1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) STMicroelectronics SA 2014 4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> 5 * Fabien Dessenne <fabien.dessenne@st.com> 6 * for STMicroelectronics. 7 */ 8 9 #include <linux/dma-mapping.h> 10 #include <linux/of.h> 11 #include <linux/seq_file.h> 12 13 #include <drm/drm_atomic.h> 14 #include <drm/drm_device.h> 15 #include <drm/drm_fb_dma_helper.h> 16 #include <drm/drm_fourcc.h> 17 #include <drm/drm_framebuffer.h> 18 #include <drm/drm_gem_dma_helper.h> 19 20 #include "sti_compositor.h" 21 #include "sti_gdp.h" 22 #include "sti_plane.h" 23 #include "sti_vtg.h" 24 25 #define ALPHASWITCH BIT(6) 26 #define ENA_COLOR_FILL BIT(8) 27 #define BIGNOTLITTLE BIT(23) 28 #define WAIT_NEXT_VSYNC BIT(31) 29 30 /* GDP color formats */ 31 #define GDP_RGB565 0x00 32 #define GDP_RGB888 0x01 33 #define GDP_RGB888_32 0x02 34 #define GDP_XBGR8888 (GDP_RGB888_32 | BIGNOTLITTLE | ALPHASWITCH) 35 #define GDP_ARGB8565 0x04 36 #define GDP_ARGB8888 0x05 37 #define GDP_ABGR8888 (GDP_ARGB8888 | BIGNOTLITTLE | ALPHASWITCH) 38 #define GDP_ARGB1555 0x06 39 #define GDP_ARGB4444 0x07 40 41 #define GDP2STR(fmt) { GDP_ ## fmt, #fmt } 42 43 static struct gdp_format_to_str { 44 int format; 45 char name[20]; 46 } gdp_format_to_str[] = { 47 GDP2STR(RGB565), 48 GDP2STR(RGB888), 49 GDP2STR(RGB888_32), 50 GDP2STR(XBGR8888), 51 GDP2STR(ARGB8565), 52 GDP2STR(ARGB8888), 53 GDP2STR(ABGR8888), 54 GDP2STR(ARGB1555), 55 GDP2STR(ARGB4444) 56 }; 57 58 #define GAM_GDP_CTL_OFFSET 0x00 59 #define GAM_GDP_AGC_OFFSET 0x04 60 #define GAM_GDP_VPO_OFFSET 0x0C 61 #define GAM_GDP_VPS_OFFSET 0x10 62 #define GAM_GDP_PML_OFFSET 0x14 63 #define GAM_GDP_PMP_OFFSET 0x18 64 #define GAM_GDP_SIZE_OFFSET 0x1C 65 #define GAM_GDP_NVN_OFFSET 0x24 66 #define GAM_GDP_KEY1_OFFSET 0x28 67 #define GAM_GDP_KEY2_OFFSET 0x2C 68 #define GAM_GDP_PPT_OFFSET 0x34 69 #define GAM_GDP_CML_OFFSET 0x3C 70 #define GAM_GDP_MST_OFFSET 0x68 71 72 #define GAM_GDP_ALPHARANGE_255 BIT(5) 73 #define GAM_GDP_AGC_FULL_RANGE 0x00808080 74 #define GAM_GDP_PPT_IGNORE (BIT(1) | BIT(0)) 75 76 #define GAM_GDP_SIZE_MAX_WIDTH 3840 77 #define GAM_GDP_SIZE_MAX_HEIGHT 2160 78 79 #define GDP_NODE_NB_BANK 2 80 #define GDP_NODE_PER_FIELD 2 81 82 struct sti_gdp_node { 83 u32 gam_gdp_ctl; 84 u32 gam_gdp_agc; 85 u32 reserved1; 86 u32 gam_gdp_vpo; 87 u32 gam_gdp_vps; 88 u32 gam_gdp_pml; 89 u32 gam_gdp_pmp; 90 u32 gam_gdp_size; 91 u32 reserved2; 92 u32 gam_gdp_nvn; 93 u32 gam_gdp_key1; 94 u32 gam_gdp_key2; 95 u32 reserved3; 96 u32 gam_gdp_ppt; 97 u32 reserved4; 98 u32 gam_gdp_cml; 99 }; 100 101 struct sti_gdp_node_list { 102 struct sti_gdp_node *top_field; 103 dma_addr_t top_field_paddr; 104 struct sti_gdp_node *btm_field; 105 dma_addr_t btm_field_paddr; 106 }; 107 108 /* 109 * STI GDP structure 110 * 111 * @sti_plane: sti_plane structure 112 * @dev: driver device 113 * @regs: gdp registers 114 * @clk_pix: pixel clock for the current gdp 115 * @clk_main_parent: gdp parent clock if main path used 116 * @clk_aux_parent: gdp parent clock if aux path used 117 * @vtg_field_nb: callback for VTG FIELD (top or bottom) notification 118 * @is_curr_top: true if the current node processed is the top field 119 * @node_list: array of node list 120 * @vtg: registered vtg 121 */ 122 struct sti_gdp { 123 struct sti_plane plane; 124 struct device *dev; 125 void __iomem *regs; 126 struct clk *clk_pix; 127 struct clk *clk_main_parent; 128 struct clk *clk_aux_parent; 129 struct notifier_block vtg_field_nb; 130 bool is_curr_top; 131 struct sti_gdp_node_list node_list[GDP_NODE_NB_BANK]; 132 struct sti_vtg *vtg; 133 }; 134 135 #define to_sti_gdp(x) container_of(x, struct sti_gdp, plane) 136 137 static const uint32_t gdp_supported_formats[] = { 