drivers/video/ipu_common.c

   1 /*
   2  * Porting to u-boot:
   3  *
   4  * (C) Copyright 2010
   5  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   6  *
   7  * Linux IPU driver for MX51:
   8  *
   9  * (C) Copyright 2005-2010 Freescale Semiconductor, Inc.
  10  *
  11  * See file CREDITS for list of people who contributed to this
  12  * project.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License as
  16  * published by the Free Software Foundation; either version 2 of
  17  * the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  * MA 02111-1307 USA
  28  */
  29
  30 /* #define DEBUG */
  31 #include <common.h>
  32 #include <linux/types.h>
  33 #include <linux/err.h>
  34 #include <asm/io.h>
  35 #include <asm/errno.h>
  36 #include <asm/arch/imx-regs.h>
  37 #include <asm/arch/crm_regs.h>
  38 #include "ipu.h"
  39 #include "ipu_regs.h"
  40
  41 extern struct mxc_ccm_reg *mxc_ccm;
  42 extern u32 *ipu_cpmem_base;
  43
  44 struct ipu_ch_param_word {
  45         uint32_t data[5];
  46         uint32_t res[3];
  47 };
  48
  49 struct ipu_ch_param {
  50         struct ipu_ch_param_word word[2];
  51 };
  52
  53 #define ipu_ch_param_addr(ch) (((struct ipu_ch_param *)ipu_cpmem_base) + (ch))
  54
  55 #define _param_word(base, w) \
  56         (((struct ipu_ch_param *)(base))->word[(w)].data)
  57
  58 #define ipu_ch_param_set_field(base, w, bit, size, v) { \
  59         int i = (bit) / 32; \
  60         int off = (bit) % 32; \
  61         _param_word(base, w)[i] |= (v) << off; \
  62         if (((bit) + (size) - 1) / 32 > i) { \
  63                 _param_word(base, w)[i + 1] |= (v) >> (off ? (32 - off) : 0); \
  64         } \
  65 }
  66
  67 #define ipu_ch_param_mod_field(base, w, bit, size, v) { \
  68         int i = (bit) / 32; \
  69         int off = (bit) % 32; \
  70         u32 mask = (1UL << size) - 1; \
  71         u32 temp = _param_word(base, w)[i]; \
  72         temp &= ~(mask << off); \
  73         _param_word(base, w)[i] = temp | (v) << off; \
  74         if (((bit) + (size) - 1) / 32 > i) { \
  75                 temp = _param_word(base, w)[i + 1]; \
  76                 temp &= ~(mask >> (32 - off)); \
  77                 _param_word(base, w)[i + 1] = \
  78                         temp | ((v) >> (off ? (32 - off) : 0)); \
  79         } \
  80 }
  81
  82 #define ipu_ch_param_read_field(base, w, bit, size) ({ \
  83         u32 temp2; \
  84         int i = (bit) / 32; \
  85         int off = (bit) % 32; \
  86         u32 mask = (1UL << size) - 1; \
  87         u32 temp1 = _param_word(base, w)[i]; \
  88         temp1 = mask & (temp1 >> off); \
  89         if (((bit)+(size) - 1) / 32 > i) { \
  90                 temp2 = _param_word(base, w)[i + 1]; \
  91                 temp2 &= mask >> (off ? (32 - off) : 0); \
  92                 temp1 |= temp2 << (off ? (32 - off) : 0); \
  93         } \
  94         temp1; \
  95 })
  96
  97
  98 void clk_enable(struct clk *clk)
  99 {
 100         if (clk) {
 101                 if (clk->usecount++ == 0) {
 102                         clk->enable(clk);
 103                 }
 104         }
 105 }
 106
 107 void clk_disable(struct clk *clk)
 108 {
 109         if (clk) {
 110                 if (!(--clk->usecount)) {
 111                         if (clk->disable)
 112                                 clk->disable(clk);
 113                 }
 114         }
 115 }
 116
 117 int clk_get_usecount(struct clk *clk)
 118 {
 119         if (clk == NULL)
 120                 return 0;
 121
 122         return clk->usecount;
 123 }
 124
 125 u32 clk_get_rate(struct clk *clk)
 126 {
 127         if (!clk)
 128                 return 0;
 129
 130         return clk->rate;
 131 }
 132
 133 struct clk *clk_get_parent(struct clk *clk)
 134 {
 135         if (!clk)
 136                 return 0;
 137
 138         return clk->parent;
 139 }
 140
 141 int clk_set_rate(struct clk *clk, unsigned long rate)
 142 {
 143         if (clk && clk->set_rate)
 144                 clk->set_rate(clk, rate);
 145         return clk->rate;
 146 }
 147
 148 long clk_round_rate(struct clk *clk, unsigned long rate)
 149 {
 150         if (clk == NULL || !clk->round_rate)
 151                 return 0;
 152
 153         return clk->round_rate(clk, rate);
 154 }
 155
 156 int clk_set_parent(struct clk *clk, struct clk *parent)
 157 {
 158         clk->parent = parent;
 159         if (clk->set_parent)
 160                 return clk->set_parent(clk, parent);
 161         return 0;
 162 }
 163
 164 static int clk_ipu_enable(struct clk *clk)
 165 {
 166         u32 reg;
 167
 168         reg = __raw_readl(clk->enable_reg);
 169         reg |= MXC_CCM_CCGR_CG_MASK << clk->enable_shift;
 170         __raw_writel(reg, clk->enable_reg);
 171
 172         /* Handshake with IPU when certain clock rates are changed. */
 173         reg = __raw_readl(&mxc_ccm->ccdr);
 174         reg &= ~MXC_CCM_CCDR_IPU_HS_MASK;
 175         __raw_writel(reg, &mxc_ccm->ccdr);
 176
 177         /* Handshake with IPU when LPM is entered as its enabled. */
 178         reg = __raw_readl(&mxc_ccm->clpcr);
 179         reg &= ~MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
 180         __raw_writel(reg, &mxc_ccm->clpcr);
 181
 182         return 0;
 183 }
 184
 185 static void clk_ipu_disable(struct clk *clk)
 186 {
 187         u32 reg;
 188
 189         reg = __raw_readl(clk->enable_reg);
 190         reg &= ~(MXC_CCM_CCGR_CG_MASK << clk->enable_shift);
 191         __raw_writel(reg, clk->enable_reg);
 192
 193         /*
 194          * No handshake with IPU whe dividers are changed
 195          * as its not enabled.
