drivers/video/sh_mobile_hdmi.c

   1 /*
   2  * SH-Mobile High-Definition Multimedia Interface (HDMI) driver
   3  * for SLISHDMI13T and SLIPHDMIT IP cores
   4  *
   5  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/clk.h>
  13 #include <linux/console.h>
  14 #include <linux/delay.h>
  15 #include <linux/err.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/io.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/pm_runtime.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24 #include <linux/workqueue.h>
  25 #include <sound/soc-dapm.h>
  26 #include <sound/initval.h>
  27
  28 #include <video/sh_mobile_hdmi.h>
  29 #include <video/sh_mobile_lcdc.h>
  30
  31 #include "sh_mobile_lcdcfb.h"
  32
  33 #define HDMI_SYSTEM_CTRL                        0x00 /* System control */
  34 #define HDMI_L_R_DATA_SWAP_CTRL_RPKT            0x01 /* L/R data swap control,
  35                                                         bits 19..16 of 20-bit N for Audio Clock Regeneration packet */
  36 #define HDMI_20_BIT_N_FOR_AUDIO_RPKT_15_8       0x02 /* bits 15..8 of 20-bit N for Audio Clock Regeneration packet */
  37 #define HDMI_20_BIT_N_FOR_AUDIO_RPKT_7_0        0x03 /* bits 7..0 of 20-bit N for Audio Clock Regeneration packet */
  38 #define HDMI_SPDIF_AUDIO_SAMP_FREQ_CTS          0x04 /* SPDIF audio sampling frequency,
  39                                                         bits 19..16 of Internal CTS */
  40 #define HDMI_INTERNAL_CTS_15_8                  0x05 /* bits 15..8 of Internal CTS */
  41 #define HDMI_INTERNAL_CTS_7_0                   0x06 /* bits 7..0 of Internal CTS */
  42 #define HDMI_EXTERNAL_CTS_19_16                 0x07 /* External CTS */
  43 #define HDMI_EXTERNAL_CTS_15_8                  0x08 /* External CTS */
  44 #define HDMI_EXTERNAL_CTS_7_0                   0x09 /* External CTS */
  45 #define HDMI_AUDIO_SETTING_1                    0x0A /* Audio setting.1 */
  46 #define HDMI_AUDIO_SETTING_2                    0x0B /* Audio setting.2 */
  47 #define HDMI_I2S_AUDIO_SET                      0x0C /* I2S audio setting */
  48 #define HDMI_DSD_AUDIO_SET                      0x0D /* DSD audio setting */
  49 #define HDMI_DEBUG_MONITOR_1                    0x0E /* Debug monitor.1 */
  50 #define HDMI_DEBUG_MONITOR_2                    0x0F /* Debug monitor.2 */
  51 #define HDMI_I2S_INPUT_PIN_SWAP                 0x10 /* I2S input pin swap */
  52 #define HDMI_AUDIO_STATUS_BITS_SETTING_1        0x11 /* Audio status bits setting.1 */
  53 #define HDMI_AUDIO_STATUS_BITS_SETTING_2        0x12 /* Audio status bits setting.2 */
  54 #define HDMI_CATEGORY_CODE                      0x13 /* Category code */
  55 #define HDMI_SOURCE_NUM_AUDIO_WORD_LEN          0x14 /* Source number/Audio word length */
  56 #define HDMI_AUDIO_VIDEO_SETTING_1              0x15 /* Audio/Video setting.1 */
  57 #define HDMI_VIDEO_SETTING_1                    0x16 /* Video setting.1 */
  58 #define HDMI_DEEP_COLOR_MODES                   0x17 /* Deep Color Modes */
  59
  60 /* 12 16- and 10-bit Color space conversion parameters: 0x18..0x2f */
  61 #define HDMI_COLOR_SPACE_CONVERSION_PARAMETERS  0x18
  62
  63 #define HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS      0x30 /* External video parameter settings */
  64 #define HDMI_EXTERNAL_H_TOTAL_7_0               0x31 /* External horizontal total (LSB) */
  65 #define HDMI_EXTERNAL_H_TOTAL_11_8              0x32 /* External horizontal total (MSB) */
  66 #define HDMI_EXTERNAL_H_BLANK_7_0               0x33 /* External horizontal blank (LSB) */
  67 #define HDMI_EXTERNAL_H_BLANK_9_8               0x34 /* External horizontal blank (MSB) */
  68 #define HDMI_EXTERNAL_H_DELAY_7_0               0x35 /* External horizontal delay (LSB) */
  69 #define HDMI_EXTERNAL_H_DELAY_9_8               0x36 /* External horizontal delay (MSB) */
  70 #define HDMI_EXTERNAL_H_DURATION_7_0            0x37 /* External horizontal duration (LSB) */
  71 #define HDMI_EXTERNAL_H_DURATION_9_8            0x38 /* External horizontal duration (MSB) */
  72 #define HDMI_EXTERNAL_V_TOTAL_7_0               0x39 /* External vertical total (LSB) */
  73 #define HDMI_EXTERNAL_V_TOTAL_9_8               0x3A /* External vertical total (MSB) */
  74 #define HDMI_AUDIO_VIDEO_SETTING_2              0x3B /* Audio/Video setting.2 */
  75 #define HDMI_EXTERNAL_V_BLANK                   0x3D /* External vertical blank */
  76 #define HDMI_EXTERNAL_V_DELAY                   0x3E /* External vertical delay */
  77 #define HDMI_EXTERNAL_V_DURATION                0x3F /* External vertical duration */
  78 #define HDMI_CTRL_PKT_MANUAL_SEND_CONTROL       0x40 /* Control packet manual send control */
  79 #define HDMI_CTRL_PKT_AUTO_SEND                 0x41 /* Control packet auto send with VSYNC control */
  80 #define HDMI_AUTO_CHECKSUM_OPTION               0x42 /* Auto checksum option */
  81 #define HDMI_VIDEO_SETTING_2                    0x45 /* Video setting.2 */
  82 #define HDMI_OUTPUT_OPTION                      0x46 /* Output option */
  83 #define HDMI_SLIPHDMIT_PARAM_OPTION             0x51 /* SLIPHDMIT parameter option */
  84 #define HDMI_HSYNC_PMENT_AT_EMB_7_0             0x52 /* HSYNC placement at embedded sync (LSB) */
  85 #define HDMI_HSYNC_PMENT_AT_EMB_15_8            0x53 /* HSYNC placement at embedded sync (MSB) */
  86 #define HDMI_VSYNC_PMENT_AT_EMB_7_0             0x54 /* VSYNC placement at embedded sync (LSB) */
  87 #define HDMI_VSYNC_PMENT_AT_EMB_14_8            0x55 /* VSYNC placement at embedded sync (MSB) */
  88 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_1         0x56 /* SLIPHDMIT parameter settings.1 */
  89 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_2         0x57 /* SLIPHDMIT parameter settings.2 */
  90 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_3         0x58 /* SLIPHDMIT parameter settings.3 */
  91 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_5         0x59 /* SLIPHDMIT parameter settings.5 */
  92 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_6         0x5A /* SLIPHDMIT parameter settings.6 */
  93 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_7         0x5B /* SLIPHDMIT parameter settings.7 */
  94 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_8         0x5C /* SLIPHDMIT parameter settings.8 */
  95 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_9         0x5D /* SLIPHDMIT parameter settings.9 */
  96 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_10        0x5E /* SLIPHDMIT parameter settings.10 */
  97 #define HDMI_CTRL_PKT_BUF_INDEX                 0x5F /* Control packet buffer index */
