kernel/drivers/media/platform/omap3isp/isppreview.c

   1 /*
   2  * isppreview.c
   3  *
   4  * TI OMAP3 ISP driver - Preview module
   5  *
   6  * Copyright (C) 2010 Nokia Corporation
   7  * Copyright (C) 2009 Texas Instruments, Inc.
   8  *
   9  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  10  *           Sakari Ailus <sakari.ailus@iki.fi>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/device.h>
  18 #include <linux/mm.h>
  19 #include <linux/module.h>
  20 #include <linux/mutex.h>
  21 #include <linux/uaccess.h>
  22
  23 #include "isp.h"
  24 #include "ispreg.h"
  25 #include "isppreview.h"
  26
  27 /* Default values in Office Fluorescent Light for RGBtoRGB Blending */
  28 static struct omap3isp_prev_rgbtorgb flr_rgb2rgb = {
  29         {       /* RGB-RGB Matrix */
  30                 {0x01E2, 0x0F30, 0x0FEE},
  31                 {0x0F9B, 0x01AC, 0x0FB9},
  32                 {0x0FE0, 0x0EC0, 0x0260}
  33         },      /* RGB Offset */
  34         {0x0000, 0x0000, 0x0000}
  35 };
  36
  37 /* Default values in Office Fluorescent Light for RGB to YUV Conversion*/
  38 static struct omap3isp_prev_csc flr_prev_csc = {
  39         {       /* CSC Coef Matrix */
  40                 {66, 129, 25},
  41                 {-38, -75, 112},
  42                 {112, -94 , -18}
  43         },      /* CSC Offset */
  44         {0x0, 0x0, 0x0}
  45 };
  46
  47 /* Default values in Office Fluorescent Light for CFA Gradient*/
  48 #define FLR_CFA_GRADTHRS_HORZ   0x28
  49 #define FLR_CFA_GRADTHRS_VERT   0x28
  50
  51 /* Default values in Office Fluorescent Light for Chroma Suppression*/
  52 #define FLR_CSUP_GAIN           0x0D
  53 #define FLR_CSUP_THRES          0xEB
  54
  55 /* Default values in Office Fluorescent Light for Noise Filter*/
  56 #define FLR_NF_STRGTH           0x03
  57
  58 /* Default values for White Balance */
  59 #define FLR_WBAL_DGAIN          0x100
  60 #define FLR_WBAL_COEF           0x20
  61
  62 /* Default values in Office Fluorescent Light for Black Adjustment*/
  63 #define FLR_BLKADJ_BLUE         0x0
  64 #define FLR_BLKADJ_GREEN        0x0
  65 #define FLR_BLKADJ_RED          0x0
  66
  67 #define DEF_DETECT_CORRECT_VAL  0xe
  68
  69 /*
  70  * Margins and image size limits.
  71  *
  72  * The preview engine crops several rows and columns internally depending on
  73  * which filters are enabled. To avoid format changes when the filters are
  74  * enabled or disabled (which would prevent them from being turned on or off
  75  * during streaming), the driver assumes all filters that can be configured
  76  * during streaming are enabled when computing sink crop and source format
  77  * limits.
  78  *
  79  * If a filter is disabled, additional cropping is automatically added at the
  80  * preview engine input by the driver to avoid overflow at line and frame end.
  81  * This is completely transparent for applications.
  82  *
  83  * Median filter                4 pixels
  84  * Noise filter,
  85  * Faulty pixels correction     4 pixels, 4 lines
  86  * Color suppression            2 pixels
  87  * or luma enhancement
  88  * -------------------------------------------------------------
  89  * Maximum total                10 pixels, 4 lines
  90  *
  91  * The color suppression and luma enhancement filters are applied after bayer to
  92  * YUV conversion. They thus can crop one pixel on the left and one pixel on the
  93  * right side of the image without changing the color pattern. When both those
  94  * filters are disabled, the driver must crop the two pixels on the same side of
  95  * the image to avoid changing the bayer pattern. The left margin is thus set to
  96  * 6 pixels and the right margin to 4 pixels.
  97  */
  98
  99 #define PREV_MARGIN_LEFT        6
 100 #define PREV_MARGIN_RIGHT       4
 101 #define PREV_MARGIN_TOP         2
 102 #define PREV_MARGIN_BOTTOM      2
 103
 104 #define PREV_MIN_IN_WIDTH       64
 105 #define PREV_MIN_IN_HEIGHT      8
 106 #define PREV_MAX_IN_HEIGHT      16384
 107
 108 #define PREV_MIN_OUT_WIDTH              0
 109 #define PREV_MIN_OUT_HEIGHT             0
 110 #define PREV_MAX_OUT_WIDTH_REV_1        1280
 111 #define PREV_MAX_OUT_WIDTH_REV_2        3300
 112 #define PREV_MAX_OUT_WIDTH_REV_15       4096
 113
 114 /*
 115  * Coefficient Tables for the submodules in Preview.
 116  * Array is initialised with the values from.the tables text file.
 117  */
 118
 119 /*
 120  * CFA Filter Coefficient Table
 121  *
 122  */
 123 static u32 cfa_coef_table[4][OMAP3ISP_PREV_CFA_BLK_SIZE] = {
 124 #include "cfa_coef_table.h"
 125 };
 126
 127 /*
 128  * Default Gamma Correction Table - All components
 129  */
 130 static u32 gamma_table[] = {
 131 #include "gamma_table.h"
 132 };
 133
 134 /*
 135  * Noise Filter Threshold table
 136  */
 137 static u32 noise_filter_table[] = {
 138 #include "noise_filter_table.h"
 139 };
 140
 141 /*
 142  * Luminance Enhancement Table
 143  */
 144 static u32 luma_enhance_table[] = {
 145 #include "luma_enhance_table.h"
 146 };
 147
 148 /*
 149  * preview_config_luma_enhancement - Configure the Luminance Enhancement table
 150  */
 151 static void
 152 preview_config_luma_enhancement(struct isp_prev_device *prev,
 153                                 const struct prev_params *params)
 154 {
 155         struct isp_device *isp = to_isp_device(prev);
 156         const struct omap3isp_prev_luma *yt = &params->luma;
 157         unsigned int i;
 158
 159         isp_reg_writel(isp, ISPPRV_YENH_TABLE_ADDR,
 160                        OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_ADDR);
 161         for (i = 0; i < OMAP3ISP_PREV_YENH_TBL_SIZE; i++) {
 162                 isp_reg_writel(isp, yt->table[i],
 163                                OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_DATA);
 164         }
 165 }
 166
 167 /*
 168  * preview_enable_luma_enhancement - Enable/disable Luminance Enhancement
 169  */
 170 static void
 171 preview_enable_luma_enhancement(struct isp_prev_device *prev, bool enable)
 172 {
 173         struct isp_device *isp = to_isp_device(prev);
 174
 175         if (enable)
 176                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 177                             ISPPRV_PCR_YNENHEN);
 178         else
 179                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 180                             ISPPRV_PCR_YNENHEN);
 181 }
 182
 183 /*
 184  * preview_enable_invalaw - Enable/disable Inverse A-Law decompression
 185  */
 186 static void preview_enable_invalaw(struct isp_prev_device *prev, bool enable)
 187 {
 188         struct isp_device *isp = to_isp_device(prev);
 189
 190         if (enable)
 191                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 192                             ISPPRV_PCR_INVALAW);
 193         else
 194                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 195                             ISPPRV_PCR_INVALAW);
 196 }
 197
 198 /*
 199  * preview_config_hmed - Configure the Horizontal Median Filter
 200  */
 201 static void preview_config_hmed(struct isp_prev_device *prev,
 202                                 const struct prev_params *params)
 203 {
 204         struct isp_device *isp = to_isp_device(prev);
 205         const struct omap3isp_prev_hmed *hmed = &params->hmed;
 206
 207         isp_reg_writel(isp, (hmed->odddist == 1 ? 0 : ISPPRV_HMED_ODDDIST) |
 208                        (hmed->evendist == 1 ? 0 : ISPPRV_HMED_EVENDIST) |
 209                        (hmed->thres << ISPPRV_HMED_THRESHOLD_SHIFT),
 210                        OMAP3_ISP_IOMEM_PREV, ISPPRV_HMED);
 211 }
 212
 213 /*
 214  * preview_enable_hmed - Enable/disable the Horizontal Median Filter
 215  */
 216 static void preview_enable_hmed(struct isp_prev_device *prev, bool enable)
 217 {
 218         struct isp_device *isp = to_isp_device(prev);
 219
 220         if (enable)
 221                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 222                             ISPPRV_PCR_HMEDEN);
 223         else
 224                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 225                             ISPPRV_PCR_HMEDEN);
 226 }
 227
 228 /*
 229  * preview_config_cfa - Configure CFA Interpolation for Bayer formats
 230  *
 231  * The CFA table is organised in four blocks, one per Bayer component. The
 232  * hardware expects blocks to follow the Bayer order of the input data, while
 233  * the driver stores the table in GRBG order in memory. The blocks need to be
 234  * reordered to support non-GRBG Bayer patterns.
 235  */
 236 static void preview_config_cfa(struct isp_prev_device *prev,
 237                                const struct prev_params *params)
 238 {
 239         static const unsigned int cfa_coef_order[4][4] = {
 240                 { 0, 1, 2, 3 }, /* GRBG */
 241                 { 1, 0, 3, 2 }, /* RGGB */
 242                 { 2, 3, 0, 1 }, /* BGGR */
 243                 { 3, 2, 1, 0 }, /* GBRG */
 244         };
 245         const unsigned int *order = cfa_coef_order[prev->params.cfa_order];
 246         const struct omap3isp_prev_cfa *cfa = &params->cfa;
 247         struct isp_device *isp = to_isp_device(prev);
 248         unsigned int i;
 249         unsigned int j;
 250
 251         isp_reg_writel(isp,
 252                 (cfa->gradthrs_vert << ISPPRV_CFA_GRADTH_VER_SHIFT) |
 253                 (cfa->gradthrs_horz << ISPPRV_CFA_GRADTH_HOR_SHIFT),
 254                 OMAP3_ISP_IOMEM_PREV, ISPPRV_CFA);
 255
 256         isp_reg_writel(isp, ISPPRV_CFA_TABLE_ADDR,
 257                        OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_ADDR);
 258
 259         for (i = 0; i < 4; ++i) {
 260                 const __u32 *block = cfa->table[order[i]];
 261
 262                 for (j = 0; j < OMAP3ISP_PREV_CFA_BLK_SIZE; ++j)
 263                         isp_reg_writel(isp, block[j], OMAP3_ISP_IOMEM_PREV,
 264                                        ISPPRV_SET_TBL_DATA);
 265         }
 266 }
 267
 268 /*
 269  * preview_config_chroma_suppression - Configure Chroma Suppression
 270  */
 271 static void
 272 preview_config_chroma_suppression(struct isp_prev_device *prev,
 273                                   const struct prev_params *params)
 274 {
 275         struct isp_device *isp = to_isp_device(prev);
 276         const struct omap3isp_prev_csup *cs = &params->csup;
 277
 278         isp_reg_writel(isp,
 279                        cs->gain | (cs->thres << ISPPRV_CSUP_THRES_SHIFT) |
 280                        (cs->hypf_en << ISPPRV_CSUP_HPYF_SHIFT),
 281                        OMAP3_ISP_IOMEM_PREV, ISPPRV_CSUP);
 282 }
 283
 284 /*
 285  * preview_enable_chroma_suppression - Enable/disable Chrominance Suppression
 286  */
 287 static void
 288 preview_enable_chroma_suppression(struct isp_prev_device *prev, bool enable)
 289 {
 290         struct isp_device *isp = to_isp_device(prev);
 291
 292         if (enable)
 293                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 294                             ISPPRV_PCR_SUPEN);
 295         else
 296                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 297                             ISPPRV_PCR_SUPEN);
 298 }
 299
 300 /*
 301  * preview_config_whitebalance - Configure White Balance parameters
 302  *
 303  * Coefficient matrix always with default values.
