drivers/gpu/drm/meson/meson_vclk.c

   1 /*
   2  * Copyright (C) 2016 BayLibre, SAS
   3  * Author: Neil Armstrong <[email protected]>
   4  * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <drm/drmP.h>
  23 #include "meson_drv.h"
  24 #include "meson_vclk.h"
  25
  26 /**
  27  * DOC: Video Clocks
  28  *
  29  * VCLK is the "Pixel Clock" frequency generator from a dedicated PLL.
  30  * We handle the following encodings :
  31  *
  32  * - CVBS 27MHz generator via the VCLK2 to the VENCI and VDAC blocks
  33  * - HDMI Pixel Clocks generation
  34  *
  35  * What is missing :
  36  *
  37  * - Genenate Pixel clocks for 2K/4K 10bit formats
  38  *
  39  * Clock generator scheme :
  40  *
  41  * .. code::
  42  *
  43  *    __________   _________            _____
  44  *   |          | |         |          |     |--ENCI
  45  *   | HDMI PLL |-| PLL_DIV |--- VCLK--|     |--ENCL
  46  *   |__________| |_________| \        | MUX |--ENCP
  47  *                             --VCLK2-|     |--VDAC
  48  *                                     |_____|--HDMI-TX
  49  *
  50  * Final clocks can take input for either VCLK or VCLK2, but
  51  * VCLK is the preferred path for HDMI clocking and VCLK2 is the
  52  * preferred path for CVBS VDAC clocking.
  53  *
  54  * VCLK and VCLK2 have fixed divided clocks paths for /1, /2, /4, /6 or /12.
  55  *
  56  * The PLL_DIV can achieve an additional fractional dividing like
  57  * 1.5, 3.5, 3.75... to generate special 2K and 4K 10bit clocks.
  58  */
  59
  60 /* HHI Registers */
  61 #define HHI_VID_PLL_CLK_DIV     0x1a0 /* 0x68 offset in data sheet */
  62 #define VID_PLL_EN              BIT(19)
  63 #define VID_PLL_BYPASS          BIT(18)
  64 #define VID_PLL_PRESET          BIT(15)
  65 #define HHI_VIID_CLK_DIV        0x128 /* 0x4a offset in data sheet */
  66 #define VCLK2_DIV_MASK          0xff
  67 #define VCLK2_DIV_EN            BIT(16)
  68 #define VCLK2_DIV_RESET         BIT(17)
  69 #define CTS_VDAC_SEL_MASK       (0xf << 28)
  70 #define CTS_VDAC_SEL_SHIFT      28
  71 #define HHI_VIID_CLK_CNTL       0x12c /* 0x4b offset in data sheet */
  72 #define VCLK2_EN                BIT(19)
  73 #define VCLK2_SEL_MASK          (0x7 << 16)
  74 #define VCLK2_SEL_SHIFT         16
  75 #define VCLK2_SOFT_RESET        BIT(15)
  76 #define VCLK2_DIV1_EN           BIT(0)
  77 #define HHI_VID_CLK_DIV         0x164 /* 0x59 offset in data sheet */
  78 #define VCLK_DIV_MASK           0xff
  79 #define VCLK_DIV_EN             BIT(16)
  80 #define VCLK_DIV_RESET          BIT(17)
  81 #define CTS_ENCP_SEL_MASK       (0xf << 24)
  82 #define CTS_ENCP_SEL_SHIFT      24
  83 #define CTS_ENCI_SEL_MASK       (0xf << 28)
  84 #define CTS_ENCI_SEL_SHIFT      28
  85 #define HHI_VID_CLK_CNTL        0x17c /* 0x5f offset in data sheet */
  86 #define VCLK_EN                 BIT(19)
  87 #define VCLK_SEL_MASK           (0x7 << 16)
  88 #define VCLK_SEL_SHIFT          16
  89 #define VCLK_SOFT_RESET         BIT(15)
  90 #define VCLK_DIV1_EN            BIT(0)
  91 #define VCLK_DIV2_EN            BIT(1)
  92 #define VCLK_DIV4_EN            BIT(2)
  93 #define VCLK_DIV6_EN            BIT(3)
  94 #define VCLK_DIV12_EN           BIT(4)
  95 #define HHI_VID_CLK_CNTL2       0x194 /* 0x65 offset in data sheet */
  96 #define CTS_ENCI_EN             BIT(0)
  97 #define CTS_ENCP_EN             BIT(2)
  98 #define CTS_VDAC_EN             BIT(4)
  99 #define HDMI_TX_PIXEL_EN        BIT(5)
 100 #define HHI_HDMI_CLK_CNTL       0x1cc /* 0x73 offset in data sheet */
 101 #define HDMI_TX_PIXEL_SEL_MASK  (0xf << 16)
 102 #define HDMI_TX_PIXEL_SEL_SHIFT 16
 103 #define CTS_HDMI_SYS_SEL_MASK   (0x7 << 9)
 104 #define CTS_HDMI_SYS_DIV_MASK   (0x7f)
 105 #define CTS_HDMI_SYS_EN         BIT(8)
 106
 107 #define HHI_VDAC_CNTL0          0x2F4 /* 0xbd offset in data sheet */
 108 #define HHI_VDAC_CNTL1          0x2F8 /* 0xbe offset in data sheet */
 109
 110 #define HHI_HDMI_PLL_CNTL       0x320 /* 0xc8 offset in data sheet */
 111 #define HHI_HDMI_PLL_CNTL2      0x324 /* 0xc9 offset in data sheet */
 112 #define HHI_HDMI_PLL_CNTL3      0x328 /* 0xca offset in data sheet */
 113 #define HHI_HDMI_PLL_CNTL4      0x32C /* 0xcb offset in data sheet */
 114 #define HHI_HDMI_PLL_CNTL5      0x330 /* 0xcc offset in data sheet */
 115 #define HHI_HDMI_PLL_CNTL6      0x334 /* 0xcd offset in data sheet */
 116
 117 #define HDMI_PLL_RESET          BIT(28)
 118 #define HDMI_PLL_LOCK           BIT(31)
 119
 120 #define FREQ_1000_1001(_freq)   DIV_ROUND_CLOSEST(_freq * 1000, 1001)
 121
 122 /* VID PLL Dividers */
 123 enum {
 124         VID_PLL_DIV_1 = 0,
 125         VID_PLL_DIV_2,
 126         VID_PLL_DIV_2p5,
 127         VID_PLL_DIV_3,
 128         VID_PLL_DIV_3p5,
 129         VID_PLL_DIV_3p75,
 130         VID_PLL_DIV_4,
 131         VID_PLL_DIV_5,
 132         VID_PLL_DIV_6,
 133         VID_PLL_DIV_6p25,
 134         VID_PLL_DIV_7,
 135         VID_PLL_DIV_7p5,
 136         VID_PLL_DIV_12,
 137         VID_PLL_DIV_14,
 138         VID_PLL_DIV_15,
 139 };
 140
 141 void meson_vid_pll_set(struct meson_drm *priv, unsigned int div)
 142 {
