1// SPDX-License-Identifier: GPL-2.0-or-later 2/* drivers/gpu/drm/exynos/exynos7_drm_decon.c 3 * 4 * Copyright (C) 2014 Samsung Electronics Co.Ltd 5 * Authors: 6 * Akshu Agarwal <akshua@gmail.com> 7 * Ajay Kumar <ajaykumar.rs@samsung.com> 8 */ 9 10#include <linux/clk.h> 11#include <linux/component.h> 12#include <linux/kernel.h> 13#include <linux/of.h> 14#include <linux/of_address.h> 15#include <linux/platform_device.h> 16#include <linux/pm_runtime.h> 17 18#include <video/of_display_timing.h> 19#include <video/of_videomode.h> 20 21#include <drm/drm_fourcc.h> 22#include <drm/drm_framebuffer.h> 23#include <drm/drm_vblank.h> 24#include <drm/exynos_drm.h> 25 26#include "exynos_drm_crtc.h" 27#include "exynos_drm_drv.h" 28#include "exynos_drm_fb.h" 29#include "exynos_drm_plane.h" 30#include "regs-decon7.h" 31 32/* 33 * DECON stands for Display and Enhancement controller. 34 */ 35 36#define MIN_FB_WIDTH_FOR_16WORD_BURST 128 37 38#define WINDOWS_NR 2 39 40struct decon_context { 41 struct device *dev; 42 struct drm_device *drm_dev; 43 void *dma_priv; 44 struct exynos_drm_crtc *crtc; 45 struct exynos_drm_plane planes[WINDOWS_NR]; 46 struct exynos_drm_plane_config configs[WINDOWS_NR]; 47 struct clk *pclk; 48 struct clk *aclk; 49 struct clk *eclk; 50 struct clk *vclk; 51 void __iomem *regs; 52 unsigned long irq_flags; 53 bool i80_if; 54 bool suspended; 55 wait_queue_head_t wait_vsync_queue; 56 atomic_t wait_vsync_event; 57 58 struct drm_encoder *encoder; 59}; 60 61static const struct of_device_id decon_driver_dt_match[] = { 62 {.compatible = "samsung,exynos7-decon"}, 63 {}, 64}; 65MODULE_DEVICE_TABLE(of, decon_driver_dt_match); 66 67static const uint32_t decon_formats[] = { 68 DRM_FORMAT_RGB565, 69 DRM_FORMAT_XRGB8888, 70 DRM_FORMAT_XBGR8888, 71 DRM_FORMAT_RGBX8888, 72 DRM_FORMAT_BGRX8888, 73 DRM_FORMAT_ARGB8888, 74 DRM_FORMAT_ABGR8888, 75 DRM_FORMAT_RGBA8888, 76 DRM_FORMAT_BGRA8888, 77}; 78 79static const enum drm_plane_type decon_win_types[WINDOWS_NR] = { 80 DRM_PLANE_TYPE_PRIMARY, 81 DRM_PLANE_TYPE_CURSOR, 82}; 83 84static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc) 85{ 86 struct decon_context *ctx = crtc->ctx; 87 88 if (ctx->suspended) 89 return; 90 91 atomic_set(&ctx->wait_vsync_event, 1); 92 93 /* 94 * wait for DECON to signal VSYNC interrupt or return after 95 * timeout which is set to 50ms (refresh rate of 20). 96 */ 97 if (!wait_event_timeout(ctx->wait_vsync_queue, 98 !atomic_read(&ctx->wait_vsync_event), 99 HZ/20)) 100 DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n"); 101} 102 103static void decon_clear_channels(struct exynos_drm_crtc *crtc) 104{ 105 struct decon_context *ctx = crtc->ctx; 106 unsigned int win, ch_enabled = 0; 107 108 /* Check if any channel is enabled. */ 109 for (win = 0; win < WINDOWS_NR; win++) { 110 u32 val = readl(ctx->regs + WINCON(win)); 111 112 if (val & WINCONx_ENWIN) { 113 val &= ~WINCONx_ENWIN; 114 writel(val, ctx->regs + WINCON(win)); 115 ch_enabled = 1; 116 } 117 } 118 119 /* Wait for vsync, as disable channel takes effect at next vsync */ 120 if (ch_enabled) 121 decon_wait_for_vblank(ctx->crtc); 122} 123 124static int decon_ctx_initialize(struct decon_context *ctx, 125 struct drm_device *drm_dev) 126{ 127 ctx->drm_dev = drm_dev; 128 129 