drivers/media/platform/qcom/camss-8x16/camss-ispif.c

   1 /*
   2  * camss-ispif.c
   3  *
   4  * Qualcomm MSM Camera Subsystem - ISPIF (ISP Interface) Module
   5  *
   6  * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
   7  * Copyright (C) 2015-2017 Linaro Ltd.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 and
  11  * only version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18 #include <linux/clk.h>
  19 #include <linux/completion.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/iopoll.h>
  22 #include <linux/kernel.h>
  23 #include <linux/mutex.h>
  24 #include <linux/platform_device.h>
  25 #include <media/media-entity.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-subdev.h>
  28
  29 #include "camss-ispif.h"
  30 #include "camss.h"
  31
  32 #define MSM_ISPIF_NAME "msm_ispif"
  33
  34 #define ispif_line_array(ptr_line)      \
  35         ((const struct ispif_line (*)[]) &(ptr_line[-(ptr_line->id)]))
  36
  37 #define to_ispif(ptr_line)      \
  38         container_of(ispif_line_array(ptr_line), struct ispif_device, ptr_line)
  39
  40 #define ISPIF_RST_CMD_0                 0x008
  41 #define ISPIF_RST_CMD_0_STROBED_RST_EN          (1 << 0)
  42 #define ISPIF_RST_CMD_0_MISC_LOGIC_RST          (1 << 1)
  43 #define ISPIF_RST_CMD_0_SW_REG_RST              (1 << 2)
  44 #define ISPIF_RST_CMD_0_PIX_INTF_0_CSID_RST     (1 << 3)
  45 #define ISPIF_RST_CMD_0_PIX_INTF_0_VFE_RST      (1 << 4)
  46 #define ISPIF_RST_CMD_0_PIX_INTF_1_CSID_RST     (1 << 5)
  47 #define ISPIF_RST_CMD_0_PIX_INTF_1_VFE_RST      (1 << 6)
  48 #define ISPIF_RST_CMD_0_RDI_INTF_0_CSID_RST     (1 << 7)
  49 #define ISPIF_RST_CMD_0_RDI_INTF_0_VFE_RST      (1 << 8)
  50 #define ISPIF_RST_CMD_0_RDI_INTF_1_CSID_RST     (1 << 9)
  51 #define ISPIF_RST_CMD_0_RDI_INTF_1_VFE_RST      (1 << 10)
  52 #define ISPIF_RST_CMD_0_RDI_INTF_2_CSID_RST     (1 << 11)
  53 #define ISPIF_RST_CMD_0_RDI_INTF_2_VFE_RST      (1 << 12)
  54 #define ISPIF_RST_CMD_0_PIX_OUTPUT_0_MISR_RST   (1 << 16)
  55 #define ISPIF_RST_CMD_0_RDI_OUTPUT_0_MISR_RST   (1 << 17)
  56 #define ISPIF_RST_CMD_0_RDI_OUTPUT_1_MISR_RST   (1 << 18)
  57 #define ISPIF_RST_CMD_0_RDI_OUTPUT_2_MISR_RST   (1 << 19)
  58 #define ISPIF_IRQ_GLOBAL_CLEAR_CMD      0x01c
  59 #define ISPIF_VFE_m_CTRL_0(m)           (0x200 + 0x200 * (m))
  60 #define ISPIF_VFE_m_CTRL_0_PIX0_LINE_BUF_EN     (1 << 6)
  61 #define ISPIF_VFE_m_IRQ_MASK_0(m)       (0x208 + 0x200 * (m))
  62 #define ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE      0x00001249
  63 #define ISPIF_VFE_m_IRQ_MASK_0_PIX0_MASK        0x00001fff
  64 #define ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE      0x02492000
  65 #define ISPIF_VFE_m_IRQ_MASK_0_RDI0_MASK        0x03ffe000
  66 #define ISPIF_VFE_m_IRQ_MASK_1(m)       (0x20c + 0x200 * (m))
  67 #define ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE      0x00001249
  68 #define ISPIF_VFE_m_IRQ_MASK_1_PIX1_MASK        0x00001fff
  69 #define ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE      0x02492000
  70 #define ISPIF_VFE_m_IRQ_MASK_1_RDI1_MASK        0x03ffe000
  71 #define ISPIF_VFE_m_IRQ_MASK_2(m)       (0x210 + 0x200 * (m))
  72 #define ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE      0x00001249
  73 #define ISPIF_VFE_m_IRQ_MASK_2_RDI2_MASK        0x00001fff
  74 #define ISPIF_VFE_m_IRQ_STATUS_0(m)     (0x21c + 0x200 * (m))
  75 #define ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW  (1 << 12)
  76 #define ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW  (1 << 25)
  77 #define ISPIF_VFE_m_IRQ_STATUS_1(m)     (0x220 + 0x200 * (m))
  78 #define ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW  (1 << 12)
  79 #define ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW  (1 << 25)
  80 #define ISPIF_VFE_m_IRQ_STATUS_2(m)     (0x224 + 0x200 * (m))
  81 #define ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW  (1 << 12)
  82 #define ISPIF_VFE_m_IRQ_CLEAR_0(m)      (0x230 + 0x200 * (m))
  83 #define ISPIF_VFE_m_IRQ_CLEAR_1(m)      (0x234 + 0x200 * (m))
  84 #define ISPIF_VFE_m_IRQ_CLEAR_2(m)      (0x238 + 0x200 * (m))
  85 #define ISPIF_VFE_m_INTF_INPUT_SEL(m)   (0x244 + 0x200 * (m))
  86 #define ISPIF_VFE_m_INTF_CMD_0(m)       (0x248 + 0x200 * (m))
  87 #define ISPIF_VFE_m_INTF_CMD_1(m)       (0x24c + 0x200 * (m))
  88 #define ISPIF_VFE_m_PIX_INTF_n_CID_MASK(m, n)   \
  89                                         (0x254 + 0x200 * (m) + 0x4 * (n))
  90 #define ISPIF_VFE_m_RDI_INTF_n_CID_MASK(m, n)   \
  91                                         (0x264 + 0x200 * (m) + 0x4 * (n))
  92 #define ISPIF_VFE_m_PIX_INTF_n_STATUS(m, n)     \
  93                                         (0x2c0 + 0x200 * (m) + 0x4 * (n))
  94 #define ISPIF_VFE_m_RDI_INTF_n_STATUS(m, n)     \
  95                                         (0x2d0 + 0x200 * (m) + 0x4 * (n))
  96
  97 #define CSI_PIX_CLK_MUX_SEL             0x000
  98 #define CSI_RDI_CLK_MUX_SEL             0x008
  99
 100 #define ISPIF_TIMEOUT_SLEEP_US          1000
 101 #define ISPIF_TIMEOUT_ALL_US            1000000
 102 #define ISPIF_RESET_TIMEOUT_MS          500
 103
 104 enum ispif_intf_cmd {
 105         CMD_DISABLE_FRAME_BOUNDARY = 0x0,
 106         CMD_ENABLE_FRAME_BOUNDARY = 0x1,
 107         CMD_DISABLE_IMMEDIATELY = 0x2,
 108         CMD_ALL_DISABLE_IMMEDIATELY = 0xaaaaaaaa,
 109         CMD_ALL_NO_CHANGE = 0xffffffff,
 110 };
 111
 112 static const u32 ispif_formats[] = {
 113         MEDIA_BUS_FMT_UYVY8_2X8,
 114         MEDIA_BUS_FMT_VYUY8_2X8,
 115         MEDIA_BUS_FMT_YUYV8_2X8,
 116         MEDIA_BUS_FMT_YVYU8_2X8,
 117         MEDIA_BUS_FMT_SBGGR8_1X8,
 118         MEDIA_BUS_FMT_SGBRG8_1X8,
 119         MEDIA_BUS_FMT_SGRBG8_1X8,
 120         MEDIA_BUS_FMT_SRGGB8_1X8,
 121         MEDIA_BUS_FMT_SBGGR10_1X10,
 122         MEDIA_BUS_FMT_SGBRG10_1X10,
 123         MEDIA_BUS_FMT_SGRBG10_1X10,
 124         MEDIA_BUS_FMT_SRGGB10_1X10,
