1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * OMAP1 internal LCD controller 4 * 5 * Copyright (C) 2004 Nokia Corporation 6 * Author: Imre Deak <imre.deak@nokia.com> 7 */ 8 #include <linux/module.h> 9 #include <linux/device.h> 10 #include <linux/interrupt.h> 11 #include <linux/spinlock.h> 12 #include <linux/err.h> 13 #include <linux/mm.h> 14 #include <linux/fb.h> 15 #include <linux/dma-mapping.h> 16 #include <linux/vmalloc.h> 17 #include <linux/clk.h> 18 #include <linux/gfp.h> 19 20 #include <linux/soc/ti/omap1-io.h> 21 #include <linux/soc/ti/omap1-soc.h> 22 #include <linux/omap-dma.h> 23 24 #include <asm/mach-types.h> 25 26 #include "omapfb.h" 27 28 #include "lcdc.h" 29 #include "lcd_dma.h" 30 31 #define MODULE_NAME "lcdc" 32 33 #define MAX_PALETTE_SIZE PAGE_SIZE 34 35 enum lcdc_load_mode { 36 OMAP_LCDC_LOAD_PALETTE, 37 OMAP_LCDC_LOAD_FRAME, 38 OMAP_LCDC_LOAD_PALETTE_AND_FRAME 39 }; 40 41 static struct omap_lcd_controller { 42 enum omapfb_update_mode update_mode; 43 int ext_mode; 44 45 unsigned long frame_offset; 46 int screen_width; 47 int xres; 48 int yres; 49 50 enum omapfb_color_format color_mode; 51 int bpp; 52 void *palette_virt; 53 dma_addr_t palette_phys; 54 int palette_code; 55 int palette_size; 56 57 unsigned int irq_mask; 58 struct completion last_frame_complete; 59 struct completion palette_load_complete; 60 struct clk *lcd_ck; 61 struct omapfb_device *fbdev; 62 63 void (*dma_callback)(void *data); 64 void *dma_callback_data; 65 66 dma_addr_t vram_phys; 67 void *vram_virt; 68 unsigned long vram_size; 69 } lcdc; 70 71 static inline void enable_irqs(int mask) 72 { 73 lcdc.irq_mask |= mask; 74 } 75 76 static inline void disable_irqs(int mask) 77 { 78 lcdc.irq_mask &= ~mask; 79 } 80 81 static void set_load_mode(enum lcdc_load_mode mode) 82 { 83 u32 l; 84 85 l = omap_readl(OMAP_LCDC_CONTROL); 86 l &= ~(3 << 20); 87 switch (mode) { 88 case OMAP_LCDC_LOAD_PALETTE: 89 l |= 1 << 20; 90 break; 91 case OMAP_LCDC_LOAD_FRAME: 92 l |= 2 << 20; 93 break; 94 case OMAP_LCDC_LOAD_PALETTE_AND_FRAME: 95 break; 96 default: 97 BUG(); 98 } 99 omap_writel(l, OMAP_LCDC_CONTROL); 100 } 101 102 static void enable_controller(void) 103 { 104 u32 l; 105 106 l = omap_readl(OMAP_LCDC_CONTROL); 107 l |= OMAP_LCDC_CTRL_LCD_EN; 108 l &= ~OMAP_LCDC_IRQ_MASK; 109 l |= lcdc.irq_mask | OMAP_LCDC_IRQ_DONE; /* enabled IRQs */ 110 omap_writel(l, OMAP_LCDC_CONTROL); 111 } 112 113 static void disable_controller_async(void) 114 { 115 u32 l; 116 u32 mask; 117 118 l = omap_readl(OMAP_LCDC_CONTROL); 119 mask = OMAP_LCDC_CTRL_LCD_EN | OMAP_LCDC_IRQ_MASK; 120 /* 121 * Preserve the DONE mask, since we still want to get the 122 * final DONE irq. It will be disabled in the IRQ handler. 