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sh_mobile_lcdcfb.c
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linux-6.19.14/drivers/video/fbdev/sh_mobile_lcdcfb.c
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 141enum 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 */ 173struct 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 205struct 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 224static 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 244static 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 262static 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 282static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan) 283{ 284 return chan->cfg->chan == LCDC_CHAN_SUBLCD; 285} 286 287static 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 296static 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 303static 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 309static 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 316static 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 322static 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 328static 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 340static 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 348static 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 356static 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 396static 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 407static 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 418static 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 432static 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 438static 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 454static 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 494static 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 502static 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 522static 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 537struct sh_mobile_lcdc_format_info { 538 u32 fourcc; 539 unsigned int bpp; 540 bool yuv; 541 u32 lddfr; 542}; 543 544static 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 593static const struct sh_mobile_lcdc_format_info * 594sh_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 606static 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 623static 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 632static 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 672static 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 692static 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 721static 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 773static 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 */ 870static 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 981static 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 1060static 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 1104static 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 1185static ssize_t 1186overlay_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 1194static ssize_t 1195overlay_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 1223static ssize_t 1224overlay_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 1232static ssize_t 1233overlay_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 1261static ssize_t 1262overlay_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 1271static ssize_t 1272overlay_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 1303static ssize_t 1304overlay_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 1312static ssize_t 1313overlay_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 1341static DEVICE_ATTR_RW(overlay_alpha); 1342static DEVICE_ATTR_RW(overlay_mode); 1343static DEVICE_ATTR_RW(overlay_position); 1344static DEVICE_ATTR_RW(overlay_rop3); 1345 1346static struct attribute *overlay_sysfs_attrs[] = { 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}; 1353ATTRIBUTE_GROUPS(overlay_sysfs); 1354 1355static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix = { 1356 .id = "SH Mobile LCDC", 1357 .type = FB_TYPE_PACKED_PIXELS, 1358 .visual = FB_VISUAL_TRUECOLOR, 1359 .accel = FB_ACCEL_NONE, 1360 .xpanstep = 1, 1361 .ypanstep = 1, 1362 .ywrapstep = 0, 1363 .capabilities = FB_CAP_FOURCC, 1364}; 1365 1366static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var, 1367 struct fb_info *info) 1368{ 1369 struct sh_mobile_lcdc_overlay *ovl = info->par; 1370 unsigned long base_addr_y; 1371 unsigned long base_addr_c; 1372 unsigned long y_offset; 1373 unsigned long c_offset; 1374 1375 if (!ovl->format->yuv) { 1376 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset) 1377 * ovl->format->bpp / 8; 1378 c_offset = 0; 1379 } else { 1380 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1; 1381 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1; 1382 1383 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset; 1384 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub 1385 + var->xoffset * 2 / xsub; 1386 } 1387 1388 /* If the Y offset hasn't changed, the C offset