kernel/drivers/media/platform/exynos-gsc/gsc-core.c

   1 /*
   2  * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com
   4  *
   5  * Samsung EXYNOS5 SoC series G-Scaler driver
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 2 of the License,
  10  * or (at your option) any later version.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/types.h>
  16 #include <linux/errno.h>
  17 #include <linux/bug.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/workqueue.h>
  20 #include <linux/device.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/list.h>
  23 #include <linux/io.h>
  24 #include <linux/slab.h>
  25 #include <linux/clk.h>
  26 #include <linux/of.h>
  27 #include <media/v4l2-ioctl.h>
  28
  29 #include "gsc-core.h"
  30
  31 #define GSC_CLOCK_GATE_NAME     "gscl"
  32
  33 static const struct gsc_fmt gsc_formats[] = {
  34         {
  35                 .name           = "RGB565",
  36                 .pixelformat    = V4L2_PIX_FMT_RGB565X,
  37                 .depth          = { 16 },
  38                 .color          = GSC_RGB,
  39                 .num_planes     = 1,
  40                 .num_comp       = 1,
  41         }, {
  42                 .name           = "XRGB-8-8-8-8, 32 bpp",
  43                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  44                 .depth          = { 32 },
  45                 .color          = GSC_RGB,
  46                 .num_planes     = 1,
  47                 .num_comp       = 1,
  48         }, {
  49                 .name           = "YUV 4:2:2 packed, YCbYCr",
  50                 .pixelformat    = V4L2_PIX_FMT_YUYV,
  51                 .depth          = { 16 },
  52                 .color          = GSC_YUV422,
  53                 .yorder         = GSC_LSB_Y,
  54                 .corder         = GSC_CBCR,
  55                 .num_planes     = 1,
  56                 .num_comp       = 1,
  57                 .mbus_code      = MEDIA_BUS_FMT_YUYV8_2X8,
  58         }, {
  59                 .name           = "YUV 4:2:2 packed, CbYCrY",
  60                 .pixelformat    = V4L2_PIX_FMT_UYVY,
  61                 .depth          = { 16 },
  62                 .color          = GSC_YUV422,
  63                 .yorder         = GSC_LSB_C,
  64                 .corder         = GSC_CBCR,
  65                 .num_planes     = 1,
  66                 .num_comp       = 1,
  67                 .mbus_code      = MEDIA_BUS_FMT_UYVY8_2X8,
  68         }, {
  69                 .name           = "YUV 4:2:2 packed, CrYCbY",
  70                 .pixelformat    = V4L2_PIX_FMT_VYUY,
  71                 .depth          = { 16 },
  72                 .color          = GSC_YUV422,
  73                 .yorder         = GSC_LSB_C,
  74                 .corder         = GSC_CRCB,
  75                 .num_planes     = 1,
  76                 .num_comp       = 1,
  77                 .mbus_code      = MEDIA_BUS_FMT_VYUY8_2X8,
  78         }, {
  79                 .name           = "YUV 4:2:2 packed, YCrYCb",
  80                 .pixelformat    = V4L2_PIX_FMT_YVYU,
  81                 .depth          = { 16 },
  82                 .color          = GSC_YUV422,
  83                 .yorder         = GSC_LSB_Y,
  84                 .corder         = GSC_CRCB,
  85                 .num_planes     = 1,
  86                 .num_comp       = 1,
  87                 .mbus_code      = MEDIA_BUS_FMT_YVYU8_2X8,
  88         }, {
  89                 .name           = "YUV 4:4:4 planar, YCbYCr",
  90                 .pixelformat    = V4L2_PIX_FMT_YUV32,
  91                 .depth          = { 32 },
  92                 .color          = GSC_YUV444,
  93                 .yorder         = GSC_LSB_Y,
  94                 .corder         = GSC_CBCR,
  95                 .num_planes     = 1,
  96                 .num_comp       = 1,
  97         }, {
  98                 .name           = "YUV 4:2:2 planar, Y/Cb/Cr",
  99                 .pixelformat    = V4L2_PIX_FMT_YUV422P,
 100                 .depth          = { 16 },
 101                 .color          = GSC_YUV422,
 102                 .yorder         = GSC_LSB_Y,
 103                 .corder         = GSC_CBCR,
 104                 .num_planes     = 1,
 105                 .num_comp       = 3,
 106         }, {
 107                 .name           = "YUV 4:2:2 planar, Y/CbCr",
 108                 .pixelformat    = V4L2_PIX_FMT_NV16,
 109                 .depth          = { 16 },
 110                 .color          = GSC_YUV422,
 111                 .yorder         = GSC_LSB_Y,
 112                 .corder         = GSC_CBCR,
 113                 .num_planes     = 1,
 114                 .num_comp       = 2,
 115         }, {
 116                 .name           = "YUV 4:2:2 planar, Y/CrCb",
 117                 .pixelformat    = V4L2_PIX_FMT_NV61,
 118                 .depth          = { 16 },
 119                 .color          = GSC_YUV422,
 120                 .yorder         = GSC_LSB_Y,
 121                 .corder         = GSC_CRCB,
 122                 .num_planes     = 1,
 123                 .num_comp       = 2,
 124         }, {
 125                 .name           = "YUV 4:2:0 planar, YCbCr",
 126                 .pixelformat    = V4L2_PIX_FMT_YUV420,
 127                 .depth          = { 12 },
 128                 .color          = GSC_YUV420,
 129                 .yorder         = GSC_LSB_Y,
 130                 .corder         = GSC_CBCR,
 131                 .num_planes     = 1,
 132                 .num_comp       = 3,
 133         }, {
 134                 .name           = "YUV 4:2:0 planar, YCrCb",
 135                 .pixelformat    = V4L2_PIX_FMT_YVU420,
 136                 .depth          = { 12 },
 137                 .color          = GSC_YUV420,
 138                 .yorder         = GSC_LSB_Y,
 139                 .corder         = GSC_CRCB,
 140                 .num_planes     = 1,
 141                 .num_comp       = 3,
 142
 143         }, {
 144                 .name           = "YUV 4:2:0 planar, Y/CbCr",
 145                 .pixelformat    = V4L2_PIX_FMT_NV12,
 146                 .depth          = { 12 },
