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  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 /* #define DEBUG */
  15 #include <common.h>
  16 #include <linux/types.h>
  17 #include <linux/err.h>
  18 #include <asm/io.h>
  19 #include <linux/errno.h>
  20 #include <asm/arch/imx-regs.h>
  21 #include <asm/arch/crm_regs.h>
  22 #include <asm/arch/sys_proto.h>
  23 #include <div64.h>
  24 #include "ipu.h"
  25 #include "ipu_regs.h"
  26
  27 extern struct mxc_ccm_reg *mxc_ccm;
  28 extern u32 *ipu_cpmem_base;
  29
  30 struct ipu_ch_param_word {
  31         uint32_t data[5];
  32         uint32_t res[3];
  33 };
  34
  35 struct ipu_ch_param {
  36         struct ipu_ch_param_word word[2];
  37 };
  38
  39 #define ipu_ch_param_addr(ch) (((struct ipu_ch_param *)ipu_cpmem_base) + (ch))
  40
  41 #define _param_word(base, w) \
  42         (((struct ipu_ch_param *)(base))->word[(w)].data)
  43
  44 #define ipu_ch_param_set_field(base, w, bit, size, v) { \
  45         int i = (bit) / 32; \
  46         int off = (bit) % 32; \
  47         _param_word(base, w)[i] |= (v) << off; \
  48         if (((bit) + (size) - 1) / 32 > i) { \
  49                 _param_word(base, w)[i + 1] |= (v) >> (off ? (32 - off) : 0); \
  50         } \
  51 }
  52
  53 #define ipu_ch_param_mod_field(base, w, bit, size, v) { \
  54         int i = (bit) / 32; \
  55         int off = (bit) % 32; \
  56         u32 mask = (1UL << size) - 1; \
  57         u32 temp = _param_word(base, w)[i]; \
  58         temp &= ~(mask << off); \
  59         _param_word(base, w)[i] = temp | (v) << off; \
  60         if (((bit) + (size) - 1) / 32 > i) { \
  61                 temp = _param_word(base, w)[i + 1]; \
  62                 temp &= ~(mask >> (32 - off)); \
  63                 _param_word(base, w)[i + 1] = \
  64                         temp | ((v) >> (off ? (32 - off) : 0)); \
  65         } \
  66 }
  67
  68 #define ipu_ch_param_read_field(base, w, bit, size) ({ \
  69         u32 temp2; \
  70         int i = (bit) / 32; \
  71         int off = (bit) % 32; \
  72         u32 mask = (1UL << size) - 1; \
  73         u32 temp1 = _param_word(base, w)[i]; \
  74         temp1 = mask & (temp1 >> off); \
  75         if (((bit)+(size) - 1) / 32 > i) { \
  76                 temp2 = _param_word(base, w)[i + 1]; \
  77                 temp2 &= mask >> (off ? (32 - off) : 0); \
  78                 temp1 |= temp2 << (off ? (32 - off) : 0); \
  79         } \
  80         temp1; \
  81 })
  82
  83 #define IPU_SW_RST_TOUT_USEC    (10000)
  84
  85 #define IPUV3_CLK_MX51          133000000
  86 #define IPUV3_CLK_MX53          200000000
  87 #define IPUV3_CLK_MX6Q          264000000
  88 #define IPUV3_CLK_MX6DL         198000000
  89
  90 void clk_enable(struct clk *clk)
  91 {
  92         if (clk) {
  93                 if (clk->usecount++ == 0) {
  94                         clk->enable(clk);
  95                 }
  96         }
  97 }
  98
  99 void clk_disable(struct clk *clk)
 100 {
 101         if (clk) {
 102                 if (!(--clk->usecount)) {
 103                         if (clk->disable)
 104                                 clk->disable(clk);
 105                 }
 106         }
 107 }
 108
 109 int clk_get_usecount(struct clk *clk)
 110 {
 111         if (clk == NULL)
 112                 return 0;
 113
 114         return clk->usecount;
 115 }
 116
 117 u32 clk_get_rate(struct clk *clk)
 118 {
 119         if (!clk)
 120                 return 0;
 121
 122         return clk->rate;
 123 }
 124
 125 struct clk *clk_get_parent(struct clk *clk)
 126 {
 127         if (!clk)
 128                 return 0;
 129
 130         return clk->parent;
 131 }
 132
 133 int clk_set_rate(struct clk *clk, unsigned long rate)
 134 {
 135         if (clk && clk->set_rate)
 136                 clk->set_rate(clk, rate);
 137         return clk->rate;
 138 }
 139
 140 long clk_round_rate(struct clk *clk, unsigned long rate)
 141 {
 142         if (clk == NULL || !clk->round_rate)
 143                 return 0;
 144
 145         return clk->round_rate(clk, rate);
 146 }
 147
 148 int clk_set_parent(struct clk *clk, struct clk *parent)
 149 {
 150         clk->parent = parent;
 151         if (clk->set_parent)
 152                 return clk->set_parent(clk, parent);
 153         return 0;
 154 }
 155
 156 static int clk_ipu_enable(struct clk *clk)
 157 {
 158         u32 reg;
 159
 160         reg = __raw_readl(clk->enable_reg);
 161         reg |= MXC_CCM_CCGR_CG_MASK << clk->enable_shift;
 162         __raw_writel(reg, clk->enable_reg);
 163
 164 #if defined(CONFIG_MX51) || defined(CONFIG_MX53)
 165         /* Handshake with IPU when certain clock rates are changed. */
 166         reg = __raw_readl(&mxc_ccm->ccdr);
 167         reg &= ~MXC_CCM_CCDR_IPU_HS_MASK;
 168         __raw_writel(reg, &mxc_ccm->ccdr);
 169
 170         /* Handshake with IPU when LPM is entered as its enabled. */
 171         reg = __raw_readl(&mxc_ccm->clpcr);
 172         reg &= ~MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
 173         __raw_writel(reg, &mxc_ccm->clpcr);
 174 #endif
 175         return 0;
 176 }
 177
 178 static void clk_ipu_disable(struct clk *clk)
 179 {
 180         u32 reg;
 181
 182         reg = __raw_readl(clk->enable_reg);
 183         reg &= ~(MXC_CCM_CCGR_CG_MASK << clk->enable_shift);
 184         __raw_writel(reg, clk->enable_reg);
 185
 186 #if defined(CONFIG_MX51) || defined(CONFIG_MX53)
 187         /*
 188          * No handshake with IPU whe dividers are changed
 189          * as its not enabled.
