drivers/gpu/drm/exynos/exynos_drm_scaler.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2017 Samsung Electronics Co.Ltd
   4  * Author:
   5  *      Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/component.h>
  10 #include <linux/err.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/io.h>
  13 #include <linux/kernel.h>
  14 #include <linux/of_device.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/pm_runtime.h>
  17
  18 #include <drm/drm_fourcc.h>
  19 #include <drm/exynos_drm.h>
  20
  21 #include "exynos_drm_drv.h"
  22 #include "exynos_drm_fb.h"
  23 #include "exynos_drm_ipp.h"
  24 #include "regs-scaler.h"
  25
  26 #define scaler_read(offset)             readl(scaler->regs + (offset))
  27 #define scaler_write(cfg, offset)       writel(cfg, scaler->regs + (offset))
  28 #define SCALER_MAX_CLK                  4
  29 #define SCALER_AUTOSUSPEND_DELAY        2000
  30 #define SCALER_RESET_WAIT_RETRIES       100
  31
  32 struct scaler_data {
  33         const char      *clk_name[SCALER_MAX_CLK];
  34         unsigned int    num_clk;
  35         const struct exynos_drm_ipp_formats *formats;
  36         unsigned int    num_formats;
  37 };
  38
  39 struct scaler_context {
  40         struct exynos_drm_ipp           ipp;
  41         struct drm_device               *drm_dev;
  42         void                            *dma_priv;
  43         struct device                   *dev;
  44         void __iomem                    *regs;
  45         struct clk                      *clock[SCALER_MAX_CLK];
  46         struct exynos_drm_ipp_task      *task;
  47         const struct scaler_data        *scaler_data;
  48 };
  49
  50 struct scaler_format {
  51         u32     drm_fmt;
  52         u32     internal_fmt;
  53         u32     chroma_tile_w;
  54         u32     chroma_tile_h;
  55 };
  56
  57 static const struct scaler_format scaler_formats[] = {
  58         { DRM_FORMAT_NV12, SCALER_YUV420_2P_UV, 8, 8 },
  59         { DRM_FORMAT_NV21, SCALER_YUV420_2P_VU, 8, 8 },
  60         { DRM_FORMAT_YUV420, SCALER_YUV420_3P, 8, 8 },
  61         { DRM_FORMAT_YUYV, SCALER_YUV422_1P_YUYV, 16, 16 },
  62         { DRM_FORMAT_UYVY, SCALER_YUV422_1P_UYVY, 16, 16 },
  63         { DRM_FORMAT_YVYU, SCALER_YUV422_1P_YVYU, 16, 16 },
  64         { DRM_FORMAT_NV16, SCALER_YUV422_2P_UV, 8, 16 },
  65         { DRM_FORMAT_NV61, SCALER_YUV422_2P_VU, 8, 16 },
  66         { DRM_FORMAT_YUV422, SCALER_YUV422_3P, 8, 16 },
  67         { DRM_FORMAT_NV24, SCALER_YUV444_2P_UV, 16, 16 },
  68         { DRM_FORMAT_NV42, SCALER_YUV444_2P_VU, 16, 16 },
  69         { DRM_FORMAT_YUV444, SCALER_YUV444_3P, 16, 16 },
  70         { DRM_FORMAT_RGB565, SCALER_RGB_565, 0, 0 },
  71         { DRM_FORMAT_XRGB1555, SCALER_ARGB1555, 0, 0 },
  72         { DRM_FORMAT_ARGB1555, SCALER_ARGB1555, 0, 0 },
  73         { DRM_FORMAT_XRGB4444, SCALER_ARGB4444, 0, 0 },
  74         { DRM_FORMAT_ARGB4444, SCALER_ARGB4444, 0, 0 },
  75         { DRM_FORMAT_XRGB8888, SCALER_ARGB8888, 0, 0 },
  76         { DRM_FORMAT_ARGB8888, SCALER_ARGB8888, 0, 0 },
  77         { DRM_FORMAT_RGBX8888, SCALER_RGBA8888, 0, 0 },
  78         { DRM_FORMAT_RGBA8888, SCALER_RGBA8888, 0, 0 },
  79 };
  80
  81 static const struct scaler_format *scaler_get_format(u32 drm_fmt)
  82 {
  83         int i;
  84
  85         for (i = 0; i < ARRAY_SIZE(scaler_formats); i++)
  86                 if (scaler_formats[i].drm_fmt == drm_fmt)
