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      = V4L2_MBUS_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      = V4L2_MBUS_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      = V4L2_MBUS_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      = V4L2_MBUS_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 u32 get_plane_info(struct gsc_frame *frm, u32 addr, u32 *index)
 323 {
 324         if (frm->addr.y == addr) {
 325                 *index = 0;
 326                 return frm->addr.y;
 327         } else if (frm->addr.cb == addr) {
 328                 *index = 1;
 329                 return frm->addr.cb;
 330         } else if (frm->addr.cr == addr) {
 331                 *index = 2;
 332                 return frm->addr.cr;
 333         } else {
 334                 pr_err("Plane address is wrong");
 335                 return -EINVAL;
 336         }
 337 }
 338
 339 void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm)
 340 {
 341         u32 f_chk_addr, f_chk_len, s_chk_addr, s_chk_len;
 342         f_chk_addr = f_chk_len = s_chk_addr = s_chk_len = 0;
 343
 344         f_chk_addr = frm->addr.y;
 345         f_chk_len = frm->payload[0];
 346         if (frm->fmt->num_planes == 2) {
 347                 s_chk_addr = frm->addr.cb;
 348                 s_chk_len = frm->payload[1];
 349         } else if (frm->fmt->num_planes == 3) {
 350                 u32 low_addr, low_plane, mid_addr, mid_plane;
 351                 u32 high_addr, high_plane;
 352                 u32 t_min, t_max;
 353
 354                 t_min = min3(frm->addr.y, frm->addr.cb, frm->addr.cr);
 355                 low_addr = get_plane_info(frm, t_min, &low_plane);
 356                 t_max = max3(frm->addr.y, frm->addr.cb, frm->addr.cr);
 357                 high_addr = get_plane_info(frm, t_max, &high_plane);
 358
 359                 mid_plane = 3 - (low_plane + high_plane);
 360                 if (mid_plane == 0)
 361                         mid_addr = frm->addr.y;
 362                 else if (mid_plane == 1)
 363                         mid_addr = frm->addr.cb;
 364                 else if (mid_plane == 2)
 365                         mid_addr = frm->addr.cr;
 366                 else
 367                         return;
 368
 369                 f_chk_addr = low_addr;
 370                 if (mid_addr + frm->payload[mid_plane] - low_addr >
 371                     high_addr + frm->payload[high_plane] - mid_addr) {
 372                         f_chk_len = frm->payload[low_plane];
 373                         s_chk_addr = mid_addr;
 374                         s_chk_len = high_addr +
 375                                         frm->payload[high_plane] - mid_addr;
 376                 } else {
 377                         f_chk_len = mid_addr +
 378                                         frm->payload[mid_plane] - low_addr;
 379                         s_chk_addr = high_addr;
 380                         s_chk_len = frm->payload[high_plane];
 381                 }
 382         }
 383         pr_debug("f_addr = 0x%08x, f_len = %d, s_addr = 0x%08x, s_len = %d\n",
 384                         f_chk_addr, f_chk_len, s_chk_addr, s_chk_len);
 385 }
 386
 387 int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 388 {
 389         struct gsc_dev *gsc = ctx->gsc_dev;
 390         struct gsc_variant *variant = gsc->variant;
 391         struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 392         const struct gsc_fmt *fmt;
 393         u32 max_w, max_h, mod_x, mod_y;
 394         u32 min_w, min_h, tmp_w, tmp_h;
 395         int i;
 396
 397         pr_debug("user put w: %d, h: %d", pix_mp->width, pix_mp->height);
 398
 399         fmt = find_fmt(&pix_mp->pixelformat, NULL, 0);
 400         if (!fmt) {
 401                 pr_err("pixelformat format (0x%X) invalid\n",
 402                                                 pix_mp->pixelformat);
 403                 return -EINVAL;
 404         }
 405
 406         if (pix_mp->field == V4L2_FIELD_ANY)
 407                 pix_mp->field = V4L2_FIELD_NONE;
 408         else if (pix_mp->field != V4L2_FIELD_NONE) {
 409                 pr_err("Not supported field order(%d)\n", pix_mp->field);
 410                 return -EINVAL;
 411         }
 412
 413         max_w = variant->pix_max->target_rot_dis_w;
 414         max_h = variant->pix_max->target_rot_dis_h;
 415
 416         mod_x = ffs(variant->pix_align->org_w) - 1;
 417         if (is_yuv420(fmt->color))
 418                 mod_y = ffs(variant->pix_align->org_h) - 1;
