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, struct list_head *pagereflist) 439 { 440 struct sh_mobile_lcdc_chan *ch = info->par; 441 unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT; 442 struct fb_deferred_io_pageref *pageref; 443 int nr_pages = 0; 444 445 sg_init_table(ch->sglist, nr_pages_max); 446 447 list_for_each_entry(pageref, pagereflist, list) { 448 sg_set_page(&ch->sglist[nr_pages++], pageref->page, PAGE_SIZE, 0); 449 } 450 451 return nr_pages; 452 } 453 454 static void sh_mobile_lcdc_deferred_io(struct fb_info *info, struct list_head *pagereflist) 455 { 456 struct sh_mobile_lcdc_chan *ch = info->par; 457 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg; 458 459 /* enable clocks before accessing hardware */ 460 sh_mobile_lcdc_clk_on(ch->lcdc); 461 462 /* 463 * It's possible to get here without anything on the pagereflist via 464 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync() 465 * invocation. In the former case, the acceleration routines are 466 * stepped in to when using the framebuffer console causing the 467 * workqueue to be scheduled without any dirty pages on the list. 468 * 469 * Despite this, a panel update is still needed given that the 470 * acceleration routines have their own methods for writing in 471 * that still need to be updated. 472 * 473 * The fsync() and empty pagereflist case could be optimized for, 474 * but we don't bother, as any application exhibiting such 475 * behaviour is fundamentally broken anyways. 476 */ 477 if (!list_empty(pagereflist)) { 478 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagereflist); 479 480 /* trigger panel update */ 481 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE); 482 if (panel->start_transfer) 483 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops); 484 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG); 485 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages, 486 DMA_TO_DEVICE); 487 } else { 488 if (panel->start_transfer) 489 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops); 490 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG); 491 } 492 } 493 494 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info) 495 { 496 struct fb_deferred_io *fbdefio = info->fbdefio; 497 498 if (fbdefio) 499 schedule_delayed_work(&info->deferred_work, fbdefio->delay); 500 } 501 502 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch) 503 { 504 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg; 505 506 if (ch->tx_dev) { 507 int ret; 508 509 ret = ch->tx_dev->ops->display_on(ch->tx_dev); 510 if (ret < 0) 511 return; 512 513 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED) 514 ch->info->state = FBINFO_STATE_SUSPENDED; 515 } 516 517 /* HDMI must be enabled before LCDC configuration */ 518 if (panel->display_on) 519 panel->display_on(); 520 } 521 522 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch) 523 { 524 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg; 525 526 if (panel->display_off) 527 panel->display_off(); 528 529 if (ch->tx_dev) 530 ch->tx_dev->ops->display_off(ch->tx_dev); 531 } 532 533 /* ----------------------------------------------------------------------------- 534 * Format helpers 535 */ 536 537 struct sh_mobile_lcdc_format_info { 538 u32 fourcc; 539 unsigned int bpp; 540 bool yuv; 541 u32 lddfr; 542 }; 543 544 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = { 545 { 546 .fourcc = V4L2_PIX_FMT_RGB565, 547 .bpp = 16, 548 .yuv = false, 549 .lddfr = LDDFR_PKF_RGB16, 550 }, { 551 .fourcc = V4L2_PIX_FMT_BGR24, 552 .bpp = 24, 553 .yuv = false, 554 .lddfr = LDDFR_PKF_RGB24, 555 }, { 556 .fourcc = V4L2_PIX_FMT_BGR32, 557 .bpp = 32, 558 .yuv = false, 559 .lddfr = LDDFR_PKF_ARGB32, 560 }, { 561 .fourcc = V4L2_PIX_FMT_NV12, 562 .bpp = 12, 563 .yuv = true, 564 .lddfr = LDDFR_CC | LDDFR_YF_420, 565 }, { 566 .fourcc = V4L2_PIX_FMT_NV21, 567 .bpp = 12, 568 .yuv = true, 569 .lddfr = LDDFR_CC | LDDFR_YF_420, 570 }, { 571 .fourcc = V4L2_PIX_FMT_NV16, 572 .bpp = 16, 573 .yuv = true, 574 .lddfr = LDDFR_CC | LDDFR_YF_422, 575 }, { 576 .fourcc = V4L2_PIX_FMT_NV61, 577 .bpp = 16, 578 .yuv = true, 579 .lddfr = LDDFR_CC | LDDFR_YF_422, 580 }, { 581 .fourcc = V4L2_PIX_FMT_NV24, 582 .bpp = 24, 583 .yuv = true, 584 .lddfr = LDDFR_CC | LDDFR_YF_444, 585 }, { 586 .fourcc = V4L2_PIX_FMT_NV42, 587 .bpp = 24, 588 .yuv = true, 589 .lddfr = LDDFR_CC | LDDFR_YF_444, 590 }, 591 }; 592 593 static const struct sh_mobile_lcdc_format_info * 594 sh_mobile_format_info(u32 fourcc) 595 { 596 unsigned int i; 597 598 for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) { 599 if (sh_mobile_format_infos[i].fourcc == fourcc) 600 return &sh_mobile_format_infos[i]; 601 } 602 603 return NULL; 604 } 605 606 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var) 607 { 608 if (var->grayscale > 1) 609 return var->grayscale; 610 611 switch (var->bits_per_pixel) { 612 case 16: 613 return V4L2_PIX_FMT_RGB565; 614 case 24: 615 return V4L2_PIX_FMT_BGR24; 616 case 32: 617 return V4L2_PIX_FMT_BGR32; 618 default: 619 return 0; 620 } 621 } 622 623 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var) 624 { 625 return var->grayscale > 1; 626 } 627 628 /* ----------------------------------------------------------------------------- 629 * Start, stop and IRQ 630 */ 631 632 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data) 633 { 634 struct sh_mobile_lcdc_priv *priv = data; 635 struct sh_mobile_lcdc_chan *ch; 636 unsigned long ldintr; 637 int is_sub; 638 int k; 639 640 /* Acknowledge interrupts and disable further VSYNC End IRQs. */ 641 ldintr = lcdc_read(priv, _LDINTR); 642 lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE); 643 644 /* figure out if this interrupt is for main or sub lcd */ 645 is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0; 646 647 /* wake up channel and disable clocks */ 648 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 649 ch = &priv->ch[k]; 650 651 if (!ch->enabled) 652 continue; 653 654 /* Frame End */ 655 if (ldintr & LDINTR_FS) { 656 if (is_sub == lcdc_chan_is_sublcd(ch)) { 657 ch->frame_end = 1; 658 wake_up(&ch->frame_end_wait); 659 660 sh_mobile_lcdc_clk_off(priv); 661 } 662 } 663 664 /* VSYNC End */ 665 if (ldintr & LDINTR_VES) 666 complete(&ch->vsync_completion); 667 } 668 669 return IRQ_HANDLED; 670 } 671 672 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch) 673 { 674 unsigned long ldintr; 675 int ret; 676 677 /* Enable VSync End interrupt and be careful not to acknowledge any 678 * pending interrupt. 