 147                 .color          = GSC_YUV420,
 148                 .yorder         = GSC_LSB_Y,
 149                 .corder         = GSC_CBCR,
 150                 .num_planes     = 1,
 151                 .num_comp       = 2,
 152         }, {
 153                 .name           = "YUV 4:2:0 planar, Y/CrCb",
 154                 .pixelformat    = V4L2_PIX_FMT_NV21,
 155                 .depth          = { 12 },
 156                 .color          = GSC_YUV420,
 157                 .yorder         = GSC_LSB_Y,
 158                 .corder         = GSC_CRCB,
 159                 .num_planes     = 1,
 160                 .num_comp       = 2,
 161         }, {
 162                 .name           = "YUV 4:2:0 non-contig. 2p, Y/CbCr",
 163                 .pixelformat    = V4L2_PIX_FMT_NV12M,
 164                 .depth          = { 8, 4 },
 165                 .color          = GSC_YUV420,
 166                 .yorder         = GSC_LSB_Y,
 167                 .corder         = GSC_CBCR,
 168                 .num_planes     = 2,
 169                 .num_comp       = 2,
 170         }, {
 171                 .name           = "YUV 4:2:0 non-contig. 3p, Y/Cb/Cr",
 172                 .pixelformat    = V4L2_PIX_FMT_YUV420M,
 173                 .depth          = { 8, 2, 2 },
 174                 .color          = GSC_YUV420,
 175                 .yorder         = GSC_LSB_Y,
 176                 .corder         = GSC_CBCR,
 177                 .num_planes     = 3,
 178                 .num_comp       = 3,
 179         }, {
 180                 .name           = "YUV 4:2:0 non-contig. 3p, Y/Cr/Cb",
 181                 .pixelformat    = V4L2_PIX_FMT_YVU420M,
 182                 .depth          = { 8, 2, 2 },
 183                 .color          = GSC_YUV420,
 184                 .yorder         = GSC_LSB_Y,
 185                 .corder         = GSC_CRCB,
 186                 .num_planes     = 3,
 187                 .num_comp       = 3,
 188         }, {
 189                 .name           = "YUV 4:2:0 n.c. 2p, Y/CbCr tiled",
 190                 .pixelformat    = V4L2_PIX_FMT_NV12MT_16X16,
 191                 .depth          = { 8, 4 },
 192                 .color          = GSC_YUV420,
 193                 .yorder         = GSC_LSB_Y,
 194                 .corder         = GSC_CBCR,
 195                 .num_planes     = 2,
 196                 .num_comp       = 2,
 197         }
 198 };
 199
 200 const struct gsc_fmt *get_format(int index)
 201 {
 202         if (index >= ARRAY_SIZE(gsc_formats))
 203                 return NULL;
 204
 205         return (struct gsc_fmt *)&gsc_formats[index];
 206 }
 207
 208 const struct gsc_fmt *find_fmt(u32 *pixelformat, u32 *mbus_code, u32 index)
 209 {
 210         const struct gsc_fmt *fmt, *def_fmt = NULL;
 211         unsigned int i;
 212
 213         if (index >= ARRAY_SIZE(gsc_formats))
 214                 return NULL;
 215
 216         for (i = 0; i < ARRAY_SIZE(gsc_formats); ++i) {
 217                 fmt = get_format(i);
 218                 if (pixelformat && fmt->pixelformat == *pixelformat)
 219                         return fmt;
 220                 if (mbus_code && fmt->mbus_code == *mbus_code)
 221                         return fmt;
 222                 if (index == i)
 223                         def_fmt = fmt;
 224         }
 225         return def_fmt;
 226
 227 }
 228
 229 void gsc_set_frame_size(struct gsc_frame *frame, int width, int height)
 230 {
 231         frame->f_width  = width;
 232         frame->f_height = height;
 233         frame->crop.width = width;
 234         frame->crop.height = height;
 235         frame->crop.left = 0;
 236         frame->crop.top = 0;
 237 }
 238
 239 int gsc_cal_prescaler_ratio(struct gsc_variant *var, u32 src, u32 dst,
 240                                                                 u32 *ratio)
 241 {
 242         if ((dst > src) || (dst >= src / var->poly_sc_down_max)) {
 243                 *ratio = 1;
 244                 return 0;
 245         }
 246
 247         if ((src / var->poly_sc_down_max / var->pre_sc_down_max) > dst) {
 248                 pr_err("Exceeded maximum downscaling ratio (1/16))");
 249                 return -EINVAL;
 250         }
 251
 252         *ratio = (dst > (src / 8)) ? 2 : 4;
 253
 254         return 0;
 255 }
 256
 257 void gsc_get_prescaler_shfactor(u32 hratio, u32 vratio, u32 *sh)
 258 {
 259         if (hratio == 4 && vratio == 4)
 260                 *sh = 4;
 261         else if ((hratio == 4 && vratio == 2) ||
 262                  (hratio == 2 && vratio == 4))
 263                 *sh = 3;
 264         else if ((hratio == 4 && vratio == 1) ||
 265                  (hratio == 1 && vratio == 4) ||
 266                  (hratio == 2 && vratio == 2))
 267                 *sh = 2;
 268         else if (hratio == 1 && vratio == 1)
 269                 *sh = 0;
 270         else
 271                 *sh = 1;
 272 }
 273
 274 void gsc_check_src_scale_info(struct gsc_variant *var,
 275                                 struct gsc_frame *s_frame, u32 *wratio,
 276                                  u32 tx, u32 ty, u32 *hratio)
 277 {
 278         int remainder = 0, walign, halign;
 279
 280         if (is_yuv420(s_frame->fmt->color)) {
 281                 walign = GSC_SC_ALIGN_4;
 282                 halign = GSC_SC_ALIGN_4;
 283         } else if (is_yuv422(s_frame->fmt->color)) {
 284                 walign = GSC_SC_ALIGN_4;
 285                 halign = GSC_SC_ALIGN_2;
 286         } else {
 287                 walign = GSC_SC_ALIGN_2;
 288                 halign = GSC_SC_ALIGN_2;
 289         }
 290
 291         remainder = s_frame->crop.width % (*wratio * walign);
 292         if (remainder) {
 293                 s_frame->crop.width -= remainder;
 294                 gsc_cal_prescaler_ratio(var, s_frame->crop.width, tx, wratio);
 295                 pr_info("cropped src width size is recalculated from %d to %d",
 296                         s_frame->crop.width + remainder, s_frame->crop.width);
 297         }
 298
 299         remainder = s_frame->crop.height % (*hratio * halign);
 300         if (remainder) {