 196          */
 197         reg = __raw_readl(&mxc_ccm->ccdr);
 198         reg |= MXC_CCM_CCDR_IPU_HS_MASK;
 199         __raw_writel(reg, &mxc_ccm->ccdr);
 200
 201         /* No handshake with IPU when LPM is entered as its not enabled. */
 202         reg = __raw_readl(&mxc_ccm->clpcr);
 203         reg |= MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
 204         __raw_writel(reg, &mxc_ccm->clpcr);
 205 }
 206
 207
 208 static struct clk ipu_clk = {
 209         .name = "ipu_clk",
 210         .rate = 133000000,
 211         .enable_reg = (u32 *)(MXC_CCM_BASE +
 212                 offsetof(struct mxc_ccm_reg, CCGR5)),
 213         .enable_shift = MXC_CCM_CCGR5_CG5_OFFSET,
 214         .enable = clk_ipu_enable,
 215         .disable = clk_ipu_disable,
 216         .usecount = 0,
 217 };
 218
 219 /* Globals */
 220 struct clk *g_ipu_clk;
 221 unsigned char g_ipu_clk_enabled;
 222 struct clk *g_di_clk[2];
 223 struct clk *g_pixel_clk[2];
 224 unsigned char g_dc_di_assignment[10];
 225 uint32_t g_channel_init_mask;
 226 uint32_t g_channel_enable_mask;
 227
 228 static int ipu_dc_use_count;
 229 static int ipu_dp_use_count;
 230 static int ipu_dmfc_use_count;
 231 static int ipu_di_use_count[2];
 232
 233 u32 *ipu_cpmem_base;
 234 u32 *ipu_dc_tmpl_reg;
 235
 236 /* Static functions */
 237
 238 static inline void ipu_ch_param_set_high_priority(uint32_t ch)
 239 {
 240         ipu_ch_param_mod_field(ipu_ch_param_addr(ch), 1, 93, 2, 1);
 241 };
 242
 243 static inline uint32_t channel_2_dma(ipu_channel_t ch, ipu_buffer_t type)
 244 {
 245         return ((uint32_t) ch >> (6 * type)) & 0x3F;
 246 };
 247
 248 /* Either DP BG or DP FG can be graphic window */
 249 static inline int ipu_is_dp_graphic_chan(uint32_t dma_chan)
 250 {
 251         return (dma_chan == 23 || dma_chan == 27);
 252 }
 253
 254 static inline int ipu_is_dmfc_chan(uint32_t dma_chan)
 255 {
 256         return ((dma_chan >= 23) && (dma_chan <= 29));
 257 }
 258
 259
 260 static inline void ipu_ch_param_set_buffer(uint32_t ch, int bufNum,
 261                                             dma_addr_t phyaddr)
 262 {
 263         ipu_ch_param_mod_field(ipu_ch_param_addr(ch), 1, 29 * bufNum, 29,
 264                                phyaddr / 8);
 265 };
 266
 267 #define idma_is_valid(ch)       (ch != NO_DMA)
 268 #define idma_mask(ch)           (idma_is_valid(ch) ? (1UL << (ch & 0x1F)) : 0)
 269 #define idma_is_set(reg, dma)   (__raw_readl(reg(dma)) & idma_mask(dma))
 270
 271 static void ipu_pixel_clk_recalc(struct clk *clk)
 272 {
 273         u32 div = __raw_readl(DI_BS_CLKGEN0(clk->id));
 274         if (div == 0)
 275                 clk->rate = 0;
 276         else
 277                 clk->rate = (clk->parent->rate * 16) / div;
 278 }
 279
 280 static unsigned long ipu_pixel_clk_round_rate(struct clk *clk,
 281         unsigned long rate)
 282 {
 283         u32 div, div1;
 284         u32 tmp;
 285         /*
 286          * Calculate divider
 287          * Fractional part is 4 bits,
 288          * so simply multiply by 2^4 to get fractional part.
 289          */
 290         tmp = (clk->parent->rate * 16);
 291         div = tmp / rate;
 292
 293         if (div < 0x10)            /* Min DI disp clock divider is 1 */
 294                 div = 0x10;
 295         if (div & ~0xFEF)
 296                 div &= 0xFF8;
 297         else {
 298                 div1 = div & 0xFE0;
 299                 if ((tmp/div1 - tmp/div) < rate / 4)
 300                         div = div1;
 301                 else
 302                         div &= 0xFF8;
 303         }
 304         return (clk->parent->rate * 16) / div;
 305 }
 306
 307 static int ipu_pixel_clk_set_rate(struct clk *clk, unsigned long rate)
 308 {
 309         u32 div = (clk->parent->rate * 16) / rate;
 310
 311         __raw_writel(div, DI_BS_CLKGEN0(clk->id));
 312
 313         /* Setup pixel clock timing */
 314         __raw_writel((div / 16) << 16, DI_BS_CLKGEN1(clk->id));
 315
 316         clk->rate = (clk->parent->rate * 16) / div;
 317         return 0;
 318 }
 319
 320 static int ipu_pixel_clk_enable(struct clk *clk)
 321 {
 322         u32 disp_gen = __raw_readl(IPU_DISP_GEN);
 323         disp_gen |= clk->id ? DI1_COUNTER_RELEASE : DI0_COUNTER_RELEASE;
 324         __raw_writel(disp_gen, IPU_DISP_GEN);
 325
 326         return 0;
 327 }
 328
 329 static void ipu_pixel_clk_disable(struct clk *clk)
 330 {
 331         u32 disp_gen = __raw_readl(IPU_DISP_GEN);
 332         disp_gen &= clk->id ? ~DI1_COUNTER_RELEASE : ~DI0_COUNTER_RELEASE;
 333         __raw_writel(disp_gen, IPU_DISP_GEN);
 334
 335 }
 336
 337 static int ipu_pixel_clk_set_parent(struct clk *clk, struct clk *parent)
 338 {
 339         u32 di_gen = __raw_readl(DI_GENERAL(clk->id));
 340
 341         if (parent == g_ipu_clk)
 342                 di_gen &= ~DI_GEN_DI_CLK_EXT;
 343         else if (!IS_ERR(g_di_clk[clk->id]) && parent == g_di_clk[clk->id])
 344                 di_gen |= DI_GEN_DI_CLK_EXT;
 345         else
 346                 return -EINVAL;
 347
 348         __raw_writel(di_gen, DI_GENERAL(clk->id));
 349         ipu_pixel_clk_recalc(clk);
 350         return 0;
 351 }
 352
 353 static struct clk pixel_clk[] = {
 354         {
 355         .name = "pixel_clk",
