drivers/gpu/drm/i915/intel_dsi.c

   1 /*
   2  * Copyright © 2013 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  * Author: Jani Nikula <jani.nikula@intel.com>
  24  */
  25
  26 #include <drm/drmP.h>
  27 #include <drm/drm_atomic_helper.h>
  28 #include <drm/drm_crtc.h>
  29 #include <drm/drm_edid.h>
  30 #include <drm/i915_drm.h>
  31 #include <drm/drm_panel.h>
  32 #include <drm/drm_mipi_dsi.h>
  33 #include <linux/slab.h>
  34 #include <linux/gpio/consumer.h>
  35 #include "i915_drv.h"
  36 #include "intel_drv.h"
  37 #include "intel_dsi.h"
  38
  39 static const struct {
  40         u16 panel_id;
  41         struct drm_panel * (*init)(struct intel_dsi *intel_dsi, u16 panel_id);
  42 } intel_dsi_drivers[] = {
  43         {
  44                 .panel_id = MIPI_DSI_GENERIC_PANEL_ID,
  45                 .init = vbt_panel_init,
  46         },
  47 };
  48
  49 static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
  50 {
  51         struct drm_encoder *encoder = &intel_dsi->base.base;
  52         struct drm_device *dev = encoder->dev;
  53         struct drm_i915_private *dev_priv = dev->dev_private;
  54         u32 mask;
  55
  56         mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
  57                 LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
  58
  59         if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & mask) == mask, 100))
  60                 DRM_ERROR("DPI FIFOs are not empty\n");
  61 }
  62
  63 static void write_data(struct drm_i915_private *dev_priv,
  64                        i915_reg_t reg,
  65                        const u8 *data, u32 len)
  66 {
  67         u32 i, j;
  68
  69         for (i = 0; i < len; i += 4) {
  70                 u32 val = 0;
  71
  72                 for (j = 0; j < min_t(u32, len - i, 4); j++)
  73                         val |= *data++ << 8 * j;
  74
  75                 I915_WRITE(reg, val);
  76         }
  77 }
  78
  79 static void read_data(struct drm_i915_private *dev_priv,
  80                       i915_reg_t reg,
  81                       u8 *data, u32 len)
  82 {
  83         u32 i, j;
  84
  85         for (i = 0; i < len; i += 4) {
  86                 u32 val = I915_READ(reg);
  87
  88                 for (j = 0; j < min_t(u32, len - i, 4); j++)
  89                         *data++ = val >> 8 * j;
  90         }
  91 }
  92
  93 static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host,
  94                                        const struct mipi_dsi_msg *msg)
  95 {
  96         struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host);
  97         struct drm_device *dev = intel_dsi_host->intel_dsi->base.base.dev;
  98         struct drm_i915_private *dev_priv = dev->dev_private;
  99         enum port port = intel_dsi_host->port;
 100         struct mipi_dsi_packet packet;
 101         ssize_t ret;
 102         const u8 *header, *data;
 103         i915_reg_t data_reg, ctrl_reg;
 104         u32 data_mask, ctrl_mask;
 105
 106         ret = mipi_dsi_create_packet(&packet, msg);
 107         if (ret < 0)
 108                 return ret;
 109
 110         header = packet.header;
 111         data = packet.payload;
 112
 113         if (msg->flags & MIPI_DSI_MSG_USE_LPM) {
 114                 data_reg = MIPI_LP_GEN_DATA(port);
 115                 data_mask = LP_DATA_FIFO_FULL;
 116                 ctrl_reg = MIPI_LP_GEN_CTRL(port);
 117                 ctrl_mask = LP_CTRL_FIFO_FULL;
 118         } else {
 119                 data_reg = MIPI_HS_GEN_DATA(port);
 120                 data_mask = HS_DATA_FIFO_FULL;
 121                 ctrl_reg = MIPI_HS_GEN_CTRL(port);
 122                 ctrl_mask = HS_CTRL_FIFO_FULL;
 123         }
 124
 125         /* note: this is never true for reads */
 126         if (packet.payload_length) {
 127
 128                 if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & data_mask) == 0, 50))
 129                         DRM_ERROR("Timeout waiting for HS/LP DATA FIFO !full\n");
 130
 131                 write_data(dev_priv, data_reg, packet.payload,
 132                            packet.payload_length);
 133         }
 134
 135         if (msg->rx_len) {
 136                 I915_WRITE(MIPI_INTR_STAT(port), GEN_READ_DATA_AVAIL);
 137         }
 138
 139         if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & ctrl_mask) == 0, 50)) {
 140                 DRM_ERROR("Timeout waiting for HS/LP CTRL FIFO !full\n");
 141         }
 142
 143         I915_WRITE(ctrl_reg, header[2] << 16 | header[1] << 8 | header[0]);
 144
 145         /* ->rx_len is set only for reads */
 146         if (msg->rx_len) {
 147                 data_mask = GEN_READ_DATA_AVAIL;
 148                 if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & data_mask) == data_mask, 50))
 149                         DRM_ERROR("Timeout waiting for read data.\n");
 150
 151                 read_data(dev_priv, data_reg, msg->rx_buf, msg->rx_len);
 152         }
 153
 154         /* XXX: fix for reads and writes */
 155         return 4 + packet.payload_length;
 156 }
 157
 158 static int intel_dsi_host_attach(struct mipi_dsi_host *host,
 159                                  struct mipi_dsi_device *dsi)
 160 {
 161         return 0;
 162 }
 163
 164 static int intel_dsi_host_detach(struct mipi_dsi_host *host,
 165                                  struct mipi_dsi_device *dsi)
 166 {
 167         return 0;
 168 }
 169
 170 static const struct mipi_dsi_host_ops intel_dsi_host_ops = {
 171         .attach = intel_dsi_host_attach,
 172         .detach = intel_dsi_host_detach,
 173         .transfer = intel_dsi_host_transfer,
 174 };
 175
 176 static struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
 177                                                   enum port port)
 178 {
 179         struct intel_dsi_host *host;
 180         struct mipi_dsi_device *device;
 181
 182         host = kzalloc(sizeof(*host), GFP_KERNEL);
 183         if (!host)
 184                 return NULL;
 185
 186         host->base.ops = &intel_dsi_host_ops;
 187         host->intel_dsi = intel_dsi;
 188         host->port = port;
 189
 190         /*
 191          * We should call mipi_dsi_host_register(&host->base) here, but we don't
 192          * have a host->dev, and we don't have OF stuff either. So just use the
 193          * dsi framework as a library and hope for the best. Create the dsi
 194          * devices by ourselves here too. Need to be careful though, because we
 195          * don't initialize any of the driver model devices here.