 301                 s_frame->crop.height -= remainder;
 302                 gsc_cal_prescaler_ratio(var, s_frame->crop.height, ty, hratio);
 303                 pr_info("cropped src height size is recalculated from %d to %d",
 304                         s_frame->crop.height + remainder, s_frame->crop.height);
 305         }
 306 }
 307
 308 int gsc_enum_fmt_mplane(struct v4l2_fmtdesc *f)
 309 {
 310         const struct gsc_fmt *fmt;
 311
 312         fmt = find_fmt(NULL, NULL, f->index);
 313         if (!fmt)
 314                 return -EINVAL;
 315
 316         strlcpy(f->description, fmt->name, sizeof(f->description));
 317         f->pixelformat = fmt->pixelformat;
 318
 319         return 0;
 320 }
 321
 322 static int get_plane_info(struct gsc_frame *frm, u32 addr, u32 *index, u32 *ret_addr)
 323 {
 324         if (frm->addr.y == addr) {
 325                 *index = 0;
 326                 *ret_addr = frm->addr.y;
 327         } else if (frm->addr.cb == addr) {
 328                 *index = 1;
 329                 *ret_addr = frm->addr.cb;
 330         } else if (frm->addr.cr == addr) {
 331                 *index = 2;
 332                 *ret_addr = frm->addr.cr;
 333         } else {
 334                 pr_err("Plane address is wrong");
 335                 return -EINVAL;
 336         }
 337         return 0;
 338 }
 339
 340 void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm)
 341 {
 342         u32 f_chk_addr, f_chk_len, s_chk_addr, s_chk_len;
 343         f_chk_addr = f_chk_len = s_chk_addr = s_chk_len = 0;
 344
 345         f_chk_addr = frm->addr.y;
 346         f_chk_len = frm->payload[0];
 347         if (frm->fmt->num_planes == 2) {
 348                 s_chk_addr = frm->addr.cb;
 349                 s_chk_len = frm->payload[1];
 350         } else if (frm->fmt->num_planes == 3) {
 351                 u32 low_addr, low_plane, mid_addr, mid_plane;
 352                 u32 high_addr, high_plane;
 353                 u32 t_min, t_max;
 354
 355                 t_min = min3(frm->addr.y, frm->addr.cb, frm->addr.cr);
 356                 if (get_plane_info(frm, t_min, &low_plane, &low_addr))
 357                         return;
 358                 t_max = max3(frm->addr.y, frm->addr.cb, frm->addr.cr);
 359                 if (get_plane_info(frm, t_max, &high_plane, &high_addr))
 360                         return;
 361
 362                 mid_plane = 3 - (low_plane + high_plane);
 363                 if (mid_plane == 0)
 364                         mid_addr = frm->addr.y;
 365                 else if (mid_plane == 1)
 366                         mid_addr = frm->addr.cb;
 367                 else if (mid_plane == 2)
 368                         mid_addr = frm->addr.cr;
 369                 else
 370                         return;
 371
 372                 f_chk_addr = low_addr;
 373                 if (mid_addr + frm->payload[mid_plane] - low_addr >
 374                     high_addr + frm->payload[high_plane] - mid_addr) {
 375                         f_chk_len = frm->payload[low_plane];
 376                         s_chk_addr = mid_addr;
 377                         s_chk_len = high_addr +
 378                                         frm->payload[high_plane] - mid_addr;
 379                 } else {
 380                         f_chk_len = mid_addr +
 381                                         frm->payload[mid_plane] - low_addr;
 382                         s_chk_addr = high_addr;
 383                         s_chk_len = frm->payload[high_plane];
 384                 }
 385         }
 386         pr_debug("f_addr = 0x%08x, f_len = %d, s_addr = 0x%08x, s_len = %d\n",
 387                         f_chk_addr, f_chk_len, s_chk_addr, s_chk_len);
 388 }
 389
 390 int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 391 {
 392         struct gsc_dev *gsc = ctx->gsc_dev;
 393         struct gsc_variant *variant = gsc->variant;
 394         struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 395         const struct gsc_fmt *fmt;
 396         u32 max_w, max_h, mod_x, mod_y;
 397         u32 min_w, min_h, tmp_w, tmp_h;
 398         int i;
 399
 400         pr_debug("user put w: %d, h: %d", pix_mp->width, pix_mp->height);
 401
 402         fmt = find_fmt(&pix_mp->pixelformat, NULL, 0);
 403         if (!fmt) {
 404                 pr_err("pixelformat format (0x%X) invalid\n",
 405                                                 pix_mp->pixelformat);
 406                 return -EINVAL;
 407         }
 408
 409         if (pix_mp->field == V4L2_FIELD_ANY)
 410                 pix_mp->field = V4L2_FIELD_NONE;
 411         else if (pix_mp->field != V4L2_FIELD_NONE) {
 412                 pr_err("Not supported field order(%d)\n", pix_mp->field);
 413                 return -EINVAL;
 414         }
 415
 416         max_w = variant->pix_max->target_rot_dis_w;
 417         max_h = variant->pix_max->target_rot_dis_h;
 418
 419         mod_x = ffs(variant->pix_align->org_w) - 1;
 420         if (is_yuv420(fmt->color))
 421                 mod_y = ffs(variant->pix_align->org_h) - 1;
 422         else
 423                 mod_y = ffs(variant->pix_align->org_h) - 2;
 424
 425         if (V4L2_TYPE_IS_OUTPUT(f->type)) {
 426                 min_w = variant->pix_min->org_w;
 427                 min_h = variant->pix_min->org_h;
 428         } else {
 429                 min_w = variant->pix_min->target_rot_dis_w;
 430                 min_h = variant->pix_min->target_rot_dis_h;
 431         }
 432
 433         pr_debug("mod_x: %d, mod_y: %d, max_w: %d, max_h = %d",
 434                         mod_x, mod_y, max_w, max_h);
 435
 436         /* To check if image size is modified to adjust parameter against
 437            hardware abilities */
 438         tmp_w = pix_mp->width;
 439         tmp_h = pix_mp->height;
 440
 441         v4l_bound_align_image(&pix_mp->width, min_w, max_w, mod_x,
 442                 &pix_mp->height, min_h, max_h, mod_y, 0);
 443         if (tmp_w != pix_mp->width || tmp_h != pix_mp->height)
 444                 pr_info("Image size has been modified from %dx%d to %dx%d",
 445                          tmp_w, tmp_h, pix_mp->width, pix_mp->height);
 446