 419         else
 420                 mod_y = ffs(variant->pix_align->org_h) - 2;
 421
 422         if (V4L2_TYPE_IS_OUTPUT(f->type)) {
 423                 min_w = variant->pix_min->org_w;
 424                 min_h = variant->pix_min->org_h;
 425         } else {
 426                 min_w = variant->pix_min->target_rot_dis_w;
 427                 min_h = variant->pix_min->target_rot_dis_h;
 428         }
 429
 430         pr_debug("mod_x: %d, mod_y: %d, max_w: %d, max_h = %d",
 431                         mod_x, mod_y, max_w, max_h);
 432
 433         /* To check if image size is modified to adjust parameter against
 434            hardware abilities */
 435         tmp_w = pix_mp->width;
 436         tmp_h = pix_mp->height;
 437
 438         v4l_bound_align_image(&pix_mp->width, min_w, max_w, mod_x,
 439                 &pix_mp->height, min_h, max_h, mod_y, 0);
 440         if (tmp_w != pix_mp->width || tmp_h != pix_mp->height)
 441                 pr_info("Image size has been modified from %dx%d to %dx%d",
 442                          tmp_w, tmp_h, pix_mp->width, pix_mp->height);
 443
 444         pix_mp->num_planes = fmt->num_planes;
 445
 446         if (pix_mp->width >= 1280) /* HD */
 447                 pix_mp->colorspace = V4L2_COLORSPACE_REC709;
 448         else /* SD */
 449                 pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
 450
 451
 452         for (i = 0; i < pix_mp->num_planes; ++i) {
 453                 int bpl = (pix_mp->width * fmt->depth[i]) >> 3;
 454                 pix_mp->plane_fmt[i].bytesperline = bpl;
 455                 pix_mp->plane_fmt[i].sizeimage = bpl * pix_mp->height;
 456
 457                 pr_debug("[%d]: bpl: %d, sizeimage: %d",
 458                                 i, bpl, pix_mp->plane_fmt[i].sizeimage);
 459         }
 460
 461         return 0;
 462 }
 463
 464 int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 465 {
 466         struct gsc_frame *frame;
 467         struct v4l2_pix_format_mplane *pix_mp;
 468         int i;
 469
 470         frame = ctx_get_frame(ctx, f->type);
 471         if (IS_ERR(frame))
 472                 return PTR_ERR(frame);
 473
 474         pix_mp = &f->fmt.pix_mp;
 475
 476         pix_mp->width           = frame->f_width;
 477         pix_mp->height          = frame->f_height;
 478         pix_mp->field           = V4L2_FIELD_NONE;
 479         pix_mp->pixelformat     = frame->fmt->pixelformat;
 480         pix_mp->colorspace      = V4L2_COLORSPACE_REC709;
 481         pix_mp->num_planes      = frame->fmt->num_planes;
 482
 483         for (i = 0; i < pix_mp->num_planes; ++i) {
 484                 pix_mp->plane_fmt[i].bytesperline = (frame->f_width *
 485                         frame->fmt->depth[i]) / 8;
 486                 pix_mp->plane_fmt[i].sizeimage =
 487                          pix_mp->plane_fmt[i].bytesperline * frame->f_height;
 488         }
 489
 490         return 0;
 491 }
 492
 493 void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h)
 494 {
 495         if (tmp_w != *w || tmp_h != *h) {
 496                 pr_info("Cropped size has been modified from %dx%d to %dx%d",
 497                                                         *w, *h, tmp_w, tmp_h);
 498                 *w = tmp_w;
 499                 *h = tmp_h;
 500         }
 501 }
 502
 503 int gsc_g_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
 504 {
 505         struct gsc_frame *frame;
 506
 507         frame = ctx_get_frame(ctx, cr->type);
 508         if (IS_ERR(frame))
 509                 return PTR_ERR(frame);
 510
 511         cr->c = frame->crop;
 512
 513         return 0;
 514 }
 515
 516 int gsc_try_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
 517 {
 518         struct gsc_frame *f;
 519         struct gsc_dev *gsc = ctx->gsc_dev;
 520         struct gsc_variant *variant = gsc->variant;
 521         u32 mod_x = 0, mod_y = 0, tmp_w, tmp_h;
 522         u32 min_w, min_h, max_w, max_h;
 523
 524         if (cr->c.top < 0 || cr->c.left < 0) {
 525                 pr_err("doesn't support negative values for top & left\n");
 526                 return -EINVAL;
 527         }
 528         pr_debug("user put w: %d, h: %d", cr->c.width, cr->c.height);
 529
 530         if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 531                 f = &ctx->d_frame;
 532         else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 533                 f = &ctx->s_frame;
 534         else
 535                 return -EINVAL;