138 DRM_FORMAT_XRGB8888, 139 DRM_FORMAT_XBGR8888, 140 DRM_FORMAT_ARGB8888, 141 DRM_FORMAT_ABGR8888, 142 DRM_FORMAT_ARGB4444, 143 DRM_FORMAT_ARGB1555, 144 DRM_FORMAT_RGB565, 145 DRM_FORMAT_RGB888, 146 }; 147 148 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \ 149 readl(gdp->regs + reg ## _OFFSET)) 150 gdp_dbg_ctl(struct seq_file * s,int val)151 static void gdp_dbg_ctl(struct seq_file *s, int val) 152 { 153 int i; 154 155 seq_puts(s, "\tColor:"); 156 for (i = 0; i < ARRAY_SIZE(gdp_format_to_str); i++) { 157 if (gdp_format_to_str[i].format == (val & 0x1F)) { 158 seq_puts(s, gdp_format_to_str[i].name); 159 break; 160 } 161 } 162 if (i == ARRAY_SIZE(gdp_format_to_str)) 163 seq_puts(s, "<UNKNOWN>"); 164 165 seq_printf(s, "\tWaitNextVsync:%d", val & WAIT_NEXT_VSYNC ? 1 : 0); 166 } 167 gdp_dbg_vpo(struct seq_file * s,int val)168 static void gdp_dbg_vpo(struct seq_file *s, int val) 169 { 170 seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0xFFFF, (val >> 16) & 0xFFFF); 171 } 172 gdp_dbg_vps(struct seq_file * s,int val)173 static void gdp_dbg_vps(struct seq_file *s, int val) 174 { 175 seq_printf(s, "\txds:%4d\tyds:%4d", val & 0xFFFF, (val >> 16) & 0xFFFF); 176 } 177 gdp_dbg_size(struct seq_file * s,int val)178 static void gdp_dbg_size(struct seq_file *s, int val) 179 { 180 seq_printf(s, "\t%d x %d", val & 0xFFFF, (val >> 16) & 0xFFFF); 181 } 182 gdp_dbg_nvn(struct seq_file * s,struct sti_gdp * gdp,int val)183 static void gdp_dbg_nvn(struct seq_file *s, struct sti_gdp *gdp, int val) 184 { 185 void *base = NULL; 186 unsigned int i; 187 188 for (i = 0; i < GDP_NODE_NB_BANK; i++) { 189 if (gdp->node_list[i].top_field_paddr == val) { 190 base = gdp->node_list[i].top_field; 191 break; 192 } 193 if (gdp->node_list[i].btm_field_paddr == val) { 194 base = gdp->node_list[i].btm_field; 195 break; 196 } 197 } 198 199 if (base) 200 seq_printf(s, "\tVirt @: %p", base); 201 } 202 gdp_dbg_ppt(struct seq_file * s,int val)203 static void gdp_dbg_ppt(struct seq_file *s, int val) 204 { 205 if (val & GAM_GDP_PPT_IGNORE) 206 seq_puts(s, "\tNot displayed on mixer!"); 207 } 208 gdp_dbg_mst(struct seq_file * s,int val)209 static void gdp_dbg_mst(struct seq_file *s, int val) 210 { 211 if (val & 1) 212 seq_puts(s, "\tBUFFER UNDERFLOW!"); 213 } 214 gdp_dbg_show(struct seq_file * s,void * data)215 static int gdp_dbg_show(struct seq_file *s, void *data) 216 { 217 struct drm_info_node *node = s->private; 218 struct sti_gdp *gdp = (struct sti_gdp *)node->info_ent->data; 219 struct drm_plane *drm_plane = &gdp->plane.drm_plane; 220 struct drm_crtc *crtc; 221 222 drm_modeset_lock(&drm_plane->mutex, NULL); 223 crtc = drm_plane->state->crtc; 224 drm_modeset_unlock(&drm_plane->mutex); 225 226 seq_printf(s, "%s: (vaddr = 0x%p)", 227 sti_plane_to_str(&gdp->plane), gdp->regs); 228 229 DBGFS_DUMP(GAM_GDP_CTL); 230 gdp_dbg_ctl(s, readl(gdp->regs + GAM_GDP_CTL_OFFSET)); 231 DBGFS_DUMP(GAM_GDP_AGC); 232 DBGFS_DUMP(GAM_GDP_VPO); 233 gdp_dbg_vpo(s, readl(gdp->regs + GAM_GDP_VPO_OFFSET)); 234 DBGFS_DUMP(GAM_GDP_VPS); 235 gdp_dbg_vps(s, readl(gdp->regs + GAM_GDP_VPS_OFFSET)); 236 DBGFS_DUMP(GAM_GDP_PML); 237 DBGFS_DUMP(GAM_GDP_PMP); 238 DBGFS_DUMP(GAM_GDP_SIZE); 239 gdp_dbg_size(s, readl(gdp->regs + GAM_GDP_SIZE_OFFSET)); 240 DBGFS_DUMP(GAM_GDP_NVN); 241 gdp_dbg_nvn(s, gdp, readl(gdp->regs + GAM_GDP_NVN_OFFSET)); 242 DBGFS_DUMP(GAM_GDP_KEY1); 243 DBGFS_DUMP(GAM_GDP_KEY2); 244 DBGFS_DUMP(GAM_GDP_PPT); 245 gdp_dbg_ppt(s, readl(gdp->regs + GAM_GDP_PPT_OFFSET)); 246 DBGFS_DUMP(GAM_GDP_CML); 247 DBGFS_DUMP(GAM_GDP_MST); 248 gdp_dbg_mst(s, readl(gdp->regs + GAM_GDP_MST_OFFSET)); 249 250 seq_puts(s, "\n\n"); 251 if (!crtc) 252 seq_puts(s, " Not connected to any DRM CRTC\n"); 253 else 254 seq_printf(s, " Connected