drivers/gpu/drm/i915/intel_dsi_panel_vbt.c

   1 /*
   2  * Copyright © 2014 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: Shobhit Kumar <shobhit.kumar@intel.com>
  24  *
  25  */
  26
  27 #include <drm/drmP.h>
  28 #include <drm/drm_crtc.h>
  29 #include <drm/drm_edid.h>
  30 #include <drm/i915_drm.h>
  31 #include <linux/slab.h>
  32 #include <video/mipi_display.h>
  33 #include <asm/intel-mid.h>
  34 #include <video/mipi_display.h>
  35 #include "i915_drv.h"
  36 #include "intel_drv.h"
  37 #include "intel_dsi.h"
  38 #include "intel_dsi_cmd.h"
  39
  40 #define MIPI_TRANSFER_MODE_SHIFT        0
  41 #define MIPI_VIRTUAL_CHANNEL_SHIFT      1
  42 #define MIPI_PORT_SHIFT                 3
  43
  44 #define PREPARE_CNT_MAX         0x3F
  45 #define EXIT_ZERO_CNT_MAX       0x3F
  46 #define CLK_ZERO_CNT_MAX        0xFF
  47 #define TRAIL_CNT_MAX           0x1F
  48
  49 #define NS_KHZ_RATIO 1000000
  50
  51 #define GPI0_NC_0_HV_DDI0_HPD           0x4130
  52 #define GPIO_NC_0_HV_DDI0_PAD           0x4138
  53 #define GPIO_NC_1_HV_DDI0_DDC_SDA       0x4120
  54 #define GPIO_NC_1_HV_DDI0_DDC_SDA_PAD   0x4128
  55 #define GPIO_NC_2_HV_DDI0_DDC_SCL       0x4110
  56 #define GPIO_NC_2_HV_DDI0_DDC_SCL_PAD   0x4118
  57 #define GPIO_NC_3_PANEL0_VDDEN          0x4140
  58 #define GPIO_NC_3_PANEL0_VDDEN_PAD      0x4148
  59 #define GPIO_NC_4_PANEL0_BLKEN          0x4150
  60 #define GPIO_NC_4_PANEL0_BLKEN_PAD      0x4158
  61 #define GPIO_NC_5_PANEL0_BLKCTL         0x4160
  62 #define GPIO_NC_5_PANEL0_BLKCTL_PAD     0x4168
  63 #define GPIO_NC_6_PCONF0                0x4180
  64 #define GPIO_NC_6_PAD                   0x4188
  65 #define GPIO_NC_7_PCONF0                0x4190
  66 #define GPIO_NC_7_PAD                   0x4198
  67 #define GPIO_NC_8_PCONF0                0x4170
  68 #define GPIO_NC_8_PAD                   0x4178
  69 #define GPIO_NC_9_PCONF0                0x4100
  70 #define GPIO_NC_9_PAD                   0x4108
  71 #define GPIO_NC_10_PCONF0               0x40E0
  72 #define GPIO_NC_10_PAD                  0x40E8
  73 #define GPIO_NC_11_PCONF0               0x40F0
  74 #define GPIO_NC_11_PAD                  0x40F8
  75
  76 struct gpio_table {
  77         u16 function_reg;
  78         u16 pad_reg;
  79         u8 init;
  80 };
  81
  82 static struct gpio_table gtable[] = {
  83         { GPI0_NC_0_HV_DDI0_HPD, GPIO_NC_0_HV_DDI0_PAD, 0 },
  84         { GPIO_NC_1_HV_DDI0_DDC_SDA, GPIO_NC_1_HV_DDI0_DDC_SDA_PAD, 0 },
  85         { GPIO_NC_2_HV_DDI0_DDC_SCL, GPIO_NC_2_HV_DDI0_DDC_SCL_PAD, 0 },
  86         { GPIO_NC_3_PANEL0_VDDEN, GPIO_NC_3_PANEL0_VDDEN_PAD, 0 },
  87         { GPIO_NC_4_PANEL0_BLKEN, GPIO_NC_4_PANEL0_BLKEN_PAD, 0 },
  88         { GPIO_NC_5_PANEL0_BLKCTL, GPIO_NC_5_PANEL0_BLKCTL_PAD, 0 },
  89         { GPIO_NC_6_PCONF0, GPIO_NC_6_PAD, 0 },
  90         { GPIO_NC_7_PCONF0, GPIO_NC_7_PAD, 0 },
  91         { GPIO_NC_8_PCONF0, GPIO_NC_8_PAD, 0 },
  92         { GPIO_NC_9_PCONF0, GPIO_NC_9_PAD, 0 },
  93         { GPIO_NC_10_PCONF0, GPIO_NC_10_PAD, 0},
  94         { GPIO_NC_11_PCONF0, GPIO_NC_11_PAD, 0}
  95 };
  96
  97 static u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, u8 *data)
  98 {
  99         u8 type, byte, mode, vc, port;
 100         u16 len;
 101
 102         byte = *data++;
 103         mode = (byte >> MIPI_TRANSFER_MODE_SHIFT) & 0x1;
 104         vc = (byte >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 0x3;
 105         port = (byte >> MIPI_PORT_SHIFT) & 0x3;
 106
 107         /* LP or HS mode */
 108         intel_dsi->hs = mode;
 109
 110         /* get packet type and increment the pointer */
 111         type = *data++;
 112
 113         len = *((u16 *) data);
 114         data += 2;
 115
 116         switch (type) {
 117         case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
 118                 dsi_vc_generic_write_0(intel_dsi, vc);
 119                 break;
 120         case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
