drivers/video/msm/mdp.c

   1 /* drivers/video/msm_fb/mdp.c
   2  *
   3  * MSM MDP Interface (used by framebuffer core)
   4  *
   5  * Copyright (C) 2007 QUALCOMM Incorporated
   6  * Copyright (C) 2007 Google Incorporated
   7  *
   8  * This software is licensed under the terms of the GNU General Public
   9  * License version 2, as published by the Free Software Foundation, and
  10  * may be copied, distributed, and modified under those terms.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/fb.h>
  20 #include <linux/msm_mdp.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/wait.h>
  23 #include <linux/clk.h>
  24 #include <linux/file.h>
  25 #include <linux/major.h>
  26 #include <linux/slab.h>
  27
  28 #include <mach/msm_iomap.h>
  29 #include <mach/msm_fb.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/export.h>
  32
  33 #include "mdp_hw.h"
  34
  35 struct class *mdp_class;
  36
  37 #define MDP_CMD_DEBUG_ACCESS_BASE (0x10000)
  38
  39 static uint16_t mdp_default_ccs[] = {
  40         0x254, 0x000, 0x331, 0x254, 0xF38, 0xE61, 0x254, 0x409, 0x000,
  41         0x010, 0x080, 0x080
  42 };
  43
  44 static DECLARE_WAIT_QUEUE_HEAD(mdp_dma2_waitqueue);
  45 static DECLARE_WAIT_QUEUE_HEAD(mdp_ppp_waitqueue);
  46 static struct msmfb_callback *dma_callback;
  47 static struct clk *clk;
  48 static unsigned int mdp_irq_mask;
  49 static DEFINE_SPINLOCK(mdp_lock);
  50 DEFINE_MUTEX(mdp_mutex);
  51
  52 static int enable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
  53 {
  54         unsigned long irq_flags;
  55         int ret = 0;
  56
  57         BUG_ON(!mask);
  58
  59         spin_lock_irqsave(&mdp_lock, irq_flags);
  60         /* if the mask bits are already set return an error, this interrupt
  61          * is already enabled */
  62         if (mdp_irq_mask & mask) {
  63                 printk(KERN_ERR "mdp irq already on already on %x %x\n",
  64                        mdp_irq_mask, mask);
  65                 ret = -1;
  66         }
  67         /* if the mdp irq is not already enabled enable it */
  68         if (!mdp_irq_mask) {
  69                 if (clk)
  70                         clk_enable(clk);
  71                 enable_irq(mdp->irq);
  72         }
  73
  74         /* update the irq mask to reflect the fact that the interrupt is
  75          * enabled */
  76         mdp_irq_mask |= mask;
  77         spin_unlock_irqrestore(&mdp_lock, irq_flags);
  78         return ret;
  79 }
  80
  81 static int locked_disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
  82 {
  83         /* this interrupt is already disabled! */
  84         if (!(mdp_irq_mask & mask)) {
  85                 printk(KERN_ERR "mdp irq already off %x %x\n",
  86                        mdp_irq_mask, mask);
  87                 return -1;
  88         }
  89         /* update the irq mask to reflect the fact that the interrupt is
  90          * disabled */
  91         mdp_irq_mask &= ~(mask);
  92         /* if no one is waiting on the interrupt, disable it */
  93         if (!mdp_irq_mask) {
  94                 disable_irq_nosync(mdp->irq);
  95                 if (clk)
  96                         clk_disable(clk);
  97         }
  98         return 0;
  99 }
 100
 101 static int disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
 102 {
 103         unsigned long irq_flags;
 104         int ret;
 105
 106         spin_lock_irqsave(&mdp_lock, irq_flags);
 107         ret = locked_disable_mdp_irq(mdp, mask);
 108         spin_unlock_irqrestore(&mdp_lock, irq_flags);
 109         return ret;
 110 }
 111
 112 static irqreturn_t mdp_isr(int irq, void *data)
 113 {
 114         uint32_t status;
 115         unsigned long irq_flags;
 116         struct mdp_info *mdp = data;
 117
 118         spin_lock_irqsave(&mdp_lock, irq_flags);
 119
 120         status = mdp_readl(mdp, MDP_INTR_STATUS);
