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 <drm/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/of_device.h>
  21 #include <linux/pm_runtime.h>
  22
  23 #include <video/samsung_fimd.h>
  24 #include <drm/exynos_drm.h>
  25
  26 #include "exynos_drm_drv.h"
  27 #include "exynos_drm_fbdev.h"
  28 #include "exynos_drm_crtc.h"
  29 #include "exynos_drm_iommu.h"
  30
  31 /*
  32  * FIMD is stand for Fully Interactive Mobile Display and
  33  * as a display controller, it transfers contents drawn on memory
  34  * to a LCD Panel through Display Interfaces such as RGB or
  35  * CPU Interface.
  36  */
  37
  38 /* position control register for hardware window 0, 2 ~ 4.*/
  39 #define VIDOSD_A(win)           (VIDOSD_BASE + 0x00 + (win) * 16)
  40 #define VIDOSD_B(win)           (VIDOSD_BASE + 0x04 + (win) * 16)
  41 /* size control register for hardware window 0. */
  42 #define VIDOSD_C_SIZE_W0        (VIDOSD_BASE + 0x08)
  43 /* alpha control register for hardware window 1 ~ 4. */
  44 #define VIDOSD_C(win)           (VIDOSD_BASE + 0x18 + (win) * 16)
  45 /* size control register for hardware window 1 ~ 4. */
  46 #define VIDOSD_D(win)           (VIDOSD_BASE + 0x0C + (win) * 16)
  47
  48 #define VIDWx_BUF_START(win, buf)       (VIDW_BUF_START(buf) + (win) * 8)
  49 #define VIDWx_BUF_END(win, buf)         (VIDW_BUF_END(buf) + (win) * 8)
  50 #define VIDWx_BUF_SIZE(win, buf)        (VIDW_BUF_SIZE(buf) + (win) * 4)
  51
  52 /* color key control register for hardware window 1 ~ 4. */
  53 #define WKEYCON0_BASE(x)                ((WKEYCON0 + 0x140) + (x * 8))
  54 /* color key value register for hardware window 1 ~ 4. */
  55 #define WKEYCON1_BASE(x)                ((WKEYCON1 + 0x140) + (x * 8))
  56
  57 /* FIMD has totally five hardware windows. */
  58 #define WINDOWS_NR      5
  59
  60 #define get_fimd_context(dev)   platform_get_drvdata(to_platform_device(dev))
  61
  62 struct fimd_driver_data {
  63         unsigned int timing_base;
  64 };
  65
  66 static struct fimd_driver_data exynos4_fimd_driver_data = {
  67         .timing_base = 0x0,
  68 };
  69
  70 static struct fimd_driver_data exynos5_fimd_driver_data = {
  71         .timing_base = 0x20000,
  72 };
  73
  74 struct fimd_win_data {
  75         unsigned int            offset_x;
  76         unsigned int            offset_y;
  77         unsigned int            ovl_width;
  78         unsigned int            ovl_height;
  79         unsigned int            fb_width;
  80         unsigned int            fb_height;
  81         unsigned int            bpp;
  82         dma_addr_t              dma_addr;
  83         unsigned int            buf_offsize;
  84         unsigned int            line_size;      /* bytes */
  85         bool                    enabled;
  86         bool                    resume;
  87 };
  88
  89 struct fimd_context {
  90         struct exynos_drm_subdrv        subdrv;
  91         int                             irq;
  92         struct drm_crtc                 *crtc;
  93         struct clk                      *bus_clk;
  94         struct clk                      *lcd_clk;
  95         void __iomem                    *regs;
  96         struct fimd_win_data            win_data[WINDOWS_NR];
  97         unsigned int                    clkdiv;
  98         unsigned int                    default_win;
  99         unsigned long                   irq_flags;
 100         u32                             vidcon0;
 101         u32                             vidcon1;
 102         bool                            suspended;
 103         struct mutex                    lock;
 104         wait_queue_head_t               wait_vsync_queue;
 105         atomic_t                        wait_vsync_event;
 106
 107         struct exynos_drm_panel_info *panel;
 108 };
 109
 110 #ifdef CONFIG_OF
 111 static const struct of_device_id fimd_driver_dt_match[] = {
 112         { .compatible = "samsung,exynos4-fimd",
 113           .data = &exynos4_fimd_driver_data },
 114         { .compatible = "samsung,exynos5-fimd",
 115           .data = &exynos5_fimd_driver_data },
 116         {},
 117 };
 118 MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
 119 #endif
 120
 121 static inline struct fimd_driver_data *drm_fimd_get_driver_data(
 122         struct platform_device *pdev)
 123 {
 124 #ifdef CONFIG_OF
 125         const struct of_device_id *of_id =
 126                         of_match_device(fimd_driver_dt_match, &pdev->dev);
 127
 128         if (of_id)
 129                 return (struct fimd_driver_data *)of_id->data;
 130 #endif
 131
 132         return (struct fimd_driver_data *)