hasn't either. There's 1389 * nothing to do in that case. 1390 */ 1391 if (y_offset == ovl->pan_y_offset) 1392 return 0; 1393 1394 /* Set the source address for the next refresh */ 1395 base_addr_y = ovl->dma_handle + y_offset; 1396 base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual 1397 + c_offset; 1398 1399 ovl->base_addr_y = base_addr_y; 1400 ovl->base_addr_c = base_addr_c; 1401 ovl->pan_y_offset = y_offset; 1402 1403 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index)); 1404 1405 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y); 1406 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c); 1407 1408 lcdc_write(ovl->channel->lcdc, LDBCR, 1409 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index)); 1410 1411 return 0; 1412} 1413 1414static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd, 1415 unsigned long arg) 1416{ 1417 struct sh_mobile_lcdc_overlay *ovl = info->par; 1418 1419 switch (cmd) { 1420 case FBIO_WAITFORVSYNC: 1421 return sh_mobile_lcdc_wait_for_vsync(ovl->channel); 1422 1423 default: 1424 return -ENOIOCTLCMD; 1425 } 1426} 1427 1428static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var, 1429 struct fb_info *info) 1430{ 1431 return __sh_mobile_lcdc_check_var(var, info); 1432} 1433 1434static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info) 1435{ 1436 struct sh_mobile_lcdc_overlay *ovl = info->par; 1437 1438 ovl->format = 1439 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var)); 1440 1441 ovl->xres = info->var.xres; 1442 ovl->xres_virtual = info->var.xres_virtual; 1443 ovl->yres = info->var.yres; 1444 ovl->yres_virtual = info->var.yres_virtual; 1445 1446 if (ovl->format->yuv) 1447 ovl->pitch = info->var.xres_virtual; 1448 else 1449 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8; 1450 1451 sh_mobile_lcdc_overlay_setup(ovl); 1452 1453 info->fix.line_length = ovl->pitch; 1454 1455 if (sh_mobile_format_is_fourcc(&info->var)) { 1456 info->fix.type = FB_TYPE_FOURCC; 1457 info->fix.visual = FB_VISUAL_FOURCC; 1458 } else { 1459 info->fix.type = FB_TYPE_PACKED_PIXELS; 1460 info->fix.visual = FB_VISUAL_TRUECOLOR; 1461 } 1462 1463 return 0; 1464} 1465 1466/* Overlay blanking. Disable the overlay when blanked. */ 1467static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info) 1468{ 1469 struct sh_mobile_lcdc_overlay *ovl = info->par; 1470 1471 ovl->enabled = !blank; 1472 sh_mobile_lcdc_overlay_setup(ovl); 1473 1474 /* Prevent the backlight from receiving a blanking event by returning 1475 * a non-zero value. 1476 */ 1477 return 1; 1478} 1479 1480static int 1481sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma) 1482{ 1483 struct sh_mobile_lcdc_overlay *ovl = info->par; 1484 1485 if (info->fbdefio) 1486 return fb_deferred_io_mmap(info, vma); 1487 1488 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); 1489 1490 return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem, 1491 ovl->dma_handle, ovl->fb_size); 1492} 1493 1494static const struct fb_ops sh_mobile_lcdc_overlay_ops = { 1495 .owner = THIS_MODULE, 1496 __FB_DEFAULT_DMAMEM_OPS_RDWR, 1497 .fb_blank = sh_mobile_lcdc_overlay_blank, 1498 .fb_pan_display = sh_mobile_lcdc_overlay_pan, 1499 __FB_DEFAULT_DMAMEM_OPS_DRAW, 1500 .fb_ioctl = sh_mobile_lcdc_overlay_ioctl, 1501 .fb_check_var = sh_mobile_lcdc_overlay_check_var, 1502 .fb_set_par = sh_mobile_lcdc_overlay_set_par, 1503 .fb_mmap = sh_mobile_lcdc_overlay_mmap, 1504}; 1505 1506static void 1507sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl) 1508{ 1509 struct fb_info *info = ovl->info; 1510 1511 if (info == NULL || info->dev == NULL) 1512 return; 1513 1514 unregister_framebuffer(ovl->info); 1515} 1516 1517static int 1518sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl) 1519{ 1520 struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc; 1521 struct fb_info *info = ovl->info; 1522 int ret; 1523 1524 if (info == NULL) 1525 return 0; 1526 1527 ret = register_framebuffer(info); 1528 if (ret < 0) 1529 return ret; 1530 1531 dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n", 1532 dev_name(lcdc->dev), ovl->index, info->var.xres, 1533 info->var.yres, info->var.bits_per_pixel); 1534 1535 return 0; 1536} 1537 1538static void 1539sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl) 1540{ 1541 struct fb_info *info = ovl->info; 1542 1543 if (info == NULL || info->device == NULL) 1544 return; 1545 1546 framebuffer_release(info); 1547} 1548 1549static int 1550sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl) 1551{ 1552 struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc; 1553 struct fb_var_screeninfo *var; 1554 struct fb_info *info; 1555 1556 /* Allocate and initialize the frame buffer device. */ 1557 info = framebuffer_alloc(0, priv->dev); 1558 if (!info) 1559 return -ENOMEM; 1560 1561 ovl->info = info; 1562 1563 info->fbops = &sh_mobile_lcdc_overlay_ops; 1564 info->device = priv->dev; 1565 info->flags |= FBINFO_VIRTFB; 1566 info->screen_buffer = ovl->fb_mem; 1567 info->par = ovl; 1568 1569 /* Initialize fixed screen information. Restrict pan to 2 lines steps 1570 * for NV12 and NV21. 