1 /* 2 * SuperH Mobile LCDC Framebuffer 3 * 4 * Copyright (c) 2008 Magnus Damm 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 11 #include <linux/atomic.h> 12 #include <linux/backlight.h> 13 #include <linux/clk.h> 14 #include <linux/console.h> 15 #include <linux/ctype.h> 16 #include <linux/dma-mapping.h> 17 #include <linux/delay.h> 18 #include <linux/fbcon.h> 19 #include <linux/gpio.h> 20 #include <linux/init.h> 21 #include <linux/interrupt.h> 22 #include <linux/ioctl.h> 23 #include <linux/kernel.h> 24 #include <linux/mm.h> 25 #include <linux/module.h> 26 #include <linux/platform_device.h> 27 #include <linux/pm_runtime.h> 28 #include <linux/slab.h> 29 #include <linux/videodev2.h> 30 #include <linux/vmalloc.h> 31 32 #include <video/sh_mobile_lcdc.h> 33 34 #include "sh_mobile_lcdcfb.h" 35 36 /* ---------------------------------------------------------------------------- 37 * Overlay register definitions 38 */ 39 40 #define LDBCR 0xb00 41 #define LDBCR_UPC(n) (1 << ((n) + 16)) 42 #define LDBCR_UPF(n) (1 << ((n) + 8)) 43 #define LDBCR_UPD(n) (1 << ((n) + 0)) 44 #define LDBnBSIFR(n) (0xb20 + (n) * 0x20 + 0x00) 45 #define LDBBSIFR_EN (1 << 31) 46 #define LDBBSIFR_VS (1 << 29) 47 #define LDBBSIFR_BRSEL (1 << 28) 48 #define LDBBSIFR_MX (1 << 27) 49 #define LDBBSIFR_MY (1 << 26) 50 #define LDBBSIFR_CV3 (3 << 24) 51 #define LDBBSIFR_CV2 (2 << 24) 52 #define LDBBSIFR_CV1 (1 << 24) 53 #define LDBBSIFR_CV0 (0 << 24) 54 #define LDBBSIFR_CV_MASK (3 << 24) 55 #define LDBBSIFR_LAY_MASK (0xff << 16) 56 #define LDBBSIFR_LAY_SHIFT 16 57 #define LDBBSIFR_ROP3_MASK (0xff << 16) 58 #define LDBBSIFR_ROP3_SHIFT 16 59 #define LDBBSIFR_AL_PL8 (3 << 14) 60 #define LDBBSIFR_AL_PL1 (2 << 14) 61 #define LDBBSIFR_AL_PK (1 << 14) 62 #define LDBBSIFR_AL_1 (0 << 14) 63 #define LDBBSIFR_AL_MASK (3 << 14) 64 #define LDBBSIFR_SWPL (1 << 10) 65 #define LDBBSIFR_SWPW (1 << 9) 66 #define LDBBSIFR_SWPB (1 << 8) 67 #define LDBBSIFR_RY (1 << 7) 68 #define LDBBSIFR_CHRR_420 (2 << 0) 69 #define LDBBSIFR_CHRR_422 (1 << 0) 70 #define LDBBSIFR_CHRR_444 (0 << 0) 71 #define LDBBSIFR_RPKF_ARGB32 (0x00 << 0) 72 #define LDBBSIFR_RPKF_RGB16 (0x03 << 0) 73 #define LDBBSIFR_RPKF_RGB24 (0x0b << 0) 74 #define LDBBSIFR_RPKF_MASK (0x1f << 0) 75 #define LDBnBSSZR(n) (0xb20 + (n) * 0x20 + 0x04) 76 #define LDBBSSZR_BVSS_MASK (0xfff << 16) 77 #define LDBBSSZR_BVSS_SHIFT 16 78 #define LDBBSSZR_BHSS_MASK (0xfff << 0) 79 #define LDBBSSZR_BHSS_SHIFT 0 80 #define LDBnBLOCR(n) (0xb20 + (n) * 0x20 + 0x08) 81 #define LDBBLOCR_CVLC_MASK (0xfff << 16) 82 #define LDBBLOCR_CVLC_SHIFT 16 83 #define LDBBLOCR_CHLC_MASK (0xfff << 0) 84 #define LDBBLOCR_CHLC_SHIFT 0 85 #define LDBnBSMWR(n) (0xb20 + (n) * 0x20 + 0x0c) 86 #define LDBBSMWR_BSMWA_MASK (0xffff << 16) 87 #define LDBBSMWR_BSMWA_SHIFT 16 88 #define LDBBSMWR_BSMW_MASK (0xffff << 0) 89 #define LDBBSMWR_BSMW_SHIFT 0 90 #define LDBnBSAYR(n) (0xb20 + (n) * 0x20 + 0x10) 91 #define LDBBSAYR_FG1A_MASK (0xff << 24) 92 #define LDBBSAYR_FG1A_SHIFT 24 93 #define LDBBSAYR_FG1R_MASK (0xff << 16) 94 #define LDBBSAYR_FG1R_SHIFT 16 95 #define LDBBSAYR_FG1G_MASK (0xff << 8) 96 #define LDBBSAYR_FG1G_SHIFT 8 97 #define LDBBSAYR_FG1B_MASK (0xff << 0) 98 #define LDBBSAYR_FG1B_SHIFT 0 99 #define LDBnBSACR(n) (0xb20 + (n) * 0x20 + 0x14) 100 #define LDBBSACR_FG2A_MASK (0xff << 24) 101 #define LDBBSACR_FG2A_SHIFT 24 102 #define LDBBSACR_FG2R_MASK (0xff << 16) 103 #define LDBBSACR_FG2R_SHIFT 16 104 #define LDBBSACR_FG2G_MASK (0xff << 8) 105 #define LDBBSACR_FG2G_SHIFT 8 106 #define LDBBSACR_FG2B_MASK (0xff << 0) 107 #define LDBBSACR_FG2B_SHIFT 0 108 #define LDBnBSAAR(n) (0xb20 + (n) * 0x20 + 0x18) 109 #define LDBBSAAR_AP_MASK (0xff << 24) 110 #define LDBBSAAR_AP_SHIFT 24 111 #define LDBBSAAR_R_MASK (0xff << 16) 112 #define LDBBSAAR_R_SHIFT 16 113 #define LDBBSAAR_GY_MASK (0xff << 8) 114 #define LDBBSAAR_GY_SHIFT 8 115 #define LDBBSAAR_B_MASK (0xff << 0) 116 #define LDBBSAAR_B_SHIFT 0 117 #define LDBnBPPCR(n) (0xb20 + (n) * 0x20 + 0x1c) 118 #define LDBBPPCR_AP_MASK (0xff << 24) 119 #define LDBBPPCR_AP_SHIFT 24 120 #define LDBBPPCR_R_MASK (0xff << 16) 121 #define LDBBPPCR_R_SHIFT 16 122 #define LDBBPPCR_GY_MASK (0xff << 8) 123 #define LDBBPPCR_GY_SHIFT 8 124 #define LDBBPPCR_B_MASK (0xff << 0) 125 #define LDBBPPCR_B_SHIFT 0 126 #define LDBnBBGCL(n) (0xb10 + (n) * 0x04) 127 #define LDBBBGCL_BGA_MASK (0xff << 24) 128 #define LDBBBGCL_BGA_SHIFT 24 129 #define LDBBBGCL_BGR_MASK (0xff << 16) 130 #define LDBBBGCL_BGR_SHIFT 16 131 #define LDBBBGCL_BGG_MASK (0xff << 8) 132 #define LDBBBGCL_BGG_SHIFT 8 133 #define LDBBBGCL_BGB_MASK (0xff << 0) 134 #define LDBBBGCL_BGB_SHIFT 0 135 136 #define SIDE_B_OFFSET 0x1000 137 #define MIRROR_OFFSET 0x2000 138 139 #define MAX_XRES 1920 140 #define MAX_YRES 1080 141 142 enum sh_mobile_lcdc_overlay_mode { 143 LCDC_OVERLAY_BLEND, 144 LCDC_OVERLAY_ROP3, 145 }; 146 147 /* 148 * struct sh_mobile_lcdc_overlay - LCDC display overlay 149 * 150 * @channel: LCDC channel this overlay belongs to 151 * @cfg: Overlay configuration 152 * @info: Frame buffer device 153 * @index: Overlay index (0-3) 154 * @base: Overlay registers base address 155 * @enabled: True if the overlay is enabled 156 * @mode: Overlay blending mode (alpha blend or ROP3) 157 * @alpha: Global alpha blending value (0-255, for alpha blending mode) 158 * @rop3: Raster operation (for ROP3 mode) 159 * @fb_mem: Frame buffer virtual memory address 160 * @fb_size: Frame buffer size in bytes 161 * @dma_handle: Frame buffer DMA address 162 * @base_addr_y: Overlay base address (RGB or luma component) 163 * @base_addr_c: Overlay base address (chroma component) 164 * @pan_y_offset: Panning linear offset in bytes (luma component) 165 * @format: Current pixelf format 166 * @xres: Horizontal visible resolution 167 * @xres_virtual: Horizontal total resolution 168 * @yres: Vertical visible resolution 169 * @yres_virtual: Vertical total resolution 170 * @pitch: Overlay line pitch 171 * @pos_x: Horizontal overlay position 172 * @pos_y: Vertical overlay position 173 */ 174 struct sh_mobile_lcdc_overlay { 175 struct sh_mobile_lcdc_chan *channel; 176 177 const struct sh_mobile_lcdc_overlay_cfg *cfg; 178 struct fb_info *info; 179 180 unsigned int index; 181 unsigned long base; 182 183 bool enabled; 184 enum sh_mobile_lcdc_overlay_mode mode; 185 unsigned int alpha; 186 unsigned int rop3; 187 188 void *fb_mem; 189 unsigned long fb_size; 190 191 dma_addr_t dma_handle; 192 unsigned long base_addr_y; 193 unsigned long base_addr_c; 194 unsigned long pan_y_offset; 195 196 const struct sh_mobile_lcdc_format_info *format; 197 unsigned int xres; 198 unsigned int xres_virtual; 199 unsigned int yres; 200 unsigned int yres_virtual; 201 unsigned int pitch; 202 int pos_x; 203 int pos_y; 204 }; 205 206 struct sh_mobile_lcdc_priv { 207 void __iomem *base; 208 int irq; 209 atomic_t hw_usecnt; 210 struct device *dev; 211 struct clk *dot_clk; 212 unsigned long lddckr; 213 214 struct sh_mobile_lcdc_chan ch[2]; 215 struct sh_mobile_lcdc_overlay overlays[4]; 216 217 int started; 218 int forced_fourcc; /* 2 channel LCDC must share fourcc setting */ 219 }; 220 221 /* ----------------------------------------------------------------------------- 222 * Registers access 223 */ 224 225 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = { 226 [LDDCKPAT1R] = 0x400, 227 [LDDCKPAT2R] = 0x404, 228 [LDMT1R] = 0x418, 229 [LDMT2R] = 0x41c, 230 [LDMT3R] = 0x420, 231 [LDDFR] = 0x424, 232 [LDSM1R] = 0x428, 233 [LDSM2R] = 0x42c, 234 [LDSA1R] = 0x430, 235 [LDSA2R] = 0x434, 236 [LDMLSR] = 0x438, 237 [LDHCNR] = 0x448, 238 [LDHSYNR] = 0x44c, 239 [LDVLNR] = 0x450, 240 [LDVSYNR] = 0x454, 241 [LDPMR] = 0x460, 242 [LDHAJR] = 0x4a0, 243 }; 244 245 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = { 246 [LDDCKPAT1R] = 0x408, 247 [LDDCKPAT2R] = 0x40c, 248 [LDMT1R] = 0x600, 249 [LDMT2R] = 0x604, 250 [LDMT3R] = 0x608, 251 [LDDFR] = 0x60c, 252 [LDSM1R] = 0x610, 253 [LDSM2R] = 0x614, 254 [LDSA1R] = 0x618, 255 [LDMLSR] = 0x620, 256 [LDHCNR] = 0x624, 257 [LDHSYNR] = 0x628, 258 [LDVLNR] = 0x62c, 259 [LDVSYNR] = 0x630, 260 [LDPMR] = 0x63c, 261 }; 262 263 static bool banked(int reg_nr) 264 { 265 switch (reg_nr) { 266 case LDMT1R: 267 case LDMT2R: 268 case LDMT3R: 269 case LDDFR: 270 case LDSM1R: 271 case LDSA1R: 272 case LDSA2R: 273 case LDMLSR: 274 case LDHCNR: 275 case LDHSYNR: 276 case LDVLNR: 277 case LDVSYNR: 278 return true; 279 } 280 return false; 281 } 282 283 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan) 284 { 285 return chan->cfg->chan == LCDC_CHAN_SUBLCD; 286 } 287 288 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan, 289 int reg_nr, unsigned long data) 290 { 291 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]); 292 if (banked(reg_nr)) 293 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] + 294 SIDE_B_OFFSET); 295 } 296 297 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan, 298 int reg_nr, unsigned long data) 299 { 300 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] + 301 MIRROR_OFFSET); 302 } 303 304 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan, 305 int reg_nr) 306 { 307 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]); 308 } 309 310 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl, 311 int reg, unsigned long data) 312 { 313 iowrite32(data, ovl->channel->lcdc->base + reg); 314 iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET); 315 } 316 317 static void lcdc_write(struct sh_mobile_lcdc_priv *priv, 318 unsigned long reg_offs, unsigned long data) 