 196          */
 197         device = kzalloc(sizeof(*device), GFP_KERNEL);
 198         if (!device) {
 199                 kfree(host);
 200                 return NULL;
 201         }
 202
 203         device->host = &host->base;
 204         host->device = device;
 205
 206         return host;
 207 }
 208
 209 /*
 210  * send a video mode command
 211  *
 212  * XXX: commands with data in MIPI_DPI_DATA?
 213  */
 214 static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs,
 215                         enum port port)
 216 {
 217         struct drm_encoder *encoder = &intel_dsi->base.base;
 218         struct drm_device *dev = encoder->dev;
 219         struct drm_i915_private *dev_priv = dev->dev_private;
 220         u32 mask;
 221
 222         /* XXX: pipe, hs */
 223         if (hs)
 224                 cmd &= ~DPI_LP_MODE;
 225         else
 226                 cmd |= DPI_LP_MODE;
 227
 228         /* clear bit */
 229         I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);
 230
 231         /* XXX: old code skips write if control unchanged */
 232         if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
 233                 DRM_ERROR("Same special packet %02x twice in a row.\n", cmd);
 234
 235         I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
 236
 237         mask = SPL_PKT_SENT_INTERRUPT;
 238         if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & mask) == mask, 100))
 239                 DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
 240
 241         return 0;
 242 }
 243
 244 static void band_gap_reset(struct drm_i915_private *dev_priv)
 245 {
 246         mutex_lock(&dev_priv->sb_lock);
 247
 248         vlv_flisdsi_write(dev_priv, 0x08, 0x0001);
 249         vlv_flisdsi_write(dev_priv, 0x0F, 0x0005);
 250         vlv_flisdsi_write(dev_priv, 0x0F, 0x0025);
 251         udelay(150);
 252         vlv_flisdsi_write(dev_priv, 0x0F, 0x0000);
 253         vlv_flisdsi_write(dev_priv, 0x08, 0x0000);
 254
 255         mutex_unlock(&dev_priv->sb_lock);
 256 }
 257
 258 static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
 259 {
 260         return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE;
 261 }
 262
 263 static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
 264 {
 265         return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE;
 266 }
 267
 268 static bool intel_dsi_compute_config(struct intel_encoder *encoder,
 269                                      struct intel_crtc_state *pipe_config)
 270 {
 271         struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi,
 272                                                    base);
 273         struct intel_connector *intel_connector = intel_dsi->attached_connector;
 274         struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
 275         struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
 276
 277         DRM_DEBUG_KMS("\n");
 278
 279         pipe_config->has_dsi_encoder = true;
 280
 281         if (fixed_mode)
 282                 intel_fixed_panel_mode(fixed_mode, adjusted_mode);
 283
 284         /* DSI uses short packets for sync events, so clear mode flags for DSI */
 285         adjusted_mode->flags = 0;
 286
 287         return true;
 288 }
 289
 290 static void bxt_dsi_device_ready(struct intel_encoder *encoder)
 291 {
 292         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 293         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 294         enum port port;
 295         u32 val;
 296
 297         DRM_DEBUG_KMS("\n");
 298
 299         /* Exit Low power state in 4 steps*/
 300         for_each_dsi_port(port, intel_dsi->ports) {
 301
 302                 /* 1. Enable MIPI PHY transparent latch */
 303                 val = I915_READ(BXT_MIPI_PORT_CTRL(port));
 304                 I915_WRITE(BXT_MIPI_PORT_CTRL(port), val | LP_OUTPUT_HOLD);
 305                 usleep_range(2000, 2500);
 306
 307                 /* 2. Enter ULPS */
 308                 val = I915_READ(MIPI_DEVICE_READY(port));
 309                 val &= ~ULPS_STATE_MASK;
 310                 val |= (ULPS_STATE_ENTER | DEVICE_READY);
 311                 I915_WRITE(MIPI_DEVICE_READY(port), val);
 312                 usleep_range(2, 3);
 313
 314                 /* 3. Exit ULPS */
 315                 val = I915_READ(MIPI_DEVICE_READY(port));
 316                 val &= ~ULPS_STATE_MASK;
 317                 val |= (ULPS_STATE_EXIT | DEVICE_READY);
 318                 I915_WRITE(MIPI_DEVICE_READY(port), val);
 319                 usleep_range(1000, 1500);
 320
 321                 /* Clear ULPS and set device ready */
 322                 val = I915_READ(MIPI_DEVICE_READY(port));
 323                 val &= ~ULPS_STATE_MASK;
 324                 val |= DEVICE_READY;
 325                 I915_WRITE(MIPI_DEVICE_READY(port), val);
 326         }
 327 }
 328
 329 static void vlv_dsi_device_ready(struct intel_encoder *encoder)
 330 {
 331         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 332         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 333         enum port port;
 334         u32 val;
 335
 336         DRM_DEBUG_KMS("\n");
 337
 338         mutex_lock(&dev_priv->sb_lock);
 339         /* program rcomp for compliance, reduce from 50 ohms to 45 ohms
 340          * needed everytime after power gate */
 341         vlv_flisdsi_write(dev_priv, 0x04, 0x0004);
 342         mutex_unlock(&dev_priv->sb_lock);
 343
 344         /* bandgap reset is needed after everytime we do power gate */
 345         band_gap_reset(dev_priv);
 346
 347         for_each_dsi_port(port, intel_dsi->ports) {
 348
 349                 I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_ENTER);
 350                 usleep_range(2500, 3000);
 351
 352                 /* Enable MIPI PHY transparent latch
 353                  * Common bit for both MIPI Port A & MIPI Port C
 354                  * No similar bit in MIPI Port C reg
 355                  */
 356                 val = I915_READ(MIPI_PORT_CTRL(PORT_A));
 357                 I915_WRITE(MIPI_PORT_CTRL(PORT_A), val | LP_OUTPUT_HOLD);
 358                 usleep_range(1000, 1500);
 359
 360                 I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_EXIT);
 361                 usleep_range(2500, 3000);
 362
 363                 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY);
