1 /* 2 * Copyright (C) 2012 Russell King 3 * Rewritten from the dovefb driver, and Armada510 manuals. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 */ 9 #include <linux/clk.h> 10 #include <drm/drmP.h> 11 #include <drm/drm_crtc_helper.h> 12 #include "armada_crtc.h" 13 #include "armada_drm.h" 14 #include "armada_fb.h" 15 #include "armada_gem.h" 16 #include "armada_hw.h" 17 18 struct armada_frame_work { 19 struct drm_pending_vblank_event *event; 20 struct armada_regs regs[4]; 21 struct drm_framebuffer *old_fb; 22 }; 23 24 enum csc_mode { 25 CSC_AUTO = 0, 26 CSC_YUV_CCIR601 = 1, 27 CSC_YUV_CCIR709 = 2, 28 CSC_RGB_COMPUTER = 1, 29 CSC_RGB_STUDIO = 2, 30 }; 31 32 /* 33 * A note about interlacing. Let's consider HDMI 1920x1080i. 34 * The timing parameters we have from X are: 35 * Hact HsyA HsyI Htot Vact VsyA VsyI Vtot 36 * 1920 2448 2492 2640 1080 1084 1094 1125 37 * Which get translated to: 38 * Hact HsyA HsyI Htot Vact VsyA VsyI Vtot 39 * 1920 2448 2492 2640 540 542 547 562 40 * 41 * This is how it is defined by CEA-861-D - line and pixel numbers are 42 * referenced to the rising edge of VSYNC and HSYNC. Total clocks per 43 * line: 2640. The odd frame, the first active line is at line 21, and 44 * the even frame, the first active line is 584. 45 * 46 * LN: 560 561 562 563 567 568 569 47 * DE: ~~~|____________________________//__________________________ 48 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____ 49 * VSYNC: _________________________|~~~~~~//~~~~~~~~~~~~~~~|__________ 50 * 22 blanking lines. VSYNC at 1320 (referenced to the HSYNC rising edge). 51 * 52 * LN: 1123 1124 1125 1 5 6 7 53 * DE: ~~~|____________________________//__________________________ 54 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____ 55 * VSYNC: ____________________|~~~~~~~~~~~//~~~~~~~~~~|_______________ 56 * 23 blanking lines 57 * 58 * The Armada LCD Controller line and pixel numbers are, like X timings, 59 * referenced to the top left of the active frame. 60 * 61 * So, translating these to our LCD controller: 62 * Odd frame, 563 total lines, VSYNC at line 543-548, pixel 1128. 63 * Even frame, 562 total lines, VSYNC at line 542-547, pixel 2448. 64 * Note: Vsync front porch remains constant! 65 * 66 * if (odd_frame) { 67 * vtotal = mode->crtc_vtotal + 1; 68 * vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay + 1; 69 * vhorizpos = mode->crtc_hsync_start - mode->crtc_htotal / 2 70 * } else { 71 * vtotal = mode->crtc_vtotal; 72 * vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay; 73 * vhorizpos = mode->crtc_hsync_start; 74 * } 75 * vfrontporch = mode->crtc_vtotal - mode->crtc_vsync_end; 76 * 77 * So, we need to reprogram these registers on each vsync event: 78 * LCD_SPU_V_PORCH, LCD_SPU_ADV_REG, LCD_SPUT_V_H_TOTAL 79 * 80 * Note: we do not use the frame done interrupts because these appear 81 * to happen too early, and lead to jitter on the display (presumably 82 * they occur at the end of the last active line, before the vsync back 83 * porch, which we're reprogramming.) 84 */ 85 86 void 87 armada_drm_crtc_update_regs(struct armada_crtc *dcrtc, struct armada_regs *regs) 88 { 89 while (regs->offset != ~0) { 90 void __iomem *reg = dcrtc->base + regs->offset; 91 uint32_t val; 92 93 val = regs->mask; 94 if (val != 0) 95 val &= readl_relaxed(reg); 96 writel_relaxed(val | regs->val, reg); 97 ++regs; 98 } 99 } 100 101 #define dpms_blanked(dpms) ((dpms) != DRM_MODE_DPMS_ON) 102 103 static void armada_drm_crtc_update(struct armada_crtc *dcrtc) 104 { 105 uint32_t dumb_ctrl; 106 107 dumb_ctrl = dcrtc->cfg_dumb_ctrl; 108 109 if (!dpms_blanked(dcrtc->dpms)) 110 dumb_ctrl |= CFG_DUMB_ENA; 111 112 /* 113 * When the dumb interface isn't in DUMB24_RGB888_0 mode, it might 114 * be using SPI or GPIO. If we set this to DUMB_BLANK, we will 115 * force LCD_D[23:0] to output blank color, overriding the GPIO or 116 * SPI usage. So leave it as-is unless in DUMB24_RGB888_0 mode. 117 */ 118 if (dpms_blanked(dcrtc->dpms) && 119 (dumb_ctrl & DUMB_MASK) == DUMB24_RGB888_0) { 120 dumb_ctrl &= ~DUMB_MASK; 121 dumb_ctrl |= DUMB_BLANK; 122 } 123 124 /* 125 * The documentation doesn't indicate what the normal state of 126 * the sync signals are. Sebastian Hesselbart kindly probed 127 * these signals on his board to determine their state. 