1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Russell King 4 * Rewritten from the dovefb driver, and Armada510 manuals. 5 */ 6 7 #include <linux/clk.h> 8 #include <linux/component.h> 9 #include <linux/module.h> 10 #include <linux/of.h> 11 #include <linux/platform_device.h> 12 #include <linux/property.h> 13 14 #include <drm/drm_atomic.h> 15 #include <drm/drm_atomic_helper.h> 16 #include <drm/drm_probe_helper.h> 17 #include <drm/drm_vblank.h> 18 19 #include "armada_crtc.h" 20 #include "armada_drm.h" 21 #include "armada_fb.h" 22 #include "armada_gem.h" 23 #include "armada_hw.h" 24 #include "armada_plane.h" 25 #include "armada_trace.h" 26 27 /* 28 * A note about interlacing. Let's consider HDMI 1920x1080i. 29 * The timing parameters we have from X are: 30 * Hact HsyA HsyI Htot Vact VsyA VsyI Vtot 31 * 1920 2448 2492 2640 1080 1084 1094 1125 32 * Which get translated to: 33 * Hact HsyA HsyI Htot Vact VsyA VsyI Vtot 34 * 1920 2448 2492 2640 540 542 547 562 35 * 36 * This is how it is defined by CEA-861-D - line and pixel numbers are 37 * referenced to the rising edge of VSYNC and HSYNC. Total clocks per 38 * line: 2640. The odd frame, the first active line is at line 21, and 39 * the even frame, the first active line is 584. 40 * 41 * LN: 560 561 562 563 567 568 569 42 * DE: ~~~|____________________________//__________________________ 43 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____ 44 * VSYNC: _________________________|~~~~~~//~~~~~~~~~~~~~~~|__________ 45 * 22 blanking lines. VSYNC at 1320 (referenced to the HSYNC rising edge). 46 * 47 * LN: 1123 1124 1125 1 5 6 7 48 * DE: ~~~|____________________________//__________________________ 49 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____ 50 * VSYNC: ____________________|~~~~~~~~~~~//~~~~~~~~~~|_______________ 51 * 23 blanking lines 52 * 53 * The Armada LCD Controller line and pixel numbers are, like X timings, 54 * referenced to the top left of the active frame. 55 * 56 * So, translating these to our LCD controller: 57 * Odd frame, 563 total lines, VSYNC at line 543-548, pixel 1128. 58 * Even frame, 562 total lines, VSYNC at line 542-547, pixel 2448. 59 * Note: Vsync front porch remains constant! 60 * 61 * if (odd_frame) { 62 * vtotal = mode->crtc_vtotal + 1; 63 * vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay + 1; 64 * vhorizpos = mode->crtc_hsync_start - mode->crtc_htotal / 2 65 * } else { 66 * vtotal = mode->crtc_vtotal; 67 * vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay; 68 * vhorizpos = mode->crtc_hsync_start; 69 * } 70 * vfrontporch = mode->crtc_vtotal - mode->crtc_vsync_end; 71 * 72 * So, we need to reprogram these registers on each vsync event: 73 * LCD_SPU_V_PORCH, LCD_SPU_ADV_REG, LCD_SPUT_V_H_TOTAL 74 * 75 * Note: we do not use the frame done interrupts because these appear 76 * to happen too early, and lead to jitter on the display (presumably 77 * they occur at the end of the last active line, before the vsync back 78 * porch, which we're reprogramming.) 79 */ 80 81 void 82 armada_drm_crtc_update_regs(struct armada_crtc *dcrtc, struct armada_regs *regs) 83 { 84 while (regs->offset != ~0) { 85 void __iomem *reg = dcrtc->base + regs->offset; 86 uint32_t val; 87 88 val = regs->mask; 89 if (val != 0) 90 val &= readl_relaxed(reg); 91 writel_relaxed(val | regs->val, reg); 92 ++regs; 93 } 94 } 95 96 static void armada_drm_crtc_update(struct armada_crtc *dcrtc, bool enable) 97 { 98 uint32_t dumb_ctrl; 99 100 dumb_ctrl = dcrtc->cfg_dumb_ctrl; 101 102 if (enable) 103 dumb_ctrl |= CFG_DUMB_ENA; 104 105 /* 106 * When the dumb interface isn't in DUMB24_RGB888_0 mode, it might 107 * be using SPI or GPIO. If we set this to DUMB_BLANK, we will 108 * force LCD_D[23:0] to output blank color, overriding the GPIO or 109 * SPI usage. So leave it as-is unless in DUMB24_RGB888_0 mode. 110 */ 111 if (!enable && (dumb_ctrl & DUMB_MASK) == DUMB24_RGB888_0) { 112 dumb_ctrl &= ~DUMB_MASK; 113 dumb_ctrl |= DUMB_BLANK; 114 } 115 116 armada_updatel(dumb_ctrl, 117 ~(CFG_INV_CSYNC | CFG_INV_HSYNC | CFG_INV_VSYNC), 118 dcrtc->base + LCD_SPU_DUMB_CTRL); 119 } 120 121 static void armada_drm_crtc_queue_state_event(struct drm_crtc *crtc) 122 { 123 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 124 struct