  98 #define HDMI_CTRL_PKT_BUF_ACCESS_HB0            0x60 /* Control packet data buffer access window - HB0 */
  99 #define HDMI_CTRL_PKT_BUF_ACCESS_HB1            0x61 /* Control packet data buffer access window - HB1 */
 100 #define HDMI_CTRL_PKT_BUF_ACCESS_HB2            0x62 /* Control packet data buffer access window - HB2 */
 101 #define HDMI_CTRL_PKT_BUF_ACCESS_PB0            0x63 /* Control packet data buffer access window - PB0 */
 102 #define HDMI_CTRL_PKT_BUF_ACCESS_PB1            0x64 /* Control packet data buffer access window - PB1 */
 103 #define HDMI_CTRL_PKT_BUF_ACCESS_PB2            0x65 /* Control packet data buffer access window - PB2 */
 104 #define HDMI_CTRL_PKT_BUF_ACCESS_PB3            0x66 /* Control packet data buffer access window - PB3 */
 105 #define HDMI_CTRL_PKT_BUF_ACCESS_PB4            0x67 /* Control packet data buffer access window - PB4 */
 106 #define HDMI_CTRL_PKT_BUF_ACCESS_PB5            0x68 /* Control packet data buffer access window - PB5 */
 107 #define HDMI_CTRL_PKT_BUF_ACCESS_PB6            0x69 /* Control packet data buffer access window - PB6 */
 108 #define HDMI_CTRL_PKT_BUF_ACCESS_PB7            0x6A /* Control packet data buffer access window - PB7 */
 109 #define HDMI_CTRL_PKT_BUF_ACCESS_PB8            0x6B /* Control packet data buffer access window - PB8 */
 110 #define HDMI_CTRL_PKT_BUF_ACCESS_PB9            0x6C /* Control packet data buffer access window - PB9 */
 111 #define HDMI_CTRL_PKT_BUF_ACCESS_PB10           0x6D /* Control packet data buffer access window - PB10 */
 112 #define HDMI_CTRL_PKT_BUF_ACCESS_PB11           0x6E /* Control packet data buffer access window - PB11 */
 113 #define HDMI_CTRL_PKT_BUF_ACCESS_PB12           0x6F /* Control packet data buffer access window - PB12 */
 114 #define HDMI_CTRL_PKT_BUF_ACCESS_PB13           0x70 /* Control packet data buffer access window - PB13 */
 115 #define HDMI_CTRL_PKT_BUF_ACCESS_PB14           0x71 /* Control packet data buffer access window - PB14 */
 116 #define HDMI_CTRL_PKT_BUF_ACCESS_PB15           0x72 /* Control packet data buffer access window - PB15 */
 117 #define HDMI_CTRL_PKT_BUF_ACCESS_PB16           0x73 /* Control packet data buffer access window - PB16 */
 118 #define HDMI_CTRL_PKT_BUF_ACCESS_PB17           0x74 /* Control packet data buffer access window - PB17 */
 119 #define HDMI_CTRL_PKT_BUF_ACCESS_PB18           0x75 /* Control packet data buffer access window - PB18 */
 120 #define HDMI_CTRL_PKT_BUF_ACCESS_PB19           0x76 /* Control packet data buffer access window - PB19 */
 121 #define HDMI_CTRL_PKT_BUF_ACCESS_PB20           0x77 /* Control packet data buffer access window - PB20 */
 122 #define HDMI_CTRL_PKT_BUF_ACCESS_PB21           0x78 /* Control packet data buffer access window - PB21 */
 123 #define HDMI_CTRL_PKT_BUF_ACCESS_PB22           0x79 /* Control packet data buffer access window - PB22 */
 124 #define HDMI_CTRL_PKT_BUF_ACCESS_PB23           0x7A /* Control packet data buffer access window - PB23 */
 125 #define HDMI_CTRL_PKT_BUF_ACCESS_PB24           0x7B /* Control packet data buffer access window - PB24 */
 126 #define HDMI_CTRL_PKT_BUF_ACCESS_PB25           0x7C /* Control packet data buffer access window - PB25 */
 127 #define HDMI_CTRL_PKT_BUF_ACCESS_PB26           0x7D /* Control packet data buffer access window - PB26 */
 128 #define HDMI_CTRL_PKT_BUF_ACCESS_PB27           0x7E /* Control packet data buffer access window - PB27 */
 129 #define HDMI_EDID_KSV_FIFO_ACCESS_WINDOW        0x80 /* EDID/KSV FIFO access window */
 130 #define HDMI_DDC_BUS_ACCESS_FREQ_CTRL_7_0       0x81 /* DDC bus access frequency control (LSB) */
 131 #define HDMI_DDC_BUS_ACCESS_FREQ_CTRL_15_8      0x82 /* DDC bus access frequency control (MSB) */
 132 #define HDMI_INTERRUPT_MASK_1                   0x92 /* Interrupt mask.1 */
 133 #define HDMI_INTERRUPT_MASK_2                   0x93 /* Interrupt mask.2 */
 134 #define HDMI_INTERRUPT_STATUS_1                 0x94 /* Interrupt status.1 */
 135 #define HDMI_INTERRUPT_STATUS_2                 0x95 /* Interrupt status.2 */
 136 #define HDMI_INTERRUPT_MASK_3                   0x96 /* Interrupt mask.3 */
 137 #define HDMI_INTERRUPT_MASK_4                   0x97 /* Interrupt mask.4 */
 138 #define HDMI_INTERRUPT_STATUS_3                 0x98 /* Interrupt status.3 */
 139 #define HDMI_INTERRUPT_STATUS_4                 0x99 /* Interrupt status.4 */
 140 #define HDMI_SOFTWARE_HDCP_CONTROL_1            0x9A /* Software HDCP control.1 */
 141 #define HDMI_FRAME_COUNTER                      0x9C /* Frame counter */
 142 #define HDMI_FRAME_COUNTER_FOR_RI_CHECK         0x9D /* Frame counter for Ri check */
 143 #define HDMI_HDCP_CONTROL                       0xAF /* HDCP control */
 144 #define HDMI_RI_FRAME_COUNT_REGISTER            0xB2 /* Ri frame count register */
 145 #define HDMI_DDC_BUS_CONTROL                    0xB7 /* DDC bus control */
 146 #define HDMI_HDCP_STATUS                        0xB8 /* HDCP status */
 147 #define HDMI_SHA0                               0xB9 /* sha0 */
 148 #define HDMI_SHA1                               0xBA /* sha1 */
 149 #define HDMI_SHA2                               0xBB /* sha2 */
 150 #define HDMI_SHA3                               0xBC /* sha3 */
 151 #define HDMI_SHA4                               0xBD /* sha4 */
 152 #define HDMI_BCAPS_READ                         0xBE /* BCAPS read / debug */
 153 #define HDMI_AKSV_BKSV_7_0_MONITOR              0xBF /* AKSV/BKSV[7:0] monitor */
 154 #define HDMI_AKSV_BKSV_15_8_MONITOR             0xC0 /* AKSV/BKSV[15:8] monitor */
 155 #define HDMI_AKSV_BKSV_23_16_MONITOR            0xC1 /* AKSV/BKSV[23:16] monitor */
 156 #define HDMI_AKSV_BKSV_31_24_MONITOR            0xC2 /* AKSV/BKSV[31:24] monitor */
 157 #define HDMI_AKSV_BKSV_39_32_MONITOR            0xC3 /* AKSV/BKSV[39:32] monitor */
 158 #define HDMI_EDID_SEGMENT_POINTER               0xC4 /* EDID segment pointer */
 159 #define HDMI_EDID_WORD_ADDRESS                  0xC5 /* EDID word address */
 160 #define HDMI_EDID_DATA_FIFO_ADDRESS             0xC6 /* EDID data FIFO address */
 161 #define HDMI_NUM_OF_HDMI_DEVICES                0xC7 /* Number of HDMI devices */
 162 #define HDMI_HDCP_ERROR_CODE                    0xC8 /* HDCP error code */
 163 #define HDMI_100MS_TIMER_SET                    0xC9 /* 100ms timer setting */
 164 #define HDMI_5SEC_TIMER_SET                     0xCA /* 5sec timer setting */
 165 #define HDMI_RI_READ_COUNT                      0xCB /* Ri read count */
