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_device.h> 11 #include <linux/platform_device.h> 12 13 #include <drm/drm_atomic.h> 14 #include <drm/drm_atomic_helper.h> 15 #include <drm/drm_probe_helper.h> 16 #include <drm/drm_vblank.h> 17 18 #include "armada_crtc.h" 19 #include "armada_drm.h" 20 #include "armada_fb.h" 21 #include "armada_gem.h" 22 #include "armada_hw.h" 23 #include "armada_plane.h" 24 #include "armada_trace.h" 25 26 /* 27 * A note about interlacing. Let's consider HDMI 1920x1080i. 28 * The timing parameters we have from X are: 29 * Hact HsyA HsyI Htot Vact VsyA VsyI Vtot 30 * 1920 2448 2492 2640 1080 1084 1094 1125 31 * Which get translated to: 32 * Hact HsyA HsyI Htot Vact VsyA VsyI Vtot 33 * 1920 2448 2492 2640 540 542 547 562 34 * 35 * This is how it is defined by CEA-861-D - line and pixel numbers are 36 * referenced to the rising edge of VSYNC and HSYNC. Total clocks per 37 * line: 2640. The odd frame, the first active line is at line 21, and 38 * the even frame, the first active line is 584. 39 * 40 * LN: 560 561 562 563 567 568 569 41 * DE: ~~~|____________________________//__________________________ 42 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____ 43 * VSYNC: _________________________|~~~~~~//~~~~~~~~~~~~~~~|__________ 44 * 22 blanking lines. VSYNC at 1320 (referenced to the HSYNC rising edge). 45 * 46 * LN: 1123 1124 1125 1 5 6 7 47 * DE: ~~~|____________________________//__________________________ 48 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____ 49 * VSYNC: ____________________|~~~~~~~~~~~//~~~~~~~~~~|_______________ 50 * 23 blanking lines 51 * 52 * The Armada LCD Controller line and pixel numbers are, like X timings, 53 * referenced to the top left of the active frame. 54 * 55 * So, translating these to our LCD controller: 56 * Odd frame, 563 total lines, VSYNC at line 543-548, pixel 1128. 57 * Even frame, 562 total lines, VSYNC at line 542-547, pixel 2448. 58 * Note: Vsync front porch remains constant! 59 * 60 * if (odd_frame) { 61 * vtotal = mode->crtc_vtotal + 1; 62 * vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay + 1; 63 * vhorizpos = mode->crtc_hsync_start - mode->crtc_htotal / 2 64 * } else { 65 * vtotal = mode->crtc_vtotal; 66 * vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay; 67 * vhorizpos = mode->crtc_hsync_start; 68 * } 69 * vfrontporch = mode->crtc_vtotal - mode->crtc_vsync_end; 70 * 71 * So, we need to reprogram these registers on each vsync event: 72 * LCD_SPU_V_PORCH, LCD_SPU_ADV_REG, LCD_SPUT_V_H_TOTAL 73 * 74 * Note: we do not use the frame done interrupts because these appear 75 * to happen too early, and lead to jitter on the display (presumably 76 * they occur at the end of the last active line, before the vsync back 77 * porch, which we're reprogramming.) 78 */ 79 80 void 81 armada_drm_crtc_update_regs(struct armada_crtc *dcrtc, struct armada_regs *regs) 82 { 83 while (regs->offset != ~0) { 84 void __iomem *reg = dcrtc->base + regs->offset; 85 uint32_t val; 86 87 val = regs->mask; 88 if (val != 0) 89 val &= readl_relaxed(reg); 90 writel_relaxed(val | regs->val, reg); 91 ++regs; 92 } 93 } 94 95 static void armada_drm_crtc_update(struct armada_crtc *dcrtc, bool enable) 96 { 97 uint32_t dumb_ctrl; 98 99 dumb_ctrl = dcrtc->cfg_dumb_ctrl; 100 101 if (enable) 102 dumb_ctrl |= CFG_DUMB_ENA; 103 104 /* 105 * When the dumb interface isn't in DUMB24_RGB888_0 mode, it might 106 * be using SPI or GPIO. If we set this to DUMB_BLANK, we will 107 * force LCD_D[23:0] to output blank color, overriding the GPIO or 108 * SPI usage. So leave it as-is unless in DUMB24_RGB888_0 mode. 109 */ 110 if (!enable && (dumb_ctrl & DUMB_MASK) == DUMB24_RGB888_0) { 111 dumb_ctrl &= ~DUMB_MASK; 112 dumb_ctrl |= DUMB_BLANK; 113 } 114 115 armada_updatel(dumb_ctrl, 116 ~(CFG_INV_CSYNC | CFG_INV_HSYNC | CFG_INV_VSYNC), 117 dcrtc->base + LCD_SPU_DUMB_CTRL); 118 } 119 120 static void armada_drm_crtc_queue_state_event(struct drm_crtc *crtc) 121 { 122 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 123 struct drm_pending_vblank_event *event; 124 125 /* If we have an event, we need vblank events enabled */ 126 event = xchg(&crtc->state->event, NULL); 127 if (event) { 128 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 129 