 304  */
 305 static void
 306 preview_config_whitebalance(struct isp_prev_device *prev,
 307                             const struct prev_params *params)
 308 {
 309         struct isp_device *isp = to_isp_device(prev);
 310         const struct omap3isp_prev_wbal *wbal = &params->wbal;
 311         u32 val;
 312
 313         isp_reg_writel(isp, wbal->dgain, OMAP3_ISP_IOMEM_PREV, ISPPRV_WB_DGAIN);
 314
 315         val = wbal->coef0 << ISPPRV_WBGAIN_COEF0_SHIFT;
 316         val |= wbal->coef1 << ISPPRV_WBGAIN_COEF1_SHIFT;
 317         val |= wbal->coef2 << ISPPRV_WBGAIN_COEF2_SHIFT;
 318         val |= wbal->coef3 << ISPPRV_WBGAIN_COEF3_SHIFT;
 319         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_WBGAIN);
 320
 321         isp_reg_writel(isp,
 322                        ISPPRV_WBSEL_COEF0 << ISPPRV_WBSEL_N0_0_SHIFT |
 323                        ISPPRV_WBSEL_COEF1 << ISPPRV_WBSEL_N0_1_SHIFT |
 324                        ISPPRV_WBSEL_COEF0 << ISPPRV_WBSEL_N0_2_SHIFT |
 325                        ISPPRV_WBSEL_COEF1 << ISPPRV_WBSEL_N0_3_SHIFT |
 326                        ISPPRV_WBSEL_COEF2 << ISPPRV_WBSEL_N1_0_SHIFT |
 327                        ISPPRV_WBSEL_COEF3 << ISPPRV_WBSEL_N1_1_SHIFT |
 328                        ISPPRV_WBSEL_COEF2 << ISPPRV_WBSEL_N1_2_SHIFT |
 329                        ISPPRV_WBSEL_COEF3 << ISPPRV_WBSEL_N1_3_SHIFT |
 330                        ISPPRV_WBSEL_COEF0 << ISPPRV_WBSEL_N2_0_SHIFT |
 331                        ISPPRV_WBSEL_COEF1 << ISPPRV_WBSEL_N2_1_SHIFT |
 332                        ISPPRV_WBSEL_COEF0 << ISPPRV_WBSEL_N2_2_SHIFT |
 333                        ISPPRV_WBSEL_COEF1 << ISPPRV_WBSEL_N2_3_SHIFT |
 334                        ISPPRV_WBSEL_COEF2 << ISPPRV_WBSEL_N3_0_SHIFT |
 335                        ISPPRV_WBSEL_COEF3 << ISPPRV_WBSEL_N3_1_SHIFT |
 336                        ISPPRV_WBSEL_COEF2 << ISPPRV_WBSEL_N3_2_SHIFT |
 337                        ISPPRV_WBSEL_COEF3 << ISPPRV_WBSEL_N3_3_SHIFT,
 338                        OMAP3_ISP_IOMEM_PREV, ISPPRV_WBSEL);
 339 }
 340
 341 /*
 342  * preview_config_blkadj - Configure Black Adjustment
 343  */
 344 static void
 345 preview_config_blkadj(struct isp_prev_device *prev,
 346                       const struct prev_params *params)
 347 {
 348         struct isp_device *isp = to_isp_device(prev);
 349         const struct omap3isp_prev_blkadj *blkadj = &params->blkadj;
 350
 351         isp_reg_writel(isp, (blkadj->blue << ISPPRV_BLKADJOFF_B_SHIFT) |
 352                        (blkadj->green << ISPPRV_BLKADJOFF_G_SHIFT) |
 353                        (blkadj->red << ISPPRV_BLKADJOFF_R_SHIFT),
 354                        OMAP3_ISP_IOMEM_PREV, ISPPRV_BLKADJOFF);
 355 }
 356
 357 /*
 358  * preview_config_rgb_blending - Configure RGB-RGB Blending
 359  */
 360 static void
 361 preview_config_rgb_blending(struct isp_prev_device *prev,
 362                             const struct prev_params *params)
 363 {
 364         struct isp_device *isp = to_isp_device(prev);
 365         const struct omap3isp_prev_rgbtorgb *rgbrgb = &params->rgb2rgb;
 366         u32 val;
 367
 368         val = (rgbrgb->matrix[0][0] & 0xfff) << ISPPRV_RGB_MAT1_MTX_RR_SHIFT;
 369         val |= (rgbrgb->matrix[0][1] & 0xfff) << ISPPRV_RGB_MAT1_MTX_GR_SHIFT;
 370         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_RGB_MAT1);
 371
 372         val = (rgbrgb->matrix[0][2] & 0xfff) << ISPPRV_RGB_MAT2_MTX_BR_SHIFT;
 373         val |= (rgbrgb->matrix[1][0] & 0xfff) << ISPPRV_RGB_MAT2_MTX_RG_SHIFT;
 374         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_RGB_MAT2);
 375
 376         val = (rgbrgb->matrix[1][1] & 0xfff) << ISPPRV_RGB_MAT3_MTX_GG_SHIFT;
 377         val |= (rgbrgb->matrix[1][2] & 0xfff) << ISPPRV_RGB_MAT3_MTX_BG_SHIFT;
 378         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_RGB_MAT3);
 379
 380         val = (rgbrgb->matrix[2][0] & 0xfff) << ISPPRV_RGB_MAT4_MTX_RB_SHIFT;
 381         val |= (rgbrgb->matrix[2][1] & 0xfff) << ISPPRV_RGB_MAT4_MTX_GB_SHIFT;
 382         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_RGB_MAT4);
 383
 384         val = (rgbrgb->matrix[2][2] & 0xfff) << ISPPRV_RGB_MAT5_MTX_BB_SHIFT;
 385         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_RGB_MAT5);
 386
 387         val = (rgbrgb->offset[0] & 0x3ff) << ISPPRV_RGB_OFF1_MTX_OFFR_SHIFT;
 388         val |= (rgbrgb->offset[1] & 0x3ff) << ISPPRV_RGB_OFF1_MTX_OFFG_SHIFT;
 389         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_RGB_OFF1);
 390
 391         val = (rgbrgb->offset[2] & 0x3ff) << ISPPRV_RGB_OFF2_MTX_OFFB_SHIFT;
 392         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_RGB_OFF2);
 393 }
 394
 395 /*
 396  * preview_config_csc - Configure Color Space Conversion (RGB to YCbYCr)
 397  */
 398 static void
 399 preview_config_csc(struct isp_prev_device *prev,
 400                    const struct prev_params *params)
 401 {
 402         struct isp_device *isp = to_isp_device(prev);
 403         const struct omap3isp_prev_csc *csc = &params->csc;
 404         u32 val;
 405
 406         val = (csc->matrix[0][0] & 0x3ff) << ISPPRV_CSC0_RY_SHIFT;
 407         val |= (csc->matrix[0][1] & 0x3ff) << ISPPRV_CSC0_GY_SHIFT;
 408         val |= (csc->matrix[0][2] & 0x3ff) << ISPPRV_CSC0_BY_SHIFT;
 409         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_CSC0);
 410
 411         val = (csc->matrix[1][0] & 0x3ff) << ISPPRV_CSC1_RCB_SHIFT;
 412         val |= (csc->matrix[1][1] & 0x3ff) << ISPPRV_CSC1_GCB_SHIFT;
 413         val |= (csc->matrix[1][2] & 0x3ff) << ISPPRV_CSC1_BCB_SHIFT;
 414         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_CSC1);
 415
 416         val = (csc->matrix[2][0] & 0x3ff) << ISPPRV_CSC2_RCR_SHIFT;
 417         val |= (csc->matrix[2][1] & 0x3ff) << ISPPRV_CSC2_GCR_SHIFT;
 418         val |= (csc->matrix[2][2] & 0x3ff) << ISPPRV_CSC2_BCR_SHIFT;
 419         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_CSC2);
 420
 421         val = (csc->offset[0] & 0xff) << ISPPRV_CSC_OFFSET_Y_SHIFT;
 422         val |= (csc->offset[1] & 0xff) << ISPPRV_CSC_OFFSET_CB_SHIFT;
 423         val |= (csc->offset[2] & 0xff) << ISPPRV_CSC_OFFSET_CR_SHIFT;
 424         isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_PREV, ISPPRV_CSC_OFFSET);
 425 }
 426
 427 /*
 428  * preview_config_yc_range - Configure the max and min Y and C values
 429  */
 430 static void
 431 preview_config_yc_range(struct isp_prev_device *prev,
 432                         const struct prev_params *params)
 433 {
 434         struct isp_device *isp = to_isp_device(prev);
 435         const struct omap3isp_prev_yclimit *yc = &params->yclimit;
 436
 437         isp_reg_writel(isp,
 438                        yc->maxC << ISPPRV_SETUP_YC_MAXC_SHIFT |
 439                        yc->maxY << ISPPRV_SETUP_YC_MAXY_SHIFT |
 440                        yc->minC << ISPPRV_SETUP_YC_MINC_SHIFT |
 441                        yc->minY << ISPPRV_SETUP_YC_MINY_SHIFT,
 442                        OMAP3_ISP_IOMEM_PREV, ISPPRV_SETUP_YC);
 443 }
 444
 445 /*
 446  * preview_config_dcor - Configure Couplet Defect Correction
 447  */
 448 static void
 449 preview_config_dcor(struct isp_prev_device *prev,
 450                     const struct prev_params *params)
 451 {
 452         struct isp_device *isp = to_isp_device(prev);
 453         const struct omap3isp_prev_dcor *dcor = &params->dcor;
 454
 455         isp_reg_writel(isp, dcor->detect_correct[0],
 456                        OMAP3_ISP_IOMEM_PREV, ISPPRV_CDC_THR0);
 457         isp_reg_writel(isp, dcor->detect_correct[1],
 458                        OMAP3_ISP_IOMEM_PREV, ISPPRV_CDC_THR1);
 459         isp_reg_writel(isp, dcor->detect_correct[2],
 460                        OMAP3_ISP_IOMEM_PREV, ISPPRV_CDC_THR2);
 461         isp_reg_writel(isp, dcor->detect_correct[3],
 462                        OMAP3_ISP_IOMEM_PREV, ISPPRV_CDC_THR3);
 463         isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 464                         ISPPRV_PCR_DCCOUP,
 465                         dcor->couplet_mode_en ? ISPPRV_PCR_DCCOUP : 0);
 466 }
 467
 468 /*
 469  * preview_enable_dcor - Enable/disable Couplet Defect Correction
 470  */
 471 static void preview_enable_dcor(struct isp_prev_device *prev, bool enable)
 472 {
 473         struct isp_device *isp = to_isp_device(prev);
 474
 475         if (enable)
 476                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 477                             ISPPRV_PCR_DCOREN);
 478         else
 479                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 480                             ISPPRV_PCR_DCOREN);
 481 }
 482
 483 /*
 484  * preview_enable_drkframe_capture - Enable/disable Dark Frame Capture
 485  */
 486 static void
 487 preview_enable_drkframe_capture(struct isp_prev_device *prev, bool enable)
 488 {
 489         struct isp_device *isp = to_isp_device(prev);
 490
 491         if (enable)
 492                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 493                             ISPPRV_PCR_DRKFCAP);
 494         else
 495                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 496                             ISPPRV_PCR_DRKFCAP);
 497 }
 498
 499 /*
 500  * preview_enable_drkframe - Enable/disable Dark Frame Subtraction
 501  */
 502 static void preview_enable_drkframe(struct isp_prev_device *prev, bool enable)
 503 {
 504         struct isp_device *isp = to_isp_device(prev);
 505
 506         if (enable)
 507                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 508                             ISPPRV_PCR_DRKFEN);
 509         else
 510                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 511                             ISPPRV_PCR_DRKFEN);
 512 }
 513
 514 /*
 515  * preview_config_noisefilter - Configure the Noise Filter
 516  */
 517 static void
 518 preview_config_noisefilter(struct isp_prev_device *prev,
 519                            const struct prev_params *params)
 520 {
 521         struct isp_device *isp = to_isp_device(prev);
 522         const struct omap3isp_prev_nf *nf = &params->nf;
 523         unsigned int i;
 524
 525         isp_reg_writel(isp, nf->spread, OMAP3_ISP_IOMEM_PREV, ISPPRV_NF);
 526         isp_reg_writel(isp, ISPPRV_NF_TABLE_ADDR,
 527                        OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_ADDR);
 528         for (i = 0; i < OMAP3ISP_PREV_NF_TBL_SIZE; i++) {
 529                 isp_reg_writel(isp, nf->table[i],
 530                                OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_DATA);
 531         }
 532 }
 533
 534 /*
 535  * preview_enable_noisefilter - Enable/disable the Noise Filter
 536  */
 537 static void
 538 preview_enable_noisefilter(struct isp_prev_device *prev, bool enable)
 539 {
 540         struct isp_device *isp = to_isp_device(prev);
 541
 542         if (enable)
 543                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 544                             ISPPRV_PCR_NFEN);
 545         else
 546                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 547                             ISPPRV_PCR_NFEN);
 548 }
 549
 550 /*
 551  * preview_config_gammacorrn - Configure the Gamma Correction tables
 552  */
 553 static void
 554 preview_config_gammacorrn(struct isp_prev_device *prev,
 555                           const struct prev_params *params)
 556 {
 557         struct isp_device *isp = to_isp_device(prev);
 558         const struct omap3isp_prev_gtables *gt = &params->gamma;
 559         unsigned int i;
 560
 561         isp_reg_writel(isp, ISPPRV_REDGAMMA_TABLE_ADDR,
 562                        OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_ADDR);
 563         for (i = 0; i < OMAP3ISP_PREV_GAMMA_TBL_SIZE; i++)
 564                 isp_reg_writel(isp, gt->red[i], OMAP3_ISP_IOMEM_PREV,
 565                                ISPPRV_SET_TBL_DATA);
 566
 567         isp_reg_writel(isp, ISPPRV_GREENGAMMA_TABLE_ADDR,
 568                        OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_ADDR);
 569         for (i = 0; i < OMAP3ISP_PREV_GAMMA_TBL_SIZE; i++)
 570                 isp_reg_writel(isp, gt->green[i], OMAP3_ISP_IOMEM_PREV,
 571                                ISPPRV_SET_TBL_DATA);
 572
 573         isp_reg_writel(isp, ISPPRV_BLUEGAMMA_TABLE_ADDR,
 574                        OMAP3_ISP_IOMEM_PREV, ISPPRV_SET_TBL_ADDR);
 575         for (i = 0; i < OMAP3ISP_PREV_GAMMA_TBL_SIZE; i++)
 576                 isp_reg_writel(isp, gt->blue[i], OMAP3_ISP_IOMEM_PREV,
 577                                ISPPRV_SET_TBL_DATA);
 578 }
 579
 580 /*
 581  * preview_enable_gammacorrn - Enable/disable Gamma Correction
 582  *
 583  * When gamma correction is disabled, the module is bypassed and its output is
 584  * the 8 MSB of the 10-bit input .