679 */ 680 ldintr = lcdc_read(ch->lcdc, _LDINTR); 681 ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK; 682 lcdc_write(ch->lcdc, _LDINTR, ldintr); 683 684 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion, 685 msecs_to_jiffies(100)); 686 if (!ret) 687 return -ETIMEDOUT; 688 689 return 0; 690 } 691 692 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv, 693 int start) 694 { 695 unsigned long tmp = lcdc_read(priv, _LDCNT2R); 696 int k; 697 698 /* start or stop the lcdc */ 699 if (start) 700 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO); 701 else 702 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO); 703 704 /* wait until power is applied/stopped on all channels */ 705 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) 706 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled) 707 while (1) { 708 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) 709 & LDPMR_LPS; 710 if (start && tmp == LDPMR_LPS) 711 break; 712 if (!start && tmp == 0) 713 break; 714 cpu_relax(); 715 } 716 717 if (!start) 718 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */ 719 } 720 721 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch) 722 { 723 const struct fb_var_screeninfo *var = &ch->info->var; 724 const struct fb_videomode *mode = &ch->display.mode; 725 unsigned long h_total, hsync_pos, display_h_total; 726 u32 tmp; 727 728 tmp = ch->ldmt1r_value; 729 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL; 730 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL; 731 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0; 732 tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0; 733 tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0; 734 tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0; 735 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0; 736 lcdc_write_chan(ch, LDMT1R, tmp); 737 738 /* setup SYS bus */ 739 lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r); 740 lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r); 741 742 /* horizontal configuration */ 743 h_total = mode->xres + mode->hsync_len + mode->left_margin 744 + mode->right_margin; 745 tmp = h_total / 8; /* HTCN */ 746 tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */ 747 lcdc_write_chan(ch, LDHCNR, tmp); 748 749 hsync_pos = mode->xres + mode->right_margin; 750 tmp = hsync_pos / 8; /* HSYNP */ 751 tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */ 752 lcdc_write_chan(ch, LDHSYNR, tmp); 753 754 /* vertical configuration */ 755 tmp = mode->yres + mode->vsync_len + mode->upper_margin 756 + mode->lower_margin; /* VTLN */ 757 tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */ 758 lcdc_write_chan(ch, LDVLNR, tmp); 759 760 tmp = mode->yres + mode->lower_margin; /* VSYNP */ 761 tmp |= mode->vsync_len << 16; /* VSYNW */ 762 lcdc_write_chan(ch, LDVSYNR, tmp); 763 764 /* Adjust horizontal synchronisation for HDMI */ 765 display_h_total = mode->xres + mode->hsync_len + mode->left_margin 766 + mode->right_margin; 767 tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16) 768 | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7); 769 lcdc_write_chan(ch, LDHAJR, tmp); 770 lcdc_write_chan_mirror(ch, LDHAJR, tmp); 771 } 772 773 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl) 774 { 775 u32 format = 0; 776 777 if (!ovl->enabled) { 778 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index)); 779 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0); 780 lcdc_write(ovl->channel->lcdc, LDBCR, 781 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index)); 782 return; 783 } 784 785 ovl->base_addr_y = ovl->dma_handle; 786 ovl->base_addr_c = ovl->dma_handle 787 + ovl->xres_virtual * ovl->yres_virtual; 788 789 switch (ovl->mode) { 790 case LCDC_OVERLAY_BLEND: 791 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT); 792 break; 793 794 case LCDC_OVERLAY_ROP3: 795 format = LDBBSIFR_EN | LDBBSIFR_BRSEL 796 | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT); 797 break; 798 } 799 800 switch (ovl->format->fourcc) { 801 case V4L2_PIX_FMT_RGB565: 802 case V4L2_PIX_FMT_NV21: 803 case V4L2_PIX_FMT_NV61: 804 case V4L2_PIX_FMT_NV42: 805 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW; 806 break; 807 case V4L2_PIX_FMT_BGR24: 808 case V4L2_PIX_FMT_NV12: 809 case V4L2_PIX_FMT_NV16: 810 case V4L2_PIX_FMT_NV24: 811 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB; 812 break; 813 case V4L2_PIX_FMT_BGR32: 814 default: 815 format |= LDBBSIFR_SWPL; 816 break; 817 } 818 819 switch (ovl->format->fourcc) { 820 case V4L2_PIX_FMT_RGB565: 821 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16; 822 break; 823 case V4L2_PIX_FMT_BGR24: 824 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24; 825 break; 826 case V4L2_PIX_FMT_BGR32: 827 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDBBSIFR_RPKF_ARGB32; 828 break; 829 case V4L2_PIX_FMT_NV12: 830 case V4L2_PIX_FMT_NV21: 831 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420; 832 break; 833 case V4L2_PIX_FMT_NV16: 834 case V4L2_PIX_FMT_NV61: 835 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422; 836 break; 837 case V4L2_PIX_FMT_NV24: 838 case V4L2_PIX_FMT_NV42: 839 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444; 840 break; 841 } 842 843 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index)); 844 845 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format); 846 847 lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index), 848 (ovl->yres << LDBBSSZR_BVSS_SHIFT) | 849 (ovl->xres << LDBBSSZR_BHSS_SHIFT)); 850 lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index), 851 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) | 852 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT)); 853 lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index), 854 ovl->pitch << LDBBSMWR_BSMW_SHIFT); 855 856 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y); 857 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c); 858 859 lcdc_write(ovl->channel->lcdc, LDBCR, 860 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index)); 861 } 862 863 /* 864 * __sh_mobile_lcdc_start - Configure and start the LCDC 865 * @priv: LCDC device 866 * 867 * Configure all enabled channels and start the LCDC device. All external 868 * devices (clocks, MERAM, panels, ...) are not touched by this function. 