kernel/drivers/media/platform/s5p-tv/hdmi_drv.c

   1 /*
   2  * Samsung HDMI interface driver
   3  *
   4  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   5  *
   6  * Tomasz Stanislawski, <t.stanislaws@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published
  10  * by the Free Software Foundiation. either version 2 of the License,
  11  * or (at your option) any later version
  12  */
  13
  14 #define pr_fmt(fmt) "s5p-tv (hdmi_drv): " fmt
  15
  16 #ifdef CONFIG_VIDEO_SAMSUNG_S5P_HDMI_DEBUG
  17 #define DEBUG
  18 #endif
  19
  20 #include <linux/kernel.h>
  21 #include <linux/slab.h>
  22 #include <linux/io.h>
  23 #include <linux/i2c.h>
  24 #include <linux/platform_device.h>
  25 #include <media/v4l2-subdev.h>
  26 #include <linux/module.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/irq.h>
  29 #include <linux/delay.h>
  30 #include <linux/bug.h>
  31 #include <linux/pm_runtime.h>
  32 #include <linux/clk.h>
  33 #include <linux/regulator/consumer.h>
  34 #include <linux/v4l2-dv-timings.h>
  35
  36 #include <media/s5p_hdmi.h>
  37 #include <media/v4l2-common.h>
  38 #include <media/v4l2-dev.h>
  39 #include <media/v4l2-device.h>
  40 #include <media/v4l2-dv-timings.h>
  41
  42 #include "regs-hdmi.h"
  43
  44 MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
  45 MODULE_DESCRIPTION("Samsung HDMI");
  46 MODULE_LICENSE("GPL");
  47
  48 struct hdmi_pulse {
  49         u32 beg;
  50         u32 end;
  51 };
  52
  53 struct hdmi_timings {
  54         struct hdmi_pulse hact;
  55         u32 hsyn_pol; /* 0 - high, 1 - low */
  56         struct hdmi_pulse hsyn;
  57         u32 interlaced;
  58         struct hdmi_pulse vact[2];
  59         u32 vsyn_pol; /* 0 - high, 1 - low */
  60         u32 vsyn_off;
  61         struct hdmi_pulse vsyn[2];
  62 };
  63
  64 struct hdmi_resources {
  65         struct clk *hdmi;
  66         struct clk *sclk_hdmi;
  67         struct clk *sclk_pixel;
  68         struct clk *sclk_hdmiphy;
  69         struct clk *hdmiphy;
  70         struct regulator_bulk_data *regul_bulk;
  71         int regul_count;
  72 };
  73
  74 struct hdmi_device {
  75         /** base address of HDMI registers */
  76         void __iomem *regs;
  77         /** HDMI interrupt */
  78         unsigned int irq;
  79         /** pointer to device parent */
  80         struct device *dev;
  81         /** subdev generated by HDMI device */
  82         struct v4l2_subdev sd;
  83         /** V4L2 device structure */
  84         struct v4l2_device v4l2_dev;
  85         /** subdev of HDMIPHY interface */
  86         struct v4l2_subdev *phy_sd;
  87         /** subdev of MHL interface */
  88         struct v4l2_subdev *mhl_sd;
  89         /** configuration of current graphic mode */
  90         const struct hdmi_timings *cur_conf;
  91         /** flag indicating that timings are dirty */
  92         int cur_conf_dirty;
  93         /** current timings */
  94         struct v4l2_dv_timings cur_timings;
  95         /** other resources */
  96         struct hdmi_resources res;
  97 };
  98
  99 static struct platform_device_id hdmi_driver_types[] = {
 100         {
 101                 .name           = "s5pv210-hdmi",
 102         }, {
 103                 .name           = "exynos4-hdmi",
 104         }, {
 105                 /* end node */
 106         }
 107 };
 108
 109 static const struct v4l2_subdev_ops hdmi_sd_ops;
 110
 111 static struct hdmi_device *sd_to_hdmi_dev(struct v4l2_subdev *sd)
 112 {
 113         return container_of(sd, struct hdmi_device, sd);
 114 }
 115
 116 static inline
 117 void hdmi_write(struct hdmi_device *hdev, u32 reg_id, u32 value)
 118 {
 119         writel(value, hdev->regs + reg_id);
 120 }
 121
 122 static inline
 123 void hdmi_write_mask(struct hdmi_device *hdev, u32 reg_id, u32 value, u32 mask)
 124 {
 125         u32 old = readl(hdev->regs + reg_id);
 126         value = (value & mask) | (old & ~mask);
 127         writel(value, hdev->regs + reg_id);
 128 }
 129
 130 static inline
 131 void hdmi_writeb(struct hdmi_device *hdev, u32 reg_id, u8 value)
 132 {
 133         writeb(value, hdev->regs + reg_id);
 134 }
 135
 136 static inline
 137 void hdmi_writebn(struct hdmi_device *hdev, u32 reg_id, int n, u32 value)
 138 {
 139         switch (n) {
 140         default:
 141                 writeb(value >> 24, hdev->regs + reg_id + 12);
 142         case 3:
 143                 writeb(value >> 16, hdev->regs + reg_id + 8);
 144         case 2:
 145                 writeb(value >>  8, hdev->regs + reg_id + 4);
 146         case 1:
 147                 writeb(value >>  0, hdev->regs + reg_id + 0);
 148         }
 149 }
 150
 151 static inline u32 hdmi_read(struct hdmi_device *hdev, u32 reg_id)
 152 {
 153         return readl(hdev->regs + reg_id);
 154 }
 155
 156 static irqreturn_t hdmi_irq_handler(int irq, void *dev_data)
 157 {
 158         struct hdmi_device *hdev = dev_data;
 159         u32 intc_flag;
 160
 161         (void)irq;
 162         intc_flag = hdmi_read(hdev, HDMI_INTC_FLAG);
