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 #if defined(CONFIG_MX51)
 211         .rate = 133000000,
 212 #elif defined(CONFIG_MX53)
 213         .rate = 216000000,
 214 #endif
 215         .enable_reg = (u32 *)(MXC_CCM_BASE +
 216                 offsetof(struct mxc_ccm_reg, CCGR5)),
 217         .enable_shift = MXC_CCM_CCGR5_CG5_OFFSET,
 218         .enable = clk_ipu_enable,
 219         .disable = clk_ipu_disable,
 220 };
 221
 222 /* Globals */
 223 struct clk *g_ipu_clk;
 224 unsigned char g_ipu_clk_enabled;
 225 struct clk *g_di_clk[2];
 226 struct clk *g_pixel_clk[2];
 227 unsigned char g_dc_di_assignment[10];
 228 uint32_t g_channel_init_mask;
 229 uint32_t g_channel_enable_mask;
 230
 231 static int ipu_dc_use_count;
 232 static int ipu_dp_use_count;
 233 static int ipu_dmfc_use_count;
 234 static int ipu_di_use_count[2];
 235
 236 u32 *ipu_cpmem_base;
 237 u32 *ipu_dc_tmpl_reg;
 238
 239 /* Static functions */
 240
 241 static inline void ipu_ch_param_set_high_priority(uint32_t ch)
 242 {
 243         ipu_ch_param_mod_field(ipu_ch_param_addr(ch), 1, 93, 2, 1);
 244 };
 245
 246 static inline uint32_t channel_2_dma(ipu_channel_t ch, ipu_buffer_t type)
 247 {
 248         return ((uint32_t) ch >> (6 * type)) & 0x3F;
 249 };
 250
 251 /* Either DP BG or DP FG can be graphic window */
 252 static inline int ipu_is_dp_graphic_chan(uint32_t dma_chan)
 253 {
 254         return (dma_chan == 23 || dma_chan == 27);
 255 }
 256
 257 static inline int ipu_is_dmfc_chan(uint32_t dma_chan)
 258 {
 259         return ((dma_chan >= 23) && (dma_chan <= 29));
 260 }
 261
 262
 263 static inline void ipu_ch_param_set_buffer(uint32_t ch, int bufNum,
 264                                             dma_addr_t phyaddr)
 265 {
 266         ipu_ch_param_mod_field(ipu_ch_param_addr(ch), 1, 29 * bufNum, 29,
 267                                phyaddr / 8);
 268 };
 269
 270 #define idma_is_valid(ch)       (ch != NO_DMA)
 271 #define idma_mask(ch)           (idma_is_valid(ch) ? (1UL << (ch & 0x1F)) : 0)
 272 #define idma_is_set(reg, dma)   (__raw_readl(reg(dma)) & idma_mask(dma))
 273
 274 static void ipu_pixel_clk_recalc(struct clk *clk)
 275 {
 276         u32 div = __raw_readl(DI_BS_CLKGEN0(clk->id));
 277         if (div == 0)
 278                 clk->rate = 0;
 279         else
 280                 clk->rate = (clk->parent->rate * 16) / div;
 281 }
 282
 283 static unsigned long ipu_pixel_clk_round_rate(struct clk *clk,
 284         unsigned long rate)
 285 {
 286         u32 div, div1;
 287         u32 tmp;
 288         /*
 289          * Calculate divider
 290          * Fractional part is 4 bits,
 291          * so simply multiply by 2^4 to get fractional part.
 292          */
 293         tmp = clk->parent->rate * 16;
 294         div = tmp / rate;
 295
 296         if (div < 0x10)            /* Min DI disp clock divider is 1 */
 297                 div = 0x10;
 298         if (div & ~0xFEF)
 299                 div &= 0xFF8;
 300         else {
 301                 div1 = div & 0xFE0;
 302                 if ((tmp/div1 - tmp/div) < rate / 4)
 303                         div = div1;
 304                 else
 305                         div &= 0xFF8;
 306         }
 307         return (clk->parent->rate * 16) / div;
 308 }
 309
 310 static int ipu_pixel_clk_set_rate(struct clk *clk, unsigned long rate)
 311 {
 312         u32 div = (clk->parent->rate * 16) / rate;
 313
 314         __raw_writel(div, DI_BS_CLKGEN0(clk->id));
 315
 316         /* Setup pixel clock timing */
 317         __raw_writel((div / 16) << 16, DI_BS_CLKGEN1(clk->id));
 318
 319         clk->rate = (clk->parent->rate * 16) / div;
 320         return 0;
 321 }
 322
 323 static int ipu_pixel_clk_enable(struct clk *clk)
 324 {
 325         u32 disp_gen = __raw_readl(IPU_DISP_GEN);
 326         disp_gen |= clk->id ? DI1_COUNTER_RELEASE : DI0_COUNTER_RELEASE;
 327         __raw_writel(disp_gen, IPU_DISP_GEN);
 328
 329         return 0;
 330 }
 331
 332 static void ipu_pixel_clk_disable(struct clk *clk)
 333 {
 334         u32 disp_gen = __raw_readl(IPU_DISP_GEN);
 335         disp_gen &= clk->id ? ~DI1_COUNTER_RELEASE : ~DI0_COUNTER_RELEASE;
 336         __raw_writel(disp_gen, IPU_DISP_GEN);
 337 }
 338
 339 static int ipu_pixel_clk_set_parent(struct clk *clk, struct clk *parent)
 340 {
 341         u32 di_gen = __raw_readl(DI_GENERAL(clk->id));