 356         .id = 0,
 357         .recalc = ipu_pixel_clk_recalc,
 358         .set_rate = ipu_pixel_clk_set_rate,
 359         .round_rate = ipu_pixel_clk_round_rate,
 360         .set_parent = ipu_pixel_clk_set_parent,
 361         .enable = ipu_pixel_clk_enable,
 362         .disable = ipu_pixel_clk_disable,
 363         .usecount = 0,
 364         },
 365         {
 366         .name = "pixel_clk",
 367         .id = 1,
 368         .recalc = ipu_pixel_clk_recalc,
 369         .set_rate = ipu_pixel_clk_set_rate,
 370         .round_rate = ipu_pixel_clk_round_rate,
 371         .set_parent = ipu_pixel_clk_set_parent,
 372         .enable = ipu_pixel_clk_enable,
 373         .disable = ipu_pixel_clk_disable,
 374         .usecount = 0,
 375         },
 376 };
 377
 378 /*
 379  * This function resets IPU
 380  */
 381 void ipu_reset(void)
 382 {
 383         u32 *reg;
 384         u32 value;
 385
 386         reg = (u32 *)SRC_BASE_ADDR;
 387         value = __raw_readl(reg);
 388         value = value | SW_IPU_RST;
 389         __raw_writel(value, reg);
 390 }
 391
 392 /*
 393  * This function is called by the driver framework to initialize the IPU
 394  * hardware.
 395  *
 396  * @param       dev     The device structure for the IPU passed in by the
 397  *                      driver framework.
 398  *
 399  * @return      Returns 0 on success or negative error code on error
 400  */
 401 int ipu_probe(void)
 402 {
 403         unsigned long ipu_base;
 404 #if defined CONFIG_MX51
 405         u32 temp;
 406
 407         u32 *reg_hsc_mcd = (u32 *)MIPI_HSC_BASE_ADDR;
 408         u32 *reg_hsc_mxt_conf = (u32 *)(MIPI_HSC_BASE_ADDR + 0x800);
 409
 410          __raw_writel(0xF00, reg_hsc_mcd);
 411
 412         /* CSI mode reserved*/
 413         temp = __raw_readl(reg_hsc_mxt_conf);
 414          __raw_writel(temp | 0x0FF, reg_hsc_mxt_conf);
 415
 416         temp = __raw_readl(reg_hsc_mxt_conf);
 417         __raw_writel(temp | 0x10000, reg_hsc_mxt_conf);
 418 #endif
 419
 420         ipu_base = IPU_CTRL_BASE_ADDR;
 421         ipu_cpmem_base = (u32 *)(ipu_base + IPU_CPMEM_REG_BASE);
 422         ipu_dc_tmpl_reg = (u32 *)(ipu_base + IPU_DC_TMPL_REG_BASE);
 423
 424         g_pixel_clk[0] = &pixel_clk[0];
 425         g_pixel_clk[1] = &pixel_clk[1];
 426
 427         g_ipu_clk = &ipu_clk;
 428         debug("ipu_clk = %u\n", clk_get_rate(g_ipu_clk));
 429
 430         ipu_reset();
 431
 432         clk_set_parent(g_pixel_clk[0], g_ipu_clk);
 433         clk_set_parent(g_pixel_clk[1], g_ipu_clk);
 434         clk_enable(g_ipu_clk);
 435
 436         g_di_clk[0] = NULL;
 437         g_di_clk[1] = NULL;
 438
 439         __raw_writel(0x807FFFFF, IPU_MEM_RST);
 440         while (__raw_readl(IPU_MEM_RST) & 0x80000000)
 441                 ;
 442
 443         ipu_init_dc_mappings();
 444
 445         __raw_writel(0, IPU_INT_CTRL(5));
 446         __raw_writel(0, IPU_INT_CTRL(6));
 447         __raw_writel(0, IPU_INT_CTRL(9));
 448         __raw_writel(0, IPU_INT_CTRL(10));
 449
 450         /* DMFC Init */
 451         ipu_dmfc_init(DMFC_NORMAL, 1);
 452
 453         /* Set sync refresh channels as high priority */
 454         __raw_writel(0x18800000L, IDMAC_CHA_PRI(0));
 455
 456         /* Set MCU_T to divide MCU access window into 2 */
 457         __raw_writel(0x00400000L | (IPU_MCU_T_DEFAULT << 18), IPU_DISP_GEN);
 458
 459         clk_disable(g_ipu_clk);
 460
 461         return 0;
 462 }
 463
 464 void ipu_dump_registers(void)
 465 {
 466         debug("IPU_CONF = \t0x%08X\n", __raw_readl(IPU_CONF));
 467         debug("IDMAC_CONF = \t0x%08X\n", __raw_readl(IDMAC_CONF));
 468         debug("IDMAC_CHA_EN1 = \t0x%08X\n",
 469                __raw_readl(IDMAC_CHA_EN(0)));
 470         debug("IDMAC_CHA_EN2 = \t0x%08X\n",
 471                __raw_readl(IDMAC_CHA_EN(32)));
 472         debug("IDMAC_CHA_PRI1 = \t0x%08X\n",
 473                __raw_readl(IDMAC_CHA_PRI(0)));
 474         debug("IDMAC_CHA_PRI2 = \t0x%08X\n",
 475                __raw_readl(IDMAC_CHA_PRI(32)));
 476         debug("IPU_CHA_DB_MODE_SEL0 = \t0x%08X\n",
 477                __raw_readl(IPU_CHA_DB_MODE_SEL(0)));
 478         debug("IPU_CHA_DB_MODE_SEL1 = \t0x%08X\n",
 479                __raw_readl(IPU_CHA_DB_MODE_SEL(32)));
 480         debug("DMFC_WR_CHAN = \t0x%08X\n",
 481                __raw_readl(DMFC_WR_CHAN));
 482         debug("DMFC_WR_CHAN_DEF = \t0x%08X\n",
 483                __raw_readl(DMFC_WR_CHAN_DEF));
 484         debug("DMFC_DP_CHAN = \t0x%08X\n",
 485                __raw_readl(DMFC_DP_CHAN));
 486         debug("DMFC_DP_CHAN_DEF = \t0x%08X\n",
 487                __raw_readl(DMFC_DP_CHAN_DEF));
 488         debug("DMFC_IC_CTRL = \t0x%08X\n",
 489                __raw_readl(DMFC_IC_CTRL));
 490         debug("IPU_FS_PROC_FLOW1 = \t0x%08X\n",
 491                __raw_readl(IPU_FS_PROC_FLOW1));
 492         debug("IPU_FS_PROC_FLOW2 = \t0x%08X\n",
 493                __raw_readl(IPU_FS_PROC_FLOW2));
 494         debug("IPU_FS_PROC_FLOW3 = \t0x%08X\n",
 495                __raw_readl(IPU_FS_PROC_FLOW3));
 496         debug("IPU_FS_DISP_FLOW1 = \t0x%08X\n",
 497                __raw_readl(IPU_FS_DISP_FLOW1));
 498 }
 499
 500 /*
 501  * This function is called to initialize a logical IPU channel.
