1 // SPDX-License-Identifier: GPL-2.0-only 2 /************************************************************************** 3 * Copyright (c) 2011, Intel Corporation. 4 * All Rights Reserved. 5 * 6 **************************************************************************/ 7 8 #include <linux/delay.h> 9 #include <linux/dmi.h> 10 #include <linux/module.h> 11 12 #include <drm/drm.h> 13 14 #include "intel_bios.h" 15 #include "mid_bios.h" 16 #include "psb_drv.h" 17 #include "psb_intel_reg.h" 18 #include "psb_reg.h" 19 20 static int oaktrail_output_init(struct drm_device *dev) 21 { 22 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 23 if (dev_priv->iLVDS_enable) 24 oaktrail_lvds_init(dev, &dev_priv->mode_dev); 25 else 26 dev_err(dev->dev, "DSI is not supported\n"); 27 if (dev_priv->hdmi_priv) 28 oaktrail_hdmi_init(dev, &dev_priv->mode_dev); 29 30 psb_intel_sdvo_init(dev, SDVOB); 31 32 return 0; 33 } 34 35 /* 36 * Provide the low level interfaces for the Moorestown backlight 37 */ 38 39 #define MRST_BLC_MAX_PWM_REG_FREQ 0xFFFF 40 #define BLC_PWM_PRECISION_FACTOR 100 /* 10000000 */ 41 #define BLC_PWM_FREQ_CALC_CONSTANT 32 42 #define MHz 1000000 43 #define BLC_ADJUSTMENT_MAX 100 44 45 static void oaktrail_set_brightness(struct drm_device *dev, int level) 46 { 47 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 48 u32 blc_pwm_ctl; 49 u32 max_pwm_blc; 50 51 if (gma_power_begin(dev, 0)) { 52 /* Calculate and set the brightness value */ 53 max_pwm_blc = REG_READ(BLC_PWM_CTL) >> 16; 54 blc_pwm_ctl = level * max_pwm_blc / 100; 55 56 /* Adjust the backlight level with the percent in 57 * dev_priv->blc_adj1; 58 */ 59 blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj1; 60 blc_pwm_ctl = blc_pwm_ctl / 100; 61 62 /* Adjust the backlight level with the percent in 63 * dev_priv->blc_adj2; 64 */ 65 blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj2; 66 blc_pwm_ctl = blc_pwm_ctl / 100; 67 68 /* force PWM bit on */ 69 REG_WRITE(BLC_PWM_CTL2, (0x80000000 | REG_READ(BLC_PWM_CTL2))); 70 REG_WRITE(BLC_PWM_CTL, (max_pwm_blc << 16) | blc_pwm_ctl); 71 gma_power_end(dev); 72 } 73 } 74 75 static int oaktrail_backlight_init(struct drm_device *dev) 76 { 77 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 78 unsigned long core_clock; 79 u16 bl_max_freq; 80 uint32_t value; 81 uint32_t blc_pwm_precision_factor; 82 83 dev_priv->blc_adj1 = BLC_ADJUSTMENT_MAX; 84 dev_priv->blc_adj2 = BLC_ADJUSTMENT_MAX; 85 bl_max_freq = 256; 86 /* this needs to be set elsewhere */ 87 blc_pwm_precision_factor = BLC_PWM_PRECISION_FACTOR; 88 89 core_clock = dev_priv->core_freq; 90 91 value = (core_clock * MHz) / BLC_PWM_FREQ_CALC_CONSTANT; 92 value *= blc_pwm_precision_factor; 93 value /= bl_max_freq; 94 value /= blc_pwm_precision_factor; 95 96 if (value > (unsigned long long)MRST_BLC_MAX_PWM_REG_FREQ) 97 return -ERANGE; 98 99 if (gma_power_begin(dev, false)) { 100 REG_WRITE(BLC_PWM_CTL2, (0x80000000 | REG_READ(BLC_PWM_CTL2))); 101 REG_WRITE(BLC_PWM_CTL, value | (value << 