drivers/gpu/drm/exynos/exynos_drm_fimd.c

   1 /* exynos_drm_fimd.c
   2  *
   3  * Copyright (C) 2011 Samsung Electronics Co.Ltd
   4  * Authors:
   5  *      Joonyoung Shim <jy0922.shim@samsung.com>
   6  *      Inki Dae <inki.dae@samsung.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  *
  13  */
  14 #include "drmP.h"
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/clk.h>
  20 #include <linux/pm_runtime.h>
  21
  22 #include <drm/exynos_drm.h>
  23 #include <plat/regs-fb-v4.h>
  24
  25 #include "exynos_drm_drv.h"
  26 #include "exynos_drm_crtc.h"
  27 #include "exynos_drm_fbdev.h"
  28
  29 /*
  30  * FIMD is stand for Fully Interactive Mobile Display and
  31  * as a display controller, it transfers contents drawn on memory
  32  * to a LCD Panel through Display Interfaces such as RGB or
  33  * CPU Interface.
  34  */
  35
  36 /* position control register for hardware window 0, 2 ~ 4.*/
  37 #define VIDOSD_A(win)           (VIDOSD_BASE + 0x00 + (win) * 16)
  38 #define VIDOSD_B(win)           (VIDOSD_BASE + 0x04 + (win) * 16)
  39 /* size control register for hardware window 0. */
  40 #define VIDOSD_C_SIZE_W0        (VIDOSD_BASE + 0x08)
  41 /* alpha control register for hardware window 1 ~ 4. */
  42 #define VIDOSD_C(win)           (VIDOSD_BASE + 0x18 + (win) * 16)
  43 /* size control register for hardware window 1 ~ 4. */
  44 #define VIDOSD_D(win)           (VIDOSD_BASE + 0x0C + (win) * 16)
  45
  46 #define VIDWx_BUF_START(win, buf)       (VIDW_BUF_START(buf) + (win) * 8)
  47 #define VIDWx_BUF_END(win, buf)         (VIDW_BUF_END(buf) + (win) * 8)
  48 #define VIDWx_BUF_SIZE(win, buf)        (VIDW_BUF_SIZE(buf) + (win) * 4)
  49
  50 /* color key control register for hardware window 1 ~ 4. */
  51 #define WKEYCON0_BASE(x)                ((WKEYCON0 + 0x140) + (x * 8))
  52 /* color key value register for hardware window 1 ~ 4. */
  53 #define WKEYCON1_BASE(x)                ((WKEYCON1 + 0x140) + (x * 8))
  54
  55 /* FIMD has totally five hardware windows. */
  56 #define WINDOWS_NR      5
  57
  58 #define get_fimd_context(dev)   platform_get_drvdata(to_platform_device(dev))
  59
  60 struct fimd_win_data {
  61         unsigned int            offset_x;
  62         unsigned int            offset_y;
  63         unsigned int            ovl_width;
  64         unsigned int            ovl_height;
  65         unsigned int            fb_width;
  66         unsigned int            fb_height;
  67         unsigned int            fb_pitch;
  68         unsigned int            bpp;
  69         dma_addr_t              dma_addr;
  70         void __iomem            *vaddr;
  71         unsigned int            buf_offsize;
  72         unsigned int            line_size;      /* bytes */
  73         bool                    enabled;
  74 };
  75
  76 struct fimd_context {
  77         struct exynos_drm_subdrv        subdrv;
  78         int                             irq;
  79         struct drm_crtc                 *crtc;
  80         struct clk                      *bus_clk;
  81         struct clk                      *lcd_clk;
  82         struct resource                 *regs_res;
  83         void __iomem                    *regs;
  84         void __iomem                    *regs_mie;
  85         struct fimd_win_data            win_data[WINDOWS_NR];
  86         unsigned int                    clkdiv[MAX_NR_PANELS];
  87         unsigned int                    default_win;
  88         unsigned long                   irq_flags;
  89         u32                             vidcon0;
  90         u32                             vidcon1;
  91         int                             idx;
  92         bool                            suspended;
  93         struct mutex                    lock;
  94
  95         struct exynos_drm_panel_info *panel;
  96 };
  97
  98 static bool fimd_display_is_connected(struct device *dev)
  99 {
 100         DRM_DEBUG_KMS("%s\n", __FILE__);
 101
 102         /* TODO. */
 103
 104         return true;
 105 }
 106
 107 static void *fimd_get_panel(struct device *dev)
 108 {
 109         struct fimd_context *ctx = get_fimd_context(dev);
 110
 111         DRM_DEBUG_KMS("%s\n", __FILE__);
 112
 113         return ctx->panel;
 114 }
 115
 116 static int fimd_check_timing(struct device *dev, void *timing)
 117 {
 118         struct fimd_context *ctx = get_fimd_context(dev);
 119         struct fb_videomode *check_timing = timing;
 120         int i;
 121
 122         DRM_DEBUG_KMS("%s\n", __FILE__);
 123
 124         for (i = 0;i< MAX_NR_PANELS;i++) {
 125                 if (ctx->panel[i].timing.xres == -1 &&
 126                          ctx->panel[i].timing.yres == -1)
 127                          break;
 128
 129                 if (ctx->panel[i].timing.xres == check_timing->xres &&
 130                          ctx->panel[i].timing.yres == check_timing->yres &&
 131                         ctx->panel[i].timing.refresh == check_timing->refresh
 132                         )
 133                         return 0;
 134         }
 135
 136         return -EINVAL;
 137 }
 138
 139 static int fimd_power_on(struct fimd_context *ctx, bool enable);
 140
 141 static int fimd_display_power_on(struct device *dev, int mode)
 142 {
 143         struct fimd_context *ctx = get_fimd_context(dev);
 144         bool enable;
 145
 146         DRM_DEBUG_KMS("%s\n", __FILE__);