319 { 320 iowrite32(data, priv->base + reg_offs); 321 } 322 323 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv, 324 unsigned long reg_offs) 325 { 326 return ioread32(priv->base + reg_offs); 327 } 328 329 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv, 330 unsigned long reg_offs, 331 unsigned long mask, unsigned long until) 332 { 333 while ((lcdc_read(priv, reg_offs) & mask) != until) 334 cpu_relax(); 335 } 336 337 /* ----------------------------------------------------------------------------- 338 * Clock management 339 */ 340 341 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) 342 { 343 if (atomic_inc_and_test(&priv->hw_usecnt)) { 344 if (priv->dot_clk) 345 clk_prepare_enable(priv->dot_clk); 346 pm_runtime_get_sync(priv->dev); 347 } 348 } 349 350 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv) 351 { 352 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) { 353 pm_runtime_put(priv->dev); 354 if (priv->dot_clk) 355 clk_disable_unprepare(priv->dot_clk); 356 } 357 } 358 359 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv, 360 int clock_source) 361 { 362 struct clk *clk; 363 char *str; 364 365 switch (clock_source) { 366 case LCDC_CLK_BUS: 367 str = "bus_clk"; 368 priv->lddckr = LDDCKR_ICKSEL_BUS; 369 break; 370 case LCDC_CLK_PERIPHERAL: 371 str = "peripheral_clk"; 372 priv->lddckr = LDDCKR_ICKSEL_MIPI; 373 break; 374 case LCDC_CLK_EXTERNAL: 375 str = NULL; 376 priv->lddckr = LDDCKR_ICKSEL_HDMI; 377 break; 378 default: 379 return -EINVAL; 380 } 381 382 if (str == NULL) 383 return 0; 384 385 clk = clk_get(priv->dev, str); 386 if (IS_ERR(clk)) { 387 dev_err(priv->dev, "cannot get dot clock %s\n", str); 388 return PTR_ERR(clk); 389 } 390 391 priv->dot_clk = clk; 392 return 0; 393 } 394 395 /* ----------------------------------------------------------------------------- 396 * Display, panel and deferred I/O 397 */ 398 399 static void lcdc_sys_write_index(void *handle, unsigned long data) 400 { 401 struct sh_mobile_lcdc_chan *ch = handle; 402 403 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT); 404 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); 405 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA | 406 (lcdc_chan_is_sublcd(ch) ? 2 : 0)); 407 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); 408 } 409 410 static void lcdc_sys_write_data(void *handle, unsigned long data) 411 { 412 struct sh_mobile_lcdc_chan *ch = handle; 413 414 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW); 415 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); 416 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA | 417 (lcdc_chan_is_sublcd(ch) ? 2 : 0)); 418 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); 419 } 420 421 static unsigned long lcdc_sys_read_data(void *handle) 422 { 423 struct sh_mobile_lcdc_chan *ch = handle; 424 425 lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR); 426 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); 427 lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA | 428 (lcdc_chan_is_sublcd(ch) ? 2 : 0)); 429 udelay(1); 430 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); 431 432 return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK; 433 } 434 435 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = { 436 .write_index = lcdc_sys_write_index, 437 .write_data = lcdc_sys_write_data, 438 .read_data = lcdc_sys_read_data, 439 }; 440 441 static int sh_mobile_lcdc_sginit(struct fb_info *info, 442 struct list_head *pagelist) 443 { 444 struct sh_mobile_lcdc_chan *ch = info->par; 445 unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT; 446 struct page *page; 447 int nr_pages = 0; 448 449 sg_init_table(ch->sglist, nr_pages_max); 450 451 list_for_each_entry(page, pagelist, lru) 452 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0); 453 454 return nr_pages; 455 } 456 457 static void sh_mobile_lcdc_deferred_io(struct fb_info *info, 458 struct list_head *pagelist) 459 { 460 struct sh_mobile_lcdc_chan *ch = info->par; 461 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg; 462 463 /* enable clocks before accessing hardware */ 464 sh_mobile_lcdc_clk_on(ch->lcdc); 465 466 /* 467 * It's possible to get here without anything on the pagelist via 468 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync() 469 * invocation. In the former case, the acceleration routines are 470 * stepped in to when using the framebuffer console causing the 471 * workqueue to be scheduled without any dirty pages on the list. 472 * 473 * Despite this, a panel update is still needed given that the 474 * acceleration routines have their own methods for writing in 475 * that still need to be updated. 476 * 477 * The fsync() and empty pagelist case could be optimized for, 478 * but we don't bother, as any application exhibiting such 479 * behaviour is fundamentally broken anyways. 480 */ 481 if (!list_empty(pagelist)) { 482 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist); 483 484 /* trigger panel update */ 485 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE); 486 if (panel->start_transfer) 487 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops); 488 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG); 489 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages, 490 DMA_TO_DEVICE); 491 } else { 492 if (panel->start_transfer) 493 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops); 494 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG); 495 } 496 } 497 498 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info) 499 { 500 struct fb_deferred_io *fbdefio = info->fbdefio; 501 502 if (fbdefio) 503 schedule_delayed_work(&info->deferred_work, fbdefio->delay); 504 } 505 506 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch) 507 { 508 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg; 509 510 if (ch->tx_dev) { 511 int ret; 512 513 ret = ch->tx_dev->ops->display_on(ch->tx_dev); 514 if (ret < 0) 515 return; 516 517 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED) 518 ch->info->state = FBINFO_STATE_SUSPENDED; 519 } 520 521 /* HDMI must be enabled before LCDC configuration */ 522 if (panel->display_on) 523 panel->display_on(); 524 } 525 526 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch) 527 { 528 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg; 529 530 if (panel->display_off) 531 panel->display_off(); 532 533 if (ch->tx_dev) 534 ch->tx_dev->ops->display_off(ch->tx_dev); 535 } 536 537 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var, 538 struct fb_info *info); 539 540 /* ----------------------------------------------------------------------------- 541 * Format helpers 542 */ 543 544 struct sh_mobile_lcdc_format_info { 545 u32 fourcc; 546 unsigned int bpp; 547 bool yuv; 548 u32 lddfr; 549 }; 550 551 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = { 552 { 553 .fourcc = V4L2_PIX_FMT_RGB565, 554 .bpp = 16, 555 .yuv = false, 556 .lddfr = LDDFR_PKF_RGB16, 557 }, { 558 .fourcc = V4L2_PIX_FMT_BGR24, 559 .bpp = 24, 560 .yuv = false, 561 .lddfr = LDDFR_PKF_RGB24, 562 }, { 563 .fourcc = V4L2_PIX_FMT_BGR32, 564 .bpp = 32, 565 .yuv = false, 566 .lddfr = LDDFR_PKF_ARGB32, 567 }, { 568 .fourcc = V4L2_PIX_FMT_NV12, 569 .bpp = 12, 570 .yuv = true, 571 .lddfr = LDDFR_CC | LDDFR_YF_420, 572 }, { 573 .fourcc = V4L2_PIX_FMT_NV21, 574 .bpp = 12, 575 .yuv = true, 576 .lddfr = LDDFR_CC | LDDFR_YF_420, 577 }, { 578 .fourcc = V4L2_PIX_FMT_NV16, 579 .bpp = 16, 580 .yuv = true, 581 .lddfr = LDDFR_CC | LDDFR_YF_422, 582 }, { 583 .fourcc = V4L2_PIX_FMT_NV61, 584 .bpp = 16, 585 .yuv = true, 586 .lddfr = LDDFR_CC | LDDFR_YF_422, 587 }, { 588 .fourcc = V4L2_PIX_FMT_NV24, 589 .bpp = 24, 590 .yuv = true, 591 .lddfr = LDDFR_CC | LDDFR_YF_444, 592 }, { 593 .fourcc = V4L2_PIX_FMT_NV42, 594 .bpp = 24, 595 .yuv = true, 596 .lddfr = LDDFR_CC | LDDFR_YF_444, 597 }, 598 }; 599 600 static const struct sh_mobile_lcdc_format_info * 601 sh_mobile_format_info(u32 fourcc) 602 { 603 unsigned int i; 604 605 for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) { 606 if (sh_mobile_format_infos[i].fourcc == fourcc) 607 return &sh_mobile_format_infos[i]; 608 } 609 610 return NULL; 611 } 612 613 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var) 614 { 615 if (var->grayscale > 1) 616 return var->grayscale; 617 618 switch (var->bits_per_pixel) { 619 case 16: 620 return V4L2_PIX_FMT_RGB565; 621 case 24: 622 return V4L2_PIX_FMT_BGR24; 623 case 32: 624 return V4L2_PIX_FMT_BGR32; 625 default: 626 return 0; 627 } 628 } 629 630 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var) 631 { 632 return var->grayscale > 1; 633 } 634 635 /* ----------------------------------------------------------------------------- 636 * Start, stop and IRQ 637 */ 638 639 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data) 640 { 641 struct sh_mobile_lcdc_priv *priv = data; 642 struct sh_mobile_lcdc_chan *ch; 643 unsigned long ldintr; 644 int is_sub; 645 int k; 646 647 /* Acknowledge interrupts and disable further VSYNC End IRQs. */ 648 ldintr = lcdc_read(priv, _LDINTR); 649 lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE); 650 651 /* figure out if this interrupt is for main or sub lcd */ 652 is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0; 653 654 /* wake up channel and disable clocks */ 655 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 656 ch = &priv->ch[k]; 657 658 if (!ch->enabled) 659 continue; 660 661 /* Frame End */ 662 if (ldintr & LDINTR_FS) { 663 if (is_sub == lcdc_chan_is_sublcd(ch)) { 664 ch->frame_end = 1; 665 wake_up(&ch->frame_end_wait); 666 667 sh_mobile_lcdc_clk_off(priv); 668 } 669 } 670 671 /* VSYNC End */ 672 if (ldintr & LDINTR_VES) 673 complete(&ch->vsync_completion); 674 } 675 676 return IRQ_HANDLED; 677 } 678 679 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch) 680 { 681 unsigned long ldintr; 682 int ret; 683 684 /* Enable VSync End interrupt and be careful not to acknowledge any 685 * pending interrupt. 