16)); 102 gma_power_end(dev); 103 } 104 105 oaktrail_set_brightness(dev, PSB_MAX_BRIGHTNESS); 106 return 0; 107 } 108 109 /* 110 * Provide the Moorestown specific chip logic and low level methods 111 * for power management 112 */ 113 114 /** 115 * oaktrail_save_display_registers - save registers lost on suspend 116 * @dev: our DRM device 117 * 118 * Save the state we need in order to be able to restore the interface 119 * upon resume from suspend 120 */ 121 static int oaktrail_save_display_registers(struct drm_device *dev) 122 { 123 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 124 struct psb_save_area *regs = &dev_priv->regs; 125 struct psb_pipe *p = ®s->pipe[0]; 126 int i; 127 u32 pp_stat; 128 129 /* Display arbitration control + watermarks */ 130 regs->psb.saveDSPARB = PSB_RVDC32(DSPARB); 131 regs->psb.saveDSPFW1 = PSB_RVDC32(DSPFW1); 132 regs->psb.saveDSPFW2 = PSB_RVDC32(DSPFW2); 133 regs->psb.saveDSPFW3 = PSB_RVDC32(DSPFW3); 134 regs->psb.saveDSPFW4 = PSB_RVDC32(DSPFW4); 135 regs->psb.saveDSPFW5 = PSB_RVDC32(DSPFW5); 136 regs->psb.saveDSPFW6 = PSB_RVDC32(DSPFW6); 137 regs->psb.saveCHICKENBIT = PSB_RVDC32(DSPCHICKENBIT); 138 139 /* Pipe & plane A info */ 140 p->conf = PSB_RVDC32(PIPEACONF); 141 p->src = PSB_RVDC32(PIPEASRC); 142 p->fp0 = PSB_RVDC32(MRST_FPA0); 143 p->fp1 = PSB_RVDC32(MRST_FPA1); 144 p->dpll = PSB_RVDC32(MRST_DPLL_A); 145 p->htotal = PSB_RVDC32(HTOTAL_A); 146 p->hblank = PSB_RVDC32(HBLANK_A); 147 p->hsync = PSB_RVDC32(HSYNC_A); 148 p->vtotal = PSB_RVDC32(VTOTAL_A); 149 p->vblank = PSB_RVDC32(VBLANK_A); 150 p->vsync = PSB_RVDC32(VSYNC_A); 151 regs->psb.saveBCLRPAT_A = PSB_RVDC32(BCLRPAT_A); 152 p->cntr = PSB_RVDC32(DSPACNTR); 153 p->stride = PSB_RVDC32(DSPASTRIDE); 154 p->addr = PSB_RVDC32(DSPABASE); 155 p->surf = PSB_RVDC32(DSPASURF); 156 p->linoff = PSB_RVDC32(DSPALINOFF); 157 p->tileoff = PSB_RVDC32(DSPATILEOFF); 158 159 /* Save cursor regs */ 160 regs->psb.saveDSPACURSOR_CTRL = PSB_RVDC32(CURACNTR); 161 regs->psb.saveDSPACURSOR_BASE = PSB_RVDC32(CURABASE); 162 regs->psb.saveDSPACURSOR_POS = PSB_RVDC32(CURAPOS); 163 164 /* Save palette (gamma) */ 165 for (i = 0; i < 256; i++) 166 p->palette[i] = PSB_RVDC32(PALETTE_A + (i << 2)); 167 168 if (dev_priv->hdmi_priv) 169 oaktrail_hdmi_save(dev); 170 171 /* Save performance state */ 172 regs->psb.savePERF_MODE = PSB_RVDC32(MRST_PERF_MODE); 173 174 /* LVDS state */ 175 regs->psb.savePP_CONTROL = PSB_RVDC32(PP_CONTROL); 176 regs->psb.savePFIT_PGM_RATIOS = PSB_RVDC32(PFIT_PGM_RATIOS); 177 regs->psb.savePFIT_AUTO_RATIOS = PSB_RVDC32(PFIT_AUTO_RATIOS); 178 regs->saveBLC_PWM_CTL = PSB_RVDC32(BLC_PWM_CTL); 179 regs->saveBLC_PWM_CTL2 = PSB_RVDC32(BLC_PWM_CTL2); 180 regs->psb.saveLVDS = PSB_RVDC32(LVDS); 181 regs->psb.savePFIT_CONTROL = PSB_RVDC32(PFIT_CONTROL); 182 regs->psb.savePP_ON_DELAYS = PSB_RVDC32(LVDSPP_ON); 183 regs->psb.savePP_OFF_DELAYS = PSB_RVDC32(LVDSPP_OFF); 184 regs->psb.savePP_DIVISOR = PSB_RVDC32(PP_CYCLE); 185 186 /* HW overlay */ 187 regs->psb.saveOV_OVADD = PSB_RVDC32(OV_OVADD); 188 regs->psb.saveOV_OGAMC0 = PSB_RVDC32(OV_OGAMC0); 189 regs->psb.saveOV_OGAMC1 = PSB_RVDC32(OV_OGAMC1); 190 regs->psb.saveOV_OGAMC2 = PSB_RVDC32(OV_OGAMC2); 191 regs->psb.saveOV_OGAMC3 = PSB_RVDC32(OV_OGAMC3); 192 regs->psb.saveOV_OGAMC4 = PSB_RVDC32(OV_OGAMC4); 193 regs->psb.saveOV_OGAMC5 = PSB_RVDC32(OV_OGAMC5); 194 195 /* DPST registers */ 196 regs->psb.saveHISTOGRAM_INT_CONTROL_REG = 197 PSB_RVDC32(HISTOGRAM_INT_CONTROL); 198 regs->psb.saveHISTOGRAM_LOGIC_CONTROL_REG = 199 PSB_RVDC32(HISTOGRAM_LOGIC_CONTROL); 200 regs->psb.savePWM_CONTROL_LOGIC = PSB_RVDC32(PWM_CONTROL_LOGIC); 201 202 if (dev_priv->iLVDS_enable) { 203 /* Shut down the panel */ 204 PSB_WVDC32(0, PP_CONTROL); 205 206 do { 207 pp_stat = PSB_RVDC32(PP_STATUS); 208 } while (pp_stat & 0x80000000); 209 210 /* Turn off the plane */ 211 PSB_WVDC32(0x58000000, DSPACNTR); 212 /* Trigger the plane disable */ 213 PSB_WVDC32(0, DSPASURF); 214 215 /* Wait ~4 ticks */ 216 msleep(4); 217 218 /* Turn off pipe */ 219 PSB_WVDC32(0x0, PIPEACONF); 220 /* Wait ~8 ticks */ 221 msleep(8); 222 223 /* Turn off PLLs */ 224 PSB_WVDC32(0, MRST_DPLL_A); 225 } 226 return 0; 227 } 228 229 /** 230 * oaktrail_restore_display_registers - restore lost register state 231 * @dev: our DRM device 232 * 233 * Restore register state that was lost during suspend and resume. 234 */ 235 static int oaktrail_restore_display_registers(struct drm_device *dev) 236 { 237 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 238 struct psb_save_area *regs = &dev_priv->regs; 239 struct psb_pipe *p = ®s->pipe[0]; 240 u32 pp_stat; 241 int i; 242 243 /* Display arbitration + watermarks */ 244 PSB_WVDC32(regs->psb.saveDSPARB, DSPARB); 245 PSB_WVDC32(regs->psb.saveDSPFW1, DSPFW1); 246 PSB_WVDC32(regs->psb.saveDSPFW2, DSPFW2); 247 PSB_WVDC32(regs->psb.saveDSPFW3, DSPFW3); 248 PSB_WVDC32(regs->psb.saveDSPFW4, DSPFW4); 249 PSB_WVDC32(regs->psb.saveDSPFW5, DSPFW5); 250 PSB_WVDC32(regs->psb.saveDSPFW6, DSPFW6); 251 PSB_WVDC32(regs->psb.saveCHICKENBIT, DSPCHICKENBIT); 252 253 /* Make sure VGA plane is off. it initializes to on after reset!*/ 254 PSB_WVDC32(0x80000000, VGACNTRL); 255 256 /* set the plls */ 257 PSB_WVDC32(p->fp0, MRST_FPA0); 258 PSB_WVDC32(p->fp1, MRST_FPA1); 259 260 /* Actually enable it */ 261 PSB_WVDC32(p->dpll, MRST_DPLL_A); 262 udelay(150); 263 264 /* Restore mode */ 265 PSB_WVDC32(p->htotal, HTOTAL_A); 266 PSB_WVDC32(p->hblank, HBLANK_A); 267 PSB_WVDC32(p->hsync, HSYNC_A); 268 PSB_WVDC32(p->vtotal, VTOTAL_A); 269 PSB_WVDC32(p->vblank, VBLANK_A); 270 PSB_WVDC32(p->vsync, VSYNC_A); 271 PSB_WVDC32(p->src, PIPEASRC); 272 PSB_WVDC32(regs->psb.saveBCLRPAT_A, BCLRPAT_A); 273 274 /* Restore performance mode*/ 275 PSB_WVDC32(regs->psb.savePERF_MODE, MRST_PERF_MODE); 276 277 /* Enable the pipe*/ 278 if (dev_priv->iLVDS_enable) 279 PSB_WVDC32(p->conf, PIPEACONF); 280 281 /* Set up the plane*/ 282 PSB_WVDC32(p->linoff, DSPALINOFF); 283 PSB_WVDC32(p->stride, DSPASTRIDE); 284 PSB_WVDC32(p->tileoff, DSPATILEOFF); 