 447         pix_mp->num_planes = fmt->num_planes;
 448
 449         if (pix_mp->width >= 1280) /* HD */
 450                 pix_mp->colorspace = V4L2_COLORSPACE_REC709;
 451         else /* SD */
 452                 pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
 453
 454
 455         for (i = 0; i < pix_mp->num_planes; ++i) {
 456                 int bpl = (pix_mp->width * fmt->depth[i]) >> 3;
 457                 pix_mp->plane_fmt[i].bytesperline = bpl;
 458                 pix_mp->plane_fmt[i].sizeimage = bpl * pix_mp->height;
 459
 460                 pr_debug("[%d]: bpl: %d, sizeimage: %d",
 461                                 i, bpl, pix_mp->plane_fmt[i].sizeimage);
 462         }
 463
 464         return 0;
 465 }
 466
 467 int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 468 {
 469         struct gsc_frame *frame;
 470         struct v4l2_pix_format_mplane *pix_mp;
 471         int i;
 472
 473         frame = ctx_get_frame(ctx, f->type);
 474         if (IS_ERR(frame))
 475                 return PTR_ERR(frame);
 476
 477         pix_mp = &f->fmt.pix_mp;
 478
 479         pix_mp->width           = frame->f_width;
 480         pix_mp->height          = frame->f_height;
 481         pix_mp->field           = V4L2_FIELD_NONE;
 482         pix_mp->pixelformat     = frame->fmt->pixelformat;
 483         pix_mp->colorspace      = V4L2_COLORSPACE_REC709;
 484         pix_mp->num_planes      = frame->fmt->num_planes;
 485
 486         for (i = 0; i < pix_mp->num_planes; ++i) {
 487                 pix_mp->plane_fmt[i].bytesperline = (frame->f_width *
 488                         frame->fmt->depth[i]) / 8;
 489                 pix_mp->plane_fmt[i].sizeimage =
 490                          pix_mp->plane_fmt[i].bytesperline * frame->f_height;
 491         }
 492
 493         return 0;
 494 }
 495
 496 void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h)
 497 {
 498         if (tmp_w != *w || tmp_h != *h) {
 499                 pr_info("Cropped size has been modified from %dx%d to %dx%d",
 500                                                         *w, *h, tmp_w, tmp_h);
 501                 *w = tmp_w;
 502                 *h = tmp_h;
 503         }
 504 }
 505
 506 int gsc_g_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
 507 {
 508         struct gsc_frame *frame;
 509
 510         frame = ctx_get_frame(ctx, cr->type);
 511         if (IS_ERR(frame))
 512                 return PTR_ERR(frame);
 513
 514         cr->c = frame->crop;
 515
 516         return 0;
 517 }
 518
 519 int gsc_try_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
 520 {
 521         struct gsc_frame *f;
 522         struct gsc_dev *gsc = ctx->gsc_dev;
 523         struct gsc_variant *variant = gsc->variant;
 524         u32 mod_x = 0, mod_y = 0, tmp_w, tmp_h;
 525         u32 min_w, min_h, max_w, max_h;
 526
 527         if (cr->c.top < 0 || cr->c.left < 0) {
 528                 pr_err("doesn't support negative values for top & left\n");
 529                 return -EINVAL;
 530         }
 531         pr_debug("user put w: %d, h: %d", cr->c.width, cr->c.height);
 532
 533         if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 534                 f = &ctx->d_frame;
 535         else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 536                 f = &ctx->s_frame;
 537         else
 538                 return -EINVAL;
 539
 540         max_w = f->f_width;
 541         max_h = f->f_height;
 542         tmp_w = cr->c.width;
 543         tmp_h = cr->c.height;
 544
 545         if (V4L2_TYPE_IS_OUTPUT(cr->type)) {
 546                 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 1) ||
 547                     is_rgb(f->fmt->color))
 548                         min_w = 32;
 549                 else
 550                         min_w = 64;
 551                 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 3) ||
 552                     is_yuv420(f->fmt->color))
 553                         min_h = 32;
 554                 else
 555                         min_h = 16;
 556         } else {
 557                 if (is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color))
 558                         mod_x = ffs(variant->pix_align->target_w) - 1;
 559                 if (is_yuv420(f->fmt->color))
 560                         mod_y = ffs(variant->pix_align->target_h) - 1;
 561                 if (ctx->gsc_ctrls.rotate->val == 90 ||
 562                     ctx->gsc_ctrls.rotate->val == 270) {
 563                         max_w = f->f_height;
 564                         max_h = f->f_width;
 565                         min_w = variant->pix_min->target_rot_en_w;
 566                         min_h = variant->pix_min->target_rot_en_h;
 567                         tmp_w = cr->c.height;
 568                         tmp_h = cr->c.width;
 569                 } else {
 570                         min_w = variant->pix_min->target_rot_dis_w;
 571                         min_h = variant->pix_min->target_rot_dis_h;
 572                 }
 573         }
 574         pr_debug("mod_x: %d, mod_y: %d, min_w: %d, min_h = %d",
 575                                         mod_x, mod_y, min_w, min_h);
 576         pr_debug("tmp_w : %d, tmp_h : %d", tmp_w, tmp_h);
 577
 578         v4l_bound_align_image(&tmp_w, min_w, max_w, mod_x,
 579                               &tmp_h, min_h, max_h, mod_y, 0);
 580
 581         if (!V4L2_TYPE_IS_OUTPUT(cr->type) &&
 582                 (ctx->gsc_ctrls.rotate->val == 90 ||
 583                 ctx->gsc_ctrls.rotate->val == 270))
 584                 gsc_check_crop_change(tmp_h, tmp_w,
 585                                         &cr->c.width, &cr->c.height);
 586         else
 587                 gsc_check_crop_change(tmp_w, tmp_h,
 588                                         &cr->c.width, &cr->c.height);
 589
 590
 591         /* adjust left/top if cropping rectangle is out of bounds */
 592         /* Need to add code to algin left value with 2's multiple */
 593         if (cr->c.left + tmp_w > max_w)
 594                 cr->c.left = max_w - tmp_w;
 595         if (cr->c.top + tmp_h > max_h)
 596                 cr->c.top = max_h - tmp_h;