 147
 148         switch (mode) {
 149         case DRM_MODE_DPMS_ON:
 150         case DRM_MODE_DPMS_STANDBY:
 151                 enable = true;
 152                 break;
 153         case DRM_MODE_DPMS_SUSPEND:
 154         case DRM_MODE_DPMS_OFF:
 155                 enable = false;
 156                 break;
 157         default:
 158                 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
 159                 return -EINVAL;
 160         }
 161
 162         fimd_power_on(ctx, enable);
 163
 164         return 0;
 165 }
 166
 167 static struct exynos_drm_display_ops fimd_display_ops = {
 168         .type = EXYNOS_DISPLAY_TYPE_LCD,
 169         .is_connected = fimd_display_is_connected,
 170         .get_panel = fimd_get_panel,
 171         .check_timing = fimd_check_timing,
 172         .power_on = fimd_display_power_on,
 173 };
 174
 175 static void fimd_apply(struct device *subdrv_dev)
 176 {
 177         struct fimd_context *ctx = get_fimd_context(subdrv_dev);
 178         struct exynos_drm_manager *mgr = ctx->subdrv.manager;
 179         struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
 180         struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
 181         struct fimd_win_data *win_data;
 182         int i;
 183
 184         DRM_DEBUG_KMS("%s\n", __FILE__);
 185
 186         for (i = 0; i < WINDOWS_NR; i++) {
 187                 win_data = &ctx->win_data[i];
 188                 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
 189                         ovl_ops->commit(subdrv_dev, i);
 190         }
 191
 192         if (mgr_ops && mgr_ops->commit)
 193                 mgr_ops->commit(subdrv_dev);
 194 }
 195
 196 static void fimd_commit(struct device *dev)
 197 {
 198         struct fimd_context *ctx = get_fimd_context(dev);
 199         struct exynos_drm_panel_info *panel = &ctx->panel[ctx->idx];
 200         struct fb_videomode *timing = &panel->timing;
 201         u32 val;
 202
 203         if (ctx->suspended)
 204                 return;
 205
 206         DRM_DEBUG_KMS("%s\n", __FILE__);
 207
 208         /* setup polarity values from machine code. */
 209         writel(ctx->vidcon1, ctx->regs + VIDCON1);
 210
 211         /* setup vertical timing values. */
 212         val = VIDTCON0_VBPD(timing->upper_margin - 1) |
 213                VIDTCON0_VFPD(timing->lower_margin - 1) |
 214                VIDTCON0_VSPW(timing->vsync_len - 1);
 215         writel(val, ctx->regs + VIDTCON0);
 216
 217         /* setup horizontal timing values.  */
 218         val = VIDTCON1_HBPD(timing->left_margin - 1) |
 219                VIDTCON1_HFPD(timing->right_margin - 1) |
 220                VIDTCON1_HSPW(timing->hsync_len - 1);
 221         writel(val, ctx->regs + VIDTCON1);
 222
 223         /* setup horizontal and vertical display size. */
 224         val = VIDTCON2_LINEVAL(timing->yres - 1) |
 225                VIDTCON2_HOZVAL(timing->xres - 1);
 226         writel(val, ctx->regs + VIDTCON2);
 227
 228         /* setup clock source, clock divider, enable dma. */
 229         val = ctx->vidcon0;
 230         val &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR);
 231
 232         if (ctx->clkdiv[ctx->idx] > 1)
 233                 val |= VIDCON0_CLKVAL_F(ctx->clkdiv[ctx->idx] - 1) | VIDCON0_CLKDIR;
 234         else
 235                 val &= ~VIDCON0_CLKDIR; /* 1:1 clock */
 236
 237         /*
 238          * fields of register with prefix '_F' would be updated
 239          * at vsync(same as dma start)
 240          */
 241         val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
 242         writel(val, ctx->regs + VIDCON0);
 243 }
 244
 245 static int fimd_enable_vblank(struct device *dev)
 246 {
 247         struct fimd_context *ctx = get_fimd_context(dev);
 248         u32 val;
 249
 250         DRM_DEBUG_KMS("%s\n", __FILE__);
 251
 252         if (ctx->suspended)
 253                 return -EPERM;
 254
 255         if (!test_and_set_bit(0, &ctx->irq_flags)) {
 256                 val = readl(ctx->regs + VIDINTCON0);
 257
 258                 val |= VIDINTCON0_INT_ENABLE;
 259                 val |= VIDINTCON0_INT_FRAME;
 260
 261                 val &= ~VIDINTCON0_FRAMESEL0_MASK;
 262                 val |= VIDINTCON0_FRAMESEL0_VSYNC;
 263                 val &= ~VIDINTCON0_FRAMESEL1_MASK;
 264                 val |= VIDINTCON0_FRAMESEL1_NONE;
 265
 266                 writel(val, ctx->regs + VIDINTCON0);
 267         }
 268
 269         return 0;
 270 }
 271
 272 static void fimd_disable_vblank(struct device *dev)
 273 {
 274         struct fimd_context *ctx = get_fimd_context(dev);
 275         u32 val;
 276
 277         DRM_DEBUG_KMS("%s\n", __FILE__);
 278
 279         if (ctx->suspended)
 280                 return;
 281
 282         if (test_and_clear_bit(0, &ctx->irq_flags)) {
 283                 val = readl(ctx->regs + VIDINTCON0);
 284
 285                 val &= ~VIDINTCON0_INT_FRAME;
 286                 val &= ~VIDINTCON0_INT_ENABLE;
 287
 288                 writel(val, ctx->regs + VIDINTCON0);
 289         }
 290 }
 291
 292 static struct exynos_drm_manager_ops fimd_manager_ops = {
 293         .apply = fimd_apply,
 294         .commit = fimd_commit,
 295         .enable_vblank = fimd_enable_vblank,
 296         .disable_vblank = fimd_disable_vblank,
 297 };
 298
 299 static void fimd_win_mode_set(struct device *dev,