123 */ 124 mask &= ~OMAP_LCDC_IRQ_DONE; 125 l &= ~mask; 126 omap_writel(l, OMAP_LCDC_CONTROL); 127 } 128 129 static void disable_controller(void) 130 { 131 init_completion(&lcdc.last_frame_complete); 132 disable_controller_async(); 133 if (!wait_for_completion_timeout(&lcdc.last_frame_complete, 134 msecs_to_jiffies(500))) 135 dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); 136 } 137 138 static void reset_controller(u32 status) 139 { 140 static unsigned long reset_count; 141 static unsigned long last_jiffies; 142 143 disable_controller_async(); 144 reset_count++; 145 if (reset_count == 1 || time_after(jiffies, last_jiffies + HZ)) { 146 dev_err(lcdc.fbdev->dev, 147 "resetting (status %#010x,reset count %lu)\n", 148 status, reset_count); 149 last_jiffies = jiffies; 150 } 151 if (reset_count < 100) { 152 enable_controller(); 153 } else { 154 reset_count = 0; 155 dev_err(lcdc.fbdev->dev, 156 "too many reset attempts, giving up.\n"); 157 } 158 } 159 160 /* 161 * Configure the LCD DMA according to the current mode specified by parameters 162 * in lcdc.fbdev and fbdev->var. 163 */ 164 static void setup_lcd_dma(void) 165 { 166 static const int dma_elem_type[] = { 167 0, 168 OMAP_DMA_DATA_TYPE_S8, 169 OMAP_DMA_DATA_TYPE_S16, 170 0, 171 OMAP_DMA_DATA_TYPE_S32, 172 }; 173 struct omapfb_plane_struct *plane = lcdc.fbdev->fb_info[0]->par; 174 struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; 175 unsigned long src; 176 int esize, xelem, yelem; 177 178 src = lcdc.vram_phys + lcdc.frame_offset; 179 180 switch (var->rotate) { 181 case 0: 182 if (plane->info.mirror || (src & 3) || 183 lcdc.color_mode == OMAPFB_COLOR_YUV420 || 184 (lcdc.xres & 1)) 185 esize = 2; 186 else 187 esize = 4; 188 xelem = lcdc.xres * lcdc.bpp / 8 / esize; 189 yelem = lcdc.yres; 190 break; 191 case 90: 192 case 180: 193 case 270: 194 if (cpu_is_omap15xx()) { 195 BUG(); 196 } 197 esize = 2; 198 xelem = lcdc.yres * lcdc.bpp / 16; 199 yelem = lcdc.xres; 200 break; 201 default: 202 BUG(); 203 return; 204 } 205 #ifdef VERBOSE 206 dev_dbg(lcdc.fbdev->dev, 207 "setup_dma: src %#010lx esize %d xelem %d yelem %d\n", 208 src, esize, xelem, yelem); 209 #endif 210 omap_set_lcd_dma_b1(src, xelem, yelem, dma_elem_type[esize]); 211 if (!cpu_is_omap15xx()) { 212 int bpp = lcdc.bpp; 213 214 /* 215 * YUV support is only for external mode when we have the 216 * YUV window embedded in a 16bpp frame buffer. 217 */ 218 if (lcdc.color_mode == OMAPFB_COLOR_YUV420) 219 bpp = 16; 220 /* Set virtual xres elem size */ 221 omap_set_lcd_dma_b1_vxres( 222 lcdc.screen_width * bpp / 8 / esize); 223 /* Setup transformations */ 224 omap_set_lcd_dma_b1_rotation(var->rotate); 225 omap_set_lcd_dma_b1_mirror(plane->info.mirror); 226 } 227 omap_setup_lcd_dma(); 228 } 229 230 static irqreturn_t lcdc_irq_handler(int irq, void *dev_id) 231 { 232 u32 status; 233 234 status = omap_readl(OMAP_LCDC_STATUS); 235 236 if (status & (OMAP_LCDC_STAT_FUF | OMAP_LCDC_STAT_SYNC_LOST)) 237 reset_controller(status); 238 else { 239 if (status & OMAP_LCDC_STAT_DONE) { 240 u32 l; 241 242 /* 243 * Disable IRQ_DONE. The status bit will be cleared 244 * only when the controller is reenabled and we don't 245 * want to get more interrupts. 