 364                 usleep_range(2500, 3000);
 365         }
 366 }
 367
 368 static void intel_dsi_device_ready(struct intel_encoder *encoder)
 369 {
 370         struct drm_device *dev = encoder->base.dev;
 371
 372         if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
 373                 vlv_dsi_device_ready(encoder);
 374         else if (IS_BROXTON(dev))
 375                 bxt_dsi_device_ready(encoder);
 376 }
 377
 378 static void intel_dsi_port_enable(struct intel_encoder *encoder)
 379 {
 380         struct drm_device *dev = encoder->base.dev;
 381         struct drm_i915_private *dev_priv = dev->dev_private;
 382         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 383         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 384         enum port port;
 385
 386         if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
 387                 u32 temp;
 388
 389                 temp = I915_READ(VLV_CHICKEN_3);
 390                 temp &= ~PIXEL_OVERLAP_CNT_MASK |
 391                                         intel_dsi->pixel_overlap <<
 392                                         PIXEL_OVERLAP_CNT_SHIFT;
 393                 I915_WRITE(VLV_CHICKEN_3, temp);
 394         }
 395
 396         for_each_dsi_port(port, intel_dsi->ports) {
 397                 i915_reg_t port_ctrl = IS_BROXTON(dev) ?
 398                         BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
 399                 u32 temp;
 400
 401                 temp = I915_READ(port_ctrl);
 402
 403                 temp &= ~LANE_CONFIGURATION_MASK;
 404                 temp &= ~DUAL_LINK_MODE_MASK;
 405
 406                 if (intel_dsi->ports == ((1 << PORT_A) | (1 << PORT_C))) {
 407                         temp |= (intel_dsi->dual_link - 1)
 408                                                 << DUAL_LINK_MODE_SHIFT;
 409                         temp |= intel_crtc->pipe ?
 410                                         LANE_CONFIGURATION_DUAL_LINK_B :
 411                                         LANE_CONFIGURATION_DUAL_LINK_A;
 412                 }
 413                 /* assert ip_tg_enable signal */
 414                 I915_WRITE(port_ctrl, temp | DPI_ENABLE);
 415                 POSTING_READ(port_ctrl);
 416         }
 417 }
 418
 419 static void intel_dsi_port_disable(struct intel_encoder *encoder)
 420 {
 421         struct drm_device *dev = encoder->base.dev;
 422         struct drm_i915_private *dev_priv = dev->dev_private;
 423         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 424         enum port port;
 425
 426         for_each_dsi_port(port, intel_dsi->ports) {
 427                 i915_reg_t port_ctrl = IS_BROXTON(dev) ?
 428                         BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
 429                 u32 temp;
 430
 431                 /* de-assert ip_tg_enable signal */
 432                 temp = I915_READ(port_ctrl);
 433                 I915_WRITE(port_ctrl, temp & ~DPI_ENABLE);
 434                 POSTING_READ(port_ctrl);
 435         }
 436 }
 437
 438 static void intel_dsi_enable(struct intel_encoder *encoder)
 439 {
 440         struct drm_device *dev = encoder->base.dev;
 441         struct drm_i915_private *dev_priv = dev->dev_private;
 442         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 443         enum port port;
 444
 445         DRM_DEBUG_KMS("\n");
 446
 447         if (is_cmd_mode(intel_dsi)) {
 448                 for_each_dsi_port(port, intel_dsi->ports)
 449                         I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(port), 8 * 4);
 450         } else {
 451                 msleep(20); /* XXX */
 452                 for_each_dsi_port(port, intel_dsi->ports)
 453                         dpi_send_cmd(intel_dsi, TURN_ON, false, port);
 454                 msleep(100);
 455
 456                 drm_panel_enable(intel_dsi->panel);
 457
 458                 for_each_dsi_port(port, intel_dsi->ports)
 459                         wait_for_dsi_fifo_empty(intel_dsi, port);
 460
 461                 intel_dsi_port_enable(encoder);
 462         }
 463
 464         intel_panel_enable_backlight(intel_dsi->attached_connector);
 465 }
 466
 467 static void intel_dsi_prepare(struct intel_encoder *intel_encoder);
 468
 469 static void intel_dsi_pre_enable(struct intel_encoder *encoder)
 470 {
 471         struct drm_device *dev = encoder->base.dev;
 472         struct drm_i915_private *dev_priv = dev->dev_private;
 473         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 474         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 475         enum pipe pipe = intel_crtc->pipe;
 476         enum port port;
 477         u32 tmp;
 478
 479         DRM_DEBUG_KMS("\n");
 480
 481         intel_enable_dsi_pll(encoder);
 482         intel_dsi_prepare(encoder);
 483
 484         /* Panel Enable over CRC PMIC */
 485         if (intel_dsi->gpio_panel)
 486                 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
 487
 488         msleep(intel_dsi->panel_on_delay);
 489
 490         if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
 491                 /*
 492                  * Disable DPOunit clock gating, can stall pipe
 493                  * and we need DPLL REFA always enabled
 494                  */
 495                 tmp = I915_READ(DPLL(pipe));
 496                 tmp |= DPLL_REF_CLK_ENABLE_VLV;
 497                 I915_WRITE(DPLL(pipe), tmp);
 498
 499                 /* update the hw state for DPLL */
 500                 intel_crtc->config->dpll_hw_state.dpll =
 501                                 DPLL_INTEGRATED_REF_CLK_VLV |
 502                                         DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
 503
 504                 tmp = I915_READ(DSPCLK_GATE_D);
 505                 tmp |= DPOUNIT_CLOCK_GATE_DISABLE;
 506                 I915_WRITE(DSPCLK_GATE_D, tmp);
 507         }
 508
 509         /* put device in ready state */
 510         intel_dsi_device_ready(encoder);
 511
 512         drm_panel_prepare(intel_dsi->panel);
 513
 514         for_each_dsi_port(port, intel_dsi->ports)
 515                 wait_for_dsi_fifo_empty(intel_dsi, port);
 516
 517         /* Enable port in pre-enable phase itself because as per hw team
 518          * recommendation, port should be enabled befor plane & pipe */