 133                 platform_get_device_id(pdev)->driver_data;
 134 }
 135
 136 static bool fimd_display_is_connected(struct device *dev)
 137 {
 138         DRM_DEBUG_KMS("%s\n", __FILE__);
 139
 140         /* TODO. */
 141
 142         return true;
 143 }
 144
 145 static void *fimd_get_panel(struct device *dev)
 146 {
 147         struct fimd_context *ctx = get_fimd_context(dev);
 148
 149         DRM_DEBUG_KMS("%s\n", __FILE__);
 150
 151         return ctx->panel;
 152 }
 153
 154 static int fimd_check_timing(struct device *dev, void *timing)
 155 {
 156         DRM_DEBUG_KMS("%s\n", __FILE__);
 157
 158         /* TODO. */
 159
 160         return 0;
 161 }
 162
 163 static int fimd_display_power_on(struct device *dev, int mode)
 164 {
 165         DRM_DEBUG_KMS("%s\n", __FILE__);
 166
 167         /* TODO */
 168
 169         return 0;
 170 }
 171
 172 static struct exynos_drm_display_ops fimd_display_ops = {
 173         .type = EXYNOS_DISPLAY_TYPE_LCD,
 174         .is_connected = fimd_display_is_connected,
 175         .get_panel = fimd_get_panel,
 176         .check_timing = fimd_check_timing,
 177         .power_on = fimd_display_power_on,
 178 };
 179
 180 static void fimd_dpms(struct device *subdrv_dev, int mode)
 181 {
 182         struct fimd_context *ctx = get_fimd_context(subdrv_dev);
 183
 184         DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
 185
 186         mutex_lock(&ctx->lock);
 187
 188         switch (mode) {
 189         case DRM_MODE_DPMS_ON:
 190                 /*
 191                  * enable fimd hardware only if suspended status.
 192                  *
 193                  * P.S. fimd_dpms function would be called at booting time so
 194                  * clk_enable could be called double time.
 195                  */
 196                 if (ctx->suspended)
 197                         pm_runtime_get_sync(subdrv_dev);
 198                 break;
 199         case DRM_MODE_DPMS_STANDBY:
 200         case DRM_MODE_DPMS_SUSPEND:
 201         case DRM_MODE_DPMS_OFF:
 202                 if (!ctx->suspended)
 203                         pm_runtime_put_sync(subdrv_dev);
 204                 break;
 205         default:
 206                 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
 207                 break;
 208         }
 209
 210         mutex_unlock(&ctx->lock);
 211 }
 212
 213 static void fimd_apply(struct device *subdrv_dev)
 214 {
 215         struct fimd_context *ctx = get_fimd_context(subdrv_dev);
 216         struct exynos_drm_manager *mgr = ctx->subdrv.manager;
 217         struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
 218         struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
 219         struct fimd_win_data *win_data;
 220         int i;
 221
 222         DRM_DEBUG_KMS("%s\n", __FILE__);
 223
 224         for (i = 0; i < WINDOWS_NR; i++) {
 225                 win_data = &ctx->win_data[i];
 226                 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
 227                         ovl_ops->commit(subdrv_dev, i);
 228         }
 229
 230         if (mgr_ops && mgr_ops->commit)
 231                 mgr_ops->commit(subdrv_dev);
 232 }
 233
 234 static void fimd_commit(struct device *dev)
 235 {
 236         struct fimd_context *ctx = get_fimd_context(dev);
 237         struct exynos_drm_panel_info *panel = ctx->panel;
 238         struct fb_videomode *timing = &panel->timing;
 239         struct fimd_driver_data *driver_data;
 240         struct platform_device *pdev = to_platform_device(dev);
 241         u32 val;
 242
 243         driver_data = drm_fimd_get_driver_data(pdev);
 244         if (ctx->suspended)
 245                 return;
 246
 247         DRM_DEBUG_KMS("%s\n", __FILE__);
 248
 249         /* setup polarity values from machine code. */
 250         writel(ctx->vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
 251
 252         /* setup vertical timing values. */
 253         val = VIDTCON0_VBPD(timing->upper_margin - 1) |
 254                VIDTCON0_VFPD(timing->lower_margin - 1) |
 255                VIDTCON0_VSPW(timing->vsync_len - 1);
 256         writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
 257
 258         /* setup horizontal timing values.  */
 259         val = VIDTCON1_HBPD(timing->left_margin - 1) |
 260                VIDTCON1_HFPD(timing->right_margin - 1) |
 261                VIDTCON1_HSPW(timing->hsync_len - 1);
 262         writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
 263
 264         /* setup horizontal and vertical display size. */
 265         val = VIDTCON2_LINEVAL(timing->yres - 1) |
 266                VIDTCON2_HOZVAL(timing->xres - 1) |