  87                         return &scaler_formats[i];
  88
  89         return NULL;
  90 }
  91
  92 static inline int scaler_reset(struct scaler_context *scaler)
  93 {
  94         int retry = SCALER_RESET_WAIT_RETRIES;
  95
  96         scaler_write(SCALER_CFG_SOFT_RESET, SCALER_CFG);
  97         do {
  98                 cpu_relax();
  99         } while (--retry > 1 &&
 100                  scaler_read(SCALER_CFG) & SCALER_CFG_SOFT_RESET);
 101         do {
 102                 cpu_relax();
 103                 scaler_write(1, SCALER_INT_EN);
 104         } while (--retry > 0 && scaler_read(SCALER_INT_EN) != 1);
 105
 106         return retry ? 0 : -EIO;
 107 }
 108
 109 static inline void scaler_enable_int(struct scaler_context *scaler)
 110 {
 111         u32 val;
 112
 113         val = SCALER_INT_EN_TIMEOUT |
 114                 SCALER_INT_EN_ILLEGAL_BLEND |
 115                 SCALER_INT_EN_ILLEGAL_RATIO |
 116                 SCALER_INT_EN_ILLEGAL_DST_HEIGHT |
 117                 SCALER_INT_EN_ILLEGAL_DST_WIDTH |
 118                 SCALER_INT_EN_ILLEGAL_DST_V_POS |
 119                 SCALER_INT_EN_ILLEGAL_DST_H_POS |
 120                 SCALER_INT_EN_ILLEGAL_DST_C_SPAN |
 121                 SCALER_INT_EN_ILLEGAL_DST_Y_SPAN |
 122                 SCALER_INT_EN_ILLEGAL_DST_CR_BASE |
 123                 SCALER_INT_EN_ILLEGAL_DST_CB_BASE |
 124                 SCALER_INT_EN_ILLEGAL_DST_Y_BASE |
 125                 SCALER_INT_EN_ILLEGAL_DST_COLOR |
 126                 SCALER_INT_EN_ILLEGAL_SRC_HEIGHT |
 127                 SCALER_INT_EN_ILLEGAL_SRC_WIDTH |
 128                 SCALER_INT_EN_ILLEGAL_SRC_CV_POS |
 129                 SCALER_INT_EN_ILLEGAL_SRC_CH_POS |
 130                 SCALER_INT_EN_ILLEGAL_SRC_YV_POS |
 131                 SCALER_INT_EN_ILLEGAL_SRC_YH_POS |
 132                 SCALER_INT_EN_ILLEGAL_DST_SPAN |
 133                 SCALER_INT_EN_ILLEGAL_SRC_Y_SPAN |
 134                 SCALER_INT_EN_ILLEGAL_SRC_CR_BASE |
 135                 SCALER_INT_EN_ILLEGAL_SRC_CB_BASE |
 136                 SCALER_INT_EN_ILLEGAL_SRC_Y_BASE |
 137                 SCALER_INT_EN_ILLEGAL_SRC_COLOR |
 138                 SCALER_INT_EN_FRAME_END;
 139         scaler_write(val, SCALER_INT_EN);
 140 }
 141
 142 static inline void scaler_set_src_fmt(struct scaler_context *scaler,
 143         u32 src_fmt, u32 tile)
 144 {
 145         u32 val;
 146
 147         val = SCALER_SRC_CFG_SET_COLOR_FORMAT(src_fmt) | (tile << 10);
 148         scaler_write(val, SCALER_SRC_CFG);
 149 }
 150
 151 static inline void scaler_set_src_base(struct scaler_context *scaler,
 152         struct exynos_drm_ipp_buffer *src_buf)
 153 {
 154         static unsigned int bases[] = {
 155                 SCALER_SRC_Y_BASE,
 156                 SCALER_SRC_CB_BASE,
 157                 SCALER_SRC_CR_BASE,
 158         };
 159         int i;
 160
 161         for (i = 0; i < src_buf->format->num_planes; ++i)
 162                 scaler_write(src_buf->dma_addr[i], bases[i]);
 163 }
 164
 165 static inline void scaler_set_src_span(struct scaler_context *scaler,
 166         struct exynos_drm_ipp_buffer *src_buf)
 167 {
 168         u32 val;
 169
 170         val = SCALER_SRC_SPAN_SET_Y_SPAN(src_buf->buf.pitch[0] /
 171                 src_buf->format->cpp[0]);
 172
 173         if (src_buf->format->num_planes > 1)
 174                 val |= SCALER_SRC_SPAN_SET_C_SPAN(src_buf->buf.pitch[1]);
 175
 176         scaler_write(val, SCALER_SRC_SPAN);