 585  */
 586 static void
 587 preview_enable_gammacorrn(struct isp_prev_device *prev, bool enable)
 588 {
 589         struct isp_device *isp = to_isp_device(prev);
 590
 591         if (enable)
 592                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 593                             ISPPRV_PCR_GAMMA_BYPASS);
 594         else
 595                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 596                             ISPPRV_PCR_GAMMA_BYPASS);
 597 }
 598
 599 /*
 600  * preview_config_contrast - Configure the Contrast
 601  *
 602  * Value should be programmed before enabling the module.
 603  */
 604 static void
 605 preview_config_contrast(struct isp_prev_device *prev,
 606                         const struct prev_params *params)
 607 {
 608         struct isp_device *isp = to_isp_device(prev);
 609
 610         isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_CNT_BRT,
 611                         0xff << ISPPRV_CNT_BRT_CNT_SHIFT,
 612                         params->contrast << ISPPRV_CNT_BRT_CNT_SHIFT);
 613 }
 614
 615 /*
 616  * preview_config_brightness - Configure the Brightness
 617  */
 618 static void
 619 preview_config_brightness(struct isp_prev_device *prev,
 620                           const struct prev_params *params)
 621 {
 622         struct isp_device *isp = to_isp_device(prev);
 623
 624         isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_CNT_BRT,
 625                         0xff << ISPPRV_CNT_BRT_BRT_SHIFT,
 626                         params->brightness << ISPPRV_CNT_BRT_BRT_SHIFT);
 627 }
 628
 629 /*
 630  * preview_update_contrast - Updates the contrast.
 631  * @contrast: Pointer to hold the current programmed contrast value.
 632  *
 633  * Value should be programmed before enabling the module.
 634  */
 635 static void
 636 preview_update_contrast(struct isp_prev_device *prev, u8 contrast)
 637 {
 638         struct prev_params *params;
 639         unsigned long flags;
 640
 641         spin_lock_irqsave(&prev->params.lock, flags);
 642         params = (prev->params.active & OMAP3ISP_PREV_CONTRAST)
 643                ? &prev->params.params[0] : &prev->params.params[1];
 644
 645         if (params->contrast != (contrast * ISPPRV_CONTRAST_UNITS)) {
 646                 params->contrast = contrast * ISPPRV_CONTRAST_UNITS;
 647                 params->update |= OMAP3ISP_PREV_CONTRAST;
 648         }
 649         spin_unlock_irqrestore(&prev->params.lock, flags);
 650 }
 651
 652 /*
 653  * preview_update_brightness - Updates the brightness in preview module.
 654  * @brightness: Pointer to hold the current programmed brightness value.
 655  *
 656  */
 657 static void
 658 preview_update_brightness(struct isp_prev_device *prev, u8 brightness)
 659 {
 660         struct prev_params *params;
 661         unsigned long flags;
 662
 663         spin_lock_irqsave(&prev->params.lock, flags);
 664         params = (prev->params.active & OMAP3ISP_PREV_BRIGHTNESS)
 665                ? &prev->params.params[0] : &prev->params.params[1];
 666
 667         if (params->brightness != (brightness * ISPPRV_BRIGHT_UNITS)) {
 668                 params->brightness = brightness * ISPPRV_BRIGHT_UNITS;
 669                 params->update |= OMAP3ISP_PREV_BRIGHTNESS;
 670         }
 671         spin_unlock_irqrestore(&prev->params.lock, flags);
 672 }
 673
 674 static u32
 675 preview_params_lock(struct isp_prev_device *prev, u32 update, bool shadow)
 676 {
 677         u32 active = prev->params.active;
 678
 679         if (shadow) {
 680                 /* Mark all shadow parameters we are going to touch as busy. */
 681                 prev->params.params[0].busy |= ~active & update;
 682                 prev->params.params[1].busy |= active & update;
 683         } else {
 684                 /* Mark all active parameters we are going to touch as busy. */
 685                 update = (prev->params.params[0].update & active)
 686                        | (prev->params.params[1].update & ~active);
 687
 688                 prev->params.params[0].busy |= active & update;
 689                 prev->params.params[1].busy |= ~active & update;
 690         }
 691
 692         return update;
 693 }
 694
 695 static void
 696 preview_params_unlock(struct isp_prev_device *prev, u32 update, bool shadow)
 697 {
 698         u32 active = prev->params.active;
 699
 700         if (shadow) {
 701                 /* Set the update flag for shadow parameters that have been
 702                  * updated and clear the busy flag for all shadow parameters.
 703                  */
 704                 prev->params.params[0].update |= (~active & update);
 705                 prev->params.params[1].update |= (active & update);
 706                 prev->params.params[0].busy &= active;
 707                 prev->params.params[1].busy &= ~active;
 708         } else {
 709                 /* Clear the update flag for active parameters that have been
 710                  * applied and the busy flag for all active parameters.
 711                  */
 712                 prev->params.params[0].update &= ~(active & update);
 713                 prev->params.params[1].update &= ~(~active & update);
 714                 prev->params.params[0].busy &= ~active;
 715                 prev->params.params[1].busy &= active;
 716         }
 717 }
 718
 719 static void preview_params_switch(struct isp_prev_device *prev)
 720 {
 721         u32 to_switch;
 722
 723         /* Switch active parameters with updated shadow parameters when the
 724          * shadow parameter has been updated and neither the active not the
 725          * shadow parameter is busy.
 726          */
 727         to_switch = (prev->params.params[0].update & ~prev->params.active)
 728                   | (prev->params.params[1].update & prev->params.active);
 729         to_switch &= ~(prev->params.params[0].busy |
 730                        prev->params.params[1].busy);
 731         if (to_switch == 0)
 732                 return;
 733
 734         prev->params.active ^= to_switch;
 735
 736         /* Remove the update flag for the shadow copy of parameters we have
 737          * switched.
 738          */
 739         prev->params.params[0].update &= ~(~prev->params.active & to_switch);
 740         prev->params.params[1].update &= ~(prev->params.active & to_switch);
 741 }
 742
 743 /* preview parameters update structure */
 744 struct preview_update {
 745         void (*config)(struct isp_prev_device *, const struct prev_params *);
 746         void (*enable)(struct isp_prev_device *, bool);
 747         unsigned int param_offset;
 748         unsigned int param_size;
 749         unsigned int config_offset;
 750         bool skip;
 751 };
 752
 753 /* Keep the array indexed by the OMAP3ISP_PREV_* bit number. */
 754 static const struct preview_update update_attrs[] = {
 755         /* OMAP3ISP_PREV_LUMAENH */ {
 756                 preview_config_luma_enhancement,
 757                 preview_enable_luma_enhancement,
 758                 offsetof(struct prev_params, luma),
 759                 FIELD_SIZEOF(struct prev_params, luma),
 760                 offsetof(struct omap3isp_prev_update_config, luma),
 761         }, /* OMAP3ISP_PREV_INVALAW */ {
 762                 NULL,
 763                 preview_enable_invalaw,
 764         }, /* OMAP3ISP_PREV_HRZ_MED */ {
 765                 preview_config_hmed,
 766                 preview_enable_hmed,
 767                 offsetof(struct prev_params, hmed),
 768                 FIELD_SIZEOF(struct prev_params, hmed),
 769                 offsetof(struct omap3isp_prev_update_config, hmed),
 770         }, /* OMAP3ISP_PREV_CFA */ {
 771                 preview_config_cfa,
 772                 NULL,
 773                 offsetof(struct prev_params, cfa),
 774                 FIELD_SIZEOF(struct prev_params, cfa),
 775                 offsetof(struct omap3isp_prev_update_config, cfa),
 776         }, /* OMAP3ISP_PREV_CHROMA_SUPP */ {
 777                 preview_config_chroma_suppression,
 778                 preview_enable_chroma_suppression,
 779                 offsetof(struct prev_params, csup),
 780                 FIELD_SIZEOF(struct prev_params, csup),
 781                 offsetof(struct omap3isp_prev_update_config, csup),
 782         }, /* OMAP3ISP_PREV_WB */ {
 783                 preview_config_whitebalance,
 784                 NULL,
 785                 offsetof(struct prev_params, wbal),
 786                 FIELD_SIZEOF(struct prev_params, wbal),
 787                 offsetof(struct omap3isp_prev_update_config, wbal),
 788         }, /* OMAP3ISP_PREV_BLKADJ */ {
 789                 preview_config_blkadj,
 790                 NULL,
 791                 offsetof(struct prev_params, blkadj),
 792                 FIELD_SIZEOF(struct prev_params, blkadj),
 793                 offsetof(struct omap3isp_prev_update_config, blkadj),
 794         }, /* OMAP3ISP_PREV_RGB2RGB */ {
 795                 preview_config_rgb_blending,
 796                 NULL,
 797                 offsetof(struct prev_params, rgb2rgb),
 798                 FIELD_SIZEOF(struct prev_params, rgb2rgb),
 799                 offsetof(struct omap3isp_prev_update_config, rgb2rgb),
 800         }, /* OMAP3ISP_PREV_COLOR_CONV */ {
 801                 preview_config_csc,
 802                 NULL,
 803                 offsetof(struct prev_params, csc),
 804                 FIELD_SIZEOF(struct prev_params, csc),
 805                 offsetof(struct omap3isp_prev_update_config, csc),
 806         }, /* OMAP3ISP_PREV_YC_LIMIT */ {
 807                 preview_config_yc_range,
 808                 NULL,
 809                 offsetof(struct prev_params, yclimit),
 810                 FIELD_SIZEOF(struct prev_params, yclimit),
 811                 offsetof(struct omap3isp_prev_update_config, yclimit),
 812         }, /* OMAP3ISP_PREV_DEFECT_COR */ {
 813                 preview_config_dcor,
 814                 preview_enable_dcor,
 815                 offsetof(struct prev_params, dcor),
 816                 FIELD_SIZEOF(struct prev_params, dcor),
 817                 offsetof(struct omap3isp_prev_update_config, dcor),
 818         }, /* Previously OMAP3ISP_PREV_GAMMABYPASS, not used anymore */ {
 819                 NULL,
 820                 NULL,
 821         }, /* OMAP3ISP_PREV_DRK_FRM_CAPTURE */ {
 822                 NULL,
 823                 preview_enable_drkframe_capture,
 824         }, /* OMAP3ISP_PREV_DRK_FRM_SUBTRACT */ {
 825                 NULL,
 826                 preview_enable_drkframe,
 827         }, /* OMAP3ISP_PREV_LENS_SHADING */ {
 828                 NULL,
 829                 preview_enable_drkframe,
 830         }, /* OMAP3ISP_PREV_NF */ {
 831                 preview_config_noisefilter,
 832                 preview_enable_noisefilter,
 833                 offsetof(struct prev_params, nf),
 834                 FIELD_SIZEOF(struct prev_params, nf),
 835                 offsetof(struct omap3isp_prev_update_config, nf),
 836         }, /* OMAP3ISP_PREV_GAMMA */ {
 837                 preview_config_gammacorrn,
 838                 preview_enable_gammacorrn,
 839                 offsetof(struct prev_params, gamma),
 840                 FIELD_SIZEOF(struct prev_params, gamma),
 841                 offsetof(struct omap3isp_prev_update_config, gamma),
 842         }, /* OMAP3ISP_PREV_CONTRAST */ {
 843                 preview_config_contrast,
 844                 NULL,
 845                 0, 0, 0, true,
 846         }, /* OMAP3ISP_PREV_BRIGHTNESS */ {
 847                 preview_config_brightness,
 848                 NULL,
 849                 0, 0, 0, true,
 850         },
 851 };
 852
 853 /*
 854  * preview_config - Copy and update local structure with userspace preview
 855  *                  configuration.
