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