decon_clear_channels(ctx->crtc); 130 131 return exynos_drm_register_dma(drm_dev, ctx->dev, &ctx->dma_priv); 132} 133 134static void decon_ctx_remove(struct decon_context *ctx) 135{ 136 /* detach this sub driver from iommu mapping if supported. */ 137 exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv); 138} 139 140static u32 decon_calc_clkdiv(struct decon_context *ctx, 141 const struct drm_display_mode *mode) 142{ 143 unsigned long ideal_clk = mode->clock; 144 u32 clkdiv; 145 146 /* Find the clock divider value that gets us closest to ideal_clk */ 147 clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk); 148 149 return (clkdiv < 0x100) ? clkdiv : 0xff; 150} 151 152static void decon_commit(struct exynos_drm_crtc *crtc) 153{ 154 struct decon_context *ctx = crtc->ctx; 155 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode; 156 u32 val, clkdiv; 157 158 if (ctx->suspended) 159 return; 160 161 /* nothing to do if we haven't set the mode yet */ 162 if (mode->htotal == 0 || mode->vtotal == 0) 163 return; 164 165 if (!ctx->i80_if) { 166 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd; 167 /* setup vertical timing values. */ 168 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start; 169 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end; 170 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay; 171 172 val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1); 173 writel(val, ctx->regs + VIDTCON0); 174 175 val = VIDTCON1_VSPW(vsync_len - 1); 176 writel(val, ctx->regs + VIDTCON1); 177 178 /* setup horizontal timing values. */ 179 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start; 180 hbpd = mode->crtc_htotal - mode->crtc_hsync_end; 181 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay; 182 183 /* setup horizontal timing values. */ 184 val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1); 185 writel(val, ctx->regs + VIDTCON2); 186 187 val = VIDTCON3_HSPW(hsync_len - 1); 188 writel(val, ctx->regs + VIDTCON3); 189 } 190 191 /* setup horizontal and vertical display size. */ 192 val = VIDTCON4_LINEVAL(mode->vdisplay - 1) | 193 VIDTCON4_HOZVAL(mode->hdisplay - 1); 194 writel(val, ctx->regs + VIDTCON4); 195 196 writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD); 197 198 /* 199 * fields of register with prefix '_F' would be updated 200 * at vsync(same as dma start) 201 */ 202 val = VIDCON0_ENVID | VIDCON0_ENVID_F; 203 writel(val, ctx->regs + VIDCON0); 204 205 clkdiv = decon_calc_clkdiv(ctx, mode); 206 if (clkdiv > 1) { 207 val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1); 208 writel(val, ctx->regs + VCLKCON1); 209 writel(val, ctx->regs + VCLKCON2); 210 } 211 212 val = readl(ctx->regs + DECON_UPDATE); 213 val |= DECON_UPDATE_STANDALONE_F; 214 writel(val, ctx->regs + DECON_UPDATE); 215} 216 217static int decon_enable_vblank(struct exynos_drm_crtc *crtc) 218{ 219 struct decon_context *ctx = crtc->ctx; 220 u32 val; 221 222 if (ctx->suspended) 223 return -EPERM; 224 225 if (!test_and_set_bit(0, &ctx->irq_flags)) { 226 val = readl(ctx->regs + VIDINTCON0); 227 228 val |= VIDINTCON0_INT_ENABLE; 229 230 if (!ctx->i80_if) { 231 val |= VIDINTCON0_INT_FRAME; 232 val &= ~VIDINTCON0_FRAMESEL0_MASK; 233 val |= VIDINTCON0_FRAMESEL0_VSYNC; 234 } 235 236 