 267                VIDTCON2_LINEVAL_E(timing->yres - 1) |
 268                VIDTCON2_HOZVAL_E(timing->xres - 1);
 269         writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
 270
 271         /* setup clock source, clock divider, enable dma. */
 272         val = ctx->vidcon0;
 273         val &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR);
 274
 275         if (ctx->clkdiv > 1)
 276                 val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR;
 277         else
 278                 val &= ~VIDCON0_CLKDIR; /* 1:1 clock */
 279
 280         /*
 281          * fields of register with prefix '_F' would be updated
 282          * at vsync(same as dma start)
 283          */
 284         val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
 285         writel(val, ctx->regs + VIDCON0);
 286 }
 287
 288 static int fimd_enable_vblank(struct device *dev)
 289 {
 290         struct fimd_context *ctx = get_fimd_context(dev);
 291         u32 val;
 292
 293         DRM_DEBUG_KMS("%s\n", __FILE__);
 294
 295         if (ctx->suspended)
 296                 return -EPERM;
 297
 298         if (!test_and_set_bit(0, &ctx->irq_flags)) {
 299                 val = readl(ctx->regs + VIDINTCON0);
 300
 301                 val |= VIDINTCON0_INT_ENABLE;
 302                 val |= VIDINTCON0_INT_FRAME;
 303
 304                 val &= ~VIDINTCON0_FRAMESEL0_MASK;
 305                 val |= VIDINTCON0_FRAMESEL0_VSYNC;
 306                 val &= ~VIDINTCON0_FRAMESEL1_MASK;
 307                 val |= VIDINTCON0_FRAMESEL1_NONE;
 308
 309                 writel(val, ctx->regs + VIDINTCON0);
 310         }
 311
 312         return 0;
 313 }
 314
 315 static void fimd_disable_vblank(struct device *dev)
 316 {
 317         struct fimd_context *ctx = get_fimd_context(dev);
 318         u32 val;
 319
 320         DRM_DEBUG_KMS("%s\n", __FILE__);
 321
 322         if (ctx->suspended)
 323                 return;
 324
 325         if (test_and_clear_bit(0, &ctx->irq_flags)) {
 326                 val = readl(ctx->regs + VIDINTCON0);
 327
 328                 val &= ~VIDINTCON0_INT_FRAME;
 329                 val &= ~VIDINTCON0_INT_ENABLE;
 330
 331                 writel(val, ctx->regs + VIDINTCON0);
 332         }
 333 }
 334
 335 static void fimd_wait_for_vblank(struct device *dev)
 336 {
 337         struct fimd_context *ctx = get_fimd_context(dev);
 338
 339         if (ctx->suspended)
 340                 return;
 341
 342         atomic_set(&ctx->wait_vsync_event, 1);
 343
 344         /*
 345          * wait for FIMD to signal VSYNC interrupt or return after
 346          * timeout which is set to 50ms (refresh rate of 20).
 347          */
 348         if (!wait_event_timeout(ctx->wait_vsync_queue,
 349                                 !atomic_read(&ctx->wait_vsync_event),
 350                                 DRM_HZ/20))
 351                 DRM_DEBUG_KMS("vblank wait timed out.\n");
 352 }
 353
 354 static struct exynos_drm_manager_ops fimd_manager_ops = {
 355         .dpms = fimd_dpms,
 356         .apply = fimd_apply,
 357         .commit = fimd_commit,
 358         .enable_vblank = fimd_enable_vblank,
 359         .disable_vblank = fimd_disable_vblank,
 360         .wait_for_vblank = fimd_wait_for_vblank,
 361 };
 362
 363 static void fimd_win_mode_set(struct device *dev,
 364                               struct exynos_drm_overlay *overlay)
 365 {
 366         struct fimd_context *ctx = get_fimd_context(dev);
 367         struct fimd_win_data *win_data;
 368         int win;
 369         unsigned long offset;
 370
 371         DRM_DEBUG_KMS("%s\n", __FILE__);
 372
 373         if (!overlay) {
 374                 dev_err(dev, "overlay is NULL\n");
 375                 return;
 376         }
 377
 378         win = overlay->zpos;
 379         if (win == DEFAULT_ZPOS)
 380                 win = ctx->default_win;
 381
 382         if (win < 0 || win > WINDOWS_NR)
 383                 return;
 384
 385         offset = overlay->fb_x * (overlay->bpp >> 3);
 386         offset += overlay->fb_y * overlay->pitch;
 387
 388         DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
 389
 390         win_data = &ctx->win_data[win];
 391
 392         win_data->offset_x = overlay->crtc_x;
 393         win_data->offset_y = overlay->crtc_y;
 394         win_data->ovl_width = overlay->crtc_width;
 395         win_data->ovl_height = overlay->crtc_height;
 396         win_data->fb_width = overlay->fb_width;
 397         win_data->fb_height = overlay->fb_height;
 398         win_data->dma_addr = overlay->dma_addr[0] + offset;
 399         win_data->bpp = overlay->bpp;