 856  * @prev: ISP preview engine
 857  * @cfg: Configuration
 858  *
 859  * Return zero if success or -EFAULT if the configuration can't be copied from
 860  * userspace.
 861  */
 862 static int preview_config(struct isp_prev_device *prev,
 863                           struct omap3isp_prev_update_config *cfg)
 864 {
 865         unsigned long flags;
 866         unsigned int i;
 867         int rval = 0;
 868         u32 update;
 869         u32 active;
 870
 871         if (cfg->update == 0)
 872                 return 0;
 873
 874         /* Mark the shadow parameters we're going to update as busy. */
 875         spin_lock_irqsave(&prev->params.lock, flags);
 876         preview_params_lock(prev, cfg->update, true);
 877         active = prev->params.active;
 878         spin_unlock_irqrestore(&prev->params.lock, flags);
 879
 880         update = 0;
 881
 882         for (i = 0; i < ARRAY_SIZE(update_attrs); i++) {
 883                 const struct preview_update *attr = &update_attrs[i];
 884                 struct prev_params *params;
 885                 unsigned int bit = 1 << i;
 886
 887                 if (attr->skip || !(cfg->update & bit))
 888                         continue;
 889
 890                 params = &prev->params.params[!!(active & bit)];
 891
 892                 if (cfg->flag & bit) {
 893                         void __user *from = *(void * __user *)
 894                                 ((void *)cfg + attr->config_offset);
 895                         void *to = (void *)params + attr->param_offset;
 896                         size_t size = attr->param_size;
 897
 898                         if (to && from && size) {
 899                                 if (copy_from_user(to, from, size)) {
 900                                         rval = -EFAULT;
 901                                         break;
 902                                 }
 903                         }
 904                         params->features |= bit;
 905                 } else {
 906                         params->features &= ~bit;
 907                 }
 908
 909                 update |= bit;
 910         }
 911
 912         spin_lock_irqsave(&prev->params.lock, flags);
 913         preview_params_unlock(prev, update, true);
 914         preview_params_switch(prev);
 915         spin_unlock_irqrestore(&prev->params.lock, flags);
 916
 917         return rval;
 918 }
 919
 920 /*
 921  * preview_setup_hw - Setup preview registers and/or internal memory
 922  * @prev: pointer to preview private structure
 923  * @update: Bitmask of parameters to setup
 924  * @active: Bitmask of parameters active in set 0
 925  * Note: can be called from interrupt context
 926  * Return none
 927  */
 928 static void preview_setup_hw(struct isp_prev_device *prev, u32 update,
 929                              u32 active)
 930 {
 931         unsigned int i;
 932
 933         if (update == 0)
 934                 return;
 935
 936         for (i = 0; i < ARRAY_SIZE(update_attrs); i++) {
 937                 const struct preview_update *attr = &update_attrs[i];
 938                 struct prev_params *params;
 939                 unsigned int bit = 1 << i;
 940
 941                 if (!(update & bit))
 942                         continue;
 943
 944                 params = &prev->params.params[!(active & bit)];
 945
 946                 if (params->features & bit) {
 947                         if (attr->config)
 948                                 attr->config(prev, params);
 949                         if (attr->enable)
 950                                 attr->enable(prev, true);
 951                 } else {
 952                         if (attr->enable)
 953                                 attr->enable(prev, false);
 954                 }
 955         }
 956 }
 957
 958 /*
 959  * preview_config_ycpos - Configure byte layout of YUV image.
 960  * @prev: pointer to previewer private structure
 961  * @pixelcode: pixel code
 962  */
 963 static void preview_config_ycpos(struct isp_prev_device *prev, u32 pixelcode)
 964 {
 965         struct isp_device *isp = to_isp_device(prev);
 966         enum preview_ycpos_mode mode;
 967
 968         switch (pixelcode) {
 969         case MEDIA_BUS_FMT_YUYV8_1X16:
 970                 mode = YCPOS_CrYCbY;
 971                 break;
 972         case MEDIA_BUS_FMT_UYVY8_1X16:
 973                 mode = YCPOS_YCrYCb;
 974                 break;
 975         default:
 976                 return;
 977         }
 978
 979         isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
 980                         ISPPRV_PCR_YCPOS_CrYCbY,
 981                         mode << ISPPRV_PCR_YCPOS_SHIFT);
 982 }
 983
 984 /*
 985  * preview_config_averager - Enable / disable / configure averager
 986  * @average: Average value to be configured.
 987  */
 988 static void preview_config_averager(struct isp_prev_device *prev, u8 average)
 989 {
 990         struct isp_device *isp = to_isp_device(prev);
 991
 992         isp_reg_writel(isp, ISPPRV_AVE_EVENDIST_2 << ISPPRV_AVE_EVENDIST_SHIFT |
 993                        ISPPRV_AVE_ODDDIST_2 << ISPPRV_AVE_ODDDIST_SHIFT |
 994                        average, OMAP3_ISP_IOMEM_PREV, ISPPRV_AVE);
 995 }
 996
 997
 998 /*
 999  * preview_config_input_format - Configure the input format
1000  * @prev: The preview engine
1001  * @info: Sink pad format information
1002  *
1003  * Enable and configure CFA interpolation for Bayer formats and disable it for
1004  * greyscale formats.
1005  *
1006  * The CFA table is organised in four blocks, one per Bayer component. The
1007  * hardware expects blocks to follow the Bayer order of the input data, while
1008  * the driver stores the table in GRBG order in memory. The blocks need to be
1009  * reordered to support non-GRBG Bayer patterns.
1010  */
1011 static void preview_config_input_format(struct isp_prev_device *prev,
1012                                         const struct isp_format_info *info)
1013 {
1014         struct isp_device *isp = to_isp_device(prev);
1015         struct prev_params *params;
1016
1017         if (info->width == 8)
1018                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1019                             ISPPRV_PCR_WIDTH);
1020         else
1021                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1022                             ISPPRV_PCR_WIDTH);
1023
1024         switch (info->flavor) {
1025         case MEDIA_BUS_FMT_SGRBG8_1X8:
1026                 prev->params.cfa_order = 0;
1027                 break;
1028         case MEDIA_BUS_FMT_SRGGB8_1X8:
1029                 prev->params.cfa_order = 1;
1030                 break;
1031         case MEDIA_BUS_FMT_SBGGR8_1X8:
1032                 prev->params.cfa_order = 2;
1033                 break;
1034         case MEDIA_BUS_FMT_SGBRG8_1X8:
1035                 prev->params.cfa_order = 3;
1036                 break;
1037         default:
1038                 /* Disable CFA for non-Bayer formats. */
1039                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1040                             ISPPRV_PCR_CFAEN);
1041                 return;
1042         }
1043
1044         isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR, ISPPRV_PCR_CFAEN);
1045         isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1046                         ISPPRV_PCR_CFAFMT_MASK, ISPPRV_PCR_CFAFMT_BAYER);
1047
1048         params = (prev->params.active & OMAP3ISP_PREV_CFA)
1049                ? &prev->params.params[0] : &prev->params.params[1];
1050
1051         preview_config_cfa(prev, params);
1052 }
1053
1054 /*
1055  * preview_config_input_size - Configure the input frame size
1056  *
1057  * The preview engine crops several rows and columns internally depending on
1058  * which processing blocks are enabled. The driver assumes all those blocks are
1059  * enabled when reporting source pad formats to userspace. If this assumption is
1060  * not true, rows and columns must be manually cropped at the preview engine
1061  * input to avoid overflows at the end of lines and frames.
1062  *
1063  * See the explanation at the PREV_MARGIN_* definitions for more details.
1064  */
1065 static void preview_config_input_size(struct isp_prev_device *prev, u32 active)
1066 {
1067         const struct v4l2_mbus_framefmt *format = &prev->formats[PREV_PAD_SINK];
1068         struct isp_device *isp = to_isp_device(prev);
1069         unsigned int sph = prev->crop.left;
1070         unsigned int eph = prev->crop.left + prev->crop.width - 1;
1071         unsigned int slv = prev->crop.top;
1072         unsigned int elv = prev->crop.top + prev->crop.height - 1;
1073         u32 features;
1074
1075         if (format->code != MEDIA_BUS_FMT_Y8_1X8 &&
1076             format->code != MEDIA_BUS_FMT_Y10_1X10) {
1077                 sph -= 2;
1078                 eph += 2;
1079                 slv -= 2;
1080                 elv += 2;
1081         }
1082
1083         features = (prev->params.params[0].features & active)
1084                  | (prev->params.params[1].features & ~active);
1085
1086         if (features & (OMAP3ISP_PREV_DEFECT_COR | OMAP3ISP_PREV_NF)) {
1087                 sph -= 2;
1088                 eph += 2;
1089                 slv -= 2;
1090                 elv += 2;
1091         }
1092         if (features & OMAP3ISP_PREV_HRZ_MED) {
1093                 sph -= 2;
1094                 eph += 2;
1095         }
1096         if (features & (OMAP3ISP_PREV_CHROMA_SUPP | OMAP3ISP_PREV_LUMAENH))
1097                 sph -= 2;
1098
1099         isp_reg_writel(isp, (sph << ISPPRV_HORZ_INFO_SPH_SHIFT) | eph,
1100                        OMAP3_ISP_IOMEM_PREV, ISPPRV_HORZ_INFO);
1101         isp_reg_writel(isp, (slv << ISPPRV_VERT_INFO_SLV_SHIFT) | elv,
1102                        OMAP3_ISP_IOMEM_PREV, ISPPRV_VERT_INFO);
1103 }
1104
1105 /*
1106  * preview_config_inlineoffset - Configures the Read address line offset.
1107  * @prev: Preview module
1108  * @offset: Line offset
1109  *
1110  * According to the TRM, the line offset must be aligned on a 32 bytes boundary.
1111  * However, a hardware bug requires the memory start address to be aligned on a
1112  * 64 bytes boundary, so the offset probably should be aligned on 64 bytes as
1113  * well.
1114  */
1115 static void
1116 preview_config_inlineoffset(struct isp_prev_device *prev, u32 offset)
1117 {
1118         struct isp_device *isp = to_isp_device(prev);
1119
1120         isp_reg_writel(isp, offset & 0xffff, OMAP3_ISP_IOMEM_PREV,
1121                        ISPPRV_RADR_OFFSET);
1122 }
1123
1124 /*
1125  * preview_set_inaddr - Sets memory address of input frame.
1126  * @addr: 32bit memory address aligned on 32byte boundary.
1127  *
1128  * Configures the memory address from which the input frame is to be read.
1129  */
1130 static void preview_set_inaddr(struct isp_prev_device *prev, u32 addr)
1131 {
1132         struct isp_device *isp = to_isp_device(prev);
1133
1134         isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_PREV, ISPPRV_RSDR_ADDR);
1135 }
1136
1137 /*
1138  * preview_config_outlineoffset - Configures the Write address line offset.
1139  * @offset: Line Offset for the preview output.
1140  *
1141  * The offset must be a multiple of 32 bytes.
1142  */
1143 static void preview_config_outlineoffset(struct isp_prev_device *prev,
1144                                     u32 offset)
1145 {
1146         struct isp_device *isp = to_isp_device(prev);
1147
1148         isp_reg_writel(isp, offset & 0xffff, OMAP3_ISP_IOMEM_PREV,
1149                        ISPPRV_WADD_OFFSET);
1150 }
1151
1152 /*
1153  * preview_set_outaddr - Sets the memory address to store output frame
1154  * @addr: 32bit memory address aligned on 32byte boundary.