128 * 129 * The non-inverted state of the sync signals is active high. 130 * Setting these bits makes the appropriate signal active low. 131 */ 132 if (dcrtc->crtc.mode.flags & DRM_MODE_FLAG_NCSYNC) 133 dumb_ctrl |= CFG_INV_CSYNC; 134 if (dcrtc->crtc.mode.flags & DRM_MODE_FLAG_NHSYNC) 135 dumb_ctrl |= CFG_INV_HSYNC; 136 if (dcrtc->crtc.mode.flags & DRM_MODE_FLAG_NVSYNC) 137 dumb_ctrl |= CFG_INV_VSYNC; 138 139 if (dcrtc->dumb_ctrl != dumb_ctrl) { 140 dcrtc->dumb_ctrl = dumb_ctrl; 141 writel_relaxed(dumb_ctrl, dcrtc->base + LCD_SPU_DUMB_CTRL); 142 } 143 } 144 145 static unsigned armada_drm_crtc_calc_fb(struct drm_framebuffer *fb, 146 int x, int y, struct armada_regs *regs, bool interlaced) 147 { 148 struct armada_gem_object *obj = drm_fb_obj(fb); 149 unsigned pitch = fb->pitches[0]; 150 unsigned offset = y * pitch + x * fb->bits_per_pixel / 8; 151 uint32_t addr_odd, addr_even; 152 unsigned i = 0; 153 154 DRM_DEBUG_DRIVER("pitch %u x %d y %d bpp %d\n", 155 pitch, x, y, fb->bits_per_pixel); 156 157 addr_odd = addr_even = obj->dev_addr + offset; 158 159 if (interlaced) { 160 addr_even += pitch; 161 pitch *= 2; 162 } 163 164 /* write offset, base, and pitch */ 165 armada_reg_queue_set(regs, i, addr_odd, LCD_CFG_GRA_START_ADDR0); 166 armada_reg_queue_set(regs, i, addr_even, LCD_CFG_GRA_START_ADDR1); 167 armada_reg_queue_mod(regs, i, pitch, 0xffff, LCD_CFG_GRA_PITCH); 168 169 return i; 170 } 171 172 static int armada_drm_crtc_queue_frame_work(struct armada_crtc *dcrtc, 173 struct armada_frame_work *work) 174 { 175 struct drm_device *dev = dcrtc->crtc.dev; 176 unsigned long flags; 177 int ret; 178 179 ret = drm_vblank_get(dev, dcrtc->num); 180 if (ret) { 181 DRM_ERROR("failed to acquire vblank counter\n"); 182 return ret; 183 } 184 185 spin_lock_irqsave(&dev->event_lock, flags); 186 if (!dcrtc->frame_work) 187 dcrtc->frame_work = work; 188 else 189 ret = -EBUSY; 190 spin_unlock_irqrestore(&dev->event_lock, flags); 191 192 if (ret) 193 drm_vblank_put(dev, dcrtc->num); 194 195 return ret; 196 } 197 198 static void armada_drm_crtc_complete_frame_work(struct armada_crtc *dcrtc) 199 { 200 struct drm_device *dev = dcrtc->crtc.dev; 201 struct armada_frame_work *work = dcrtc->frame_work; 202 203 dcrtc->frame_work = NULL; 204 205 armada_drm_crtc_update_regs(dcrtc, work->regs); 206 207 if (work->event) 208 drm_send_vblank_event(dev, dcrtc->num, work->event); 209 210 drm_vblank_put(dev, dcrtc->num); 211 212 /* Finally, queue the process-half of the cleanup. */ 213 __armada_drm_queue_unref_work(dcrtc->crtc.dev, work->old_fb); 214 kfree(work); 215 } 216 217 static void armada_drm_crtc_finish_fb(struct armada_crtc *dcrtc, 218 struct drm_framebuffer *fb, bool force) 219 { 220 struct armada_frame_work *work; 221 222 if (!fb) 223 return; 224 225 if (force) { 226 /* Display is disabled, so just drop the old fb */ 227 drm_framebuffer_unreference(fb); 228 return; 229 } 230 231 work = kmalloc(sizeof(*work), GFP_KERNEL); 232 if (work) { 233 int i = 0; 234 work->event = NULL; 235 work->old_fb = fb; 236 armada_reg_queue_end(work->regs, i); 237 238 if (armada_drm_crtc_queue_frame_work(dcrtc, work) == 0) 239 return; 240 241 kfree(work); 242 } 243 244 /* 245 * Oops - just drop the reference immediately and hope for 246 * the best. The worst that will happen is the buffer gets 247 * reused before it has finished being displayed. 248 */ 249 drm_framebuffer_unreference(fb); 250 } 251 252 static void armada_drm_vblank_off(struct armada_crtc *dcrtc) 253 { 254 struct drm_device *dev = dcrtc->crtc.dev; 255 256 /* 257 * Tell the DRM core that vblank IRQs aren't going to happen for 258 * a while. This cleans up any pending vblank events for us. 259 */ 260 drm_vblank_off(dev, dcrtc->num); 261 262 /* Handle any pending flip event. */ 263 spin_lock_irq(&dev->event_lock); 264 if (dcrtc->frame_work) 265 armada_drm_crtc_complete_frame_work(dcrtc); 266 spin_unlock_irq(&dev->event_lock); 267 } 268 269 void armada_drm_crtc_gamma_set(struct drm_crtc *crtc, u16 r, u16 g, u16 b, 270 int idx) 271 { 272 } 273 274 void armada_drm_crtc_gamma_get(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, 275 int idx) 276 { 277 } 278 279 /* The mode_config.mutex will be held for this call */ 280 static void armada_drm_crtc_dpms(struct drm_crtc *crtc, int dpms) 281 { 282 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 283 284 if (dcrtc->dpms != dpms) { 285 dcrtc->dpms = dpms; 286 armada_drm_crtc_update(dcrtc); 287 if (dpms_blanked(dpms)) 288 armada_drm_vblank_off(dcrtc); 289 } 290 } 291 292 /* 293 * Prepare for a mode set. Turn off overlay to ensure that we don't end 294 * up with the overlay size being bigger than the active screen size. 295 * We rely upon X refreshing this state after the mode set has completed. 