 519         intel_dsi_enable(encoder);
 520 }
 521
 522 static void intel_dsi_enable_nop(struct intel_encoder *encoder)
 523 {
 524         DRM_DEBUG_KMS("\n");
 525
 526         /* for DSI port enable has to be done before pipe
 527          * and plane enable, so port enable is done in
 528          * pre_enable phase itself unlike other encoders
 529          */
 530 }
 531
 532 static void intel_dsi_pre_disable(struct intel_encoder *encoder)
 533 {
 534         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 535         enum port port;
 536
 537         DRM_DEBUG_KMS("\n");
 538
 539         intel_panel_disable_backlight(intel_dsi->attached_connector);
 540
 541         if (is_vid_mode(intel_dsi)) {
 542                 /* Send Shutdown command to the panel in LP mode */
 543                 for_each_dsi_port(port, intel_dsi->ports)
 544                         dpi_send_cmd(intel_dsi, SHUTDOWN, false, port);
 545                 msleep(10);
 546         }
 547 }
 548
 549 static void intel_dsi_disable(struct intel_encoder *encoder)
 550 {
 551         struct drm_device *dev = encoder->base.dev;
 552         struct drm_i915_private *dev_priv = dev->dev_private;
 553         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 554         enum port port;
 555         u32 temp;
 556
 557         DRM_DEBUG_KMS("\n");
 558
 559         if (is_vid_mode(intel_dsi)) {
 560                 for_each_dsi_port(port, intel_dsi->ports)
 561                         wait_for_dsi_fifo_empty(intel_dsi, port);
 562
 563                 intel_dsi_port_disable(encoder);
 564                 msleep(2);
 565         }
 566
 567         for_each_dsi_port(port, intel_dsi->ports) {
 568                 /* Panel commands can be sent when clock is in LP11 */
 569                 I915_WRITE(MIPI_DEVICE_READY(port), 0x0);
 570
 571                 intel_dsi_reset_clocks(encoder, port);
 572                 I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP);
 573
 574                 temp = I915_READ(MIPI_DSI_FUNC_PRG(port));
 575                 temp &= ~VID_MODE_FORMAT_MASK;
 576                 I915_WRITE(MIPI_DSI_FUNC_PRG(port), temp);
 577
 578                 I915_WRITE(MIPI_DEVICE_READY(port), 0x1);
 579         }
 580         /* if disable packets are sent before sending shutdown packet then in
 581          * some next enable sequence send turn on packet error is observed */
 582         drm_panel_disable(intel_dsi->panel);
 583
 584         for_each_dsi_port(port, intel_dsi->ports)
 585                 wait_for_dsi_fifo_empty(intel_dsi, port);
 586 }
 587
 588 static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
 589 {
 590         struct drm_device *dev = encoder->base.dev;
 591         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 592         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 593         enum port port;
 594
 595         DRM_DEBUG_KMS("\n");
 596         for_each_dsi_port(port, intel_dsi->ports) {
 597                 /* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */
 598                 i915_reg_t port_ctrl = IS_BROXTON(dev) ?
 599                         BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(PORT_A);
 600                 u32 val;
 601
 602                 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
 603                                                         ULPS_STATE_ENTER);
 604                 usleep_range(2000, 2500);
 605
 606                 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
 607                                                         ULPS_STATE_EXIT);
 608                 usleep_range(2000, 2500);
 609
 610                 I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
 611                                                         ULPS_STATE_ENTER);
 612                 usleep_range(2000, 2500);
 613
 614                 /* Wait till Clock lanes are in LP-00 state for MIPI Port A
 615                  * only. MIPI Port C has no similar bit for checking
 616                  */
 617                 if (wait_for(((I915_READ(port_ctrl) & AFE_LATCHOUT)
 618                                                 == 0x00000), 30))
 619                         DRM_ERROR("DSI LP not going Low\n");
 620
 621                 /* Disable MIPI PHY transparent latch */
 622                 val = I915_READ(port_ctrl);
 623                 I915_WRITE(port_ctrl, val & ~LP_OUTPUT_HOLD);
 624                 usleep_range(1000, 1500);
 625
 626                 I915_WRITE(MIPI_DEVICE_READY(port), 0x00);
 627                 usleep_range(2000, 2500);
 628         }
 629
 630         intel_disable_dsi_pll(encoder);
 631 }
 632
 633 static void intel_dsi_post_disable(struct intel_encoder *encoder)
 634 {
 635         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 636         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 637         u32 val;
 638
 639         DRM_DEBUG_KMS("\n");
 640
 641         intel_dsi_disable(encoder);
 642
 643         intel_dsi_clear_device_ready(encoder);
 644
 645         val = I915_READ(DSPCLK_GATE_D);
 646         val &= ~DPOUNIT_CLOCK_GATE_DISABLE;
 647         I915_WRITE(DSPCLK_GATE_D, val);
 648
 649         drm_panel_unprepare(intel_dsi->panel);
 650
 651         msleep(intel_dsi->panel_off_delay);
 652         msleep(intel_dsi->panel_pwr_cycle_delay);
 653
 654         /* Panel Disable over CRC PMIC */
 655         if (intel_dsi->gpio_panel)
 656                 gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
 657 }
 658
 659 static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
 660                                    enum pipe *pipe)
 661 {
 662         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 663         struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 664         struct drm_device *dev = encoder->base.dev;
 665         enum intel_display_power_domain power_domain;
 666         enum port port;
 667
 668         DRM_DEBUG_KMS("\n");
 669
 670         power_domain = intel_display_port_power_domain(encoder);
 671         if (!intel_display_power_is_enabled(dev_priv, power_domain))
 672                 return false;
 673
 674         /* XXX: this only works for one DSI output */
 675         for_each_dsi_port(port, intel_dsi->ports) {
 676                 i915_reg_t ctrl_reg = IS_BROXTON(dev) ?