 400         win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
 401                                 (overlay->bpp >> 3);
 402         win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
 403
 404         DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
 405                         win_data->offset_x, win_data->offset_y);
 406         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 407                         win_data->ovl_width, win_data->ovl_height);
 408         DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
 409         DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
 410                         overlay->fb_width, overlay->crtc_width);
 411 }
 412
 413 static void fimd_win_set_pixfmt(struct device *dev, unsigned int win)
 414 {
 415         struct fimd_context *ctx = get_fimd_context(dev);
 416         struct fimd_win_data *win_data = &ctx->win_data[win];
 417         unsigned long val;
 418
 419         DRM_DEBUG_KMS("%s\n", __FILE__);
 420
 421         val = WINCONx_ENWIN;
 422
 423         switch (win_data->bpp) {
 424         case 1:
 425                 val |= WINCON0_BPPMODE_1BPP;
 426                 val |= WINCONx_BITSWP;
 427                 val |= WINCONx_BURSTLEN_4WORD;
 428                 break;
 429         case 2:
 430                 val |= WINCON0_BPPMODE_2BPP;
 431                 val |= WINCONx_BITSWP;
 432                 val |= WINCONx_BURSTLEN_8WORD;
 433                 break;
 434         case 4:
 435                 val |= WINCON0_BPPMODE_4BPP;
 436                 val |= WINCONx_BITSWP;
 437                 val |= WINCONx_BURSTLEN_8WORD;
 438                 break;
 439         case 8:
 440                 val |= WINCON0_BPPMODE_8BPP_PALETTE;
 441                 val |= WINCONx_BURSTLEN_8WORD;
 442                 val |= WINCONx_BYTSWP;
 443                 break;
 444         case 16:
 445                 val |= WINCON0_BPPMODE_16BPP_565;
 446                 val |= WINCONx_HAWSWP;
 447                 val |= WINCONx_BURSTLEN_16WORD;
 448                 break;
 449         case 24:
 450                 val |= WINCON0_BPPMODE_24BPP_888;
 451                 val |= WINCONx_WSWP;
 452                 val |= WINCONx_BURSTLEN_16WORD;
 453                 break;
 454         case 32:
 455                 val |= WINCON1_BPPMODE_28BPP_A4888
 456                         | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
 457                 val |= WINCONx_WSWP;
 458                 val |= WINCONx_BURSTLEN_16WORD;
 459                 break;
 460         default:
 461                 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
 462
 463                 val |= WINCON0_BPPMODE_24BPP_888;
 464                 val |= WINCONx_WSWP;
 465                 val |= WINCONx_BURSTLEN_16WORD;
 466                 break;
 467         }
 468
 469         DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp);
 470
 471         writel(val, ctx->regs + WINCON(win));
 472 }
 473
 474 static void fimd_win_set_colkey(struct device *dev, unsigned int win)
 475 {
 476         struct fimd_context *ctx = get_fimd_context(dev);
 477         unsigned int keycon0 = 0, keycon1 = 0;
 478
 479         DRM_DEBUG_KMS("%s\n", __FILE__);
 480
 481         keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
 482                         WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
 483
 484         keycon1 = WxKEYCON1_COLVAL(0xffffffff);
 485
 486         writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
 487         writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
 488 }
 489
 490 static void fimd_win_commit(struct device *dev, int zpos)
 491 {
 492         struct fimd_context *ctx = get_fimd_context(dev);
 493         struct fimd_win_data *win_data;
 494         int win = zpos;
 495         unsigned long val, alpha, size;
 496         unsigned int last_x;
 497         unsigned int last_y;
 498
 499         DRM_DEBUG_KMS("%s\n", __FILE__);
 500
 501         if (ctx->suspended)
 502                 return;
 503
 504         if (win == DEFAULT_ZPOS)
 505                 win = ctx->default_win;
 506
 507         if (win < 0 || win > WINDOWS_NR)
 508                 return;
 509
 510         win_data = &ctx->win_data[win];
 511
 512         /*
 513          * SHADOWCON register is used for enabling timing.
 514          *
 515          * for example, once only width value of a register is set,
 516          * if the dma is started then fimd hardware could malfunction so
 517          * with protect window setting, the register fields with prefix '_F'
 518          * wouldn't be updated at vsync also but updated once unprotect window
 519          * is set.