dcrtc->event = event; 130 } 131 } 132 133 static void armada_drm_update_gamma(struct drm_crtc *crtc) 134 { 135 struct drm_property_blob *blob = crtc->state->gamma_lut; 136 void __iomem *base = drm_to_armada_crtc(crtc)->base; 137 int i; 138 139 if (blob) { 140 struct drm_color_lut *lut = blob->data; 141 142 armada_updatel(CFG_CSB_256x8, CFG_CSB_256x8 | CFG_PDWN256x8, 143 base + LCD_SPU_SRAM_PARA1); 144 145 for (i = 0; i < 256; i++) { 146 writel_relaxed(drm_color_lut_extract(lut[i].red, 8), 147 base + LCD_SPU_SRAM_WRDAT); 148 writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_YR, 149 base + LCD_SPU_SRAM_CTRL); 150 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 151 writel_relaxed(drm_color_lut_extract(lut[i].green, 8), 152 base + LCD_SPU_SRAM_WRDAT); 153 writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_UG, 154 base + LCD_SPU_SRAM_CTRL); 155 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 156 writel_relaxed(drm_color_lut_extract(lut[i].blue, 8), 157 base + LCD_SPU_SRAM_WRDAT); 158 writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_VB, 159 base + LCD_SPU_SRAM_CTRL); 160 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 161 } 162 armada_updatel(CFG_GAMMA_ENA, CFG_GAMMA_ENA, 163 base + LCD_SPU_DMA_CTRL0); 164 } else { 165 armada_updatel(0, CFG_GAMMA_ENA, base + LCD_SPU_DMA_CTRL0); 166 armada_updatel(CFG_PDWN256x8, CFG_CSB_256x8 | CFG_PDWN256x8, 167 base + LCD_SPU_SRAM_PARA1); 168 } 169 } 170 171 static enum drm_mode_status armada_drm_crtc_mode_valid(struct drm_crtc *crtc, 172 const struct drm_display_mode *mode) 173 { 174 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 175 176 if (mode->vscan > 1) 177 return MODE_NO_VSCAN; 178 179 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 180 return MODE_NO_DBLESCAN; 181 182 if (mode->flags & DRM_MODE_FLAG_HSKEW) 183 return MODE_H_ILLEGAL; 184 185 /* We can't do interlaced modes if we don't have the SPU_ADV_REG */ 186 if (!dcrtc->variant->has_spu_adv_reg && 187 mode->flags & DRM_MODE_FLAG_INTERLACE) 188 return MODE_NO_INTERLACE; 189 190 if (mode->flags & (DRM_MODE_FLAG_BCAST | DRM_MODE_FLAG_PIXMUX | 191 DRM_MODE_FLAG_CLKDIV2)) 192 return MODE_BAD; 193 194 return MODE_OK; 195 } 196 197 /* The mode_config.mutex will be held for this call */ 198 static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc, 199 const struct drm_display_mode *mode, struct drm_display_mode *adj) 200 { 201 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 202 int ret; 203 204 /* 205 * Set CRTC modesetting parameters for the adjusted mode. This is 206 * applied after the connectors, bridges, and encoders have fixed up 207 * this mode, as described above drm_atomic_helper_check_modeset(). 208 */ 209 drm_mode_set_crtcinfo(adj, CRTC_INTERLACE_HALVE_V); 210 211 /* 212 * Validate the adjusted mode in case an encoder/bridge has set 213 * something we don't support. 214 */ 215 if (armada_drm_crtc_mode_valid(crtc, adj) != MODE_OK) 216 return false; 217 218 /* Check whether the display mode is possible */ 219 ret = dcrtc->variant->compute_clock(dcrtc, adj, NULL); 220 if (ret) 221 return false; 222 223 return true; 224 } 225 226 /* These are locked by dev->vbl_lock */ 227 static void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask) 228 { 229 if (dcrtc->irq_ena & mask) { 230 dcrtc->irq_ena &= ~mask; 231 writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 232 } 233 } 234 235 static void armada_drm_crtc_enable_irq(struct armada_crtc *dcrtc, u32 mask) 236 { 237 if ((dcrtc->irq_ena & mask) != mask) { 238 dcrtc->irq_ena |= mask; 239 writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 240 if (readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR) & mask) 241 writel(0, dcrtc->base + LCD_SPU_IRQ_ISR); 242 } 243 } 244 245 static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat) 246 { 247 struct drm_pending_vblank_event *event; 248 void __iomem *base = dcrtc->base; 249 250 if (stat & DMA_FF_UNDERFLOW) 251 DRM_ERROR("video underflow on crtc %u\n", dcrtc->num); 252 if (stat & GRA_FF_UNDERFLOW) 253 DRM_ERROR("graphics underflow on crtc %u\n", dcrtc->num); 254 255 if (stat & VSYNC_IRQ) 256 drm_crtc_handle_vblank(&dcrtc->crtc); 257 258 spin_lock(&dcrtc->irq_lock); 259 if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) { 260 int i = stat & GRA_FRAME_IRQ0 ? 