drivers/gpu/drm/i915/display/icl_dsi.c

   1 /*
   2  * Copyright © 2018 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *   Madhav Chauhan <[email protected]>
  25  *   Jani Nikula <[email protected]>
  26  */
  27
  28 #include <drm/display/drm_dsc_helper.h>
  29 #include <drm/drm_atomic_helper.h>
  30 #include <drm/drm_mipi_dsi.h>
  31
  32 #include "i915_reg.h"
  33 #include "icl_dsi.h"
  34 #include "icl_dsi_regs.h"
  35 #include "intel_atomic.h"
  36 #include "intel_backlight.h"
  37 #include "intel_backlight_regs.h"
  38 #include "intel_combo_phy.h"
  39 #include "intel_combo_phy_regs.h"
  40 #include "intel_connector.h"
  41 #include "intel_crtc.h"
  42 #include "intel_ddi.h"
  43 #include "intel_de.h"
  44 #include "intel_dsi.h"
  45 #include "intel_dsi_vbt.h"
  46 #include "intel_panel.h"
  47 #include "intel_vdsc.h"
  48 #include "intel_vdsc_regs.h"
  49 #include "skl_scaler.h"
  50 #include "skl_universal_plane.h"
  51
  52 static int header_credits_available(struct drm_i915_private *dev_priv,
  53                                     enum transcoder dsi_trans)
  54 {
  55         return (intel_de_read(dev_priv, DSI_CMD_TXCTL(dsi_trans)) & FREE_HEADER_CREDIT_MASK)
  56                 >> FREE_HEADER_CREDIT_SHIFT;
  57 }
  58
  59 static int payload_credits_available(struct drm_i915_private *dev_priv,
  60                                      enum transcoder dsi_trans)
  61 {
  62         return (intel_de_read(dev_priv, DSI_CMD_TXCTL(dsi_trans)) & FREE_PLOAD_CREDIT_MASK)
  63                 >> FREE_PLOAD_CREDIT_SHIFT;
  64 }
  65
  66 static bool wait_for_header_credits(struct drm_i915_private *dev_priv,
  67                                     enum transcoder dsi_trans, int hdr_credit)
  68 {
  69         if (wait_for_us(header_credits_available(dev_priv, dsi_trans) >=
  70                         hdr_credit, 100)) {
  71                 drm_err(&dev_priv->drm, "DSI header credits not released\n");
  72                 return false;
  73         }
  74
  75         return true;
  76 }
  77
  78 static bool wait_for_payload_credits(struct drm_i915_private *dev_priv,
  79                                      enum transcoder dsi_trans, int payld_credit)
  80 {
  81         if (wait_for_us(payload_credits_available(dev_priv, dsi_trans) >=
  82                         payld_credit, 100)) {
  83                 drm_err(&dev_priv->drm, "DSI payload credits not released\n");
  84                 return false;
  85         }
  86
  87         return true;
  88 }
  89
  90 static enum transcoder dsi_port_to_transcoder(enum port port)
  91 {
  92         if (port == PORT_A)
  93                 return TRANSCODER_DSI_0;
  94         else
  95                 return TRANSCODER_DSI_1;
  96 }
  97
  98 static void wait_for_cmds_dispatched_to_panel(struct intel_encoder *encoder)
  99 {
 100         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 101         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 102         struct mipi_dsi_device *dsi;
 103         enum port port;
 104         enum transcoder dsi_trans;
 105         int ret;
 106
 107         /* wait for header/payload credits to be released */
 108         for_each_dsi_port(port, intel_dsi->ports) {
 109                 dsi_trans = dsi_port_to_transcoder(port);
 110                 wait_for_header_credits(dev_priv, dsi_trans, MAX_HEADER_CREDIT);
 111                 wait_for_payload_credits(dev_priv, dsi_trans, MAX_PLOAD_CREDIT);
 112         }
 113
 114         /* send nop DCS command */
 115         for_each_dsi_port(port, intel_dsi->ports) {
 116                 dsi = intel_dsi->dsi_hosts[port]->device;
 117                 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 118                 dsi->channel = 0;
 119                 ret = mipi_dsi_dcs_nop(dsi);
 120                 if (ret < 0)
 121                         drm_err(&dev_priv->drm,
 122                                 "error sending DCS NOP command\n");
 123         }
 124
 125         /* wait for header credits to be released */
 126         for_each_dsi_port(port, intel_dsi->ports) {
 127                 dsi_trans = dsi_port_to_transcoder(port);
 128                 wait_for_header_credits(dev_priv, dsi_trans, MAX_HEADER_CREDIT);
 129         }
 130
 131         /* wait for LP TX in progress bit to be cleared */
 132         for_each_dsi_port(port, intel_dsi->ports) {
 133                 dsi_trans = dsi_port_to_transcoder(port);
 134                 if (wait_for_us(!(intel_de_read(dev_priv, DSI_LP_MSG(dsi_trans)) &
 135                                   LPTX_IN_PROGRESS), 20))
 136                         drm_err(&dev_priv->drm, "LPTX bit not cleared\n");
 137         }
 138 }
 139
 140 static int dsi_send_pkt_payld(struct intel_dsi_host *host,
 141                               const struct mipi_dsi_packet *packet)
 142 {
 143         struct intel_dsi *intel_dsi = host->intel_dsi;
 144         struct drm_i915_private *i915 = to_i915(intel_dsi->base.base.dev);
 145         enum transcoder dsi_trans = dsi_port_to_transcoder(host->port);
 146         const u8 *data = packet->payload;
 147         u32 len = packet->payload_length;
 148         int i, j;
 149
 150         /* payload queue can accept *256 bytes*, check limit */
 151         if (len > MAX_PLOAD_CREDIT * 4) {
 152                 drm_err(&i915->drm, "payload size exceeds max queue limit\n");
 153                 return -EINVAL;
 154         }
 155
 156         for (i = 0; i < len; i += 4) {
 157                 u32 tmp = 0;
 158
 159                 if (!wait_for_payload_credits(i915, dsi_trans, 1))
 160                         return -EBUSY;
 161
 162                 for (j = 0; j < min_t(u32, len - i, 4); j++)
 163                         tmp |= *data++ << 8 * j;
 164
 165                 intel_de_write(i915, DSI_CMD_TXPYLD(dsi_trans), tmp);
 166         }
 167
 168         return 0;
 169 }
 170
 171 static int dsi_send_pkt_hdr(struct intel_dsi_host *host,
 172                             const struct mipi_dsi_packet *packet,
 173                             bool enable_lpdt)
 174 {
 175         struct intel_dsi *intel_dsi = host->intel_dsi;
 176         struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
 177         enum transcoder dsi_trans = dsi_port_to_transcoder(host->port);
 178         u32 tmp;
 179
 180         if (!wait_for_header_credits(dev_priv, dsi_trans, 1))
 181                 return -EBUSY;
 182
 183         tmp = intel_de_read(dev_priv, DSI_CMD_TXHDR(dsi_trans));
 184
 185         if (packet->payload)
 186                 tmp |= PAYLOAD_PRESENT;
 187         else
 188                 tmp &= ~PAYLOAD_PRESENT;
 189
 190         tmp &= ~VBLANK_FENCE;
 191
 192         if (enable_lpdt)
 193                 tmp |= LP_DATA_TRANSFER;
 194         else
 195                 tmp &= ~LP_DATA_TRANSFER;
 196
 197         tmp &= ~(PARAM_WC_MASK | VC_MASK | DT_MASK);
 198         tmp |= ((packet->header[0] & VC_MASK) << VC_SHIFT);
 199         tmp |= ((packet->header[0] & DT_MASK) << DT_SHIFT);
 200         tmp |= (packet->header[1] << PARAM_WC_LOWER_SHIFT);
 201         tmp |= (packet->header[2] << PARAM_WC_UPPER_SHIFT);
 202         intel_de_write(dev_priv, DSI_CMD_TXHDR(dsi_trans), tmp);
 203
 204         return 0;
 205 }
 206
 207 void icl_dsi_frame_update(struct intel_crtc_state *crtc_state)
 208 {
 209         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 210         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 211         u32 mode_flags;
 212         enum port port;
 213
 214         mode_flags = crtc_state->mode_flags;
 215
 216         /*
 217          * case 1 also covers dual link
 218          * In case of dual link, frame update should be set on
 219          * DSI_0
 220          */
 221         if (mode_flags & I915_MODE_FLAG_DSI_USE_TE0)
 222                 port = PORT_A;
 223         else if (mode_flags & I915_MODE_FLAG_DSI_USE_TE1)
 224                 port = PORT_B;
 225         else
 226                 return;
 227
 228         intel_de_rmw(dev_priv, DSI_CMD_FRMCTL(port), 0, DSI_FRAME_UPDATE_REQUEST);
 229 }
 230
 231 static void dsi_program_swing_and_deemphasis(struct intel_encoder *encoder)
 232 {
 233         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 234         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 235         enum phy phy;
 236         u32 tmp, mask, val;
 237         int lane;
 238
 239         for_each_dsi_phy(phy, intel_dsi->phys) {
 240                 /*
 241                  * Program voltage swing and pre-emphasis level values as per
 242                  * table in BSPEC under DDI buffer programing
 243                  */
 244                 mask = SCALING_MODE_SEL_MASK | RTERM_SELECT_MASK;
 245                 val = SCALING_MODE_SEL(0x2) | TAP2_DISABLE | TAP3_DISABLE |
 246                       RTERM_SELECT(0x6);
 247                 tmp = intel_de_read(dev_priv, ICL_PORT_TX_DW5_LN(0, phy));
 248                 tmp &= ~mask;
 249                 tmp |= val;
 250                 intel_de_write(dev_priv, ICL_PORT_TX_DW5_GRP(phy), tmp);
 251                 intel_de_rmw(dev_priv, ICL_PORT_TX_DW5_AUX(phy), mask, val);
 252
 253                 mask = SWING_SEL_LOWER_MASK | SWING_SEL_UPPER_MASK |
 254                        RCOMP_SCALAR_MASK;
 255                 val = SWING_SEL_UPPER(0x2) | SWING_SEL_LOWER(0x2) |
 256                       RCOMP_SCALAR(0x98);
 257                 tmp = intel_de_read(dev_priv, ICL_PORT_TX_DW2_LN(0, phy));
 258                 tmp &= ~mask;
 259                 tmp |= val;
 260                 intel_de_write(dev_priv, ICL_PORT_TX_DW2_GRP(phy), tmp);
 261                 intel_de_rmw(dev_priv, ICL_PORT_TX_DW2_AUX(phy), mask, val);
 262
 263                 mask = POST_CURSOR_1_MASK | POST_CURSOR_2_MASK |
 264                        CURSOR_COEFF_MASK;
 265                 val = POST_CURSOR_1(0x0) | POST_CURSOR_2(0x0) |
 266                       CURSOR_COEFF(0x3f);
 267                 intel_de_rmw(dev_priv, ICL_PORT_TX_DW4_AUX(phy), mask, val);
 268
 269                 /* Bspec: must not use GRP register for write */
 270                 for (lane = 0; lane <= 3; lane++)
 271                         intel_de_rmw(dev_priv, ICL_PORT_TX_DW4_LN(lane, phy),
 272                                      mask, val);
 273         }
 274 }
 275
 276 static void configure_dual_link_mode(struct intel_encoder *encoder,
 277                                      const struct intel_crtc_state *pipe_config)
 278 {
 279         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 280         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 281         i915_reg_t dss_ctl1_reg, dss_ctl2_reg;
 282         u32 dss_ctl1;
 283
 284         /* FIXME: Move all DSS handling to intel_vdsc.c */
 285         if (DISPLAY_VER(dev_priv) >= 12) {
 286                 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
 287
 288                 dss_ctl1_reg = ICL_PIPE_DSS_CTL1(crtc->pipe);
 289                 dss_ctl2_reg = ICL_PIPE_DSS_CTL2(crtc->pipe);
 290         } else {
 291                 dss_ctl1_reg = DSS_CTL1;
 292                 dss_ctl2_reg = DSS_CTL2;
 293         }
 294
 295         dss_ctl1 = intel_de_read(dev_priv, dss_ctl1_reg);
 296         dss_ctl1 |= SPLITTER_ENABLE;
 297         dss_ctl1 &= ~OVERLAP_PIXELS_MASK;
 298         dss_ctl1 |= OVERLAP_PIXELS(intel_dsi->pixel_overlap);
 299
 300         if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