 143         unsigned int shift_val = 0;
 144         unsigned int shift_sel = 0;
 145
 146         /* Disable vid_pll output clock */
 147         regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_EN, 0);
 148         regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV, VID_PLL_PRESET, 0);
 149
 150         switch (div) {
 151         case VID_PLL_DIV_2:
 152                 shift_val = 0x0aaa;
 153                 shift_sel = 0;
 154                 break;
 155         case VID_PLL_DIV_2p5:
 156                 shift_val = 0x5294;
 157                 shift_sel = 2;
 158                 break;
 159         case VID_PLL_DIV_3:
 160                 shift_val = 0x0db6;
 161                 shift_sel = 0;
 162                 break;
 163         case VID_PLL_DIV_3p5:
 164                 shift_val = 0x36cc;
 165                 shift_sel = 1;
 166                 break;
 167         case VID_PLL_DIV_3p75:
 168                 shift_val = 0x6666;
 169                 shift_sel = 2;
 170                 break;
 171         case VID_PLL_DIV_4:
 172                 shift_val = 0x0ccc;
 173                 shift_sel = 0;
 174                 break;
 175         case VID_PLL_DIV_5:
 176                 shift_val = 0x739c;
 177                 shift_sel = 2;
 178                 break;
 179         case VID_PLL_DIV_6:
 180                 shift_val = 0x0e38;
 181                 shift_sel = 0;
 182                 break;
 183         case VID_PLL_DIV_6p25:
 184                 shift_val = 0x0000;
 185                 shift_sel = 3;
 186                 break;
 187         case VID_PLL_DIV_7:
 188                 shift_val = 0x3c78;
 189                 shift_sel = 1;
 190                 break;
 191         case VID_PLL_DIV_7p5:
 192                 shift_val = 0x78f0;
 193                 shift_sel = 2;
 194                 break;
 195         case VID_PLL_DIV_12:
 196                 shift_val = 0x0fc0;
 197                 shift_sel = 0;
 198                 break;
 199         case VID_PLL_DIV_14:
 200                 shift_val = 0x3f80;
 201                 shift_sel = 1;
 202                 break;
 203         case VID_PLL_DIV_15:
 204                 shift_val = 0x7f80;
 205                 shift_sel = 2;
 206                 break;
 207         }
 208
 209         if (div == VID_PLL_DIV_1)
 210                 /* Enable vid_pll bypass to HDMI pll */
 211                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 212                                    VID_PLL_BYPASS, VID_PLL_BYPASS);
 213         else {
 214                 /* Disable Bypass */
 215                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 216                                    VID_PLL_BYPASS, 0);
 217                 /* Clear sel */
 218                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 219                                    3 << 16, 0);
 220                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 221                                    VID_PLL_PRESET, 0);
 222                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 223                                    0x7fff, 0);
 224
 225                 /* Setup sel and val */
 226                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 227                                    3 << 16, shift_sel << 16);
 228                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 229                                    VID_PLL_PRESET, VID_PLL_PRESET);
 230                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 231                                    0x7fff, shift_val);
 232
 233                 regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 234                                    VID_PLL_PRESET, 0);
 235         }
 236
 237         /* Enable the vid_pll output clock */
 238         regmap_update_bits(priv->hhi, HHI_VID_PLL_CLK_DIV,
 239                                 VID_PLL_EN, VID_PLL_EN);
 240 }
 241
 242 /*
 243  * Setup VCLK2 for 27MHz, and enable clocks for ENCI and VDAC
 244  *
 245  * TOFIX: Refactor into table to also handle HDMI frequency and paths
 246  */
 247 static void meson_venci_cvbs_clock_config(struct meson_drm *priv)
 248 {
 249         unsigned int val;
 250
 251         /* Setup PLL to output 1.485GHz */
 252         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) {
 253                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x5800023d);
 254                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x00404e00);
 255                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x0d5c5091);
 256                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x801da72c);
 257                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x71486980);
 258                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x00000e55);
 259                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x4800023d);
 260         } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
 261                    meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) {