 190          */
 191         reg = __raw_readl(&mxc_ccm->ccdr);
 192         reg |= MXC_CCM_CCDR_IPU_HS_MASK;
 193         __raw_writel(reg, &mxc_ccm->ccdr);
 194
 195         /* No handshake with IPU when LPM is entered as its not enabled. */
 196         reg = __raw_readl(&mxc_ccm->clpcr);
 197         reg |= MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
 198         __raw_writel(reg, &mxc_ccm->clpcr);
 199 #endif
 200 }
 201
 202
 203 static struct clk ipu_clk = {
 204         .name = "ipu_clk",
 205 #if defined(CONFIG_MX51) || defined(CONFIG_MX53)
 206         .enable_reg = (u32 *)(CCM_BASE_ADDR +
 207                 offsetof(struct mxc_ccm_reg, CCGR5)),
 208         .enable_shift = MXC_CCM_CCGR5_IPU_OFFSET,
 209 #else
 210         .enable_reg = (u32 *)(CCM_BASE_ADDR +
 211                 offsetof(struct mxc_ccm_reg, CCGR3)),
 212         .enable_shift = MXC_CCM_CCGR3_IPU1_IPU_DI0_OFFSET,
 213 #endif
 214         .enable = clk_ipu_enable,
 215         .disable = clk_ipu_disable,
 216         .usecount = 0,
 217 };
 218
 219 #if !defined CONFIG_SYS_LDB_CLOCK
 220 #define CONFIG_SYS_LDB_CLOCK 65000000
 221 #endif
 222
 223 static struct clk ldb_clk = {
 224         .name = "ldb_clk",
 225         .rate = CONFIG_SYS_LDB_CLOCK,
 226         .usecount = 0,
 227 };
 228
 229 /* Globals */
 230 struct clk *g_ipu_clk;
 231 struct clk *g_ldb_clk;
 232 unsigned char g_ipu_clk_enabled;
 233 struct clk *g_di_clk[2];
 234 struct clk *g_pixel_clk[2];
 235 unsigned char g_dc_di_assignment[10];
 236 uint32_t g_channel_init_mask;
 237 uint32_t g_channel_enable_mask;
 238
 239 static int ipu_dc_use_count;
 240 static int ipu_dp_use_count;
 241 static int ipu_dmfc_use_count;
 242 static int ipu_di_use_count[2];
 243
 244 u32 *ipu_cpmem_base;
 245 u32 *ipu_dc_tmpl_reg;
 246
 247 /* Static functions */
 248
 249 static inline void ipu_ch_param_set_high_priority(uint32_t ch)
 250 {
 251         ipu_ch_param_mod_field(ipu_ch_param_addr(ch), 1, 93, 2, 1);
 252 };
 253
 254 static inline uint32_t channel_2_dma(ipu_channel_t ch, ipu_buffer_t type)
 255 {
 256         return ((uint32_t) ch >> (6 * type)) & 0x3F;
 257 };
 258
 259 /* Either DP BG or DP FG can be graphic window */
 260 static inline int ipu_is_dp_graphic_chan(uint32_t dma_chan)
 261 {
 262         return (dma_chan == 23 || dma_chan == 27);
 263 }
 264
 265 static inline int ipu_is_dmfc_chan(uint32_t dma_chan)
 266 {
 267         return ((dma_chan >= 23) && (dma_chan <= 29));
 268 }
 269
 270
 271 static inline void ipu_ch_param_set_buffer(uint32_t ch, int bufNum,
 272                                             dma_addr_t phyaddr)
 273 {
 274         ipu_ch_param_mod_field(ipu_ch_param_addr(ch), 1, 29 * bufNum, 29,
 275                                phyaddr / 8);
 276 };
 277
 278 #define idma_is_valid(ch)       (ch != NO_DMA)
 279 #define idma_mask(ch)           (idma_is_valid(ch) ? (1UL << (ch & 0x1F)) : 0)
 280 #define idma_is_set(reg, dma)   (__raw_readl(reg(dma)) & idma_mask(dma))
 281
 282 static void ipu_pixel_clk_recalc(struct clk *clk)
 283 {
 284         u32 div;
 285         u64 final_rate = (unsigned long long)clk->parent->rate * 16;
 286
 287         div = __raw_readl(DI_BS_CLKGEN0(clk->id));
 288         debug("read BS_CLKGEN0 div:%d, final_rate:%lld, prate:%ld\n",
 289               div, final_rate, clk->parent->rate);
 290
 291         clk->rate = 0;
 292         if (div != 0) {
 293                 do_div(final_rate, div);
 294                 clk->rate = final_rate;
 295         }
 296 }
 297
 298 static unsigned long ipu_pixel_clk_round_rate(struct clk *clk,
 299         unsigned long rate)
 300 {
 301         u64 div, final_rate;
 302         u32 remainder;
 303         u64 parent_rate = (unsigned long long)clk->parent->rate * 16;
 304
 305         /*
 306          * Calculate divider
 307          * Fractional part is 4 bits,
 308          * so simply multiply by 2^4 to get fractional part.