 342
 343         if (parent == g_ipu_clk)
 344                 di_gen &= ~DI_GEN_DI_CLK_EXT;
 345         else if (!IS_ERR(g_di_clk[clk->id]) && parent == g_di_clk[clk->id])
 346                 di_gen |= DI_GEN_DI_CLK_EXT;
 347         else
 348                 return -EINVAL;
 349
 350         __raw_writel(di_gen, DI_GENERAL(clk->id));
 351         ipu_pixel_clk_recalc(clk);
 352         return 0;
 353 }
 354
 355 static struct clk pixel_clk[] = {
 356         {
 357                 .name = "pixel_clk",
 358                 .id = 0,
 359                 .recalc = ipu_pixel_clk_recalc,
 360                 .set_rate = ipu_pixel_clk_set_rate,
 361                 .round_rate = ipu_pixel_clk_round_rate,
 362                 .set_parent = ipu_pixel_clk_set_parent,
 363                 .enable = ipu_pixel_clk_enable,
 364                 .disable = ipu_pixel_clk_disable,
 365         },
 366         {
 367                 .name = "pixel_clk",
 368                 .id = 1,
 369                 .recalc = ipu_pixel_clk_recalc,
 370                 .set_rate = ipu_pixel_clk_set_rate,
 371                 .round_rate = ipu_pixel_clk_round_rate,
 372                 .set_parent = ipu_pixel_clk_set_parent,
 373                 .enable = ipu_pixel_clk_enable,
 374                 .disable = ipu_pixel_clk_disable,
 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 #ifdef CONFIG_MX51
 405         u32 temp;
 406         u32 *reg_hsc_mcd = (u32 *)MIPI_HSC_BASE_ADDR;
 407         u32 *reg_hsc_mxt_conf = (u32 *)(MIPI_HSC_BASE_ADDR + 0x800);
 408
 409          __raw_writel(0xF00, reg_hsc_mcd);
 410
 411         /* CSI mode reserved*/
 412         temp = __raw_readl(reg_hsc_mxt_conf);
 413          __raw_writel(temp | 0x0FF, reg_hsc_mxt_conf);
 414
 415         temp = __raw_readl(reg_hsc_mxt_conf);
 416         __raw_writel(temp | 0x10000, reg_hsc_mxt_conf);
 417 #endif
 418         ipu_base = IPU_CTRL_BASE_ADDR;
 419         ipu_cpmem_base = (u32 *)(ipu_base + IPU_CPMEM_REG_BASE);
 420         ipu_dc_tmpl_reg = (u32 *)(ipu_base + IPU_DC_TMPL_REG_BASE);
 421
 422         g_pixel_clk[0] = &pixel_clk[0];
 423         g_pixel_clk[1] = &pixel_clk[1];
 424
 425         g_ipu_clk = &ipu_clk;
 426         debug("ipu_clk = %u\n", clk_get_rate(g_ipu_clk));
 427
 428         ipu_reset();
 429
 430         clk_set_parent(g_pixel_clk[0], g_ipu_clk);
 431         clk_set_parent(g_pixel_clk[1], g_ipu_clk);
 432         clk_enable(g_ipu_clk);
 433
 434         g_di_clk[0] = NULL;
 435         g_di_clk[1] = NULL;
 436
 437         __raw_writel(0x807FFFFF, IPU_MEM_RST);
 438         while (__raw_readl(IPU_MEM_RST) & 0x80000000)
 439                 ;
 440
 441         ipu_init_dc_mappings();
 442
 443         __raw_writel(0, IPU_INT_CTRL(5));
 444         __raw_writel(0, IPU_INT_CTRL(6));
 445         __raw_writel(0, IPU_INT_CTRL(9));
 446         __raw_writel(0, IPU_INT_CTRL(10));
 447
 448         /* DMFC Init */
 449         ipu_dmfc_init(DMFC_NORMAL, 1);
 450
 451         /* Set sync refresh channels as high priority */
 452         __raw_writel(0x18800000L, IDMAC_CHA_PRI(0));
 453
 454         /* Set MCU_T to divide MCU access window into 2 */
 455         __raw_writel(0x00400000L | (IPU_MCU_T_DEFAULT << 18), IPU_DISP_GEN);
 456
 457         clk_disable(g_ipu_clk);
 458
 459         return 0;
 460 }
 461
 462 void ipu_dump_registers(void)
 463 {
 464         debug("IPU_CONF             0x%08X\n", __raw_readl(IPU_CONF));
 465         debug("IDMAC_CONF           0x%08X\n", __raw_readl(IDMAC_CONF));
 466         debug("IDMAC_CHA_EN1        0x%08X\n",
 467                __raw_readl(IDMAC_CHA_EN(0)));
 468         debug("IDMAC_CHA_EN2        0x%08X\n",
 469                __raw_readl(IDMAC_CHA_EN(32)));
 470         debug("IDMAC_CHA_PRI1       0x%08X\n",
 471                __raw_readl(IDMAC_CHA_PRI(0)));
 472         debug("IDMAC_CHA_PRI2       0x%08X\n",
 473                __raw_readl(IDMAC_CHA_PRI(32)));
 474         debug("IPU_CHA_DB_MODE_SEL0 0x%08X\n",
 475                __raw_readl(IPU_CHA_DB_MODE_SEL(0)));
 476         debug("IPU_CHA_DB_MODE_SEL1 0x%08X\n",
 477                __raw_readl(IPU_CHA_DB_MODE_SEL(32)));
 478         debug("DMFC_WR_CHAN         0x%08X\n",
 479                __raw_readl(DMFC_WR_CHAN));
 480         debug("DMFC_WR_CHAN_DEF     0x%08X\n",
 481                __raw_readl(DMFC_WR_CHAN_DEF));