686 */ 687 ldintr = lcdc_read(ch->lcdc, _LDINTR); 688 ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK; 689 lcdc_write(ch->lcdc, _LDINTR, ldintr); 690 691 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion, 692 msecs_to_jiffies(100)); 693 if (!ret) 694 return -ETIMEDOUT; 695 696 return 0; 697 } 698 699 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv, 700 int start) 701 { 702 unsigned long tmp = lcdc_read(priv, _LDCNT2R); 703 int k; 704 705 /* start or stop the lcdc */ 706 if (start) 707 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO); 708 else 709 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO); 710 711 /* wait until power is applied/stopped on all channels */ 712 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) 713 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled) 714 while (1) { 715 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) 716 & LDPMR_LPS; 717 if (start && tmp == LDPMR_LPS) 718 break; 719 if (!start && tmp == 0) 720 break; 721 cpu_relax(); 722 } 723 724 if (!start) 725 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */ 726 } 727 728 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch) 729 { 730 const struct fb_var_screeninfo *var = &ch->info->var; 731 const struct fb_videomode *mode = &ch->display.mode; 732 unsigned long h_total, hsync_pos, display_h_total; 733 u32 tmp; 734 735 tmp = ch->ldmt1r_value; 736 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL; 737 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL; 738 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0; 739 tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0; 740 tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0; 741 tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0; 742 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0; 743 lcdc_write_chan(ch, LDMT1R, tmp); 744 745 /* setup SYS bus */ 746 lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r); 747 lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r); 748 749 /* horizontal configuration */ 750 h_total = mode->xres + mode->hsync_len + mode->left_margin 751 + mode->right_margin; 752 tmp = h_total / 8; /* HTCN */ 753 tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */ 754 lcdc_write_chan(ch, LDHCNR, tmp); 755 756 hsync_pos = mode->xres + mode->right_margin; 757 tmp = hsync_pos / 8; /* HSYNP */ 758 tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */ 759 lcdc_write_chan(ch, LDHSYNR, tmp); 760 761 /* vertical configuration */ 762 tmp = mode->yres + mode->vsync_len + mode->upper_margin 763 + mode->lower_margin; /* VTLN */ 764 tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */ 765 lcdc_write_chan(ch, LDVLNR, tmp); 766 767 tmp = mode->yres + mode->lower_margin; /* VSYNP */ 768 tmp |= mode->vsync_len << 16; /* VSYNW */ 769 lcdc_write_chan(ch, LDVSYNR, tmp); 770 771 /* Adjust horizontal synchronisation for HDMI */ 772 display_h_total = mode->xres + mode->hsync_len + mode->left_margin 773 + mode->right_margin; 774 tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16) 775 | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7); 776 lcdc_write_chan(ch, LDHAJR, tmp); 777 lcdc_write_chan_mirror(ch, LDHAJR, tmp); 778 } 779 780 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl) 781 { 782 u32 format = 0; 783 784 if (!ovl->enabled) { 785 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index)); 786 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0); 787 lcdc_write(ovl->channel->lcdc, LDBCR, 788 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index)); 789 return; 790 } 791 792 ovl->base_addr_y = ovl->dma_handle; 793 ovl->base_addr_c = ovl->dma_handle 794 + ovl->xres_virtual * ovl->yres_virtual; 795 796 switch (ovl->mode) { 797 case LCDC_OVERLAY_BLEND: 798 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT); 799 break; 800 801 case LCDC_OVERLAY_ROP3: 802 format = LDBBSIFR_EN | LDBBSIFR_BRSEL 803 | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT); 804 break; 805 } 806 807 switch (ovl->format->fourcc) { 808 case V4L2_PIX_FMT_RGB565: 809 case V4L2_PIX_FMT_NV21: 810 case V4L2_PIX_FMT_NV61: 811 case V4L2_PIX_FMT_NV42: 812 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW; 813 break; 814 case V4L2_PIX_FMT_BGR24: 815 case V4L2_PIX_FMT_NV12: 816 case V4L2_PIX_FMT_NV16: 817 case V4L2_PIX_FMT_NV24: 818 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB; 819 break; 820 case V4L2_PIX_FMT_BGR32: 821 default: 822 format |= LDBBSIFR_SWPL; 823 break; 824 } 825 826 switch (ovl->format->fourcc) { 827 case V4L2_PIX_FMT_RGB565: 828 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16; 829 break; 830 case V4L2_PIX_FMT_BGR24: 831 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24; 832 break; 833 case V4L2_PIX_FMT_BGR32: 834 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32; 835 break; 836 case V4L2_PIX_FMT_NV12: 837 case V4L2_PIX_FMT_NV21: 838 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420; 839 break; 840 case V4L2_PIX_FMT_NV16: 841 case V4L2_PIX_FMT_NV61: 842 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422; 843 break; 844 case V4L2_PIX_FMT_NV24: 845 case V4L2_PIX_FMT_NV42: 846 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444; 847 break; 848 } 849 850 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index)); 851 852 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format); 853 854 lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index), 855 (ovl->yres << LDBBSSZR_BVSS_SHIFT) | 856 (ovl->xres << LDBBSSZR_BHSS_SHIFT)); 857 lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index), 858 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) | 859 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT)); 860 lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index), 861 ovl->pitch << LDBBSMWR_BSMW_SHIFT); 862 863 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y); 864 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c); 865 866 lcdc_write(ovl->channel->lcdc, LDBCR, 867 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index)); 868 } 869 870 /* 871 * __sh_mobile_lcdc_start - Configure and start the LCDC 872 * @priv: LCDC device 873 * 874 * Configure all enabled channels and start the LCDC device. All external 875 * devices (clocks, MERAM, panels, ...) are not touched by this function. 876 */ 877 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) 878 { 879 struct sh_mobile_lcdc_chan *ch; 880 unsigned long tmp; 881 int k, m; 882 883 /* Enable LCDC channels. Read data from external memory, avoid using the 884 * BEU for now. 885 */ 886 lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled); 887 888 /* Stop the LCDC first and disable all interrupts. */ 889 sh_mobile_lcdc_start_stop(priv, 0); 890 lcdc_write(priv, _LDINTR, 0); 891 892 /* Configure power supply, dot clocks and start them. */ 893 tmp = priv->lddckr; 894 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 895 ch = &priv->ch[k]; 896 if (!ch->enabled) 897 continue; 898 899 /* Power supply */ 900 lcdc_write_chan(ch, LDPMR, 0); 901 902 m = ch->cfg->clock_divider; 903 if (!m) 904 continue; 905 906 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider 907 * denominator. 908 */ 909 lcdc_write_chan(ch, LDDCKPAT1R, 0); 910 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1); 911 912 if (m == 1) 913 m = LDDCKR_MOSEL; 914 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0); 915 } 916 917 lcdc_write(priv, _LDDCKR, tmp); 918 lcdc_write(priv, _LDDCKSTPR, 0); 919 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0); 920 921 /* Setup geometry, format, frame buffer memory and operation mode. */ 922 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 923 ch = &priv->ch[k]; 924 if (!ch->enabled) 925 continue; 926 927 sh_mobile_lcdc_geometry(ch); 928 929 tmp = ch->format->lddfr; 930 931 if (ch->format->yuv) { 932 switch (ch->colorspace) { 933 case V4L2_COLORSPACE_REC709: 934 tmp |= LDDFR_CF1; 935 break; 936 case V4L2_COLORSPACE_JPEG: 937 tmp |= LDDFR_CF0; 938 break; 939 } 940 } 941 942 lcdc_write_chan(ch, LDDFR, tmp); 943 lcdc_write_chan(ch, LDMLSR, ch->line_size); 944 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y); 945 if (ch->format->yuv) 946 lcdc_write_chan(ch, LDSA2R, ch->base_addr_c); 947 948 /* When using deferred I/O mode, configure the LCDC for one-shot 949 * operation and enable the frame end interrupt. Otherwise use 950 * continuous read mode. 951 */ 952 if (ch->ldmt1r_value & LDMT1R_IFM && 953 ch->cfg->sys_bus_cfg.deferred_io_msec) { 954 lcdc_write_chan(ch, LDSM1R, LDSM1R_OS); 955 lcdc_write(priv, _LDINTR, LDINTR_FE); 956 } else { 957 lcdc_write_chan(ch, LDSM1R, 0); 958 } 959 } 960 961 /* Word and long word swap. */ 962 switch (priv->ch[0].format->fourcc) { 963 case V4L2_PIX_FMT_RGB565: 964 case V4L2_PIX_FMT_NV21: 965 case V4L2_PIX_FMT_NV61: 966 case V4L2_PIX_FMT_NV42: 967 tmp = LDDDSR_LS | LDDDSR_WS; 968 break; 969 case V4L2_PIX_FMT_BGR24: 970 case V4L2_PIX_FMT_NV12: 971 case V4L2_PIX_FMT_NV16: 972 case V4L2_PIX_FMT_NV24: 973 