296 * 297 * The mode_config.mutex will be held for this call 298 */ 299 static void armada_drm_crtc_prepare(struct drm_crtc *crtc) 300 { 301 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 302 struct drm_plane *plane; 303 304 /* 305 * If we have an overlay plane associated with this CRTC, disable 306 * it before the modeset to avoid its coordinates being outside 307 * the new mode parameters. DRM doesn't provide help with this. 308 */ 309 plane = dcrtc->plane; 310 if (plane) { 311 struct drm_framebuffer *fb = plane->fb; 312 313 plane->funcs->disable_plane(plane); 314 plane->fb = NULL; 315 plane->crtc = NULL; 316 drm_framebuffer_unreference(fb); 317 } 318 } 319 320 /* The mode_config.mutex will be held for this call */ 321 static void armada_drm_crtc_commit(struct drm_crtc *crtc) 322 { 323 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 324 325 if (dcrtc->dpms != DRM_MODE_DPMS_ON) { 326 dcrtc->dpms = DRM_MODE_DPMS_ON; 327 armada_drm_crtc_update(dcrtc); 328 } 329 } 330 331 /* The mode_config.mutex will be held for this call */ 332 static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc, 333 const struct drm_display_mode *mode, struct drm_display_mode *adj) 334 { 335 struct armada_private *priv = crtc->dev->dev_private; 336 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 337 int ret; 338 339 /* We can't do interlaced modes if we don't have the SPU_ADV_REG */ 340 if (!priv->variant->has_spu_adv_reg && 341 adj->flags & DRM_MODE_FLAG_INTERLACE) 342 return false; 343 344 /* Check whether the display mode is possible */ 345 ret = priv->variant->crtc_compute_clock(dcrtc, adj, NULL); 346 if (ret) 347 return false; 348 349 return true; 350 } 351 352 void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat) 353 { 354 struct armada_vbl_event *e, *n; 355 void __iomem *base = dcrtc->base; 356 357 if (stat & DMA_FF_UNDERFLOW) 358 DRM_ERROR("video underflow on crtc %u\n", dcrtc->num); 359 if (stat & GRA_FF_UNDERFLOW) 360 DRM_ERROR("graphics underflow on crtc %u\n", dcrtc->num); 361 362 if (stat & VSYNC_IRQ) 363 drm_handle_vblank(dcrtc->crtc.dev, dcrtc->num); 364 365 spin_lock(&dcrtc->irq_lock); 366 367 list_for_each_entry_safe(e, n, &dcrtc->vbl_list, node) { 368 list_del_init(&e->node); 369 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num); 370 e->fn(dcrtc, e->data); 371 } 372 373 if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) { 374 int i = stat & GRA_FRAME_IRQ0 ? 0 : 1; 375 uint32_t val; 376 377 writel_relaxed(dcrtc->v[i].spu_v_porch, base + LCD_SPU_V_PORCH); 378 writel_relaxed(dcrtc->v[i].spu_v_h_total, 379 base + LCD_SPUT_V_H_TOTAL); 380 381 val = readl_relaxed(base + LCD_SPU_ADV_REG); 382 val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN); 383 val |= dcrtc->v[i].spu_adv_reg; 384 writel_relaxed(val, base + LCD_SPU_ADV_REG); 385 } 386 387 if (stat & DUMB_FRAMEDONE && dcrtc->cursor_update) { 388 writel_relaxed(dcrtc->cursor_hw_pos, 389 base + LCD_SPU_HWC_OVSA_HPXL_VLN); 390 writel_relaxed(dcrtc->cursor_hw_sz, 391 base + LCD_SPU_HWC_HPXL_VLN); 392 armada_updatel(CFG_HWC_ENA, 393 CFG_HWC_ENA | CFG_HWC_1BITMOD | CFG_HWC_1BITENA, 394 base + LCD_SPU_DMA_CTRL0); 395 dcrtc->cursor_update = false; 396 armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 397 } 398 399 spin_unlock(&dcrtc->irq_lock); 400 401 if (stat & GRA_FRAME_IRQ) { 402 struct drm_device *dev = dcrtc->crtc.dev; 403 404 spin_lock(&dev->event_lock); 405 if (dcrtc->frame_work) 406 armada_drm_crtc_complete_frame_work(dcrtc); 407 spin_unlock(&dev->event_lock); 408 409 wake_up(&dcrtc->frame_wait); 410 } 411 } 412 413 /* These are locked by dev->vbl_lock */ 414 void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask) 415 { 416 if (dcrtc->irq_ena & mask) { 417 dcrtc->irq_ena &= ~mask; 418 writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 419 } 420 } 421 422 void armada_drm_crtc_enable_irq(struct