 300                               struct exynos_drm_overlay *overlay)
 301 {
 302         struct fimd_context *ctx = get_fimd_context(dev);
 303         struct fimd_win_data *win_data;
 304         int win;
 305         unsigned long offset;
 306
 307         DRM_DEBUG_KMS("%s\n", __FILE__);
 308
 309         if (!overlay) {
 310                 dev_err(dev, "overlay is NULL\n");
 311                 return;
 312         }
 313
 314         win = overlay->zpos;
 315         if (win == DEFAULT_ZPOS)
 316                 win = ctx->default_win;
 317
 318         if (win < 0 || win > WINDOWS_NR)
 319                 return;
 320
 321         if(win == ctx->default_win) {
 322                 for(ctx->idx = 0;ctx->idx < MAX_NR_PANELS;ctx->idx++) {
 323                         if (ctx->panel[ctx->idx].timing.xres == -1 &&
 324                                 ctx->panel[ctx->idx].timing.yres == -1) {
 325                                         DRM_ERROR("Invalid panel parameters");
 326                                         ctx->idx = 0; /* Reset to first panel index*/
 327                                         break;
 328                                 }
 329                         if (ctx->panel[ctx->idx].timing.xres == overlay->fb_width &&
 330                                 ctx->panel[ctx->idx].timing.yres == overlay->fb_height)
 331                                         break;
 332                 }
 333         }
 334
 335         offset = overlay->fb_x * (overlay->bpp >> 3);
 336         offset += overlay->fb_y * overlay->fb_pitch;
 337
 338         DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n",
 339                 offset, overlay->fb_pitch);
 340
 341         win_data = &ctx->win_data[win];
 342
 343         win_data->offset_x = overlay->crtc_x;
 344         win_data->offset_y = overlay->crtc_y;
 345         win_data->ovl_width = overlay->crtc_width;
 346         win_data->ovl_height = overlay->crtc_height;
 347         win_data->fb_width = overlay->fb_width;
 348         win_data->fb_height = overlay->fb_height;
 349         win_data->fb_pitch = overlay->fb_pitch;
 350         win_data->dma_addr = overlay->dma_addr[0] + offset;
 351         win_data->vaddr = overlay->vaddr[0] + offset;
 352         win_data->bpp = overlay->bpp;
 353         win_data->buf_offsize = overlay->fb_pitch -
 354                 (overlay->fb_width * (overlay->bpp >> 3));
 355         win_data->line_size = overlay->fb_width * (overlay->bpp >> 3);
 356
 357         DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
 358                         win_data->offset_x, win_data->offset_y);
 359         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 360                         win_data->ovl_width, win_data->ovl_height);
 361         DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
 362                         (unsigned long)win_data->dma_addr,
 363                         (unsigned long)win_data->vaddr);
 364         DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
 365                         overlay->fb_width, overlay->crtc_width);
 366 }
 367
 368 static void fimd_win_set_pixfmt(struct device *dev, unsigned int win)
 369 {
 370         struct fimd_context *ctx = get_fimd_context(dev);
 371         struct fimd_win_data *win_data = &ctx->win_data[win];
 372         unsigned long val;
 373         unsigned long bytes;
 374
 375         DRM_DEBUG_KMS("%s\n", __FILE__);
 376
 377         val = WINCONx_ENWIN;
 378
 379         switch (win_data->bpp) {
 380         case 1:
 381                 val |= WINCON0_BPPMODE_1BPP;
 382                 val |= WINCONx_BITSWP;
 383                 bytes = win_data->fb_width >> 3;
 384                 break;
 385         case 2:
 386                 val |= WINCON0_BPPMODE_2BPP;
 387                 val |= WINCONx_BITSWP;
 388                 bytes = win_data->fb_width >> 2;
 389                 break;
 390         case 4:
 391                 val |= WINCON0_BPPMODE_4BPP;
 392                 val |= WINCONx_BITSWP;
 393                 bytes = win_data->fb_width >> 1;
 394                 break;
 395         case 8:
 396                 val |= WINCON0_BPPMODE_8BPP_PALETTE;
 397                 val |= WINCONx_BYTSWP;
 398                 bytes = win_data->fb_width;
 399                 break;
 400         case 16:
 401                 val |= WINCON0_BPPMODE_16BPP_565;
 402                 val |= WINCONx_HAWSWP;
 403                 bytes = win_data->fb_width << 1;
 404                 break;
 405         case 24:
 406                 val |= WINCON0_BPPMODE_24BPP_888;
 407                 val |= WINCONx_WSWP;
 408                 bytes = win_data->fb_width * 3;
 409                 break;
 410         case 32:
 411                 val |= WINCON1_BPPMODE_28BPP_A4888
 412                         | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
 413                 val |= WINCONx_WSWP;
 414                 bytes = win_data->fb_width << 2;
 415                 break;
 416         default:
 417                 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
 418                 bytes = win_data->fb_width * 3;
 419                 val |= WINCON0_BPPMODE_24BPP_888;
 420                 val |= WINCONx_WSWP;
 421                 break;
 422         }
 423
 424         /*
 425          * Adjust the burst size based on the number of bytes to be read.