 163         /* clearing flags for HPD plug/unplug */
 164         if (intc_flag & HDMI_INTC_FLAG_HPD_UNPLUG) {
 165                 pr_info("unplugged\n");
 166                 hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
 167                         HDMI_INTC_FLAG_HPD_UNPLUG);
 168         }
 169         if (intc_flag & HDMI_INTC_FLAG_HPD_PLUG) {
 170                 pr_info("plugged\n");
 171                 hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
 172                         HDMI_INTC_FLAG_HPD_PLUG);
 173         }
 174
 175         return IRQ_HANDLED;
 176 }
 177
 178 static void hdmi_reg_init(struct hdmi_device *hdev)
 179 {
 180         /* enable HPD interrupts */
 181         hdmi_write_mask(hdev, HDMI_INTC_CON, ~0, HDMI_INTC_EN_GLOBAL |
 182                 HDMI_INTC_EN_HPD_PLUG | HDMI_INTC_EN_HPD_UNPLUG);
 183         /* choose DVI mode */
 184         hdmi_write_mask(hdev, HDMI_MODE_SEL,
 185                 HDMI_MODE_DVI_EN, HDMI_MODE_MASK);
 186         hdmi_write_mask(hdev, HDMI_CON_2, ~0,
 187                 HDMI_DVI_PERAMBLE_EN | HDMI_DVI_BAND_EN);
 188         /* disable bluescreen */
 189         hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_BLUE_SCR_EN);
 190         /* choose bluescreen (fecal) color */
 191         hdmi_writeb(hdev, HDMI_BLUE_SCREEN_0, 0x12);
 192         hdmi_writeb(hdev, HDMI_BLUE_SCREEN_1, 0x34);
 193         hdmi_writeb(hdev, HDMI_BLUE_SCREEN_2, 0x56);
 194 }
 195
 196 static void hdmi_timing_apply(struct hdmi_device *hdev,
 197         const struct hdmi_timings *t)
 198 {
 199         /* setting core registers */
 200         hdmi_writebn(hdev, HDMI_H_BLANK_0, 2, t->hact.beg);
 201         hdmi_writebn(hdev, HDMI_H_SYNC_GEN_0, 3,
 202                 (t->hsyn_pol << 20) | (t->hsyn.end << 10) | t->hsyn.beg);
 203         hdmi_writeb(hdev, HDMI_VSYNC_POL, t->vsyn_pol);
 204         hdmi_writebn(hdev, HDMI_V_BLANK_0, 3,
 205                 (t->vact[0].beg << 11) | t->vact[0].end);
 206         hdmi_writebn(hdev, HDMI_V_SYNC_GEN_1_0, 3,
 207                 (t->vsyn[0].beg << 12) | t->vsyn[0].end);
 208         if (t->interlaced) {
 209                 u32 vsyn_trans = t->hsyn.beg + t->vsyn_off;
 210
 211                 hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 1);
 212                 hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
 213                         (t->hact.end << 12) | t->vact[1].end);
 214                 hdmi_writebn(hdev, HDMI_V_BLANK_F_0, 3,
 215                         (t->vact[1].end << 11) | t->vact[1].beg);
 216                 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_2_0, 3,
 217                         (t->vsyn[1].beg << 12) | t->vsyn[1].end);
 218                 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_3_0, 3,
 219                         (vsyn_trans << 12) | vsyn_trans);
 220         } else {
 221                 hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 0);
 222                 hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
 223                         (t->hact.end << 12) | t->vact[0].end);
 224         }
 225
 226         /* Timing generator registers */
 227         hdmi_writebn(hdev, HDMI_TG_H_FSZ_L, 2, t->hact.end);
 228         hdmi_writebn(hdev, HDMI_TG_HACT_ST_L, 2, t->hact.beg);
 229         hdmi_writebn(hdev, HDMI_TG_HACT_SZ_L, 2, t->hact.end - t->hact.beg);
 230         hdmi_writebn(hdev, HDMI_TG_VSYNC_L, 2, t->vsyn[0].beg);
 231         hdmi_writebn(hdev, HDMI_TG_VACT_ST_L, 2, t->vact[0].beg);
 232         hdmi_writebn(hdev, HDMI_TG_VACT_SZ_L, 2,
 233                 t->vact[0].end - t->vact[0].beg);
 234         hdmi_writebn(hdev, HDMI_TG_VSYNC_TOP_HDMI_L, 2, t->vsyn[0].beg);
 235         hdmi_writebn(hdev, HDMI_TG_FIELD_TOP_HDMI_L, 2, t->vsyn[0].beg);
 236         if (t->interlaced) {
 237                 hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_FIELD_EN);
 238                 hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[1].end);
 239                 hdmi_writebn(hdev, HDMI_TG_VSYNC2_L, 2, t->vsyn[1].beg);
 240                 hdmi_writebn(hdev, HDMI_TG_FIELD_CHG_L, 2, t->vact[0].end);
 241                 hdmi_writebn(hdev, HDMI_TG_VACT_ST2_L, 2, t->vact[1].beg);
 242                 hdmi_writebn(hdev, HDMI_TG_VSYNC_BOT_HDMI_L, 2, t->vsyn[1].beg);
 243                 hdmi_writebn(hdev, HDMI_TG_FIELD_BOT_HDMI_L, 2, t->vsyn[1].beg);
 244         } else {
 245                 hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_FIELD_EN);
 246                 hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[0].end);
 247         }
 248 }
 249
 250 static int hdmi_conf_apply(struct hdmi_device *hdmi_dev)
 251 {
 252         struct device *dev = hdmi_dev->dev;
 253         const struct hdmi_timings *conf = hdmi_dev->cur_conf;
 254         int ret;
 255
 256         dev_dbg(dev, "%s\n", __func__);
 257
 258         /* skip if conf is already synchronized with HW */
 259         if (!hdmi_dev->cur_conf_dirty)
 260                 return 0;
 261