to DRM CRTC #%d (%s)\n", 255 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc))); 256 257 return 0; 258 } 259 gdp_node_dump_node(struct seq_file * s,struct sti_gdp_node * node)260 static void gdp_node_dump_node(struct seq_file *s, struct sti_gdp_node *node) 261 { 262 seq_printf(s, "\t@:0x%p", node); 263 seq_printf(s, "\n\tCTL 0x%08X", node->gam_gdp_ctl); 264 gdp_dbg_ctl(s, node->gam_gdp_ctl); 265 seq_printf(s, "\n\tAGC 0x%08X", node->gam_gdp_agc); 266 seq_printf(s, "\n\tVPO 0x%08X", node->gam_gdp_vpo); 267 gdp_dbg_vpo(s, node->gam_gdp_vpo); 268 seq_printf(s, "\n\tVPS 0x%08X", node->gam_gdp_vps); 269 gdp_dbg_vps(s, node->gam_gdp_vps); 270 seq_printf(s, "\n\tPML 0x%08X", node->gam_gdp_pml); 271 seq_printf(s, "\n\tPMP 0x%08X", node->gam_gdp_pmp); 272 seq_printf(s, "\n\tSIZE 0x%08X", node->gam_gdp_size); 273 gdp_dbg_size(s, node->gam_gdp_size); 274 seq_printf(s, "\n\tNVN 0x%08X", node->gam_gdp_nvn); 275 seq_printf(s, "\n\tKEY1 0x%08X", node->gam_gdp_key1); 276 seq_printf(s, "\n\tKEY2 0x%08X", node->gam_gdp_key2); 277 seq_printf(s, "\n\tPPT 0x%08X", node->gam_gdp_ppt); 278 gdp_dbg_ppt(s, node->gam_gdp_ppt); 279 seq_printf(s, "\n\tCML 0x%08X\n", node->gam_gdp_cml); 280 } 281 gdp_node_dbg_show(struct seq_file * s,void * arg)282 static int gdp_node_dbg_show(struct seq_file *s, void *arg) 283 { 284 struct drm_info_node *node = s->private; 285 struct sti_gdp *gdp = (struct sti_gdp *)node->info_ent->data; 286 unsigned int b; 287 288 for (b = 0; b < GDP_NODE_NB_BANK; b++) { 289 seq_printf(s, "\n%s[%d].top", sti_plane_to_str(&gdp->plane), b); 290 gdp_node_dump_node(s, gdp->node_list[b].top_field); 291 seq_printf(s, "\n%s[%d].btm", sti_plane_to_str(&gdp->plane), b); 292 gdp_node_dump_node(s, gdp->node_list[b].btm_field); 293 } 294 295 return 0; 296 } 297 298 static struct drm_info_list gdp0_debugfs_files[] = { 299 { "gdp0", gdp_dbg_show, 0, NULL }, 300 { "gdp0_node", gdp_node_dbg_show, 0, NULL }, 301 }; 302 303 static struct drm_info_list gdp1_debugfs_files[] = { 304 { "gdp1", gdp_dbg_show, 0, NULL }, 305 { "gdp1_node", gdp_node_dbg_show, 0, NULL }, 306 }; 307 308 static struct drm_info_list gdp2_debugfs_files[] = { 309 { "gdp2", gdp_dbg_show, 0, NULL }, 310 { "gdp2_node", gdp_node_dbg_show, 0, NULL }, 311 }; 312 313 static struct drm_info_list gdp3_debugfs_files[] = { 314 { "gdp3", gdp_dbg_show, 0, NULL }, 315 { "gdp3_node", gdp_node_dbg_show, 0, NULL }, 316 }; 317 gdp_debugfs_init(struct sti_gdp * gdp,struct drm_minor * minor)318 static int gdp_debugfs_init(struct sti_gdp *gdp, struct drm_minor *minor) 319 { 320 unsigned int i; 321 struct drm_info_list *gdp_debugfs_files; 322 int nb_files; 323 324 switch (gdp->plane.desc) { 325 case STI_GDP_0: 326 gdp_debugfs_files = gdp0_debugfs_files; 327 nb_files = ARRAY_SIZE(gdp0_debugfs_files); 328 break; 329 case STI_GDP_1: 330 gdp_debugfs_files = gdp1_debugfs_files; 331 nb_files = ARRAY_SIZE(gdp1_debugfs_files); 332 break; 333 case STI_GDP_2: 334 gdp_debugfs_files = gdp2_debugfs_files; 335 nb_files = ARRAY_SIZE(gdp2_debugfs_files); 336 break; 337 case STI_GDP_3: 338 gdp_debugfs_files = gdp3_debugfs_files; 339 nb_files = ARRAY_SIZE(gdp3_debugfs_files); 340 break; 341 default: 342 return -EINVAL; 343 } 344 345 for (i = 0; i < nb_files; i++) 346 gdp_debugfs_files[i].data = gdp; 347 348 drm_debugfs_create_files(gdp_debugfs_files, 349 nb_files, 350 minor->debugfs_root, minor); 351 return 0; 352 } 353 sti_gdp_fourcc2format(int fourcc)354 static int sti_gdp_fourcc2format(int fourcc) 355 { 356 switch (fourcc) { 357 case DRM_FORMAT_XRGB8888: 358 return GDP_RGB888_32; 359 case DRM_FORMAT_XBGR8888: 360 return GDP_XBGR8888; 361 case DRM_FORMAT_ARGB8888: 362 return GDP_ARGB8888; 363 case DRM_FORMAT_ABGR8888: 364 return GDP_ABGR8888; 