 121                 dsi_vc_generic_write_1(intel_dsi, vc, *data);
 122                 break;
 123         case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
 124                 dsi_vc_generic_write_2(intel_dsi, vc, *data, *(data + 1));
 125                 break;
 126         case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
 127         case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
 128         case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
 129                 DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
 130                 break;
 131         case MIPI_DSI_GENERIC_LONG_WRITE:
 132                 dsi_vc_generic_write(intel_dsi, vc, data, len);
 133                 break;
 134         case MIPI_DSI_DCS_SHORT_WRITE:
 135                 dsi_vc_dcs_write_0(intel_dsi, vc, *data);
 136                 break;
 137         case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
 138                 dsi_vc_dcs_write_1(intel_dsi, vc, *data, *(data + 1));
 139                 break;
 140         case MIPI_DSI_DCS_READ:
 141                 DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
 142                 break;
 143         case MIPI_DSI_DCS_LONG_WRITE:
 144                 dsi_vc_dcs_write(intel_dsi, vc, data, len);
 145                 break;
 146         }
 147
 148         data += len;
 149
 150         return data;
 151 }
 152
 153 static u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, u8 *data)
 154 {
 155         u32 delay = *((u32 *) data);
 156
 157         usleep_range(delay, delay + 10);
 158         data += 4;
 159
 160         return data;
 161 }
 162
 163 static u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, u8 *data)
 164 {
 165         u8 gpio, action;
 166         u16 function, pad;
 167         u32 val;
 168         struct drm_device *dev = intel_dsi->base.base.dev;
 169         struct drm_i915_private *dev_priv = dev->dev_private;
 170
 171         gpio = *data++;
 172
 173         /* pull up/down */
 174         action = *data++;
 175
 176         function = gtable[gpio].function_reg;
 177         pad = gtable[gpio].pad_reg;
 178
 179         mutex_lock(&dev_priv->dpio_lock);
 180         if (!gtable[gpio].init) {
 181                 /* program the function */
 182                 /* FIXME: remove constant below */
 183                 vlv_gpio_nc_write(dev_priv, function, 0x2000CC00);
 184                 gtable[gpio].init = 1;
 185         }
 186
 187         val = 0x4 | action;
 188
 189         /* pull up/down */
 190         vlv_gpio_nc_write(dev_priv, pad, val);
 191         mutex_unlock(&dev_priv->dpio_lock);
 192
 193         return data;
 194 }
 195
 196 typedef u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi, u8 *data);
 197 static const fn_mipi_elem_exec exec_elem[] = {
 198         NULL, /* reserved */
 199         mipi_exec_send_packet,
 200         mipi_exec_delay,
 201         mipi_exec_gpio,
 202         NULL, /* status read; later */
 203 };
 204
 205 /*
 206  * MIPI Sequence from VBT #53 parsing logic
 207  * We have already separated each seqence during bios parsing
 208  * Following is generic execution function for any sequence
 209  */
 210
 211 static const char * const seq_name[] = {
 212         "UNDEFINED",
 213         "MIPI_SEQ_ASSERT_RESET",
 214         "MIPI_SEQ_INIT_OTP",
 215         "MIPI_SEQ_DISPLAY_ON",
 216         "MIPI_SEQ_DISPLAY_OFF",
 217         "MIPI_SEQ_DEASSERT_RESET"
 218 };
 219
 220 static void generic_exec_sequence(struct intel_dsi *intel_dsi, char *sequence)
 221 {
 222         u8 *data = sequence;
 223         fn_mipi_elem_exec mipi_elem_exec;
 224         int index;
 225
 226         if (!sequence)
 227                 return;
 228
 229         DRM_DEBUG_DRIVER("Starting MIPI sequence - %s\n", seq_name[*data]);
 230
 231         /* go to the first element of the sequence */
 232         data++;
 233
 234         /* parse each byte till we reach end of sequence byte - 0x00 */
 235         while (1) {