246 */ 247 l = omap_readl(OMAP_LCDC_CONTROL); 248 l &= ~OMAP_LCDC_IRQ_DONE; 249 omap_writel(l, OMAP_LCDC_CONTROL); 250 complete(&lcdc.last_frame_complete); 251 } 252 if (status & OMAP_LCDC_STAT_LOADED_PALETTE) { 253 disable_controller_async(); 254 complete(&lcdc.palette_load_complete); 255 } 256 } 257 258 /* 259 * Clear these interrupt status bits. 260 * Sync_lost, FUF bits were cleared by disabling the LCD controller 261 * LOADED_PALETTE can be cleared this way only in palette only 262 * load mode. In other load modes it's cleared by disabling the 263 * controller. 264 */ 265 status &= ~(OMAP_LCDC_STAT_VSYNC | 266 OMAP_LCDC_STAT_LOADED_PALETTE | 267 OMAP_LCDC_STAT_ABC | 268 OMAP_LCDC_STAT_LINE_INT); 269 omap_writel(status, OMAP_LCDC_STATUS); 270 return IRQ_HANDLED; 271 } 272 273 /* 274 * Change to a new video mode. We defer this to a later time to avoid any 275 * flicker and not to mess up the current LCD DMA context. For this we disable 276 * the LCD controller, which will generate a DONE irq after the last frame has 277 * been transferred. Then it'll be safe to reconfigure both the LCD controller 278 * as well as the LCD DMA. 279 */ 280 static int omap_lcdc_setup_plane(int plane, int channel_out, 281 unsigned long offset, int screen_width, 282 int pos_x, int pos_y, int width, int height, 283 int color_mode) 284 { 285 struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; 286 struct lcd_panel *panel = lcdc.fbdev->panel; 287 int rot_x, rot_y; 288 289 if (var->rotate == 0) { 290 rot_x = panel->x_res; 291 rot_y = panel->y_res; 292 } else { 293 rot_x = panel->y_res; 294 rot_y = panel->x_res; 295 } 296 if (plane != 0 || channel_out != 0 || pos_x != 0 || pos_y != 0 || 297 width > rot_x || height > rot_y) { 298 #ifdef VERBOSE 299 dev_dbg(lcdc.fbdev->dev, 300 "invalid plane params plane %d pos_x %d pos_y %d " 301 "w %d h %d\n", plane, pos_x, pos_y, width, height); 302 #endif 303 return -EINVAL; 304 } 305 306 lcdc.frame_offset = offset; 307 lcdc.xres = width; 308 lcdc.yres = height; 309 lcdc.screen_width = screen_width; 310 lcdc.color_mode = color_mode; 311 312 switch (color_mode) { 313 case OMAPFB_COLOR_CLUT_8BPP: 314 lcdc.bpp = 8; 315 lcdc.palette_code = 0x3000; 316 lcdc.palette_size = 512; 317 break; 318 case OMAPFB_COLOR_RGB565: 319 lcdc.bpp = 16; 320 lcdc.palette_code = 0x4000; 321 lcdc.palette_size = 32; 322 break; 323 case OMAPFB_COLOR_RGB444: 324 lcdc.bpp = 16; 325 lcdc.palette_code = 0x4000; 326 lcdc.palette_size = 32; 327 break; 328 case OMAPFB_COLOR_YUV420: 329 if (lcdc.ext_mode) { 330 lcdc.bpp = 12; 331 break; 332 } 333 fallthrough; 334 case OMAPFB_COLOR_YUV422: 335 if (lcdc.ext_mode) { 