 677                         BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
 678                 u32 dpi_enabled, func;
 679
 680                 func = I915_READ(MIPI_DSI_FUNC_PRG(port));
 681                 dpi_enabled = I915_READ(ctrl_reg) & DPI_ENABLE;
 682
 683                 /* Due to some hardware limitations on BYT, MIPI Port C DPI
 684                  * Enable bit does not get set. To check whether DSI Port C
 685                  * was enabled in BIOS, check the Pipe B enable bit
 686                  */
 687                 if (IS_VALLEYVIEW(dev) && port == PORT_C)
 688                         dpi_enabled = I915_READ(PIPECONF(PIPE_B)) &
 689                                                         PIPECONF_ENABLE;
 690
 691                 if (dpi_enabled || (func & CMD_MODE_DATA_WIDTH_MASK)) {
 692                         if (I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY) {
 693                                 *pipe = port == PORT_A ? PIPE_A : PIPE_B;
 694                                 return true;
 695                         }
 696                 }
 697         }
 698
 699         return false;
 700 }
 701
 702 static void intel_dsi_get_config(struct intel_encoder *encoder,
 703                                  struct intel_crtc_state *pipe_config)
 704 {
 705         u32 pclk;
 706         DRM_DEBUG_KMS("\n");
 707
 708         pipe_config->has_dsi_encoder = true;
 709
 710         /*
 711          * DPLL_MD is not used in case of DSI, reading will get some default value
 712          * set dpll_md = 0
 713          */
 714         pipe_config->dpll_hw_state.dpll_md = 0;
 715
 716         pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp);
 717         if (!pclk)
 718                 return;
 719
 720         pipe_config->base.adjusted_mode.crtc_clock = pclk;
 721         pipe_config->port_clock = pclk;
 722 }
 723
 724 static enum drm_mode_status
 725 intel_dsi_mode_valid(struct drm_connector *connector,
 726                      struct drm_display_mode *mode)
 727 {
 728         struct intel_connector *intel_connector = to_intel_connector(connector);
 729         struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
 730         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 731
 732         DRM_DEBUG_KMS("\n");
 733
 734         if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
 735                 DRM_DEBUG_KMS("MODE_NO_DBLESCAN\n");
 736                 return MODE_NO_DBLESCAN;
 737         }
 738
 739         if (fixed_mode) {
 740                 if (mode->hdisplay > fixed_mode->hdisplay)
 741                         return MODE_PANEL;
 742                 if (mode->vdisplay > fixed_mode->vdisplay)
 743                         return MODE_PANEL;
 744                 if (fixed_mode->clock > max_dotclk)
 745                         return MODE_CLOCK_HIGH;
 746         }
 747
 748         return MODE_OK;
 749 }
 750
 751 /* return txclkesc cycles in terms of divider and duration in us */
 752 static u16 txclkesc(u32 divider, unsigned int us)
 753 {
 754         switch (divider) {
 755         case ESCAPE_CLOCK_DIVIDER_1:
 756         default:
 757                 return 20 * us;
 758         case ESCAPE_CLOCK_DIVIDER_2:
 759                 return 10 * us;
 760         case ESCAPE_CLOCK_DIVIDER_4:
 761                 return 5 * us;
 762         }
 763 }
 764
 765 /* return pixels in terms of txbyteclkhs */
 766 static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
 767                        u16 burst_mode_ratio)
 768 {
 769         return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
 770                                          8 * 100), lane_count);
 771 }
 772
 773 static void set_dsi_timings(struct drm_encoder *encoder,
 774                             const struct drm_display_mode *adjusted_mode)
 775 {
 776         struct drm_device *dev = encoder->dev;
 777         struct drm_i915_private *dev_priv = dev->dev_private;
 778         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 779         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 780         enum port port;
 781         unsigned int bpp = intel_crtc->config->pipe_bpp;
 782         unsigned int lane_count = intel_dsi->lane_count;
 783
 784         u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
 785
 786         hactive = adjusted_mode->crtc_hdisplay;
 787         hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay;
 788         hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
 789         hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end;
 790
 791         if (intel_dsi->dual_link) {
 792                 hactive /= 2;
 793                 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
 794                         hactive += intel_dsi->pixel_overlap;
 795                 hfp /= 2;
 796                 hsync /= 2;
 797                 hbp /= 2;
 798         }
 799
 800         vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay;
 801         vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
 802         vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end;
 803
 804         /* horizontal values are in terms of high speed byte clock */
 805         hactive = txbyteclkhs(hactive, bpp, lane_count,
 806                               intel_dsi->burst_mode_ratio);
 807         hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio);
 808         hsync = txbyteclkhs(hsync, bpp, lane_count,
 809                             intel_dsi->burst_mode_ratio);
 810         hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio);
 811
 812         for_each_dsi_port(port, intel_dsi->ports) {
 813                 if (IS_BROXTON(dev)) {
 814                         /*
 815                          * Program hdisplay and vdisplay on MIPI transcoder.