 125         MEDIA_BUS_FMT_SBGGR12_1X12,
 126         MEDIA_BUS_FMT_SGBRG12_1X12,
 127         MEDIA_BUS_FMT_SGRBG12_1X12,
 128         MEDIA_BUS_FMT_SRGGB12_1X12,
 129 };
 130
 131 /*
 132  * ispif_isr - ISPIF module interrupt handler
 133  * @irq: Interrupt line
 134  * @dev: ISPIF device
 135  *
 136  * Return IRQ_HANDLED on success
 137  */
 138 static irqreturn_t ispif_isr(int irq, void *dev)
 139 {
 140         struct ispif_device *ispif = dev;
 141         u32 value0, value1, value2;
 142
 143         value0 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_0(0));
 144         value1 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_1(0));
 145         value2 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_2(0));
 146
 147         writel_relaxed(value0, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(0));
 148         writel_relaxed(value1, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(0));
 149         writel_relaxed(value2, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(0));
 150
 151         writel(0x1, ispif->base + ISPIF_IRQ_GLOBAL_CLEAR_CMD);
 152
 153         if ((value0 >> 27) & 0x1)
 154                 complete(&ispif->reset_complete);
 155
 156         if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW))
 157                 dev_err_ratelimited(to_device(ispif), "VFE0 pix0 overflow\n");
 158
 159         if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW))
 160                 dev_err_ratelimited(to_device(ispif), "VFE0 rdi0 overflow\n");
 161
 162         if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW))
 163                 dev_err_ratelimited(to_device(ispif), "VFE0 pix1 overflow\n");
 164
 165         if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW))
 166                 dev_err_ratelimited(to_device(ispif), "VFE0 rdi1 overflow\n");
 167
 168         if (unlikely(value2 & ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW))
 169                 dev_err_ratelimited(to_device(ispif), "VFE0 rdi2 overflow\n");
 170
 171         return IRQ_HANDLED;
 172 }
 173
 174 /*
 175  * ispif_reset - Trigger reset on ISPIF module and wait to complete
 176  * @ispif: ISPIF device
 177  *
 178  * Return 0 on success or a negative error code otherwise
 179  */
 180 static int ispif_reset(struct ispif_device *ispif)
 181 {
 182         unsigned long time;
 183         u32 val;
 184         int ret;
 185
 186         ret = camss_enable_clocks(ispif->nclocks_for_reset,
 187                                   ispif->clock_for_reset,
 188                                   to_device(ispif));
 189         if (ret < 0)
 190                 return ret;
 191
 192         reinit_completion(&ispif->reset_complete);
 193
 194         val = ISPIF_RST_CMD_0_STROBED_RST_EN |
 195                 ISPIF_RST_CMD_0_MISC_LOGIC_RST |
 196                 ISPIF_RST_CMD_0_SW_REG_RST |
 197                 ISPIF_RST_CMD_0_PIX_INTF_0_CSID_RST |
 198                 ISPIF_RST_CMD_0_PIX_INTF_0_VFE_RST |
 199                 ISPIF_RST_CMD_0_PIX_INTF_1_CSID_RST |
 200                 ISPIF_RST_CMD_0_PIX_INTF_1_VFE_RST |
 201                 ISPIF_RST_CMD_0_RDI_INTF_0_CSID_RST |
 202                 ISPIF_RST_CMD_0_RDI_INTF_0_VFE_RST |
 203                 ISPIF_RST_CMD_0_RDI_INTF_1_CSID_RST |
 204                 ISPIF_RST_CMD_0_RDI_INTF_1_VFE_RST |
 205                 ISPIF_RST_CMD_0_RDI_INTF_2_CSID_RST |
 206                 ISPIF_RST_CMD_0_RDI_INTF_2_VFE_RST |
 207                 ISPIF_RST_CMD_0_PIX_OUTPUT_0_MISR_RST |
 208                 ISPIF_RST_CMD_0_RDI_OUTPUT_0_MISR_RST |
 209                 ISPIF_RST_CMD_0_RDI_OUTPUT_1_MISR_RST |
 210                 ISPIF_RST_CMD_0_RDI_OUTPUT_2_MISR_RST;
 211
 212         writel_relaxed(val, ispif->base + ISPIF_RST_CMD_0);
 213
 214         time = wait_for_completion_timeout(&ispif->reset_complete,
 215                 msecs_to_jiffies(ISPIF_RESET_TIMEOUT_MS));
 216         if (!time) {
 217                 dev_err(to_device(ispif), "ISPIF reset timeout\n");
 218                 return -EIO;
 219         }
 220
 221         camss_disable_clocks(ispif->nclocks_for_reset, ispif->clock_for_reset);
 222
 223         return 0;
 224 }
 225
 226 /*
 227  * ispif_set_power - Power on/off ISPIF module
 228  * @sd: ISPIF V4L2 subdevice
 229  * @on: Requested power state
 230  *
 231  * Return 0 on success or a negative error code otherwise
 232  */
 233 static int ispif_set_power(struct v4l2_subdev *sd, int on)
 234 {
 235         struct ispif_line *line = v4l2_get_subdevdata(sd);
 236         struct ispif_device *ispif = to_ispif(line);
 237         struct device *dev = to_device(ispif);
 238         int ret = 0;
 239
 240         mutex_lock(&ispif->power_lock);
 241
 242         if (on) {
 243                 if (ispif->power_count) {
 244                         /* Power is already on */
 245                         ispif->power_count++;
 246                         goto exit;
 247                 }
 248
 249                 ret = camss_enable_clocks(ispif->nclocks, ispif->clock, dev);
 250                 if (ret < 0)
 251                         goto exit;
 252
 253                 ret = ispif_reset(ispif);
 254                 if (ret < 0) {
 255                         camss_disable_clocks(ispif->nclocks, ispif->clock);
 256                         goto exit;
 257                 }
 258
 259                 ispif->intf_cmd[line->vfe_id].cmd_0 = CMD_ALL_NO_CHANGE;
 260                 ispif->intf_cmd[line->vfe_id].cmd_1 = CMD_ALL_NO_CHANGE;
 261
 262                 ispif->power_count++;
 263         } else {
 264                 if (ispif->power_count == 0) {
 265                         dev_err(dev, "ispif power off on power_count == 0\n");
 266                         goto exit;
 267                 } else if (ispif->power_count == 1) {
 268                         camss_disable_clocks(ispif->nclocks, ispif->clock);