0 : 1; 261 uint32_t val; 262 263 writel_relaxed(dcrtc->v[i].spu_v_porch, base + LCD_SPU_V_PORCH); 264 writel_relaxed(dcrtc->v[i].spu_v_h_total, 265 base + LCD_SPUT_V_H_TOTAL); 266 267 val = readl_relaxed(base + LCD_SPU_ADV_REG); 268 val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN); 269 val |= dcrtc->v[i].spu_adv_reg; 270 writel_relaxed(val, base + LCD_SPU_ADV_REG); 271 } 272 273 if (stat & dcrtc->irq_ena & DUMB_FRAMEDONE) { 274 if (dcrtc->update_pending) { 275 armada_drm_crtc_update_regs(dcrtc, dcrtc->regs); 276 dcrtc->update_pending = false; 277 } 278 if (dcrtc->cursor_update) { 279 writel_relaxed(dcrtc->cursor_hw_pos, 280 base + LCD_SPU_HWC_OVSA_HPXL_VLN); 281 writel_relaxed(dcrtc->cursor_hw_sz, 282 base + LCD_SPU_HWC_HPXL_VLN); 283 armada_updatel(CFG_HWC_ENA, 284 CFG_HWC_ENA | CFG_HWC_1BITMOD | 285 CFG_HWC_1BITENA, 286 base + LCD_SPU_DMA_CTRL0); 287 dcrtc->cursor_update = false; 288 } 289 armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 290 } 291 spin_unlock(&dcrtc->irq_lock); 292 293 if (stat & VSYNC_IRQ && !dcrtc->update_pending) { 294 event = xchg(&dcrtc->event, NULL); 295 if (event) { 296 spin_lock(&dcrtc->crtc.dev->event_lock); 297 drm_crtc_send_vblank_event(&dcrtc->crtc, event); 298 spin_unlock(&dcrtc->crtc.dev->event_lock); 299 drm_crtc_vblank_put(&dcrtc->crtc); 300 } 301 } 302 } 303 304 static irqreturn_t armada_drm_irq(int irq, void *arg) 305 { 306 struct armada_crtc *dcrtc = arg; 307 u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR); 308 309 /* 310 * Reading the ISR appears to clear bits provided CLEAN_SPU_IRQ_ISR 311 * is set. Writing has some other effect to acknowledge the IRQ - 312 * without this, we only get a single IRQ. 313 */ 314 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR); 315 316 trace_armada_drm_irq(&dcrtc->crtc, stat); 317 318 /* Mask out those interrupts we haven't enabled */ 319 v = stat & dcrtc->irq_ena; 320 321 if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) { 322 armada_drm_crtc_irq(dcrtc, stat); 323 return IRQ_HANDLED; 324 } 325 return IRQ_NONE; 326 } 327 328 /* The mode_config.mutex will be held for this call */ 329 static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc) 330 { 331 struct drm_display_mode *adj = &crtc->state->adjusted_mode; 332 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 333 struct armada_regs regs[17]; 334 uint32_t lm, rm, tm, bm, val, sclk; 335 unsigned long flags; 336 unsigned i; 337 bool interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE); 338 339 i = 0; 340 rm = adj->crtc_hsync_start - adj->crtc_hdisplay; 341 lm = adj->crtc_htotal - adj->crtc_hsync_end; 342 bm = adj->crtc_vsync_start - adj->crtc_vdisplay; 343 tm = adj->crtc_vtotal - adj->crtc_vsync_end; 344 345 DRM_DEBUG_KMS("[CRTC:%d:%s] mode " DRM_MODE_FMT "\n", 346 crtc->base.id, crtc->name, DRM_MODE_ARG(adj)); 347 DRM_DEBUG_KMS("lm %d rm %d tm %d bm %d\n", lm, rm, tm, bm); 348 349 /* Now compute the divider for real */ 350 dcrtc->variant->compute_clock(dcrtc, adj, &sclk); 351 352 armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV); 353 354 spin_lock_irqsave(&dcrtc->irq_lock, flags); 355 356 dcrtc->interlaced = interlaced; 357 /* Even interlaced/progressive frame */ 358 dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 | 359 adj->crtc_htotal; 360 dcrtc->v[1].spu_v_porch = tm << 16 | bm; 361 val = adj->crtc_hsync_start; 362 dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN; 363 364 if (interlaced) { 365 /* Odd interlaced frame */ 366 val -= adj->crtc_htotal / 2; 367 dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN; 368 dcrtc->v[0].spu_v_h_total = dcrtc->v[1].spu_v_h_total + 369 (1 << 16); 370 dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1; 371 } else { 372 dcrtc->v[0] = dcrtc->v[1]; 373 } 374 375 val = adj->crtc_vdisplay << 16 | adj->crtc_hdisplay; 376 377 armada_reg_queue_set(regs, i, val, LCD_SPU_V_H_ACTIVE); 378 armada_reg_queue_set(regs, i, (lm << 16) | rm, LCD_SPU_H_PORCH); 379 armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_porch, LCD_SPU_V_PORCH); 380 armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total, 381 LCD_SPUT_V_H_TOTAL); 382 383 if (dcrtc->variant->has_spu_adv_reg) 384 armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg, 385 ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | 386 ADV_VSYNCOFFEN, LCD_SPU_ADV_REG); 387 388 val = adj->flags & DRM_MODE_FLAG_NVSYNC ? CFG_VSYNC_INV : 0; 389 armada_reg_queue_mod(regs, i, val, CFG_VSYNC_INV, LCD_SPU_DMA_CTRL1); 390 391 /* 392 * The documentation doesn't indicate what the normal state of 393 * the sync signals are. Sebastian Hesselbart kindly probed 394 * these signals on his board to determine their state. 