 502  *
 503  * @param       channel Input parameter for the logical channel ID to init.
 504  *
 505  * @param       params  Input parameter containing union of channel
 506  *                      initialization parameters.
 507  *
 508  * @return      Returns 0 on success or negative error code on fail
 509  */
 510 int32_t ipu_init_channel(ipu_channel_t channel, ipu_channel_params_t *params)
 511 {
 512         int ret = 0;
 513         uint32_t ipu_conf;
 514
 515         debug("init channel = %d\n", IPU_CHAN_ID(channel));
 516
 517         if (g_ipu_clk_enabled == 0) {
 518                 g_ipu_clk_enabled = 1;
 519                 clk_enable(g_ipu_clk);
 520         }
 521
 522
 523         if (g_channel_init_mask & (1L << IPU_CHAN_ID(channel))) {
 524                 printf("Warning: channel already initialized %d\n",
 525                         IPU_CHAN_ID(channel));
 526         }
 527
 528         ipu_conf = __raw_readl(IPU_CONF);
 529
 530         switch (channel) {
 531         case MEM_DC_SYNC:
 532                 if (params->mem_dc_sync.di > 1) {
 533                         ret = -EINVAL;
 534                         goto err;
 535                 }
 536
 537                 g_dc_di_assignment[1] = params->mem_dc_sync.di;
 538                 ipu_dc_init(1, params->mem_dc_sync.di,
 539                              params->mem_dc_sync.interlaced);
 540                 ipu_di_use_count[params->mem_dc_sync.di]++;
 541                 ipu_dc_use_count++;
 542                 ipu_dmfc_use_count++;
 543                 break;
 544         case MEM_BG_SYNC:
 545                 if (params->mem_dp_bg_sync.di > 1) {
 546                         ret = -EINVAL;
 547                         goto err;
 548                 }
 549
 550                 g_dc_di_assignment[5] = params->mem_dp_bg_sync.di;
 551                 ipu_dp_init(channel, params->mem_dp_bg_sync.in_pixel_fmt,
 552                              params->mem_dp_bg_sync.out_pixel_fmt);
 553                 ipu_dc_init(5, params->mem_dp_bg_sync.di,
 554                              params->mem_dp_bg_sync.interlaced);
 555                 ipu_di_use_count[params->mem_dp_bg_sync.di]++;
 556                 ipu_dc_use_count++;
 557                 ipu_dp_use_count++;
 558                 ipu_dmfc_use_count++;
 559                 break;
 560         case MEM_FG_SYNC:
 561                 ipu_dp_init(channel, params->mem_dp_fg_sync.in_pixel_fmt,
 562                              params->mem_dp_fg_sync.out_pixel_fmt);
 563
 564                 ipu_dc_use_count++;
 565                 ipu_dp_use_count++;
 566                 ipu_dmfc_use_count++;
 567                 break;
 568         default:
 569                 printf("Missing channel initialization\n");
 570                 break;
 571         }
 572
 573         /* Enable IPU sub module */
 574         g_channel_init_mask |= 1L << IPU_CHAN_ID(channel);
 575         if (ipu_dc_use_count == 1)
 576                 ipu_conf |= IPU_CONF_DC_EN;
 577         if (ipu_dp_use_count == 1)
 578                 ipu_conf |= IPU_CONF_DP_EN;
 579         if (ipu_dmfc_use_count == 1)
 580                 ipu_conf |= IPU_CONF_DMFC_EN;
 581         if (ipu_di_use_count[0] == 1) {
 582                 ipu_conf |= IPU_CONF_DI0_EN;
 583         }
 584         if (ipu_di_use_count[1] == 1) {
 585                 ipu_conf |= IPU_CONF_DI1_EN;
 586         }
 587
 588         __raw_writel(ipu_conf, IPU_CONF);
 589
 590 err:
 591         return ret;
 592 }
 593
 594 /*
 595  * This function is called to uninitialize a logical IPU channel.
 596  *
 597  * @param       channel Input parameter for the logical channel ID to uninit.