 426          * Each WORD of the BURST is 8 bytes long. There are 3 BURST sizes
 427          * supported by fimd.
 428          * WINCONx_BURSTLEN_4WORD = 32 bytes
 429          * WINCONx_BURSTLEN_8WORD = 64 bytes
 430          * WINCONx_BURSTLEN_16WORD = 128 bytes
 431          */
 432         if (win_data->fb_width <= 64)
 433                 val |= WINCONx_BURSTLEN_4WORD;
 434         else
 435                 val |= WINCONx_BURSTLEN_16WORD;
 436
 437         DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp);
 438
 439         writel(val, ctx->regs + WINCON(win));
 440 }
 441
 442 static void fimd_win_set_colkey(struct device *dev, unsigned int win)
 443 {
 444         struct fimd_context *ctx = get_fimd_context(dev);
 445         unsigned int keycon0 = 0, keycon1 = 0;
 446
 447         DRM_DEBUG_KMS("%s\n", __FILE__);
 448
 449         keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
 450                         WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
 451
 452         keycon1 = WxKEYCON1_COLVAL(0xffffffff);
 453
 454         writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
 455         writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
 456 }
 457
 458 static void mie_set_6bit_dithering(struct fimd_context *ctx)
 459 {
 460         struct fb_videomode *timing = &ctx->panel->timing;
 461         unsigned long val;
 462         int i;
 463
 464         writel(MIE_HRESOL(timing->xres) | MIE_VRESOL(timing->yres) |
 465                                 MIE_MODE_UI, ctx->regs_mie + MIE_CTRL1);
 466
 467         writel(MIE_WINHADDR0(0) | MIE_WINHADDR1(timing->xres),
 468                                                 ctx->regs_mie + MIE_WINHADDR);
 469         writel(MIE_WINVADDR0(0) | MIE_WINVADDR1(timing->yres),
 470                                                 ctx->regs_mie + MIE_WINVADDR);
 471
 472         val = (timing->xres + timing->left_margin +
 473                         timing->right_margin + timing->hsync_len) *
 474               (timing->yres + timing->upper_margin +
 475                         timing->lower_margin + timing->vsync_len) /
 476                                                         (MIE_PWMCLKVAL + 1);
 477         writel(PWMCLKCNT(val), ctx->regs_mie + MIE_PWMCLKCNT);
 478
 479         writel((MIE_VBPD(timing->upper_margin)) |
 480                 MIE_VFPD(timing->lower_margin) |
 481                 MIE_VSPW(timing->vsync_len), ctx->regs_mie + MIE_PWMVIDTCON1);
 482
 483         writel(MIE_HBPD(timing->left_margin) |
 484                 MIE_HFPD(timing->right_margin) |
 485                 MIE_HSPW(timing->hsync_len), ctx->regs_mie + MIE_PWMVIDTCON2);
 486
 487         writel(MIE_DITHCON_EN | MIE_RGB6MODE,
 488                                         ctx->regs_mie + MIE_AUXCON);
 489
 490         /* Bypass MIE image brightness enhancement */
 491         for (i = 0; i <= 0x30; i += 4) {
 492                 writel(0, ctx->regs_mie + 0x100 + i);
 493                 writel(0, ctx->regs_mie + 0x200 + i);
 494         }
 495 }
 496
 497 static void fimd_win_commit(struct device *dev, int zpos)
 498 {
 499         struct fimd_context *ctx = get_fimd_context(dev);
 500         struct fimd_win_data *win_data;
 501         int win = zpos;
 502         unsigned long val, alpha, size;
 503
 504         DRM_DEBUG_KMS("%s\n", __FILE__);
 505
 506         if (ctx->suspended)
 507                 return;
 508
 509         if (win == DEFAULT_ZPOS)
 510                 win = ctx->default_win;
 511
 512         if (win < 0 || win > WINDOWS_NR)
 513                 return;
 514
 515         win_data = &ctx->win_data[win];
 516
 517         /*
 518          * SHADOWCON register is used for enabling timing.
 519          *
 520          * for example, once only width value of a register is set,
 521          * if the dma is started then fimd hardware could malfunction so
 522          * with protect window setting, the register fields with prefix '_F'
 523          * wouldn't be updated at vsync also but updated once unprotect window
 524          * is set.