869 */ 870 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) 871 { 872 struct sh_mobile_lcdc_chan *ch; 873 unsigned long tmp; 874 int k, m; 875 876 /* Enable LCDC channels. Read data from external memory, avoid using the 877 * BEU for now. 878 */ 879 lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled); 880 881 /* Stop the LCDC first and disable all interrupts. */ 882 sh_mobile_lcdc_start_stop(priv, 0); 883 lcdc_write(priv, _LDINTR, 0); 884 885 /* Configure power supply, dot clocks and start them. */ 886 tmp = priv->lddckr; 887 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 888 ch = &priv->ch[k]; 889 if (!ch->enabled) 890 continue; 891 892 /* Power supply */ 893 lcdc_write_chan(ch, LDPMR, 0); 894 895 m = ch->cfg->clock_divider; 896 if (!m) 897 continue; 898 899 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider 900 * denominator. 901 */ 902 lcdc_write_chan(ch, LDDCKPAT1R, 0); 903 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1); 904 905 if (m == 1) 906 m = LDDCKR_MOSEL; 907 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0); 908 } 909 910 lcdc_write(priv, _LDDCKR, tmp); 911 lcdc_write(priv, _LDDCKSTPR, 0); 912 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0); 913 914 /* Setup geometry, format, frame buffer memory and operation mode. */ 915 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 916 ch = &priv->ch[k]; 917 if (!ch->enabled) 918 continue; 919 920 sh_mobile_lcdc_geometry(ch); 921 922 tmp = ch->format->lddfr; 923 924 if (ch->format->yuv) { 925 switch (ch->colorspace) { 926 case V4L2_COLORSPACE_REC709: 927 tmp |= LDDFR_CF1; 928 break; 929 case V4L2_COLORSPACE_JPEG: 930 tmp |= LDDFR_CF0; 931 break; 932 } 933 } 934 935 lcdc_write_chan(ch, LDDFR, tmp); 936 lcdc_write_chan(ch, LDMLSR, ch->line_size); 937 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y); 938 if (ch->format->yuv) 939 lcdc_write_chan(ch, LDSA2R, ch->base_addr_c); 940 941 /* When using deferred I/O mode, configure the LCDC for one-shot 942 * operation and enable the frame end interrupt. Otherwise use 943 * continuous read mode. 944 */ 945 if (ch->ldmt1r_value & LDMT1R_IFM && 946 ch->cfg->sys_bus_cfg.deferred_io_msec) { 947 lcdc_write_chan(ch, LDSM1R, LDSM1R_OS); 948 lcdc_write(priv, _LDINTR, LDINTR_FE); 949 } else { 950 lcdc_write_chan(ch, LDSM1R, 0); 951 } 952 } 953 954 /* Word and long word swap. */ 955 switch (priv->ch[0].format->fourcc) { 956 case V4L2_PIX_FMT_RGB565: 957 case V4L2_PIX_FMT_NV21: 958 case V4L2_PIX_FMT_NV61: 959 case V4L2_PIX_FMT_NV42: 960 tmp = LDDDSR_LS | LDDDSR_WS; 961 break; 962 case V4L2_PIX_FMT_BGR24: 963 case V4L2_PIX_FMT_NV12: 964 case V4L2_PIX_FMT_NV16: 965 case V4L2_PIX_FMT_NV24: 966 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS; 967 break; 968 case V4L2_PIX_FMT_BGR32: 969 default: 970 tmp = LDDDSR_LS; 971 break; 972 } 973 lcdc_write(priv, _LDDDSR, tmp); 974 975 /* Enable the display output. */ 976 lcdc_write(priv, _LDCNT1R, LDCNT1R_DE); 977 sh_mobile_lcdc_start_stop(priv, 1); 978 priv->started = 1; 979 } 980 981 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) 982 { 983 struct sh_mobile_lcdc_chan *ch; 984 unsigned long tmp; 985 int ret; 986 int k; 987 988 /* enable clocks before accessing the hardware */ 989 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 990 if (priv->ch[k].enabled) 991 sh_mobile_lcdc_clk_on(priv); 992 } 993 994 /* reset */ 995 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR); 996 lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0); 997 998 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 999 const struct sh_mobile_lcdc_panel_cfg *panel; 1000 1001 ch = &priv->ch[k]; 1002 if (!ch->enabled) 1003 continue; 1004 1005 panel = &ch->cfg->panel_cfg; 1006 if (panel->setup_sys) { 1007 ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops); 1008 if (ret) 1009 return ret; 1010 } 1011 } 1012 1013 /* Compute frame buffer base address and pitch for each channel. */ 1014 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 1015 ch = &priv->ch[k]; 1016 if (!ch->enabled) 1017 continue; 1018 1019 ch->base_addr_y = ch->dma_handle; 1020 ch->base_addr_c = ch->dma_handle 1021 + ch->xres_virtual * ch->yres_virtual; 1022 ch->line_size = ch->pitch; 1023 } 1024 1025 for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) { 1026 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k]; 1027 sh_mobile_lcdc_overlay_setup(ovl); 1028 } 1029 1030 /* Start the LCDC. */ 1031 __sh_mobile_lcdc_start(priv); 1032 1033 /* Setup deferred I/O, tell the board code to enable the panels, and 1034 * turn backlight on. 1035 */ 1036 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 1037 ch = &priv->ch[k]; 1038 if (!ch->enabled) 1039 continue; 1040 1041 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec; 1042 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) { 1043 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io; 1044 ch->defio.delay = msecs_to_jiffies(tmp); 1045 ch->info->fbdefio = &ch->defio; 1046 fb_deferred_io_init(ch->info); 1047 } 1048 1049 sh_mobile_lcdc_display_on(ch); 1050 1051 if (ch->bl) { 1052 ch->bl->props.power = BACKLIGHT_POWER_ON; 1053 backlight_update_status(ch->bl); 1054 } 1055 } 1056 1057 return 0; 1058 } 1059 1060 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv) 1061 { 1062 struct sh_mobile_lcdc_chan *ch; 1063 int k; 1064 1065 /* clean up deferred io and ask board code to disable panel */ 1066 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { 1067 ch = &priv->ch[k]; 1068 if (!ch->enabled) 1069 continue; 1070 1071 /* deferred io mode: 1072 * flush frame, and wait for frame end interrupt 1073 * clean up deferred io and enable clock 1074 */ 1075 if (ch->info && ch->info->fbdefio) { 1076 ch->frame_end = 0; 1077 schedule_delayed_work(&ch->info->deferred_work, 0); 1078 wait_event(ch->frame_end_wait, ch->frame_end); 1079 fb_deferred_io_cleanup(ch->info); 1080 ch->info->fbdefio = NULL; 1081 sh_mobile_lcdc_clk_on(priv); 1082 } 1083 1084 if (ch->bl) { 1085 ch->bl->props.power = BACKLIGHT_POWER_OFF; 1086 backlight_update_status(ch->bl); 1087 } 1088 1089 sh_mobile_lcdc_display_off(ch); 1090 } 1091 1092 /* stop the lcdc */ 1093 if (priv->started) { 1094 sh_mobile_lcdc_start_stop(priv, 0); 1095 priv->started = 0; 1096 } 1097 1098 /* stop clocks */ 1099 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) 1100 if (priv->ch[k].enabled) 1101 sh_mobile_lcdc_clk_off(priv); 1102 } 1103 1104 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var, 1105 struct fb_info *info) 1106 { 1107 if (var->xres > MAX_XRES || var->yres > MAX_YRES) 1108 return -EINVAL; 1109 1110 /* Make sure the virtual resolution is at least as big as the visible 1111 * resolution. 