 598  */
 599 void ipu_uninit_channel(ipu_channel_t channel)
 600 {
 601         uint32_t reg;
 602         uint32_t in_dma, out_dma = 0;
 603         uint32_t ipu_conf;
 604
 605         if ((g_channel_init_mask & (1L << IPU_CHAN_ID(channel))) == 0) {
 606                 debug("Channel already uninitialized %d\n",
 607                         IPU_CHAN_ID(channel));
 608                 return;
 609         }
 610
 611         /*
 612          * Make sure channel is disabled
 613          * Get input and output dma channels
 614          */
 615         in_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
 616         out_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
 617
 618         if (idma_is_set(IDMAC_CHA_EN, in_dma) ||
 619             idma_is_set(IDMAC_CHA_EN, out_dma)) {
 620                 printf(
 621                         "Channel %d is not disabled, disable first\n",
 622                         IPU_CHAN_ID(channel));
 623                 return;
 624         }
 625
 626         ipu_conf = __raw_readl(IPU_CONF);
 627
 628         /* Reset the double buffer */
 629         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(in_dma));
 630         __raw_writel(reg & ~idma_mask(in_dma), IPU_CHA_DB_MODE_SEL(in_dma));
 631         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(out_dma));
 632         __raw_writel(reg & ~idma_mask(out_dma), IPU_CHA_DB_MODE_SEL(out_dma));
 633
 634         switch (channel) {
 635         case MEM_DC_SYNC:
 636                 ipu_dc_uninit(1);
 637                 ipu_di_use_count[g_dc_di_assignment[1]]--;
 638                 ipu_dc_use_count--;
 639                 ipu_dmfc_use_count--;
 640                 break;
 641         case MEM_BG_SYNC:
 642                 ipu_dp_uninit(channel);
 643                 ipu_dc_uninit(5);
 644                 ipu_di_use_count[g_dc_di_assignment[5]]--;
 645                 ipu_dc_use_count--;
 646                 ipu_dp_use_count--;
 647                 ipu_dmfc_use_count--;
 648                 break;
 649         case MEM_FG_SYNC:
 650                 ipu_dp_uninit(channel);
 651                 ipu_dc_use_count--;
 652                 ipu_dp_use_count--;
 653                 ipu_dmfc_use_count--;
 654                 break;
 655         default:
 656                 break;
 657         }
 658
 659         g_channel_init_mask &= ~(1L << IPU_CHAN_ID(channel));
 660
 661         if (ipu_dc_use_count == 0)
 662                 ipu_conf &= ~IPU_CONF_DC_EN;
 663         if (ipu_dp_use_count == 0)
 664                 ipu_conf &= ~IPU_CONF_DP_EN;
 665         if (ipu_dmfc_use_count == 0)
 666                 ipu_conf &= ~IPU_CONF_DMFC_EN;
 667         if (ipu_di_use_count[0] == 0) {
 668                 ipu_conf &= ~IPU_CONF_DI0_EN;
 669         }
 670         if (ipu_di_use_count[1] == 0) {
 671                 ipu_conf &= ~IPU_CONF_DI1_EN;
 672         }
 673
 674         __raw_writel(ipu_conf, IPU_CONF);
 675
 676         if (ipu_conf == 0) {
 677                 clk_disable(g_ipu_clk);
 678                 g_ipu_clk_enabled = 0;
 679         }
 680
 681 }
 682
 683 static inline void ipu_ch_param_dump(int ch)
 684 {
 685 #ifdef DEBUG
 686         struct ipu_ch_param *p = ipu_ch_param_addr(ch);
 687         debug("ch %d word 0 - %08X %08X %08X %08X %08X\n", ch,
 688                  p->word[0].data[0], p->word[0].data[1], p->word[0].data[2],
 689                  p->word[0].data[3], p->word[0].data[4]);
 690         debug("ch %d word 1 - %08X %08X %08X %08X %08X\n", ch,
 691                  p->word[1].data[0], p->word[1].data[1], p->word[1].data[2],
 692                  p->word[1].data[3], p->word[1].data[4]);
 693         debug("PFS 0x%x, ",
 694                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 85, 4));
 695         debug("BPP 0x%x, ",
 696                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 107, 3));
 697         debug("NPB 0x%x\n",
 698                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 78, 7));
 699
 700         debug("FW %d, ",
 701                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 125, 13));
 702         debug("FH %d, ",
 703                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 138, 12));
 704         debug("Stride %d\n",
 705                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 102, 14));
 706
 707         debug("Width0 %d+1, ",
 708                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 116, 3));
 709         debug("Width1 %d+1, ",
 710                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 119, 3));
 711         debug("Width2 %d+1, ",
 712                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 122, 3));
 713         debug("Width3 %d+1, ",
 714                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 125, 3));
 715         debug("Offset0 %d, ",
 716                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 128, 5));
 717         debug("Offset1 %d, ",
 718                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 133, 5));
 719         debug("Offset2 %d, ",
 720                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 138, 5));
 721         debug("Offset3 %d\n",
 722                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 143, 5));
 723 #endif
 724 }
 725
 726 static inline void ipu_ch_params_set_packing(struct ipu_ch_param *p,
 727                                               int red_width, int red_offset,
 728                                               int green_width, int green_offset,
 729                                               int blue_width, int blue_offset,
 730                                               int alpha_width, int alpha_offset)
 731 {
 732         /* Setup red width and offset */
 733         ipu_ch_param_set_field(p, 1, 116, 3, red_width - 1);
 734         ipu_ch_param_set_field(p, 1, 128, 5, red_offset);
 735         /* Setup green width and offset */
 736         ipu_ch_param_set_field(p, 1, 119, 3, green_width - 1);
 737         ipu_ch_param_set_field(p, 1, 133, 5, green_offset);
 738         /* Setup blue width and offset */
 739         ipu_ch_param_set_field(p, 1, 122, 3, blue_width - 1);
 740         ipu_ch_param_set_field(p, 1, 138, 5, blue_offset);
 741         /* Setup alpha width and offset */
 742         ipu_ch_param_set_field(p, 1, 125, 3, alpha_width - 1);
 743         ipu_ch_param_set_field(p, 1, 143, 5, alpha_offset);
 744 }
 745
 746 static void ipu_ch_param_init(int ch,
 747                               uint32_t pixel_fmt, uint32_t width,
 748                               uint32_t height, uint32_t stride,
 749                               uint32_t u, uint32_t v,
 750                               uint32_t uv_stride, dma_addr_t addr0,
 751                               dma_addr_t addr1)
 752 {
 753         uint32_t u_offset = 0;
 754         uint32_t v_offset = 0;
 755         struct ipu_ch_param params;
 756
 757         memset(&params, 0, sizeof(params));
 758
 759         ipu_ch_param_set_field(&params, 0, 125, 13, width - 1);
 760
 761         if ((ch == 8) || (ch == 9) || (ch == 10)) {
 762                 ipu_ch_param_set_field(&params, 0, 138, 12, (height / 2) - 1);