 121         mdp_writel(mdp, status, MDP_INTR_CLEAR);
 122
 123         status &= mdp_irq_mask;
 124         if (status & DL0_DMA2_TERM_DONE) {
 125                 if (dma_callback) {
 126                         dma_callback->func(dma_callback);
 127                         dma_callback = NULL;
 128                 }
 129                 wake_up(&mdp_dma2_waitqueue);
 130         }
 131
 132         if (status & DL0_ROI_DONE)
 133                 wake_up(&mdp_ppp_waitqueue);
 134
 135         if (status)
 136                 locked_disable_mdp_irq(mdp, status);
 137
 138         spin_unlock_irqrestore(&mdp_lock, irq_flags);
 139         return IRQ_HANDLED;
 140 }
 141
 142 static uint32_t mdp_check_mask(uint32_t mask)
 143 {
 144         uint32_t ret;
 145         unsigned long irq_flags;
 146
 147         spin_lock_irqsave(&mdp_lock, irq_flags);
 148         ret = mdp_irq_mask & mask;
 149         spin_unlock_irqrestore(&mdp_lock, irq_flags);
 150         return ret;
 151 }
 152
 153 static int mdp_wait(struct mdp_info *mdp, uint32_t mask, wait_queue_head_t *wq)
 154 {
 155         int ret = 0;
 156         unsigned long irq_flags;
 157
 158         wait_event_timeout(*wq, !mdp_check_mask(mask), HZ);
 159
 160         spin_lock_irqsave(&mdp_lock, irq_flags);
 161         if (mdp_irq_mask & mask) {
 162                 locked_disable_mdp_irq(mdp, mask);
 163                 printk(KERN_WARNING "timeout waiting for mdp to complete %x\n",
 164                        mask);
 165                 ret = -ETIMEDOUT;
 166         }
 167         spin_unlock_irqrestore(&mdp_lock, irq_flags);
 168
 169         return ret;
 170 }
 171
 172 void mdp_dma_wait(struct mdp_device *mdp_dev)
 173 {
 174 #define MDP_MAX_TIMEOUTS 20
 175         static int timeout_count;
 176         struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 177
 178         if (mdp_wait(mdp, DL0_DMA2_TERM_DONE, &mdp_dma2_waitqueue) == -ETIMEDOUT)
 179                 timeout_count++;
 180         else
 181                 timeout_count = 0;
 182
 183         if (timeout_count > MDP_MAX_TIMEOUTS) {
 184                 printk(KERN_ERR "mdp: dma failed %d times, somethings wrong!\n",
 185                        MDP_MAX_TIMEOUTS);
 186                 BUG();
 187         }
 188 }
 189
 190 static int mdp_ppp_wait(struct mdp_info *mdp)
 191 {
 192         return mdp_wait(mdp, DL0_ROI_DONE, &mdp_ppp_waitqueue);
 193 }
 194
 195 void mdp_dma_to_mddi(struct mdp_info *mdp, uint32_t addr, uint32_t stride,
 196                      uint32_t width, uint32_t height, uint32_t x, uint32_t y,
 197                      struct msmfb_callback *callback)
 198 {
 199         uint32_t dma2_cfg;
 200         uint16_t ld_param = 0; /* 0=PRIM, 1=SECD, 2=EXT */
 201
 202         if (enable_mdp_irq(mdp, DL0_DMA2_TERM_DONE)) {
 203                 printk(KERN_ERR "mdp_dma_to_mddi: busy\n");
 204                 return;
 205         }
 206
 207         dma_callback = callback;
 208
 209         dma2_cfg = DMA_PACK_TIGHT |
 210                 DMA_PACK_ALIGN_LSB |
 211                 DMA_PACK_PATTERN_RGB |
 212                 DMA_OUT_SEL_AHB |
 213                 DMA_IBUF_NONCONTIGUOUS;
 214
 215         dma2_cfg |= DMA_IBUF_FORMAT_RGB565;
 216
 217         dma2_cfg |= DMA_OUT_SEL_MDDI;
 218
 219         dma2_cfg |= DMA_MDDI_DMAOUT_LCD_SEL_PRIMARY;
 220
 221         dma2_cfg |= DMA_DITHER_EN;
 222
 223         /* setup size, address, and stride */
 224         mdp_writel(mdp, (height << 16) | (width),
 225                    MDP_CMD_DEBUG_ACCESS_BASE + 0x0184);
 226         mdp_writel(mdp, addr, MDP_CMD_DEBUG_ACCESS_BASE + 0x0188);
 227         mdp_writel(mdp, stride, MDP_CMD_DEBUG_ACCESS_BASE + 0x018C);
 228
 229         /* 666 18BPP */
 230         dma2_cfg |= DMA_DSTC0G_6BITS | DMA_DSTC1B_6BITS | DMA_DSTC2R_6BITS;
 231
 232         /* set y & x offset and MDDI transaction parameters */