 177 }
 178
 179 static inline void scaler_set_src_luma_chroma_pos(struct scaler_context *scaler,
 180                         struct drm_exynos_ipp_task_rect *src_pos,
 181                         const struct scaler_format *fmt)
 182 {
 183         u32 val;
 184
 185         val = SCALER_SRC_Y_POS_SET_YH_POS(src_pos->x << 2);
 186         val |=  SCALER_SRC_Y_POS_SET_YV_POS(src_pos->y << 2);
 187         scaler_write(val, SCALER_SRC_Y_POS);
 188         val = SCALER_SRC_C_POS_SET_CH_POS(
 189                 (src_pos->x * fmt->chroma_tile_w / 16) << 2);
 190         val |=  SCALER_SRC_C_POS_SET_CV_POS(
 191                 (src_pos->y * fmt->chroma_tile_h / 16) << 2);
 192         scaler_write(val, SCALER_SRC_C_POS);
 193 }
 194
 195 static inline void scaler_set_src_wh(struct scaler_context *scaler,
 196         struct drm_exynos_ipp_task_rect *src_pos)
 197 {
 198         u32 val;
 199
 200         val = SCALER_SRC_WH_SET_WIDTH(src_pos->w);
 201         val |= SCALER_SRC_WH_SET_HEIGHT(src_pos->h);
 202         scaler_write(val, SCALER_SRC_WH);
 203 }
 204
 205 static inline void scaler_set_dst_fmt(struct scaler_context *scaler,
 206         u32 dst_fmt)
 207 {
 208         u32 val;
 209
 210         val = SCALER_DST_CFG_SET_COLOR_FORMAT(dst_fmt);
 211         scaler_write(val, SCALER_DST_CFG);
 212 }
 213
 214 static inline void scaler_set_dst_base(struct scaler_context *scaler,
 215         struct exynos_drm_ipp_buffer *dst_buf)
 216 {
 217         static unsigned int bases[] = {
 218                 SCALER_DST_Y_BASE,
 219                 SCALER_DST_CB_BASE,
 220                 SCALER_DST_CR_BASE,
 221         };
 222         int i;
 223
 224         for (i = 0; i < dst_buf->format->num_planes; ++i)
 225                 scaler_write(dst_buf->dma_addr[i], bases[i]);
 226 }
 227
 228 static inline void scaler_set_dst_span(struct scaler_context *scaler,
 229         struct exynos_drm_ipp_buffer *dst_buf)
 230 {
 231         u32 val;
 232
 233         val = SCALER_DST_SPAN_SET_Y_SPAN(dst_buf->buf.pitch[0] /
 234                 dst_buf->format->cpp[0]);
 235
 236         if (dst_buf->format->num_planes > 1)
 237                 val |= SCALER_DST_SPAN_SET_C_SPAN(dst_buf->buf.pitch[1]);
 238
 239         scaler_write(val, SCALER_DST_SPAN);
 240 }
 241
 242 static inline void scaler_set_dst_luma_pos(struct scaler_context *scaler,
 243         struct drm_exynos_ipp_task_rect *dst_pos)
 244 {
 245         u32 val;
 246
 247         val = SCALER_DST_WH_SET_WIDTH(dst_pos->w);
 248         val |= SCALER_DST_WH_SET_HEIGHT(dst_pos->h);
 249         scaler_write(val, SCALER_DST_WH);
 250 }
 251
 252 static inline void scaler_set_dst_wh(struct scaler_context *scaler,
 253         struct drm_exynos_ipp_task_rect *dst_pos)
 254 {
 255         u32 val;
 256
 257         val = SCALER_DST_POS_SET_H_POS(dst_pos->x);
 258         val |= SCALER_DST_POS_SET_V_POS(dst_pos->y);
 259         scaler_write(val, SCALER_DST_POS);
 260 }
 261
 262 static inline void scaler_set_hv_ratio(struct scaler_context *scaler,
 263         unsigned int rotation,
 264         struct drm_exynos_ipp_task_rect *src_pos,
 265         struct drm_exynos_ipp_task_rect *dst_pos)
 266 {
 267         u32 val, h_ratio, v_ratio;
 268
 269         if (drm_rotation_90_or_270(rotation)) {
 270                 h_ratio = (src_pos->h << 16) / dst_pos->w;
 271                 v_ratio = (src_pos->w << 16) / dst_pos->h;
 272         } else {