395 * 396 * The non-inverted state of the sync signals is active high. 397 * Setting these bits makes the appropriate signal active low. 398 */ 399 val = 0; 400 if (adj->flags & DRM_MODE_FLAG_NCSYNC) 401 val |= CFG_INV_CSYNC; 402 if (adj->flags & DRM_MODE_FLAG_NHSYNC) 403 val |= CFG_INV_HSYNC; 404 if (adj->flags & DRM_MODE_FLAG_NVSYNC) 405 val |= CFG_INV_VSYNC; 406 armada_reg_queue_mod(regs, i, val, CFG_INV_CSYNC | CFG_INV_HSYNC | 407 CFG_INV_VSYNC, LCD_SPU_DUMB_CTRL); 408 armada_reg_queue_end(regs, i); 409 410 armada_drm_crtc_update_regs(dcrtc, regs); 411 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 412 } 413 414 static int armada_drm_crtc_atomic_check(struct drm_crtc *crtc, 415 struct drm_atomic_state *state) 416 { 417 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 418 crtc); 419 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 420 421 if (crtc_state->gamma_lut && drm_color_lut_size(crtc_state->gamma_lut) != 256) 422 return -EINVAL; 423 424 if (crtc_state->color_mgmt_changed) 425 crtc_state->planes_changed = true; 426 427 return 0; 428 } 429 430 static void armada_drm_crtc_atomic_begin(struct drm_crtc *crtc, 431 struct drm_atomic_state *state) 432 { 433 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 434 crtc); 435 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 436 437 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 438 439 if (crtc_state->color_mgmt_changed) 440 armada_drm_update_gamma(crtc); 441 442 dcrtc->regs_idx = 0; 443 dcrtc->regs = dcrtc->atomic_regs; 444 } 445 446 static void armada_drm_crtc_atomic_flush(struct drm_crtc *crtc, 447 struct drm_atomic_state *state) 448 { 449 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 450 crtc); 451 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 452 453 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 454 455 armada_reg_queue_end(dcrtc->regs, dcrtc->regs_idx); 456 457 /* 458 * If we aren't doing a full modeset, then we need to queue 459 * the event here. 460 */ 461 if (!drm_atomic_crtc_needs_modeset(crtc_state)) { 462 dcrtc->update_pending = true; 463 armada_drm_crtc_queue_state_event(crtc); 464 spin_lock_irq(&dcrtc->irq_lock); 465 armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 466 spin_unlock_irq(&dcrtc->irq_lock); 467 } else { 468 spin_lock_irq(&dcrtc->irq_lock); 469 armada_drm_crtc_update_regs(dcrtc, dcrtc->regs); 470 spin_unlock_irq(&dcrtc->irq_lock); 471 } 472 } 473 474 static void armada_drm_crtc_atomic_disable(struct drm_crtc *crtc, 475 struct drm_atomic_state *state) 476 { 477 struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state, 478 crtc); 479 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 480 struct drm_pending_vblank_event *event; 481 482 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 483 484 if (old_state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) 485 drm_crtc_vblank_put(crtc); 486 487 drm_crtc_vblank_off(crtc); 488 armada_drm_crtc_update(dcrtc, false); 489 490 if (!crtc->state->active) { 491 /* 492 * This modeset will be leaving the CRTC disabled, so 493 * call the backend to disable upstream clocks etc. 494 */ 495 if (dcrtc->variant->disable) 496 dcrtc->variant->disable(dcrtc); 497 498 /* 499 * We will not receive any further vblank events. 500 * Send the flip_done event manually. 501 */ 502 event = crtc->state->event; 503 crtc->state->event = NULL; 504 if (event) { 505 spin_lock_irq(&crtc->dev->event_lock); 506 drm_crtc_send_vblank_event(crtc, event); 507 spin_unlock_irq(&crtc->dev->event_lock); 508 } 509 } 510 } 511 512 static void armada_drm_crtc_atomic_enable(struct drm_crtc *crtc, 513 struct drm_atomic_state *state) 514 { 515 struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state, 516 crtc); 517 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 518 519 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 520 521 if (!old_state->active) { 522 /* 523 * This modeset is enabling the CRTC after it having 524 * been disabled. Reverse the call to ->disable in 525 * the atomic_disable(). 