1155  *
1156  * Configures the memory address to which the output frame is written.
1157  */
1158 static void preview_set_outaddr(struct isp_prev_device *prev, u32 addr)
1159 {
1160         struct isp_device *isp = to_isp_device(prev);
1161
1162         isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_PREV, ISPPRV_WSDR_ADDR);
1163 }
1164
1165 static void preview_adjust_bandwidth(struct isp_prev_device *prev)
1166 {
1167         struct isp_pipeline *pipe = to_isp_pipeline(&prev->subdev.entity);
1168         struct isp_device *isp = to_isp_device(prev);
1169         const struct v4l2_mbus_framefmt *ifmt = &prev->formats[PREV_PAD_SINK];
1170         unsigned long l3_ick = pipe->l3_ick;
1171         struct v4l2_fract *timeperframe;
1172         unsigned int cycles_per_frame;
1173         unsigned int requests_per_frame;
1174         unsigned int cycles_per_request;
1175         unsigned int minimum;
1176         unsigned int maximum;
1177         unsigned int value;
1178
1179         if (prev->input != PREVIEW_INPUT_MEMORY) {
1180                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
1181                             ISPSBL_SDR_REQ_PRV_EXP_MASK);
1182                 return;
1183         }
1184
1185         /* Compute the minimum number of cycles per request, based on the
1186          * pipeline maximum data rate. This is an absolute lower bound if we
1187          * don't want SBL overflows, so round the value up.
1188          */
1189         cycles_per_request = div_u64((u64)l3_ick / 2 * 256 + pipe->max_rate - 1,
1190                                      pipe->max_rate);
1191         minimum = DIV_ROUND_UP(cycles_per_request, 32);
1192
1193         /* Compute the maximum number of cycles per request, based on the
1194          * requested frame rate. This is a soft upper bound to achieve a frame
1195          * rate equal or higher than the requested value, so round the value
1196          * down.
1197          */
1198         timeperframe = &pipe->max_timeperframe;
1199
1200         requests_per_frame = DIV_ROUND_UP(ifmt->width * 2, 256) * ifmt->height;
1201         cycles_per_frame = div_u64((u64)l3_ick * timeperframe->numerator,
1202                                    timeperframe->denominator);
1203         cycles_per_request = cycles_per_frame / requests_per_frame;
1204
1205         maximum = cycles_per_request / 32;
1206
1207         value = max(minimum, maximum);
1208
1209         dev_dbg(isp->dev, "%s: cycles per request = %u\n", __func__, value);
1210         isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
1211                         ISPSBL_SDR_REQ_PRV_EXP_MASK,
1212                         value << ISPSBL_SDR_REQ_PRV_EXP_SHIFT);
1213 }
1214
1215 /*
1216  * omap3isp_preview_busy - Gets busy state of preview module.
1217  */
1218 int omap3isp_preview_busy(struct isp_prev_device *prev)
1219 {
1220         struct isp_device *isp = to_isp_device(prev);
1221
1222         return isp_reg_readl(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR)
1223                 & ISPPRV_PCR_BUSY;
1224 }
1225
1226 /*
1227  * omap3isp_preview_restore_context - Restores the values of preview registers
1228  */
1229 void omap3isp_preview_restore_context(struct isp_device *isp)
1230 {
1231         struct isp_prev_device *prev = &isp->isp_prev;
1232         const u32 update = OMAP3ISP_PREV_FEATURES_END - 1;
1233
1234         prev->params.params[0].update = prev->params.active & update;
1235         prev->params.params[1].update = ~prev->params.active & update;
1236
1237         preview_setup_hw(prev, update, prev->params.active);
1238
1239         prev->params.params[0].update = 0;
1240         prev->params.params[1].update = 0;
1241 }
1242
1243 /*
1244  * preview_print_status - Dump preview module registers to the kernel log
1245  */
1246 #define PREV_PRINT_REGISTER(isp, name)\
1247         dev_dbg(isp->dev, "###PRV " #name "=0x%08x\n", \
1248                 isp_reg_readl(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_##name))
1249
1250 static void preview_print_status(struct isp_prev_device *prev)
1251 {
1252         struct isp_device *isp = to_isp_device(prev);
1253
1254         dev_dbg(isp->dev, "-------------Preview Register dump----------\n");
1255
1256         PREV_PRINT_REGISTER(isp, PCR);
1257         PREV_PRINT_REGISTER(isp, HORZ_INFO);
1258         PREV_PRINT_REGISTER(isp, VERT_INFO);
1259         PREV_PRINT_REGISTER(isp, RSDR_ADDR);
1260         PREV_PRINT_REGISTER(isp, RADR_OFFSET);
1261         PREV_PRINT_REGISTER(isp, DSDR_ADDR);
1262         PREV_PRINT_REGISTER(isp, DRKF_OFFSET);
1263         PREV_PRINT_REGISTER(isp, WSDR_ADDR);
1264         PREV_PRINT_REGISTER(isp, WADD_OFFSET);
1265         PREV_PRINT_REGISTER(isp, AVE);
1266         PREV_PRINT_REGISTER(isp, HMED);
1267         PREV_PRINT_REGISTER(isp, NF);
1268         PREV_PRINT_REGISTER(isp, WB_DGAIN);
1269         PREV_PRINT_REGISTER(isp, WBGAIN);
1270         PREV_PRINT_REGISTER(isp, WBSEL);
1271         PREV_PRINT_REGISTER(isp, CFA);
1272         PREV_PRINT_REGISTER(isp, BLKADJOFF);
1273         PREV_PRINT_REGISTER(isp, RGB_MAT1);
1274         PREV_PRINT_REGISTER(isp, RGB_MAT2);
1275         PREV_PRINT_REGISTER(isp, RGB_MAT3);
1276         PREV_PRINT_REGISTER(isp, RGB_MAT4);
1277         PREV_PRINT_REGISTER(isp, RGB_MAT5);
1278         PREV_PRINT_REGISTER(isp, RGB_OFF1);
1279         PREV_PRINT_REGISTER(isp, RGB_OFF2);
1280         PREV_PRINT_REGISTER(isp, CSC0);
1281         PREV_PRINT_REGISTER(isp, CSC1);
1282         PREV_PRINT_REGISTER(isp, CSC2);
1283         PREV_PRINT_REGISTER(isp, CSC_OFFSET);
1284         PREV_PRINT_REGISTER(isp, CNT_BRT);
1285         PREV_PRINT_REGISTER(isp, CSUP);
1286         PREV_PRINT_REGISTER(isp, SETUP_YC);
1287         PREV_PRINT_REGISTER(isp, SET_TBL_ADDR);
1288         PREV_PRINT_REGISTER(isp, CDC_THR0);
1289         PREV_PRINT_REGISTER(isp, CDC_THR1);
1290         PREV_PRINT_REGISTER(isp, CDC_THR2);
1291         PREV_PRINT_REGISTER(isp, CDC_THR3);
1292
1293         dev_dbg(isp->dev, "--------------------------------------------\n");
1294 }
1295
1296 /*
1297  * preview_init_params - init image processing parameters.
1298  * @prev: pointer to previewer private structure
1299  */
1300 static void preview_init_params(struct isp_prev_device *prev)
1301 {
1302         struct prev_params *params;
1303         unsigned int i;
1304
1305         spin_lock_init(&prev->params.lock);
1306
1307         prev->params.active = ~0;
1308         prev->params.params[0].busy = 0;
1309         prev->params.params[0].update = OMAP3ISP_PREV_FEATURES_END - 1;
1310         prev->params.params[1].busy = 0;
1311         prev->params.params[1].update = 0;
1312
1313         params = &prev->params.params[0];
1314
1315         /* Init values */
1316         params->contrast = ISPPRV_CONTRAST_DEF * ISPPRV_CONTRAST_UNITS;
1317         params->brightness = ISPPRV_BRIGHT_DEF * ISPPRV_BRIGHT_UNITS;
1318         params->cfa.format = OMAP3ISP_CFAFMT_BAYER;
1319         memcpy(params->cfa.table, cfa_coef_table,
1320                sizeof(params->cfa.table));
1321         params->cfa.gradthrs_horz = FLR_CFA_GRADTHRS_HORZ;
1322         params->cfa.gradthrs_vert = FLR_CFA_GRADTHRS_VERT;
1323         params->csup.gain = FLR_CSUP_GAIN;
1324         params->csup.thres = FLR_CSUP_THRES;
1325         params->csup.hypf_en = 0;
1326         memcpy(params->luma.table, luma_enhance_table,
1327                sizeof(params->luma.table));
1328         params->nf.spread = FLR_NF_STRGTH;
1329         memcpy(params->nf.table, noise_filter_table, sizeof(params->nf.table));
1330         params->dcor.couplet_mode_en = 1;
1331         for (i = 0; i < OMAP3ISP_PREV_DETECT_CORRECT_CHANNELS; i++)
1332                 params->dcor.detect_correct[i] = DEF_DETECT_CORRECT_VAL;
1333         memcpy(params->gamma.blue, gamma_table, sizeof(params->gamma.blue));
1334         memcpy(params->gamma.green, gamma_table, sizeof(params->gamma.green));
1335         memcpy(params->gamma.red, gamma_table, sizeof(params->gamma.red));
1336         params->wbal.dgain = FLR_WBAL_DGAIN;
1337         params->wbal.coef0 = FLR_WBAL_COEF;
1338         params->wbal.coef1 = FLR_WBAL_COEF;
1339         params->wbal.coef2 = FLR_WBAL_COEF;
1340         params->wbal.coef3 = FLR_WBAL_COEF;
1341         params->blkadj.red = FLR_BLKADJ_RED;
1342         params->blkadj.green = FLR_BLKADJ_GREEN;
1343         params->blkadj.blue = FLR_BLKADJ_BLUE;
1344         params->rgb2rgb = flr_rgb2rgb;
1345         params->csc = flr_prev_csc;
1346         params->yclimit.minC = ISPPRV_YC_MIN;
1347         params->yclimit.maxC = ISPPRV_YC_MAX;
1348         params->yclimit.minY = ISPPRV_YC_MIN;
1349         params->yclimit.maxY = ISPPRV_YC_MAX;
1350
1351         params->features = OMAP3ISP_PREV_CFA | OMAP3ISP_PREV_DEFECT_COR
1352                          | OMAP3ISP_PREV_NF | OMAP3ISP_PREV_GAMMA
1353                          | OMAP3ISP_PREV_BLKADJ | OMAP3ISP_PREV_YC_LIMIT
1354                          | OMAP3ISP_PREV_RGB2RGB | OMAP3ISP_PREV_COLOR_CONV
1355                          | OMAP3ISP_PREV_WB | OMAP3ISP_PREV_BRIGHTNESS
1356                          | OMAP3ISP_PREV_CONTRAST;
1357 }
1358
1359 /*
1360  * preview_max_out_width - Handle previewer hardware output limitations
1361  * @prev: pointer to previewer private structure
1362  * returns maximum width output for current isp revision
1363  */
1364 static unsigned int preview_max_out_width(struct isp_prev_device *prev)
1365 {
1366         struct isp_device *isp = to_isp_device(prev);
1367
1368         switch (isp->revision) {
1369         case ISP_REVISION_1_0:
1370                 return PREV_MAX_OUT_WIDTH_REV_1;
1371
1372         case ISP_REVISION_2_0:
1373         default:
1374                 return PREV_MAX_OUT_WIDTH_REV_2;
1375
1376         case ISP_REVISION_15_0:
1377                 return PREV_MAX_OUT_WIDTH_REV_15;
1378         }
1379 }
1380
1381 static void preview_configure(struct isp_prev_device *prev)
1382 {
1383         struct isp_device *isp = to_isp_device(prev);
1384         const struct isp_format_info *info;
1385         struct v4l2_mbus_framefmt *format;
1386         unsigned long flags;
1387         u32 update;
1388         u32 active;
1389
1390         spin_lock_irqsave(&prev->params.lock, flags);
1391         /* Mark all active parameters we are going to touch as busy. */
1392         update = preview_params_lock(prev, 0, false);
1393         active = prev->params.active;
1394         spin_unlock_irqrestore(&prev->params.lock, flags);
1395
1396         /* PREV_PAD_SINK */
1397         format = &prev->formats[PREV_PAD_SINK];
1398         info = omap3isp_video_format_info(format->code);
1399
1400         preview_adjust_bandwidth(prev);
1401
1402         preview_config_input_format(prev, info);
1403         preview_config_input_size(prev, active);
1404
1405         if (prev->input == PREVIEW_INPUT_CCDC)
1406                 preview_config_inlineoffset(prev, 0);
1407         else
1408                 preview_config_inlineoffset(prev, ALIGN(format->width, 0x20) *
1409                                             info->bpp);
1410
1411         preview_setup_hw(prev, update, active);
1412
1413         /* PREV_PAD_SOURCE */
1414         format = &prev->formats[PREV_PAD_SOURCE];
1415
1416         if (prev->output & PREVIEW_OUTPUT_MEMORY)
1417                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1418                             ISPPRV_PCR_SDRPORT);
1419         else
1420                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1421                             ISPPRV_PCR_SDRPORT);
1422
1423         if (prev->output & PREVIEW_OUTPUT_RESIZER)
1424                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1425                             ISPPRV_PCR_RSZPORT);
1426         else
1427                 isp_reg_clr(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1428                             ISPPRV_PCR_RSZPORT);
1429
1430         if (prev->output & PREVIEW_OUTPUT_MEMORY)
1431                 preview_config_outlineoffset(prev,
1432                                 ALIGN(format->width, 0x10) * 2);
1433
1434         preview_config_averager(prev, 0);
1435         preview_config_ycpos(prev, format->code);
1436
1437         spin_lock_irqsave(&prev->params.lock, flags);
1438         preview_params_unlock(prev, update, false);
1439         spin_unlock_irqrestore(&prev->params.lock, flags);
1440 }
1441
1442 /* -----------------------------------------------------------------------------
1443  * Interrupt handling
1444  */
1445
1446 static void preview_enable_oneshot(struct isp_prev_device *prev)
1447 {
1448         struct isp_device *isp = to_isp_device(prev);
1449
1450         /* The PCR.SOURCE bit is automatically reset to 0 when the PCR.ENABLE
1451          * bit is set. As the preview engine is used in single-shot mode, we
1452          * need to set PCR.SOURCE before enabling the preview engine.
