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