 301                 const struct drm_display_mode *adjusted_mode =
 302                                         &pipe_config->hw.adjusted_mode;
 303                 u16 hactive = adjusted_mode->crtc_hdisplay;
 304                 u16 dl_buffer_depth;
 305
 306                 dss_ctl1 &= ~DUAL_LINK_MODE_INTERLEAVE;
 307                 dl_buffer_depth = hactive / 2 + intel_dsi->pixel_overlap;
 308
 309                 if (dl_buffer_depth > MAX_DL_BUFFER_TARGET_DEPTH)
 310                         drm_err(&dev_priv->drm,
 311                                 "DL buffer depth exceed max value\n");
 312
 313                 dss_ctl1 &= ~LEFT_DL_BUF_TARGET_DEPTH_MASK;
 314                 dss_ctl1 |= LEFT_DL_BUF_TARGET_DEPTH(dl_buffer_depth);
 315                 intel_de_rmw(dev_priv, dss_ctl2_reg, RIGHT_DL_BUF_TARGET_DEPTH_MASK,
 316                              RIGHT_DL_BUF_TARGET_DEPTH(dl_buffer_depth));
 317         } else {
 318                 /* Interleave */
 319                 dss_ctl1 |= DUAL_LINK_MODE_INTERLEAVE;
 320         }
 321
 322         intel_de_write(dev_priv, dss_ctl1_reg, dss_ctl1);
 323 }
 324
 325 /* aka DSI 8X clock */
 326 static int afe_clk(struct intel_encoder *encoder,
 327                    const struct intel_crtc_state *crtc_state)
 328 {
 329         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 330         int bpp;
 331
 332         if (crtc_state->dsc.compression_enable)
 333                 bpp = crtc_state->dsc.compressed_bpp;
 334         else
 335                 bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
 336
 337         return DIV_ROUND_CLOSEST(intel_dsi->pclk * bpp, intel_dsi->lane_count);
 338 }
 339
 340 static void gen11_dsi_program_esc_clk_div(struct intel_encoder *encoder,
 341                                           const struct intel_crtc_state *crtc_state)
 342 {
 343         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 344         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 345         enum port port;
 346         int afe_clk_khz;
 347         int theo_word_clk, act_word_clk;
 348         u32 esc_clk_div_m, esc_clk_div_m_phy;
 349
 350         afe_clk_khz = afe_clk(encoder, crtc_state);
 351
 352         if (IS_ALDERLAKE_S(dev_priv) || IS_ALDERLAKE_P(dev_priv)) {
 353                 theo_word_clk = DIV_ROUND_UP(afe_clk_khz, 8 * DSI_MAX_ESC_CLK);
 354                 act_word_clk = max(3, theo_word_clk + (theo_word_clk + 1) % 2);
 355                 esc_clk_div_m = act_word_clk * 8;
 356                 esc_clk_div_m_phy = (act_word_clk - 1) / 2;
 357         } else {
 358                 esc_clk_div_m = DIV_ROUND_UP(afe_clk_khz, DSI_MAX_ESC_CLK);
 359         }
 360
 361         for_each_dsi_port(port, intel_dsi->ports) {
 362                 intel_de_write(dev_priv, ICL_DSI_ESC_CLK_DIV(port),
 363                                esc_clk_div_m & ICL_ESC_CLK_DIV_MASK);
 364                 intel_de_posting_read(dev_priv, ICL_DSI_ESC_CLK_DIV(port));
 365         }
 366
 367         for_each_dsi_port(port, intel_dsi->ports) {
 368                 intel_de_write(dev_priv, ICL_DPHY_ESC_CLK_DIV(port),
 369                                esc_clk_div_m & ICL_ESC_CLK_DIV_MASK);
 370                 intel_de_posting_read(dev_priv, ICL_DPHY_ESC_CLK_DIV(port));
 371         }
 372
 373         if (IS_ALDERLAKE_S(dev_priv) || IS_ALDERLAKE_P(dev_priv)) {
 374                 for_each_dsi_port(port, intel_dsi->ports) {
 375                         intel_de_write(dev_priv, ADL_MIPIO_DW(port, 8),
 376                                        esc_clk_div_m_phy & TX_ESC_CLK_DIV_PHY);
 377                         intel_de_posting_read(dev_priv, ADL_MIPIO_DW(port, 8));
 378                 }
 379         }
 380 }
 381
 382 static void get_dsi_io_power_domains(struct drm_i915_private *dev_priv,
 383                                      struct intel_dsi *intel_dsi)
 384 {
 385         enum port port;
 386
 387         for_each_dsi_port(port, intel_dsi->ports) {
 388                 drm_WARN_ON(&dev_priv->drm, intel_dsi->io_wakeref[port]);
 389                 intel_dsi->io_wakeref[port] =
 390                         intel_display_power_get(dev_priv,
 391                                                 port == PORT_A ?
 392                                                 POWER_DOMAIN_PORT_DDI_IO_A :
 393                                                 POWER_DOMAIN_PORT_DDI_IO_B);
 394         }
 395 }
 396
 397 static void gen11_dsi_enable_io_power(struct intel_encoder *encoder)
 398 {
 399         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 400         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 401         enum port port;
 402
 403         for_each_dsi_port(port, intel_dsi->ports)
 404                 intel_de_rmw(dev_priv, ICL_DSI_IO_MODECTL(port),
 405                              0, COMBO_PHY_MODE_DSI);
 406
 407         get_dsi_io_power_domains(dev_priv, intel_dsi);
 408 }
 409
 410 static void gen11_dsi_power_up_lanes(struct intel_encoder *encoder)
 411 {
 412         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 413         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 414         enum phy phy;
 415
 416         for_each_dsi_phy(phy, intel_dsi->phys)
 417                 intel_combo_phy_power_up_lanes(dev_priv, phy, true,
 418                                                intel_dsi->lane_count, false);
 419 }
 420
 421 static void gen11_dsi_config_phy_lanes_sequence(struct intel_encoder *encoder)
 422 {
 423         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 424         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 425         enum phy phy;
 426         u32 tmp;
 427         int lane;
 428
 429         /* Step 4b(i) set loadgen select for transmit and aux lanes */
 430         for_each_dsi_phy(phy, intel_dsi->phys) {
 431                 intel_de_rmw(dev_priv, ICL_PORT_TX_DW4_AUX(phy), LOADGEN_SELECT, 0);
 432                 for (lane = 0; lane <= 3; lane++)
 433                         intel_de_rmw(dev_priv, ICL_PORT_TX_DW4_LN(lane, phy),
 434                                      LOADGEN_SELECT, lane != 2 ? LOADGEN_SELECT : 0);
 435         }
 436
 437         /* Step 4b(ii) set latency optimization for transmit and aux lanes */
 438         for_each_dsi_phy(phy, intel_dsi->phys) {
 439                 intel_de_rmw(dev_priv, ICL_PORT_TX_DW2_AUX(phy),
 440                              FRC_LATENCY_OPTIM_MASK, FRC_LATENCY_OPTIM_VAL(0x5));
 441                 tmp = intel_de_read(dev_priv, ICL_PORT_TX_DW2_LN(0, phy));
 442                 tmp &= ~FRC_LATENCY_OPTIM_MASK;
 443                 tmp |= FRC_LATENCY_OPTIM_VAL(0x5);
 444                 intel_de_write(dev_priv, ICL_PORT_TX_DW2_GRP(phy), tmp);
 445
 446                 /* For EHL, TGL, set latency optimization for PCS_DW1 lanes */
 447                 if (IS_JASPERLAKE(dev_priv) || IS_ELKHARTLAKE(dev_priv) ||
 448                     (DISPLAY_VER(dev_priv) >= 12)) {
 449                         intel_de_rmw(dev_priv, ICL_PORT_PCS_DW1_AUX(phy),
 450                                      LATENCY_OPTIM_MASK, LATENCY_OPTIM_VAL(0));
 451
 452                         tmp = intel_de_read(dev_priv,
 453                                             ICL_PORT_PCS_DW1_LN(0, phy));
 454                         tmp &= ~LATENCY_OPTIM_MASK;
 455                         tmp |= LATENCY_OPTIM_VAL(0x1);
 456                         intel_de_write(dev_priv, ICL_PORT_PCS_DW1_GRP(phy),
 457                                        tmp);
 458                 }
 459         }
 460
 461 }
 462
 463 static void gen11_dsi_voltage_swing_program_seq(struct intel_encoder *encoder)
 464 {
 465         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 466         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 467         u32 tmp;
 468         enum phy phy;
 469
 470         /* clear common keeper enable bit */
 471         for_each_dsi_phy(phy, intel_dsi->phys) {
 472                 tmp = intel_de_read(dev_priv, ICL_PORT_PCS_DW1_LN(0, phy));
 473                 tmp &= ~COMMON_KEEPER_EN;
 474                 intel_de_write(dev_priv, ICL_PORT_PCS_DW1_GRP(phy), tmp);
 475                 intel_de_rmw(dev_priv, ICL_PORT_PCS_DW1_AUX(phy), COMMON_KEEPER_EN, 0);
 476         }
 477
 478         /*
 479          * Set SUS Clock Config bitfield to 11b
 480          * Note: loadgen select program is done
 481          * as part of lane phy sequence configuration
 482          */
 483         for_each_dsi_phy(phy, intel_dsi->phys)
 484                 intel_de_rmw(dev_priv, ICL_PORT_CL_DW5(phy), 0, SUS_CLOCK_CONFIG);
 485
 486         /* Clear training enable to change swing values */
 487         for_each_dsi_phy(phy, intel_dsi->phys) {
 488                 tmp = intel_de_read(dev_priv, ICL_PORT_TX_DW5_LN(0, phy));
 489                 tmp &= ~TX_TRAINING_EN;
 490                 intel_de_write(dev_priv, ICL_PORT_TX_DW5_GRP(phy), tmp);
 491                 intel_de_rmw(dev_priv, ICL_PORT_TX_DW5_AUX(phy), TX_TRAINING_EN, 0);
 492         }
 493
 494         /* Program swing and de-emphasis */
 495         dsi_program_swing_and_deemphasis(encoder);
 496
 497         /* Set training enable to trigger update */
 498         for_each_dsi_phy(phy, intel_dsi->phys) {
 499                 tmp = intel_de_read(dev_priv, ICL_PORT_TX_DW5_LN(0, phy));
 500                 tmp |= TX_TRAINING_EN;
 501                 intel_de_write(dev_priv, ICL_PORT_TX_DW5_GRP(phy), tmp);
 502                 intel_de_rmw(dev_priv, ICL_PORT_TX_DW5_AUX(phy), 0, TX_TRAINING_EN);
 503         }
 504 }
 505
 506 static void gen11_dsi_enable_ddi_buffer(struct intel_encoder *encoder)
 507 {
 508         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 509         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 510         enum port port;
 511
 512         for_each_dsi_port(port, intel_dsi->ports) {
 513                 intel_de_rmw(dev_priv, DDI_BUF_CTL(port), 0, DDI_BUF_CTL_ENABLE);
 514
 515                 if (wait_for_us(!(intel_de_read(dev_priv, DDI_BUF_CTL(port)) &
 516                                   DDI_BUF_IS_IDLE),
 517                                   500))
 518                         drm_err(&dev_priv->drm, "DDI port:%c buffer idle\n",
 519                                 port_name(port));
 520         }
 521 }
 522
 523 static void
 524 gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder,
 525                              const struct intel_crtc_state *crtc_state)
 526 {
 527         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 528         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 529         enum port port;
 530         enum phy phy;
 531
 532         /* Program DPHY clock lanes timings */
 533         for_each_dsi_port(port, intel_dsi->ports)
 534                 intel_de_write(dev_priv, DPHY_CLK_TIMING_PARAM(port),
 535                                intel_dsi->dphy_reg);
 536
 537         /* Program DPHY data lanes timings */
 538         for_each_dsi_port(port, intel_dsi->ports)
 539                 intel_de_write(dev_priv, DPHY_DATA_TIMING_PARAM(port),
 540                                intel_dsi->dphy_data_lane_reg);
 541
 542         /*
 543          * If DSI link operating at or below an 800 MHz,
 544          * TA_SURE should be override and programmed to
 545          * a value '0' inside TA_PARAM_REGISTERS otherwise
 546          * leave all fields at HW default values.
