drivers/gpu/drm/sti/sti_hda.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
   4  * License terms:  GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/seq_file.h>
  12
  13 #include <drm/drmP.h>
  14 #include <drm/drm_atomic_helper.h>
  15 #include <drm/drm_crtc_helper.h>
  16
  17 /* HDformatter registers */
  18 #define HDA_ANA_CFG                     0x0000
  19 #define HDA_ANA_SCALE_CTRL_Y            0x0004
  20 #define HDA_ANA_SCALE_CTRL_CB           0x0008
  21 #define HDA_ANA_SCALE_CTRL_CR           0x000C
  22 #define HDA_ANA_ANC_CTRL                0x0010
  23 #define HDA_ANA_SRC_Y_CFG               0x0014
  24 #define HDA_COEFF_Y_PH1_TAP123          0x0018
  25 #define HDA_COEFF_Y_PH1_TAP456          0x001C
  26 #define HDA_COEFF_Y_PH2_TAP123          0x0020
  27 #define HDA_COEFF_Y_PH2_TAP456          0x0024
  28 #define HDA_COEFF_Y_PH3_TAP123          0x0028
  29 #define HDA_COEFF_Y_PH3_TAP456          0x002C
  30 #define HDA_COEFF_Y_PH4_TAP123          0x0030
  31 #define HDA_COEFF_Y_PH4_TAP456          0x0034
  32 #define HDA_ANA_SRC_C_CFG               0x0040
  33 #define HDA_COEFF_C_PH1_TAP123          0x0044
  34 #define HDA_COEFF_C_PH1_TAP456          0x0048
  35 #define HDA_COEFF_C_PH2_TAP123          0x004C
  36 #define HDA_COEFF_C_PH2_TAP456          0x0050
  37 #define HDA_COEFF_C_PH3_TAP123          0x0054
  38 #define HDA_COEFF_C_PH3_TAP456          0x0058
  39 #define HDA_COEFF_C_PH4_TAP123          0x005C
  40 #define HDA_COEFF_C_PH4_TAP456          0x0060
  41 #define HDA_SYNC_AWGI                   0x0300
  42
  43 /* HDA_ANA_CFG */
  44 #define CFG_AWG_ASYNC_EN                BIT(0)
  45 #define CFG_AWG_ASYNC_HSYNC_MTD         BIT(1)
  46 #define CFG_AWG_ASYNC_VSYNC_MTD         BIT(2)
  47 #define CFG_AWG_SYNC_DEL                BIT(3)
  48 #define CFG_AWG_FLTR_MODE_SHIFT         4
  49 #define CFG_AWG_FLTR_MODE_MASK          (0xF << CFG_AWG_FLTR_MODE_SHIFT)
  50 #define CFG_AWG_FLTR_MODE_SD            (0 << CFG_AWG_FLTR_MODE_SHIFT)
  51 #define CFG_AWG_FLTR_MODE_ED            (1 << CFG_AWG_FLTR_MODE_SHIFT)
  52 #define CFG_AWG_FLTR_MODE_HD            (2 << CFG_AWG_FLTR_MODE_SHIFT)
  53 #define CFG_SYNC_ON_PBPR_MASK           BIT(8)
  54 #define CFG_PREFILTER_EN_MASK           BIT(9)
  55 #define CFG_PBPR_SYNC_OFF_SHIFT         16
  56 #define CFG_PBPR_SYNC_OFF_MASK          (0x7FF << CFG_PBPR_SYNC_OFF_SHIFT)
  57 #define CFG_PBPR_SYNC_OFF_VAL           0x117 /* Voltage dependent. stiH416 */
  58
  59 /* Default scaling values */
  60 #define SCALE_CTRL_Y_DFLT               0x00C50256
  61 #define SCALE_CTRL_CB_DFLT              0x00DB0249
  62 #define SCALE_CTRL_CR_DFLT              0x00DB0249
  63
  64 /* Video DACs control */
  65 #define DAC_CFG_HD_HZUVW_OFF_MASK       BIT(1)
  66
  67 /* Upsampler values for the alternative 2X Filter */
  68 #define SAMPLER_COEF_NB                 8
  69 #define HDA_ANA_SRC_Y_CFG_ALT_2X        0x01130000
  70 static u32 coef_y_alt_2x[] = {
  71         0x00FE83FB, 0x1F900401, 0x00000000, 0x00000000,
  72         0x00F408F9, 0x055F7C25, 0x00000000, 0x00000000
  73 };
  74
  75 #define HDA_ANA_SRC_C_CFG_ALT_2X        0x01750004
  76 static u32 coef_c_alt_2x[] = {
  77         0x001305F7, 0x05274BD0, 0x00000000, 0x00000000,
  78         0x0004907C, 0x09C80B9D, 0x00000000, 0x00000000
  79 };
  80
  81 /* Upsampler values for the 4X Filter */
  82 #define HDA_ANA_SRC_Y_CFG_4X            0x01ED0005
  83 #define HDA_ANA_SRC_C_CFG_4X            0x01ED0004
  84 static u32 coef_yc_4x[] = {
  85         0x00FC827F, 0x008FE20B, 0x00F684FC, 0x050F7C24,
  86         0x00F4857C, 0x0A1F402E, 0x00FA027F, 0x0E076E1D
  87 };
  88
  89 /* AWG instructions for some video modes */
  90 #define AWG_MAX_INST                    64
  91
  92 /* 720p@50 */
  93 static u32 AWGi_720p_50[] = {
  94         0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA,