 269                 }
 270
 271                 ispif->power_count--;
 272         }
 273
 274 exit:
 275         mutex_unlock(&ispif->power_lock);
 276
 277         return ret;
 278 }
 279
 280 /*
 281  * ispif_select_clk_mux - Select clock for PIX/RDI interface
 282  * @ispif: ISPIF device
 283  * @intf: VFE interface
 284  * @csid: CSID HW module id
 285  * @vfe: VFE HW module id
 286  * @enable: enable or disable the selected clock
 287  */
 288 static void ispif_select_clk_mux(struct ispif_device *ispif,
 289                                  enum ispif_intf intf, u8 csid,
 290                                  u8 vfe, u8 enable)
 291 {
 292         u32 val;
 293
 294         switch (intf) {
 295         case PIX0:
 296                 val = readl_relaxed(ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
 297                 val &= ~(0xf << (vfe * 8));
 298                 if (enable)
 299                         val |= (csid << (vfe * 8));
 300                 writel_relaxed(val, ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
 301                 break;
 302
 303         case RDI0:
 304                 val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
 305                 val &= ~(0xf << (vfe * 12));
 306                 if (enable)
 307                         val |= (csid << (vfe * 12));
 308                 writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
 309                 break;
 310
 311         case PIX1:
 312                 val = readl_relaxed(ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
 313                 val &= ~(0xf << (4 + (vfe * 8)));
 314                 if (enable)
 315                         val |= (csid << (4 + (vfe * 8)));
 316                 writel_relaxed(val, ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
 317                 break;
 318
 319         case RDI1:
 320                 val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
 321                 val &= ~(0xf << (4 + (vfe * 12)));
 322                 if (enable)
 323                         val |= (csid << (4 + (vfe * 12)));
 324                 writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
 325                 break;
 326
 327         case RDI2:
 328                 val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
 329                 val &= ~(0xf << (8 + (vfe * 12)));
 330                 if (enable)
 331                         val |= (csid << (8 + (vfe * 12)));
 332                 writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
 333                 break;
 334         }
 335
 336         mb();
 337 }
 338
 339 /*
 340  * ispif_validate_intf_status - Validate current status of PIX/RDI interface
 341  * @ispif: ISPIF device
 342  * @intf: VFE interface
 343  * @vfe: VFE HW module id
 344  *
 345  * Return 0 when interface is idle or -EBUSY otherwise
 346  */
 347 static int ispif_validate_intf_status(struct ispif_device *ispif,
 348                                       enum ispif_intf intf, u8 vfe)
 349 {
 350         int ret = 0;
 351         u32 val = 0;
 352
 353         switch (intf) {
 354         case PIX0:
 355                 val = readl_relaxed(ispif->base +
 356                         ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 0));
 357                 break;
 358         case RDI0:
 359                 val = readl_relaxed(ispif->base +
 360                         ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 0));
 361                 break;
 362         case PIX1:
 363                 val = readl_relaxed(ispif->base +
 364                         ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 1));
 365                 break;
 366         case RDI1:
 367                 val = readl_relaxed(ispif->base +
 368                         ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 1));
 369                 break;
 370         case RDI2:
 371                 val = readl_relaxed(ispif->base +
 372                         ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 2));
 373                 break;
 374         }
 375
 376         if ((val & 0xf) != 0xf) {
 377                 dev_err(to_device(ispif), "%s: ispif is busy: 0x%x\n",
 378                         __func__, val);
 379                 ret = -EBUSY;
 380         }
 381
 382         return ret;
 383 }
 384
 385 /*
 386  * ispif_wait_for_stop - Wait for PIX/RDI interface to stop
 387  * @ispif: ISPIF device
 388  * @intf: VFE interface
 389  * @vfe: VFE HW module id
 390  *
 391  * Return 0 on success or a negative error code otherwise
 392  */
 393 static int ispif_wait_for_stop(struct ispif_device *ispif,
 394                                enum ispif_intf intf, u8 vfe)
 395 {
 396         u32 addr = 0;
 397         u32 stop_flag = 0;
 398         int ret;
 399
 400         switch (intf) {
 401         case PIX0:
 402                 addr = ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 0);
 403                 break;
 404         case RDI0:
 405                 addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 0);
 406                 break;
 407         case PIX1:
 408                 addr = ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 1);
 409                 break;
 410         case RDI1:
 411                 addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 1);
 412                 break;
 413         case RDI2:
 414                 addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 2);
 415                 break;
 416         }
 417
 418         ret = readl_poll_timeout(ispif->base + addr,
 419                                  stop_flag,
 420                                  (stop_flag & 0xf) == 0xf,
 421                                  ISPIF_TIMEOUT_SLEEP_US,
 422                                  ISPIF_TIMEOUT_ALL_US);
 423         if (ret < 0)