 536
 537         max_w = f->f_width;
 538         max_h = f->f_height;
 539         tmp_w = cr->c.width;
 540         tmp_h = cr->c.height;
 541
 542         if (V4L2_TYPE_IS_OUTPUT(cr->type)) {
 543                 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 1) ||
 544                     is_rgb(f->fmt->color))
 545                         min_w = 32;
 546                 else
 547                         min_w = 64;
 548                 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 3) ||
 549                     is_yuv420(f->fmt->color))
 550                         min_h = 32;
 551                 else
 552                         min_h = 16;
 553         } else {
 554                 if (is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color))
 555                         mod_x = ffs(variant->pix_align->target_w) - 1;
 556                 if (is_yuv420(f->fmt->color))
 557                         mod_y = ffs(variant->pix_align->target_h) - 1;
 558                 if (ctx->gsc_ctrls.rotate->val == 90 ||
 559                     ctx->gsc_ctrls.rotate->val == 270) {
 560                         max_w = f->f_height;
 561                         max_h = f->f_width;
 562                         min_w = variant->pix_min->target_rot_en_w;
 563                         min_h = variant->pix_min->target_rot_en_h;
 564                         tmp_w = cr->c.height;
 565                         tmp_h = cr->c.width;
 566                 } else {
 567                         min_w = variant->pix_min->target_rot_dis_w;
 568                         min_h = variant->pix_min->target_rot_dis_h;
 569                 }
 570         }
 571         pr_debug("mod_x: %d, mod_y: %d, min_w: %d, min_h = %d",
 572                                         mod_x, mod_y, min_w, min_h);
 573         pr_debug("tmp_w : %d, tmp_h : %d", tmp_w, tmp_h);
 574
 575         v4l_bound_align_image(&tmp_w, min_w, max_w, mod_x,
 576                               &tmp_h, min_h, max_h, mod_y, 0);
 577
 578         if (!V4L2_TYPE_IS_OUTPUT(cr->type) &&
 579                 (ctx->gsc_ctrls.rotate->val == 90 ||
 580                 ctx->gsc_ctrls.rotate->val == 270))
 581                 gsc_check_crop_change(tmp_h, tmp_w,
 582                                         &cr->c.width, &cr->c.height);
 583         else
 584                 gsc_check_crop_change(tmp_w, tmp_h,
 585                                         &cr->c.width, &cr->c.height);
 586
 587
 588         /* adjust left/top if cropping rectangle is out of bounds */
 589         /* Need to add code to algin left value with 2's multiple */
 590         if (cr->c.left + tmp_w > max_w)
 591                 cr->c.left = max_w - tmp_w;
 592         if (cr->c.top + tmp_h > max_h)
 593                 cr->c.top = max_h - tmp_h;
 594
 595         if ((is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color)) &&
 596                 cr->c.left & 1)
 597                         cr->c.left -= 1;
 598
 599         pr_debug("Aligned l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
 600             cr->c.left, cr->c.top, cr->c.width, cr->c.height, max_w, max_h);
 601
 602         return 0;
 603 }
 604
 605 int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
 606                            int dh, int rot, int out_path)
 607 {
 608         int tmp_w, tmp_h, sc_down_max;
 609
 610         if (out_path == GSC_DMA)
 611                 sc_down_max = var->sc_down_max;
 612         else
 613                 sc_down_max = var->local_sc_down;
 614
 615         if (rot == 90 || rot == 270) {
 616                 tmp_w = dh;
 617                 tmp_h = dw;
 618         } else {
 619                 tmp_w = dw;
 620                 tmp_h = dh;
 621         }
 622
 623         if ((sw / tmp_w) > sc_down_max ||
 624             (sh / tmp_h) > sc_down_max ||
 625             (tmp_w / sw) > var->sc_up_max ||
 626             (tmp_h / sh) > var->sc_up_max)
 627                 return -EINVAL;
 628
 629         return 0;
 630 }
 631
 632 int gsc_set_scaler_info(struct gsc_ctx *ctx)
 633 {
 634         struct gsc_scaler *sc = &ctx->scaler;
 635         struct gsc_frame *s_frame = &ctx->s_frame;
 636         struct gsc_frame *d_frame = &ctx->d_frame;
 637         struct gsc_variant *variant = ctx->gsc_dev->variant;
 638         struct device *dev = &ctx->gsc_dev->pdev->dev;
 639         int tx, ty;
 640         int ret;
 641
 642         ret = gsc_check_scaler_ratio(variant, s_frame->crop.width,
 643                 s_frame->crop.height, d_frame->crop.width, d_frame->crop.height,