  95         0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B,
  96         0x00000D8E, 0x00000104, 0x00001804, 0x00000971,
  97         0x00000C26, 0x0000003B, 0x00000FB4, 0x00000FB5,
  98         0x00000104, 0x00001AE8
  99 };
 100
 101 #define NN_720p_50 ARRAY_SIZE(AWGi_720p_50)
 102
 103 /* 720p@60 */
 104 static u32 AWGi_720p_60[] = {
 105         0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA,
 106         0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B,
 107         0x00000C44, 0x00000104, 0x00001804, 0x00000971,
 108         0x00000C26, 0x0000003B, 0x00000F0F, 0x00000F10,
 109         0x00000104, 0x00001AE8
 110 };
 111
 112 #define NN_720p_60 ARRAY_SIZE(AWGi_720p_60)
 113
 114 /* 1080p@30 */
 115 static u32 AWGi_1080p_30[] = {
 116         0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
 117         0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
 118         0x00000C2A, 0x00000104, 0x00001804, 0x00000971,
 119         0x00000C2A, 0x0000003B, 0x00000EBE, 0x00000EBF,
 120         0x00000EBF, 0x00000104, 0x00001A2F, 0x00001C4B,
 121         0x00001C52
 122 };
 123
 124 #define NN_1080p_30 ARRAY_SIZE(AWGi_1080p_30)
 125
 126 /* 1080p@25 */
 127 static u32 AWGi_1080p_25[] = {
 128         0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
 129         0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
 130         0x00000DE2, 0x00000104, 0x00001804, 0x00000971,
 131         0x00000C2A, 0x0000003B, 0x00000F51, 0x00000F51,
 132         0x00000F52, 0x00000104, 0x00001A2F, 0x00001C4B,
 133         0x00001C52
 134 };
 135
 136 #define NN_1080p_25 ARRAY_SIZE(AWGi_1080p_25)
 137
 138 /* 1080p@24 */
 139 static u32 AWGi_1080p_24[] = {
 140         0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
 141         0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
 142         0x00000E50, 0x00000104, 0x00001804, 0x00000971,
 143         0x00000C2A, 0x0000003B, 0x00000F76, 0x00000F76,
 144         0x00000F76, 0x00000104, 0x00001A2F, 0x00001C4B,
 145         0x00001C52
 146 };
 147
 148 #define NN_1080p_24 ARRAY_SIZE(AWGi_1080p_24)
 149
 150 /* 720x480p@60 */
 151 static u32 AWGi_720x480p_60[] = {
 152         0x00000904, 0x00000F18, 0x0000013B, 0x00001805,
 153         0x00000904, 0x00000C3D, 0x0000003B, 0x00001A06
 154 };
 155
 156 #define NN_720x480p_60 ARRAY_SIZE(AWGi_720x480p_60)
 157
 158 /* Video mode category */
 159 enum sti_hda_vid_cat {
 160         VID_SD,
 161         VID_ED,
 162         VID_HD_74M,
 163         VID_HD_148M
 164 };
 165
 166 struct sti_hda_video_config {
 167         struct drm_display_mode mode;
 168         u32 *awg_instr;
 169         int nb_instr;
 170         enum sti_hda_vid_cat vid_cat;
 171 };
 172
 173 /* HD analog supported modes
 174  * Interlaced modes may be added when supported by the whole display chain
 175  */
 176 static const struct sti_hda_video_config hda_supported_modes[] = {
 177         /* 1080p30 74.250Mhz */
 178         {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2008,
 179                    2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
 180                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 181          AWGi_1080p_30, NN_1080p_30, VID_HD_74M},
 182         /* 1080p30 74.176Mhz */
 183         {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2008,
 184                    2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
 185                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 186          AWGi_1080p_30, NN_1080p_30, VID_HD_74M},
 187         /* 1080p24 74.250Mhz */
 188         {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2558,
 189                    2602, 2750, 0, 1080, 1084, 1089, 1125, 0,
 190                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 191          AWGi_1080p_24, NN_1080p_24, VID_HD_74M},