 262                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x4000027b);
 263                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x800cb300);
 264                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0xa6212844);
 265                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x0c4d000c);
 266                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x001fa729);
 267                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x01a31500);
 268
 269                 /* Reset PLL */
 270                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
 271                                         HDMI_PLL_RESET, HDMI_PLL_RESET);
 272                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
 273                                         HDMI_PLL_RESET, 0);
 274         }
 275
 276         /* Poll for lock bit */
 277         regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL, val,
 278                                  (val & HDMI_PLL_LOCK), 10, 0);
 279
 280         /* Disable VCLK2 */
 281         regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, VCLK2_EN, 0);
 282
 283         /* Setup vid_pll to /1 */
 284         meson_vid_pll_set(priv, VID_PLL_DIV_1);
 285
 286         /* Setup the VCLK2 divider value to achieve 27MHz */
 287         regmap_update_bits(priv->hhi, HHI_VIID_CLK_DIV,
 288                                 VCLK2_DIV_MASK, (55 - 1));
 289
 290         /* select vid_pll for vclk2 */
 291         regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL,
 292                                 VCLK2_SEL_MASK, (4 << VCLK2_SEL_SHIFT));
 293         /* enable vclk2 gate */
 294         regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL, VCLK2_EN, VCLK2_EN);
 295
 296         /* select vclk_div1 for enci */
 297         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 298                                 CTS_ENCI_SEL_MASK, (8 << CTS_ENCI_SEL_SHIFT));
 299         /* select vclk_div1 for vdac */
 300         regmap_update_bits(priv->hhi, HHI_VIID_CLK_DIV,
 301                                 CTS_VDAC_SEL_MASK, (8 << CTS_VDAC_SEL_SHIFT));
 302
 303         /* release vclk2_div_reset and enable vclk2_div */
 304         regmap_update_bits(priv->hhi, HHI_VIID_CLK_DIV,
 305                                 VCLK2_DIV_EN | VCLK2_DIV_RESET, VCLK2_DIV_EN);
 306
 307         /* enable vclk2_div1 gate */
 308         regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL,
 309                                 VCLK2_DIV1_EN, VCLK2_DIV1_EN);
 310
 311         /* reset vclk2 */
 312         regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL,
 313                                 VCLK2_SOFT_RESET, VCLK2_SOFT_RESET);
 314         regmap_update_bits(priv->hhi, HHI_VIID_CLK_CNTL,
 315                                 VCLK2_SOFT_RESET, 0);
 316
 317         /* enable enci_clk */
 318         regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
 319                                 CTS_ENCI_EN, CTS_ENCI_EN);
 320         /* enable vdac_clk */
 321         regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
 322                                 CTS_VDAC_EN, CTS_VDAC_EN);
 323 }
 324
 325 enum {
 326 /* PLL  O1 O2 O3 VP DV     EN TX */
 327 /* 4320 /4 /4 /1 /5 /1  => /2 /2 */
 328         MESON_VCLK_HDMI_ENCI_54000 = 0,
 329 /* 4320 /4 /4 /1 /5 /1  => /1 /2 */
 330         MESON_VCLK_HDMI_DDR_54000,
 331 /* 2970 /4 /1 /1 /5 /1  => /1 /2 */
 332         MESON_VCLK_HDMI_DDR_148500,
 333 /* 2970 /2 /2 /2 /5 /1  => /1 /1 */
 334         MESON_VCLK_HDMI_74250,
 335 /* 2970 /1 /2 /2 /5 /1  => /1 /1 */
 336         MESON_VCLK_HDMI_148500,
 337 /* 2970 /1 /1 /1 /5 /2  => /1 /1 */
 338         MESON_VCLK_HDMI_297000,
 339 /* 5940 /1 /1 /2 /5 /1  => /1 /1 */
 340         MESON_VCLK_HDMI_594000
 341 };
 342
 343 struct meson_vclk_params {
 344         unsigned int pixel_freq;
 345         unsigned int pll_base_freq;
 346         unsigned int pll_od1;
 347         unsigned int pll_od2;
 348         unsigned int pll_od3;
 349         unsigned int vid_pll_div;
 350         unsigned int vclk_div;
 351 } params[] = {
 352         [MESON_VCLK_HDMI_ENCI_54000] = {
 353                 .pixel_freq = 54000,
 354                 .pll_base_freq = 4320000,
 355                 .pll_od1 = 4,
 356                 .pll_od2 = 4,
 357                 .pll_od3 = 1,
 358                 .vid_pll_div = VID_PLL_DIV_5,
 359                 .vclk_div = 1,
 360         },
 361         [MESON_VCLK_HDMI_DDR_54000] = {
 362                 .pixel_freq = 54000,
 363                 .pll_base_freq = 4320000,
 364                 .pll_od1 = 4,
 365                 .pll_od2 = 4,
 366                 .pll_od3 = 1,
 367                 .vid_pll_div = VID_PLL_DIV_5,
 368                 .vclk_div = 1,
 369         },
 370         [MESON_VCLK_HDMI_DDR_148500] = {
 371                 .pixel_freq = 148500,
 372                 .pll_base_freq = 2970000,
 373                 .pll_od1 = 4,
 374                 .pll_od2 = 1,
 375                 .pll_od3 = 1,