365 case DRM_FORMAT_ARGB4444: 366 return GDP_ARGB4444; 367 case DRM_FORMAT_ARGB1555: 368 return GDP_ARGB1555; 369 case DRM_FORMAT_RGB565: 370 return GDP_RGB565; 371 case DRM_FORMAT_RGB888: 372 return GDP_RGB888; 373 } 374 return -1; 375 } 376 sti_gdp_get_alpharange(int format)377 static int sti_gdp_get_alpharange(int format) 378 { 379 switch (format) { 380 case GDP_ARGB8565: 381 case GDP_ARGB8888: 382 case GDP_ABGR8888: 383 return GAM_GDP_ALPHARANGE_255; 384 } 385 return 0; 386 } 387 388 /** 389 * sti_gdp_get_free_nodes 390 * @gdp: gdp pointer 391 * 392 * Look for a GDP node list that is not currently read by the HW. 393 * 394 * RETURNS: 395 * Pointer to the free GDP node list 396 */ sti_gdp_get_free_nodes(struct sti_gdp * gdp)397 static struct sti_gdp_node_list *sti_gdp_get_free_nodes(struct sti_gdp *gdp) 398 { 399 int hw_nvn; 400 unsigned int i; 401 402 hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET); 403 if (!hw_nvn) 404 goto end; 405 406 for (i = 0; i < GDP_NODE_NB_BANK; i++) 407 if ((hw_nvn != gdp->node_list[i].btm_field_paddr) && 408 (hw_nvn != gdp->node_list[i].top_field_paddr)) 409 return &gdp->node_list[i]; 410 411 /* in hazardous cases restart with the first node */ 412 DRM_ERROR("inconsistent NVN for %s: 0x%08X\n", 413 sti_plane_to_str(&gdp->plane), hw_nvn); 414 415 end: 416 return &gdp->node_list[0]; 417 } 418 419 /** 420 * sti_gdp_get_current_nodes 421 * @gdp: gdp pointer 422 * 423 * Look for GDP nodes that are currently read by the HW. 424 * 425 * RETURNS: 426 * Pointer to the current GDP node list 427 */ 428 static sti_gdp_get_current_nodes(struct sti_gdp * gdp)429 struct sti_gdp_node_list *sti_gdp_get_current_nodes(struct sti_gdp *gdp) 430 { 431 int hw_nvn; 432 unsigned int i; 433 434 hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET); 435 if (!hw_nvn) 436 goto end; 437 438 for (i = 0; i < GDP_NODE_NB_BANK; i++) 439 if ((hw_nvn == gdp->node_list[i].btm_field_paddr) || 440 (hw_nvn == gdp->node_list[i].top_field_paddr)) 441 return &gdp->node_list[i]; 442 443 end: 444 DRM_DEBUG_DRIVER("Warning, NVN 0x%08X for %s does not match any node\n", 445 hw_nvn, sti_plane_to_str(&gdp->plane)); 446 447 return NULL; 448 } 449 450 /** 451 * sti_gdp_disable 452 * @gdp: gdp pointer 453 * 454 * Disable a GDP. 455 */ sti_gdp_disable(struct sti_gdp * gdp)456 static void sti_gdp_disable(struct sti_gdp *gdp) 457 { 458 unsigned int i; 459 460 DRM_DEBUG_DRIVER("%s\n", sti_plane_to_str(&gdp->plane)); 461 462 /* Set the nodes as 'to be ignored on mixer' */ 463 for (i = 0; i < GDP_NODE_NB_BANK; i++) { 464 gdp->node_list[i].top_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE; 465 gdp->node_list[i].btm_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE; 466 } 467 468 if (sti_vtg_unregister_client(gdp->vtg, &gdp->vtg_field_nb)) 469 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); 470 471 if (gdp->clk_pix) 472 clk_disable_unprepare(gdp->clk_pix); 473 474 gdp->plane.status = STI_PLANE_DISABLED; 475 gdp->vtg = NULL; 476 } 477 478 /** 479 * sti_gdp_field_cb 480 * @nb: notifier block 481 * @event: event message 482 * @data: private data 483 * 484 * Handle VTG top field and bottom field event. 485 * 486 * RETURNS: 487 * 0 on success. 