 192         /* 1080p24 74.176Mhz */
 193         {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2558,
 194                    2602, 2750, 0, 1080, 1084, 1089, 1125, 0,
 195                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 196          AWGi_1080p_24, NN_1080p_24, VID_HD_74M},
 197         /* 1080p25 74.250Mhz */
 198         {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2448,
 199                    2492, 2640, 0, 1080, 1084, 1089, 1125, 0,
 200                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 201          AWGi_1080p_25, NN_1080p_25, VID_HD_74M},
 202         /* 720p60 74.250Mhz */
 203         {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1390,
 204                    1430, 1650, 0, 720, 725, 730, 750, 0,
 205                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 206          AWGi_720p_60, NN_720p_60, VID_HD_74M},
 207         /* 720p60 74.176Mhz */
 208         {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74176, 1280, 1390,
 209                    1430, 1650, 0, 720, 725, 730, 750, 0,
 210                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 211          AWGi_720p_60, NN_720p_60, VID_HD_74M},
 212         /* 720p50 74.250Mhz */
 213         {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1720,
 214                    1760, 1980, 0, 720, 725, 730, 750, 0,
 215                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
 216          AWGi_720p_50, NN_720p_50, VID_HD_74M},
 217         /* 720x480p60 27.027Mhz */
 218         {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27027, 720, 736,
 219                    798, 858, 0, 480, 489, 495, 525, 0,
 220                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)},
 221          AWGi_720x480p_60, NN_720x480p_60, VID_ED},
 222         /* 720x480p60 27.000Mhz */
 223         {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27000, 720, 736,
 224                    798, 858, 0, 480, 489, 495, 525, 0,
 225                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)},
 226          AWGi_720x480p_60, NN_720x480p_60, VID_ED}
 227 };
 228
 229 /**
 230  * STI hd analog structure
 231  *
 232  * @dev: driver device
 233  * @drm_dev: pointer to drm device
 234  * @mode: current display mode selected
 235  * @regs: HD analog register
 236  * @video_dacs_ctrl: video DACS control register
 237  * @enabled: true if HD analog is enabled else false
 238  */
 239 struct sti_hda {
 240         struct device dev;
 241         struct drm_device *drm_dev;
 242         struct drm_display_mode mode;
 243         void __iomem *regs;
 244         void __iomem *video_dacs_ctrl;
 245         struct clk *clk_pix;
 246         struct clk *clk_hddac;
 247         bool enabled;
 248 };
 249
 250 struct sti_hda_connector {
 251         struct drm_connector drm_connector;
 252         struct drm_encoder *encoder;
 253         struct sti_hda *hda;
 254 };
 255
 256 #define to_sti_hda_connector(x) \
 257         container_of(x, struct sti_hda_connector, drm_connector)
 258
 259 static u32 hda_read(struct sti_hda *hda, int offset)
 260 {
 261         return readl(hda->regs + offset);
 262 }
 263
 264 static void hda_write(struct sti_hda *hda, u32 val, int offset)
 265 {
 266         writel(val, hda->regs + offset);
 267 }
 268
 269 /**
 270  * Search for a video mode in the supported modes table
 271  *
 272  * @mode: mode being searched
 273  * @idx: index of the found mode
 274  *
 275  * Return true if mode is found
 276  */
 277 static bool hda_get_mode_idx(struct drm_display_mode mode, int *idx)
 278 {
 279         unsigned int i;
 280
 281         for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++)
 282                 if (drm_mode_equal(&hda_supported_modes[i].mode, &mode)) {