 424                 dev_err(to_device(ispif), "%s: ispif stop timeout\n",
 425                         __func__);
 426
 427         return ret;
 428 }
 429
 430 /*
 431  * ispif_select_csid - Select CSID HW module for input from
 432  * @ispif: ISPIF device
 433  * @intf: VFE interface
 434  * @csid: CSID HW module id
 435  * @vfe: VFE HW module id
 436  * @enable: enable or disable the selected input
 437  */
 438 static void ispif_select_csid(struct ispif_device *ispif, enum ispif_intf intf,
 439                               u8 csid, u8 vfe, u8 enable)
 440 {
 441         u32 val;
 442
 443         val = readl_relaxed(ispif->base + ISPIF_VFE_m_INTF_INPUT_SEL(vfe));
 444         switch (intf) {
 445         case PIX0:
 446                 val &= ~(BIT(1) | BIT(0));
 447                 if (enable)
 448                         val |= csid;
 449                 break;
 450         case RDI0:
 451                 val &= ~(BIT(5) | BIT(4));
 452                 if (enable)
 453                         val |= (csid << 4);
 454                 break;
 455         case PIX1:
 456                 val &= ~(BIT(9) | BIT(8));
 457                 if (enable)
 458                         val |= (csid << 8);
 459                 break;
 460         case RDI1:
 461                 val &= ~(BIT(13) | BIT(12));
 462                 if (enable)
 463                         val |= (csid << 12);
 464                 break;
 465         case RDI2:
 466                 val &= ~(BIT(21) | BIT(20));
 467                 if (enable)
 468                         val |= (csid << 20);
 469                 break;
 470         }
 471
 472         writel(val, ispif->base + ISPIF_VFE_m_INTF_INPUT_SEL(vfe));
 473 }
 474
 475 /*
 476  * ispif_select_cid - Enable/disable desired CID
 477  * @ispif: ISPIF device
 478  * @intf: VFE interface
 479  * @cid: desired CID to enable/disable
 480  * @vfe: VFE HW module id
 481  * @enable: enable or disable the desired CID
 482  */
 483 static void ispif_select_cid(struct ispif_device *ispif, enum ispif_intf intf,
 484                              u8 cid, u8 vfe, u8 enable)
 485 {
 486         u32 cid_mask = 1 << cid;
 487         u32 addr = 0;
 488         u32 val;
 489
 490         switch (intf) {
 491         case PIX0:
 492                 addr = ISPIF_VFE_m_PIX_INTF_n_CID_MASK(vfe, 0);
 493                 break;
 494         case RDI0:
 495                 addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 0);
 496                 break;
 497         case PIX1:
 498                 addr = ISPIF_VFE_m_PIX_INTF_n_CID_MASK(vfe, 1);
 499                 break;
 500         case RDI1:
 501                 addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 1);
 502                 break;
 503         case RDI2:
 504                 addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 2);
 505                 break;
 506         }
 507
 508         val = readl_relaxed(ispif->base + addr);
 509         if (enable)
 510                 val |= cid_mask;
 511         else
 512                 val &= ~cid_mask;
 513
 514         writel(val, ispif->base + addr);
 515 }
 516
 517 /*
 518  * ispif_config_irq - Enable/disable interrupts for PIX/RDI interface
 519  * @ispif: ISPIF device
 520  * @intf: VFE interface
 521  * @vfe: VFE HW module id
 522  * @enable: enable or disable
 523  */
 524 static void ispif_config_irq(struct ispif_device *ispif, enum ispif_intf intf,
 525                              u8 vfe, u8 enable)
 526 {
 527         u32 val;
 528
 529         switch (intf) {
 530         case PIX0:
 531                 val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
 532                 val &= ~ISPIF_VFE_m_IRQ_MASK_0_PIX0_MASK;
 533                 if (enable)
 534                         val |= ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE;
 535                 writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
 536                 writel_relaxed(ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE,
 537                                ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(vfe));
 538                 break;
 539         case RDI0:
 540                 val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
 541                 val &= ~ISPIF_VFE_m_IRQ_MASK_0_RDI0_MASK;
 542                 if (enable)
 543                         val |= ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE;
 544                 writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
 545                 writel_relaxed(ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE,
 546                                ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(vfe));
 547                 break;
 548         case PIX1:
 549                 val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
 550                 val &= ~ISPIF_VFE_m_IRQ_MASK_1_PIX1_MASK;
 551                 if (enable)
 552                         val |= ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE;
 553                 writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
 554                 writel_relaxed(ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE,
 555                                ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(vfe));
 556                 break;
 557         case RDI1:
 558                 val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
 559                 val &= ~ISPIF_VFE_m_IRQ_MASK_1_RDI1_MASK;
 560                 if (enable)
 561                         val |= ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE;
 562                 writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
 563                 writel_relaxed(ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE,
 564                                ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(vfe));