 233         mdp_writel(mdp, (y << 16) | (x), MDP_CMD_DEBUG_ACCESS_BASE + 0x0194);
 234         mdp_writel(mdp, ld_param, MDP_CMD_DEBUG_ACCESS_BASE + 0x01a0);
 235         mdp_writel(mdp, (MDDI_VDO_PACKET_DESC << 16) | MDDI_VDO_PACKET_PRIM,
 236                    MDP_CMD_DEBUG_ACCESS_BASE + 0x01a4);
 237
 238         mdp_writel(mdp, dma2_cfg, MDP_CMD_DEBUG_ACCESS_BASE + 0x0180);
 239
 240         /* start DMA2 */
 241         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0044);
 242 }
 243
 244 void mdp_dma(struct mdp_device *mdp_dev, uint32_t addr, uint32_t stride,
 245              uint32_t width, uint32_t height, uint32_t x, uint32_t y,
 246              struct msmfb_callback *callback, int interface)
 247 {
 248         struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 249
 250         if (interface == MSM_MDDI_PMDH_INTERFACE) {
 251                 mdp_dma_to_mddi(mdp, addr, stride, width, height, x, y,
 252                                 callback);
 253         }
 254 }
 255
 256 int get_img(struct mdp_img *img, struct fb_info *info,
 257             unsigned long *start, unsigned long *len,
 258             struct file **filep)
 259 {
 260         int ret = 0;
 261         struct fd f = fdget(img->memory_id);
 262         if (f.file == NULL)
 263                 return -1;
 264
 265         if (MAJOR(f.file->f_dentry->d_inode->i_rdev) == FB_MAJOR) {
 266                 *start = info->fix.smem_start;
 267                 *len = info->fix.smem_len;
 268         } else
 269                 ret = -1;
 270         fdput(f);
 271
 272         return ret;
 273 }
 274
 275 void put_img(struct file *src_file, struct file *dst_file)
 276 {
 277 }
 278
 279 int mdp_blit(struct mdp_device *mdp_dev, struct fb_info *fb,
 280              struct mdp_blit_req *req)
 281 {
 282         int ret;
 283         unsigned long src_start = 0, src_len = 0, dst_start = 0, dst_len = 0;
 284         struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 285         struct file *src_file = 0, *dst_file = 0;
 286
 287         /* WORKAROUND FOR HARDWARE BUG IN BG TILE FETCH */
 288         if (unlikely(req->src_rect.h == 0 ||
 289                      req->src_rect.w == 0)) {
 290                 printk(KERN_ERR "mpd_ppp: src img of zero size!\n");
 291                 return -EINVAL;
 292         }
 293         if (unlikely(req->dst_rect.h == 0 ||
 294                      req->dst_rect.w == 0))
 295                 return -EINVAL;
 296
 297         /* do this first so that if this fails, the caller can always
 298          * safely call put_img */
 299         if (unlikely(get_img(&req->src, fb, &src_start, &src_len, &src_file))) {
 300                 printk(KERN_ERR "mpd_ppp: could not retrieve src image from "
 301                                 "memory\n");
 302                 return -EINVAL;
 303         }
 304
 305         if (unlikely(get_img(&req->dst, fb, &dst_start, &dst_len, &dst_file))) {
 306                 printk(KERN_ERR "mpd_ppp: could not retrieve dst image from "
 307                                 "memory\n");
 308                 return -EINVAL;
 309         }
 310         mutex_lock(&mdp_mutex);
 311
 312         /* transp_masking unimplemented */
 313         req->transp_mask = MDP_TRANSP_NOP;
 314         if (unlikely((req->transp_mask != MDP_TRANSP_NOP ||
 315                       req->alpha != MDP_ALPHA_NOP ||
 316                       HAS_ALPHA(req->src.format)) &&
 317                      (req->flags & MDP_ROT_90 &&
 318                       req->dst_rect.w <= 16 && req->dst_rect.h >= 16))) {
 319                 int i;
 320                 unsigned int tiles = req->dst_rect.h / 16;
 321                 unsigned int remainder = req->dst_rect.h % 16;
 322                 req->src_rect.w = 16*req->src_rect.w / req->dst_rect.h;
 323                 req->dst_rect.h = 16;