 816                          * This is different from calculated hactive and
 817                          * vactive, as they are calculated per channel basis,
 818                          * whereas these values should be based on resolution.
 819                          */
 820                         I915_WRITE(BXT_MIPI_TRANS_HACTIVE(port),
 821                                    adjusted_mode->crtc_hdisplay);
 822                         I915_WRITE(BXT_MIPI_TRANS_VACTIVE(port),
 823                                    adjusted_mode->crtc_vdisplay);
 824                         I915_WRITE(BXT_MIPI_TRANS_VTOTAL(port),
 825                                    adjusted_mode->crtc_vtotal);
 826                 }
 827
 828                 I915_WRITE(MIPI_HACTIVE_AREA_COUNT(port), hactive);
 829                 I915_WRITE(MIPI_HFP_COUNT(port), hfp);
 830
 831                 /* meaningful for video mode non-burst sync pulse mode only,
 832                  * can be zero for non-burst sync events and burst modes */
 833                 I915_WRITE(MIPI_HSYNC_PADDING_COUNT(port), hsync);
 834                 I915_WRITE(MIPI_HBP_COUNT(port), hbp);
 835
 836                 /* vertical values are in terms of lines */
 837                 I915_WRITE(MIPI_VFP_COUNT(port), vfp);
 838                 I915_WRITE(MIPI_VSYNC_PADDING_COUNT(port), vsync);
 839                 I915_WRITE(MIPI_VBP_COUNT(port), vbp);
 840         }
 841 }
 842
 843 static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
 844 {
 845         struct drm_encoder *encoder = &intel_encoder->base;
 846         struct drm_device *dev = encoder->dev;
 847         struct drm_i915_private *dev_priv = dev->dev_private;
 848         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 849         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 850         const struct drm_display_mode *adjusted_mode = &intel_crtc->config->base.adjusted_mode;
 851         enum port port;
 852         unsigned int bpp = intel_crtc->config->pipe_bpp;
 853         u32 val, tmp;
 854         u16 mode_hdisplay;
 855
 856         DRM_DEBUG_KMS("pipe %c\n", pipe_name(intel_crtc->pipe));
 857
 858         mode_hdisplay = adjusted_mode->crtc_hdisplay;
 859
 860         if (intel_dsi->dual_link) {
 861                 mode_hdisplay /= 2;
 862                 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
 863                         mode_hdisplay += intel_dsi->pixel_overlap;
 864         }
 865
 866         for_each_dsi_port(port, intel_dsi->ports) {
 867                 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
 868                         /*
 869                          * escape clock divider, 20MHz, shared for A and C.
 870                          * device ready must be off when doing this! txclkesc?
 871                          */
 872                         tmp = I915_READ(MIPI_CTRL(PORT_A));
 873                         tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
 874                         I915_WRITE(MIPI_CTRL(PORT_A), tmp |
 875                                         ESCAPE_CLOCK_DIVIDER_1);
 876
 877                         /* read request priority is per pipe */
 878                         tmp = I915_READ(MIPI_CTRL(port));
 879                         tmp &= ~READ_REQUEST_PRIORITY_MASK;
 880                         I915_WRITE(MIPI_CTRL(port), tmp |
 881                                         READ_REQUEST_PRIORITY_HIGH);
 882                 } else if (IS_BROXTON(dev)) {
 883                         enum pipe pipe = intel_crtc->pipe;
 884
 885                         tmp = I915_READ(MIPI_CTRL(port));
 886                         tmp &= ~BXT_PIPE_SELECT_MASK;
 887
 888                         tmp |= BXT_PIPE_SELECT(pipe);
 889                         I915_WRITE(MIPI_CTRL(port), tmp);
 890                 }
 891
 892                 /* XXX: why here, why like this? handling in irq handler?! */
 893                 I915_WRITE(MIPI_INTR_STAT(port), 0xffffffff);
 894                 I915_WRITE(MIPI_INTR_EN(port), 0xffffffff);
 895
 896                 I915_WRITE(MIPI_DPHY_PARAM(port), intel_dsi->dphy_reg);
 897
 898                 I915_WRITE(MIPI_DPI_RESOLUTION(port),
 899                         adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT |
 900                         mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT);
 901         }
 902
 903         set_dsi_timings(encoder, adjusted_mode);
 904
 905         val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
 906         if (is_cmd_mode(intel_dsi)) {
 907                 val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
 908                 val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
 909         } else {
 910                 val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
 911
 912                 /* XXX: cross-check bpp vs. pixel format? */
 913                 val |= intel_dsi->pixel_format;
 914         }
 915
 916         tmp = 0;
 917         if (intel_dsi->eotp_pkt == 0)
 918                 tmp |= EOT_DISABLE;
 919         if (intel_dsi->clock_stop)
 920                 tmp |= CLOCKSTOP;
 921
 922         for_each_dsi_port(port, intel_dsi->ports) {
 923                 I915_WRITE(MIPI_DSI_FUNC_PRG(port), val);
 924
 925                 /* timeouts for recovery. one frame IIUC. if counter expires,
 926                  * EOT and stop state. */
 927
 928                 /*
 929                  * In burst mode, value greater than one DPI line Time in byte
 930                  * clock (txbyteclkhs) To timeout this timer 1+ of the above
 931                  * said value is recommended.
 932                  *
 933                  * In non-burst mode, Value greater than one DPI frame time in
 934                  * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
 935                  * said value is recommended.
 936                  *
 937                  * In DBI only mode, value greater than one DBI frame time in
 938                  * byte clock(txbyteclkhs) To timeout this timer 1+ of the above
 939                  * said value is recommended.