 236                 index = *data;
 237                 mipi_elem_exec = exec_elem[index];
 238                 if (!mipi_elem_exec) {
 239                         DRM_ERROR("Unsupported MIPI element, skipping sequence execution\n");
 240                         return;
 241                 }
 242
 243                 /* goto element payload */
 244                 data++;
 245
 246                 /* execute the element specific rotines */
 247                 data = mipi_elem_exec(intel_dsi, data);
 248
 249                 /*
 250                  * After processing the element, data should point to
 251                  * next element or end of sequence
 252                  * check if have we reached end of sequence
 253                  */
 254                 if (*data == 0x00)
 255                         break;
 256         }
 257 }
 258
 259 static bool generic_init(struct intel_dsi_device *dsi)
 260 {
 261         struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
 262         struct drm_device *dev = intel_dsi->base.base.dev;
 263         struct drm_i915_private *dev_priv = dev->dev_private;
 264         struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
 265         struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps;
 266         struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode;
 267         u32 bits_per_pixel = 24;
 268         u32 tlpx_ns, extra_byte_count, bitrate, tlpx_ui;
 269         u32 ui_num, ui_den;
 270         u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
 271         u32 ths_prepare_ns, tclk_trail_ns;
 272         u32 tclk_prepare_clkzero, ths_prepare_hszero;
 273         u32 lp_to_hs_switch, hs_to_lp_switch;
 274         u32 pclk, computed_ddr;
 275         u16 burst_mode_ratio;
 276
 277         DRM_DEBUG_KMS("\n");
 278
 279         intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1;
 280         intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0;
 281         intel_dsi->lane_count = mipi_config->lane_cnt + 1;
 282         intel_dsi->pixel_format = mipi_config->videomode_color_format << 7;
 283
 284         if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB666)
 285                 bits_per_pixel = 18;
 286         else if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB565)
 287                 bits_per_pixel = 16;
 288
 289         intel_dsi->operation_mode = mipi_config->is_cmd_mode;
 290         intel_dsi->video_mode_format = mipi_config->video_transfer_mode;
 291         intel_dsi->escape_clk_div = mipi_config->byte_clk_sel;
 292         intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout;
 293         intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout;
 294         intel_dsi->rst_timer_val = mipi_config->device_reset_timer;
 295         intel_dsi->init_count = mipi_config->master_init_timer;
 296         intel_dsi->bw_timer = mipi_config->dbi_bw_timer;
 297         intel_dsi->video_frmt_cfg_bits =
 298                 mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0;
 299
 300         pclk = mode->clock;
 301
 302         /* Burst Mode Ratio
 303          * Target ddr frequency from VBT / non burst ddr freq
 304          * multiply by 100 to preserve remainder
 305          */
 306         if (intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
 307                 if (mipi_config->target_burst_mode_freq) {
 308                         computed_ddr =
 309                                 (pclk * bits_per_pixel) / intel_dsi->lane_count;
 310
 311                         if (mipi_config->target_burst_mode_freq <
 312                                                                 computed_ddr) {
 313                                 DRM_ERROR("Burst mode freq is less than computed\n");
 314                                 return false;
 315                         }
 316
 317                         burst_mode_ratio = DIV_ROUND_UP(
 318                                 mipi_config->target_burst_mode_freq * 100,