 525          */
 526
 527         /* protect windows */
 528         val = readl(ctx->regs + SHADOWCON);
 529         val |= SHADOWCON_WINx_PROTECT(win);
 530         writel(val, ctx->regs + SHADOWCON);
 531
 532         /* buffer start address */
 533         val = (unsigned long)win_data->dma_addr;
 534         writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
 535
 536         /* buffer end address */
 537         size = win_data->fb_height * win_data->fb_pitch;
 538         val = (unsigned long)(win_data->dma_addr + size);
 539         writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
 540
 541         DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
 542                         (unsigned long)win_data->dma_addr, val, size);
 543         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 544                         win_data->ovl_width, win_data->ovl_height);
 545
 546         /* buffer size */
 547         val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) |
 548                 VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size);
 549         writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
 550
 551         /* OSD position */
 552         val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) |
 553                 VIDOSDxA_TOPLEFT_Y(win_data->offset_y);
 554         writel(val, ctx->regs + VIDOSD_A(win));
 555
 556         val = VIDOSDxB_BOTRIGHT_X(win_data->offset_x +
 557                                         win_data->ovl_width - 1) |
 558                 VIDOSDxB_BOTRIGHT_Y(win_data->offset_y +
 559                                         win_data->ovl_height - 1);
 560         writel(val, ctx->regs + VIDOSD_B(win));
 561
 562         DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
 563                         win_data->offset_x, win_data->offset_y,
 564                         win_data->offset_x + win_data->ovl_width - 1,
 565                         win_data->offset_y + win_data->ovl_height - 1);
 566
 567         /* hardware window 0 doesn't support alpha channel. */
 568         if (win != 0) {
 569                 /* OSD alpha */
 570                 alpha = VIDISD14C_ALPHA1_R(0xf) |
 571                         VIDISD14C_ALPHA1_G(0xf) |
 572                         VIDISD14C_ALPHA1_B(0xf);
 573
 574                 writel(alpha, ctx->regs + VIDOSD_C(win));
 575         }
 576
 577         /* OSD size */
 578         if (win != 3 && win != 4) {
 579                 u32 offset = VIDOSD_D(win);
 580                 if (win == 0)
 581                         offset = VIDOSD_C_SIZE_W0;
 582                 val = win_data->ovl_width * win_data->ovl_height;
 583                 writel(val, ctx->regs + offset);
 584
 585                 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
 586         }
 587
 588         fimd_win_set_pixfmt(dev, win);
 589
 590         /* hardware window 0 doesn't support color key. */
 591         if (win != 0)
 592                 fimd_win_set_colkey(dev, win);
 593
 594         /* wincon */
 595         val = readl(ctx->regs + WINCON(win));
 596         val |= WINCONx_ENWIN;
 597         writel(val, ctx->regs + WINCON(win));
 598
 599         mie_set_6bit_dithering(ctx);
 600
 601         /* Enable DMA channel and unprotect windows */
 602         val = readl(ctx->regs + SHADOWCON);
 603         val |= SHADOWCON_CHx_ENABLE(win);
 604         val &= ~SHADOWCON_WINx_PROTECT(win);
 605         writel(val, ctx->regs + SHADOWCON);
 606
 607         win_data->enabled = true;
 608 }
 609
 610 static void fimd_win_disable(struct device *dev, int zpos)
 611 {
 612         struct fimd_context *ctx = get_fimd_context(dev);
 613         struct fimd_win_data *win_data;
 614         int win = zpos;
 615         u32 val;
 616
 617         DRM_DEBUG_KMS("%s\n", __FILE__);
 618         if (ctx->suspended)
 619                 return;
 620
 621         if (win == DEFAULT_ZPOS)
 622                 win = ctx->default_win;
 623
 624         if (win < 0 || win > WINDOWS_NR)
 625                 return;
 626
 627         win_data = &ctx->win_data[win];
 628
 629         /* protect windows */
 630         val = readl(ctx->regs + SHADOWCON);
 631         val |= SHADOWCON_WINx_PROTECT(win);
 632         writel(val, ctx->regs + SHADOWCON);
 633
 634         /* wincon */
 635         val = readl(ctx->regs + WINCON(win));
 636         val &= ~WINCONx_ENWIN;
 637         writel(val, ctx->regs + WINCON(win));
 638
 639         /* unprotect windows */
 640         val = readl(ctx->regs + SHADOWCON);
 641         val &= ~SHADOWCON_CHx_ENABLE(win);
 642         val &= ~SHADOWCON_WINx_PROTECT(win);
 643         writel(val, ctx->regs + SHADOWCON);
 644
 645         win_data->enabled = false;
 646 }
 647
 648 static struct exynos_drm_overlay_ops fimd_overlay_ops = {
 649         .mode_set = fimd_win_mode_set,
 650         .commit = fimd_win_commit,
 651         .disable = fimd_win_disable,
 652 };
 653
 654 static struct exynos_drm_manager fimd_manager = {
 655         .pipe           = -1,
 656         .ops            = &fimd_manager_ops,
 657         .overlay_ops    = &fimd_overlay_ops,
 658         .display_ops    = &fimd_display_ops,
 659 };
 660
 661 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 662 {
 663         struct fimd_context *ctx = (struct fimd_context *)dev_id;
 664         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 665         struct drm_device *drm_dev = subdrv->drm_dev;
 666         struct exynos_drm_manager *manager = subdrv->manager;
 667         u32 val;
 668
 669         val = readl(ctx->regs + VIDINTCON1);
 670
 671         if (val & VIDINTCON1_INT_FRAME)
 672                 /* VSYNC interrupt */
 673                 writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
 674
 675         /* check the crtc is detached already from encoder */
 676         if (manager->pipe < 0)
 677                 goto out;
 678
 679         drm_handle_vblank(drm_dev, manager->pipe);
 680         exynos_drm_crtc_finish_pageflip(drm_dev, manager->pipe);
 681
 682 out:
 683         return IRQ_HANDLED;
 684 }
 685
 686 static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
 687 {
 688         DRM_DEBUG_KMS("%s\n", __FILE__);
 689
 690         /*
 691          * enable drm irq mode.