 547          */
 548         if (DISPLAY_VER(dev_priv) == 11) {
 549                 if (afe_clk(encoder, crtc_state) <= 800000) {
 550                         for_each_dsi_port(port, intel_dsi->ports)
 551                                 intel_de_rmw(dev_priv, DPHY_TA_TIMING_PARAM(port),
 552                                              TA_SURE_MASK,
 553                                              TA_SURE_OVERRIDE | TA_SURE(0));
 554                 }
 555         }
 556
 557         if (IS_JASPERLAKE(dev_priv) || IS_ELKHARTLAKE(dev_priv)) {
 558                 for_each_dsi_phy(phy, intel_dsi->phys)
 559                         intel_de_rmw(dev_priv, ICL_DPHY_CHKN(phy),
 560                                      0, ICL_DPHY_CHKN_AFE_OVER_PPI_STRAP);
 561         }
 562 }
 563
 564 static void
 565 gen11_dsi_setup_timings(struct intel_encoder *encoder,
 566                         const struct intel_crtc_state *crtc_state)
 567 {
 568         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 569         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 570         enum port port;
 571
 572         /* Program T-INIT master registers */
 573         for_each_dsi_port(port, intel_dsi->ports)
 574                 intel_de_rmw(dev_priv, ICL_DSI_T_INIT_MASTER(port),
 575                              DSI_T_INIT_MASTER_MASK, intel_dsi->init_count);
 576
 577         /* shadow register inside display core */
 578         for_each_dsi_port(port, intel_dsi->ports)
 579                 intel_de_write(dev_priv, DSI_CLK_TIMING_PARAM(port),
 580                                intel_dsi->dphy_reg);
 581
 582         /* shadow register inside display core */
 583         for_each_dsi_port(port, intel_dsi->ports)
 584                 intel_de_write(dev_priv, DSI_DATA_TIMING_PARAM(port),
 585                                intel_dsi->dphy_data_lane_reg);
 586
 587         /* shadow register inside display core */
 588         if (DISPLAY_VER(dev_priv) == 11) {
 589                 if (afe_clk(encoder, crtc_state) <= 800000) {
 590                         for_each_dsi_port(port, intel_dsi->ports) {
 591                                 intel_de_rmw(dev_priv, DSI_TA_TIMING_PARAM(port),
 592                                              TA_SURE_MASK,
 593                                              TA_SURE_OVERRIDE | TA_SURE(0));
 594                         }
 595                 }
 596         }
 597 }
 598
 599 static void gen11_dsi_gate_clocks(struct intel_encoder *encoder)
 600 {
 601         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 602         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 603         u32 tmp;
 604         enum phy phy;
 605
 606         mutex_lock(&dev_priv->display.dpll.lock);
 607         tmp = intel_de_read(dev_priv, ICL_DPCLKA_CFGCR0);
 608         for_each_dsi_phy(phy, intel_dsi->phys)
 609                 tmp |= ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
 610
 611         intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, tmp);
 612         mutex_unlock(&dev_priv->display.dpll.lock);
 613 }
 614
 615 static void gen11_dsi_ungate_clocks(struct intel_encoder *encoder)
 616 {
 617         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 618         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 619         u32 tmp;
 620         enum phy phy;
 621
 622         mutex_lock(&dev_priv->display.dpll.lock);
 623         tmp = intel_de_read(dev_priv, ICL_DPCLKA_CFGCR0);
 624         for_each_dsi_phy(phy, intel_dsi->phys)
 625                 tmp &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
 626
 627         intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, tmp);
 628         mutex_unlock(&dev_priv->display.dpll.lock);
 629 }
 630
 631 static bool gen11_dsi_is_clock_enabled(struct intel_encoder *encoder)
 632 {
 633         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 634         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 635         bool clock_enabled = false;
 636         enum phy phy;
 637         u32 tmp;
 638
 639         tmp = intel_de_read(dev_priv, ICL_DPCLKA_CFGCR0);
 640
 641         for_each_dsi_phy(phy, intel_dsi->phys) {
 642                 if (!(tmp & ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)))
 643                         clock_enabled = true;
 644         }
 645
 646         return clock_enabled;
 647 }
 648
 649 static void gen11_dsi_map_pll(struct intel_encoder *encoder,
 650                               const struct intel_crtc_state *crtc_state)
 651 {
 652         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 653         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 654         struct intel_shared_dpll *pll = crtc_state->shared_dpll;
 655         enum phy phy;
 656         u32 val;
 657
 658         mutex_lock(&dev_priv->display.dpll.lock);
 659
 660         val = intel_de_read(dev_priv, ICL_DPCLKA_CFGCR0);
 661         for_each_dsi_phy(phy, intel_dsi->phys) {
 662                 val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
 663                 val |= ICL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
 664         }
 665         intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);
 666
 667         for_each_dsi_phy(phy, intel_dsi->phys) {
 668                 val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
 669         }
 670         intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);
 671
 672         intel_de_posting_read(dev_priv, ICL_DPCLKA_CFGCR0);
 673
 674         mutex_unlock(&dev_priv->display.dpll.lock);
 675 }
 676
 677 static void
 678 gen11_dsi_configure_transcoder(struct intel_encoder *encoder,
 679                                const struct intel_crtc_state *pipe_config)
 680 {
 681         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 682         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 683         struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
 684         enum pipe pipe = crtc->pipe;
 685         u32 tmp;
 686         enum port port;
 687         enum transcoder dsi_trans;
 688
 689         for_each_dsi_port(port, intel_dsi->ports) {
 690                 dsi_trans = dsi_port_to_transcoder(port);
 691                 tmp = intel_de_read(dev_priv, DSI_TRANS_FUNC_CONF(dsi_trans));
 692
 693                 if (intel_dsi->eotp_pkt)
 694                         tmp &= ~EOTP_DISABLED;
 695                 else
 696                         tmp |= EOTP_DISABLED;
 697
 698                 /* enable link calibration if freq > 1.5Gbps */
 699                 if (afe_clk(encoder, pipe_config) >= 1500 * 1000) {
 700                         tmp &= ~LINK_CALIBRATION_MASK;
 701                         tmp |= CALIBRATION_ENABLED_INITIAL_ONLY;
 702                 }
 703
 704                 /* configure continuous clock */
 705                 tmp &= ~CONTINUOUS_CLK_MASK;
 706                 if (intel_dsi->clock_stop)
 707                         tmp |= CLK_ENTER_LP_AFTER_DATA;
 708                 else
 709                         tmp |= CLK_HS_CONTINUOUS;
 710
 711                 /* configure buffer threshold limit to minimum */
 712                 tmp &= ~PIX_BUF_THRESHOLD_MASK;
 713                 tmp |= PIX_BUF_THRESHOLD_1_4;
 714
 715                 /* set virtual channel to '0' */
 716                 tmp &= ~PIX_VIRT_CHAN_MASK;
 717                 tmp |= PIX_VIRT_CHAN(0);
 718
 719                 /* program BGR transmission */
 720                 if (intel_dsi->bgr_enabled)
 721                         tmp |= BGR_TRANSMISSION;
 722
 723                 /* select pixel format */
 724                 tmp &= ~PIX_FMT_MASK;
 725                 if (pipe_config->dsc.compression_enable) {
 726                         tmp |= PIX_FMT_COMPRESSED;
 727                 } else {
 728                         switch (intel_dsi->pixel_format) {
 729                         default:
 730                                 MISSING_CASE(intel_dsi->pixel_format);
 731                                 fallthrough;
 732                         case MIPI_DSI_FMT_RGB565:
 733                                 tmp |= PIX_FMT_RGB565;
 734                                 break;
 735                         case MIPI_DSI_FMT_RGB666_PACKED:
 736                                 tmp |= PIX_FMT_RGB666_PACKED;
 737                                 break;
 738                         case MIPI_DSI_FMT_RGB666:
 739                                 tmp |= PIX_FMT_RGB666_LOOSE;
 740                                 break;
 741                         case MIPI_DSI_FMT_RGB888:
 742                                 tmp |= PIX_FMT_RGB888;
 743                                 break;
 744                         }
 745                 }
 746
 747                 if (DISPLAY_VER(dev_priv) >= 12) {
 748                         if (is_vid_mode(intel_dsi))
 749                                 tmp |= BLANKING_PACKET_ENABLE;
 750                 }
 751
 752                 /* program DSI operation mode */
 753                 if (is_vid_mode(intel_dsi)) {
 754                         tmp &= ~OP_MODE_MASK;
 755                         switch (intel_dsi->video_mode) {
 756                         default:
 757                                 MISSING_CASE(intel_dsi->video_mode);
 758                                 fallthrough;
 759                         case NON_BURST_SYNC_EVENTS:
 760                                 tmp |= VIDEO_MODE_SYNC_EVENT;
 761                                 break;
 762                         case NON_BURST_SYNC_PULSE:
 763                                 tmp |= VIDEO_MODE_SYNC_PULSE;
 764                                 break;
 765                         }
 766                 } else {
 767                         /*
 768                          * FIXME: Retrieve this info from VBT.