armada_crtc *dcrtc, u32 mask) 423 { 424 if ((dcrtc->irq_ena & mask) != mask) { 425 dcrtc->irq_ena |= mask; 426 writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 427 if (readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR) & mask) 428 writel(0, dcrtc->base + LCD_SPU_IRQ_ISR); 429 } 430 } 431 432 static uint32_t armada_drm_crtc_calculate_csc(struct armada_crtc *dcrtc) 433 { 434 struct drm_display_mode *adj = &dcrtc->crtc.mode; 435 uint32_t val = 0; 436 437 if (dcrtc->csc_yuv_mode == CSC_YUV_CCIR709) 438 val |= CFG_CSC_YUV_CCIR709; 439 if (dcrtc->csc_rgb_mode == CSC_RGB_STUDIO) 440 val |= CFG_CSC_RGB_STUDIO; 441 442 /* 443 * In auto mode, set the colorimetry, based upon the HDMI spec. 444 * 1280x720p, 1920x1080p and 1920x1080i use ITU709, others use 445 * ITU601. It may be more appropriate to set this depending on 446 * the source - but what if the graphic frame is YUV and the 447 * video frame is RGB? 448 */ 449 if ((adj->hdisplay == 1280 && adj->vdisplay == 720 && 450 !(adj->flags & DRM_MODE_FLAG_INTERLACE)) || 451 (adj->hdisplay == 1920 && adj->vdisplay == 1080)) { 452 if (dcrtc->csc_yuv_mode == CSC_AUTO) 453 val |= CFG_CSC_YUV_CCIR709; 454 } 455 456 /* 457 * We assume we're connected to a TV-like device, so the YUV->RGB 458 * conversion should produce a limited range. We should set this 459 * depending on the connectors attached to this CRTC, and what 460 * kind of device they report being connected. 461 */ 462 if (dcrtc->csc_rgb_mode == CSC_AUTO) 463 val |= CFG_CSC_RGB_STUDIO; 464 465 return val; 466 } 467 468 /* The mode_config.mutex will be held for this call */ 469 static int armada_drm_crtc_mode_set(struct drm_crtc *crtc, 470 struct drm_display_mode *mode, struct drm_display_mode *adj, 471 int x, int y, struct drm_framebuffer *old_fb) 472 { 473 struct armada_private *priv = crtc->dev->dev_private; 474 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 475 struct armada_regs regs[17]; 476 uint32_t lm, rm, tm, bm, val, sclk; 477 unsigned long flags; 478 unsigned i; 479 bool interlaced; 480 481 drm_framebuffer_reference(crtc->primary->fb); 482 483 interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE); 484 485 i = armada_drm_crtc_calc_fb(dcrtc->crtc.primary->fb, 486 x, y, regs, interlaced); 487 488 rm = adj->crtc_hsync_start - adj->crtc_hdisplay; 489 lm = adj->crtc_htotal - adj->crtc_hsync_end; 490 bm = adj->crtc_vsync_start - adj->crtc_vdisplay; 491 tm = adj->crtc_vtotal - adj->crtc_vsync_end; 492 493 DRM_DEBUG_DRIVER("H: %d %d %d %d lm %d rm %d\n", 494 adj->crtc_hdisplay, 495 adj->crtc_hsync_start, 496 adj->crtc_hsync_end, 497 adj->crtc_htotal, lm, rm); 498 DRM_DEBUG_DRIVER("V: %d %d %d %d tm %d bm %d\n", 499 adj->crtc_vdisplay, 500 adj->crtc_vsync_start, 501 adj->crtc_vsync_end, 502 adj->crtc_vtotal, tm, bm); 503 504 /* Wait for pending flips to complete */ 505 wait_event(dcrtc->frame_wait, !dcrtc->frame_work); 506 507 drm_vblank_pre_modeset(crtc->dev, dcrtc->num); 508 509 crtc->mode = *adj; 510 511 val = dcrtc->dumb_ctrl & ~CFG_DUMB_ENA; 512 if (val != dcrtc->dumb_ctrl) { 513 dcrtc->dumb_ctrl = val; 514 writel_relaxed(val, dcrtc->base + LCD_SPU_DUMB_CTRL); 515 } 516 517 /* Now compute the divider for real */ 518 priv->variant->crtc_compute_clock(dcrtc, adj, &sclk); 519 520 /* Ensure graphic fifo is enabled */ 521 armada_reg_queue_mod(regs, i, 0, CFG_PDWN64x66, LCD_SPU_SRAM_PARA1); 522 armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV); 523 524 if (interlaced ^ dcrtc->interlaced) { 525 if (adj->flags & DRM_MODE_FLAG_INTERLACE) 526 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num); 527 else 528 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num); 529 dcrtc->interlaced = interlaced; 530 } 531 532 spin_lock_irqsave(&dcrtc->irq_lock, flags); 533 534 /* Even interlaced/progressive frame */ 535 dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 | 536 adj->crtc_htotal; 537 dcrtc->v[1].spu_v_porch = tm << 16 | bm; 538 val = adj->crtc_hsync_start; 539 dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN | 540 priv->variant->spu_adv_reg; 541 542 if (interlaced) { 543 /* Odd interlaced frame */ 544 dcrtc->v[0].spu_v_h_total = dcrtc->v[1].spu_v_h_total + 545 (1 << 16); 546 dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1; 547 val = adj->crtc_hsync_start - adj->crtc_htotal / 2; 548 dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN | 549 priv->variant->spu_adv_reg; 550 } else { 551 dcrtc->v[0] = dcrtc->v[1]; 552 } 553 554 val = adj->crtc_vdisplay << 16 | adj->crtc_hdisplay; 555 556 armada_reg_queue_set(regs, i, val, LCD_SPU_V_H_ACTIVE); 557 armada_reg_queue_set(regs, i, val, LCD_SPU_GRA_HPXL_VLN); 558 armada_reg_queue_set(regs, i, val, LCD_SPU_GZM_HPXL_VLN); 559 armada_reg_queue_set(regs, i, (lm << 16) | rm, LCD_SPU_H_PORCH); 560 armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_porch, LCD_SPU_V_PORCH); 561 armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total, 562 LCD_SPUT_V_H_TOTAL); 563 564 if (priv->variant->has_spu_adv_reg) { 565 armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg, 566 ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | 567 ADV_VSYNCOFFEN, LCD_SPU_ADV_REG); 568 } 569 570 val = CFG_GRA_ENA | CFG_GRA_HSMOOTH; 571 val |= CFG_GRA_FMT(drm_fb_to_armada_fb(dcrtc->crtc.primary->fb)->fmt); 572 val |= CFG_GRA_MOD(drm_fb_to_armada_fb(dcrtc->crtc.primary->fb)->mod); 573 574 if (drm_fb_to_armada_fb(dcrtc->crtc.primary->fb)->fmt > CFG_420) 575 val |= CFG_PALETTE_ENA; 576 577 if (interlaced) 578 val |= CFG_GRA_FTOGGLE; 579 580 armada_reg_queue_mod(regs, i, val, CFG_GRAFORMAT | 581 CFG_GRA_MOD(CFG_SWAPRB | CFG_SWAPUV | 582 CFG_SWAPYU | CFG_YUV2RGB) | 583 CFG_PALETTE_ENA | CFG_GRA_FTOGGLE, 584 LCD_SPU_DMA_CTRL0); 585 586 val = adj->flags & DRM_MODE_FLAG_NVSYNC ? CFG_VSYNC_INV : 0; 587 armada_reg_queue_mod(regs, i, val, CFG_VSYNC_INV, LCD_SPU_DMA_CTRL1); 588 589 val = dcrtc->spu_iopad_ctrl | armada_drm_crtc_calculate_csc(dcrtc); 590 armada_reg_queue_set(regs, i, val, LCD_SPU_IOPAD_CONTROL); 591 armada_reg_queue_end(regs, i); 592 593 armada_drm_crtc_update_regs(dcrtc, regs); 594 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 595 596 armada_drm_crtc_update(dcrtc); 597 598 drm_vblank_post_modeset(crtc->dev, dcrtc->num); 599 armada_drm_crtc_finish_fb(dcrtc, old_fb, dpms_blanked(dcrtc->dpms)); 600 601 return 0; 602 } 603 604 /* The mode_config.mutex will be held for this call */ 605 static int armada_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, 606 struct drm_framebuffer *old_fb) 607 { 608 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 609 struct armada_regs regs[4]; 610 unsigned i; 611 612 i = armada_drm_crtc_calc_fb(crtc->primary->fb, crtc->x, crtc->y, regs, 613 dcrtc->interlaced); 614 armada_reg_queue_end(regs, i); 615 616 /* Wait for pending flips to complete */ 617 wait_event(dcrtc->frame_wait, !dcrtc->frame_work); 618 619 /* Take a reference to the new fb as we're using it */ 620 drm_framebuffer_reference(crtc->primary->fb); 621 622 /* Update the base in the CRTC */ 623 armada_drm_crtc_update_regs(dcrtc, regs); 624 625 /* Drop our previously held reference */ 626 armada_drm_crtc_finish_fb(dcrtc, old_fb, dpms_blanked(dcrtc->dpms)); 627 628 return 0; 629 } 630 631 static void armada_drm_crtc_load_lut(struct drm_crtc *crtc) 632 { 633 } 634 635 /* The mode_config.mutex will be held for this call */ 636 static void armada_drm_crtc_disable(struct drm_crtc *crtc) 637 { 638 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 639 640 armada_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF); 641 armada_drm_crtc_finish_fb(dcrtc, crtc->primary->fb, true); 642 643 /* Power down most RAMs and FIFOs */ 644 writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 | 645 CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 | 646 CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1); 647 } 648 649 static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = { 650 .dpms = armada_drm_crtc_dpms, 651 .prepare = armada_drm_crtc_prepare, 652 .commit = armada_drm_crtc_commit, 653 .mode_fixup = armada_drm_crtc_mode_fixup, 654 .mode_set = armada_drm_crtc_mode_set, 655 .mode_set_base = armada_drm_crtc_mode_set_base, 656 .load_lut = armada_drm_crtc_load_lut, 657 .disable = armada_drm_crtc_disable, 658 }; 659 660 static void armada_load_cursor_argb(void __iomem *base, uint32_t *pix, 661 unsigned stride, unsigned width, unsigned height) 662 { 663 uint32_t addr; 664 unsigned y; 665 666 addr = SRAM_HWC32_RAM1; 667 for (y = 0; y < height; y++) { 668 uint32_t *p = &pix[y * stride]; 669 unsigned x; 670 671 for (x = 0; x < width; x++, p++) { 672 uint32_t val = *p; 673 674 val = (val & 0xff00ff00) | 675 (val & 0x000000ff) << 16 | 676 (val & 0x00ff0000) >> 16; 677 678 writel_relaxed(val, 679 base + LCD_SPU_SRAM_WRDAT); 680 writel_relaxed(addr | SRAM_WRITE, 681 base + LCD_SPU_SRAM_CTRL); 682 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 683 addr += 1; 684 if ((addr & 0x00ff) == 0) 685 addr += 0xf00; 686 if ((addr & 0x30ff) == 0) 687 addr = SRAM_HWC32_RAM2; 688 } 689 } 690 } 691 692 static void armada_drm_crtc_cursor_tran(void __iomem *base) 693 { 694 unsigned addr; 695 696 for (addr = 0; addr < 256; addr++) { 697 /* write the default value */ 698 writel_relaxed(0x55555555, base + LCD_SPU_SRAM_WRDAT); 699 writel_relaxed(addr | SRAM_WRITE | SRAM_HWC32_TRAN, 700 base + LCD_SPU_SRAM_CTRL); 701 } 702 } 703 704 static int armada_drm_crtc_cursor_update(struct armada_crtc *dcrtc, bool reload) 705 { 706 uint32_t xoff, xscr, w = dcrtc->cursor_w, s; 707 uint32_t yoff, yscr, h = dcrtc->cursor_h; 708 uint32_t para1; 709 710 /* 711 * Calculate the visible width and height of the cursor, 712 * screen position, and the position in the cursor bitmap. 713 */ 714 if (dcrtc->cursor_x < 0) { 715 xoff = -dcrtc->cursor_x; 716 xscr = 0; 717 w -= min(xoff, w); 718 } else if (dcrtc->cursor_x + w > dcrtc->crtc.mode.hdisplay) { 719 xoff = 0; 720 xscr = dcrtc->cursor_x; 721 w = max_t(int, dcrtc->crtc.mode.hdisplay - dcrtc->cursor_x, 0); 722 } else { 723 xoff = 0; 724 xscr = dcrtc->cursor_x; 725 } 726 727 if (dcrtc->cursor_y < 0) { 728 yoff = -dcrtc->cursor_y; 729 yscr = 0; 730 h -= min(yoff, h); 731 } else if (dcrtc->cursor_y + h > dcrtc->crtc.mode.vdisplay) { 732 yoff = 0; 733 yscr = dcrtc->cursor_y; 734 h = max_t(int, dcrtc->crtc.mode.vdisplay - dcrtc->cursor_y, 0); 735 } else { 736 yoff = 0; 737 yscr = dcrtc->cursor_y; 738 } 739 740 /* On interlaced modes, the vertical cursor size must be halved */ 741 s = dcrtc->cursor_w; 742 if (dcrtc->interlaced) { 743 s *= 2; 744 yscr /= 2; 745 h /= 2; 746 } 747 748 if (!dcrtc->cursor_obj || !h || !w) { 749 spin_lock_irq(&dcrtc->irq_lock); 750 armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 751 dcrtc->cursor_update = false; 752 armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0); 753 spin_unlock_irq(&dcrtc->irq_lock); 754 return 0; 755 } 756 757 para1 = readl_relaxed(dcrtc->base + LCD_SPU_SRAM_PARA1); 758 armada_updatel(CFG_CSB_256x32, CFG_CSB_256x32 | CFG_PDWN256x32, 759 dcrtc->base + LCD_SPU_SRAM_PARA1); 760 761 /* 762 * Initialize the transparency if the SRAM was powered down. 763 * We must also reload the cursor data as well. 764 */ 765 if (!(para1 & CFG_CSB_256x32)) { 766 armada_drm_crtc_cursor_tran(dcrtc->base); 767 reload = true; 768 } 769 770 if (dcrtc->cursor_hw_sz != (h << 16 | w)) { 771 spin_lock_irq(&dcrtc->irq_lock); 772 armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 773 dcrtc->cursor_update = false; 774 armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0); 775 spin_unlock_irq(&dcrtc->irq_lock); 776 reload = true; 777 } 778 if (reload) { 779 struct armada_gem_object *obj = dcrtc->cursor_obj; 780 uint32_t *pix; 781 /* Set the top-left corner of the cursor image */ 782 pix = obj->addr; 783 pix += yoff * s + xoff; 784 armada_load_cursor_argb(dcrtc->base, pix, s, w, h); 785 } 786 787 /* Reload the cursor position, size and enable in the IRQ handler */ 788 spin_lock_irq(&dcrtc->irq_lock); 789 dcrtc->cursor_hw_pos = yscr << 16 | xscr; 790 dcrtc->cursor_hw_sz = h << 16 | w; 791 dcrtc->cursor_update = true; 792 armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 793 spin_unlock_irq(&dcrtc->irq_lock); 794 795 return 0; 796 } 797 798 static void cursor_update(void *data) 799 { 800 armada_drm_crtc_cursor_update(data, true); 801 } 802 803 static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc, 804 struct drm_file *file, uint32_t handle, uint32_t w, uint32_t h) 805 { 806 struct drm_device *dev = crtc->dev; 807 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 808 struct armada_private *priv = crtc->dev->dev_private; 809 struct armada_gem_object *obj = NULL; 810 int ret; 811 812 /* If no cursor support, replicate drm's return value */ 813 if (!priv->variant->has_spu_adv_reg) 814 return -ENXIO; 815 816 if (handle && w > 0 && h > 0) { 817 /* maximum size is 64x32 or 32x64 */ 818 