 763                 ipu_ch_param_set_field(&params, 1, 102, 14, (stride * 2) - 1);
 764         } else {
 765                 ipu_ch_param_set_field(&params, 0, 138, 12, height - 1);
 766                 ipu_ch_param_set_field(&params, 1, 102, 14, stride - 1);
 767         }
 768
 769         ipu_ch_param_set_field(&params, 1, 0, 29, addr0 >> 3);
 770         ipu_ch_param_set_field(&params, 1, 29, 29, addr1 >> 3);
 771
 772         switch (pixel_fmt) {
 773         case IPU_PIX_FMT_GENERIC:
 774                 /*Represents 8-bit Generic data */
 775                 ipu_ch_param_set_field(&params, 0, 107, 3, 5);  /* bits/pixel */
 776                 ipu_ch_param_set_field(&params, 1, 85, 4, 6);   /* pix format */
 777                 ipu_ch_param_set_field(&params, 1, 78, 7, 63);  /* burst size */
 778
 779                 break;
 780         case IPU_PIX_FMT_GENERIC_32:
 781                 /*Represents 32-bit Generic data */
 782                 break;
 783         case IPU_PIX_FMT_RGB565:
 784                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 785                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 786                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 787
 788                 ipu_ch_params_set_packing(&params, 5, 0, 6, 5, 5, 11, 8, 16);
 789                 break;
 790         case IPU_PIX_FMT_BGR24:
 791                 ipu_ch_param_set_field(&params, 0, 107, 3, 1);  /* bits/pixel */
 792                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 793                 ipu_ch_param_set_field(&params, 1, 78, 7, 19);  /* burst size */
 794
 795                 ipu_ch_params_set_packing(&params, 8, 0, 8, 8, 8, 16, 8, 24);
 796                 break;
 797         case IPU_PIX_FMT_RGB24:
 798         case IPU_PIX_FMT_YUV444:
 799                 ipu_ch_param_set_field(&params, 0, 107, 3, 1);  /* bits/pixel */
 800                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 801                 ipu_ch_param_set_field(&params, 1, 78, 7, 19);  /* burst size */
 802
 803                 ipu_ch_params_set_packing(&params, 8, 16, 8, 8, 8, 0, 8, 24);
 804                 break;
 805         case IPU_PIX_FMT_BGRA32:
 806         case IPU_PIX_FMT_BGR32:
 807                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 808                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 809                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 810
 811                 ipu_ch_params_set_packing(&params, 8, 8, 8, 16, 8, 24, 8, 0);
 812                 break;
 813         case IPU_PIX_FMT_RGBA32:
 814         case IPU_PIX_FMT_RGB32:
 815                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 816                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 817                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 818
 819                 ipu_ch_params_set_packing(&params, 8, 24, 8, 16, 8, 8, 8, 0);
 820                 break;
 821         case IPU_PIX_FMT_ABGR32:
 822                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 823                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 824
 825                 ipu_ch_params_set_packing(&params, 8, 0, 8, 8, 8, 16, 8, 24);
 826                 break;
 827         case IPU_PIX_FMT_UYVY:
 828                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 829                 ipu_ch_param_set_field(&params, 1, 85, 4, 0xA); /* pix format */
 830                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 831                 break;
 832         case IPU_PIX_FMT_YUYV:
 833                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 834                 ipu_ch_param_set_field(&params, 1, 85, 4, 0x8); /* pix format */
 835                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 836                 break;
 837         case IPU_PIX_FMT_YUV420P2:
 838         case IPU_PIX_FMT_YUV420P:
 839                 ipu_ch_param_set_field(&params, 1, 85, 4, 2);   /* pix format */
 840
 841                 if (uv_stride < stride / 2)
 842                         uv_stride = stride / 2;
 843
 844                 u_offset = stride * height;
 845                 v_offset = u_offset + (uv_stride * height / 2);
 846                 /* burst size */
 847                 if ((ch == 8) || (ch == 9) || (ch == 10)) {
 848                         ipu_ch_param_set_field(&params, 1, 78, 7, 15);
 849                         uv_stride = uv_stride*2;
 850                 } else {
 851                         ipu_ch_param_set_field(&params, 1, 78, 7, 31);
 852                 }
 853                 break;
 854         case IPU_PIX_FMT_YVU422P:
 855                 /* BPP & pixel format */
 856                 ipu_ch_param_set_field(&params, 1, 85, 4, 1);   /* pix format */
 857                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 858
 859                 if (uv_stride < stride / 2)
 860                         uv_stride = stride / 2;
 861
 862                 v_offset = (v == 0) ? stride * height : v;
 863                 u_offset = (u == 0) ? v_offset + v_offset / 2 : u;
 864                 break;
 865         case IPU_PIX_FMT_YUV422P:
 866                 /* BPP & pixel format */
 867                 ipu_ch_param_set_field(&params, 1, 85, 4, 1);   /* pix format */
 868                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 869
 870                 if (uv_stride < stride / 2)
 871                         uv_stride = stride / 2;
 872
 873                 u_offset = (u == 0) ? stride * height : u;
 874                 v_offset = (v == 0) ? u_offset + u_offset / 2 : v;
 875                 break;
 876         case IPU_PIX_FMT_NV12:
 877                 /* BPP & pixel format */
 878                 ipu_ch_param_set_field(&params, 1, 85, 4, 4);   /* pix format */
 879                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 880                 uv_stride = stride;
 881                 u_offset = (u == 0) ? stride * height : u;
 882                 break;
 883         default:
 884                 puts("mxc ipu: unimplemented pixel format\n");
 885                 break;
 886         }
 887
 888
 889         if (uv_stride)
 890                 ipu_ch_param_set_field(&params, 1, 128, 14, uv_stride - 1);
 891
 892         /* Get the uv offset from user when need cropping */
 893         if (u || v) {
 894                 u_offset = u;
 895                 v_offset = v;
 896         }
 897
 898         /* UBO and VBO are 22-bit */
 899         if (u_offset/8 > 0x3fffff)
 900                 puts("The value of U offset exceeds IPU limitation\n");
 901         if (v_offset/8 > 0x3fffff)
 902                 puts("The value of V offset exceeds IPU limitation\n");
 903
 904         ipu_ch_param_set_field(&params, 0, 46, 22, u_offset / 8);
 905         ipu_ch_param_set_field(&params, 0, 68, 22, v_offset / 8);
 906
 907         debug("initializing idma ch %d @ %p\n", ch, ipu_ch_param_addr(ch));
 908         memcpy(ipu_ch_param_addr(ch), &params, sizeof(params));
 909 };
 910
 911 /*
 912  * This function is called to initialize a buffer for logical IPU channel.