1112 */ 1113 if (var->xres_virtual < var->xres) 1114 var->xres_virtual = var->xres; 1115 if (var->yres_virtual < var->yres) 1116 var->yres_virtual = var->yres; 1117 1118 if (sh_mobile_format_is_fourcc(var)) { 1119 const struct sh_mobile_lcdc_format_info *format; 1120 1121 format = sh_mobile_format_info(var->grayscale); 1122 if (format == NULL) 1123 return -EINVAL; 1124 var->bits_per_pixel = format->bpp; 1125 1126 /* Default to RGB and JPEG color-spaces for RGB and YUV formats 1127 * respectively. 1128 */ 1129 if (!format->yuv) 1130 var->colorspace = V4L2_COLORSPACE_SRGB; 1131 else if (var->colorspace != V4L2_COLORSPACE_REC709) 1132 var->colorspace = V4L2_COLORSPACE_JPEG; 1133 } else { 1134 if (var->bits_per_pixel <= 16) { /* RGB 565 */ 1135 var->bits_per_pixel = 16; 1136 var->red.offset = 11; 1137 var->red.length = 5; 1138 var->green.offset = 5; 1139 var->green.length = 6; 1140 var->blue.offset = 0; 1141 var->blue.length = 5; 1142 var->transp.offset = 0; 1143 var->transp.length = 0; 1144 } else if (var->bits_per_pixel <= 24) { /* RGB 888 */ 1145 var->bits_per_pixel = 24; 1146 var->red.offset = 16; 1147 var->red.length = 8; 1148 var->green.offset = 8; 1149 var->green.length = 8; 1150 var->blue.offset = 0; 1151 var->blue.length = 8; 1152 var->transp.offset = 0; 1153 var->transp.length = 0; 1154 } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */ 1155 var->bits_per_pixel = 32; 1156 var->red.offset = 16; 1157 var->red.length = 8; 1158 var->green.offset = 8; 1159 var->green.length = 8; 1160 var->blue.offset = 0; 1161 var->blue.length = 8; 1162 var->transp.offset = 24; 1163 var->transp.length = 8; 1164 } else 1165 return -EINVAL; 1166 1167 var->red.msb_right = 0; 1168 var->green.msb_right = 0; 1169 var->blue.msb_right = 0; 1170 var->transp.msb_right = 0; 1171 } 1172 1173 /* Make sure we don't exceed our allocated memory. */ 1174 if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 > 1175 info->fix.smem_len) 1176 return -EINVAL; 1177 1178 return 0; 1179 } 1180 1181 /* ----------------------------------------------------------------------------- 1182 * Frame buffer operations - Overlays 1183 */ 1184 1185 static ssize_t 1186 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf) 1187 { 1188 struct fb_info *info = dev_get_drvdata(dev); 1189 struct sh_mobile_lcdc_overlay *ovl = info->par; 1190 1191 return sysfs_emit(buf, "%u\n", ovl->alpha); 1192 } 1193 1194 static ssize_t 1195 overlay_alpha_store(struct device *dev, struct device_attribute *attr, 1196 const char *buf, size_t count) 1197 { 1198 struct fb_info *info = dev_get_drvdata(dev); 1199 struct sh_mobile_lcdc_overlay *ovl = info->par; 1200 unsigned int alpha; 1201 char *endp; 1202 1203 alpha = simple_strtoul(buf, &endp, 10); 1204 if (isspace(*endp)) 1205 endp++; 1206 1207 if (endp - buf != count) 1208 return -EINVAL; 1209 1210 if (alpha > 255) 1211 return -EINVAL; 1212 1213 if (ovl->alpha != alpha) { 1214 ovl->alpha = alpha; 1215 1216 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled) 1217 sh_mobile_lcdc_overlay_setup(ovl); 1218 } 1219 1220 return count; 1221 } 1222 1223 static ssize_t 1224 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf) 1225 { 1226 struct fb_info *info = dev_get_drvdata(dev); 1227 struct sh_mobile_lcdc_overlay *ovl = info->par; 1228 1229 return sysfs_emit(buf, "%u\n", ovl->mode); 1230 } 1231 1232 static ssize_t 1233 overlay_mode_store(struct device *dev, struct device_attribute *attr, 1234 const char *buf, size_t count) 1235 { 1236 struct fb_info *info = dev_get_drvdata(dev); 1237 struct sh_mobile_lcdc_overlay *ovl = info->par; 1238 unsigned int mode; 1239 char *endp; 1240 1241 mode = simple_strtoul(buf, &endp, 10); 1242 if (isspace(*endp)) 1243 endp++; 1244 1245 if (endp - buf != count) 1246 return -EINVAL; 1247 1248 if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3) 1249 return -EINVAL; 1250 1251 if (ovl->mode != mode) { 1252 ovl->mode = mode; 1253 1254 if (ovl->enabled) 1255 sh_mobile_lcdc_overlay_setup(ovl); 1256 } 1257 1258 return count; 1259 } 1260 1261 static ssize_t 1262 overlay_position_show(struct device *dev, struct device_attribute *attr, 1263 char *buf) 1264 { 1265 struct fb_info *info = dev_get_drvdata(dev); 1266 struct sh_mobile_lcdc_overlay *ovl = info->par; 1267 1268 return sysfs_emit(buf, "%d,%d\n", ovl->pos_x, ovl->pos_y); 1269 } 1270 1271 static ssize_t 1272 overlay_position_store(struct device *dev, struct device_attribute *attr, 1273 const char *buf, size_t count) 1274 { 1275 struct fb_info *info = dev_get_drvdata(dev); 1276 struct sh_mobile_lcdc_overlay *ovl = info->par; 1277 char *endp; 1278 int pos_x; 1279 int pos_y; 1280 1281 pos_x = simple_strtol(buf, &endp, 10); 1282 if (*endp != ',') 1283 return -EINVAL; 1284 1285 pos_y = simple_strtol(endp + 1, &endp, 10); 1286 if (isspace(*endp)) 1287 endp++; 1288 1289 if (endp - buf != count) 1290 return -EINVAL; 1291 1292 if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) { 1293 ovl->pos_x = pos_x; 1294 ovl->pos_y = pos_y; 1295 1296 if (ovl->enabled) 1297 sh_mobile_lcdc_overlay_setup(ovl); 1298 } 1299 1300 return count; 1301 } 1302 1303 static ssize_t 1304 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf) 1305 { 1306 struct fb_info *info = dev_get_drvdata(dev); 1307 struct sh_mobile_lcdc_overlay *ovl = info->par; 1308 1309 return sysfs_emit(buf, "%u\n", ovl->rop3); 1310 } 1311 1312 static ssize_t 1313 overlay_rop3_store(struct device *dev, struct device_attribute *attr, 1314 const char *buf, size_t count) 1315 { 1316 struct fb_info *info = dev_get_drvdata(dev); 1317 struct sh_mobile_lcdc_overlay *ovl = info->par; 1318 unsigned