526 */ 527 if (dcrtc->variant->enable) 528 dcrtc->variant->enable(dcrtc, &crtc->state->adjusted_mode); 529 } 530 armada_drm_crtc_update(dcrtc, true); 531 drm_crtc_vblank_on(crtc); 532 533 if (crtc->state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) 534 WARN_ON(drm_crtc_vblank_get(crtc)); 535 536 armada_drm_crtc_queue_state_event(crtc); 537 } 538 539 static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = { 540 .mode_valid = armada_drm_crtc_mode_valid, 541 .mode_fixup = armada_drm_crtc_mode_fixup, 542 .mode_set_nofb = armada_drm_crtc_mode_set_nofb, 543 .atomic_check = armada_drm_crtc_atomic_check, 544 .atomic_begin = armada_drm_crtc_atomic_begin, 545 .atomic_flush = armada_drm_crtc_atomic_flush, 546 .atomic_disable = armada_drm_crtc_atomic_disable, 547 .atomic_enable = armada_drm_crtc_atomic_enable, 548 }; 549 550 static void armada_load_cursor_argb(void __iomem *base, uint32_t *pix, 551 unsigned stride, unsigned width, unsigned height) 552 { 553 uint32_t addr; 554 unsigned y; 555 556 addr = SRAM_HWC32_RAM1; 557 for (y = 0; y < height; y++) { 558 uint32_t *p = &pix[y * stride]; 559 unsigned x; 560 561 for (x = 0; x < width; x++, p++) { 562 uint32_t val = *p; 563 564 /* 565 * In "ARGB888" (HWC32) mode, writing to the SRAM 566 * requires these bits to contain: 567 * 31:24 = alpha 23:16 = blue 15:8 = green 7:0 = red 568 * So, it's actually ABGR8888. This is independent 569 * of the SWAPRB bits in DMA control register 0. 570 */ 571 val = (val & 0xff00ff00) | 572 (val & 0x000000ff) << 16 | 573 (val & 0x00ff0000) >> 16; 574 575 writel_relaxed(val, 576 base + LCD_SPU_SRAM_WRDAT); 577 writel_relaxed(addr | SRAM_WRITE, 578 base + LCD_SPU_SRAM_CTRL); 579 readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN); 580 addr += 1; 581 if ((addr & 0x00ff) == 0) 582 addr += 0xf00; 583 if ((addr & 0x30ff) == 0) 584 addr = SRAM_HWC32_RAM2; 585 } 586 } 587 } 588 589 static void armada_drm_crtc_cursor_tran(void __iomem *base) 590 { 591 unsigned addr; 592 593 for (addr = 0; addr < 256; addr++) { 594 /* write the default value */ 595 writel_relaxed(0x55555555, base + LCD_SPU_SRAM_WRDAT); 596 writel_relaxed(addr | SRAM_WRITE | SRAM_HWC32_TRAN, 597 base + LCD_SPU_SRAM_CTRL); 598 } 599 } 600 601 static int armada_drm_crtc_cursor_update(struct armada_crtc *dcrtc, bool reload) 602 { 603 uint32_t xoff, xscr, w = dcrtc->cursor_w, s; 604 uint32_t yoff, yscr, h = dcrtc->cursor_h; 605 uint32_t para1; 606 607 /* 608 * Calculate the visible width and height of the cursor, 609 * screen position, and the position in the cursor bitmap. 610 */ 611 if (dcrtc->cursor_x < 0) { 612 xoff = -dcrtc->cursor_x; 613 xscr = 0; 614 w -= min(xoff, w); 615 } else if (dcrtc->cursor_x + w > dcrtc->crtc.mode.hdisplay) { 616 xoff = 0; 617 xscr = dcrtc->cursor_x; 618 w = max_t(int, dcrtc->crtc.mode.hdisplay - dcrtc->cursor_x, 0); 619 } else { 620 xoff = 0; 621 xscr = dcrtc->cursor_x; 622 } 623 624 if (dcrtc->cursor_y < 0) { 625 yoff = -dcrtc->cursor_y; 626 yscr = 0; 627 h -= min(yoff, h); 628 } else if (dcrtc->cursor_y + h > dcrtc->crtc.mode.vdisplay) { 629 yoff = 0; 630 yscr = dcrtc->cursor_y; 631 h = max_t(int, dcrtc->crtc.mode.vdisplay - dcrtc->cursor_y, 0); 632 } else { 633 yoff = 0; 634 yscr = dcrtc->cursor_y; 635 } 636 637 /* On interlaced modes, the vertical cursor size must be halved */ 638 s = dcrtc->cursor_w; 639 if (dcrtc->interlaced) { 640 s *= 2; 641 yscr /= 2; 642 h /= 2; 643 } 644 645 if (!dcrtc->cursor_obj || !h || !w) { 646 spin_lock_irq(&dcrtc->irq_lock); 647 dcrtc->cursor_update = false; 648 armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0); 649 spin_unlock_irq(&dcrtc->irq_lock); 650 return 0; 651 } 652 653 spin_lock_irq(&dcrtc->irq_lock); 654 para1 = readl_relaxed(dcrtc->base + LCD_SPU_SRAM_PARA1); 655 armada_updatel(CFG_CSB_256x32, CFG_CSB_256x32 | CFG_PDWN256x32, 656 dcrtc->base + LCD_SPU_SRAM_PARA1); 657 spin_unlock_irq(&dcrtc->irq_lock); 658 659 /* 660 * Initialize the transparency if the SRAM was powered down. 661 * We must also reload the cursor data as well. 662 */ 663 if (!