 283                         *idx = i;
 284                         return true;
 285                 }
 286         return false;
 287 }
 288
 289 /**
 290  * Enable the HD DACS
 291  *
 292  * @hda: pointer to HD analog structure
 293  * @enable: true if HD DACS need to be enabled, else false
 294  */
 295 static void hda_enable_hd_dacs(struct sti_hda *hda, bool enable)
 296 {
 297         if (hda->video_dacs_ctrl) {
 298                 u32 val;
 299
 300                 val = readl(hda->video_dacs_ctrl);
 301                 if (enable)
 302                         val &= ~DAC_CFG_HD_HZUVW_OFF_MASK;
 303                 else
 304                         val |= DAC_CFG_HD_HZUVW_OFF_MASK;
 305
 306                 writel(val, hda->video_dacs_ctrl);
 307         }
 308 }
 309
 310 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
 311                                    readl(hda->regs + reg))
 312
 313 static void hda_dbg_cfg(struct seq_file *s, int val)
 314 {
 315         seq_puts(s, "\tAWG ");
 316         seq_puts(s, val & CFG_AWG_ASYNC_EN ? "enabled" : "disabled");
 317 }
 318
 319 static void hda_dbg_awg_microcode(struct seq_file *s, void __iomem *reg)
 320 {
 321         unsigned int i;
 322
 323         seq_puts(s, "\n\n  HDA AWG microcode:");
 324         for (i = 0; i < AWG_MAX_INST; i++) {
 325                 if (i % 8 == 0)
 326                         seq_printf(s, "\n  %04X:", i);
 327                 seq_printf(s, " %04X", readl(reg + i * 4));
 328         }
 329 }
 330
 331 static void hda_dbg_video_dacs_ctrl(struct seq_file *s, void __iomem *reg)
 332 {
 333         u32 val = readl(reg);
 334
 335         seq_printf(s, "\n\n  %-25s 0x%08X", "VIDEO_DACS_CONTROL", val);
 336         seq_puts(s, "\tHD DACs ");
 337         seq_puts(s, val & DAC_CFG_HD_HZUVW_OFF_MASK ? "disabled" : "enabled");
 338 }
 339
 340 static int hda_dbg_show(struct seq_file *s, void *data)
 341 {
 342         struct drm_info_node *node = s->private;
 343         struct sti_hda *hda = (struct sti_hda *)node->info_ent->data;
 344
 345         seq_printf(s, "HD Analog: (vaddr = 0x%p)", hda->regs);
 346         DBGFS_DUMP(HDA_ANA_CFG);
 347         hda_dbg_cfg(s, readl(hda->regs + HDA_ANA_CFG));
 348         DBGFS_DUMP(HDA_ANA_SCALE_CTRL_Y);
 349         DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CB);
 350         DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CR);
 351         DBGFS_DUMP(HDA_ANA_ANC_CTRL);
 352         DBGFS_DUMP(HDA_ANA_SRC_Y_CFG);
 353         DBGFS_DUMP(HDA_ANA_SRC_C_CFG);
 354         hda_dbg_awg_microcode(s, hda->regs + HDA_SYNC_AWGI);
 355         if (hda->video_dacs_ctrl)
 356                 hda_dbg_video_dacs_ctrl(s, hda->video_dacs_ctrl);
 357         seq_putc(s, '\n');
 358         return 0;
 359 }
 360
 361 static struct drm_info_list hda_debugfs_files[] = {
 362         { "hda", hda_dbg_show, 0, NULL },
 363 };
 364
 365 static int hda_debugfs_init(struct sti_hda *hda, struct drm_minor *minor)
 366 {
 367         unsigned int i;
 368
 369         for (i = 0; i < ARRAY_SIZE(hda_debugfs_files); i++)
 370                 hda_debugfs_files[i].data = hda;
 371
 372         return drm_debugfs_create_files(hda_debugfs_files,
 373                                         ARRAY_SIZE(hda_debugfs_files),
 374                                         minor->debugfs_root, minor);
 375 }
 376
 377 /**
 378  * Configure AWG, writing instructions
 379  *
 380  * @hda: pointer to HD analog structure
 381  * @awg_instr: pointer to AWG instructions table
 382  * @nb: nb of AWG instructions
 383  */
 384 static void sti_hda_configure_awg(struct sti_hda *hda, u32 *awg_instr, int nb)
 385 {
 386         unsigned int i;
 387
 388         DRM_DEBUG_DRIVER("\n");
 389
 390         for (i = 0; i < nb; i++)
 391                 hda_write(hda, awg_instr[i], HDA_SYNC_AWGI + i * 4);