int rop3; 1319 char *endp; 1320 1321 rop3 = simple_strtoul(buf, &endp, 10); 1322 if (isspace(*endp)) 1323 endp++; 1324 1325 if (endp - buf != count) 1326 return -EINVAL; 1327 1328 if (rop3 > 255) 1329 return -EINVAL; 1330 1331 if (ovl->rop3 != rop3) { 1332 ovl->rop3 = rop3; 1333 1334 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled) 1335 sh_mobile_lcdc_overlay_setup(ovl); 1336 } 1337 1338 return count; 1339 } 1340 1341 static DEVICE_ATTR_RW(overlay_alpha); 1342 static DEVICE_ATTR_RW(overlay_mode); 1343 static DEVICE_ATTR_RW(overlay_position); 1344 static DEVICE_ATTR_RW(overlay_rop3); 1345 1346 static struct attribute *overlay_sysfs_attrs[] __maybe_unused = { 1347 &dev_attr_overlay_alpha.attr, 1348 &dev_attr_overlay_mode.attr, 1349 &dev_attr_overlay_position.attr, 1350 &dev_attr_overlay_rop3.attr, 1351 NULL, 1352 }; 1353 1354 #ifdef CONFIG_FB_DEVICE 1355 ATTRIBUTE_GROUPS(overlay_sysfs); 1356 #endif 1357 1358 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix = { 1359 .id = "SH Mobile LCDC", 1360 .type = FB_TYPE_PACKED_PIXELS, 1361 .visual = FB_VISUAL_TRUECOLOR, 1362 .accel = FB_ACCEL_NONE, 1363 .xpanstep = 1, 1364 .ypanstep = 1, 1365 .ywrapstep = 0, 1366 .capabilities = FB_CAP_FOURCC, 1367 }; 1368 1369 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var, 1370 struct fb_info *info) 1371 { 1372 struct sh_mobile_lcdc_overlay *ovl = info->par; 1373 unsigned long base_addr_y; 1374 unsigned long base_addr_c; 1375 unsigned long y_offset; 1376 unsigned long c_offset; 1377 1378 if (!ovl->format->yuv) { 1379 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset) 1380 * ovl->format->bpp / 8; 1381 c_offset = 0; 1382 } else { 1383 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1; 1384 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1; 1385 1386 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset; 1387 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub 1388 + var->xoffset * 2 / xsub; 1389 } 1390 1391 /* If the Y offset hasn't changed, the C offset hasn't either. There's 1392 * nothing to do in that case. 1393 */ 1394 if (y_offset == ovl->pan_y_offset) 1395 return 0; 1396 1397 /* Set the source address for the next refresh */ 1398 base_addr_y = ovl->dma_handle + y_offset; 1399 base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual 1400 + c_offset; 1401 1402 ovl->base_addr_y = base_addr_y; 1403 ovl->base_addr_c = base_addr_c; 1404 ovl->pan_y_offset = y_offset; 1405 1406 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index)); 1407 1408 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y); 1409 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c); 1410 1411 lcdc_write(ovl->channel->lcdc, LDBCR, 1412 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index)); 1413 1414 return 0; 1415 } 1416 1417 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd, 1418 unsigned long arg) 1419 { 1420 struct sh_mobile_lcdc_overlay *ovl = info->par; 1421 1422 switch (cmd) { 1423 case FBIO_WAITFORVSYNC: 1424 return sh_mobile_lcdc_wait_for_vsync(ovl->channel); 1425 1426 default: 1427 return -ENOIOCTLCMD; 1428 } 1429 } 1430 1431 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var, 1432 struct fb_info *info) 1433 { 1434 return __sh_mobile_lcdc_check_var(var, info); 1435 } 1436 1437 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info) 1438 { 1439 struct sh_mobile_lcdc_overlay *ovl = info->par; 1440 1441 ovl->format = 1442 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var)); 1443 1444 ovl->xres = info->var.xres; 1445 ovl->xres_virtual = info->var.xres_virtual; 1446 ovl->yres = info->var.yres; 1447 ovl->yres_virtual = info->var.yres_virtual; 1448 1449 if (ovl->format->yuv) 1450 ovl->pitch = info->var.xres_virtual; 1451 else 1452 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8; 1453 1454 sh_mobile_lcdc_overlay_setup(ovl); 1455 1456 info->fix.line_length = ovl->pitch; 1457 1458 if (sh_mobile_format_is_fourcc(&info->var)) { 1459 info->fix.type = FB_TYPE_FOURCC; 1460 info->fix.visual = FB_VISUAL_FOURCC; 1461 } else { 1462 info->fix.type = FB_TYPE_PACKED_PIXELS; 1463 info->fix.visual = FB_VISUAL_TRUECOLOR; 1464 } 1465 1466 return 0; 1467 } 1468 1469 /* Overlay blanking. Disable the overlay when blanked. */ 1470 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info) 1471 { 1472 struct sh_mobile_lcdc_overlay *ovl = info->par; 1473 1474 ovl->enabled = !blank; 1475 sh_mobile_lcdc_overlay_setup(ovl); 1476 1477 /* Prevent the backlight from receiving a blanking event by returning 1478 * a non-zero value. 1479 */ 1480 return 1; 1481 } 1482 1483 static int 1484 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma) 1485 { 1486 struct sh_mobile_lcdc_overlay *ovl = info->par; 1487 1488 if (info->fbdefio) 1489 return fb_deferred_io_mmap(info, vma); 1490 1491 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); 1492 1493 return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem, 1494 ovl->dma_handle, ovl->fb_size); 1495 } 1496 1497 static const struct fb_ops sh_mobile_lcdc_overlay_ops = { 1498 .owner = THIS_MODULE, 1499 __FB_DEFAULT_DMAMEM_OPS_RDWR, 1500 .fb_blank = sh_mobile_lcdc_overlay_blank, 1501 .fb_pan_display = sh_mobile_lcdc_overlay_pan, 1502 __FB_DEFAULT_DMAMEM_OPS_DRAW, 1503 .fb_ioctl = sh_mobile_lcdc_overlay_ioctl, 1504 .fb_check_var = sh_mobile_lcdc_overlay_check_var, 1505 .fb_set_par = sh_mobile_lcdc_overlay_set_par, 1506 .fb_mmap = sh_mobile_lcdc_overlay_mmap, 1507 }; 1508 1509 static void 1510 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl) 1511 { 1512 struct fb_info *info = ovl->info; 1513 1514 if (info == NULL || info->dev == NULL) 1515 return; 1516 1517 unregister_framebuffer(ovl->info); 1518 } 1519 1520 static int 1521 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl) 1522 { 1523 struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc; 1524 struct fb_info *info = ovl->info; 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 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->fbops = &sh_mobile_lcdc_overlay_ops; 1567 info->device = priv->dev; 1568 info->flags |= FBINFO_VIRTFB; 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 "SHMobile ovl %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 if (info->fbdefio) 1958 return fb_deferred_io_mmap(info, vma); 1959 1960 