 309          */
 310         div = parent_rate;
 311         remainder = do_div(div, rate);
 312         /* Round the divider value */
 313         if (remainder > (rate / 2))
 314                 div++;
 315         if (div < 0x10)            /* Min DI disp clock divider is 1 */
 316                 div = 0x10;
 317         if (div & ~0xFEF)
 318                 div &= 0xFF8;
 319         else {
 320                 /* Round up divider if it gets us closer to desired pix clk */
 321                 if ((div & 0xC) == 0xC) {
 322                         div += 0x10;
 323                         div &= ~0xF;
 324                 }
 325         }
 326         final_rate = parent_rate;
 327         do_div(final_rate, div);
 328
 329         return final_rate;
 330 }
 331
 332 static int ipu_pixel_clk_set_rate(struct clk *clk, unsigned long rate)
 333 {
 334         u64 div, parent_rate;
 335         u32 remainder;
 336
 337         parent_rate = (unsigned long long)clk->parent->rate * 16;
 338         div = parent_rate;
 339         remainder = do_div(div, rate);
 340         /* Round the divider value */
 341         if (remainder > (rate / 2))
 342                 div++;
 343
 344         /* Round up divider if it gets us closer to desired pix clk */
 345         if ((div & 0xC) == 0xC) {
 346                 div += 0x10;
 347                 div &= ~0xF;
 348         }
 349         if (div > 0x1000)
 350                 debug("Overflow, DI_BS_CLKGEN0 div:0x%x\n", (u32)div);
 351
 352         __raw_writel(div, DI_BS_CLKGEN0(clk->id));
 353
 354         /*
 355          * Setup pixel clock timing
 356          * Down time is half of period
 357          */
 358         __raw_writel((div / 16) << 16, DI_BS_CLKGEN1(clk->id));
 359
 360         do_div(parent_rate, div);
 361
 362         clk->rate = parent_rate;
 363
 364         return 0;
 365 }
 366
 367 static int ipu_pixel_clk_enable(struct clk *clk)
 368 {
 369         u32 disp_gen = __raw_readl(IPU_DISP_GEN);
 370         disp_gen |= clk->id ? DI1_COUNTER_RELEASE : DI0_COUNTER_RELEASE;
 371         __raw_writel(disp_gen, IPU_DISP_GEN);
 372
 373         return 0;
 374 }
 375
 376 static void ipu_pixel_clk_disable(struct clk *clk)
 377 {
 378         u32 disp_gen = __raw_readl(IPU_DISP_GEN);
 379         disp_gen &= clk->id ? ~DI1_COUNTER_RELEASE : ~DI0_COUNTER_RELEASE;
 380         __raw_writel(disp_gen, IPU_DISP_GEN);
 381
 382 }
 383
 384 static int ipu_pixel_clk_set_parent(struct clk *clk, struct clk *parent)
 385 {
 386         u32 di_gen = __raw_readl(DI_GENERAL(clk->id));
 387
 388         if (parent == g_ipu_clk)
 389                 di_gen &= ~DI_GEN_DI_CLK_EXT;
 390         else if (!IS_ERR(g_di_clk[clk->id]) && parent == g_ldb_clk)
 391                 di_gen |= DI_GEN_DI_CLK_EXT;
 392         else
 393                 return -EINVAL;
 394
 395         __raw_writel(di_gen, DI_GENERAL(clk->id));
 396         ipu_pixel_clk_recalc(clk);
 397         return 0;
 398 }
 399
 400 static struct clk pixel_clk[] = {
 401         {
 402         .name = "pixel_clk",
 403         .id = 0,
 404         .recalc = ipu_pixel_clk_recalc,
 405         .set_rate = ipu_pixel_clk_set_rate,
 406         .round_rate = ipu_pixel_clk_round_rate,
 407         .set_parent = ipu_pixel_clk_set_parent,
 408         .enable = ipu_pixel_clk_enable,
 409         .disable = ipu_pixel_clk_disable,
 410         .usecount = 0,
 411         },
 412         {
 413         .name = "pixel_clk",
 414         .id = 1,
 415         .recalc = ipu_pixel_clk_recalc,
 416         .set_rate = ipu_pixel_clk_set_rate,
 417         .round_rate = ipu_pixel_clk_round_rate,
 418         .set_parent = ipu_pixel_clk_set_parent,
 419         .enable = ipu_pixel_clk_enable,
 420         .disable = ipu_pixel_clk_disable,
 421         .usecount = 0,
 422         },
 423 };
 424
 425 /*
 426  * This function resets IPU
 427  */
 428 static void ipu_reset(void)
 429 {
 430         u32 *reg;
 431         u32 value;
 432         int timeout = IPU_SW_RST_TOUT_USEC;
 433
 434         reg = (u32 *)SRC_BASE_ADDR;
 435         value = __raw_readl(reg);
 436         value = value | SW_IPU_RST;
 437         __raw_writel(value, reg);
 438
 439         while (__raw_readl(reg) & SW_IPU_RST) {
 440                 udelay(1);
 441                 if (!(timeout--)) {
 442                         printf("ipu software reset timeout\n");
 443                         break;
 444                 }
 445         };
 446 }
 447
 448 /*
 449  * This function is called by the driver framework to initialize the IPU
 450  * hardware.
 451  *
 452  * @param       dev     The device structure for the IPU passed in by the
 453  *                      driver framework.
 454  *
 455  * @return      Returns 0 on success or negative error code on error
 456  */
 457 int ipu_probe(void)
 458 {
 459         unsigned long ipu_base;
 460 #if defined CONFIG_MX51
 461         u32 temp;
 462
 463         u32 *reg_hsc_mcd = (u32 *)MIPI_HSC_BASE_ADDR;
 464         u32 *reg_hsc_mxt_conf = (u32 *)(MIPI_HSC_BASE_ADDR + 0x800);
 465
 466          __raw_writel(0xF00, reg_hsc_mcd);
 467
 468         /* CSI mode reserved*/
 469         temp = __raw_readl(reg_hsc_mxt_conf);
 470          __raw_writel(temp | 0x0FF, reg_hsc_mxt_conf);
 471
 472         temp = __raw_readl(reg_hsc_mxt_conf);
 473         __raw_writel(temp | 0x10000, reg_hsc_mxt_conf);
 474 #endif
 475
 476         ipu_base = IPU_CTRL_BASE_ADDR;
 477         ipu_cpmem_base = (u32 *)(ipu_base + IPU_CPMEM_REG_BASE);
 478         ipu_dc_tmpl_reg = (u32 *)(ipu_base + IPU_DC_TMPL_REG_BASE);
 479
 480         g_pixel_clk[0] = &pixel_clk[0];
 481         g_pixel_clk[1] = &pixel_clk[1];
 482
 483         g_ipu_clk = &ipu_clk;
 484 #if defined(CONFIG_MX51)
 485         g_ipu_clk->rate = IPUV3_CLK_MX51;
 486 #elif defined(CONFIG_MX53)
 487         g_ipu_clk->rate = IPUV3_CLK_MX53;
 488 #else
 489         g_ipu_clk->rate = is_mx6sdl() ? IPUV3_CLK_MX6DL : IPUV3_CLK_MX6Q;
 490 #endif
 491         debug("ipu_clk = %u\n", clk_get_rate(g_ipu_clk));
 492         g_ldb_clk = &ldb_clk;
 493         debug("ldb_clk = %u\n", clk_get_rate(g_ldb_clk));
 494         ipu_reset();
 495
 496         clk_set_parent(g_pixel_clk[0], g_ipu_clk);
 497         clk_set_parent(g_pixel_clk[1], g_ipu_clk);
 498         clk_enable(g_ipu_clk);