 644                 ctx->gsc_ctrls.rotate->val, ctx->out_path);
 645         if (ret) {
 646                 pr_err("out of scaler range");
 647                 return ret;
 648         }
 649
 650         if (ctx->gsc_ctrls.rotate->val == 90 ||
 651             ctx->gsc_ctrls.rotate->val == 270) {
 652                 ty = d_frame->crop.width;
 653                 tx = d_frame->crop.height;
 654         } else {
 655                 tx = d_frame->crop.width;
 656                 ty = d_frame->crop.height;
 657         }
 658
 659         if (tx <= 0 || ty <= 0) {
 660                 dev_err(dev, "Invalid target size: %dx%d", tx, ty);
 661                 return -EINVAL;
 662         }
 663
 664         ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.width,
 665                                       tx, &sc->pre_hratio);
 666         if (ret) {
 667                 pr_err("Horizontal scale ratio is out of range");
 668                 return ret;
 669         }
 670
 671         ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.height,
 672                                       ty, &sc->pre_vratio);
 673         if (ret) {
 674                 pr_err("Vertical scale ratio is out of range");
 675                 return ret;
 676         }
 677
 678         gsc_check_src_scale_info(variant, s_frame, &sc->pre_hratio,
 679                                  tx, ty, &sc->pre_vratio);
 680
 681         gsc_get_prescaler_shfactor(sc->pre_hratio, sc->pre_vratio,
 682                                    &sc->pre_shfactor);
 683
 684         sc->main_hratio = (s_frame->crop.width << 16) / tx;
 685         sc->main_vratio = (s_frame->crop.height << 16) / ty;
 686
 687         pr_debug("scaler input/output size : sx = %d, sy = %d, tx = %d, ty = %d",
 688                         s_frame->crop.width, s_frame->crop.height, tx, ty);
 689         pr_debug("scaler ratio info : pre_shfactor : %d, pre_h : %d",
 690                         sc->pre_shfactor, sc->pre_hratio);
 691         pr_debug("pre_v :%d, main_h : %d, main_v : %d",
 692                         sc->pre_vratio, sc->main_hratio, sc->main_vratio);
 693
 694         return 0;
 695 }
 696
 697 static int __gsc_s_ctrl(struct gsc_ctx *ctx, struct v4l2_ctrl *ctrl)
 698 {
 699         struct gsc_dev *gsc = ctx->gsc_dev;
 700         struct gsc_variant *variant = gsc->variant;
 701         unsigned int flags = GSC_DST_FMT | GSC_SRC_FMT;
 702         int ret = 0;
 703
 704         if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
 705                 return 0;
 706
 707         switch (ctrl->id) {
 708         case V4L2_CID_HFLIP:
 709                 ctx->hflip = ctrl->val;
 710                 break;
 711
 712         case V4L2_CID_VFLIP:
 713                 ctx->vflip = ctrl->val;
 714                 break;
 715
 716         case V4L2_CID_ROTATE:
 717                 if ((ctx->state & flags) == flags) {
 718                         ret = gsc_check_scaler_ratio(variant,
 719                                         ctx->s_frame.crop.width,
 720                                         ctx->s_frame.crop.height,
 721                                         ctx->d_frame.crop.width,
 722                                         ctx->d_frame.crop.height,
 723                                         ctx->gsc_ctrls.rotate->val,
 724                                         ctx->out_path);
 725
 726                         if (ret)
 727                                 return -EINVAL;
 728                 }
 729
 730                 ctx->rotation = ctrl->val;
 731                 break;
 732
 733         case V4L2_CID_ALPHA_COMPONENT:
 734                 ctx->d_frame.alpha = ctrl->val;
 735                 break;
 736         }
 737
 738         ctx->state |= GSC_PARAMS;
 739         return 0;
 740 }
 741
 742 static int gsc_s_ctrl(struct v4l2_ctrl *ctrl)
 743 {
 744         struct gsc_ctx *ctx = ctrl_to_ctx(ctrl);
 745         unsigned long flags;
 746         int ret;
 747
 748         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 749         ret = __gsc_s_ctrl(ctx, ctrl);
 750         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 751
 752         return ret;
 753 }
 754
 755 static const struct v4l2_ctrl_ops gsc_ctrl_ops = {
 756         .s_ctrl = gsc_s_ctrl,
 757 };
 758
 759 int gsc_ctrls_create(struct gsc_ctx *ctx)
 760 {
 761         if (ctx->ctrls_rdy) {
 762                 pr_err("Control handler of this context was created already");