 166 #define HDMI_AN_SEED                            0xCC /* An seed */
 167 #define HDMI_MAX_NUM_OF_RCIVRS_ALLOWED          0xCD /* Maximum number of receivers allowed */
 168 #define HDMI_HDCP_MEMORY_ACCESS_CONTROL_1       0xCE /* HDCP memory access control.1 */
 169 #define HDMI_HDCP_MEMORY_ACCESS_CONTROL_2       0xCF /* HDCP memory access control.2 */
 170 #define HDMI_HDCP_CONTROL_2                     0xD0 /* HDCP Control 2 */
 171 #define HDMI_HDCP_KEY_MEMORY_CONTROL            0xD2 /* HDCP Key Memory Control */
 172 #define HDMI_COLOR_SPACE_CONV_CONFIG_1          0xD3 /* Color space conversion configuration.1 */
 173 #define HDMI_VIDEO_SETTING_3                    0xD4 /* Video setting.3 */
 174 #define HDMI_RI_7_0                             0xD5 /* Ri[7:0] */
 175 #define HDMI_RI_15_8                            0xD6 /* Ri[15:8] */
 176 #define HDMI_PJ                                 0xD7 /* Pj */
 177 #define HDMI_SHA_RD                             0xD8 /* sha_rd */
 178 #define HDMI_RI_7_0_SAVED                       0xD9 /* Ri[7:0] saved */
 179 #define HDMI_RI_15_8_SAVED                      0xDA /* Ri[15:8] saved */
 180 #define HDMI_PJ_SAVED                           0xDB /* Pj saved */
 181 #define HDMI_NUM_OF_DEVICES                     0xDC /* Number of devices */
 182 #define HDMI_HOT_PLUG_MSENS_STATUS              0xDF /* Hot plug/MSENS status */
 183 #define HDMI_BCAPS_WRITE                        0xE0 /* bcaps */
 184 #define HDMI_BSTAT_7_0                          0xE1 /* bstat[7:0] */
 185 #define HDMI_BSTAT_15_8                         0xE2 /* bstat[15:8] */
 186 #define HDMI_BKSV_7_0                           0xE3 /* bksv[7:0] */
 187 #define HDMI_BKSV_15_8                          0xE4 /* bksv[15:8] */
 188 #define HDMI_BKSV_23_16                         0xE5 /* bksv[23:16] */
 189 #define HDMI_BKSV_31_24                         0xE6 /* bksv[31:24] */
 190 #define HDMI_BKSV_39_32                         0xE7 /* bksv[39:32] */
 191 #define HDMI_AN_7_0                             0xE8 /* An[7:0] */
 192 #define HDMI_AN_15_8                            0xE9 /* An [15:8] */
 193 #define HDMI_AN_23_16                           0xEA /* An [23:16] */
 194 #define HDMI_AN_31_24                           0xEB /* An [31:24] */
 195 #define HDMI_AN_39_32                           0xEC /* An [39:32] */
 196 #define HDMI_AN_47_40                           0xED /* An [47:40] */
 197 #define HDMI_AN_55_48                           0xEE /* An [55:48] */
 198 #define HDMI_AN_63_56                           0xEF /* An [63:56] */
 199 #define HDMI_PRODUCT_ID                         0xF0 /* Product ID */
 200 #define HDMI_REVISION_ID                        0xF1 /* Revision ID */
 201 #define HDMI_TEST_MODE                          0xFE /* Test mode */
 202
 203 enum hotplug_state {
 204         HDMI_HOTPLUG_DISCONNECTED,
 205         HDMI_HOTPLUG_CONNECTED,
 206         HDMI_HOTPLUG_EDID_DONE,
 207 };
 208
 209 struct sh_hdmi {
 210         void __iomem *base;
 211         enum hotplug_state hp_state;    /* hot-plug status */
 212         bool preprogrammed_mode;        /* use a pre-programmed VIC or the external mode */
 213         struct clk *hdmi_clk;
 214         struct device *dev;
 215         struct fb_info *info;
 216         struct mutex mutex;             /* Protect the info pointer */
 217         struct delayed_work edid_work;
 218         struct fb_var_screeninfo var;
 219         struct fb_monspecs monspec;
 220 };
 221
 222 static void hdmi_write(struct sh_hdmi *hdmi, u8 data, u8 reg)
 223 {
 224         iowrite8(data, hdmi->base + reg);
 225 }
 226
 227 static u8 hdmi_read(struct sh_hdmi *hdmi, u8 reg)
 228 {
 229         return ioread8(hdmi->base + reg);
 230 }
 231
 232 /*
 233  *      HDMI sound
 234  */
 235 static unsigned int sh_hdmi_snd_read(struct snd_soc_codec *codec,
 236                                      unsigned int reg)
 237 {
 238         struct sh_hdmi *hdmi = snd_soc_codec_get_drvdata(codec);
 239
 240         return hdmi_read(hdmi, reg);
 241 }
 242
 243 static int sh_hdmi_snd_write(struct snd_soc_codec *codec,
 244                              unsigned int reg,
 245                              unsigned int value)
 246 {
 247         struct sh_hdmi *hdmi = snd_soc_codec_get_drvdata(codec);
 248
 249         hdmi_write(hdmi, value, reg);
 250         return 0;
 251 }
 252
 253 static struct snd_soc_dai_driver sh_hdmi_dai = {
 254         .name = "sh_mobile_hdmi-hifi",
 255         .playback = {
 256                 .stream_name = "Playback",
 257                 .channels_min = 2,
 258                 .channels_max = 8,
 259                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100  |
 260                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200  |
 261                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
 262                          SNDRV_PCM_RATE_192000,
 263                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 264         },
 265 };
 266
 267 static int sh_hdmi_snd_probe(struct snd_soc_codec *codec)
 268 {
 269         dev_info(codec->dev, "SH Mobile HDMI Audio Codec");
 270
 271         return 0;
 272 }
 273
 274 static struct snd_soc_codec_driver soc_codec_dev_sh_hdmi = {
 275         .probe          = sh_hdmi_snd_probe,
 276         .read           = sh_hdmi_snd_read,
 277         .write          = sh_hdmi_snd_write,
 278 };
 279
 280 /*
 281  *      HDMI video
 282  */
 283
 284 /* External video parameter settings */
 285 static void sh_hdmi_external_video_param(struct sh_hdmi *hdmi)
 286 {
 287         struct fb_var_screeninfo *var = &hdmi->var;
 288         u16 htotal, hblank, hdelay, vtotal, vblank, vdelay, voffset;
 289         u8 sync = 0;
 290
 291         htotal = var->xres + var->right_margin + var->left_margin + var->hsync_len;
 292
 293         hdelay = var->hsync_len + var->left_margin;
 294         hblank = var->right_margin + hdelay;
 295
 296         /*
 297          * Vertical timing looks a bit different in Figure 18,
 298          * but let's try the same first by setting offset = 0
 299          */
 300         vtotal = var->yres + var->upper_margin + var->lower_margin + var->vsync_len;
 301
 302         vdelay = var->vsync_len + var->upper_margin;
 303         vblank = var->lower_margin + vdelay;
 304         voffset = min(var->upper_margin / 2, 6U);
 305
 306         /*
 307          * [3]: VSYNC polarity: Positive
 308          * [2]: HSYNC polarity: Positive
 309          * [1]: Interlace/Progressive: Progressive
 310          * [0]: External video settings enable: used.