285 286 /* Enable the plane */ 287 PSB_WVDC32(p->cntr, DSPACNTR); 288 PSB_WVDC32(p->surf, DSPASURF); 289 290 /* Enable Cursor A */ 291 PSB_WVDC32(regs->psb.saveDSPACURSOR_CTRL, CURACNTR); 292 PSB_WVDC32(regs->psb.saveDSPACURSOR_POS, CURAPOS); 293 PSB_WVDC32(regs->psb.saveDSPACURSOR_BASE, CURABASE); 294 295 /* Restore palette (gamma) */ 296 for (i = 0; i < 256; i++) 297 PSB_WVDC32(p->palette[i], PALETTE_A + (i << 2)); 298 299 if (dev_priv->hdmi_priv) 300 oaktrail_hdmi_restore(dev); 301 302 if (dev_priv->iLVDS_enable) { 303 PSB_WVDC32(regs->saveBLC_PWM_CTL2, BLC_PWM_CTL2); 304 PSB_WVDC32(regs->psb.saveLVDS, LVDS); /*port 61180h*/ 305 PSB_WVDC32(regs->psb.savePFIT_CONTROL, PFIT_CONTROL); 306 PSB_WVDC32(regs->psb.savePFIT_PGM_RATIOS, PFIT_PGM_RATIOS); 307 PSB_WVDC32(regs->psb.savePFIT_AUTO_RATIOS, PFIT_AUTO_RATIOS); 308 PSB_WVDC32(regs->saveBLC_PWM_CTL, BLC_PWM_CTL); 309 PSB_WVDC32(regs->psb.savePP_ON_DELAYS, LVDSPP_ON); 310 PSB_WVDC32(regs->psb.savePP_OFF_DELAYS, LVDSPP_OFF); 311 PSB_WVDC32(regs->psb.savePP_DIVISOR, PP_CYCLE); 312 PSB_WVDC32(regs->psb.savePP_CONTROL, PP_CONTROL); 313 } 314 315 /* Wait for cycle delay */ 316 do { 317 pp_stat = PSB_RVDC32(PP_STATUS); 318 } while (pp_stat & 0x08000000); 319 320 /* Wait for panel power up */ 321 do { 322 pp_stat = PSB_RVDC32(PP_STATUS); 323 } while (pp_stat & 0x10000000); 324 325 /* Restore HW overlay */ 326 PSB_WVDC32(regs->psb.saveOV_OVADD, OV_OVADD); 327 PSB_WVDC32(regs->psb.saveOV_OGAMC0, OV_OGAMC0); 328 PSB_WVDC32(regs->psb.saveOV_OGAMC1, OV_OGAMC1); 329 PSB_WVDC32(regs->psb.saveOV_OGAMC2, OV_OGAMC2); 330 PSB_WVDC32(regs->psb.saveOV_OGAMC3, OV_OGAMC3); 331 PSB_WVDC32(regs->psb.saveOV_OGAMC4, OV_OGAMC4); 332 PSB_WVDC32(regs->psb.saveOV_OGAMC5, OV_OGAMC5); 333 334 /* DPST registers */ 335 PSB_WVDC32(regs->psb.saveHISTOGRAM_INT_CONTROL_REG, 336 HISTOGRAM_INT_CONTROL); 337 PSB_WVDC32(regs->psb.saveHISTOGRAM_LOGIC_CONTROL_REG, 338 HISTOGRAM_LOGIC_CONTROL); 339 PSB_WVDC32(regs->psb.savePWM_CONTROL_LOGIC, PWM_CONTROL_LOGIC); 340 341 return 0; 342 } 343 344 /** 345 * oaktrail_power_down - power down the display island 346 * @dev: our DRM device 347 * 348 * Power down the display interface of our device 349 */ 350 static int oaktrail_power_down(struct drm_device *dev) 351 { 352 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 353 u32 pwr_mask ; 354 u32 pwr_sts; 355 356 pwr_mask = PSB_PWRGT_DISPLAY_MASK; 357 outl(pwr_mask, dev_priv->ospm_base + PSB_PM_SSC); 358 359 while (true) { 360 pwr_sts = inl(dev_priv->ospm_base + PSB_PM_SSS); 361 if ((pwr_sts & pwr_mask) == pwr_mask) 362 break; 363 else 364 udelay(10); 365 } 366 return 0; 367 } 368 369 /* 370 * oaktrail_power_up 371 * 372 * Restore power to the specified island(s) (powergating) 373 */ 374 static int oaktrail_power_up(struct drm_device *dev) 375 { 376 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 377 u32 pwr_mask = PSB_PWRGT_DISPLAY_MASK; 378 u32 pwr_sts, pwr_cnt; 379 380 pwr_cnt = inl(dev_priv->ospm_base + PSB_PM_SSC); 