1571 */ 1572 info->fix = sh_mobile_lcdc_overlay_fix; 1573 snprintf(info->fix.id, sizeof(info->fix.id), 1574 "SHMobile ovl %u", ovl->index); 1575 info->fix.smem_start = ovl->dma_handle; 1576 info->fix.smem_len = ovl->fb_size; 1577 info->fix.line_length = ovl->pitch; 1578 1579 if (ovl->format->yuv) 1580 info->fix.visual = FB_VISUAL_FOURCC; 1581 else 1582 info->fix.visual = FB_VISUAL_TRUECOLOR; 1583 1584 switch (ovl->format->fourcc) { 1585 case V4L2_PIX_FMT_NV12: 1586 case V4L2_PIX_FMT_NV21: 1587 info->fix.ypanstep = 2; 1588 fallthrough; 1589 case V4L2_PIX_FMT_NV16: 1590 case V4L2_PIX_FMT_NV61: 1591 info->fix.xpanstep = 2; 1592 } 1593 1594 /* Initialize variable screen information. */ 1595 var = &info->var; 1596 memset(var, 0, sizeof(*var)); 1597 var->xres = ovl->xres; 1598 var->yres = ovl->yres; 1599 var->xres_virtual = ovl->xres_virtual; 1600 var->yres_virtual = ovl->yres_virtual; 1601 var->activate = FB_ACTIVATE_NOW; 1602 1603 /* Use the legacy API by default for RGB formats, and the FOURCC API 1604 * for YUV formats. 1605 */ 1606 if (!ovl->format->yuv) 1607 var->bits_per_pixel = ovl->format->bpp; 1608 else 1609 var->grayscale = ovl->format->fourcc; 1610 1611 return sh_mobile_lcdc_overlay_check_var(var, info); 1612} 1613 1614/* ----------------------------------------------------------------------------- 1615 * Frame buffer operations - main frame buffer 1616 */ 1617 1618static int sh_mobile_lcdc_setcolreg(u_int regno, 1619 u_int red, u_int green, u_int blue, 1620 u_int transp, struct fb_info *info) 1621{ 1622 u32 *palette = info->pseudo_palette; 1623 1624 if (regno >= PALETTE_NR) 1625 return -EINVAL; 1626 1627 /* only FB_VISUAL_TRUECOLOR supported */ 1628 1629 red >>= 16 - info->var.red.length; 1630 green >>= 16 - info->var.green.length; 1631 blue >>= 16 - info->var.blue.length; 1632 transp >>= 16 - info->var.transp.length; 1633 1634 palette[regno] = (red << info->var.red.offset) | 1635 (green << info->var.green.offset) | 1636 (blue << info->var.blue.offset) | 1637 (transp << info->var.transp.offset); 1638 1639 return 0; 1640} 1641 1642static const struct fb_fix_screeninfo sh_mobile_lcdc_fix = { 1643 .id = "SH Mobile LCDC", 1644 .type = FB_TYPE_PACKED_PIXELS, 1645 .visual = FB_VISUAL_TRUECOLOR, 1646 .accel = FB_ACCEL_NONE, 1647 .xpanstep = 1, 1648 .ypanstep = 1, 1649 .ywrapstep = 0, 1650 .capabilities = FB_CAP_FOURCC, 1651}; 1652 1653static void sh_mobile_lcdc_fillrect(struct fb_info *info, 1654 const struct fb_fillrect *rect) 1655{ 1656 sys_fillrect(info, rect); 1657 sh_mobile_lcdc_deferred_io_touch(info); 1658} 1659 1660static void sh_mobile_lcdc_copyarea(struct fb_info *info, 1661 const struct fb_copyarea *area) 1662{ 1663 sys_copyarea(info, area); 1664 sh_mobile_lcdc_deferred_io_touch(info); 1665} 1666 1667static void sh_mobile_lcdc_imageblit(struct fb_info *info, 1668 const struct fb_image *image) 1669{ 1670 sys_imageblit(info, image); 1671 sh_mobile_lcdc_deferred_io_touch(info); 1672} 1673 1674static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var, 1675 struct fb_info *info) 1676{ 1677 struct sh_mobile_lcdc_chan *ch = info->par; 1678 struct sh_mobile_lcdc_priv *priv = ch->lcdc; 1679 unsigned long ldrcntr; 1680 unsigned long base_addr_y, base_addr_c; 1681 unsigned long y_offset; 1682 unsigned long c_offset; 1683 1684 if (!ch->format->yuv) { 1685 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset) 1686 * ch->format->bpp / 8; 1687 c_offset = 0; 1688 } else { 1689 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1; 1690 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1; 1691 1692 y_offset = var->yoffset * ch->xres_virtual + var->xoffset; 1693 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub 1694 + var->xoffset * 2 / xsub; 1695 } 1696 1697 /* If the Y offset hasn't changed, the C offset hasn't either. There's 1698 * nothing to do in that case. 1699 */ 1700 if (y_offset == ch->pan_y_offset) 1701 return 0; 1702 1703 /* Set the source address for the next refresh */ 1704 base_addr_y = ch->dma_handle + y_offset; 1705 base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual 1706 + c_offset; 1707 1708 ch->base_addr_y = base_addr_y; 1709 ch->base_addr_c = base_addr_c; 1710 ch->pan_y_offset = y_offset; 1711 1712 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y); 1713 if (ch->format->yuv) 1714 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c); 1715 1716 ldrcntr = lcdc_read(priv, _LDRCNTR); 1717 if (lcdc_chan_is_sublcd(ch)) 1718 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS); 1719 else 1720 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS); 1721 1722 1723 sh_mobile_lcdc_deferred_io_touch(info); 1724 1725 return 0; 1726} 1727 1728static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd, 1729 unsigned long arg) 1730{ 1731 struct sh_mobile_lcdc_chan *ch = info->par; 1732 int retval; 1733 1734 switch (cmd) { 1735 case FBIO_WAITFORVSYNC: 1736 retval = sh_mobile_lcdc_wait_for_vsync(ch); 1737 break; 1738 1739 default: 1740 retval = -ENOIOCTLCMD; 1741 break; 1742 } 1743 return retval; 1744} 