 376                 .vid_pll_div = VID_PLL_DIV_5,
 377                 .vclk_div = 1,
 378         },
 379         [MESON_VCLK_HDMI_74250] = {
 380                 .pixel_freq = 74250,
 381                 .pll_base_freq = 2970000,
 382                 .pll_od1 = 2,
 383                 .pll_od2 = 2,
 384                 .pll_od3 = 2,
 385                 .vid_pll_div = VID_PLL_DIV_5,
 386                 .vclk_div = 1,
 387         },
 388         [MESON_VCLK_HDMI_148500] = {
 389                 .pixel_freq = 148500,
 390                 .pll_base_freq = 2970000,
 391                 .pll_od1 = 1,
 392                 .pll_od2 = 2,
 393                 .pll_od3 = 2,
 394                 .vid_pll_div = VID_PLL_DIV_5,
 395                 .vclk_div = 1,
 396         },
 397         [MESON_VCLK_HDMI_297000] = {
 398                 .pixel_freq = 297000,
 399                 .pll_base_freq = 2970000,
 400                 .pll_od1 = 1,
 401                 .pll_od2 = 1,
 402                 .pll_od3 = 1,
 403                 .vid_pll_div = VID_PLL_DIV_5,
 404                 .vclk_div = 2,
 405         },
 406         [MESON_VCLK_HDMI_594000] = {
 407                 .pixel_freq = 594000,
 408                 .pll_base_freq = 5940000,
 409                 .pll_od1 = 1,
 410                 .pll_od2 = 1,
 411                 .pll_od3 = 2,
 412                 .vid_pll_div = VID_PLL_DIV_5,
 413                 .vclk_div = 1,
 414         },
 415         { /* sentinel */ },
 416 };
 417
 418 static inline unsigned int pll_od_to_reg(unsigned int od)
 419 {
 420         switch (od) {
 421         case 1:
 422                 return 0;
 423         case 2:
 424                 return 1;
 425         case 4:
 426                 return 2;
 427         case 8:
 428                 return 3;
 429         }
 430
 431         /* Invalid */
 432         return 0;
 433 }
 434
 435 void meson_hdmi_pll_set_params(struct meson_drm *priv, unsigned int m,
 436                                unsigned int frac, unsigned int od1,
 437                                unsigned int od2, unsigned int od3)
 438 {
 439         unsigned int val;
 440
 441         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) {
 442                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x58000200 | m);
 443                 if (frac)
 444                         regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2,
 445                                      0x00004000 | frac);
 446                 else
 447                         regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2,
 448                                      0x00000000);
 449                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x0d5c5091);
 450                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x801da72c);
 451                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x71486980);
 452                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x00000e55);
 453
 454                 /* Enable and unreset */
 455                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
 456                                    0x7 << 28, 0x4 << 28);
 457
 458                 /* Poll for lock bit */
 459                 regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL,
 460                                          val, (val & HDMI_PLL_LOCK), 10, 0);
 461         } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
 462                    meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) {
 463                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL, 0x40000200 | m);
 464                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL2, 0x800cb000 | frac);
 465                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL3, 0x860f30c4);
 466                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL4, 0x0c8e0000);
 467                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL5, 0x001fa729);
 468                 regmap_write(priv->hhi, HHI_HDMI_PLL_CNTL6, 0x01a31500);
 469
 470                 /* Reset PLL */
 471                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
 472                                 HDMI_PLL_RESET, HDMI_PLL_RESET);
 473                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL,
 474                                 HDMI_PLL_RESET, 0);
 475
 476                 /* Poll for lock bit */
 477                 regmap_read_poll_timeout(priv->hhi, HHI_HDMI_PLL_CNTL, val,
 478                                 (val & HDMI_PLL_LOCK), 10, 0);
 479         }
 480
 481         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
 482                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
 483                                 3 << 16, pll_od_to_reg(od1) << 16);
 484         else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
 485                         meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
 486                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3,
 487                                 3 << 21, pll_od_to_reg(od1) << 21);