336 lcdc.bpp = 16; 337 break; 338 } 339 fallthrough; 340 default: 341 /* FIXME: other BPPs. 342 * bpp1: code 0, size 256 343 * bpp2: code 0x1000 size 256 344 * bpp4: code 0x2000 size 256 345 * bpp12: code 0x4000 size 32 346 */ 347 dev_dbg(lcdc.fbdev->dev, "invalid color mode %d\n", color_mode); 348 BUG(); 349 return -1; 350 } 351 352 if (lcdc.ext_mode) { 353 setup_lcd_dma(); 354 return 0; 355 } 356 357 if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { 358 disable_controller(); 359 omap_stop_lcd_dma(); 360 setup_lcd_dma(); 361 enable_controller(); 362 } 363 364 return 0; 365 } 366 367 static int omap_lcdc_enable_plane(int plane, int enable) 368 { 369 dev_dbg(lcdc.fbdev->dev, 370 "plane %d enable %d update_mode %d ext_mode %d\n", 371 plane, enable, lcdc.update_mode, lcdc.ext_mode); 372 if (plane != OMAPFB_PLANE_GFX) 373 return -EINVAL; 374 375 return 0; 376 } 377 378 /* 379 * Configure the LCD DMA for a palette load operation and do the palette 380 * downloading synchronously. We don't use the frame+palette load mode of 381 * the controller, since the palette can always be downloaded separately. 382 */ 383 static void load_palette(void) 384 { 385 u16 *palette; 386 387 palette = (u16 *)lcdc.palette_virt; 388 389 *(u16 *)palette &= 0x0fff; 390 *(u16 *)palette |= lcdc.palette_code; 391 392 omap_set_lcd_dma_b1(lcdc.palette_phys, 393 lcdc.palette_size / 4 + 1, 1, OMAP_DMA_DATA_TYPE_S32); 394 395 omap_set_lcd_dma_single_transfer(1); 396 omap_setup_lcd_dma(); 397 398 init_completion(&lcdc.palette_load_complete); 399 enable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); 400 set_load_mode(OMAP_LCDC_LOAD_PALETTE); 401 enable_controller(); 402 if (!wait_for_completion_timeout(&lcdc.palette_load_complete, 403 msecs_to_jiffies(500))) 404 dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); 405 /* The controller gets disabled in the irq handler */ 406 disable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); 407 omap_stop_lcd_dma(); 408 409 omap_set_lcd_dma_single_transfer(lcdc.ext_mode); 410 } 411 412 /* Used only in internal controller mode */ 413 static int omap_lcdc_setcolreg(u_int regno, u16 red, u16 green, u16 blue, 414 u16 transp, int update_hw_pal) 415 { 416 u16 *palette; 417 418 if (lcdc.color_mode != OMAPFB_COLOR_CLUT_8BPP || regno > 255) 419 return -EINVAL; 420 421 palette = (u16 *)lcdc.palette_virt; 422 423 palette[regno] &= ~0x0fff; 424 palette[regno] |= ((red >> 12) << 8) | ((green >> 12) << 4 ) | 425 (blue >> 12); 426 427 if (update_hw_pal) { 428 disable_controller(); 429 omap_stop_lcd_dma(); 430 load_palette(); 431 setup_lcd_dma(); 432 set_load_mode(OMAP_LCDC_LOAD_FRAME); 433 enable_controller(); 434 } 435 436 return 0; 437 } 438 439 static void calc_ck_div(int is_tft, int pck, int *pck_div) 440 { 441 unsigned long lck; 442 443 pck = max(1, pck); 444 lck = clk_get_rate(lcdc.lcd_ck); 445 *pck_div = (lck + pck - 1) / pck; 446 if (is_tft) 447 *pck_div = max(2, *pck_div); 448 else 449 *pck_div = max(3, *pck_div); 450 if (*pck_div > 255) { 451 /* FIXME: try to adjust logic clock divider as well */ 452 *pck_div = 255; 453 dev_warn(lcdc.fbdev->dev, "pixclock %d kHz too low.