 913  *
 914  * @param       channel         Input parameter for the logical channel ID.
 915  *
 916  * @param       type            Input parameter which buffer to initialize.
 917  *
 918  * @param       pixel_fmt       Input parameter for pixel format of buffer.
 919  *                              Pixel format is a FOURCC ASCII code.
 920  *
 921  * @param       width           Input parameter for width of buffer in pixels.
 922  *
 923  * @param       height          Input parameter for height of buffer in pixels.
 924  *
 925  * @param       stride          Input parameter for stride length of buffer
 926  *                              in pixels.
 927  *
 928  * @param       phyaddr_0       Input parameter buffer 0 physical address.
 929  *
 930  * @param       phyaddr_1       Input parameter buffer 1 physical address.
 931  *                              Setting this to a value other than NULL enables
 932  *                              double buffering mode.
 933  *
 934  * @param       u               private u offset for additional cropping,
 935  *                              zero if not used.
 936  *
 937  * @param       v               private v offset for additional cropping,
 938  *                              zero if not used.
 939  *
 940  * @return      Returns 0 on success or negative error code on fail
 941  */
 942 int32_t ipu_init_channel_buffer(ipu_channel_t channel, ipu_buffer_t type,
 943                                 uint32_t pixel_fmt,
 944                                 uint16_t width, uint16_t height,
 945                                 uint32_t stride,
 946                                 dma_addr_t phyaddr_0, dma_addr_t phyaddr_1,
 947                                 uint32_t u, uint32_t v)
 948 {
 949         uint32_t reg;
 950         uint32_t dma_chan;
 951
 952         dma_chan = channel_2_dma(channel, type);
 953         if (!idma_is_valid(dma_chan))
 954                 return -EINVAL;
 955
 956         if (stride < width * bytes_per_pixel(pixel_fmt))
 957                 stride = width * bytes_per_pixel(pixel_fmt);
 958
 959         if (stride % 4) {
 960                 printf(
 961                         "Stride not 32-bit aligned, stride = %d\n", stride);
 962                 return -EINVAL;
 963         }
 964         /* Build parameter memory data for DMA channel */
 965         ipu_ch_param_init(dma_chan, pixel_fmt, width, height, stride, u, v, 0,
 966                            phyaddr_0, phyaddr_1);
 967
 968         if (ipu_is_dmfc_chan(dma_chan)) {
 969                 ipu_dmfc_set_wait4eot(dma_chan, width);
 970         }
 971
 972         if (idma_is_set(IDMAC_CHA_PRI, dma_chan))
 973                 ipu_ch_param_set_high_priority(dma_chan);
 974
 975         ipu_ch_param_dump(dma_chan);
 976
 977         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(dma_chan));
 978         if (phyaddr_1)
 979                 reg |= idma_mask(dma_chan);
 980         else
 981                 reg &= ~idma_mask(dma_chan);
 982         __raw_writel(reg, IPU_CHA_DB_MODE_SEL(dma_chan));
 983
 984         /* Reset to buffer 0 */
 985         __raw_writel(idma_mask(dma_chan), IPU_CHA_CUR_BUF(dma_chan));
 986
 987         return 0;
 988 }
 989
 990 /*
 991  * This function enables a logical channel.
 992  *
 993  * @param       channel         Input parameter for the logical channel ID.
 994  *
 995  * @return      This function returns 0 on success or negative error code on
 996  *              fail.
 997  */
 998 int32_t ipu_enable_channel(ipu_channel_t channel)
 999 {
1000         uint32_t reg;
1001         uint32_t in_dma;
1002         uint32_t out_dma;
1003
1004         if (g_channel_enable_mask & (1L << IPU_CHAN_ID(channel))) {
1005                 printf("Warning: channel already enabled %d\n",
1006                         IPU_CHAN_ID(channel));
1007         }
1008
1009         /* Get input and output dma channels */
1010         out_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
1011         in_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
1012
1013         if (idma_is_valid(in_dma)) {
1014                 reg = __raw_readl(IDMAC_CHA_EN(in_dma));
1015                 __raw_writel(reg | idma_mask(in_dma), IDMAC_CHA_EN(in_dma));
1016         }
1017         if (idma_is_valid(out_dma)) {
1018                 reg = __raw_readl(IDMAC_CHA_EN(out_dma));
1019                 __raw_writel(reg | idma_mask(out_dma), IDMAC_CHA_EN(out_dma));
1020         }
1021
1022         if ((channel == MEM_DC_SYNC) || (channel == MEM_BG_SYNC) ||
1023             (channel == MEM_FG_SYNC))
1024                 ipu_dp_dc_enable(channel);
1025
1026         g_channel_enable_mask |= 1L << IPU_CHAN_ID(channel);
1027
1028         return 0;
1029 }
1030
1031 /*
1032  * This function clear buffer ready for a logical channel.
1033  *
1034  * @param       channel         Input parameter for the logical channel ID.
1035  *
1036  * @param       type            Input parameter which buffer to clear.
1037  *
1038  * @param       bufNum          Input parameter for which buffer number clear
1039  *                              ready state.