 565                 break;
 566         case RDI2:
 567                 val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_2(vfe));
 568                 val &= ~ISPIF_VFE_m_IRQ_MASK_2_RDI2_MASK;
 569                 if (enable)
 570                         val |= ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE;
 571                 writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_2(vfe));
 572                 writel_relaxed(ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE,
 573                                ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(vfe));
 574                 break;
 575         }
 576
 577         writel(0x1, ispif->base + ISPIF_IRQ_GLOBAL_CLEAR_CMD);
 578 }
 579
 580 /*
 581  * ispif_set_intf_cmd - Set command to enable/disable interface
 582  * @ispif: ISPIF device
 583  * @cmd: interface command
 584  * @intf: VFE interface
 585  * @vfe: VFE HW module id
 586  * @vc: virtual channel
 587  */
 588 static void ispif_set_intf_cmd(struct ispif_device *ispif, u8 cmd,
 589                                enum ispif_intf intf, u8 vfe, u8 vc)
 590 {
 591         u32 *val;
 592
 593         if (intf == RDI2) {
 594                 val = &ispif->intf_cmd[vfe].cmd_1;
 595                 *val &= ~(0x3 << (vc * 2 + 8));
 596                 *val |= (cmd << (vc * 2 + 8));
 597                 wmb();
 598                 writel_relaxed(*val, ispif->base + ISPIF_VFE_m_INTF_CMD_1(vfe));
 599                 wmb();
 600         } else {
 601                 val = &ispif->intf_cmd[vfe].cmd_0;
 602                 *val &= ~(0x3 << (vc * 2 + intf * 8));
 603                 *val |= (cmd << (vc * 2 + intf * 8));
 604                 wmb();
 605                 writel_relaxed(*val, ispif->base + ISPIF_VFE_m_INTF_CMD_0(vfe));
 606                 wmb();
 607         }
 608 }
 609
 610 /*
 611  * ispif_set_stream - Enable/disable streaming on ISPIF module
 612  * @sd: ISPIF V4L2 subdevice
 613  * @enable: Requested streaming state
 614  *
 615  * Main configuration of ISPIF module is also done here.
 616  *
 617  * Return 0 on success or a negative error code otherwise
 618  */
 619 static int ispif_set_stream(struct v4l2_subdev *sd, int enable)
 620 {
 621         struct ispif_line *line = v4l2_get_subdevdata(sd);
 622         struct ispif_device *ispif = to_ispif(line);
 623         enum ispif_intf intf = line->interface;
 624         u8 csid = line->csid_id;
 625         u8 vfe = line->vfe_id;
 626         u8 vc = 0; /* Virtual Channel 0 */
 627         u8 cid = vc * 4; /* id of Virtual Channel and Data Type set */
 628         int ret;
 629
 630         if (enable) {
 631                 if (!media_entity_remote_pad(&line->pads[MSM_ISPIF_PAD_SINK]))
 632                         return -ENOLINK;
 633
 634                 /* Config */
 635
 636                 mutex_lock(&ispif->config_lock);
 637                 ispif_select_clk_mux(ispif, intf, csid, vfe, 1);
 638
 639                 ret = ispif_validate_intf_status(ispif, intf, vfe);
 640                 if (ret < 0) {
 641                         mutex_unlock(&ispif->config_lock);
 642                         return ret;
 643                 }
 644
 645                 ispif_select_csid(ispif, intf, csid, vfe, 1);
 646                 ispif_select_cid(ispif, intf, cid, vfe, 1);
 647                 ispif_config_irq(ispif, intf, vfe, 1);
 648                 ispif_set_intf_cmd(ispif, CMD_ENABLE_FRAME_BOUNDARY,
 649                                    intf, vfe, vc);
 650         } else {
 651                 mutex_lock(&ispif->config_lock);
 652                 ispif_set_intf_cmd(ispif, CMD_DISABLE_FRAME_BOUNDARY,
 653                                    intf, vfe, vc);
 654                 mutex_unlock(&ispif->config_lock);
 655
 656                 ret = ispif_wait_for_stop(ispif, intf, vfe);
 657                 if (ret < 0)
 658                         return ret;
 659
 660                 mutex_lock(&ispif->config_lock);
 661                 ispif_config_irq(ispif, intf, vfe, 0);
 662                 ispif_select_cid(ispif, intf, cid, vfe, 0);
 663                 ispif_select_csid(ispif, intf, csid, vfe, 0);
 664                 ispif_select_clk_mux(ispif, intf, csid, vfe, 0);
 665         }
 666
 667         mutex_unlock(&ispif->config_lock);
 668
 669         return 0;
 670 }
 671
 672 /*
 673  * __ispif_get_format - Get pointer to format structure
 674  * @ispif: ISPIF line
 675  * @cfg: V4L2 subdev pad configuration
 676  * @pad: pad from which format is requested
 677  * @which: TRY or ACTIVE format
 678  *
 679  * Return pointer to TRY or ACTIVE format structure
 680  */
 681 static struct v4l2_mbus_framefmt *
 682 __ispif_get_format(struct ispif_line *line,
 683                    struct v4l2_subdev_pad_config *cfg,
 684                    unsigned int pad,
 685                    enum v4l2_subdev_format_whence which)
 686 {
 687         if (which == V4L2_SUBDEV_FORMAT_TRY)
 688                 return v4l2_subdev_get_try_format(&line->subdev, cfg, pad);
 689
 690         return &line->fmt[pad];
 691 }
 692
 693 /*
 694  * ispif_try_format - Handle try format by pad subdev method
 695  * @ispif: ISPIF line
 696  * @cfg: V4L2 subdev pad configuration
 697  * @pad: pad on which format is requested
 698  * @fmt: pointer to v4l2 format structure
 699  * @which: wanted subdev format
 700  */
 701 static void ispif_try_format(struct ispif_line *line,
 702                              struct v4l2_subdev_pad_config *cfg,
 703                              unsigned int pad,
 704                              struct v4l2_mbus_framefmt *fmt,
 705                              enum v4l2_subdev_format_whence which)
 706 {
 707         unsigned int i;
 708
 709         switch (pad) {
 710         case MSM_ISPIF_PAD_SINK:
 711                 /* Set format on sink pad */
 712
 713                 for (i = 0; i < ARRAY_SIZE(ispif_formats); i++)