writel(val, ctx->regs + VIDINTCON0); 237 } 238 239 return 0; 240} 241 242static void decon_disable_vblank(struct exynos_drm_crtc *crtc) 243{ 244 struct decon_context *ctx = crtc->ctx; 245 u32 val; 246 247 if (ctx->suspended) 248 return; 249 250 if (test_and_clear_bit(0, &ctx->irq_flags)) { 251 val = readl(ctx->regs + VIDINTCON0); 252 253 val &= ~VIDINTCON0_INT_ENABLE; 254 if (!ctx->i80_if) 255 val &= ~VIDINTCON0_INT_FRAME; 256 257 writel(val, ctx->regs + VIDINTCON0); 258 } 259} 260 261static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win, 262 struct drm_framebuffer *fb) 263{ 264 unsigned long val; 265 int padding; 266 267 val = readl(ctx->regs + WINCON(win)); 268 val &= ~WINCONx_BPPMODE_MASK; 269 270 switch (fb->format->format) { 271 case DRM_FORMAT_RGB565: 272 val |= WINCONx_BPPMODE_16BPP_565; 273 val |= WINCONx_BURSTLEN_16WORD; 274 break; 275 case DRM_FORMAT_XRGB8888: 276 val |= WINCONx_BPPMODE_24BPP_xRGB; 277 val |= WINCONx_BURSTLEN_16WORD; 278 break; 279 case DRM_FORMAT_XBGR8888: 280 val |= WINCONx_BPPMODE_24BPP_xBGR; 281 val |= WINCONx_BURSTLEN_16WORD; 282 break; 283 case DRM_FORMAT_RGBX8888: 284 val |= WINCONx_BPPMODE_24BPP_RGBx; 285 val |= WINCONx_BURSTLEN_16WORD; 286 break; 287 case DRM_FORMAT_BGRX8888: 288 val |= WINCONx_BPPMODE_24BPP_BGRx; 289 val |= WINCONx_BURSTLEN_16WORD; 290 break; 291 case DRM_FORMAT_ARGB8888: 292 val |= WINCONx_BPPMODE_32BPP_ARGB | WINCONx_BLD_PIX | 293 WINCONx_ALPHA_SEL; 294 val |= WINCONx_BURSTLEN_16WORD; 295 break; 296 case DRM_FORMAT_ABGR8888: 297 val |= WINCONx_BPPMODE_32BPP_ABGR | WINCONx_BLD_PIX | 298 WINCONx_ALPHA_SEL; 299 val |= WINCONx_BURSTLEN_16WORD; 300 break; 301 case DRM_FORMAT_RGBA8888: 302 val |= WINCONx_BPPMODE_32BPP_RGBA | WINCONx_BLD_PIX | 303 WINCONx_ALPHA_SEL; 304 val |= WINCONx_BURSTLEN_16WORD; 305 break; 306 case DRM_FORMAT_BGRA8888: 307 default: 308 val |= WINCONx_BPPMODE_32BPP_BGRA | WINCONx_BLD_PIX | 309 WINCONx_ALPHA_SEL; 310 val |= WINCONx_BURSTLEN_16WORD; 311 break; 312 } 313 314 DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]); 315 316 /* 317 * In case of exynos, setting dma-burst to 16Word causes permanent 318 * tearing for very small buffers, e.g. cursor buffer. Burst Mode 319 * switching which is based on plane size is not recommended as 320 * plane size varies a lot towards the end of the screen and rapid 321 * movement causes unstable DMA which results into iommu crash/tear. 322 */ 323 324 padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width; 325 if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) { 326 val &= ~WINCONx_BURSTLEN_MASK; 327 val |= WINCONx_BURSTLEN_8WORD; 328 } 329 330 writel(val, ctx->regs + WINCON(win)); 331} 332 333static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win) 334{ 335 unsigned int keycon0 = 0, keycon1 = 0; 336 337 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F | 338 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0); 339 340 keycon1 = WxKEYCON1_COLVAL(0xffffffff); 341 342 writel(keycon0, ctx->regs + WKEYCON0_BASE(win)); 343 writel(keycon1, ctx->regs + WKEYCON1_BASE(win)); 344} 345 346/** 347 * decon_shadow_protect_win() - disable updating values from shadow registers at vsync 348 * 349 * @ctx: display and enhancement controller context 350 * @win: window