drm_pending_vblank_event *event; 125 126 /* If we have an event, we need vblank events enabled */ 127 event = xchg(&crtc->state->event, NULL); 128 if (event) { 129 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 130 dcrtc->event = event; 131 } 132 } 133 134 static void armada_drm_update_gamma(struct drm_crtc *crtc) 135 { 136 struct drm_property_blob *blob = crtc->state->gamma_lut; 137 void __iomem *base = drm_to_armada_crtc(crtc)->base; 138 int i; 139 140 if (blob) { 141 struct drm_color_lut *lut = blob->data; 142 143 armada_updatel(CFG_CSB_256x8, CFG_CSB_256x8 | CFG_PDWN256x8, 144 base + LCD_SPU_SRAM_PARA1); 145 146 for (i = 0; i < 256; i++) { 147 writel_relaxed(drm_color_lut_extract(lut[i].red, 8), 148 base + LCD_SPU_SRAM_WRDAT); 149 writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_YR, 150 base + LCD_SPU_SRAM_CTRL); 151 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 152 writel_relaxed(drm_color_lut_extract(lut[i].green, 8), 153 base + LCD_SPU_SRAM_WRDAT); 154 writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_UG, 155 base + LCD_SPU_SRAM_CTRL); 156 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 157 writel_relaxed(drm_color_lut_extract(lut[i].blue, 8), 158 base + LCD_SPU_SRAM_WRDAT); 159 writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_VB, 160 base + LCD_SPU_SRAM_CTRL); 161 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 162 } 163 armada_updatel(CFG_GAMMA_ENA, CFG_GAMMA_ENA, 164 base + LCD_SPU_DMA_CTRL0); 165 } else { 166 armada_updatel(0, CFG_GAMMA_ENA, base + LCD_SPU_DMA_CTRL0); 167 armada_updatel(CFG_PDWN256x8, CFG_CSB_256x8 | CFG_PDWN256x8, 168 base + LCD_SPU_SRAM_PARA1); 169 } 170 } 171 172 static enum drm_mode_status armada_drm_crtc_mode_valid(struct drm_crtc *crtc, 173 const struct drm_display_mode *mode) 174 { 175 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 176 177 if (mode->vscan > 1) 178 return MODE_NO_VSCAN; 179 180 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 181 return MODE_NO_DBLESCAN; 182 183 if (mode->flags & DRM_MODE_FLAG_HSKEW) 184 return MODE_H_ILLEGAL; 185 186 /* We can't do interlaced modes if we don't have the SPU_ADV_REG */ 187 if (!dcrtc->variant->has_spu_adv_reg && 188 mode->flags & DRM_MODE_FLAG_INTERLACE) 189 return MODE_NO_INTERLACE; 190 191 if (mode->flags & (DRM_MODE_FLAG_BCAST | DRM_MODE_FLAG_PIXMUX | 192 DRM_MODE_FLAG_CLKDIV2)) 193 return MODE_BAD; 194 195 return MODE_OK; 196 } 197 198 /* The mode_config.mutex will be held for this call */ 199 static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc, 200 const struct drm_display_mode *mode, struct drm_display_mode *adj) 201 { 202 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 203 int ret; 204 205 /* 206 * Set CRTC modesetting parameters for the adjusted mode. This is 207 * applied after the connectors, bridges, and encoders have fixed up 208 * this mode, as described above drm_atomic_helper_check_modeset(). 209 */ 210 drm_mode_set_crtcinfo(adj, CRTC_INTERLACE_HALVE_V); 211 212 /* 213 * Validate the adjusted mode in case an encoder/bridge has set 214 * something we don't support. 215 */ 216 if (armada_drm_crtc_mode_valid(crtc, adj) != MODE_OK) 217 return false; 218 219 /* Check whether the display mode is possible */ 220 ret = dcrtc->variant->compute_clock(dcrtc, adj, NULL); 221 if (ret) 222 return false; 223 224 return true; 225 } 226 227 /* These are locked by dev->vbl_lock */ 228 static void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask) 229 { 230 if (dcrtc->irq_ena & mask) { 231 dcrtc->irq_ena &= ~mask; 232 writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 233 } 234 } 235 236 static void armada_drm_crtc_enable_irq(struct armada_crtc *dcrtc, u32 mask) 237 { 238 if ((dcrtc->irq_ena & mask) != mask) { 239 dcrtc->irq_ena |= mask; 240 writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 241 if (readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR) & mask) 242 writel(0, dcrtc->base + LCD_SPU_IRQ_ISR); 243 } 244 } 245 246 static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat) 247 { 248 struct drm_pending_vblank_event *event; 249 void __iomem *base = dcrtc->base; 250 251 if (stat & DMA_FF_UNDERFLOW) 252 DRM_ERROR("video underflow on crtc %u\n", dcrtc->num); 253 if (stat & GRA_FF_UNDERFLOW) 254 DRM_ERROR("graphics underflow on crtc %u\n", dcrtc->num); 255 256 if (stat & VSYNC_IRQ) 257 drm_crtc_handle_vblank(&dcrtc->crtc); 258 259 spin_lock(&dcrtc->irq_lock); 260 if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) { 261 int i = stat & GRA_FRAME_IRQ0 ? 