         resizer_try_crop(format_sink, &format_source, &sel->r);
1310         *__resizer_get_crop(res, cfg, sel->which) = sel->r;
1311         resizer_calc_ratios(res, &sel->r, &format_source, &ratio);
1312 
1313         dev_dbg(isp->dev, "%s(%s): got %ux%u -> (%d,%d)/%ux%u -> %ux%u\n",
1314                 __func__, sel->which == V4L2_SUBDEV_FORMAT_TRY ? "try" : "act",
1315                 format_sink->width, format_sink->height,
1316                 sel->r.left, sel->r.top, sel->r.width, sel->r.height,
1317                 format_source.width, format_source.height);
1318 
1319         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1320                 *__resizer_get_format(res, cfg, RESZ_PAD_SOURCE, sel->which) =
1321                         format_source;
1322                 return 0;
1323         }
1324 
1325         /* Update the source format, resizing ratios and crop rectangle. If
1326          * streaming is on the IRQ handler will reprogram the resizer after the
1327          * current frame. We thus we need to protect against race conditions.
1328          */
1329         spin_lock_irqsave(&res->lock, flags);
1330 
1331         *__resizer_get_format(res, cfg, RESZ_PAD_SOURCE, sel->which) =
1332                 format_source;
1333 
1334         res->ratio = ratio;
1335         res->crop.active = sel->r;
1336 
1337         if (res->state != ISP_PIPELINE_STREAM_STOPPED)
1338                 res->applycrop = 1;
1339 
1340         spin_unlock_irqrestore(&res->lock, flags);
1341 
1342         return 0;
1343 }
1344 
1345 /* resizer pixel formats */
1346 static const unsigned int resizer_formats[] = {
1347         MEDIA_BUS_FMT_UYVY8_1X16,
1348         MEDIA_BUS_FMT_YUYV8_1X16,
1349 };
1350 
1351 static unsigned int resizer_max_in_width(struct isp_res_device *res)
1352 {
1353         struct isp_device *isp = to_isp_device(res);
1354 
1355         if (res->input == RESIZER_INPUT_MEMORY) {
1356                 return MAX_IN_WIDTH_MEMORY_MODE;
1357         } else {
1358                 if (isp->revision == ISP_REVISION_1_0)
1359                         return MAX_IN_WIDTH_ONTHEFLY_MODE_ES1;
1360                 else
1361                         return MAX_IN_WIDTH_ONTHEFLY_MODE_ES2;
1362         }
1363 }
1364 
1365 /*
1366  * resizer_try_format - Handle try format by pad subdev method
1367  * @res   : ISP resizer device
1368  * @cfg: V4L2 subdev pad configuration
1369  * @pad   : pad num
1370  * @fmt   : pointer to v4l2 format structure
1371  * @which : wanted subdev format
1372  */
1373 static void resizer_try_format(struct isp_res_device *res,
1374                                struct v4l2_subdev_pad_config *cfg, unsigned int pad,
1375                                struct v4l2_mbus_framefmt *fmt,
1376                                enum v4l2_subdev_format_whence which)
1377 {
1378         struct v4l2_mbus_framefmt *format;
1379         struct resizer_ratio ratio;
1380         struct v4l2_rect crop;
1381 
1382         switch (pad) {
1383         case RESZ_PAD_SINK:
1384                 if (fmt->code != MEDIA_BUS_FMT_YUYV8_1X16 &&
1385                     fmt->code != MEDIA_BUS_FMT_UYVY8_1X16)
1386                         fmt->code = MEDIA_BUS_FMT_YUYV8_1X16;
1387 
1388                 fmt->width = clamp_t(u32, fmt->width, MIN_IN_WIDTH,
1389                                      resizer_max_in_width(res));
1390                 fmt->height = clamp_t(u32, fmt->height, MIN_IN_HEIGHT,
1391                                       MAX_IN_HEIGHT);
1392                 break;
1393 
1394         case RESZ_PAD_SOURCE:
1395                 format = __resizer_get_format(res, cfg, RESZ_PAD_SINK, which);
1396                 fmt->code = format->code;
1397 
1398                 crop = *__resizer_get_crop(res, cfg, which);
1399                 resizer_calc_ratios(res, &crop, fmt, &ratio);
1400                 break;
1401         }
1402 
1403         fmt->colorspace = V4L2_COLORSPACE_JPEG;
1404         fmt->field = V4L2_FIELD_NONE;
1405 }
1406 
1407 /*
1408  * resizer_enum_mbus_code - Handle pixel format enumeration
1409  * @sd     : pointer to v4l2 subdev structure
1410  * @cfg: V4L2 subdev pad configuration
1411  * @code   : pointer to v4l2_subdev_mbus_code_enum structure
1412  * return -EINVAL or zero on success
1413  */
1414 static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
1415                                   struct v4l2_subdev_pad_config *cfg,
1416                                   struct v4l2_subdev_mbus_code_enum *code)