 597
 598         if ((is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color)) &&
 599                 cr->c.left & 1)
 600                         cr->c.left -= 1;
 601
 602         pr_debug("Aligned l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
 603             cr->c.left, cr->c.top, cr->c.width, cr->c.height, max_w, max_h);
 604
 605         return 0;
 606 }
 607
 608 int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
 609                            int dh, int rot, int out_path)
 610 {
 611         int tmp_w, tmp_h, sc_down_max;
 612
 613         if (out_path == GSC_DMA)
 614                 sc_down_max = var->sc_down_max;
 615         else
 616                 sc_down_max = var->local_sc_down;
 617
 618         if (rot == 90 || rot == 270) {
 619                 tmp_w = dh;
 620                 tmp_h = dw;
 621         } else {
 622                 tmp_w = dw;
 623                 tmp_h = dh;
 624         }
 625
 626         if ((sw / tmp_w) > sc_down_max ||
 627             (sh / tmp_h) > sc_down_max ||
 628             (tmp_w / sw) > var->sc_up_max ||
 629             (tmp_h / sh) > var->sc_up_max)
 630                 return -EINVAL;
 631
 632         return 0;
 633 }
 634
 635 int gsc_set_scaler_info(struct gsc_ctx *ctx)
 636 {
 637         struct gsc_scaler *sc = &ctx->scaler;
 638         struct gsc_frame *s_frame = &ctx->s_frame;
 639         struct gsc_frame *d_frame = &ctx->d_frame;
 640         struct gsc_variant *variant = ctx->gsc_dev->variant;
 641         struct device *dev = &ctx->gsc_dev->pdev->dev;
 642         int tx, ty;
 643         int ret;
 644
 645         ret = gsc_check_scaler_ratio(variant, s_frame->crop.width,
 646                 s_frame->crop.height, d_frame->crop.width, d_frame->crop.height,
 647                 ctx->gsc_ctrls.rotate->val, ctx->out_path);
 648         if (ret) {
 649                 pr_err("out of scaler range");
 650                 return ret;
 651         }
 652
 653         if (ctx->gsc_ctrls.rotate->val == 90 ||
 654             ctx->gsc_ctrls.rotate->val == 270) {
 655                 ty = d_frame->crop.width;
 656                 tx = d_frame->crop.height;
 657         } else {
 658                 tx = d_frame->crop.width;
 659                 ty = d_frame->crop.height;
 660         }
 661
 662         if (tx <= 0 || ty <= 0) {
 663                 dev_err(dev, "Invalid target size: %dx%d", tx, ty);
 664                 return -EINVAL;
 665         }
 666
 667         ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.width,
 668                                       tx, &sc->pre_hratio);
 669         if (ret) {
 670                 pr_err("Horizontal scale ratio is out of range");
 671                 return ret;
 672         }
 673
 674         ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.height,
 675                                       ty, &sc->pre_vratio);
 676         if (ret) {
 677                 pr_err("Vertical scale ratio is out of range");
 678                 return ret;
 679         }
 680
 681         gsc_check_src_scale_info(variant, s_frame, &sc->pre_hratio,
 682                                  tx, ty, &sc->pre_vratio);
 683
 684         gsc_get_prescaler_shfactor(sc->pre_hratio, sc->pre_vratio,
 685                                    &sc->pre_shfactor);
 686
 687         sc->main_hratio = (s_frame->crop.width << 16) / tx;
 688         sc->main_vratio = (s_frame->crop.height << 16) / ty;
 689
 690         pr_debug("scaler input/output size : sx = %d, sy = %d, tx = %d, ty = %d",
 691                         s_frame->crop.width, s_frame->crop.height, tx, ty);
 692         pr_debug("scaler ratio info : pre_shfactor : %d, pre_h : %d",
 693                         sc->pre_shfactor, sc->pre_hratio);
 694         pr_debug("pre_v :%d, main_h : %d, main_v : %d",
 695                         sc->pre_vratio, sc->main_hratio, sc->main_vratio);
 696
 697         return 0;
 698 }
 699
 700 static int __gsc_s_ctrl(struct gsc_ctx *ctx, struct v4l2_ctrl *ctrl)
 701 {
 702         struct gsc_dev *gsc = ctx->gsc_dev;
 703         struct gsc_variant *variant = gsc->variant;
 704         unsigned int flags = GSC_DST_FMT | GSC_SRC_FMT;
 705         int ret = 0;
 706
 707         if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
 708                 return 0;
 709
 710         switch (ctrl->id) {
 711         case V4L2_CID_HFLIP:
 712                 ctx->hflip = ctrl->val;
 713                 break;
 714
 715         case V4L2_CID_VFLIP:
 716                 ctx->vflip = ctrl->val;
 717                 break;
 718
 719         case V4L2_CID_ROTATE:
 720                 if ((ctx->state & flags) == flags) {
 721                         ret = gsc_check_scaler_ratio(variant,
 722                                         ctx->s_frame.crop.width,
 723                                         ctx->s_frame.crop.height,
 724                                         ctx->d_frame.crop.width,
 725                                         ctx->d_frame.crop.height,
 726                                         ctx->gsc_ctrls.rotate->val,
 727                                         ctx->out_path);
 728
 729                         if (ret)
 730                                 return -EINVAL;
 731                 }
 732
 733                 ctx->rotation = ctrl->val;
 734                 break;
 735
 736         case V4L2_CID_ALPHA_COMPONENT:
 737                 ctx->d_frame.alpha = ctrl->val;
 738                 break;
 739         }
 740
 741         ctx->state |= GSC_PARAMS;
 742         return 0;
 743 }
 744
 745 static int gsc_s_ctrl(struct v4l2_ctrl *ctrl)
 746 {
 747         struct gsc_ctx *ctx = ctrl_to_ctx(ctrl);
 748         unsigned long flags;
 749         int ret;
 750
 751         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 752         ret = __gsc_s_ctrl(ctx, ctrl);
 753         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 754
 755         return ret;
 756 }
 757
 758 static const struct v4l2_ctrl_ops gsc_ctrl_ops = {
 759         .s_ctrl = gsc_s_ctrl,
 760 };
 761
 762 int gsc_ctrls_create(struct gsc_ctx *ctx)
 763 {
 764         if (ctx->ctrls_rdy) {