 940                  */
 941
 942                 if (is_vid_mode(intel_dsi) &&
 943                         intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
 944                         I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
 945                                 txbyteclkhs(adjusted_mode->crtc_htotal, bpp,
 946                                             intel_dsi->lane_count,
 947                                             intel_dsi->burst_mode_ratio) + 1);
 948                 } else {
 949                         I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
 950                                 txbyteclkhs(adjusted_mode->crtc_vtotal *
 951                                             adjusted_mode->crtc_htotal,
 952                                             bpp, intel_dsi->lane_count,
 953                                             intel_dsi->burst_mode_ratio) + 1);
 954                 }
 955                 I915_WRITE(MIPI_LP_RX_TIMEOUT(port), intel_dsi->lp_rx_timeout);
 956                 I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(port),
 957                                                 intel_dsi->turn_arnd_val);
 958                 I915_WRITE(MIPI_DEVICE_RESET_TIMER(port),
 959                                                 intel_dsi->rst_timer_val);
 960
 961                 /* dphy stuff */
 962
 963                 /* in terms of low power clock */
 964                 I915_WRITE(MIPI_INIT_COUNT(port),
 965                                 txclkesc(intel_dsi->escape_clk_div, 100));
 966
 967                 if (IS_BROXTON(dev) && (!intel_dsi->dual_link)) {
 968                         /*
 969                          * BXT spec says write MIPI_INIT_COUNT for
 970                          * both the ports, even if only one is
 971                          * getting used. So write the other port
 972                          * if not in dual link mode.
 973                          */
 974                         I915_WRITE(MIPI_INIT_COUNT(port ==
 975                                                 PORT_A ? PORT_C : PORT_A),
 976                                         intel_dsi->init_count);
 977                 }
 978
 979                 /* recovery disables */
 980                 I915_WRITE(MIPI_EOT_DISABLE(port), tmp);
 981
 982                 /* in terms of low power clock */
 983                 I915_WRITE(MIPI_INIT_COUNT(port), intel_dsi->init_count);
 984
 985                 /* in terms of txbyteclkhs. actual high to low switch +
 986                  * MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK.
 987                  *
 988                  * XXX: write MIPI_STOP_STATE_STALL?
 989                  */
 990                 I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(port),
 991                                                 intel_dsi->hs_to_lp_count);
 992
 993                 /* XXX: low power clock equivalence in terms of byte clock.
 994                  * the number of byte clocks occupied in one low power clock.
 995                  * based on txbyteclkhs and txclkesc.
 996                  * txclkesc time / txbyteclk time * (105 + MIPI_STOP_STATE_STALL
 997                  * ) / 105.???
 998                  */
 999                 I915_WRITE(MIPI_LP_BYTECLK(port), intel_dsi->lp_byte_clk);
1000
1001                 /* the bw essential for transmitting 16 long packets containing
1002                  * 252 bytes meant for dcs write memory command is programmed in
1003                  * this register in terms of byte clocks. based on dsi transfer
1004                  * rate and the number of lanes configured the time taken to
1005                  * transmit 16 long packets in a dsi stream varies. */
1006                 I915_WRITE(MIPI_DBI_BW_CTRL(port), intel_dsi->bw_timer);
1007
1008                 I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(port),
1009                 intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT |
1010                 intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT);
1011
1012                 if (is_vid_mode(intel_dsi))
1013                         /* Some panels might have resolution which is not a
1014                          * multiple of 64 like 1366 x 768. Enable RANDOM
1015                          * resolution support for such panels by default */
1016                         I915_WRITE(MIPI_VIDEO_MODE_FORMAT(port),
1017                                 intel_dsi->video_frmt_cfg_bits |
1018                                 intel_dsi->video_mode_format |
1019                                 IP_TG_CONFIG |
1020                                 RANDOM_DPI_DISPLAY_RESOLUTION);
1021         }
1022 }
1023
1024 static enum drm_connector_status
1025 intel_dsi_detect(struct drm_connector *connector, bool force)
1026 {
1027         return connector_status_connected;
1028 }
1029
1030 static int intel_dsi_get_modes(struct drm_connector *connector)
1031 {
1032         struct intel_connector *intel_connector = to_intel_connector(connector);
1033         struct drm_display_mode *mode;
1034
1035         DRM_DEBUG_KMS("\n");
1036
1037         if (!intel_connector->panel.fixed_mode) {
1038                 DRM_DEBUG_KMS("no fixed mode\n");
1039                 return 0;
1040         }
1041
1042         mode = drm_mode_duplicate(connector->dev,
1043                                   intel_connector->panel.fixed_mode);
1044         if (!mode) {
1045                 DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
1046                 return 0;
1047         }
1048
1049         drm_mode_probed_add(connector, mode);
1050         return 1;
1051 }
1052
1053 static void intel_dsi_connector_destroy(struct drm_connector *connector)
1054 {
1055         struct intel_connector *intel_connector = to_intel_connector(connector);
1056
1057         DRM_DEBUG_KMS("\n");
1058         intel_panel_fini(&intel_connector->panel);
1059         drm_connector_cleanup(connector);
1060         kfree(connector);
1061 }
1062
1063 static void intel_dsi_encoder_destroy(struct drm_encoder *encoder)
1064 {
1065         struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
1066
1067         if (intel_dsi->panel) {
1068                 drm_panel_detach(intel_dsi->panel);
1069                 /* XXX: Logically this call belongs in the panel driver. */
1070                 drm_panel_remove(intel_dsi->panel);
1071         }
1072
1073         /* dispose of the gpios */
1074         if (intel_dsi->gpio_panel)
1075                 gpiod_put(intel_dsi->gpio_panel);
1076
1077         intel_encoder_destroy(encoder);
1078 }
1079
1080 static const struct drm_encoder_funcs intel_dsi_funcs = {