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); 1961 1962 return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem, 1963 ch->dma_handle, ch->fb_size); 1964 } 1965 1966 static const struct fb_ops sh_mobile_lcdc_ops = { 1967 .owner = THIS_MODULE, 1968 .fb_setcolreg = sh_mobile_lcdc_setcolreg, 1969 __FB_DEFAULT_DMAMEM_OPS_RDWR, 1970 .fb_fillrect = sh_mobile_lcdc_fillrect, 1971 .fb_copyarea = sh_mobile_lcdc_copyarea, 1972 .fb_imageblit = sh_mobile_lcdc_imageblit, 1973 .fb_blank = sh_mobile_lcdc_blank, 1974 .fb_pan_display = sh_mobile_lcdc_pan, 1975 .fb_ioctl = sh_mobile_lcdc_ioctl, 1976 .fb_open = sh_mobile_lcdc_open, 1977 .fb_release = sh_mobile_lcdc_release, 1978 .fb_check_var = sh_mobile_lcdc_check_var, 1979 .fb_set_par = sh_mobile_lcdc_set_par, 1980 .fb_mmap = sh_mobile_lcdc_mmap, 1981 }; 1982 1983 static void 1984 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch) 1985 { 1986 if (ch->info && ch->info->dev) 1987 unregister_framebuffer(ch->info); 1988 } 1989 1990 static int 1991 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch) 1992 { 1993 struct fb_info *info = ch->info; 1994 int ret; 1995 1996 if (info->fbdefio) { 1997 ch->sglist = vmalloc(sizeof(struct scatterlist) * 1998 ch->fb_size >> PAGE_SHIFT); 1999 if (!ch->sglist) 2000 return -ENOMEM; 2001 } 2002 2003 info->bl_dev = ch->bl; 2004 2005 ret = register_framebuffer(info); 2006 if (ret < 0) 2007 return ret; 2008 2009 dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n", 2010 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ? 2011 "mainlcd" : "sublcd", info->var.xres, info->var.yres, 2012 info->var.bits_per_pixel); 2013 2014 /* deferred io mode: disable clock to save power */ 2015 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED) 2016 sh_mobile_lcdc_clk_off(ch->lcdc); 2017 2018 return ret; 2019 } 2020 2021 static void 2022 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch) 2023 { 2024 struct fb_info *info = ch->info; 2025 2026 if (!info || !info->device) 2027 return; 2028 2029 vfree(ch->sglist); 2030 2031 fb_dealloc_cmap(&info->cmap); 2032 framebuffer_release(info); 2033 } 2034 2035 static int 2036 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch, 2037 const struct fb_videomode *modes, 2038 unsigned int num_modes) 2039 { 2040 struct sh_mobile_lcdc_priv *priv = ch->lcdc; 2041 struct fb_var_screeninfo *var; 2042 struct fb_info *info; 2043 int ret; 2044 2045 /* Allocate and initialize the frame buffer device. Create the modes 2046 * list and allocate the color map. 2047 */ 2048 info = framebuffer_alloc(0, priv->dev); 2049 if (!info) 2050 return -ENOMEM; 2051 2052 ch->info = info; 2053 2054 info->fbops = &sh_mobile_lcdc_ops; 2055 info->device = priv->dev; 2056 info->flags |= FBINFO_VIRTFB; 2057 info->screen_buffer = ch->fb_mem; 2058 info->pseudo_palette = &ch->pseudo_palette; 2059 info->par = ch; 2060 2061 fb_videomode_to_modelist(modes, num_modes, &info->modelist); 2062 2063 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0); 2064 if (ret < 0) { 2065 dev_err(priv->dev, "unable to allocate cmap\n"); 2066 return ret; 2067 } 2068 2069 /* Initialize fixed screen information. Restrict pan to 2 lines steps 2070 * for NV12 and NV21. 2071 */ 2072 info->fix = sh_mobile_lcdc_fix; 2073 info->fix.smem_start = ch->dma_handle; 2074 info->fix.smem_len = ch->fb_size; 2075 info->fix.line_length = ch->pitch; 2076 2077 if (ch->format->yuv) 2078 info->fix.visual = FB_VISUAL_FOURCC; 2079 else 2080 info->fix.visual = FB_VISUAL_TRUECOLOR; 2081 2082 switch (ch->format->fourcc) { 2083 case V4L2_PIX_FMT_NV12: 2084 case V4L2_PIX_FMT_NV21: 2085 info->fix.ypanstep = 2; 2086 fallthrough; 2087 case V4L2_PIX_FMT_NV16: 2088 case V4L2_PIX_FMT_NV61: 2089 info->fix.xpanstep = 2; 2090 } 2091 2092 /* Initialize variable screen information using the first mode as 2093 * default. 2094 */ 2095 var = &info->var; 2096 fb_videomode_to_var(var, modes); 2097 var->width = ch->display.width; 2098 var->height = ch->display.height; 2099 var->xres_virtual = ch->xres_virtual; 2100 var->yres_virtual = ch->yres_virtual; 2101 var->activate = FB_ACTIVATE_NOW; 2102 2103 /* Use the legacy API by default for RGB formats, and the FOURCC API 2104 * for YUV formats. 2105 */ 2106 if (!ch->format->yuv) 2107 var->bits_per_pixel = ch->format->bpp; 2108 else 2109 var->grayscale = ch->format->fourcc; 2110 2111 ret = sh_mobile_lcdc_check_var(var, info); 2112 if (ret) 2113 return ret; 2114 2115 return 0; 2116 } 2117 2118 /* ----------------------------------------------------------------------------- 2119 * Backlight 2120 */ 2121 2122 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev) 2123 { 2124 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev); 2125 int brightness = backlight_get_brightness(bdev); 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 const struct backlight_ops sh_mobile_lcdc_bl_ops = { 2139 .options = BL_CORE_SUSPENDRESUME, 2140 .update_status = sh_mobile_lcdc_update_bl, 2141 .get_brightness = sh_mobile_lcdc_get_brightness, 2142 }; 2143 2144 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent, 2145 struct sh_mobile_lcdc_chan *ch) 2146 { 2147 struct backlight_device *bl; 2148 2149 bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch, 2150 &sh_mobile_lcdc_bl_ops, NULL); 2151 if (IS_ERR(bl)) { 2152 dev_err(parent, "unable to register backlight device: %ld\n", 2153 PTR_ERR(bl)); 2154 return NULL; 2155 } 2156 2157 bl->props.max_brightness = ch->cfg->bl_info.max_brightness; 2158 bl->props.brightness = bl->props.max_brightness; 2159 backlight_update_status(bl); 2160 2161 return bl; 2162 } 2163 2164 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev) 2165 { 2166 backlight_device_unregister(bdev); 2167 } 2168 2169 /* ----------------------------------------------------------------------------- 2170 * Power management 2171 */ 2172 2173 static int sh_mobile_lcdc_suspend(struct device *dev) 2174 { 2175 struct platform_device *pdev = to_platform_device(dev); 2176 2177 sh_mobile_lcdc_stop(platform_get_drvdata(pdev)); 2178 return 0; 2179 } 2180 2181 static int sh_mobile_lcdc_resume(struct device *dev) 2182 { 2183 struct platform_device *pdev = to_platform_device(dev); 2184 2185 return sh_mobile_lcdc_start(platform_get_drvdata(pdev)); 2186 } 2187 2188 static int sh_mobile_lcdc_runtime_suspend(struct