 273                 h_ratio = (src_pos->w << 16) / dst_pos->w;
 274                 v_ratio = (src_pos->h << 16) / dst_pos->h;
 275         }
 276
 277         val = SCALER_H_RATIO_SET(h_ratio);
 278         scaler_write(val, SCALER_H_RATIO);
 279
 280         val = SCALER_V_RATIO_SET(v_ratio);
 281         scaler_write(val, SCALER_V_RATIO);
 282 }
 283
 284 static inline void scaler_set_rotation(struct scaler_context *scaler,
 285         unsigned int rotation)
 286 {
 287         u32 val = 0;
 288
 289         if (rotation & DRM_MODE_ROTATE_90)
 290                 val |= SCALER_ROT_CFG_SET_ROTMODE(SCALER_ROT_MODE_90);
 291         else if (rotation & DRM_MODE_ROTATE_180)
 292                 val |= SCALER_ROT_CFG_SET_ROTMODE(SCALER_ROT_MODE_180);
 293         else if (rotation & DRM_MODE_ROTATE_270)
 294                 val |= SCALER_ROT_CFG_SET_ROTMODE(SCALER_ROT_MODE_270);
 295         if (rotation & DRM_MODE_REFLECT_X)
 296                 val |= SCALER_ROT_CFG_FLIP_X_EN;
 297         if (rotation & DRM_MODE_REFLECT_Y)
 298                 val |= SCALER_ROT_CFG_FLIP_Y_EN;
 299         scaler_write(val, SCALER_ROT_CFG);
 300 }
 301
 302 static inline void scaler_set_csc(struct scaler_context *scaler,
 303         const struct drm_format_info *fmt)
 304 {
 305         static const u32 csc_mtx[2][3][3] = {
 306                 { /* YCbCr to RGB */
 307                         {0x254, 0x000, 0x331},
 308                         {0x254, 0xf38, 0xe60},
 309                         {0x254, 0x409, 0x000},
 310                 },
 311                 { /* RGB to YCbCr */
 312                         {0x084, 0x102, 0x032},
 313                         {0xfb4, 0xf6b, 0x0e1},
 314                         {0x0e1, 0xf44, 0xfdc},
 315                 },
 316         };
 317         int i, j, dir;
 318
 319         switch (fmt->format) {
 320         case DRM_FORMAT_RGB565:
 321         case DRM_FORMAT_XRGB1555:
 322         case DRM_FORMAT_ARGB1555:
 323         case DRM_FORMAT_XRGB4444:
 324         case DRM_FORMAT_ARGB4444:
 325         case DRM_FORMAT_XRGB8888:
 326         case DRM_FORMAT_ARGB8888:
 327         case DRM_FORMAT_RGBX8888:
 328         case DRM_FORMAT_RGBA8888:
 329                 dir = 1;
 330                 break;
 331         default:
 332                 dir = 0;
 333         }
 334
 335         for (i = 0; i < 3; i++)
 336                 for (j = 0; j < 3; j++)
 337                         scaler_write(csc_mtx[dir][i][j], SCALER_CSC_COEF(j, i));
 338 }
 339
 340 static inline void scaler_set_timer(struct scaler_context *scaler,
 341         unsigned int timer, unsigned int divider)
 342 {
 343         u32 val;
 344
 345         val = SCALER_TIMEOUT_CTRL_TIMER_ENABLE;
 346         val |= SCALER_TIMEOUT_CTRL_SET_TIMER_VALUE(timer);
 347         val |= SCALER_TIMEOUT_CTRL_SET_TIMER_DIV(divider);
 348         scaler_write(val, SCALER_TIMEOUT_CTRL);
 349 }
 350
 351 static inline void scaler_start_hw(struct scaler_context *scaler)
 352 {
 353         scaler_write(SCALER_CFG_START_CMD, SCALER_CFG);
 354 }
 355
 356 static int scaler_commit(struct exynos_drm_ipp *ipp,
 357                           struct exynos_drm_ipp_task *task)
 358 {
 359         struct scaler_context *scaler =
 360                         container_of(ipp, struct scaler_context, ipp);
 361
 362         struct drm_exynos_ipp_task_rect *src_pos = &task->src.rect;
 363         struct drm_exynos_ipp_task_rect *dst_pos = &task->dst.rect;