 324                 for (i = 0; i < tiles; i++) {
 325                         enable_mdp_irq(mdp, DL0_ROI_DONE);
 326                         ret = mdp_ppp_blit(mdp, req, src_file, src_start,
 327                                            src_len, dst_file, dst_start,
 328                                            dst_len);
 329                         if (ret)
 330                                 goto err_bad_blit;
 331                         ret = mdp_ppp_wait(mdp);
 332                         if (ret)
 333                                 goto err_wait_failed;
 334                         req->dst_rect.y += 16;
 335                         req->src_rect.x += req->src_rect.w;
 336                 }
 337                 if (!remainder)
 338                         goto end;
 339                 req->src_rect.w = remainder*req->src_rect.w / req->dst_rect.h;
 340                 req->dst_rect.h = remainder;
 341         }
 342         enable_mdp_irq(mdp, DL0_ROI_DONE);
 343         ret = mdp_ppp_blit(mdp, req, src_file, src_start, src_len, dst_file,
 344                            dst_start,
 345                            dst_len);
 346         if (ret)
 347                 goto err_bad_blit;
 348         ret = mdp_ppp_wait(mdp);
 349         if (ret)
 350                 goto err_wait_failed;
 351 end:
 352         put_img(src_file, dst_file);
 353         mutex_unlock(&mdp_mutex);
 354         return 0;
 355 err_bad_blit:
 356         disable_mdp_irq(mdp, DL0_ROI_DONE);
 357 err_wait_failed:
 358         put_img(src_file, dst_file);
 359         mutex_unlock(&mdp_mutex);
 360         return ret;
 361 }
 362
 363 void mdp_set_grp_disp(struct mdp_device *mdp_dev, unsigned disp_id)
 364 {
 365         struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
 366
 367         disp_id &= 0xf;
 368         mdp_writel(mdp, disp_id, MDP_FULL_BYPASS_WORD43);
 369 }
 370
 371 int register_mdp_client(struct class_interface *cint)
 372 {
 373         if (!mdp_class) {
 374                 pr_err("mdp: no mdp_class when registering mdp client\n");
 375                 return -ENODEV;
 376         }
 377         cint->class = mdp_class;
 378         return class_interface_register(cint);
 379 }
 380
 381 #include "mdp_csc_table.h"
 382 #include "mdp_scale_tables.h"
 383
 384 int mdp_probe(struct platform_device *pdev)
 385 {
 386         struct resource *resource;
 387         int ret;
 388         int n;
 389         struct mdp_info *mdp;
 390
 391         resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 392         if (!resource) {
 393                 pr_err("mdp: can not get mdp mem resource!\n");
 394                 return -ENOMEM;
 395         }
 396
 397         mdp = kzalloc(sizeof(struct mdp_info), GFP_KERNEL);
 398         if (!mdp)
 399                 return -ENOMEM;
 400
 401         mdp->irq = platform_get_irq(pdev, 0);
 402         if (mdp->irq < 0) {
 403                 pr_err("mdp: can not get mdp irq\n");
 404                 ret = mdp->irq;
 405                 goto error_get_irq;
 406         }
 407
 408         mdp->base = ioremap(resource->start, resource_size(resource));
 409         if (mdp->base == 0) {
 410                 printk(KERN_ERR "msmfb: cannot allocate mdp regs!\n");
 411                 ret = -ENOMEM;
 412                 goto error_ioremap;
 413         }
 414
 415         mdp->mdp_dev.dma = mdp_dma;
 416         mdp->mdp_dev.dma_wait = mdp_dma_wait;
 417         mdp->mdp_dev.blit = mdp_blit;
 418         mdp->mdp_dev.set_grp_disp = mdp_set_grp_disp;
 419
 420         clk = clk_get(&pdev->dev, "mdp_clk");
 421         if (IS_ERR(clk)) {
 422                 printk(KERN_INFO "mdp: failed to get mdp clk");
 423                 ret = PTR_ERR(clk);
 424                 goto error_get_clk;
 425         }
 426
 427         ret = request_irq(mdp->irq, mdp_isr, 0, "msm_mdp", mdp);
 428         if (ret)