1040  *
1041  */
1042 void ipu_clear_buffer_ready(ipu_channel_t channel, ipu_buffer_t type,
1043                 uint32_t bufNum)
1044 {
1045         uint32_t dma_ch = channel_2_dma(channel, type);
1046
1047         if (!idma_is_valid(dma_ch))
1048                 return;
1049
1050         __raw_writel(0xF0000000, IPU_GPR); /* write one to clear */
1051         if (bufNum == 0) {
1052                 if (idma_is_set(IPU_CHA_BUF0_RDY, dma_ch)) {
1053                         __raw_writel(idma_mask(dma_ch),
1054                                         IPU_CHA_BUF0_RDY(dma_ch));
1055                 }
1056         } else {
1057                 if (idma_is_set(IPU_CHA_BUF1_RDY, dma_ch)) {
1058                         __raw_writel(idma_mask(dma_ch),
1059                                         IPU_CHA_BUF1_RDY(dma_ch));
1060                 }
1061         }
1062         __raw_writel(0x0, IPU_GPR); /* write one to set */
1063 }
1064
1065 /*
1066  * This function disables a logical channel.
1067  *
1068  * @param       channel         Input parameter for the logical channel ID.
1069  *
1070  * @param       wait_for_stop   Flag to set whether to wait for channel end
1071  *                              of frame or return immediately.
1072  *
1073  * @return      This function returns 0 on success or negative error code on
1074  *              fail.
1075  */
1076 int32_t ipu_disable_channel(ipu_channel_t channel)
1077 {
1078         uint32_t reg;
1079         uint32_t in_dma;
1080         uint32_t out_dma;
1081
1082         if ((g_channel_enable_mask & (1L << IPU_CHAN_ID(channel))) == 0) {
1083                 debug("Channel already disabled %d\n",
1084                         IPU_CHAN_ID(channel));
1085                 return 0;
1086         }
1087
1088         /* Get input and output dma channels */
1089         out_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
1090         in_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
1091
1092         if ((idma_is_valid(in_dma) &&
1093                 !idma_is_set(IDMAC_CHA_EN, in_dma))
1094                 && (idma_is_valid(out_dma) &&
1095                 !idma_is_set(IDMAC_CHA_EN, out_dma)))
1096                 return -EINVAL;
1097
1098         if ((channel == MEM_BG_SYNC) || (channel == MEM_FG_SYNC) ||
1099             (channel == MEM_DC_SYNC)) {
1100                 ipu_dp_dc_disable(channel, 0);
1101         }
1102
1103         /* Disable DMA channel(s) */
1104         if (idma_is_valid(in_dma)) {
1105                 reg = __raw_readl(IDMAC_CHA_EN(in_dma));
1106                 __raw_writel(reg & ~idma_mask(in_dma), IDMAC_CHA_EN(in_dma));
1107                 __raw_writel(idma_mask(in_dma), IPU_CHA_CUR_BUF(in_dma));
1108         }
1109         if (idma_is_valid(out_dma)) {
1110                 reg = __raw_readl(IDMAC_CHA_EN(out_dma));
1111                 __raw_writel(reg & ~idma_mask(out_dma), IDMAC_CHA_EN(out_dma));
1112                 __raw_writel(idma_mask(out_dma), IPU_CHA_CUR_BUF(out_dma));
1113         }
1114
1115         g_channel_enable_mask &= ~(1L << IPU_CHAN_ID(channel));
1116
1117         /* Set channel buffers NOT to be ready */
1118         if (idma_is_valid(in_dma)) {
1119                 ipu_clear_buffer_ready(channel, IPU_VIDEO_IN_BUFFER, 0);
1120                 ipu_clear_buffer_ready(channel, IPU_VIDEO_IN_BUFFER, 1);
1121         }
1122         if (idma_is_valid(out_dma)) {
1123                 ipu_clear_buffer_ready(channel, IPU_OUTPUT_BUFFER, 0);
1124                 ipu_clear_buffer_ready(channel, IPU_OUTPUT_BUFFER, 1);
1125         }
1126
1127         return 0;
1128 }
1129
1130 uint32_t bytes_per_pixel(uint32_t fmt)
1131 {
1132         switch (fmt) {
1133         case IPU_PIX_FMT_GENERIC:       /*generic data */
1134         case IPU_PIX_FMT_RGB332:
1135         case IPU_PIX_FMT_YUV420P:
1136         case IPU_PIX_FMT_YUV422P:
1137                 return 1;
1138                 break;
1139         case IPU_PIX_FMT_RGB565:
1140         case IPU_PIX_FMT_YUYV:
1141         case IPU_PIX_FMT_UYVY:
1142                 return 2;
1143                 break;
1144         case IPU_PIX_FMT_BGR24:
1145         case IPU_PIX_FMT_RGB24:
1146                 return 3;
1147                 break;
1148         case IPU_PIX_FMT_GENERIC_32:    /*generic data */
1149         case IPU_PIX_FMT_BGR32:
1150         case IPU_PIX_FMT_BGRA32:
1151         case IPU_PIX_FMT_RGB32:
1152         case IPU_PIX_FMT_RGBA32:
1153         case IPU_PIX_FMT_ABGR32:
1154                 return 4;
1155                 break;
1156         default:
1157                 return 1;
1158                 break;
1159         }
1160         return 0;
1161 }
1162
1163 ipu_color_space_t format_to_colorspace(uint32_t fmt)
1164 {
1165         switch (fmt) {
1166         case IPU_PIX_FMT_RGB666:
1167         case IPU_PIX_FMT_RGB565:
1168         case IPU_PIX_FMT_BGR24:
1169         case IPU_PIX_FMT_RGB24:
1170         case IPU_PIX_FMT_BGR32:
1171         case IPU_PIX_FMT_BGRA32:
1172         case IPU_PIX_FMT_RGB32:
1173         case IPU_PIX_FMT_RGBA32:
1174         case IPU_PIX_FMT_ABGR32:
1175         case IPU_PIX_FMT_LVDS666:
1176         case IPU_PIX_FMT_LVDS888:
1177                 return RGB;
1178                 break;
1179
1180         default:
1181                 return YCbCr;
1182                 break;
1183         }
1184         return RGB;
1185 }