 311          */
 312         if (var->sync & FB_SYNC_HOR_HIGH_ACT)
 313                 sync |= 4;
 314         if (var->sync & FB_SYNC_VERT_HIGH_ACT)
 315                 sync |= 8;
 316
 317         dev_dbg(hdmi->dev, "H: %u, %u, %u, %u; V: %u, %u, %u, %u; sync 0x%x\n",
 318                 htotal, hblank, hdelay, var->hsync_len,
 319                 vtotal, vblank, vdelay, var->vsync_len, sync);
 320
 321         hdmi_write(hdmi, sync | (voffset << 4), HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS);
 322
 323         hdmi_write(hdmi, htotal, HDMI_EXTERNAL_H_TOTAL_7_0);
 324         hdmi_write(hdmi, htotal >> 8, HDMI_EXTERNAL_H_TOTAL_11_8);
 325
 326         hdmi_write(hdmi, hblank, HDMI_EXTERNAL_H_BLANK_7_0);
 327         hdmi_write(hdmi, hblank >> 8, HDMI_EXTERNAL_H_BLANK_9_8);
 328
 329         hdmi_write(hdmi, hdelay, HDMI_EXTERNAL_H_DELAY_7_0);
 330         hdmi_write(hdmi, hdelay >> 8, HDMI_EXTERNAL_H_DELAY_9_8);
 331
 332         hdmi_write(hdmi, var->hsync_len, HDMI_EXTERNAL_H_DURATION_7_0);
 333         hdmi_write(hdmi, var->hsync_len >> 8, HDMI_EXTERNAL_H_DURATION_9_8);
 334
 335         hdmi_write(hdmi, vtotal, HDMI_EXTERNAL_V_TOTAL_7_0);
 336         hdmi_write(hdmi, vtotal >> 8, HDMI_EXTERNAL_V_TOTAL_9_8);
 337
 338         hdmi_write(hdmi, vblank, HDMI_EXTERNAL_V_BLANK);
 339
 340         hdmi_write(hdmi, vdelay, HDMI_EXTERNAL_V_DELAY);
 341
 342         hdmi_write(hdmi, var->vsync_len, HDMI_EXTERNAL_V_DURATION);
 343
 344         /* Set bit 0 of HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS here for external mode */
 345         if (!hdmi->preprogrammed_mode)
 346                 hdmi_write(hdmi, sync | 1 | (voffset << 4),
 347                            HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS);
 348 }
 349
 350 /**
 351  * sh_hdmi_video_config()
 352  */
 353 static void sh_hdmi_video_config(struct sh_hdmi *hdmi)
 354 {
 355         /*
 356          * [7:4]: Audio sampling frequency: 48kHz
 357          * [3:1]: Input video format: RGB and YCbCr 4:4:4 (Y on Green)
 358          * [0]: Internal/External DE select: internal
 359          */
 360         hdmi_write(hdmi, 0x20, HDMI_AUDIO_VIDEO_SETTING_1);
 361
 362         /*
 363          * [7:6]: Video output format: RGB 4:4:4
 364          * [5:4]: Input video data width: 8 bit
 365          * [3:1]: EAV/SAV location: channel 1
 366          * [0]: Video input color space: RGB
 367          */
 368         hdmi_write(hdmi, 0x34, HDMI_VIDEO_SETTING_1);
 369
 370         /*
 371          * [7:6]: Together with bit [6] of HDMI_AUDIO_VIDEO_SETTING_2, which is
 372          * left at 0 by default, this configures 24bpp and sets the Color Depth
 373          * (CD) field in the General Control Packet
 374          */
 375         hdmi_write(hdmi, 0x20, HDMI_DEEP_COLOR_MODES);
 376 }
 377
 378 /**
 379  * sh_hdmi_audio_config()
 380  */
 381 static void sh_hdmi_audio_config(struct sh_hdmi *hdmi)
 382 {
 383         u8 data;
 384         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
 385
 386         /*
 387          * [7:4] L/R data swap control
 388          * [3:0] appropriate N[19:16]
 389          */
 390         hdmi_write(hdmi, 0x00, HDMI_L_R_DATA_SWAP_CTRL_RPKT);
 391         /* appropriate N[15:8] */
 392         hdmi_write(hdmi, 0x18, HDMI_20_BIT_N_FOR_AUDIO_RPKT_15_8);
 393         /* appropriate N[7:0] */
 394         hdmi_write(hdmi, 0x00, HDMI_20_BIT_N_FOR_AUDIO_RPKT_7_0);
 395
 396         /* [7:4] 48 kHz SPDIF not used */
 397         hdmi_write(hdmi, 0x20, HDMI_SPDIF_AUDIO_SAMP_FREQ_CTS);
 398
 399         /*
 400          * [6:5] set required down sampling rate if required
 401          * [4:3] set required audio source
 402          */
 403         switch (pdata->flags & HDMI_SND_SRC_MASK) {
 404         default:
 405                 /* fall through */
 406         case HDMI_SND_SRC_I2S:
 407                 data = 0x0 << 3;
 408                 break;
 409         case HDMI_SND_SRC_SPDIF:
 410                 data = 0x1 << 3;
 411                 break;
 412         case HDMI_SND_SRC_DSD:
 413                 data = 0x2 << 3;
 414                 break;
 415         case HDMI_SND_SRC_HBR:
 416                 data = 0x3 << 3;
 417                 break;
 418         }
 419         hdmi_write(hdmi, data, HDMI_AUDIO_SETTING_1);
 420
 421         /* [3:0] set sending channel number for channel status */
 422         hdmi_write(hdmi, 0x40, HDMI_AUDIO_SETTING_2);
 423
 424         /*
 425          * [5:2] set valid I2S source input pin
 426          * [1:0] set input I2S source mode
 427          */
 428         hdmi_write(hdmi, 0x04, HDMI_I2S_AUDIO_SET);
 429
 430         /* [7:4] set valid DSD source input pin */
 431         hdmi_write(hdmi, 0x00, HDMI_DSD_AUDIO_SET);
 432
 433         /* [7:0] set appropriate I2S input pin swap settings if required */
 434         hdmi_write(hdmi, 0x00, HDMI_I2S_INPUT_PIN_SWAP);
 435
 436         /*
 437          * [7] set validity bit for channel status
 438          * [3:0] set original sample frequency for channel status
 439          */
 440         hdmi_write(hdmi, 0x00, HDMI_AUDIO_STATUS_BITS_SETTING_1);
 441
 442         /*
 443          * [7] set value for channel status
 444          * [6] set value for channel status
 445          * [5] set copyright bit for channel status
 446          * [4:2] set additional information for channel status
 447          * [1:0] set clock accuracy for channel status
 448          */
 449         hdmi_write(hdmi, 0x00, HDMI_AUDIO_STATUS_BITS_SETTING_2);
 450
 451         /* [7:0] set category code for channel status */
 452         hdmi_write(hdmi, 0x00, HDMI_CATEGORY_CODE);
 453
 454         /*
 455          * [7:4] set source number for channel status
 456          * [3:0] set word length for channel status
 457          */
 458         hdmi_write(hdmi, 0x00, HDMI_SOURCE_NUM_AUDIO_WORD_LEN);
 459
 460         /* [7:4] set sample frequency for channel status */
 461         hdmi_write(hdmi, 0x20, HDMI_AUDIO_VIDEO_SETTING_1);
 462 }
 463
 464 /**
 465  * sh_hdmi_phy_config() - configure the HDMI PHY for the used video mode
 466  */
 467 static void sh_hdmi_phy_config(struct sh_hdmi *hdmi)
 468 {
 469         if (hdmi->var.yres > 480) {
 470                 /* 720p, 8bit, 74.25MHz. Might need to be adjusted for other formats */
 471                 /*
 472                  * [1:0]        Speed_A
 473                  * [3:2]        Speed_B
 474                  * [4]          PLLA_Bypass
 475                  * [6]          DRV_TEST_EN
 476                  * [7]          DRV_TEST_IN
 477                  */
 478                 hdmi_write(hdmi, 0x0f, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
 479                 /* PLLB_CONFIG[17], PLLA_CONFIG[17] - not in PHY datasheet */
 480                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
 481                 /*
 482                  * [2:0]        BGR_I_OFFSET
 483                  * [6:4]        BGR_V_OFFSET
 484                  */
 485                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
 486                 /* PLLA_CONFIG[7:0]: VCO gain, VCO offset, LPF resistance[0] */
 487                 hdmi_write(hdmi, 0x44, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
 488                 /*
 489                  * PLLA_CONFIG[15:8]: regulator voltage[0], CP current,
 490                  * LPF capacitance, LPF resistance[1]
 491                  */
 492                 hdmi_write(hdmi, 0x32, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
 493                 /* PLLB_CONFIG[7:0]: LPF resistance[0], VCO offset, VCO gain */
 494                 hdmi_write(hdmi, 0x4A, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
 495                 /*
 496                  * PLLB_CONFIG[15:8]: regulator voltage[0], CP current,
 497                  * LPF capacitance, LPF resistance[1]
 498                  */
 499                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
 500                 /* DRV_CONFIG, PE_CONFIG */
 501                 hdmi_write(hdmi, 0x25, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
 502                 /*
 503                  * [2:0]        AMON_SEL (4 == LPF voltage)
 504                  * [4]          PLLA_CONFIG[16]
 505                  * [5]          PLLB_CONFIG[16]
 506                  */
 507                 hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
 508         } else {
 509                 /* for 480p8bit 27MHz */