 319                                 computed_ddr);
 320
 321                         pclk = DIV_ROUND_UP(pclk * burst_mode_ratio, 100);
 322                 } else {
 323                         DRM_ERROR("Burst mode target is not set\n");
 324                         return false;
 325                 }
 326         } else
 327                 burst_mode_ratio = 100;
 328
 329         intel_dsi->burst_mode_ratio = burst_mode_ratio;
 330         intel_dsi->pclk = pclk;
 331
 332         bitrate = (pclk * bits_per_pixel) / intel_dsi->lane_count;
 333
 334         switch (intel_dsi->escape_clk_div) {
 335         case 0:
 336                 tlpx_ns = 50;
 337                 break;
 338         case 1:
 339                 tlpx_ns = 100;
 340                 break;
 341
 342         case 2:
 343                 tlpx_ns = 200;
 344                 break;
 345         default:
 346                 tlpx_ns = 50;
 347                 break;
 348         }
 349
 350         switch (intel_dsi->lane_count) {
 351         case 1:
 352         case 2:
 353                 extra_byte_count = 2;
 354                 break;
 355         case 3:
 356                 extra_byte_count = 4;
 357                 break;
 358         case 4:
 359         default:
 360                 extra_byte_count = 3;
 361                 break;
 362         }
 363
 364         /*
 365          * ui(s) = 1/f [f in hz]
 366          * ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz)
 367          */
 368
 369         /* in Kbps */
 370         ui_num = NS_KHZ_RATIO;
 371         ui_den = bitrate;
 372
 373         tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
 374         ths_prepare_hszero = mipi_config->ths_prepare_hszero;
 375
 376         /*
 377          * B060
 378          * LP byte clock = TLPX/ (8UI)
 379          */
 380         intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
 381
 382         /* count values in UI = (ns value) * (bitrate / (2 * 10^6))
 383          *
 384          * Since txddrclkhs_i is 2xUI, all the count values programmed in
 385          * DPHY param register are divided by 2
 386          *
 387          * prepare count
 388          */
 389         ths_prepare_ns = max(mipi_config->ths_prepare,
 390                              mipi_config->tclk_prepare);
 391         prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * 2);
 392
 393         /* exit zero count */
 394         exit_zero_cnt = DIV_ROUND_UP(
 395                                 (ths_prepare_hszero - ths_prepare_ns) * ui_den,
 396                                 ui_num * 2
 397                                 );
 398
 399         /*
 400          * Exit zero  is unified val ths_zero and ths_exit
 401          * minimum value for ths_exit = 110ns
 402          * min (exit_zero_cnt * 2) = 110/UI
 403          * exit_zero_cnt = 55/UI
 404          */
 405          if (exit_zero_cnt < (55 * ui_den / ui_num))
 406                 if ((55 * ui_den) % ui_num)
 407                         exit_zero_cnt += 1;
 408
 409         /* clk zero count */
 410         clk_zero_cnt = DIV_ROUND_UP(
 411                         (tclk_prepare_clkzero - ths_prepare_ns)
 412                         * ui_den, 2 * ui_num);
 413
 414         /* trail count */
 415         tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
 416         trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, 2 * ui_num);
 417
 418         if (prepare_cnt > PREPARE_CNT_MAX ||
 419                 exit_zero_cnt > EXIT_ZERO_CNT_MAX ||
 420                 clk_zero_cnt > CLK_ZERO_CNT_MAX ||
 421                 trail_cnt > TRAIL_CNT_MAX)
 422                 DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");
 423
 424         if (prepare_cnt > PREPARE_CNT_MAX)
 425                 prepare_cnt = PREPARE_CNT_MAX;
 426
 427         if (exit_zero_cnt > EXIT_ZERO_CNT_MAX)
 428                 exit_zero_cnt = EXIT_ZERO_CNT_MAX;
 429
 430         if (clk_zero_cnt > CLK_ZERO_CNT_MAX)