 769                          * As per the spec when dsi transcoder is operating
 770                          * in TE GATE mode, TE comes from GPIO
 771                          * which is UTIL PIN for DSI 0.
 772                          * Also this GPIO would not be used for other
 773                          * purposes is an assumption.
 774                          */
 775                         tmp &= ~OP_MODE_MASK;
 776                         tmp |= CMD_MODE_TE_GATE;
 777                         tmp |= TE_SOURCE_GPIO;
 778                 }
 779
 780                 intel_de_write(dev_priv, DSI_TRANS_FUNC_CONF(dsi_trans), tmp);
 781         }
 782
 783         /* enable port sync mode if dual link */
 784         if (intel_dsi->dual_link) {
 785                 for_each_dsi_port(port, intel_dsi->ports) {
 786                         dsi_trans = dsi_port_to_transcoder(port);
 787                         intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL2(dsi_trans),
 788                                      0, PORT_SYNC_MODE_ENABLE);
 789                 }
 790
 791                 /* configure stream splitting */
 792                 configure_dual_link_mode(encoder, pipe_config);
 793         }
 794
 795         for_each_dsi_port(port, intel_dsi->ports) {
 796                 dsi_trans = dsi_port_to_transcoder(port);
 797
 798                 /* select data lane width */
 799                 tmp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(dsi_trans));
 800                 tmp &= ~DDI_PORT_WIDTH_MASK;
 801                 tmp |= DDI_PORT_WIDTH(intel_dsi->lane_count);
 802
 803                 /* select input pipe */
 804                 tmp &= ~TRANS_DDI_EDP_INPUT_MASK;
 805                 switch (pipe) {
 806                 default:
 807                         MISSING_CASE(pipe);
 808                         fallthrough;
 809                 case PIPE_A:
 810                         tmp |= TRANS_DDI_EDP_INPUT_A_ON;
 811                         break;
 812                 case PIPE_B:
 813                         tmp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
 814                         break;
 815                 case PIPE_C:
 816                         tmp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
 817                         break;
 818                 case PIPE_D:
 819                         tmp |= TRANS_DDI_EDP_INPUT_D_ONOFF;
 820                         break;
 821                 }
 822
 823                 /* enable DDI buffer */
 824                 tmp |= TRANS_DDI_FUNC_ENABLE;
 825                 intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(dsi_trans), tmp);
 826         }
 827
 828         /* wait for link ready */
 829         for_each_dsi_port(port, intel_dsi->ports) {
 830                 dsi_trans = dsi_port_to_transcoder(port);
 831                 if (wait_for_us((intel_de_read(dev_priv, DSI_TRANS_FUNC_CONF(dsi_trans)) &
 832                                  LINK_READY), 2500))
 833                         drm_err(&dev_priv->drm, "DSI link not ready\n");
 834         }
 835 }
 836
 837 static void
 838 gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder,
 839                                  const struct intel_crtc_state *crtc_state)
 840 {
 841         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 842         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 843         const struct drm_display_mode *adjusted_mode =
 844                 &crtc_state->hw.adjusted_mode;
 845         enum port port;
 846         enum transcoder dsi_trans;
 847         /* horizontal timings */
 848         u16 htotal, hactive, hsync_start, hsync_end, hsync_size;
 849         u16 hback_porch;
 850         /* vertical timings */
 851         u16 vtotal, vactive, vsync_start, vsync_end, vsync_shift;
 852         int mul = 1, div = 1;
 853
 854         /*
 855          * Adjust horizontal timings (htotal, hsync_start, hsync_end) to account
 856          * for slower link speed if DSC is enabled.
 857          *
 858          * The compression frequency ratio is the ratio between compressed and
 859          * non-compressed link speeds, and simplifies down to the ratio between
 860          * compressed and non-compressed bpp.
 861          */
 862         if (crtc_state->dsc.compression_enable) {
 863                 mul = crtc_state->dsc.compressed_bpp;
 864                 div = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
 865         }
 866
 867         hactive = adjusted_mode->crtc_hdisplay;
 868
 869         if (is_vid_mode(intel_dsi))
 870                 htotal = DIV_ROUND_UP(adjusted_mode->crtc_htotal * mul, div);
 871         else
 872                 htotal = DIV_ROUND_UP((hactive + 160) * mul, div);
 873
 874         hsync_start = DIV_ROUND_UP(adjusted_mode->crtc_hsync_start * mul, div);
 875         hsync_end = DIV_ROUND_UP(adjusted_mode->crtc_hsync_end * mul, div);
 876         hsync_size  = hsync_end - hsync_start;
 877         hback_porch = (adjusted_mode->crtc_htotal -
 878                        adjusted_mode->crtc_hsync_end);
 879         vactive = adjusted_mode->crtc_vdisplay;
 880
 881         if (is_vid_mode(intel_dsi)) {
 882                 vtotal = adjusted_mode->crtc_vtotal;
 883         } else {
 884                 int bpp, line_time_us, byte_clk_period_ns;
 885
 886                 if (crtc_state->dsc.compression_enable)
 887                         bpp = crtc_state->dsc.compressed_bpp;
 888                 else
 889                         bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
 890
 891                 byte_clk_period_ns = 1000000 / afe_clk(encoder, crtc_state);
 892                 line_time_us = (htotal * (bpp / 8) * byte_clk_period_ns) / (1000 * intel_dsi->lane_count);
 893                 vtotal = vactive + DIV_ROUND_UP(400, line_time_us);
 894         }
 895         vsync_start = adjusted_mode->crtc_vsync_start;
 896         vsync_end = adjusted_mode->crtc_vsync_end;
 897         vsync_shift = hsync_start - htotal / 2;
 898
 899         if (intel_dsi->dual_link) {
 900                 hactive /= 2;
 901                 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
 902                         hactive += intel_dsi->pixel_overlap;
 903                 htotal /= 2;
 904         }
 905
 906         /* minimum hactive as per bspec: 256 pixels */
 907         if (adjusted_mode->crtc_hdisplay < 256)
 908                 drm_err(&dev_priv->drm, "hactive is less then 256 pixels\n");
 909
 910         /* if RGB666 format, then hactive must be multiple of 4 pixels */
 911         if (intel_dsi->pixel_format == MIPI_DSI_FMT_RGB666 && hactive % 4 != 0)
 912                 drm_err(&dev_priv->drm,
 913                         "hactive pixels are not multiple of 4\n");
 914
 915         /* program TRANS_HTOTAL register */
 916         for_each_dsi_port(port, intel_dsi->ports) {
 917                 dsi_trans = dsi_port_to_transcoder(port);
 918                 intel_de_write(dev_priv, TRANS_HTOTAL(dsi_trans),
 919                                HACTIVE(hactive - 1) | HTOTAL(htotal - 1));
 920         }
 921
 922         /* TRANS_HSYNC register to be programmed only for video mode */
 923         if (is_vid_mode(intel_dsi)) {
 924                 if (intel_dsi->video_mode == NON_BURST_SYNC_PULSE) {
 925                         /* BSPEC: hsync size should be atleast 16 pixels */
 926                         if (hsync_size < 16)
 927                                 drm_err(&dev_priv->drm,
 928                                         "hsync size < 16 pixels\n");
 929                 }
 930
 931                 if (hback_porch < 16)
 932                         drm_err(&dev_priv->drm, "hback porch < 16 pixels\n");
 933
 934                 if (intel_dsi->dual_link) {
 935                         hsync_start /= 2;
 936                         hsync_end /= 2;
 937                 }
 938
 939                 for_each_dsi_port(port, intel_dsi->ports) {
 940                         dsi_trans = dsi_port_to_transcoder(port);
 941                         intel_de_write(dev_priv, TRANS_HSYNC(dsi_trans),
 942                                        HSYNC_START(hsync_start - 1) | HSYNC_END(hsync_end - 1));
 943                 }
 944         }
 945
 946         /* program TRANS_VTOTAL register */
 947         for_each_dsi_port(port, intel_dsi->ports) {
 948                 dsi_trans = dsi_port_to_transcoder(port);
 949                 /*
 950                  * FIXME: Programing this by assuming progressive mode, since
 951                  * non-interlaced info from VBT is not saved inside
 952                  * struct drm_display_mode.
 953                  * For interlace mode: program required pixel minus 2
 954                  */
 955                 intel_de_write(dev_priv, TRANS_VTOTAL(dsi_trans),
 956                                VACTIVE(vactive - 1) | VTOTAL(vtotal - 1));
 957         }
 958
 959         if (vsync_end < vsync_start || vsync_end > vtotal)
 960                 drm_err(&dev_priv->drm, "Invalid vsync_end value\n");
 961
 962         if (vsync_start < vactive)
 963                 drm_err(&dev_priv->drm, "vsync_start less than vactive\n");
 964
 965         /* program TRANS_VSYNC register for video mode only */
 966         if (is_vid_mode(intel_dsi)) {
 967                 for_each_dsi_port(port, intel_dsi->ports) {
 968                         dsi_trans = dsi_port_to_transcoder(port);
 969                         intel_de_write(dev_priv, TRANS_VSYNC(dsi_trans),
 970                                        VSYNC_START(vsync_start - 1) | VSYNC_END(vsync_end - 1));
 971                 }
 972         }
 973
 974         /*
 975          * FIXME: It has to be programmed only for video modes and interlaced
 976          * modes. Put the check condition here once interlaced
 977          * info available as described above.
 978          * program TRANS_VSYNCSHIFT register
 979          */
 980         if (is_vid_mode(intel_dsi)) {
 981                 for_each_dsi_port(port, intel_dsi->ports) {
 982                         dsi_trans = dsi_port_to_transcoder(port);
 983                         intel_de_write(dev_priv, TRANS_VSYNCSHIFT(dsi_trans),
 984                                        vsync_shift);
 985                 }
 986         }
 987
 988         /*
 989          * program TRANS_VBLANK register, should be same as vtotal programmed
 990          *
 991          * FIXME get rid of these local hacks and do it right,
 992          * this will not handle eg. delayed vblank correctly.