 364         const struct scaler_format *src_fmt, *dst_fmt;
 365
 366         src_fmt = scaler_get_format(task->src.buf.fourcc);
 367         dst_fmt = scaler_get_format(task->dst.buf.fourcc);
 368
 369         pm_runtime_get_sync(scaler->dev);
 370         if (scaler_reset(scaler)) {
 371                 pm_runtime_put(scaler->dev);
 372                 return -EIO;
 373         }
 374
 375         scaler->task = task;
 376
 377         scaler_set_src_fmt(
 378                 scaler, src_fmt->internal_fmt, task->src.buf.modifier != 0);
 379         scaler_set_src_base(scaler, &task->src);
 380         scaler_set_src_span(scaler, &task->src);
 381         scaler_set_src_luma_chroma_pos(scaler, src_pos, src_fmt);
 382         scaler_set_src_wh(scaler, src_pos);
 383
 384         scaler_set_dst_fmt(scaler, dst_fmt->internal_fmt);
 385         scaler_set_dst_base(scaler, &task->dst);
 386         scaler_set_dst_span(scaler, &task->dst);
 387         scaler_set_dst_luma_pos(scaler, dst_pos);
 388         scaler_set_dst_wh(scaler, dst_pos);
 389
 390         scaler_set_hv_ratio(scaler, task->transform.rotation, src_pos, dst_pos);
 391         scaler_set_rotation(scaler, task->transform.rotation);
 392
 393         scaler_set_csc(scaler, task->src.format);
 394
 395         scaler_set_timer(scaler, 0xffff, 0xf);
 396
 397         scaler_enable_int(scaler);
 398         scaler_start_hw(scaler);
 399
 400         return 0;
 401 }
 402
 403 static struct exynos_drm_ipp_funcs ipp_funcs = {
 404         .commit = scaler_commit,
 405 };
 406
 407 static inline void scaler_disable_int(struct scaler_context *scaler)
 408 {
 409         scaler_write(0, SCALER_INT_EN);
 410 }
 411
 412 static inline u32 scaler_get_int_status(struct scaler_context *scaler)
 413 {
 414         u32 val = scaler_read(SCALER_INT_STATUS);
 415
 416         scaler_write(val, SCALER_INT_STATUS);
 417
 418         return val;
 419 }
 420
 421 static inline int scaler_task_done(u32 val)
 422 {
 423         return val & SCALER_INT_STATUS_FRAME_END ? 0 : -EINVAL;
 424 }
 425
 426 static irqreturn_t scaler_irq_handler(int irq, void *arg)
 427 {
 428         struct scaler_context *scaler = arg;
 429
 430         u32 val = scaler_get_int_status(scaler);
 431
 432         scaler_disable_int(scaler);
 433
 434         if (scaler->task) {
 435                 struct exynos_drm_ipp_task *task = scaler->task;
 436
 437                 scaler->task = NULL;
 438                 pm_runtime_mark_last_busy(scaler->dev);
 439                 pm_runtime_put_autosuspend(scaler->dev);
 440                 exynos_drm_ipp_task_done(task, scaler_task_done(val));
 441         }
 442
 443         return IRQ_HANDLED;
 444 }
 445
 446 static int scaler_bind(struct device *dev, struct device *master, void *data)
 447 {
 448         struct scaler_context *scaler = dev_get_drvdata(dev);
 449         struct drm_device *drm_dev = data;
 450         struct exynos_drm_ipp *ipp = &scaler->ipp;
 451
 452         scaler->drm_dev = drm_dev;
 453         ipp->drm_dev = drm_dev;
 454         exynos_drm_register_dma(drm_dev, dev, &scaler->dma_priv);
 455
 456         exynos_drm_ipp_register(dev, ipp, &ipp_funcs,
 457                         DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE |
 458                         DRM_EXYNOS_IPP_CAP_SCALE | DRM_EXYNOS_IPP_CAP_CONVERT,
 459                         scaler->scaler_data->formats,