 488
 489         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
 490                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
 491                                 3 << 22, pll_od_to_reg(od2) << 22);
 492         else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
 493                         meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
 494                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3,
 495                                 3 << 23, pll_od_to_reg(od2) << 23);
 496
 497         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
 498                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL2,
 499                                 3 << 18, pll_od_to_reg(od3) << 18);
 500         else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
 501                         meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
 502                 regmap_update_bits(priv->hhi, HHI_HDMI_PLL_CNTL3,
 503                                 3 << 19, pll_od_to_reg(od3) << 19);
 504
 505 }
 506
 507 #define XTAL_FREQ 24000
 508
 509 static unsigned int meson_hdmi_pll_get_m(struct meson_drm *priv,
 510                                          unsigned int pll_freq)
 511 {
 512         /* The GXBB PLL has a /2 pre-multiplier */
 513         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
 514                 pll_freq /= 2;
 515
 516         return pll_freq / XTAL_FREQ;
 517 }
 518
 519 #define HDMI_FRAC_MAX_GXBB      4096
 520 #define HDMI_FRAC_MAX_GXL       1024
 521
 522 static unsigned int meson_hdmi_pll_get_frac(struct meson_drm *priv,
 523                                             unsigned int m,
 524                                             unsigned int pll_freq)
 525 {
 526         unsigned int parent_freq = XTAL_FREQ;
 527         unsigned int frac_max = HDMI_FRAC_MAX_GXL;
 528         unsigned int frac_m;
 529         unsigned int frac;
 530
 531         /* The GXBB PLL has a /2 pre-multiplier and a larger FRAC width */
 532         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) {
 533                 frac_max = HDMI_FRAC_MAX_GXBB;
 534                 parent_freq *= 2;
 535         }
 536
 537         /* We can have a perfect match !*/
 538         if (pll_freq / m == parent_freq &&
 539             pll_freq % m == 0)
 540                 return 0;
 541
 542         frac = div_u64((u64)pll_freq * (u64)frac_max, parent_freq);
 543         frac_m = m * frac_max;
 544         if (frac_m > frac)
 545                 return frac_max;
 546         frac -= frac_m;
 547
 548         return min((u16)frac, (u16)(frac_max - 1));
 549 }
 550
 551 static bool meson_hdmi_pll_validate_params(struct meson_drm *priv,
 552                                            unsigned int m,
 553                                            unsigned int frac)
 554 {
 555         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) {
 556                 /* Empiric supported min/max dividers */
 557                 if (m < 53 || m > 123)
 558                         return false;
 559                 if (frac >= HDMI_FRAC_MAX_GXBB)
 560                         return false;
 561         } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
 562                    meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) {
 563                 /* Empiric supported min/max dividers */
 564                 if (m < 106 || m > 247)
 565                         return false;
 566                 if (frac >= HDMI_FRAC_MAX_GXL)
 567                         return false;
 568         }
 569
 570         return true;
 571 }
 572
 573 static bool meson_hdmi_pll_find_params(struct meson_drm *priv,
 574                                        unsigned int freq,
 575                                        unsigned int *m,
 576                                        unsigned int *frac,
 577                                        unsigned int *od)
 578 {
 579         /* Cycle from /16 to /2 */
 580         for (*od = 16 ; *od > 1 ; *od >>= 1) {
 581                 *m = meson_hdmi_pll_get_m(priv, freq * *od);
 582                 if (!*m)
 583                         continue;
 584                 *frac = meson_hdmi_pll_get_frac(priv, *m, freq * *od);
 585
 586                 DRM_DEBUG_DRIVER("PLL params for %dkHz: m=%x frac=%x od=%d\n",
 587                                  freq, *m, *frac, *od);
 588
 589                 if (meson_hdmi_pll_validate_params(priv, *m, *frac))
 590                         return true;
 591         }
 592
 593         return false;
 594 }
 595
 596 /* pll_freq is the frequency after the OD dividers */
 597 enum drm_mode_status
 598 meson_vclk_dmt_supported_freq(struct meson_drm *priv, unsigned int freq)
 599 {
 600         unsigned int od, m, frac;
 601
 602         /* In DMT mode, path after PLL is always /10 */
 603         freq *= 10;
 604
 605         if (meson_hdmi_pll_find_params(priv, freq, &m, &frac, &od))
 606                 return MODE_OK;
 607
 608         return MODE_CLOCK_RANGE;
 609 }
 610 EXPORT_SYMBOL_GPL(meson_vclk_dmt_supported_freq);