 993          */
 994         if (DISPLAY_VER(dev_priv) >= 12) {
 995                 for_each_dsi_port(port, intel_dsi->ports) {
 996                         dsi_trans = dsi_port_to_transcoder(port);
 997                         intel_de_write(dev_priv, TRANS_VBLANK(dsi_trans),
 998                                        VBLANK_START(vactive - 1) | VBLANK_END(vtotal - 1));
 999                 }
1000         }
1001 }
1002
1003 static void gen11_dsi_enable_transcoder(struct intel_encoder *encoder)
1004 {
1005         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1006         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1007         enum port port;
1008         enum transcoder dsi_trans;
1009
1010         for_each_dsi_port(port, intel_dsi->ports) {
1011                 dsi_trans = dsi_port_to_transcoder(port);
1012                 intel_de_rmw(dev_priv, TRANSCONF(dsi_trans), 0, TRANSCONF_ENABLE);
1013
1014                 /* wait for transcoder to be enabled */
1015                 if (intel_de_wait_for_set(dev_priv, TRANSCONF(dsi_trans),
1016                                           TRANSCONF_STATE_ENABLE, 10))
1017                         drm_err(&dev_priv->drm,
1018                                 "DSI transcoder not enabled\n");
1019         }
1020 }
1021
1022 static void gen11_dsi_setup_timeouts(struct intel_encoder *encoder,
1023                                      const struct intel_crtc_state *crtc_state)
1024 {
1025         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1026         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1027         enum port port;
1028         enum transcoder dsi_trans;
1029         u32 hs_tx_timeout, lp_rx_timeout, ta_timeout, divisor, mul;
1030
1031         /*
1032          * escape clock count calculation:
1033          * BYTE_CLK_COUNT = TIME_NS/(8 * UI)
1034          * UI (nsec) = (10^6)/Bitrate
1035          * TIME_NS = (BYTE_CLK_COUNT * 8 * 10^6)/ Bitrate
1036          * ESCAPE_CLK_COUNT  = TIME_NS/ESC_CLK_NS
1037          */
1038         divisor = intel_dsi_tlpx_ns(intel_dsi) * afe_clk(encoder, crtc_state) * 1000;
1039         mul = 8 * 1000000;
1040         hs_tx_timeout = DIV_ROUND_UP(intel_dsi->hs_tx_timeout * mul,
1041                                      divisor);
1042         lp_rx_timeout = DIV_ROUND_UP(intel_dsi->lp_rx_timeout * mul, divisor);
1043         ta_timeout = DIV_ROUND_UP(intel_dsi->turn_arnd_val * mul, divisor);
1044
1045         for_each_dsi_port(port, intel_dsi->ports) {
1046                 dsi_trans = dsi_port_to_transcoder(port);
1047
1048                 /* program hst_tx_timeout */
1049                 intel_de_rmw(dev_priv, DSI_HSTX_TO(dsi_trans),
1050                              HSTX_TIMEOUT_VALUE_MASK,
1051                              HSTX_TIMEOUT_VALUE(hs_tx_timeout));
1052
1053                 /* FIXME: DSI_CALIB_TO */
1054
1055                 /* program lp_rx_host timeout */
1056                 intel_de_rmw(dev_priv, DSI_LPRX_HOST_TO(dsi_trans),
1057                              LPRX_TIMEOUT_VALUE_MASK,
1058                              LPRX_TIMEOUT_VALUE(lp_rx_timeout));
1059
1060                 /* FIXME: DSI_PWAIT_TO */
1061
1062                 /* program turn around timeout */
1063                 intel_de_rmw(dev_priv, DSI_TA_TO(dsi_trans),
1064                              TA_TIMEOUT_VALUE_MASK,
1065                              TA_TIMEOUT_VALUE(ta_timeout));
1066         }
1067 }
1068
1069 static void gen11_dsi_config_util_pin(struct intel_encoder *encoder,
1070                                       bool enable)
1071 {
1072         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1073         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1074         u32 tmp;
1075
1076         /*
1077          * used as TE i/p for DSI0,
1078          * for dual link/DSI1 TE is from slave DSI1
1079          * through GPIO.
1080          */
1081         if (is_vid_mode(intel_dsi) || (intel_dsi->ports & BIT(PORT_B)))
1082                 return;
1083
1084         tmp = intel_de_read(dev_priv, UTIL_PIN_CTL);
1085
1086         if (enable) {
1087                 tmp |= UTIL_PIN_DIRECTION_INPUT;
1088                 tmp |= UTIL_PIN_ENABLE;
1089         } else {
1090                 tmp &= ~UTIL_PIN_ENABLE;
1091         }
1092         intel_de_write(dev_priv, UTIL_PIN_CTL, tmp);
1093 }
1094
1095 static void
1096 gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
1097                               const struct intel_crtc_state *crtc_state)
1098 {
1099         /* step 4a: power up all lanes of the DDI used by DSI */
1100         gen11_dsi_power_up_lanes(encoder);
1101
1102         /* step 4b: configure lane sequencing of the Combo-PHY transmitters */
1103         gen11_dsi_config_phy_lanes_sequence(encoder);
1104
1105         /* step 4c: configure voltage swing and skew */
1106         gen11_dsi_voltage_swing_program_seq(encoder);
1107
1108         /* setup D-PHY timings */
1109         gen11_dsi_setup_dphy_timings(encoder, crtc_state);
1110
1111         /* enable DDI buffer */
1112         gen11_dsi_enable_ddi_buffer(encoder);
1113
1114         gen11_dsi_gate_clocks(encoder);
1115
1116         gen11_dsi_setup_timings(encoder, crtc_state);
1117
1118         /* Since transcoder is configured to take events from GPIO */
1119         gen11_dsi_config_util_pin(encoder, true);
1120
1121         /* step 4h: setup DSI protocol timeouts */
1122         gen11_dsi_setup_timeouts(encoder, crtc_state);
1123
1124         /* Step (4h, 4i, 4j, 4k): Configure transcoder */
1125         gen11_dsi_configure_transcoder(encoder, crtc_state);
1126 }
1127
1128 static void gen11_dsi_powerup_panel(struct intel_encoder *encoder)
1129 {
1130         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1131         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1132         struct mipi_dsi_device *dsi;
1133         enum port port;
1134         enum transcoder dsi_trans;
1135         u32 tmp;
1136         int ret;
1137
1138         /* set maximum return packet size */
1139         for_each_dsi_port(port, intel_dsi->ports) {
1140                 dsi_trans = dsi_port_to_transcoder(port);
1141
1142                 /*
1143                  * FIXME: This uses the number of DW's currently in the payload
1144                  * receive queue. This is probably not what we want here.
1145                  */
1146                 tmp = intel_de_read(dev_priv, DSI_CMD_RXCTL(dsi_trans));
1147                 tmp &= NUMBER_RX_PLOAD_DW_MASK;
1148                 /* multiply "Number Rx Payload DW" by 4 to get max value */
1149                 tmp = tmp * 4;
1150                 dsi = intel_dsi->dsi_hosts[port]->device;
1151                 ret = mipi_dsi_set_maximum_return_packet_size(dsi, tmp);
1152                 if (ret < 0)
1153                         drm_err(&dev_priv->drm,
1154                                 "error setting max return pkt size%d\n", tmp);
1155         }
1156
1157         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_INIT_OTP);
1158
1159         /* ensure all panel commands dispatched before enabling transcoder */
1160         wait_for_cmds_dispatched_to_panel(encoder);
1161 }
1162
1163 static void gen11_dsi_pre_pll_enable(struct intel_atomic_state *state,
1164                                      struct intel_encoder *encoder,
1165                                      const struct intel_crtc_state *crtc_state,
1166                                      const struct drm_connector_state *conn_state)
1167 {
1168         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1169
1170         intel_dsi_wait_panel_power_cycle(intel_dsi);
1171
1172         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
1173         msleep(intel_dsi->panel_on_delay);
1174         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
1175
1176         /* step2: enable IO power */
1177         gen11_dsi_enable_io_power(encoder);
1178
1179         /* step3: enable DSI PLL */
1180         gen11_dsi_program_esc_clk_div(encoder, crtc_state);
1181 }
1182
1183 static void gen11_dsi_pre_enable(struct intel_atomic_state *state,
1184                                  struct intel_encoder *encoder,
1185                                  const struct intel_crtc_state *pipe_config,
1186                                  const struct drm_connector_state *conn_state)
1187 {
1188         /* step3b */
1189         gen11_dsi_map_pll(encoder, pipe_config);
1190
1191         /* step4: enable DSI port and DPHY */
1192         gen11_dsi_enable_port_and_phy(encoder, pipe_config);
1193
1194         /* step5: program and powerup panel */
1195         gen11_dsi_powerup_panel(encoder);
1196
1197         intel_dsc_dsi_pps_write(encoder, pipe_config);
1198
1199         /* step6c: configure transcoder timings */
1200         gen11_dsi_set_transcoder_timings(encoder, pipe_config);
1201 }
1202
1203 /*
1204  * Wa_1409054076:icl,jsl,ehl
1205  * When pipe A is disabled and MIPI DSI is enabled on pipe B,
1206  * the AMT KVMR feature will incorrectly see pipe A as enabled.
1207  * Set 0x42080 bit 23=1 before enabling DSI on pipe B and leave
1208  * it set while DSI is enabled on pipe B
1209  */
1210 static void icl_apply_kvmr_pipe_a_wa(struct intel_encoder *encoder,
1211                                      enum pipe pipe, bool enable)
1212 {
1213         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1214
1215         if (DISPLAY_VER(dev_priv) == 11 && pipe == PIPE_B)
1216                 intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
1217                              IGNORE_KVMR_PIPE_A,
1218                              enable ? IGNORE_KVMR_PIPE_A : 0);
1219 }
1220
1221 /*
1222  * Wa_16012360555:adl-p
1223  * SW will have to program the "LP to HS Wakeup Guardband"
1224  * to account for the repeaters on the HS Request/Ready
1225  * PPI signaling between the Display engine and the DPHY.