0 : 1; 262 uint32_t val; 263 264 writel_relaxed(dcrtc->v[i].spu_v_porch, base + LCD_SPU_V_PORCH); 265 writel_relaxed(dcrtc->v[i].spu_v_h_total, 266 base + LCD_SPUT_V_H_TOTAL); 267 268 val = readl_relaxed(base + LCD_SPU_ADV_REG); 269 val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN); 270 val |= dcrtc->v[i].spu_adv_reg; 271 writel_relaxed(val, base + LCD_SPU_ADV_REG); 272 } 273 274 if (stat & dcrtc->irq_ena & DUMB_FRAMEDONE) { 275 if (dcrtc->update_pending) { 276 armada_drm_crtc_update_regs(dcrtc, dcrtc->regs); 277 dcrtc->update_pending = false; 278 } 279 if (dcrtc->cursor_update) { 280 writel_relaxed(dcrtc->cursor_hw_pos, 281 base + LCD_SPU_HWC_OVSA_HPXL_VLN); 282 writel_relaxed(dcrtc->cursor_hw_sz, 283 base + LCD_SPU_HWC_HPXL_VLN); 284 armada_updatel(CFG_HWC_ENA, 285 CFG_HWC_ENA | CFG_HWC_1BITMOD | 286 CFG_HWC_1BITENA, 287 base + LCD_SPU_DMA_CTRL0); 288 dcrtc->cursor_update = false; 289 } 290 armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 291 } 292 spin_unlock(&dcrtc->irq_lock); 293 294 if (stat & VSYNC_IRQ && !dcrtc->update_pending) { 295 event = xchg(&dcrtc->event, NULL); 296 if (event) { 297 spin_lock(&dcrtc->crtc.dev->event_lock); 298 drm_crtc_send_vblank_event(&dcrtc->crtc, event); 299 spin_unlock(&dcrtc->crtc.dev->event_lock); 300 drm_crtc_vblank_put(&dcrtc->crtc); 301 } 302 } 303 } 304 305 static irqreturn_t armada_drm_irq(int irq, void *arg) 306 { 307 struct armada_crtc *dcrtc = arg; 308 u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR); 309 310 /* 311 * Reading the ISR appears to clear bits provided CLEAN_SPU_IRQ_ISR 312 * is set. Writing has some other effect to acknowledge the IRQ - 313 * without this, we only get a single IRQ. 314 */ 315 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR); 316 317 trace_armada_drm_irq(&dcrtc->crtc, stat); 318 319 /* Mask out those interrupts we haven't enabled */ 320 v = stat & dcrtc->irq_ena; 321 322 if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) { 323 armada_drm_crtc_irq(dcrtc, stat); 324 return IRQ_HANDLED; 325 } 326 return IRQ_NONE; 327 } 328 329 /* The mode_config.mutex will be held for this call */ 330 static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc) 331 { 332 struct drm_display_mode *adj = &crtc->state->adjusted_mode; 333 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 334 struct armada_regs regs[17]; 335 uint32_t lm, rm, tm, bm, val, sclk; 336 unsigned long flags; 337 unsigned i; 338 bool interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE); 339 340 i = 0; 341 rm = adj->crtc_hsync_start - adj->crtc_hdisplay; 342 lm = adj->crtc_htotal - adj->crtc_hsync_end; 343 bm = adj->crtc_vsync_start - adj->crtc_vdisplay; 344 tm = adj->crtc_vtotal - adj->crtc_vsync_end; 345 346 DRM_DEBUG_KMS("[CRTC:%d:%s] mode " DRM_MODE_FMT "\n", 347 crtc->base.id, crtc->name, DRM_MODE_ARG(adj)); 348 DRM_DEBUG_KMS("lm %d rm %d tm %d bm %d\n", lm, rm, tm, bm); 349 350 /* Now compute the divider for real */ 351 dcrtc->variant->compute_clock(dcrtc, adj, &sclk); 352 353 armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV); 354 355 spin_lock_irqsave(&dcrtc->irq_lock, flags); 356 357 dcrtc->interlaced = interlaced; 358 /* Even interlaced/progressive frame */ 359 dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 | 360 adj->crtc_htotal; 361 dcrtc->v[1].spu_v_porch = tm << 16 | bm; 362 val = adj->crtc_hsync_start; 363 dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN; 364 365 if (interlaced) { 366 /* Odd interlaced frame */ 367 val -= adj->crtc_htotal / 2; 368 dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN; 369 dcrtc->v[0].spu_v_h_total = dcrtc->v[1].spu_v_h_total + 370 (1 << 16); 371 dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1; 372 } else { 373 dcrtc->v[0] = dcrtc->v[1]; 374 } 375 376 val = adj->crtc_vdisplay << 16 | adj->crtc_hdisplay; 377 378 armada_reg_queue_set(regs, i, val, LCD_SPU_V_H_ACTIVE); 379 armada_reg_queue_set(regs, i, (lm << 16) | rm, LCD_SPU_H_PORCH); 380 armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_porch, LCD_SPU_V_PORCH); 381 armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total, 382 LCD_SPUT_V_H_TOTAL); 383 384 if (dcrtc->variant->has_spu_adv_reg) 385 armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg, 386 ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | 387 ADV_VSYNCOFFEN, LCD_SPU_ADV_REG); 388 389 val = adj->flags & DRM_MODE_FLAG_NVSYNC ? CFG_VSYNC_INV : 0; 390 armada_reg_queue_mod(regs, i, val, CFG_VSYNC_INV, LCD_SPU_DMA_CTRL1); 391 392 /* 393 * The documentation doesn't indicate what the normal state of 394 * the sync signals are. Sebastian Hesselbart kindly probed 395 * these signals on his board to determine their state. 396 * 397 * The non-inverted state of the sync signals is active high. 398 * Setting these bits makes the appropriate signal active low. 399 */ 400 val = 0; 401 if (adj->flags & DRM_MODE_FLAG_NCSYNC) 402 val |= CFG_INV_CSYNC; 403 if (adj->flags & DRM_MODE_FLAG_NHSYNC) 404 val |= CFG_INV_HSYNC; 405 if (adj->flags & DRM_MODE_FLAG_NVSYNC) 406 val |= CFG_INV_VSYNC; 407 armada_reg_queue_mod(regs, i, val, CFG_INV_CSYNC | CFG_INV_HSYNC | 408 CFG_INV_VSYNC, LCD_SPU_DUMB_CTRL); 409 armada_reg_queue_end(regs, i); 410 411 armada_drm_crtc_update_regs(dcrtc, regs); 412 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 413 } 414 415 static int armada_drm_crtc_atomic_check(struct drm_crtc *crtc, 416 struct drm_atomic_state *state) 417 { 418 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 419 crtc); 420 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 421 422 if (crtc_state->gamma_lut && drm_color_lut_size(crtc_state->gamma_lut) != 256) 423 return -EINVAL; 424 425 if (crtc_state->color_mgmt_changed) 426 crtc_state->planes_changed = true; 427 428 return 0; 429 } 430 431 static void armada_drm_crtc_atomic_begin(struct drm_crtc *crtc, 432 struct drm_atomic_state *state) 433 { 434 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 435 crtc); 436 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 437 438 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 439 440 if (crtc_state->color_mgmt_changed) 441 armada_drm_update_gamma(crtc); 442 443 dcrtc->regs_idx = 0; 444 dcrtc->regs = dcrtc->atomic_regs; 445 } 446 447 static void armada_drm_crtc_atomic_flush(struct drm_crtc *crtc, 448 struct drm_atomic_state *state) 449 { 450 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 451 crtc); 452 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 453 454 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 455 456 armada_reg_queue_end(dcrtc->regs, dcrtc->regs_idx); 457 458 /* 459 * If we aren't doing a full modeset, then we need to queue 460 * the event here. 461 */ 462 if (!drm_atomic_crtc_needs_modeset(crtc_state)) { 463 dcrtc->update_pending = true; 464 armada_drm_crtc_queue_state_event(crtc); 465 spin_lock_irq(&dcrtc->irq_lock); 466 armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 467 spin_unlock_irq(&dcrtc->irq_lock); 468 } else { 469 spin_lock_irq(&dcrtc->irq_lock); 470 armada_drm_crtc_update_regs(dcrtc, dcrtc->regs); 471 spin_unlock_irq(&dcrtc->irq_lock); 472 } 473 } 474 475 static void armada_drm_crtc_atomic_disable(struct drm_crtc *crtc, 476 struct drm_atomic_state *state) 477 { 478 struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state, 479 crtc); 480 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 481 struct drm_pending_vblank_event *event; 482 483 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 484 485 if (old_state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) 486 drm_crtc_vblank_put(crtc); 487 488 drm_crtc_vblank_off(crtc); 489 armada_drm_crtc_update(dcrtc, false); 490 491 if (!crtc->state->active) { 492 /* 493 * This modeset will be leaving the CRTC disabled, so 494 * call the backend to disable upstream clocks etc. 495 */ 496 if (dcrtc->variant->disable) 497 dcrtc->variant->disable(dcrtc); 498 499 /* 500 * We will not receive any further vblank events. 501 * Send the flip_done event manually. 