 499
 500         g_di_clk[0] = NULL;
 501         g_di_clk[1] = NULL;
 502
 503         __raw_writel(0x807FFFFF, IPU_MEM_RST);
 504         while (__raw_readl(IPU_MEM_RST) & 0x80000000)
 505                 ;
 506
 507         ipu_init_dc_mappings();
 508
 509         __raw_writel(0, IPU_INT_CTRL(5));
 510         __raw_writel(0, IPU_INT_CTRL(6));
 511         __raw_writel(0, IPU_INT_CTRL(9));
 512         __raw_writel(0, IPU_INT_CTRL(10));
 513
 514         /* DMFC Init */
 515         ipu_dmfc_init(DMFC_NORMAL, 1);
 516
 517         /* Set sync refresh channels as high priority */
 518         __raw_writel(0x18800000L, IDMAC_CHA_PRI(0));
 519
 520         /* Set MCU_T to divide MCU access window into 2 */
 521         __raw_writel(0x00400000L | (IPU_MCU_T_DEFAULT << 18), IPU_DISP_GEN);
 522
 523         clk_disable(g_ipu_clk);
 524
 525         return 0;
 526 }
 527
 528 void ipu_dump_registers(void)
 529 {
 530         debug("IPU_CONF = \t0x%08X\n", __raw_readl(IPU_CONF));
 531         debug("IDMAC_CONF = \t0x%08X\n", __raw_readl(IDMAC_CONF));
 532         debug("IDMAC_CHA_EN1 = \t0x%08X\n",
 533                __raw_readl(IDMAC_CHA_EN(0)));
 534         debug("IDMAC_CHA_EN2 = \t0x%08X\n",
 535                __raw_readl(IDMAC_CHA_EN(32)));
 536         debug("IDMAC_CHA_PRI1 = \t0x%08X\n",
 537                __raw_readl(IDMAC_CHA_PRI(0)));
 538         debug("IDMAC_CHA_PRI2 = \t0x%08X\n",
 539                __raw_readl(IDMAC_CHA_PRI(32)));
 540         debug("IPU_CHA_DB_MODE_SEL0 = \t0x%08X\n",
 541                __raw_readl(IPU_CHA_DB_MODE_SEL(0)));
 542         debug("IPU_CHA_DB_MODE_SEL1 = \t0x%08X\n",
 543                __raw_readl(IPU_CHA_DB_MODE_SEL(32)));
 544         debug("DMFC_WR_CHAN = \t0x%08X\n",
 545                __raw_readl(DMFC_WR_CHAN));
 546         debug("DMFC_WR_CHAN_DEF = \t0x%08X\n",
 547                __raw_readl(DMFC_WR_CHAN_DEF));
 548         debug("DMFC_DP_CHAN = \t0x%08X\n",
 549                __raw_readl(DMFC_DP_CHAN));
 550         debug("DMFC_DP_CHAN_DEF = \t0x%08X\n",
 551                __raw_readl(DMFC_DP_CHAN_DEF));
 552         debug("DMFC_IC_CTRL = \t0x%08X\n",
 553                __raw_readl(DMFC_IC_CTRL));
 554         debug("IPU_FS_PROC_FLOW1 = \t0x%08X\n",
 555                __raw_readl(IPU_FS_PROC_FLOW1));
 556         debug("IPU_FS_PROC_FLOW2 = \t0x%08X\n",
 557                __raw_readl(IPU_FS_PROC_FLOW2));
 558         debug("IPU_FS_PROC_FLOW3 = \t0x%08X\n",
 559                __raw_readl(IPU_FS_PROC_FLOW3));
 560         debug("IPU_FS_DISP_FLOW1 = \t0x%08X\n",
 561                __raw_readl(IPU_FS_DISP_FLOW1));
 562 }
 563
 564 /*
 565  * This function is called to initialize a logical IPU channel.
 566  *
 567  * @param       channel Input parameter for the logical channel ID to init.
 568  *
 569  * @param       params  Input parameter containing union of channel
 570  *                      initialization parameters.
 571  *
 572  * @return      Returns 0 on success or negative error code on fail
 573  */
 574 int32_t ipu_init_channel(ipu_channel_t channel, ipu_channel_params_t *params)
 575 {
 576         int ret = 0;
 577         uint32_t ipu_conf;
 578
 579         debug("init channel = %d\n", IPU_CHAN_ID(channel));
 580
 581         if (g_ipu_clk_enabled == 0) {
 582                 g_ipu_clk_enabled = 1;
 583                 clk_enable(g_ipu_clk);
 584         }
 585
 586
 587         if (g_channel_init_mask & (1L << IPU_CHAN_ID(channel))) {
 588                 printf("Warning: channel already initialized %d\n",
 589                         IPU_CHAN_ID(channel));
 590         }
 591
 592         ipu_conf = __raw_readl(IPU_CONF);
 593
 594         switch (channel) {
 595         case MEM_DC_SYNC:
 596                 if (params->mem_dc_sync.di > 1) {
 597                         ret = -EINVAL;
 598                         goto err;
 599                 }
 600
 601                 g_dc_di_assignment[1] = params->mem_dc_sync.di;
 602                 ipu_dc_init(1, params->mem_dc_sync.di,
 603                              params->mem_dc_sync.interlaced);
 604                 ipu_di_use_count[params->mem_dc_sync.di]++;
 605                 ipu_dc_use_count++;
 606                 ipu_dmfc_use_count++;
 607                 break;
 608         case MEM_BG_SYNC:
 609                 if (params->mem_dp_bg_sync.di > 1) {
 610                         ret = -EINVAL;
 611                         goto err;
 612                 }
 613
 614                 g_dc_di_assignment[5] = params->mem_dp_bg_sync.di;
 615                 ipu_dp_init(channel, params->mem_dp_bg_sync.in_pixel_fmt,
 616                              params->mem_dp_bg_sync.out_pixel_fmt);
 617                 ipu_dc_init(5, params->mem_dp_bg_sync.di,
 618                              params->mem_dp_bg_sync.interlaced);
 619                 ipu_di_use_count[params->mem_dp_bg_sync.di]++;
 620                 ipu_dc_use_count++;
 621                 ipu_dp_use_count++;
 622                 ipu_dmfc_use_count++;
 623                 break;
 624         case MEM_FG_SYNC:
 625                 ipu_dp_init(channel, params->mem_dp_fg_sync.in_pixel_fmt,
 626                              params->mem_dp_fg_sync.out_pixel_fmt);
 627
 628                 ipu_dc_use_count++;
 629                 ipu_dp_use_count++;
 630                 ipu_dmfc_use_count++;
 631                 break;
 632         default:
 633                 printf("Missing channel initialization\n");
 634                 break;
 635         }
 636
 637         /* Enable IPU sub module */
 638         g_channel_init_mask |= 1L << IPU_CHAN_ID(channel);
 639         if (ipu_dc_use_count == 1)
 640                 ipu_conf |= IPU_CONF_DC_EN;
 641         if (ipu_dp_use_count == 1)
 642                 ipu_conf |= IPU_CONF_DP_EN;
 643         if (ipu_dmfc_use_count == 1)
 644                 ipu_conf |= IPU_CONF_DMFC_EN;
 645         if (ipu_di_use_count[0] == 1) {
 646                 ipu_conf |= IPU_CONF_DI0_EN;
 647         }
 648         if (ipu_di_use_count[1] == 1) {
 649                 ipu_conf |= IPU_CONF_DI1_EN;
 650         }
 651
 652         __raw_writel(ipu_conf, IPU_CONF);
 653
 654 err:
 655         return ret;
 656 }
 657
 658 /*
 659  * This function is called to uninitialize a logical IPU channel.