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS; 974 break; 975 case V4L2_PIX_FMT_BGR32: 976 default: 977 tmp = LDDDSR_LS; 978 break; 979 } 980 lcdc_write(priv, _LDDDSR, tmp); 981 982 /* Enable the display output. */ 983 lcdc_write(priv, _LDCNT1R, LDCNT1R_DE); 984 sh_mobile_lcdc_start_stop(priv, 1); 985 priv->started = 1; 986 } 987 988 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) 989 { 990 struct sh_mobile_lcdc_chan *ch; 991 unsigned long tmp; 992 int ret; 993 int k; 994 995 /* enable clocks before accessing the hardware */ 996 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 997 if (priv->ch[k].enabled) 998 sh_mobile_lcdc_clk_on(priv); 999 } 1000 1001 /* reset */ 1002 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR); 1003 lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0); 1004 1005 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 1006 const struct sh_mobile_lcdc_panel_cfg *panel; 1007 1008 ch = &priv->ch[k]; 1009 if (!ch->enabled) 1010 continue; 1011 1012 panel = &ch->cfg->panel_cfg; 1013 if (panel->setup_sys) { 1014 ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops); 1015 if (ret) 1016 return ret; 1017 } 1018 } 1019 1020 /* Compute frame buffer base address and pitch for each channel. */ 1021 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 1022 ch = &priv->ch[k]; 1023 if (!ch->enabled) 1024 continue; 1025 1026 ch->base_addr_y = ch->dma_handle; 1027 ch->base_addr_c = ch->dma_handle 1028 + ch->xres_virtual * ch->yres_virtual; 1029 ch->line_size = ch->pitch; 1030 } 1031 1032 for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) { 1033 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k]; 1034 sh_mobile_lcdc_overlay_setup(ovl); 1035 } 1036 1037 /* Start the LCDC. */ 1038 __sh_mobile_lcdc_start(priv); 1039 1040 /* Setup deferred I/O, tell the board code to enable the panels, and 1041 * turn backlight on. 1042 */ 1043 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 1044 ch = &priv->ch[k]; 1045 if (!ch->enabled) 1046 continue; 1047 1048 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec; 1049 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) { 1050 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io; 1051 ch->defio.delay = msecs_to_jiffies(tmp); 1052 ch->info->fbdefio = &ch->defio; 1053 fb_deferred_io_init(ch->info); 1054 } 1055 1056 sh_mobile_lcdc_display_on(ch); 1057 1058 if (ch->bl) { 1059 ch->bl->props.power = FB_BLANK_UNBLANK; 1060 backlight_update_status(ch->bl); 1061 } 1062 } 1063 1064 return 0; 1065 } 1066 1067 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv) 1068 { 1069 struct sh_mobile_lcdc_chan *ch; 1070 int k; 1071 1072 /* clean up deferred io and ask board code to disable panel */ 1073 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 1074 ch = &priv->ch[k]; 1075 if (!ch->enabled) 1076 continue; 1077 1078 /* deferred io mode: 1079 * flush frame, and wait for frame end interrupt 1080 * clean up deferred io and enable clock 1081 */ 1082 if (ch->info && ch->info->fbdefio) { 1083 ch->frame_end = 0; 1084 schedule_delayed_work(&ch->info->deferred_work, 0); 1085 wait_event(ch->frame_end_wait, ch->frame_end); 1086 fb_deferred_io_cleanup(ch->info); 1087 ch->info->fbdefio = NULL; 1088 sh_mobile_lcdc_clk_on(priv); 1089 } 1090 1091 if (ch->bl) { 1092 ch->bl->props.power = FB_BLANK_POWERDOWN; 1093 backlight_update_status(ch->bl); 1094 } 1095 1096 sh_mobile_lcdc_display_off(ch); 1097 } 1098 1099 /* stop the lcdc */ 1100 if (priv->started) { 1101 sh_mobile_lcdc_start_stop(priv, 0); 1102 priv->started = 0; 1103 } 1104 1105 /* stop clocks */ 1106 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) 1107 if (priv->ch[k].enabled) 1108 sh_mobile_lcdc_clk_off(priv); 1109 } 1110 1111 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var, 1112 struct fb_info *info) 1113 { 1114 if (var->xres > MAX_XRES || var->yres > MAX_YRES) 1115 return -EINVAL; 1116 1117 /* Make sure the virtual resolution is at least as big as the visible 1118 * resolution. 1119 */ 1120 if (var->xres_virtual < var->xres) 1121 var->xres_virtual = var->xres; 1122 if (var->yres_virtual < var->yres) 1123 var->yres_virtual = var->yres; 1124 1125 if (sh_mobile_format_is_fourcc(var)) { 1126 const struct sh_mobile_lcdc_format_info *format; 1127 1128 format = sh_mobile_format_info(var->grayscale); 1129 if (format == NULL) 1130 return -EINVAL; 1131 var->bits_per_pixel = format->bpp; 1132 1133 /* Default to RGB and JPEG color-spaces for RGB and YUV formats 1134 * respectively. 1135 */ 1136 if (!format->yuv) 1137 var->colorspace = V4L2_COLORSPACE_SRGB; 1138 else if (var->colorspace != V4L2_COLORSPACE_REC709) 1139 var->colorspace = V4L2_COLORSPACE_JPEG; 1140 } else { 1141 if (var->bits_per_pixel <= 16) { /* RGB 565 */ 1142 var->bits_per_pixel = 16; 1143 var->red.offset = 11; 1144 var->red.length = 5; 1145 var->green.offset = 5; 1146 var->green.length = 6; 1147 var->blue.offset = 0; 1148 var->blue.length = 5; 1149 var->transp.offset = 0; 1150 var->transp.length = 0; 1151 } else if (var->bits_per_pixel <= 24) { /* RGB 888 */ 1152 var->bits_per_pixel = 24; 1153 var->red.offset = 16; 1154 var->red.length = 8; 1155 var->green.offset = 8; 1156 var->green.length = 8; 1157 var->blue.offset = 0; 1158 var->blue.length = 8; 1159 var->transp.offset = 0; 1160 var->transp.length = 0; 1161 } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */ 1162 var->bits_per_pixel = 32; 1163 var->red.offset = 16; 1164 var->red.length = 8; 1165 var->green.offset = 8; 1166 var->green.length = 8; 1167 var->blue.offset = 0; 1168 var->blue.length = 8; 1169 var->transp.offset = 24; 1170 var->transp.length = 8; 1171 } else 1172 return -EINVAL; 1173 1174 var->red.msb_right = 0; 1175 var->green.msb_right = 0; 1176 var->blue.msb_right = 0; 1177 var->transp.msb_right = 0; 1178 } 1179 1180 /* Make sure we don't exceed our allocated memory. */ 1181 if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 > 1182 info->fix.smem_len) 1183 return -EINVAL; 1184 1185 return 0; 1186 } 1187 1188 /* ----------------------------------------------------------------------------- 1189 * Frame buffer operations - Overlays 1190 */ 1191 1192 static ssize_t 1193 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf) 1194 { 1195 struct fb_info *info = dev_get_drvdata(dev); 1196 struct sh_mobile_lcdc_overlay *ovl = info->par; 1197 1198 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha); 1199 } 1200 1201 static ssize_t 1202 overlay_alpha_store(struct device *dev, struct device_attribute *attr, 1203 const char *buf, size_t count) 1204 { 1205 struct fb_info *info = dev_get_drvdata(dev); 1206 struct sh_mobile_lcdc_overlay *ovl = info->par; 1207 unsigned int alpha; 1208 char *endp; 1209 1210 alpha = simple_strtoul(buf, &endp, 10); 1211 if (isspace(*endp)) 1212 endp++; 1213 1214 if (endp - buf != count) 1215 return -EINVAL; 1216 1217 if (alpha > 255) 1218 return -EINVAL; 1219 1220 if (ovl->alpha != alpha) { 1221 ovl->alpha = alpha; 1222 1223 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled) 1224 sh_mobile_lcdc_overlay_setup(ovl); 1225 } 1226 1227 return count; 1228 } 1229 1230 static ssize_t 1231 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf) 1232 { 1233 struct fb_info *info = dev_get_drvdata(dev); 1234 struct sh_mobile_lcdc_overlay *ovl = info->par; 1235 1236 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode); 1237 } 1238 1239 static ssize_t 1240 overlay_mode_store(struct device *dev, struct device_attribute *attr, 1241 const char *buf, size_t count) 1242 { 1243 struct fb_info *info = dev_get_drvdata(dev); 1244 struct sh_mobile_lcdc_overlay *ovl = info->par; 1245 unsigned int mode; 1246 char *endp; 1247 1248 mode = simple_strtoul(buf, &endp, 10); 1249 if (isspace(*endp)) 1250 endp++; 1251 1252 if (endp - buf != count) 1253 return -EINVAL; 1254 1255 if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3) 1256 return -EINVAL; 1257 1258 if (ovl->mode != mode) { 1259 ovl->mode = mode; 1260 1261 if (ovl->enabled) 1262 sh_mobile_lcdc_overlay_setup(ovl); 1263 } 1264 1265 return count; 1266 } 1267 1268 static ssize_t 1269 overlay_position_show(struct device *dev, struct device_attribute *attr, 1270 char *buf) 1271 { 1272 struct fb_info *info = dev_get_drvdata(dev); 1273 struct sh_mobile_lcdc_overlay *ovl = info->par; 1274 1275 return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y); 1276 } 1277 1278 static ssize_t 1279 overlay_position_store(struct device *dev, struct device_attribute *attr, 1280 const char *buf, size_t count) 1281 { 1282 struct fb_info *info = dev_get_drvdata(dev); 1283 struct sh_mobile_lcdc_overlay *ovl = info->par; 1284 char *endp; 1285 int pos_x; 1286 int pos_y; 1287 1288 pos_x = simple_strtol(buf, &endp, 10); 1289 if (*endp != ',') 1290 return -EINVAL; 1291 1292 pos_y = simple_strtol(endp + 1, &endp, 10); 1293 if (isspace(*endp)) 1294 endp++; 1295 1296 if (endp - buf != count) 1297 return -EINVAL; 1298 1299 if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) { 1300 ovl->pos_x = pos_x; 1301 ovl->pos_y = pos_y; 1302 1303 if (ovl->enabled) 1304 sh_mobile_lcdc_overlay_setup(ovl); 1305 } 1306 1307 return count; 1308 } 1309 1310 static ssize_t 1311 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf) 1312 { 1313 struct fb_info *info = dev_get_drvdata(dev); 1314 struct sh_mobile_lcdc_overlay *ovl = info->par; 1315 1316 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3); 1317 } 1318 1319 static ssize_t 1320 overlay_rop3_store(struct device *dev, struct device_attribute *attr, 1321 