 763                 return 0;
 764         }
 765
 766         v4l2_ctrl_handler_init(&ctx->ctrl_handler, GSC_MAX_CTRL_NUM);
 767
 768         ctx->gsc_ctrls.rotate = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 769                                 &gsc_ctrl_ops, V4L2_CID_ROTATE, 0, 270, 90, 0);
 770         ctx->gsc_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 771                                 &gsc_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
 772         ctx->gsc_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 773                                 &gsc_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
 774         ctx->gsc_ctrls.global_alpha = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 775                         &gsc_ctrl_ops, V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
 776
 777         ctx->ctrls_rdy = ctx->ctrl_handler.error == 0;
 778
 779         if (ctx->ctrl_handler.error) {
 780                 int err = ctx->ctrl_handler.error;
 781                 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 782                 pr_err("Failed to create G-Scaler control handlers");
 783                 return err;
 784         }
 785
 786         return 0;
 787 }
 788
 789 void gsc_ctrls_delete(struct gsc_ctx *ctx)
 790 {
 791         if (ctx->ctrls_rdy) {
 792                 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 793                 ctx->ctrls_rdy = false;
 794         }
 795 }
 796
 797 /* The color format (num_comp, num_planes) must be already configured. */
 798 int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
 799                         struct gsc_frame *frame, struct gsc_addr *addr)
 800 {
 801         int ret = 0;
 802         u32 pix_size;
 803
 804         if ((vb == NULL) || (frame == NULL))
 805                 return -EINVAL;
 806
 807         pix_size = frame->f_width * frame->f_height;
 808
 809         pr_debug("num_planes= %d, num_comp= %d, pix_size= %d",
 810                 frame->fmt->num_planes, frame->fmt->num_comp, pix_size);
 811
 812         addr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
 813
 814         if (frame->fmt->num_planes == 1) {
 815                 switch (frame->fmt->num_comp) {
 816                 case 1:
 817                         addr->cb = 0;
 818                         addr->cr = 0;
 819                         break;
 820                 case 2:
 821                         /* decompose Y into Y/Cb */
 822                         addr->cb = (dma_addr_t)(addr->y + pix_size);
 823                         addr->cr = 0;
 824                         break;
 825                 case 3:
 826                         /* decompose Y into Y/Cb/Cr */
 827                         addr->cb = (dma_addr_t)(addr->y + pix_size);
 828                         if (GSC_YUV420 == frame->fmt->color)
 829                                 addr->cr = (dma_addr_t)(addr->cb
 830                                                 + (pix_size >> 2));
 831                         else /* 422 */
 832                                 addr->cr = (dma_addr_t)(addr->cb
 833                                                 + (pix_size >> 1));
 834                         break;
 835                 default:
 836                         pr_err("Invalid the number of color planes");
 837                         return -EINVAL;
 838                 }
 839         } else {
 840                 if (frame->fmt->num_planes >= 2)
 841                         addr->cb = vb2_dma_contig_plane_dma_addr(vb, 1);
 842
 843                 if (frame->fmt->num_planes == 3)
 844                         addr->cr = vb2_dma_contig_plane_dma_addr(vb, 2);
 845         }
 846
 847         if ((frame->fmt->pixelformat == V4L2_PIX_FMT_VYUY) ||
 848                 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVYU) ||
 849                 (frame->fmt->pixelformat == V4L2_PIX_FMT_NV61) ||
 850                 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420) ||
 851                 (frame->fmt->pixelformat == V4L2_PIX_FMT_NV21) ||
 852                 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420M))
 853                 swap(addr->cb, addr->cr);
 854
 855         pr_debug("ADDR: y= 0x%X  cb= 0x%X cr= 0x%X ret= %d",
 856                 addr->y, addr->cb, addr->cr, ret);
 857
 858         return ret;
 859 }
 860
 861 static irqreturn_t gsc_irq_handler(int irq, void *priv)
 862 {
 863         struct gsc_dev *gsc = priv;
 864         struct gsc_ctx *ctx;
 865         int gsc_irq;