502 */ 503 event = crtc->state->event; 504 crtc->state->event = NULL; 505 if (event) { 506 spin_lock_irq(&crtc->dev->event_lock); 507 drm_crtc_send_vblank_event(crtc, event); 508 spin_unlock_irq(&crtc->dev->event_lock); 509 } 510 } 511 } 512 513 static void armada_drm_crtc_atomic_enable(struct drm_crtc *crtc, 514 struct drm_atomic_state *state) 515 { 516 struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state, 517 crtc); 518 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 519 520 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 521 522 if (!old_state->active) { 523 /* 524 * This modeset is enabling the CRTC after it having 525 * been disabled. Reverse the call to ->disable in 526 * the atomic_disable(). 527 */ 528 if (dcrtc->variant->enable) 529 dcrtc->variant->enable(dcrtc, &crtc->state->adjusted_mode); 530 } 531 armada_drm_crtc_update(dcrtc, true); 532 drm_crtc_vblank_on(crtc); 533 534 if (crtc->state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) 535 WARN_ON(drm_crtc_vblank_get(crtc)); 536 537 armada_drm_crtc_queue_state_event(crtc); 538 } 539 540 static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = { 541 .mode_valid = armada_drm_crtc_mode_valid, 542 .mode_fixup = armada_drm_crtc_mode_fixup, 543 .mode_set_nofb = armada_drm_crtc_mode_set_nofb, 544 .atomic_check = armada_drm_crtc_atomic_check, 545 .atomic_begin = armada_drm_crtc_atomic_begin, 546 .atomic_flush = armada_drm_crtc_atomic_flush, 547 .atomic_disable = armada_drm_crtc_atomic_disable, 548 .atomic_enable = armada_drm_crtc_atomic_enable, 549 }; 550 551 static void armada_load_cursor_argb(void __iomem *base, uint32_t *pix, 552 unsigned stride, unsigned width, unsigned height) 553 { 554 uint32_t addr; 555 unsigned y; 556 557 addr = SRAM_HWC32_RAM1; 558 for (y = 0; y < height; y++) { 559 uint32_t *p = &pix[y * stride]; 560 unsigned x; 561 562 for (x = 0; x < width; x++, p++) { 563 uint32_t val = *p; 564 565 /* 566 * In "ARGB888" (HWC32) mode, writing to the SRAM 567 * requires these bits to contain: 568 * 31:24 = alpha 23:16 = blue 15:8 = green 7:0 = red 569 * So, it's actually ABGR8888. This is independent 570 * of the SWAPRB bits in DMA control register 0. 571 */ 572 val = (val & 0xff00ff00) | 573 (val & 0x000000ff) << 16 | 574 (val & 0x00ff0000) >> 16; 575 576 writel_relaxed(val, 577 base + LCD_SPU_SRAM_WRDAT); 578 writel_relaxed(addr | SRAM_WRITE, 579 base + LCD_SPU_SRAM_CTRL); 580 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 581 addr += 1; 582 if ((addr & 0x00ff) == 0) 583 addr += 0xf00; 584 if ((addr & 0x30ff) == 0) 585 addr = SRAM_HWC32_RAM2; 586 } 587 } 588 } 589 590 static void armada_drm_crtc_cursor_tran(void __iomem *base) 591 { 592 unsigned addr; 593 594 for (addr = 0; addr < 256; addr++) { 595 /* write the default value */ 596 writel_relaxed(0x55555555, base + LCD_SPU_SRAM_WRDAT); 597 writel_relaxed(addr | SRAM_WRITE | SRAM_HWC32_TRAN, 598 base + LCD_SPU_SRAM_CTRL); 599 } 600 } 601 602 static int armada_drm_crtc_cursor_update(struct armada_crtc *dcrtc, bool reload) 603 { 604 uint32_t xoff, xscr, w = dcrtc->cursor_w, s; 605 uint32_t yoff, yscr, h = dcrtc->cursor_h; 606 uint32_t para1; 607 608 /* 609 * Calculate the visible width and height of the cursor, 610 * screen position, and the position in the cursor bitmap. 611 */ 612 if (dcrtc->cursor_x < 0) { 613 xoff = -dcrtc->cursor_x; 614 xscr = 0; 615 w -= min(xoff, w); 616 } else if (dcrtc->cursor_x + w > dcrtc->crtc.mode.hdisplay) { 617 xoff = 0; 618 xscr = dcrtc->cursor_x; 619 w = max_t(int, dcrtc->crtc.mode.hdisplay - dcrtc->cursor_x, 0); 620 } else { 621 xoff = 0; 622 xscr = dcrtc->cursor_x; 623 } 624 625 if (dcrtc->cursor_y < 0) { 626 yoff = -dcrtc->cursor_y; 627 yscr = 0; 628 h -= min(yoff, h); 629 } else if (dcrtc->cursor_y + h > dcrtc->crtc.mode.vdisplay) { 630 yoff = 0; 631 yscr = dcrtc->cursor_y; 632 h = max_t(int, dcrtc->crtc.mode.vdisplay - dcrtc->cursor_y, 0); 633 } else { 634 yoff = 0; 635 yscr = dcrtc->cursor_y; 636 } 637 638 /* On interlaced modes, the vertical cursor size must be halved */ 639 s = dcrtc->cursor_w; 640 if (dcrtc->interlaced) { 641 s *= 2; 642 yscr /= 2; 643 h /= 2; 644 } 645 646 if (!dcrtc->cursor_obj || !h || !w) { 647 spin_lock_irq(&dcrtc->irq_lock); 648 dcrtc->cursor_update = false; 649 armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0); 650 spin_unlock_irq(&dcrtc->irq_lock); 651 return 0; 652 } 653 654 spin_lock_irq(&dcrtc->irq_lock); 655 para1 = readl_relaxed(dcrtc->base + LCD_SPU_SRAM_PARA1); 656 armada_updatel(CFG_CSB_256x32, CFG_CSB_256x32 | CFG_PDWN256x32, 657 dcrtc->base + LCD_SPU_SRAM_PARA1); 658 spin_unlock_irq(&dcrtc->irq_lock); 659 660 /* 661 * Initialize the transparency if the SRAM was powered down. 662 * We must also reload the cursor data as well. 663 */ 664 if (!