\n", 454 pck / 1000); 455 } 456 } 457 458 static inline void setup_regs(void) 459 { 460 u32 l; 461 struct lcd_panel *panel = lcdc.fbdev->panel; 462 int is_tft = panel->config & OMAP_LCDC_PANEL_TFT; 463 unsigned long lck; 464 int pcd; 465 466 l = omap_readl(OMAP_LCDC_CONTROL); 467 l &= ~OMAP_LCDC_CTRL_LCD_TFT; 468 l |= is_tft ? OMAP_LCDC_CTRL_LCD_TFT : 0; 469 #ifdef CONFIG_MACH_OMAP_PALMTE 470 /* FIXME:if (machine_is_omap_palmte()) { */ 471 /* PalmTE uses alternate TFT setting in 8BPP mode */ 472 l |= (is_tft && panel->bpp == 8) ? 0x810000 : 0; 473 /* } */ 474 #endif 475 omap_writel(l, OMAP_LCDC_CONTROL); 476 477 l = omap_readl(OMAP_LCDC_TIMING2); 478 l &= ~(((1 << 6) - 1) << 20); 479 l |= (panel->config & OMAP_LCDC_SIGNAL_MASK) << 20; 480 omap_writel(l, OMAP_LCDC_TIMING2); 481 482 l = panel->x_res - 1; 483 l |= (panel->hsw - 1) << 10; 484 l |= (panel->hfp - 1) << 16; 485 l |= (panel->hbp - 1) << 24; 486 omap_writel(l, OMAP_LCDC_TIMING0); 487 488 l = panel->y_res - 1; 489 l |= (panel->vsw - 1) << 10; 490 l |= panel->vfp << 16; 491 l |= panel->vbp << 24; 492 omap_writel(l, OMAP_LCDC_TIMING1); 493 494 l = omap_readl(OMAP_LCDC_TIMING2); 495 l &= ~0xff; 496 497 lck = clk_get_rate(lcdc.lcd_ck); 498 499 if (!panel->pcd) 500 calc_ck_div(is_tft, panel->pixel_clock * 1000, &pcd); 501 else { 502 dev_warn(lcdc.fbdev->dev, 503 "Pixel clock divider value is obsolete.\n" 504 "Try to set pixel_clock to %lu and pcd to 0 " 505 "in drivers/video/omap/lcd_%s.c and submit a patch.\n", 506 lck / panel->pcd / 1000, panel->name); 507 508 pcd = panel->pcd; 509 } 510 l |= pcd & 0xff; 511 l |= panel->acb << 8; 512 omap_writel(l, OMAP_LCDC_TIMING2); 513 514 /* update panel info with the exact clock */ 515 panel->pixel_clock = lck / pcd / 1000; 516 } 517 518 /* 519 * Configure the LCD controller, download the color palette and start a looped 520 * DMA transfer of the frame image data. Called only in internal 521 * controller mode. 522 */ 523 static int omap_lcdc_set_update_mode(enum omapfb_update_mode mode) 524 { 525 int r = 0; 526 527 if (mode != lcdc.update_mode) { 528 switch (mode) { 529 case OMAPFB_AUTO_UPDATE: 530 setup_regs(); 531 load_palette(); 532 533 /* Setup and start LCD DMA */ 534 setup_lcd_dma(); 535 536 set_load_mode(OMAP_LCDC_LOAD_FRAME); 537 enable_irqs(OMAP_LCDC_IRQ_DONE); 538 /* This will start the actual DMA transfer */ 539 enable_controller(); 540 lcdc.update_mode = mode; 541 break; 542 case OMAPFB_UPDATE_DISABLED: 543 disable_controller(); 544 omap_stop_lcd_dma(); 545 lcdc.update_mode = mode; 546 break; 547 