device *dev) 2189 { 2190 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev); 2191 2192 /* turn off LCDC hardware */ 2193 lcdc_write(priv, _LDCNT1R, 0); 2194 2195 return 0; 2196 } 2197 2198 static int sh_mobile_lcdc_runtime_resume(struct device *dev) 2199 { 2200 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev); 2201 2202 __sh_mobile_lcdc_start(priv); 2203 2204 return 0; 2205 } 2206 2207 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = { 2208 .suspend = sh_mobile_lcdc_suspend, 2209 .resume = sh_mobile_lcdc_resume, 2210 .runtime_suspend = sh_mobile_lcdc_runtime_suspend, 2211 .runtime_resume = sh_mobile_lcdc_runtime_resume, 2212 }; 2213 2214 /* ----------------------------------------------------------------------------- 2215 * Framebuffer notifier 2216 */ 2217 2218 /* ----------------------------------------------------------------------------- 2219 * Probe/remove and driver init/exit 2220 */ 2221 2222 static const struct fb_videomode default_720p = { 2223 .name = "HDMI 720p", 2224 .xres = 1280, 2225 .yres = 720, 2226 2227 .left_margin = 220, 2228 .right_margin = 110, 2229 .hsync_len = 40, 2230 2231 .upper_margin = 20, 2232 .lower_margin = 5, 2233 .vsync_len = 5, 2234 2235 .pixclock = 13468, 2236 .refresh = 60, 2237 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT, 2238 }; 2239 2240 static void sh_mobile_lcdc_remove(struct platform_device *pdev) 2241 { 2242 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev); 2243 unsigned int i; 2244 2245 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) 2246 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]); 2247 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) 2248 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]); 2249 2250 sh_mobile_lcdc_stop(priv); 2251 2252 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) { 2253 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2254 2255 sh_mobile_lcdc_overlay_fb_cleanup(ovl); 2256 2257 if (ovl->fb_mem) 2258 dma_free_coherent(&pdev->dev, ovl->fb_size, 2259 ovl->fb_mem, ovl->dma_handle); 2260 } 2261 2262 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { 2263 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2264 2265 if (ch->tx_dev) { 2266 ch->tx_dev->lcdc = NULL; 2267 module_put(ch->cfg->tx_dev->dev.driver->owner); 2268 } 2269 2270 sh_mobile_lcdc_channel_fb_cleanup(ch); 2271 2272 if (ch->fb_mem) 2273 dma_free_coherent(&pdev->dev, ch->fb_size, 2274 ch->fb_mem, ch->dma_handle); 2275 } 2276 2277 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { 2278 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2279 2280 if (ch->bl) 2281 sh_mobile_lcdc_bl_remove(ch->bl); 2282 mutex_destroy(&ch->open_lock); 2283 } 2284 2285 if (priv->dot_clk) { 2286 pm_runtime_disable(&pdev->dev); 2287 clk_put(priv->dot_clk); 2288 } 2289 2290 if (priv->base) 2291 iounmap(priv->base); 2292 2293 if (priv->irq) 2294 free_irq(priv->irq, priv); 2295 kfree(priv); 2296 } 2297 2298 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch) 2299 { 2300 int interface_type = ch->cfg->interface_type; 2301 2302 switch (interface_type) { 2303 case RGB8: 2304 case RGB9: 2305 case RGB12A: 2306 case RGB12B: 2307 case RGB16: 2308 case RGB18: 2309 case RGB24: 2310 case SYS8A: 2311 case SYS8B: 2312 case SYS8C: 2313 case SYS8D: 2314 case SYS9: 2315 case SYS12: 2316 case SYS16A: 2317 case SYS16B: 2318 case SYS16C: 2319 case SYS18: 2320 case SYS24: 2321 break; 2322 default: 2323 return -EINVAL; 2324 } 2325 2326 /* SUBLCD only supports SYS interface */ 2327 if (lcdc_chan_is_sublcd(ch)) { 2328 if (!(interface_type & LDMT1R_IFM)) 2329 return -EINVAL; 2330 2331 interface_type &= ~LDMT1R_IFM; 2332 } 2333 2334 ch->ldmt1r_value = interface_type; 2335 return 0; 2336 } 2337 2338 static int 2339 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl) 2340 { 2341 const struct sh_mobile_lcdc_format_info *format; 2342 struct device *dev = ovl->channel->lcdc->dev; 2343 int ret; 2344 2345 if (ovl->cfg->fourcc == 0) 2346 return 0; 2347 2348 /* Validate the format. */ 2349 format = sh_mobile_format_info(ovl->cfg->fourcc); 2350 if (format == NULL) { 2351 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc); 2352 return -EINVAL; 2353 } 2354 2355 ovl->enabled = false; 2356 ovl->mode = LCDC_OVERLAY_BLEND; 2357 ovl->alpha = 255; 2358 ovl->rop3 = 0; 2359 ovl->pos_x = 0; 2360 ovl->pos_y = 0; 2361 2362 /* The default Y virtual resolution is twice the panel size to allow for 2363 * double-buffering. 2364 */ 2365 ovl->format = format; 2366 ovl->xres = ovl->cfg->max_xres; 2367 ovl->xres_virtual = ovl->xres; 2368 ovl->yres = ovl->cfg->max_yres; 2369 ovl->yres_virtual = ovl->yres * 2; 2370 2371 if (!format->yuv) 2372 ovl->pitch = ovl->xres_virtual * format->bpp / 8; 2373 else 2374 ovl->pitch = ovl->xres_virtual; 2375 2376 /* Allocate frame buffer memory. */ 2377 ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres 2378 * format->bpp / 8 * 2; 2379 ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle, 2380 GFP_KERNEL); 2381 if (!ovl->fb_mem) { 2382 dev_err(dev, "unable to allocate buffer\n"); 2383 return -ENOMEM; 2384 } 2385 2386 ret = sh_mobile_lcdc_overlay_fb_init(ovl); 2387 if (ret < 0) 2388 return ret; 2389 2390 return 0; 2391 } 2392 2393 static int 2394 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch) 2395 { 2396 const struct sh_mobile_lcdc_format_info *format; 2397 const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg; 2398 struct device *dev = ch->lcdc->dev; 2399 const struct fb_videomode *max_mode; 2400 const struct fb_videomode *mode; 2401 unsigned int num_modes; 2402 unsigned int max_size; 2403 unsigned int i; 2404 2405 /* Validate the format. */ 2406 format = sh_mobile_format_info(cfg->fourcc); 2407 if (format == NULL) { 2408 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc); 2409 return -EINVAL; 2410 } 2411 2412 /* Iterate through the modes to validate them and find the highest 2413 * resolution. 2414 */ 2415 max_mode = NULL; 2416 max_size = 0; 2417 2418 for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) { 2419 unsigned int size = mode->yres * mode->xres; 2420 2421 /* NV12/NV21 buffers must have even number of lines */ 2422 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 || 2423 cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) { 2424 dev_err(dev, "yres must be multiple of 2 for " 2425 "YCbCr420 mode.