(para1 & CFG_CSB_256x32)) { 665 armada_drm_crtc_cursor_tran(dcrtc->base); 666 reload = true; 667 } 668 669 if (dcrtc->cursor_hw_sz != (h << 16 | w)) { 670 spin_lock_irq(&dcrtc->irq_lock); 671 dcrtc->cursor_update = false; 672 armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0); 673 spin_unlock_irq(&dcrtc->irq_lock); 674 reload = true; 675 } 676 if (reload) { 677 struct armada_gem_object *obj = dcrtc->cursor_obj; 678 uint32_t *pix; 679 /* Set the top-left corner of the cursor image */ 680 pix = obj->addr; 681 pix += yoff * s + xoff; 682 armada_load_cursor_argb(dcrtc->base, pix, s, w, h); 683 } 684 685 /* Reload the cursor position, size and enable in the IRQ handler */ 686 spin_lock_irq(&dcrtc->irq_lock); 687 dcrtc->cursor_hw_pos = yscr << 16 | xscr; 688 dcrtc->cursor_hw_sz = h << 16 | w; 689 dcrtc->cursor_update = true; 690 armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 691 spin_unlock_irq(&dcrtc->irq_lock); 692 693 return 0; 694 } 695 696 static void cursor_update(void *data) 697 { 698 armada_drm_crtc_cursor_update(data, true); 699 } 700 701 static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc, 702 struct drm_file *file, uint32_t handle, uint32_t w, uint32_t h) 703 { 704 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 705 struct armada_gem_object *obj = NULL; 706 int ret; 707 708 /* If no cursor support, replicate drm's return value */ 709 if (!dcrtc->variant->has_spu_adv_reg) 710 return -ENXIO; 711 712 if (handle && w > 0 && h > 0) { 713 /* maximum size is 64x32 or 32x64 */ 714 if (w > 64 || h > 64 || (w > 32 && h > 32)) 715 return -ENOMEM; 716 717 obj = armada_gem_object_lookup(file, handle); 718 if (!obj) 719 return -ENOENT; 720 721 /* Must be a kernel-mapped object */ 722 if (!obj->addr) { 723 drm_gem_object_put(&obj->obj); 724 return -EINVAL; 725 } 726 727 if (obj->obj.size < w * h * 4) { 728 DRM_ERROR("buffer is too small\n"); 729 drm_gem_object_put(&obj->obj); 730 return -ENOMEM; 731 } 732 } 733 734 if (dcrtc->cursor_obj) { 735 dcrtc->cursor_obj->update = NULL; 736 dcrtc->cursor_obj->update_data = NULL; 737 drm_gem_object_put(&dcrtc->cursor_obj->obj); 738 } 739 dcrtc->cursor_obj = obj; 740 dcrtc->cursor_w = w; 741 dcrtc->cursor_h = h; 742 ret = armada_drm_crtc_cursor_update(dcrtc, true); 743 if (obj) { 744 obj->update_data = dcrtc; 745 obj->update = cursor_update; 746 } 747 748 return ret; 749 } 750 751 static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y) 752 { 753 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 754 int ret; 755 756 /* If no cursor support, replicate drm's return value */ 757 if (!dcrtc->variant->has_spu_adv_reg) 758 return -EFAULT; 759 760 dcrtc->cursor_x = x; 761 dcrtc->cursor_y = y; 762 ret = armada_drm_crtc_cursor_update(dcrtc, false); 763 764 return ret; 765 } 766 767 static void armada_drm_crtc_destroy(struct drm_crtc *crtc) 768 { 769 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 770 struct armada_private *priv = drm_to_armada_dev(crtc->dev); 771 772 if (dcrtc->cursor_obj) 773 drm_gem_object_put(&dcrtc->cursor_obj->obj); 774 775 priv->dcrtc[dcrtc->num] = NULL; 776 drm_crtc_cleanup(&dcrtc->crtc); 777 778 if (dcrtc->variant->disable) 779 dcrtc->variant->disable(dcrtc); 780 781 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA); 782 783 of_node_put(dcrtc->crtc.port); 784 785 kfree(dcrtc); 786 } 787 788 static int armada_drm_crtc_late_register(struct drm_crtc *crtc) 789 { 790 if (IS_ENABLED(CONFIG_DEBUG_FS)) 791 armada_drm_crtc_debugfs_init(drm_to_armada_crtc(crtc)); 792 793 return 0; 794 } 795 796 /* These are called under the vbl_lock. */ 797 static int armada_drm_crtc_enable_vblank(struct drm_crtc *crtc) 798 { 799 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 800 unsigned long flags; 801 802 spin_lock_irqsave(&dcrtc->irq_lock, flags); 803 armada_drm_crtc_enable_irq(dcrtc, VSYNC_IRQ_ENA); 804 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 805 return 0; 806 } 807 808 static void armada_drm_crtc_disable_vblank(struct