to protect registers for 351 * @protect: 1 to protect (disable updates) 352 */ 353static void decon_shadow_protect_win(struct decon_context *ctx, 354 unsigned int win, bool protect) 355{ 356 u32 bits, val; 357 358 bits = SHADOWCON_WINx_PROTECT(win); 359 360 val = readl(ctx->regs + SHADOWCON); 361 if (protect) 362 val |= bits; 363 else 364 val &= ~bits; 365 writel(val, ctx->regs + SHADOWCON); 366} 367 368static void decon_atomic_begin(struct exynos_drm_crtc *crtc) 369{ 370 struct decon_context *ctx = crtc->ctx; 371 int i; 372 373 if (ctx->suspended) 374 return; 375 376 for (i = 0; i < WINDOWS_NR; i++) 377 decon_shadow_protect_win(ctx, i, true); 378} 379 380static void decon_update_plane(struct exynos_drm_crtc *crtc, 381 struct exynos_drm_plane *plane) 382{ 383 struct exynos_drm_plane_state *state = 384 to_exynos_plane_state(plane->base.state); 385 struct decon_context *ctx = crtc->ctx; 386 struct drm_framebuffer *fb = state->base.fb; 387 int padding; 388 unsigned long val, alpha; 389 unsigned int last_x; 390 unsigned int last_y; 391 unsigned int win = plane->index; 392 unsigned int cpp = fb->format->cpp[0]; 393 unsigned int pitch = fb->pitches[0]; 394 395 if (ctx->suspended) 396 return; 397 398 /* 399 * SHADOWCON/PRTCON register is used for enabling timing. 400 * 401 * for example, once only width value of a register is set, 402 * if the dma is started then decon hardware could malfunction so 403 * with protect window setting, the register fields with prefix '_F' 404 * wouldn't be updated at vsync also but updated once unprotect window 405 * is set. 406 */ 407 408 /* buffer start address */ 409 val = (unsigned long)exynos_drm_fb_dma_addr(fb, 0); 410 writel(val, ctx->regs + VIDW_BUF_START(win)); 411 412 padding = (pitch / cpp) - fb->width; 413 414 /* buffer size */ 415 writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win)); 416 writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win)); 417 418 /* offset from the start of the buffer to read */ 419 writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win)); 420 writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win)); 421 422 DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n", 423 (unsigned long)val); 424 DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n", 425 state->crtc.w, state->crtc.h); 426 427 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) | 428 VIDOSDxA_TOPLEFT_Y(state->crtc.y); 429 writel(val, ctx->regs + VIDOSD_A(win)); 430 431 last_x = state->crtc.x + state->crtc.w; 432 if (last_x) 433 last_x--; 434 last_y = state->crtc.y + state->crtc.h; 435 if (last_y) 436 last_y--; 437 438 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y); 439 440 writel(val, ctx->regs + VIDOSD_B(win)); 441 442 DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n", 443 state->crtc.x, state->crtc.y, last_x, last_y); 444 445 /* OSD alpha */ 446 alpha = VIDOSDxC_ALPHA0_R_F(0x0) | 447 VIDOSDxC_ALPHA0_G_F(0x0) | 448 VIDOSDxC_ALPHA0_B_F(0x0); 449 450 writel(alpha, ctx->regs + VIDOSD_C(win)); 451 452 alpha = VIDOSDxD_ALPHA1_R_F(0xff) | 453 VIDOSDxD_ALPHA1_G_F(0xff) | 454 VIDOSDxD_ALPHA1_B_F(0xff); 455 456 writel(alpha, ctx->regs + VIDOSD_D(win)); 457 458 decon_win_set_pixfmt(ctx, win, fb); 459 460 /* hardware window 0 doesn't