 392         for (i = nb; i < AWG_MAX_INST; i++)
 393                 hda_write(hda, 0, HDA_SYNC_AWGI + i * 4);
 394 }
 395
 396 static void sti_hda_disable(struct drm_bridge *bridge)
 397 {
 398         struct sti_hda *hda = bridge->driver_private;
 399         u32 val;
 400
 401         if (!hda->enabled)
 402                 return;
 403
 404         DRM_DEBUG_DRIVER("\n");
 405
 406         /* Disable HD DAC and AWG */
 407         val = hda_read(hda, HDA_ANA_CFG);
 408         val &= ~CFG_AWG_ASYNC_EN;
 409         hda_write(hda, val, HDA_ANA_CFG);
 410         hda_write(hda, 0, HDA_ANA_ANC_CTRL);
 411
 412         hda_enable_hd_dacs(hda, false);
 413
 414         /* Disable/unprepare hda clock */
 415         clk_disable_unprepare(hda->clk_hddac);
 416         clk_disable_unprepare(hda->clk_pix);
 417
 418         hda->enabled = false;
 419 }
 420
 421 static void sti_hda_pre_enable(struct drm_bridge *bridge)
 422 {
 423         struct sti_hda *hda = bridge->driver_private;
 424         u32 val, i, mode_idx;
 425         u32 src_filter_y, src_filter_c;
 426         u32 *coef_y, *coef_c;
 427         u32 filter_mode;
 428
 429         DRM_DEBUG_DRIVER("\n");
 430
 431         if (hda->enabled)
 432                 return;
 433
 434         /* Prepare/enable clocks */
 435         if (clk_prepare_enable(hda->clk_pix))
 436                 DRM_ERROR("Failed to prepare/enable hda_pix clk\n");
 437         if (clk_prepare_enable(hda->clk_hddac))
 438                 DRM_ERROR("Failed to prepare/enable hda_hddac clk\n");
 439
 440         if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
 441                 DRM_ERROR("Undefined mode\n");
 442                 return;
 443         }
 444
 445         switch (hda_supported_modes[mode_idx].vid_cat) {
 446         case VID_HD_148M:
 447                 DRM_ERROR("Beyond HD analog capabilities\n");
 448                 return;
 449         case VID_HD_74M:
 450                 /* HD use alternate 2x filter */
 451                 filter_mode = CFG_AWG_FLTR_MODE_HD;
 452                 src_filter_y = HDA_ANA_SRC_Y_CFG_ALT_2X;
 453                 src_filter_c = HDA_ANA_SRC_C_CFG_ALT_2X;
 454                 coef_y = coef_y_alt_2x;
 455                 coef_c = coef_c_alt_2x;
 456                 break;
 457         case VID_ED:
 458                 /* ED uses 4x filter */
 459                 filter_mode = CFG_AWG_FLTR_MODE_ED;
 460                 src_filter_y = HDA_ANA_SRC_Y_CFG_4X;
 461                 src_filter_c = HDA_ANA_SRC_C_CFG_4X;
 462                 coef_y = coef_yc_4x;
 463                 coef_c = coef_yc_4x;
 464                 break;
 465         case VID_SD:
 466                 DRM_ERROR("Not supported\n");
 467                 return;
 468         default:
 469                 DRM_ERROR("Undefined resolution\n");
 470                 return;
 471         }
 472         DRM_DEBUG_DRIVER("Using HDA mode #%d\n", mode_idx);
 473
 474         /* Enable HD Video DACs */
 475         hda_enable_hd_dacs(hda, true);
 476
 477         /* Configure scaler */
 478         hda_write(hda, SCALE_CTRL_Y_DFLT, HDA_ANA_SCALE_CTRL_Y);
 479         hda_write(hda, SCALE_CTRL_CB_DFLT, HDA_ANA_SCALE_CTRL_CB);
 480         hda_write(hda, SCALE_CTRL_CR_DFLT, HDA_ANA_SCALE_CTRL_CR);
 481
 482         /* Configure sampler */
 483         hda_write(hda , src_filter_y, HDA_ANA_SRC_Y_CFG);
 484         hda_write(hda, src_filter_c,  HDA_ANA_SRC_C_CFG);
 485         for (i = 0; i < SAMPLER_COEF_NB; i++) {
 486                 hda_write(hda, coef_y[i], HDA_COEFF_Y_PH1_TAP123 + i * 4);
 487                 hda_write(hda, coef_c[i], HDA_COEFF_C_PH1_TAP123 + i * 4);
 488         }
 489
 490         /* Configure main HDFormatter */
 491         val = 0;
 492         val |= (hda->mode.flags & DRM_MODE_FLAG_INTERLACE) ?