 714                         if (fmt->code == ispif_formats[i])
 715                                 break;
 716
 717                 /* If not found, use UYVY as default */
 718                 if (i >= ARRAY_SIZE(ispif_formats))
 719                         fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
 720
 721                 fmt->width = clamp_t(u32, fmt->width, 1, 8191);
 722                 fmt->height = clamp_t(u32, fmt->height, 1, 8191);
 723
 724                 fmt->field = V4L2_FIELD_NONE;
 725                 fmt->colorspace = V4L2_COLORSPACE_SRGB;
 726
 727                 break;
 728
 729         case MSM_ISPIF_PAD_SRC:
 730                 /* Set and return a format same as sink pad */
 731
 732                 *fmt = *__ispif_get_format(line, cfg, MSM_ISPIF_PAD_SINK,
 733                                            which);
 734
 735                 break;
 736         }
 737
 738         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 739 }
 740
 741 /*
 742  * ispif_enum_mbus_code - Handle pixel format enumeration
 743  * @sd: ISPIF V4L2 subdevice
 744  * @cfg: V4L2 subdev pad configuration
 745  * @code: pointer to v4l2_subdev_mbus_code_enum structure
 746  * return -EINVAL or zero on success
 747  */
 748 static int ispif_enum_mbus_code(struct v4l2_subdev *sd,
 749                                 struct v4l2_subdev_pad_config *cfg,
 750                                 struct v4l2_subdev_mbus_code_enum *code)
 751 {
 752         struct ispif_line *line = v4l2_get_subdevdata(sd);
 753         struct v4l2_mbus_framefmt *format;
 754
 755         if (code->pad == MSM_ISPIF_PAD_SINK) {
 756                 if (code->index >= ARRAY_SIZE(ispif_formats))
 757                         return -EINVAL;
 758
 759                 code->code = ispif_formats[code->index];
 760         } else {
 761                 if (code->index > 0)
 762                         return -EINVAL;
 763
 764                 format = __ispif_get_format(line, cfg, MSM_ISPIF_PAD_SINK,
 765                                             code->which);
 766
 767                 code->code = format->code;
 768         }
 769
 770         return 0;
 771 }
 772
 773 /*
 774  * ispif_enum_frame_size - Handle frame size enumeration
 775  * @sd: ISPIF V4L2 subdevice
 776  * @cfg: V4L2 subdev pad configuration
 777  * @fse: pointer to v4l2_subdev_frame_size_enum structure
 778  * return -EINVAL or zero on success
 779  */
 780 static int ispif_enum_frame_size(struct v4l2_subdev *sd,
 781                                  struct v4l2_subdev_pad_config *cfg,
 782                                  struct v4l2_subdev_frame_size_enum *fse)
 783 {
 784         struct ispif_line *line = v4l2_get_subdevdata(sd);
 785         struct v4l2_mbus_framefmt format;
 786
 787         if (fse->index != 0)
 788                 return -EINVAL;
 789
 790         format.code = fse->code;
 791         format.width = 1;
 792         format.height = 1;
 793         ispif_try_format(line, cfg, fse->pad, &format, fse->which);
 794         fse->min_width = format.width;
 795         fse->min_height = format.height;
 796
 797         if (format.code != fse->code)
 798                 return -EINVAL;
 799
 800         format.code = fse->code;
 801         format.width = -1;
 802         format.height = -1;
 803         ispif_try_format(line, cfg, fse->pad, &format, fse->which);
 804         fse->max_width = format.width;
 805         fse->max_height = format.height;
 806
 807         return 0;
 808 }
 809
 810 /*
 811  * ispif_get_format - Handle get format by pads subdev method
 812  * @sd: ISPIF V4L2 subdevice
 813  * @cfg: V4L2 subdev pad configuration
 814  * @fmt: pointer to v4l2 subdev format structure
 815  *
 816  * Return -EINVAL or zero on success
 817  */
 818 static int ispif_get_format(struct v4l2_subdev *sd,
 819                             struct v4l2_subdev_pad_config *cfg,
 820                             struct v4l2_subdev_format *fmt)
 821 {
 822         struct ispif_line *line = v4l2_get_subdevdata(sd);
 823         struct v4l2_mbus_framefmt *format;
 824
 825         format = __ispif_get_format(line, cfg, fmt->pad, fmt->which);
 826         if (format == NULL)
 827                 return -EINVAL;
 828
 829         fmt->format = *format;
 830
 831         return 0;
 832 }
 833
 834 /*
 835  * ispif_set_format - Handle set format by pads subdev method
 836  * @sd: ISPIF V4L2 subdevice
 837  * @cfg: V4L2 subdev pad configuration
 838  * @fmt: pointer to v4l2 subdev format structure
 839  *
 840  * Return -EINVAL or zero on success
 841  */
 842 static int ispif_set_format(struct v4l2_subdev *sd,
 843                             struct v4l2_subdev_pad_config *cfg,
 844                             struct v4l2_subdev_format *fmt)
 845 {
 846         struct ispif_line *line = v4l2_get_subdevdata(sd);
 847         struct v4l2_mbus_framefmt *format;
 848
 849         format = __ispif_get_format(line, cfg, fmt->pad, fmt->which);
 850         if (format == NULL)
 851                 return -EINVAL;
 852
 853         ispif_try_format(line, cfg, fmt->pad, &fmt->format, fmt->which);
 854         *format = fmt->format;
 855
 856         /* Propagate the format from sink to source */
 857         if (fmt->pad == MSM_ISPIF_PAD_SINK) {
 858                 format = __ispif_get_format(line, cfg, MSM_ISPIF_PAD_SRC,
 859                                             fmt->which);
 860
 861                 *format = fmt->format;
 862                 ispif_try_format(line, cfg, MSM_ISPIF_PAD_SRC, format,
 863                                  fmt->which);
 864         }
 865
 866         return 0;
 867 }
 868
 869 /*
 870  * ispif_init_formats - Initialize formats on all pads
 871  * @sd: ISPIF V4L2 subdevice
 872  * @fh: V4L2 subdev file handle
 873  *
 874  * Initialize all pad formats with default values.