 262         /* reset hdmiphy */
 263         hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);
 264         mdelay(10);
 265         hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT,  0, HDMI_PHY_SW_RSTOUT);
 266         mdelay(10);
 267
 268         /* configure timings */
 269         ret = v4l2_subdev_call(hdmi_dev->phy_sd, video, s_dv_timings,
 270                                 &hdmi_dev->cur_timings);
 271         if (ret) {
 272                 dev_err(dev, "failed to set timings\n");
 273                 return ret;
 274         }
 275
 276         /* resetting HDMI core */
 277         hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT,  0, HDMI_CORE_SW_RSTOUT);
 278         mdelay(10);
 279         hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT, ~0, HDMI_CORE_SW_RSTOUT);
 280         mdelay(10);
 281
 282         hdmi_reg_init(hdmi_dev);
 283
 284         /* setting core registers */
 285         hdmi_timing_apply(hdmi_dev, conf);
 286
 287         hdmi_dev->cur_conf_dirty = 0;
 288
 289         return 0;
 290 }
 291
 292 static void hdmi_dumpregs(struct hdmi_device *hdev, char *prefix)
 293 {
 294 #define DUMPREG(reg_id) \
 295         dev_dbg(hdev->dev, "%s:" #reg_id " = %08x\n", prefix, \
 296                 readl(hdev->regs + reg_id))
 297
 298         dev_dbg(hdev->dev, "%s: ---- CONTROL REGISTERS ----\n", prefix);
 299         DUMPREG(HDMI_INTC_FLAG);
 300         DUMPREG(HDMI_INTC_CON);
 301         DUMPREG(HDMI_HPD_STATUS);
 302         DUMPREG(HDMI_PHY_RSTOUT);
 303         DUMPREG(HDMI_PHY_VPLL);
 304         DUMPREG(HDMI_PHY_CMU);
 305         DUMPREG(HDMI_CORE_RSTOUT);
 306
 307         dev_dbg(hdev->dev, "%s: ---- CORE REGISTERS ----\n", prefix);
 308         DUMPREG(HDMI_CON_0);
 309         DUMPREG(HDMI_CON_1);
 310         DUMPREG(HDMI_CON_2);
 311         DUMPREG(HDMI_SYS_STATUS);
 312         DUMPREG(HDMI_PHY_STATUS);
 313         DUMPREG(HDMI_STATUS_EN);
 314         DUMPREG(HDMI_HPD);
 315         DUMPREG(HDMI_MODE_SEL);
 316         DUMPREG(HDMI_HPD_GEN);
 317         DUMPREG(HDMI_DC_CONTROL);
 318         DUMPREG(HDMI_VIDEO_PATTERN_GEN);
 319
 320         dev_dbg(hdev->dev, "%s: ---- CORE SYNC REGISTERS ----\n", prefix);
 321         DUMPREG(HDMI_H_BLANK_0);
 322         DUMPREG(HDMI_H_BLANK_1);
 323         DUMPREG(HDMI_V_BLANK_0);
 324         DUMPREG(HDMI_V_BLANK_1);
 325         DUMPREG(HDMI_V_BLANK_2);
 326         DUMPREG(HDMI_H_V_LINE_0);
 327         DUMPREG(HDMI_H_V_LINE_1);
 328         DUMPREG(HDMI_H_V_LINE_2);
 329         DUMPREG(HDMI_VSYNC_POL);
 330         DUMPREG(HDMI_INT_PRO_MODE);
 331         DUMPREG(HDMI_V_BLANK_F_0);
 332         DUMPREG(HDMI_V_BLANK_F_1);
 333         DUMPREG(HDMI_V_BLANK_F_2);
 334         DUMPREG(HDMI_H_SYNC_GEN_0);
 335         DUMPREG(HDMI_H_SYNC_GEN_1);
 336         DUMPREG(HDMI_H_SYNC_GEN_2);
 337         DUMPREG(HDMI_V_SYNC_GEN_1_0);
 338         DUMPREG(HDMI_V_SYNC_GEN_1_1);
 339         DUMPREG(HDMI_V_SYNC_GEN_1_2);
 340         DUMPREG(HDMI_V_SYNC_GEN_2_0);
 341         DUMPREG(HDMI_V_SYNC_GEN_2_1);
 342         DUMPREG(HDMI_V_SYNC_GEN_2_2);
 343         DUMPREG(HDMI_V_SYNC_GEN_3_0);
 344         DUMPREG(HDMI_V_SYNC_GEN_3_1);
 345         DUMPREG(HDMI_V_SYNC_GEN_3_2);
 346
 347         dev_dbg(hdev->dev, "%s: ---- TG REGISTERS ----\n", prefix);
 348         DUMPREG(HDMI_TG_CMD);
 349         DUMPREG(HDMI_TG_H_FSZ_L);
 350         DUMPREG(HDMI_TG_H_FSZ_H);
 351         DUMPREG(HDMI_TG_HACT_ST_L);
 352         DUMPREG(HDMI_TG_HACT_ST_H);
 353         DUMPREG(HDMI_TG_HACT_SZ_L);
 354         DUMPREG(HDMI_TG_HACT_SZ_H);
 355         DUMPREG(HDMI_TG_V_FSZ_L);
 356         DUMPREG(HDMI_TG_V_FSZ_H);
 357         DUMPREG(HDMI_TG_VSYNC_L);
 358         DUMPREG(HDMI_TG_VSYNC_H);
 359         DUMPREG(HDMI_TG_VSYNC2_L);
 360         DUMPREG(HDMI_TG_VSYNC2_H);
 361         DUMPREG(HDMI_TG_VACT_ST_L);
 362         DUMPREG(HDMI_TG_VACT_ST_H);
 363         DUMPREG(HDMI_TG_VACT_SZ_L);
 364         DUMPREG(HDMI_TG_VACT_SZ_H);
 365         DUMPREG(HDMI_TG_FIELD_CHG_L);
 366         DUMPREG(HDMI_TG_FIELD_CHG_H);
 367         DUMPREG(HDMI_TG_VACT_ST2_L);
 368         DUMPREG(HDMI_TG_VACT_ST2_H);
 369         DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_L);
 370         DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_H);
 371         DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_L);
 372         DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_H);
 373         DUMPREG(HDMI_TG_FIELD_TOP_HDMI_L);
 374         DUMPREG(HDMI_TG_FIELD_TOP_HDMI_H);
 375         DUMPREG(HDMI_TG_FIELD_BOT_HDMI_L);
 376         DUMPREG(HDMI_TG_FIELD_BOT_HDMI_H);
 377 #undef DUMPREG
 378 }
 379
 380 static const struct hdmi_timings hdmi_timings_480p = {
 381         .hact = { .beg = 138, .end = 858 },
 382         .hsyn_pol = 1,
 383         .hsyn = { .beg = 16, .end = 16 + 62 },
 384         .interlaced = 0,
 385         .vact[0] = { .beg = 42 + 3, .end = 522 + 3 },
 386         .vsyn_pol = 1,
 387         .vsyn[0] = { .beg = 6 + 3, .end = 12 + 3},
 388 };
 389