 482         debug("DMFC_DP_CHAN         0x%08X\n",
 483                __raw_readl(DMFC_DP_CHAN));
 484         debug("DMFC_DP_CHAN_DEF     0x%08X\n",
 485                __raw_readl(DMFC_DP_CHAN_DEF));
 486         debug("DMFC_IC_CTRL         0x%08X\n",
 487                __raw_readl(DMFC_IC_CTRL));
 488         debug("IPU_FS_PROC_FLOW1    0x%08X\n",
 489                __raw_readl(IPU_FS_PROC_FLOW1));
 490         debug("IPU_FS_PROC_FLOW2    0x%08X\n",
 491                __raw_readl(IPU_FS_PROC_FLOW2));
 492         debug("IPU_FS_PROC_FLOW3    0x%08X\n",
 493                __raw_readl(IPU_FS_PROC_FLOW3));
 494         debug("IPU_FS_DISP_FLOW1    0x%08X\n",
 495                __raw_readl(IPU_FS_DISP_FLOW1));
 496 }
 497
 498 /*
 499  * This function is called to initialize a logical IPU channel.
 500  *
 501  * @param       channel Input parameter for the logical channel ID to init.
 502  *
 503  * @param       params  Input parameter containing union of channel
 504  *                      initialization parameters.
 505  *
 506  * @return      Returns 0 on success or negative error code on fail
 507  */
 508 int32_t ipu_init_channel(ipu_channel_t channel, ipu_channel_params_t *params)
 509 {
 510         int ret = 0;
 511         uint32_t ipu_conf;
 512
 513         debug("init channel = %d\n", IPU_CHAN_ID(channel));
 514
 515         if (g_ipu_clk_enabled == 0) {
 516                 g_ipu_clk_enabled = 1;
 517                 clk_enable(g_ipu_clk);
 518         }
 519
 520
 521         if (g_channel_init_mask & (1L << IPU_CHAN_ID(channel))) {
 522                 printf("Warning: channel already initialized %d\n",
 523                         IPU_CHAN_ID(channel));
 524         }
 525
 526         ipu_conf = __raw_readl(IPU_CONF);
 527
 528         switch (channel) {
 529         case MEM_DC_SYNC:
 530                 if (params->mem_dc_sync.di > 1) {
 531                         ret = -EINVAL;
 532                         goto err;
 533                 }
 534
 535                 g_dc_di_assignment[1] = params->mem_dc_sync.di;
 536                 ipu_dc_init(1, params->mem_dc_sync.di,
 537                              params->mem_dc_sync.interlaced);
 538                 ipu_di_use_count[params->mem_dc_sync.di]++;
 539                 ipu_dc_use_count++;
 540                 ipu_dmfc_use_count++;
 541                 break;
 542         case MEM_BG_SYNC:
 543                 if (params->mem_dp_bg_sync.di > 1) {
 544                         ret = -EINVAL;
 545                         goto err;
 546                 }
 547
 548                 g_dc_di_assignment[5] = params->mem_dp_bg_sync.di;
 549                 ipu_dp_init(channel, params->mem_dp_bg_sync.in_pixel_fmt,
 550                              params->mem_dp_bg_sync.out_pixel_fmt);
 551                 ipu_dc_init(5, params->mem_dp_bg_sync.di,
 552                              params->mem_dp_bg_sync.interlaced);
 553                 ipu_di_use_count[params->mem_dp_bg_sync.di]++;
 554                 ipu_dc_use_count++;
 555                 ipu_dp_use_count++;
 556                 ipu_dmfc_use_count++;
 557                 break;
 558         case MEM_FG_SYNC:
 559                 ipu_dp_init(channel, params->mem_dp_fg_sync.in_pixel_fmt,
 560                              params->mem_dp_fg_sync.out_pixel_fmt);
 561
 562                 ipu_dc_use_count++;
 563                 ipu_dp_use_count++;
 564                 ipu_dmfc_use_count++;
 565                 break;
 566         default:
 567                 printf("Missing channel initialization\n");
 568                 break;
 569         }
 570
 571         /* Enable IPU sub module */
 572         g_channel_init_mask |= 1L << IPU_CHAN_ID(channel);
 573         if (ipu_dc_use_count == 1)
 574                 ipu_conf |= IPU_CONF_DC_EN;
 575         if (ipu_dp_use_count == 1)
 576                 ipu_conf |= IPU_CONF_DP_EN;
 577         if (ipu_dmfc_use_count == 1)
 578                 ipu_conf |= IPU_CONF_DMFC_EN;
 579         if (ipu_di_use_count[0] == 1) {
 580                 ipu_conf |= IPU_CONF_DI0_EN;
 581         }
 582         if (ipu_di_use_count[1] == 1) {
 583                 ipu_conf |= IPU_CONF_DI1_EN;
 584         }
 585
 586         __raw_writel(ipu_conf, IPU_CONF);
 587
 588 err:
 589         return ret;
 590 }
 591
 592 /*
 593  * This function is called to uninitialize a logical IPU channel.