1417 {
1418         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1419         struct v4l2_mbus_framefmt *format;
1420 
1421         if (code->pad == RESZ_PAD_SINK) {
1422                 if (code->index >= ARRAY_SIZE(resizer_formats))
1423                         return -EINVAL;
1424 
1425                 code->code = resizer_formats[code->index];
1426         } else {
1427                 if (code->index != 0)
1428                         return -EINVAL;
1429 
1430                 format = __resizer_get_format(res, cfg, RESZ_PAD_SINK,
1431                                               code->which);
1432                 code->code = format->code;
1433         }
1434 
1435         return 0;
1436 }
1437 
1438 static int resizer_enum_frame_size(struct v4l2_subdev *sd,
1439                                    struct v4l2_subdev_pad_config *cfg,
1440                                    struct v4l2_subdev_frame_size_enum *fse)
1441 {
1442         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1443         struct v4l2_mbus_framefmt format;
1444 
1445         if (fse->index != 0)
1446                 return -EINVAL;
1447 
1448         format.code = fse->code;
1449         format.width = 1;
1450         format.height = 1;
1451         resizer_try_format(res, cfg, fse->pad, &format, fse->which);
1452         fse->min_width = format.width;
1453         fse->min_height = format.height;
1454 
1455         if (format.code != fse->code)
1456                 return -EINVAL;
1457 
1458         format.code = fse->code;
1459         format.width = -1;
1460         format.height = -1;
1461         resizer_try_format(res, cfg, fse->pad, &format, fse->which);
1462         fse->max_width = format.width;
1463         fse->max_height = format.height;
1464 
1465         return 0;
1466 }
1467 
1468 /*
1469  * resizer_get_format - Handle get format by pads subdev method
1470  * @sd    : pointer to v4l2 subdev structure
1471  * @cfg: V4L2 subdev pad configuration
1472  * @fmt   : pointer to v4l2 subdev format structure
1473  * return -EINVAL or zero on success
1474  */
1475 static int resizer_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
1476                               struct v4l2_subdev_format *fmt)
1477 {
1478         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1479         struct v4l2_mbus_framefmt *format;
1480 
1481         format = __resizer_get_format(res, cfg, fmt->pad, fmt->which);
1482         if (format == NULL)
1483                 return -EINVAL;
1484 
1485         fmt->format = *format;
1486         return 0;
1487 }
1488 
1489 /*
1490  * resizer_set_format - Handle set format by pads subdev method
1491  * @sd    : pointer to v4l2 subdev structure
1492  * @cfg: V4L2 subdev pad configuration
1493  * @fmt   : pointer to v4l2 subdev format structure
1494  * return -EINVAL or zero on success
1495  */
1496 static int resizer_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
1497                               struct v4l2_subdev_format *fmt)
1498 {
1499         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1500         struct v4l2_mbus_framefmt *format;
1501         struct v4l2_rect *crop;
1502 
1503         format = __resizer_get_format(res, cfg, fmt->pad, fmt->which);
1504         if (format == NULL)
1505                 return -EINVAL;
1506 
1507         resizer_try_format(res, cfg, fmt->pad, &fmt->format, fmt->which);
1508         *format = fmt->format;
1509 
1510         if (fmt->pad == RESZ_PAD_SINK) {
1511                 /* reset crop rectangle */
1512                 crop = __resizer_get_crop(res, cfg, fmt->which);
1513                 crop->left = 0;
1514                 crop->top = 0;
1515                 crop->width = fmt->format.width;
1516                 crop->height = fmt->format.height;
1517 
1518                 /* Propagate the format from sink to source */
1519                 format = __resizer_get_format(res, cfg, RESZ_PAD_SOURCE,
1520                                               fmt->which);
1521                 *format = fmt->format;
1522                 resizer_try_format(res, cfg, RESZ_PAD_SOURCE, format,
1523                                    fmt->which);
1524         }
1525 
1526         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1527                 /* Compute and store the active crop rectangle and resizer
1528                  * ratios. format already points to the source pad active
1529                  * format.