 660  *
 661  * @param       channel Input parameter for the logical channel ID to uninit.
 662  */
 663 void ipu_uninit_channel(ipu_channel_t channel)
 664 {
 665         uint32_t reg;
 666         uint32_t in_dma, out_dma = 0;
 667         uint32_t ipu_conf;
 668
 669         if ((g_channel_init_mask & (1L << IPU_CHAN_ID(channel))) == 0) {
 670                 debug("Channel already uninitialized %d\n",
 671                         IPU_CHAN_ID(channel));
 672                 return;
 673         }
 674
 675         /*
 676          * Make sure channel is disabled
 677          * Get input and output dma channels
 678          */
 679         in_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
 680         out_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
 681
 682         if (idma_is_set(IDMAC_CHA_EN, in_dma) ||
 683             idma_is_set(IDMAC_CHA_EN, out_dma)) {
 684                 printf(
 685                         "Channel %d is not disabled, disable first\n",
 686                         IPU_CHAN_ID(channel));
 687                 return;
 688         }
 689
 690         ipu_conf = __raw_readl(IPU_CONF);
 691
 692         /* Reset the double buffer */
 693         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(in_dma));
 694         __raw_writel(reg & ~idma_mask(in_dma), IPU_CHA_DB_MODE_SEL(in_dma));
 695         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(out_dma));
 696         __raw_writel(reg & ~idma_mask(out_dma), IPU_CHA_DB_MODE_SEL(out_dma));
 697
 698         switch (channel) {
 699         case MEM_DC_SYNC:
 700                 ipu_dc_uninit(1);
 701                 ipu_di_use_count[g_dc_di_assignment[1]]--;
 702                 ipu_dc_use_count--;
 703                 ipu_dmfc_use_count--;
 704                 break;
 705         case MEM_BG_SYNC:
 706                 ipu_dp_uninit(channel);
 707                 ipu_dc_uninit(5);
 708                 ipu_di_use_count[g_dc_di_assignment[5]]--;
 709                 ipu_dc_use_count--;
 710                 ipu_dp_use_count--;
 711                 ipu_dmfc_use_count--;
 712                 break;
 713         case MEM_FG_SYNC:
 714                 ipu_dp_uninit(channel);
 715                 ipu_dc_use_count--;
 716                 ipu_dp_use_count--;
 717                 ipu_dmfc_use_count--;
 718                 break;
 719         default:
 720                 break;
 721         }
 722
 723         g_channel_init_mask &= ~(1L << IPU_CHAN_ID(channel));
 724
 725         if (ipu_dc_use_count == 0)
 726                 ipu_conf &= ~IPU_CONF_DC_EN;
 727         if (ipu_dp_use_count == 0)
 728                 ipu_conf &= ~IPU_CONF_DP_EN;
 729         if (ipu_dmfc_use_count == 0)
 730                 ipu_conf &= ~IPU_CONF_DMFC_EN;
 731         if (ipu_di_use_count[0] == 0) {
 732                 ipu_conf &= ~IPU_CONF_DI0_EN;
 733         }
 734         if (ipu_di_use_count[1] == 0) {
 735                 ipu_conf &= ~IPU_CONF_DI1_EN;
 736         }
 737
 738         __raw_writel(ipu_conf, IPU_CONF);
 739
 740         if (ipu_conf == 0) {
 741                 clk_disable(g_ipu_clk);
 742                 g_ipu_clk_enabled = 0;
 743         }
 744
 745 }
 746
 747 static inline void ipu_ch_param_dump(int ch)
 748 {
 749 #ifdef DEBUG
 750         struct ipu_ch_param *p = ipu_ch_param_addr(ch);
 751         debug("ch %d word 0 - %08X %08X %08X %08X %08X\n", ch,
 752                  p->word[0].data[0], p->word[0].data[1], p->word[0].data[2],
 753                  p->word[0].data[3], p->word[0].data[4]);
 754         debug("ch %d word 1 - %08X %08X %08X %08X %08X\n", ch,
 755                  p->word[1].data[0], p->word[1].data[1], p->word[1].data[2],
 756                  p->word[1].data[3], p->word[1].data[4]);
 757         debug("PFS 0x%x, ",
 758                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 85, 4));
 759         debug("BPP 0x%x, ",
 760                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 107, 3));
 761         debug("NPB 0x%x\n",
 762                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 78, 7));
 763
 764         debug("FW %d, ",
 765                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 125, 13));
 766         debug("FH %d, ",
 767                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 0, 138, 12));
 768         debug("Stride %d\n",
 769                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 102, 14));
 770
 771         debug("Width0 %d+1, ",
 772                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 116, 3));
 773         debug("Width1 %d+1, ",
 774                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 119, 3));
 775         debug("Width2 %d+1, ",
 776                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 122, 3));
 777         debug("Width3 %d+1, ",
 778                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 125, 3));
 779         debug("Offset0 %d, ",
 780                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 128, 5));
 781         debug("Offset1 %d, ",
 782                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 133, 5));
 783         debug("Offset2 %d, ",
 784                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 138, 5));
 785         debug("Offset3 %d\n",
 786                  ipu_ch_param_read_field(ipu_ch_param_addr(ch), 1, 143, 5));
 787 #endif
 788 }
 789
 790 static inline void ipu_ch_params_set_packing(struct ipu_ch_param *p,
 791                                               int red_width, int red_offset,
 792                                               int green_width, int green_offset,
 793                                               int blue_width, int blue_offset,
 794                                               int alpha_width, int alpha_offset)
 795 {
 796         /* Setup red width and offset */
 797         ipu_ch_param_set_field(p, 1, 116, 3, red_width - 1);
 798         ipu_ch_param_set_field(p, 1, 128, 5, red_offset);
 799         /* Setup green width and offset */
 800         ipu_ch_param_set_field(p, 1, 119, 3, green_width - 1);
 801         ipu_ch_param_set_field(p, 1, 133, 5, green_offset);
 802         /* Setup blue width and offset */
 803         ipu_ch_param_set_field(p, 1, 122, 3, blue_width - 1);
 804         ipu_ch_param_set_field(p, 1, 138, 5, blue_offset);
 805         /* Setup alpha width and offset */
 806         ipu_ch_param_set_field(p, 1, 125, 3, alpha_width - 1);
 807         ipu_ch_param_set_field(p, 1, 143, 5, alpha_offset);
 808 }
 809
 810 static void ipu_ch_param_init(int ch,
 811                               uint32_t pixel_fmt, uint32_t width,
 812                               uint32_t height, uint32_t stride,
 813                               uint32_t u, uint32_t v,
 814                               uint32_t uv_stride, dma_addr_t addr0,
 815                               dma_addr_t addr1)
 816 {
 817         uint32_t u_offset = 0;
 818         uint32_t v_offset = 0;
 819         struct ipu_ch_param params;
 820
 821         memset(&params, 0, sizeof(params));
 822
 823         ipu_ch_param_set_field(&params, 0, 125, 13, width - 1);
 824
 825         if ((ch == 8) || (ch == 9) || (ch == 10)) {