 493             0 : CFG_AWG_ASYNC_VSYNC_MTD;
 494         val |= (CFG_PBPR_SYNC_OFF_VAL << CFG_PBPR_SYNC_OFF_SHIFT);
 495         val |= filter_mode;
 496         hda_write(hda, val, HDA_ANA_CFG);
 497
 498         /* Configure AWG */
 499         sti_hda_configure_awg(hda, hda_supported_modes[mode_idx].awg_instr,
 500                               hda_supported_modes[mode_idx].nb_instr);
 501
 502         /* Enable AWG */
 503         val = hda_read(hda, HDA_ANA_CFG);
 504         val |= CFG_AWG_ASYNC_EN;
 505         hda_write(hda, val, HDA_ANA_CFG);
 506
 507         hda->enabled = true;
 508 }
 509
 510 static void sti_hda_set_mode(struct drm_bridge *bridge,
 511                 struct drm_display_mode *mode,
 512                 struct drm_display_mode *adjusted_mode)
 513 {
 514         struct sti_hda *hda = bridge->driver_private;
 515         u32 mode_idx;
 516         int hddac_rate;
 517         int ret;
 518
 519         DRM_DEBUG_DRIVER("\n");
 520
 521         memcpy(&hda->mode, mode, sizeof(struct drm_display_mode));
 522
 523         if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
 524                 DRM_ERROR("Undefined mode\n");
 525                 return;
 526         }
 527
 528         switch (hda_supported_modes[mode_idx].vid_cat) {
 529         case VID_HD_74M:
 530                 /* HD use alternate 2x filter */
 531                 hddac_rate = mode->clock * 1000 * 2;
 532                 break;
 533         case VID_ED:
 534                 /* ED uses 4x filter */
 535                 hddac_rate = mode->clock * 1000 * 4;
 536                 break;
 537         default:
 538                 DRM_ERROR("Undefined mode\n");
 539                 return;
 540         }
 541
 542         /* HD DAC = 148.5Mhz or 108 Mhz */
 543         ret = clk_set_rate(hda->clk_hddac, hddac_rate);
 544         if (ret < 0)
 545                 DRM_ERROR("Cannot set rate (%dHz) for hda_hddac clk\n",
 546                           hddac_rate);
 547
 548         /* HDformatter clock = compositor clock */
 549         ret = clk_set_rate(hda->clk_pix, mode->clock * 1000);
 550         if (ret < 0)
 551                 DRM_ERROR("Cannot set rate (%dHz) for hda_pix clk\n",
 552                           mode->clock * 1000);
 553 }
 554
 555 static void sti_hda_bridge_nope(struct drm_bridge *bridge)
 556 {
 557         /* do nothing */
 558 }
 559
 560 static const struct drm_bridge_funcs sti_hda_bridge_funcs = {
 561         .pre_enable = sti_hda_pre_enable,
 562         .enable = sti_hda_bridge_nope,
 563         .disable = sti_hda_disable,
 564         .post_disable = sti_hda_bridge_nope,
 565         .mode_set = sti_hda_set_mode,
 566 };
 567
 568 static int sti_hda_connector_get_modes(struct drm_connector *connector)
 569 {
 570         unsigned int i;
 571         int count = 0;
 572         struct sti_hda_connector *hda_connector
 573                 = to_sti_hda_connector(connector);
 574         struct sti_hda *hda = hda_connector->hda;
 575
 576         DRM_DEBUG_DRIVER("\n");
 577
 578         for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++) {
 579                 struct drm_display_mode *mode =
 580                         drm_mode_duplicate(hda->drm_dev,
 581                                         &hda_supported_modes[i].mode);
 582                 if (!mode)
 583                         continue;
 584                 mode->vrefresh = drm_mode_vrefresh(mode);
 585
 586                 /* the first mode is the preferred mode */
 587                 if (i == 0)
 588                         mode->type |= DRM_MODE_TYPE_PREFERRED;
 589
 590                 drm_mode_probed_add(connector, mode);
 591                 count++;
 592         }
 593
 594         return count;
 595 }
 596
 597 #define CLK_TOLERANCE_HZ 50
 598
 599 static int sti_hda_connector_mode_valid(struct drm_connector *connector,