 866
 867         gsc_irq = gsc_hw_get_irq_status(gsc);
 868         gsc_hw_clear_irq(gsc, gsc_irq);
 869
 870         if (gsc_irq == GSC_IRQ_OVERRUN) {
 871                 pr_err("Local path input over-run interrupt has occurred!\n");
 872                 return IRQ_HANDLED;
 873         }
 874
 875         spin_lock(&gsc->slock);
 876
 877         if (test_and_clear_bit(ST_M2M_PEND, &gsc->state)) {
 878
 879                 gsc_hw_enable_control(gsc, false);
 880
 881                 if (test_and_clear_bit(ST_M2M_SUSPENDING, &gsc->state)) {
 882                         set_bit(ST_M2M_SUSPENDED, &gsc->state);
 883                         wake_up(&gsc->irq_queue);
 884                         goto isr_unlock;
 885                 }
 886                 ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
 887
 888                 if (!ctx || !ctx->m2m_ctx)
 889                         goto isr_unlock;
 890
 891                 spin_unlock(&gsc->slock);
 892                 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_DONE);
 893
 894                 /* wake_up job_abort, stop_streaming */
 895                 if (ctx->state & GSC_CTX_STOP_REQ) {
 896                         ctx->state &= ~GSC_CTX_STOP_REQ;
 897                         wake_up(&gsc->irq_queue);
 898                 }
 899                 return IRQ_HANDLED;
 900         }
 901
 902 isr_unlock:
 903         spin_unlock(&gsc->slock);
 904         return IRQ_HANDLED;
 905 }
 906
 907 static struct gsc_pix_max gsc_v_100_max = {
 908         .org_scaler_bypass_w    = 8192,
 909         .org_scaler_bypass_h    = 8192,
 910         .org_scaler_input_w     = 4800,
 911         .org_scaler_input_h     = 3344,
 912         .real_rot_dis_w         = 4800,
 913         .real_rot_dis_h         = 3344,
 914         .real_rot_en_w          = 2047,
 915         .real_rot_en_h          = 2047,
 916         .target_rot_dis_w       = 4800,
 917         .target_rot_dis_h       = 3344,
 918         .target_rot_en_w        = 2016,
 919         .target_rot_en_h        = 2016,
 920 };
 921
 922 static struct gsc_pix_min gsc_v_100_min = {
 923         .org_w                  = 64,
 924         .org_h                  = 32,
 925         .real_w                 = 64,
 926         .real_h                 = 32,
 927         .target_rot_dis_w       = 64,
 928         .target_rot_dis_h       = 32,
 929         .target_rot_en_w        = 32,
 930         .target_rot_en_h        = 16,
 931 };
 932
 933 static struct gsc_pix_align gsc_v_100_align = {
 934         .org_h                  = 16,
 935         .org_w                  = 16, /* yuv420 : 16, others : 8 */
 936         .offset_h               = 2,  /* yuv420/422 : 2, others : 1 */
 937         .real_w                 = 16, /* yuv420/422 : 4~16, others : 2~8 */
 938         .real_h                 = 16, /* yuv420 : 4~16, others : 1 */
 939         .target_w               = 2,  /* yuv420/422 : 2, others : 1 */
 940         .target_h               = 2,  /* yuv420 : 2, others : 1 */
 941 };
 942
 943 static struct gsc_variant gsc_v_100_variant = {
 944         .pix_max                = &gsc_v_100_max,
 945         .pix_min                = &gsc_v_100_min,
 946         .pix_align              = &gsc_v_100_align,
 947         .in_buf_cnt             = 32,
 948         .out_buf_cnt            = 32,
 949         .sc_up_max              = 8,
 950         .sc_down_max            = 16,
 951         .poly_sc_down_max       = 4,
 952         .pre_sc_down_max        = 4,
 953         .local_sc_down          = 2,
 954 };
 955
 956 static struct gsc_driverdata gsc_v_100_drvdata = {
 957         .variant = {
 958                 [0] = &gsc_v_100_variant,
 959                 [1] = &gsc_v_100_variant,
 960                 [2] = &gsc_v_100_variant,
 961                 [3] = &gsc_v_100_variant,
 962         },
 963         .num_entities = 4,
 964         .lclk_frequency = 266000000UL,
 965 };
 966
 967 static struct platform_device_id gsc_driver_ids[] = {
 968         {
 969                 .name           = "exynos-gsc",
 970                 .driver_data    = (unsigned long)&gsc_v_100_drvdata,
 971         },
 972         {},
 973 };
 974 MODULE_DEVICE_TABLE(platform, gsc_driver_ids);
 975
 976 static const struct of_device_id exynos_gsc_match[] = {
 977         {
 978                 .compatible = "samsung,exynos5-gsc",
 979                 .data = &gsc_v_100_drvdata,
 980         },
 981         {},
 982 };
 983 MODULE_DEVICE_TABLE(of, exynos_gsc_match);
 984