support color key. */ 461 if (win != 0) 462 decon_win_set_colkey(ctx, win); 463 464 /* wincon */ 465 val = readl(ctx->regs + WINCON(win)); 466 val |= WINCONx_TRIPLE_BUF_MODE; 467 val |= WINCONx_ENWIN; 468 writel(val, ctx->regs + WINCON(win)); 469 470 /* Enable DMA channel and unprotect windows */ 471 decon_shadow_protect_win(ctx, win, false); 472 473 val = readl(ctx->regs + DECON_UPDATE); 474 val |= DECON_UPDATE_STANDALONE_F; 475 writel(val, ctx->regs + DECON_UPDATE); 476} 477 478static void decon_disable_plane(struct exynos_drm_crtc *crtc, 479 struct exynos_drm_plane *plane) 480{ 481 struct decon_context *ctx = crtc->ctx; 482 unsigned int win = plane->index; 483 u32 val; 484 485 if (ctx->suspended) 486 return; 487 488 /* protect windows */ 489 decon_shadow_protect_win(ctx, win, true); 490 491 /* wincon */ 492 val = readl(ctx->regs + WINCON(win)); 493 val &= ~WINCONx_ENWIN; 494 writel(val, ctx->regs + WINCON(win)); 495 496 val = readl(ctx->regs + DECON_UPDATE); 497 val |= DECON_UPDATE_STANDALONE_F; 498 writel(val, ctx->regs + DECON_UPDATE); 499} 500 501static void decon_atomic_flush(struct exynos_drm_crtc *crtc) 502{ 503 struct decon_context *ctx = crtc->ctx; 504 int i; 505 506 if (ctx->suspended) 507 return; 508 509 for (i = 0; i < WINDOWS_NR; i++) 510 decon_shadow_protect_win(ctx, i, false); 511 exynos_crtc_handle_event(crtc); 512} 513 514static void decon_init(struct decon_context *ctx) 515{ 516 u32 val; 517 518 writel(VIDCON0_SWRESET, ctx->regs + VIDCON0); 519 520 val = VIDOUTCON0_DISP_IF_0_ON; 521 if (!ctx->i80_if) 522 val |= VIDOUTCON0_RGBIF; 523 writel(val, ctx->regs + VIDOUTCON0); 524 525 writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0); 526 527 if (!ctx->i80_if) 528 writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0)); 529} 530 531static void decon_atomic_enable(struct exynos_drm_crtc *crtc) 532{ 533 struct decon_context *ctx = crtc->ctx; 534 int ret; 535 536 if (!ctx->suspended) 537 return; 538 539 ret = pm_runtime_resume_and_get(ctx->dev); 540 if (ret < 0) { 541 DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n"); 542 return; 543 } 544 545 decon_init(ctx); 546 547 /* if vblank was enabled status, enable it again. */ 548 if (test_and_clear_bit(0, &ctx->irq_flags)) 549 decon_enable_vblank(ctx->crtc); 550 551 decon_commit(ctx->crtc); 552 553 ctx->suspended = false; 554} 555 556static void decon_atomic_disable(struct exynos_drm_crtc *crtc) 557{ 558 struct decon_context *ctx = crtc->ctx; 559 int i; 560 561 if (ctx->suspended) 562 return; 563 564 /* 565 * We need to make sure that all windows are disabled before we 566 * suspend that connector. Otherwise we might try to scan from 567 * a destroyed buffer later. 568 */ 569 for (i = 0; i < WINDOWS_NR; i++) 570 decon_disable_plane(crtc, &ctx->planes[i]); 571 572 pm_runtime_put_sync(ctx->dev); 573 574 ctx->suspended = true; 575} 576 577static const struct exynos_drm_crtc_ops decon_crtc_ops = { 578 .atomic_enable = decon_atomic_enable, 579 .atomic_disable = decon_atomic_disable, 580 .enable_vblank = decon_enable_vblank, 581 .disable_vblank = decon_disable_vblank, 582 .atomic_begin = decon_atomic_begin, 583 .update_plane = decon_update_plane, 584 .disable_plane = decon_disable_plane, 585 .atomic_flush = decon_atomic_flush, 