381 pwr_cnt &= ~pwr_mask; 382 outl(pwr_cnt, (dev_priv->ospm_base + PSB_PM_SSC)); 383 384 while (true) { 385 pwr_sts = inl(dev_priv->ospm_base + PSB_PM_SSS); 386 if ((pwr_sts & pwr_mask) == 0) 387 break; 388 else 389 udelay(10); 390 } 391 return 0; 392 } 393 394 /* Oaktrail */ 395 static const struct psb_offset oaktrail_regmap[2] = { 396 { 397 .fp0 = MRST_FPA0, 398 .fp1 = MRST_FPA1, 399 .cntr = DSPACNTR, 400 .conf = PIPEACONF, 401 .src = PIPEASRC, 402 .dpll = MRST_DPLL_A, 403 .htotal = HTOTAL_A, 404 .hblank = HBLANK_A, 405 .hsync = HSYNC_A, 406 .vtotal = VTOTAL_A, 407 .vblank = VBLANK_A, 408 .vsync = VSYNC_A, 409 .stride = DSPASTRIDE, 410 .size = DSPASIZE, 411 .pos = DSPAPOS, 412 .surf = DSPASURF, 413 .addr = MRST_DSPABASE, 414 .base = MRST_DSPABASE, 415 .status = PIPEASTAT, 416 .linoff = DSPALINOFF, 417 .tileoff = DSPATILEOFF, 418 .palette = PALETTE_A, 419 }, 420 { 421 .fp0 = FPB0, 422 .fp1 = FPB1, 423 .cntr = DSPBCNTR, 424 .conf = PIPEBCONF, 425 .src = PIPEBSRC, 426 .dpll = DPLL_B, 427 .htotal = HTOTAL_B, 428 .hblank = HBLANK_B, 429 .hsync = HSYNC_B, 430 .vtotal = VTOTAL_B, 431 .vblank = VBLANK_B, 432 .vsync = VSYNC_B, 433 .stride = DSPBSTRIDE, 434 .size = DSPBSIZE, 435 .pos = DSPBPOS, 436 .surf = DSPBSURF, 437 .addr = DSPBBASE, 438 .base = DSPBBASE, 439 .status = PIPEBSTAT, 440 .linoff = DSPBLINOFF, 441 .tileoff = DSPBTILEOFF, 442 .palette = PALETTE_B, 443 }, 444 }; 445 446 static int oaktrail_chip_setup(struct drm_device *dev) 447 { 448 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 449 int ret; 450 451 dev_priv->use_msi = true; 452 dev_priv->regmap = oaktrail_regmap; 453 454 ret = mid_chip_setup(dev); 455 if (ret < 0) 456 return ret; 457 if (!dev_priv->has_gct) { 458 /* Now pull the BIOS data */ 459 psb_intel_opregion_init(dev); 460 psb_intel_init_bios(dev); 461 } 462 gma_intel_setup_gmbus(dev); 463 oaktrail_hdmi_setup(dev); 464 return 0; 465 } 466 467 static void oaktrail_teardown(struct drm_device *dev) 468 { 469 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 470 471 gma_intel_teardown_gmbus(dev); 472 oaktrail_hdmi_teardown(dev); 473 if (!dev_priv->has_gct) 474 psb_intel_destroy_bios(dev); 475 } 476 477 const struct psb_ops oaktrail_chip_ops = { 478 .name = "Oaktrail", 479 .pipes = 2, 480 .crtcs = 2, 481 .hdmi_mask = (1 << 1), 482 .lvds_mask = (1 << 0), 483 .sdvo_mask = (1 << 1), 484 .cursor_needs_phys = 0, 485 .sgx_offset = MRST_SGX_OFFSET, 486 487 .chip_setup = oaktrail_chip_setup, 488 .chip_teardown = oaktrail_teardown, 489 .crtc_helper = &oaktrail_helper_funcs, 490 491 .output_init = oaktrail_output_init, 492 493 .backlight_init = oaktrail_backlight_init, 494 .backlight_set = oaktrail_set_brightness, 495 .backlight_name = "oaktrail-bl", 496 497 .save_regs = oaktrail_save_display_registers, 498 .restore_regs = oaktrail_restore_display_registers, 499 .save_crtc = gma_crtc_save, 500 .restore_crtc = gma_crtc_restore, 501 .power_down = oaktrail_power_down, 502 .power_up = oaktrail_power_up, 503 504 .i2c_bus = 1, 505 }; 506