 460                         scaler->scaler_data->num_formats, "scaler");
 461
 462         dev_info(dev, "The exynos scaler has been probed successfully\n");
 463
 464         return 0;
 465 }
 466
 467 static void scaler_unbind(struct device *dev, struct device *master,
 468                         void *data)
 469 {
 470         struct scaler_context *scaler = dev_get_drvdata(dev);
 471         struct exynos_drm_ipp *ipp = &scaler->ipp;
 472
 473         exynos_drm_ipp_unregister(dev, ipp);
 474         exynos_drm_unregister_dma(scaler->drm_dev, scaler->dev,
 475                                   &scaler->dma_priv);
 476 }
 477
 478 static const struct component_ops scaler_component_ops = {
 479         .bind   = scaler_bind,
 480         .unbind = scaler_unbind,
 481 };
 482
 483 static int scaler_probe(struct platform_device *pdev)
 484 {
 485         struct device *dev = &pdev->dev;
 486         struct resource *regs_res;
 487         struct scaler_context *scaler;
 488         int irq;
 489         int ret, i;
 490
 491         scaler = devm_kzalloc(dev, sizeof(*scaler), GFP_KERNEL);
 492         if (!scaler)
 493                 return -ENOMEM;
 494
 495         scaler->scaler_data =
 496                 (struct scaler_data *)of_device_get_match_data(dev);
 497
 498         scaler->dev = dev;
 499         regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 500         scaler->regs = devm_ioremap_resource(dev, regs_res);
 501         if (IS_ERR(scaler->regs))
 502                 return PTR_ERR(scaler->regs);
 503
 504         irq = platform_get_irq(pdev, 0);
 505         if (irq < 0)
 506                 return irq;
 507
 508         ret = devm_request_threaded_irq(dev, irq, NULL, scaler_irq_handler,
 509                                         IRQF_ONESHOT, "drm_scaler", scaler);
 510         if (ret < 0) {
 511                 dev_err(dev, "failed to request irq\n");
 512                 return ret;
 513         }
 514
 515         for (i = 0; i < scaler->scaler_data->num_clk; ++i) {
 516                 scaler->clock[i] = devm_clk_get(dev,
 517                                               scaler->scaler_data->clk_name[i]);
 518                 if (IS_ERR(scaler->clock[i])) {
 519                         dev_err(dev, "failed to get clock\n");
 520                         return PTR_ERR(scaler->clock[i]);
 521                 }
 522         }
 523
 524         pm_runtime_use_autosuspend(dev);
 525         pm_runtime_set_autosuspend_delay(dev, SCALER_AUTOSUSPEND_DELAY);
 526         pm_runtime_enable(dev);
 527         platform_set_drvdata(pdev, scaler);
 528
 529         ret = component_add(dev, &scaler_component_ops);
 530         if (ret)
 531                 goto err_ippdrv_register;
 532
 533         return 0;
 534
 535 err_ippdrv_register:
 536         pm_runtime_dont_use_autosuspend(dev);
 537         pm_runtime_disable(dev);
 538         return ret;
 539 }
 540
 541 static int scaler_remove(struct platform_device *pdev)
 542 {
 543         struct device *dev = &pdev->dev;
 544
 545         component_del(dev, &scaler_component_ops);
 546         pm_runtime_dont_use_autosuspend(dev);
 547         pm_runtime_disable(dev);
 548
 549         return 0;
 550 }
 551
 552 #ifdef CONFIG_PM
 553
 554 static int clk_disable_unprepare_wrapper(struct clk *clk)
 555 {
 556         clk_disable_unprepare(clk);
 557
 558         return 0;
 559 }
 560
 561 static int scaler_clk_ctrl(struct scaler_context *scaler, bool enable)