 600                                         struct drm_display_mode *mode)
 601 {
 602         int target = mode->clock * 1000;
 603         int target_min = target - CLK_TOLERANCE_HZ;
 604         int target_max = target + CLK_TOLERANCE_HZ;
 605         int result;
 606         int idx;
 607         struct sti_hda_connector *hda_connector
 608                 = to_sti_hda_connector(connector);
 609         struct sti_hda *hda = hda_connector->hda;
 610
 611         if (!hda_get_mode_idx(*mode, &idx)) {
 612                 return MODE_BAD;
 613         } else {
 614                 result = clk_round_rate(hda->clk_pix, target);
 615
 616                 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
 617                                  target, result);
 618
 619                 if ((result < target_min) || (result > target_max)) {
 620                         DRM_DEBUG_DRIVER("hda pixclk=%d not supported\n",
 621                                          target);
 622                         return MODE_BAD;
 623                 }
 624         }
 625
 626         return MODE_OK;
 627 }
 628
 629 static const
 630 struct drm_connector_helper_funcs sti_hda_connector_helper_funcs = {
 631         .get_modes = sti_hda_connector_get_modes,
 632         .mode_valid = sti_hda_connector_mode_valid,
 633 };
 634
 635 static int sti_hda_late_register(struct drm_connector *connector)
 636 {
 637         struct sti_hda_connector *hda_connector
 638                 = to_sti_hda_connector(connector);
 639         struct sti_hda *hda = hda_connector->hda;
 640
 641         if (hda_debugfs_init(hda, hda->drm_dev->primary)) {
 642                 DRM_ERROR("HDA debugfs setup failed\n");
 643                 return -EINVAL;
 644         }
 645
 646         return 0;
 647 }
 648
 649 static const struct drm_connector_funcs sti_hda_connector_funcs = {
 650         .fill_modes = drm_helper_probe_single_connector_modes,
 651         .destroy = drm_connector_cleanup,
 652         .reset = drm_atomic_helper_connector_reset,
 653         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 654         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 655         .late_register = sti_hda_late_register,
 656 };
 657
 658 static struct drm_encoder *sti_hda_find_encoder(struct drm_device *dev)
 659 {
 660         struct drm_encoder *encoder;
 661
 662         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 663                 if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
 664                         return encoder;
 665         }
 666
 667         return NULL;
 668 }
 669
 670 static int sti_hda_bind(struct device *dev, struct device *master, void *data)
 671 {
 672         struct sti_hda *hda = dev_get_drvdata(dev);
 673         struct drm_device *drm_dev = data;
 674         struct drm_encoder *encoder;
 675         struct sti_hda_connector *connector;
 676         struct drm_connector *drm_connector;
 677         struct drm_bridge *bridge;
 678         int err;
 679
 680         /* Set the drm device handle */
 681         hda->drm_dev = drm_dev;
 682
 683         encoder = sti_hda_find_encoder(drm_dev);
 684         if (!encoder)
 685                 return -ENOMEM;
 686
 687         connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
 688         if (!connector)
 689                 return -ENOMEM;
 690
 691         connector->hda = hda;
 692
 693                 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
 694         if (!bridge)
 695                 return -ENOMEM;
 696
 697         bridge->driver_private = hda;
 698         bridge->funcs = &sti_hda_bridge_funcs;
 699         drm_bridge_attach(encoder, bridge, NULL);
 700
 701         connector->encoder = encoder;
 702
 703         drm_connector = (struct drm_connector *)connector;
 704
 705         drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