1226  */
1227 static void adlp_set_lp_hs_wakeup_gb(struct intel_encoder *encoder)
1228 {
1229         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
1230         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1231         enum port port;
1232
1233         if (DISPLAY_VER(i915) == 13) {
1234                 for_each_dsi_port(port, intel_dsi->ports)
1235                         intel_de_rmw(i915, TGL_DSI_CHKN_REG(port),
1236                                      TGL_DSI_CHKN_LSHS_GB_MASK,
1237                                      TGL_DSI_CHKN_LSHS_GB(4));
1238         }
1239 }
1240
1241 static void gen11_dsi_enable(struct intel_atomic_state *state,
1242                              struct intel_encoder *encoder,
1243                              const struct intel_crtc_state *crtc_state,
1244                              const struct drm_connector_state *conn_state)
1245 {
1246         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1247         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
1248
1249         /* Wa_1409054076:icl,jsl,ehl */
1250         icl_apply_kvmr_pipe_a_wa(encoder, crtc->pipe, true);
1251
1252         /* Wa_16012360555:adl-p */
1253         adlp_set_lp_hs_wakeup_gb(encoder);
1254
1255         /* step6d: enable dsi transcoder */
1256         gen11_dsi_enable_transcoder(encoder);
1257
1258         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
1259
1260         /* step7: enable backlight */
1261         intel_backlight_enable(crtc_state, conn_state);
1262         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_ON);
1263
1264         intel_crtc_vblank_on(crtc_state);
1265 }
1266
1267 static void gen11_dsi_disable_transcoder(struct intel_encoder *encoder)
1268 {
1269         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1270         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1271         enum port port;
1272         enum transcoder dsi_trans;
1273
1274         for_each_dsi_port(port, intel_dsi->ports) {
1275                 dsi_trans = dsi_port_to_transcoder(port);
1276
1277                 /* disable transcoder */
1278                 intel_de_rmw(dev_priv, TRANSCONF(dsi_trans), TRANSCONF_ENABLE, 0);
1279
1280                 /* wait for transcoder to be disabled */
1281                 if (intel_de_wait_for_clear(dev_priv, TRANSCONF(dsi_trans),
1282                                             TRANSCONF_STATE_ENABLE, 50))
1283                         drm_err(&dev_priv->drm,
1284                                 "DSI trancoder not disabled\n");
1285         }
1286 }
1287
1288 static void gen11_dsi_powerdown_panel(struct intel_encoder *encoder)
1289 {
1290         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1291
1292         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_OFF);
1293
1294         /* ensure cmds dispatched to panel */
1295         wait_for_cmds_dispatched_to_panel(encoder);
1296 }
1297
1298 static void gen11_dsi_deconfigure_trancoder(struct intel_encoder *encoder)
1299 {
1300         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1301         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1302         enum port port;
1303         enum transcoder dsi_trans;
1304         u32 tmp;
1305
1306         /* disable periodic update mode */
1307         if (is_cmd_mode(intel_dsi)) {
1308                 for_each_dsi_port(port, intel_dsi->ports)
1309                         intel_de_rmw(dev_priv, DSI_CMD_FRMCTL(port),
1310                                      DSI_PERIODIC_FRAME_UPDATE_ENABLE, 0);
1311         }
1312
1313         /* put dsi link in ULPS */
1314         for_each_dsi_port(port, intel_dsi->ports) {
1315                 dsi_trans = dsi_port_to_transcoder(port);
1316                 tmp = intel_de_read(dev_priv, DSI_LP_MSG(dsi_trans));
1317                 tmp |= LINK_ENTER_ULPS;
1318                 tmp &= ~LINK_ULPS_TYPE_LP11;
1319                 intel_de_write(dev_priv, DSI_LP_MSG(dsi_trans), tmp);
1320
1321                 if (wait_for_us((intel_de_read(dev_priv, DSI_LP_MSG(dsi_trans)) &
1322                                  LINK_IN_ULPS),
1323                                 10))
1324                         drm_err(&dev_priv->drm, "DSI link not in ULPS\n");
1325         }
1326
1327         /* disable ddi function */
1328         for_each_dsi_port(port, intel_dsi->ports) {
1329                 dsi_trans = dsi_port_to_transcoder(port);
1330                 intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(dsi_trans),
1331                              TRANS_DDI_FUNC_ENABLE, 0);
1332         }
1333
1334         /* disable port sync mode if dual link */
1335         if (intel_dsi->dual_link) {
1336                 for_each_dsi_port(port, intel_dsi->ports) {
1337                         dsi_trans = dsi_port_to_transcoder(port);
1338                         intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL2(dsi_trans),
1339                                      PORT_SYNC_MODE_ENABLE, 0);
1340                 }
1341         }
1342 }
1343
1344 static void gen11_dsi_disable_port(struct intel_encoder *encoder)
1345 {
1346         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1347         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1348         enum port port;
1349
1350         gen11_dsi_ungate_clocks(encoder);
1351         for_each_dsi_port(port, intel_dsi->ports) {
1352                 intel_de_rmw(dev_priv, DDI_BUF_CTL(port), DDI_BUF_CTL_ENABLE, 0);
1353
1354                 if (wait_for_us((intel_de_read(dev_priv, DDI_BUF_CTL(port)) &
1355                                  DDI_BUF_IS_IDLE),
1356                                  8))
1357                         drm_err(&dev_priv->drm,
1358                                 "DDI port:%c buffer not idle\n",
1359                                 port_name(port));
1360         }
1361         gen11_dsi_gate_clocks(encoder);
1362 }
1363
1364 static void gen11_dsi_disable_io_power(struct intel_encoder *encoder)
1365 {
1366         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1367         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1368         enum port port;
1369
1370         for_each_dsi_port(port, intel_dsi->ports) {
1371                 intel_wakeref_t wakeref;
1372
1373                 wakeref = fetch_and_zero(&intel_dsi->io_wakeref[port]);
1374                 intel_display_power_put(dev_priv,
1375                                         port == PORT_A ?
1376                                         POWER_DOMAIN_PORT_DDI_IO_A :
1377                                         POWER_DOMAIN_PORT_DDI_IO_B,
1378                                         wakeref);
1379         }
1380
1381         /* set mode to DDI */
1382         for_each_dsi_port(port, intel_dsi->ports)
1383                 intel_de_rmw(dev_priv, ICL_DSI_IO_MODECTL(port),
1384                              COMBO_PHY_MODE_DSI, 0);
1385 }
1386
1387 static void gen11_dsi_disable(struct intel_atomic_state *state,
1388                               struct intel_encoder *encoder,
1389                               const struct intel_crtc_state *old_crtc_state,
1390                               const struct drm_connector_state *old_conn_state)
1391 {
1392         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1393
1394         /* step1: turn off backlight */
1395         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_OFF);
1396         intel_backlight_disable(old_conn_state);
1397 }
1398
1399 static void gen11_dsi_post_disable(struct intel_atomic_state *state,
1400                                    struct intel_encoder *encoder,
1401                                    const struct intel_crtc_state *old_crtc_state,
1402                                    const struct drm_connector_state *old_conn_state)
1403 {
1404         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1405         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
1406
1407         intel_crtc_vblank_off(old_crtc_state);
1408
1409         /* step2d,e: disable transcoder and wait */
1410         gen11_dsi_disable_transcoder(encoder);
1411
1412         /* Wa_1409054076:icl,jsl,ehl */
1413         icl_apply_kvmr_pipe_a_wa(encoder, crtc->pipe, false);
1414
1415         /* step2f,g: powerdown panel */
1416         gen11_dsi_powerdown_panel(encoder);
1417
1418         /* step2h,i,j: deconfig trancoder */
1419         gen11_dsi_deconfigure_trancoder(encoder);
1420
1421         intel_dsc_disable(old_crtc_state);
1422         skl_scaler_disable(old_crtc_state);
1423
1424         /* step3: disable port */
1425         gen11_dsi_disable_port(encoder);
1426
1427         gen11_dsi_config_util_pin(encoder, false);
1428
1429         /* step4: disable IO power */
1430         gen11_dsi_disable_io_power(encoder);
1431
1432         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);
1433
1434         msleep(intel_dsi->panel_off_delay);
1435         intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
1436
1437         intel_dsi->panel_power_off_time = ktime_get_boottime();
1438 }
1439
1440 static enum drm_mode_status gen11_dsi_mode_valid(struct drm_connector *connector,
1441                                                  struct drm_display_mode *mode)
1442 {
1443         /* FIXME: DSC? */
1444         return intel_dsi_mode_valid(connector, mode);
1445 }
1446
1447 static void gen11_dsi_get_timings(struct intel_encoder *encoder,
1448                                   struct intel_crtc_state *pipe_config)
1449 {
1450         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1451         struct drm_display_mode *adjusted_mode =
1452                                         &pipe_config->hw.adjusted_mode;
1453
1454         if (pipe_config->dsc.compressed_bpp) {
1455                 int div = pipe_config->dsc.compressed_bpp;
1456                 int mul = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
1457
1458                 adjusted_mode->crtc_htotal =
1459                         DIV_ROUND_UP(adjusted_mode->crtc_htotal * mul, div);
1460                 adjusted_mode->crtc_hsync_start =
1461                         DIV_ROUND_UP(adjusted_mode->crtc_hsync_start * mul, div);
1462                 adjusted_mode->crtc_hsync_end =
1463                         DIV_ROUND_UP(adjusted_mode->crtc_hsync_end * mul, div);
1464         }
1465
1466         if (intel_dsi->dual_link) {
1467                 adjusted_mode->crtc_hdisplay *= 2;
1468                 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
1469                         adjusted_mode->crtc_hdisplay -=
1470                                                 intel_dsi->pixel_overlap;
1471                 adjusted_mode->crtc_htotal *= 2;
1472         }
1473         adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hdisplay;
1474         adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal;
1475
1476         if (intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE) {
1477                 if (intel_dsi->dual_link) {
1478                         adjusted_mode->crtc_hsync_start *= 2;
1479                         adjusted_mode->crtc_hsync_end *= 2;
1480                 }
1481         }
1482         adjusted_mode->crtc_vblank_start = adjusted_mode->crtc_vdisplay;
1483         adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
1484 }
1485
1486 static bool gen11_dsi_is_periodic_cmd_mode(struct intel_dsi *intel_dsi)
1487 {
1488         struct drm_device *dev = intel_dsi->base.base.dev;
1489         struct drm_i915_private *dev_priv = to_i915(dev);
1490         enum transcoder dsi_trans;
1491         u32 val;
1492
1493         if (intel_dsi->ports == BIT(PORT_B))
1494                 dsi_trans = TRANSCODER_DSI_1;
1495         else
1496                 dsi_trans = TRANSCODER_DSI_0;
1497
1498         val = intel_de_read(dev_priv, DSI_TRANS_FUNC_CONF(dsi_trans));
1499         return (val & DSI_PERIODIC_FRAME_UPDATE_ENABLE);
1500 }
1501
1502 static void gen11_dsi_get_cmd_mode_config(struct intel_dsi *intel_dsi,
1503                                           struct intel_crtc_state *pipe_config)
1504 {
1505         if (intel_dsi->ports == (BIT(PORT_B) | BIT(PORT_A)))
1506                 pipe_config->mode_flags |= I915_MODE_FLAG_DSI_USE_TE1 |
1507                                             I915_MODE_FLAG_DSI_USE_TE0;
1508         else if (intel_dsi->ports == BIT(PORT_B))
1509                 pipe_config->mode_flags |= I915_MODE_FLAG_DSI_USE_TE1;
1510         else
1511                 pipe_config->mode_flags |= I915_MODE_FLAG_DSI_USE_TE0;
1512 }
1513
1514 static void gen11_dsi_get_config(struct intel_encoder *encoder,
1515                                  struct intel_crtc_state *pipe_config)
1516 {
1517         struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
1518         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1519