 562 {
 563         int (*clk_fun)(struct clk *clk), i;
 564
 565         clk_fun = enable ? clk_prepare_enable : clk_disable_unprepare_wrapper;
 566
 567         for (i = 0; i < scaler->scaler_data->num_clk; ++i)
 568                 clk_fun(scaler->clock[i]);
 569
 570         return 0;
 571 }
 572
 573 static int scaler_runtime_suspend(struct device *dev)
 574 {
 575         struct scaler_context *scaler = dev_get_drvdata(dev);
 576
 577         return  scaler_clk_ctrl(scaler, false);
 578 }
 579
 580 static int scaler_runtime_resume(struct device *dev)
 581 {
 582         struct scaler_context *scaler = dev_get_drvdata(dev);
 583
 584         return  scaler_clk_ctrl(scaler, true);
 585 }
 586 #endif
 587
 588 static const struct dev_pm_ops scaler_pm_ops = {
 589         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 590                                 pm_runtime_force_resume)
 591         SET_RUNTIME_PM_OPS(scaler_runtime_suspend, scaler_runtime_resume, NULL)
 592 };
 593
 594 static const struct drm_exynos_ipp_limit scaler_5420_two_pixel_hv_limits[] = {
 595         { IPP_SIZE_LIMIT(BUFFER, .h = { 16, SZ_8K }, .v = { 16, SZ_8K }) },
 596         { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) },
 597         { IPP_SCALE_LIMIT(.h = { 65536 * 1 / 4, 65536 * 16 },
 598                           .v = { 65536 * 1 / 4, 65536 * 16 }) },
 599 };
 600
 601 static const struct drm_exynos_ipp_limit scaler_5420_two_pixel_h_limits[] = {
 602         { IPP_SIZE_LIMIT(BUFFER, .h = { 16, SZ_8K }, .v = { 16, SZ_8K }) },
 603         { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 1) },
 604         { IPP_SCALE_LIMIT(.h = { 65536 * 1 / 4, 65536 * 16 },
 605                           .v = { 65536 * 1 / 4, 65536 * 16 }) },
 606 };
 607
 608 static const struct drm_exynos_ipp_limit scaler_5420_one_pixel_limits[] = {
 609         { IPP_SIZE_LIMIT(BUFFER, .h = { 16, SZ_8K }, .v = { 16, SZ_8K }) },
 610         { IPP_SCALE_LIMIT(.h = { 65536 * 1 / 4, 65536 * 16 },
 611                           .v = { 65536 * 1 / 4, 65536 * 16 }) },
 612 };
 613
 614 static const struct drm_exynos_ipp_limit scaler_5420_tile_limits[] = {
 615         { IPP_SIZE_LIMIT(BUFFER, .h = { 16, SZ_8K }, .v = { 16, SZ_8K })},
 616         { IPP_SIZE_LIMIT(AREA, .h.align = 16, .v.align = 16) },
 617         { IPP_SCALE_LIMIT(.h = {1, 1}, .v = {1, 1})},
 618         { }
 619 };
 620
 621 #define IPP_SRCDST_TILE_FORMAT(f, l)    \
 622         IPP_SRCDST_MFORMAT(f, DRM_FORMAT_MOD_SAMSUNG_16_16_TILE, (l))
 623
 624 static const struct exynos_drm_ipp_formats exynos5420_formats[] = {
 625         /* SCALER_YUV420_2P_UV */
 626         { IPP_SRCDST_FORMAT(NV21, scaler_5420_two_pixel_hv_limits) },
 627
 628         /* SCALER_YUV420_2P_VU */
 629         { IPP_SRCDST_FORMAT(NV12, scaler_5420_two_pixel_hv_limits) },
 630
 631         /* SCALER_YUV420_3P */
 632         { IPP_SRCDST_FORMAT(YUV420, scaler_5420_two_pixel_hv_limits) },
 633
 634         /* SCALER_YUV422_1P_YUYV */
 635         { IPP_SRCDST_FORMAT(YUYV, scaler_5420_two_pixel_h_limits) },
 636
 637         /* SCALER_YUV422_1P_UYVY */
 638         { IPP_SRCDST_FORMAT(UYVY, scaler_5420_two_pixel_h_limits) },
 639
 640         /* SCALER_YUV422_1P_YVYU */
 641         { IPP_SRCDST_FORMAT(YVYU, scaler_5420_two_pixel_h_limits) },
 642
 643         /* SCALER_YUV422_2P_UV */
 644         { IPP_SRCDST_FORMAT(NV61, scaler_5420_two_pixel_h_limits) },
 645