 875  *
 876  * Return 0 on success or a negative error code otherwise
 877  */
 878 static int ispif_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 879 {
 880         struct v4l2_subdev_format format = {
 881                 .pad = MSM_ISPIF_PAD_SINK,
 882                 .which = fh ? V4L2_SUBDEV_FORMAT_TRY :
 883                               V4L2_SUBDEV_FORMAT_ACTIVE,
 884                 .format = {
 885                         .code = MEDIA_BUS_FMT_UYVY8_2X8,
 886                         .width = 1920,
 887                         .height = 1080
 888                 }
 889         };
 890
 891         return ispif_set_format(sd, fh ? fh->pad : NULL, &format);
 892 }
 893
 894 /*
 895  * msm_ispif_subdev_init - Initialize ISPIF device structure and resources
 896  * @ispif: ISPIF device
 897  * @res: ISPIF module resources table
 898  *
 899  * Return 0 on success or a negative error code otherwise
 900  */
 901 int msm_ispif_subdev_init(struct ispif_device *ispif,
 902                           const struct resources_ispif *res)
 903 {
 904         struct device *dev = to_device(ispif);
 905         struct platform_device *pdev = to_platform_device(dev);
 906         struct resource *r;
 907         int i;
 908         int ret;
 909
 910         /* Memory */
 911
 912         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[0]);
 913         ispif->base = devm_ioremap_resource(dev, r);
 914         if (IS_ERR(ispif->base)) {
 915                 dev_err(dev, "could not map memory\n");
 916                 return PTR_ERR(ispif->base);
 917         }
 918
 919         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[1]);
 920         ispif->base_clk_mux = devm_ioremap_resource(dev, r);
 921         if (IS_ERR(ispif->base_clk_mux)) {
 922                 dev_err(dev, "could not map memory\n");
 923                 return PTR_ERR(ispif->base_clk_mux);
 924         }
 925
 926         /* Interrupt */
 927
 928         r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res->interrupt);
 929
 930         if (!r) {
 931                 dev_err(dev, "missing IRQ\n");
 932                 return -EINVAL;
 933         }
 934
 935         ispif->irq = r->start;
 936         snprintf(ispif->irq_name, sizeof(ispif->irq_name), "%s_%s",
 937                  dev_name(dev), MSM_ISPIF_NAME);
 938         ret = devm_request_irq(dev, ispif->irq, ispif_isr,
 939                                IRQF_TRIGGER_RISING, ispif->irq_name, ispif);
 940         if (ret < 0) {
 941                 dev_err(dev, "request_irq failed: %d\n", ret);
 942                 return ret;
 943         }
 944
 945         /* Clocks */
 946
 947         ispif->nclocks = 0;
 948         while (res->clock[ispif->nclocks])
 949                 ispif->nclocks++;
 950
 951         ispif->clock = devm_kzalloc(dev, ispif->nclocks * sizeof(*ispif->clock),
 952                                     GFP_KERNEL);
 953         if (!ispif->clock)
 954                 return -ENOMEM;
 955
 956         for (i = 0; i < ispif->nclocks; i++) {
 957                 struct camss_clock *clock = &ispif->clock[i];
 958
 959                 clock->clk = devm_clk_get(dev, res->clock[i]);
 960                 if (IS_ERR(clock->clk))
 961                         return PTR_ERR(clock->clk);
 962
 963                 clock->freq = NULL;
 964                 clock->nfreqs = 0;
 965         }
 966
 967         ispif->nclocks_for_reset = 0;
 968         while (res->clock_for_reset[ispif->nclocks_for_reset])
 969                 ispif->nclocks_for_reset++;
 970
 971         ispif->clock_for_reset = devm_kzalloc(dev, ispif->nclocks_for_reset *
 972                         sizeof(*ispif->clock_for_reset), GFP_KERNEL);
 973         if (!ispif->clock_for_reset)
 974                 return -ENOMEM;
 975
 976         for (i = 0; i < ispif->nclocks_for_reset; i++) {
 977                 struct camss_clock *clock = &ispif->clock_for_reset[i];
 978
 979                 clock->clk = devm_clk_get(dev, res->clock_for_reset[i]);
 980                 if (IS_ERR(clock->clk))
 981                         return PTR_ERR(clock->clk);
 982
 983                 clock->freq = NULL;
 984                 clock->nfreqs = 0;
 985         }
 986
 987         for (i = 0; i < ARRAY_SIZE(ispif->line); i++)
 988                 ispif->line[i].id = i;
 989
 990         mutex_init(&ispif->power_lock);
 991         ispif->power_count = 0;
 992
 993         mutex_init(&ispif->config_lock);
 994
 995         init_completion(&ispif->reset_complete);
 996
 997         return 0;
 998 }
 999
1000 /*
1001  * ispif_get_intf - Get ISPIF interface to use by VFE line id
1002  * @line_id: VFE line id that the ISPIF line is connected to
1003  *
1004  * Return ISPIF interface to use
1005  */
1006 static enum ispif_intf ispif_get_intf(enum vfe_line_id line_id)
1007 {
1008         switch (line_id) {
1009         case (VFE_LINE_RDI0):
1010                 return RDI0;
1011         case (VFE_LINE_RDI1):
1012                 return RDI1;
1013         case (VFE_LINE_RDI2):
1014                 return RDI2;
1015         case (VFE_LINE_PIX):
1016                 return PIX0;
1017         default:
1018                 return RDI0;
1019         }
1020 }
1021
1022 /*
1023  * ispif_link_setup - Setup ISPIF connections
1024  * @entity: Pointer to media entity structure
1025  * @local: Pointer to local pad
1026  * @remote: Pointer to remote pad
1027  * @flags: Link flags
1028  *
1029  * Return 0 on success
1030  */
1031 static int ispif_link_setup(struct media_entity *entity,