 985 static void *gsc_get_drv_data(struct platform_device *pdev)
 986 {
 987         struct gsc_driverdata *driver_data = NULL;
 988
 989         if (pdev->dev.of_node) {
 990                 const struct of_device_id *match;
 991                 match = of_match_node(of_match_ptr(exynos_gsc_match),
 992                                         pdev->dev.of_node);
 993                 if (match)
 994                         driver_data = (struct gsc_driverdata *)match->data;
 995         } else {
 996                 driver_data = (struct gsc_driverdata *)
 997                         platform_get_device_id(pdev)->driver_data;
 998         }
 999
1000         return driver_data;
1001 }
1002
1003 static void gsc_clk_put(struct gsc_dev *gsc)
1004 {
1005         if (!IS_ERR(gsc->clock))
1006                 clk_unprepare(gsc->clock);
1007 }
1008
1009 static int gsc_clk_get(struct gsc_dev *gsc)
1010 {
1011         int ret;
1012
1013         dev_dbg(&gsc->pdev->dev, "gsc_clk_get Called\n");
1014
1015         gsc->clock = devm_clk_get(&gsc->pdev->dev, GSC_CLOCK_GATE_NAME);
1016         if (IS_ERR(gsc->clock)) {
1017                 dev_err(&gsc->pdev->dev, "failed to get clock~~~: %s\n",
1018                         GSC_CLOCK_GATE_NAME);
1019                 return PTR_ERR(gsc->clock);
1020         }
1021
1022         ret = clk_prepare(gsc->clock);
1023         if (ret < 0) {
1024                 dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
1025                         GSC_CLOCK_GATE_NAME);
1026                 gsc->clock = ERR_PTR(-EINVAL);
1027                 return ret;
1028         }
1029
1030         return 0;
1031 }
1032
1033 static int gsc_m2m_suspend(struct gsc_dev *gsc)
1034 {
1035         unsigned long flags;
1036         int timeout;
1037
1038         spin_lock_irqsave(&gsc->slock, flags);
1039         if (!gsc_m2m_pending(gsc)) {
1040                 spin_unlock_irqrestore(&gsc->slock, flags);
1041                 return 0;
1042         }
1043         clear_bit(ST_M2M_SUSPENDED, &gsc->state);
1044         set_bit(ST_M2M_SUSPENDING, &gsc->state);
1045         spin_unlock_irqrestore(&gsc->slock, flags);
1046
1047         timeout = wait_event_timeout(gsc->irq_queue,
1048                              test_bit(ST_M2M_SUSPENDED, &gsc->state),
1049                              GSC_SHUTDOWN_TIMEOUT);
1050
1051         clear_bit(ST_M2M_SUSPENDING, &gsc->state);
1052         return timeout == 0 ? -EAGAIN : 0;
1053 }
1054
1055 static int gsc_m2m_resume(struct gsc_dev *gsc)
1056 {
1057         unsigned long flags;
1058
1059         spin_lock_irqsave(&gsc->slock, flags);
1060         /* Clear for full H/W setup in first run after resume */
1061         gsc->m2m.ctx = NULL;
1062         spin_unlock_irqrestore(&gsc->slock, flags);
1063
1064         if (test_and_clear_bit(ST_M2M_SUSPENDED, &gsc->state))
1065                 gsc_m2m_job_finish(gsc->m2m.ctx,
1066                                     VB2_BUF_STATE_ERROR);
1067         return 0;
1068 }
1069
1070 static int gsc_probe(struct platform_device *pdev)
1071 {
1072         struct gsc_dev *gsc;
1073         struct resource *res;
1074         struct gsc_driverdata *drv_data = gsc_get_drv_data(pdev);
1075         struct device *dev = &pdev->dev;
1076         int ret = 0;
1077
1078         gsc = devm_kzalloc(dev, sizeof(struct gsc_dev), GFP_KERNEL);
1079         if (!gsc)
1080                 return -ENOMEM;
1081
1082         if (dev->of_node)
1083                 gsc->id = of_alias_get_id(pdev->dev.of_node, "gsc");
1084         else
1085                 gsc->id = pdev->id;
1086
1087         if (gsc->id < 0 || gsc->id >= drv_data->num_entities) {
1088                 dev_err(dev, "Invalid platform device id: %d\n", gsc->id);
1089                 return -EINVAL;
1090         }
1091
1092         gsc->variant = drv_data->variant[gsc->id];
1093         gsc->pdev = pdev;
1094         gsc->pdata = dev->platform_data;
1095
1096         init_waitqueue_head(&gsc->irq_queue);
1097         spin_lock_init(&gsc->slock);
1098         mutex_init(&gsc->lock);
1099         gsc->clock = ERR_PTR(-EINVAL);
1100
1101         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1102         gsc->regs = devm_ioremap_resource(dev, res);
1103         if (IS_ERR(gsc->regs))
1104                 return PTR_ERR(gsc->regs);
1105
1106         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1107         if (!res) {
1108                 dev_err(dev, "failed to get IRQ resource\n");
1109                 return -ENXIO;
1110         }
1111