 765                 pr_err("Control handler of this context was created already");
 766                 return 0;
 767         }
 768
 769         v4l2_ctrl_handler_init(&ctx->ctrl_handler, GSC_MAX_CTRL_NUM);
 770
 771         ctx->gsc_ctrls.rotate = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 772                                 &gsc_ctrl_ops, V4L2_CID_ROTATE, 0, 270, 90, 0);
 773         ctx->gsc_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 774                                 &gsc_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
 775         ctx->gsc_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 776                                 &gsc_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
 777         ctx->gsc_ctrls.global_alpha = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 778                         &gsc_ctrl_ops, V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
 779
 780         ctx->ctrls_rdy = ctx->ctrl_handler.error == 0;
 781
 782         if (ctx->ctrl_handler.error) {
 783                 int err = ctx->ctrl_handler.error;
 784                 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 785                 pr_err("Failed to create G-Scaler control handlers");
 786                 return err;
 787         }
 788
 789         return 0;
 790 }
 791
 792 void gsc_ctrls_delete(struct gsc_ctx *ctx)
 793 {
 794         if (ctx->ctrls_rdy) {
 795                 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 796                 ctx->ctrls_rdy = false;
 797         }
 798 }
 799
 800 /* The color format (num_comp, num_planes) must be already configured. */
 801 int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
 802                         struct gsc_frame *frame, struct gsc_addr *addr)
 803 {
 804         int ret = 0;
 805         u32 pix_size;
 806
 807         if ((vb == NULL) || (frame == NULL))
 808                 return -EINVAL;
 809
 810         pix_size = frame->f_width * frame->f_height;
 811
 812         pr_debug("num_planes= %d, num_comp= %d, pix_size= %d",
 813                 frame->fmt->num_planes, frame->fmt->num_comp, pix_size);
 814
 815         addr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
 816
 817         if (frame->fmt->num_planes == 1) {
 818                 switch (frame->fmt->num_comp) {
 819                 case 1:
 820                         addr->cb = 0;
 821                         addr->cr = 0;
 822                         break;
 823                 case 2:
 824                         /* decompose Y into Y/Cb */
 825                         addr->cb = (dma_addr_t)(addr->y + pix_size);
 826                         addr->cr = 0;
 827                         break;
 828                 case 3:
 829                         /* decompose Y into Y/Cb/Cr */
 830                         addr->cb = (dma_addr_t)(addr->y + pix_size);
 831                         if (GSC_YUV420 == frame->fmt->color)
 832                                 addr->cr = (dma_addr_t)(addr->cb
 833                                                 + (pix_size >> 2));
 834                         else /* 422 */
 835                                 addr->cr = (dma_addr_t)(addr->cb
 836                                                 + (pix_size >> 1));
 837                         break;
 838                 default:
 839                         pr_err("Invalid the number of color planes");
 840                         return -EINVAL;
 841                 }
 842         } else {
 843                 if (frame->fmt->num_planes >= 2)
 844                         addr->cb = vb2_dma_contig_plane_dma_addr(vb, 1);
 845
 846                 if (frame->fmt->num_planes == 3)
 847                         addr->cr = vb2_dma_contig_plane_dma_addr(vb, 2);
 848         }
 849
 850         if ((frame->fmt->pixelformat == V4L2_PIX_FMT_VYUY) ||
 851                 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVYU) ||
 852                 (frame->fmt->pixelformat == V4L2_PIX_FMT_NV61) ||
 853                 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420) ||
 854                 (frame->fmt->pixelformat == V4L2_PIX_FMT_NV21) ||
 855                 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420M))
 856                 swap(addr->cb, addr->cr);
 857
 858         pr_debug("ADDR: y= %pad  cb= %pad cr= %pad ret= %d",
 859                 &addr->y, &addr->cb, &addr->cr, ret);
 860
 861         return ret;
 862 }
 863
 864 static irqreturn_t gsc_irq_handler(int irq, void *priv)
 865 {
 866         struct gsc_dev *gsc = priv;
 867         struct gsc_ctx *ctx;
 868         int gsc_irq;
 869
 870         gsc_irq = gsc_hw_get_irq_status(gsc);
 871         gsc_hw_clear_irq(gsc, gsc_irq);
 872
 873         if (gsc_irq == GSC_IRQ_OVERRUN) {
 874                 pr_err("Local path input over-run interrupt has occurred!\n");
 875                 return IRQ_HANDLED;
 876         }
 877
 878         spin_lock(&gsc->slock);
 879
 880         if (test_and_clear_bit(ST_M2M_PEND, &gsc->state)) {
 881
 882                 gsc_hw_enable_control(gsc, false);
 883
 884                 if (test_and_clear_bit(ST_M2M_SUSPENDING, &gsc->state)) {
 885                         set_bit(ST_M2M_SUSPENDED, &gsc->state);
 886                         wake_up(&gsc->irq_queue);
 887                         goto isr_unlock;
 888                 }
 889                 ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
 890
 891                 if (!ctx || !ctx->m2m_ctx)
 892                         goto isr_unlock;
 893
 894                 spin_unlock(&gsc->slock);
 895                 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_DONE);
 896
 897                 /* wake_up job_abort, stop_streaming */
 898                 if (ctx->state & GSC_CTX_STOP_REQ) {
 899                         ctx->state &= ~GSC_CTX_STOP_REQ;
 900                         wake_up(&gsc->irq_queue);
 901                 }
 902                 return IRQ_HANDLED;
 903         }
 904
 905 isr_unlock:
 906         spin_unlock(&gsc->slock);
 907         return IRQ_HANDLED;
 908 }
 909
 910 static struct gsc_pix_max gsc_v_100_max = {