\n"); 2426 return -EINVAL; 2427 } 2428 2429 if (size > max_size) { 2430 max_mode = mode; 2431 max_size = size; 2432 } 2433 } 2434 2435 if (!max_size) 2436 max_size = MAX_XRES * MAX_YRES; 2437 else 2438 dev_dbg(dev, "Found largest videomode %ux%u\n", 2439 max_mode->xres, max_mode->yres); 2440 2441 if (cfg->lcd_modes == NULL) { 2442 mode = &default_720p; 2443 num_modes = 1; 2444 } else { 2445 mode = cfg->lcd_modes; 2446 num_modes = cfg->num_modes; 2447 } 2448 2449 /* Use the first mode as default. The default Y virtual resolution is 2450 * twice the panel size to allow for double-buffering. 2451 */ 2452 ch->format = format; 2453 ch->xres = mode->xres; 2454 ch->xres_virtual = mode->xres; 2455 ch->yres = mode->yres; 2456 ch->yres_virtual = mode->yres * 2; 2457 2458 if (!format->yuv) { 2459 ch->colorspace = V4L2_COLORSPACE_SRGB; 2460 ch->pitch = ch->xres_virtual * format->bpp / 8; 2461 } else { 2462 ch->colorspace = V4L2_COLORSPACE_REC709; 2463 ch->pitch = ch->xres_virtual; 2464 } 2465 2466 ch->display.width = cfg->panel_cfg.width; 2467 ch->display.height = cfg->panel_cfg.height; 2468 ch->display.mode = *mode; 2469 2470 /* Allocate frame buffer memory. */ 2471 ch->fb_size = max_size * format->bpp / 8 * 2; 2472 ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle, 2473 GFP_KERNEL); 2474 if (ch->fb_mem == NULL) { 2475 dev_err(dev, "unable to allocate buffer\n"); 2476 return -ENOMEM; 2477 } 2478 2479 /* Initialize the transmitter device if present. */ 2480 if (cfg->tx_dev) { 2481 if (!cfg->tx_dev->dev.driver || 2482 !try_module_get(cfg->tx_dev->dev.driver->owner)) { 2483 dev_warn(dev, "unable to get transmitter device\n"); 2484 return -EINVAL; 2485 } 2486 ch->tx_dev = platform_get_drvdata(cfg->tx_dev); 2487 ch->tx_dev->lcdc = ch; 2488 ch->tx_dev->def_mode = *mode; 2489 } 2490 2491 return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes); 2492 } 2493 2494 static int sh_mobile_lcdc_probe(struct platform_device *pdev) 2495 { 2496 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data; 2497 struct sh_mobile_lcdc_priv *priv; 2498 struct resource *res; 2499 int num_channels; 2500 int error; 2501 int irq, i; 2502 2503 if (!pdata) { 2504 dev_err(&pdev->dev, "no platform data defined\n"); 2505 return -EINVAL; 2506 } 2507 2508 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2509 irq = platform_get_irq(pdev, 0); 2510 if (!res || irq < 0) { 2511 dev_err(&pdev->dev, "cannot get platform resources\n"); 2512 return -ENOENT; 2513 } 2514 2515 priv = kzalloc_obj(*priv, GFP_KERNEL); 2516 if (!priv) 2517 return -ENOMEM; 2518 2519 priv->dev = &pdev->dev; 2520 2521 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) 2522 mutex_init(&priv->ch[i].open_lock); 2523 platform_set_drvdata(pdev, priv); 2524 2525 error = request_irq(irq, sh_mobile_lcdc_irq, 0, 2526 dev_name(&pdev->dev), priv); 2527 if (error) { 2528 dev_err(&pdev->dev, "unable to request irq\n"); 2529 goto err1; 2530 } 2531 2532 priv->irq = irq; 2533 atomic_set(&priv->hw_usecnt, -1); 2534 2535 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) { 2536 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels; 2537 2538 ch->lcdc = priv; 2539 ch->cfg = &pdata->ch[i]; 2540 2541 error = sh_mobile_lcdc_check_interface(ch); 2542 if (error) { 2543 dev_err(&pdev->dev, "unsupported interface type\n"); 2544 goto err1; 2545 } 2546 init_waitqueue_head(&ch->frame_end_wait); 2547 init_completion(&ch->vsync_completion); 2548 2549 /* probe the backlight is there is one defined */ 2550 if (ch->cfg->bl_info.max_brightness) 2551 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch); 2552 2553 switch (pdata->ch[i].chan) { 2554 case LCDC_CHAN_MAINLCD: 2555 ch->enabled = LDCNT2R_ME; 2556 ch->reg_offs = lcdc_offs_mainlcd; 2557 num_channels++; 2558 break; 2559 case LCDC_CHAN_SUBLCD: 2560 ch->enabled = LDCNT2R_SE; 2561 ch->reg_offs = lcdc_offs_sublcd; 2562 num_channels++; 2563 break; 2564 } 2565 } 2566 2567 if (!num_channels) { 2568 dev_err(&pdev->dev, "no channels defined\n"); 2569 error = -EINVAL; 2570 goto err1; 2571 } 2572 2573 /* for dual channel LCDC (MAIN + SUB) force shared format setting */ 2574 if (num_channels == 2) 2575 priv->forced_fourcc = pdata->ch[0].fourcc; 2576 2577 priv->base = ioremap(res->start, resource_size(res)); 2578 if (!priv->base) { 2579 error = -ENOMEM; 2580 goto err1; 2581 } 2582 2583 error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source); 2584 if (error) { 2585 dev_err(&pdev->dev, "unable to setup clocks\n"); 2586 goto err1; 2587 } 2588 2589 /* Enable runtime PM. */ 2590 pm_runtime_enable(&pdev->dev); 2591 2592 for (i = 0; i < num_channels; i++) { 2593 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2594 2595 error = sh_mobile_lcdc_channel_init(ch); 2596 if (error) 2597 goto err1; 2598 } 2599 2600 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) { 2601 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2602 2603 ovl->cfg = &pdata->overlays[i]; 2604 ovl->channel = &priv->ch[0]; 2605 2606 error = sh_mobile_lcdc_overlay_init(ovl); 2607 if (error) 2608 goto err1; 2609 } 2610 2611 error = sh_mobile_lcdc_start(priv); 2612 if (error) { 2613 dev_err(&pdev->dev, "unable to start hardware\n"); 2614 goto err1; 2615 } 2616 2617 for (i = 0; i < num_channels; i++) { 2618 struct sh_mobile_lcdc_chan *ch = priv->ch + i; 2619 2620 error = sh_mobile_lcdc_channel_fb_register(ch); 2621 if (error) 2622 goto err1; 2623 } 2624 2625 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) { 2626 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2627 2628 error = sh_mobile_lcdc_overlay_fb_register(ovl); 2629 if (error) 2630 goto err1; 2631 } 2632 2633 return 0; 2634 err1: 2635 sh_mobile_lcdc_remove(pdev); 2636 2637 return error; 2638 } 2639 2640 static struct platform_driver sh_mobile_lcdc_driver = { 2641 .driver = { 2642 .name = "sh_mobile_lcdc_fb", 2643 .dev_groups = overlay_sysfs_groups, 2644 .pm = &sh_mobile_lcdc_dev_pm_ops, 2645 }, 2646 .probe = sh_mobile_lcdc_probe, 2647 .remove = sh_mobile_lcdc_remove, 2648 }; 2649 2650 module_platform_driver(sh_mobile_lcdc_driver); 2651 2652 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver"); 2653 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>"); 2654 MODULE_LICENSE("GPL v2"); 2655