(para1 & CFG_CSB_256x32)) { 664 armada_drm_crtc_cursor_tran(dcrtc->base); 665 reload = true; 666 } 667 668 if (dcrtc->cursor_hw_sz != (h << 16 | w)) { 669 spin_lock_irq(&dcrtc->irq_lock); 670 dcrtc->cursor_update = false; 671 armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0); 672 spin_unlock_irq(&dcrtc->irq_lock); 673 reload = true; 674 } 675 if (reload) { 676 struct armada_gem_object *obj = dcrtc->cursor_obj; 677 uint32_t *pix; 678 /* Set the top-left corner of the cursor image */ 679 pix = obj->addr; 680 pix += yoff * s + xoff; 681 armada_load_cursor_argb(dcrtc->base, pix, s, w, h); 682 } 683 684 /* Reload the cursor position, size and enable in the IRQ handler */ 685 spin_lock_irq(&dcrtc->irq_lock); 686 dcrtc->cursor_hw_pos = yscr << 16 | xscr; 687 dcrtc->cursor_hw_sz = h << 16 | w; 688 dcrtc->cursor_update = true; 689 armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA); 690 spin_unlock_irq(&dcrtc->irq_lock); 691 692 return 0; 693 } 694 695 static void cursor_update(void *data) 696 { 697 armada_drm_crtc_cursor_update(data, true); 698 } 699 700 static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc, 701 struct drm_file *file, uint32_t handle, uint32_t w, uint32_t h) 702 { 703 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 704 struct armada_gem_object *obj = NULL; 705 int ret; 706 707 /* If no cursor support, replicate drm's return value */ 708 if (!dcrtc->variant->has_spu_adv_reg) 709 return -ENXIO; 710 711 if (handle && w > 0 && h > 0) { 712 /* maximum size is 64x32 or 32x64 */ 713 if (w > 64 || h > 64 || (w > 32 && h > 32)) 714 return -ENOMEM; 715 716 obj = armada_gem_object_lookup(file, handle); 717 if (!obj) 718 return -ENOENT; 719 720 /* Must be a kernel-mapped object */ 721 if (!obj->addr) { 722 drm_gem_object_put(&obj->obj); 723 return -EINVAL; 724 } 725 726 if (obj->obj.size < w * h * 4) { 727 DRM_ERROR("buffer is too small\n"); 728 drm_gem_object_put(&obj->obj); 729 return -ENOMEM; 730 } 731 } 732 733 if (dcrtc->cursor_obj) { 734 dcrtc->cursor_obj->update = NULL; 735 dcrtc->cursor_obj->update_data = NULL; 736 drm_gem_object_put(&dcrtc->cursor_obj->obj); 737 } 738 dcrtc->cursor_obj = obj; 739 dcrtc->cursor_w = w; 740 dcrtc->cursor_h = h; 741 ret = armada_drm_crtc_cursor_update(dcrtc, true); 742 if (obj) { 743 obj->update_data = dcrtc; 744 obj->update = cursor_update; 745 } 746 747 return ret; 748 } 749 750 static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y) 751 { 752 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 753 int ret; 754 755 /* If no cursor support, replicate drm's return value */ 756 if (!dcrtc->variant->has_spu_adv_reg) 757 return -EFAULT; 758 759 dcrtc->cursor_x = x; 760 dcrtc->cursor_y = y; 761 ret = armada_drm_crtc_cursor_update(dcrtc, false); 762 763 return ret; 764 } 765 766 static void armada_drm_crtc_destroy(struct drm_crtc *crtc) 767 { 768 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 769 struct armada_private *priv = drm_to_armada_dev(crtc->dev); 770 771 if (dcrtc->cursor_obj) 772 drm_gem_object_put(&dcrtc->cursor_obj->obj); 773 774 priv->dcrtc[dcrtc->num] = NULL; 775 drm_crtc_cleanup(&dcrtc->crtc); 776 777 if (dcrtc->variant->disable) 778 dcrtc->variant->disable(dcrtc); 779 780 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA); 781 782 of_node_put(dcrtc->crtc.port); 783 784 kfree(dcrtc); 785 } 786 787 static int armada_drm_crtc_late_register(struct drm_crtc *crtc) 788 { 789 if (IS_ENABLED(CONFIG_DEBUG_FS)) 790 armada_drm_crtc_debugfs_init(drm_to_armada_crtc(crtc)); 791 792 return 0; 793 } 794 795 /* These are called under the vbl_lock. */ 796 static int armada_drm_crtc_enable_vblank(struct drm_crtc *crtc) 797 { 798 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 799 unsigned long flags; 800 801 spin_lock_irqsave(&dcrtc->irq_lock, flags); 802 armada_drm_crtc_enable_irq(dcrtc, VSYNC_IRQ_ENA); 803 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 804 return 0; 805 } 806 807 static void armada_drm_crtc_disable_vblank(struct drm_crtc *crtc) 808 { 809 struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc); 810 unsigned long flags; 811 812 spin_lock_irqsave(&dcrtc->irq_lock, flags); 813 armada_drm_crtc_disable_irq(dcrtc, VSYNC_IRQ_ENA); 814 spin_unlock_irqrestore(&dcrtc->irq_lock, flags); 815 } 816 