drm_crtc *crtc) 809 { 810 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 811 unsigned long flags; 812 813 spin_lock_irqsave(&dcrtc->irq_lock, flags); 814 armada_drm_crtc_disable_irq(dcrtc, VSYNC_IRQ_ENA); 815 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 816 } 817 818 static const struct drm_crtc_funcs armada_crtc_funcs = { 819 .reset = drm_atomic_helper_crtc_reset, 820 .cursor_set = armada_drm_crtc_cursor_set, 821 .cursor_move = armada_drm_crtc_cursor_move, 822 .destroy = armada_drm_crtc_destroy, 823 .set_config = drm_atomic_helper_set_config, 824 .page_flip = drm_atomic_helper_page_flip, 825 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 826 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 827 .late_register = armada_drm_crtc_late_register, 828 .enable_vblank = armada_drm_crtc_enable_vblank, 829 .disable_vblank = armada_drm_crtc_disable_vblank, 830 }; 831 832 int armada_crtc_select_clock(struct armada_crtc *dcrtc, 833 struct armada_clk_result *res, 834 const struct armada_clocking_params *params, 835 struct clk *clks[], size_t num_clks, 836 unsigned long desired_khz) 837 { 838 unsigned long desired_hz = desired_khz * 1000; 839 unsigned long desired_clk_hz; // requested clk input 840 unsigned long real_clk_hz; // actual clk input 841 unsigned long real_hz; // actual pixel clk 842 unsigned long permillage; 843 struct clk *clk; 844 u32 div; 845 int i; 846 847 DRM_DEBUG_KMS("[CRTC:%u:%s] desired clock=%luHz\n", 848 dcrtc->crtc.base.id, dcrtc->crtc.name, desired_hz); 849 850 for (i = 0; i < num_clks; i++) { 851 clk = clks[i]; 852 if (!clk) 853 continue; 854 855 if (params->settable & BIT(i)) { 856 real_clk_hz = clk_round_rate(clk, desired_hz); 857 desired_clk_hz = desired_hz; 858 } else { 859 real_clk_hz = clk_get_rate(clk); 860 desired_clk_hz = real_clk_hz; 861 } 862 863 /* If the clock can do exactly the desired rate, we're done */ 864 if (real_clk_hz == desired_hz) { 865 real_hz = real_clk_hz; 866 div = 1; 867 goto found; 868 } 869 870 /* Calculate the divider - if invalid, we can't do this rate */ 871 div = DIV_ROUND_CLOSEST(real_clk_hz, desired_hz); 872 if (div == 0 || div > params->div_max) 873 continue; 874 875 /* Calculate the actual rate - HDMI requires -0.6%..+0.5% */ 876 real_hz = DIV_ROUND_CLOSEST(real_clk_hz, div); 877 878 DRM_DEBUG_KMS("[CRTC:%u:%s] clk=%u %luHz div=%u real=%luHz\n", 879 dcrtc->crtc.base.id, dcrtc->crtc.name, 880 i, real_clk_hz, div, real_hz); 881 882 /* Avoid repeated division */ 883 if (real_hz < desired_hz) { 884 permillage = real_hz / desired_khz; 885 if (permillage < params->permillage_min) 886 continue; 887 } else { 888 permillage = DIV_ROUND_UP(real_hz, desired_khz); 889 if (permillage > params->permillage_max) 890 continue; 891 } 892 goto found; 893 } 894 895 return -ERANGE; 896 897 found: 898 DRM_DEBUG_KMS("[CRTC:%u:%s] selected clk=%u %luHz div=%u real=%luHz\n", 899 dcrtc->crtc.base.id, dcrtc->crtc.name, 900 i, real_clk_hz, div, real_hz); 901 902 res->desired_clk_hz = desired_clk_hz; 903 res->clk = clk; 904 res->div = div; 905 906 return i; 907 } 908 909 static int armada_drm_crtc_create(struct drm_device *drm, struct device *dev, 910 struct resource *res, int irq, const struct armada_variant *variant, 911 struct device_node *port) 912 { 913 struct armada_private *priv = drm_to_armada_dev(drm); 914 struct armada_crtc *dcrtc; 915 struct drm_plane *primary; 916 void __iomem *base; 917 int ret; 918 919 base = devm_ioremap_resource(dev, res); 920 if (IS_ERR(base)) 921 return PTR_ERR(base); 922 923 dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL); 924 if (!dcrtc) { 925 DRM_ERROR("failed to allocate Armada crtc\n"); 926 return -ENOMEM; 927 } 928 929 if (dev != drm->dev) 930 dev_set_drvdata(dev, dcrtc); 931 932 dcrtc->variant = variant; 933 dcrtc->base = base; 934 dcrtc->num = drm->mode_config.num_crtc; 935 dcrtc->cfg_dumb_ctrl = DUMB24_RGB888_0; 936 dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24; 937 spin_lock_init(&dcrtc->irq_lock); 938 dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR; 939 940 /* Initialize some registers which we don't otherwise set */ 941 writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV); 942 writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_BLANKCOLOR); 