 594  *
 595  * @param       channel Input parameter for the logical channel ID to uninit.
 596  */
 597 void ipu_uninit_channel(ipu_channel_t channel)
 598 {
 599         uint32_t reg;
 600         uint32_t in_dma, out_dma = 0;
 601         uint32_t ipu_conf;
 602
 603         if ((g_channel_init_mask & (1L << IPU_CHAN_ID(channel))) == 0) {
 604                 debug("Channel already uninitialized %d\n",
 605                         IPU_CHAN_ID(channel));
 606                 return;
 607         }
 608
 609         /*
 610          * Make sure channel is disabled
 611          * Get input and output dma channels
 612          */
 613         in_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
 614         out_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
 615
 616         if (idma_is_set(IDMAC_CHA_EN, in_dma) ||
 617             idma_is_set(IDMAC_CHA_EN, out_dma)) {
 618                 printf("Channel %d is not disabled, disable first\n",
 619                         IPU_CHAN_ID(channel));
 620                 return;
 621         }
 622
 623         ipu_conf = __raw_readl(IPU_CONF);
 624
 625         /* Reset the double buffer */
 626         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(in_dma));
 627         __raw_writel(reg & ~idma_mask(in_dma), IPU_CHA_DB_MODE_SEL(in_dma));
 628         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(out_dma));
 629         __raw_writel(reg & ~idma_mask(out_dma), IPU_CHA_DB_MODE_SEL(out_dma));
 630
 631         switch (channel) {
 632         case MEM_DC_SYNC:
 633                 ipu_dc_uninit(1);
 634                 ipu_di_use_count[g_dc_di_assignment[1]]--;
 635                 ipu_dc_use_count--;
 636                 ipu_dmfc_use_count--;
 637                 break;
 638         case MEM_BG_SYNC:
 639                 ipu_dp_uninit(channel);
 640                 ipu_dc_uninit(5);
 641                 ipu_di_use_count[g_dc_di_assignment[5]]--;
 642                 ipu_dc_use_count--;
 643                 ipu_dp_use_count--;
 644                 ipu_dmfc_use_count--;
 645                 break;
 646         case MEM_FG_SYNC:
 647                 ipu_dp_uninit(channel);
 648                 ipu_dc_use_count--;
 649                 ipu_dp_use_count--;
 650                 ipu_dmfc_use_count--;
 651                 break;
 652         default:
 653                 break;
 654         }
 655
 656         g_channel_init_mask &= ~(1L << IPU_CHAN_ID(channel));
 657
 658         if (ipu_dc_use_count == 0)
 659                 ipu_conf &= ~IPU_CONF_DC_EN;
 660         if (ipu_dp_use_count == 0)
 661                 ipu_conf &= ~IPU_CONF_DP_EN;
 662         if (ipu_dmfc_use_count == 0)
 663                 ipu_conf &= ~IPU_CONF_DMFC_EN;
 664         if (ipu_di_use_count[0] == 0) {
 665                 ipu_conf &= ~IPU_CONF_DI0_EN;
 666         }
 667         if (ipu_di_use_count[1] == 0) {
 668                 ipu_conf &= ~IPU_CONF_DI1_EN;
 669         }
 670
 671         __raw_writel(ipu_conf, IPU_CONF);
 672
 673         /* clear interrupt status */
 674         __raw_writel(__raw_readl(IPU_STAT), IPU_STAT);
 675
 676         if (ipu_conf == 0) {
 677                 clk_disable(g_ipu_clk);
 678                 g_ipu_clk_enabled = 0;
 679         }
 680 }
 681
 682 static inline void ipu_ch_param_dump(int ch)
 683 {
 684 #ifdef DEBUG
 685         struct ipu_ch_param *p = ipu_ch_param_addr(ch);
 686         debug("ch %d word 0 - %08X %08X %08X %08X %08X\n", ch,
 687                  p->word[0].data[0], p->word[0].data[1], p->word[0].data[2],
 688                  p->word[0].data[3], p->word[0].data[4]);
 689         debug("ch %d word 1 - %08X %08X %08X %08X %08X\n", ch,
 690                  p->word[1].data[0], p->word[1].data[1], p->word[1].data[2],
 691                  p->word[1].data[3], p->word[1].data[4]);
 692         debug("PFS 0x%x, ",
 693                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 85, 4));
 694         debug("BPP 0x%x, ",
 695                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 107, 3));
 696         debug("NPB 0x%x\n",
 697                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 78, 7));
 698
 699         debug("FW %d, ",
 700                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 125, 13));
 701         debug("FH %d, ",
 702                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 138, 12));
 703         debug("Stride %d\n",
 704                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 102, 14));
 705
 706         debug("Width0 %d+1, ",
 707                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 116, 3));
 708         debug("Width1 %d+1, ",
 709                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 119, 3));
 710         debug("Width2 %d+1, ",
 711                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 122, 3));
 712         debug("Width3 %d+1, ",
 713                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 125, 3));
 714         debug("Offset0 %d, ",
 715                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 128, 5));
 716         debug("Offset1 %d, ",