1520         intel_ddi_get_clock(encoder, pipe_config, icl_ddi_combo_get_pll(encoder));
1521
1522         pipe_config->hw.adjusted_mode.crtc_clock = intel_dsi->pclk;
1523         if (intel_dsi->dual_link)
1524                 pipe_config->hw.adjusted_mode.crtc_clock *= 2;
1525
1526         gen11_dsi_get_timings(encoder, pipe_config);
1527         pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
1528         pipe_config->pipe_bpp = bdw_get_pipe_misc_bpp(crtc);
1529
1530         /* Get the details on which TE should be enabled */
1531         if (is_cmd_mode(intel_dsi))
1532                 gen11_dsi_get_cmd_mode_config(intel_dsi, pipe_config);
1533
1534         if (gen11_dsi_is_periodic_cmd_mode(intel_dsi))
1535                 pipe_config->mode_flags |= I915_MODE_FLAG_DSI_PERIODIC_CMD_MODE;
1536 }
1537
1538 static void gen11_dsi_sync_state(struct intel_encoder *encoder,
1539                                  const struct intel_crtc_state *crtc_state)
1540 {
1541         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1542         struct intel_crtc *intel_crtc;
1543         enum pipe pipe;
1544
1545         if (!crtc_state)
1546                 return;
1547
1548         intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
1549         pipe = intel_crtc->pipe;
1550
1551         /* wa verify 1409054076:icl,jsl,ehl */
1552         if (DISPLAY_VER(dev_priv) == 11 && pipe == PIPE_B &&
1553             !(intel_de_read(dev_priv, CHICKEN_PAR1_1) & IGNORE_KVMR_PIPE_A))
1554                 drm_dbg_kms(&dev_priv->drm,
1555                             "[ENCODER:%d:%s] BIOS left IGNORE_KVMR_PIPE_A cleared with pipe B enabled\n",
1556                             encoder->base.base.id,
1557                             encoder->base.name);
1558 }
1559
1560 static int gen11_dsi_dsc_compute_config(struct intel_encoder *encoder,
1561                                         struct intel_crtc_state *crtc_state)
1562 {
1563         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1564         struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
1565         int dsc_max_bpc = DISPLAY_VER(dev_priv) >= 12 ? 12 : 10;
1566         bool use_dsc;
1567         int ret;
1568
1569         use_dsc = intel_bios_get_dsc_params(encoder, crtc_state, dsc_max_bpc);
1570         if (!use_dsc)
1571                 return 0;
1572
1573         if (crtc_state->pipe_bpp < 8 * 3)
1574                 return -EINVAL;
1575
1576         /* FIXME: split only when necessary */
1577         if (crtc_state->dsc.slice_count > 1)
1578                 crtc_state->dsc.dsc_split = true;
1579
1580         /* FIXME: initialize from VBT */
1581         vdsc_cfg->rc_model_size = DSC_RC_MODEL_SIZE_CONST;
1582
1583         vdsc_cfg->pic_height = crtc_state->hw.adjusted_mode.crtc_vdisplay;
1584
1585         ret = intel_dsc_compute_params(crtc_state);
1586         if (ret)
1587                 return ret;
1588
1589         /* DSI specific sanity checks on the common code */
1590         drm_WARN_ON(&dev_priv->drm, vdsc_cfg->vbr_enable);
1591         drm_WARN_ON(&dev_priv->drm, vdsc_cfg->simple_422);
1592         drm_WARN_ON(&dev_priv->drm,
1593                     vdsc_cfg->pic_width % vdsc_cfg->slice_width);
1594         drm_WARN_ON(&dev_priv->drm, vdsc_cfg->slice_height < 8);
1595         drm_WARN_ON(&dev_priv->drm,
1596                     vdsc_cfg->pic_height % vdsc_cfg->slice_height);
1597
1598         ret = drm_dsc_compute_rc_parameters(vdsc_cfg);
1599         if (ret)
1600                 return ret;
1601
1602         crtc_state->dsc.compression_enable = true;
1603
1604         return 0;
1605 }
1606
1607 static int gen11_dsi_compute_config(struct intel_encoder *encoder,
1608                                     struct intel_crtc_state *pipe_config,
1609                                     struct drm_connector_state *conn_state)
1610 {
1611         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
1612         struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi,
1613                                                    base);
1614         struct intel_connector *intel_connector = intel_dsi->attached_connector;
1615         struct drm_display_mode *adjusted_mode =
1616                 &pipe_config->hw.adjusted_mode;
1617         int ret;
1618
1619         pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
1620         pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
1621
1622         ret = intel_panel_compute_config(intel_connector, adjusted_mode);
1623         if (ret)
1624                 return ret;
1625
1626         ret = intel_panel_fitting(pipe_config, conn_state);
1627         if (ret)
1628                 return ret;
1629
1630         adjusted_mode->flags = 0;
1631
1632         /* Dual link goes to trancoder DSI'0' */
1633         if (intel_dsi->ports == BIT(PORT_B))
1634                 pipe_config->cpu_transcoder = TRANSCODER_DSI_1;
1635         else
1636                 pipe_config->cpu_transcoder = TRANSCODER_DSI_0;
1637
1638         if (intel_dsi->pixel_format == MIPI_DSI_FMT_RGB888)
1639                 pipe_config->pipe_bpp = 24;
1640         else
1641                 pipe_config->pipe_bpp = 18;
1642
1643         pipe_config->clock_set = true;
1644
1645         if (gen11_dsi_dsc_compute_config(encoder, pipe_config))
1646                 drm_dbg_kms(&i915->drm, "Attempting to use DSC failed\n");
1647
1648         pipe_config->port_clock = afe_clk(encoder, pipe_config) / 5;
1649
1650         /*
1651          * In case of TE GATE cmd mode, we
1652          * receive TE from the slave if
1653          * dual link is enabled
1654          */
1655         if (is_cmd_mode(intel_dsi))
1656                 gen11_dsi_get_cmd_mode_config(intel_dsi, pipe_config);
1657
1658         return 0;
1659 }
1660
1661 static void gen11_dsi_get_power_domains(struct intel_encoder *encoder,
1662                                         struct intel_crtc_state *crtc_state)
1663 {
1664         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
1665
1666         get_dsi_io_power_domains(i915,
1667                                  enc_to_intel_dsi(encoder));
1668 }
1669
1670 static bool gen11_dsi_get_hw_state(struct intel_encoder *encoder,
1671                                    enum pipe *pipe)
1672 {
1673         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1674         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1675         enum transcoder dsi_trans;
1676         intel_wakeref_t wakeref;
1677         enum port port;
1678         bool ret = false;
1679         u32 tmp;
1680
1681         wakeref = intel_display_power_get_if_enabled(dev_priv,
1682                                                      encoder->power_domain);
1683         if (!wakeref)
1684                 return false;
1685
1686         for_each_dsi_port(port, intel_dsi->ports) {
1687                 dsi_trans = dsi_port_to_transcoder(port);
1688                 tmp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(dsi_trans));
1689                 switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
1690                 case TRANS_DDI_EDP_INPUT_A_ON:
1691                         *pipe = PIPE_A;
1692                         break;
1693                 case TRANS_DDI_EDP_INPUT_B_ONOFF:
1694                         *pipe = PIPE_B;
1695                         break;
1696                 case TRANS_DDI_EDP_INPUT_C_ONOFF:
1697                         *pipe = PIPE_C;
1698                         break;
1699                 case TRANS_DDI_EDP_INPUT_D_ONOFF:
1700                         *pipe = PIPE_D;
1701                         break;
1702                 default:
1703                         drm_err(&dev_priv->drm, "Invalid PIPE input\n");
1704                         goto out;
1705                 }
1706
1707                 tmp = intel_de_read(dev_priv, TRANSCONF(dsi_trans));
1708                 ret = tmp & TRANSCONF_ENABLE;
1709         }
1710 out:
1711         intel_display_power_put(dev_priv, encoder->power_domain, wakeref);
1712         return ret;
1713 }
1714
1715 static bool gen11_dsi_initial_fastset_check(struct intel_encoder *encoder,
1716                                             struct intel_crtc_state *crtc_state)
1717 {
1718         if (crtc_state->dsc.compression_enable) {
1719                 drm_dbg_kms(encoder->base.dev, "Forcing full modeset due to DSC being enabled\n");
1720                 crtc_state->uapi.mode_changed = true;
1721
1722                 return false;
1723         }
1724
1725         return true;
1726 }
1727
1728 static void gen11_dsi_encoder_destroy(struct drm_encoder *encoder)
1729 {
1730         intel_encoder_destroy(encoder);
1731 }
1732
1733 static const struct drm_encoder_funcs gen11_dsi_encoder_funcs = {
1734         .destroy = gen11_dsi_encoder_destroy,
1735 };
1736
1737 static const struct drm_connector_funcs gen11_dsi_connector_funcs = {
1738         .detect = intel_panel_detect,
1739         .late_register = intel_connector_register,
1740         .early_unregister = intel_connector_unregister,
1741         .destroy = intel_connector_destroy,
1742         .fill_modes = drm_helper_probe_single_connector_modes,
1743         .atomic_get_property = intel_digital_connector_atomic_get_property,
1744         .atomic_set_property = intel_digital_connector_atomic_set_property,
1745         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1746         .atomic_duplicate_state = intel_digital_connector_duplicate_state,
1747 };
1748
1749 static const struct drm_connector_helper_funcs gen11_dsi_connector_helper_funcs = {
1750         .get_modes = intel_dsi_get_modes,
1751         .mode_valid = gen11_dsi_mode_valid,
1752         .atomic_check = intel_digital_connector_atomic_check,
1753 };
1754
1755 static int gen11_dsi_host_attach(struct mipi_dsi_host *host,
1756                                  struct mipi_dsi_device *dsi)
1757 {
1758         return 0;
1759 }
1760
1761 static int gen11_dsi_host_detach(struct mipi_dsi_host *host,
1762                                  struct mipi_dsi_device *dsi)
1763 {
1764         return 0;
1765 }
1766
1767 static ssize_t gen11_dsi_host_transfer(struct mipi_dsi_host *host,
1768                                        const struct mipi_dsi_msg *msg)
1769 {
1770         struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host);
1771         struct mipi_dsi_packet dsi_pkt;
1772         ssize_t ret;
1773         bool enable_lpdt = false;
1774
1775         ret = mipi_dsi_create_packet(&dsi_pkt, msg);
1776         if (ret < 0)
1777                 return ret;
1778
1779         if (msg->flags & MIPI_DSI_MSG_USE_LPM)
1780                 enable_lpdt = true;
1781
1782         /* only long packet contains payload */
1783         if (mipi_dsi_packet_format_is_long(msg->type)) {
1784                 ret = dsi_send_pkt_payld(intel_dsi_host, &dsi_pkt);
1785                 if (ret < 0)
1786                         return ret;
1787         }
1788
1789         /* send packet header */
1790         ret  = dsi_send_pkt_hdr(intel_dsi_host, &dsi_pkt, enable_lpdt);
1791         if (ret < 0)
1792                 return ret;
1793
1794         //TODO: add payload receive code if needed
1795
1796         ret = sizeof(dsi_pkt.header) + dsi_pkt.payload_length;
1797
1798         return ret;
1799 }
1800
1801 static const struct mipi_dsi_host_ops gen11_dsi_host_ops = {
1802         .attach = gen11_dsi_host_attach,
1803         .detach = gen11_dsi_host_detach,
1804         .transfer = gen11_dsi_host_transfer,
1805 };
1806
1807 #define ICL_PREPARE_CNT_MAX     0x7
1808 #define ICL_CLK_ZERO_CNT_MAX    0xf
1809 #define ICL_TRAIL_CNT_MAX       0x7
1810 #define ICL_TCLK_PRE_CNT_MAX    0x3
1811 #define ICL_TCLK_POST_CNT_MAX   0x7
1812 #define ICL_HS_ZERO_CNT_MAX     0xf
1813 #define ICL_EXIT_ZERO_CNT_MAX   0x7
1814
1815 static void icl_dphy_param_init(struct intel_dsi *intel_dsi)
1816 {
1817         struct drm_device *dev = intel_dsi->base.base.dev;
1818         struct drm_i915_private *dev_priv = to_i915(dev);
1819         struct intel_connector *connector = intel_dsi->attached_connector;
1820         struct mipi_config *mipi_config = connector->panel.vbt.dsi.config;
1821         u32 tlpx_ns;
1822         u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
1823         u32 ths_prepare_ns, tclk_trail_ns;
1824         u32 hs_zero_cnt;
1825         u32 tclk_pre_cnt;
1826
1827         tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
1828
1829         tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
1830         ths_prepare_ns = max(mipi_config->ths_prepare,
1831                              mipi_config->tclk_prepare);
1832
1833         /*
1834          * prepare cnt in escape clocks
1835          * this field represents a hexadecimal value with a precision
1836          * of 1.2 – i.e. the most significant bit is the integer
1837          * and the least significant 2 bits are fraction bits.