 510                 hdmi_write(hdmi, 0x19, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
 511                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
 512                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
 513                 hdmi_write(hdmi, 0x44, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
 514                 hdmi_write(hdmi, 0x32, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
 515                 hdmi_write(hdmi, 0x48, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
 516                 hdmi_write(hdmi, 0x0F, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
 517                 hdmi_write(hdmi, 0x20, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
 518                 hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
 519         }
 520 }
 521
 522 /**
 523  * sh_hdmi_avi_infoframe_setup() - Auxiliary Video Information InfoFrame CONTROL PACKET
 524  */
 525 static void sh_hdmi_avi_infoframe_setup(struct sh_hdmi *hdmi)
 526 {
 527         u8 vic;
 528
 529         /* AVI InfoFrame */
 530         hdmi_write(hdmi, 0x06, HDMI_CTRL_PKT_BUF_INDEX);
 531
 532         /* Packet Type = 0x82 */
 533         hdmi_write(hdmi, 0x82, HDMI_CTRL_PKT_BUF_ACCESS_HB0);
 534
 535         /* Version = 0x02 */
 536         hdmi_write(hdmi, 0x02, HDMI_CTRL_PKT_BUF_ACCESS_HB1);
 537
 538         /* Length = 13 (0x0D) */
 539         hdmi_write(hdmi, 0x0D, HDMI_CTRL_PKT_BUF_ACCESS_HB2);
 540
 541         /* N. A. Checksum */
 542         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB0);
 543
 544         /*
 545          * Y = RGB
 546          * A0 = No Data
 547          * B = Bar Data not valid
 548          * S = No Data
 549          */
 550         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB1);
 551
 552         /*
 553          * [7:6] C = Colorimetry: no data
 554          * [5:4] M = 2: 16:9, 1: 4:3 Picture Aspect Ratio
 555          * [3:0] R = 8: Active Frame Aspect Ratio: same as picture aspect ratio
 556          */
 557         hdmi_write(hdmi, 0x28, HDMI_CTRL_PKT_BUF_ACCESS_PB2);
 558
 559         /*
 560          * ITC = No Data
 561          * EC = xvYCC601
 562          * Q = Default (depends on video format)
 563          * SC = No Known non_uniform Scaling
 564          */
 565         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB3);
 566
 567         /*
 568          * VIC = 1280 x 720p: ignored if external config is used
 569          * Send 2 for 720 x 480p, 16 for 1080p, ignored in external mode
 570          */
 571         if (hdmi->var.yres == 1080 && hdmi->var.xres == 1920)
 572                 vic = 16;
 573         else if (hdmi->var.yres == 480 && hdmi->var.xres == 720)
 574                 vic = 2;
 575         else
 576                 vic = 4;
 577         hdmi_write(hdmi, vic, HDMI_CTRL_PKT_BUF_ACCESS_PB4);
 578
 579         /* PR = No Repetition */
 580         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB5);
 581
 582         /* Line Number of End of Top Bar (lower 8 bits) */
 583         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB6);
 584
 585         /* Line Number of End of Top Bar (upper 8 bits) */
 586         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB7);
 587
 588         /* Line Number of Start of Bottom Bar (lower 8 bits) */
 589         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB8);
 590
 591         /* Line Number of Start of Bottom Bar (upper 8 bits) */
 592         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB9);
 593
 594         /* Pixel Number of End of Left Bar (lower 8 bits) */
 595         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB10);
 596
 597         /* Pixel Number of End of Left Bar (upper 8 bits) */
 598         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB11);
 599
 600         /* Pixel Number of Start of Right Bar (lower 8 bits) */
 601         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB12);
 602
 603         /* Pixel Number of Start of Right Bar (upper 8 bits) */
 604         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB13);
 605 }
 606
 607 /**
 608  * sh_hdmi_audio_infoframe_setup() - Audio InfoFrame of CONTROL PACKET
 609  */
 610 static void sh_hdmi_audio_infoframe_setup(struct sh_hdmi *hdmi)
 611 {
 612         /* Audio InfoFrame */
 613         hdmi_write(hdmi, 0x08, HDMI_CTRL_PKT_BUF_INDEX);
 614
 615         /* Packet Type = 0x84 */
 616         hdmi_write(hdmi, 0x84, HDMI_CTRL_PKT_BUF_ACCESS_HB0);
 617
 618         /* Version Number = 0x01 */
 619         hdmi_write(hdmi, 0x01, HDMI_CTRL_PKT_BUF_ACCESS_HB1);
 620
 621         /* 0 Length = 10 (0x0A) */
 622         hdmi_write(hdmi, 0x0A, HDMI_CTRL_PKT_BUF_ACCESS_HB2);
 623
 624         /* n. a. Checksum */
 625         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB0);
 626
 627         /* Audio Channel Count = Refer to Stream Header */
 628         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB1);
 629
 630         /* Refer to Stream Header */
 631         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB2);
 632
 633         /* Format depends on coding type (i.e. CT0...CT3) */
 634         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB3);
 635
 636         /* Speaker Channel Allocation = Front Right + Front Left */
 637         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB4);
 638
 639         /* Level Shift Value = 0 dB, Down - mix is permitted or no information */
 640         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB5);
 641
 642         /* Reserved (0) */
 643         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB6);
 644         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB7);
 645         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB8);
 646         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB9);
 647         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB10);
 648 }
 649
 650 /**
 651  * sh_hdmi_configure() - Initialise HDMI for output
 652  */
 653 static void sh_hdmi_configure(struct sh_hdmi *hdmi)
 654 {
 655         /* Configure video format */
 656         sh_hdmi_video_config(hdmi);
 657
 658         /* Configure audio format */
 659         sh_hdmi_audio_config(hdmi);
 660
 661         /* Configure PHY */
 662         sh_hdmi_phy_config(hdmi);
 663
 664         /* Auxiliary Video Information (AVI) InfoFrame */
 665         sh_hdmi_avi_infoframe_setup(hdmi);
 666
 667         /* Audio InfoFrame */
 668         sh_hdmi_audio_infoframe_setup(hdmi);
 669
 670         /*
 671          * Control packet auto send with VSYNC control: auto send
 672          * General control, Gamut metadata, ISRC, and ACP packets
 673          */
 674         hdmi_write(hdmi, 0x8E, HDMI_CTRL_PKT_AUTO_SEND);
 675
 676         /* FIXME */
 677         msleep(10);
 678
 679         /* PS mode b->d, reset PLLA and PLLB */
 680         hdmi_write(hdmi, 0x4C, HDMI_SYSTEM_CTRL);
 681
 682         udelay(10);
 683
 684         hdmi_write(hdmi, 0x40, HDMI_SYSTEM_CTRL);
 685 }
 686
 687 static unsigned long sh_hdmi_rate_error(struct sh_hdmi *hdmi,
 688                                         const struct fb_videomode *mode)
 689 {
 690         long target = PICOS2KHZ(mode->pixclock) * 1000,
 691                 rate = clk_round_rate(hdmi->hdmi_clk, target);
 692         unsigned long rate_error = rate > 0 ? abs(rate - target) : ULONG_MAX;
 693
 694         dev_dbg(hdmi->dev, "%u-%u-%u-%u x %u-%u-%u-%u\n",
 695                 mode->left_margin, mode->xres,
 696                 mode->right_margin, mode->hsync_len,
 697                 mode->upper_margin, mode->yres,
 698                 mode->lower_margin, mode->vsync_len);
 699
 700         dev_dbg(hdmi->dev, "\t@%lu(+/-%lu)Hz, e=%lu / 1000, r=%uHz\n", target,
 701                  rate_error, rate_error ? 10000 / (10 * target / rate_error) : 0,
 702                  mode->refresh);
 703
 704         return rate_error;
 705 }
 706
 707 static int sh_hdmi_read_edid(struct sh_hdmi *hdmi)
 708 {
 709         struct fb_var_screeninfo tmpvar;
 710         struct fb_var_screeninfo *var = &tmpvar;
 711         const struct fb_videomode *mode, *found = NULL;
 712         struct fb_info *info = hdmi->info;
 713         struct fb_modelist *modelist = NULL;
 714         unsigned int f_width = 0, f_height = 0, f_refresh = 0;
 715         unsigned long found_rate_error = ULONG_MAX; /* silly compiler... */
 716         bool exact_match = false;
 717         u8 edid[128];
 718         char *forced;
 719         int i;
 720