1530                  */
1531                 res->crop.active = res->crop.request;
1532                 resizer_calc_ratios(res, &res->crop.active, format,
1533                                        &res->ratio);
1534         }
1535 
1536         return 0;
1537 }
1538 
1539 static int resizer_link_validate(struct v4l2_subdev *sd,
1540                                  struct media_link *link,
1541                                  struct v4l2_subdev_format *source_fmt,
1542                                  struct v4l2_subdev_format *sink_fmt)
1543 {
1544         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1545         struct isp_pipeline *pipe = to_isp_pipeline(&sd->entity);
1546 
1547         omap3isp_resizer_max_rate(res, &pipe->max_rate);
1548 
1549         return v4l2_subdev_link_validate_default(sd, link,
1550                                                  source_fmt, sink_fmt);
1551 }
1552 
1553 /*
1554  * resizer_init_formats - Initialize formats on all pads
1555  * @sd: ISP resizer V4L2 subdevice
1556  * @fh: V4L2 subdev file handle
1557  *
1558  * Initialize all pad formats with default values. If fh is not NULL, try
1559  * formats are initialized on the file handle. Otherwise active formats are
1560  * initialized on the device.
1561  */
1562 static int resizer_init_formats(struct v4l2_subdev *sd,
1563                                 struct v4l2_subdev_fh *fh)
1564 {
1565         struct v4l2_subdev_format format;
1566 
1567         memset(&format, 0, sizeof(format));
1568         format.pad = RESZ_PAD_SINK;
1569         format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
1570         format.format.code = MEDIA_BUS_FMT_YUYV8_1X16;
1571         format.format.width = 4096;
1572         format.format.height = 4096;
1573         resizer_set_format(sd, fh ? fh->pad : NULL, &format);
1574 
1575         return 0;
1576 }
1577 
1578 /* subdev video operations */
1579 static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = {
1580         .s_stream = resizer_set_stream,
1581 };
1582 
1583 /* subdev pad operations */
1584 static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = {
1585         .enum_mbus_code = resizer_enum_mbus_code,
1586         .enum_frame_size = resizer_enum_frame_size,
1587         .get_fmt = resizer_get_format,
1588         .set_fmt = resizer_set_format,
1589         .get_selection = resizer_get_selection,
1590         .set_selection = resizer_set_selection,
1591         .link_validate = resizer_link_validate,
1592 };
1593 
1594 /* subdev operations */
1595 static const struct v4l2_subdev_ops resizer_v4l2_ops = {
1596         .video = &resizer_v4l2_video_ops,
1597         .pad = &resizer_v4l2_pad_ops,
1598 };
1599 
1600 /* subdev internal operations */
1601 static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = {
1602         .open = resizer_init_formats,
1603 };
1604 
1605 /* -----------------------------------------------------------------------------
1606  * Media entity operations
1607  */
1608 
1609 /*
1610  * resizer_link_setup - Setup resizer connections.
1611  * @entity : Pointer to media entity structure
1612  * @local  : Pointer to local pad array
1613  * @remote : Pointer to remote pad array
1614  * @flags  : Link flags
1615  * return -EINVAL or zero on success
1616  */
1617 static int resizer_link_setup(struct media_entity *entity,
1618                               const struct media_pad *local,
1619                               const struct media_pad *remote, u32 flags)
1620 {
1621         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1622         struct isp_res_device *res = v4l2_get_subdevdata(sd);
1623         unsigned int index = local->index;
1624 
1625         /* FIXME: this is actually a hack! */
1626         if (is_media_entity_v4l2_subdev(remote->entity))
1627                 index |= 2 << 16;
1628 
1629         switch (index) {
1630         case RESZ_PAD_SINK:
1631                 /* read from memory */
1632                 if (flags & MEDIA_LNK_FL_ENABLED) {
1633                         if (res->input == RESIZER_INPUT_VP)
1634                                 return -EBUSY;
1635                         res->input = RESIZER_INPUT_MEMORY;
1636                 } else {
1637                         if (res->input == RESIZER_INPUT_MEMORY)
1638                                 res->input = RESIZER_INPUT_NONE;
1639                 }
1640                 break;
1641 
1642         case RESZ_PAD_SINK | 2 << 16:
1643                 /* read from ccdc or previewer */
1644                 if (flags & MEDIA_LNK_FL_ENABLED) {
1645                         if (res->input == RESIZER_INPUT_MEMORY)
1646                                 return -EBUSY;
1647                         res->input = RESIZER_INPUT_VP;
1648                 } else {
1649                         if (res->input == RESIZER_INPUT_VP)
1650                                 res->input = RESIZER_INPUT_NONE;
1651                 }
1652                 break;
1653 
1654         case RESZ_PAD_SOURCE:
1655                 /* resizer always write to memory */
1656                 break;
1657 
1658         default:
1659                 return -EINVAL;
1660         }
1661 
1662         return 0;
1663 }
1664 
1665 /* media operations */
1666 static const struct media_entity_operations resizer_media_ops = {
1667         .link_setup = resizer_link_setup,
1668         .link_validate = v4l2_subdev_link_validate,
1669 };
1670 
1671 void omap3isp_resizer_unregister_entities(struct isp_res_device *res)
1672 {
1673         v4l2_device_unregister_subdev(&res->subdev);
1674         omap3isp_video_unregister(&res->video_in);
1675         omap3isp_video_unregister(&res->video_out);
1676 }
1677 
1678 int omap3isp_resizer_register_entities(struct isp_res_device *res,
1679                                        struct v4l2_device *vdev)
1680 {
1681         int ret;
1682 
1683         /* Register the subdev and video nodes. */
1684         res->subdev.dev = vdev->mdev->dev;
1685         ret = v4l2_device_register_subdev(vdev, &res->subdev);
1686         if (ret < 0)
1687                 goto error;
1688 
1689         ret = omap3isp_video_register(&res->video_in, vdev);
1690         if (ret < 0)
1691                 goto error;
1692 
1693         ret = omap3isp_video_register(&res->video_out, vdev);
1694         if (ret < 0)
1695                 goto error;
1696 
1697         return 0;
1698 
1699 error:
1700         omap3isp_resizer_unregister_entities(res);
1701         return ret;
1702 }
1703 
1704 /* -----------------------------------------------------------------------------
1705  * ISP resizer initialization and cleanup
1706  */
1707 
1708 /*
1709  * resizer_init_entities - Initialize resizer subdev and media entity.