 911         .org_scaler_bypass_w    = 8192,
 912         .org_scaler_bypass_h    = 8192,
 913         .org_scaler_input_w     = 4800,
 914         .org_scaler_input_h     = 3344,
 915         .real_rot_dis_w         = 4800,
 916         .real_rot_dis_h         = 3344,
 917         .real_rot_en_w          = 2047,
 918         .real_rot_en_h          = 2047,
 919         .target_rot_dis_w       = 4800,
 920         .target_rot_dis_h       = 3344,
 921         .target_rot_en_w        = 2016,
 922         .target_rot_en_h        = 2016,
 923 };
 924
 925 static struct gsc_pix_min gsc_v_100_min = {
 926         .org_w                  = 64,
 927         .org_h                  = 32,
 928         .real_w                 = 64,
 929         .real_h                 = 32,
 930         .target_rot_dis_w       = 64,
 931         .target_rot_dis_h       = 32,
 932         .target_rot_en_w        = 32,
 933         .target_rot_en_h        = 16,
 934 };
 935
 936 static struct gsc_pix_align gsc_v_100_align = {
 937         .org_h                  = 16,
 938         .org_w                  = 16, /* yuv420 : 16, others : 8 */
 939         .offset_h               = 2,  /* yuv420/422 : 2, others : 1 */
 940         .real_w                 = 16, /* yuv420/422 : 4~16, others : 2~8 */
 941         .real_h                 = 16, /* yuv420 : 4~16, others : 1 */
 942         .target_w               = 2,  /* yuv420/422 : 2, others : 1 */
 943         .target_h               = 2,  /* yuv420 : 2, others : 1 */
 944 };
 945
 946 static struct gsc_variant gsc_v_100_variant = {
 947         .pix_max                = &gsc_v_100_max,
 948         .pix_min                = &gsc_v_100_min,
 949         .pix_align              = &gsc_v_100_align,
 950         .in_buf_cnt             = 32,
 951         .out_buf_cnt            = 32,
 952         .sc_up_max              = 8,
 953         .sc_down_max            = 16,
 954         .poly_sc_down_max       = 4,
 955         .pre_sc_down_max        = 4,
 956         .local_sc_down          = 2,
 957 };
 958
 959 static struct gsc_driverdata gsc_v_100_drvdata = {
 960         .variant = {
 961                 [0] = &gsc_v_100_variant,
 962                 [1] = &gsc_v_100_variant,
 963                 [2] = &gsc_v_100_variant,
 964                 [3] = &gsc_v_100_variant,
 965         },
 966         .num_entities = 4,
 967         .lclk_frequency = 266000000UL,
 968 };
 969
 970 static struct platform_device_id gsc_driver_ids[] = {
 971         {
 972                 .name           = "exynos-gsc",
 973                 .driver_data    = (unsigned long)&gsc_v_100_drvdata,
 974         },
 975         {},
 976 };
 977 MODULE_DEVICE_TABLE(platform, gsc_driver_ids);
 978
 979 static const struct of_device_id exynos_gsc_match[] = {
 980         {
 981                 .compatible = "samsung,exynos5-gsc",
 982                 .data = &gsc_v_100_drvdata,
 983         },
 984         {},
 985 };
 986 MODULE_DEVICE_TABLE(of, exynos_gsc_match);
 987
 988 static void *gsc_get_drv_data(struct platform_device *pdev)
 989 {
 990         struct gsc_driverdata *driver_data = NULL;
 991
 992         if (pdev->dev.of_node) {
 993                 const struct of_device_id *match;
 994                 match = of_match_node(exynos_gsc_match,
 995                                         pdev->dev.of_node);
 996                 if (match)
 997                         driver_data = (struct gsc_driverdata *)match->data;
 998         } else {
 999                 driver_data = (struct gsc_driverdata *)
1000                         platform_get_device_id(pdev)->driver_data;
1001         }
1002
1003         return driver_data;
1004 }
1005
1006 static void gsc_clk_put(struct gsc_dev *gsc)
1007 {
1008         if (!IS_ERR(gsc->clock))
1009                 clk_unprepare(gsc->clock);
1010 }
1011
1012 static int gsc_clk_get(struct gsc_dev *gsc)
1013 {
1014         int ret;
1015
1016         dev_dbg(&gsc->pdev->dev, "gsc_clk_get Called\n");
1017
1018         gsc->clock = devm_clk_get(&gsc->pdev->dev, GSC_CLOCK_GATE_NAME);
1019         if (IS_ERR(gsc->clock)) {
1020                 dev_err(&gsc->pdev->dev, "failed to get clock~~~: %s\n",
1021                         GSC_CLOCK_GATE_NAME);
1022                 return PTR_ERR(gsc->clock);
1023         }
1024
1025         ret = clk_prepare(gsc->clock);
1026         if (ret < 0) {
1027                 dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
1028                         GSC_CLOCK_GATE_NAME);
1029                 gsc->clock = ERR_PTR(-EINVAL);
1030                 return ret;
1031         }
1032
1033         return 0;
1034 }
1035
1036 static int gsc_m2m_suspend(struct gsc_dev *gsc)
1037 {
1038         unsigned long flags;
1039         int timeout;
1040
1041         spin_lock_irqsave(&gsc->slock, flags);
1042         if (!gsc_m2m_pending(gsc)) {
1043                 spin_unlock_irqrestore(&gsc->slock, flags);
1044                 return 0;
1045         }
1046         clear_bit(ST_M2M_SUSPENDED, &gsc->state);
1047         set_bit(ST_M2M_SUSPENDING, &gsc->state);
1048         spin_unlock_irqrestore(&gsc->slock, flags);
1049
1050         timeout = wait_event_timeout(gsc->irq_queue,
1051                              test_bit(ST_M2M_SUSPENDED, &gsc->state),
1052                              GSC_SHUTDOWN_TIMEOUT);
1053
1054         clear_bit(ST_M2M_SUSPENDING, &gsc->state);
1055         return timeout == 0 ? -EAGAIN : 0;
1056 }
1057
1058 static int gsc_m2m_resume(struct gsc_dev *gsc)
1059 {
1060         struct gsc_ctx *ctx;
1061         unsigned long flags;
1062
1063         spin_lock_irqsave(&gsc->slock, flags);
1064         /* Clear for full H/W setup in first run after resume */
1065         ctx = gsc->m2m.ctx;
1066         gsc->m2m.ctx = NULL;
1067         spin_unlock_irqrestore(&gsc->slock, flags);
1068
1069         if (test_and_clear_bit(ST_M2M_SUSPENDED, &gsc->state))
1070                 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
1071
1072         return 0;
1073 }
1074
1075 static int gsc_probe(struct platform_device *pdev)
1076 {
1077         struct gsc_dev *gsc;
1078         struct resource *res;
1079         struct gsc_driverdata *drv_data = gsc_get_drv_data(pdev);