 692          * - with irq_enabled = 1, we can use the vblank feature.
 693          *
 694          * P.S. note that we wouldn't use drm irq handler but
 695          *      just specific driver own one instead because
 696          *      drm framework supports only one irq handler.
 697          */
 698         drm_dev->irq_enabled = 1;
 699
 700         /*
 701          * with vblank_disable_allowed = 1, vblank interrupt will be disabled
 702          * by drm timer once a current process gives up ownership of
 703          * vblank event.(after drm_vblank_put function is called)
 704          */
 705         drm_dev->vblank_disable_allowed = 1;
 706
 707         return 0;
 708 }
 709
 710 static void fimd_subdrv_remove(struct drm_device *drm_dev)
 711 {
 712         DRM_DEBUG_KMS("%s\n", __FILE__);
 713
 714         /* TODO. */
 715 }
 716
 717 static int fimd_calc_clkdiv(struct fimd_context *ctx,
 718                             struct fb_videomode *timing)
 719 {
 720         unsigned long clk = clk_get_rate(ctx->lcd_clk);
 721         u32 retrace;
 722         u32 clkdiv;
 723         u32 best_framerate = 0;
 724         u32 framerate;
 725
 726         DRM_DEBUG_KMS("%s\n", __FILE__);
 727
 728         retrace = timing->left_margin + timing->hsync_len +
 729                                 timing->right_margin + timing->xres;
 730         retrace *= timing->upper_margin + timing->vsync_len +
 731                                 timing->lower_margin + timing->yres;
 732
 733         /* default framerate is 60Hz */
 734         if (!timing->refresh)
 735                 timing->refresh = 60;
 736
 737         clk /= retrace;
 738
 739         for (clkdiv = 1; clkdiv < 0x100; clkdiv++) {
 740                 int tmp;
 741
 742                 /* get best framerate */
 743                 framerate = clk / clkdiv;
 744                 tmp = timing->refresh - framerate;
 745                 if (tmp < 0) {
 746                         best_framerate = framerate;
 747                         continue;
 748                 } else {
 749                         if (!best_framerate)
 750                                 best_framerate = framerate;
 751                         else if (tmp < (best_framerate - framerate))
 752                                 best_framerate = framerate;
 753                         break;
 754                 }
 755         }
 756
 757         return clkdiv;
 758 }
 759
 760 static void fimd_clear_win(struct fimd_context *ctx, int win)
 761 {
 762         u32 val;
 763
 764         DRM_DEBUG_KMS("%s\n", __FILE__);
 765
 766         writel(0, ctx->regs + WINCON(win));
 767         writel(0, ctx->regs + VIDOSD_A(win));
 768         writel(0, ctx->regs + VIDOSD_B(win));
 769         writel(0, ctx->regs + VIDOSD_C(win));
 770
 771         if (win == 1 || win == 2)
 772                 writel(0, ctx->regs + VIDOSD_D(win));
 773
 774         val = readl(ctx->regs + SHADOWCON);
 775         val &= ~SHADOWCON_WINx_PROTECT(win);
 776         writel(val, ctx->regs + SHADOWCON);
 777 }
 778
 779 static int fimd_power_on(struct fimd_context *ctx, bool enable)
 780 {
 781         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 782         struct device *dev = subdrv->dev;
 783         struct exynos_drm_fimd_pdata *pdata = dev->platform_data;
 784         int i;
 785
 786         DRM_DEBUG_KMS("%s\n", __FILE__);
 787
 788         if (enable) {
 789                 int ret;
 790
 791                 ret = clk_enable(ctx->bus_clk);
 792                 if (ret < 0)
 793                         return ret;
 794
 795                 ret = clk_enable(ctx->lcd_clk);
 796                 if  (ret < 0) {
 797                         clk_disable(ctx->bus_clk);
 798                         return ret;
 799                 }
 800
 801                 ctx->suspended = false;
 802
 803                 /* if vblank was enabled status, enable it again. */
 804                 if (test_and_clear_bit(0, &ctx->irq_flags))
 805                         fimd_enable_vblank(dev);
 806
 807                 fimd_apply(dev);
 808
 809                 if (pdata->panel_type == DP_LCD)
 810                         writel(MIE_CLK_ENABLE, ctx->regs + DPCLKCON);
 811         } else {
 812                 /*
 813                  * We need to make sure that all windows are disabled before we
 814                  * suspend that connector. Otherwise we might try to scan from
 815                  * a destroyed buffer later.