1453          */
1454         if (prev->input == PREVIEW_INPUT_MEMORY)
1455                 isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1456                             ISPPRV_PCR_SOURCE);
1457
1458         isp_reg_set(isp, OMAP3_ISP_IOMEM_PREV, ISPPRV_PCR,
1459                     ISPPRV_PCR_EN | ISPPRV_PCR_ONESHOT);
1460 }
1461
1462 void omap3isp_preview_isr_frame_sync(struct isp_prev_device *prev)
1463 {
1464         /*
1465          * If ISP_VIDEO_DMAQUEUE_QUEUED is set, DMA queue had an underrun
1466          * condition, the module was paused and now we have a buffer queued
1467          * on the output again. Restart the pipeline if running in continuous
1468          * mode.
1469          */
1470         if (prev->state == ISP_PIPELINE_STREAM_CONTINUOUS &&
1471             prev->video_out.dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED) {
1472                 preview_enable_oneshot(prev);
1473                 isp_video_dmaqueue_flags_clr(&prev->video_out);
1474         }
1475 }
1476
1477 static void preview_isr_buffer(struct isp_prev_device *prev)
1478 {
1479         struct isp_pipeline *pipe = to_isp_pipeline(&prev->subdev.entity);
1480         struct isp_buffer *buffer;
1481         int restart = 0;
1482
1483         if (prev->input == PREVIEW_INPUT_MEMORY) {
1484                 buffer = omap3isp_video_buffer_next(&prev->video_in);
1485                 if (buffer != NULL)
1486                         preview_set_inaddr(prev, buffer->dma);
1487                 pipe->state |= ISP_PIPELINE_IDLE_INPUT;
1488         }
1489
1490         if (prev->output & PREVIEW_OUTPUT_MEMORY) {
1491                 buffer = omap3isp_video_buffer_next(&prev->video_out);
1492                 if (buffer != NULL) {
1493                         preview_set_outaddr(prev, buffer->dma);
1494                         restart = 1;
1495                 }
1496                 pipe->state |= ISP_PIPELINE_IDLE_OUTPUT;
1497         }
1498
1499         switch (prev->state) {
1500         case ISP_PIPELINE_STREAM_SINGLESHOT:
1501                 if (isp_pipeline_ready(pipe))
1502                         omap3isp_pipeline_set_stream(pipe,
1503                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
1504                 break;
1505
1506         case ISP_PIPELINE_STREAM_CONTINUOUS:
1507                 /* If an underrun occurs, the video queue operation handler will
1508                  * restart the preview engine. Otherwise restart it immediately.
1509                  */
1510                 if (restart)
1511                         preview_enable_oneshot(prev);
1512                 break;
1513
1514         case ISP_PIPELINE_STREAM_STOPPED:
1515         default:
1516                 return;
1517         }
1518 }
1519
1520 /*
1521  * omap3isp_preview_isr - ISP preview engine interrupt handler
1522  *
1523  * Manage the preview engine video buffers and configure shadowed registers.
1524  */
1525 void omap3isp_preview_isr(struct isp_prev_device *prev)
1526 {
1527         unsigned long flags;
1528         u32 update;
1529         u32 active;
1530
1531         if (omap3isp_module_sync_is_stopping(&prev->wait, &prev->stopping))
1532                 return;
1533
1534         spin_lock_irqsave(&prev->params.lock, flags);
1535         preview_params_switch(prev);
1536         update = preview_params_lock(prev, 0, false);
1537         active = prev->params.active;
1538         spin_unlock_irqrestore(&prev->params.lock, flags);
1539
1540         preview_setup_hw(prev, update, active);
1541         preview_config_input_size(prev, active);
1542
1543         if (prev->input == PREVIEW_INPUT_MEMORY ||
1544             prev->output & PREVIEW_OUTPUT_MEMORY)
1545                 preview_isr_buffer(prev);
1546         else if (prev->state == ISP_PIPELINE_STREAM_CONTINUOUS)
1547                 preview_enable_oneshot(prev);
1548
1549         spin_lock_irqsave(&prev->params.lock, flags);
1550         preview_params_unlock(prev, update, false);
1551         spin_unlock_irqrestore(&prev->params.lock, flags);
1552 }
1553
1554 /* -----------------------------------------------------------------------------
1555  * ISP video operations
1556  */
1557
1558 static int preview_video_queue(struct isp_video *video,
1559                                struct isp_buffer *buffer)
1560 {
1561         struct isp_prev_device *prev = &video->isp->isp_prev;
1562
1563         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1564                 preview_set_inaddr(prev, buffer->dma);
1565
1566         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1567                 preview_set_outaddr(prev, buffer->dma);
1568
1569         return 0;
1570 }
1571
1572 static const struct isp_video_operations preview_video_ops = {
1573         .queue = preview_video_queue,
1574 };
1575
1576 /* -----------------------------------------------------------------------------
1577  * V4L2 subdev operations
1578  */
1579
1580 /*
1581  * preview_s_ctrl - Handle set control subdev method
1582  * @ctrl: pointer to v4l2 control structure
1583  */
1584 static int preview_s_ctrl(struct v4l2_ctrl *ctrl)
1585 {
1586         struct isp_prev_device *prev =
1587                 container_of(ctrl->handler, struct isp_prev_device, ctrls);
1588
1589         switch (ctrl->id) {
1590         case V4L2_CID_BRIGHTNESS:
1591                 preview_update_brightness(prev, ctrl->val);
1592                 break;
1593         case V4L2_CID_CONTRAST:
1594                 preview_update_contrast(prev, ctrl->val);
1595                 break;
1596         }
1597
1598         return 0;
1599 }
1600
1601 static const struct v4l2_ctrl_ops preview_ctrl_ops = {
1602         .s_ctrl = preview_s_ctrl,
1603 };
1604
1605 /*
1606  * preview_ioctl - Handle preview module private ioctl's
1607  * @sd: pointer to v4l2 subdev structure
1608  * @cmd: configuration command
1609  * @arg: configuration argument
1610  * return -EINVAL or zero on success
1611  */
1612 static long preview_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
1613 {
1614         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
1615
1616         switch (cmd) {
1617         case VIDIOC_OMAP3ISP_PRV_CFG:
1618                 return preview_config(prev, arg);
1619
1620         default:
1621                 return -ENOIOCTLCMD;
1622         }
1623 }
1624
1625 /*
1626  * preview_set_stream - Enable/Disable streaming on preview subdev
1627  * @sd    : pointer to v4l2 subdev structure
1628  * @enable: 1 == Enable, 0 == Disable
1629  * return -EINVAL or zero on success
1630  */
1631 static int preview_set_stream(struct v4l2_subdev *sd, int enable)
1632 {
1633         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
1634         struct isp_video *video_out = &prev->video_out;
1635         struct isp_device *isp = to_isp_device(prev);
1636         struct device *dev = to_device(prev);
1637
1638         if (prev->state == ISP_PIPELINE_STREAM_STOPPED) {
1639                 if (enable == ISP_PIPELINE_STREAM_STOPPED)
1640                         return 0;
1641
1642                 omap3isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_PREVIEW);
1643                 preview_configure(prev);
1644                 atomic_set(&prev->stopping, 0);
1645                 preview_print_status(prev);
1646         }
1647
1648         switch (enable) {
1649         case ISP_PIPELINE_STREAM_CONTINUOUS:
1650                 if (prev->output & PREVIEW_OUTPUT_MEMORY)
1651                         omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_PREVIEW_WRITE);
1652
1653                 if (video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED ||
1654                     !(prev->output & PREVIEW_OUTPUT_MEMORY))
1655                         preview_enable_oneshot(prev);
1656
1657                 isp_video_dmaqueue_flags_clr(video_out);
1658                 break;
1659
1660         case ISP_PIPELINE_STREAM_SINGLESHOT:
1661                 if (prev->input == PREVIEW_INPUT_MEMORY)
1662                         omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_PREVIEW_READ);
1663                 if (prev->output & PREVIEW_OUTPUT_MEMORY)
1664                         omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_PREVIEW_WRITE);
1665
1666                 preview_enable_oneshot(prev);
1667                 break;
1668
1669         case ISP_PIPELINE_STREAM_STOPPED:
1670                 if (omap3isp_module_sync_idle(&sd->entity, &prev->wait,
1671                                               &prev->stopping))
1672                         dev_dbg(dev, "%s: stop timeout.\n", sd->name);
1673                 omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_PREVIEW_READ);
1674                 omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_PREVIEW_WRITE);
1675                 omap3isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_PREVIEW);
1676                 isp_video_dmaqueue_flags_clr(video_out);
1677                 break;
1678         }
1679
1680         prev->state = enable;
1681         return 0;
1682 }
1683
1684 static struct v4l2_mbus_framefmt *
1685 __preview_get_format(struct isp_prev_device *prev, struct v4l2_subdev_pad_config *cfg,
1686                      unsigned int pad, enum v4l2_subdev_format_whence which)
1687 {
1688         if (which == V4L2_SUBDEV_FORMAT_TRY)
1689                 return v4l2_subdev_get_try_format(&prev->subdev, cfg, pad);
1690         else
1691                 return &prev->formats[pad];
1692 }
1693
1694 static struct v4l2_rect *
1695 __preview_get_crop(struct isp_prev_device *prev, struct v4l2_subdev_pad_config *cfg,
1696                    enum v4l2_subdev_format_whence which)
1697 {
1698         if (which == V4L2_SUBDEV_FORMAT_TRY)
1699                 return v4l2_subdev_get_try_crop(&prev->subdev, cfg, PREV_PAD_SINK);
1700         else
1701                 return &prev->crop;
1702 }
1703
1704 /* previewer format descriptions */
1705 static const unsigned int preview_input_fmts[] = {
1706         MEDIA_BUS_FMT_Y8_1X8,
1707         MEDIA_BUS_FMT_SGRBG8_1X8,
1708         MEDIA_BUS_FMT_SRGGB8_1X8,
1709         MEDIA_BUS_FMT_SBGGR8_1X8,
1710         MEDIA_BUS_FMT_SGBRG8_1X8,
1711         MEDIA_BUS_FMT_Y10_1X10,
1712         MEDIA_BUS_FMT_SGRBG10_1X10,
1713         MEDIA_BUS_FMT_SRGGB10_1X10,
1714         MEDIA_BUS_FMT_SBGGR10_1X10,
1715         MEDIA_BUS_FMT_SGBRG10_1X10,
1716 };
1717
1718 static const unsigned int preview_output_fmts[] = {
1719         MEDIA_BUS_FMT_UYVY8_1X16,
1720         MEDIA_BUS_FMT_YUYV8_1X16,
1721 };
1722
1723 /*
1724  * preview_try_format - Validate a format
1725  * @prev: ISP preview engine
1726  * @cfg: V4L2 subdev pad configuration
1727  * @pad: pad number
1728  * @fmt: format to be validated
1729  * @which: try/active format selector
1730  *
1731  * Validate and adjust the given format for the given pad based on the preview
1732  * engine limits and the format and crop rectangles on other pads.