 520          */
 521
 522         /* protect windows */
 523         val = readl(ctx->regs + SHADOWCON);
 524         val |= SHADOWCON_WINx_PROTECT(win);
 525         writel(val, ctx->regs + SHADOWCON);
 526
 527         /* buffer start address */
 528         val = (unsigned long)win_data->dma_addr;
 529         writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
 530
 531         /* buffer end address */
 532         size = win_data->fb_width * win_data->ovl_height * (win_data->bpp >> 3);
 533         val = (unsigned long)(win_data->dma_addr + size);
 534         writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
 535
 536         DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
 537                         (unsigned long)win_data->dma_addr, val, size);
 538         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 539                         win_data->ovl_width, win_data->ovl_height);
 540
 541         /* buffer size */
 542         val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) |
 543                 VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size) |
 544                 VIDW_BUF_SIZE_OFFSET_E(win_data->buf_offsize) |
 545                 VIDW_BUF_SIZE_PAGEWIDTH_E(win_data->line_size);
 546         writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
 547
 548         /* OSD position */
 549         val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) |
 550                 VIDOSDxA_TOPLEFT_Y(win_data->offset_y) |
 551                 VIDOSDxA_TOPLEFT_X_E(win_data->offset_x) |
 552                 VIDOSDxA_TOPLEFT_Y_E(win_data->offset_y);
 553         writel(val, ctx->regs + VIDOSD_A(win));
 554
 555         last_x = win_data->offset_x + win_data->ovl_width;
 556         if (last_x)
 557                 last_x--;
 558         last_y = win_data->offset_y + win_data->ovl_height;
 559         if (last_y)
 560                 last_y--;
 561
 562         val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
 563                 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
 564
 565         writel(val, ctx->regs + VIDOSD_B(win));
 566
 567         DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
 568                         win_data->offset_x, win_data->offset_y, last_x, last_y);
 569
 570         /* hardware window 0 doesn't support alpha channel. */
 571         if (win != 0) {
 572                 /* OSD alpha */
 573                 alpha = VIDISD14C_ALPHA1_R(0xf) |
 574                         VIDISD14C_ALPHA1_G(0xf) |
 575                         VIDISD14C_ALPHA1_B(0xf);
 576
 577                 writel(alpha, ctx->regs + VIDOSD_C(win));
 578         }
 579
 580         /* OSD size */
 581         if (win != 3 && win != 4) {
 582                 u32 offset = VIDOSD_D(win);
 583                 if (win == 0)
 584                         offset = VIDOSD_C_SIZE_W0;
 585                 val = win_data->ovl_width * win_data->ovl_height;
 586                 writel(val, ctx->regs + offset);
 587
 588                 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
 589         }
 590
 591         fimd_win_set_pixfmt(dev, win);
 592
 593         /* hardware window 0 doesn't support color key. */
 594         if (win != 0)
 595                 fimd_win_set_colkey(dev, win);
 596
 597         /* wincon */
 598         val = readl(ctx->regs + WINCON(win));
 599         val |= WINCONx_ENWIN;
 600         writel(val, ctx->regs + WINCON(win));
 601
 602         /* Enable DMA channel and unprotect windows */
 603         val = readl(ctx->regs + SHADOWCON);
 604         val |= SHADOWCON_CHx_ENABLE(win);
 605         val &= ~SHADOWCON_WINx_PROTECT(win);
 606         writel(val, ctx->regs + SHADOWCON);
 607
 608         win_data->enabled = true;
 609 }
 610
 611 static void fimd_win_disable(struct device *dev, int zpos)
 612 {
 613         struct fimd_context *ctx = get_fimd_context(dev);
 614         struct fimd_win_data *win_data;
 615         int win = zpos;
 616         u32 val;
 617
 618         DRM_DEBUG_KMS("%s\n", __FILE__);
 619
 620         if (win == DEFAULT_ZPOS)
 621                 win = ctx->default_win;
 622
 623         if (win < 0 || win > WINDOWS_NR)
 624                 return;
 625
 626         win_data = &ctx->win_data[win];
 627
 628         if (ctx->suspended) {
 629                 /* do not resume this window*/
 630                 win_data->resume = false;
 631                 return;
 632         }
 633
 634         /* protect windows */
 635         val = readl(ctx->regs + SHADOWCON);
 636         val |= SHADOWCON_WINx_PROTECT(win);
 637         writel(val, ctx->regs + SHADOWCON);
 638
 639         /* wincon */
 640         val = readl(ctx->regs + WINCON(win));
 641         val &= ~WINCONx_ENWIN;
 642         writel(val, ctx->regs + WINCON(win));
 643
 644         /* unprotect windows */
 645         val = readl(ctx->regs + SHADOWCON);