if (w > 64 || h > 64 || (w > 32 && h > 32)) 819 return -ENOMEM; 820 821 obj = armada_gem_object_lookup(dev, file, handle); 822 if (!obj) 823 return -ENOENT; 824 825 /* Must be a kernel-mapped object */ 826 if (!obj->addr) { 827 drm_gem_object_unreference_unlocked(&obj->obj); 828 return -EINVAL; 829 } 830 831 if (obj->obj.size < w * h * 4) { 832 DRM_ERROR("buffer is too small\n"); 833 drm_gem_object_unreference_unlocked(&obj->obj); 834 return -ENOMEM; 835 } 836 } 837 838 mutex_lock(&dev->struct_mutex); 839 if (dcrtc->cursor_obj) { 840 dcrtc->cursor_obj->update = NULL; 841 dcrtc->cursor_obj->update_data = NULL; 842 drm_gem_object_unreference(&dcrtc->cursor_obj->obj); 843 } 844 dcrtc->cursor_obj = obj; 845 dcrtc->cursor_w = w; 846 dcrtc->cursor_h = h; 847 ret = armada_drm_crtc_cursor_update(dcrtc, true); 848 if (obj) { 849 obj->update_data = dcrtc; 850 obj->update = cursor_update; 851 } 852 mutex_unlock(&dev->struct_mutex); 853 854 return ret; 855 } 856 857 static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y) 858 { 859 struct drm_device *dev = crtc->dev; 860 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 861 struct armada_private *priv = crtc->dev->dev_private; 862 int ret; 863 864 /* If no cursor support, replicate drm's return value */ 865 if (!priv->variant->has_spu_adv_reg) 866 return -EFAULT; 867 868 mutex_lock(&dev->struct_mutex); 869 dcrtc->cursor_x = x; 870 dcrtc->cursor_y = y; 871 ret = armada_drm_crtc_cursor_update(dcrtc, false); 872 mutex_unlock(&dev->struct_mutex); 873 874 return ret; 875 } 876 877 static void armada_drm_crtc_destroy(struct drm_crtc *crtc) 878 { 879 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 880 struct armada_private *priv = crtc->dev->dev_private; 881 882 if (dcrtc->cursor_obj) 883 drm_gem_object_unreference(&dcrtc->cursor_obj->obj); 884 885 priv->dcrtc[dcrtc->num] = NULL; 886 drm_crtc_cleanup(&dcrtc->crtc); 887 888 if (!IS_ERR(dcrtc->clk)) 889 clk_disable_unprepare(dcrtc->clk); 890 891 kfree(dcrtc); 892 } 893 894 /* 895 * The mode_config lock is held here, to prevent races between this 896 * and a mode_set. 897 */ 898 static int armada_drm_crtc_page_flip(struct drm_crtc *crtc, 899 struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t page_flip_flags) 900 { 901 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 902 struct armada_frame_work *work; 903 struct drm_device *dev = crtc->dev; 904 unsigned long flags; 905 unsigned i; 906 int ret; 907 908 /* We don't support changing the pixel format */ 909 if (fb->pixel_format != crtc->primary->fb->pixel_format) 910 return -EINVAL; 911 912 work = kmalloc(sizeof(*work), GFP_KERNEL); 913 if (!work) 914 return -ENOMEM; 915 916 work->event = event; 917 work->old_fb = dcrtc->crtc.primary->fb; 918 919 i = armada_drm_crtc_calc_fb(fb, crtc->x, crtc->y, work->regs, 920 dcrtc->interlaced); 921 armada_reg_queue_end(work->regs, i); 922 923 /* 924 * Hold the old framebuffer for the work - DRM appears to drop our 925 * reference to the old framebuffer in drm_mode_page_flip_ioctl(). 926 */ 927 drm_framebuffer_reference(work->old_fb); 928 929 ret = armada_drm_crtc_queue_frame_work(dcrtc, work); 930 if (ret) { 931 /* 932 * Undo our reference above; DRM does not drop the reference 933 * to this object on error, so that's okay. 934 */ 935 drm_framebuffer_unreference(work->old_fb); 936 kfree(work); 937 return ret; 938 } 939 940 /* 941 * Don't take a reference on the new framebuffer; 942 * drm_mode_page_flip_ioctl() has already grabbed a reference and 943 * will _not_ drop that reference on successful return from this 944 * function. Simply mark this new framebuffer as the current one. 945 */ 946 dcrtc->crtc.primary->fb = fb; 947 948 /* 949 * Finally, if the display is blanked, we won't receive an 950 * interrupt, so complete it now. 951 */ 952 if (dpms_blanked(dcrtc->dpms)) { 953 spin_lock_irqsave(&dev->event_lock, flags); 954 if (dcrtc->frame_work) 955 armada_drm_crtc_complete_frame_work(dcrtc); 956 spin_unlock_irqrestore(&dev->event_lock, flags); 957 } 958 959 return 0; 960 } 961 962 static int 963 armada_drm_crtc_set_property(struct drm_crtc *crtc, 964 struct drm_property *property, uint64_t val) 965 { 966 struct armada_private *priv = crtc->dev->dev_private; 967 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 968 bool update_csc = false; 969 970 if (property == priv->csc_yuv_prop) { 971 dcrtc->csc_yuv_mode = val; 972 update_csc = true; 973 } else if (property == priv->csc_rgb_prop) { 974 dcrtc->csc_rgb_mode = val; 975 update_csc = true; 976 } 977 978 if (update_csc) { 979 uint32_t val; 980 981 val = dcrtc->spu_iopad_ctrl | 982 armada_drm_crtc_calculate_csc(dcrtc); 983 writel_relaxed(val, dcrtc->base + LCD_SPU_IOPAD_CONTROL); 984 } 985 986 return 0; 987 } 988 989 static struct drm_crtc_funcs armada_crtc_funcs = { 990 .cursor_set = armada_drm_crtc_cursor_set, 991 .cursor_move = armada_drm_crtc_cursor_move, 992 .destroy = armada_drm_crtc_destroy, 993 .set_config = drm_crtc_helper_set_config, 994 .page_flip = armada_drm_crtc_page_flip, 995 .set_property = armada_drm_crtc_set_property, 996 }; 997 998 static struct drm_prop_enum_list armada_drm_csc_yuv_enum_list[] = { 999 { CSC_AUTO, "Auto" }, 1000 { CSC_YUV_CCIR601, "CCIR601" }, 1001 { CSC_YUV_CCIR709, "CCIR709" }, 1002 }; 1003 1004 static struct drm_prop_enum_list armada_drm_csc_rgb_enum_list[] = { 1005 { CSC_AUTO, "Auto" }, 1006 { CSC_RGB_COMPUTER, "Computer system" }, 1007 { CSC_RGB_STUDIO, "Studio" }, 1008 }; 1009 1010 static int armada_drm_crtc_create_properties(struct drm_device *dev) 1011 { 1012 struct armada_private *priv = dev->dev_private; 1013 1014 if (priv->csc_yuv_prop) 1015 return 0; 1016 1017 priv->csc_yuv_prop = drm_property_create_enum(dev, 0, 1018 "CSC_YUV", armada_drm_csc_yuv_enum_list, 1019 ARRAY_SIZE(armada_drm_csc_yuv_enum_list)); 1020 priv->csc_rgb_prop = drm_property_create_enum(dev, 0, 1021 "CSC_RGB", armada_drm_csc_rgb_enum_list, 1022 ARRAY_SIZE(armada_drm_csc_rgb_enum_list)); 1023 1024 if (!priv->csc_yuv_prop || !priv->csc_rgb_prop) 1025 return -ENOMEM; 1026 1027 return 0; 1028 } 1029 1030 int armada_drm_crtc_create(struct drm_device *dev, unsigned num, 1031 struct resource *res) 1032 { 1033 struct armada_private *priv = dev->dev_private; 1034 struct armada_crtc *dcrtc; 1035 void __iomem *base; 1036 int ret; 1037 1038 ret = armada_drm_crtc_create_properties(dev); 1039 if (ret) 1040 return ret; 1041 1042 base = devm_request_and_ioremap(dev->dev, res); 1043 if (!base) { 1044 DRM_ERROR("failed to ioremap register\n"); 1045 return -ENOMEM; 1046 } 1047 1048 dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL); 1049 if (!dcrtc) { 1050 DRM_ERROR("failed to allocate Armada crtc\n"); 1051 return -ENOMEM; 1052 } 1053 1054 dcrtc->base = base; 1055 dcrtc->num = num; 1056 dcrtc->clk = ERR_PTR(-EINVAL); 1057 dcrtc->csc_yuv_mode = CSC_AUTO; 1058 dcrtc->csc_rgb_mode = CSC_AUTO; 1059 dcrtc->cfg_dumb_ctrl = DUMB24_RGB888_0; 1060 dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24; 1061 spin_lock_init(&dcrtc->irq_lock); 1062 dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR; 1063 INIT_LIST_HEAD(&dcrtc->vbl_list); 1064 init_waitqueue_head(&dcrtc->frame_wait); 1065 1066 /* Initialize some registers which we don't otherwise set */ 1067 writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV); 1068 writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_BLANKCOLOR); 1069 writel_relaxed(dcrtc->spu_iopad_ctrl, 1070 dcrtc->base + LCD_SPU_IOPAD_CONTROL); 1071 writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_SRAM_PARA0); 1072 writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 | 1073 CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 | 1074 CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1); 1075 writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1); 1076 writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_GRA_OVSA_HPXL_VLN); 1077 1078 if (priv->variant->crtc_init) { 1079 ret = priv->variant->crtc_init(dcrtc); 1080 if (ret) { 1081 kfree(dcrtc); 1082 return ret; 1083 } 1084 } 1085 1086 /* Ensure AXI pipeline is enabled */ 1087 armada_updatel(CFG_ARBFAST_ENA, 0, dcrtc->base + LCD_SPU_DMA_CTRL0); 1088 1089 priv->dcrtc[dcrtc->num] = dcrtc; 1090 1091 drm_crtc_init(dev, &dcrtc->crtc, &armada_crtc_funcs); 1092 drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs); 1093 1094 drm_object_attach_property(&dcrtc->crtc.base, priv->csc_yuv_prop, 1095 dcrtc->csc_yuv_mode); 1096 drm_object_attach_property(&dcrtc->crtc.base, priv->csc_rgb_prop, 1097 dcrtc->csc_rgb_mode); 1098 1099 return armada_overlay_plane_create(dev, 1 << dcrtc->num); 1100 } 1101