 390 static const struct hdmi_timings hdmi_timings_576p50 = {
 391         .hact = { .beg = 144, .end = 864 },
 392         .hsyn_pol = 1,
 393         .hsyn = { .beg = 12, .end = 12 + 64 },
 394         .interlaced = 0,
 395         .vact[0] = { .beg = 44 + 5, .end = 620 + 5 },
 396         .vsyn_pol = 1,
 397         .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
 398 };
 399
 400 static const struct hdmi_timings hdmi_timings_720p60 = {
 401         .hact = { .beg = 370, .end = 1650 },
 402         .hsyn_pol = 0,
 403         .hsyn = { .beg = 110, .end = 110 + 40 },
 404         .interlaced = 0,
 405         .vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
 406         .vsyn_pol = 0,
 407         .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
 408 };
 409
 410 static const struct hdmi_timings hdmi_timings_720p50 = {
 411         .hact = { .beg = 700, .end = 1980 },
 412         .hsyn_pol = 0,
 413         .hsyn = { .beg = 440, .end = 440 + 40 },
 414         .interlaced = 0,
 415         .vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
 416         .vsyn_pol = 0,
 417         .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
 418 };
 419
 420 static const struct hdmi_timings hdmi_timings_1080p24 = {
 421         .hact = { .beg = 830, .end = 2750 },
 422         .hsyn_pol = 0,
 423         .hsyn = { .beg = 638, .end = 638 + 44 },
 424         .interlaced = 0,
 425         .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
 426         .vsyn_pol = 0,
 427         .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
 428 };
 429
 430 static const struct hdmi_timings hdmi_timings_1080p60 = {
 431         .hact = { .beg = 280, .end = 2200 },
 432         .hsyn_pol = 0,
 433         .hsyn = { .beg = 88, .end = 88 + 44 },
 434         .interlaced = 0,
 435         .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
 436         .vsyn_pol = 0,
 437         .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
 438 };
 439
 440 static const struct hdmi_timings hdmi_timings_1080i60 = {
 441         .hact = { .beg = 280, .end = 2200 },
 442         .hsyn_pol = 0,
 443         .hsyn = { .beg = 88, .end = 88 + 44 },
 444         .interlaced = 1,
 445         .vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
 446         .vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
 447         .vsyn_pol = 0,
 448         .vsyn_off = 1100,
 449         .vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
 450         .vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
 451 };
 452
 453 static const struct hdmi_timings hdmi_timings_1080i50 = {
 454         .hact = { .beg = 720, .end = 2640 },
 455         .hsyn_pol = 0,
 456         .hsyn = { .beg = 528, .end = 528 + 44 },
 457         .interlaced = 1,
 458         .vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
 459         .vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
 460         .vsyn_pol = 0,
 461         .vsyn_off = 1320,
 462         .vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
 463         .vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
 464 };
 465
 466 static const struct hdmi_timings hdmi_timings_1080p50 = {
 467         .hact = { .beg = 720, .end = 2640 },
 468         .hsyn_pol = 0,
 469         .hsyn = { .beg = 528, .end = 528 + 44 },
 470         .interlaced = 0,
 471         .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
 472         .vsyn_pol = 0,
 473         .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
 474 };
 475
 476 /* default hdmi_timings index of the timings configured on probe */
 477 #define HDMI_DEFAULT_TIMINGS_IDX (0)
 478
 479 static const struct {
 480         bool reduced_fps;
 481         const struct v4l2_dv_timings dv_timings;
 482         const struct hdmi_timings *hdmi_timings;
 483 } hdmi_timings[] = {
 484         { false, V4L2_DV_BT_CEA_720X480P59_94, &hdmi_timings_480p    },
 485         { false, V4L2_DV_BT_CEA_720X576P50,    &hdmi_timings_576p50  },
 486         { false, V4L2_DV_BT_CEA_1280X720P50,   &hdmi_timings_720p50  },
 487         { true,  V4L2_DV_BT_CEA_1280X720P60,   &hdmi_timings_720p60  },
 488         { false, V4L2_DV_BT_CEA_1920X1080P24,  &hdmi_timings_1080p24 },
 489         { false, V4L2_DV_BT_CEA_1920X1080P30,  &hdmi_timings_1080p60 },
 490         { false, V4L2_DV_BT_CEA_1920X1080P50,  &hdmi_timings_1080p50 },
 491         { false, V4L2_DV_BT_CEA_1920X1080I50,  &hdmi_timings_1080i50 },
 492         { false, V4L2_DV_BT_CEA_1920X1080I60,  &hdmi_timings_1080i60 },
 493         { false, V4L2_DV_BT_CEA_1920X1080P60,  &hdmi_timings_1080p60 },
 494 };
 495
 496 static int hdmi_streamon(struct hdmi_device *hdev)
 497 {
 498         struct device *dev = hdev->dev;
 499         struct hdmi_resources *res = &hdev->res;
 500         int ret, tries;
 501
 502         dev_dbg(dev, "%s\n", __func__);
 503
 504         ret = hdmi_conf_apply(hdev);
 505         if (ret)
 506                 return ret;
 507
 508         ret = v4l2_subdev_call(hdev->phy_sd, video, s_stream, 1);
 509         if (ret)