default: 548 r = -EINVAL; 549 } 550 } 551 552 return r; 553 } 554 555 static enum omapfb_update_mode omap_lcdc_get_update_mode(void) 556 { 557 return lcdc.update_mode; 558 } 559 560 /* PM code called only in internal controller mode */ 561 static void omap_lcdc_suspend(void) 562 { 563 omap_lcdc_set_update_mode(OMAPFB_UPDATE_DISABLED); 564 } 565 566 static void omap_lcdc_resume(void) 567 { 568 omap_lcdc_set_update_mode(OMAPFB_AUTO_UPDATE); 569 } 570 571 static void omap_lcdc_get_caps(int plane, struct omapfb_caps *caps) 572 { 573 return; 574 } 575 576 int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data) 577 { 578 BUG_ON(callback == NULL); 579 580 if (lcdc.dma_callback) 581 return -EBUSY; 582 else { 583 lcdc.dma_callback = callback; 584 lcdc.dma_callback_data = data; 585 } 586 return 0; 587 } 588 EXPORT_SYMBOL(omap_lcdc_set_dma_callback); 589 590 void omap_lcdc_free_dma_callback(void) 591 { 592 lcdc.dma_callback = NULL; 593 } 594 EXPORT_SYMBOL(omap_lcdc_free_dma_callback); 595 596 static void lcdc_dma_handler(u16 status, void *data) 597 { 598 if (lcdc.dma_callback) 599 lcdc.dma_callback(lcdc.dma_callback_data); 600 } 601 602 static int alloc_palette_ram(void) 603 { 604 lcdc.palette_virt = dma_alloc_wc(lcdc.fbdev->dev, MAX_PALETTE_SIZE, 605 &lcdc.palette_phys, GFP_KERNEL); 606 if (lcdc.palette_virt == NULL) { 607 dev_err(lcdc.fbdev->dev, "failed to alloc palette memory\n"); 608 return -ENOMEM; 609 } 610 memset(lcdc.palette_virt, 0, MAX_PALETTE_SIZE); 611 612 return 0; 613 } 614 615 static void free_palette_ram(void) 616 { 617 dma_free_wc(lcdc.fbdev->dev, MAX_PALETTE_SIZE, lcdc.palette_virt, 618 lcdc.palette_phys); 619 } 620 621 static int alloc_fbmem(struct omapfb_mem_region *region) 622 { 623 int bpp; 624 int frame_size; 625 struct lcd_panel *panel = lcdc.fbdev->panel; 626 627 bpp = panel->bpp; 628 if (bpp == 12) 629 bpp = 16; 630 frame_size = PAGE_ALIGN(panel->x_res * bpp / 8 * panel->y_res); 631 if (region->size > frame_size) 632 frame_size = region->size; 633 lcdc.vram_size = frame_size; 634 lcdc.vram_virt = dma_alloc_wc(lcdc.fbdev->dev, lcdc.vram_size, 635 &lcdc.vram_phys, GFP_KERNEL); 636 if (lcdc.vram_virt == NULL) { 637 dev_err(lcdc.fbdev->dev, "unable to allocate FB DMA memory\n"); 638 return -ENOMEM; 639 } 640 region->size = frame_size; 641 region->paddr = lcdc.vram_phys; 642 region->vaddr = lcdc.vram_virt; 643 region->alloc = 1; 644 645 memset(lcdc.vram_virt, 0, lcdc.vram_size); 646 647 return 0; 648 } 649 650 static void free_fbmem(void) 651 { 652 dma_free_wc(lcdc.fbdev->dev, lcdc.vram_size, lcdc.vram_virt, 653 lcdc.vram_phys); 654 } 655 656 static int setup_fbmem(struct omapfb_mem_desc *req_md) 657 { 658 if (!req_md->region_cnt) { 659 dev_err(lcdc.fbdev->dev, "no memory regions defined\n"); 660 return -EINVAL; 661 } 662 663 if (req_md->region_cnt > 1) { 664 dev_err(lcdc.fbdev->dev, "only