 431                 clk_zero_cnt = CLK_ZERO_CNT_MAX;
 432
 433         if (trail_cnt > TRAIL_CNT_MAX)
 434                 trail_cnt = TRAIL_CNT_MAX;
 435
 436         /* B080 */
 437         intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
 438                                                 clk_zero_cnt << 8 | prepare_cnt;
 439
 440         /*
 441          * LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2
 442          *                                      + 10UI + Extra Byte Count
 443          *
 444          * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
 445          * Extra Byte Count is calculated according to number of lanes.
 446          * High Low Switch Count is the Max of LP to HS and
 447          * HS to LP switch count
 448          *
 449          */
 450         tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
 451
 452         /* B044 */
 453         /* FIXME:
 454          * The comment above does not match with the code */
 455         lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * 2 +
 456                                                 exit_zero_cnt * 2 + 10, 8);
 457
 458         hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
 459
 460         intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
 461         intel_dsi->hs_to_lp_count += extra_byte_count;
 462
 463         /* B088 */
 464         /* LP -> HS for clock lanes
 465          * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
 466          *                                              extra byte count
 467          * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
 468          *                                      2(in UI) + extra byte count
 469          * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
 470          *                                      8 + extra byte count
 471          */
 472         intel_dsi->clk_lp_to_hs_count =
 473                 DIV_ROUND_UP(
 474                         4 * tlpx_ui + prepare_cnt * 2 +
 475                         clk_zero_cnt * 2,
 476                         8);
 477
 478         intel_dsi->clk_lp_to_hs_count += extra_byte_count;
 479
 480         /* HS->LP for Clock Lanes
 481          * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
 482          *                                              Extra byte count
 483          * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
 484          * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
 485          *                                              Extra byte count
 486          */
 487         intel_dsi->clk_hs_to_lp_count =
 488                 DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
 489                         8);
 490         intel_dsi->clk_hs_to_lp_count += extra_byte_count;
 491
 492         DRM_DEBUG_KMS("Eot %s\n", intel_dsi->eotp_pkt ? "enabled" : "disabled");
 493         DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi->clock_stop ?
 494                                                 "disabled" : "enabled");
 495         DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
 496         DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format);
 497         DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div);
 498         DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout);
 499         DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val);
 500         DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count);
 501         DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count);
 502         DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk);
 503         DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer);
 504         DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count);
 505         DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count);
 506         DRM_DEBUG_KMS("BTA %s\n",
 507                         intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA ?