 646         val &= ~SHADOWCON_CHx_ENABLE(win);
 647         val &= ~SHADOWCON_WINx_PROTECT(win);
 648         writel(val, ctx->regs + SHADOWCON);
 649
 650         win_data->enabled = false;
 651 }
 652
 653 static struct exynos_drm_overlay_ops fimd_overlay_ops = {
 654         .mode_set = fimd_win_mode_set,
 655         .commit = fimd_win_commit,
 656         .disable = fimd_win_disable,
 657 };
 658
 659 static struct exynos_drm_manager fimd_manager = {
 660         .pipe           = -1,
 661         .ops            = &fimd_manager_ops,
 662         .overlay_ops    = &fimd_overlay_ops,
 663         .display_ops    = &fimd_display_ops,
 664 };
 665
 666 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 667 {
 668         struct fimd_context *ctx = (struct fimd_context *)dev_id;
 669         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 670         struct drm_device *drm_dev = subdrv->drm_dev;
 671         struct exynos_drm_manager *manager = subdrv->manager;
 672         u32 val;
 673
 674         val = readl(ctx->regs + VIDINTCON1);
 675
 676         if (val & VIDINTCON1_INT_FRAME)
 677                 /* VSYNC interrupt */
 678                 writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
 679
 680         /* check the crtc is detached already from encoder */
 681         if (manager->pipe < 0)
 682                 goto out;
 683
 684         drm_handle_vblank(drm_dev, manager->pipe);
 685         exynos_drm_crtc_finish_pageflip(drm_dev, manager->pipe);
 686
 687         /* set wait vsync event to zero and wake up queue. */
 688         if (atomic_read(&ctx->wait_vsync_event)) {
 689                 atomic_set(&ctx->wait_vsync_event, 0);
 690                 DRM_WAKEUP(&ctx->wait_vsync_queue);
 691         }
 692 out:
 693         return IRQ_HANDLED;
 694 }
 695
 696 static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
 697 {
 698         DRM_DEBUG_KMS("%s\n", __FILE__);
 699
 700         /*
 701          * enable drm irq mode.
 702          * - with irq_enabled = 1, we can use the vblank feature.
 703          *
 704          * P.S. note that we wouldn't use drm irq handler but
 705          *      just specific driver own one instead because
 706          *      drm framework supports only one irq handler.
 707          */
 708         drm_dev->irq_enabled = 1;
 709
 710         /*
 711          * with vblank_disable_allowed = 1, vblank interrupt will be disabled
 712          * by drm timer once a current process gives up ownership of
 713          * vblank event.(after drm_vblank_put function is called)
 714          */
 715         drm_dev->vblank_disable_allowed = 1;
 716
 717         /* attach this sub driver to iommu mapping if supported. */
 718         if (is_drm_iommu_supported(drm_dev))
 719                 drm_iommu_attach_device(drm_dev, dev);
 720
 721         return 0;
 722 }
 723
 724 static void fimd_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
 725 {
 726         DRM_DEBUG_KMS("%s\n", __FILE__);
 727
 728         /* detach this sub driver from iommu mapping if supported. */
 729         if (is_drm_iommu_supported(drm_dev))
 730                 drm_iommu_detach_device(drm_dev, dev);
 731 }
 732
 733 static int fimd_calc_clkdiv(struct fimd_context *ctx,
 734                             struct fb_videomode *timing)
 735 {
 736         unsigned long clk = clk_get_rate(ctx->lcd_clk);
 737         u32 retrace;
 738         u32 clkdiv;
 739         u32 best_framerate = 0;
 740         u32 framerate;
 741
 742         DRM_DEBUG_KMS("%s\n", __FILE__);
 743
 744         retrace = timing->left_margin + timing->hsync_len +
 745                                 timing->right_margin + timing->xres;
 746         retrace *= timing->upper_margin + timing->vsync_len +
 747                                 timing->lower_margin + timing->yres;
 748
 749         /* default framerate is 60Hz */
 750         if (!timing->refresh)
 751                 timing->refresh = 60;
 752
 753         clk /= retrace;
 754
 755         for (clkdiv = 1; clkdiv < 0x100; clkdiv++) {
 756                 int tmp;
 757
 758                 /* get best framerate */
 759                 framerate = clk / clkdiv;
 760                 tmp = timing->refresh - framerate;
 761                 if (tmp < 0) {
 762                         best_framerate = framerate;
 763                         continue;
 764                 } else {
 765                         if (!best_framerate)
 766                                 best_framerate = framerate;
 767                         else if (tmp < (best_framerate - framerate))
 768                                 best_framerate = framerate;
 769                         break;
 770                 }
 771         }
 772
 773         return clkdiv;
 774 }
 775
 776 static void fimd_clear_win(struct fimd_context *ctx, int win)
 777 {