 611
 612 /* pll_freq is the frequency after the OD dividers */
 613 static void meson_hdmi_pll_generic_set(struct meson_drm *priv,
 614                                        unsigned int pll_freq)
 615 {
 616         unsigned int od, m, frac, od1, od2, od3;
 617
 618         if (meson_hdmi_pll_find_params(priv, pll_freq, &m, &frac, &od)) {
 619                 od3 = 1;
 620                 if (od < 4) {
 621                         od1 = 2;
 622                         od2 = 1;
 623                 } else {
 624                         od2 = od / 4;
 625                         od1 = od / od2;
 626                 }
 627
 628                 DRM_DEBUG_DRIVER("PLL params for %dkHz: m=%x frac=%x od=%d/%d/%d\n",
 629                                  pll_freq, m, frac, od1, od2, od3);
 630
 631                 meson_hdmi_pll_set_params(priv, m, frac, od1, od2, od3);
 632
 633                 return;
 634         }
 635
 636         DRM_ERROR("Fatal, unable to find parameters for PLL freq %d\n",
 637                   pll_freq);
 638 }
 639
 640 enum drm_mode_status
 641 meson_vclk_vic_supported_freq(unsigned int freq)
 642 {
 643         int i;
 644
 645         DRM_DEBUG_DRIVER("freq = %d\n", freq);
 646
 647         for (i = 0 ; params[i].pixel_freq ; ++i) {
 648                 DRM_DEBUG_DRIVER("i = %d pixel_freq = %d alt = %d\n",
 649                                  i, params[i].pixel_freq,
 650                                  FREQ_1000_1001(params[i].pixel_freq));
 651                 /* Match strict frequency */
 652                 if (freq == params[i].pixel_freq)
 653                         return MODE_OK;
 654                 /* Match 1000/1001 variant */
 655                 if (freq == FREQ_1000_1001(params[i].pixel_freq))
 656                         return MODE_OK;
 657         }
 658
 659         return MODE_CLOCK_RANGE;
 660 }
 661 EXPORT_SYMBOL_GPL(meson_vclk_vic_supported_freq);
 662
 663 static void meson_vclk_set(struct meson_drm *priv, unsigned int pll_base_freq,
 664                            unsigned int od1, unsigned int od2, unsigned int od3,
 665                            unsigned int vid_pll_div, unsigned int vclk_div,
 666                            unsigned int hdmi_tx_div, unsigned int venc_div,
 667                            bool hdmi_use_enci, bool vic_alternate_clock)
 668 {
 669         unsigned int m = 0, frac = 0;
 670
 671         /* Set HDMI-TX sys clock */
 672         regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 673                            CTS_HDMI_SYS_SEL_MASK, 0);
 674         regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 675                            CTS_HDMI_SYS_DIV_MASK, 0);
 676         regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 677                            CTS_HDMI_SYS_EN, CTS_HDMI_SYS_EN);
 678
 679         /* Set HDMI PLL rate */
 680         if (!od1 && !od2 && !od3) {
 681                 meson_hdmi_pll_generic_set(priv, pll_base_freq);
 682         } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu")) {
 683                 switch (pll_base_freq) {
 684                 case 2970000:
 685                         m = 0x3d;
 686                         frac = vic_alternate_clock ? 0xd02 : 0xe00;
 687                         break;
 688                 case 4320000:
 689                         m = vic_alternate_clock ? 0x59 : 0x5a;
 690                         frac = vic_alternate_clock ? 0xe8f : 0;
 691                         break;
 692                 case 5940000:
 693                         m = 0x7b;
 694                         frac = vic_alternate_clock ? 0xa05 : 0xc00;
 695                         break;
 696                 }
 697
 698                 meson_hdmi_pll_set_params(priv, m, frac, od1, od2, od3);
 699         } else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
 700                    meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu")) {
 701                 switch (pll_base_freq) {
 702                 case 2970000:
 703                         m = 0x7b;
 704                         frac = vic_alternate_clock ? 0x281 : 0x300;
 705                         break;
 706                 case 4320000:
 707                         m = vic_alternate_clock ? 0xb3 : 0xb4;
 708                         frac = vic_alternate_clock ? 0x347 : 0;
 709                         break;
 710                 case 5940000:
 711                         m = 0xf7;
 712                         frac = vic_alternate_clock ? 0x102 : 0x200;
 713                         break;
 714                 }
 715
 716                 meson_hdmi_pll_set_params(priv, m, frac, od1, od2, od3);
 717         }
 718
 719         /* Setup vid_pll divider */
 720         meson_vid_pll_set(priv, vid_pll_div);
 721
 722         /* Set VCLK div */
 723         regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 724                            VCLK_SEL_MASK, 0);
 725         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 726                            VCLK_DIV_MASK, vclk_div - 1);
 727
 728         /* Set HDMI-TX source */