1733  */
1734 static void preview_try_format(struct isp_prev_device *prev,
1735                                struct v4l2_subdev_pad_config *cfg, unsigned int pad,
1736                                struct v4l2_mbus_framefmt *fmt,
1737                                enum v4l2_subdev_format_whence which)
1738 {
1739         u32 pixelcode;
1740         struct v4l2_rect *crop;
1741         unsigned int i;
1742
1743         switch (pad) {
1744         case PREV_PAD_SINK:
1745                 /* When reading data from the CCDC, the input size has already
1746                  * been mangled by the CCDC output pad so it can be accepted
1747                  * as-is.
1748                  *
1749                  * When reading data from memory, clamp the requested width and
1750                  * height. The TRM doesn't specify a minimum input height, make
1751                  * sure we got enough lines to enable the noise filter and color
1752                  * filter array interpolation.
1753                  */
1754                 if (prev->input == PREVIEW_INPUT_MEMORY) {
1755                         fmt->width = clamp_t(u32, fmt->width, PREV_MIN_IN_WIDTH,
1756                                              preview_max_out_width(prev));
1757                         fmt->height = clamp_t(u32, fmt->height,
1758                                               PREV_MIN_IN_HEIGHT,
1759                                               PREV_MAX_IN_HEIGHT);
1760                 }
1761
1762                 fmt->colorspace = V4L2_COLORSPACE_SRGB;
1763
1764                 for (i = 0; i < ARRAY_SIZE(preview_input_fmts); i++) {
1765                         if (fmt->code == preview_input_fmts[i])
1766                                 break;
1767                 }
1768
1769                 /* If not found, use SGRBG10 as default */
1770                 if (i >= ARRAY_SIZE(preview_input_fmts))
1771                         fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
1772                 break;
1773
1774         case PREV_PAD_SOURCE:
1775                 pixelcode = fmt->code;
1776                 *fmt = *__preview_get_format(prev, cfg, PREV_PAD_SINK, which);
1777
1778                 switch (pixelcode) {
1779                 case MEDIA_BUS_FMT_YUYV8_1X16:
1780                 case MEDIA_BUS_FMT_UYVY8_1X16:
1781                         fmt->code = pixelcode;
1782                         break;
1783
1784                 default:
1785                         fmt->code = MEDIA_BUS_FMT_YUYV8_1X16;
1786                         break;
1787                 }
1788
1789                 /* The preview module output size is configurable through the
1790                  * averager (horizontal scaling by 1/1, 1/2, 1/4 or 1/8). This
1791                  * is not supported yet, hardcode the output size to the crop
1792                  * rectangle size.
1793                  */
1794                 crop = __preview_get_crop(prev, cfg, which);
1795                 fmt->width = crop->width;
1796                 fmt->height = crop->height;
1797
1798                 fmt->colorspace = V4L2_COLORSPACE_JPEG;
1799                 break;
1800         }
1801
1802         fmt->field = V4L2_FIELD_NONE;
1803 }
1804
1805 /*
1806  * preview_try_crop - Validate a crop rectangle
1807  * @prev: ISP preview engine
1808  * @sink: format on the sink pad
1809  * @crop: crop rectangle to be validated
1810  *
1811  * The preview engine crops lines and columns for its internal operation,
1812  * depending on which filters are enabled. Enforce minimum crop margins to
1813  * handle that transparently for userspace.
1814  *
1815  * See the explanation at the PREV_MARGIN_* definitions for more details.
1816  */
1817 static void preview_try_crop(struct isp_prev_device *prev,
1818                              const struct v4l2_mbus_framefmt *sink,
1819                              struct v4l2_rect *crop)
1820 {
1821         unsigned int left = PREV_MARGIN_LEFT;
1822         unsigned int right = sink->width - PREV_MARGIN_RIGHT;
1823         unsigned int top = PREV_MARGIN_TOP;
1824         unsigned int bottom = sink->height - PREV_MARGIN_BOTTOM;
1825
1826         /* When processing data on-the-fly from the CCDC, at least 2 pixels must
1827          * be cropped from the left and right sides of the image. As we don't
1828          * know which filters will be enabled, increase the left and right
1829          * margins by two.
1830          */
1831         if (prev->input == PREVIEW_INPUT_CCDC) {
1832                 left += 2;
1833                 right -= 2;
1834         }
1835
1836         /* The CFA filter crops 4 lines and 4 columns in Bayer mode, and 2 lines
1837          * and no columns in other modes. Increase the margins based on the sink
1838          * format.
1839          */
1840         if (sink->code != MEDIA_BUS_FMT_Y8_1X8 &&
1841             sink->code != MEDIA_BUS_FMT_Y10_1X10) {
1842                 left += 2;
1843                 right -= 2;
1844                 top += 2;
1845                 bottom -= 2;
1846         }
1847
1848         /* Restrict left/top to even values to keep the Bayer pattern. */
1849         crop->left &= ~1;
1850         crop->top &= ~1;
1851
1852         crop->left = clamp_t(u32, crop->left, left, right - PREV_MIN_OUT_WIDTH);
1853         crop->top = clamp_t(u32, crop->top, top, bottom - PREV_MIN_OUT_HEIGHT);
1854         crop->width = clamp_t(u32, crop->width, PREV_MIN_OUT_WIDTH,
1855                               right - crop->left);
1856         crop->height = clamp_t(u32, crop->height, PREV_MIN_OUT_HEIGHT,
1857                                bottom - crop->top);
1858 }
1859
1860 /*
1861  * preview_enum_mbus_code - Handle pixel format enumeration
1862  * @sd     : pointer to v4l2 subdev structure
1863  * @cfg: V4L2 subdev pad configuration
1864  * @code   : pointer to v4l2_subdev_mbus_code_enum structure
1865  * return -EINVAL or zero on success
1866  */
1867 static int preview_enum_mbus_code(struct v4l2_subdev *sd,
1868                                   struct v4l2_subdev_pad_config *cfg,
1869                                   struct v4l2_subdev_mbus_code_enum *code)
1870 {
1871         switch (code->pad) {
1872         case PREV_PAD_SINK:
1873                 if (code->index >= ARRAY_SIZE(preview_input_fmts))
1874                         return -EINVAL;
1875
1876                 code->code = preview_input_fmts[code->index];
1877                 break;
1878         case PREV_PAD_SOURCE:
1879                 if (code->index >= ARRAY_SIZE(preview_output_fmts))
1880                         return -EINVAL;
1881
1882                 code->code = preview_output_fmts[code->index];
1883                 break;
1884         default:
1885                 return -EINVAL;
1886         }
1887
1888         return 0;
1889 }
1890
1891 static int preview_enum_frame_size(struct v4l2_subdev *sd,
1892                                    struct v4l2_subdev_pad_config *cfg,
1893                                    struct v4l2_subdev_frame_size_enum *fse)
1894 {
1895         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
1896         struct v4l2_mbus_framefmt format;
1897
1898         if (fse->index != 0)
1899                 return -EINVAL;
1900
1901         format.code = fse->code;
1902         format.width = 1;
1903         format.height = 1;
1904         preview_try_format(prev, cfg, fse->pad, &format, fse->which);
1905         fse->min_width = format.width;
1906         fse->min_height = format.height;
1907
1908         if (format.code != fse->code)
1909                 return -EINVAL;
1910
1911         format.code = fse->code;
1912         format.width = -1;
1913         format.height = -1;
1914         preview_try_format(prev, cfg, fse->pad, &format, fse->which);
1915         fse->max_width = format.width;
1916         fse->max_height = format.height;
1917
1918         return 0;
1919 }
1920
1921 /*
1922  * preview_get_selection - Retrieve a selection rectangle on a pad
1923  * @sd: ISP preview V4L2 subdevice
1924  * @cfg: V4L2 subdev pad configuration
1925  * @sel: Selection rectangle
1926  *
1927  * The only supported rectangles are the crop rectangles on the sink pad.
1928  *
1929  * Return 0 on success or a negative error code otherwise.
1930  */
1931 static int preview_get_selection(struct v4l2_subdev *sd,
1932                                  struct v4l2_subdev_pad_config *cfg,
1933                                  struct v4l2_subdev_selection *sel)
1934 {
1935         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
1936         struct v4l2_mbus_framefmt *format;
1937
1938         if (sel->pad != PREV_PAD_SINK)
1939                 return -EINVAL;
1940
1941         switch (sel->target) {
1942         case V4L2_SEL_TGT_CROP_BOUNDS:
1943                 sel->r.left = 0;
1944                 sel->r.top = 0;
1945                 sel->r.width = INT_MAX;
1946                 sel->r.height = INT_MAX;
1947
1948                 format = __preview_get_format(prev, cfg, PREV_PAD_SINK,
1949                                               sel->which);
1950                 preview_try_crop(prev, format, &sel->r);
1951                 break;
1952
1953         case V4L2_SEL_TGT_CROP:
1954                 sel->r = *__preview_get_crop(prev, cfg, sel->which);
1955                 break;
1956
1957         default:
1958                 return -EINVAL;
1959         }
1960
1961         return 0;
1962 }
1963
1964 /*
1965  * preview_set_selection - Set a selection rectangle on a pad
1966  * @sd: ISP preview V4L2 subdevice
1967  * @cfg: V4L2 subdev pad configuration
1968  * @sel: Selection rectangle
1969  *
1970  * The only supported rectangle is the actual crop rectangle on the sink pad.
1971  *
1972  * Return 0 on success or a negative error code otherwise.
1973  */
1974 static int preview_set_selection(struct v4l2_subdev *sd,
1975                                  struct v4l2_subdev_pad_config *cfg,
1976                                  struct v4l2_subdev_selection *sel)
1977 {
1978         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
1979         struct v4l2_mbus_framefmt *format;
1980
1981         if (sel->target != V4L2_SEL_TGT_CROP ||
1982             sel->pad != PREV_PAD_SINK)
1983                 return -EINVAL;
1984
1985         /* The crop rectangle can't be changed while streaming. */
1986         if (prev->state != ISP_PIPELINE_STREAM_STOPPED)
1987                 return -EBUSY;
1988
1989         /* Modifying the crop rectangle always changes the format on the source
1990          * pad. If the KEEP_CONFIG flag is set, just return the current crop
1991          * rectangle.
1992          */
1993         if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1994                 sel->r = *__preview_get_crop(prev, cfg, sel->which);
1995                 return 0;
1996         }
1997
1998         format = __preview_get_format(prev, cfg, PREV_PAD_SINK, sel->which);
1999         preview_try_crop(prev, format, &sel->r);
2000         *__preview_get_crop(prev, cfg, sel->which) = sel->r;
2001
2002         /* Update the source format. */
2003         format = __preview_get_format(prev, cfg, PREV_PAD_SOURCE, sel->which);
2004         preview_try_format(prev, cfg, PREV_PAD_SOURCE, format, sel->which);
2005
2006         return 0;
2007 }
2008
2009 /*
2010  * preview_get_format - Handle get format by pads subdev method
2011  * @sd : pointer to v4l2 subdev structure
2012  * @cfg: V4L2 subdev pad configuration
2013  * @fmt: pointer to v4l2 subdev format structure
2014  * return -EINVAL or zero on success
2015  */
2016 static int preview_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
2017                               struct v4l2_subdev_format *fmt)
2018 {
2019         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
2020         struct v4l2_mbus_framefmt *format;
2021
2022         format = __preview_get_format(prev, cfg, fmt->pad, fmt->which);
2023         if (format == NULL)
2024                 return -EINVAL;
2025
2026         fmt->format = *format;
2027         return 0;
2028 }
2029
2030 /*
2031  * preview_set_format - Handle set format by pads subdev method
2032  * @sd : pointer to v4l2 subdev structure
2033  * @cfg: V4L2 subdev pad configuration
2034  * @fmt: pointer to v4l2 subdev format structure
2035  * return -EINVAL or zero on success
2036  */
2037 static int preview_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
2038                               struct v4l2_subdev_format *fmt)
2039 {
2040         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
2041         struct v4l2_mbus_framefmt *format;
2042         struct v4l2_rect *crop;
2043
2044         format = __preview_get_format(prev, cfg, fmt->pad, fmt->which);
2045         if (format == NULL)
2046                 return -EINVAL;
2047
2048         preview_try_format(prev, cfg, fmt->pad, &fmt->format, fmt->which);
2049         *format = fmt->format;
2050
2051         /* Propagate the format from sink to source */
2052         if (fmt->pad == PREV_PAD_SINK) {
2053                 /* Reset the crop rectangle. */
2054                 crop = __preview_get_crop(prev, cfg, fmt->which);
2055                 crop->left = 0;
2056                 crop->top = 0;
2057                 crop->width = fmt->format.width;
2058                 crop->height = fmt->format.height;
2059
2060                 preview_try_crop(prev, &fmt->format, crop);
2061
2062                 /* Update the source format. */
2063                 format = __preview_get_format(prev, cfg, PREV_PAD_SOURCE,
2064                                               fmt->which);
2065                 preview_try_format(prev, cfg, PREV_PAD_SOURCE, format,
2066                                    fmt->which);
2067         }
2068
2069         return 0;
2070 }
2071
2072 /*
2073  * preview_init_formats - Initialize formats on all pads
2074  * @sd: ISP preview V4L2 subdevice
2075  * @fh: V4L2 subdev file handle
2076  *
2077  * Initialize all pad formats with default values. If fh is not NULL, try
2078  * formats are initialized on the file handle. Otherwise active formats are
2079  * initialized on the device.