488 */ sti_gdp_field_cb(struct notifier_block * nb,unsigned long event,void * data)489 static int sti_gdp_field_cb(struct notifier_block *nb, 490 unsigned long event, void *data) 491 { 492 struct sti_gdp *gdp = container_of(nb, struct sti_gdp, vtg_field_nb); 493 494 if (gdp->plane.status == STI_PLANE_FLUSHING) { 495 /* disable need to be synchronize on vsync event */ 496 DRM_DEBUG_DRIVER("Vsync event received => disable %s\n", 497 sti_plane_to_str(&gdp->plane)); 498 499 sti_gdp_disable(gdp); 500 } 501 502 switch (event) { 503 case VTG_TOP_FIELD_EVENT: 504 gdp->is_curr_top = true; 505 break; 506 case VTG_BOTTOM_FIELD_EVENT: 507 gdp->is_curr_top = false; 508 break; 509 default: 510 DRM_ERROR("unsupported event: %lu\n", event); 511 break; 512 } 513 514 return 0; 515 } 516 sti_gdp_init(struct sti_gdp * gdp)517 static void sti_gdp_init(struct sti_gdp *gdp) 518 { 519 struct device_node *np = gdp->dev->of_node; 520 dma_addr_t dma_addr; 521 void *base; 522 unsigned int i, size; 523 524 /* Allocate all the nodes within a single memory page */ 525 size = sizeof(struct sti_gdp_node) * 526 GDP_NODE_PER_FIELD * GDP_NODE_NB_BANK; 527 base = dma_alloc_wc(gdp->dev, size, &dma_addr, GFP_KERNEL); 528 529 if (!base) { 530 DRM_ERROR("Failed to allocate memory for GDP node\n"); 531 return; 532 } 533 memset(base, 0, size); 534 535 for (i = 0; i < GDP_NODE_NB_BANK; i++) { 536 if (dma_addr & 0xF) { 537 DRM_ERROR("Mem alignment failed\n"); 538 return; 539 } 540 gdp->node_list[i].top_field = base; 541 gdp->node_list[i].top_field_paddr = dma_addr; 542 543 DRM_DEBUG_DRIVER("node[%d].top_field=%p\n", i, base); 544 base += sizeof(struct sti_gdp_node); 545 dma_addr += sizeof(struct sti_gdp_node); 546 547 if (dma_addr & 0xF) { 548 DRM_ERROR("Mem alignment failed\n"); 549 return; 550 } 551 gdp->node_list[i].btm_field = base; 552 gdp->node_list[i].btm_field_paddr = dma_addr; 553 DRM_DEBUG_DRIVER("node[%d].btm_field=%p\n", i, base); 554 base += sizeof(struct sti_gdp_node); 555 dma_addr += sizeof(struct sti_gdp_node); 556 } 557 558 if (of_device_is_compatible(np, "st,stih407-compositor")) { 559 /* GDP of STiH407 chip have its own pixel clock */ 560 char *clk_name; 561 562 switch (gdp->plane.desc) { 563 case STI_GDP_0: 564 clk_name = "pix_gdp1"; 565 break; 566 case STI_GDP_1: 567 clk_name = "pix_gdp2"; 568 break; 569 case STI_GDP_2: 570 clk_name = "pix_gdp3"; 571 break; 572 case STI_GDP_3: 573 clk_name = "pix_gdp4"; 574 break; 575 default: 576 DRM_ERROR("GDP id not recognized\n"); 577 return; 578 } 579 580 gdp->clk_pix = devm_clk_get(gdp->dev, clk_name); 581 if (IS_ERR(gdp->clk_pix)) 582 DRM_ERROR("Cannot get %s clock\n", clk_name); 583 584 gdp->clk_main_parent = devm_clk_get(gdp->dev, "main_parent"); 585 if (IS_ERR(gdp->clk_main_parent)) 586 DRM_ERROR("Cannot get main_parent clock\n"); 587 588 gdp->clk_aux_parent = devm_clk_get(gdp->dev, "aux_parent"); 589 if (IS_ERR(gdp->clk_aux_parent)) 590 DRM_ERROR("Cannot get aux_parent clock\n"); 591 } 592 } 593 594 /** 595 * sti_gdp_get_dst 596 * @dev: device 597 * @dst: requested destination size 598 * @src: source size 599 * 600 * Return the cropped / clamped destination size 601 * 602 * RETURNS: 603 * cropped / clamped destination size 604 */ sti_gdp_get_dst(struct device * dev,int dst,int src)605 static int sti_gdp_get_dst(struct device *dev, int dst, int src) 606 { 607 if (dst == src) 608 return dst; 609 610 if (dst < src) { 611 dev_dbg(dev, "WARNING: GDP scale not supported, will crop\n"); 612 return dst; 613 } 614 615 dev_dbg(dev, "WARNING: GDP scale not supported, will clamp\n"); 616 return src; 617 } 618 sti_gdp_atomic_check(struct drm_plane * drm_plane,struct drm_atomic_state * state)619 static int sti_gdp_atomic_check(struct drm_plane *drm_plane, 620 struct drm_atomic_state *state) 621 { 622 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 623 drm_plane); 624 struct sti_plane *plane = to_sti_plane(drm_plane); 625 struct sti_gdp *gdp = to_sti_gdp(plane); 626 struct drm_crtc *crtc = new_plane_state->crtc; 627 struct drm_framebuffer *fb = new_plane_state->fb; 628 struct drm_crtc_state *crtc_state; 629 struct sti_mixer *mixer; 630 struct drm_display_mode *mode; 631 int dst_x, dst_y, dst_w, dst_h; 632 int src_x, src_y, src_w, src_h; 633 int