 717                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 133, 5));
 718         debug("Offset2 %d, ",
 719                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 138, 5));
 720         debug("Offset3 %d\n",
 721                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 143, 5));
 722 #endif
 723 }
 724
 725 static inline void ipu_ch_params_set_packing(struct ipu_ch_param *p,
 726                                               int red_width, int red_offset,
 727                                               int green_width, int green_offset,
 728                                               int blue_width, int blue_offset,
 729                                               int alpha_width, int alpha_offset)
 730 {
 731         /* Setup red width and offset */
 732         ipu_ch_param_set_field(p, 1, 116, 3, red_width - 1);
 733         ipu_ch_param_set_field(p, 1, 128, 5, red_offset);
 734         /* Setup green width and offset */
 735         ipu_ch_param_set_field(p, 1, 119, 3, green_width - 1);
 736         ipu_ch_param_set_field(p, 1, 133, 5, green_offset);
 737         /* Setup blue width and offset */
 738         ipu_ch_param_set_field(p, 1, 122, 3, blue_width - 1);
 739         ipu_ch_param_set_field(p, 1, 138, 5, blue_offset);
 740         /* Setup alpha width and offset */
 741         ipu_ch_param_set_field(p, 1, 125, 3, alpha_width - 1);
 742         ipu_ch_param_set_field(p, 1, 143, 5, alpha_offset);
 743 }
 744
 745 static void ipu_ch_param_init(int ch,
 746                               uint32_t pixel_fmt, uint32_t width,
 747                               uint32_t height, uint32_t stride,
 748                               uint32_t u, uint32_t v,
 749                               uint32_t uv_stride, dma_addr_t addr0,
 750                               dma_addr_t addr1)
 751 {
 752         uint32_t u_offset = 0;
 753         uint32_t v_offset = 0;
 754         struct ipu_ch_param params;
 755
 756         memset(&params, 0, sizeof(params));
 757
 758         ipu_ch_param_set_field(&params, 0, 125, 13, width - 1);
 759
 760         if ((ch == 8) || (ch == 9) || (ch == 10)) {
 761                 ipu_ch_param_set_field(&params, 0, 138, 12, (height / 2) - 1);
 762                 ipu_ch_param_set_field(&params, 1, 102, 14, (stride * 2) - 1);
 763         } else {
 764                 ipu_ch_param_set_field(&params, 0, 138, 12, height - 1);
 765                 ipu_ch_param_set_field(&params, 1, 102, 14, stride - 1);
 766         }
 767
 768         ipu_ch_param_set_field(&params, 1, 0, 29, addr0 >> 3);
 769         ipu_ch_param_set_field(&params, 1, 29, 29, addr1 >> 3);
 770
 771         switch (pixel_fmt) {
 772         case IPU_PIX_FMT_GENERIC:
 773                 /*Represents 8-bit Generic data */
 774                 ipu_ch_param_set_field(&params, 0, 107, 3, 5);  /* bits/pixel */
 775                 ipu_ch_param_set_field(&params, 1, 85, 4, 6);   /* pix format */
 776                 ipu_ch_param_set_field(&params, 1, 78, 7, 63);  /* burst size */
 777
 778                 break;
 779         case IPU_PIX_FMT_GENERIC_32:
 780                 /*Represents 32-bit Generic data */
 781                 break;
 782         case IPU_PIX_FMT_RGB565:
 783                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 784                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 785                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 786
 787                 ipu_ch_params_set_packing(&params, 5, 0, 6, 5, 5, 11, 8, 16);
 788                 break;
 789         case IPU_PIX_FMT_BGR24:
 790                 ipu_ch_param_set_field(&params, 0, 107, 3, 1);  /* bits/pixel */
 791                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 792                 ipu_ch_param_set_field(&params, 1, 78, 7, 19);  /* burst size */
 793
 794                 ipu_ch_params_set_packing(&params, 8, 0, 8, 8, 8, 16, 8, 24);
 795                 break;
 796         case IPU_PIX_FMT_RGB24:
 797         case IPU_PIX_FMT_YUV444:
 798                 ipu_ch_param_set_field(&params, 0, 107, 3, 1);  /* bits/pixel */
 799                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 800                 ipu_ch_param_set_field(&params, 1, 78, 7, 19);  /* burst size */
 801
 802                 ipu_ch_params_set_packing(&params, 8, 16, 8, 8, 8, 0, 8, 24);
 803                 break;
 804         case IPU_PIX_FMT_BGRA32:
 805         case IPU_PIX_FMT_BGR32:
 806                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 807                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 808                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 809
 810                 ipu_ch_params_set_packing(&params, 8, 8, 8, 16, 8, 24, 8, 0);
 811                 break;
 812         case IPU_PIX_FMT_RGBA32:
 813         case IPU_PIX_FMT_RGB32:
 814                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 815                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 816                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 817
 818                 ipu_ch_params_set_packing(&params, 8, 24, 8, 16, 8, 8, 8, 0);
 819                 break;