 729         switch (hdmi_tx_div) {
 730         case 1:
 731                 /* enable vclk_div1 gate */
 732                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 733                                    VCLK_DIV1_EN, VCLK_DIV1_EN);
 734
 735                 /* select vclk_div1 for HDMI-TX */
 736                 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 737                                    HDMI_TX_PIXEL_SEL_MASK, 0);
 738                 break;
 739         case 2:
 740                 /* enable vclk_div2 gate */
 741                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 742                                    VCLK_DIV2_EN, VCLK_DIV2_EN);
 743
 744                 /* select vclk_div2 for HDMI-TX */
 745                 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 746                         HDMI_TX_PIXEL_SEL_MASK, 1 << HDMI_TX_PIXEL_SEL_SHIFT);
 747                 break;
 748         case 4:
 749                 /* enable vclk_div4 gate */
 750                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 751                                    VCLK_DIV4_EN, VCLK_DIV4_EN);
 752
 753                 /* select vclk_div4 for HDMI-TX */
 754                 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 755                         HDMI_TX_PIXEL_SEL_MASK, 2 << HDMI_TX_PIXEL_SEL_SHIFT);
 756                 break;
 757         case 6:
 758                 /* enable vclk_div6 gate */
 759                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 760                                    VCLK_DIV6_EN, VCLK_DIV6_EN);
 761
 762                 /* select vclk_div6 for HDMI-TX */
 763                 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 764                         HDMI_TX_PIXEL_SEL_MASK, 3 << HDMI_TX_PIXEL_SEL_SHIFT);
 765                 break;
 766         case 12:
 767                 /* enable vclk_div12 gate */
 768                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 769                                    VCLK_DIV12_EN, VCLK_DIV12_EN);
 770
 771                 /* select vclk_div12 for HDMI-TX */
 772                 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
 773                         HDMI_TX_PIXEL_SEL_MASK, 4 << HDMI_TX_PIXEL_SEL_SHIFT);
 774                 break;
 775         }
 776         regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
 777                                    HDMI_TX_PIXEL_EN, HDMI_TX_PIXEL_EN);
 778
 779         /* Set ENCI/ENCP Source */
 780         switch (venc_div) {
 781         case 1:
 782                 /* enable vclk_div1 gate */
 783                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 784                                    VCLK_DIV1_EN, VCLK_DIV1_EN);
 785
 786                 if (hdmi_use_enci)
 787                         /* select vclk_div1 for enci */
 788                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 789                                            CTS_ENCI_SEL_MASK, 0);
 790                 else
 791                         /* select vclk_div1 for encp */
 792                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 793                                            CTS_ENCP_SEL_MASK, 0);
 794                 break;
 795         case 2:
 796                 /* enable vclk_div2 gate */
 797                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 798                                    VCLK_DIV2_EN, VCLK_DIV2_EN);
 799
 800                 if (hdmi_use_enci)
 801                         /* select vclk_div2 for enci */
 802                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 803                                 CTS_ENCI_SEL_MASK, 1 << CTS_ENCI_SEL_SHIFT);
 804                 else
 805                         /* select vclk_div2 for encp */
 806                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 807                                 CTS_ENCP_SEL_MASK, 1 << CTS_ENCP_SEL_SHIFT);
 808                 break;
 809         case 4:
 810                 /* enable vclk_div4 gate */
 811                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 812                                    VCLK_DIV4_EN, VCLK_DIV4_EN);
 813
 814                 if (hdmi_use_enci)
 815                         /* select vclk_div4 for enci */
 816                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 817                                 CTS_ENCI_SEL_MASK, 2 << CTS_ENCI_SEL_SHIFT);
 818                 else
 819                         /* select vclk_div4 for encp */
 820                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 821                                 CTS_ENCP_SEL_MASK, 2 << CTS_ENCP_SEL_SHIFT);
 822                 break;
 823         case 6:
 824                 /* enable vclk_div6 gate */
 825                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 826                                    VCLK_DIV6_EN, VCLK_DIV6_EN);
 827
 828                 if (hdmi_use_enci)
 829                         /* select vclk_div6 for enci */