2080  */
2081 static int preview_init_formats(struct v4l2_subdev *sd,
2082                                 struct v4l2_subdev_fh *fh)
2083 {
2084         struct v4l2_subdev_format format;
2085
2086         memset(&format, 0, sizeof(format));
2087         format.pad = PREV_PAD_SINK;
2088         format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
2089         format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
2090         format.format.width = 4096;
2091         format.format.height = 4096;
2092         preview_set_format(sd, fh ? fh->pad : NULL, &format);
2093
2094         return 0;
2095 }
2096
2097 /* subdev core operations */
2098 static const struct v4l2_subdev_core_ops preview_v4l2_core_ops = {
2099         .ioctl = preview_ioctl,
2100 };
2101
2102 /* subdev video operations */
2103 static const struct v4l2_subdev_video_ops preview_v4l2_video_ops = {
2104         .s_stream = preview_set_stream,
2105 };
2106
2107 /* subdev pad operations */
2108 static const struct v4l2_subdev_pad_ops preview_v4l2_pad_ops = {
2109         .enum_mbus_code = preview_enum_mbus_code,
2110         .enum_frame_size = preview_enum_frame_size,
2111         .get_fmt = preview_get_format,
2112         .set_fmt = preview_set_format,
2113         .get_selection = preview_get_selection,
2114         .set_selection = preview_set_selection,
2115 };
2116
2117 /* subdev operations */
2118 static const struct v4l2_subdev_ops preview_v4l2_ops = {
2119         .core = &preview_v4l2_core_ops,
2120         .video = &preview_v4l2_video_ops,
2121         .pad = &preview_v4l2_pad_ops,
2122 };
2123
2124 /* subdev internal operations */
2125 static const struct v4l2_subdev_internal_ops preview_v4l2_internal_ops = {
2126         .open = preview_init_formats,
2127 };
2128
2129 /* -----------------------------------------------------------------------------
2130  * Media entity operations
2131  */
2132
2133 /*
2134  * preview_link_setup - Setup previewer connections.
2135  * @entity : Pointer to media entity structure
2136  * @local  : Pointer to local pad array
2137  * @remote : Pointer to remote pad array
2138  * @flags  : Link flags
2139  * return -EINVAL or zero on success
2140  */
2141 static int preview_link_setup(struct media_entity *entity,
2142                               const struct media_pad *local,
2143                               const struct media_pad *remote, u32 flags)
2144 {
2145         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
2146         struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
2147
2148         switch (local->index | media_entity_type(remote->entity)) {
2149         case PREV_PAD_SINK | MEDIA_ENT_T_DEVNODE:
2150                 /* read from memory */
2151                 if (flags & MEDIA_LNK_FL_ENABLED) {
2152                         if (prev->input == PREVIEW_INPUT_CCDC)
2153                                 return -EBUSY;
2154                         prev->input = PREVIEW_INPUT_MEMORY;
2155                 } else {
2156                         if (prev->input == PREVIEW_INPUT_MEMORY)
2157                                 prev->input = PREVIEW_INPUT_NONE;
2158                 }
2159                 break;
2160
2161         case PREV_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
2162                 /* read from ccdc */
2163                 if (flags & MEDIA_LNK_FL_ENABLED) {
2164                         if (prev->input == PREVIEW_INPUT_MEMORY)
2165                                 return -EBUSY;
2166                         prev->input = PREVIEW_INPUT_CCDC;
2167                 } else {
2168                         if (prev->input == PREVIEW_INPUT_CCDC)
2169                                 prev->input = PREVIEW_INPUT_NONE;
2170                 }
2171                 break;
2172
2173         /*
2174          * The ISP core doesn't support pipelines with multiple video outputs.
2175          * Revisit this when it will be implemented, and return -EBUSY for now.
2176          */
2177
2178         case PREV_PAD_SOURCE | MEDIA_ENT_T_DEVNODE:
2179                 /* write to memory */
2180                 if (flags & MEDIA_LNK_FL_ENABLED) {
2181                         if (prev->output & ~PREVIEW_OUTPUT_MEMORY)
2182                                 return -EBUSY;
2183                         prev->output |= PREVIEW_OUTPUT_MEMORY;
2184                 } else {
2185                         prev->output &= ~PREVIEW_OUTPUT_MEMORY;
2186                 }
2187                 break;
2188
2189         case PREV_PAD_SOURCE | MEDIA_ENT_T_V4L2_SUBDEV:
2190                 /* write to resizer */
2191                 if (flags & MEDIA_LNK_FL_ENABLED) {
2192                         if (prev->output & ~PREVIEW_OUTPUT_RESIZER)
2193                                 return -EBUSY;
2194                         prev->output |= PREVIEW_OUTPUT_RESIZER;
2195                 } else {
2196                         prev->output &= ~PREVIEW_OUTPUT_RESIZER;
2197                 }
2198                 break;
2199
2200         default:
2201                 return -EINVAL;
2202         }
2203
2204         return 0;
2205 }
2206
2207 /* media operations */
2208 static const struct media_entity_operations preview_media_ops = {
2209         .link_setup = preview_link_setup,
2210         .link_validate = v4l2_subdev_link_validate,
2211 };
2212
2213 void omap3isp_preview_unregister_entities(struct isp_prev_device *prev)
2214 {
2215         v4l2_device_unregister_subdev(&prev->subdev);
2216         omap3isp_video_unregister(&prev->video_in);
2217         omap3isp_video_unregister(&prev->video_out);
2218 }
2219
2220 int omap3isp_preview_register_entities(struct isp_prev_device *prev,
2221         struct v4l2_device *vdev)
2222 {
2223         int ret;
2224
2225         /* Register the subdev and video nodes. */
2226         ret = v4l2_device_register_subdev(vdev, &prev->subdev);
2227         if (ret < 0)
2228                 goto error;
2229
2230         ret = omap3isp_video_register(&prev->video_in, vdev);
2231         if (ret < 0)
2232                 goto error;
2233
2234         ret = omap3isp_video_register(&prev->video_out, vdev);
2235         if (ret < 0)
2236                 goto error;
2237
2238         return 0;
2239
2240 error:
2241         omap3isp_preview_unregister_entities(prev);
2242         return ret;
2243 }
2244
2245 /* -----------------------------------------------------------------------------
2246  * ISP previewer initialisation and cleanup
2247  */
2248
2249 /*
2250  * preview_init_entities - Initialize subdev and media entity.
2251  * @prev : Pointer to preview structure
2252  * return -ENOMEM or zero on success
2253  */
2254 static int preview_init_entities(struct isp_prev_device *prev)
2255 {
2256         struct v4l2_subdev *sd = &prev->subdev;
2257         struct media_pad *pads = prev->pads;
2258         struct media_entity *me = &sd->entity;
2259         int ret;
2260
2261         prev->input = PREVIEW_INPUT_NONE;
2262
2263         v4l2_subdev_init(sd, &preview_v4l2_ops);
2264         sd->internal_ops = &preview_v4l2_internal_ops;
2265         strlcpy(sd->name, "OMAP3 ISP preview", sizeof(sd->name));
2266         sd->grp_id = 1 << 16;   /* group ID for isp subdevs */
2267         v4l2_set_subdevdata(sd, prev);
2268         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
2269
2270         v4l2_ctrl_handler_init(&prev->ctrls, 2);
2271         v4l2_ctrl_new_std(&prev->ctrls, &preview_ctrl_ops, V4L2_CID_BRIGHTNESS,
2272                           ISPPRV_BRIGHT_LOW, ISPPRV_BRIGHT_HIGH,
2273                           ISPPRV_BRIGHT_STEP, ISPPRV_BRIGHT_DEF);
2274         v4l2_ctrl_new_std(&prev->ctrls, &preview_ctrl_ops, V4L2_CID_CONTRAST,
2275                           ISPPRV_CONTRAST_LOW, ISPPRV_CONTRAST_HIGH,
2276                           ISPPRV_CONTRAST_STEP, ISPPRV_CONTRAST_DEF);
2277         v4l2_ctrl_handler_setup(&prev->ctrls);
2278         sd->ctrl_handler = &prev->ctrls;
2279
2280         pads[PREV_PAD_SINK].flags = MEDIA_PAD_FL_SINK
2281                                     | MEDIA_PAD_FL_MUST_CONNECT;
2282         pads[PREV_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
2283
2284         me->ops = &preview_media_ops;
2285         ret = media_entity_init(me, PREV_PADS_NUM, pads, 0);
2286         if (ret < 0)
2287                 return ret;
2288
2289         preview_init_formats(sd, NULL);
2290
2291         /* According to the OMAP34xx TRM, video buffers need to be aligned on a
2292          * 32 bytes boundary. However, an undocumented hardware bug requires a
2293          * 64 bytes boundary at the preview engine input.
2294          */
2295         prev->video_in.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2296         prev->video_in.ops = &preview_video_ops;
2297         prev->video_in.isp = to_isp_device(prev);
2298         prev->video_in.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
2299         prev->video_in.bpl_alignment = 64;
2300         prev->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2301         prev->video_out.ops = &preview_video_ops;
2302         prev->video_out.isp = to_isp_device(prev);
2303         prev->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
2304         prev->video_out.bpl_alignment = 32;
2305
2306         ret = omap3isp_video_init(&prev->video_in, "preview");
2307         if (ret < 0)
2308                 goto error_video_in;
2309
2310         ret = omap3isp_video_init(&prev->video_out, "preview");
2311         if (ret < 0)
2312                 goto error_video_out;
2313
2314         /* Connect the video nodes to the previewer subdev. */
2315         ret = media_entity_create_link(&prev->video_in.video.entity, 0,
2316                         &prev->subdev.entity, PREV_PAD_SINK, 0);
2317         if (ret < 0)
2318                 goto error_link;
2319
2320         ret = media_entity_create_link(&prev->subdev.entity, PREV_PAD_SOURCE,
2321                         &prev->video_out.video.entity, 0, 0);
2322         if (ret < 0)
2323                 goto error_link;
2324
2325         return 0;
2326
2327 error_link:
2328         omap3isp_video_cleanup(&prev->video_out);
2329 error_video_out:
2330         omap3isp_video_cleanup(&prev->video_in);
2331 error_video_in:
2332         media_entity_cleanup(&prev->subdev.entity);
2333         return ret;
2334 }
2335
2336 /*
2337  * omap3isp_preview_init - Previewer initialization.
2338  * @isp : Pointer to ISP device
2339  * return -ENOMEM or zero on success
2340  */
2341 int omap3isp_preview_init(struct isp_device *isp)
2342 {
2343         struct isp_prev_device *prev = &isp->isp_prev;
2344
2345         init_waitqueue_head(&prev->wait);
2346
2347         preview_init_params(prev);
2348
2349         return preview_init_entities(prev);
2350 }
2351
2352 void omap3isp_preview_cleanup(struct isp_device *isp)
2353 {
2354         struct isp_prev_device *prev = &isp->isp_prev;
2355
2356         v4l2_ctrl_handler_free(&prev->ctrls);
2357         omap3isp_video_cleanup(&prev->video_in);
2358         omap3isp_video_cleanup(&prev->video_out);
2359         media_entity_cleanup(&prev->subdev.entity);
2360 }