 429                 goto error_request_irq;
 430         disable_irq(mdp->irq);
 431         mdp_irq_mask = 0;
 432
 433         /* debug interface write access */
 434         mdp_writel(mdp, 1, 0x60);
 435
 436         mdp_writel(mdp, MDP_ANY_INTR_MASK, MDP_INTR_ENABLE);
 437         mdp_writel(mdp, 1, MDP_EBI2_PORTMAP_MODE);
 438
 439         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01f8);
 440         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01fc);
 441
 442         for (n = 0; n < ARRAY_SIZE(csc_table); n++)
 443                 mdp_writel(mdp, csc_table[n].val, csc_table[n].reg);
 444
 445         /* clear up unused fg/main registers */
 446         /* comp.plane 2&3 ystride */
 447         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0120);
 448
 449         /* unpacked pattern */
 450         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x012c);
 451         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0130);
 452         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0134);
 453         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0158);
 454         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x015c);
 455         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0160);
 456         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0170);
 457         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0174);
 458         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x017c);
 459
 460         /* comp.plane 2 & 3 */
 461         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0114);
 462         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0118);
 463
 464         /* clear unused bg registers */
 465         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01c8);
 466         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01d0);
 467         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01dc);
 468         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e0);
 469         mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e4);
 470
 471         for (n = 0; n < ARRAY_SIZE(mdp_upscale_table); n++)
 472                 mdp_writel(mdp, mdp_upscale_table[n].val,
 473                        mdp_upscale_table[n].reg);
 474
 475         for (n = 0; n < 9; n++)
 476                 mdp_writel(mdp, mdp_default_ccs[n], 0x40440 + 4 * n);
 477         mdp_writel(mdp, mdp_default_ccs[9], 0x40500 + 4 * 0);
 478         mdp_writel(mdp, mdp_default_ccs[10], 0x40500 + 4 * 0);
 479         mdp_writel(mdp, mdp_default_ccs[11], 0x40500 + 4 * 0);
 480
 481         /* register mdp device */
 482         mdp->mdp_dev.dev.parent = &pdev->dev;
 483         mdp->mdp_dev.dev.class = mdp_class;
 484         dev_set_name(&mdp->mdp_dev.dev, "mdp%d", pdev->id);
 485
 486         /* if you can remove the platform device you'd have to implement
 487          * this:
 488         mdp_dev.release = mdp_class; */
 489
 490         ret = device_register(&mdp->mdp_dev.dev);
 491         if (ret)
 492                 goto error_device_register;
 493         return 0;
 494
 495 error_device_register:
 496         free_irq(mdp->irq, mdp);
 497 error_request_irq:
 498 error_get_clk:
 499         iounmap(mdp->base);
 500 error_get_irq:
 501 error_ioremap:
 502         kfree(mdp);
 503         return ret;
 504 }
 505
 506 static struct platform_driver msm_mdp_driver = {
 507         .probe = mdp_probe,
 508         .driver = {.name = "msm_mdp"},
 509 };
 510
 511 static int __init mdp_init(void)
 512 {
 513         mdp_class = class_create(THIS_MODULE, "msm_mdp");
 514         if (IS_ERR(mdp_class)) {
 515                 printk(KERN_ERR "Error creating mdp class\n");
 516                 return PTR_ERR(mdp_class);
 517         }
 518         return platform_driver_register(&msm_mdp_driver);
 519 }
 520
 521 subsys_initcall(mdp_init);