format; 634 635 /* no need for further checks if the plane is being disabled */ 636 if (!crtc || !fb) 637 return 0; 638 639 mixer = to_sti_mixer(crtc); 640 crtc_state = drm_atomic_get_crtc_state(state, crtc); 641 if (IS_ERR(crtc_state)) 642 return PTR_ERR(crtc_state); 643 644 mode = &crtc_state->mode; 645 dst_x = new_plane_state->crtc_x; 646 dst_y = new_plane_state->crtc_y; 647 dst_w = clamp_val(new_plane_state->crtc_w, 0, mode->hdisplay - dst_x); 648 dst_h = clamp_val(new_plane_state->crtc_h, 0, mode->vdisplay - dst_y); 649 /* src_x are in 16.16 format */ 650 src_x = new_plane_state->src_x >> 16; 651 src_y = new_plane_state->src_y >> 16; 652 src_w = clamp_val(new_plane_state->src_w >> 16, 0, 653 GAM_GDP_SIZE_MAX_WIDTH); 654 src_h = clamp_val(new_plane_state->src_h >> 16, 0, 655 GAM_GDP_SIZE_MAX_HEIGHT); 656 657 format = sti_gdp_fourcc2format(fb->format->format); 658 if (format == -1) { 659 DRM_ERROR("Format not supported by GDP %.4s\n", 660 (char *)&fb->format->format); 661 return -EINVAL; 662 } 663 664 if (!drm_fb_dma_get_gem_obj(fb, 0)) { 665 DRM_ERROR("Can't get DMA GEM object for fb\n"); 666 return -EINVAL; 667 } 668 669 /* Set gdp clock */ 670 if (mode->clock && gdp->clk_pix) { 671 struct clk *clkp; 672 int rate = mode->clock * 1000; 673 int res; 674 675 /* 676 * According to the mixer used, the gdp pixel clock 677 * should have a different parent clock. 678 */ 679 if (mixer->id == STI_MIXER_MAIN) 680 clkp = gdp->clk_main_parent; 681 else 682 clkp = gdp->clk_aux_parent; 683 684 if (clkp) 685 clk_set_parent(gdp->clk_pix, clkp); 686 687 res = clk_set_rate(gdp->clk_pix, rate); 688 if (res < 0) { 689 DRM_ERROR("Cannot set rate (%dHz) for gdp\n", 690 rate); 691 return -EINVAL; 692 } 693 } 694 695 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n", 696 crtc->base.id, sti_mixer_to_str(mixer), 697 drm_plane->base.id, sti_plane_to_str(plane)); 698 DRM_DEBUG_KMS("%s dst=(%dx%d)@(%d,%d) - src=(%dx%d)@(%d,%d)\n", 699 sti_plane_to_str(plane), 700 dst_w, dst_h, dst_x, dst_y, 701 src_w, src_h, src_x, src_y); 702 703 return 0; 704 } 705 sti_gdp_atomic_update(struct drm_plane * drm_plane,struct drm_atomic_state * state)706 static void sti_gdp_atomic_update(struct drm_plane *drm_plane, 707 struct drm_atomic_state *state) 708 { 709 struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, 710 drm_plane); 711 struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, 712 drm_plane); 713 struct sti_plane *plane = to_sti_plane(drm_plane); 714 struct sti_gdp *gdp = to_sti_gdp(plane); 715 struct drm_crtc *crtc = newstate->crtc; 716 struct drm_framebuffer *fb = newstate->fb; 717 struct drm_display_mode *mode; 718 int dst_x, dst_y, dst_w, dst_h; 719 int src_x, src_y, src_w, src_h; 720 struct drm_gem_dma_object *dma_obj; 721 struct sti_gdp_node_list *list; 722 struct sti_gdp_node_list *curr_list; 723 struct sti_gdp_node *top_field, *btm_field; 724 u32 dma_updated_top; 725 u32 dma_updated_btm; 726 int format; 727 unsigned int bpp; 728 u32 ydo, xdo, yds, xds; 729 730 if (!crtc || !fb) 731 return; 732 733 if ((oldstate->fb == newstate->fb) && 734 (oldstate->crtc_x == newstate->crtc_x) && 735 (oldstate->crtc_y == newstate->crtc_y) && 736 (oldstate->crtc_w == newstate->crtc_w) && 737 (oldstate->crtc_h == newstate->crtc_h) && 738 (oldstate->src_x == newstate->src_x) && 739 (oldstate->src_y == newstate->src_y) && 740 (oldstate->src_w == newstate->src_w) && 741 (oldstate->src_h == newstate->src_h)) { 742 /* No change since last update, do not post cmd */ 743 DRM_DEBUG_DRIVER("No change, not posting cmd\n"); 744 plane->status = STI_PLANE_UPDATED; 745 return; 746 } 747 748 if (!gdp->vtg) { 749 struct sti_compositor *compo = dev_get_drvdata(gdp->dev); 750 struct sti_mixer *mixer = to_sti_mixer(crtc); 751 752 /* Register gdp callback */ 753 gdp->vtg = compo->vtg[mixer->id]; 754 sti_vtg_register_client(gdp->vtg, &gdp->vtg_field_nb, crtc); 755 clk_prepare_enable(gdp->clk_pix); 756 } 757 758 mode = &crtc->mode; 759 dst_x = newstate->crtc_x; 760 dst_y = newstate->crtc_y; 761 dst_w = clamp_val(newstate->crtc_w, 0, mode->hdisplay - dst_x); 762 dst_h = clamp_val(newstate->crtc_h, 0, mode->vdisplay - dst_y); 763 /* src_x are in 16.16 format */ 764 src_x = newstate->src_x >> 16; 765 src_y = newstate->src_y >> 16; 766 src_w = clamp_val(newstate->src_w >> 16, 0, GAM_GDP_SIZE_MAX_WIDTH); 767 src_h = clamp_val(newstate->src_h >> 16, 0, GAM_GDP_SIZE_MAX_HEIGHT); 768 769 list = sti_gdp_get_free_nodes(gdp); 770 top_field = list->top_field; 771 btm_field = list->btm_field; 772 773 dev_dbg(gdp->dev, "%s %s top_node:0x%p btm_node:0x%p\n", __func__, 774 sti_plane_to_str(plane), top_field, btm_field); 775 776 /* build the top field */ 777 top_field->gam_gdp_agc = GAM_GDP_AGC_FULL_RANGE; 778 top_field->gam_gdp_ctl = WAIT_NEXT_VSYNC; 779 format = sti_gdp_fourcc2format(fb->format->format); 780 top_field->gam_gdp_ctl |= format; 781 top_field->gam_gdp_ctl |= sti_gdp_get_alpharange(format); 782 top_field->gam_gdp_ppt &= ~GAM_GDP_PPT_IGNORE; 783 784 dma_obj = drm_fb_dma_get_gem_obj(fb, 0); 785 786 DRM_DEBUG_DRIVER("drm FB:%d format:%.4s phys@:0x%lx\n", fb->base.id, 787 (char *)&fb->format->format, 788 (unsigned long) dma_obj->dma_addr); 789 790 /* pixel memory location */ 791 bpp = fb->format->cpp[0]; 792 top_field->gam_gdp_pml = (u32) dma_obj->dma_addr + fb->offsets[0]; 793 top_field->gam_gdp_pml += src_x * bpp; 794 top_field->gam_gdp_pml += src_y * fb->pitches[0]; 795 796 /* output parameters (clamped / cropped) */ 797 dst_w = sti_gdp_get_dst(gdp->dev, dst_w, src_w); 798 dst_h = sti_gdp_get_dst(gdp->dev, dst_h, src_h); 799 ydo = sti_vtg_get_line_number(*mode, dst_y); 800 yds = sti_vtg_get_line_number(*mode, dst_y + dst_h - 1); 801 xdo = sti_vtg_get_pixel_number(*mode, dst_x); 802 xds = sti_vtg_get_pixel_number(*mode, dst_x + dst_w - 1); 803 top_field->gam_gdp_vpo = (ydo << 16) | xdo; 804 top_field->gam_gdp_vps = (yds << 16) | xds; 805 806 /* input parameters */ 807 src_w = dst_w; 808 top_field->gam_gdp_pmp = fb->pitches[0]; 809 top_field->gam_gdp_size = src_h << 16 | src_w; 810 811 /* Same content and chained together */ 812 memcpy(btm_field, top_field, sizeof(*btm_field)); 813 top_field->gam_gdp_nvn = list->btm_field_paddr; 814 btm_field->gam_gdp_nvn = list->top_field_paddr; 815 816 /* Interlaced mode */ 817 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 818 btm_field->gam_gdp_pml = top_field->gam_gdp_pml + 819 fb->pitches[0]; 820 821 /* Update the NVN field of the 'right' field of the current GDP node 822 * (being used by the HW) with the address of the updated ('free') top 823 * field GDP node. 824 * - In interlaced mode the 'right' field is the bottom field as we 825 * update frames starting from their top field 826 * - In progressive mode, we update both bottom and top fields which 827 * are equal nodes. 828 * At the next VSYNC, the updated node list will be used by the HW. 829 */ 830 curr_list = sti_gdp_get_current_nodes(gdp); 831 dma_updated_top = list->top_field_paddr; 832 dma_updated_btm = list->btm_field_paddr; 833 834 dev_dbg(gdp->dev, "Current NVN:0x%X\n", 835 readl(gdp->regs + GAM_GDP_NVN_OFFSET)); 836 dev_dbg(gdp->dev, "Posted buff: %lx current buff: %x\n", 837 (unsigned long) dma_obj->dma_addr, 838 readl(gdp->regs + GAM_GDP_PML_OFFSET)); 839 840 if (!curr_list) { 841 /* First update or invalid node should directly write in the 842 * hw register */ 843 DRM_DEBUG_DRIVER("%s first update (or invalid node)\n", 844 sti_plane_to_str(plane)); 845 846 writel(gdp->is_curr_top ? 