 820         case IPU_PIX_FMT_ABGR32:
 821                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 822                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 823
 824                 ipu_ch_params_set_packing(&params, 8, 0, 8, 8, 8, 16, 8, 24);
 825                 break;
 826         case IPU_PIX_FMT_UYVY:
 827                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 828                 ipu_ch_param_set_field(&params, 1, 85, 4, 0xA); /* pix format */
 829                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 830                 break;
 831         case IPU_PIX_FMT_YUYV:
 832                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 833                 ipu_ch_param_set_field(&params, 1, 85, 4, 0x8); /* pix format */
 834                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 835                 break;
 836         case IPU_PIX_FMT_YUV420P2:
 837         case IPU_PIX_FMT_YUV420P:
 838                 ipu_ch_param_set_field(&params, 1, 85, 4, 2);   /* pix format */
 839
 840                 if (uv_stride < stride / 2)
 841                         uv_stride = stride / 2;
 842
 843                 u_offset = stride * height;
 844                 v_offset = u_offset + (uv_stride * height / 2);
 845                 /* burst size */
 846                 if ((ch == 8) || (ch == 9) || (ch == 10)) {
 847                         ipu_ch_param_set_field(&params, 1, 78, 7, 15);
 848                         uv_stride = uv_stride*2;
 849                 } else {
 850                         ipu_ch_param_set_field(&params, 1, 78, 7, 31);
 851                 }
 852                 break;
 853         case IPU_PIX_FMT_YVU422P:
 854                 /* BPP & pixel format */
 855                 ipu_ch_param_set_field(&params, 1, 85, 4, 1);   /* pix format */
 856                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 857
 858                 if (uv_stride < stride / 2)
 859                         uv_stride = stride / 2;
 860
 861                 v_offset = (v == 0) ? stride * height : v;
 862                 u_offset = (u == 0) ? v_offset + v_offset / 2 : u;
 863                 break;
 864         case IPU_PIX_FMT_YUV422P:
 865                 /* BPP & pixel format */
 866                 ipu_ch_param_set_field(&params, 1, 85, 4, 1);   /* pix format */
 867                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 868
 869                 if (uv_stride < stride / 2)
 870                         uv_stride = stride / 2;
 871
 872                 u_offset = (u == 0) ? stride * height : u;
 873                 v_offset = (v == 0) ? u_offset + u_offset / 2 : v;
 874                 break;
 875         case IPU_PIX_FMT_NV12:
 876                 /* BPP & pixel format */
 877                 ipu_ch_param_set_field(&params, 1, 85, 4, 4);   /* pix format */
 878                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 879                 uv_stride = stride;
 880                 u_offset = (u == 0) ? stride * height : u;
 881                 break;
 882         default:
 883                 printf("mxc ipu: unimplemented pixel format: %08x\n",
 884                         pixel_fmt);
 885         }
 886
 887
 888         if (uv_stride)
 889                 ipu_ch_param_set_field(&params, 1, 128, 14, uv_stride - 1);
 890
 891         /* Get the uv offset from user when need cropping */
 892         if (u || v) {
 893                 u_offset = u;
 894                 v_offset = v;
 895         }
 896
 897         /* UBO and VBO are 22-bit */
 898         if (u_offset/8 > 0x3fffff)
 899                 puts("The value of U offset exceeds IPU limitation\n");
 900         if (v_offset/8 > 0x3fffff)
 901                 puts("The value of V offset exceeds IPU limitation\n");
 902
 903         ipu_ch_param_set_field(&params, 0, 46, 22, u_offset / 8);
 904         ipu_ch_param_set_field(&params, 0, 68, 22, v_offset / 8);
 905
 906         debug("initializing idma ch %d @ %p\n", ch, ipu_ch_param_addr(ch));
 907         memcpy(ipu_ch_param_addr(ch), &params, sizeof(params));
 908 };
 909
 910 /*
 911  * This function is called to initialize a buffer for logical IPU channel.
 912  *
 913  * @param       channel         Input parameter for the logical channel ID.
 914  *
 915  * @param       type            Input parameter which buffer to initialize.
 916  *
 917  * @param       pixel_fmt       Input parameter for pixel format of buffer.
 918  *                              Pixel format is a FOURCC ASCII code.
 919  *
 920  * @param       width           Input parameter for width of buffer in pixels.
 921  *
 922  * @param       height          Input parameter for height of buffer in pixels.
 923  *
 924  * @param       stride          Input parameter for stride length of buffer
 925  *                              in pixels.
 926  *
 927  * @param       phyaddr_0       Input parameter buffer 0 physical address.
 928  *
 929  * @param       phyaddr_1       Input parameter buffer 1 physical address.
 930  *                              Setting this to a value other than NULL enables
 931  *                              double buffering mode.