 706
 707         drm_connector_init(drm_dev, drm_connector,
 708                         &sti_hda_connector_funcs, DRM_MODE_CONNECTOR_Component);
 709         drm_connector_helper_add(drm_connector,
 710                         &sti_hda_connector_helper_funcs);
 711
 712         err = drm_mode_connector_attach_encoder(drm_connector, encoder);
 713         if (err) {
 714                 DRM_ERROR("Failed to attach a connector to a encoder\n");
 715                 goto err_sysfs;
 716         }
 717
 718         /* force to disable hd dacs at startup */
 719         hda_enable_hd_dacs(hda, false);
 720
 721         return 0;
 722
 723 err_sysfs:
 724         return -EINVAL;
 725 }
 726
 727 static void sti_hda_unbind(struct device *dev,
 728                 struct device *master, void *data)
 729 {
 730 }
 731
 732 static const struct component_ops sti_hda_ops = {
 733         .bind = sti_hda_bind,
 734         .unbind = sti_hda_unbind,
 735 };
 736
 737 static int sti_hda_probe(struct platform_device *pdev)
 738 {
 739         struct device *dev = &pdev->dev;
 740         struct sti_hda *hda;
 741         struct resource *res;
 742
 743         DRM_INFO("%s\n", __func__);
 744
 745         hda = devm_kzalloc(dev, sizeof(*hda), GFP_KERNEL);
 746         if (!hda)
 747                 return -ENOMEM;
 748
 749         hda->dev = pdev->dev;
 750
 751         /* Get resources */
 752         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hda-reg");
 753         if (!res) {
 754                 DRM_ERROR("Invalid hda resource\n");
 755                 return -ENOMEM;
 756         }
 757         hda->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
 758         if (!hda->regs)
 759                 return -ENOMEM;
 760
 761         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 762                         "video-dacs-ctrl");
 763         if (res) {
 764                 hda->video_dacs_ctrl = devm_ioremap_nocache(dev, res->start,
 765                                 resource_size(res));
 766                 if (!hda->video_dacs_ctrl)
 767                         return -ENOMEM;
 768         } else {
 769                 /* If no existing video-dacs-ctrl resource continue the probe */
 770                 DRM_DEBUG_DRIVER("No video-dacs-ctrl resource\n");
 771                 hda->video_dacs_ctrl = NULL;
 772         }
 773
 774         /* Get clock resources */
 775         hda->clk_pix = devm_clk_get(dev, "pix");
 776         if (IS_ERR(hda->clk_pix)) {
 777                 DRM_ERROR("Cannot get hda_pix clock\n");
 778                 return PTR_ERR(hda->clk_pix);
 779         }
 780
 781         hda->clk_hddac = devm_clk_get(dev, "hddac");
 782         if (IS_ERR(hda->clk_hddac)) {
 783                 DRM_ERROR("Cannot get hda_hddac clock\n");
 784                 return PTR_ERR(hda->clk_hddac);
 785         }
 786
 787         platform_set_drvdata(pdev, hda);
 788
 789         return component_add(&pdev->dev, &sti_hda_ops);
 790 }
 791
 792 static int sti_hda_remove(struct platform_device *pdev)
 793 {
 794         component_del(&pdev->dev, &sti_hda_ops);
 795         return 0;
 796 }
 797
 798 static const struct of_device_id hda_of_match[] = {
 799         { .compatible = "st,stih416-hda", },
 800         { .compatible = "st,stih407-hda", },
 801         { /* end node */ }
 802 };
 803 MODULE_DEVICE_TABLE(of, hda_of_match);
 804
 805 struct platform_driver sti_hda_driver = {
 806         .driver = {
 807                 .name = "sti-hda",
 808                 .owner = THIS_MODULE,
 809                 .of_match_table = hda_of_match,
 810         },
 811         .probe = sti_hda_probe,
 812         .remove = sti_hda_remove,
 813 };
 814
 815 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 816 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 817 MODULE_LICENSE("GPL");