const char *buf, size_t count) 1322 { 1323 struct fb_info *info = dev_get_drvdata(dev); 1324 struct sh_mobile_lcdc_overlay *ovl = info->par; 1325 unsigned int rop3; 1326 char *endp; 1327 1328 rop3 = simple_strtoul(buf, &endp, 10); 1329 if (isspace(*endp)) 1330 endp++; 1331 1332 if (endp - buf != count) 1333 return -EINVAL; 1334 1335 if (rop3 > 255) 1336 return -EINVAL; 1337 1338 if (ovl->rop3 != rop3) { 1339 ovl->rop3 = rop3; 1340 1341 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled) 1342 sh_mobile_lcdc_overlay_setup(ovl); 1343 } 1344 1345 return count; 1346 } 1347 1348 static const struct device_attribute overlay_sysfs_attrs[] = { 1349 __ATTR(ovl_alpha, S_IRUGO|S_IWUSR, 1350 overlay_alpha_show, overlay_alpha_store), 1351 __ATTR(ovl_mode, S_IRUGO|S_IWUSR, 1352 overlay_mode_show, overlay_mode_store), 1353 __ATTR(ovl_position, S_IRUGO|S_IWUSR, 1354 overlay_position_show, overlay_position_store), 1355 __ATTR(ovl_rop3, S_IRUGO|S_IWUSR, 1356 overlay_rop3_show, overlay_rop3_store), 1357 }; 1358 1359 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix = { 1360 .id = "SH Mobile LCDC", 1361 .type = FB_TYPE_PACKED_PIXELS, 1362 .visual = FB_VISUAL_TRUECOLOR, 1363 .accel = FB_ACCEL_NONE, 1364 .xpanstep = 1, 1365 .ypanstep = 1, 1366 .ywrapstep = 0, 1367 .capabilities = FB_CAP_FOURCC, 1368 }; 1369 1370 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var, 1371 struct fb_info *info) 1372 { 1373 struct sh_mobile_lcdc_overlay *ovl = info->par; 1374 unsigned long base_addr_y; 1375 unsigned long base_addr_c; 1376 unsigned long y_offset; 1377 unsigned long c_offset; 1378 1379 if (!ovl->format->yuv) { 1380 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset) 1381 * ovl->format->bpp / 8; 1382 c_offset = 0; 1383 } else { 1384 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1; 1385 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1; 1386 1387 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset; 1388 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub 1389 + var->xoffset * 2 / xsub; 1390 } 1391 1392 /* If the Y offset hasn't changed, the C offset hasn't either. There's 1393 * nothing to do in that case. 1394 */ 1395 if (y_offset == ovl->pan_y_offset) 1396 return 0; 1397 1398 /* Set the source address for the next refresh */ 1399 base_addr_y = ovl->dma_handle + y_offset; 1400 base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual 1401 + c_offset; 1402 1403 ovl->base_addr_y = base_addr_y; 1404 ovl->base_addr_c = base_addr_c; 1405 ovl->pan_y_offset = y_offset; 1406 1407 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index)); 1408 1409 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y); 1410 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c); 1411 1412 lcdc_write(ovl->channel->lcdc, LDBCR, 1413 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index)); 1414 1415 return 0; 1416 } 1417 1418 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd, 1419 unsigned long arg) 1420 { 1421 struct sh_mobile_lcdc_overlay *ovl = info->par; 1422 1423 switch (cmd) { 1424 case FBIO_WAITFORVSYNC: 1425 return sh_mobile_lcdc_wait_for_vsync(ovl->channel); 1426 1427 default: 1428 return -ENOIOCTLCMD; 1429 } 1430 } 1431 1432 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var, 1433 struct fb_info *info) 1434 { 1435 return __sh_mobile_lcdc_check_var(var, info); 1436 } 1437 1438 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info) 1439 { 1440 struct sh_mobile_lcdc_overlay *ovl = info->par; 1441 1442 ovl->format = 1443 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var)); 1444 1445 ovl->xres = info->var.xres; 1446 ovl->xres_virtual = info->var.xres_virtual; 1447 ovl->yres = info->var.yres; 1448 ovl->yres_virtual = info->var.yres_virtual; 1449 1450 if (ovl->format->yuv) 1451 ovl->pitch = info->var.xres_virtual; 1452 else 1453 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8; 1454 1455 sh_mobile_lcdc_overlay_setup(ovl); 1456 1457 info->fix.line_length = ovl->pitch; 1458 1459 if (sh_mobile_format_is_fourcc(&info->var)) { 1460 info->fix.type = FB_TYPE_FOURCC; 1461 info->fix.visual = FB_VISUAL_FOURCC; 1462 } else { 1463 info->fix.type = FB_TYPE_PACKED_PIXELS; 1464 info->fix.visual = FB_VISUAL_TRUECOLOR; 1465 } 1466 1467 return 0; 1468 } 1469 1470 /* Overlay blanking. Disable the overlay when blanked. */ 1471 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info) 1472 { 1473 struct sh_mobile_lcdc_overlay *ovl = info->par; 1474 1475 ovl->enabled = !blank; 1476 sh_mobile_lcdc_overlay_setup(ovl); 1477 1478 /* Prevent the backlight from receiving a blanking event by returning 1479 * a non-zero value. 1480 */ 1481 return 1; 1482 } 1483 1484 static int 1485 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma) 1486 { 1487 struct sh_mobile_lcdc_overlay *ovl = info->par; 1488 1489 return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem, 1490 ovl->dma_handle, ovl->fb_size); 1491 } 1492 1493 static const struct fb_ops sh_mobile_lcdc_overlay_ops = { 1494 .owner = THIS_MODULE, 1495 .fb_read = fb_sys_read, 1496 .fb_write = fb_sys_write, 1497 .fb_fillrect = sys_fillrect, 1498 .fb_copyarea = sys_copyarea, 1499 .fb_imageblit = sys_imageblit, 1500 .fb_blank = sh_mobile_lcdc_overlay_blank, 1501 .fb_pan_display = sh_mobile_lcdc_overlay_pan, 1502 .fb_ioctl = sh_mobile_lcdc_overlay_ioctl, 1503 .fb_check_var = sh_mobile_lcdc_overlay_check_var, 1504 .fb_set_par = sh_mobile_lcdc_overlay_set_par, 1505 .fb_mmap = sh_mobile_lcdc_overlay_mmap, 1506 }; 1507 1508 static void 1509 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl) 1510 { 1511 struct fb_info *info = ovl->info; 1512 1513 if (info == NULL || info->dev == NULL) 1514 return; 1515 1516 unregister_framebuffer(ovl->info); 1517 } 1518 1519 static int 1520 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl) 1521 { 1522 struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc; 1523 struct fb_info *info = ovl->info; 1524 unsigned int i; 1525 int ret; 1526 1527 if (info == NULL) 1528 return 0; 1529 1530 ret = register_framebuffer(info); 1531 if (ret < 0) 1532 return ret; 1533 1534 dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n", 1535 dev_name(lcdc->dev), ovl->index, info->var.xres, 1536 info->var.yres, info->var.bits_per_pixel); 1537 1538 for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) { 1539 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]); 1540 if (ret < 0) 1541 return ret; 1542 } 1543 1544 return 0; 1545 } 1546 1547 static void 1548 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl) 1549 { 1550 struct fb_info *info = ovl->info; 1551 1552 if (info == NULL || info->device == NULL) 1553 return; 1554 1555 framebuffer_release(info); 1556 } 1557 1558 static int 1559 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl) 1560 { 1561 struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc; 1562 struct fb_var_screeninfo *var; 1563 struct fb_info *info; 1564 1565 /* Allocate and initialize the frame buffer device. */ 1566 info = framebuffer_alloc(0, priv->dev); 1567 if (!info) 1568 return -ENOMEM; 1569 1570 ovl->info = info; 1571 1572 info->flags = FBINFO_FLAG_DEFAULT; 1573 info->fbops = &sh_mobile_lcdc_overlay_ops; 1574 info->device = priv->dev; 1575 info->screen_base = ovl->fb_mem; 1576 info->par = ovl; 1577 1578 /* Initialize fixed screen information. Restrict pan to 2 lines steps 1579 * for NV12 and NV21. 1580 */ 1581 info->fix = sh_mobile_lcdc_overlay_fix; 1582 snprintf(info->fix.id, sizeof(info->fix.id), 1583 "SH Mobile LCDC Overlay %u", ovl->index); 1584 info->fix.smem_start = ovl->dma_handle; 1585 info->fix.smem_len = ovl->fb_size; 1586 info->fix.line_length = ovl->pitch; 1587 1588 if (ovl->format->yuv) 1589 info->fix.visual = FB_VISUAL_FOURCC; 1590 else 1591 info->fix.visual = FB_VISUAL_TRUECOLOR; 1592 1593 switch (ovl->format->fourcc) { 1594 case V4L2_PIX_FMT_NV12: 1595 case V4L2_PIX_FMT_NV21: 1596 info->fix.ypanstep = 2; 1597 /* Fall through */ 1598 case V4L2_PIX_FMT_NV16: 1599 case V4L2_PIX_FMT_NV61: 1600 info->fix.xpanstep = 2; 1601 } 1602 1603 /* Initialize variable screen information. */ 1604 var = &info->var; 1605 memset(var, 0, sizeof(*var)); 1606 var->xres = ovl->xres; 1607 var->yres = ovl->yres; 1608 var->xres_virtual = ovl->xres_virtual; 1609 var->yres_virtual = ovl->yres_virtual; 1610 var->activate = FB_ACTIVATE_NOW; 1611 1612 /* Use the legacy API by default for RGB formats, and the FOURCC API 1613 * for YUV formats. 