 830                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 831                                 CTS_ENCI_SEL_MASK, 3 << CTS_ENCI_SEL_SHIFT);
 832                 else
 833                         /* select vclk_div6 for encp */
 834                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 835                                 CTS_ENCP_SEL_MASK, 3 << CTS_ENCP_SEL_SHIFT);
 836                 break;
 837         case 12:
 838                 /* enable vclk_div12 gate */
 839                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL,
 840                                    VCLK_DIV12_EN, VCLK_DIV12_EN);
 841
 842                 if (hdmi_use_enci)
 843                         /* select vclk_div12 for enci */
 844                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 845                                 CTS_ENCI_SEL_MASK, 4 << CTS_ENCI_SEL_SHIFT);
 846                 else
 847                         /* select vclk_div12 for encp */
 848                         regmap_update_bits(priv->hhi, HHI_VID_CLK_DIV,
 849                                 CTS_ENCP_SEL_MASK, 4 << CTS_ENCP_SEL_SHIFT);
 850                 break;
 851         }
 852
 853         if (hdmi_use_enci)
 854                 /* Enable ENCI clock gate */
 855                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
 856                                    CTS_ENCI_EN, CTS_ENCI_EN);
 857         else
 858                 /* Enable ENCP clock gate */
 859                 regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL2,
 860                                    CTS_ENCP_EN, CTS_ENCP_EN);
 861
 862         regmap_update_bits(priv->hhi, HHI_VID_CLK_CNTL, VCLK_EN, VCLK_EN);
 863 }
 864
 865 void meson_vclk_setup(struct meson_drm *priv, unsigned int target,
 866                       unsigned int vclk_freq, unsigned int venc_freq,
 867                       unsigned int dac_freq, bool hdmi_use_enci)
 868 {
 869         bool vic_alternate_clock = false;
 870         unsigned int freq;
 871         unsigned int hdmi_tx_div;
 872         unsigned int venc_div;
 873
 874         if (target == MESON_VCLK_TARGET_CVBS) {
 875                 meson_venci_cvbs_clock_config(priv);
 876                 return;
 877         } else if (target == MESON_VCLK_TARGET_DMT) {
 878                 /* The DMT clock path is fixed after the PLL:
 879                  * - automatic PLL freq + OD management
 880                  * - vid_pll_div = VID_PLL_DIV_5
 881                  * - vclk_div = 2
 882                  * - hdmi_tx_div = 1
 883                  * - venc_div = 1
 884                  * - encp encoder
 885                  */
 886                 meson_vclk_set(priv, vclk_freq * 10, 0, 0, 0,
 887                                VID_PLL_DIV_5, 2, 1, 1, false, false);
 888                 return;
 889         }
 890
 891         hdmi_tx_div = vclk_freq / dac_freq;
 892
 893         if (hdmi_tx_div == 0) {
 894                 pr_err("Fatal Error, invalid HDMI-TX freq %d\n",
 895                        dac_freq);
 896                 return;
 897         }
 898
 899         venc_div = vclk_freq / venc_freq;
 900
 901         if (venc_div == 0) {
 902                 pr_err("Fatal Error, invalid HDMI venc freq %d\n",
 903                        venc_freq);
 904                 return;
 905         }
 906
 907         for (freq = 0 ; params[freq].pixel_freq ; ++freq) {
 908                 if (vclk_freq == params[freq].pixel_freq ||
 909                     vclk_freq == FREQ_1000_1001(params[freq].pixel_freq)) {
 910                         if (vclk_freq != params[freq].pixel_freq)
 911                                 vic_alternate_clock = true;
 912                         else
 913                                 vic_alternate_clock = false;
 914
 915                         if (freq == MESON_VCLK_HDMI_ENCI_54000 &&
 916                             !hdmi_use_enci)
 917                                 continue;
 918
 919                         if (freq == MESON_VCLK_HDMI_DDR_54000 &&
 920                             hdmi_use_enci)
 921                                 continue;
 922
 923                         if (freq == MESON_VCLK_HDMI_DDR_148500 &&
 924                             dac_freq == vclk_freq)
 925                                 continue;
 926
 927                         if (freq == MESON_VCLK_HDMI_148500 &&
 928                             dac_freq != vclk_freq)
 929                                 continue;
 930                         break;
 931                 }
 932         }
 933
 934         if (!params[freq].pixel_freq) {
 935                 pr_err("Fatal Error, invalid HDMI vclk freq %d\n", vclk_freq);
 936                 return;
 937         }
 938
 939         meson_vclk_set(priv, params[freq].pll_base_freq,
 940                        params[freq].pll_od1, params[freq].pll_od2,
 941                        params[freq].pll_od3, params[freq].vid_pll_div,
 942                        params[freq].vclk_div, hdmi_tx_div, venc_div,
 943                        hdmi_use_enci, vic_alternate_clock);
 944 }
 945 EXPORT_SYMBOL_GPL(meson_vclk_setup);