 778         u32 val;
 779
 780         DRM_DEBUG_KMS("%s\n", __FILE__);
 781
 782         writel(0, ctx->regs + WINCON(win));
 783         writel(0, ctx->regs + VIDOSD_A(win));
 784         writel(0, ctx->regs + VIDOSD_B(win));
 785         writel(0, ctx->regs + VIDOSD_C(win));
 786
 787         if (win == 1 || win == 2)
 788                 writel(0, ctx->regs + VIDOSD_D(win));
 789
 790         val = readl(ctx->regs + SHADOWCON);
 791         val &= ~SHADOWCON_WINx_PROTECT(win);
 792         writel(val, ctx->regs + SHADOWCON);
 793 }
 794
 795 static int fimd_clock(struct fimd_context *ctx, bool enable)
 796 {
 797         DRM_DEBUG_KMS("%s\n", __FILE__);
 798
 799         if (enable) {
 800                 int ret;
 801
 802                 ret = clk_enable(ctx->bus_clk);
 803                 if (ret < 0)
 804                         return ret;
 805
 806                 ret = clk_enable(ctx->lcd_clk);
 807                 if  (ret < 0) {
 808                         clk_disable(ctx->bus_clk);
 809                         return ret;
 810                 }
 811         } else {
 812                 clk_disable(ctx->lcd_clk);
 813                 clk_disable(ctx->bus_clk);
 814         }
 815
 816         return 0;
 817 }
 818
 819 static void fimd_window_suspend(struct device *dev)
 820 {
 821         struct fimd_context *ctx = get_fimd_context(dev);
 822         struct fimd_win_data *win_data;
 823         int i;
 824
 825         for (i = 0; i < WINDOWS_NR; i++) {
 826                 win_data = &ctx->win_data[i];
 827                 win_data->resume = win_data->enabled;
 828                 fimd_win_disable(dev, i);
 829         }
 830         fimd_wait_for_vblank(dev);
 831 }
 832
 833 static void fimd_window_resume(struct device *dev)
 834 {
 835         struct fimd_context *ctx = get_fimd_context(dev);
 836         struct fimd_win_data *win_data;
 837         int i;
 838
 839         for (i = 0; i < WINDOWS_NR; i++) {
 840                 win_data = &ctx->win_data[i];
 841                 win_data->enabled = win_data->resume;
 842                 win_data->resume = false;
 843         }
 844 }
 845
 846 static int fimd_activate(struct fimd_context *ctx, bool enable)
 847 {
 848         struct device *dev = ctx->subdrv.dev;
 849         if (enable) {
 850                 int ret;
 851
 852                 ret = fimd_clock(ctx, true);
 853                 if (ret < 0)
 854                         return ret;
 855
 856                 ctx->suspended = false;
 857
 858                 /* if vblank was enabled status, enable it again. */
 859                 if (test_and_clear_bit(0, &ctx->irq_flags))
 860                         fimd_enable_vblank(dev);
 861
 862                 fimd_window_resume(dev);
 863         } else {
 864                 fimd_window_suspend(dev);
 865
 866                 fimd_clock(ctx, false);
 867                 ctx->suspended = true;
 868         }
 869
 870         return 0;
 871 }
 872
 873 static int fimd_probe(struct platform_device *pdev)
 874 {
 875         struct device *dev = &pdev->dev;
 876         struct fimd_context *ctx;
 877         struct exynos_drm_subdrv *subdrv;
 878         struct exynos_drm_fimd_pdata *pdata;
 879         struct exynos_drm_panel_info *panel;
 880         struct resource *res;
 881         int win;
 882         int ret = -EINVAL;
 883
 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 = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
 899         if (!ctx)
 900                 return -ENOMEM;
 901
 902         ctx->bus_clk = devm_clk_get(dev, "fimd");
 903         if (IS_ERR(ctx->bus_clk)) {
 904                 dev_err(dev, "failed to get bus clock\n");
 905                 return PTR_ERR(ctx->bus_clk);
 906         }
 907
 908         ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
 909         if (IS_ERR(ctx->lcd_clk)) {
 910                 dev_err(dev, "failed to get lcd clock\n");
 911                 return PTR_ERR(ctx->lcd_clk);
 912         }
 913
 914         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 915
 916         ctx->regs = devm_ioremap_resource(&pdev->dev, res);
 917         if (IS_ERR(ctx->regs))
 918                 return PTR_ERR(ctx->regs);
 919
 920         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 921         if (!res) {
 922                 dev_err(dev, "irq request failed.\n");
 923                 return -ENXIO;
 924         }
 925
 926         ctx->irq = res->start;
 927
 928         ret = devm_request_irq(&pdev->dev, ctx->irq, fimd_irq_handler,
 929                                                         0, "drm_fimd", ctx);
 930         if (ret) {
 931                 dev_err(dev, "irq request failed.\n");
 932                 return ret;
 933         }
 934
 935         ctx->vidcon0 = pdata->vidcon0;
 936         ctx->vidcon1 = pdata->vidcon1;
 937         ctx->default_win = pdata->default_win;