 932  *
 933  * @param       u               private u offset for additional cropping,
 934  *                              zero if not used.
 935  *
 936  * @param       v               private v offset for additional cropping,
 937  *                              zero if not used.
 938  *
 939  * @return      Returns 0 on success or negative error code on fail
 940  */
 941 int32_t ipu_init_channel_buffer(ipu_channel_t channel, ipu_buffer_t type,
 942                                 uint32_t pixel_fmt,
 943                                 uint16_t width, uint16_t height,
 944                                 uint32_t stride,
 945                                 dma_addr_t phyaddr_0, dma_addr_t phyaddr_1,
 946                                 uint32_t u, uint32_t v)
 947 {
 948         uint32_t reg;
 949         uint32_t dma_chan;
 950
 951         dma_chan = channel_2_dma(channel, type);
 952         if (!idma_is_valid(dma_chan))
 953                 return -EINVAL;
 954
 955         if (stride < width * bytes_per_pixel(pixel_fmt))
 956                 stride = width * bytes_per_pixel(pixel_fmt);
 957
 958         if (stride % 4) {
 959                 printf("Stride not 32-bit aligned, stride = %d\n", stride);
 960                 return -EINVAL;
 961         }
 962         /* Build parameter memory data for DMA channel */
 963         ipu_ch_param_init(dma_chan, pixel_fmt, width, height, stride, u, v, 0,
 964                            phyaddr_0, phyaddr_1);
 965
 966         if (ipu_is_dmfc_chan(dma_chan)) {
 967                 ipu_dmfc_set_wait4eot(dma_chan, width);
 968         }
 969
 970         if (idma_is_set(IDMAC_CHA_PRI, dma_chan))
 971                 ipu_ch_param_set_high_priority(dma_chan);
 972
 973         ipu_ch_param_dump(dma_chan);
 974
 975         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(dma_chan));
 976         if (phyaddr_1)
 977                 reg |= idma_mask(dma_chan);
 978         else
 979                 reg &= ~idma_mask(dma_chan);
 980         __raw_writel(reg, IPU_CHA_DB_MODE_SEL(dma_chan));
 981
 982         /* Reset to buffer 0 */
 983         __raw_writel(idma_mask(dma_chan), IPU_CHA_CUR_BUF(dma_chan));
 984
 985         return 0;
 986 }
 987
 988 /*
 989  * This function enables a logical channel.
 990  *
 991  * @param       channel         Input parameter for the logical channel ID.
 992  *
 993  * @return      This function returns 0 on success or negative error code on
 994  *              fail.
 995  */
 996 int32_t ipu_enable_channel(ipu_channel_t channel)
 997 {
 998         uint32_t reg;
 999         uint32_t in_dma;
1000         uint32_t out_dma;
1001
1002         if (g_channel_enable_mask & (1L << IPU_CHAN_ID(channel))) {
1003                 printf("Warning: channel already enabled %d\n",
1004                         IPU_CHAN_ID(channel));
1005         }
1006
1007         /* Get input and output dma channels */
1008         out_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
1009         in_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
1010
1011         if (idma_is_valid(in_dma)) {
1012                 reg = __raw_readl(IDMAC_CHA_EN(in_dma));
1013                 __raw_writel(reg | idma_mask(in_dma), IDMAC_CHA_EN(in_dma));
1014         }
1015         if (idma_is_valid(out_dma)) {
1016                 reg = __raw_readl(IDMAC_CHA_EN(out_dma));
1017                 __raw_writel(reg | idma_mask(out_dma), IDMAC_CHA_EN(out_dma));
1018         }
1019
1020         if ((channel == MEM_DC_SYNC) || (channel == MEM_BG_SYNC) ||
1021             (channel == MEM_FG_SYNC))
1022                 ipu_dp_dc_enable(channel);
1023
1024         g_channel_enable_mask |= 1L << IPU_CHAN_ID(channel);
1025
1026         return 0;
1027 }
1028
1029 /*
1030  * This function clear buffer ready for a logical channel.
1031  *
1032  * @param       channel         Input parameter for the logical channel ID.
1033  *
1034  * @param       type            Input parameter which buffer to clear.
1035  *
1036  * @param       bufNum          Input parameter for which buffer number clear
1037  *                              ready state.
1038  *
1039  */
1040 void ipu_clear_buffer_ready(ipu_channel_t channel, ipu_buffer_t type,
1041                 uint32_t bufNum)
1042 {
1043         uint32_t dma_ch = channel_2_dma(channel, type);
1044
1045         if (!idma_is_valid(dma_ch))
1046                 return;
1047
1048         __raw_writel(0xF0000000, IPU_GPR); /* write one to clear */
1049         if (bufNum == 0) {
1050                 if (idma_is_set(IPU_CHA_BUF0_RDY, dma_ch)) {
1051                         __raw_writel(idma_mask(dma_ch),
1052                                         IPU_CHA_BUF0_RDY(dma_ch));
1053                 }
1054         } else {
1055                 if (idma_is_set(IPU_CHA_BUF1_RDY, dma_ch)) {
1056                         __raw_writel(idma_mask(dma_ch),
1057                                         IPU_CHA_BUF1_RDY(dma_ch));
1058                 }
1059         }
1060         __raw_writel(0x0, IPU_GPR); /* write one to set */
1061 }
1062
1063 /*
1064  * This function disables a logical channel.