1745 1746static void sh_mobile_fb_reconfig(struct fb_info *info) 1747{ 1748 struct sh_mobile_lcdc_chan *ch = info->par; 1749 struct fb_var_screeninfo var; 1750 struct fb_videomode mode; 1751 1752 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par)) 1753 /* More framebuffer users are active */ 1754 return; 1755 1756 fb_var_to_videomode(&mode, &info->var); 1757 1758 if (fb_mode_is_equal(&ch->display.mode, &mode)) 1759 return; 1760 1761 /* Display has been re-plugged, framebuffer is free now, reconfigure */ 1762 var = info->var; 1763 fb_videomode_to_var(&var, &ch->display.mode); 1764 var.width = ch->display.width; 1765 var.height = ch->display.height; 1766 var.activate = FB_ACTIVATE_NOW; 1767 1768 if (fb_set_var(info, &var) < 0) 1769 /* Couldn't reconfigure, hopefully, can continue as before */ 1770 return; 1771 1772 fbcon_update_vcs(info, true); 1773} 1774 1775/* 1776 * Locking: both .fb_release() and .fb_open() are called with info->lock held if 1777 * user == 1, or with console sem held, if user == 0. 1778 */ 1779static int sh_mobile_lcdc_release(struct fb_info *info, int user) 1780{ 1781 struct sh_mobile_lcdc_chan *ch = info->par; 1782 1783 mutex_lock(&ch->open_lock); 1784 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count); 1785 1786 ch->use_count--; 1787 1788 /* Nothing to reconfigure, when called from fbcon */ 1789 if (user) { 1790 console_lock(); 1791 sh_mobile_fb_reconfig(info); 1792 console_unlock(); 1793 } 1794 1795 mutex_unlock(&ch->open_lock); 1796 1797 return 0; 1798} 1799 1800static int sh_mobile_lcdc_open(struct fb_info *info, int user) 1801{ 1802 struct sh_mobile_lcdc_chan *ch = info->par; 1803 1804 mutex_lock(&ch->open_lock); 1805 ch->use_count++; 1806 1807 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count); 1808 mutex_unlock(&ch->open_lock); 1809 1810 return 0; 1811} 1812 1813static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var, 1814 struct fb_info *info) 1815{ 1816 struct sh_mobile_lcdc_chan *ch = info->par; 1817 struct sh_mobile_lcdc_priv *p = ch->lcdc; 1818 unsigned int best_dist = (unsigned int)-1; 1819 unsigned int best_xres = 0; 1820 unsigned int best_yres = 0; 1821 unsigned int i; 1822 int ret; 1823 1824 /* If board code provides us with a list of available modes, make sure 1825 * we use one of them. Find the mode closest to the requested one. The 1826 * distance between two modes is defined as the size of the 1827 * non-overlapping parts of the two rectangles. 1828 */ 1829 for (i = 0; i < ch->cfg->num_modes; ++i) { 1830 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i]; 1831 unsigned int dist; 1832 1833 /* We can only round up. */ 1834 if (var->xres > mode->xres || var->yres > mode->yres) 1835 continue; 1836 1837 dist = var->xres * var->yres + mode->xres * mode->yres 1838 - 2 * min(var->xres, mode->xres) 1839 * min(var->yres, mode->yres); 1840 1841 if (dist < best_dist) { 1842 best_xres = mode->xres; 1843 best_yres = mode->yres; 1844 best_dist = dist; 1845 } 1846 } 1847 1848 /* If no available mode can be used, return an error. */ 1849 if (ch->cfg->num_modes != 0) { 1850 if (best_dist == (unsigned int)-1) 1851 return -EINVAL; 1852 1853 var->xres = best_xres; 1854 var->yres = best_yres; 1855 } 1856 1857 ret = __sh_mobile_lcdc_check_var(var, info); 1858 if (ret < 0) 1859 return ret; 1860 1861 /* only accept the forced_fourcc for dual channel configurations */ 1862 if (p->forced_fourcc && 1863 p->forced_fourcc != sh_mobile_format_fourcc(var)) 1864 return -EINVAL; 1865 1866 return 0; 1867} 1868 1869static int sh_mobile_lcdc_set_par(struct fb_info *info) 1870{ 1871 struct sh_mobile_lcdc_chan *ch = info->par; 1872 int ret; 1873 1874 sh_mobile_lcdc_stop(ch->lcdc); 1875 1876 ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var)); 1877 ch->colorspace = info->var.colorspace; 1878 1879 ch->xres = info->var.xres; 1880 ch->xres_virtual = info->var.xres_virtual; 1881 ch->yres = info->var.yres; 1882 ch->yres_virtual = info->var.yres_virtual; 1883 1884 if (ch->format->yuv) 1885 ch->pitch = info->var.xres_virtual; 1886 else 1887 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8; 1888 1889 ret = sh_mobile_lcdc_start(ch->lcdc); 1890 if (ret < 0) 1891 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__); 1892 1893 info->fix.line_length = ch->pitch; 1894 1895 if (sh_mobile_format_is_fourcc(&info->var)) { 1896 info->fix.type = FB_TYPE_FOURCC; 1897 info->fix.visual = FB_VISUAL_FOURCC; 1898 } else { 1899 info->fix.type = FB_TYPE_PACKED_PIXELS; 1900 info->fix.visual = FB_VISUAL_TRUECOLOR; 1901 } 1902 1903 return ret; 1904} 1905 1906/* 1907 * Screen blanking. Behavior is as follows: 1908 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled 1909 * FB_BLANK_NORMAL: screen blanked, clocks enabled 1910 * FB_BLANK_VSYNC, 1911 * FB_BLANK_HSYNC, 1912 * FB_BLANK_POWEROFF: screen blanked, clocks disabled 1913 */ 1914static int sh_mobile_lcdc_blank(int blank, struct fb_info *info) 1915{ 1916 struct sh_mobile_lcdc_chan *ch = info->par; 1917 struct sh_mobile_lcdc_priv *p = ch->lcdc; 1918 1919 /* blank the screen? */ 1920 