 826                 ipu_ch_param_set_field(&params, 0, 138, 12, (height / 2) - 1);
 827                 ipu_ch_param_set_field(&params, 1, 102, 14, (stride * 2) - 1);
 828         } else {
 829                 ipu_ch_param_set_field(&params, 0, 138, 12, height - 1);
 830                 ipu_ch_param_set_field(&params, 1, 102, 14, stride - 1);
 831         }
 832
 833         ipu_ch_param_set_field(&params, 1, 0, 29, addr0 >> 3);
 834         ipu_ch_param_set_field(&params, 1, 29, 29, addr1 >> 3);
 835
 836         switch (pixel_fmt) {
 837         case IPU_PIX_FMT_GENERIC:
 838                 /*Represents 8-bit Generic data */
 839                 ipu_ch_param_set_field(&params, 0, 107, 3, 5);  /* bits/pixel */
 840                 ipu_ch_param_set_field(&params, 1, 85, 4, 6);   /* pix format */
 841                 ipu_ch_param_set_field(&params, 1, 78, 7, 63);  /* burst size */
 842
 843                 break;
 844         case IPU_PIX_FMT_GENERIC_32:
 845                 /*Represents 32-bit Generic data */
 846                 break;
 847         case IPU_PIX_FMT_RGB565:
 848                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 849                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 850                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 851
 852                 ipu_ch_params_set_packing(&params, 5, 0, 6, 5, 5, 11, 8, 16);
 853                 break;
 854         case IPU_PIX_FMT_BGR24:
 855                 ipu_ch_param_set_field(&params, 0, 107, 3, 1);  /* bits/pixel */
 856                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 857                 ipu_ch_param_set_field(&params, 1, 78, 7, 19);  /* burst size */
 858
 859                 ipu_ch_params_set_packing(&params, 8, 0, 8, 8, 8, 16, 8, 24);
 860                 break;
 861         case IPU_PIX_FMT_RGB24:
 862         case IPU_PIX_FMT_YUV444:
 863                 ipu_ch_param_set_field(&params, 0, 107, 3, 1);  /* bits/pixel */
 864                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 865                 ipu_ch_param_set_field(&params, 1, 78, 7, 19);  /* burst size */
 866
 867                 ipu_ch_params_set_packing(&params, 8, 16, 8, 8, 8, 0, 8, 24);
 868                 break;
 869         case IPU_PIX_FMT_BGRA32:
 870         case IPU_PIX_FMT_BGR32:
 871                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 872                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 873                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 874
 875                 ipu_ch_params_set_packing(&params, 8, 8, 8, 16, 8, 24, 8, 0);
 876                 break;
 877         case IPU_PIX_FMT_RGBA32:
 878         case IPU_PIX_FMT_RGB32:
 879                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 880                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 881                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 882
 883                 ipu_ch_params_set_packing(&params, 8, 24, 8, 16, 8, 8, 8, 0);
 884                 break;
 885         case IPU_PIX_FMT_ABGR32:
 886                 ipu_ch_param_set_field(&params, 0, 107, 3, 0);  /* bits/pixel */
 887                 ipu_ch_param_set_field(&params, 1, 85, 4, 7);   /* pix format */
 888
 889                 ipu_ch_params_set_packing(&params, 8, 0, 8, 8, 8, 16, 8, 24);
 890                 break;
 891         case IPU_PIX_FMT_UYVY:
 892                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 893                 ipu_ch_param_set_field(&params, 1, 85, 4, 0xA); /* pix format */
 894                 ipu_ch_param_set_field(&params, 1, 78, 7, 15);  /* burst size */
 895                 break;
 896         case IPU_PIX_FMT_YUYV:
 897                 ipu_ch_param_set_field(&params, 0, 107, 3, 3);  /* bits/pixel */
 898                 ipu_ch_param_set_field(&params, 1, 85, 4, 0x8); /* pix format */
 899                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 900                 break;
 901         case IPU_PIX_FMT_YUV420P2:
 902         case IPU_PIX_FMT_YUV420P:
 903                 ipu_ch_param_set_field(&params, 1, 85, 4, 2);   /* pix format */
 904
 905                 if (uv_stride < stride / 2)
 906                         uv_stride = stride / 2;
 907
 908                 u_offset = stride * height;
 909                 v_offset = u_offset + (uv_stride * height / 2);
 910                 /* burst size */
 911                 if ((ch == 8) || (ch == 9) || (ch == 10)) {
 912                         ipu_ch_param_set_field(&params, 1, 78, 7, 15);
 913                         uv_stride = uv_stride*2;
 914                 } else {
 915                         ipu_ch_param_set_field(&params, 1, 78, 7, 31);
 916                 }
 917                 break;
 918         case IPU_PIX_FMT_YVU422P:
 919                 /* BPP & pixel format */
 920                 ipu_ch_param_set_field(&params, 1, 85, 4, 1);   /* pix format */
 921                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 922
 923                 if (uv_stride < stride / 2)
 924                         uv_stride = stride / 2;
 925
 926                 v_offset = (v == 0) ? stride * height : v;
 927                 u_offset = (u == 0) ? v_offset + v_offset / 2 : u;
 928                 break;
 929         case IPU_PIX_FMT_YUV422P:
 930                 /* BPP & pixel format */
 931                 ipu_ch_param_set_field(&params, 1, 85, 4, 1);   /* pix format */
 932                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 933
 934                 if (uv_stride < stride / 2)
 935                         uv_stride = stride / 2;
 936
 937                 u_offset = (u == 0) ? stride * height : u;
 938                 v_offset = (v == 0) ? u_offset + u_offset / 2 : v;
 939                 break;
 940         case IPU_PIX_FMT_NV12:
 941                 /* BPP & pixel format */
 942                 ipu_ch_param_set_field(&params, 1, 85, 4, 4);   /* pix format */
 943                 ipu_ch_param_set_field(&params, 1, 78, 7, 31);  /* burst size */
 944                 uv_stride = stride;
 945                 u_offset = (u == 0) ? stride * height : u;
 946                 break;
 947         default:
 948                 puts("mxc ipu: unimplemented pixel format\n");
 949                 break;
 950         }
 951
 952
 953         if (uv_stride)
 954                 ipu_ch_param_set_field(&params, 1, 128, 14, uv_stride - 1);
 955
 956         /* Get the uv offset from user when need cropping */
 957         if (u || v) {
 958                 u_offset = u;
 959                 v_offset = v;
 960         }
 961
 962         /* UBO and VBO are 22-bit */
 963         if (u_offset/8 > 0x3fffff)
 964                 puts("The value of U offset exceeds IPU limitation\n");
 965         if (v_offset/8 > 0x3fffff)
 966                 puts("The value of V offset exceeds IPU limitation\n");
 967
 968         ipu_ch_param_set_field(&params, 0, 46, 22, u_offset / 8);
 969         ipu_ch_param_set_field(&params, 0, 68, 22, v_offset / 8);
 970
 971         debug("initializing idma ch %d @ %p\n", ch, ipu_ch_param_addr(ch));
 972         memcpy(ipu_ch_param_addr(ch), &params, sizeof(params));
 973 };
 974
 975 /*
 976  * This function is called to initialize a buffer for logical IPU channel.