1710  * @res : Pointer to resizer device structure
1711  * return -ENOMEM or zero on success
1712  */
1713 static int resizer_init_entities(struct isp_res_device *res)
1714 {
1715         struct v4l2_subdev *sd = &res->subdev;
1716         struct media_pad *pads = res->pads;
1717         struct media_entity *me = &sd->entity;
1718         int ret;
1719 
1720         res->input = RESIZER_INPUT_NONE;
1721 
1722         v4l2_subdev_init(sd, &resizer_v4l2_ops);
1723         sd->internal_ops = &resizer_v4l2_internal_ops;
1724         strscpy(sd->name, "OMAP3 ISP resizer", sizeof(sd->name));
1725         sd->grp_id = 1 << 16;   /* group ID for isp subdevs */
1726         v4l2_set_subdevdata(sd, res);
1727         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1728 
1729         pads[RESZ_PAD_SINK].flags = MEDIA_PAD_FL_SINK
1730                                     | MEDIA_PAD_FL_MUST_CONNECT;
1731         pads[RESZ_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
1732 
1733         me->ops = &resizer_media_ops;
1734         ret = media_entity_pads_init(me, RESZ_PADS_NUM, pads);
1735         if (ret < 0)
1736                 return ret;
1737 
1738         resizer_init_formats(sd, NULL);
1739 
1740         res->video_in.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1741         res->video_in.ops = &resizer_video_ops;
1742         res->video_in.isp = to_isp_device(res);
1743         res->video_in.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
1744         res->video_in.bpl_alignment = 32;
1745         res->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1746         res->video_out.ops = &resizer_video_ops;
1747         res->video_out.isp = to_isp_device(res);
1748         res->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
1749         res->video_out.bpl_alignment = 32;
1750 
1751         ret = omap3isp_video_init(&res->video_in, "resizer");
1752         if (ret < 0)
1753                 goto error_video_in;
1754 
1755         ret = omap3isp_video_init(&res->video_out, "resizer");
1756         if (ret < 0)
1757                 goto error_video_out;
1758 
1759         res->video_out.video.entity.flags |= MEDIA_ENT_FL_DEFAULT;
1760 
1761         return 0;
1762 
1763 error_video_out:
1764         omap3isp_video_cleanup(&res->video_in);
1765 error_video_in:
1766         media_entity_cleanup(&res->subdev.entity);
1767         return ret;
1768 }
1769 
1770 /*
1771  * isp_resizer_init - Resizer initialization.
1772  * @isp : Pointer to ISP device
1773  * return -ENOMEM or zero on success
1774  */
1775 int omap3isp_resizer_init(struct isp_device *isp)
1776 {
1777         struct isp_res_device *res = &isp->isp_res;
1778 
1779         init_waitqueue_head(&res->wait);
1780         atomic_set(&res->stopping, 0);
1781         spin_lock_init(&res->lock);
1782 
1783         return resizer_init_entities(res);
1784 }
1785 
1786 void omap3isp_resizer_cleanup(struct isp_device *isp)
1787 {
1788         struct isp_res_device *res = &isp->isp_res;
1789 
1790         omap3isp_video_cleanup(&res->video_in);
1791         omap3isp_video_cleanup(&res->video_out);
1792         media_entity_cleanup(&res->subdev.entity);
1793 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/platform/omap3isp/ispresizer.c

DEFINITIONS