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) { 1921 struct fb_fillrect rect = { 1922 .width = ch->xres, 1923 .height = ch->yres, 1924 }; 1925 sh_mobile_lcdc_fillrect(info, &rect); 1926 } 1927 /* turn clocks on? */ 1928 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) { 1929 sh_mobile_lcdc_clk_on(p); 1930 } 1931 /* turn clocks off? */ 1932 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) { 1933 /* make sure the screen is updated with the black fill before 1934 * switching the clocks off. one vsync is not enough since 1935 * blanking may occur in the middle of a refresh. deferred io 1936 * mode will reenable the clocks and update the screen in time, 1937 * so it does not need this. */ 1938 if (!info->fbdefio) { 1939 sh_mobile_lcdc_wait_for_vsync(ch); 1940 sh_mobile_lcdc_wait_for_vsync(ch); 1941 } 1942 sh_mobile_lcdc_clk_off(p); 1943 } 1944 1945 ch->blank_status = blank; 1946 return 0; 1947} 1948 1949static int 1950sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma) 1951{ 1952 struct sh_mobile_lcdc_chan *ch = info->par; 1953 1954 if (info->fbdefio) 1955 return fb_deferred_io_mmap(info, vma); 1956 1957 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); 1958 1959 return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem, 1960 ch->dma_handle, ch->fb_size); 1961} 1962 1963static const struct fb_ops sh_mobile_lcdc_ops = { 1964 .owner = THIS_MODULE, 1965 .fb_setcolreg = sh_mobile_lcdc_setcolreg, 1966 __FB_DEFAULT_DMAMEM_OPS_RDWR, 1967 .fb_fillrect = sh_mobile_lcdc_fillrect, 1968 .fb_copyarea = sh_mobile_lcdc_copyarea, 1969 .fb_imageblit = sh_mobile_lcdc_imageblit, 1970 .fb_blank = sh_mobile_lcdc_blank, 1971 .fb_pan_display = sh_mobile_lcdc_pan, 1972 .fb_ioctl = sh_mobile_lcdc_ioctl, 1973 .fb_open = sh_mobile_lcdc_open, 1974 .fb_release = sh_mobile_lcdc_release, 1975 .fb_check_var = sh_mobile_lcdc_check_var, 1976 .fb_set_par = sh_mobile_lcdc_set_par, 1977 .fb_mmap = sh_mobile_lcdc_mmap, 1978}; 1979 1980static void 1981sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch) 1982{ 1983 if (ch->info && ch->info->dev) 1984 unregister_framebuffer(ch->info); 1985} 1986 1987static int 1988sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch) 1989{ 1990 struct fb_info *info = ch->info; 1991 int ret; 1992 1993 if (info->fbdefio) { 1994 ch->sglist = vmalloc(sizeof(struct scatterlist) * 1995 ch->fb_size >> PAGE_SHIFT); 1996 if (!ch->sglist) 1997 return -ENOMEM; 1998 } 1999 2000 info->bl_dev = ch->bl; 2001 2002 ret = register_framebuffer(info); 2003 if (ret < 0) 2004 return ret; 2005 2006 dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n", 2007 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ? 2008 "mainlcd" : "sublcd", info->var.xres, info->var.yres, 2009 info->var.bits_per_pixel); 2010 2011 /* deferred io mode: disable clock to save power */ 2012 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED) 2013 sh_mobile_lcdc_clk_off(ch->lcdc); 2014 2015 return ret; 2016} 2017 2018static void 2019sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch) 2020{ 2021 struct fb_info *info = ch->info; 2022 2023 if (!info || !info->device) 2024 return; 2025 2026 vfree(ch->sglist); 2027 2028 fb_dealloc_cmap(&info->cmap); 2029 framebuffer_release(info); 2030} 2031 2032static int 2033sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch, 2034 const struct fb_videomode *modes, 2035 unsigned int num_modes) 2036{ 2037 struct sh_mobile_lcdc_priv *priv = ch->lcdc; 2038 struct fb_var_screeninfo *var; 2039 struct fb_info *info; 2040 int ret; 2041 2042 /* Allocate and initialize the frame buffer device. Create the modes 2043 * list and allocate the color map. 2044 */ 2045 info = framebuffer_alloc(0, priv->dev); 2046 if (!info) 2047 return -ENOMEM; 2048 2049 ch->info = info; 2050 2051 info->fbops = &sh_mobile_lcdc_ops; 2052 info->device = priv->dev; 2053 info->flags |= FBINFO_VIRTFB; 2054 info->screen_buffer = ch->fb_mem; 2055 info->pseudo_palette = &ch->pseudo_palette; 2056 info->par = ch; 2057 2058 fb_videomode_to_modelist(modes, num_modes, &info->modelist); 2059 2060 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0); 2061 if (ret < 0) { 2062 dev_err(priv->dev, "unable to allocate cmap\n"); 2063 return ret; 2064 } 2065 2066 /* Initialize fixed screen information. Restrict pan to 2 lines steps 2067 * for NV12 and NV21. 2068 */ 2069 info->fix = sh_mobile_lcdc_fix; 2070 info->fix.smem_start = ch->dma_handle; 2071 info->fix.smem_len = ch->fb_size; 2072 info->fix.line_length = ch->pitch; 2073 2074 if (ch->format->yuv) 2075 info->fix.visual = FB_VISUAL_FOURCC; 2076 else 2077 info->fix.visual = FB_VISUAL_TRUECOLOR; 2078 2079 switch (ch->format->fourcc) { 2080 case V4L2_PIX_FMT_NV12: 2081 case V4L2_PIX_FMT_NV21: 2082 info->fix.ypanstep = 2; 2083 fallthrough; 2084 case V4L2_PIX_FMT_NV16: 2085 case V4L2_PIX_FMT_NV61: 2086 info->fix.xpanstep = 2; 2087 } 2088 2089 /* Initialize variable screen information using the first mode as 2090 * default. 