 510                 return ret;
 511
 512         /* waiting for HDMIPHY's PLL to get to steady state */
 513         for (tries = 100; tries; --tries) {
 514                 u32 val = hdmi_read(hdev, HDMI_PHY_STATUS);
 515                 if (val & HDMI_PHY_STATUS_READY)
 516                         break;
 517                 mdelay(1);
 518         }
 519         /* steady state not achieved */
 520         if (tries == 0) {
 521                 dev_err(dev, "hdmiphy's pll could not reach steady state.\n");
 522                 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
 523                 hdmi_dumpregs(hdev, "hdmiphy - s_stream");
 524                 return -EIO;
 525         }
 526
 527         /* starting MHL */
 528         ret = v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 1);
 529         if (hdev->mhl_sd && ret) {
 530                 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
 531                 hdmi_dumpregs(hdev, "mhl - s_stream");
 532                 return -EIO;
 533         }
 534
 535         /* hdmiphy clock is used for HDMI in streaming mode */
 536         clk_disable(res->sclk_hdmi);
 537         clk_set_parent(res->sclk_hdmi, res->sclk_hdmiphy);
 538         clk_enable(res->sclk_hdmi);
 539
 540         /* enable HDMI and timing generator */
 541         hdmi_write_mask(hdev, HDMI_CON_0, ~0, HDMI_EN);
 542         hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_EN);
 543         hdmi_dumpregs(hdev, "streamon");
 544         return 0;
 545 }
 546
 547 static int hdmi_streamoff(struct hdmi_device *hdev)
 548 {
 549         struct device *dev = hdev->dev;
 550         struct hdmi_resources *res = &hdev->res;
 551
 552         dev_dbg(dev, "%s\n", __func__);
 553
 554         hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_EN);
 555         hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_EN);
 556
 557         /* pixel(vpll) clock is used for HDMI in config mode */
 558         clk_disable(res->sclk_hdmi);
 559         clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
 560         clk_enable(res->sclk_hdmi);
 561
 562         v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 0);
 563         v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
 564
 565         hdmi_dumpregs(hdev, "streamoff");
 566         return 0;
 567 }
 568
 569 static int hdmi_s_stream(struct v4l2_subdev *sd, int enable)
 570 {
 571         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
 572         struct device *dev = hdev->dev;
 573
 574         dev_dbg(dev, "%s(%d)\n", __func__, enable);
 575         if (enable)
 576                 return hdmi_streamon(hdev);
 577         return hdmi_streamoff(hdev);
 578 }
 579
 580 static int hdmi_resource_poweron(struct hdmi_resources *res)
 581 {
 582         int ret;
 583
 584         /* turn HDMI power on */
 585         ret = regulator_bulk_enable(res->regul_count, res->regul_bulk);
 586         if (ret < 0)
 587                 return ret;
 588         /* power-on hdmi physical interface */
 589         clk_enable(res->hdmiphy);
 590         /* use VPP as parent clock; HDMIPHY is not working yet */
 591         clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
 592         /* turn clocks on */
 593         clk_enable(res->sclk_hdmi);
 594
 595         return 0;
 596 }
 597
 598 static void hdmi_resource_poweroff(struct hdmi_resources *res)
 599 {
 600         /* turn clocks off */
 601         clk_disable(res->sclk_hdmi);
 602         /* power-off hdmiphy */
 603         clk_disable(res->hdmiphy);
 604         /* turn HDMI power off */
 605         regulator_bulk_disable(res->regul_count, res->regul_bulk);
 606 }
 607
 608 static int hdmi_s_power(struct v4l2_subdev *sd, int on)
 609 {
 610         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
 611         int ret;
 612
 613         if (on)
 614                 ret = pm_runtime_get_sync(hdev->dev);
 615         else
 616                 ret = pm_runtime_put_sync(hdev->dev);
 617         /* only values < 0 indicate errors */
 618         return ret < 0 ? ret : 0;
 619 }
 620
 621 static int hdmi_s_dv_timings(struct v4l2_subdev *sd,
 622         struct v4l2_dv_timings *timings)
 623 {
 624         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
 625         struct device *dev = hdev->dev;
 626         int i;
 627
 628         for (i = 0; i < ARRAY_SIZE(hdmi_timings); i++)
 629                 if (v4l2_match_dv_timings(&hdmi_timings[i].dv_timings,
 630                                         timings, 0))
 631                         break;
 632         if (i == ARRAY_SIZE(hdmi_timings)) {
 633                 dev_err(dev, "timings not supported\n");
 634                 return -EINVAL;
 635         }
 636         hdev->cur_conf = hdmi_timings[i].hdmi_timings;
 637         hdev->cur_conf_dirty = 1;
 638         hdev->cur_timings = *timings;
 639         if (!hdmi_timings[i].reduced_fps)
 640                 hdev->cur_timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
 641         return 0;