1838          * so, the field can represent a range of 0.25 to 1.75
1839          */
1840         prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * 4, tlpx_ns);
1841         if (prepare_cnt > ICL_PREPARE_CNT_MAX) {
1842                 drm_dbg_kms(&dev_priv->drm, "prepare_cnt out of range (%d)\n",
1843                             prepare_cnt);
1844                 prepare_cnt = ICL_PREPARE_CNT_MAX;
1845         }
1846
1847         /* clk zero count in escape clocks */
1848         clk_zero_cnt = DIV_ROUND_UP(mipi_config->tclk_prepare_clkzero -
1849                                     ths_prepare_ns, tlpx_ns);
1850         if (clk_zero_cnt > ICL_CLK_ZERO_CNT_MAX) {
1851                 drm_dbg_kms(&dev_priv->drm,
1852                             "clk_zero_cnt out of range (%d)\n", clk_zero_cnt);
1853                 clk_zero_cnt = ICL_CLK_ZERO_CNT_MAX;
1854         }
1855
1856         /* trail cnt in escape clocks*/
1857         trail_cnt = DIV_ROUND_UP(tclk_trail_ns, tlpx_ns);
1858         if (trail_cnt > ICL_TRAIL_CNT_MAX) {
1859                 drm_dbg_kms(&dev_priv->drm, "trail_cnt out of range (%d)\n",
1860                             trail_cnt);
1861                 trail_cnt = ICL_TRAIL_CNT_MAX;
1862         }
1863
1864         /* tclk pre count in escape clocks */
1865         tclk_pre_cnt = DIV_ROUND_UP(mipi_config->tclk_pre, tlpx_ns);
1866         if (tclk_pre_cnt > ICL_TCLK_PRE_CNT_MAX) {
1867                 drm_dbg_kms(&dev_priv->drm,
1868                             "tclk_pre_cnt out of range (%d)\n", tclk_pre_cnt);
1869                 tclk_pre_cnt = ICL_TCLK_PRE_CNT_MAX;
1870         }
1871
1872         /* hs zero cnt in escape clocks */
1873         hs_zero_cnt = DIV_ROUND_UP(mipi_config->ths_prepare_hszero -
1874                                    ths_prepare_ns, tlpx_ns);
1875         if (hs_zero_cnt > ICL_HS_ZERO_CNT_MAX) {
1876                 drm_dbg_kms(&dev_priv->drm, "hs_zero_cnt out of range (%d)\n",
1877                             hs_zero_cnt);
1878                 hs_zero_cnt = ICL_HS_ZERO_CNT_MAX;
1879         }
1880
1881         /* hs exit zero cnt in escape clocks */
1882         exit_zero_cnt = DIV_ROUND_UP(mipi_config->ths_exit, tlpx_ns);
1883         if (exit_zero_cnt > ICL_EXIT_ZERO_CNT_MAX) {
1884                 drm_dbg_kms(&dev_priv->drm,
1885                             "exit_zero_cnt out of range (%d)\n",
1886                             exit_zero_cnt);
1887                 exit_zero_cnt = ICL_EXIT_ZERO_CNT_MAX;
1888         }
1889
1890         /* clock lane dphy timings */
1891         intel_dsi->dphy_reg = (CLK_PREPARE_OVERRIDE |
1892                                CLK_PREPARE(prepare_cnt) |
1893                                CLK_ZERO_OVERRIDE |
1894                                CLK_ZERO(clk_zero_cnt) |
1895                                CLK_PRE_OVERRIDE |
1896                                CLK_PRE(tclk_pre_cnt) |
1897                                CLK_TRAIL_OVERRIDE |
1898                                CLK_TRAIL(trail_cnt));
1899
1900         /* data lanes dphy timings */
1901         intel_dsi->dphy_data_lane_reg = (HS_PREPARE_OVERRIDE |
1902                                          HS_PREPARE(prepare_cnt) |
1903                                          HS_ZERO_OVERRIDE |
1904                                          HS_ZERO(hs_zero_cnt) |
1905                                          HS_TRAIL_OVERRIDE |
1906                                          HS_TRAIL(trail_cnt) |
1907                                          HS_EXIT_OVERRIDE |
1908                                          HS_EXIT(exit_zero_cnt));
1909
1910         intel_dsi_log_params(intel_dsi);
1911 }
1912
1913 static void icl_dsi_add_properties(struct intel_connector *connector)
1914 {
1915         const struct drm_display_mode *fixed_mode =
1916                 intel_panel_preferred_fixed_mode(connector);
1917
1918         intel_attach_scaling_mode_property(&connector->base);
1919
1920         drm_connector_set_panel_orientation_with_quirk(&connector->base,
1921                                                        intel_dsi_get_panel_orientation(connector),
1922                                                        fixed_mode->hdisplay,
1923                                                        fixed_mode->vdisplay);
1924 }
1925
1926 void icl_dsi_init(struct drm_i915_private *dev_priv,
1927                   const struct intel_bios_encoder_data *devdata)
1928 {
1929         struct intel_dsi *intel_dsi;
1930         struct intel_encoder *encoder;
1931         struct intel_connector *intel_connector;
1932         struct drm_connector *connector;
1933         enum port port;
1934
1935         port = intel_bios_encoder_port(devdata);
1936         if (port == PORT_NONE)
1937                 return;
1938
1939         intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL);
1940         if (!intel_dsi)
1941                 return;
1942
1943         intel_connector = intel_connector_alloc();
1944         if (!intel_connector) {
1945                 kfree(intel_dsi);
1946                 return;
1947         }
1948
1949         encoder = &intel_dsi->base;
1950         intel_dsi->attached_connector = intel_connector;
1951         connector = &intel_connector->base;
1952
1953         encoder->devdata = devdata;
1954
1955         /* register DSI encoder with DRM subsystem */
1956         drm_encoder_init(&dev_priv->drm, &encoder->base, &gen11_dsi_encoder_funcs,
1957                          DRM_MODE_ENCODER_DSI, "DSI %c", port_name(port));
1958
1959         encoder->pre_pll_enable = gen11_dsi_pre_pll_enable;
1960         encoder->pre_enable = gen11_dsi_pre_enable;
1961         encoder->enable = gen11_dsi_enable;
1962         encoder->disable = gen11_dsi_disable;
1963         encoder->post_disable = gen11_dsi_post_disable;
1964         encoder->port = port;
1965         encoder->get_config = gen11_dsi_get_config;
1966         encoder->sync_state = gen11_dsi_sync_state;
1967         encoder->update_pipe = intel_backlight_update;
1968         encoder->compute_config = gen11_dsi_compute_config;
1969         encoder->get_hw_state = gen11_dsi_get_hw_state;
1970         encoder->initial_fastset_check = gen11_dsi_initial_fastset_check;
1971         encoder->type = INTEL_OUTPUT_DSI;
1972         encoder->cloneable = 0;
1973         encoder->pipe_mask = ~0;
1974         encoder->power_domain = POWER_DOMAIN_PORT_DSI;
1975         encoder->get_power_domains = gen11_dsi_get_power_domains;
1976         encoder->disable_clock = gen11_dsi_gate_clocks;
1977         encoder->is_clock_enabled = gen11_dsi_is_clock_enabled;
1978         encoder->shutdown = intel_dsi_shutdown;
1979
1980         /* register DSI connector with DRM subsystem */
1981         drm_connector_init(&dev_priv->drm, connector, &gen11_dsi_connector_funcs,
1982                            DRM_MODE_CONNECTOR_DSI);
1983         drm_connector_helper_add(connector, &gen11_dsi_connector_helper_funcs);
1984         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
1985         intel_connector->get_hw_state = intel_connector_get_hw_state;
1986
1987         /* attach connector to encoder */
1988         intel_connector_attach_encoder(intel_connector, encoder);
1989
1990         intel_dsi->panel_power_off_time = ktime_get_boottime();
1991
1992         intel_bios_init_panel_late(dev_priv, &intel_connector->panel, encoder->devdata, NULL);
1993
1994         mutex_lock(&dev_priv->drm.mode_config.mutex);
1995         intel_panel_add_vbt_lfp_fixed_mode(intel_connector);
1996         mutex_unlock(&dev_priv->drm.mode_config.mutex);
1997
1998         if (!intel_panel_preferred_fixed_mode(intel_connector)) {
1999                 drm_err(&dev_priv->drm, "DSI fixed mode info missing\n");
2000                 goto err;
2001         }
2002
2003         intel_panel_init(intel_connector, NULL);
2004
2005         intel_backlight_setup(intel_connector, INVALID_PIPE);
2006
2007         if (intel_connector->panel.vbt.dsi.config->dual_link)
2008                 intel_dsi->ports = BIT(PORT_A) | BIT(PORT_B);
2009         else
2010                 intel_dsi->ports = BIT(port);
2011
2012         if (drm_WARN_ON(&dev_priv->drm, intel_connector->panel.vbt.dsi.bl_ports & ~intel_dsi->ports))
2013                 intel_connector->panel.vbt.dsi.bl_ports &= intel_dsi->ports;
2014
2015         if (drm_WARN_ON(&dev_priv->drm, intel_connector->panel.vbt.dsi.cabc_ports & ~intel_dsi->ports))
2016                 intel_connector->panel.vbt.dsi.cabc_ports &= intel_dsi->ports;
2017
2018         for_each_dsi_port(port, intel_dsi->ports) {
2019                 struct intel_dsi_host *host;
2020
2021                 host = intel_dsi_host_init(intel_dsi, &gen11_dsi_host_ops, port);
2022                 if (!host)
2023                         goto err;
2024
2025                 intel_dsi->dsi_hosts[port] = host;
2026         }
2027
2028         if (!intel_dsi_vbt_init(intel_dsi, MIPI_DSI_GENERIC_PANEL_ID)) {
2029                 drm_dbg_kms(&dev_priv->drm, "no device found\n");
2030                 goto err;
2031         }
2032
2033         icl_dphy_param_init(intel_dsi);
2034
2035         icl_dsi_add_properties(intel_connector);
2036         return;
2037
2038 err:
2039         drm_connector_cleanup(connector);
2040         drm_encoder_cleanup(&encoder->base);
2041         kfree(intel_dsi);
2042         kfree(intel_connector);
2043 }