2091 */ 2092 var = &info->var; 2093 fb_videomode_to_var(var, modes); 2094 var->width = ch->display.width; 2095 var->height = ch->display.height; 2096 var->xres_virtual = ch->xres_virtual; 2097 var->yres_virtual = ch->yres_virtual; 2098 var->activate = FB_ACTIVATE_NOW; 2099 2100 /* Use the legacy API by default for RGB formats, and the FOURCC API 2101 * for YUV formats. 2102 */ 2103 if (!ch->format->yuv) 2104 var->bits_per_pixel = ch->format->bpp; 2105 else 2106 var->grayscale = ch->format->fourcc; 2107 2108 ret = sh_mobile_lcdc_check_var(var, info); 2109 if (ret) 2110 return ret; 2111 2112 return 0; 2113} 2114 2115/* ----------------------------------------------------------------------------- 2116 * Backlight 2117 */ 2118 2119static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev) 2120{ 2121 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev); 2122 int brightness = backlight_get_brightness(bdev); 2123 2124 ch->bl_brightness = brightness; 2125 return ch->cfg->bl_info.set_brightness(brightness); 2126} 2127 2128static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev) 2129{ 2130 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev); 2131 2132 return ch->bl_brightness; 2133} 2134 2135static const struct backlight_ops sh_mobile_lcdc_bl_ops = { 2136 .options = BL_CORE_SUSPENDRESUME, 2137 .update_status = sh_mobile_lcdc_update_bl, 2138 .get_brightness = sh_mobile_lcdc_get_brightness, 2139}; 2140 2141static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent, 2142 struct sh_mobile_lcdc_chan *ch) 2143{ 2144 struct backlight_device *bl; 2145 2146 bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch, 2147 &sh_mobile_lcdc_bl_ops, NULL); 2148 if (IS_ERR(bl)) { 2149 dev_err(parent, "unable to register backlight device: %ld\n", 2150 PTR_ERR(bl)); 2151 return NULL; 2152 } 2153 2154 bl->props.max_brightness = ch->cfg->bl_info.max_brightness; 2155 bl->props.brightness = bl->props.max_brightness; 2156 backlight_update_status(bl); 2157 2158 return bl; 2159} 2160 2161static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev) 2162{ 2163 backlight_device_unregister(bdev); 2164} 2165 2166/* ----------------------------------------------------------------------------- 2167 * Power management 2168 */ 2169 2170static int sh_mobile_lcdc_suspend(struct device *dev) 2171{ 2172 struct platform_device *pdev = to_platform_device(dev); 2173 2174 sh_mobile_lcdc_stop(platform_get_drvdata(pdev)); 2175 return 0; 2176} 2177 2178static int sh_mobile_lcdc_resume(struct device *dev) 2179{ 2180 struct platform_device *pdev = to_platform_device(dev); 2181 2182 return sh_mobile_lcdc_start(platform_get_drvdata(pdev)); 2183} 2184 2185static int sh_mobile_lcdc_runtime_suspend(struct device *dev) 2186{ 2187 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev); 2188 2189 /* turn off LCDC hardware */ 2190 lcdc_write(priv, _LDCNT1R, 0); 2191 2192 return 0; 2193} 2194 2195static int sh_mobile_lcdc_runtime_resume(struct device *dev) 2196{ 2197 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev); 2198 2199 __sh_mobile_lcdc_start(priv); 2200 2201 return 0; 2202} 2203 2204static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = { 2205 .suspend = sh_mobile_lcdc_suspend, 2206 .resume = sh_mobile_lcdc_resume, 2207 .runtime_suspend = sh_mobile_lcdc_runtime_suspend, 2208 .runtime_resume = sh_mobile_lcdc_runtime_resume, 2209}; 2210 2211/* ----------------------------------------------------------------------------- 2212 * Framebuffer notifier 2213 */ 2214 2215/* ----------------------------------------------------------------------------- 2216 * Probe/remove and driver init/exit 2217 */ 2218 2219static const struct fb_videomode default_720p = { 2220 .name = "HDMI 720p", 2221 .xres = 1280, 2222 .yres = 720, 2223 2224 .left_margin = 220, 2225 .right_margin = 110, 2226 .hsync_len = 40, 2227 2228 .upper_margin = 20, 2229 .lower_margin = 5, 2230 .vsync_len = 5, 2231 2232 .pixclock = 13468, 2233 .refresh = 60, 2234 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT, 2235}; 2236 2237static void sh_mobile_lcdc_remove(struct platform_device *pdev) 2238{ 2239 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev); 2240 unsigned int i; 2241 2242 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) 2243 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]); 2244 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) 2245 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]); 2246 2247 sh_mobile_lcdc_stop(priv); 2248 2249 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) { 2250 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2251 2252 sh_mobile_lcdc_overlay_fb_cleanup(ovl); 2253 2254 if (ovl->fb_mem) 2255 dma_free_coherent(&pdev->dev, ovl->fb_size, 2256 ovl->fb_mem, ovl->dma_handle); 2257 } 2258 2259 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { 2260 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2261 2262 if (ch->tx_dev) { 2263 ch->tx_dev->lcdc = NULL; 2264 module_put(ch->cfg->tx_dev->dev.driver->owner); 2265 } 2266 2267 sh_mobile_lcdc_channel_fb_cleanup(ch); 2268 2269 if (ch->fb_mem) 2270 dma_free_coherent(&pdev->dev, ch->fb_size, 2271 ch->fb_mem, ch->dma_handle); 2272 } 2273 