 642 }
 643
 644 static int hdmi_g_dv_timings(struct v4l2_subdev *sd,
 645         struct v4l2_dv_timings *timings)
 646 {
 647         *timings = sd_to_hdmi_dev(sd)->cur_timings;
 648         return 0;
 649 }
 650
 651 static int hdmi_g_mbus_fmt(struct v4l2_subdev *sd,
 652           struct v4l2_mbus_framefmt *fmt)
 653 {
 654         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
 655         const struct hdmi_timings *t = hdev->cur_conf;
 656
 657         dev_dbg(hdev->dev, "%s\n", __func__);
 658         if (!hdev->cur_conf)
 659                 return -EINVAL;
 660         memset(fmt, 0, sizeof(*fmt));
 661         fmt->width = t->hact.end - t->hact.beg;
 662         fmt->height = t->vact[0].end - t->vact[0].beg;
 663         fmt->code = MEDIA_BUS_FMT_FIXED; /* means RGB888 */
 664         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 665         if (t->interlaced) {
 666                 fmt->field = V4L2_FIELD_INTERLACED;
 667                 fmt->height *= 2;
 668         } else {
 669                 fmt->field = V4L2_FIELD_NONE;
 670         }
 671         return 0;
 672 }
 673
 674 static int hdmi_enum_dv_timings(struct v4l2_subdev *sd,
 675         struct v4l2_enum_dv_timings *timings)
 676 {
 677         if (timings->pad != 0)
 678                 return -EINVAL;
 679         if (timings->index >= ARRAY_SIZE(hdmi_timings))
 680                 return -EINVAL;
 681         timings->timings = hdmi_timings[timings->index].dv_timings;
 682         if (!hdmi_timings[timings->index].reduced_fps)
 683                 timings->timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
 684         return 0;
 685 }
 686
 687 static int hdmi_dv_timings_cap(struct v4l2_subdev *sd,
 688         struct v4l2_dv_timings_cap *cap)
 689 {
 690         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
 691
 692         if (cap->pad != 0)
 693                 return -EINVAL;
 694
 695         /* Let the phy fill in the pixelclock range */
 696         v4l2_subdev_call(hdev->phy_sd, pad, dv_timings_cap, cap);
 697         cap->type = V4L2_DV_BT_656_1120;
 698         cap->bt.min_width = 720;
 699         cap->bt.max_width = 1920;
 700         cap->bt.min_height = 480;
 701         cap->bt.max_height = 1080;
 702         cap->bt.standards = V4L2_DV_BT_STD_CEA861;
 703         cap->bt.capabilities = V4L2_DV_BT_CAP_INTERLACED |
 704                                V4L2_DV_BT_CAP_PROGRESSIVE;
 705         return 0;
 706 }
 707
 708 static const struct v4l2_subdev_core_ops hdmi_sd_core_ops = {
 709         .s_power = hdmi_s_power,
 710 };
 711
 712 static const struct v4l2_subdev_video_ops hdmi_sd_video_ops = {
 713         .s_dv_timings = hdmi_s_dv_timings,
 714         .g_dv_timings = hdmi_g_dv_timings,
 715         .g_mbus_fmt = hdmi_g_mbus_fmt,
 716         .s_stream = hdmi_s_stream,
 717 };
 718
 719 static const struct v4l2_subdev_pad_ops hdmi_sd_pad_ops = {
 720         .enum_dv_timings = hdmi_enum_dv_timings,
 721         .dv_timings_cap = hdmi_dv_timings_cap,
 722 };
 723
 724 static const struct v4l2_subdev_ops hdmi_sd_ops = {
 725         .core = &hdmi_sd_core_ops,
 726         .video = &hdmi_sd_video_ops,
 727 };
 728
 729 static int hdmi_runtime_suspend(struct device *dev)
 730 {
 731         struct v4l2_subdev *sd = dev_get_drvdata(dev);
 732         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
 733
 734         dev_dbg(dev, "%s\n", __func__);
 735         v4l2_subdev_call(hdev->mhl_sd, core, s_power, 0);
 736         hdmi_resource_poweroff(&hdev->res);
 737         /* flag that device context is lost */
 738         hdev->cur_conf_dirty = 1;
 739         return 0;
 740 }
 741
 742 static int hdmi_runtime_resume(struct device *dev)
 743 {
 744         struct v4l2_subdev *sd = dev_get_drvdata(dev);
 745         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
 746         int ret;
 747
 748         dev_dbg(dev, "%s\n", __func__);
 749
 750         ret = hdmi_resource_poweron(&hdev->res);
 751         if (ret < 0)
 752                 return ret;
 753
 754         /* starting MHL */
 755         ret = v4l2_subdev_call(hdev->mhl_sd, core, s_power, 1);
 756         if (hdev->mhl_sd && ret)
 757                 goto fail;
 758
 759         dev_dbg(dev, "poweron succeed\n");
 760
 761         return 0;
 762
 763 fail:
 764         hdmi_resource_poweroff(&hdev->res);
 765         dev_err(dev, "poweron failed\n");
 766
 767         return ret;
 768 }
 769
 770 static const struct dev_pm_ops hdmi_pm_ops = {
 771         .runtime_suspend = hdmi_runtime_suspend,
 772         .runtime_resume  = hdmi_runtime_resume,
 773 };
 774
 775 static void hdmi_resource_clear_clocks(struct hdmi_resources *res)
 776 {
 777         res->hdmi        = ERR_PTR(-EINVAL);
 778         res->sclk_hdmi   = ERR_PTR(-EINVAL);
 779         res->sclk_pixel  = ERR_PTR(-EINVAL);
 780         res->sclk_hdmiphy = ERR_PTR(-EINVAL);
 781         res->hdmiphy     = ERR_PTR(-EINVAL);
 782 }
 783
 784 static void hdmi_resources_cleanup(struct hdmi_device *hdev)
 785 {