 938         ctx->panel = panel;
 939         DRM_INIT_WAITQUEUE(&ctx->wait_vsync_queue);
 940         atomic_set(&ctx->wait_vsync_event, 0);
 941
 942         subdrv = &ctx->subdrv;
 943
 944         subdrv->dev = dev;
 945         subdrv->manager = &fimd_manager;
 946         subdrv->probe = fimd_subdrv_probe;
 947         subdrv->remove = fimd_subdrv_remove;
 948
 949         mutex_init(&ctx->lock);
 950
 951         platform_set_drvdata(pdev, ctx);
 952
 953         pm_runtime_enable(dev);
 954         pm_runtime_get_sync(dev);
 955
 956         ctx->clkdiv = fimd_calc_clkdiv(ctx, &panel->timing);
 957         panel->timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv;
 958
 959         DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n",
 960                         panel->timing.pixclock, ctx->clkdiv);
 961
 962         for (win = 0; win < WINDOWS_NR; win++)
 963                 fimd_clear_win(ctx, win);
 964
 965         exynos_drm_subdrv_register(subdrv);
 966
 967         return 0;
 968 }
 969
 970 static int fimd_remove(struct platform_device *pdev)
 971 {
 972         struct device *dev = &pdev->dev;
 973         struct fimd_context *ctx = platform_get_drvdata(pdev);
 974
 975         DRM_DEBUG_KMS("%s\n", __FILE__);
 976
 977         exynos_drm_subdrv_unregister(&ctx->subdrv);
 978
 979         if (ctx->suspended)
 980                 goto out;
 981
 982         clk_disable(ctx->lcd_clk);
 983         clk_disable(ctx->bus_clk);
 984
 985         pm_runtime_set_suspended(dev);
 986         pm_runtime_put_sync(dev);
 987
 988 out:
 989         pm_runtime_disable(dev);
 990
 991         return 0;
 992 }
 993
 994 #ifdef CONFIG_PM_SLEEP
 995 static int fimd_suspend(struct device *dev)
 996 {
 997         struct fimd_context *ctx = get_fimd_context(dev);
 998
 999         /*
1000          * do not use pm_runtime_suspend(). if pm_runtime_suspend() is
1001          * called here, an error would be returned by that interface
1002          * because the usage_count of pm runtime is more than 1.
1003          */
1004         if (!pm_runtime_suspended(dev))
1005                 return fimd_activate(ctx, false);
1006
1007         return 0;
1008 }
1009
1010 static int fimd_resume(struct device *dev)
1011 {
1012         struct fimd_context *ctx = get_fimd_context(dev);
1013
1014         /*
1015          * if entered to sleep when lcd panel was on, the usage_count
1016          * of pm runtime would still be 1 so in this case, fimd driver
1017          * should be on directly not drawing on pm runtime interface.
1018          */
1019         if (!pm_runtime_suspended(dev)) {
1020                 int ret;
1021
1022                 ret = fimd_activate(ctx, true);
1023                 if (ret < 0)
1024                         return ret;
1025
1026                 /*
1027                  * in case of dpms on(standby), fimd_apply function will
1028                  * be called by encoder's dpms callback to update fimd's
1029                  * registers but in case of sleep wakeup, it's not.
1030                  * so fimd_apply function should be called at here.
1031                  */
1032                 fimd_apply(dev);
1033         }
1034
1035         return 0;
1036 }
1037 #endif
1038
1039 #ifdef CONFIG_PM_RUNTIME
1040 static int fimd_runtime_suspend(struct device *dev)
1041 {
1042         struct fimd_context *ctx = get_fimd_context(dev);
1043
1044         DRM_DEBUG_KMS("%s\n", __FILE__);
1045
1046         return fimd_activate(ctx, false);
1047 }
1048
1049 static int fimd_runtime_resume(struct device *dev)
1050 {
1051         struct fimd_context *ctx = get_fimd_context(dev);
1052
1053         DRM_DEBUG_KMS("%s\n", __FILE__);
1054
1055         return fimd_activate(ctx, true);
1056 }
1057 #endif
1058
1059 static struct platform_device_id fimd_driver_ids[] = {
1060         {
1061                 .name           = "exynos4-fb",
1062                 .driver_data    = (unsigned long)&exynos4_fimd_driver_data,
1063         }, {
1064                 .name           = "exynos5-fb",
1065                 .driver_data    = (unsigned long)&exynos5_fimd_driver_data,
1066         },
1067         {},
1068 };
1069 MODULE_DEVICE_TABLE(platform, fimd_driver_ids);
1070
1071 static const struct dev_pm_ops fimd_pm_ops = {
1072         SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume)
1073         SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL)
1074 };
1075
1076 struct platform_driver fimd_driver = {
1077         .probe          = fimd_probe,
1078         .remove         = fimd_remove,
1079         .id_table       = fimd_driver_ids,
1080         .driver         = {
1081                 .name   = "exynos4-fb",
1082                 .owner  = THIS_MODULE,
1083                 .pm     = &fimd_pm_ops,
1084                 .of_match_table = of_match_ptr(fimd_driver_dt_match),
1085         },
1086 };