2274 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { 2275 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2276 2277 if (ch->bl) 2278 sh_mobile_lcdc_bl_remove(ch->bl); 2279 mutex_destroy(&ch->open_lock); 2280 } 2281 2282 if (priv->dot_clk) { 2283 pm_runtime_disable(&pdev->dev); 2284 clk_put(priv->dot_clk); 2285 } 2286 2287 if (priv->base) 2288 iounmap(priv->base); 2289 2290 if (priv->irq) 2291 free_irq(priv->irq, priv); 2292 kfree(priv); 2293} 2294 2295static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch) 2296{ 2297 int interface_type = ch->cfg->interface_type; 2298 2299 switch (interface_type) { 2300 case RGB8: 2301 case RGB9: 2302 case RGB12A: 2303 case RGB12B: 2304 case RGB16: 2305 case RGB18: 2306 case RGB24: 2307 case SYS8A: 2308 case SYS8B: 2309 case SYS8C: 2310 case SYS8D: 2311 case SYS9: 2312 case SYS12: 2313 case SYS16A: 2314 case SYS16B: 2315 case SYS16C: 2316 case SYS18: 2317 case SYS24: 2318 break; 2319 default: 2320 return -EINVAL; 2321 } 2322 2323 /* SUBLCD only supports SYS interface */ 2324 if (lcdc_chan_is_sublcd(ch)) { 2325 if (!(interface_type & LDMT1R_IFM)) 2326 return -EINVAL; 2327 2328 interface_type &= ~LDMT1R_IFM; 2329 } 2330 2331 ch->ldmt1r_value = interface_type; 2332 return 0; 2333} 2334 2335static int 2336sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl) 2337{ 2338 const struct sh_mobile_lcdc_format_info *format; 2339 struct device *dev = ovl->channel->lcdc->dev; 2340 int ret; 2341 2342 if (ovl->cfg->fourcc == 0) 2343 return 0; 2344 2345 /* Validate the format. */ 2346 format = sh_mobile_format_info(ovl->cfg->fourcc); 2347 if (format == NULL) { 2348 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc); 2349 return -EINVAL; 2350 } 2351 2352 ovl->enabled = false; 2353 ovl->mode = LCDC_OVERLAY_BLEND; 2354 ovl->alpha = 255; 2355 ovl->rop3 = 0; 2356 ovl->pos_x = 0; 2357 ovl->pos_y = 0; 2358 2359 /* The default Y virtual resolution is twice the panel size to allow for 2360 * double-buffering. 2361 */ 2362 ovl->format = format; 2363 ovl->xres = ovl->cfg->max_xres; 2364 ovl->xres_virtual = ovl->xres; 2365 ovl->yres = ovl->cfg->max_yres; 2366 ovl->yres_virtual = ovl->yres * 2; 2367 2368 if (!format->yuv) 2369 ovl->pitch = ovl->xres_virtual * format->bpp / 8; 2370 else 2371 ovl->pitch = ovl->xres_virtual; 2372 2373 /* Allocate frame buffer memory. */ 2374 ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres 2375 * format->bpp / 8 * 2; 2376 ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle, 2377 GFP_KERNEL); 2378 if (!ovl->fb_mem) { 2379 dev_err(dev, "unable to allocate buffer\n"); 2380 return -ENOMEM; 2381 } 2382 2383 ret = sh_mobile_lcdc_overlay_fb_init(ovl); 2384 if (ret < 0) 2385 return ret; 2386 2387 return 0; 2388} 2389 2390static int 2391sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch) 2392{ 2393 const struct sh_mobile_lcdc_format_info *format; 2394 const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg; 2395 struct device *dev = ch->lcdc->dev; 2396 const struct fb_videomode *max_mode; 2397 const struct fb_videomode *mode; 2398 unsigned int num_modes; 2399 unsigned int max_size; 2400 unsigned int i; 2401 2402 /* Validate the format. */ 2403 format = sh_mobile_format_info(cfg->fourcc); 2404 if (format == NULL) { 2405 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc); 2406 return -EINVAL; 2407 } 2408 2409 /* Iterate through the modes to validate them and find the highest 2410 * resolution. 2411 */ 2412 max_mode = NULL; 2413 max_size = 0; 2414 2415 for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) { 2416 unsigned int size = mode->yres * mode->xres; 2417 2418 /* NV12/NV21 buffers must have even number of lines */ 2419 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 || 2420 cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) { 2421 dev_err(dev, "yres must be multiple of 2 for " 2422 "YCbCr420 mode.\n"); 2423 return -EINVAL; 2424 } 2425 2426 if (size > max_size) { 2427 max_mode = mode; 2428 max_size = size; 2429 } 2430 } 2431 2432 if (!max_size) 2433 max_size = MAX_XRES * MAX_YRES; 2434 else 2435 dev_dbg(dev, "Found largest videomode %ux%u\n", 2436 max_mode->xres, max_mode->yres); 2437 2438 if (cfg->lcd_modes == NULL) { 2439 mode = &default_720p; 2440 num_modes = 1; 2441 } else { 2442 mode = cfg->lcd_modes; 2443 num_modes = cfg->num_modes; 2444 } 2445 2446 /* Use the first mode as default. The default Y virtual resolution is 2447 * twice the panel size to allow for double-buffering. 