586}; 587 588 589static irqreturn_t decon_irq_handler(int irq, void *dev_id) 590{ 591 struct decon_context *ctx = (struct decon_context *)dev_id; 592 u32 val, clear_bit; 593 594 val = readl(ctx->regs + VIDINTCON1); 595 596 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME; 597 if (val & clear_bit) 598 writel(clear_bit, ctx->regs + VIDINTCON1); 599 600 /* check the crtc is detached already from encoder */ 601 if (!ctx->drm_dev) 602 goto out; 603 604 if (!ctx->i80_if) { 605 drm_crtc_handle_vblank(&ctx->crtc->base); 606 607 /* set wait vsync event to zero and wake up queue. */ 608 if (atomic_read(&ctx->wait_vsync_event)) { 609 atomic_set(&ctx->wait_vsync_event, 0); 610 wake_up(&ctx->wait_vsync_queue); 611 } 612 } 613out: 614 return IRQ_HANDLED; 615} 616 617static int decon_bind(struct device *dev, struct device *master, void *data) 618{ 619 struct decon_context *ctx = dev_get_drvdata(dev); 620 struct drm_device *drm_dev = data; 621 struct exynos_drm_plane *exynos_plane; 622 unsigned int i; 623 int ret; 624 625 ret = decon_ctx_initialize(ctx, drm_dev); 626 if (ret) { 627 DRM_DEV_ERROR(dev, "decon_ctx_initialize failed.\n"); 628 return ret; 629 } 630 631 for (i = 0; i < WINDOWS_NR; i++) { 632 ctx->configs[i].pixel_formats = decon_formats; 633 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats); 634 ctx->configs[i].zpos = i; 635 ctx->configs[i].type = decon_win_types[i]; 636 637 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i, 638 &ctx->configs[i]); 639 if (ret) 640 return ret; 641 } 642 643 exynos_plane = &ctx->planes[DEFAULT_WIN]; 644 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, 645 EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx); 646 if (IS_ERR(ctx->crtc)) { 647 decon_ctx_remove(ctx); 648 return PTR_ERR(ctx->crtc); 649 } 650 651 if (ctx->encoder) 652 exynos_dpi_bind(drm_dev, ctx->encoder); 653 654 return 0; 655 656} 657 658static void decon_unbind(struct device *dev, struct device *master, 659 void *data) 660{ 661 struct decon_context *ctx = dev_get_drvdata(dev); 662 663 decon_atomic_disable(ctx->crtc); 664 665 if (ctx->encoder) 666 exynos_dpi_remove(ctx->encoder); 667 668 decon_ctx_remove(ctx); 669} 670 671static const struct component_ops decon_component_ops = { 672 .bind = decon_bind, 673 .unbind = decon_unbind, 674}; 675 676static int decon_probe(struct platform_device *pdev) 677{ 678 struct device *dev = &pdev->dev; 679 struct decon_context *ctx; 680 struct device_node *i80_if_timings; 681 int ret; 682 683 if (!dev->of_node) 684 return -ENODEV; 685 686 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 687 if (!ctx) 688 return -ENOMEM; 689 690 ctx->dev = dev; 691 ctx->suspended = true; 692 693 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings"); 694 if (i80_if_timings) 695 ctx->i80_if = true; 696 of_node_put(i80_if_timings); 697 698 ctx->regs = of_iomap(dev->of_node, 0); 699 if (!ctx->regs) 700 return -ENOMEM; 701 702 ctx->pclk = devm_clk_get(dev, "pclk_decon0"); 703 if (IS_ERR(ctx->pclk)) { 704 dev_err(dev, "failed to get bus clock pclk\n"); 705 ret = PTR_ERR(ctx->pclk); 706 goto err_iounmap; 707 } 708 709 ctx->aclk = devm_clk_get(dev, "aclk_decon0"); 710 if (IS_ERR(ctx->aclk)) { 711 dev_err(dev, "failed to get bus clock aclk\n"); 712 ret = PTR_ERR(ctx->aclk); 713 goto err_iounmap; 714 } 715 716 ctx->eclk = devm_clk_get(dev, "decon0_eclk"); 717 if (IS_ERR(ctx->eclk)) { 718 dev_err(dev, "failed to get eclock\n"); 719 ret = PTR_ERR(ctx->eclk); 720 goto err_iounmap; 721 } 722 723 ctx->vclk = devm_clk_get(dev, "decon0_vclk"); 724 if (IS_ERR(ctx->vclk)) { 725 dev_err(dev, "failed to get vclock\n"); 726 ret = PTR_ERR(ctx->vclk); 727 goto err_iounmap; 728 } 729 730 ret = platform_get_irq_byname(pdev, ctx->i80_if ? "lcd_sys" : "vsync"); 731 if (ret < 0) 732 goto err_iounmap; 733 734 ret = devm_request_irq(dev, ret, decon_irq_handler, 0, "drm_decon", ctx); 735 if (ret) { 736 dev_err(dev, "irq request failed.\n"); 737 goto err_iounmap; 738 } 739 740 init_waitqueue_head(&ctx->wait_vsync_queue); 741 atomic_set(&ctx->wait_vsync_event, 0); 742 743 platform_set_drvdata(pdev, ctx); 744 745 ctx->encoder = exynos_dpi_probe(dev); 746 if (IS_ERR(ctx->encoder)) { 747 ret = PTR_ERR(ctx->encoder); 748 goto err_iounmap; 749 } 750 751 pm_runtime_enable(dev); 752 753 ret = component_add(dev, &decon_component_ops); 754 if (ret) 755 goto err_disable_pm_runtime; 756 757 return ret; 758 759err_disable_pm_runtime: 760 pm_runtime_disable(dev); 761 762err_iounmap: 763 iounmap(ctx->regs); 764 765 return ret; 766} 767 768static void decon_remove(struct platform_device *pdev) 769{ 770 struct decon_context *ctx = dev_get_drvdata(&pdev->dev); 771 772 pm_runtime_disable(&pdev->dev); 773 774 iounmap(ctx->regs); 775 776 component_del(&pdev->dev, &decon_component_ops); 777} 778 779static int exynos7_decon_suspend(struct device *dev) 780{ 781 struct decon_context *ctx = dev_get_drvdata(dev); 782 783 clk_disable_unprepare(ctx->vclk); 784 clk_disable_unprepare(ctx->eclk); 785 clk_disable_unprepare(ctx->aclk); 786 clk_disable_unprepare(ctx->pclk); 787 788 return 0; 789} 790 791static int exynos7_decon_resume(struct device *dev) 792{ 793 struct decon_context *ctx = dev_get_drvdata(dev); 794 int ret; 795 796 ret = clk_prepare_enable(ctx->pclk); 797 if (ret < 0) { 798 DRM_DEV_ERROR(dev, "Failed to prepare_enable the pclk [%d]\n", 799 ret); 800 goto err_pclk_enable; 801 } 802 803 ret = clk_prepare_enable(ctx->aclk); 804 if (ret < 0) { 805 DRM_DEV_ERROR(dev, "Failed to prepare_enable the aclk [%d]\n", 806 ret); 807 goto err_aclk_enable; 808 } 809 810 ret = clk_prepare_enable(ctx->eclk); 811 if (ret < 0) { 812 DRM_DEV_ERROR(dev, "Failed to prepare_enable the eclk [%d]\n", 813 ret); 814 goto err_eclk_enable; 815 } 816 817 ret = clk_prepare_enable(ctx->vclk); 818 if (ret < 0) { 819 DRM_DEV_ERROR(dev, "Failed to prepare_enable the vclk [%d]\n", 820 ret); 821 goto err_vclk_enable; 822 } 823 824 return 0; 825 826err_vclk_enable: 827 clk_disable_unprepare(ctx->eclk); 828err_eclk_enable: 829 clk_disable_unprepare(ctx->aclk); 830err_aclk_enable: 831 clk_disable_unprepare(ctx->pclk); 832err_pclk_enable: 833 return ret; 834} 835 836static DEFINE_RUNTIME_DEV_PM_OPS(exynos7_decon_pm_ops, exynos7_decon_suspend, 837 exynos7_decon_resume, NULL); 838 839struct platform_driver decon_driver = { 840 .probe = decon_probe, 841 .remove_new = decon_remove, 842 .driver = { 843 .name = "exynos-decon", 844 .pm = pm_ptr(&exynos7_decon_pm_ops), 845 .of_match_table = decon_driver_dt_match, 846 }, 847}; 848