 721         /* Read EDID */
 722         dev_dbg(hdmi->dev, "Read back EDID code:");
 723         for (i = 0; i < 128; i++) {
 724                 edid[i] = hdmi_read(hdmi, HDMI_EDID_KSV_FIFO_ACCESS_WINDOW);
 725 #ifdef DEBUG
 726                 if ((i % 16) == 0) {
 727                         printk(KERN_CONT "\n");
 728                         printk(KERN_DEBUG "%02X | %02X", i, edid[i]);
 729                 } else {
 730                         printk(KERN_CONT " %02X", edid[i]);
 731                 }
 732 #endif
 733         }
 734 #ifdef DEBUG
 735         printk(KERN_CONT "\n");
 736 #endif
 737
 738         fb_edid_to_monspecs(edid, &hdmi->monspec);
 739
 740         fb_get_options("sh_mobile_lcdc", &forced);
 741         if (forced && *forced) {
 742                 /* Only primitive parsing so far */
 743                 i = sscanf(forced, "%ux%u@%u",
 744                            &f_width, &f_height, &f_refresh);
 745                 if (i < 2) {
 746                         f_width = 0;
 747                         f_height = 0;
 748                 }
 749                 dev_dbg(hdmi->dev, "Forced mode %ux%u@%uHz\n",
 750                         f_width, f_height, f_refresh);
 751         }
 752
 753         /* Walk monitor modes to find the best or the exact match */
 754         for (i = 0, mode = hdmi->monspec.modedb;
 755              f_width && f_height && i < hdmi->monspec.modedb_len && !exact_match;
 756              i++, mode++) {
 757                 unsigned long rate_error = sh_hdmi_rate_error(hdmi, mode);
 758
 759                 /* No interest in unmatching modes */
 760                 if (f_width != mode->xres || f_height != mode->yres)
 761                         continue;
 762                 if (f_refresh == mode->refresh || (!f_refresh && !rate_error))
 763                         /*
 764                          * Exact match if either the refresh rate matches or it
 765                          * hasn't been specified and we've found a mode, for
 766                          * which we can configure the clock precisely
 767                          */
 768                         exact_match = true;
 769                 else if (found && found_rate_error <= rate_error)
 770                         /*
 771                          * We otherwise search for the closest matching clock
 772                          * rate - either if no refresh rate has been specified
 773                          * or we cannot find an exactly matching one
 774                          */
 775                         continue;
 776
 777                 /* Check if supported: sufficient fb memory, supported clock-rate */
 778                 fb_videomode_to_var(var, mode);
 779
 780                 if (info && info->fbops->fb_check_var &&
 781                     info->fbops->fb_check_var(var, info)) {
 782                         exact_match = false;
 783                         continue;
 784                 }
 785
 786                 found = mode;
 787                 found_rate_error = rate_error;
 788         }
 789
 790         /*
 791          * TODO 1: if no ->info is present, postpone running the config until
 792          * after ->info first gets registered.
 793          * TODO 2: consider registering the HDMI platform device from the LCDC
 794          * driver, and passing ->info with HDMI platform data.
 795          */
 796         if (info && !found) {
 797                 modelist = hdmi->info->modelist.next &&
 798                         !list_empty(&hdmi->info->modelist) ?
 799                         list_entry(hdmi->info->modelist.next,
 800                                    struct fb_modelist, list) :
 801                         NULL;
 802
 803                 if (modelist) {
 804                         found = &modelist->mode;
 805                         found_rate_error = sh_hdmi_rate_error(hdmi, found);
 806                 }
 807         }
 808
 809         /* No cookie today */
 810         if (!found)
 811                 return -ENXIO;
 812
 813         dev_info(hdmi->dev, "Using %s mode %ux%u@%uHz (%luHz), clock error %luHz\n",
 814                  modelist ? "default" : "EDID", found->xres, found->yres,
 815                  found->refresh, PICOS2KHZ(found->pixclock) * 1000, found_rate_error);
 816
 817         if ((found->xres == 720 && found->yres == 480) ||
 818             (found->xres == 1280 && found->yres == 720) ||
 819             (found->xres == 1920 && found->yres == 1080))
 820                 hdmi->preprogrammed_mode = true;
 821         else
 822                 hdmi->preprogrammed_mode = false;
 823
 824         fb_videomode_to_var(&hdmi->var, found);
 825         sh_hdmi_external_video_param(hdmi);
 826
 827         return 0;
 828 }
 829
 830 static irqreturn_t sh_hdmi_hotplug(int irq, void *dev_id)
 831 {
 832         struct sh_hdmi *hdmi = dev_id;
 833         u8 status1, status2, mask1, mask2;
 834
 835         /* mode_b and PLLA and PLLB reset */
 836         hdmi_write(hdmi, 0x2C, HDMI_SYSTEM_CTRL);
 837
 838         /* How long shall reset be held? */
 839         udelay(10);
 840
 841         /* mode_b and PLLA and PLLB reset release */
 842         hdmi_write(hdmi, 0x20, HDMI_SYSTEM_CTRL);
 843
 844         status1 = hdmi_read(hdmi, HDMI_INTERRUPT_STATUS_1);
 845         status2 = hdmi_read(hdmi, HDMI_INTERRUPT_STATUS_2);
 846
 847         mask1 = hdmi_read(hdmi, HDMI_INTERRUPT_MASK_1);
 848         mask2 = hdmi_read(hdmi, HDMI_INTERRUPT_MASK_2);
 849
 850         /* Correct would be to ack only set bits, but the datasheet requires 0xff */
 851         hdmi_write(hdmi, 0xFF, HDMI_INTERRUPT_STATUS_1);
 852         hdmi_write(hdmi, 0xFF, HDMI_INTERRUPT_STATUS_2);
 853
 854         if (printk_ratelimit())
 855                 dev_dbg(hdmi->dev, "IRQ #%d: Status #1: 0x%x & 0x%x, #2: 0x%x & 0x%x\n",
 856                         irq, status1, mask1, status2, mask2);
 857
 858         if (!((status1 & mask1) | (status2 & mask2))) {
 859                 return IRQ_NONE;
 860         } else if (status1 & 0xc0) {
 861                 u8 msens;
 862
 863                 /* Datasheet specifies 10ms... */
 864                 udelay(500);
 865
 866                 msens = hdmi_read(hdmi, HDMI_HOT_PLUG_MSENS_STATUS);
 867                 dev_dbg(hdmi->dev, "MSENS 0x%x\n", msens);
 868                 /* Check, if hot plug & MSENS pin status are both high */
 869                 if ((msens & 0xC0) == 0xC0) {
 870                         /* Display plug in */
 871                         hdmi->hp_state = HDMI_HOTPLUG_CONNECTED;
 872
 873                         /* Set EDID word address  */
 874                         hdmi_write(hdmi, 0x00, HDMI_EDID_WORD_ADDRESS);
 875                         /* Set EDID segment pointer */
 876                         hdmi_write(hdmi, 0x00, HDMI_EDID_SEGMENT_POINTER);
 877                         /* Enable EDID interrupt */
 878                         hdmi_write(hdmi, 0xC6, HDMI_INTERRUPT_MASK_1);
 879                 } else if (!(status1 & 0x80)) {
 880                         /* Display unplug, beware multiple interrupts */
 881                         if (hdmi->hp_state != HDMI_HOTPLUG_DISCONNECTED)
 882                                 schedule_delayed_work(&hdmi->edid_work, 0);
 883
 884                         hdmi->hp_state = HDMI_HOTPLUG_DISCONNECTED;
 885                         /* display_off will switch back to mode_a */
 886                 }
 887         } else if (status1 & 2) {
 888                 /* EDID error interrupt: retry */
 889                 /* Set EDID word address  */
 890                 hdmi_write(hdmi, 0x00, HDMI_EDID_WORD_ADDRESS);
 891                 /* Set EDID segment pointer */
 892                 hdmi_write(hdmi, 0x00, HDMI_EDID_SEGMENT_POINTER);
 893         } else if (status1 & 4) {
 894                 /* Disable EDID interrupt */
 895                 hdmi_write(hdmi, 0xC0, HDMI_INTERRUPT_MASK_1);
 896                 hdmi->hp_state = HDMI_HOTPLUG_EDID_DONE;
 897                 schedule_delayed_work(&hdmi->edid_work, msecs_to_jiffies(10));
 898         }
 899
 900         return IRQ_HANDLED;
 901 }
 902
 903 /* locking:     called with info->lock held, or before register_framebuffer() */
 904 static void sh_hdmi_display_on(void *arg, struct fb_info *info)
 905 {
 906         /*
 907          * info is guaranteed to be valid, when we are called, because our
 908          * FB_EVENT_FB_UNBIND notify is also called with info->lock held
 909          */