943 writel_relaxed(dcrtc->spu_iopad_ctrl, 944 dcrtc->base + LCD_SPU_IOPAD_CONTROL); 945 writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_SRAM_PARA0); 946 writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 | 947 CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 | 948 CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1); 949 writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1); 950 writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 951 readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR); 952 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR); 953 954 ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc", 955 dcrtc); 956 if (ret < 0) 957 goto err_crtc; 958 959 if (dcrtc->variant->init) { 960 ret = dcrtc->variant->init(dcrtc, dev); 961 if (ret) 962 goto err_crtc; 963 } 964 965 /* Ensure AXI pipeline is enabled */ 966 armada_updatel(CFG_ARBFAST_ENA, 0, dcrtc->base + LCD_SPU_DMA_CTRL0); 967 968 priv->dcrtc[dcrtc->num] = dcrtc; 969 970 dcrtc->crtc.port = port; 971 972 primary = kzalloc(sizeof(*primary), GFP_KERNEL); 973 if (!primary) { 974 ret = -ENOMEM; 975 goto err_crtc; 976 } 977 978 ret = armada_drm_primary_plane_init(drm, primary); 979 if (ret) { 980 kfree(primary); 981 goto err_crtc; 982 } 983 984 ret = drm_crtc_init_with_planes(drm, &dcrtc->crtc, primary, NULL, 985 &armada_crtc_funcs, NULL); 986 if (ret) 987 goto err_crtc_init; 988 989 drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs); 990 991 ret = drm_mode_crtc_set_gamma_size(&dcrtc->crtc, 256); 992 if (ret) 993 return ret; 994 995 drm_crtc_enable_color_mgmt(&dcrtc->crtc, 0, false, 256); 996 997 return armada_overlay_plane_create(drm, 1 << dcrtc->num); 998 999 err_crtc_init: 1000 primary->funcs->destroy(primary); 1001 err_crtc: 1002 kfree(dcrtc); 1003 1004 return ret; 1005 } 1006 1007 static int 1008 armada_lcd_bind(struct device *dev, struct device *master, void *data) 1009 { 1010 struct platform_device *pdev = to_platform_device(dev); 1011 struct drm_device *drm = data; 1012 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1013 int irq = platform_get_irq(pdev, 0); 1014 const struct armada_variant *variant; 1015 struct device_node *port = NULL; 1016 struct device_node *np, *parent = dev->of_node; 1017 1018 if (irq < 0) 1019 return irq; 1020 1021 1022 variant = device_get_match_data(dev); 1023 if (!variant) 1024 return -ENXIO; 1025 1026 if (parent) { 1027 np = of_get_child_by_name(parent, "ports"); 1028 if (np) 1029 parent = np; 1030 port = of_get_child_by_name(parent, "port"); 1031 of_node_put(np); 1032 if (!port) { 1033 dev_err(dev, "no port node found in %pOF\n", parent); 1034 return -ENXIO; 1035 } 1036 } 1037 1038 return armada_drm_crtc_create(drm, dev, res, irq, variant, port); 1039 } 1040 1041 static void 1042 armada_lcd_unbind(struct device *dev, struct device *master, void *data) 1043 { 1044 struct armada_crtc *dcrtc = dev_get_drvdata(dev); 1045 1046 armada_drm_crtc_destroy(&dcrtc->crtc); 1047 } 1048 1049 static const struct component_ops armada_lcd_ops = { 1050 .bind = armada_lcd_bind, 1051 .unbind = armada_lcd_unbind, 1052 }; 1053 1054 static int armada_lcd_probe(struct platform_device *pdev) 1055 { 1056 return component_add(&pdev->dev, &armada_lcd_ops); 1057 } 1058 1059 static void armada_lcd_remove(struct platform_device *pdev) 1060 { 1061 component_del(&pdev->dev, &armada_lcd_ops); 1062 } 1063 1064 static const struct of_device_id armada_lcd_of_match[] = { 1065 { 1066 .compatible = "marvell,dove-lcd", 1067 .data = &armada510_ops, 1068 }, 1069 {} 1070 }; 1071 MODULE_DEVICE_TABLE(of, armada_lcd_of_match); 1072 1073 static const struct platform_device_id armada_lcd_platform_ids[] = { 1074 { 1075 .name = "armada-lcd", 1076 .driver_data = (unsigned long)&armada510_ops, 1077 }, { 1078 .name = "armada-510-lcd", 1079 .driver_data = (unsigned long)&armada510_ops, 1080 }, 1081 { }, 1082 }; 1083 MODULE_DEVICE_TABLE(platform, armada_lcd_platform_ids); 1084 1085 struct platform_driver armada_lcd_platform_driver = { 1086 .probe = armada_lcd_probe, 1087 .remove_new = armada_lcd_remove, 1088 .driver = { 1089 .name = "armada-lcd", 1090 .owner = THIS_MODULE, 1091 .of_match_table = armada_lcd_of_match, 1092 }, 1093 .id_table = armada_lcd_platform_ids, 1094 }; 1095