1614 */ 1615 if (!ovl->format->yuv) 1616 var->bits_per_pixel = ovl->format->bpp; 1617 else 1618 var->grayscale = ovl->format->fourcc; 1619 1620 return sh_mobile_lcdc_overlay_check_var(var, info); 1621 } 1622 1623 /* ----------------------------------------------------------------------------- 1624 * Frame buffer operations - main frame buffer 1625 */ 1626 1627 static int sh_mobile_lcdc_setcolreg(u_int regno, 1628 u_int red, u_int green, u_int blue, 1629 u_int transp, struct fb_info *info) 1630 { 1631 u32 *palette = info->pseudo_palette; 1632 1633 if (regno >= PALETTE_NR) 1634 return -EINVAL; 1635 1636 /* only FB_VISUAL_TRUECOLOR supported */ 1637 1638 red >>= 16 - info->var.red.length; 1639 green >>= 16 - info->var.green.length; 1640 blue >>= 16 - info->var.blue.length; 1641 transp >>= 16 - info->var.transp.length; 1642 1643 palette[regno] = (red << info->var.red.offset) | 1644 (green << info->var.green.offset) | 1645 (blue << info->var.blue.offset) | 1646 (transp << info->var.transp.offset); 1647 1648 return 0; 1649 } 1650 1651 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix = { 1652 .id = "SH Mobile LCDC", 1653 .type = FB_TYPE_PACKED_PIXELS, 1654 .visual = FB_VISUAL_TRUECOLOR, 1655 .accel = FB_ACCEL_NONE, 1656 .xpanstep = 1, 1657 .ypanstep = 1, 1658 .ywrapstep = 0, 1659 .capabilities = FB_CAP_FOURCC, 1660 }; 1661 1662 static void sh_mobile_lcdc_fillrect(struct fb_info *info, 1663 const struct fb_fillrect *rect) 1664 { 1665 sys_fillrect(info, rect); 1666 sh_mobile_lcdc_deferred_io_touch(info); 1667 } 1668 1669 static void sh_mobile_lcdc_copyarea(struct fb_info *info, 1670 const struct fb_copyarea *area) 1671 { 1672 sys_copyarea(info, area); 1673 sh_mobile_lcdc_deferred_io_touch(info); 1674 } 1675 1676 static void sh_mobile_lcdc_imageblit(struct fb_info *info, 1677 const struct fb_image *image) 1678 { 1679 sys_imageblit(info, image); 1680 sh_mobile_lcdc_deferred_io_touch(info); 1681 } 1682 1683 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var, 1684 struct fb_info *info) 1685 { 1686 struct sh_mobile_lcdc_chan *ch = info->par; 1687 struct sh_mobile_lcdc_priv *priv = ch->lcdc; 1688 unsigned long ldrcntr; 1689 unsigned long base_addr_y, base_addr_c; 1690 unsigned long y_offset; 1691 unsigned long c_offset; 1692 1693 if (!ch->format->yuv) { 1694 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset) 1695 * ch->format->bpp / 8; 1696 c_offset = 0; 1697 } else { 1698 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1; 1699 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1; 1700 1701 y_offset = var->yoffset * ch->xres_virtual + var->xoffset; 1702 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub 1703 + var->xoffset * 2 / xsub; 1704 } 1705 1706 /* If the Y offset hasn't changed, the C offset hasn't either. There's 1707 * nothing to do in that case. 1708 */ 1709 if (y_offset == ch->pan_y_offset) 1710 return 0; 1711 1712 /* Set the source address for the next refresh */ 1713 base_addr_y = ch->dma_handle + y_offset; 1714 base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual 1715 + c_offset; 1716 1717 ch->base_addr_y = base_addr_y; 1718 ch->base_addr_c = base_addr_c; 1719 ch->pan_y_offset = y_offset; 1720 1721 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y); 1722 if (ch->format->yuv) 1723 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c); 1724 1725 ldrcntr = lcdc_read(priv, _LDRCNTR); 1726 if (lcdc_chan_is_sublcd(ch)) 1727 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS); 1728 else 1729 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS); 1730 1731 1732 sh_mobile_lcdc_deferred_io_touch(info); 1733 1734 return 0; 1735 } 1736 1737 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd, 1738 unsigned long arg) 1739 { 1740 struct sh_mobile_lcdc_chan *ch = info->par; 1741 int retval; 1742 1743 switch (cmd) { 1744 case FBIO_WAITFORVSYNC: 1745 retval = sh_mobile_lcdc_wait_for_vsync(ch); 1746 break; 1747 1748 default: 1749 retval = -ENOIOCTLCMD; 1750 break; 1751 } 1752 return retval; 1753 } 1754 1755 static void sh_mobile_fb_reconfig(struct fb_info *info) 1756 { 1757 struct sh_mobile_lcdc_chan *ch = info->par; 1758 struct fb_var_screeninfo var; 1759 struct fb_videomode mode; 1760 1761 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par)) 1762 /* More framebuffer users are active */ 1763 return; 1764 1765 fb_var_to_videomode(&mode, &info->var); 1766 1767 if (fb_mode_is_equal(&ch->display.mode, &mode)) 1768 return; 1769 1770 /* Display has been re-plugged, framebuffer is free now, reconfigure */ 1771 var = info->var; 1772 fb_videomode_to_var(&var, &ch->display.mode); 1773 var.width = ch->display.width; 1774 var.height = ch->display.height; 1775 var.activate = FB_ACTIVATE_NOW; 1776 1777 if (fb_set_var(info, &var) < 0) 1778 /* Couldn't reconfigure, hopefully, can continue as before */ 1779 return; 1780 1781 fbcon_update_vcs(info, true); 1782 } 1783 1784 /* 1785 * Locking: both .fb_release() and .fb_open() are called with info->lock held if 1786 * user == 1, or with console sem held, if user == 0. 1787 */ 1788 static int sh_mobile_lcdc_release(struct fb_info *info, int user) 1789 { 1790 struct sh_mobile_lcdc_chan *ch = info->par; 1791 1792 mutex_lock(&ch->open_lock); 1793 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count); 1794 1795 ch->use_count--; 1796 1797 /* Nothing to reconfigure, when called from fbcon */ 1798 if (user) { 1799 console_lock(); 1800 sh_mobile_fb_reconfig(info); 1801 console_unlock(); 1802 } 1803 1804 mutex_unlock(&ch->open_lock); 1805 1806 return 0; 1807 } 1808 1809 static int sh_mobile_lcdc_open(struct fb_info *info, int user) 1810 { 1811 struct sh_mobile_lcdc_chan *ch = info->par; 1812 1813 mutex_lock(&ch->open_lock); 1814 ch->use_count++; 1815 1816 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count); 1817 mutex_unlock(&ch->open_lock); 1818 1819 return 0; 1820 } 1821 1822 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var, 1823 struct fb_info *info) 1824 { 1825 struct sh_mobile_lcdc_chan *ch = info->par; 1826 struct sh_mobile_lcdc_priv *p = ch->lcdc; 1827 unsigned int best_dist = (unsigned int)-1; 1828 unsigned int best_xres = 0; 1829 unsigned int best_yres = 0; 1830 unsigned int i; 1831 int ret; 1832 1833 /* If board code provides us with a list of available modes, make sure 1834 * we use one of them. Find the mode closest to the requested one. The 1835 * distance between two modes is defined as the size of the 1836 * non-overlapping parts of the two rectangles. 1837 */ 1838 for (i = 0; i < ch->cfg->num_modes; ++i) { 1839 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i]; 1840 unsigned int dist; 1841 1842 /* We can only round up. */ 1843 if (var->xres > mode->xres || var->yres > mode->yres) 1844 continue; 1845 1846 dist = var->xres * var->yres + mode->xres * mode->yres 1847 - 2 * min(var->xres, mode->xres) 1848 * min(var->yres, mode->yres); 1849 1850 if (dist < best_dist) { 1851 best_xres = mode->xres; 1852 best_yres = mode->yres; 1853 best_dist = dist; 1854 } 1855 } 1856 1857 /* If no available mode can be used, return an error. */ 1858 if (ch->cfg->num_modes != 0) { 1859 if (best_dist == (unsigned int)-1) 1860 return -EINVAL; 1861 1862 var->xres = best_xres; 1863 var->yres = best_yres; 1864 } 1865 1866 ret = __sh_mobile_lcdc_check_var(var, info); 1867 if (ret < 0) 1868 return ret; 1869 1870 /* only accept the forced_fourcc for dual channel configurations */ 1871 if (p->forced_fourcc && 1872 p->forced_fourcc != sh_mobile_format_fourcc(var)) 1873 return -EINVAL; 1874 1875 return 0; 1876 } 1877 1878 static int sh_mobile_lcdc_set_par(struct fb_info *info) 1879 { 1880 struct sh_mobile_lcdc_chan *ch = info->par; 1881 int ret; 1882 1883 sh_mobile_lcdc_stop(ch->lcdc); 1884 1885 ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var)); 1886 ch->colorspace = info->var.colorspace; 1887 1888 ch->xres = info->var.xres; 1889 ch->xres_virtual = info->var.xres_virtual; 1890 ch->yres = info->var.yres; 1891 ch->yres_virtual = info->var.yres_virtual; 1892 1893 if (ch->format->yuv) 1894 ch->pitch = info->var.xres_virtual; 1895 else 1896 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8; 1897 1898 ret = sh_mobile_lcdc_start(ch->lcdc); 1899 if (ret < 0) 1900 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__); 1901 1902 info->fix.line_length = ch->pitch; 1903 1904 if (sh_mobile_format_is_fourcc(&info->var)) { 1905 info->fix.type = FB_TYPE_FOURCC; 1906 info->fix.visual = FB_VISUAL_FOURCC; 1907 } else { 1908 info->fix.type = FB_TYPE_PACKED_PIXELS; 1909 info->fix.visual = FB_VISUAL_TRUECOLOR; 1910 } 1911 1912 return ret; 1913 } 1914 1915 /* 1916 * Screen blanking. Behavior is as follows: 1917 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled 1918 * FB_BLANK_NORMAL: screen blanked, clocks enabled 1919 * FB_BLANK_VSYNC, 1920 * FB_BLANK_HSYNC, 1921 * FB_BLANK_POWEROFF: screen blanked, clocks disabled 1922 */ 1923 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info) 1924 { 1925 struct sh_mobile_lcdc_chan *ch = info->par; 1926 struct sh_mobile_lcdc_priv *p = ch->lcdc; 1927 1928 /* blank the screen? */ 1929 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) { 1930 struct fb_fillrect rect = { 1931 .width = ch->xres, 1932 .height = ch->yres, 1933 }; 1934 sh_mobile_lcdc_fillrect(info, &rect); 1935 } 1936 /* turn clocks on? */ 1937 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) { 1938 sh_mobile_lcdc_clk_on(p); 1939 } 1940 /* turn clocks off? */ 1941 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) { 1942 /* make sure the screen is updated with the black fill before 1943 * switching the clocks off. one vsync is not enough since 1944 * blanking may occur in the middle of a refresh. deferred io 1945 * mode will reenable the clocks and update the screen in time, 1946 * so it does not need this. */ 1947 if (!info->fbdefio) { 1948 sh_mobile_lcdc_wait_for_vsync(ch); 1949 sh_mobile_lcdc_wait_for_vsync(ch); 1950 } 1951 sh_mobile_lcdc_clk_off(p); 1952 } 1953 1954 ch->blank_status = blank; 1955 return 0; 1956 } 1957 1958 static int 1959 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma) 1960 { 1961 struct sh_mobile_lcdc_chan *ch = info->par; 1962 1963 return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem, 1964 ch->dma_handle, ch->fb_size); 1965 } 1966 1967 static const struct fb_ops sh_mobile_lcdc_ops = { 1968 .owner = THIS_MODULE, 1969 .fb_setcolreg = sh_mobile_lcdc_setcolreg, 1970 .fb_read = fb_sys_read, 1971 .fb_write = fb_sys_write, 1972 .fb_fillrect = sh_mobile_lcdc_fillrect, 1973 .fb_copyarea = sh_mobile_lcdc_copyarea, 1974 .fb_imageblit = sh_mobile_lcdc_imageblit, 1975 .fb_blank = sh_mobile_lcdc_blank, 1976 .fb_pan_display = sh_mobile_lcdc_pan, 1977 .fb_ioctl = sh_mobile_lcdc_ioctl, 1978 .fb_open = sh_mobile_lcdc_open, 1979 .fb_release = sh_mobile_lcdc_release, 1980 .fb_check_var = sh_mobile_lcdc_check_var, 1981 .fb_set_par = sh_mobile_lcdc_set_par, 1982 .fb_mmap = sh_mobile_lcdc_mmap, 1983 }; 1984 1985 static void 1986 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch) 1987 { 1988 if (ch->info && ch->info->dev) 1989 unregister_framebuffer(ch->info); 1990 } 1991 1992 static int 1993 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch) 1994 { 1995 struct fb_info *info = ch->info; 1996 int ret; 1997 1998 if (info->fbdefio) { 1999 ch->sglist = vmalloc(sizeof(struct scatterlist) * 2000 ch->fb_size >> PAGE_SHIFT); 2001 if (!ch->sglist) 2002 return -ENOMEM; 2003 } 2004 2005 info->bl_dev = ch->bl; 2006 2007 ret = register_framebuffer(info); 2008 if (ret < 0) 2009 return ret; 2010 2011 dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n", 2012 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ? 