1081         .destroy = intel_dsi_encoder_destroy,
1082 };
1083
1084 static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = {
1085         .get_modes = intel_dsi_get_modes,
1086         .mode_valid = intel_dsi_mode_valid,
1087         .best_encoder = intel_best_encoder,
1088 };
1089
1090 static const struct drm_connector_funcs intel_dsi_connector_funcs = {
1091         .dpms = drm_atomic_helper_connector_dpms,
1092         .detect = intel_dsi_detect,
1093         .destroy = intel_dsi_connector_destroy,
1094         .fill_modes = drm_helper_probe_single_connector_modes,
1095         .atomic_get_property = intel_connector_atomic_get_property,
1096         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1097         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1098 };
1099
1100 void intel_dsi_init(struct drm_device *dev)
1101 {
1102         struct intel_dsi *intel_dsi;
1103         struct intel_encoder *intel_encoder;
1104         struct drm_encoder *encoder;
1105         struct intel_connector *intel_connector;
1106         struct drm_connector *connector;
1107         struct drm_display_mode *scan, *fixed_mode = NULL;
1108         struct drm_i915_private *dev_priv = dev->dev_private;
1109         enum port port;
1110         unsigned int i;
1111
1112         DRM_DEBUG_KMS("\n");
1113
1114         /* There is no detection method for MIPI so rely on VBT */
1115         if (!dev_priv->vbt.has_mipi)
1116                 return;
1117
1118         if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
1119                 dev_priv->mipi_mmio_base = VLV_MIPI_BASE;
1120         } else {
1121                 DRM_ERROR("Unsupported Mipi device to reg base");
1122                 return;
1123         }
1124
1125         intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL);
1126         if (!intel_dsi)
1127                 return;
1128
1129         intel_connector = intel_connector_alloc();
1130         if (!intel_connector) {
1131                 kfree(intel_dsi);
1132                 return;
1133         }
1134
1135         intel_encoder = &intel_dsi->base;
1136         encoder = &intel_encoder->base;
1137         intel_dsi->attached_connector = intel_connector;
1138
1139         connector = &intel_connector->base;
1140
1141         drm_encoder_init(dev, encoder, &intel_dsi_funcs, DRM_MODE_ENCODER_DSI,
1142                          NULL);
1143
1144         intel_encoder->compute_config = intel_dsi_compute_config;
1145         intel_encoder->pre_enable = intel_dsi_pre_enable;
1146         intel_encoder->enable = intel_dsi_enable_nop;
1147         intel_encoder->disable = intel_dsi_pre_disable;
1148         intel_encoder->post_disable = intel_dsi_post_disable;
1149         intel_encoder->get_hw_state = intel_dsi_get_hw_state;
1150         intel_encoder->get_config = intel_dsi_get_config;
1151
1152         intel_connector->get_hw_state = intel_connector_get_hw_state;
1153         intel_connector->unregister = intel_connector_unregister;
1154
1155         /* Pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI port C */
1156         if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIA) {
1157                 intel_encoder->crtc_mask = (1 << PIPE_A);
1158                 intel_dsi->ports = (1 << PORT_A);
1159         } else if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIC) {
1160                 intel_encoder->crtc_mask = (1 << PIPE_B);
1161                 intel_dsi->ports = (1 << PORT_C);
1162         }
1163
1164         if (dev_priv->vbt.dsi.config->dual_link)
1165                 intel_dsi->ports = ((1 << PORT_A) | (1 << PORT_C));
1166
1167         /* Create a DSI host (and a device) for each port. */
1168         for_each_dsi_port(port, intel_dsi->ports) {
1169                 struct intel_dsi_host *host;
1170
1171                 host = intel_dsi_host_init(intel_dsi, port);
1172                 if (!host)
1173                         goto err;
1174
1175                 intel_dsi->dsi_hosts[port] = host;
1176         }
1177
1178         for (i = 0; i < ARRAY_SIZE(intel_dsi_drivers); i++) {
1179                 intel_dsi->panel = intel_dsi_drivers[i].init(intel_dsi,
1180                                                              intel_dsi_drivers[i].panel_id);
1181                 if (intel_dsi->panel)
1182                         break;
1183         }
1184
1185         if (!intel_dsi->panel) {
1186                 DRM_DEBUG_KMS("no device found\n");
1187                 goto err;
1188         }
1189
1190         /*
1191          * In case of BYT with CRC PMIC, we need to use GPIO for
1192          * Panel control.
1193          */
1194         if (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) {
1195                 intel_dsi->gpio_panel =
1196                         gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH);
1197
1198                 if (IS_ERR(intel_dsi->gpio_panel)) {
1199                         DRM_ERROR("Failed to own gpio for panel control\n");
1200                         intel_dsi->gpio_panel = NULL;
1201                 }
1202         }
1203
1204         intel_encoder->type = INTEL_OUTPUT_DSI;
1205         intel_encoder->cloneable = 0;
1206         drm_connector_init(dev, connector, &intel_dsi_connector_funcs,
1207                            DRM_MODE_CONNECTOR_DSI);
1208
1209         drm_connector_helper_add(connector, &intel_dsi_connector_helper_funcs);
1210
1211         connector->display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/
1212         connector->interlace_allowed = false;
1213         connector->doublescan_allowed = false;
1214
1215         intel_connector_attach_encoder(intel_connector, intel_encoder);
1216
1217         drm_connector_register(connector);
1218
1219         drm_panel_attach(intel_dsi->panel, connector);
1220
1221         mutex_lock(&dev->mode_config.mutex);
1222         drm_panel_get_modes(intel_dsi->panel);
1223         list_for_each_entry(scan, &connector->probed_modes, head) {
1224                 if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
1225                         fixed_mode = drm_mode_duplicate(dev, scan);
1226                         break;
1227                 }
1228         }
1229         mutex_unlock(&dev->mode_config.mutex);
1230
1231         if (!fixed_mode) {
1232                 DRM_DEBUG_KMS("no fixed mode\n");
1233                 goto err;
1234         }
1235
1236         intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
1237         intel_panel_setup_backlight(connector, INVALID_PIPE);
1238
1239         return;
1240
1241 err:
1242         drm_encoder_cleanup(&intel_encoder->base);
1243         kfree(intel_dsi);
1244         kfree(intel_connector);
1245 }