 816                  */
 817                 for (i = 0; i < WINDOWS_NR; i++)
 818                         fimd_win_disable(dev, i);
 819
 820                 clk_disable(ctx->lcd_clk);
 821                 clk_disable(ctx->bus_clk);
 822
 823                 ctx->suspended = true;
 824
 825                 if (pdata->panel_type == DP_LCD)
 826                         writel(0, ctx->regs + DPCLKCON);
 827         }
 828
 829         return 0;
 830 }
 831
 832 #ifdef CONFIG_EXYNOS_IOMMU
 833 static int iommu_init(struct platform_device *pdev)
 834 {
 835         struct platform_device *pds;
 836
 837         pds = find_sysmmu_dt(pdev, "sysmmu");
 838         if (pds==NULL) {
 839                 printk(KERN_ERR "No sysmmu found\n");
 840                 return -1;
 841         }
 842
 843         platform_set_sysmmu(&pds->dev, &pdev->dev);
 844         exynos_drm_common_mapping = s5p_create_iommu_mapping(&pdev->dev,
 845                                         0x20000000, SZ_256M, 4,
 846                                         exynos_drm_common_mapping);
 847
 848         if (!exynos_drm_common_mapping) {
 849                 printk(KERN_ERR "IOMMU mapping not created\n");
 850                 return -1;
 851         }
 852
 853         return 0;
 854 }
 855
 856 static void iommu_deinit(struct platform_device *pdev)
 857 {
 858         s5p_destroy_iommu_mapping(&pdev->dev);
 859         DRM_DEBUG("released the IOMMU mapping\n");
 860
 861         return;
 862 }
 863 #endif
 864
 865 static int __devinit fimd_probe(struct platform_device *pdev)
 866 {
 867         struct device *dev = &pdev->dev;
 868         struct fimd_context *ctx;
 869         struct exynos_drm_subdrv *subdrv;
 870         struct exynos_drm_fimd_pdata *pdata;
 871         struct exynos_drm_panel_info *panel;
 872         struct resource *res;
 873         struct clk *clk_parent;
 874         int win,i;
 875         int ret = -EINVAL;
 876
 877 #ifdef CONFIG_EXYNOS_IOMMU
 878         ret = iommu_init(pdev);
 879         if (ret < 0) {
 880                 dev_err(dev, "failed to initialize IOMMU\n");
 881                 return -ENODEV;
 882         }
 883 #endif
 884         DRM_DEBUG_KMS("%s\n", __FILE__);
 885
 886         pdata = pdev->dev.platform_data;
 887         if (!pdata) {
 888                 dev_err(dev, "no platform data specified\n");
 889                 return -EINVAL;
 890         }
 891
 892         panel = pdata->panel;
 893         if (!panel) {
 894                 dev_err(dev, "panel is null.\n");
 895                 return -EINVAL;
 896         }
 897
 898         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 899         if (!ctx)
 900                 return -ENOMEM;
 901
 902         ctx->bus_clk = clk_get(dev, "fimd");
 903         if (IS_ERR(ctx->bus_clk)) {
 904                 dev_err(dev, "failed to get bus clock\n");
 905                 ret = PTR_ERR(ctx->bus_clk);
 906                 goto err_clk_get;
 907         }
 908
 909         ctx->lcd_clk = clk_get(dev, "sclk_fimd");
 910         if (IS_ERR(ctx->lcd_clk)) {
 911                 dev_err(dev, "failed to get lcd clock\n");
 912                 ret = PTR_ERR(ctx->lcd_clk);
 913                 goto err_bus_clk;
 914         }
 915
 916         clk_parent = clk_get(NULL, "sclk_vpll");
 917         if (IS_ERR(clk_parent)) {
 918                 ret = PTR_ERR(clk_parent);
 919                 goto err_clk;
 920         }
 921
 922         if (clk_set_parent(ctx->lcd_clk, clk_parent)) {
 923                 ret = PTR_ERR(ctx->lcd_clk);
 924                 goto err_clk;
 925         }
 926
 927         if (clk_set_rate(ctx->lcd_clk, pdata->clock_rate)) {
 928                 ret = PTR_ERR(ctx->lcd_clk);
 929                 goto err_clk;
 930         }
 931
 932         clk_put(clk_parent);
 933
 934         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 935         if (!res) {
 936                 dev_err(dev, "failed to find registers\n");
 937                 ret = -ENOENT;
 938                 goto err_clk;
 939         }
 940
 941         ctx->regs_res = request_mem_region(res->start, resource_size(res),
 942                                            dev_name(dev));
 943         if (!ctx->regs_res) {
 944                 dev_err(dev, "failed to claim register region\n");
 945                 ret = -ENOENT;
 946                 goto err_clk;
 947         }
 948
 949         ctx->regs = ioremap(res->start, resource_size(res));
 950         if (!ctx->regs) {
 951                 dev_err(dev, "failed to map registers\n");
 952                 ret = -ENXIO;
 953                 goto err_req_region_io;
 954         }
 955
 956         ctx->regs_mie = ioremap(MIE_BASE_ADDRESS, 0x400);
 957         if (!ctx->regs_mie) {
 958                 dev_err(dev, "failed to map registers\n");
 959                 ret = -ENXIO;
 960                 goto err_req_region_io_mie;
 961         }
 962
 963         res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
 964         if (!res) {
 965                 dev_err(dev, "irq request failed.\n");
 966                 goto err_req_region_irq;
 967         }
 968
 969         ctx->irq = res->start;
 970
 971         ret = request_irq(ctx->irq, fimd_irq_handler, 0, "drm_fimd", ctx);
 972         if (ret < 0) {
 973                 dev_err(dev, "irq request failed.\n");
 974                 goto err_req_irq;
 975         }
 976
 977         ctx->vidcon0 = pdata->vidcon0;