 977  *
 978  * @param       channel         Input parameter for the logical channel ID.
 979  *
 980  * @param       type            Input parameter which buffer to initialize.
 981  *
 982  * @param       pixel_fmt       Input parameter for pixel format of buffer.
 983  *                              Pixel format is a FOURCC ASCII code.
 984  *
 985  * @param       width           Input parameter for width of buffer in pixels.
 986  *
 987  * @param       height          Input parameter for height of buffer in pixels.
 988  *
 989  * @param       stride          Input parameter for stride length of buffer
 990  *                              in pixels.
 991  *
 992  * @param       phyaddr_0       Input parameter buffer 0 physical address.
 993  *
 994  * @param       phyaddr_1       Input parameter buffer 1 physical address.
 995  *                              Setting this to a value other than NULL enables
 996  *                              double buffering mode.
 997  *
 998  * @param       u               private u offset for additional cropping,
 999  *                              zero if not used.
1000  *
1001  * @param       v               private v offset for additional cropping,
1002  *                              zero if not used.
1003  *
1004  * @return      Returns 0 on success or negative error code on fail
1005  */
1006 int32_t ipu_init_channel_buffer(ipu_channel_t channel, ipu_buffer_t type,
1007                                 uint32_t pixel_fmt,
1008                                 uint16_t width, uint16_t height,
1009                                 uint32_t stride,
1010                                 dma_addr_t phyaddr_0, dma_addr_t phyaddr_1,
1011                                 uint32_t u, uint32_t v)
1012 {
1013         uint32_t reg;
1014         uint32_t dma_chan;
1015
1016         dma_chan = channel_2_dma(channel, type);
1017         if (!idma_is_valid(dma_chan))
1018                 return -EINVAL;
1019
1020         if (stride < width * bytes_per_pixel(pixel_fmt))
1021                 stride = width * bytes_per_pixel(pixel_fmt);
1022
1023         if (stride % 4) {
1024                 printf(
1025                         "Stride not 32-bit aligned, stride = %d\n", stride);
1026                 return -EINVAL;
1027         }
1028         /* Build parameter memory data for DMA channel */
1029         ipu_ch_param_init(dma_chan, pixel_fmt, width, height, stride, u, v, 0,
1030                            phyaddr_0, phyaddr_1);
1031
1032         if (ipu_is_dmfc_chan(dma_chan)) {
1033                 ipu_dmfc_set_wait4eot(dma_chan, width);
1034         }
1035
1036         if (idma_is_set(IDMAC_CHA_PRI, dma_chan))
1037                 ipu_ch_param_set_high_priority(dma_chan);
1038
1039         ipu_ch_param_dump(dma_chan);
1040
1041         reg = __raw_readl(IPU_CHA_DB_MODE_SEL(dma_chan));
1042         if (phyaddr_1)
1043                 reg |= idma_mask(dma_chan);
1044         else
1045                 reg &= ~idma_mask(dma_chan);
1046         __raw_writel(reg, IPU_CHA_DB_MODE_SEL(dma_chan));
1047
1048         /* Reset to buffer 0 */
1049         __raw_writel(idma_mask(dma_chan), IPU_CHA_CUR_BUF(dma_chan));
1050
1051         return 0;
1052 }
1053
1054 /*
1055  * This function enables a logical channel.
1056  *
1057  * @param       channel         Input parameter for the logical channel ID.
1058  *
1059  * @return      This function returns 0 on success or negative error code on
1060  *              fail.
1061  */
1062 int32_t ipu_enable_channel(ipu_channel_t channel)
1063 {
1064         uint32_t reg;
1065         uint32_t in_dma;
1066         uint32_t out_dma;
1067
1068         if (g_channel_enable_mask & (1L << IPU_CHAN_ID(channel))) {
1069                 printf("Warning: channel already enabled %d\n",
1070                         IPU_CHAN_ID(channel));
1071         }
1072
1073         /* Get input and output dma channels */
1074         out_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
1075         in_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
1076
1077         if (idma_is_valid(in_dma)) {
1078                 reg = __raw_readl(IDMAC_CHA_EN(in_dma));
1079                 __raw_writel(reg | idma_mask(in_dma), IDMAC_CHA_EN(in_dma));
1080         }
1081         if (idma_is_valid(out_dma)) {
1082                 reg = __raw_readl(IDMAC_CHA_EN(out_dma));
1083                 __raw_writel(reg | idma_mask(out_dma), IDMAC_CHA_EN(out_dma));
1084         }
1085
1086         if ((channel == MEM_DC_SYNC) || (channel == MEM_BG_SYNC) ||
1087             (channel == MEM_FG_SYNC))
1088                 ipu_dp_dc_enable(channel);
1089
1090         g_channel_enable_mask |= 1L << IPU_CHAN_ID(channel);
1091
1092         return 0;
1093 }
1094
1095 /*
1096  * This function clear buffer ready for a logical channel.
1097  *
1098  * @param       channel         Input parameter for the logical channel ID.
1099  *
1100  * @param       type            Input parameter which buffer to clear.
1101  *
1102  * @param       bufNum          Input parameter for which buffer number clear
1103  *                              ready state.