one plane is supported\n"); 665 req_md->region_cnt = 1; 666 } 667 668 return alloc_fbmem(&req_md->region[0]); 669 } 670 671 static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode, 672 struct omapfb_mem_desc *req_vram) 673 { 674 int r; 675 u32 l; 676 int rate; 677 struct clk *tc_ck; 678 679 lcdc.irq_mask = 0; 680 681 lcdc.fbdev = fbdev; 682 lcdc.ext_mode = ext_mode; 683 684 l = 0; 685 omap_writel(l, OMAP_LCDC_CONTROL); 686 687 /* FIXME: 688 * According to errata some platforms have a clock rate limitiation 689 */ 690 lcdc.lcd_ck = clk_get(fbdev->dev, "lcd_ck"); 691 if (IS_ERR(lcdc.lcd_ck)) { 692 dev_err(fbdev->dev, "unable to access LCD clock\n"); 693 r = PTR_ERR(lcdc.lcd_ck); 694 goto fail0; 695 } 696 697 tc_ck = clk_get(fbdev->dev, "tc_ck"); 698 if (IS_ERR(tc_ck)) { 699 dev_err(fbdev->dev, "unable to access TC clock\n"); 700 r = PTR_ERR(tc_ck); 701 goto fail1; 702 } 703 704 rate = clk_get_rate(tc_ck); 705 clk_put(tc_ck); 706 707 if (machine_is_ams_delta()) 708 rate /= 4; 709 if (machine_is_omap_h3()) 710 rate /= 3; 711 r = clk_set_rate(lcdc.lcd_ck, rate); 712 if (r) { 713 dev_err(fbdev->dev, "failed to adjust LCD rate\n"); 714 goto fail1; 715 } 716 clk_prepare_enable(lcdc.lcd_ck); 717 718 r = request_irq(fbdev->int_irq, lcdc_irq_handler, 0, MODULE_NAME, fbdev); 719 if (r) { 720 dev_err(fbdev->dev, "unable to get IRQ\n"); 721 goto fail2; 722 } 723 724 r = omap_request_lcd_dma(lcdc_dma_handler, NULL); 725 if (r) { 726 dev_err(fbdev->dev, "unable to get LCD DMA\n"); 727 goto fail3; 728 } 729 730 omap_set_lcd_dma_single_transfer(ext_mode); 731 omap_set_lcd_dma_ext_controller(ext_mode); 732 733 if (!ext_mode) 734 if ((r = alloc_palette_ram()) < 0) 735 goto fail4; 736 737 if ((r = setup_fbmem(req_vram)) < 0) 738 goto fail5; 739 740 pr_info("omapfb: LCDC initialized\n"); 741 742 return 0; 743 fail5: 744 if (!ext_mode) 745 free_palette_ram(); 746 fail4: 747 omap_free_lcd_dma(); 748 fail3: 749 free_irq(fbdev->int_irq, lcdc.fbdev); 750 fail2: 751 clk_disable_unprepare(lcdc.lcd_ck); 752 fail1: 753 clk_put(lcdc.lcd_ck); 754 fail0: 755 return r; 756 } 757 758 static void omap_lcdc_cleanup(void) 759 { 760 if (!lcdc.ext_mode) 761 free_palette_ram(); 762 free_fbmem(); 763 omap_free_lcd_dma(); 764 free_irq(lcdc.fbdev->int_irq, lcdc.fbdev); 765 clk_disable_unprepare(lcdc.lcd_ck); 766 clk_put(lcdc.lcd_ck); 767 } 768 769 const struct lcd_ctrl omap1_int_ctrl = { 770 .name = "internal", 771 .init = omap_lcdc_init, 772 .cleanup = omap_lcdc_cleanup, 773 .get_caps = omap_lcdc_get_caps, 774 .set_update_mode = omap_lcdc_set_update_mode, 775 .get_update_mode = omap_lcdc_get_update_mode, 776 .update_window = NULL, 777 .suspend = omap_lcdc_suspend, 778 .resume = omap_lcdc_resume, 779 .setup_plane = omap_lcdc_setup_plane, 780 .enable_plane = omap_lcdc_enable_plane, 781 .setcolreg = omap_lcdc_setcolreg, 782 }; 783