 508                         "disabled" : "enabled");
 509
 510         /* delays in VBT are in unit of 100us, so need to convert
 511          * here in ms
 512          * Delay (100us) * 100 /1000 = Delay / 10 (ms) */
 513         intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10;
 514         intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10;
 515         intel_dsi->panel_on_delay = pps->panel_on_delay / 10;
 516         intel_dsi->panel_off_delay = pps->panel_off_delay / 10;
 517         intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10;
 518
 519         return true;
 520 }
 521
 522 static int generic_mode_valid(struct intel_dsi_device *dsi,
 523                    struct drm_display_mode *mode)
 524 {
 525         return MODE_OK;
 526 }
 527
 528 static bool generic_mode_fixup(struct intel_dsi_device *dsi,
 529                     const struct drm_display_mode *mode,
 530                     struct drm_display_mode *adjusted_mode) {
 531         return true;
 532 }
 533
 534 static void generic_panel_reset(struct intel_dsi_device *dsi)
 535 {
 536         struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
 537         struct drm_device *dev = intel_dsi->base.base.dev;
 538         struct drm_i915_private *dev_priv = dev->dev_private;
 539
 540         char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET];
 541
 542         generic_exec_sequence(intel_dsi, sequence);
 543 }
 544
 545 static void generic_disable_panel_power(struct intel_dsi_device *dsi)
 546 {
 547         struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
 548         struct drm_device *dev = intel_dsi->base.base.dev;
 549         struct drm_i915_private *dev_priv = dev->dev_private;
 550
 551         char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET];
 552
 553         generic_exec_sequence(intel_dsi, sequence);
 554 }
 555
 556 static void generic_send_otp_cmds(struct intel_dsi_device *dsi)
 557 {
 558         struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
 559         struct drm_device *dev = intel_dsi->base.base.dev;
 560         struct drm_i915_private *dev_priv = dev->dev_private;
 561
 562         char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
 563
 564         generic_exec_sequence(intel_dsi, sequence);
 565 }
 566
 567 static void generic_enable(struct intel_dsi_device *dsi)
 568 {
 569         struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
 570         struct drm_device *dev = intel_dsi->base.base.dev;
 571         struct drm_i915_private *dev_priv = dev->dev_private;
 572
 573         char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_ON];
 574
 575         generic_exec_sequence(intel_dsi, sequence);
 576 }
 577
 578 static void generic_disable(struct intel_dsi_device *dsi)
 579 {
 580         struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
 581         struct drm_device *dev = intel_dsi->base.base.dev;
 582         struct drm_i915_private *dev_priv = dev->dev_private;
 583
 584         char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_OFF];
 585
 586         generic_exec_sequence(intel_dsi, sequence);
 587 }
 588
 589 static enum drm_connector_status generic_detect(struct intel_dsi_device *dsi)
 590 {
 591         return connector_status_connected;
 592 }
 593
 594 static bool generic_get_hw_state(struct intel_dsi_device *dev)
 595 {
 596         return true;
 597 }
 598
 599 static struct drm_display_mode *generic_get_modes(struct intel_dsi_device *dsi)
 600 {
 601         struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
 602         struct drm_device *dev = intel_dsi->base.base.dev;
 603         struct drm_i915_private *dev_priv = dev->dev_private;
 604
 605         dev_priv->vbt.lfp_lvds_vbt_mode->type |= DRM_MODE_TYPE_PREFERRED;
 606         return dev_priv->vbt.lfp_lvds_vbt_mode;
 607 }
 608
 609 static void generic_destroy(struct intel_dsi_device *dsi) { }
 610
 611 /* Callbacks. We might not need them all. */
 612 struct intel_dsi_dev_ops vbt_generic_dsi_display_ops = {
 613         .init = generic_init,
 614         .mode_valid = generic_mode_valid,
 615         .mode_fixup = generic_mode_fixup,
 616         .panel_reset = generic_panel_reset,
 617         .disable_panel_power = generic_disable_panel_power,
 618         .send_otp_cmds = generic_send_otp_cmds,
 619         .enable = generic_enable,
 620         .disable = generic_disable,
 621         .detect = generic_detect,
 622         .get_hw_state = generic_get_hw_state,
 623         .get_modes = generic_get_modes,
 624         .destroy = generic_destroy,
 625 };