 910         struct sh_hdmi *hdmi = arg;
 911         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
 912         struct sh_mobile_lcdc_chan *ch = info->par;
 913
 914         dev_dbg(hdmi->dev, "%s(%p): state %x\n", __func__,
 915                 pdata->lcd_dev, info->state);
 916
 917         /* No need to lock */
 918         hdmi->info = info;
 919
 920         /*
 921          * hp_state can be set to
 922          * HDMI_HOTPLUG_DISCONNECTED:   on monitor unplug
 923          * HDMI_HOTPLUG_CONNECTED:      on monitor plug-in
 924          * HDMI_HOTPLUG_EDID_DONE:      on EDID read completion
 925          */
 926         switch (hdmi->hp_state) {
 927         case HDMI_HOTPLUG_EDID_DONE:
 928                 /* PS mode d->e. All functions are active */
 929                 hdmi_write(hdmi, 0x80, HDMI_SYSTEM_CTRL);
 930                 dev_dbg(hdmi->dev, "HDMI running\n");
 931                 break;
 932         case HDMI_HOTPLUG_DISCONNECTED:
 933                 info->state = FBINFO_STATE_SUSPENDED;
 934         default:
 935                 hdmi->var = ch->display_var;
 936         }
 937 }
 938
 939 /* locking: called with info->lock held */
 940 static void sh_hdmi_display_off(void *arg)
 941 {
 942         struct sh_hdmi *hdmi = arg;
 943         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
 944
 945         dev_dbg(hdmi->dev, "%s(%p)\n", __func__, pdata->lcd_dev);
 946         /* PS mode e->a */
 947         hdmi_write(hdmi, 0x10, HDMI_SYSTEM_CTRL);
 948 }
 949
 950 static bool sh_hdmi_must_reconfigure(struct sh_hdmi *hdmi)
 951 {
 952         struct fb_info *info = hdmi->info;
 953         struct sh_mobile_lcdc_chan *ch = info->par;
 954         struct fb_var_screeninfo *new_var = &hdmi->var, *old_var = &ch->display_var;
 955         struct fb_videomode mode1, mode2;
 956
 957         fb_var_to_videomode(&mode1, old_var);
 958         fb_var_to_videomode(&mode2, new_var);
 959
 960         dev_dbg(info->dev, "Old %ux%u, new %ux%u\n",
 961                 mode1.xres, mode1.yres, mode2.xres, mode2.yres);
 962
 963         if (fb_mode_is_equal(&mode1, &mode2))
 964                 return false;
 965
 966         dev_dbg(info->dev, "Switching %u -> %u lines\n",
 967                 mode1.yres, mode2.yres);
 968         *old_var = *new_var;
 969
 970         return true;
 971 }
 972
 973 /**
 974  * sh_hdmi_clk_configure() - set HDMI clock frequency and enable the clock
 975  * @hdmi:       driver context
 976  * @pixclock:   pixel clock period in picoseconds
 977  * return:      configured positive rate if successful
 978  *              0 if couldn't set the rate, but managed to enable the clock
 979  *              negative error, if couldn't enable the clock
 980  */
 981 static long sh_hdmi_clk_configure(struct sh_hdmi *hdmi, unsigned long pixclock)
 982 {
 983         long rate;
 984         int ret;
 985
 986         rate = PICOS2KHZ(pixclock) * 1000;
 987         rate = clk_round_rate(hdmi->hdmi_clk, rate);
 988         if (rate > 0) {
 989                 ret = clk_set_rate(hdmi->hdmi_clk, rate);
 990                 if (ret < 0) {
 991                         dev_warn(hdmi->dev, "Cannot set rate %ld: %d\n", rate, ret);
 992                         rate = 0;
 993                 } else {
 994                         dev_dbg(hdmi->dev, "HDMI set frequency %lu\n", rate);
 995                 }
 996         } else {
 997                 rate = 0;
 998                 dev_warn(hdmi->dev, "Cannot get suitable rate: %ld\n", rate);
 999         }
1000
1001         ret = clk_enable(hdmi->hdmi_clk);
1002         if (ret < 0) {
1003                 dev_err(hdmi->dev, "Cannot enable clock: %d\n", ret);
1004                 return ret;
1005         }
1006
1007         return rate;
1008 }
1009
1010 /* Hotplug interrupt occurred, read EDID */
1011 static void sh_hdmi_edid_work_fn(struct work_struct *work)
1012 {
1013         struct sh_hdmi *hdmi = container_of(work, struct sh_hdmi, edid_work.work);
1014         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
1015         struct sh_mobile_lcdc_chan *ch;
1016         int ret;
1017
1018         dev_dbg(hdmi->dev, "%s(%p): begin, hotplug status %d\n", __func__,
1019                 pdata->lcd_dev, hdmi->hp_state);
1020
1021         if (!pdata->lcd_dev)
1022                 return;
1023
1024         mutex_lock(&hdmi->mutex);
1025
1026         if (hdmi->hp_state == HDMI_HOTPLUG_EDID_DONE) {
1027                 /* A device has been plugged in */
1028                 pm_runtime_get_sync(hdmi->dev);
1029
1030                 ret = sh_hdmi_read_edid(hdmi);
1031                 if (ret < 0)
1032                         goto out;
1033
1034                 /* Reconfigure the clock */
1035                 clk_disable(hdmi->hdmi_clk);
1036                 ret = sh_hdmi_clk_configure(hdmi, hdmi->var.pixclock);
1037                 if (ret < 0)
1038                         goto out;
1039
1040                 msleep(10);
1041                 sh_hdmi_configure(hdmi);
1042                 /* Switched to another (d) power-save mode */
1043                 msleep(10);
1044
1045                 if (!hdmi->info)
1046                         goto out;
1047
1048                 ch = hdmi->info->par;
1049
1050                 acquire_console_sem();
1051
1052                 /* HDMI plug in */
1053                 if (!sh_hdmi_must_reconfigure(hdmi) &&
1054                     hdmi->info->state == FBINFO_STATE_RUNNING) {
1055                         /*
1056                          * First activation with the default monitor - just turn
1057                          * on, if we run a resume here, the logo disappears
1058                          */
1059                         if (lock_fb_info(hdmi->info)) {
1060                                 sh_hdmi_display_on(hdmi, hdmi->info);
1061                                 unlock_fb_info(hdmi->info);
1062                         }
1063                 } else {
1064                         /* New monitor or have to wake up */
1065                         fb_set_suspend(hdmi->info, 0);
1066                 }
1067
1068                 release_console_sem();
1069         } else {
1070                 ret = 0;
1071                 if (!hdmi->info)
1072                         goto out;
1073
1074                 acquire_console_sem();
1075
1076                 /* HDMI disconnect */
1077                 fb_set_suspend(hdmi->info, 1);
1078
1079                 release_console_sem();
1080                 pm_runtime_put(hdmi->dev);
1081                 fb_destroy_modedb(hdmi->monspec.modedb);
1082         }
1083
1084 out:
1085         if (ret < 0)
1086                 hdmi->hp_state = HDMI_HOTPLUG_DISCONNECTED;
1087         mutex_unlock(&hdmi->mutex);
1088
1089         dev_dbg(hdmi->dev, "%s(%p): end\n", __func__, pdata->lcd_dev);
1090 }
1091
1092 static int sh_hdmi_notify(struct notifier_block *nb,
1093                           unsigned long action, void *data);
1094
1095 static struct notifier_block sh_hdmi_notifier = {
1096         .notifier_call = sh_hdmi_notify,
1097 };
1098
1099 static int sh_hdmi_notify(struct notifier_block *nb,
1100                           unsigned long action, void *data)
1101 {
1102         struct fb_event *event = data;
1103         struct fb_info *info = event->info;
1104         struct sh_mobile_lcdc_chan *ch = info->par;
1105         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1106         struct sh_hdmi *hdmi = board_cfg->board_data;
1107
1108         if (nb != &sh_hdmi_notifier || !hdmi || hdmi->info != info)
1109                 return NOTIFY_DONE;
1110
1111         switch(action) {
1112         case FB_EVENT_FB_REGISTERED:
1113                 /* Unneeded, activation taken care by sh_hdmi_display_on() */
1114                 break;
1115         case FB_EVENT_FB_UNREGISTERED:
1116                 /*
1117                  * We are called from unregister_framebuffer() with the
1118                  * info->lock held. This is bad for us, because we can race with
1119                  * the scheduled work, which has to call fb_set_suspend(), which
1120                  * takes info->lock internally, so, sh_hdmi_edid_work_fn()
1121                  * cannot take and hold info->lock for the whole function
1122                  * duration. Using an additional lock creates a classical AB-BA
1123                  * lock up. Therefore, we have to release the info->lock
1124                  * temporarily, synchronise with the work queue and re-acquire
1125                  * the info->lock.