 786         struct hdmi_resources *res = &hdev->res;
 787
 788         dev_dbg(hdev->dev, "HDMI resource cleanup\n");
 789         /* put clocks, power */
 790         if (res->regul_count)
 791                 regulator_bulk_free(res->regul_count, res->regul_bulk);
 792         /* kfree is NULL-safe */
 793         kfree(res->regul_bulk);
 794         if (!IS_ERR(res->hdmiphy))
 795                 clk_put(res->hdmiphy);
 796         if (!IS_ERR(res->sclk_hdmiphy))
 797                 clk_put(res->sclk_hdmiphy);
 798         if (!IS_ERR(res->sclk_pixel))
 799                 clk_put(res->sclk_pixel);
 800         if (!IS_ERR(res->sclk_hdmi))
 801                 clk_put(res->sclk_hdmi);
 802         if (!IS_ERR(res->hdmi))
 803                 clk_put(res->hdmi);
 804         memset(res, 0, sizeof(*res));
 805         hdmi_resource_clear_clocks(res);
 806 }
 807
 808 static int hdmi_resources_init(struct hdmi_device *hdev)
 809 {
 810         struct device *dev = hdev->dev;
 811         struct hdmi_resources *res = &hdev->res;
 812         static char *supply[] = {
 813                 "hdmi-en",
 814                 "vdd",
 815                 "vdd_osc",
 816                 "vdd_pll",
 817         };
 818         int i, ret;
 819
 820         dev_dbg(dev, "HDMI resource init\n");
 821
 822         memset(res, 0, sizeof(*res));
 823         hdmi_resource_clear_clocks(res);
 824
 825         /* get clocks, power */
 826         res->hdmi = clk_get(dev, "hdmi");
 827         if (IS_ERR(res->hdmi)) {
 828                 dev_err(dev, "failed to get clock 'hdmi'\n");
 829                 goto fail;
 830         }
 831         res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
 832         if (IS_ERR(res->sclk_hdmi)) {
 833                 dev_err(dev, "failed to get clock 'sclk_hdmi'\n");
 834                 goto fail;
 835         }
 836         res->sclk_pixel = clk_get(dev, "sclk_pixel");
 837         if (IS_ERR(res->sclk_pixel)) {
 838                 dev_err(dev, "failed to get clock 'sclk_pixel'\n");
 839                 goto fail;
 840         }
 841         res->sclk_hdmiphy = clk_get(dev, "sclk_hdmiphy");
 842         if (IS_ERR(res->sclk_hdmiphy)) {
 843                 dev_err(dev, "failed to get clock 'sclk_hdmiphy'\n");
 844                 goto fail;
 845         }
 846         res->hdmiphy = clk_get(dev, "hdmiphy");
 847         if (IS_ERR(res->hdmiphy)) {
 848                 dev_err(dev, "failed to get clock 'hdmiphy'\n");
 849                 goto fail;
 850         }
 851         res->regul_bulk = kcalloc(ARRAY_SIZE(supply),
 852                                   sizeof(res->regul_bulk[0]), GFP_KERNEL);
 853         if (!res->regul_bulk) {
 854                 dev_err(dev, "failed to get memory for regulators\n");
 855                 goto fail;
 856         }
 857         for (i = 0; i < ARRAY_SIZE(supply); ++i) {
 858                 res->regul_bulk[i].supply = supply[i];
 859                 res->regul_bulk[i].consumer = NULL;
 860         }
 861
 862         ret = regulator_bulk_get(dev, ARRAY_SIZE(supply), res->regul_bulk);
 863         if (ret) {
 864                 dev_err(dev, "failed to get regulators\n");
 865                 goto fail;
 866         }
 867         res->regul_count = ARRAY_SIZE(supply);
 868
 869         return 0;
 870 fail:
 871         dev_err(dev, "HDMI resource init - failed\n");
 872         hdmi_resources_cleanup(hdev);
 873         return -ENODEV;
 874 }
 875
 876 static int hdmi_probe(struct platform_device *pdev)
 877 {
 878         struct device *dev = &pdev->dev;
 879         struct resource *res;
 880         struct i2c_adapter *adapter;
 881         struct v4l2_subdev *sd;
 882         struct hdmi_device *hdmi_dev = NULL;
 883         struct s5p_hdmi_platform_data *pdata = dev->platform_data;
 884         int ret;
 885
 886         dev_dbg(dev, "probe start\n");
 887
 888         if (!pdata) {
 889                 dev_err(dev, "platform data is missing\n");
 890                 ret = -ENODEV;
 891                 goto fail;
 892         }
 893
 894         hdmi_dev = devm_kzalloc(&pdev->dev, sizeof(*hdmi_dev), GFP_KERNEL);
 895         if (!hdmi_dev) {
 896                 dev_err(dev, "out of memory\n");
 897                 ret = -ENOMEM;
 898                 goto fail;
 899         }
 900
 901         hdmi_dev->dev = dev;
 902
 903         ret = hdmi_resources_init(hdmi_dev);
 904         if (ret)
 905                 goto fail;
 906
 907         /* mapping HDMI registers */
 908         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 909         if (res == NULL) {
 910                 dev_err(dev, "get memory resource failed.\n");
 911                 ret = -ENXIO;
 912                 goto fail_init;
 913         }
 914
 915         hdmi_dev->regs = devm_ioremap(&pdev->dev, res->start,
 916                                       resource_size(res));
 917         if (hdmi_dev->regs == NULL) {
 918                 dev_err(dev, "register mapping failed.\n");
 919                 ret = -ENXIO;