 978         ctx->vidcon1 = pdata->vidcon1;
 979         ctx->default_win = pdata->default_win;
 980         ctx->panel = panel;
 981
 982         subdrv = &ctx->subdrv;
 983
 984         subdrv->dev = dev;
 985         subdrv->manager = &fimd_manager;
 986         subdrv->probe = fimd_subdrv_probe;
 987         subdrv->remove = fimd_subdrv_remove;
 988
 989         mutex_init(&ctx->lock);
 990
 991         platform_set_drvdata(pdev, ctx);
 992
 993         pm_runtime_enable(dev);
 994         pm_runtime_get_sync(dev);
 995
 996         for (i = 0;i < MAX_NR_PANELS;i++) {
 997                 if(panel[i].timing.xres == -1 && panel[i].timing.yres == -1)
 998                         break;
 999
1000                 ctx->clkdiv[i] = fimd_calc_clkdiv(ctx, &panel[i].timing);
1001                 panel[i].timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv[i];
1002                 DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n for panel[%d]",
1003                                 panel[i].timing.pixclock, ctx->clkdiv[i],i);
1004         }
1005
1006         for (win = 0; win < WINDOWS_NR; win++)
1007                 fimd_clear_win(ctx, win);
1008
1009         if (pdata->panel_type == DP_LCD)
1010                 writel(MIE_CLK_ENABLE, ctx->regs + DPCLKCON);
1011
1012         exynos_drm_subdrv_register(subdrv);
1013
1014         return 0;
1015
1016 err_req_irq:
1017 err_req_region_irq:
1018         iounmap(ctx->regs_mie);
1019
1020 err_req_region_io_mie:
1021         iounmap(ctx->regs);
1022
1023 err_req_region_io:
1024         release_resource(ctx->regs_res);
1025         kfree(ctx->regs_res);
1026
1027 err_clk:
1028         clk_disable(ctx->lcd_clk);
1029         clk_put(ctx->lcd_clk);
1030
1031 err_bus_clk:
1032         clk_disable(ctx->bus_clk);
1033         clk_put(ctx->bus_clk);
1034
1035 err_clk_get:
1036 #ifdef CONFIG_EXYNOS_IOMMU
1037         iommu_deinit(pdev);
1038 #endif
1039         kfree(ctx);
1040         return ret;
1041 }
1042
1043 static int __devexit fimd_remove(struct platform_device *pdev)
1044 {
1045         struct device *dev = &pdev->dev;
1046         struct fimd_context *ctx = platform_get_drvdata(pdev);
1047
1048         DRM_DEBUG_KMS("%s\n", __FILE__);
1049
1050         exynos_drm_subdrv_unregister(&ctx->subdrv);
1051
1052         if (ctx->suspended)
1053                 goto out;
1054
1055         clk_disable(ctx->lcd_clk);
1056         clk_disable(ctx->bus_clk);
1057
1058         pm_runtime_set_suspended(dev);
1059         pm_runtime_put_sync(dev);
1060
1061 out:
1062         pm_runtime_disable(dev);
1063
1064         clk_put(ctx->lcd_clk);
1065         clk_put(ctx->bus_clk);
1066
1067         iounmap(ctx->regs_mie);
1068         iounmap(ctx->regs);
1069         release_resource(ctx->regs_res);
1070         kfree(ctx->regs_res);
1071         free_irq(ctx->irq, ctx);
1072 #ifdef CONFIG_EXYNOS_IOMMU
1073         iommu_deinit(pdev);
1074 #endif
1075         kfree(ctx);
1076
1077         return 0;
1078 }
1079
1080 #ifdef CONFIG_PM_SLEEP
1081 static int fimd_suspend(struct device *dev)
1082 {
1083         struct fimd_context *ctx = get_fimd_context(dev);
1084
1085         if (pm_runtime_suspended(dev))
1086                 return 0;
1087
1088         /*
1089          * do not use pm_runtime_suspend(). if pm_runtime_suspend() is
1090          * called here, an error would be returned by that interface
1091          * because the usage_count of pm runtime is more than 1.
1092          */
1093         return fimd_power_on(ctx, false);
1094 }
1095
1096 static int fimd_resume(struct device *dev)
1097 {
1098         struct fimd_context *ctx = get_fimd_context(dev);
1099
1100         /*
1101          * if entered to sleep when lcd panel was on, the usage_count
1102          * of pm runtime would still be 1 so in this case, fimd driver
1103          * should be on directly not drawing on pm runtime interface.
1104          */
1105         if (!pm_runtime_suspended(dev))
1106                 return fimd_power_on(ctx, true);
1107
1108         return 0;
1109 }
1110 #endif
1111
1112 #ifdef CONFIG_PM_RUNTIME
1113 static int fimd_runtime_suspend(struct device *dev)
1114 {
1115         struct fimd_context *ctx = get_fimd_context(dev);
1116
1117         DRM_DEBUG_KMS("%s\n", __FILE__);
1118
1119         return fimd_power_on(ctx, false);
1120 }
1121
1122 static int fimd_runtime_resume(struct device *dev)
1123 {
1124         struct fimd_context *ctx = get_fimd_context(dev);
1125
1126         DRM_DEBUG_KMS("%s\n", __FILE__);
1127
1128         return fimd_power_on(ctx, true);
1129 }
1130 #endif
1131
1132 static struct platform_device_id exynos_drm_driver_ids[] = {
1133         {
1134                 .name           = "exynos4-fb",
1135         }, {
1136                 .name           = "exynos5-fb",
1137         },
1138         {},
1139 };
1140 MODULE_DEVICE_TABLE(platform, exynos_drm_driver_ids);
1141
1142 static const struct dev_pm_ops fimd_pm_ops = {
1143         SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume)
1144         SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL)
1145 };
1146
1147 struct platform_driver fimd_driver = {
1148         .probe          = fimd_probe,
1149         .remove         = __devexit_p(fimd_remove),
1150         .id_table       = exynos_drm_driver_ids,
1151         .driver         = {
1152                 .name   = "exynos-drm-fimd",
1153                 .owner  = THIS_MODULE,
1154                 .pm     = &fimd_pm_ops,
1155         },
1156 };