1112         ret = gsc_clk_get(gsc);
1113         if (ret)
1114                 return ret;
1115
1116         ret = devm_request_irq(dev, res->start, gsc_irq_handler,
1117                                 0, pdev->name, gsc);
1118         if (ret) {
1119                 dev_err(dev, "failed to install irq (%d)\n", ret);
1120                 goto err_clk;
1121         }
1122
1123         ret = gsc_register_m2m_device(gsc);
1124         if (ret)
1125                 goto err_clk;
1126
1127         platform_set_drvdata(pdev, gsc);
1128         pm_runtime_enable(dev);
1129         ret = pm_runtime_get_sync(&pdev->dev);
1130         if (ret < 0)
1131                 goto err_m2m;
1132
1133         /* Initialize continious memory allocator */
1134         gsc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1135         if (IS_ERR(gsc->alloc_ctx)) {
1136                 ret = PTR_ERR(gsc->alloc_ctx);
1137                 goto err_pm;
1138         }
1139
1140         dev_dbg(dev, "gsc-%d registered successfully\n", gsc->id);
1141
1142         pm_runtime_put(dev);
1143         return 0;
1144 err_pm:
1145         pm_runtime_put(dev);
1146 err_m2m:
1147         gsc_unregister_m2m_device(gsc);
1148 err_clk:
1149         gsc_clk_put(gsc);
1150         return ret;
1151 }
1152
1153 static int gsc_remove(struct platform_device *pdev)
1154 {
1155         struct gsc_dev *gsc = platform_get_drvdata(pdev);
1156
1157         gsc_unregister_m2m_device(gsc);
1158
1159         vb2_dma_contig_cleanup_ctx(gsc->alloc_ctx);
1160         pm_runtime_disable(&pdev->dev);
1161         gsc_clk_put(gsc);
1162
1163         dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1164         return 0;
1165 }
1166
1167 static int gsc_runtime_resume(struct device *dev)
1168 {
1169         struct gsc_dev *gsc = dev_get_drvdata(dev);
1170         int ret = 0;
1171
1172         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1173
1174         ret = clk_enable(gsc->clock);
1175         if (ret)
1176                 return ret;
1177
1178         gsc_hw_set_sw_reset(gsc);
1179         gsc_wait_reset(gsc);
1180
1181         return gsc_m2m_resume(gsc);
1182 }
1183
1184 static int gsc_runtime_suspend(struct device *dev)
1185 {
1186         struct gsc_dev *gsc = dev_get_drvdata(dev);
1187         int ret = 0;
1188
1189         ret = gsc_m2m_suspend(gsc);
1190         if (!ret)
1191                 clk_disable(gsc->clock);
1192
1193         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1194         return ret;
1195 }
1196
1197 static int gsc_resume(struct device *dev)
1198 {
1199         struct gsc_dev *gsc = dev_get_drvdata(dev);
1200         unsigned long flags;
1201
1202         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1203
1204         /* Do not resume if the device was idle before system suspend */
1205         spin_lock_irqsave(&gsc->slock, flags);
1206         if (!test_and_clear_bit(ST_SUSPEND, &gsc->state) ||
1207             !gsc_m2m_active(gsc)) {
1208                 spin_unlock_irqrestore(&gsc->slock, flags);
1209                 return 0;
1210         }
1211         gsc_hw_set_sw_reset(gsc);
1212         gsc_wait_reset(gsc);
1213
1214         spin_unlock_irqrestore(&gsc->slock, flags);
1215
1216         return gsc_m2m_resume(gsc);
1217 }
1218
1219 static int gsc_suspend(struct device *dev)
1220 {
1221         struct gsc_dev *gsc = dev_get_drvdata(dev);
1222
1223         pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1224
1225         if (test_and_set_bit(ST_SUSPEND, &gsc->state))
1226                 return 0;
1227
1228         return gsc_m2m_suspend(gsc);
1229 }
1230
1231 static const struct dev_pm_ops gsc_pm_ops = {
1232         .suspend                = gsc_suspend,
1233         .resume                 = gsc_resume,
1234         .runtime_suspend        = gsc_runtime_suspend,
1235         .runtime_resume         = gsc_runtime_resume,
1236 };
1237
1238 static struct platform_driver gsc_driver = {
1239         .probe          = gsc_probe,
1240         .remove         = gsc_remove,
1241         .id_table       = gsc_driver_ids,
1242         .driver = {
1243                 .name   = GSC_MODULE_NAME,
1244                 .owner  = THIS_MODULE,
1245                 .pm     = &gsc_pm_ops,
1246                 .of_match_table = exynos_gsc_match,
1247         }
1248 };
1249
1250 module_platform_driver(gsc_driver);
1251
1252 MODULE_AUTHOR("Hyunwong Kim <khw0178.kim@samsung.com>");
1253 MODULE_DESCRIPTION("Samsung EXYNOS5 Soc series G-Scaler driver");
1254 MODULE_LICENSE("GPL");