1104  *
1105  */
1106 void ipu_clear_buffer_ready(ipu_channel_t channel, ipu_buffer_t type,
1107                 uint32_t bufNum)
1108 {
1109         uint32_t dma_ch = channel_2_dma(channel, type);
1110
1111         if (!idma_is_valid(dma_ch))
1112                 return;
1113
1114         __raw_writel(0xF0000000, IPU_GPR); /* write one to clear */
1115         if (bufNum == 0) {
1116                 if (idma_is_set(IPU_CHA_BUF0_RDY, dma_ch)) {
1117                         __raw_writel(idma_mask(dma_ch),
1118                                         IPU_CHA_BUF0_RDY(dma_ch));
1119                 }
1120         } else {
1121                 if (idma_is_set(IPU_CHA_BUF1_RDY, dma_ch)) {
1122                         __raw_writel(idma_mask(dma_ch),
1123                                         IPU_CHA_BUF1_RDY(dma_ch));
1124                 }
1125         }
1126         __raw_writel(0x0, IPU_GPR); /* write one to set */
1127 }
1128
1129 /*
1130  * This function disables a logical channel.
1131  *
1132  * @param       channel         Input parameter for the logical channel ID.
1133  *
1134  * @param       wait_for_stop   Flag to set whether to wait for channel end
1135  *                              of frame or return immediately.
1136  *
1137  * @return      This function returns 0 on success or negative error code on
1138  *              fail.
1139  */
1140 int32_t ipu_disable_channel(ipu_channel_t channel)
1141 {
1142         uint32_t reg;
1143         uint32_t in_dma;
1144         uint32_t out_dma;
1145
1146         if ((g_channel_enable_mask & (1L << IPU_CHAN_ID(channel))) == 0) {
1147                 debug("Channel already disabled %d\n",
1148                         IPU_CHAN_ID(channel));
1149                 return 0;
1150         }
1151
1152         /* Get input and output dma channels */
1153         out_dma = channel_2_dma(channel, IPU_OUTPUT_BUFFER);
1154         in_dma = channel_2_dma(channel, IPU_VIDEO_IN_BUFFER);
1155
1156         if ((idma_is_valid(in_dma) &&
1157                 !idma_is_set(IDMAC_CHA_EN, in_dma))
1158                 && (idma_is_valid(out_dma) &&
1159                 !idma_is_set(IDMAC_CHA_EN, out_dma)))
1160                 return -EINVAL;
1161
1162         if ((channel == MEM_BG_SYNC) || (channel == MEM_FG_SYNC) ||
1163             (channel == MEM_DC_SYNC)) {
1164                 ipu_dp_dc_disable(channel, 0);
1165         }
1166
1167         /* Disable DMA channel(s) */
1168         if (idma_is_valid(in_dma)) {
1169                 reg = __raw_readl(IDMAC_CHA_EN(in_dma));
1170                 __raw_writel(reg & ~idma_mask(in_dma), IDMAC_CHA_EN(in_dma));
1171                 __raw_writel(idma_mask(in_dma), IPU_CHA_CUR_BUF(in_dma));
1172         }
1173         if (idma_is_valid(out_dma)) {
1174                 reg = __raw_readl(IDMAC_CHA_EN(out_dma));
1175                 __raw_writel(reg & ~idma_mask(out_dma), IDMAC_CHA_EN(out_dma));
1176                 __raw_writel(idma_mask(out_dma), IPU_CHA_CUR_BUF(out_dma));
1177         }
1178
1179         g_channel_enable_mask &= ~(1L << IPU_CHAN_ID(channel));
1180
1181         /* Set channel buffers NOT to be ready */
1182         if (idma_is_valid(in_dma)) {
1183                 ipu_clear_buffer_ready(channel, IPU_VIDEO_IN_BUFFER, 0);
1184                 ipu_clear_buffer_ready(channel, IPU_VIDEO_IN_BUFFER, 1);
1185         }
1186         if (idma_is_valid(out_dma)) {
1187                 ipu_clear_buffer_ready(channel, IPU_OUTPUT_BUFFER, 0);
1188                 ipu_clear_buffer_ready(channel, IPU_OUTPUT_BUFFER, 1);
1189         }
1190
1191         return 0;
1192 }
1193
1194 uint32_t bytes_per_pixel(uint32_t fmt)
1195 {
1196         switch (fmt) {
1197         case IPU_PIX_FMT_GENERIC:       /*generic data */
1198         case IPU_PIX_FMT_RGB332:
1199         case IPU_PIX_FMT_YUV420P:
1200         case IPU_PIX_FMT_YUV422P:
1201                 return 1;
1202                 break;
1203         case IPU_PIX_FMT_RGB565:
1204         case IPU_PIX_FMT_YUYV:
1205         case IPU_PIX_FMT_UYVY:
1206                 return 2;
1207                 break;
1208         case IPU_PIX_FMT_BGR24:
1209         case IPU_PIX_FMT_RGB24:
1210                 return 3;
1211                 break;
1212         case IPU_PIX_FMT_GENERIC_32:    /*generic data */
1213         case IPU_PIX_FMT_BGR32:
1214         case IPU_PIX_FMT_BGRA32:
1215         case IPU_PIX_FMT_RGB32:
1216         case IPU_PIX_FMT_RGBA32:
1217         case IPU_PIX_FMT_ABGR32:
1218                 return 4;
1219                 break;
1220         default:
1221                 return 1;
1222                 break;
1223         }
1224         return 0;
1225 }
1226
1227 ipu_color_space_t format_to_colorspace(uint32_t fmt)
1228 {
1229         switch (fmt) {
1230         case IPU_PIX_FMT_RGB666:
1231         case IPU_PIX_FMT_RGB565:
1232         case IPU_PIX_FMT_BGR24:
1233         case IPU_PIX_FMT_RGB24:
1234         case IPU_PIX_FMT_BGR32:
1235         case IPU_PIX_FMT_BGRA32:
1236         case IPU_PIX_FMT_RGB32:
1237         case IPU_PIX_FMT_RGBA32:
1238         case IPU_PIX_FMT_ABGR32:
1239         case IPU_PIX_FMT_LVDS666:
1240         case IPU_PIX_FMT_LVDS888:
1241                 return RGB;
1242                 break;
1243
1244         default:
1245                 return YCbCr;
1246                 break;
1247         }
1248         return RGB;
1249 }
1250
1251 /* should be removed when clk framework is availiable */
1252 int ipu_set_ldb_clock(int rate)
1253 {
1254         ldb_clk.rate = rate;
1255
1256         return 0;
1257 }
1258
1259 bool ipu_clk_enabled(void)
1260 {
1261         return g_ipu_clk_enabled;
1262 }