847 dma_updated_btm : dma_updated_top, 848 gdp->regs + GAM_GDP_NVN_OFFSET); 849 goto end; 850 } 851 852 if (mode->flags & DRM_MODE_FLAG_INTERLACE) { 853 if (gdp->is_curr_top) { 854 /* Do not update in the middle of the frame, but 855 * postpone the update after the bottom field has 856 * been displayed */ 857 curr_list->btm_field->gam_gdp_nvn = dma_updated_top; 858 } else { 859 /* Direct update to avoid one frame delay */ 860 writel(dma_updated_top, 861 gdp->regs + GAM_GDP_NVN_OFFSET); 862 } 863 } else { 864 /* Direct update for progressive to avoid one frame delay */ 865 writel(dma_updated_top, gdp->regs + GAM_GDP_NVN_OFFSET); 866 } 867 868 end: 869 sti_plane_update_fps(plane, true, false); 870 871 plane->status = STI_PLANE_UPDATED; 872 } 873 sti_gdp_atomic_disable(struct drm_plane * drm_plane,struct drm_atomic_state * state)874 static void sti_gdp_atomic_disable(struct drm_plane *drm_plane, 875 struct drm_atomic_state *state) 876 { 877 struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, 878 drm_plane); 879 struct sti_plane *plane = to_sti_plane(drm_plane); 880 881 if (!oldstate->crtc) { 882 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", 883 drm_plane->base.id); 884 return; 885 } 886 887 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", 888 oldstate->crtc->base.id, 889 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)), 890 drm_plane->base.id, sti_plane_to_str(plane)); 891 892 plane->status = STI_PLANE_DISABLING; 893 } 894 895 static const struct drm_plane_helper_funcs sti_gdp_helpers_funcs = { 896 .atomic_check = sti_gdp_atomic_check, 897 .atomic_update = sti_gdp_atomic_update, 898 .atomic_disable = sti_gdp_atomic_disable, 899 }; 900 sti_gdp_late_register(struct drm_plane * drm_plane)901 static int sti_gdp_late_register(struct drm_plane *drm_plane) 902 { 903 struct sti_plane *plane = to_sti_plane(drm_plane); 904 struct sti_gdp *gdp = to_sti_gdp(plane); 905 906 return gdp_debugfs_init(gdp, drm_plane->dev->primary); 907 } 908 909 static const struct drm_plane_funcs sti_gdp_plane_helpers_funcs = { 910 .update_plane = drm_atomic_helper_update_plane, 911 .disable_plane = drm_atomic_helper_disable_plane, 912 .destroy = drm_plane_cleanup, 913 .reset = drm_atomic_helper_plane_reset, 914 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 915 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 916 .late_register = sti_gdp_late_register, 917 }; 918 sti_gdp_create(struct drm_device * drm_dev,struct device * dev,int desc,void __iomem * baseaddr,unsigned int possible_crtcs,enum drm_plane_type type)919 struct drm_plane *sti_gdp_create(struct drm_device *drm_dev, 920 struct device *dev, int desc, 921 void __iomem *baseaddr, 922 unsigned int possible_crtcs, 923 enum drm_plane_type type) 924 { 925 struct sti_gdp *gdp; 926 int res; 927 928 gdp = devm_kzalloc(dev, sizeof(*gdp), GFP_KERNEL); 929 if (!gdp) { 930 DRM_ERROR("Failed to allocate memory for GDP\n"); 931 return NULL; 932 } 933 934 gdp->dev = dev; 935 gdp->regs = baseaddr; 936 gdp->plane.desc = desc; 937 gdp->plane.status = STI_PLANE_DISABLED; 938 939 gdp->vtg_field_nb.notifier_call = sti_gdp_field_cb; 940 941 sti_gdp_init(gdp); 942 943 res = drm_universal_plane_init(drm_dev, &gdp->plane.drm_plane, 944 possible_crtcs, 945 &sti_gdp_plane_helpers_funcs, 946 gdp_supported_formats, 947 ARRAY_SIZE(gdp_supported_formats), 948 NULL, type, NULL); 949 if (res) { 950 DRM_ERROR("Failed to initialize universal plane\n"); 951 goto err; 952 } 953 954 drm_plane_helper_add(&gdp->plane.drm_plane, &sti_gdp_helpers_funcs); 955 956 sti_plane_init_property(&gdp->plane, type); 957 958 return &gdp->plane.drm_plane; 959 960 err: 961 devm_kfree(dev, gdp); 962 return NULL; 963 } 964