1065  *
1066  * @param       channel         Input parameter for the logical channel ID.
1067  *
1068  * @param       wait_for_stop   Flag to set whether to wait for channel end
1069  *                              of frame or return immediately.
1070  *
1071  * @return      This function returns 0 on success or negative error code on
1072  *              fail.
1073  */
1074 int32_t ipu_disable_channel(ipu_channel_t channel)
1075 {
1076         uint32_t reg;
1077         uint32_t in_dma;
1078         uint32_t out_dma;
1079
1080         if ((g_channel_enable_mask & (1L << IPU_CHAN_ID(channel))) == 0) {
1081                 debug("Channel already disabled %d\n",
1082                         IPU_CHAN_ID(channel));
1083                 return 0;
1084         }
1085
1086         /* Get input and output dma channels */
1087         out_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
1088         in_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
1089
1090         if ((idma_is_valid(in_dma) &&
1091                 !idma_is_set(IDMAC_CHA_EN, in_dma))
1092                 && (idma_is_valid(out_dma) &&
1093                 !idma_is_set(IDMAC_CHA_EN, out_dma)))
1094                 return -EINVAL;
1095
1096         if ((channel == MEM_BG_SYNC) || (channel == MEM_FG_SYNC) ||
1097             (channel == MEM_DC_SYNC)) {
1098                 ipu_dp_dc_disable(channel, 0);
1099         }
1100
1101         /* Disable DMA channel(s) */
1102         if (idma_is_valid(in_dma)) {
1103                 reg = __raw_readl(IDMAC_CHA_EN(in_dma));
1104                 __raw_writel(reg & ~idma_mask(in_dma), IDMAC_CHA_EN(in_dma));
1105                 __raw_writel(idma_mask(in_dma), IPU_CHA_CUR_BUF(in_dma));
1106         }
1107         if (idma_is_valid(out_dma)) {
1108                 reg = __raw_readl(IDMAC_CHA_EN(out_dma));
1109                 __raw_writel(reg & ~idma_mask(out_dma), IDMAC_CHA_EN(out_dma));
1110                 __raw_writel(idma_mask(out_dma), IPU_CHA_CUR_BUF(out_dma));
1111         }
1112
1113         g_channel_enable_mask &= ~(1L << IPU_CHAN_ID(channel));
1114
1115         /* Set channel buffers NOT to be ready */
1116         if (idma_is_valid(in_dma)) {
1117                 ipu_clear_buffer_ready(channel, IPU_VIDEO_IN_BUFFER, 0);
1118                 ipu_clear_buffer_ready(channel, IPU_VIDEO_IN_BUFFER, 1);
1119         }
1120         if (idma_is_valid(out_dma)) {
1121                 ipu_clear_buffer_ready(channel, IPU_OUTPUT_BUFFER, 0);
1122                 ipu_clear_buffer_ready(channel, IPU_OUTPUT_BUFFER, 1);
1123         }
1124
1125         return 0;
1126 }
1127
1128 uint32_t bytes_per_pixel(uint32_t fmt)
1129 {
1130         switch (fmt) {
1131         case IPU_PIX_FMT_GENERIC:       /* generic data */
1132         case IPU_PIX_FMT_RGB332:
1133         case IPU_PIX_FMT_YUV420P:
1134         case IPU_PIX_FMT_YUV422P:
1135                 return 1;
1136         case IPU_PIX_FMT_RGB565:
1137         case IPU_PIX_FMT_YUYV:
1138         case IPU_PIX_FMT_UYVY:
1139                 return 2;
1140         case IPU_PIX_FMT_BGR24:
1141         case IPU_PIX_FMT_RGB24:
1142                 return 3;
1143         case IPU_PIX_FMT_GENERIC_32:    /* generic data */
1144         case IPU_PIX_FMT_BGR32:
1145         case IPU_PIX_FMT_BGRA32:
1146         case IPU_PIX_FMT_RGB32:
1147         case IPU_PIX_FMT_RGBA32:
1148         case IPU_PIX_FMT_ABGR32:
1149                 return 4;
1150         default:
1151                 return 1;
1152         }
1153         return 0;
1154 }
1155
1156 ipu_color_space_t format_to_colorspace(uint32_t fmt)
1157 {
1158         switch (fmt) {
1159         case IPU_PIX_FMT_RGB666:
1160         case IPU_PIX_FMT_RGB565:
1161         case IPU_PIX_FMT_BGR24:
1162         case IPU_PIX_FMT_RGB24:
1163         case IPU_PIX_FMT_BGR32:
1164         case IPU_PIX_FMT_BGRA32:
1165         case IPU_PIX_FMT_RGB32:
1166         case IPU_PIX_FMT_RGBA32:
1167         case IPU_PIX_FMT_ABGR32:
1168         case IPU_PIX_FMT_LVDS666:
1169         case IPU_PIX_FMT_LVDS888:
1170                 return RGB;
1171
1172         default:
1173                 return YCbCr;
1174         }
1175         return RGB;
1176 }