1080         struct device *dev = &pdev->dev;
1081         int ret = 0;
1082
1083         gsc = devm_kzalloc(dev, sizeof(struct gsc_dev), GFP_KERNEL);
1084         if (!gsc)
1085                 return -ENOMEM;
1086
1087         if (dev->of_node)
1088                 gsc->id = of_alias_get_id(pdev->dev.of_node, "gsc");
1089         else
1090                 gsc->id = pdev->id;
1091
1092         if (gsc->id >= drv_data->num_entities) {
1093                 dev_err(dev, "Invalid platform device id: %d\n", gsc->id);
1094                 return -EINVAL;
1095         }
1096
1097         gsc->variant = drv_data->variant[gsc->id];
1098         gsc->pdev = pdev;
1099         gsc->pdata = dev->platform_data;
1100
1101         init_waitqueue_head(&gsc->irq_queue);
1102         spin_lock_init(&gsc->slock);
1103         mutex_init(&gsc->lock);
1104         gsc->clock = ERR_PTR(-EINVAL);
1105
1106         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1107         gsc->regs = devm_ioremap_resource(dev, res);
1108         if (IS_ERR(gsc->regs))
1109                 return PTR_ERR(gsc->regs);
1110
1111         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1112         if (!res) {
1113                 dev_err(dev, "failed to get IRQ resource\n");
1114                 return -ENXIO;
1115         }
1116
1117         ret = gsc_clk_get(gsc);
1118         if (ret)
1119                 return ret;
1120
1121         ret = devm_request_irq(dev, res->start, gsc_irq_handler,
1122                                 0, pdev->name, gsc);
1123         if (ret) {
1124                 dev_err(dev, "failed to install irq (%d)\n", ret);
1125                 goto err_clk;
1126         }
1127
1128         ret = v4l2_device_register(dev, &gsc->v4l2_dev);
1129         if (ret)
1130                 goto err_clk;
1131
1132         ret = gsc_register_m2m_device(gsc);
1133         if (ret)
1134                 goto err_v4l2;
1135
1136         platform_set_drvdata(pdev, gsc);
1137         pm_runtime_enable(dev);
1138         ret = pm_runtime_get_sync(&pdev->dev);
1139         if (ret < 0)
1140                 goto err_m2m;
1141
1142         /* Initialize continious memory allocator */
1143         gsc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1144         if (IS_ERR(gsc->alloc_ctx)) {
1145                 ret = PTR_ERR(gsc->alloc_ctx);
1146                 goto err_pm;
1147         }
1148
1149         dev_dbg(dev, "gsc-%d registered successfully\n", gsc->id);
1150
1151         pm_runtime_put(dev);
1152         return 0;
1153 err_pm:
1154         pm_runtime_put(dev);
1155 err_m2m:
1156         gsc_unregister_m2m_device(gsc);
1157 err_v4l2:
1158         v4l2_device_unregister(&gsc->v4l2_dev);
1159 err_clk:
1160         gsc_clk_put(gsc);
1161         return ret;
1162 }
1163
1164 static int gsc_remove(struct platform_device *pdev)
1165 {
1166         struct gsc_dev *gsc = platform_get_drvdata(pdev);
1167
1168         gsc_unregister_m2m_device(gsc);
1169         v4l2_device_unregister(&gsc->v4l2_dev);
1170
1171         vb2_dma_contig_cleanup_ctx(gsc->alloc_ctx);
1172         pm_runtime_disable(&pdev->dev);
1173         gsc_clk_put(gsc);
1174
1175         dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1176         return 0;
1177 }
1178
1179 static int gsc_runtime_resume(struct device *dev)
1180 {
1181         struct gsc_dev *gsc = dev_get_drvdata(dev);
1182         int ret = 0;
1183
1184         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1185
1186         ret = clk_enable(gsc->clock);
1187         if (ret)
1188                 return ret;
1189
1190         gsc_hw_set_sw_reset(gsc);
1191         gsc_wait_reset(gsc);
1192
1193         return gsc_m2m_resume(gsc);
1194 }
1195
1196 static int gsc_runtime_suspend(struct device *dev)
1197 {
1198         struct gsc_dev *gsc = dev_get_drvdata(dev);
1199         int ret = 0;
1200
1201         ret = gsc_m2m_suspend(gsc);
1202         if (!ret)
1203                 clk_disable(gsc->clock);
1204
1205         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1206         return ret;
1207 }
1208
1209 static int gsc_resume(struct device *dev)
1210 {
1211         struct gsc_dev *gsc = dev_get_drvdata(dev);
1212         unsigned long flags;
1213
1214         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1215
1216         /* Do not resume if the device was idle before system suspend */
1217         spin_lock_irqsave(&gsc->slock, flags);
1218         if (!test_and_clear_bit(ST_SUSPEND, &gsc->state) ||
1219             !gsc_m2m_opened(gsc)) {
1220                 spin_unlock_irqrestore(&gsc->slock, flags);
1221                 return 0;
1222         }
1223         spin_unlock_irqrestore(&gsc->slock, flags);
1224
1225         if (!pm_runtime_suspended(dev))
1226                 return gsc_runtime_resume(dev);
1227
1228         return 0;
1229 }
1230
1231 static int gsc_suspend(struct device *dev)
1232 {
1233         struct gsc_dev *gsc = dev_get_drvdata(dev);
1234
1235         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1236
1237         if (test_and_set_bit(ST_SUSPEND, &gsc->state))
1238                 return 0;
1239
1240         if (!pm_runtime_suspended(dev))
1241                 return gsc_runtime_suspend(dev);
1242
1243         return 0;
1244 }
1245
1246 static const struct dev_pm_ops gsc_pm_ops = {
1247         .suspend                = gsc_suspend,
1248         .resume                 = gsc_resume,
1249         .runtime_suspend        = gsc_runtime_suspend,
1250         .runtime_resume         = gsc_runtime_resume,
1251 };
1252
1253 static struct platform_driver gsc_driver = {
1254         .probe          = gsc_probe,
1255         .remove         = gsc_remove,
1256         .id_table       = gsc_driver_ids,
1257         .driver = {
1258                 .name   = GSC_MODULE_NAME,
1259                 .pm     = &gsc_pm_ops,
1260                 .of_match_table = exynos_gsc_match,
1261         }
1262 };
1263
1264 module_platform_driver(gsc_driver);
1265
1266 MODULE_AUTHOR("Hyunwong Kim <khw0178.kim@samsung.com>");
1267 MODULE_DESCRIPTION("Samsung EXYNOS5 Soc series G-Scaler driver");
1268 MODULE_LICENSE("GPL");