 920                 goto fail_init;
 921         }
 922
 923         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 924         if (res == NULL) {
 925                 dev_err(dev, "get interrupt resource failed.\n");
 926                 ret = -ENXIO;
 927                 goto fail_init;
 928         }
 929
 930         ret = devm_request_irq(&pdev->dev, res->start, hdmi_irq_handler, 0,
 931                                "hdmi", hdmi_dev);
 932         if (ret) {
 933                 dev_err(dev, "request interrupt failed.\n");
 934                 goto fail_init;
 935         }
 936         hdmi_dev->irq = res->start;
 937
 938         /* setting v4l2 name to prevent WARN_ON in v4l2_device_register */
 939         strlcpy(hdmi_dev->v4l2_dev.name, dev_name(dev),
 940                 sizeof(hdmi_dev->v4l2_dev.name));
 941         /* passing NULL owner prevents driver from erasing drvdata */
 942         ret = v4l2_device_register(NULL, &hdmi_dev->v4l2_dev);
 943         if (ret) {
 944                 dev_err(dev, "could not register v4l2 device.\n");
 945                 goto fail_init;
 946         }
 947
 948         /* testing if hdmiphy info is present */
 949         if (!pdata->hdmiphy_info) {
 950                 dev_err(dev, "hdmiphy info is missing in platform data\n");
 951                 ret = -ENXIO;
 952                 goto fail_vdev;
 953         }
 954
 955         adapter = i2c_get_adapter(pdata->hdmiphy_bus);
 956         if (adapter == NULL) {
 957                 dev_err(dev, "hdmiphy adapter request failed\n");
 958                 ret = -ENXIO;
 959                 goto fail_vdev;
 960         }
 961
 962         hdmi_dev->phy_sd = v4l2_i2c_new_subdev_board(&hdmi_dev->v4l2_dev,
 963                 adapter, pdata->hdmiphy_info, NULL);
 964         /* on failure or not adapter is no longer useful */
 965         i2c_put_adapter(adapter);
 966         if (hdmi_dev->phy_sd == NULL) {
 967                 dev_err(dev, "missing subdev for hdmiphy\n");
 968                 ret = -ENODEV;
 969                 goto fail_vdev;
 970         }
 971
 972         /* initialization of MHL interface if present */
 973         if (pdata->mhl_info) {
 974                 adapter = i2c_get_adapter(pdata->mhl_bus);
 975                 if (adapter == NULL) {
 976                         dev_err(dev, "MHL adapter request failed\n");
 977                         ret = -ENXIO;
 978                         goto fail_vdev;
 979                 }
 980
 981                 hdmi_dev->mhl_sd = v4l2_i2c_new_subdev_board(
 982                         &hdmi_dev->v4l2_dev, adapter,
 983                         pdata->mhl_info, NULL);
 984                 /* on failure or not adapter is no longer useful */
 985                 i2c_put_adapter(adapter);
 986                 if (hdmi_dev->mhl_sd == NULL) {
 987                         dev_err(dev, "missing subdev for MHL\n");
 988                         ret = -ENODEV;
 989                         goto fail_vdev;
 990                 }
 991         }
 992
 993         clk_enable(hdmi_dev->res.hdmi);
 994
 995         pm_runtime_enable(dev);
 996
 997         sd = &hdmi_dev->sd;
 998         v4l2_subdev_init(sd, &hdmi_sd_ops);
 999         sd->owner = THIS_MODULE;
1000
1001         strlcpy(sd->name, "s5p-hdmi", sizeof(sd->name));
1002         hdmi_dev->cur_timings =
1003                 hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].dv_timings;
1004         /* FIXME: missing fail timings is not supported */
1005         hdmi_dev->cur_conf =
1006                 hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].hdmi_timings;
1007         hdmi_dev->cur_conf_dirty = 1;
1008
1009         /* storing subdev for call that have only access to struct device */
1010         dev_set_drvdata(dev, sd);
1011
1012         dev_info(dev, "probe successful\n");
1013
1014         return 0;
1015
1016 fail_vdev:
1017         v4l2_device_unregister(&hdmi_dev->v4l2_dev);
1018
1019 fail_init:
1020         hdmi_resources_cleanup(hdmi_dev);
1021
1022 fail:
1023         dev_err(dev, "probe failed\n");
1024         return ret;
1025 }
1026
1027 static int hdmi_remove(struct platform_device *pdev)
1028 {
1029         struct device *dev = &pdev->dev;
1030         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1031         struct hdmi_device *hdmi_dev = sd_to_hdmi_dev(sd);
1032
1033         pm_runtime_disable(dev);
1034         clk_disable(hdmi_dev->res.hdmi);
1035         v4l2_device_unregister(&hdmi_dev->v4l2_dev);
1036         disable_irq(hdmi_dev->irq);
1037         hdmi_resources_cleanup(hdmi_dev);
1038         dev_info(dev, "remove successful\n");
1039
1040         return 0;
1041 }
1042
1043 static struct platform_driver hdmi_driver __refdata = {
1044         .probe = hdmi_probe,
1045         .remove = hdmi_remove,
1046         .id_table = hdmi_driver_types,
1047         .driver = {
1048                 .name = "s5p-hdmi",
1049                 .pm = &hdmi_pm_ops,
1050         }
1051 };
1052
1053 module_platform_driver(hdmi_driver);