2448 */ 2449 ch->format = format; 2450 ch->xres = mode->xres; 2451 ch->xres_virtual = mode->xres; 2452 ch->yres = mode->yres; 2453 ch->yres_virtual = mode->yres * 2; 2454 2455 if (!format->yuv) { 2456 ch->colorspace = V4L2_COLORSPACE_SRGB; 2457 ch->pitch = ch->xres_virtual * format->bpp / 8; 2458 } else { 2459 ch->colorspace = V4L2_COLORSPACE_REC709; 2460 ch->pitch = ch->xres_virtual; 2461 } 2462 2463 ch->display.width = cfg->panel_cfg.width; 2464 ch->display.height = cfg->panel_cfg.height; 2465 ch->display.mode = *mode; 2466 2467 /* Allocate frame buffer memory. */ 2468 ch->fb_size = max_size * format->bpp / 8 * 2; 2469 ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle, 2470 GFP_KERNEL); 2471 if (ch->fb_mem == NULL) { 2472 dev_err(dev, "unable to allocate buffer\n"); 2473 return -ENOMEM; 2474 } 2475 2476 /* Initialize the transmitter device if present. */ 2477 if (cfg->tx_dev) { 2478 if (!cfg->tx_dev->dev.driver || 2479 !try_module_get(cfg->tx_dev->dev.driver->owner)) { 2480 dev_warn(dev, "unable to get transmitter device\n"); 2481 return -EINVAL; 2482 } 2483 ch->tx_dev = platform_get_drvdata(cfg->tx_dev); 2484 ch->tx_dev->lcdc = ch; 2485 ch->tx_dev->def_mode = *mode; 2486 } 2487 2488 return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes); 2489} 2490 2491static int sh_mobile_lcdc_probe(struct platform_device *pdev) 2492{ 2493 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data; 2494 struct sh_mobile_lcdc_priv *priv; 2495 struct resource *res; 2496 int num_channels; 2497 int error; 2498 int irq, i; 2499 2500 if (!pdata) { 2501 dev_err(&pdev->dev, "no platform data defined\n"); 2502 return -EINVAL; 2503 } 2504 2505 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2506 irq = platform_get_irq(pdev, 0); 2507 if (!res || irq < 0) { 2508 dev_err(&pdev->dev, "cannot get platform resources\n"); 2509 return -ENOENT; 2510 } 2511 2512 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 2513 if (!priv) 2514 return -ENOMEM; 2515 2516 priv->dev = &pdev->dev; 2517 2518 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) 2519 mutex_init(&priv->ch[i].open_lock); 2520 platform_set_drvdata(pdev, priv); 2521 2522 error = request_irq(irq, sh_mobile_lcdc_irq, 0, 2523 dev_name(&pdev->dev), priv); 2524 if (error) { 2525 dev_err(&pdev->dev, "unable to request irq\n"); 2526 goto err1; 2527 } 2528 2529 priv->irq = irq; 2530 atomic_set(&priv->hw_usecnt, -1); 2531 2532 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) { 2533 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels; 2534 2535 ch->lcdc = priv; 2536 ch->cfg = &pdata->ch[i]; 2537 2538 error = sh_mobile_lcdc_check_interface(ch); 2539 if (error) { 2540 dev_err(&pdev->dev, "unsupported interface type\n"); 2541 goto err1; 2542 } 2543 init_waitqueue_head(&ch->frame_end_wait); 2544 init_completion(&ch->vsync_completion); 2545 2546 /* probe the backlight is there is one defined */ 2547 if (ch->cfg->bl_info.max_brightness) 2548 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch); 2549 2550 switch (pdata->ch[i].chan) { 2551 case LCDC_CHAN_MAINLCD: 2552 ch->enabled = LDCNT2R_ME; 2553 ch->reg_offs = lcdc_offs_mainlcd; 2554 num_channels++; 2555 break; 2556 case LCDC_CHAN_SUBLCD: 2557 ch->enabled = LDCNT2R_SE; 2558 ch->reg_offs = lcdc_offs_sublcd; 2559 num_channels++; 2560 break; 2561 } 2562 } 2563 2564 if (!num_channels) { 2565 dev_err(&pdev->dev, "no channels defined\n"); 2566 error = -EINVAL; 2567 goto err1; 2568 } 2569 2570 /* for dual channel LCDC (MAIN + SUB) force shared format setting */ 2571 if (num_channels == 2) 2572 priv->forced_fourcc = pdata->ch[0].fourcc; 2573 2574 priv->base = ioremap(res->start, resource_size(res)); 2575 if (!priv->base) { 2576 error = -ENOMEM; 2577 goto err1; 2578 } 2579 2580 error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source); 2581 if (error) { 2582 dev_err(&pdev->dev, "unable to setup clocks\n"); 2583 goto err1; 2584 } 2585 2586 /* Enable runtime PM. */ 2587 pm_runtime_enable(&pdev->dev); 2588 2589 for (i = 0; i < num_channels; i++) { 2590 struct sh_mobile_lcdc_chan *ch = &priv->ch[i]; 2591 2592 error = sh_mobile_lcdc_channel_init(ch); 2593 if (error) 2594 goto err1; 2595 } 2596 2597 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) { 2598 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2599 2600 ovl->cfg = &pdata->overlays[i]; 2601 ovl->channel = &priv->ch[0]; 2602 2603 error = sh_mobile_lcdc_overlay_init(ovl); 2604 if (error) 2605 goto err1; 2606 } 2607 2608 error = sh_mobile_lcdc_start(priv); 2609 if (error) { 2610 dev_err(&pdev->dev, "unable to start hardware\n"); 2611 goto err1; 2612 } 2613 2614 for (i = 0; i < num_channels; i++) { 2615 struct sh_mobile_lcdc_chan *ch = priv->ch + i; 2616 2617 error = sh_mobile_lcdc_channel_fb_register(ch); 2618 if (error) 2619 goto err1; 2620 } 2621 2622 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) { 2623 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i]; 2624 2625 error = sh_mobile_lcdc_overlay_fb_register(ovl); 2626 if (error) 2627 goto err1; 2628 } 2629 2630 return 0; 2631err1: 2632 sh_mobile_lcdc_remove(pdev); 2633 2634 return error; 2635} 2636 2637static struct platform_driver sh_mobile_lcdc_driver = { 2638 .driver = { 2639 .name = "sh_mobile_lcdc_fb", 2640 .dev_groups = overlay_sysfs_groups, 2641 .pm = &sh_mobile_lcdc_dev_pm_ops, 2642 }, 2643 .probe = sh_mobile_lcdc_probe, 2644 .remove = sh_mobile_lcdc_remove, 2645}; 2646 2647module_platform_driver(sh_mobile_lcdc_driver); 2648 2649MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver"); 2650MODULE_AUTHOR("Magnus Damm <damm@opensource.se>"); 2651MODULE_LICENSE("GPL v2");
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