1032                             const struct media_pad *local,
1033                             const struct media_pad *remote, u32 flags)
1034 {
1035         if (flags & MEDIA_LNK_FL_ENABLED) {
1036                 if (media_entity_remote_pad(local))
1037                         return -EBUSY;
1038
1039                 if (local->flags & MEDIA_PAD_FL_SINK) {
1040                         struct v4l2_subdev *sd;
1041                         struct ispif_line *line;
1042
1043                         sd = media_entity_to_v4l2_subdev(entity);
1044                         line = v4l2_get_subdevdata(sd);
1045
1046                         msm_csid_get_csid_id(remote->entity, &line->csid_id);
1047                 } else { /* MEDIA_PAD_FL_SOURCE */
1048                         struct v4l2_subdev *sd;
1049                         struct ispif_line *line;
1050                         enum vfe_line_id id;
1051
1052                         sd = media_entity_to_v4l2_subdev(entity);
1053                         line = v4l2_get_subdevdata(sd);
1054
1055                         msm_vfe_get_vfe_id(remote->entity, &line->vfe_id);
1056                         msm_vfe_get_vfe_line_id(remote->entity, &id);
1057                         line->interface = ispif_get_intf(id);
1058                 }
1059         }
1060
1061         return 0;
1062 }
1063
1064 static const struct v4l2_subdev_core_ops ispif_core_ops = {
1065         .s_power = ispif_set_power,
1066 };
1067
1068 static const struct v4l2_subdev_video_ops ispif_video_ops = {
1069         .s_stream = ispif_set_stream,
1070 };
1071
1072 static const struct v4l2_subdev_pad_ops ispif_pad_ops = {
1073         .enum_mbus_code = ispif_enum_mbus_code,
1074         .enum_frame_size = ispif_enum_frame_size,
1075         .get_fmt = ispif_get_format,
1076         .set_fmt = ispif_set_format,
1077 };
1078
1079 static const struct v4l2_subdev_ops ispif_v4l2_ops = {
1080         .core = &ispif_core_ops,
1081         .video = &ispif_video_ops,
1082         .pad = &ispif_pad_ops,
1083 };
1084
1085 static const struct v4l2_subdev_internal_ops ispif_v4l2_internal_ops = {
1086         .open = ispif_init_formats,
1087 };
1088
1089 static const struct media_entity_operations ispif_media_ops = {
1090         .link_setup = ispif_link_setup,
1091         .link_validate = v4l2_subdev_link_validate,
1092 };
1093
1094 /*
1095  * msm_ispif_register_entities - Register subdev node for ISPIF module
1096  * @ispif: ISPIF device
1097  * @v4l2_dev: V4L2 device
1098  *
1099  * Return 0 on success or a negative error code otherwise
1100  */
1101 int msm_ispif_register_entities(struct ispif_device *ispif,
1102                                 struct v4l2_device *v4l2_dev)
1103 {
1104         struct device *dev = to_device(ispif);
1105         int ret;
1106         int i;
1107
1108         for (i = 0; i < ARRAY_SIZE(ispif->line); i++) {
1109                 struct v4l2_subdev *sd = &ispif->line[i].subdev;
1110                 struct media_pad *pads = ispif->line[i].pads;
1111
1112                 v4l2_subdev_init(sd, &ispif_v4l2_ops);
1113                 sd->internal_ops = &ispif_v4l2_internal_ops;
1114                 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1115                 snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d",
1116                          MSM_ISPIF_NAME, i);
1117                 v4l2_set_subdevdata(sd, &ispif->line[i]);
1118
1119                 ret = ispif_init_formats(sd, NULL);
1120                 if (ret < 0) {
1121                         dev_err(dev, "Failed to init format: %d\n", ret);
1122                         goto error;
1123                 }
1124
1125                 pads[MSM_ISPIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1126                 pads[MSM_ISPIF_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
1127
1128                 sd->entity.function = MEDIA_ENT_F_IO_V4L;
1129                 sd->entity.ops = &ispif_media_ops;
1130                 ret = media_entity_pads_init(&sd->entity, MSM_ISPIF_PADS_NUM,
1131                                              pads);
1132                 if (ret < 0) {
1133                         dev_err(dev, "Failed to init media entity: %d\n", ret);
1134                         goto error;
1135                 }
1136
1137                 ret = v4l2_device_register_subdev(v4l2_dev, sd);
1138                 if (ret < 0) {
1139                         dev_err(dev, "Failed to register subdev: %d\n", ret);
1140                         media_entity_cleanup(&sd->entity);
1141                         goto error;
1142                 }
1143         }
1144
1145         return 0;
1146
1147 error:
1148         for (i--; i >= 0; i--) {
1149                 struct v4l2_subdev *sd = &ispif->line[i].subdev;
1150
1151                 v4l2_device_unregister_subdev(sd);
1152                 media_entity_cleanup(&sd->entity);
1153         }
1154
1155         return ret;
1156 }
1157
1158 /*
1159  * msm_ispif_unregister_entities - Unregister ISPIF module subdev node
1160  * @ispif: ISPIF device
1161  */
1162 void msm_ispif_unregister_entities(struct ispif_device *ispif)
1163 {
1164         int i;
1165
1166         mutex_destroy(&ispif->power_lock);
1167         mutex_destroy(&ispif->config_lock);
1168
1169         for (i = 0; i < ARRAY_SIZE(ispif->line); i++) {
1170                 struct v4l2_subdev *sd = &ispif->line[i].subdev;
1171
1172                 v4l2_device_unregister_subdev(sd);
1173                 media_entity_cleanup(&sd->entity);
1174         }
1175 }