2013 "mainlcd" : "sublcd", info->var.xres, info->var.yres, 2014 info->var.bits_per_pixel); 2015 2016 /* deferred io mode: disable clock to save power */ 2017 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED) 2018 sh_mobile_lcdc_clk_off(ch->lcdc); 2019 2020 return ret; 2021 } 2022 2023 static void 2024 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch) 2025 { 2026 struct fb_info *info = ch->info; 2027 2028 if (!info || !info->device) 2029 return; 2030 2031 vfree(ch->sglist); 2032 2033 fb_dealloc_cmap(&info->cmap); 2034 framebuffer_release(info); 2035 } 2036 2037 static int 2038 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch, 2039 const struct fb_videomode *modes, 2040 unsigned int num_modes) 2041 { 2042 struct sh_mobile_lcdc_priv *priv = ch->lcdc; 2043 struct fb_var_screeninfo *var; 2044 struct fb_info *info; 2045 int ret; 2046 2047 /* Allocate and initialize the frame buffer device. Create the modes 2048 * list and allocate the color map. 2049 */ 2050 info = framebuffer_alloc(0, priv->dev); 2051 if (!info) 2052 return -ENOMEM; 2053 2054 ch->info = info; 2055 2056 info->flags = FBINFO_FLAG_DEFAULT; 2057 info->fbops = &sh_mobile_lcdc_ops; 2058 info->device = priv->dev; 2059 info->screen_base = ch->fb_mem; 2060 info->pseudo_palette = &ch->pseudo_palette; 2061 info->par = ch; 2062 2063 fb_videomode_to_modelist(modes, num_modes, &info->modelist); 2064 2065 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0); 2066 if (ret < 0) { 2067 dev_err(priv->dev, "unable to allocate cmap\n"); 2068 return ret; 2069 } 2070 2071 /* Initialize fixed screen information. Restrict pan to 2 lines steps 2072 * for NV12 and NV21. 2073 */ 2074 info->fix = sh_mobile_lcdc_fix; 2075 info->fix.smem_start = ch->dma_handle; 2076 info->fix.smem_len = ch->fb_size; 2077 info->fix.line_length = ch->pitch; 2078 2079 if (ch->format->yuv) 2080 info->fix.visual = FB_VISUAL_FOURCC; 2081 else 2082 info->fix.visual = FB_VISUAL_TRUECOLOR; 2083 2084 switch (ch->format->fourcc) { 2085 case V4L2_PIX_FMT_NV12: 2086 case V4L2_PIX_FMT_NV21: 2087 info->fix.ypanstep = 2; 2088 /* Fall through */ 2089 case V4L2_PIX_FMT_NV16: 2090 case V4L2_PIX_FMT_NV61: 2091 info->fix.xpanstep = 2; 2092 } 2093 2094 /* Initialize variable screen information using the first mode as 2095 * default. 2096 */ 2097 var = &info->var; 2098 fb_videomode_to_var(var, modes); 2099 var->width = ch->display.width; 2100 var->height = ch->display.height; 2101 var->xres_virtual = ch->xres_virtual; 2102 var->yres_virtual = ch->yres_virtual; 2103 var->activate = FB_ACTIVATE_NOW; 2104 2105 /* Use the legacy API by default for RGB formats, and the FOURCC API 2106 * for YUV formats. 2107 */ 2108 if (!ch->format->yuv) 2109 var->bits_per_pixel = ch->format->bpp; 2110 else 2111 var->grayscale = ch->format->fourcc; 2112 2113 ret = sh_mobile_lcdc_check_var(var, info); 2114 if (ret) 2115 return ret; 2116 2117 return 0; 2118 } 2119 2120 /* ----------------------------------------------------------------------------- 2121 * Backlight 2122 */ 2123 2124 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev) 2125 { 2126 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev); 2127 int brightness = bdev->props.brightness; 2128 2129 if (bdev->props.power != FB_BLANK_UNBLANK || 2130 bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) 2131 brightness = 0; 2132 2133 ch->bl_brightness = brightness; 2134 return ch->cfg->bl_info.set_brightness(brightness); 2135 } 2136 2137 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev) 2138 { 2139 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev); 2140 2141 return ch->bl_brightness; 2142 } 2143 2144 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev, 2145 struct fb_info *info) 2146 { 2147 return (info->bl_dev == bdev); 2148 } 2149 2150 static const struct backlight_ops sh_mobile_lcdc_bl_ops = { 2151 .options = BL_CORE_SUSPENDRESUME, 2152 .update_status = sh_mobile_lcdc_update_bl, 2153 .get_brightness = sh_mobile_lcdc_get_brightness, 2154 .check_fb = sh_mobile_lcdc_check_fb, 2155 }; 2156 2157 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent, 2158 struct sh_mobile_lcdc_chan *ch) 2159 { 2160 struct backlight_device *bl; 2161 2162 bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch, 2163 &sh_mobile_lcdc_bl_ops, NULL); 2164 if (IS_ERR(bl)) { 2165 dev_err(parent, "unable to register backlight device: %ld\n", 2166 PTR_ERR(bl)); 2167 return NULL; 2168 } 2169 2170 bl->props.max_brightness = ch->cfg->bl_info.max_brightness; 2171 bl->props.brightness = bl->props.max_brightness; 2172 backlight_update_status(bl); 2173 2174 return bl; 2175 } 2176 2177 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev) 2178 { 2179 backlight_device_unregister(bdev); 2180 } 2181 2182 /* ----------------------------------------------------------------------------- 2183 * Power management 2184 */ 2185 2186 static int sh_mobile_lcdc_suspend(struct device *dev) 2187 { 2188 struct platform_device *pdev = to_platform_device(dev); 2189 2190 sh_mobile_lcdc_stop(platform_get_drvdata(pdev)); 2191 return 0; 2192 } 2193 2194 static int sh_mobile_lcdc_resume(struct device *dev) 2195 { 2196 struct platform_device *pdev = to_platform_device(dev); 2197 2198 return sh_mobile_lcdc_start(platform_get_drvdata(pdev)); 2199 } 2200 2201 static int sh_mobile_lcdc_runtime_suspend(struct device *dev) 2202 { 2203 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev); 2204 2205 /* turn off LCDC hardware */ 2206 lcdc_write(priv, _LDCNT1R, 0); 2207 2208 return 0; 2209 } 2210 2211 static int sh_mobile_lcdc_runtime_resume(struct device *dev) 2212 { 2213 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev); 2214 2215 __sh_mobile_lcdc_start(priv); 2216 2217 return 0; 2218 } 2219 2220 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = { 2221 .suspend = sh_mobile_lcdc_suspend, 2222 .resume = sh_mobile_lcdc_resume, 2223 .runtime_suspend = sh_mobile_lcdc_runtime_suspend, 2224 .runtime_resume = sh_mobile_lcdc_runtime_resume, 2225 }; 2226 2227 /* ----------------------------------------------------------------------------- 2228 * Framebuffer notifier 2229 */ 2230 2231 /* ----------------------------------------------------------------------------- 2232 * Probe/remove and driver init/exit 2233 */ 2234 2235 static const struct fb_videomode default_720p = { 2236 .name = "HDMI 720p", 2237 .xres = 1280, 2238 .yres = 720, 2239 2240 .left_margin = 220, 2241 .right_margin = 110, 2242 .hsync_len = 40, 2243 2244 .upper_margin = 20, 2245 .lower_margin = 5, 2246 .vsync_len = 5, 2247 2248 .pixclock = 13468, 2249 .refresh = 60, 2250 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT, 2251 }; 2252 2253 static int sh_mobile_lcdc_remove(struct platform_device *pdev) 2254 { 2255 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev); 2256 unsigned int i; 2257 2258 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) 2259 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]); 2260 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) 2261 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]); 2262 2263 sh_mobile_lcdc_stop(priv); 2264 2265 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) { 2266 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2267 2268 sh_mobile_lcdc_overlay_fb_cleanup(ovl); 2269 2270 if (ovl->fb_mem) 2271 dma_free_coherent(&pdev->dev, ovl->fb_size, 2272 ovl->fb_mem, ovl->dma_handle); 2273 } 2274 2275 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { 2276 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2277 2278 if (ch->tx_dev) { 2279 ch->tx_dev->lcdc = NULL; 2280 module_put(ch->cfg->tx_dev->dev.driver->owner); 2281 } 2282 2283 sh_mobile_lcdc_channel_fb_cleanup(ch); 2284 2285 if (ch->fb_mem) 2286 dma_free_coherent(&pdev->dev, ch->fb_size, 2287 ch->fb_mem, ch->dma_handle); 2288 } 2289 2290 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { 2291 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2292 2293 if (ch->bl) 2294 sh_mobile_lcdc_bl_remove(ch->bl); 2295 mutex_destroy(&ch->open_lock); 2296 } 2297 2298 if (priv->dot_clk) { 2299 pm_runtime_disable(&pdev->dev); 2300 clk_put(priv->dot_clk); 2301 } 2302 2303 if (priv->base) 2304 iounmap(priv->base); 2305 2306 if (priv->irq) 2307 free_irq(priv->irq, priv); 2308 kfree(priv); 2309 return 0; 2310 } 2311 2312 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch) 2313 { 2314 int interface_type = ch->cfg->interface_type; 2315 2316 switch (interface_type) { 2317 case RGB8: 2318 case RGB9: 2319 case RGB12A: 2320 case RGB12B: 2321 case RGB16: 2322 case RGB18: 2323 case RGB24: 2324 case SYS8A: 2325 case SYS8B: 2326 case SYS8C: 2327 case SYS8D: 2328 case SYS9: 2329 case SYS12: 2330 case SYS16A: 2331 case SYS16B: 2332 case SYS16C: 2333 case SYS18: 2334 case SYS24: 2335 break; 2336 default: 2337 return -EINVAL; 2338 } 2339 2340 /* SUBLCD only supports SYS interface */ 2341 if (lcdc_chan_is_sublcd(ch)) { 2342 if (!