817 static const struct drm_crtc_funcs armada_crtc_funcs = { 818 .reset = drm_atomic_helper_crtc_reset, 819 .cursor_set = armada_drm_crtc_cursor_set, 820 .cursor_move = armada_drm_crtc_cursor_move, 821 .destroy = armada_drm_crtc_destroy, 822 .set_config = drm_atomic_helper_set_config, 823 .page_flip = drm_atomic_helper_page_flip, 824 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 825 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 826 .late_register = armada_drm_crtc_late_register, 827 .enable_vblank = armada_drm_crtc_enable_vblank, 828 .disable_vblank = armada_drm_crtc_disable_vblank, 829 }; 830 831 int armada_crtc_select_clock(struct armada_crtc *dcrtc, 832 struct armada_clk_result *res, 833 const struct armada_clocking_params *params, 834 struct clk *clks[], size_t num_clks, 835 unsigned long desired_khz) 836 { 837 unsigned long desired_hz = desired_khz * 1000; 838 unsigned long desired_clk_hz; // requested clk input 839 unsigned long real_clk_hz; // actual clk input 840 unsigned long real_hz; // actual pixel clk 841 unsigned long permillage; 842 struct clk *clk; 843 u32 div; 844 int i; 845 846 DRM_DEBUG_KMS("[CRTC:%u:%s] desired clock=%luHz\n", 847 dcrtc->crtc.base.id, dcrtc->crtc.name, desired_hz); 848 849 for (i = 0; i < num_clks; i++) { 850 clk = clks[i]; 851 if (!clk) 852 continue; 853 854 if (params->settable & BIT(i)) { 855 real_clk_hz = clk_round_rate(clk, desired_hz); 856 desired_clk_hz = desired_hz; 857 } else { 858 real_clk_hz = clk_get_rate(clk); 859 desired_clk_hz = real_clk_hz; 860 } 861 862 /* If the clock can do exactly the desired rate, we're done */ 863 if (real_clk_hz == desired_hz) { 864 real_hz = real_clk_hz; 865 div = 1; 866 goto found; 867 } 868 869 /* Calculate the divider - if invalid, we can't do this rate */ 870 div = DIV_ROUND_CLOSEST(real_clk_hz, desired_hz); 871 if (div == 0 || div > params->div_max) 872 continue; 873 874 /* Calculate the actual rate - HDMI requires -0.6%..+0.5% */ 875 real_hz = DIV_ROUND_CLOSEST(real_clk_hz, div); 876 877 DRM_DEBUG_KMS("[CRTC:%u:%s] clk=%u %luHz div=%u real=%luHz\n", 878 dcrtc->crtc.base.id, dcrtc->crtc.name, 879 i, real_clk_hz, div, real_hz); 880 881 /* Avoid repeated division */ 882 if (real_hz < desired_hz) { 883 permillage = real_hz / desired_khz; 884 if (permillage < params->permillage_min) 885 continue; 886 } else { 887 permillage = DIV_ROUND_UP(real_hz, desired_khz); 888 if (permillage > params->permillage_max) 889 continue; 890 } 891 goto found; 892 } 893 894 return -ERANGE; 895 896 found: 897 DRM_DEBUG_KMS("[CRTC:%u:%s] selected clk=%u %luHz div=%u real=%luHz\n", 898 dcrtc->crtc.base.id, dcrtc->crtc.name, 899 i, real_clk_hz, div, real_hz); 900 901 res->desired_clk_hz = desired_clk_hz; 902 res->clk = clk; 903 res->div = div; 904 905 return i; 906 } 907 908 static int armada_drm_crtc_create(struct drm_device *drm, struct device *dev, 909 struct resource *res, int irq, const struct armada_variant *variant, 910 struct device_node *port) 911 { 912 struct armada_private *priv = drm_to_armada_dev(drm); 913 struct armada_crtc *dcrtc; 914 struct drm_plane *primary; 915 void __iomem *base; 916 int ret; 917 918 base = devm_ioremap_resource(dev, res); 919 if (IS_ERR(base)) 920 return PTR_ERR(base); 921 922 dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL); 923 if (!dcrtc) { 924 DRM_ERROR("failed to allocate Armada crtc\n"); 925 return -ENOMEM; 926 } 927 928 if (dev != drm->dev) 929 dev_set_drvdata(dev, dcrtc); 930 931 dcrtc->variant = variant; 932 dcrtc->base = base; 933 dcrtc->num = drm->mode_config.num_crtc; 934 dcrtc->cfg_dumb_ctrl = DUMB24_RGB888_0; 935 dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24; 936 spin_lock_init(&dcrtc->irq_lock); 937 dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR; 938 939 /* Initialize some registers which we don't otherwise set */ 940 writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV); 941 writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_BLANKCOLOR); 942 writel_relaxed(dcrtc->spu_iopad_ctrl, 943 dcrtc->base + LCD_SPU_IOPAD_CONTROL); 944 writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_SRAM_PARA0); 945 writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 | 946 CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 | 947 CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1); 948 writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1); 949 writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA); 950 readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR); 951 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR); 952 953 ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc", 954 dcrtc); 955 if (ret < 0) 956 goto err_crtc; 957 958 if (dcrtc->variant->init) { 959 ret = dcrtc->variant->init(dcrtc, dev); 960 if (ret) 961 goto err_crtc; 962 } 963 964 /* Ensure AXI pipeline is enabled */ 965 armada_updatel(CFG_ARBFAST_ENA, 0, dcrtc->base + LCD_SPU_DMA_CTRL0); 966 967 priv->dcrtc[dcrtc->num] = dcrtc; 968 969 dcrtc->crtc.port = port; 970 971 primary = kzalloc(sizeof(*primary), GFP_KERNEL); 972 if (!primary) { 973 ret = -ENOMEM; 974 goto err_crtc; 975 } 976 977 ret = armada_drm_primary_plane_init(drm, primary); 978 if (ret) { 979 kfree(primary); 980 goto err_crtc; 981 } 982 983 ret = drm_crtc_init_with_planes(drm, &dcrtc->crtc, primary, NULL, 984 &armada_crtc_funcs, NULL); 985 if (ret) 986 goto err_crtc_init; 987 988 drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs); 989 990 ret = drm_mode_crtc_set_gamma_size(&dcrtc->crtc, 256); 991 if (ret) 992 return ret; 993 994 drm_crtc_enable_color_mgmt(&dcrtc->crtc, 0, false, 256); 995 996 return armada_overlay_plane_create(drm, 1 << dcrtc->num); 997 998 err_crtc_init: 999 primary->funcs->destroy(primary); 1000 err_crtc: 1001 kfree(dcrtc); 1002 1003 return ret; 1004 } 1005 1006 static int 1007 armada_lcd_bind(struct device *dev, struct device *master, void *data) 1008 { 1009 struct platform_device *pdev = to_platform_device(dev); 1010 struct drm_device *drm = data; 1011 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1012 int irq = platform_get_irq(pdev, 0); 1013 const struct armada_variant *variant; 1014 struct device_node *port = NULL; 1015 1016 if (irq < 0) 1017 return irq; 1018 1019 if (!dev->of_node) { 1020 const struct platform_device_id *id; 1021 1022 id = platform_get_device_id(pdev); 1023 if (!id) 1024 return -ENXIO; 1025 1026 variant = (const struct armada_variant *)id->driver_data; 1027 } else { 1028 const struct of_device_id *match; 1029 struct device_node *np, *parent = dev->of_node; 1030 1031 match = of_match_device(dev->driver->of_match_table, dev); 1032 if (!match) 1033 return -ENXIO; 1034 1035 np = of_get_child_by_name(parent, "ports"); 1036 if (np) 1037 parent = np; 1038 port = of_get_child_by_name(parent, "port"); 1039 of_node_put(np); 1040 if (!port) { 1041 dev_err(dev, "no port node found in %pOF\n", parent); 1042 return -ENXIO; 1043 } 1044 1045 variant = match->data; 1046 } 1047 1048 return armada_drm_crtc_create(drm, dev, res, irq, variant, port); 1049 } 1050 1051 static void 1052 armada_lcd_unbind(struct device *dev, struct device *master, void *data) 1053 { 1054 struct armada_crtc *dcrtc = dev_get_drvdata(dev); 1055 1056 armada_drm_crtc_destroy(&dcrtc->crtc); 1057 } 1058 1059 static const struct component_ops armada_lcd_ops = { 1060 .bind = armada_lcd_bind, 1061 .unbind = armada_lcd_unbind, 1062 }; 1063 1064 static int armada_lcd_probe(struct platform_device *pdev) 1065 { 1066 return component_add(&pdev->dev, &armada_lcd_ops); 1067 } 1068 1069 static int armada_lcd_remove(struct platform_device *pdev) 1070 { 1071 component_del(&pdev->dev, &armada_lcd_ops); 1072 return 0; 1073 } 1074 1075 static const struct of_device_id armada_lcd_of_match[] = { 1076 { 1077 .compatible = "marvell,dove-lcd", 1078 .data = &armada510_ops, 1079 }, 1080 {} 1081 }; 1082 MODULE_DEVICE_TABLE(of, armada_lcd_of_match); 1083 1084 static const struct platform_device_id armada_lcd_platform_ids[] = { 1085 { 1086 .name = "armada-lcd", 1087 .driver_data = (unsigned long)&armada510_ops, 1088 }, { 1089 .name = "armada-510-lcd", 1090 .driver_data = (unsigned long)&armada510_ops, 1091 }, 1092 { }, 1093 }; 1094 MODULE_DEVICE_TABLE(platform, armada_lcd_platform_ids); 1095 1096 struct platform_driver armada_lcd_platform_driver = { 1097 .probe = armada_lcd_probe, 1098 .remove = armada_lcd_remove, 1099 .driver = { 1100 .name = "armada-lcd", 1101 .owner = THIS_MODULE, 1102 .of_match_table = armada_lcd_of_match, 1103 }, 1104 .id_table = armada_lcd_platform_ids, 1105 }; 1106