1126                  */
1127                 unlock_fb_info(hdmi->info);
1128                 mutex_lock(&hdmi->mutex);
1129                 hdmi->info = NULL;
1130                 mutex_unlock(&hdmi->mutex);
1131                 lock_fb_info(hdmi->info);
1132                 return NOTIFY_OK;
1133         }
1134         return NOTIFY_DONE;
1135 }
1136
1137 static int __init sh_hdmi_probe(struct platform_device *pdev)
1138 {
1139         struct sh_mobile_hdmi_info *pdata = pdev->dev.platform_data;
1140         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1141         struct sh_mobile_lcdc_board_cfg *board_cfg;
1142         int irq = platform_get_irq(pdev, 0), ret;
1143         struct sh_hdmi *hdmi;
1144         long rate;
1145
1146         if (!res || !pdata || irq < 0)
1147                 return -ENODEV;
1148
1149         hdmi = kzalloc(sizeof(*hdmi), GFP_KERNEL);
1150         if (!hdmi) {
1151                 dev_err(&pdev->dev, "Cannot allocate device data\n");
1152                 return -ENOMEM;
1153         }
1154
1155         mutex_init(&hdmi->mutex);
1156
1157         hdmi->dev = &pdev->dev;
1158
1159         hdmi->hdmi_clk = clk_get(&pdev->dev, "ick");
1160         if (IS_ERR(hdmi->hdmi_clk)) {
1161                 ret = PTR_ERR(hdmi->hdmi_clk);
1162                 dev_err(&pdev->dev, "Unable to get clock: %d\n", ret);
1163                 goto egetclk;
1164         }
1165
1166         /* Some arbitrary relaxed pixclock just to get things started */
1167         rate = sh_hdmi_clk_configure(hdmi, 37037);
1168         if (rate < 0) {
1169                 ret = rate;
1170                 goto erate;
1171         }
1172
1173         dev_dbg(&pdev->dev, "Enabled HDMI clock at %luHz\n", rate);
1174
1175         if (!request_mem_region(res->start, resource_size(res), dev_name(&pdev->dev))) {
1176                 dev_err(&pdev->dev, "HDMI register region already claimed\n");
1177                 ret = -EBUSY;
1178                 goto ereqreg;
1179         }
1180
1181         hdmi->base = ioremap(res->start, resource_size(res));
1182         if (!hdmi->base) {
1183                 dev_err(&pdev->dev, "HDMI register region already claimed\n");
1184                 ret = -ENOMEM;
1185                 goto emap;
1186         }
1187
1188         platform_set_drvdata(pdev, hdmi);
1189
1190         /* Product and revision IDs are 0 in sh-mobile version */
1191         dev_info(&pdev->dev, "Detected HDMI controller 0x%x:0x%x\n",
1192                  hdmi_read(hdmi, HDMI_PRODUCT_ID), hdmi_read(hdmi, HDMI_REVISION_ID));
1193
1194         /* Set up LCDC callbacks */
1195         board_cfg = &pdata->lcd_chan->board_cfg;
1196         board_cfg->owner = THIS_MODULE;
1197         board_cfg->board_data = hdmi;
1198         board_cfg->display_on = sh_hdmi_display_on;
1199         board_cfg->display_off = sh_hdmi_display_off;
1200
1201         INIT_DELAYED_WORK(&hdmi->edid_work, sh_hdmi_edid_work_fn);
1202
1203         pm_runtime_enable(&pdev->dev);
1204         pm_runtime_resume(&pdev->dev);
1205
1206         ret = request_irq(irq, sh_hdmi_hotplug, 0,
1207                           dev_name(&pdev->dev), hdmi);
1208         if (ret < 0) {
1209                 dev_err(&pdev->dev, "Unable to request irq: %d\n", ret);
1210                 goto ereqirq;
1211         }
1212
1213         ret = snd_soc_register_codec(&pdev->dev,
1214                         &soc_codec_dev_sh_hdmi, &sh_hdmi_dai, 1);
1215         if (ret < 0) {
1216                 dev_err(&pdev->dev, "codec registration failed\n");
1217                 goto ecodec;
1218         }
1219
1220         return 0;
1221
1222 ecodec:
1223         free_irq(irq, hdmi);
1224 ereqirq:
1225         pm_runtime_disable(&pdev->dev);
1226         iounmap(hdmi->base);
1227 emap:
1228         release_mem_region(res->start, resource_size(res));
1229 ereqreg:
1230         clk_disable(hdmi->hdmi_clk);
1231 erate:
1232         clk_put(hdmi->hdmi_clk);
1233 egetclk:
1234         mutex_destroy(&hdmi->mutex);
1235         kfree(hdmi);
1236
1237         return ret;
1238 }
1239
1240 static int __exit sh_hdmi_remove(struct platform_device *pdev)
1241 {
1242         struct sh_mobile_hdmi_info *pdata = pdev->dev.platform_data;
1243         struct sh_hdmi *hdmi = platform_get_drvdata(pdev);
1244         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1245         struct sh_mobile_lcdc_board_cfg *board_cfg = &pdata->lcd_chan->board_cfg;
1246         int irq = platform_get_irq(pdev, 0);
1247
1248         snd_soc_unregister_codec(&pdev->dev);
1249
1250         board_cfg->display_on = NULL;
1251         board_cfg->display_off = NULL;
1252         board_cfg->board_data = NULL;
1253         board_cfg->owner = NULL;
1254
1255         /* No new work will be scheduled, wait for running ISR */
1256         free_irq(irq, hdmi);
1257         /* Wait for already scheduled work */
1258         cancel_delayed_work_sync(&hdmi->edid_work);
1259         pm_runtime_disable(&pdev->dev);
1260         clk_disable(hdmi->hdmi_clk);
1261         clk_put(hdmi->hdmi_clk);
1262         iounmap(hdmi->base);
1263         release_mem_region(res->start, resource_size(res));
1264         mutex_destroy(&hdmi->mutex);
1265         kfree(hdmi);
1266
1267         return 0;
1268 }
1269
1270 static struct platform_driver sh_hdmi_driver = {
1271         .remove         = __exit_p(sh_hdmi_remove),
1272         .driver = {
1273                 .name   = "sh-mobile-hdmi",
1274         },
1275 };
1276
1277 static int __init sh_hdmi_init(void)
1278 {
1279         return platform_driver_probe(&sh_hdmi_driver, sh_hdmi_probe);
1280 }
1281 module_init(sh_hdmi_init);
1282
1283 static void __exit sh_hdmi_exit(void)
1284 {
1285         platform_driver_unregister(&sh_hdmi_driver);
1286 }
1287 module_exit(sh_hdmi_exit);
1288
1289 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1290 MODULE_DESCRIPTION("SuperH / ARM-shmobile HDMI driver");
1291 MODULE_LICENSE("GPL v2");