(interface_type & LDMT1R_IFM)) 2343 return -EINVAL; 2344 2345 interface_type &= ~LDMT1R_IFM; 2346 } 2347 2348 ch->ldmt1r_value = interface_type; 2349 return 0; 2350 } 2351 2352 static int 2353 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl) 2354 { 2355 const struct sh_mobile_lcdc_format_info *format; 2356 struct device *dev = ovl->channel->lcdc->dev; 2357 int ret; 2358 2359 if (ovl->cfg->fourcc == 0) 2360 return 0; 2361 2362 /* Validate the format. */ 2363 format = sh_mobile_format_info(ovl->cfg->fourcc); 2364 if (format == NULL) { 2365 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc); 2366 return -EINVAL; 2367 } 2368 2369 ovl->enabled = false; 2370 ovl->mode = LCDC_OVERLAY_BLEND; 2371 ovl->alpha = 255; 2372 ovl->rop3 = 0; 2373 ovl->pos_x = 0; 2374 ovl->pos_y = 0; 2375 2376 /* The default Y virtual resolution is twice the panel size to allow for 2377 * double-buffering. 2378 */ 2379 ovl->format = format; 2380 ovl->xres = ovl->cfg->max_xres; 2381 ovl->xres_virtual = ovl->xres; 2382 ovl->yres = ovl->cfg->max_yres; 2383 ovl->yres_virtual = ovl->yres * 2; 2384 2385 if (!format->yuv) 2386 ovl->pitch = ovl->xres_virtual * format->bpp / 8; 2387 else 2388 ovl->pitch = ovl->xres_virtual; 2389 2390 /* Allocate frame buffer memory. */ 2391 ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres 2392 * format->bpp / 8 * 2; 2393 ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle, 2394 GFP_KERNEL); 2395 if (!ovl->fb_mem) { 2396 dev_err(dev, "unable to allocate buffer\n"); 2397 return -ENOMEM; 2398 } 2399 2400 ret = sh_mobile_lcdc_overlay_fb_init(ovl); 2401 if (ret < 0) 2402 return ret; 2403 2404 return 0; 2405 } 2406 2407 static int 2408 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch) 2409 { 2410 const struct sh_mobile_lcdc_format_info *format; 2411 const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg; 2412 struct device *dev = ch->lcdc->dev; 2413 const struct fb_videomode *max_mode; 2414 const struct fb_videomode *mode; 2415 unsigned int num_modes; 2416 unsigned int max_size; 2417 unsigned int i; 2418 2419 /* Validate the format. */ 2420 format = sh_mobile_format_info(cfg->fourcc); 2421 if (format == NULL) { 2422 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc); 2423 return -EINVAL; 2424 } 2425 2426 /* Iterate through the modes to validate them and find the highest 2427 * resolution. 2428 */ 2429 max_mode = NULL; 2430 max_size = 0; 2431 2432 for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) { 2433 unsigned int size = mode->yres * mode->xres; 2434 2435 /* NV12/NV21 buffers must have even number of lines */ 2436 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 || 2437 cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) { 2438 dev_err(dev, "yres must be multiple of 2 for " 2439 "YCbCr420 mode.\n"); 2440 return -EINVAL; 2441 } 2442 2443 if (size > max_size) { 2444 max_mode = mode; 2445 max_size = size; 2446 } 2447 } 2448 2449 if (!max_size) 2450 max_size = MAX_XRES * MAX_YRES; 2451 else 2452 dev_dbg(dev, "Found largest videomode %ux%u\n", 2453 max_mode->xres, max_mode->yres); 2454 2455 if (cfg->lcd_modes == NULL) { 2456 mode = &default_720p; 2457 num_modes = 1; 2458 } else { 2459 mode = cfg->lcd_modes; 2460 num_modes = cfg->num_modes; 2461 } 2462 2463 /* Use the first mode as default. The default Y virtual resolution is 2464 * twice the panel size to allow for double-buffering. 2465 */ 2466 ch->format = format; 2467 ch->xres = mode->xres; 2468 ch->xres_virtual = mode->xres; 2469 ch->yres = mode->yres; 2470 ch->yres_virtual = mode->yres * 2; 2471 2472 if (!format->yuv) { 2473 ch->colorspace = V4L2_COLORSPACE_SRGB; 2474 ch->pitch = ch->xres_virtual * format->bpp / 8; 2475 } else { 2476 ch->colorspace = V4L2_COLORSPACE_REC709; 2477 ch->pitch = ch->xres_virtual; 2478 } 2479 2480 ch->display.width = cfg->panel_cfg.width; 2481 ch->display.height = cfg->panel_cfg.height; 2482 ch->display.mode = *mode; 2483 2484 /* Allocate frame buffer memory. */ 2485 ch->fb_size = max_size * format->bpp / 8 * 2; 2486 ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle, 2487 GFP_KERNEL); 2488 if (ch->fb_mem == NULL) { 2489 dev_err(dev, "unable to allocate buffer\n"); 2490 return -ENOMEM; 2491 } 2492 2493 /* Initialize the transmitter device if present. */ 2494 if (cfg->tx_dev) { 2495 if (!cfg->tx_dev->dev.driver || 2496 !try_module_get(cfg->tx_dev->dev.driver->owner)) { 2497 dev_warn(dev, "unable to get transmitter device\n"); 2498 return -EINVAL; 2499 } 2500 ch->tx_dev = platform_get_drvdata(cfg->tx_dev); 2501 ch->tx_dev->lcdc = ch; 2502 ch->tx_dev->def_mode = *mode; 2503 } 2504 2505 return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes); 2506 } 2507 2508 static int sh_mobile_lcdc_probe(struct platform_device *pdev) 2509 { 2510 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data; 2511 struct sh_mobile_lcdc_priv *priv; 2512 struct resource *res; 2513 int num_channels; 2514 int error; 2515 int irq, i; 2516 2517 if (!pdata) { 2518 dev_err(&pdev->dev, "no platform data defined\n"); 2519 return -EINVAL; 2520 } 2521 2522 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2523 irq = platform_get_irq(pdev, 0); 2524 if (!res || irq < 0) { 2525 dev_err(&pdev->dev, "cannot get platform resources\n"); 2526 return -ENOENT; 2527 } 2528 2529 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 2530 if (!priv) 2531 return -ENOMEM; 2532 2533 priv->dev = &pdev->dev; 2534 2535 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) 2536 mutex_init(&priv->ch[i].open_lock); 2537 platform_set_drvdata(pdev, priv); 2538 2539 error = request_irq(irq, sh_mobile_lcdc_irq, 0, 2540 dev_name(&pdev->dev), priv); 2541 if (error) { 2542 dev_err(&pdev->dev, "unable to request irq\n"); 2543 goto err1; 2544 } 2545 2546 priv->irq = irq; 2547 atomic_set(&priv->hw_usecnt, -1); 2548 2549 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) { 2550 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels; 2551 2552 ch->lcdc = priv; 2553 ch->cfg = &pdata->ch[i]; 2554 2555 error = sh_mobile_lcdc_check_interface(ch); 2556 if (error) { 2557 dev_err(&pdev->dev, "unsupported interface type\n"); 2558 goto err1; 2559 } 2560 init_waitqueue_head(&ch->frame_end_wait); 2561 init_completion(&ch->vsync_completion); 2562 2563 /* probe the backlight is there is one defined */ 2564 if (ch->cfg->bl_info.max_brightness) 2565 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch); 2566 2567 switch (pdata->ch[i].chan) { 2568 case LCDC_CHAN_MAINLCD: 2569 ch->enabled = LDCNT2R_ME; 2570 ch->reg_offs = lcdc_offs_mainlcd; 2571 num_channels++; 2572 break; 2573 case LCDC_CHAN_SUBLCD: 2574 ch->enabled = LDCNT2R_SE; 2575 ch->reg_offs = lcdc_offs_sublcd; 2576 num_channels++; 2577 break; 2578 } 2579 } 2580 2581 if (!num_channels) { 2582 dev_err(&pdev->dev, "no channels defined\n"); 2583 error = -EINVAL; 2584 goto err1; 2585 } 2586 2587 /* for dual channel LCDC (MAIN + SUB) force shared format setting */ 2588 if (num_channels == 2) 2589 priv->forced_fourcc = pdata->ch[0].fourcc; 2590 2591 priv->base = ioremap(res->start, resource_size(res)); 2592 if (!priv->base) { 2593 error = -ENOMEM; 2594 goto err1; 2595 } 2596 2597 error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source); 2598 if (error) { 2599 dev_err(&pdev->dev, "unable to setup clocks\n"); 2600 goto err1; 2601 } 2602 2603 /* Enable runtime PM. */ 2604 pm_runtime_enable(&pdev->dev); 2605 2606 for (i = 0; i < num_channels; i++) { 2607 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2608 2609 error = sh_mobile_lcdc_channel_init(ch); 2610 if (error) 2611 goto err1; 2612 } 2613 2614 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) { 2615 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2616 2617 ovl->cfg = &pdata->overlays[i]; 2618 ovl->channel = &priv->ch[0]; 2619 2620 error = sh_mobile_lcdc_overlay_init(ovl); 2621 if (error) 2622 goto err1; 2623 } 2624 2625 error = sh_mobile_lcdc_start(priv); 2626 if (error) { 2627 dev_err(&pdev->dev, "unable to start hardware\n"); 2628 goto err1; 2629 } 2630 2631 for (i = 0; i < num_channels; i++) { 2632 struct sh_mobile_lcdc_chan *ch = priv->ch + i; 2633 2634 error = sh_mobile_lcdc_channel_fb_register(ch); 2635 if (error) 2636 goto err1; 2637 } 2638 2639 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) { 2640 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2641 2642 error = sh_mobile_lcdc_overlay_fb_register(ovl); 2643 if (error) 2644 goto err1; 2645 } 2646 2647 return 0; 2648 err1: 2649 sh_mobile_lcdc_remove(pdev); 2650 2651 return error; 2652 } 2653 2654 static struct platform_driver sh_mobile_lcdc_driver = { 2655 .driver = { 2656 .name = "sh_mobile_lcdc_fb", 2657 .pm = &sh_mobile_lcdc_dev_pm_ops, 2658 }, 2659 .probe = sh_mobile_lcdc_probe, 2660 .remove = sh_mobile_lcdc_remove, 2661 }; 2662 2663 module_platform_driver(sh_mobile_lcdc_driver); 2664 2665 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver"); 2666 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>"); 2667 MODULE_LICENSE("GPL v2"); 2668