 646         /* SCALER_YUV422_2P_VU */
 647         { IPP_SRCDST_FORMAT(NV16, scaler_5420_two_pixel_h_limits) },
 648
 649         /* SCALER_YUV422_3P */
 650         { IPP_SRCDST_FORMAT(YUV422, scaler_5420_two_pixel_h_limits) },
 651
 652         /* SCALER_YUV444_2P_UV */
 653         { IPP_SRCDST_FORMAT(NV42, scaler_5420_one_pixel_limits) },
 654
 655         /* SCALER_YUV444_2P_VU */
 656         { IPP_SRCDST_FORMAT(NV24, scaler_5420_one_pixel_limits) },
 657
 658         /* SCALER_YUV444_3P */
 659         { IPP_SRCDST_FORMAT(YUV444, scaler_5420_one_pixel_limits) },
 660
 661         /* SCALER_RGB_565 */
 662         { IPP_SRCDST_FORMAT(RGB565, scaler_5420_one_pixel_limits) },
 663
 664         /* SCALER_ARGB1555 */
 665         { IPP_SRCDST_FORMAT(XRGB1555, scaler_5420_one_pixel_limits) },
 666
 667         /* SCALER_ARGB1555 */
 668         { IPP_SRCDST_FORMAT(ARGB1555, scaler_5420_one_pixel_limits) },
 669
 670         /* SCALER_ARGB4444 */
 671         { IPP_SRCDST_FORMAT(XRGB4444, scaler_5420_one_pixel_limits) },
 672
 673         /* SCALER_ARGB4444 */
 674         { IPP_SRCDST_FORMAT(ARGB4444, scaler_5420_one_pixel_limits) },
 675
 676         /* SCALER_ARGB8888 */
 677         { IPP_SRCDST_FORMAT(XRGB8888, scaler_5420_one_pixel_limits) },
 678
 679         /* SCALER_ARGB8888 */
 680         { IPP_SRCDST_FORMAT(ARGB8888, scaler_5420_one_pixel_limits) },
 681
 682         /* SCALER_RGBA8888 */
 683         { IPP_SRCDST_FORMAT(RGBX8888, scaler_5420_one_pixel_limits) },
 684
 685         /* SCALER_RGBA8888 */
 686         { IPP_SRCDST_FORMAT(RGBA8888, scaler_5420_one_pixel_limits) },
 687
 688         /* SCALER_YUV420_2P_UV TILE */
 689         { IPP_SRCDST_TILE_FORMAT(NV21, scaler_5420_tile_limits) },
 690
 691         /* SCALER_YUV420_2P_VU TILE */
 692         { IPP_SRCDST_TILE_FORMAT(NV12, scaler_5420_tile_limits) },
 693
 694         /* SCALER_YUV420_3P TILE */
 695         { IPP_SRCDST_TILE_FORMAT(YUV420, scaler_5420_tile_limits) },
 696
 697         /* SCALER_YUV422_1P_YUYV TILE */
 698         { IPP_SRCDST_TILE_FORMAT(YUYV, scaler_5420_tile_limits) },
 699 };
 700
 701 static const struct scaler_data exynos5420_data = {
 702         .clk_name       = {"mscl"},
 703         .num_clk        = 1,
 704         .formats        = exynos5420_formats,
 705         .num_formats    = ARRAY_SIZE(exynos5420_formats),
 706 };
 707
 708 static const struct scaler_data exynos5433_data = {
 709         .clk_name       = {"pclk", "aclk", "aclk_xiu"},
 710         .num_clk        = 3,
 711         .formats        = exynos5420_formats, /* intentional */
 712         .num_formats    = ARRAY_SIZE(exynos5420_formats),
 713 };
 714
 715 static const struct of_device_id exynos_scaler_match[] = {
 716         {
 717                 .compatible = "samsung,exynos5420-scaler",
 718                 .data = &exynos5420_data,
 719         }, {
 720                 .compatible = "samsung,exynos5433-scaler",
 721                 .data = &exynos5433_data,
 722         }, {
 723         },
 724 };
 725 MODULE_DEVICE_TABLE(of, exynos_scaler_match);
 726
 727 struct platform_driver scaler_driver = {
 728         .probe          = scaler_probe,
 729         .remove         = scaler_remove,
 730         .driver         = {
 731                 .name   = "exynos-scaler",
 732                 .owner  = THIS_MODULE,
 733                 .pm     = &scaler_pm_ops,
 734                 .of_match_table = exynos_scaler_match,
 735         },
 736 };